From: Heikki Krogerus Date: Thu, 20 Sep 2018 11:23:47 +0000 (+0300) Subject: usb: typec: Group all TCPCI/TCPM code together X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=ae8a2ca8a2215c7e31e6d874f7303801bb15fbbc;p=openwrt%2Fstaging%2Fblogic.git usb: typec: Group all TCPCI/TCPM code together Moving all the drivers that depend on the Port Controller Manager under a new directory drivers/usb/typec/tcpm/ and making Guenter Roeck the designated reviewer of that code. Acked-by: Guenter Roeck Signed-off-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- diff --git a/MAINTAINERS b/MAINTAINERS index 4ece30f15777..9dff31e38fac 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15286,6 +15286,12 @@ F: Documentation/driver-api/usb/typec_bus.rst F: drivers/usb/typec/altmodes/ F: include/linux/usb/typec_altmode.h +USB TYPEC PORT CONTROLLER DRIVERS +M: Guenter Roeck +L: linux-usb@vger.kernel.org +S: Maintained +F: drivers/usb/typec/tcpm/ + USB UHCI DRIVER M: Alan Stern L: linux-usb@vger.kernel.org diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig index 00878c386dd0..30a847c2089d 100644 --- a/drivers/usb/typec/Kconfig +++ b/drivers/usb/typec/Kconfig @@ -45,50 +45,7 @@ menuconfig TYPEC if TYPEC -config TYPEC_TCPM - tristate "USB Type-C Port Controller Manager" - depends on USB - select USB_ROLE_SWITCH - select POWER_SUPPLY - help - The Type-C Port Controller Manager provides a USB PD and USB Type-C - state machine for use with Type-C Port Controllers. - -if TYPEC_TCPM - -config TYPEC_TCPCI - tristate "Type-C Port Controller Interface driver" - depends on I2C - select REGMAP_I2C - help - Type-C Port Controller driver for TCPCI-compliant controller. - -config TYPEC_RT1711H - tristate "Richtek RT1711H Type-C chip driver" - depends on I2C - select TYPEC_TCPCI - help - Richtek RT1711H Type-C chip driver that works with - Type-C Port Controller Manager to provide USB PD and USB - Type-C functionalities. - -source "drivers/usb/typec/fusb302/Kconfig" - -config TYPEC_WCOVE - tristate "Intel WhiskeyCove PMIC USB Type-C PHY driver" - depends on ACPI - depends on INTEL_SOC_PMIC - depends on INTEL_PMC_IPC - depends on BXT_WC_PMIC_OPREGION - help - This driver adds support for USB Type-C detection on Intel Broxton - platforms that have Intel Whiskey Cove PMIC. The driver can detect the - role and cable orientation. - - To compile this driver as module, choose M here: the module will be - called typec_wcove - -endif # TYPEC_TCPM +source "drivers/usb/typec/tcpm/Kconfig" source "drivers/usb/typec/ucsi/Kconfig" diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile index 45b0aef428a8..6696b7263d61 100644 --- a/drivers/usb/typec/Makefile +++ b/drivers/usb/typec/Makefile @@ -2,11 +2,7 @@ obj-$(CONFIG_TYPEC) += typec.o typec-y := class.o mux.o bus.o obj-$(CONFIG_TYPEC) += altmodes/ -obj-$(CONFIG_TYPEC_TCPM) += tcpm.o -obj-y += fusb302/ -obj-$(CONFIG_TYPEC_WCOVE) += typec_wcove.o +obj-$(CONFIG_TYPEC_TCPM) += tcpm/ obj-$(CONFIG_TYPEC_UCSI) += ucsi/ obj-$(CONFIG_TYPEC_TPS6598X) += tps6598x.o obj-$(CONFIG_TYPEC) += mux/ -obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o -obj-$(CONFIG_TYPEC_RT1711H) += tcpci_rt1711h.o diff --git a/drivers/usb/typec/fusb302/Kconfig b/drivers/usb/typec/fusb302/Kconfig deleted file mode 100644 index fce099ff39fe..000000000000 --- a/drivers/usb/typec/fusb302/Kconfig +++ /dev/null @@ -1,7 +0,0 @@ -config TYPEC_FUSB302 - tristate "Fairchild FUSB302 Type-C chip driver" - depends on I2C - help - The Fairchild FUSB302 Type-C chip driver that works with - Type-C Port Controller Manager to provide USB PD and USB - Type-C functionalities. diff --git a/drivers/usb/typec/fusb302/Makefile b/drivers/usb/typec/fusb302/Makefile deleted file mode 100644 index 3b51b33631a0..000000000000 --- a/drivers/usb/typec/fusb302/Makefile +++ /dev/null @@ -1,2 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_TYPEC_FUSB302) += fusb302.o diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c deleted file mode 100644 index 6e9370a813f7..000000000000 --- a/drivers/usb/typec/fusb302/fusb302.c +++ /dev/null @@ -1,1861 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright 2016-2017 Google, Inc - * - * Fairchild FUSB302 Type-C Chip Driver - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "fusb302_reg.h" - -/* - * When the device is SNK, BC_LVL interrupt is used to monitor cc pins - * for the current capability offered by the SRC. As FUSB302 chip fires - * the BC_LVL interrupt on PD signalings, cc lvl should be handled after - * a delay to avoid measuring on PD activities. The delay is slightly - * longer than PD_T_PD_DEBPUNCE (10-20ms). - */ -#define T_BC_LVL_DEBOUNCE_DELAY_MS 30 - -enum toggling_mode { - TOGGLINE_MODE_OFF, - TOGGLING_MODE_DRP, - TOGGLING_MODE_SNK, - TOGGLING_MODE_SRC, -}; - -enum src_current_status { - SRC_CURRENT_DEFAULT, - SRC_CURRENT_MEDIUM, - SRC_CURRENT_HIGH, -}; - -static const u8 ra_mda_value[] = { - [SRC_CURRENT_DEFAULT] = 4, /* 210mV */ - [SRC_CURRENT_MEDIUM] = 9, /* 420mV */ - [SRC_CURRENT_HIGH] = 18, /* 798mV */ -}; - -static const u8 rd_mda_value[] = { - [SRC_CURRENT_DEFAULT] = 38, /* 1638mV */ - [SRC_CURRENT_MEDIUM] = 38, /* 1638mV */ - [SRC_CURRENT_HIGH] = 61, /* 2604mV */ -}; - -#define LOG_BUFFER_ENTRIES 1024 -#define LOG_BUFFER_ENTRY_SIZE 128 - -struct fusb302_chip { - struct device *dev; - struct i2c_client *i2c_client; - struct tcpm_port *tcpm_port; - struct tcpc_dev tcpc_dev; - struct tcpc_config tcpc_config; - - struct regulator *vbus; - - int gpio_int_n; - int gpio_int_n_irq; - struct extcon_dev *extcon; - - struct workqueue_struct *wq; - struct delayed_work bc_lvl_handler; - - atomic_t pm_suspend; - atomic_t i2c_busy; - - /* lock for sharing chip states */ - struct mutex lock; - - /* chip status */ - enum toggling_mode toggling_mode; - enum src_current_status src_current_status; - bool intr_togdone; - bool intr_bc_lvl; - bool intr_comp_chng; - - /* port status */ - bool pull_up; - bool vconn_on; - bool vbus_on; - bool charge_on; - bool vbus_present; - enum typec_cc_polarity cc_polarity; - enum typec_cc_status cc1; - enum typec_cc_status cc2; - u32 snk_pdo[PDO_MAX_OBJECTS]; - -#ifdef CONFIG_DEBUG_FS - struct dentry *dentry; - /* lock for log buffer access */ - struct mutex logbuffer_lock; - int logbuffer_head; - int logbuffer_tail; - u8 *logbuffer[LOG_BUFFER_ENTRIES]; -#endif -}; - -/* - * Logging - */ - -#ifdef CONFIG_DEBUG_FS - -static bool fusb302_log_full(struct fusb302_chip *chip) -{ - return chip->logbuffer_tail == - (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; -} - -static void _fusb302_log(struct fusb302_chip *chip, const char *fmt, - va_list args) -{ - char tmpbuffer[LOG_BUFFER_ENTRY_SIZE]; - u64 ts_nsec = local_clock(); - unsigned long rem_nsec; - - if (!chip->logbuffer[chip->logbuffer_head]) { - chip->logbuffer[chip->logbuffer_head] = - kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL); - if (!chip->logbuffer[chip->logbuffer_head]) - return; - } - - vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args); - - mutex_lock(&chip->logbuffer_lock); - - if (fusb302_log_full(chip)) { - chip->logbuffer_head = max(chip->logbuffer_head - 1, 0); - strlcpy(tmpbuffer, "overflow", sizeof(tmpbuffer)); - } - - if (chip->logbuffer_head < 0 || - chip->logbuffer_head >= LOG_BUFFER_ENTRIES) { - dev_warn(chip->dev, - "Bad log buffer index %d\n", chip->logbuffer_head); - goto abort; - } - - if (!chip->logbuffer[chip->logbuffer_head]) { - dev_warn(chip->dev, - "Log buffer index %d is NULL\n", chip->logbuffer_head); - goto abort; - } - - rem_nsec = do_div(ts_nsec, 1000000000); - scnprintf(chip->logbuffer[chip->logbuffer_head], - LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s", - (unsigned long)ts_nsec, rem_nsec / 1000, - tmpbuffer); - chip->logbuffer_head = (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; - -abort: - mutex_unlock(&chip->logbuffer_lock); -} - -static void fusb302_log(struct fusb302_chip *chip, const char *fmt, ...) -{ - va_list args; - - va_start(args, fmt); - _fusb302_log(chip, fmt, args); - va_end(args); -} - -static int fusb302_debug_show(struct seq_file *s, void *v) -{ - struct fusb302_chip *chip = (struct fusb302_chip *)s->private; - int tail; - - mutex_lock(&chip->logbuffer_lock); - tail = chip->logbuffer_tail; - while (tail != chip->logbuffer_head) { - seq_printf(s, "%s\n", chip->logbuffer[tail]); - tail = (tail + 1) % LOG_BUFFER_ENTRIES; - } - if (!seq_has_overflowed(s)) - chip->logbuffer_tail = tail; - mutex_unlock(&chip->logbuffer_lock); - - return 0; -} -DEFINE_SHOW_ATTRIBUTE(fusb302_debug); - -static struct dentry *rootdir; - -static void fusb302_debugfs_init(struct fusb302_chip *chip) -{ - mutex_init(&chip->logbuffer_lock); - if (!rootdir) - rootdir = debugfs_create_dir("fusb302", NULL); - - chip->dentry = debugfs_create_file(dev_name(chip->dev), - S_IFREG | 0444, rootdir, - chip, &fusb302_debug_fops); -} - -static void fusb302_debugfs_exit(struct fusb302_chip *chip) -{ - debugfs_remove(chip->dentry); - debugfs_remove(rootdir); -} - -#else - -static void fusb302_log(const struct fusb302_chip *chip, - const char *fmt, ...) { } -static void fusb302_debugfs_init(const struct fusb302_chip *chip) { } -static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { } - -#endif - -#define FUSB302_RESUME_RETRY 10 -#define FUSB302_RESUME_RETRY_SLEEP 50 - -static bool fusb302_is_suspended(struct fusb302_chip *chip) -{ - int retry_cnt; - - for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) { - if (atomic_read(&chip->pm_suspend)) { - dev_err(chip->dev, "i2c: pm suspend, retry %d/%d\n", - retry_cnt + 1, FUSB302_RESUME_RETRY); - msleep(FUSB302_RESUME_RETRY_SLEEP); - } else { - return false; - } - } - - return true; -} - -static int fusb302_i2c_write(struct fusb302_chip *chip, - u8 address, u8 data) -{ - int ret = 0; - - atomic_set(&chip->i2c_busy, 1); - - if (fusb302_is_suspended(chip)) { - atomic_set(&chip->i2c_busy, 0); - return -ETIMEDOUT; - } - - ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data); - if (ret < 0) - fusb302_log(chip, "cannot write 0x%02x to 0x%02x, ret=%d", - data, address, ret); - atomic_set(&chip->i2c_busy, 0); - - return ret; -} - -static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address, - u8 length, const u8 *data) -{ - int ret = 0; - - if (length <= 0) - return ret; - atomic_set(&chip->i2c_busy, 1); - - if (fusb302_is_suspended(chip)) { - atomic_set(&chip->i2c_busy, 0); - return -ETIMEDOUT; - } - - ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address, - length, data); - if (ret < 0) - fusb302_log(chip, "cannot block write 0x%02x, len=%d, ret=%d", - address, length, ret); - atomic_set(&chip->i2c_busy, 0); - - return ret; -} - -static int fusb302_i2c_read(struct fusb302_chip *chip, - u8 address, u8 *data) -{ - int ret = 0; - - atomic_set(&chip->i2c_busy, 1); - - if (fusb302_is_suspended(chip)) { - atomic_set(&chip->i2c_busy, 0); - return -ETIMEDOUT; - } - - ret = i2c_smbus_read_byte_data(chip->i2c_client, address); - *data = (u8)ret; - if (ret < 0) - fusb302_log(chip, "cannot read %02x, ret=%d", address, ret); - atomic_set(&chip->i2c_busy, 0); - - return ret; -} - -static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address, - u8 length, u8 *data) -{ - int ret = 0; - - if (length <= 0) - return ret; - atomic_set(&chip->i2c_busy, 1); - - if (fusb302_is_suspended(chip)) { - atomic_set(&chip->i2c_busy, 0); - return -ETIMEDOUT; - } - - ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address, - length, data); - if (ret < 0) { - fusb302_log(chip, "cannot block read 0x%02x, len=%d, ret=%d", - address, length, ret); - goto done; - } - if (ret != length) { - fusb302_log(chip, "only read %d/%d bytes from 0x%02x", - ret, length, address); - ret = -EIO; - } - -done: - atomic_set(&chip->i2c_busy, 0); - - return ret; -} - -static int fusb302_i2c_mask_write(struct fusb302_chip *chip, u8 address, - u8 mask, u8 value) -{ - int ret = 0; - u8 data; - - ret = fusb302_i2c_read(chip, address, &data); - if (ret < 0) - return ret; - data &= ~mask; - data |= value; - ret = fusb302_i2c_write(chip, address, data); - if (ret < 0) - return ret; - - return ret; -} - -static int fusb302_i2c_set_bits(struct fusb302_chip *chip, u8 address, - u8 set_bits) -{ - return fusb302_i2c_mask_write(chip, address, 0x00, set_bits); -} - -static int fusb302_i2c_clear_bits(struct fusb302_chip *chip, u8 address, - u8 clear_bits) -{ - return fusb302_i2c_mask_write(chip, address, clear_bits, 0x00); -} - -static int fusb302_sw_reset(struct fusb302_chip *chip) -{ - int ret = 0; - - ret = fusb302_i2c_write(chip, FUSB_REG_RESET, - FUSB_REG_RESET_SW_RESET); - if (ret < 0) - fusb302_log(chip, "cannot sw reset the chip, ret=%d", ret); - else - fusb302_log(chip, "sw reset"); - - return ret; -} - -static int fusb302_enable_tx_auto_retries(struct fusb302_chip *chip) -{ - int ret = 0; - - ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3, - FUSB_REG_CONTROL3_N_RETRIES_3 | - FUSB_REG_CONTROL3_AUTO_RETRY); - - return ret; -} - -/* - * initialize interrupt on the chip - * - unmasked interrupt: VBUS_OK - */ -static int fusb302_init_interrupt(struct fusb302_chip *chip) -{ - int ret = 0; - - ret = fusb302_i2c_write(chip, FUSB_REG_MASK, - 0xFF & ~FUSB_REG_MASK_VBUSOK); - if (ret < 0) - return ret; - ret = fusb302_i2c_write(chip, FUSB_REG_MASKA, 0xFF); - if (ret < 0) - return ret; - ret = fusb302_i2c_write(chip, FUSB_REG_MASKB, 0xFF); - if (ret < 0) - return ret; - ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL0, - FUSB_REG_CONTROL0_INT_MASK); - if (ret < 0) - return ret; - - return ret; -} - -static int fusb302_set_power_mode(struct fusb302_chip *chip, u8 power_mode) -{ - int ret = 0; - - ret = fusb302_i2c_write(chip, FUSB_REG_POWER, power_mode); - - return ret; -} - -static int tcpm_init(struct tcpc_dev *dev) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - u8 data; - - ret = fusb302_sw_reset(chip); - if (ret < 0) - return ret; - ret = fusb302_enable_tx_auto_retries(chip); - if (ret < 0) - return ret; - ret = fusb302_init_interrupt(chip); - if (ret < 0) - return ret; - ret = fusb302_set_power_mode(chip, FUSB_REG_POWER_PWR_ALL); - if (ret < 0) - return ret; - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &data); - if (ret < 0) - return ret; - chip->vbus_present = !!(data & FUSB_REG_STATUS0_VBUSOK); - ret = fusb302_i2c_read(chip, FUSB_REG_DEVICE_ID, &data); - if (ret < 0) - return ret; - fusb302_log(chip, "fusb302 device ID: 0x%02x", data); - - return ret; -} - -static int tcpm_get_vbus(struct tcpc_dev *dev) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - - mutex_lock(&chip->lock); - ret = chip->vbus_present ? 1 : 0; - mutex_unlock(&chip->lock); - - return ret; -} - -static int tcpm_get_current_limit(struct tcpc_dev *dev) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int current_limit = 0; - unsigned long timeout; - - if (!chip->extcon) - return 0; - - /* - * USB2 Charger detection may still be in progress when we get here, - * this can take upto 600ms, wait 800ms max. - */ - timeout = jiffies + msecs_to_jiffies(800); - do { - if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_SDP) == 1) - current_limit = 500; - - if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_CDP) == 1 || - extcon_get_state(chip->extcon, EXTCON_CHG_USB_ACA) == 1) - current_limit = 1500; - - if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_DCP) == 1) - current_limit = 2000; - - msleep(50); - } while (current_limit == 0 && time_before(jiffies, timeout)); - - return current_limit; -} - -static int fusb302_set_cc_pull(struct fusb302_chip *chip, - bool pull_up, bool pull_down) -{ - int ret = 0; - u8 data = 0x00; - u8 mask = FUSB_REG_SWITCHES0_CC1_PU_EN | - FUSB_REG_SWITCHES0_CC2_PU_EN | - FUSB_REG_SWITCHES0_CC1_PD_EN | - FUSB_REG_SWITCHES0_CC2_PD_EN; - - if (pull_up) - data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ? - FUSB_REG_SWITCHES0_CC1_PU_EN : - FUSB_REG_SWITCHES0_CC2_PU_EN; - if (pull_down) - data |= FUSB_REG_SWITCHES0_CC1_PD_EN | - FUSB_REG_SWITCHES0_CC2_PD_EN; - ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, - mask, data); - if (ret < 0) - return ret; - chip->pull_up = pull_up; - - return ret; -} - -static int fusb302_set_src_current(struct fusb302_chip *chip, - enum src_current_status status) -{ - int ret = 0; - - chip->src_current_status = status; - switch (status) { - case SRC_CURRENT_DEFAULT: - ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, - FUSB_REG_CONTROL0_HOST_CUR_MASK, - FUSB_REG_CONTROL0_HOST_CUR_DEF); - break; - case SRC_CURRENT_MEDIUM: - ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, - FUSB_REG_CONTROL0_HOST_CUR_MASK, - FUSB_REG_CONTROL0_HOST_CUR_MED); - break; - case SRC_CURRENT_HIGH: - ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, - FUSB_REG_CONTROL0_HOST_CUR_MASK, - FUSB_REG_CONTROL0_HOST_CUR_HIGH); - break; - default: - break; - } - - return ret; -} - -static int fusb302_set_toggling(struct fusb302_chip *chip, - enum toggling_mode mode) -{ - int ret = 0; - - /* first disable toggling */ - ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL2, - FUSB_REG_CONTROL2_TOGGLE); - if (ret < 0) - return ret; - /* mask interrupts for SRC or SNK */ - ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASK, - FUSB_REG_MASK_BC_LVL | - FUSB_REG_MASK_COMP_CHNG); - if (ret < 0) - return ret; - chip->intr_bc_lvl = false; - chip->intr_comp_chng = false; - /* configure toggling mode: none/snk/src/drp */ - switch (mode) { - case TOGGLINE_MODE_OFF: - ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, - FUSB_REG_CONTROL2_MODE_MASK, - FUSB_REG_CONTROL2_MODE_NONE); - if (ret < 0) - return ret; - break; - case TOGGLING_MODE_SNK: - ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, - FUSB_REG_CONTROL2_MODE_MASK, - FUSB_REG_CONTROL2_MODE_UFP); - if (ret < 0) - return ret; - break; - case TOGGLING_MODE_SRC: - ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, - FUSB_REG_CONTROL2_MODE_MASK, - FUSB_REG_CONTROL2_MODE_DFP); - if (ret < 0) - return ret; - break; - case TOGGLING_MODE_DRP: - ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, - FUSB_REG_CONTROL2_MODE_MASK, - FUSB_REG_CONTROL2_MODE_DRP); - if (ret < 0) - return ret; - break; - default: - break; - } - - if (mode == TOGGLINE_MODE_OFF) { - /* mask TOGDONE interrupt */ - ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, - FUSB_REG_MASKA_TOGDONE); - if (ret < 0) - return ret; - chip->intr_togdone = false; - } else { - /* unmask TOGDONE interrupt */ - ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, - FUSB_REG_MASKA_TOGDONE); - if (ret < 0) - return ret; - chip->intr_togdone = true; - /* start toggling */ - ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL2, - FUSB_REG_CONTROL2_TOGGLE); - if (ret < 0) - return ret; - /* during toggling, consider cc as Open */ - chip->cc1 = TYPEC_CC_OPEN; - chip->cc2 = TYPEC_CC_OPEN; - } - chip->toggling_mode = mode; - - return ret; -} - -static const char * const typec_cc_status_name[] = { - [TYPEC_CC_OPEN] = "Open", - [TYPEC_CC_RA] = "Ra", - [TYPEC_CC_RD] = "Rd", - [TYPEC_CC_RP_DEF] = "Rp-def", - [TYPEC_CC_RP_1_5] = "Rp-1.5", - [TYPEC_CC_RP_3_0] = "Rp-3.0", -}; - -static const enum src_current_status cc_src_current[] = { - [TYPEC_CC_OPEN] = SRC_CURRENT_DEFAULT, - [TYPEC_CC_RA] = SRC_CURRENT_DEFAULT, - [TYPEC_CC_RD] = SRC_CURRENT_DEFAULT, - [TYPEC_CC_RP_DEF] = SRC_CURRENT_DEFAULT, - [TYPEC_CC_RP_1_5] = SRC_CURRENT_MEDIUM, - [TYPEC_CC_RP_3_0] = SRC_CURRENT_HIGH, -}; - -static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - bool pull_up, pull_down; - u8 rd_mda; - - mutex_lock(&chip->lock); - switch (cc) { - case TYPEC_CC_OPEN: - pull_up = false; - pull_down = false; - break; - case TYPEC_CC_RD: - pull_up = false; - pull_down = true; - break; - case TYPEC_CC_RP_DEF: - case TYPEC_CC_RP_1_5: - case TYPEC_CC_RP_3_0: - pull_up = true; - pull_down = false; - break; - default: - fusb302_log(chip, "unsupported cc value %s", - typec_cc_status_name[cc]); - ret = -EINVAL; - goto done; - } - ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF); - if (ret < 0) { - fusb302_log(chip, "cannot stop toggling, ret=%d", ret); - goto done; - } - ret = fusb302_set_cc_pull(chip, pull_up, pull_down); - if (ret < 0) { - fusb302_log(chip, - "cannot set cc pulling up %s, down %s, ret = %d", - pull_up ? "True" : "False", - pull_down ? "True" : "False", - ret); - goto done; - } - /* reset the cc status */ - chip->cc1 = TYPEC_CC_OPEN; - chip->cc2 = TYPEC_CC_OPEN; - /* adjust current for SRC */ - if (pull_up) { - ret = fusb302_set_src_current(chip, cc_src_current[cc]); - if (ret < 0) { - fusb302_log(chip, "cannot set src current %s, ret=%d", - typec_cc_status_name[cc], ret); - goto done; - } - } - /* enable/disable interrupts, BC_LVL for SNK and COMP_CHNG for SRC */ - if (pull_up) { - rd_mda = rd_mda_value[cc_src_current[cc]]; - ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); - if (ret < 0) { - fusb302_log(chip, - "cannot set SRC measure value, ret=%d", - ret); - goto done; - } - ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK, - FUSB_REG_MASK_BC_LVL | - FUSB_REG_MASK_COMP_CHNG, - FUSB_REG_MASK_COMP_CHNG); - if (ret < 0) { - fusb302_log(chip, "cannot set SRC interrupt, ret=%d", - ret); - goto done; - } - chip->intr_bc_lvl = false; - chip->intr_comp_chng = true; - } - if (pull_down) { - ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK, - FUSB_REG_MASK_BC_LVL | - FUSB_REG_MASK_COMP_CHNG, - FUSB_REG_MASK_BC_LVL); - if (ret < 0) { - fusb302_log(chip, "cannot set SRC interrupt, ret=%d", - ret); - goto done; - } - chip->intr_bc_lvl = true; - chip->intr_comp_chng = false; - } - fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]); -done: - mutex_unlock(&chip->lock); - - return ret; -} - -static int tcpm_get_cc(struct tcpc_dev *dev, enum typec_cc_status *cc1, - enum typec_cc_status *cc2) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - - mutex_lock(&chip->lock); - *cc1 = chip->cc1; - *cc2 = chip->cc2; - fusb302_log(chip, "cc1=%s, cc2=%s", typec_cc_status_name[*cc1], - typec_cc_status_name[*cc2]); - mutex_unlock(&chip->lock); - - return 0; -} - -static int tcpm_set_polarity(struct tcpc_dev *dev, - enum typec_cc_polarity polarity) -{ - return 0; -} - -static int tcpm_set_vconn(struct tcpc_dev *dev, bool on) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - u8 switches0_data = 0x00; - u8 switches0_mask = FUSB_REG_SWITCHES0_VCONN_CC1 | - FUSB_REG_SWITCHES0_VCONN_CC2; - - mutex_lock(&chip->lock); - if (chip->vconn_on == on) { - fusb302_log(chip, "vconn is already %s", on ? "On" : "Off"); - goto done; - } - if (on) { - switches0_data = (chip->cc_polarity == TYPEC_POLARITY_CC1) ? - FUSB_REG_SWITCHES0_VCONN_CC2 : - FUSB_REG_SWITCHES0_VCONN_CC1; - } - ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, - switches0_mask, switches0_data); - if (ret < 0) - goto done; - chip->vconn_on = on; - fusb302_log(chip, "vconn := %s", on ? "On" : "Off"); -done: - mutex_unlock(&chip->lock); - - return ret; -} - -static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - - mutex_lock(&chip->lock); - if (chip->vbus_on == on) { - fusb302_log(chip, "vbus is already %s", on ? "On" : "Off"); - } else { - if (on) - ret = regulator_enable(chip->vbus); - else - ret = regulator_disable(chip->vbus); - if (ret < 0) { - fusb302_log(chip, "cannot %s vbus regulator, ret=%d", - on ? "enable" : "disable", ret); - goto done; - } - chip->vbus_on = on; - fusb302_log(chip, "vbus := %s", on ? "On" : "Off"); - } - if (chip->charge_on == charge) - fusb302_log(chip, "charge is already %s", - charge ? "On" : "Off"); - else - chip->charge_on = charge; - -done: - mutex_unlock(&chip->lock); - - return ret; -} - -static int fusb302_pd_tx_flush(struct fusb302_chip *chip) -{ - return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL0, - FUSB_REG_CONTROL0_TX_FLUSH); -} - -static int fusb302_pd_rx_flush(struct fusb302_chip *chip) -{ - return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL1, - FUSB_REG_CONTROL1_RX_FLUSH); -} - -static int fusb302_pd_set_auto_goodcrc(struct fusb302_chip *chip, bool on) -{ - if (on) - return fusb302_i2c_set_bits(chip, FUSB_REG_SWITCHES1, - FUSB_REG_SWITCHES1_AUTO_GCRC); - return fusb302_i2c_clear_bits(chip, FUSB_REG_SWITCHES1, - FUSB_REG_SWITCHES1_AUTO_GCRC); -} - -static int fusb302_pd_set_interrupts(struct fusb302_chip *chip, bool on) -{ - int ret = 0; - u8 mask_interrupts = FUSB_REG_MASK_COLLISION; - u8 maska_interrupts = FUSB_REG_MASKA_RETRYFAIL | - FUSB_REG_MASKA_HARDSENT | - FUSB_REG_MASKA_TX_SUCCESS | - FUSB_REG_MASKA_HARDRESET; - u8 maskb_interrupts = FUSB_REG_MASKB_GCRCSENT; - - ret = on ? - fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, mask_interrupts) : - fusb302_i2c_set_bits(chip, FUSB_REG_MASK, mask_interrupts); - if (ret < 0) - return ret; - ret = on ? - fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, maska_interrupts) : - fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, maska_interrupts); - if (ret < 0) - return ret; - ret = on ? - fusb302_i2c_clear_bits(chip, FUSB_REG_MASKB, maskb_interrupts) : - fusb302_i2c_set_bits(chip, FUSB_REG_MASKB, maskb_interrupts); - return ret; -} - -static int tcpm_set_pd_rx(struct tcpc_dev *dev, bool on) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - - mutex_lock(&chip->lock); - ret = fusb302_pd_rx_flush(chip); - if (ret < 0) { - fusb302_log(chip, "cannot flush pd rx buffer, ret=%d", ret); - goto done; - } - ret = fusb302_pd_tx_flush(chip); - if (ret < 0) { - fusb302_log(chip, "cannot flush pd tx buffer, ret=%d", ret); - goto done; - } - ret = fusb302_pd_set_auto_goodcrc(chip, on); - if (ret < 0) { - fusb302_log(chip, "cannot turn %s auto GCRC, ret=%d", - on ? "on" : "off", ret); - goto done; - } - ret = fusb302_pd_set_interrupts(chip, on); - if (ret < 0) { - fusb302_log(chip, "cannot turn %s pd interrupts, ret=%d", - on ? "on" : "off", ret); - goto done; - } - fusb302_log(chip, "pd := %s", on ? "on" : "off"); -done: - mutex_unlock(&chip->lock); - - return ret; -} - -static const char * const typec_role_name[] = { - [TYPEC_SINK] = "Sink", - [TYPEC_SOURCE] = "Source", -}; - -static const char * const typec_data_role_name[] = { - [TYPEC_DEVICE] = "Device", - [TYPEC_HOST] = "Host", -}; - -static int tcpm_set_roles(struct tcpc_dev *dev, bool attached, - enum typec_role pwr, enum typec_data_role data) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - u8 switches1_mask = FUSB_REG_SWITCHES1_POWERROLE | - FUSB_REG_SWITCHES1_DATAROLE; - u8 switches1_data = 0x00; - - mutex_lock(&chip->lock); - if (pwr == TYPEC_SOURCE) - switches1_data |= FUSB_REG_SWITCHES1_POWERROLE; - if (data == TYPEC_HOST) - switches1_data |= FUSB_REG_SWITCHES1_DATAROLE; - ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1, - switches1_mask, switches1_data); - if (ret < 0) { - fusb302_log(chip, "unable to set pd header %s, %s, ret=%d", - typec_role_name[pwr], typec_data_role_name[data], - ret); - goto done; - } - fusb302_log(chip, "pd header := %s, %s", typec_role_name[pwr], - typec_data_role_name[data]); -done: - mutex_unlock(&chip->lock); - - return ret; -} - -static int tcpm_start_drp_toggling(struct tcpc_dev *dev, - enum typec_cc_status cc) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - - mutex_lock(&chip->lock); - ret = fusb302_set_src_current(chip, cc_src_current[cc]); - if (ret < 0) { - fusb302_log(chip, "unable to set src current %s, ret=%d", - typec_cc_status_name[cc], ret); - goto done; - } - ret = fusb302_set_toggling(chip, TOGGLING_MODE_DRP); - if (ret < 0) { - fusb302_log(chip, - "unable to start drp toggling, ret=%d", ret); - goto done; - } - fusb302_log(chip, "start drp toggling"); -done: - mutex_unlock(&chip->lock); - - return ret; -} - -static int fusb302_pd_send_message(struct fusb302_chip *chip, - const struct pd_message *msg) -{ - int ret = 0; - u8 buf[40]; - u8 pos = 0; - int len; - - /* SOP tokens */ - buf[pos++] = FUSB302_TKN_SYNC1; - buf[pos++] = FUSB302_TKN_SYNC1; - buf[pos++] = FUSB302_TKN_SYNC1; - buf[pos++] = FUSB302_TKN_SYNC2; - - len = pd_header_cnt_le(msg->header) * 4; - /* plug 2 for header */ - len += 2; - if (len > 0x1F) { - fusb302_log(chip, - "PD message too long %d (incl. header)", len); - return -EINVAL; - } - /* packsym tells the FUSB302 chip that the next X bytes are payload */ - buf[pos++] = FUSB302_TKN_PACKSYM | (len & 0x1F); - memcpy(&buf[pos], &msg->header, sizeof(msg->header)); - pos += sizeof(msg->header); - - len -= 2; - memcpy(&buf[pos], msg->payload, len); - pos += len; - - /* CRC */ - buf[pos++] = FUSB302_TKN_JAMCRC; - /* EOP */ - buf[pos++] = FUSB302_TKN_EOP; - /* turn tx off after sending message */ - buf[pos++] = FUSB302_TKN_TXOFF; - /* start transmission */ - buf[pos++] = FUSB302_TKN_TXON; - - ret = fusb302_i2c_block_write(chip, FUSB_REG_FIFOS, pos, buf); - if (ret < 0) - return ret; - fusb302_log(chip, "sending PD message header: %x", msg->header); - fusb302_log(chip, "sending PD message len: %d", len); - - return ret; -} - -static int fusb302_pd_send_hardreset(struct fusb302_chip *chip) -{ - return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3, - FUSB_REG_CONTROL3_SEND_HARDRESET); -} - -static const char * const transmit_type_name[] = { - [TCPC_TX_SOP] = "SOP", - [TCPC_TX_SOP_PRIME] = "SOP'", - [TCPC_TX_SOP_PRIME_PRIME] = "SOP''", - [TCPC_TX_SOP_DEBUG_PRIME] = "DEBUG'", - [TCPC_TX_SOP_DEBUG_PRIME_PRIME] = "DEBUG''", - [TCPC_TX_HARD_RESET] = "HARD_RESET", - [TCPC_TX_CABLE_RESET] = "CABLE_RESET", - [TCPC_TX_BIST_MODE_2] = "BIST_MODE_2", -}; - -static int tcpm_pd_transmit(struct tcpc_dev *dev, enum tcpm_transmit_type type, - const struct pd_message *msg) -{ - struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, - tcpc_dev); - int ret = 0; - - mutex_lock(&chip->lock); - switch (type) { - case TCPC_TX_SOP: - ret = fusb302_pd_send_message(chip, msg); - if (ret < 0) - fusb302_log(chip, - "cannot send PD message, ret=%d", ret); - break; - case TCPC_TX_HARD_RESET: - ret = fusb302_pd_send_hardreset(chip); - if (ret < 0) - fusb302_log(chip, - "cannot send hardreset, ret=%d", ret); - break; - default: - fusb302_log(chip, "type %s not supported", - transmit_type_name[type]); - ret = -EINVAL; - } - mutex_unlock(&chip->lock); - - return ret; -} - -static enum typec_cc_status fusb302_bc_lvl_to_cc(u8 bc_lvl) -{ - if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_1230_MAX) - return TYPEC_CC_RP_3_0; - if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_600_1230) - return TYPEC_CC_RP_1_5; - if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_200_600) - return TYPEC_CC_RP_DEF; - return TYPEC_CC_OPEN; -} - -static void fusb302_bc_lvl_handler_work(struct work_struct *work) -{ - struct fusb302_chip *chip = container_of(work, struct fusb302_chip, - bc_lvl_handler.work); - int ret = 0; - u8 status0; - u8 bc_lvl; - enum typec_cc_status cc_status; - - mutex_lock(&chip->lock); - if (!chip->intr_bc_lvl) { - fusb302_log(chip, "BC_LVL interrupt is turned off, abort"); - goto done; - } - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); - if (ret < 0) - goto done; - fusb302_log(chip, "BC_LVL handler, status0=0x%02x", status0); - if (status0 & FUSB_REG_STATUS0_ACTIVITY) { - fusb302_log(chip, "CC activities detected, delay handling"); - mod_delayed_work(chip->wq, &chip->bc_lvl_handler, - msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS)); - goto done; - } - bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK; - cc_status = fusb302_bc_lvl_to_cc(bc_lvl); - if (chip->cc_polarity == TYPEC_POLARITY_CC1) { - if (chip->cc1 != cc_status) { - fusb302_log(chip, "cc1: %s -> %s", - typec_cc_status_name[chip->cc1], - typec_cc_status_name[cc_status]); - chip->cc1 = cc_status; - tcpm_cc_change(chip->tcpm_port); - } - } else { - if (chip->cc2 != cc_status) { - fusb302_log(chip, "cc2: %s -> %s", - typec_cc_status_name[chip->cc2], - typec_cc_status_name[cc_status]); - chip->cc2 = cc_status; - tcpm_cc_change(chip->tcpm_port); - } - } - -done: - mutex_unlock(&chip->lock); -} - -#define PDO_FIXED_FLAGS \ - (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM) - -static const u32 src_pdo[] = { - PDO_FIXED(5000, 400, PDO_FIXED_FLAGS), -}; - -static const struct tcpc_config fusb302_tcpc_config = { - .src_pdo = src_pdo, - .nr_src_pdo = ARRAY_SIZE(src_pdo), - .operating_snk_mw = 2500, - .type = TYPEC_PORT_DRP, - .data = TYPEC_PORT_DRD, - .default_role = TYPEC_SINK, - .alt_modes = NULL, -}; - -static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev) -{ - fusb302_tcpc_dev->init = tcpm_init; - fusb302_tcpc_dev->get_vbus = tcpm_get_vbus; - fusb302_tcpc_dev->get_current_limit = tcpm_get_current_limit; - fusb302_tcpc_dev->set_cc = tcpm_set_cc; - fusb302_tcpc_dev->get_cc = tcpm_get_cc; - fusb302_tcpc_dev->set_polarity = tcpm_set_polarity; - fusb302_tcpc_dev->set_vconn = tcpm_set_vconn; - fusb302_tcpc_dev->set_vbus = tcpm_set_vbus; - fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx; - fusb302_tcpc_dev->set_roles = tcpm_set_roles; - fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling; - fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit; -} - -static const char * const cc_polarity_name[] = { - [TYPEC_POLARITY_CC1] = "Polarity_CC1", - [TYPEC_POLARITY_CC2] = "Polarity_CC2", -}; - -static int fusb302_set_cc_polarity(struct fusb302_chip *chip, - enum typec_cc_polarity cc_polarity) -{ - int ret = 0; - u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN | - FUSB_REG_SWITCHES0_CC2_PU_EN | - FUSB_REG_SWITCHES0_VCONN_CC1 | - FUSB_REG_SWITCHES0_VCONN_CC2 | - FUSB_REG_SWITCHES0_MEAS_CC1 | - FUSB_REG_SWITCHES0_MEAS_CC2; - u8 switches0_data = 0x00; - u8 switches1_mask = FUSB_REG_SWITCHES1_TXCC1_EN | - FUSB_REG_SWITCHES1_TXCC2_EN; - u8 switches1_data = 0x00; - - if (cc_polarity == TYPEC_POLARITY_CC1) { - switches0_data = FUSB_REG_SWITCHES0_MEAS_CC1; - if (chip->vconn_on) - switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC2; - if (chip->pull_up) - switches0_data |= FUSB_REG_SWITCHES0_CC1_PU_EN; - switches1_data = FUSB_REG_SWITCHES1_TXCC1_EN; - } else { - switches0_data = FUSB_REG_SWITCHES0_MEAS_CC2; - if (chip->vconn_on) - switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC1; - if (chip->pull_up) - switches0_data |= FUSB_REG_SWITCHES0_CC2_PU_EN; - switches1_data = FUSB_REG_SWITCHES1_TXCC2_EN; - } - ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, - switches0_mask, switches0_data); - if (ret < 0) - return ret; - ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1, - switches1_mask, switches1_data); - if (ret < 0) - return ret; - chip->cc_polarity = cc_polarity; - - return ret; -} - -static int fusb302_handle_togdone_snk(struct fusb302_chip *chip, - u8 togdone_result) -{ - int ret = 0; - u8 status0; - u8 bc_lvl; - enum typec_cc_polarity cc_polarity; - enum typec_cc_status cc_status_active, cc1, cc2; - - /* set pull_up, pull_down */ - ret = fusb302_set_cc_pull(chip, false, true); - if (ret < 0) { - fusb302_log(chip, "cannot set cc to pull down, ret=%d", ret); - return ret; - } - /* set polarity */ - cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SNK1) ? - TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2; - ret = fusb302_set_cc_polarity(chip, cc_polarity); - if (ret < 0) { - fusb302_log(chip, "cannot set cc polarity %s, ret=%d", - cc_polarity_name[cc_polarity], ret); - return ret; - } - /* fusb302_set_cc_polarity() has set the correct measure block */ - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); - if (ret < 0) - return ret; - bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK; - cc_status_active = fusb302_bc_lvl_to_cc(bc_lvl); - /* restart toggling if the cc status on the active line is OPEN */ - if (cc_status_active == TYPEC_CC_OPEN) { - fusb302_log(chip, "restart toggling as CC_OPEN detected"); - ret = fusb302_set_toggling(chip, chip->toggling_mode); - return ret; - } - /* update tcpm with the new cc value */ - cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ? - cc_status_active : TYPEC_CC_OPEN; - cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ? - cc_status_active : TYPEC_CC_OPEN; - if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) { - chip->cc1 = cc1; - chip->cc2 = cc2; - tcpm_cc_change(chip->tcpm_port); - } - /* turn off toggling */ - ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF); - if (ret < 0) { - fusb302_log(chip, - "cannot set toggling mode off, ret=%d", ret); - return ret; - } - /* unmask bc_lvl interrupt */ - ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, FUSB_REG_MASK_BC_LVL); - if (ret < 0) { - fusb302_log(chip, - "cannot unmask bc_lcl interrupt, ret=%d", ret); - return ret; - } - chip->intr_bc_lvl = true; - fusb302_log(chip, "detected cc1=%s, cc2=%s", - typec_cc_status_name[cc1], - typec_cc_status_name[cc2]); - - return ret; -} - -static int fusb302_handle_togdone_src(struct fusb302_chip *chip, - u8 togdone_result) -{ - /* - * - set polarity (measure cc, vconn, tx) - * - set pull_up, pull_down - * - set cc1, cc2, and update to tcpm_port - * - set I_COMP interrupt on - */ - int ret = 0; - u8 status0; - u8 ra_mda = ra_mda_value[chip->src_current_status]; - u8 rd_mda = rd_mda_value[chip->src_current_status]; - bool ra_comp, rd_comp; - enum typec_cc_polarity cc_polarity; - enum typec_cc_status cc_status_active, cc1, cc2; - - /* set pull_up, pull_down */ - ret = fusb302_set_cc_pull(chip, true, false); - if (ret < 0) { - fusb302_log(chip, "cannot set cc to pull up, ret=%d", ret); - return ret; - } - /* set polarity */ - cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) ? - TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2; - ret = fusb302_set_cc_polarity(chip, cc_polarity); - if (ret < 0) { - fusb302_log(chip, "cannot set cc polarity %s, ret=%d", - cc_polarity_name[cc_polarity], ret); - return ret; - } - /* fusb302_set_cc_polarity() has set the correct measure block */ - ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); - if (ret < 0) - return ret; - usleep_range(50, 100); - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); - if (ret < 0) - return ret; - rd_comp = !!(status0 & FUSB_REG_STATUS0_COMP); - if (!rd_comp) { - ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda); - if (ret < 0) - return ret; - usleep_range(50, 100); - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); - if (ret < 0) - return ret; - ra_comp = !!(status0 & FUSB_REG_STATUS0_COMP); - } - if (rd_comp) - cc_status_active = TYPEC_CC_OPEN; - else if (ra_comp) - cc_status_active = TYPEC_CC_RD; - else - /* Ra is not supported, report as Open */ - cc_status_active = TYPEC_CC_OPEN; - /* restart toggling if the cc status on the active line is OPEN */ - if (cc_status_active == TYPEC_CC_OPEN) { - fusb302_log(chip, "restart toggling as CC_OPEN detected"); - ret = fusb302_set_toggling(chip, chip->toggling_mode); - return ret; - } - /* update tcpm with the new cc value */ - cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ? - cc_status_active : TYPEC_CC_OPEN; - cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ? - cc_status_active : TYPEC_CC_OPEN; - if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) { - chip->cc1 = cc1; - chip->cc2 = cc2; - tcpm_cc_change(chip->tcpm_port); - } - /* turn off toggling */ - ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF); - if (ret < 0) { - fusb302_log(chip, - "cannot set toggling mode off, ret=%d", ret); - return ret; - } - /* set MDAC to Rd threshold, and unmask I_COMP for unplug detection */ - ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); - if (ret < 0) - return ret; - /* unmask comp_chng interrupt */ - ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, - FUSB_REG_MASK_COMP_CHNG); - if (ret < 0) { - fusb302_log(chip, - "cannot unmask bc_lcl interrupt, ret=%d", ret); - return ret; - } - chip->intr_comp_chng = true; - fusb302_log(chip, "detected cc1=%s, cc2=%s", - typec_cc_status_name[cc1], - typec_cc_status_name[cc2]); - - return ret; -} - -static int fusb302_handle_togdone(struct fusb302_chip *chip) -{ - int ret = 0; - u8 status1a; - u8 togdone_result; - - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS1A, &status1a); - if (ret < 0) - return ret; - togdone_result = (status1a >> FUSB_REG_STATUS1A_TOGSS_POS) & - FUSB_REG_STATUS1A_TOGSS_MASK; - switch (togdone_result) { - case FUSB_REG_STATUS1A_TOGSS_SNK1: - case FUSB_REG_STATUS1A_TOGSS_SNK2: - return fusb302_handle_togdone_snk(chip, togdone_result); - case FUSB_REG_STATUS1A_TOGSS_SRC1: - case FUSB_REG_STATUS1A_TOGSS_SRC2: - return fusb302_handle_togdone_src(chip, togdone_result); - case FUSB_REG_STATUS1A_TOGSS_AA: - /* doesn't support */ - fusb302_log(chip, "AudioAccessory not supported"); - fusb302_set_toggling(chip, chip->toggling_mode); - break; - default: - fusb302_log(chip, "TOGDONE with an invalid state: %d", - togdone_result); - fusb302_set_toggling(chip, chip->toggling_mode); - break; - } - return ret; -} - -static int fusb302_pd_reset(struct fusb302_chip *chip) -{ - return fusb302_i2c_set_bits(chip, FUSB_REG_RESET, - FUSB_REG_RESET_PD_RESET); -} - -static int fusb302_pd_read_message(struct fusb302_chip *chip, - struct pd_message *msg) -{ - int ret = 0; - u8 token; - u8 crc[4]; - int len; - - /* first SOP token */ - ret = fusb302_i2c_read(chip, FUSB_REG_FIFOS, &token); - if (ret < 0) - return ret; - ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 2, - (u8 *)&msg->header); - if (ret < 0) - return ret; - len = pd_header_cnt_le(msg->header) * 4; - /* add 4 to length to include the CRC */ - if (len > PD_MAX_PAYLOAD * 4) { - fusb302_log(chip, "PD message too long %d", len); - return -EINVAL; - } - if (len > 0) { - ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, len, - (u8 *)msg->payload); - if (ret < 0) - return ret; - } - /* another 4 bytes to read CRC out */ - ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 4, crc); - if (ret < 0) - return ret; - fusb302_log(chip, "PD message header: %x", msg->header); - fusb302_log(chip, "PD message len: %d", len); - - /* - * Check if we've read off a GoodCRC message. If so then indicate to - * TCPM that the previous transmission has completed. Otherwise we pass - * the received message over to TCPM for processing. - * - * We make this check here instead of basing the reporting decision on - * the IRQ event type, as it's possible for the chip to report the - * TX_SUCCESS and GCRCSENT events out of order on occasion, so we need - * to check the message type to ensure correct reporting to TCPM. - */ - if ((!len) && (pd_header_type_le(msg->header) == PD_CTRL_GOOD_CRC)) - tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS); - else - tcpm_pd_receive(chip->tcpm_port, msg); - - return ret; -} - -static irqreturn_t fusb302_irq_intn(int irq, void *dev_id) -{ - struct fusb302_chip *chip = dev_id; - int ret = 0; - u8 interrupt; - u8 interrupta; - u8 interruptb; - u8 status0; - bool vbus_present; - bool comp_result; - bool intr_togdone; - bool intr_bc_lvl; - bool intr_comp_chng; - struct pd_message pd_msg; - - mutex_lock(&chip->lock); - /* grab a snapshot of intr flags */ - intr_togdone = chip->intr_togdone; - intr_bc_lvl = chip->intr_bc_lvl; - intr_comp_chng = chip->intr_comp_chng; - - ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPT, &interrupt); - if (ret < 0) - goto done; - ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTA, &interrupta); - if (ret < 0) - goto done; - ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTB, &interruptb); - if (ret < 0) - goto done; - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); - if (ret < 0) - goto done; - fusb302_log(chip, - "IRQ: 0x%02x, a: 0x%02x, b: 0x%02x, status0: 0x%02x", - interrupt, interrupta, interruptb, status0); - - if (interrupt & FUSB_REG_INTERRUPT_VBUSOK) { - vbus_present = !!(status0 & FUSB_REG_STATUS0_VBUSOK); - fusb302_log(chip, "IRQ: VBUS_OK, vbus=%s", - vbus_present ? "On" : "Off"); - if (vbus_present != chip->vbus_present) { - chip->vbus_present = vbus_present; - tcpm_vbus_change(chip->tcpm_port); - } - } - - if ((interrupta & FUSB_REG_INTERRUPTA_TOGDONE) && intr_togdone) { - fusb302_log(chip, "IRQ: TOGDONE"); - ret = fusb302_handle_togdone(chip); - if (ret < 0) { - fusb302_log(chip, - "handle togdone error, ret=%d", ret); - goto done; - } - } - - if ((interrupt & FUSB_REG_INTERRUPT_BC_LVL) && intr_bc_lvl) { - fusb302_log(chip, "IRQ: BC_LVL, handler pending"); - /* - * as BC_LVL interrupt can be affected by PD activity, - * apply delay to for the handler to wait for the PD - * signaling to finish. - */ - mod_delayed_work(chip->wq, &chip->bc_lvl_handler, - msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS)); - } - - if ((interrupt & FUSB_REG_INTERRUPT_COMP_CHNG) && intr_comp_chng) { - comp_result = !!(status0 & FUSB_REG_STATUS0_COMP); - fusb302_log(chip, "IRQ: COMP_CHNG, comp=%s", - comp_result ? "true" : "false"); - if (comp_result) { - /* cc level > Rd_threashold, detach */ - if (chip->cc_polarity == TYPEC_POLARITY_CC1) - chip->cc1 = TYPEC_CC_OPEN; - else - chip->cc2 = TYPEC_CC_OPEN; - tcpm_cc_change(chip->tcpm_port); - } - } - - if (interrupt & FUSB_REG_INTERRUPT_COLLISION) { - fusb302_log(chip, "IRQ: PD collision"); - tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED); - } - - if (interrupta & FUSB_REG_INTERRUPTA_RETRYFAIL) { - fusb302_log(chip, "IRQ: PD retry failed"); - tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED); - } - - if (interrupta & FUSB_REG_INTERRUPTA_HARDSENT) { - fusb302_log(chip, "IRQ: PD hardreset sent"); - ret = fusb302_pd_reset(chip); - if (ret < 0) { - fusb302_log(chip, "cannot PD reset, ret=%d", ret); - goto done; - } - tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS); - } - - if (interrupta & FUSB_REG_INTERRUPTA_TX_SUCCESS) { - fusb302_log(chip, "IRQ: PD tx success"); - ret = fusb302_pd_read_message(chip, &pd_msg); - if (ret < 0) { - fusb302_log(chip, - "cannot read in PD message, ret=%d", ret); - goto done; - } - } - - if (interrupta & FUSB_REG_INTERRUPTA_HARDRESET) { - fusb302_log(chip, "IRQ: PD received hardreset"); - ret = fusb302_pd_reset(chip); - if (ret < 0) { - fusb302_log(chip, "cannot PD reset, ret=%d", ret); - goto done; - } - tcpm_pd_hard_reset(chip->tcpm_port); - } - - if (interruptb & FUSB_REG_INTERRUPTB_GCRCSENT) { - fusb302_log(chip, "IRQ: PD sent good CRC"); - ret = fusb302_pd_read_message(chip, &pd_msg); - if (ret < 0) { - fusb302_log(chip, - "cannot read in PD message, ret=%d", ret); - goto done; - } - } -done: - mutex_unlock(&chip->lock); - - return IRQ_HANDLED; -} - -static int init_gpio(struct fusb302_chip *chip) -{ - struct device_node *node; - int ret = 0; - - node = chip->dev->of_node; - chip->gpio_int_n = of_get_named_gpio(node, "fcs,int_n", 0); - if (!gpio_is_valid(chip->gpio_int_n)) { - ret = chip->gpio_int_n; - dev_err(chip->dev, "cannot get named GPIO Int_N, ret=%d", ret); - return ret; - } - ret = devm_gpio_request(chip->dev, chip->gpio_int_n, "fcs,int_n"); - if (ret < 0) { - dev_err(chip->dev, "cannot request GPIO Int_N, ret=%d", ret); - return ret; - } - ret = gpio_direction_input(chip->gpio_int_n); - if (ret < 0) { - dev_err(chip->dev, - "cannot set GPIO Int_N to input, ret=%d", ret); - return ret; - } - ret = gpio_to_irq(chip->gpio_int_n); - if (ret < 0) { - dev_err(chip->dev, - "cannot request IRQ for GPIO Int_N, ret=%d", ret); - return ret; - } - chip->gpio_int_n_irq = ret; - return 0; -} - -static int fusb302_composite_snk_pdo_array(struct fusb302_chip *chip) -{ - struct device *dev = chip->dev; - u32 max_uv, max_ua; - - chip->snk_pdo[0] = PDO_FIXED(5000, 400, PDO_FIXED_FLAGS); - - /* - * As max_snk_ma/mv/mw is not needed for tcpc_config, - * those settings should be passed in via sink PDO, so - * "fcs, max-sink-*" properties will be deprecated, to - * perserve compatibility with existing users of them, - * we read those properties to convert them to be a var - * PDO. - */ - if (device_property_read_u32(dev, "fcs,max-sink-microvolt", &max_uv) || - device_property_read_u32(dev, "fcs,max-sink-microamp", &max_ua)) - return 1; - - chip->snk_pdo[1] = PDO_VAR(5000, max_uv / 1000, max_ua / 1000); - return 2; -} - -static int fusb302_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct fusb302_chip *chip; - struct i2c_adapter *adapter; - struct device *dev = &client->dev; - const char *name; - int ret = 0; - u32 v; - - adapter = to_i2c_adapter(client->dev.parent); - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { - dev_err(&client->dev, - "I2C/SMBus block functionality not supported!\n"); - return -ENODEV; - } - chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); - if (!chip) - return -ENOMEM; - - chip->i2c_client = client; - chip->dev = &client->dev; - chip->tcpc_config = fusb302_tcpc_config; - chip->tcpc_dev.config = &chip->tcpc_config; - mutex_init(&chip->lock); - - chip->tcpc_dev.fwnode = - device_get_named_child_node(dev, "connector"); - - if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v)) - chip->tcpc_config.operating_snk_mw = v / 1000; - - /* Composite sink PDO */ - chip->tcpc_config.nr_snk_pdo = fusb302_composite_snk_pdo_array(chip); - chip->tcpc_config.snk_pdo = chip->snk_pdo; - - /* - * Devicetree platforms should get extcon via phandle (not yet - * supported). On ACPI platforms, we get the name from a device prop. - * This device prop is for kernel internal use only and is expected - * to be set by the platform code which also registers the i2c client - * for the fusb302. - */ - if (device_property_read_string(dev, "fcs,extcon-name", &name) == 0) { - chip->extcon = extcon_get_extcon_dev(name); - if (!chip->extcon) - return -EPROBE_DEFER; - } - - chip->vbus = devm_regulator_get(chip->dev, "vbus"); - if (IS_ERR(chip->vbus)) - return PTR_ERR(chip->vbus); - - chip->wq = create_singlethread_workqueue(dev_name(chip->dev)); - if (!chip->wq) - return -ENOMEM; - - INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work); - init_tcpc_dev(&chip->tcpc_dev); - - if (client->irq) { - chip->gpio_int_n_irq = client->irq; - } else { - ret = init_gpio(chip); - if (ret < 0) - goto destroy_workqueue; - } - - chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev); - if (IS_ERR(chip->tcpm_port)) { - ret = PTR_ERR(chip->tcpm_port); - if (ret != -EPROBE_DEFER) - dev_err(dev, "cannot register tcpm port, ret=%d", ret); - goto destroy_workqueue; - } - - ret = devm_request_threaded_irq(chip->dev, chip->gpio_int_n_irq, - NULL, fusb302_irq_intn, - IRQF_ONESHOT | IRQF_TRIGGER_LOW, - "fsc_interrupt_int_n", chip); - if (ret < 0) { - dev_err(dev, "cannot request IRQ for GPIO Int_N, ret=%d", ret); - goto tcpm_unregister_port; - } - enable_irq_wake(chip->gpio_int_n_irq); - fusb302_debugfs_init(chip); - i2c_set_clientdata(client, chip); - - return ret; - -tcpm_unregister_port: - tcpm_unregister_port(chip->tcpm_port); -destroy_workqueue: - destroy_workqueue(chip->wq); - - return ret; -} - -static int fusb302_remove(struct i2c_client *client) -{ - struct fusb302_chip *chip = i2c_get_clientdata(client); - - tcpm_unregister_port(chip->tcpm_port); - destroy_workqueue(chip->wq); - fusb302_debugfs_exit(chip); - - return 0; -} - -static int fusb302_pm_suspend(struct device *dev) -{ - struct fusb302_chip *chip = dev->driver_data; - - if (atomic_read(&chip->i2c_busy)) - return -EBUSY; - atomic_set(&chip->pm_suspend, 1); - - return 0; -} - -static int fusb302_pm_resume(struct device *dev) -{ - struct fusb302_chip *chip = dev->driver_data; - - atomic_set(&chip->pm_suspend, 0); - - return 0; -} - -static const struct of_device_id fusb302_dt_match[] = { - {.compatible = "fcs,fusb302"}, - {}, -}; -MODULE_DEVICE_TABLE(of, fusb302_dt_match); - -static const struct i2c_device_id fusb302_i2c_device_id[] = { - {"typec_fusb302", 0}, - {}, -}; -MODULE_DEVICE_TABLE(i2c, fusb302_i2c_device_id); - -static const struct dev_pm_ops fusb302_pm_ops = { - .suspend = fusb302_pm_suspend, - .resume = fusb302_pm_resume, -}; - -static struct i2c_driver fusb302_driver = { - .driver = { - .name = "typec_fusb302", - .pm = &fusb302_pm_ops, - .of_match_table = of_match_ptr(fusb302_dt_match), - }, - .probe = fusb302_probe, - .remove = fusb302_remove, - .id_table = fusb302_i2c_device_id, -}; -module_i2c_driver(fusb302_driver); - -MODULE_AUTHOR("Yueyao Zhu "); -MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/fusb302/fusb302_reg.h b/drivers/usb/typec/fusb302/fusb302_reg.h deleted file mode 100644 index 00b39d365478..000000000000 --- a/drivers/usb/typec/fusb302/fusb302_reg.h +++ /dev/null @@ -1,177 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright 2016-2017 Google, Inc - * - * Fairchild FUSB302 Type-C Chip Driver - */ - -#ifndef FUSB302_REG_H -#define FUSB302_REG_H - -#define FUSB_REG_DEVICE_ID 0x01 -#define FUSB_REG_SWITCHES0 0x02 -#define FUSB_REG_SWITCHES0_CC2_PU_EN BIT(7) -#define FUSB_REG_SWITCHES0_CC1_PU_EN BIT(6) -#define FUSB_REG_SWITCHES0_VCONN_CC2 BIT(5) -#define FUSB_REG_SWITCHES0_VCONN_CC1 BIT(4) -#define FUSB_REG_SWITCHES0_MEAS_CC2 BIT(3) -#define FUSB_REG_SWITCHES0_MEAS_CC1 BIT(2) -#define FUSB_REG_SWITCHES0_CC2_PD_EN BIT(1) -#define FUSB_REG_SWITCHES0_CC1_PD_EN BIT(0) -#define FUSB_REG_SWITCHES1 0x03 -#define FUSB_REG_SWITCHES1_POWERROLE BIT(7) -#define FUSB_REG_SWITCHES1_SPECREV1 BIT(6) -#define FUSB_REG_SWITCHES1_SPECREV0 BIT(5) -#define FUSB_REG_SWITCHES1_DATAROLE BIT(4) -#define FUSB_REG_SWITCHES1_AUTO_GCRC BIT(2) -#define FUSB_REG_SWITCHES1_TXCC2_EN BIT(1) -#define FUSB_REG_SWITCHES1_TXCC1_EN BIT(0) -#define FUSB_REG_MEASURE 0x04 -#define FUSB_REG_MEASURE_MDAC5 BIT(7) -#define FUSB_REG_MEASURE_MDAC4 BIT(6) -#define FUSB_REG_MEASURE_MDAC3 BIT(5) -#define FUSB_REG_MEASURE_MDAC2 BIT(4) -#define FUSB_REG_MEASURE_MDAC1 BIT(3) -#define FUSB_REG_MEASURE_MDAC0 BIT(2) -#define FUSB_REG_MEASURE_VBUS BIT(1) -#define FUSB_REG_MEASURE_XXXX5 BIT(0) -#define FUSB_REG_CONTROL0 0x06 -#define FUSB_REG_CONTROL0_TX_FLUSH BIT(6) -#define FUSB_REG_CONTROL0_INT_MASK BIT(5) -#define FUSB_REG_CONTROL0_HOST_CUR_MASK (0xC) -#define FUSB_REG_CONTROL0_HOST_CUR_HIGH (0xC) -#define FUSB_REG_CONTROL0_HOST_CUR_MED (0x8) -#define FUSB_REG_CONTROL0_HOST_CUR_DEF (0x4) -#define FUSB_REG_CONTROL0_TX_START BIT(0) -#define FUSB_REG_CONTROL1 0x07 -#define FUSB_REG_CONTROL1_ENSOP2DB BIT(6) -#define FUSB_REG_CONTROL1_ENSOP1DB BIT(5) -#define FUSB_REG_CONTROL1_BIST_MODE2 BIT(4) -#define FUSB_REG_CONTROL1_RX_FLUSH BIT(2) -#define FUSB_REG_CONTROL1_ENSOP2 BIT(1) -#define FUSB_REG_CONTROL1_ENSOP1 BIT(0) -#define FUSB_REG_CONTROL2 0x08 -#define FUSB_REG_CONTROL2_MODE BIT(1) -#define FUSB_REG_CONTROL2_MODE_MASK (0x6) -#define FUSB_REG_CONTROL2_MODE_DFP (0x6) -#define FUSB_REG_CONTROL2_MODE_UFP (0x4) -#define FUSB_REG_CONTROL2_MODE_DRP (0x2) -#define FUSB_REG_CONTROL2_MODE_NONE (0x0) -#define FUSB_REG_CONTROL2_TOGGLE BIT(0) -#define FUSB_REG_CONTROL3 0x09 -#define FUSB_REG_CONTROL3_SEND_HARDRESET BIT(6) -#define FUSB_REG_CONTROL3_BIST_TMODE BIT(5) /* 302B Only */ -#define FUSB_REG_CONTROL3_AUTO_HARDRESET BIT(4) -#define FUSB_REG_CONTROL3_AUTO_SOFTRESET BIT(3) -#define FUSB_REG_CONTROL3_N_RETRIES BIT(1) -#define FUSB_REG_CONTROL3_N_RETRIES_MASK (0x6) -#define FUSB_REG_CONTROL3_N_RETRIES_3 (0x6) -#define FUSB_REG_CONTROL3_N_RETRIES_2 (0x4) -#define FUSB_REG_CONTROL3_N_RETRIES_1 (0x2) -#define FUSB_REG_CONTROL3_AUTO_RETRY BIT(0) -#define FUSB_REG_MASK 0x0A -#define FUSB_REG_MASK_VBUSOK BIT(7) -#define FUSB_REG_MASK_ACTIVITY BIT(6) -#define FUSB_REG_MASK_COMP_CHNG BIT(5) -#define FUSB_REG_MASK_CRC_CHK BIT(4) -#define FUSB_REG_MASK_ALERT BIT(3) -#define FUSB_REG_MASK_WAKE BIT(2) -#define FUSB_REG_MASK_COLLISION BIT(1) -#define FUSB_REG_MASK_BC_LVL BIT(0) -#define FUSB_REG_POWER 0x0B -#define FUSB_REG_POWER_PWR BIT(0) -#define FUSB_REG_POWER_PWR_LOW 0x1 -#define FUSB_REG_POWER_PWR_MEDIUM 0x3 -#define FUSB_REG_POWER_PWR_HIGH 0x7 -#define FUSB_REG_POWER_PWR_ALL 0xF -#define FUSB_REG_RESET 0x0C -#define FUSB_REG_RESET_PD_RESET BIT(1) -#define FUSB_REG_RESET_SW_RESET BIT(0) -#define FUSB_REG_MASKA 0x0E -#define FUSB_REG_MASKA_OCP_TEMP BIT(7) -#define FUSB_REG_MASKA_TOGDONE BIT(6) -#define FUSB_REG_MASKA_SOFTFAIL BIT(5) -#define FUSB_REG_MASKA_RETRYFAIL BIT(4) -#define FUSB_REG_MASKA_HARDSENT BIT(3) -#define FUSB_REG_MASKA_TX_SUCCESS BIT(2) -#define FUSB_REG_MASKA_SOFTRESET BIT(1) -#define FUSB_REG_MASKA_HARDRESET BIT(0) -#define FUSB_REG_MASKB 0x0F -#define FUSB_REG_MASKB_GCRCSENT BIT(0) -#define FUSB_REG_STATUS0A 0x3C -#define FUSB_REG_STATUS0A_SOFTFAIL BIT(5) -#define FUSB_REG_STATUS0A_RETRYFAIL BIT(4) -#define FUSB_REG_STATUS0A_POWER BIT(2) -#define FUSB_REG_STATUS0A_RX_SOFT_RESET BIT(1) -#define FUSB_REG_STATUS0A_RX_HARD_RESET BIT(0) -#define FUSB_REG_STATUS1A 0x3D -#define FUSB_REG_STATUS1A_TOGSS BIT(3) -#define FUSB_REG_STATUS1A_TOGSS_RUNNING 0x0 -#define FUSB_REG_STATUS1A_TOGSS_SRC1 0x1 -#define FUSB_REG_STATUS1A_TOGSS_SRC2 0x2 -#define FUSB_REG_STATUS1A_TOGSS_SNK1 0x5 -#define FUSB_REG_STATUS1A_TOGSS_SNK2 0x6 -#define FUSB_REG_STATUS1A_TOGSS_AA 0x7 -#define FUSB_REG_STATUS1A_TOGSS_POS (3) -#define FUSB_REG_STATUS1A_TOGSS_MASK (0x7) -#define FUSB_REG_STATUS1A_RXSOP2DB BIT(2) -#define FUSB_REG_STATUS1A_RXSOP1DB BIT(1) -#define FUSB_REG_STATUS1A_RXSOP BIT(0) -#define FUSB_REG_INTERRUPTA 0x3E -#define FUSB_REG_INTERRUPTA_OCP_TEMP BIT(7) -#define FUSB_REG_INTERRUPTA_TOGDONE BIT(6) -#define FUSB_REG_INTERRUPTA_SOFTFAIL BIT(5) -#define FUSB_REG_INTERRUPTA_RETRYFAIL BIT(4) -#define FUSB_REG_INTERRUPTA_HARDSENT BIT(3) -#define FUSB_REG_INTERRUPTA_TX_SUCCESS BIT(2) -#define FUSB_REG_INTERRUPTA_SOFTRESET BIT(1) -#define FUSB_REG_INTERRUPTA_HARDRESET BIT(0) -#define FUSB_REG_INTERRUPTB 0x3F -#define FUSB_REG_INTERRUPTB_GCRCSENT BIT(0) -#define FUSB_REG_STATUS0 0x40 -#define FUSB_REG_STATUS0_VBUSOK BIT(7) -#define FUSB_REG_STATUS0_ACTIVITY BIT(6) -#define FUSB_REG_STATUS0_COMP BIT(5) -#define FUSB_REG_STATUS0_CRC_CHK BIT(4) -#define FUSB_REG_STATUS0_ALERT BIT(3) -#define FUSB_REG_STATUS0_WAKE BIT(2) -#define FUSB_REG_STATUS0_BC_LVL_MASK 0x03 -#define FUSB_REG_STATUS0_BC_LVL_0_200 0x0 -#define FUSB_REG_STATUS0_BC_LVL_200_600 0x1 -#define FUSB_REG_STATUS0_BC_LVL_600_1230 0x2 -#define FUSB_REG_STATUS0_BC_LVL_1230_MAX 0x3 -#define FUSB_REG_STATUS0_BC_LVL1 BIT(1) -#define FUSB_REG_STATUS0_BC_LVL0 BIT(0) -#define FUSB_REG_STATUS1 0x41 -#define FUSB_REG_STATUS1_RXSOP2 BIT(7) -#define FUSB_REG_STATUS1_RXSOP1 BIT(6) -#define FUSB_REG_STATUS1_RX_EMPTY BIT(5) -#define FUSB_REG_STATUS1_RX_FULL BIT(4) -#define FUSB_REG_STATUS1_TX_EMPTY BIT(3) -#define FUSB_REG_STATUS1_TX_FULL BIT(2) -#define FUSB_REG_INTERRUPT 0x42 -#define FUSB_REG_INTERRUPT_VBUSOK BIT(7) -#define FUSB_REG_INTERRUPT_ACTIVITY BIT(6) -#define FUSB_REG_INTERRUPT_COMP_CHNG BIT(5) -#define FUSB_REG_INTERRUPT_CRC_CHK BIT(4) -#define FUSB_REG_INTERRUPT_ALERT BIT(3) -#define FUSB_REG_INTERRUPT_WAKE BIT(2) -#define FUSB_REG_INTERRUPT_COLLISION BIT(1) -#define FUSB_REG_INTERRUPT_BC_LVL BIT(0) -#define FUSB_REG_FIFOS 0x43 - -/* Tokens defined for the FUSB302 TX FIFO */ -enum fusb302_txfifo_tokens { - FUSB302_TKN_TXON = 0xA1, - FUSB302_TKN_SYNC1 = 0x12, - FUSB302_TKN_SYNC2 = 0x13, - FUSB302_TKN_SYNC3 = 0x1B, - FUSB302_TKN_RST1 = 0x15, - FUSB302_TKN_RST2 = 0x16, - FUSB302_TKN_PACKSYM = 0x80, - FUSB302_TKN_JAMCRC = 0xFF, - FUSB302_TKN_EOP = 0x14, - FUSB302_TKN_TXOFF = 0xFE, -}; - -#endif diff --git a/drivers/usb/typec/tcpci.c b/drivers/usb/typec/tcpci.c deleted file mode 100644 index ac6b418b15f1..000000000000 --- a/drivers/usb/typec/tcpci.c +++ /dev/null @@ -1,612 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright 2015-2017 Google, Inc - * - * USB Type-C Port Controller Interface. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "tcpci.h" - -#define PD_RETRY_COUNT 3 - -struct tcpci { - struct device *dev; - - struct tcpm_port *port; - - struct regmap *regmap; - - bool controls_vbus; - - struct tcpc_dev tcpc; - struct tcpci_data *data; -}; - -struct tcpci_chip { - struct tcpci *tcpci; - struct tcpci_data data; -}; - -static inline struct tcpci *tcpc_to_tcpci(struct tcpc_dev *tcpc) -{ - return container_of(tcpc, struct tcpci, tcpc); -} - -static int tcpci_read16(struct tcpci *tcpci, unsigned int reg, u16 *val) -{ - return regmap_raw_read(tcpci->regmap, reg, val, sizeof(u16)); -} - -static int tcpci_write16(struct tcpci *tcpci, unsigned int reg, u16 val) -{ - return regmap_raw_write(tcpci->regmap, reg, &val, sizeof(u16)); -} - -static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - unsigned int reg; - int ret; - - switch (cc) { - case TYPEC_CC_RA: - reg = (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC2_SHIFT); - break; - case TYPEC_CC_RD: - reg = (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT); - break; - case TYPEC_CC_RP_DEF: - reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) | - (TCPC_ROLE_CTRL_RP_VAL_DEF << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - case TYPEC_CC_RP_1_5: - reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) | - (TCPC_ROLE_CTRL_RP_VAL_1_5 << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - case TYPEC_CC_RP_3_0: - reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) | - (TCPC_ROLE_CTRL_RP_VAL_3_0 << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - case TYPEC_CC_OPEN: - default: - reg = (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT); - break; - } - - ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg); - if (ret < 0) - return ret; - - return 0; -} - -static int tcpci_start_drp_toggling(struct tcpc_dev *tcpc, - enum typec_cc_status cc) -{ - int ret; - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - unsigned int reg = TCPC_ROLE_CTRL_DRP; - - /* Handle vendor drp toggling */ - if (tcpci->data->start_drp_toggling) { - ret = tcpci->data->start_drp_toggling(tcpci, tcpci->data, cc); - if (ret < 0) - return ret; - } - - switch (cc) { - default: - case TYPEC_CC_RP_DEF: - reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - case TYPEC_CC_RP_1_5: - reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - case TYPEC_CC_RP_3_0: - reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - } - - if (cc == TYPEC_CC_RD) - reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT); - else - reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT); - ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg); - if (ret < 0) - return ret; - return regmap_write(tcpci->regmap, TCPC_COMMAND, - TCPC_CMD_LOOK4CONNECTION); -} - -static enum typec_cc_status tcpci_to_typec_cc(unsigned int cc, bool sink) -{ - switch (cc) { - case 0x1: - return sink ? TYPEC_CC_RP_DEF : TYPEC_CC_RA; - case 0x2: - return sink ? TYPEC_CC_RP_1_5 : TYPEC_CC_RD; - case 0x3: - if (sink) - return TYPEC_CC_RP_3_0; - /* fall through */ - case 0x0: - default: - return TYPEC_CC_OPEN; - } -} - -static int tcpci_get_cc(struct tcpc_dev *tcpc, - enum typec_cc_status *cc1, enum typec_cc_status *cc2) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - unsigned int reg; - int ret; - - ret = regmap_read(tcpci->regmap, TCPC_CC_STATUS, ®); - if (ret < 0) - return ret; - - *cc1 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC1_SHIFT) & - TCPC_CC_STATUS_CC1_MASK, - reg & TCPC_CC_STATUS_TERM); - *cc2 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC2_SHIFT) & - TCPC_CC_STATUS_CC2_MASK, - reg & TCPC_CC_STATUS_TERM); - - return 0; -} - -static int tcpci_set_polarity(struct tcpc_dev *tcpc, - enum typec_cc_polarity polarity) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - unsigned int reg; - int ret; - - /* Keep the disconnect cc line open */ - ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, ®); - if (ret < 0) - return ret; - - if (polarity == TYPEC_POLARITY_CC2) - reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT; - else - reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT; - ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg); - if (ret < 0) - return ret; - - return regmap_write(tcpci->regmap, TCPC_TCPC_CTRL, - (polarity == TYPEC_POLARITY_CC2) ? - TCPC_TCPC_CTRL_ORIENTATION : 0); -} - -static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - int ret; - - /* Handle vendor set vconn */ - if (tcpci->data->set_vconn) { - ret = tcpci->data->set_vconn(tcpci, tcpci->data, enable); - if (ret < 0) - return ret; - } - - return regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL, - TCPC_POWER_CTRL_VCONN_ENABLE, - enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0); -} - -static int tcpci_set_roles(struct tcpc_dev *tcpc, bool attached, - enum typec_role role, enum typec_data_role data) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - unsigned int reg; - int ret; - - reg = PD_REV20 << TCPC_MSG_HDR_INFO_REV_SHIFT; - if (role == TYPEC_SOURCE) - reg |= TCPC_MSG_HDR_INFO_PWR_ROLE; - if (data == TYPEC_HOST) - reg |= TCPC_MSG_HDR_INFO_DATA_ROLE; - ret = regmap_write(tcpci->regmap, TCPC_MSG_HDR_INFO, reg); - if (ret < 0) - return ret; - - return 0; -} - -static int tcpci_set_pd_rx(struct tcpc_dev *tcpc, bool enable) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - unsigned int reg = 0; - int ret; - - if (enable) - reg = TCPC_RX_DETECT_SOP | TCPC_RX_DETECT_HARD_RESET; - ret = regmap_write(tcpci->regmap, TCPC_RX_DETECT, reg); - if (ret < 0) - return ret; - - return 0; -} - -static int tcpci_get_vbus(struct tcpc_dev *tcpc) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - unsigned int reg; - int ret; - - ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, ®); - if (ret < 0) - return ret; - - return !!(reg & TCPC_POWER_STATUS_VBUS_PRES); -} - -static int tcpci_set_vbus(struct tcpc_dev *tcpc, bool source, bool sink) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - int ret; - - /* Disable both source and sink first before enabling anything */ - - if (!source) { - ret = regmap_write(tcpci->regmap, TCPC_COMMAND, - TCPC_CMD_DISABLE_SRC_VBUS); - if (ret < 0) - return ret; - } - - if (!sink) { - ret = regmap_write(tcpci->regmap, TCPC_COMMAND, - TCPC_CMD_DISABLE_SINK_VBUS); - if (ret < 0) - return ret; - } - - if (source) { - ret = regmap_write(tcpci->regmap, TCPC_COMMAND, - TCPC_CMD_SRC_VBUS_DEFAULT); - if (ret < 0) - return ret; - } - - if (sink) { - ret = regmap_write(tcpci->regmap, TCPC_COMMAND, - TCPC_CMD_SINK_VBUS); - if (ret < 0) - return ret; - } - - return 0; -} - -static int tcpci_pd_transmit(struct tcpc_dev *tcpc, - enum tcpm_transmit_type type, - const struct pd_message *msg) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - u16 header = msg ? le16_to_cpu(msg->header) : 0; - unsigned int reg, cnt; - int ret; - - cnt = msg ? pd_header_cnt(header) * 4 : 0; - ret = regmap_write(tcpci->regmap, TCPC_TX_BYTE_CNT, cnt + 2); - if (ret < 0) - return ret; - - ret = tcpci_write16(tcpci, TCPC_TX_HDR, header); - if (ret < 0) - return ret; - - if (cnt > 0) { - ret = regmap_raw_write(tcpci->regmap, TCPC_TX_DATA, - &msg->payload, cnt); - if (ret < 0) - return ret; - } - - reg = (PD_RETRY_COUNT << TCPC_TRANSMIT_RETRY_SHIFT) | - (type << TCPC_TRANSMIT_TYPE_SHIFT); - ret = regmap_write(tcpci->regmap, TCPC_TRANSMIT, reg); - if (ret < 0) - return ret; - - return 0; -} - -static int tcpci_init(struct tcpc_dev *tcpc) -{ - struct tcpci *tcpci = tcpc_to_tcpci(tcpc); - unsigned long timeout = jiffies + msecs_to_jiffies(2000); /* XXX */ - unsigned int reg; - int ret; - - while (time_before_eq(jiffies, timeout)) { - ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, ®); - if (ret < 0) - return ret; - if (!(reg & TCPC_POWER_STATUS_UNINIT)) - break; - usleep_range(10000, 20000); - } - if (time_after(jiffies, timeout)) - return -ETIMEDOUT; - - /* Handle vendor init */ - if (tcpci->data->init) { - ret = tcpci->data->init(tcpci, tcpci->data); - if (ret < 0) - return ret; - } - - /* Clear all events */ - ret = tcpci_write16(tcpci, TCPC_ALERT, 0xffff); - if (ret < 0) - return ret; - - if (tcpci->controls_vbus) - reg = TCPC_POWER_STATUS_VBUS_PRES; - else - reg = 0; - ret = regmap_write(tcpci->regmap, TCPC_POWER_STATUS_MASK, reg); - if (ret < 0) - return ret; - - /* Enable Vbus detection */ - ret = regmap_write(tcpci->regmap, TCPC_COMMAND, - TCPC_CMD_ENABLE_VBUS_DETECT); - if (ret < 0) - return ret; - - reg = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_FAILED | - TCPC_ALERT_TX_DISCARDED | TCPC_ALERT_RX_STATUS | - TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_CC_STATUS; - if (tcpci->controls_vbus) - reg |= TCPC_ALERT_POWER_STATUS; - return tcpci_write16(tcpci, TCPC_ALERT_MASK, reg); -} - -irqreturn_t tcpci_irq(struct tcpci *tcpci) -{ - u16 status; - - tcpci_read16(tcpci, TCPC_ALERT, &status); - - /* - * Clear alert status for everything except RX_STATUS, which shouldn't - * be cleared until we have successfully retrieved message. - */ - if (status & ~TCPC_ALERT_RX_STATUS) - tcpci_write16(tcpci, TCPC_ALERT, - status & ~TCPC_ALERT_RX_STATUS); - - if (status & TCPC_ALERT_CC_STATUS) - tcpm_cc_change(tcpci->port); - - if (status & TCPC_ALERT_POWER_STATUS) { - unsigned int reg; - - regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, ®); - - /* - * If power status mask has been reset, then the TCPC - * has reset. - */ - if (reg == 0xff) - tcpm_tcpc_reset(tcpci->port); - else - tcpm_vbus_change(tcpci->port); - } - - if (status & TCPC_ALERT_RX_STATUS) { - struct pd_message msg; - unsigned int cnt; - u16 header; - - regmap_read(tcpci->regmap, TCPC_RX_BYTE_CNT, &cnt); - - tcpci_read16(tcpci, TCPC_RX_HDR, &header); - msg.header = cpu_to_le16(header); - - if (WARN_ON(cnt > sizeof(msg.payload))) - cnt = sizeof(msg.payload); - - if (cnt > 0) - regmap_raw_read(tcpci->regmap, TCPC_RX_DATA, - &msg.payload, cnt); - - /* Read complete, clear RX status alert bit */ - tcpci_write16(tcpci, TCPC_ALERT, TCPC_ALERT_RX_STATUS); - - tcpm_pd_receive(tcpci->port, &msg); - } - - if (status & TCPC_ALERT_RX_HARD_RST) - tcpm_pd_hard_reset(tcpci->port); - - if (status & TCPC_ALERT_TX_SUCCESS) - tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_SUCCESS); - else if (status & TCPC_ALERT_TX_DISCARDED) - tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_DISCARDED); - else if (status & TCPC_ALERT_TX_FAILED) - tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_FAILED); - - return IRQ_HANDLED; -} -EXPORT_SYMBOL_GPL(tcpci_irq); - -static irqreturn_t _tcpci_irq(int irq, void *dev_id) -{ - struct tcpci_chip *chip = dev_id; - - return tcpci_irq(chip->tcpci); -} - -static const struct regmap_config tcpci_regmap_config = { - .reg_bits = 8, - .val_bits = 8, - - .max_register = 0x7F, /* 0x80 .. 0xFF are vendor defined */ -}; - -static int tcpci_parse_config(struct tcpci *tcpci) -{ - tcpci->controls_vbus = true; /* XXX */ - - tcpci->tcpc.fwnode = device_get_named_child_node(tcpci->dev, - "connector"); - if (!tcpci->tcpc.fwnode) { - dev_err(tcpci->dev, "Can't find connector node.\n"); - return -EINVAL; - } - - return 0; -} - -struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) -{ - struct tcpci *tcpci; - int err; - - tcpci = devm_kzalloc(dev, sizeof(*tcpci), GFP_KERNEL); - if (!tcpci) - return ERR_PTR(-ENOMEM); - - tcpci->dev = dev; - tcpci->data = data; - tcpci->regmap = data->regmap; - - tcpci->tcpc.init = tcpci_init; - tcpci->tcpc.get_vbus = tcpci_get_vbus; - tcpci->tcpc.set_vbus = tcpci_set_vbus; - tcpci->tcpc.set_cc = tcpci_set_cc; - tcpci->tcpc.get_cc = tcpci_get_cc; - tcpci->tcpc.set_polarity = tcpci_set_polarity; - tcpci->tcpc.set_vconn = tcpci_set_vconn; - tcpci->tcpc.start_drp_toggling = tcpci_start_drp_toggling; - - tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx; - tcpci->tcpc.set_roles = tcpci_set_roles; - tcpci->tcpc.pd_transmit = tcpci_pd_transmit; - - err = tcpci_parse_config(tcpci); - if (err < 0) - return ERR_PTR(err); - - tcpci->port = tcpm_register_port(tcpci->dev, &tcpci->tcpc); - if (IS_ERR(tcpci->port)) - return ERR_CAST(tcpci->port); - - return tcpci; -} -EXPORT_SYMBOL_GPL(tcpci_register_port); - -void tcpci_unregister_port(struct tcpci *tcpci) -{ - tcpm_unregister_port(tcpci->port); -} -EXPORT_SYMBOL_GPL(tcpci_unregister_port); - -static int tcpci_probe(struct i2c_client *client, - const struct i2c_device_id *i2c_id) -{ - struct tcpci_chip *chip; - int err; - u16 val = 0; - - chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); - if (!chip) - return -ENOMEM; - - chip->data.regmap = devm_regmap_init_i2c(client, &tcpci_regmap_config); - if (IS_ERR(chip->data.regmap)) - return PTR_ERR(chip->data.regmap); - - i2c_set_clientdata(client, chip); - - /* Disable chip interrupts before requesting irq */ - err = regmap_raw_write(chip->data.regmap, TCPC_ALERT_MASK, &val, - sizeof(u16)); - if (err < 0) - return err; - - chip->tcpci = tcpci_register_port(&client->dev, &chip->data); - if (IS_ERR(chip->tcpci)) - return PTR_ERR(chip->tcpci); - - err = devm_request_threaded_irq(&client->dev, client->irq, NULL, - _tcpci_irq, - IRQF_ONESHOT | IRQF_TRIGGER_LOW, - dev_name(&client->dev), chip); - if (err < 0) { - tcpci_unregister_port(chip->tcpci); - return err; - } - - return 0; -} - -static int tcpci_remove(struct i2c_client *client) -{ - struct tcpci_chip *chip = i2c_get_clientdata(client); - - tcpci_unregister_port(chip->tcpci); - - return 0; -} - -static const struct i2c_device_id tcpci_id[] = { - { "tcpci", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, tcpci_id); - -#ifdef CONFIG_OF -static const struct of_device_id tcpci_of_match[] = { - { .compatible = "nxp,ptn5110", }, - {}, -}; -MODULE_DEVICE_TABLE(of, tcpci_of_match); -#endif - -static struct i2c_driver tcpci_i2c_driver = { - .driver = { - .name = "tcpci", - .of_match_table = of_match_ptr(tcpci_of_match), - }, - .probe = tcpci_probe, - .remove = tcpci_remove, - .id_table = tcpci_id, -}; -module_i2c_driver(tcpci_i2c_driver); - -MODULE_DESCRIPTION("USB Type-C Port Controller Interface driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/tcpci.h b/drivers/usb/typec/tcpci.h deleted file mode 100644 index 303ebde26546..000000000000 --- a/drivers/usb/typec/tcpci.h +++ /dev/null @@ -1,139 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ */ -/* - * Copyright 2015-2017 Google, Inc - * - * USB Type-C Port Controller Interface. - */ - -#ifndef __LINUX_USB_TCPCI_H -#define __LINUX_USB_TCPCI_H - -#define TCPC_VENDOR_ID 0x0 -#define TCPC_PRODUCT_ID 0x2 -#define TCPC_BCD_DEV 0x4 -#define TCPC_TC_REV 0x6 -#define TCPC_PD_REV 0x8 -#define TCPC_PD_INT_REV 0xa - -#define TCPC_ALERT 0x10 -#define TCPC_ALERT_VBUS_DISCNCT BIT(11) -#define TCPC_ALERT_RX_BUF_OVF BIT(10) -#define TCPC_ALERT_FAULT BIT(9) -#define TCPC_ALERT_V_ALARM_LO BIT(8) -#define TCPC_ALERT_V_ALARM_HI BIT(7) -#define TCPC_ALERT_TX_SUCCESS BIT(6) -#define TCPC_ALERT_TX_DISCARDED BIT(5) -#define TCPC_ALERT_TX_FAILED BIT(4) -#define TCPC_ALERT_RX_HARD_RST BIT(3) -#define TCPC_ALERT_RX_STATUS BIT(2) -#define TCPC_ALERT_POWER_STATUS BIT(1) -#define TCPC_ALERT_CC_STATUS BIT(0) - -#define TCPC_ALERT_MASK 0x12 -#define TCPC_POWER_STATUS_MASK 0x14 -#define TCPC_FAULT_STATUS_MASK 0x15 -#define TCPC_CONFIG_STD_OUTPUT 0x18 - -#define TCPC_TCPC_CTRL 0x19 -#define TCPC_TCPC_CTRL_ORIENTATION BIT(0) - -#define TCPC_ROLE_CTRL 0x1a -#define TCPC_ROLE_CTRL_DRP BIT(6) -#define TCPC_ROLE_CTRL_RP_VAL_SHIFT 4 -#define TCPC_ROLE_CTRL_RP_VAL_MASK 0x3 -#define TCPC_ROLE_CTRL_RP_VAL_DEF 0x0 -#define TCPC_ROLE_CTRL_RP_VAL_1_5 0x1 -#define TCPC_ROLE_CTRL_RP_VAL_3_0 0x2 -#define TCPC_ROLE_CTRL_CC2_SHIFT 2 -#define TCPC_ROLE_CTRL_CC2_MASK 0x3 -#define TCPC_ROLE_CTRL_CC1_SHIFT 0 -#define TCPC_ROLE_CTRL_CC1_MASK 0x3 -#define TCPC_ROLE_CTRL_CC_RA 0x0 -#define TCPC_ROLE_CTRL_CC_RP 0x1 -#define TCPC_ROLE_CTRL_CC_RD 0x2 -#define TCPC_ROLE_CTRL_CC_OPEN 0x3 - -#define TCPC_FAULT_CTRL 0x1b - -#define TCPC_POWER_CTRL 0x1c -#define TCPC_POWER_CTRL_VCONN_ENABLE BIT(0) - -#define TCPC_CC_STATUS 0x1d -#define TCPC_CC_STATUS_TOGGLING BIT(5) -#define TCPC_CC_STATUS_TERM BIT(4) -#define TCPC_CC_STATUS_CC2_SHIFT 2 -#define TCPC_CC_STATUS_CC2_MASK 0x3 -#define TCPC_CC_STATUS_CC1_SHIFT 0 -#define TCPC_CC_STATUS_CC1_MASK 0x3 - -#define TCPC_POWER_STATUS 0x1e -#define TCPC_POWER_STATUS_UNINIT BIT(6) -#define TCPC_POWER_STATUS_VBUS_DET BIT(3) -#define TCPC_POWER_STATUS_VBUS_PRES BIT(2) - -#define TCPC_FAULT_STATUS 0x1f - -#define TCPC_COMMAND 0x23 -#define TCPC_CMD_WAKE_I2C 0x11 -#define TCPC_CMD_DISABLE_VBUS_DETECT 0x22 -#define TCPC_CMD_ENABLE_VBUS_DETECT 0x33 -#define TCPC_CMD_DISABLE_SINK_VBUS 0x44 -#define TCPC_CMD_SINK_VBUS 0x55 -#define TCPC_CMD_DISABLE_SRC_VBUS 0x66 -#define TCPC_CMD_SRC_VBUS_DEFAULT 0x77 -#define TCPC_CMD_SRC_VBUS_HIGH 0x88 -#define TCPC_CMD_LOOK4CONNECTION 0x99 -#define TCPC_CMD_RXONEMORE 0xAA -#define TCPC_CMD_I2C_IDLE 0xFF - -#define TCPC_DEV_CAP_1 0x24 -#define TCPC_DEV_CAP_2 0x26 -#define TCPC_STD_INPUT_CAP 0x28 -#define TCPC_STD_OUTPUT_CAP 0x29 - -#define TCPC_MSG_HDR_INFO 0x2e -#define TCPC_MSG_HDR_INFO_DATA_ROLE BIT(3) -#define TCPC_MSG_HDR_INFO_PWR_ROLE BIT(0) -#define TCPC_MSG_HDR_INFO_REV_SHIFT 1 -#define TCPC_MSG_HDR_INFO_REV_MASK 0x3 - -#define TCPC_RX_DETECT 0x2f -#define TCPC_RX_DETECT_HARD_RESET BIT(5) -#define TCPC_RX_DETECT_SOP BIT(0) - -#define TCPC_RX_BYTE_CNT 0x30 -#define TCPC_RX_BUF_FRAME_TYPE 0x31 -#define TCPC_RX_HDR 0x32 -#define TCPC_RX_DATA 0x34 /* through 0x4f */ - -#define TCPC_TRANSMIT 0x50 -#define TCPC_TRANSMIT_RETRY_SHIFT 4 -#define TCPC_TRANSMIT_RETRY_MASK 0x3 -#define TCPC_TRANSMIT_TYPE_SHIFT 0 -#define TCPC_TRANSMIT_TYPE_MASK 0x7 - -#define TCPC_TX_BYTE_CNT 0x51 -#define TCPC_TX_HDR 0x52 -#define TCPC_TX_DATA 0x54 /* through 0x6f */ - -#define TCPC_VBUS_VOLTAGE 0x70 -#define TCPC_VBUS_SINK_DISCONNECT_THRESH 0x72 -#define TCPC_VBUS_STOP_DISCHARGE_THRESH 0x74 -#define TCPC_VBUS_VOLTAGE_ALARM_HI_CFG 0x76 -#define TCPC_VBUS_VOLTAGE_ALARM_LO_CFG 0x78 - -struct tcpci; -struct tcpci_data { - struct regmap *regmap; - int (*init)(struct tcpci *tcpci, struct tcpci_data *data); - int (*set_vconn)(struct tcpci *tcpci, struct tcpci_data *data, - bool enable); - int (*start_drp_toggling)(struct tcpci *tcpci, struct tcpci_data *data, - enum typec_cc_status cc); -}; - -struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data); -void tcpci_unregister_port(struct tcpci *tcpci); -irqreturn_t tcpci_irq(struct tcpci *tcpci); - -#endif /* __LINUX_USB_TCPCI_H */ diff --git a/drivers/usb/typec/tcpci_rt1711h.c b/drivers/usb/typec/tcpci_rt1711h.c deleted file mode 100644 index 017389021b96..000000000000 --- a/drivers/usb/typec/tcpci_rt1711h.c +++ /dev/null @@ -1,312 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright (C) 2018, Richtek Technology Corporation - * - * Richtek RT1711H Type-C Chip Driver - */ - -#include -#include -#include -#include -#include -#include -#include -#include "tcpci.h" - -#define RT1711H_VID 0x29CF -#define RT1711H_PID 0x1711 - -#define RT1711H_RTCTRL8 0x9B - -/* Autoidle timeout = (tout * 2 + 1) * 6.4ms */ -#define RT1711H_RTCTRL8_SET(ck300, ship_off, auto_idle, tout) \ - (((ck300) << 7) | ((ship_off) << 5) | \ - ((auto_idle) << 3) | ((tout) & 0x07)) - -#define RT1711H_RTCTRL11 0x9E - -/* I2C timeout = (tout + 1) * 12.5ms */ -#define RT1711H_RTCTRL11_SET(en, tout) \ - (((en) << 7) | ((tout) & 0x0F)) - -#define RT1711H_RTCTRL13 0xA0 -#define RT1711H_RTCTRL14 0xA1 -#define RT1711H_RTCTRL15 0xA2 -#define RT1711H_RTCTRL16 0xA3 - -struct rt1711h_chip { - struct tcpci_data data; - struct tcpci *tcpci; - struct device *dev; -}; - -static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val) -{ - return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u16)); -} - -static int rt1711h_write16(struct rt1711h_chip *chip, unsigned int reg, u16 val) -{ - return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u16)); -} - -static int rt1711h_read8(struct rt1711h_chip *chip, unsigned int reg, u8 *val) -{ - return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u8)); -} - -static int rt1711h_write8(struct rt1711h_chip *chip, unsigned int reg, u8 val) -{ - return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u8)); -} - -static const struct regmap_config rt1711h_regmap_config = { - .reg_bits = 8, - .val_bits = 8, - - .max_register = 0xFF, /* 0x80 .. 0xFF are vendor defined */ -}; - -static struct rt1711h_chip *tdata_to_rt1711h(struct tcpci_data *tdata) -{ - return container_of(tdata, struct rt1711h_chip, data); -} - -static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata) -{ - int ret; - struct rt1711h_chip *chip = tdata_to_rt1711h(tdata); - - /* CK 300K from 320K, shipping off, auto_idle enable, tout = 32ms */ - ret = rt1711h_write8(chip, RT1711H_RTCTRL8, - RT1711H_RTCTRL8_SET(0, 1, 1, 2)); - if (ret < 0) - return ret; - - /* I2C reset : (val + 1) * 12.5ms */ - ret = rt1711h_write8(chip, RT1711H_RTCTRL11, - RT1711H_RTCTRL11_SET(1, 0x0F)); - if (ret < 0) - return ret; - - /* tTCPCfilter : (26.7 * val) us */ - ret = rt1711h_write8(chip, RT1711H_RTCTRL14, 0x0F); - if (ret < 0) - return ret; - - /* tDRP : (51.2 + 6.4 * val) ms */ - ret = rt1711h_write8(chip, RT1711H_RTCTRL15, 0x04); - if (ret < 0) - return ret; - - /* dcSRC.DRP : 33% */ - return rt1711h_write16(chip, RT1711H_RTCTRL16, 330); -} - -static int rt1711h_set_vconn(struct tcpci *tcpci, struct tcpci_data *tdata, - bool enable) -{ - struct rt1711h_chip *chip = tdata_to_rt1711h(tdata); - - return rt1711h_write8(chip, RT1711H_RTCTRL8, - RT1711H_RTCTRL8_SET(0, 1, !enable, 2)); -} - -static int rt1711h_start_drp_toggling(struct tcpci *tcpci, - struct tcpci_data *tdata, - enum typec_cc_status cc) -{ - struct rt1711h_chip *chip = tdata_to_rt1711h(tdata); - int ret; - unsigned int reg = 0; - - switch (cc) { - default: - case TYPEC_CC_RP_DEF: - reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - case TYPEC_CC_RP_1_5: - reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - case TYPEC_CC_RP_3_0: - reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 << - TCPC_ROLE_CTRL_RP_VAL_SHIFT); - break; - } - - if (cc == TYPEC_CC_RD) - reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT); - else - reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | - (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT); - - ret = rt1711h_write8(chip, TCPC_ROLE_CTRL, reg); - if (ret < 0) - return ret; - usleep_range(500, 1000); - - return 0; -} - -static irqreturn_t rt1711h_irq(int irq, void *dev_id) -{ - int ret; - u16 alert; - u8 status; - struct rt1711h_chip *chip = dev_id; - - if (!chip->tcpci) - return IRQ_HANDLED; - - ret = rt1711h_read16(chip, TCPC_ALERT, &alert); - if (ret < 0) - goto out; - - if (alert & TCPC_ALERT_CC_STATUS) { - ret = rt1711h_read8(chip, TCPC_CC_STATUS, &status); - if (ret < 0) - goto out; - /* Clear cc change event triggered by starting toggling */ - if (status & TCPC_CC_STATUS_TOGGLING) - rt1711h_write8(chip, TCPC_ALERT, TCPC_ALERT_CC_STATUS); - } - -out: - return tcpci_irq(chip->tcpci); -} - -static int rt1711h_init_alert(struct rt1711h_chip *chip, - struct i2c_client *client) -{ - int ret; - - /* Disable chip interrupts before requesting irq */ - ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0); - if (ret < 0) - return ret; - - ret = devm_request_threaded_irq(chip->dev, client->irq, NULL, - rt1711h_irq, - IRQF_ONESHOT | IRQF_TRIGGER_LOW, - dev_name(chip->dev), chip); - if (ret < 0) - return ret; - enable_irq_wake(client->irq); - return 0; -} - -static int rt1711h_sw_reset(struct rt1711h_chip *chip) -{ - int ret; - - ret = rt1711h_write8(chip, RT1711H_RTCTRL13, 0x01); - if (ret < 0) - return ret; - - usleep_range(1000, 2000); - return 0; -} - -static int rt1711h_check_revision(struct i2c_client *i2c) -{ - int ret; - - ret = i2c_smbus_read_word_data(i2c, TCPC_VENDOR_ID); - if (ret < 0) - return ret; - if (ret != RT1711H_VID) { - dev_err(&i2c->dev, "vid is not correct, 0x%04x\n", ret); - return -ENODEV; - } - ret = i2c_smbus_read_word_data(i2c, TCPC_PRODUCT_ID); - if (ret < 0) - return ret; - if (ret != RT1711H_PID) { - dev_err(&i2c->dev, "pid is not correct, 0x%04x\n", ret); - return -ENODEV; - } - return 0; -} - -static int rt1711h_probe(struct i2c_client *client, - const struct i2c_device_id *i2c_id) -{ - int ret; - struct rt1711h_chip *chip; - - ret = rt1711h_check_revision(client); - if (ret < 0) { - dev_err(&client->dev, "check vid/pid fail\n"); - return ret; - } - - chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); - if (!chip) - return -ENOMEM; - - chip->data.regmap = devm_regmap_init_i2c(client, - &rt1711h_regmap_config); - if (IS_ERR(chip->data.regmap)) - return PTR_ERR(chip->data.regmap); - - chip->dev = &client->dev; - i2c_set_clientdata(client, chip); - - ret = rt1711h_sw_reset(chip); - if (ret < 0) - return ret; - - ret = rt1711h_init_alert(chip, client); - if (ret < 0) - return ret; - - chip->data.init = rt1711h_init; - chip->data.set_vconn = rt1711h_set_vconn; - chip->data.start_drp_toggling = rt1711h_start_drp_toggling; - chip->tcpci = tcpci_register_port(chip->dev, &chip->data); - if (IS_ERR_OR_NULL(chip->tcpci)) - return PTR_ERR(chip->tcpci); - - return 0; -} - -static int rt1711h_remove(struct i2c_client *client) -{ - struct rt1711h_chip *chip = i2c_get_clientdata(client); - - tcpci_unregister_port(chip->tcpci); - return 0; -} - -static const struct i2c_device_id rt1711h_id[] = { - { "rt1711h", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, rt1711h_id); - -#ifdef CONFIG_OF -static const struct of_device_id rt1711h_of_match[] = { - { .compatible = "richtek,rt1711h", }, - {}, -}; -MODULE_DEVICE_TABLE(of, rt1711h_of_match); -#endif - -static struct i2c_driver rt1711h_i2c_driver = { - .driver = { - .name = "rt1711h", - .of_match_table = of_match_ptr(rt1711h_of_match), - }, - .probe = rt1711h_probe, - .remove = rt1711h_remove, - .id_table = rt1711h_id, -}; -module_i2c_driver(rt1711h_i2c_driver); - -MODULE_AUTHOR("ShuFan Lee "); -MODULE_DESCRIPTION("RT1711H USB Type-C Port Controller Interface Driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c deleted file mode 100644 index 4f1f4215f3d6..000000000000 --- a/drivers/usb/typec/tcpm.c +++ /dev/null @@ -1,4851 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright 2015-2017 Google, Inc - * - * USB Power Delivery protocol stack. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define FOREACH_STATE(S) \ - S(INVALID_STATE), \ - S(DRP_TOGGLING), \ - S(SRC_UNATTACHED), \ - S(SRC_ATTACH_WAIT), \ - S(SRC_ATTACHED), \ - S(SRC_STARTUP), \ - S(SRC_SEND_CAPABILITIES), \ - S(SRC_NEGOTIATE_CAPABILITIES), \ - S(SRC_TRANSITION_SUPPLY), \ - S(SRC_READY), \ - S(SRC_WAIT_NEW_CAPABILITIES), \ - \ - S(SNK_UNATTACHED), \ - S(SNK_ATTACH_WAIT), \ - S(SNK_DEBOUNCED), \ - S(SNK_ATTACHED), \ - S(SNK_STARTUP), \ - S(SNK_DISCOVERY), \ - S(SNK_DISCOVERY_DEBOUNCE), \ - S(SNK_DISCOVERY_DEBOUNCE_DONE), \ - S(SNK_WAIT_CAPABILITIES), \ - S(SNK_NEGOTIATE_CAPABILITIES), \ - S(SNK_NEGOTIATE_PPS_CAPABILITIES), \ - S(SNK_TRANSITION_SINK), \ - S(SNK_TRANSITION_SINK_VBUS), \ - S(SNK_READY), \ - \ - S(ACC_UNATTACHED), \ - S(DEBUG_ACC_ATTACHED), \ - S(AUDIO_ACC_ATTACHED), \ - S(AUDIO_ACC_DEBOUNCE), \ - \ - S(HARD_RESET_SEND), \ - S(HARD_RESET_START), \ - S(SRC_HARD_RESET_VBUS_OFF), \ - S(SRC_HARD_RESET_VBUS_ON), \ - S(SNK_HARD_RESET_SINK_OFF), \ - S(SNK_HARD_RESET_WAIT_VBUS), \ - S(SNK_HARD_RESET_SINK_ON), \ - \ - S(SOFT_RESET), \ - S(SOFT_RESET_SEND), \ - \ - S(DR_SWAP_ACCEPT), \ - S(DR_SWAP_SEND), \ - S(DR_SWAP_SEND_TIMEOUT), \ - S(DR_SWAP_CANCEL), \ - S(DR_SWAP_CHANGE_DR), \ - \ - S(PR_SWAP_ACCEPT), \ - S(PR_SWAP_SEND), \ - S(PR_SWAP_SEND_TIMEOUT), \ - S(PR_SWAP_CANCEL), \ - S(PR_SWAP_START), \ - S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \ - S(PR_SWAP_SRC_SNK_SOURCE_OFF), \ - S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \ - S(PR_SWAP_SRC_SNK_SINK_ON), \ - S(PR_SWAP_SNK_SRC_SINK_OFF), \ - S(PR_SWAP_SNK_SRC_SOURCE_ON), \ - S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \ - \ - S(VCONN_SWAP_ACCEPT), \ - S(VCONN_SWAP_SEND), \ - S(VCONN_SWAP_SEND_TIMEOUT), \ - S(VCONN_SWAP_CANCEL), \ - S(VCONN_SWAP_START), \ - S(VCONN_SWAP_WAIT_FOR_VCONN), \ - S(VCONN_SWAP_TURN_ON_VCONN), \ - S(VCONN_SWAP_TURN_OFF_VCONN), \ - \ - S(SNK_TRY), \ - S(SNK_TRY_WAIT), \ - S(SNK_TRY_WAIT_DEBOUNCE), \ - S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \ - S(SRC_TRYWAIT), \ - S(SRC_TRYWAIT_DEBOUNCE), \ - S(SRC_TRYWAIT_UNATTACHED), \ - \ - S(SRC_TRY), \ - S(SRC_TRY_WAIT), \ - S(SRC_TRY_DEBOUNCE), \ - S(SNK_TRYWAIT), \ - S(SNK_TRYWAIT_DEBOUNCE), \ - S(SNK_TRYWAIT_VBUS), \ - S(BIST_RX), \ - \ - S(GET_STATUS_SEND), \ - S(GET_STATUS_SEND_TIMEOUT), \ - S(GET_PPS_STATUS_SEND), \ - S(GET_PPS_STATUS_SEND_TIMEOUT), \ - \ - S(ERROR_RECOVERY), \ - S(PORT_RESET), \ - S(PORT_RESET_WAIT_OFF) - -#define GENERATE_ENUM(e) e -#define GENERATE_STRING(s) #s - -enum tcpm_state { - FOREACH_STATE(GENERATE_ENUM) -}; - -static const char * const tcpm_states[] = { - FOREACH_STATE(GENERATE_STRING) -}; - -enum vdm_states { - VDM_STATE_ERR_BUSY = -3, - VDM_STATE_ERR_SEND = -2, - VDM_STATE_ERR_TMOUT = -1, - VDM_STATE_DONE = 0, - /* Anything >0 represents an active state */ - VDM_STATE_READY = 1, - VDM_STATE_BUSY = 2, - VDM_STATE_WAIT_RSP_BUSY = 3, -}; - -enum pd_msg_request { - PD_MSG_NONE = 0, - PD_MSG_CTRL_REJECT, - PD_MSG_CTRL_WAIT, - PD_MSG_CTRL_NOT_SUPP, - PD_MSG_DATA_SINK_CAP, - PD_MSG_DATA_SOURCE_CAP, -}; - -/* Events from low level driver */ - -#define TCPM_CC_EVENT BIT(0) -#define TCPM_VBUS_EVENT BIT(1) -#define TCPM_RESET_EVENT BIT(2) - -#define LOG_BUFFER_ENTRIES 1024 -#define LOG_BUFFER_ENTRY_SIZE 128 - -/* Alternate mode support */ - -#define SVID_DISCOVERY_MAX 16 -#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX) - -struct pd_mode_data { - int svid_index; /* current SVID index */ - int nsvids; - u16 svids[SVID_DISCOVERY_MAX]; - int altmodes; /* number of alternate modes */ - struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX]; -}; - -struct pd_pps_data { - u32 min_volt; - u32 max_volt; - u32 max_curr; - u32 out_volt; - u32 op_curr; - bool supported; - bool active; -}; - -struct tcpm_port { - struct device *dev; - - struct mutex lock; /* tcpm state machine lock */ - struct workqueue_struct *wq; - - struct typec_capability typec_caps; - struct typec_port *typec_port; - - struct tcpc_dev *tcpc; - struct usb_role_switch *role_sw; - - enum typec_role vconn_role; - enum typec_role pwr_role; - enum typec_data_role data_role; - enum typec_pwr_opmode pwr_opmode; - - struct usb_pd_identity partner_ident; - struct typec_partner_desc partner_desc; - struct typec_partner *partner; - - enum typec_cc_status cc_req; - - enum typec_cc_status cc1; - enum typec_cc_status cc2; - enum typec_cc_polarity polarity; - - bool attached; - bool connected; - enum typec_port_type port_type; - bool vbus_present; - bool vbus_never_low; - bool vbus_source; - bool vbus_charge; - - bool send_discover; - bool op_vsafe5v; - - int try_role; - int try_snk_count; - int try_src_count; - - enum pd_msg_request queued_message; - - enum tcpm_state enter_state; - enum tcpm_state prev_state; - enum tcpm_state state; - enum tcpm_state delayed_state; - unsigned long delayed_runtime; - unsigned long delay_ms; - - spinlock_t pd_event_lock; - u32 pd_events; - - struct work_struct event_work; - struct delayed_work state_machine; - struct delayed_work vdm_state_machine; - bool state_machine_running; - - struct completion tx_complete; - enum tcpm_transmit_status tx_status; - - struct mutex swap_lock; /* swap command lock */ - bool swap_pending; - bool non_pd_role_swap; - struct completion swap_complete; - int swap_status; - - unsigned int negotiated_rev; - unsigned int message_id; - unsigned int caps_count; - unsigned int hard_reset_count; - bool pd_capable; - bool explicit_contract; - unsigned int rx_msgid; - - /* Partner capabilities/requests */ - u32 sink_request; - u32 source_caps[PDO_MAX_OBJECTS]; - unsigned int nr_source_caps; - u32 sink_caps[PDO_MAX_OBJECTS]; - unsigned int nr_sink_caps; - - /* Local capabilities */ - u32 src_pdo[PDO_MAX_OBJECTS]; - unsigned int nr_src_pdo; - u32 snk_pdo[PDO_MAX_OBJECTS]; - unsigned int nr_snk_pdo; - u32 snk_vdo[VDO_MAX_OBJECTS]; - unsigned int nr_snk_vdo; - - unsigned int operating_snk_mw; - bool update_sink_caps; - - /* Requested current / voltage */ - u32 current_limit; - u32 supply_voltage; - - /* Used to export TA voltage and current */ - struct power_supply *psy; - struct power_supply_desc psy_desc; - enum power_supply_usb_type usb_type; - - u32 bist_request; - - /* PD state for Vendor Defined Messages */ - enum vdm_states vdm_state; - u32 vdm_retries; - /* next Vendor Defined Message to send */ - u32 vdo_data[VDO_MAX_SIZE]; - u8 vdo_count; - /* VDO to retry if UFP responder replied busy */ - u32 vdo_retry; - - /* PPS */ - struct pd_pps_data pps_data; - struct completion pps_complete; - bool pps_pending; - int pps_status; - - /* Alternate mode data */ - struct pd_mode_data mode_data; - struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX]; - struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX]; - - /* Deadline in jiffies to exit src_try_wait state */ - unsigned long max_wait; - -#ifdef CONFIG_DEBUG_FS - struct dentry *dentry; - struct mutex logbuffer_lock; /* log buffer access lock */ - int logbuffer_head; - int logbuffer_tail; - u8 *logbuffer[LOG_BUFFER_ENTRIES]; -#endif -}; - -struct pd_rx_event { - struct work_struct work; - struct tcpm_port *port; - struct pd_message msg; -}; - -#define tcpm_cc_is_sink(cc) \ - ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \ - (cc) == TYPEC_CC_RP_3_0) - -#define tcpm_port_is_sink(port) \ - ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \ - (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1))) - -#define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD) -#define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA) -#define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN) - -#define tcpm_port_is_source(port) \ - ((tcpm_cc_is_source((port)->cc1) && \ - !tcpm_cc_is_source((port)->cc2)) || \ - (tcpm_cc_is_source((port)->cc2) && \ - !tcpm_cc_is_source((port)->cc1))) - -#define tcpm_port_is_debug(port) \ - (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2)) - -#define tcpm_port_is_audio(port) \ - (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2)) - -#define tcpm_port_is_audio_detached(port) \ - ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \ - (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1))) - -#define tcpm_try_snk(port) \ - ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \ - (port)->port_type == TYPEC_PORT_DRP) - -#define tcpm_try_src(port) \ - ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \ - (port)->port_type == TYPEC_PORT_DRP) - -static enum tcpm_state tcpm_default_state(struct tcpm_port *port) -{ - if (port->port_type == TYPEC_PORT_DRP) { - if (port->try_role == TYPEC_SINK) - return SNK_UNATTACHED; - else if (port->try_role == TYPEC_SOURCE) - return SRC_UNATTACHED; - else if (port->tcpc->config->default_role == TYPEC_SINK) - return SNK_UNATTACHED; - /* Fall through to return SRC_UNATTACHED */ - } else if (port->port_type == TYPEC_PORT_SNK) { - return SNK_UNATTACHED; - } - return SRC_UNATTACHED; -} - -static inline -struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap) -{ - return container_of(cap, struct tcpm_port, typec_caps); -} - -static bool tcpm_port_is_disconnected(struct tcpm_port *port) -{ - return (!port->attached && port->cc1 == TYPEC_CC_OPEN && - port->cc2 == TYPEC_CC_OPEN) || - (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 && - port->cc1 == TYPEC_CC_OPEN) || - (port->polarity == TYPEC_POLARITY_CC2 && - port->cc2 == TYPEC_CC_OPEN))); -} - -/* - * Logging - */ - -#ifdef CONFIG_DEBUG_FS - -static bool tcpm_log_full(struct tcpm_port *port) -{ - return port->logbuffer_tail == - (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; -} - -__printf(2, 0) -static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args) -{ - char tmpbuffer[LOG_BUFFER_ENTRY_SIZE]; - u64 ts_nsec = local_clock(); - unsigned long rem_nsec; - - mutex_lock(&port->logbuffer_lock); - if (!port->logbuffer[port->logbuffer_head]) { - port->logbuffer[port->logbuffer_head] = - kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL); - if (!port->logbuffer[port->logbuffer_head]) { - mutex_unlock(&port->logbuffer_lock); - return; - } - } - - vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args); - - if (tcpm_log_full(port)) { - port->logbuffer_head = max(port->logbuffer_head - 1, 0); - strcpy(tmpbuffer, "overflow"); - } - - if (port->logbuffer_head < 0 || - port->logbuffer_head >= LOG_BUFFER_ENTRIES) { - dev_warn(port->dev, - "Bad log buffer index %d\n", port->logbuffer_head); - goto abort; - } - - if (!port->logbuffer[port->logbuffer_head]) { - dev_warn(port->dev, - "Log buffer index %d is NULL\n", port->logbuffer_head); - goto abort; - } - - rem_nsec = do_div(ts_nsec, 1000000000); - scnprintf(port->logbuffer[port->logbuffer_head], - LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s", - (unsigned long)ts_nsec, rem_nsec / 1000, - tmpbuffer); - port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; - -abort: - mutex_unlock(&port->logbuffer_lock); -} - -__printf(2, 3) -static void tcpm_log(struct tcpm_port *port, const char *fmt, ...) -{ - va_list args; - - /* Do not log while disconnected and unattached */ - if (tcpm_port_is_disconnected(port) && - (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED || - port->state == DRP_TOGGLING)) - return; - - va_start(args, fmt); - _tcpm_log(port, fmt, args); - va_end(args); -} - -__printf(2, 3) -static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) -{ - va_list args; - - va_start(args, fmt); - _tcpm_log(port, fmt, args); - va_end(args); -} - -static void tcpm_log_source_caps(struct tcpm_port *port) -{ - int i; - - for (i = 0; i < port->nr_source_caps; i++) { - u32 pdo = port->source_caps[i]; - enum pd_pdo_type type = pdo_type(pdo); - char msg[64]; - - switch (type) { - case PDO_TYPE_FIXED: - scnprintf(msg, sizeof(msg), - "%u mV, %u mA [%s%s%s%s%s%s]", - pdo_fixed_voltage(pdo), - pdo_max_current(pdo), - (pdo & PDO_FIXED_DUAL_ROLE) ? - "R" : "", - (pdo & PDO_FIXED_SUSPEND) ? - "S" : "", - (pdo & PDO_FIXED_HIGHER_CAP) ? - "H" : "", - (pdo & PDO_FIXED_USB_COMM) ? - "U" : "", - (pdo & PDO_FIXED_DATA_SWAP) ? - "D" : "", - (pdo & PDO_FIXED_EXTPOWER) ? - "E" : ""); - break; - case PDO_TYPE_VAR: - scnprintf(msg, sizeof(msg), - "%u-%u mV, %u mA", - pdo_min_voltage(pdo), - pdo_max_voltage(pdo), - pdo_max_current(pdo)); - break; - case PDO_TYPE_BATT: - scnprintf(msg, sizeof(msg), - "%u-%u mV, %u mW", - pdo_min_voltage(pdo), - pdo_max_voltage(pdo), - pdo_max_power(pdo)); - break; - case PDO_TYPE_APDO: - if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) - scnprintf(msg, sizeof(msg), - "%u-%u mV, %u mA", - pdo_pps_apdo_min_voltage(pdo), - pdo_pps_apdo_max_voltage(pdo), - pdo_pps_apdo_max_current(pdo)); - else - strcpy(msg, "undefined APDO"); - break; - default: - strcpy(msg, "undefined"); - break; - } - tcpm_log(port, " PDO %d: type %d, %s", - i, type, msg); - } -} - -static int tcpm_debug_show(struct seq_file *s, void *v) -{ - struct tcpm_port *port = (struct tcpm_port *)s->private; - int tail; - - mutex_lock(&port->logbuffer_lock); - tail = port->logbuffer_tail; - while (tail != port->logbuffer_head) { - seq_printf(s, "%s\n", port->logbuffer[tail]); - tail = (tail + 1) % LOG_BUFFER_ENTRIES; - } - if (!seq_has_overflowed(s)) - port->logbuffer_tail = tail; - mutex_unlock(&port->logbuffer_lock); - - return 0; -} -DEFINE_SHOW_ATTRIBUTE(tcpm_debug); - -static struct dentry *rootdir; - -static void tcpm_debugfs_init(struct tcpm_port *port) -{ - mutex_init(&port->logbuffer_lock); - /* /sys/kernel/debug/tcpm/usbcX */ - if (!rootdir) - rootdir = debugfs_create_dir("tcpm", NULL); - - port->dentry = debugfs_create_file(dev_name(port->dev), - S_IFREG | 0444, rootdir, - port, &tcpm_debug_fops); -} - -static void tcpm_debugfs_exit(struct tcpm_port *port) -{ - debugfs_remove(port->dentry); -} - -#else - -__printf(2, 3) -static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { } -__printf(2, 3) -static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { } -static void tcpm_log_source_caps(struct tcpm_port *port) { } -static void tcpm_debugfs_init(const struct tcpm_port *port) { } -static void tcpm_debugfs_exit(const struct tcpm_port *port) { } - -#endif - -static int tcpm_pd_transmit(struct tcpm_port *port, - enum tcpm_transmit_type type, - const struct pd_message *msg) -{ - unsigned long timeout; - int ret; - - if (msg) - tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header)); - else - tcpm_log(port, "PD TX, type: %#x", type); - - reinit_completion(&port->tx_complete); - ret = port->tcpc->pd_transmit(port->tcpc, type, msg); - if (ret < 0) - return ret; - - mutex_unlock(&port->lock); - timeout = wait_for_completion_timeout(&port->tx_complete, - msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT)); - mutex_lock(&port->lock); - if (!timeout) - return -ETIMEDOUT; - - switch (port->tx_status) { - case TCPC_TX_SUCCESS: - port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK; - return 0; - case TCPC_TX_DISCARDED: - return -EAGAIN; - case TCPC_TX_FAILED: - default: - return -EIO; - } -} - -void tcpm_pd_transmit_complete(struct tcpm_port *port, - enum tcpm_transmit_status status) -{ - tcpm_log(port, "PD TX complete, status: %u", status); - port->tx_status = status; - complete(&port->tx_complete); -} -EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete); - -static int tcpm_mux_set(struct tcpm_port *port, int state, - enum usb_role usb_role, - enum typec_orientation orientation) -{ - int ret; - - tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d", - state, usb_role, orientation); - - ret = typec_set_orientation(port->typec_port, orientation); - if (ret) - return ret; - - if (port->role_sw) { - ret = usb_role_switch_set_role(port->role_sw, usb_role); - if (ret) - return ret; - } - - return typec_set_mode(port->typec_port, state); -} - -static int tcpm_set_polarity(struct tcpm_port *port, - enum typec_cc_polarity polarity) -{ - int ret; - - tcpm_log(port, "polarity %d", polarity); - - ret = port->tcpc->set_polarity(port->tcpc, polarity); - if (ret < 0) - return ret; - - port->polarity = polarity; - - return 0; -} - -static int tcpm_set_vconn(struct tcpm_port *port, bool enable) -{ - int ret; - - tcpm_log(port, "vconn:=%d", enable); - - ret = port->tcpc->set_vconn(port->tcpc, enable); - if (!ret) { - port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK; - typec_set_vconn_role(port->typec_port, port->vconn_role); - } - - return ret; -} - -static u32 tcpm_get_current_limit(struct tcpm_port *port) -{ - enum typec_cc_status cc; - u32 limit; - - cc = port->polarity ? port->cc2 : port->cc1; - switch (cc) { - case TYPEC_CC_RP_1_5: - limit = 1500; - break; - case TYPEC_CC_RP_3_0: - limit = 3000; - break; - case TYPEC_CC_RP_DEF: - default: - if (port->tcpc->get_current_limit) - limit = port->tcpc->get_current_limit(port->tcpc); - else - limit = 0; - break; - } - - return limit; -} - -static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv) -{ - int ret = -EOPNOTSUPP; - - tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma); - - port->supply_voltage = mv; - port->current_limit = max_ma; - - if (port->tcpc->set_current_limit) - ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv); - - return ret; -} - -/* - * Determine RP value to set based on maximum current supported - * by a port if configured as source. - * Returns CC value to report to link partner. - */ -static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port) -{ - const u32 *src_pdo = port->src_pdo; - int nr_pdo = port->nr_src_pdo; - int i; - - /* - * Search for first entry with matching voltage. - * It should report the maximum supported current. - */ - for (i = 0; i < nr_pdo; i++) { - const u32 pdo = src_pdo[i]; - - if (pdo_type(pdo) == PDO_TYPE_FIXED && - pdo_fixed_voltage(pdo) == 5000) { - unsigned int curr = pdo_max_current(pdo); - - if (curr >= 3000) - return TYPEC_CC_RP_3_0; - else if (curr >= 1500) - return TYPEC_CC_RP_1_5; - return TYPEC_CC_RP_DEF; - } - } - - return TYPEC_CC_RP_DEF; -} - -static int tcpm_set_attached_state(struct tcpm_port *port, bool attached) -{ - return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role, - port->data_role); -} - -static int tcpm_set_roles(struct tcpm_port *port, bool attached, - enum typec_role role, enum typec_data_role data) -{ - enum typec_orientation orientation; - enum usb_role usb_role; - int ret; - - if (port->polarity == TYPEC_POLARITY_CC1) - orientation = TYPEC_ORIENTATION_NORMAL; - else - orientation = TYPEC_ORIENTATION_REVERSE; - - if (data == TYPEC_HOST) - usb_role = USB_ROLE_HOST; - else - usb_role = USB_ROLE_DEVICE; - - ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation); - if (ret < 0) - return ret; - - ret = port->tcpc->set_roles(port->tcpc, attached, role, data); - if (ret < 0) - return ret; - - port->pwr_role = role; - port->data_role = data; - typec_set_data_role(port->typec_port, data); - typec_set_pwr_role(port->typec_port, role); - - return 0; -} - -static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role) -{ - int ret; - - ret = port->tcpc->set_roles(port->tcpc, true, role, - port->data_role); - if (ret < 0) - return ret; - - port->pwr_role = role; - typec_set_pwr_role(port->typec_port, role); - - return 0; -} - -static int tcpm_pd_send_source_caps(struct tcpm_port *port) -{ - struct pd_message msg; - int i; - - memset(&msg, 0, sizeof(msg)); - if (!port->nr_src_pdo) { - /* No source capabilities defined, sink only */ - msg.header = PD_HEADER_LE(PD_CTRL_REJECT, - port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, 0); - } else { - msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP, - port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, - port->nr_src_pdo); - } - for (i = 0; i < port->nr_src_pdo; i++) - msg.payload[i] = cpu_to_le32(port->src_pdo[i]); - - return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); -} - -static int tcpm_pd_send_sink_caps(struct tcpm_port *port) -{ - struct pd_message msg; - int i; - - memset(&msg, 0, sizeof(msg)); - if (!port->nr_snk_pdo) { - /* No sink capabilities defined, source only */ - msg.header = PD_HEADER_LE(PD_CTRL_REJECT, - port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, 0); - } else { - msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP, - port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, - port->nr_snk_pdo); - } - for (i = 0; i < port->nr_snk_pdo; i++) - msg.payload[i] = cpu_to_le32(port->snk_pdo[i]); - - return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); -} - -static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state, - unsigned int delay_ms) -{ - if (delay_ms) { - tcpm_log(port, "pending state change %s -> %s @ %u ms", - tcpm_states[port->state], tcpm_states[state], - delay_ms); - port->delayed_state = state; - mod_delayed_work(port->wq, &port->state_machine, - msecs_to_jiffies(delay_ms)); - port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms); - port->delay_ms = delay_ms; - } else { - tcpm_log(port, "state change %s -> %s", - tcpm_states[port->state], tcpm_states[state]); - port->delayed_state = INVALID_STATE; - port->prev_state = port->state; - port->state = state; - /* - * Don't re-queue the state machine work item if we're currently - * in the state machine and we're immediately changing states. - * tcpm_state_machine_work() will continue running the state - * machine. - */ - if (!port->state_machine_running) - mod_delayed_work(port->wq, &port->state_machine, 0); - } -} - -static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state, - unsigned int delay_ms) -{ - if (port->enter_state == port->state) - tcpm_set_state(port, state, delay_ms); - else - tcpm_log(port, - "skipped %sstate change %s -> %s [%u ms], context state %s", - delay_ms ? "delayed " : "", - tcpm_states[port->state], tcpm_states[state], - delay_ms, tcpm_states[port->enter_state]); -} - -static void tcpm_queue_message(struct tcpm_port *port, - enum pd_msg_request message) -{ - port->queued_message = message; - mod_delayed_work(port->wq, &port->state_machine, 0); -} - -/* - * VDM/VDO handling functions - */ -static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header, - const u32 *data, int cnt) -{ - port->vdo_count = cnt + 1; - port->vdo_data[0] = header; - memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt); - /* Set ready, vdm state machine will actually send */ - port->vdm_retries = 0; - port->vdm_state = VDM_STATE_READY; -} - -static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload, - int cnt) -{ - u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]); - u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]); - - memset(&port->mode_data, 0, sizeof(port->mode_data)); - - port->partner_ident.id_header = vdo; - port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]); - port->partner_ident.product = product; - - typec_partner_set_identity(port->partner); - - tcpm_log(port, "Identity: %04x:%04x.%04x", - PD_IDH_VID(vdo), - PD_PRODUCT_PID(product), product & 0xffff); -} - -static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload, - int cnt) -{ - struct pd_mode_data *pmdata = &port->mode_data; - int i; - - for (i = 1; i < cnt; i++) { - u32 p = le32_to_cpu(payload[i]); - u16 svid; - - svid = (p >> 16) & 0xffff; - if (!svid) - return false; - - if (pmdata->nsvids >= SVID_DISCOVERY_MAX) - goto abort; - - pmdata->svids[pmdata->nsvids++] = svid; - tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid); - - svid = p & 0xffff; - if (!svid) - return false; - - if (pmdata->nsvids >= SVID_DISCOVERY_MAX) - goto abort; - - pmdata->svids[pmdata->nsvids++] = svid; - tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid); - } - return true; -abort: - tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX); - return false; -} - -static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload, - int cnt) -{ - struct pd_mode_data *pmdata = &port->mode_data; - struct typec_altmode_desc *paltmode; - int i; - - if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) { - /* Already logged in svdm_consume_svids() */ - return; - } - - for (i = 1; i < cnt; i++) { - paltmode = &pmdata->altmode_desc[pmdata->altmodes]; - memset(paltmode, 0, sizeof(*paltmode)); - - paltmode->svid = pmdata->svids[pmdata->svid_index]; - paltmode->mode = i; - paltmode->vdo = le32_to_cpu(payload[i]); - - tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x", - pmdata->altmodes, paltmode->svid, - paltmode->mode, paltmode->vdo); - - pmdata->altmodes++; - } -} - -static void tcpm_register_partner_altmodes(struct tcpm_port *port) -{ - struct pd_mode_data *modep = &port->mode_data; - struct typec_altmode *altmode; - int i; - - for (i = 0; i < modep->altmodes; i++) { - altmode = typec_partner_register_altmode(port->partner, - &modep->altmode_desc[i]); - if (!altmode) - tcpm_log(port, "Failed to register partner SVID 0x%04x", - modep->altmode_desc[i].svid); - port->partner_altmode[i] = altmode; - } -} - -#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header) - -static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt, - u32 *response) -{ - struct typec_altmode *adev; - struct typec_altmode *pdev; - struct pd_mode_data *modep; - u32 p[PD_MAX_PAYLOAD]; - int rlen = 0; - int cmd_type; - int cmd; - int i; - - for (i = 0; i < cnt; i++) - p[i] = le32_to_cpu(payload[i]); - - cmd_type = PD_VDO_CMDT(p[0]); - cmd = PD_VDO_CMD(p[0]); - - tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d", - p[0], cmd_type, cmd, cnt); - - modep = &port->mode_data; - - adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX, - PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0])); - - pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX, - PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0])); - - switch (cmd_type) { - case CMDT_INIT: - switch (cmd) { - case CMD_DISCOVER_IDENT: - /* 6.4.4.3.1: Only respond as UFP (device) */ - if (port->data_role == TYPEC_DEVICE && - port->nr_snk_vdo) { - for (i = 0; i < port->nr_snk_vdo; i++) - response[i + 1] = port->snk_vdo[i]; - rlen = port->nr_snk_vdo + 1; - } - break; - case CMD_DISCOVER_SVID: - break; - case CMD_DISCOVER_MODES: - break; - case CMD_ENTER_MODE: - break; - case CMD_EXIT_MODE: - break; - case CMD_ATTENTION: - /* Attention command does not have response */ - typec_altmode_attention(adev, p[1]); - return 0; - default: - break; - } - if (rlen >= 1) { - response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK); - } else if (rlen == 0) { - response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK); - rlen = 1; - } else { - response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY); - rlen = 1; - } - break; - case CMDT_RSP_ACK: - /* silently drop message if we are not connected */ - if (IS_ERR_OR_NULL(port->partner)) - break; - - switch (cmd) { - case CMD_DISCOVER_IDENT: - /* 6.4.4.3.1 */ - svdm_consume_identity(port, payload, cnt); - response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID); - rlen = 1; - break; - case CMD_DISCOVER_SVID: - /* 6.4.4.3.2 */ - if (svdm_consume_svids(port, payload, cnt)) { - response[0] = VDO(USB_SID_PD, 1, - CMD_DISCOVER_SVID); - rlen = 1; - } else if (modep->nsvids && supports_modal(port)) { - response[0] = VDO(modep->svids[0], 1, - CMD_DISCOVER_MODES); - rlen = 1; - } - break; - case CMD_DISCOVER_MODES: - /* 6.4.4.3.3 */ - svdm_consume_modes(port, payload, cnt); - modep->svid_index++; - if (modep->svid_index < modep->nsvids) { - u16 svid = modep->svids[modep->svid_index]; - response[0] = VDO(svid, 1, CMD_DISCOVER_MODES); - rlen = 1; - } else { - tcpm_register_partner_altmodes(port); - } - break; - case CMD_ENTER_MODE: - typec_altmode_update_active(pdev, true); - - if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) { - response[0] = VDO(adev->svid, 1, CMD_EXIT_MODE); - response[0] |= VDO_OPOS(adev->mode); - return 1; - } - return 0; - case CMD_EXIT_MODE: - typec_altmode_update_active(pdev, false); - - /* Back to USB Operation */ - WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB, - NULL)); - break; - default: - break; - } - break; - case CMDT_RSP_NAK: - switch (cmd) { - case CMD_ENTER_MODE: - /* Back to USB Operation */ - WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB, - NULL)); - break; - default: - break; - } - break; - default: - break; - } - - /* Informing the alternate mode drivers about everything */ - typec_altmode_vdm(adev, p[0], &p[1], cnt); - - return rlen; -} - -static void tcpm_handle_vdm_request(struct tcpm_port *port, - const __le32 *payload, int cnt) -{ - int rlen = 0; - u32 response[8] = { }; - u32 p0 = le32_to_cpu(payload[0]); - - if (port->vdm_state == VDM_STATE_BUSY) { - /* If UFP responded busy retry after timeout */ - if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) { - port->vdm_state = VDM_STATE_WAIT_RSP_BUSY; - port->vdo_retry = (p0 & ~VDO_CMDT_MASK) | - CMDT_INIT; - mod_delayed_work(port->wq, &port->vdm_state_machine, - msecs_to_jiffies(PD_T_VDM_BUSY)); - return; - } - port->vdm_state = VDM_STATE_DONE; - } - - if (PD_VDO_SVDM(p0)) - rlen = tcpm_pd_svdm(port, payload, cnt, response); - - if (rlen > 0) { - tcpm_queue_vdm(port, response[0], &response[1], rlen - 1); - mod_delayed_work(port->wq, &port->vdm_state_machine, 0); - } -} - -static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd, - const u32 *data, int count) -{ - u32 header; - - if (WARN_ON(count > VDO_MAX_SIZE - 1)) - count = VDO_MAX_SIZE - 1; - - /* set VDM header with VID & CMD */ - header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ? - 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd); - tcpm_queue_vdm(port, header, data, count); - - mod_delayed_work(port->wq, &port->vdm_state_machine, 0); -} - -static unsigned int vdm_ready_timeout(u32 vdm_hdr) -{ - unsigned int timeout; - int cmd = PD_VDO_CMD(vdm_hdr); - - /* its not a structured VDM command */ - if (!PD_VDO_SVDM(vdm_hdr)) - return PD_T_VDM_UNSTRUCTURED; - - switch (PD_VDO_CMDT(vdm_hdr)) { - case CMDT_INIT: - if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE) - timeout = PD_T_VDM_WAIT_MODE_E; - else - timeout = PD_T_VDM_SNDR_RSP; - break; - default: - if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE) - timeout = PD_T_VDM_E_MODE; - else - timeout = PD_T_VDM_RCVR_RSP; - break; - } - return timeout; -} - -static void vdm_run_state_machine(struct tcpm_port *port) -{ - struct pd_message msg; - int i, res; - - switch (port->vdm_state) { - case VDM_STATE_READY: - /* Only transmit VDM if attached */ - if (!port->attached) { - port->vdm_state = VDM_STATE_ERR_BUSY; - break; - } - - /* - * if there's traffic or we're not in PDO ready state don't send - * a VDM. - */ - if (port->state != SRC_READY && port->state != SNK_READY) - break; - - /* Prepare and send VDM */ - memset(&msg, 0, sizeof(msg)); - msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF, - port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, port->vdo_count); - for (i = 0; i < port->vdo_count; i++) - msg.payload[i] = cpu_to_le32(port->vdo_data[i]); - res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); - if (res < 0) { - port->vdm_state = VDM_STATE_ERR_SEND; - } else { - unsigned long timeout; - - port->vdm_retries = 0; - port->vdm_state = VDM_STATE_BUSY; - timeout = vdm_ready_timeout(port->vdo_data[0]); - mod_delayed_work(port->wq, &port->vdm_state_machine, - timeout); - } - break; - case VDM_STATE_WAIT_RSP_BUSY: - port->vdo_data[0] = port->vdo_retry; - port->vdo_count = 1; - port->vdm_state = VDM_STATE_READY; - break; - case VDM_STATE_BUSY: - port->vdm_state = VDM_STATE_ERR_TMOUT; - break; - case VDM_STATE_ERR_SEND: - /* - * A partner which does not support USB PD will not reply, - * so this is not a fatal error. At the same time, some - * devices may not return GoodCRC under some circumstances, - * so we need to retry. - */ - if (port->vdm_retries < 3) { - tcpm_log(port, "VDM Tx error, retry"); - port->vdm_retries++; - port->vdm_state = VDM_STATE_READY; - } - break; - default: - break; - } -} - -static void vdm_state_machine_work(struct work_struct *work) -{ - struct tcpm_port *port = container_of(work, struct tcpm_port, - vdm_state_machine.work); - enum vdm_states prev_state; - - mutex_lock(&port->lock); - - /* - * Continue running as long as the port is not busy and there was - * a state change. - */ - do { - prev_state = port->vdm_state; - vdm_run_state_machine(port); - } while (port->vdm_state != prev_state && - port->vdm_state != VDM_STATE_BUSY); - - mutex_unlock(&port->lock); -} - -enum pdo_err { - PDO_NO_ERR, - PDO_ERR_NO_VSAFE5V, - PDO_ERR_VSAFE5V_NOT_FIRST, - PDO_ERR_PDO_TYPE_NOT_IN_ORDER, - PDO_ERR_FIXED_NOT_SORTED, - PDO_ERR_VARIABLE_BATT_NOT_SORTED, - PDO_ERR_DUPE_PDO, - PDO_ERR_PPS_APDO_NOT_SORTED, - PDO_ERR_DUPE_PPS_APDO, -}; - -static const char * const pdo_err_msg[] = { - [PDO_ERR_NO_VSAFE5V] = - " err: source/sink caps should atleast have vSafe5V", - [PDO_ERR_VSAFE5V_NOT_FIRST] = - " err: vSafe5V Fixed Supply Object Shall always be the first object", - [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] = - " err: PDOs should be in the following order: Fixed; Battery; Variable", - [PDO_ERR_FIXED_NOT_SORTED] = - " err: Fixed supply pdos should be in increasing order of their fixed voltage", - [PDO_ERR_VARIABLE_BATT_NOT_SORTED] = - " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage", - [PDO_ERR_DUPE_PDO] = - " err: Variable/Batt supply pdos cannot have same min/max voltage", - [PDO_ERR_PPS_APDO_NOT_SORTED] = - " err: Programmable power supply apdos should be in increasing order of their maximum voltage", - [PDO_ERR_DUPE_PPS_APDO] = - " err: Programmable power supply apdos cannot have same min/max voltage and max current", -}; - -static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo, - unsigned int nr_pdo) -{ - unsigned int i; - - /* Should at least contain vSafe5v */ - if (nr_pdo < 1) - return PDO_ERR_NO_VSAFE5V; - - /* The vSafe5V Fixed Supply Object Shall always be the first object */ - if (pdo_type(pdo[0]) != PDO_TYPE_FIXED || - pdo_fixed_voltage(pdo[0]) != VSAFE5V) - return PDO_ERR_VSAFE5V_NOT_FIRST; - - for (i = 1; i < nr_pdo; i++) { - if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) { - return PDO_ERR_PDO_TYPE_NOT_IN_ORDER; - } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) { - enum pd_pdo_type type = pdo_type(pdo[i]); - - switch (type) { - /* - * The remaining Fixed Supply Objects, if - * present, shall be sent in voltage order; - * lowest to highest. - */ - case PDO_TYPE_FIXED: - if (pdo_fixed_voltage(pdo[i]) <= - pdo_fixed_voltage(pdo[i - 1])) - return PDO_ERR_FIXED_NOT_SORTED; - break; - /* - * The Battery Supply Objects and Variable - * supply, if present shall be sent in Minimum - * Voltage order; lowest to highest. - */ - case PDO_TYPE_VAR: - case PDO_TYPE_BATT: - if (pdo_min_voltage(pdo[i]) < - pdo_min_voltage(pdo[i - 1])) - return PDO_ERR_VARIABLE_BATT_NOT_SORTED; - else if ((pdo_min_voltage(pdo[i]) == - pdo_min_voltage(pdo[i - 1])) && - (pdo_max_voltage(pdo[i]) == - pdo_min_voltage(pdo[i - 1]))) - return PDO_ERR_DUPE_PDO; - break; - /* - * The Programmable Power Supply APDOs, if present, - * shall be sent in Maximum Voltage order; - * lowest to highest. - */ - case PDO_TYPE_APDO: - if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS) - break; - - if (pdo_pps_apdo_max_current(pdo[i]) < - pdo_pps_apdo_max_current(pdo[i - 1])) - return PDO_ERR_PPS_APDO_NOT_SORTED; - else if (pdo_pps_apdo_min_voltage(pdo[i]) == - pdo_pps_apdo_min_voltage(pdo[i - 1]) && - pdo_pps_apdo_max_voltage(pdo[i]) == - pdo_pps_apdo_max_voltage(pdo[i - 1]) && - pdo_pps_apdo_max_current(pdo[i]) == - pdo_pps_apdo_max_current(pdo[i - 1])) - return PDO_ERR_DUPE_PPS_APDO; - break; - default: - tcpm_log_force(port, " Unknown pdo type"); - } - } - } - - return PDO_NO_ERR; -} - -static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo, - unsigned int nr_pdo) -{ - enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo); - - if (err_index != PDO_NO_ERR) { - tcpm_log_force(port, " %s", pdo_err_msg[err_index]); - return -EINVAL; - } - - return 0; -} - -static int tcpm_altmode_enter(struct typec_altmode *altmode) -{ - struct tcpm_port *port = typec_altmode_get_drvdata(altmode); - u32 header; - - mutex_lock(&port->lock); - header = VDO(altmode->svid, 1, CMD_ENTER_MODE); - header |= VDO_OPOS(altmode->mode); - - tcpm_queue_vdm(port, header, NULL, 0); - mod_delayed_work(port->wq, &port->vdm_state_machine, 0); - mutex_unlock(&port->lock); - - return 0; -} - -static int tcpm_altmode_exit(struct typec_altmode *altmode) -{ - struct tcpm_port *port = typec_altmode_get_drvdata(altmode); - u32 header; - - mutex_lock(&port->lock); - header = VDO(altmode->svid, 1, CMD_EXIT_MODE); - header |= VDO_OPOS(altmode->mode); - - tcpm_queue_vdm(port, header, NULL, 0); - mod_delayed_work(port->wq, &port->vdm_state_machine, 0); - mutex_unlock(&port->lock); - - return 0; -} - -static int tcpm_altmode_vdm(struct typec_altmode *altmode, - u32 header, const u32 *data, int count) -{ - struct tcpm_port *port = typec_altmode_get_drvdata(altmode); - - mutex_lock(&port->lock); - tcpm_queue_vdm(port, header, data, count - 1); - mod_delayed_work(port->wq, &port->vdm_state_machine, 0); - mutex_unlock(&port->lock); - - return 0; -} - -static const struct typec_altmode_ops tcpm_altmode_ops = { - .enter = tcpm_altmode_enter, - .exit = tcpm_altmode_exit, - .vdm = tcpm_altmode_vdm, -}; - -/* - * PD (data, control) command handling functions - */ -static inline enum tcpm_state ready_state(struct tcpm_port *port) -{ - if (port->pwr_role == TYPEC_SOURCE) - return SRC_READY; - else - return SNK_READY; -} - -static int tcpm_pd_send_control(struct tcpm_port *port, - enum pd_ctrl_msg_type type); - -static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload, - int cnt) -{ - u32 p0 = le32_to_cpu(payload[0]); - unsigned int type = usb_pd_ado_type(p0); - - if (!type) { - tcpm_log(port, "Alert message received with no type"); - return; - } - - /* Just handling non-battery alerts for now */ - if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) { - switch (port->state) { - case SRC_READY: - case SNK_READY: - tcpm_set_state(port, GET_STATUS_SEND, 0); - break; - default: - tcpm_queue_message(port, PD_MSG_CTRL_WAIT); - break; - } - } -} - -static void tcpm_pd_data_request(struct tcpm_port *port, - const struct pd_message *msg) -{ - enum pd_data_msg_type type = pd_header_type_le(msg->header); - unsigned int cnt = pd_header_cnt_le(msg->header); - unsigned int rev = pd_header_rev_le(msg->header); - unsigned int i; - - switch (type) { - case PD_DATA_SOURCE_CAP: - if (port->pwr_role != TYPEC_SINK) - break; - - for (i = 0; i < cnt; i++) - port->source_caps[i] = le32_to_cpu(msg->payload[i]); - - port->nr_source_caps = cnt; - - tcpm_log_source_caps(port); - - tcpm_validate_caps(port, port->source_caps, - port->nr_source_caps); - - /* - * Adjust revision in subsequent message headers, as required, - * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't - * support Rev 1.0 so just do nothing in that scenario. - */ - if (rev == PD_REV10) - break; - - if (rev < PD_MAX_REV) - port->negotiated_rev = rev; - - /* - * This message may be received even if VBUS is not - * present. This is quite unexpected; see USB PD - * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2. - * However, at the same time, we must be ready to - * receive this message and respond to it 15ms after - * receiving PS_RDY during power swap operations, no matter - * if VBUS is available or not (USB PD specification, - * section 6.5.9.2). - * So we need to accept the message either way, - * but be prepared to keep waiting for VBUS after it was - * handled. - */ - tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); - break; - case PD_DATA_REQUEST: - if (port->pwr_role != TYPEC_SOURCE || - cnt != 1) { - tcpm_queue_message(port, PD_MSG_CTRL_REJECT); - break; - } - - /* - * Adjust revision in subsequent message headers, as required, - * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't - * support Rev 1.0 so just reject in that scenario. - */ - if (rev == PD_REV10) { - tcpm_queue_message(port, PD_MSG_CTRL_REJECT); - break; - } - - if (rev < PD_MAX_REV) - port->negotiated_rev = rev; - - port->sink_request = le32_to_cpu(msg->payload[0]); - tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0); - break; - case PD_DATA_SINK_CAP: - /* We don't do anything with this at the moment... */ - for (i = 0; i < cnt; i++) - port->sink_caps[i] = le32_to_cpu(msg->payload[i]); - port->nr_sink_caps = cnt; - break; - case PD_DATA_VENDOR_DEF: - tcpm_handle_vdm_request(port, msg->payload, cnt); - break; - case PD_DATA_BIST: - if (port->state == SRC_READY || port->state == SNK_READY) { - port->bist_request = le32_to_cpu(msg->payload[0]); - tcpm_set_state(port, BIST_RX, 0); - } - break; - case PD_DATA_ALERT: - tcpm_handle_alert(port, msg->payload, cnt); - break; - case PD_DATA_BATT_STATUS: - case PD_DATA_GET_COUNTRY_INFO: - /* Currently unsupported */ - tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); - break; - default: - tcpm_log(port, "Unhandled data message type %#x", type); - break; - } -} - -static void tcpm_pps_complete(struct tcpm_port *port, int result) -{ - if (port->pps_pending) { - port->pps_status = result; - port->pps_pending = false; - complete(&port->pps_complete); - } -} - -static void tcpm_pd_ctrl_request(struct tcpm_port *port, - const struct pd_message *msg) -{ - enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); - enum tcpm_state next_state; - - switch (type) { - case PD_CTRL_GOOD_CRC: - case PD_CTRL_PING: - break; - case PD_CTRL_GET_SOURCE_CAP: - switch (port->state) { - case SRC_READY: - case SNK_READY: - tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP); - break; - default: - tcpm_queue_message(port, PD_MSG_CTRL_REJECT); - break; - } - break; - case PD_CTRL_GET_SINK_CAP: - switch (port->state) { - case SRC_READY: - case SNK_READY: - tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP); - break; - default: - tcpm_queue_message(port, PD_MSG_CTRL_REJECT); - break; - } - break; - case PD_CTRL_GOTO_MIN: - break; - case PD_CTRL_PS_RDY: - switch (port->state) { - case SNK_TRANSITION_SINK: - if (port->vbus_present) { - tcpm_set_current_limit(port, - port->current_limit, - port->supply_voltage); - port->explicit_contract = true; - tcpm_set_state(port, SNK_READY, 0); - } else { - /* - * Seen after power swap. Keep waiting for VBUS - * in a transitional state. - */ - tcpm_set_state(port, - SNK_TRANSITION_SINK_VBUS, 0); - } - break; - case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: - tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0); - break; - case PR_SWAP_SNK_SRC_SINK_OFF: - tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0); - break; - case VCONN_SWAP_WAIT_FOR_VCONN: - tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0); - break; - default: - break; - } - break; - case PD_CTRL_REJECT: - case PD_CTRL_WAIT: - case PD_CTRL_NOT_SUPP: - switch (port->state) { - case SNK_NEGOTIATE_CAPABILITIES: - /* USB PD specification, Figure 8-43 */ - if (port->explicit_contract) - next_state = SNK_READY; - else - next_state = SNK_WAIT_CAPABILITIES; - tcpm_set_state(port, next_state, 0); - break; - case SNK_NEGOTIATE_PPS_CAPABILITIES: - /* Revert data back from any requested PPS updates */ - port->pps_data.out_volt = port->supply_voltage; - port->pps_data.op_curr = port->current_limit; - port->pps_status = (type == PD_CTRL_WAIT ? - -EAGAIN : -EOPNOTSUPP); - tcpm_set_state(port, SNK_READY, 0); - break; - case DR_SWAP_SEND: - port->swap_status = (type == PD_CTRL_WAIT ? - -EAGAIN : -EOPNOTSUPP); - tcpm_set_state(port, DR_SWAP_CANCEL, 0); - break; - case PR_SWAP_SEND: - port->swap_status = (type == PD_CTRL_WAIT ? - -EAGAIN : -EOPNOTSUPP); - tcpm_set_state(port, PR_SWAP_CANCEL, 0); - break; - case VCONN_SWAP_SEND: - port->swap_status = (type == PD_CTRL_WAIT ? - -EAGAIN : -EOPNOTSUPP); - tcpm_set_state(port, VCONN_SWAP_CANCEL, 0); - break; - default: - break; - } - break; - case PD_CTRL_ACCEPT: - switch (port->state) { - case SNK_NEGOTIATE_CAPABILITIES: - port->pps_data.active = false; - tcpm_set_state(port, SNK_TRANSITION_SINK, 0); - break; - case SNK_NEGOTIATE_PPS_CAPABILITIES: - port->pps_data.active = true; - port->supply_voltage = port->pps_data.out_volt; - port->current_limit = port->pps_data.op_curr; - tcpm_set_state(port, SNK_TRANSITION_SINK, 0); - break; - case SOFT_RESET_SEND: - port->message_id = 0; - port->rx_msgid = -1; - if (port->pwr_role == TYPEC_SOURCE) - next_state = SRC_SEND_CAPABILITIES; - else - next_state = SNK_WAIT_CAPABILITIES; - tcpm_set_state(port, next_state, 0); - break; - case DR_SWAP_SEND: - tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0); - break; - case PR_SWAP_SEND: - tcpm_set_state(port, PR_SWAP_START, 0); - break; - case VCONN_SWAP_SEND: - tcpm_set_state(port, VCONN_SWAP_START, 0); - break; - default: - break; - } - break; - case PD_CTRL_SOFT_RESET: - tcpm_set_state(port, SOFT_RESET, 0); - break; - case PD_CTRL_DR_SWAP: - if (port->port_type != TYPEC_PORT_DRP) { - tcpm_queue_message(port, PD_MSG_CTRL_REJECT); - break; - } - /* - * XXX - * 6.3.9: If an alternate mode is active, a request to swap - * alternate modes shall trigger a port reset. - */ - switch (port->state) { - case SRC_READY: - case SNK_READY: - tcpm_set_state(port, DR_SWAP_ACCEPT, 0); - break; - default: - tcpm_queue_message(port, PD_MSG_CTRL_WAIT); - break; - } - break; - case PD_CTRL_PR_SWAP: - if (port->port_type != TYPEC_PORT_DRP) { - tcpm_queue_message(port, PD_MSG_CTRL_REJECT); - break; - } - switch (port->state) { - case SRC_READY: - case SNK_READY: - tcpm_set_state(port, PR_SWAP_ACCEPT, 0); - break; - default: - tcpm_queue_message(port, PD_MSG_CTRL_WAIT); - break; - } - break; - case PD_CTRL_VCONN_SWAP: - switch (port->state) { - case SRC_READY: - case SNK_READY: - tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0); - break; - default: - tcpm_queue_message(port, PD_MSG_CTRL_WAIT); - break; - } - break; - case PD_CTRL_GET_SOURCE_CAP_EXT: - case PD_CTRL_GET_STATUS: - case PD_CTRL_FR_SWAP: - case PD_CTRL_GET_PPS_STATUS: - case PD_CTRL_GET_COUNTRY_CODES: - /* Currently not supported */ - tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); - break; - default: - tcpm_log(port, "Unhandled ctrl message type %#x", type); - break; - } -} - -static void tcpm_pd_ext_msg_request(struct tcpm_port *port, - const struct pd_message *msg) -{ - enum pd_ext_msg_type type = pd_header_type_le(msg->header); - unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header); - - if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) { - tcpm_log(port, "Unchunked extended messages unsupported"); - return; - } - - if (data_size > PD_EXT_MAX_CHUNK_DATA) { - tcpm_log(port, "Chunk handling not yet supported"); - return; - } - - switch (type) { - case PD_EXT_STATUS: - /* - * If PPS related events raised then get PPS status to clear - * (see USB PD 3.0 Spec, 6.5.2.4) - */ - if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] & - USB_PD_EXT_SDB_PPS_EVENTS) - tcpm_set_state(port, GET_PPS_STATUS_SEND, 0); - else - tcpm_set_state(port, ready_state(port), 0); - break; - case PD_EXT_PPS_STATUS: - /* - * For now the PPS status message is used to clear events - * and nothing more. - */ - tcpm_set_state(port, ready_state(port), 0); - break; - case PD_EXT_SOURCE_CAP_EXT: - case PD_EXT_GET_BATT_CAP: - case PD_EXT_GET_BATT_STATUS: - case PD_EXT_BATT_CAP: - case PD_EXT_GET_MANUFACTURER_INFO: - case PD_EXT_MANUFACTURER_INFO: - case PD_EXT_SECURITY_REQUEST: - case PD_EXT_SECURITY_RESPONSE: - case PD_EXT_FW_UPDATE_REQUEST: - case PD_EXT_FW_UPDATE_RESPONSE: - case PD_EXT_COUNTRY_INFO: - case PD_EXT_COUNTRY_CODES: - tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); - break; - default: - tcpm_log(port, "Unhandled extended message type %#x", type); - break; - } -} - -static void tcpm_pd_rx_handler(struct work_struct *work) -{ - struct pd_rx_event *event = container_of(work, - struct pd_rx_event, work); - const struct pd_message *msg = &event->msg; - unsigned int cnt = pd_header_cnt_le(msg->header); - struct tcpm_port *port = event->port; - - mutex_lock(&port->lock); - - tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header), - port->attached); - - if (port->attached) { - enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); - unsigned int msgid = pd_header_msgid_le(msg->header); - - /* - * USB PD standard, 6.6.1.2: - * "... if MessageID value in a received Message is the - * same as the stored value, the receiver shall return a - * GoodCRC Message with that MessageID value and drop - * the Message (this is a retry of an already received - * Message). Note: this shall not apply to the Soft_Reset - * Message which always has a MessageID value of zero." - */ - if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET) - goto done; - port->rx_msgid = msgid; - - /* - * If both ends believe to be DFP/host, we have a data role - * mismatch. - */ - if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) == - (port->data_role == TYPEC_HOST)) { - tcpm_log(port, - "Data role mismatch, initiating error recovery"); - tcpm_set_state(port, ERROR_RECOVERY, 0); - } else { - if (msg->header & PD_HEADER_EXT_HDR) - tcpm_pd_ext_msg_request(port, msg); - else if (cnt) - tcpm_pd_data_request(port, msg); - else - tcpm_pd_ctrl_request(port, msg); - } - } - -done: - mutex_unlock(&port->lock); - kfree(event); -} - -void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg) -{ - struct pd_rx_event *event; - - event = kzalloc(sizeof(*event), GFP_ATOMIC); - if (!event) - return; - - INIT_WORK(&event->work, tcpm_pd_rx_handler); - event->port = port; - memcpy(&event->msg, msg, sizeof(*msg)); - queue_work(port->wq, &event->work); -} -EXPORT_SYMBOL_GPL(tcpm_pd_receive); - -static int tcpm_pd_send_control(struct tcpm_port *port, - enum pd_ctrl_msg_type type) -{ - struct pd_message msg; - - memset(&msg, 0, sizeof(msg)); - msg.header = PD_HEADER_LE(type, port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, 0); - - return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); -} - -/* - * Send queued message without affecting state. - * Return true if state machine should go back to sleep, - * false otherwise. - */ -static bool tcpm_send_queued_message(struct tcpm_port *port) -{ - enum pd_msg_request queued_message; - - do { - queued_message = port->queued_message; - port->queued_message = PD_MSG_NONE; - - switch (queued_message) { - case PD_MSG_CTRL_WAIT: - tcpm_pd_send_control(port, PD_CTRL_WAIT); - break; - case PD_MSG_CTRL_REJECT: - tcpm_pd_send_control(port, PD_CTRL_REJECT); - break; - case PD_MSG_CTRL_NOT_SUPP: - tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP); - break; - case PD_MSG_DATA_SINK_CAP: - tcpm_pd_send_sink_caps(port); - break; - case PD_MSG_DATA_SOURCE_CAP: - tcpm_pd_send_source_caps(port); - break; - default: - break; - } - } while (port->queued_message != PD_MSG_NONE); - - if (port->delayed_state != INVALID_STATE) { - if (time_is_after_jiffies(port->delayed_runtime)) { - mod_delayed_work(port->wq, &port->state_machine, - port->delayed_runtime - jiffies); - return true; - } - port->delayed_state = INVALID_STATE; - } - return false; -} - -static int tcpm_pd_check_request(struct tcpm_port *port) -{ - u32 pdo, rdo = port->sink_request; - unsigned int max, op, pdo_max, index; - enum pd_pdo_type type; - - index = rdo_index(rdo); - if (!index || index > port->nr_src_pdo) - return -EINVAL; - - pdo = port->src_pdo[index - 1]; - type = pdo_type(pdo); - switch (type) { - case PDO_TYPE_FIXED: - case PDO_TYPE_VAR: - max = rdo_max_current(rdo); - op = rdo_op_current(rdo); - pdo_max = pdo_max_current(pdo); - - if (op > pdo_max) - return -EINVAL; - if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) - return -EINVAL; - - if (type == PDO_TYPE_FIXED) - tcpm_log(port, - "Requested %u mV, %u mA for %u / %u mA", - pdo_fixed_voltage(pdo), pdo_max, op, max); - else - tcpm_log(port, - "Requested %u -> %u mV, %u mA for %u / %u mA", - pdo_min_voltage(pdo), pdo_max_voltage(pdo), - pdo_max, op, max); - break; - case PDO_TYPE_BATT: - max = rdo_max_power(rdo); - op = rdo_op_power(rdo); - pdo_max = pdo_max_power(pdo); - - if (op > pdo_max) - return -EINVAL; - if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) - return -EINVAL; - tcpm_log(port, - "Requested %u -> %u mV, %u mW for %u / %u mW", - pdo_min_voltage(pdo), pdo_max_voltage(pdo), - pdo_max, op, max); - break; - default: - return -EINVAL; - } - - port->op_vsafe5v = index == 1; - - return 0; -} - -#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y)) -#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y)) - -static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, - int *src_pdo) -{ - unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0, - max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0, - min_snk_mv = 0; - int ret = -EINVAL; - - port->pps_data.supported = false; - port->usb_type = POWER_SUPPLY_USB_TYPE_PD; - - /* - * Select the source PDO providing the most power which has a - * matchig sink cap. - */ - for (i = 0; i < port->nr_source_caps; i++) { - u32 pdo = port->source_caps[i]; - enum pd_pdo_type type = pdo_type(pdo); - - switch (type) { - case PDO_TYPE_FIXED: - max_src_mv = pdo_fixed_voltage(pdo); - min_src_mv = max_src_mv; - break; - case PDO_TYPE_BATT: - case PDO_TYPE_VAR: - max_src_mv = pdo_max_voltage(pdo); - min_src_mv = pdo_min_voltage(pdo); - break; - case PDO_TYPE_APDO: - if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) { - port->pps_data.supported = true; - port->usb_type = - POWER_SUPPLY_USB_TYPE_PD_PPS; - } - continue; - default: - tcpm_log(port, "Invalid source PDO type, ignoring"); - continue; - } - - switch (type) { - case PDO_TYPE_FIXED: - case PDO_TYPE_VAR: - src_ma = pdo_max_current(pdo); - src_mw = src_ma * min_src_mv / 1000; - break; - case PDO_TYPE_BATT: - src_mw = pdo_max_power(pdo); - break; - case PDO_TYPE_APDO: - continue; - default: - tcpm_log(port, "Invalid source PDO type, ignoring"); - continue; - } - - for (j = 0; j < port->nr_snk_pdo; j++) { - pdo = port->snk_pdo[j]; - - switch (pdo_type(pdo)) { - case PDO_TYPE_FIXED: - max_snk_mv = pdo_fixed_voltage(pdo); - min_snk_mv = max_snk_mv; - break; - case PDO_TYPE_BATT: - case PDO_TYPE_VAR: - max_snk_mv = pdo_max_voltage(pdo); - min_snk_mv = pdo_min_voltage(pdo); - break; - case PDO_TYPE_APDO: - continue; - default: - tcpm_log(port, "Invalid sink PDO type, ignoring"); - continue; - } - - if (max_src_mv <= max_snk_mv && - min_src_mv >= min_snk_mv) { - /* Prefer higher voltages if available */ - if ((src_mw == max_mw && min_src_mv > max_mv) || - src_mw > max_mw) { - *src_pdo = i; - *sink_pdo = j; - max_mw = src_mw; - max_mv = min_src_mv; - ret = 0; - } - } - } - } - - return ret; -} - -#define min_pps_apdo_current(x, y) \ - min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y)) - -static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port) -{ - unsigned int i, j, max_mw = 0, max_mv = 0; - unsigned int min_src_mv, max_src_mv, src_ma, src_mw; - unsigned int min_snk_mv, max_snk_mv, snk_ma; - u32 pdo; - unsigned int src_pdo = 0, snk_pdo = 0; - - /* - * Select the source PPS APDO providing the most power while staying - * within the board's limits. We skip the first PDO as this is always - * 5V 3A. - */ - for (i = 1; i < port->nr_source_caps; ++i) { - pdo = port->source_caps[i]; - - switch (pdo_type(pdo)) { - case PDO_TYPE_APDO: - if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { - tcpm_log(port, "Not PPS APDO (source), ignoring"); - continue; - } - - min_src_mv = pdo_pps_apdo_min_voltage(pdo); - max_src_mv = pdo_pps_apdo_max_voltage(pdo); - src_ma = pdo_pps_apdo_max_current(pdo); - src_mw = (src_ma * max_src_mv) / 1000; - - /* - * Now search through the sink PDOs to find a matching - * PPS APDO. Again skip the first sink PDO as this will - * always be 5V 3A. - */ - for (j = 1; j < port->nr_snk_pdo; j++) { - pdo = port->snk_pdo[j]; - - switch (pdo_type(pdo)) { - case PDO_TYPE_APDO: - if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { - tcpm_log(port, - "Not PPS APDO (sink), ignoring"); - continue; - } - - min_snk_mv = - pdo_pps_apdo_min_voltage(pdo); - max_snk_mv = - pdo_pps_apdo_max_voltage(pdo); - snk_ma = - pdo_pps_apdo_max_current(pdo); - break; - default: - tcpm_log(port, - "Not APDO type (sink), ignoring"); - continue; - } - - if (max_src_mv <= max_snk_mv && - min_src_mv >= min_snk_mv) { - /* Prefer higher voltages if available */ - if ((src_mw == max_mw && - min_src_mv > max_mv) || - src_mw > max_mw) { - src_pdo = i; - snk_pdo = j; - max_mw = src_mw; - max_mv = max_src_mv; - } - } - } - - break; - default: - tcpm_log(port, "Not APDO type (source), ignoring"); - continue; - } - } - - if (src_pdo) { - pdo = port->source_caps[src_pdo]; - - port->pps_data.min_volt = pdo_pps_apdo_min_voltage(pdo); - port->pps_data.max_volt = pdo_pps_apdo_max_voltage(pdo); - port->pps_data.max_curr = - min_pps_apdo_current(pdo, port->snk_pdo[snk_pdo]); - port->pps_data.out_volt = - min(pdo_pps_apdo_max_voltage(pdo), port->pps_data.out_volt); - port->pps_data.op_curr = - min(port->pps_data.max_curr, port->pps_data.op_curr); - } - - return src_pdo; -} - -static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) -{ - unsigned int mv, ma, mw, flags; - unsigned int max_ma, max_mw; - enum pd_pdo_type type; - u32 pdo, matching_snk_pdo; - int src_pdo_index = 0; - int snk_pdo_index = 0; - int ret; - - ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index); - if (ret < 0) - return ret; - - pdo = port->source_caps[src_pdo_index]; - matching_snk_pdo = port->snk_pdo[snk_pdo_index]; - type = pdo_type(pdo); - - switch (type) { - case PDO_TYPE_FIXED: - mv = pdo_fixed_voltage(pdo); - break; - case PDO_TYPE_BATT: - case PDO_TYPE_VAR: - mv = pdo_min_voltage(pdo); - break; - default: - tcpm_log(port, "Invalid PDO selected!"); - return -EINVAL; - } - - /* Select maximum available current within the sink pdo's limit */ - if (type == PDO_TYPE_BATT) { - mw = min_power(pdo, matching_snk_pdo); - ma = 1000 * mw / mv; - } else { - ma = min_current(pdo, matching_snk_pdo); - mw = ma * mv / 1000; - } - - flags = RDO_USB_COMM | RDO_NO_SUSPEND; - - /* Set mismatch bit if offered power is less than operating power */ - max_ma = ma; - max_mw = mw; - if (mw < port->operating_snk_mw) { - flags |= RDO_CAP_MISMATCH; - if (type == PDO_TYPE_BATT && - (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo))) - max_mw = pdo_max_power(matching_snk_pdo); - else if (pdo_max_current(matching_snk_pdo) > - pdo_max_current(pdo)) - max_ma = pdo_max_current(matching_snk_pdo); - } - - tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", - port->cc_req, port->cc1, port->cc2, port->vbus_source, - port->vconn_role == TYPEC_SOURCE ? "source" : "sink", - port->polarity); - - if (type == PDO_TYPE_BATT) { - *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags); - - tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s", - src_pdo_index, mv, mw, - flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); - } else { - *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags); - - tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s", - src_pdo_index, mv, ma, - flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); - } - - port->current_limit = ma; - port->supply_voltage = mv; - - return 0; -} - -static int tcpm_pd_send_request(struct tcpm_port *port) -{ - struct pd_message msg; - int ret; - u32 rdo; - - ret = tcpm_pd_build_request(port, &rdo); - if (ret < 0) - return ret; - - memset(&msg, 0, sizeof(msg)); - msg.header = PD_HEADER_LE(PD_DATA_REQUEST, - port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, 1); - msg.payload[0] = cpu_to_le32(rdo); - - return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); -} - -static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo) -{ - unsigned int out_mv, op_ma, op_mw, min_mv, max_mv, max_ma, flags; - enum pd_pdo_type type; - unsigned int src_pdo_index; - u32 pdo; - - src_pdo_index = tcpm_pd_select_pps_apdo(port); - if (!src_pdo_index) - return -EOPNOTSUPP; - - pdo = port->source_caps[src_pdo_index]; - type = pdo_type(pdo); - - switch (type) { - case PDO_TYPE_APDO: - if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { - tcpm_log(port, "Invalid APDO selected!"); - return -EINVAL; - } - min_mv = port->pps_data.min_volt; - max_mv = port->pps_data.max_volt; - max_ma = port->pps_data.max_curr; - out_mv = port->pps_data.out_volt; - op_ma = port->pps_data.op_curr; - break; - default: - tcpm_log(port, "Invalid PDO selected!"); - return -EINVAL; - } - - flags = RDO_USB_COMM | RDO_NO_SUSPEND; - - op_mw = (op_ma * out_mv) / 1000; - if (op_mw < port->operating_snk_mw) { - /* - * Try raising current to meet power needs. If that's not enough - * then try upping the voltage. If that's still not enough - * then we've obviously chosen a PPS APDO which really isn't - * suitable so abandon ship. - */ - op_ma = (port->operating_snk_mw * 1000) / out_mv; - if ((port->operating_snk_mw * 1000) % out_mv) - ++op_ma; - op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP); - - if (op_ma > max_ma) { - op_ma = max_ma; - out_mv = (port->operating_snk_mw * 1000) / op_ma; - if ((port->operating_snk_mw * 1000) % op_ma) - ++out_mv; - out_mv += RDO_PROG_VOLT_MV_STEP - - (out_mv % RDO_PROG_VOLT_MV_STEP); - - if (out_mv > max_mv) { - tcpm_log(port, "Invalid PPS APDO selected!"); - return -EINVAL; - } - } - } - - tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", - port->cc_req, port->cc1, port->cc2, port->vbus_source, - port->vconn_role == TYPEC_SOURCE ? "source" : "sink", - port->polarity); - - *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags); - - tcpm_log(port, "Requesting APDO %d: %u mV, %u mA", - src_pdo_index, out_mv, op_ma); - - port->pps_data.op_curr = op_ma; - port->pps_data.out_volt = out_mv; - - return 0; -} - -static int tcpm_pd_send_pps_request(struct tcpm_port *port) -{ - struct pd_message msg; - int ret; - u32 rdo; - - ret = tcpm_pd_build_pps_request(port, &rdo); - if (ret < 0) - return ret; - - memset(&msg, 0, sizeof(msg)); - msg.header = PD_HEADER_LE(PD_DATA_REQUEST, - port->pwr_role, - port->data_role, - port->negotiated_rev, - port->message_id, 1); - msg.payload[0] = cpu_to_le32(rdo); - - return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); -} - -static int tcpm_set_vbus(struct tcpm_port *port, bool enable) -{ - int ret; - - if (enable && port->vbus_charge) - return -EINVAL; - - tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge); - - ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge); - if (ret < 0) - return ret; - - port->vbus_source = enable; - return 0; -} - -static int tcpm_set_charge(struct tcpm_port *port, bool charge) -{ - int ret; - - if (charge && port->vbus_source) - return -EINVAL; - - if (charge != port->vbus_charge) { - tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge); - ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source, - charge); - if (ret < 0) - return ret; - } - port->vbus_charge = charge; - return 0; -} - -static bool tcpm_start_drp_toggling(struct tcpm_port *port, - enum typec_cc_status cc) -{ - int ret; - - if (port->tcpc->start_drp_toggling && - port->port_type == TYPEC_PORT_DRP) { - tcpm_log_force(port, "Start DRP toggling"); - ret = port->tcpc->start_drp_toggling(port->tcpc, cc); - if (!ret) - return true; - } - - return false; -} - -static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc) -{ - tcpm_log(port, "cc:=%d", cc); - port->cc_req = cc; - port->tcpc->set_cc(port->tcpc, cc); -} - -static int tcpm_init_vbus(struct tcpm_port *port) -{ - int ret; - - ret = port->tcpc->set_vbus(port->tcpc, false, false); - port->vbus_source = false; - port->vbus_charge = false; - return ret; -} - -static int tcpm_init_vconn(struct tcpm_port *port) -{ - int ret; - - ret = port->tcpc->set_vconn(port->tcpc, false); - port->vconn_role = TYPEC_SINK; - return ret; -} - -static void tcpm_typec_connect(struct tcpm_port *port) -{ - if (!port->connected) { - /* Make sure we don't report stale identity information */ - memset(&port->partner_ident, 0, sizeof(port->partner_ident)); - port->partner_desc.usb_pd = port->pd_capable; - if (tcpm_port_is_debug(port)) - port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG; - else if (tcpm_port_is_audio(port)) - port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO; - else - port->partner_desc.accessory = TYPEC_ACCESSORY_NONE; - port->partner = typec_register_partner(port->typec_port, - &port->partner_desc); - port->connected = true; - } -} - -static int tcpm_src_attach(struct tcpm_port *port) -{ - enum typec_cc_polarity polarity = - port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2 - : TYPEC_POLARITY_CC1; - int ret; - - if (port->attached) - return 0; - - ret = tcpm_set_polarity(port, polarity); - if (ret < 0) - return ret; - - ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST); - if (ret < 0) - return ret; - - ret = port->tcpc->set_pd_rx(port->tcpc, true); - if (ret < 0) - goto out_disable_mux; - - /* - * USB Type-C specification, version 1.2, - * chapter 4.5.2.2.8.1 (Attached.SRC Requirements) - * Enable VCONN only if the non-RD port is set to RA. - */ - if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) || - (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) { - ret = tcpm_set_vconn(port, true); - if (ret < 0) - goto out_disable_pd; - } - - ret = tcpm_set_vbus(port, true); - if (ret < 0) - goto out_disable_vconn; - - port->pd_capable = false; - - port->partner = NULL; - - port->attached = true; - port->send_discover = true; - - return 0; - -out_disable_vconn: - tcpm_set_vconn(port, false); -out_disable_pd: - port->tcpc->set_pd_rx(port->tcpc, false); -out_disable_mux: - tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, - TYPEC_ORIENTATION_NONE); - return ret; -} - -static void tcpm_typec_disconnect(struct tcpm_port *port) -{ - if (port->connected) { - typec_unregister_partner(port->partner); - port->partner = NULL; - port->connected = false; - } -} - -static void tcpm_unregister_altmodes(struct tcpm_port *port) -{ - struct pd_mode_data *modep = &port->mode_data; - int i; - - for (i = 0; i < modep->altmodes; i++) { - typec_unregister_altmode(port->partner_altmode[i]); - port->partner_altmode[i] = NULL; - } - - memset(modep, 0, sizeof(*modep)); -} - -static void tcpm_reset_port(struct tcpm_port *port) -{ - tcpm_unregister_altmodes(port); - tcpm_typec_disconnect(port); - port->attached = false; - port->pd_capable = false; - port->pps_data.supported = false; - - /* - * First Rx ID should be 0; set this to a sentinel of -1 so that - * we can check tcpm_pd_rx_handler() if we had seen it before. - */ - port->rx_msgid = -1; - - port->tcpc->set_pd_rx(port->tcpc, false); - tcpm_init_vbus(port); /* also disables charging */ - tcpm_init_vconn(port); - tcpm_set_current_limit(port, 0, 0); - tcpm_set_polarity(port, TYPEC_POLARITY_CC1); - tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, - TYPEC_ORIENTATION_NONE); - tcpm_set_attached_state(port, false); - port->try_src_count = 0; - port->try_snk_count = 0; - port->usb_type = POWER_SUPPLY_USB_TYPE_C; - - power_supply_changed(port->psy); -} - -static void tcpm_detach(struct tcpm_port *port) -{ - if (!port->attached) - return; - - if (tcpm_port_is_disconnected(port)) - port->hard_reset_count = 0; - - tcpm_reset_port(port); -} - -static void tcpm_src_detach(struct tcpm_port *port) -{ - tcpm_detach(port); -} - -static int tcpm_snk_attach(struct tcpm_port *port) -{ - int ret; - - if (port->attached) - return 0; - - ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ? - TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1); - if (ret < 0) - return ret; - - ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE); - if (ret < 0) - return ret; - - port->pd_capable = false; - - port->partner = NULL; - - port->attached = true; - port->send_discover = true; - - return 0; -} - -static void tcpm_snk_detach(struct tcpm_port *port) -{ - tcpm_detach(port); -} - -static int tcpm_acc_attach(struct tcpm_port *port) -{ - int ret; - - if (port->attached) - return 0; - - ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST); - if (ret < 0) - return ret; - - port->partner = NULL; - - tcpm_typec_connect(port); - - port->attached = true; - - return 0; -} - -static void tcpm_acc_detach(struct tcpm_port *port) -{ - tcpm_detach(port); -} - -static inline enum tcpm_state hard_reset_state(struct tcpm_port *port) -{ - if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) - return HARD_RESET_SEND; - if (port->pd_capable) - return ERROR_RECOVERY; - if (port->pwr_role == TYPEC_SOURCE) - return SRC_UNATTACHED; - if (port->state == SNK_WAIT_CAPABILITIES) - return SNK_READY; - return SNK_UNATTACHED; -} - -static inline enum tcpm_state unattached_state(struct tcpm_port *port) -{ - if (port->port_type == TYPEC_PORT_DRP) { - if (port->pwr_role == TYPEC_SOURCE) - return SRC_UNATTACHED; - else - return SNK_UNATTACHED; - } else if (port->port_type == TYPEC_PORT_SRC) { - return SRC_UNATTACHED; - } - - return SNK_UNATTACHED; -} - -static void tcpm_check_send_discover(struct tcpm_port *port) -{ - if (port->data_role == TYPEC_HOST && port->send_discover && - port->pd_capable) { - tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0); - port->send_discover = false; - } -} - -static void tcpm_swap_complete(struct tcpm_port *port, int result) -{ - if (port->swap_pending) { - port->swap_status = result; - port->swap_pending = false; - port->non_pd_role_swap = false; - complete(&port->swap_complete); - } -} - -static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc) -{ - switch (cc) { - case TYPEC_CC_RP_1_5: - return TYPEC_PWR_MODE_1_5A; - case TYPEC_CC_RP_3_0: - return TYPEC_PWR_MODE_3_0A; - case TYPEC_CC_RP_DEF: - default: - return TYPEC_PWR_MODE_USB; - } -} - -static void run_state_machine(struct tcpm_port *port) -{ - int ret; - enum typec_pwr_opmode opmode; - unsigned int msecs; - - port->enter_state = port->state; - switch (port->state) { - case DRP_TOGGLING: - break; - /* SRC states */ - case SRC_UNATTACHED: - if (!port->non_pd_role_swap) - tcpm_swap_complete(port, -ENOTCONN); - tcpm_src_detach(port); - if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) { - tcpm_set_state(port, DRP_TOGGLING, 0); - break; - } - tcpm_set_cc(port, tcpm_rp_cc(port)); - if (port->port_type == TYPEC_PORT_DRP) - tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK); - break; - case SRC_ATTACH_WAIT: - if (tcpm_port_is_debug(port)) - tcpm_set_state(port, DEBUG_ACC_ATTACHED, - PD_T_CC_DEBOUNCE); - else if (tcpm_port_is_audio(port)) - tcpm_set_state(port, AUDIO_ACC_ATTACHED, - PD_T_CC_DEBOUNCE); - else if (tcpm_port_is_source(port)) - tcpm_set_state(port, - tcpm_try_snk(port) ? SNK_TRY - : SRC_ATTACHED, - PD_T_CC_DEBOUNCE); - break; - - case SNK_TRY: - port->try_snk_count++; - /* - * Requirements: - * - Do not drive vconn or vbus - * - Terminate CC pins (both) to Rd - * Action: - * - Wait for tDRPTry (PD_T_DRP_TRY). - * Until then, ignore any state changes. - */ - tcpm_set_cc(port, TYPEC_CC_RD); - tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY); - break; - case SNK_TRY_WAIT: - if (tcpm_port_is_sink(port)) { - tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0); - } else { - tcpm_set_state(port, SRC_TRYWAIT, 0); - port->max_wait = 0; - } - break; - case SNK_TRY_WAIT_DEBOUNCE: - tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS, - PD_T_PD_DEBOUNCE); - break; - case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS: - if (port->vbus_present && tcpm_port_is_sink(port)) { - tcpm_set_state(port, SNK_ATTACHED, 0); - } else { - tcpm_set_state(port, SRC_TRYWAIT, 0); - port->max_wait = 0; - } - break; - case SRC_TRYWAIT: - tcpm_set_cc(port, tcpm_rp_cc(port)); - if (port->max_wait == 0) { - port->max_wait = jiffies + - msecs_to_jiffies(PD_T_DRP_TRY); - tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, - PD_T_DRP_TRY); - } else { - if (time_is_after_jiffies(port->max_wait)) - tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, - jiffies_to_msecs(port->max_wait - - jiffies)); - else - tcpm_set_state(port, SNK_UNATTACHED, 0); - } - break; - case SRC_TRYWAIT_DEBOUNCE: - tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE); - break; - case SRC_TRYWAIT_UNATTACHED: - tcpm_set_state(port, SNK_UNATTACHED, 0); - break; - - case SRC_ATTACHED: - ret = tcpm_src_attach(port); - tcpm_set_state(port, SRC_UNATTACHED, - ret < 0 ? 0 : PD_T_PS_SOURCE_ON); - break; - case SRC_STARTUP: - opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port)); - typec_set_pwr_opmode(port->typec_port, opmode); - port->pwr_opmode = TYPEC_PWR_MODE_USB; - port->caps_count = 0; - port->negotiated_rev = PD_MAX_REV; - port->message_id = 0; - port->rx_msgid = -1; - port->explicit_contract = false; - tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); - break; - case SRC_SEND_CAPABILITIES: - port->caps_count++; - if (port->caps_count > PD_N_CAPS_COUNT) { - tcpm_set_state(port, SRC_READY, 0); - break; - } - ret = tcpm_pd_send_source_caps(port); - if (ret < 0) { - tcpm_set_state(port, SRC_SEND_CAPABILITIES, - PD_T_SEND_SOURCE_CAP); - } else { - /* - * Per standard, we should clear the reset counter here. - * However, that can result in state machine hang-ups. - * Reset it only in READY state to improve stability. - */ - /* port->hard_reset_count = 0; */ - port->caps_count = 0; - port->pd_capable = true; - tcpm_set_state_cond(port, hard_reset_state(port), - PD_T_SEND_SOURCE_CAP); - } - break; - case SRC_NEGOTIATE_CAPABILITIES: - ret = tcpm_pd_check_request(port); - if (ret < 0) { - tcpm_pd_send_control(port, PD_CTRL_REJECT); - if (!port->explicit_contract) { - tcpm_set_state(port, - SRC_WAIT_NEW_CAPABILITIES, 0); - } else { - tcpm_set_state(port, SRC_READY, 0); - } - } else { - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); - tcpm_set_state(port, SRC_TRANSITION_SUPPLY, - PD_T_SRC_TRANSITION); - } - break; - case SRC_TRANSITION_SUPPLY: - /* XXX: regulator_set_voltage(vbus, ...) */ - tcpm_pd_send_control(port, PD_CTRL_PS_RDY); - port->explicit_contract = true; - typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD); - port->pwr_opmode = TYPEC_PWR_MODE_PD; - tcpm_set_state_cond(port, SRC_READY, 0); - break; - case SRC_READY: -#if 1 - port->hard_reset_count = 0; -#endif - port->try_src_count = 0; - - tcpm_swap_complete(port, 0); - tcpm_typec_connect(port); - - tcpm_check_send_discover(port); - /* - * 6.3.5 - * Sending ping messages is not necessary if - * - the source operates at vSafe5V - * or - * - The system is not operating in PD mode - * or - * - Both partners are connected using a Type-C connector - * - * There is no actual need to send PD messages since the local - * port type-c and the spec does not clearly say whether PD is - * possible when type-c is connected to Type-A/B - */ - break; - case SRC_WAIT_NEW_CAPABILITIES: - /* Nothing to do... */ - break; - - /* SNK states */ - case SNK_UNATTACHED: - if (!port->non_pd_role_swap) - tcpm_swap_complete(port, -ENOTCONN); - tcpm_pps_complete(port, -ENOTCONN); - tcpm_snk_detach(port); - if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) { - tcpm_set_state(port, DRP_TOGGLING, 0); - break; - } - tcpm_set_cc(port, TYPEC_CC_RD); - if (port->port_type == TYPEC_PORT_DRP) - tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC); - break; - case SNK_ATTACH_WAIT: - if ((port->cc1 == TYPEC_CC_OPEN && - port->cc2 != TYPEC_CC_OPEN) || - (port->cc1 != TYPEC_CC_OPEN && - port->cc2 == TYPEC_CC_OPEN)) - tcpm_set_state(port, SNK_DEBOUNCED, - PD_T_CC_DEBOUNCE); - else if (tcpm_port_is_disconnected(port)) - tcpm_set_state(port, SNK_UNATTACHED, - PD_T_PD_DEBOUNCE); - break; - case SNK_DEBOUNCED: - if (tcpm_port_is_disconnected(port)) - tcpm_set_state(port, SNK_UNATTACHED, - PD_T_PD_DEBOUNCE); - else if (port->vbus_present) - tcpm_set_state(port, - tcpm_try_src(port) ? SRC_TRY - : SNK_ATTACHED, - 0); - else - /* Wait for VBUS, but not forever */ - tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON); - break; - - case SRC_TRY: - port->try_src_count++; - tcpm_set_cc(port, tcpm_rp_cc(port)); - port->max_wait = 0; - tcpm_set_state(port, SRC_TRY_WAIT, 0); - break; - case SRC_TRY_WAIT: - if (port->max_wait == 0) { - port->max_wait = jiffies + - msecs_to_jiffies(PD_T_DRP_TRY); - msecs = PD_T_DRP_TRY; - } else { - if (time_is_after_jiffies(port->max_wait)) - msecs = jiffies_to_msecs(port->max_wait - - jiffies); - else - msecs = 0; - } - tcpm_set_state(port, SNK_TRYWAIT, msecs); - break; - case SRC_TRY_DEBOUNCE: - tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE); - break; - case SNK_TRYWAIT: - tcpm_set_cc(port, TYPEC_CC_RD); - tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE); - break; - case SNK_TRYWAIT_VBUS: - /* - * TCPM stays in this state indefinitely until VBUS - * is detected as long as Rp is not detected for - * more than a time period of tPDDebounce. - */ - if (port->vbus_present && tcpm_port_is_sink(port)) { - tcpm_set_state(port, SNK_ATTACHED, 0); - break; - } - if (!tcpm_port_is_sink(port)) - tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0); - break; - case SNK_TRYWAIT_DEBOUNCE: - tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); - break; - case SNK_ATTACHED: - ret = tcpm_snk_attach(port); - if (ret < 0) - tcpm_set_state(port, SNK_UNATTACHED, 0); - else - tcpm_set_state(port, SNK_STARTUP, 0); - break; - case SNK_STARTUP: - opmode = tcpm_get_pwr_opmode(port->polarity ? - port->cc2 : port->cc1); - typec_set_pwr_opmode(port->typec_port, opmode); - port->pwr_opmode = TYPEC_PWR_MODE_USB; - port->negotiated_rev = PD_MAX_REV; - port->message_id = 0; - port->rx_msgid = -1; - port->explicit_contract = false; - tcpm_set_state(port, SNK_DISCOVERY, 0); - break; - case SNK_DISCOVERY: - if (port->vbus_present) { - tcpm_set_current_limit(port, - tcpm_get_current_limit(port), - 5000); - tcpm_set_charge(port, true); - tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); - break; - } - /* - * For DRP, timeouts differ. Also, handling is supposed to be - * different and much more complex (dead battery detection; - * see USB power delivery specification, section 8.3.3.6.1.5.1). - */ - tcpm_set_state(port, hard_reset_state(port), - port->port_type == TYPEC_PORT_DRP ? - PD_T_DB_DETECT : PD_T_NO_RESPONSE); - break; - case SNK_DISCOVERY_DEBOUNCE: - tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE, - PD_T_CC_DEBOUNCE); - break; - case SNK_DISCOVERY_DEBOUNCE_DONE: - if (!tcpm_port_is_disconnected(port) && - tcpm_port_is_sink(port) && - time_is_after_jiffies(port->delayed_runtime)) { - tcpm_set_state(port, SNK_DISCOVERY, - jiffies_to_msecs(port->delayed_runtime - - jiffies)); - break; - } - tcpm_set_state(port, unattached_state(port), 0); - break; - case SNK_WAIT_CAPABILITIES: - ret = port->tcpc->set_pd_rx(port->tcpc, true); - if (ret < 0) { - tcpm_set_state(port, SNK_READY, 0); - break; - } - /* - * If VBUS has never been low, and we time out waiting - * for source cap, try a soft reset first, in case we - * were already in a stable contract before this boot. - * Do this only once. - */ - if (port->vbus_never_low) { - port->vbus_never_low = false; - tcpm_set_state(port, SOFT_RESET_SEND, - PD_T_SINK_WAIT_CAP); - } else { - tcpm_set_state(port, hard_reset_state(port), - PD_T_SINK_WAIT_CAP); - } - break; - case SNK_NEGOTIATE_CAPABILITIES: - port->pd_capable = true; - port->hard_reset_count = 0; - ret = tcpm_pd_send_request(port); - if (ret < 0) { - /* Let the Source send capabilities again. */ - tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); - } else { - tcpm_set_state_cond(port, hard_reset_state(port), - PD_T_SENDER_RESPONSE); - } - break; - case SNK_NEGOTIATE_PPS_CAPABILITIES: - ret = tcpm_pd_send_pps_request(port); - if (ret < 0) { - port->pps_status = ret; - /* - * If this was called due to updates to sink - * capabilities, and pps is no longer valid, we should - * safely fall back to a standard PDO. - */ - if (port->update_sink_caps) - tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); - else - tcpm_set_state(port, SNK_READY, 0); - } else { - tcpm_set_state_cond(port, hard_reset_state(port), - PD_T_SENDER_RESPONSE); - } - break; - case SNK_TRANSITION_SINK: - case SNK_TRANSITION_SINK_VBUS: - tcpm_set_state(port, hard_reset_state(port), - PD_T_PS_TRANSITION); - break; - case SNK_READY: - port->try_snk_count = 0; - port->update_sink_caps = false; - if (port->explicit_contract) { - typec_set_pwr_opmode(port->typec_port, - TYPEC_PWR_MODE_PD); - port->pwr_opmode = TYPEC_PWR_MODE_PD; - } - - tcpm_swap_complete(port, 0); - tcpm_typec_connect(port); - tcpm_check_send_discover(port); - tcpm_pps_complete(port, port->pps_status); - - power_supply_changed(port->psy); - - break; - - /* Accessory states */ - case ACC_UNATTACHED: - tcpm_acc_detach(port); - tcpm_set_state(port, SRC_UNATTACHED, 0); - break; - case DEBUG_ACC_ATTACHED: - case AUDIO_ACC_ATTACHED: - ret = tcpm_acc_attach(port); - if (ret < 0) - tcpm_set_state(port, ACC_UNATTACHED, 0); - break; - case AUDIO_ACC_DEBOUNCE: - tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE); - break; - - /* Hard_Reset states */ - case HARD_RESET_SEND: - tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL); - tcpm_set_state(port, HARD_RESET_START, 0); - break; - case HARD_RESET_START: - port->hard_reset_count++; - port->tcpc->set_pd_rx(port->tcpc, false); - tcpm_unregister_altmodes(port); - port->send_discover = true; - if (port->pwr_role == TYPEC_SOURCE) - tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF, - PD_T_PS_HARD_RESET); - else - tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0); - break; - case SRC_HARD_RESET_VBUS_OFF: - tcpm_set_vconn(port, true); - tcpm_set_vbus(port, false); - tcpm_set_roles(port, false, TYPEC_SOURCE, TYPEC_HOST); - tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER); - break; - case SRC_HARD_RESET_VBUS_ON: - tcpm_set_vbus(port, true); - port->tcpc->set_pd_rx(port->tcpc, true); - tcpm_set_attached_state(port, true); - tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON); - break; - case SNK_HARD_RESET_SINK_OFF: - memset(&port->pps_data, 0, sizeof(port->pps_data)); - tcpm_set_vconn(port, false); - tcpm_set_charge(port, false); - tcpm_set_roles(port, false, TYPEC_SINK, TYPEC_DEVICE); - /* - * VBUS may or may not toggle, depending on the adapter. - * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON - * directly after timeout. - */ - tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V); - break; - case SNK_HARD_RESET_WAIT_VBUS: - /* Assume we're disconnected if VBUS doesn't come back. */ - tcpm_set_state(port, SNK_UNATTACHED, - PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON); - break; - case SNK_HARD_RESET_SINK_ON: - /* Note: There is no guarantee that VBUS is on in this state */ - /* - * XXX: - * The specification suggests that dual mode ports in sink - * mode should transition to state PE_SRC_Transition_to_default. - * See USB power delivery specification chapter 8.3.3.6.1.3. - * This would mean to to - * - turn off VCONN, reset power supply - * - request hardware reset - * - turn on VCONN - * - Transition to state PE_Src_Startup - * SNK only ports shall transition to state Snk_Startup - * (see chapter 8.3.3.3.8). - * Similar, dual-mode ports in source mode should transition - * to PE_SNK_Transition_to_default. - */ - tcpm_set_attached_state(port, true); - tcpm_set_state(port, SNK_STARTUP, 0); - break; - - /* Soft_Reset states */ - case SOFT_RESET: - port->message_id = 0; - port->rx_msgid = -1; - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); - if (port->pwr_role == TYPEC_SOURCE) - tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); - else - tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); - break; - case SOFT_RESET_SEND: - port->message_id = 0; - port->rx_msgid = -1; - if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET)) - tcpm_set_state_cond(port, hard_reset_state(port), 0); - else - tcpm_set_state_cond(port, hard_reset_state(port), - PD_T_SENDER_RESPONSE); - break; - - /* DR_Swap states */ - case DR_SWAP_SEND: - tcpm_pd_send_control(port, PD_CTRL_DR_SWAP); - tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT, - PD_T_SENDER_RESPONSE); - break; - case DR_SWAP_ACCEPT: - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); - tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0); - break; - case DR_SWAP_SEND_TIMEOUT: - tcpm_swap_complete(port, -ETIMEDOUT); - tcpm_set_state(port, ready_state(port), 0); - break; - case DR_SWAP_CHANGE_DR: - if (port->data_role == TYPEC_HOST) { - tcpm_unregister_altmodes(port); - tcpm_set_roles(port, true, port->pwr_role, - TYPEC_DEVICE); - } else { - tcpm_set_roles(port, true, port->pwr_role, - TYPEC_HOST); - port->send_discover = true; - } - tcpm_set_state(port, ready_state(port), 0); - break; - - /* PR_Swap states */ - case PR_SWAP_ACCEPT: - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); - tcpm_set_state(port, PR_SWAP_START, 0); - break; - case PR_SWAP_SEND: - tcpm_pd_send_control(port, PD_CTRL_PR_SWAP); - tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT, - PD_T_SENDER_RESPONSE); - break; - case PR_SWAP_SEND_TIMEOUT: - tcpm_swap_complete(port, -ETIMEDOUT); - tcpm_set_state(port, ready_state(port), 0); - break; - case PR_SWAP_START: - if (port->pwr_role == TYPEC_SOURCE) - tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF, - PD_T_SRC_TRANSITION); - else - tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0); - break; - case PR_SWAP_SRC_SNK_TRANSITION_OFF: - tcpm_set_vbus(port, false); - port->explicit_contract = false; - /* allow time for Vbus discharge, must be < tSrcSwapStdby */ - tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, - PD_T_SRCSWAPSTDBY); - break; - case PR_SWAP_SRC_SNK_SOURCE_OFF: - tcpm_set_cc(port, TYPEC_CC_RD); - /* allow CC debounce */ - tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED, - PD_T_CC_DEBOUNCE); - break; - case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: - /* - * USB-PD standard, 6.2.1.4, Port Power Role: - * "During the Power Role Swap Sequence, for the initial Source - * Port, the Port Power Role field shall be set to Sink in the - * PS_RDY Message indicating that the initial Source’s power - * supply is turned off" - */ - tcpm_set_pwr_role(port, TYPEC_SINK); - if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) { - tcpm_set_state(port, ERROR_RECOVERY, 0); - break; - } - tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON); - break; - case PR_SWAP_SRC_SNK_SINK_ON: - tcpm_set_state(port, SNK_STARTUP, 0); - break; - case PR_SWAP_SNK_SRC_SINK_OFF: - tcpm_set_charge(port, false); - tcpm_set_state(port, hard_reset_state(port), - PD_T_PS_SOURCE_OFF); - break; - case PR_SWAP_SNK_SRC_SOURCE_ON: - tcpm_set_cc(port, tcpm_rp_cc(port)); - tcpm_set_vbus(port, true); - /* - * allow time VBUS ramp-up, must be < tNewSrc - * Also, this window overlaps with CC debounce as well. - * So, Wait for the max of two which is PD_T_NEWSRC - */ - tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP, - PD_T_NEWSRC); - break; - case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP: - /* - * USB PD standard, 6.2.1.4: - * "Subsequent Messages initiated by the Policy Engine, - * such as the PS_RDY Message sent to indicate that Vbus - * is ready, will have the Port Power Role field set to - * Source." - */ - tcpm_set_pwr_role(port, TYPEC_SOURCE); - tcpm_pd_send_control(port, PD_CTRL_PS_RDY); - tcpm_set_state(port, SRC_STARTUP, 0); - break; - - case VCONN_SWAP_ACCEPT: - tcpm_pd_send_control(port, PD_CTRL_ACCEPT); - tcpm_set_state(port, VCONN_SWAP_START, 0); - break; - case VCONN_SWAP_SEND: - tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP); - tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT, - PD_T_SENDER_RESPONSE); - break; - case VCONN_SWAP_SEND_TIMEOUT: - tcpm_swap_complete(port, -ETIMEDOUT); - tcpm_set_state(port, ready_state(port), 0); - break; - case VCONN_SWAP_START: - if (port->vconn_role == TYPEC_SOURCE) - tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0); - else - tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0); - break; - case VCONN_SWAP_WAIT_FOR_VCONN: - tcpm_set_state(port, hard_reset_state(port), - PD_T_VCONN_SOURCE_ON); - break; - case VCONN_SWAP_TURN_ON_VCONN: - tcpm_set_vconn(port, true); - tcpm_pd_send_control(port, PD_CTRL_PS_RDY); - tcpm_set_state(port, ready_state(port), 0); - break; - case VCONN_SWAP_TURN_OFF_VCONN: - tcpm_set_vconn(port, false); - tcpm_set_state(port, ready_state(port), 0); - break; - - case DR_SWAP_CANCEL: - case PR_SWAP_CANCEL: - case VCONN_SWAP_CANCEL: - tcpm_swap_complete(port, port->swap_status); - if (port->pwr_role == TYPEC_SOURCE) - tcpm_set_state(port, SRC_READY, 0); - else - tcpm_set_state(port, SNK_READY, 0); - break; - - case BIST_RX: - switch (BDO_MODE_MASK(port->bist_request)) { - case BDO_MODE_CARRIER2: - tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL); - break; - default: - break; - } - /* Always switch to unattached state */ - tcpm_set_state(port, unattached_state(port), 0); - break; - case GET_STATUS_SEND: - tcpm_pd_send_control(port, PD_CTRL_GET_STATUS); - tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT, - PD_T_SENDER_RESPONSE); - break; - case GET_STATUS_SEND_TIMEOUT: - tcpm_set_state(port, ready_state(port), 0); - break; - case GET_PPS_STATUS_SEND: - tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS); - tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT, - PD_T_SENDER_RESPONSE); - break; - case GET_PPS_STATUS_SEND_TIMEOUT: - tcpm_set_state(port, ready_state(port), 0); - break; - case ERROR_RECOVERY: - tcpm_swap_complete(port, -EPROTO); - tcpm_pps_complete(port, -EPROTO); - tcpm_set_state(port, PORT_RESET, 0); - break; - case PORT_RESET: - tcpm_reset_port(port); - tcpm_set_cc(port, TYPEC_CC_OPEN); - tcpm_set_state(port, PORT_RESET_WAIT_OFF, - PD_T_ERROR_RECOVERY); - break; - case PORT_RESET_WAIT_OFF: - tcpm_set_state(port, - tcpm_default_state(port), - port->vbus_present ? PD_T_PS_SOURCE_OFF : 0); - break; - default: - WARN(1, "Unexpected port state %d\n", port->state); - break; - } -} - -static void tcpm_state_machine_work(struct work_struct *work) -{ - struct tcpm_port *port = container_of(work, struct tcpm_port, - state_machine.work); - enum tcpm_state prev_state; - - mutex_lock(&port->lock); - port->state_machine_running = true; - - if (port->queued_message && tcpm_send_queued_message(port)) - goto done; - - /* If we were queued due to a delayed state change, update it now */ - if (port->delayed_state) { - tcpm_log(port, "state change %s -> %s [delayed %ld ms]", - tcpm_states[port->state], - tcpm_states[port->delayed_state], port->delay_ms); - port->prev_state = port->state; - port->state = port->delayed_state; - port->delayed_state = INVALID_STATE; - } - - /* - * Continue running as long as we have (non-delayed) state changes - * to make. - */ - do { - prev_state = port->state; - run_state_machine(port); - if (port->queued_message) - tcpm_send_queued_message(port); - } while (port->state != prev_state && !port->delayed_state); - -done: - port->state_machine_running = false; - mutex_unlock(&port->lock); -} - -static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1, - enum typec_cc_status cc2) -{ - enum typec_cc_status old_cc1, old_cc2; - enum tcpm_state new_state; - - old_cc1 = port->cc1; - old_cc2 = port->cc2; - port->cc1 = cc1; - port->cc2 = cc2; - - tcpm_log_force(port, - "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]", - old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state], - port->polarity, - tcpm_port_is_disconnected(port) ? "disconnected" - : "connected"); - - switch (port->state) { - case DRP_TOGGLING: - if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || - tcpm_port_is_source(port)) - tcpm_set_state(port, SRC_ATTACH_WAIT, 0); - else if (tcpm_port_is_sink(port)) - tcpm_set_state(port, SNK_ATTACH_WAIT, 0); - break; - case SRC_UNATTACHED: - case ACC_UNATTACHED: - if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || - tcpm_port_is_source(port)) - tcpm_set_state(port, SRC_ATTACH_WAIT, 0); - break; - case SRC_ATTACH_WAIT: - if (tcpm_port_is_disconnected(port) || - tcpm_port_is_audio_detached(port)) - tcpm_set_state(port, SRC_UNATTACHED, 0); - else if (cc1 != old_cc1 || cc2 != old_cc2) - tcpm_set_state(port, SRC_ATTACH_WAIT, 0); - break; - case SRC_ATTACHED: - case SRC_SEND_CAPABILITIES: - case SRC_READY: - if (tcpm_port_is_disconnected(port) || - !tcpm_port_is_source(port)) - tcpm_set_state(port, SRC_UNATTACHED, 0); - break; - case SNK_UNATTACHED: - if (tcpm_port_is_sink(port)) - tcpm_set_state(port, SNK_ATTACH_WAIT, 0); - break; - case SNK_ATTACH_WAIT: - if ((port->cc1 == TYPEC_CC_OPEN && - port->cc2 != TYPEC_CC_OPEN) || - (port->cc1 != TYPEC_CC_OPEN && - port->cc2 == TYPEC_CC_OPEN)) - new_state = SNK_DEBOUNCED; - else if (tcpm_port_is_disconnected(port)) - new_state = SNK_UNATTACHED; - else - break; - if (new_state != port->delayed_state) - tcpm_set_state(port, SNK_ATTACH_WAIT, 0); - break; - case SNK_DEBOUNCED: - if (tcpm_port_is_disconnected(port)) - new_state = SNK_UNATTACHED; - else if (port->vbus_present) - new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED; - else - new_state = SNK_UNATTACHED; - if (new_state != port->delayed_state) - tcpm_set_state(port, SNK_DEBOUNCED, 0); - break; - case SNK_READY: - if (tcpm_port_is_disconnected(port)) - tcpm_set_state(port, unattached_state(port), 0); - else if (!port->pd_capable && - (cc1 != old_cc1 || cc2 != old_cc2)) - tcpm_set_current_limit(port, - tcpm_get_current_limit(port), - 5000); - break; - - case AUDIO_ACC_ATTACHED: - if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN) - tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0); - break; - case AUDIO_ACC_DEBOUNCE: - if (tcpm_port_is_audio(port)) - tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0); - break; - - case DEBUG_ACC_ATTACHED: - if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN) - tcpm_set_state(port, ACC_UNATTACHED, 0); - break; - - case SNK_TRY: - /* Do nothing, waiting for timeout */ - break; - - case SNK_DISCOVERY: - /* CC line is unstable, wait for debounce */ - if (tcpm_port_is_disconnected(port)) - tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0); - break; - case SNK_DISCOVERY_DEBOUNCE: - break; - - case SRC_TRYWAIT: - /* Hand over to state machine if needed */ - if (!port->vbus_present && tcpm_port_is_source(port)) - tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0); - break; - case SRC_TRYWAIT_DEBOUNCE: - if (port->vbus_present || !tcpm_port_is_source(port)) - tcpm_set_state(port, SRC_TRYWAIT, 0); - break; - case SNK_TRY_WAIT_DEBOUNCE: - if (!tcpm_port_is_sink(port)) { - port->max_wait = 0; - tcpm_set_state(port, SRC_TRYWAIT, 0); - } - break; - case SRC_TRY_WAIT: - if (tcpm_port_is_source(port)) - tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0); - break; - case SRC_TRY_DEBOUNCE: - tcpm_set_state(port, SRC_TRY_WAIT, 0); - break; - case SNK_TRYWAIT_DEBOUNCE: - if (tcpm_port_is_sink(port)) - tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0); - break; - case SNK_TRYWAIT_VBUS: - if (!tcpm_port_is_sink(port)) - tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0); - break; - case SNK_TRYWAIT: - /* Do nothing, waiting for tCCDebounce */ - break; - case PR_SWAP_SNK_SRC_SINK_OFF: - case PR_SWAP_SRC_SNK_TRANSITION_OFF: - case PR_SWAP_SRC_SNK_SOURCE_OFF: - case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: - case PR_SWAP_SNK_SRC_SOURCE_ON: - /* - * CC state change is expected in PR_SWAP - * Ignore it. - */ - break; - - default: - if (tcpm_port_is_disconnected(port)) - tcpm_set_state(port, unattached_state(port), 0); - break; - } -} - -static void _tcpm_pd_vbus_on(struct tcpm_port *port) -{ - tcpm_log_force(port, "VBUS on"); - port->vbus_present = true; - switch (port->state) { - case SNK_TRANSITION_SINK_VBUS: - port->explicit_contract = true; - tcpm_set_state(port, SNK_READY, 0); - break; - case SNK_DISCOVERY: - tcpm_set_state(port, SNK_DISCOVERY, 0); - break; - - case SNK_DEBOUNCED: - tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY - : SNK_ATTACHED, - 0); - break; - case SNK_HARD_RESET_WAIT_VBUS: - tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0); - break; - case SRC_ATTACHED: - tcpm_set_state(port, SRC_STARTUP, 0); - break; - case SRC_HARD_RESET_VBUS_ON: - tcpm_set_state(port, SRC_STARTUP, 0); - break; - - case SNK_TRY: - /* Do nothing, waiting for timeout */ - break; - case SRC_TRYWAIT: - /* Do nothing, Waiting for Rd to be detected */ - break; - case SRC_TRYWAIT_DEBOUNCE: - tcpm_set_state(port, SRC_TRYWAIT, 0); - break; - case SNK_TRY_WAIT_DEBOUNCE: - /* Do nothing, waiting for PD_DEBOUNCE to do be done */ - break; - case SNK_TRYWAIT: - /* Do nothing, waiting for tCCDebounce */ - break; - case SNK_TRYWAIT_VBUS: - if (tcpm_port_is_sink(port)) - tcpm_set_state(port, SNK_ATTACHED, 0); - break; - case SNK_TRYWAIT_DEBOUNCE: - /* Do nothing, waiting for Rp */ - break; - case SRC_TRY_WAIT: - case SRC_TRY_DEBOUNCE: - /* Do nothing, waiting for sink detection */ - break; - default: - break; - } -} - -static void _tcpm_pd_vbus_off(struct tcpm_port *port) -{ - tcpm_log_force(port, "VBUS off"); - port->vbus_present = false; - port->vbus_never_low = false; - switch (port->state) { - case SNK_HARD_RESET_SINK_OFF: - tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0); - break; - case SRC_HARD_RESET_VBUS_OFF: - tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0); - break; - case HARD_RESET_SEND: - break; - - case SNK_TRY: - /* Do nothing, waiting for timeout */ - break; - case SRC_TRYWAIT: - /* Hand over to state machine if needed */ - if (tcpm_port_is_source(port)) - tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0); - break; - case SNK_TRY_WAIT_DEBOUNCE: - /* Do nothing, waiting for PD_DEBOUNCE to do be done */ - break; - case SNK_TRYWAIT: - case SNK_TRYWAIT_VBUS: - case SNK_TRYWAIT_DEBOUNCE: - break; - case SNK_ATTACH_WAIT: - tcpm_set_state(port, SNK_UNATTACHED, 0); - break; - - case SNK_NEGOTIATE_CAPABILITIES: - break; - - case PR_SWAP_SRC_SNK_TRANSITION_OFF: - tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0); - break; - - case PR_SWAP_SNK_SRC_SINK_OFF: - /* Do nothing, expected */ - break; - - case PORT_RESET_WAIT_OFF: - tcpm_set_state(port, tcpm_default_state(port), 0); - break; - case SRC_TRY_WAIT: - case SRC_TRY_DEBOUNCE: - /* Do nothing, waiting for sink detection */ - break; - default: - if (port->pwr_role == TYPEC_SINK && - port->attached) - tcpm_set_state(port, SNK_UNATTACHED, 0); - break; - } -} - -static void _tcpm_pd_hard_reset(struct tcpm_port *port) -{ - tcpm_log_force(port, "Received hard reset"); - /* - * If we keep receiving hard reset requests, executing the hard reset - * must have failed. Revert to error recovery if that happens. - */ - tcpm_set_state(port, - port->hard_reset_count < PD_N_HARD_RESET_COUNT ? - HARD_RESET_START : ERROR_RECOVERY, - 0); -} - -static void tcpm_pd_event_handler(struct work_struct *work) -{ - struct tcpm_port *port = container_of(work, struct tcpm_port, - event_work); - u32 events; - - mutex_lock(&port->lock); - - spin_lock(&port->pd_event_lock); - while (port->pd_events) { - events = port->pd_events; - port->pd_events = 0; - spin_unlock(&port->pd_event_lock); - if (events & TCPM_RESET_EVENT) - _tcpm_pd_hard_reset(port); - if (events & TCPM_VBUS_EVENT) { - bool vbus; - - vbus = port->tcpc->get_vbus(port->tcpc); - if (vbus) - _tcpm_pd_vbus_on(port); - else - _tcpm_pd_vbus_off(port); - } - if (events & TCPM_CC_EVENT) { - enum typec_cc_status cc1, cc2; - - if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0) - _tcpm_cc_change(port, cc1, cc2); - } - spin_lock(&port->pd_event_lock); - } - spin_unlock(&port->pd_event_lock); - mutex_unlock(&port->lock); -} - -void tcpm_cc_change(struct tcpm_port *port) -{ - spin_lock(&port->pd_event_lock); - port->pd_events |= TCPM_CC_EVENT; - spin_unlock(&port->pd_event_lock); - queue_work(port->wq, &port->event_work); -} -EXPORT_SYMBOL_GPL(tcpm_cc_change); - -void tcpm_vbus_change(struct tcpm_port *port) -{ - spin_lock(&port->pd_event_lock); - port->pd_events |= TCPM_VBUS_EVENT; - spin_unlock(&port->pd_event_lock); - queue_work(port->wq, &port->event_work); -} -EXPORT_SYMBOL_GPL(tcpm_vbus_change); - -void tcpm_pd_hard_reset(struct tcpm_port *port) -{ - spin_lock(&port->pd_event_lock); - port->pd_events = TCPM_RESET_EVENT; - spin_unlock(&port->pd_event_lock); - queue_work(port->wq, &port->event_work); -} -EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset); - -static int tcpm_dr_set(const struct typec_capability *cap, - enum typec_data_role data) -{ - struct tcpm_port *port = typec_cap_to_tcpm(cap); - int ret; - - mutex_lock(&port->swap_lock); - mutex_lock(&port->lock); - - if (port->port_type != TYPEC_PORT_DRP) { - ret = -EINVAL; - goto port_unlock; - } - if (port->state != SRC_READY && port->state != SNK_READY) { - ret = -EAGAIN; - goto port_unlock; - } - - if (port->data_role == data) { - ret = 0; - goto port_unlock; - } - - /* - * XXX - * 6.3.9: If an alternate mode is active, a request to swap - * alternate modes shall trigger a port reset. - * Reject data role swap request in this case. - */ - - if (!port->pd_capable) { - /* - * If the partner is not PD capable, reset the port to - * trigger a role change. This can only work if a preferred - * role is configured, and if it matches the requested role. - */ - if (port->try_role == TYPEC_NO_PREFERRED_ROLE || - port->try_role == port->pwr_role) { - ret = -EINVAL; - goto port_unlock; - } - port->non_pd_role_swap = true; - tcpm_set_state(port, PORT_RESET, 0); - } else { - tcpm_set_state(port, DR_SWAP_SEND, 0); - } - - port->swap_status = 0; - port->swap_pending = true; - reinit_completion(&port->swap_complete); - mutex_unlock(&port->lock); - - if (!wait_for_completion_timeout(&port->swap_complete, - msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) - ret = -ETIMEDOUT; - else - ret = port->swap_status; - - port->non_pd_role_swap = false; - goto swap_unlock; - -port_unlock: - mutex_unlock(&port->lock); -swap_unlock: - mutex_unlock(&port->swap_lock); - return ret; -} - -static int tcpm_pr_set(const struct typec_capability *cap, - enum typec_role role) -{ - struct tcpm_port *port = typec_cap_to_tcpm(cap); - int ret; - - mutex_lock(&port->swap_lock); - mutex_lock(&port->lock); - - if (port->port_type != TYPEC_PORT_DRP) { - ret = -EINVAL; - goto port_unlock; - } - if (port->state != SRC_READY && port->state != SNK_READY) { - ret = -EAGAIN; - goto port_unlock; - } - - if (role == port->pwr_role) { - ret = 0; - goto port_unlock; - } - - port->swap_status = 0; - port->swap_pending = true; - reinit_completion(&port->swap_complete); - tcpm_set_state(port, PR_SWAP_SEND, 0); - mutex_unlock(&port->lock); - - if (!wait_for_completion_timeout(&port->swap_complete, - msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) - ret = -ETIMEDOUT; - else - ret = port->swap_status; - - goto swap_unlock; - -port_unlock: - mutex_unlock(&port->lock); -swap_unlock: - mutex_unlock(&port->swap_lock); - return ret; -} - -static int tcpm_vconn_set(const struct typec_capability *cap, - enum typec_role role) -{ - struct tcpm_port *port = typec_cap_to_tcpm(cap); - int ret; - - mutex_lock(&port->swap_lock); - mutex_lock(&port->lock); - - if (port->state != SRC_READY && port->state != SNK_READY) { - ret = -EAGAIN; - goto port_unlock; - } - - if (role == port->vconn_role) { - ret = 0; - goto port_unlock; - } - - port->swap_status = 0; - port->swap_pending = true; - reinit_completion(&port->swap_complete); - tcpm_set_state(port, VCONN_SWAP_SEND, 0); - mutex_unlock(&port->lock); - - if (!wait_for_completion_timeout(&port->swap_complete, - msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) - ret = -ETIMEDOUT; - else - ret = port->swap_status; - - goto swap_unlock; - -port_unlock: - mutex_unlock(&port->lock); -swap_unlock: - mutex_unlock(&port->swap_lock); - return ret; -} - -static int tcpm_try_role(const struct typec_capability *cap, int role) -{ - struct tcpm_port *port = typec_cap_to_tcpm(cap); - struct tcpc_dev *tcpc = port->tcpc; - int ret = 0; - - mutex_lock(&port->lock); - if (tcpc->try_role) - ret = tcpc->try_role(tcpc, role); - if (!ret && !tcpc->config->try_role_hw) - port->try_role = role; - port->try_src_count = 0; - port->try_snk_count = 0; - mutex_unlock(&port->lock); - - return ret; -} - -static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr) -{ - unsigned int target_mw; - int ret; - - mutex_lock(&port->swap_lock); - mutex_lock(&port->lock); - - if (!port->pps_data.active) { - ret = -EOPNOTSUPP; - goto port_unlock; - } - - if (port->state != SNK_READY) { - ret = -EAGAIN; - goto port_unlock; - } - - if (op_curr > port->pps_data.max_curr) { - ret = -EINVAL; - goto port_unlock; - } - - target_mw = (op_curr * port->pps_data.out_volt) / 1000; - if (target_mw < port->operating_snk_mw) { - ret = -EINVAL; - goto port_unlock; - } - - reinit_completion(&port->pps_complete); - port->pps_data.op_curr = op_curr; - port->pps_status = 0; - port->pps_pending = true; - tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); - mutex_unlock(&port->lock); - - if (!wait_for_completion_timeout(&port->pps_complete, - msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) - ret = -ETIMEDOUT; - else - ret = port->pps_status; - - goto swap_unlock; - -port_unlock: - mutex_unlock(&port->lock); -swap_unlock: - mutex_unlock(&port->swap_lock); - - return ret; -} - -static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt) -{ - unsigned int target_mw; - int ret; - - mutex_lock(&port->swap_lock); - mutex_lock(&port->lock); - - if (!port->pps_data.active) { - ret = -EOPNOTSUPP; - goto port_unlock; - } - - if (port->state != SNK_READY) { - ret = -EAGAIN; - goto port_unlock; - } - - if (out_volt < port->pps_data.min_volt || - out_volt > port->pps_data.max_volt) { - ret = -EINVAL; - goto port_unlock; - } - - target_mw = (port->pps_data.op_curr * out_volt) / 1000; - if (target_mw < port->operating_snk_mw) { - ret = -EINVAL; - goto port_unlock; - } - - reinit_completion(&port->pps_complete); - port->pps_data.out_volt = out_volt; - port->pps_status = 0; - port->pps_pending = true; - tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); - mutex_unlock(&port->lock); - - if (!wait_for_completion_timeout(&port->pps_complete, - msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) - ret = -ETIMEDOUT; - else - ret = port->pps_status; - - goto swap_unlock; - -port_unlock: - mutex_unlock(&port->lock); -swap_unlock: - mutex_unlock(&port->swap_lock); - - return ret; -} - -static int tcpm_pps_activate(struct tcpm_port *port, bool activate) -{ - int ret = 0; - - mutex_lock(&port->swap_lock); - mutex_lock(&port->lock); - - if (!port->pps_data.supported) { - ret = -EOPNOTSUPP; - goto port_unlock; - } - - /* Trying to deactivate PPS when already deactivated so just bail */ - if (!port->pps_data.active && !activate) - goto port_unlock; - - if (port->state != SNK_READY) { - ret = -EAGAIN; - goto port_unlock; - } - - reinit_completion(&port->pps_complete); - port->pps_status = 0; - port->pps_pending = true; - - /* Trigger PPS request or move back to standard PDO contract */ - if (activate) { - port->pps_data.out_volt = port->supply_voltage; - port->pps_data.op_curr = port->current_limit; - tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); - } else { - tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); - } - mutex_unlock(&port->lock); - - if (!wait_for_completion_timeout(&port->pps_complete, - msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) - ret = -ETIMEDOUT; - else - ret = port->pps_status; - - goto swap_unlock; - -port_unlock: - mutex_unlock(&port->lock); -swap_unlock: - mutex_unlock(&port->swap_lock); - - return ret; -} - -static void tcpm_init(struct tcpm_port *port) -{ - enum typec_cc_status cc1, cc2; - - port->tcpc->init(port->tcpc); - - tcpm_reset_port(port); - - /* - * XXX - * Should possibly wait for VBUS to settle if it was enabled locally - * since tcpm_reset_port() will disable VBUS. - */ - port->vbus_present = port->tcpc->get_vbus(port->tcpc); - if (port->vbus_present) - port->vbus_never_low = true; - - tcpm_set_state(port, tcpm_default_state(port), 0); - - if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0) - _tcpm_cc_change(port, cc1, cc2); - - /* - * Some adapters need a clean slate at startup, and won't recover - * otherwise. So do not try to be fancy and force a clean disconnect. - */ - tcpm_set_state(port, PORT_RESET, 0); -} - -static int tcpm_port_type_set(const struct typec_capability *cap, - enum typec_port_type type) -{ - struct tcpm_port *port = typec_cap_to_tcpm(cap); - - mutex_lock(&port->lock); - if (type == port->port_type) - goto port_unlock; - - port->port_type = type; - - if (!port->connected) { - tcpm_set_state(port, PORT_RESET, 0); - } else if (type == TYPEC_PORT_SNK) { - if (!(port->pwr_role == TYPEC_SINK && - port->data_role == TYPEC_DEVICE)) - tcpm_set_state(port, PORT_RESET, 0); - } else if (type == TYPEC_PORT_SRC) { - if (!(port->pwr_role == TYPEC_SOURCE && - port->data_role == TYPEC_HOST)) - tcpm_set_state(port, PORT_RESET, 0); - } - -port_unlock: - mutex_unlock(&port->lock); - return 0; -} - -void tcpm_tcpc_reset(struct tcpm_port *port) -{ - mutex_lock(&port->lock); - /* XXX: Maintain PD connection if possible? */ - tcpm_init(port); - mutex_unlock(&port->lock); -} -EXPORT_SYMBOL_GPL(tcpm_tcpc_reset); - -static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo, - unsigned int nr_pdo) -{ - unsigned int i; - - if (nr_pdo > PDO_MAX_OBJECTS) - nr_pdo = PDO_MAX_OBJECTS; - - for (i = 0; i < nr_pdo; i++) - dest_pdo[i] = src_pdo[i]; - - return nr_pdo; -} - -static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo, - unsigned int nr_vdo) -{ - unsigned int i; - - if (nr_vdo > VDO_MAX_OBJECTS) - nr_vdo = VDO_MAX_OBJECTS; - - for (i = 0; i < nr_vdo; i++) - dest_vdo[i] = src_vdo[i]; - - return nr_vdo; -} - -static int tcpm_fw_get_caps(struct tcpm_port *port, - struct fwnode_handle *fwnode) -{ - const char *cap_str; - int ret; - u32 mw; - - if (!fwnode) - return -EINVAL; - - /* USB data support is optional */ - ret = fwnode_property_read_string(fwnode, "data-role", &cap_str); - if (ret == 0) { - port->typec_caps.data = typec_find_port_data_role(cap_str); - if (port->typec_caps.data < 0) - return -EINVAL; - } - - ret = fwnode_property_read_string(fwnode, "power-role", &cap_str); - if (ret < 0) - return ret; - - port->typec_caps.type = typec_find_port_power_role(cap_str); - if (port->typec_caps.type < 0) - return -EINVAL; - port->port_type = port->typec_caps.type; - - if (port->port_type == TYPEC_PORT_SNK) - goto sink; - - /* Get source pdos */ - ret = fwnode_property_read_u32_array(fwnode, "source-pdos", - NULL, 0); - if (ret <= 0) - return -EINVAL; - - port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS); - ret = fwnode_property_read_u32_array(fwnode, "source-pdos", - port->src_pdo, port->nr_src_pdo); - if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo, - port->nr_src_pdo)) - return -EINVAL; - - if (port->port_type == TYPEC_PORT_SRC) - return 0; - - /* Get the preferred power role for DRP */ - ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str); - if (ret < 0) - return ret; - - port->typec_caps.prefer_role = typec_find_power_role(cap_str); - if (port->typec_caps.prefer_role < 0) - return -EINVAL; -sink: - /* Get sink pdos */ - ret = fwnode_property_read_u32_array(fwnode, "sink-pdos", - NULL, 0); - if (ret <= 0) - return -EINVAL; - - port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS); - ret = fwnode_property_read_u32_array(fwnode, "sink-pdos", - port->snk_pdo, port->nr_snk_pdo); - if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo, - port->nr_snk_pdo)) - return -EINVAL; - - if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0) - return -EINVAL; - port->operating_snk_mw = mw / 1000; - - return 0; -} - -int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo, - unsigned int nr_pdo) -{ - if (tcpm_validate_caps(port, pdo, nr_pdo)) - return -EINVAL; - - mutex_lock(&port->lock); - port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, pdo, nr_pdo); - switch (port->state) { - case SRC_UNATTACHED: - case SRC_ATTACH_WAIT: - case SRC_TRYWAIT: - tcpm_set_cc(port, tcpm_rp_cc(port)); - break; - case SRC_SEND_CAPABILITIES: - case SRC_NEGOTIATE_CAPABILITIES: - case SRC_READY: - case SRC_WAIT_NEW_CAPABILITIES: - tcpm_set_cc(port, tcpm_rp_cc(port)); - tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); - break; - default: - break; - } - mutex_unlock(&port->lock); - return 0; -} -EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities); - -int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo, - unsigned int nr_pdo, - unsigned int operating_snk_mw) -{ - if (tcpm_validate_caps(port, pdo, nr_pdo)) - return -EINVAL; - - mutex_lock(&port->lock); - port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo); - port->operating_snk_mw = operating_snk_mw; - port->update_sink_caps = true; - - switch (port->state) { - case SNK_NEGOTIATE_CAPABILITIES: - case SNK_NEGOTIATE_PPS_CAPABILITIES: - case SNK_READY: - case SNK_TRANSITION_SINK: - case SNK_TRANSITION_SINK_VBUS: - if (port->pps_data.active) - tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); - else - tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); - break; - default: - break; - } - mutex_unlock(&port->lock); - return 0; -} -EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities); - -/* Power Supply access to expose source power information */ -enum tcpm_psy_online_states { - TCPM_PSY_OFFLINE = 0, - TCPM_PSY_FIXED_ONLINE, - TCPM_PSY_PROG_ONLINE, -}; - -static enum power_supply_property tcpm_psy_props[] = { - POWER_SUPPLY_PROP_USB_TYPE, - POWER_SUPPLY_PROP_ONLINE, - POWER_SUPPLY_PROP_VOLTAGE_MIN, - POWER_SUPPLY_PROP_VOLTAGE_MAX, - POWER_SUPPLY_PROP_VOLTAGE_NOW, - POWER_SUPPLY_PROP_CURRENT_MAX, - POWER_SUPPLY_PROP_CURRENT_NOW, -}; - -static int tcpm_psy_get_online(struct tcpm_port *port, - union power_supply_propval *val) -{ - if (port->vbus_charge) { - if (port->pps_data.active) - val->intval = TCPM_PSY_PROG_ONLINE; - else - val->intval = TCPM_PSY_FIXED_ONLINE; - } else { - val->intval = TCPM_PSY_OFFLINE; - } - - return 0; -} - -static int tcpm_psy_get_voltage_min(struct tcpm_port *port, - union power_supply_propval *val) -{ - if (port->pps_data.active) - val->intval = port->pps_data.min_volt * 1000; - else - val->intval = port->supply_voltage * 1000; - - return 0; -} - -static int tcpm_psy_get_voltage_max(struct tcpm_port *port, - union power_supply_propval *val) -{ - if (port->pps_data.active) - val->intval = port->pps_data.max_volt * 1000; - else - val->intval = port->supply_voltage * 1000; - - return 0; -} - -static int tcpm_psy_get_voltage_now(struct tcpm_port *port, - union power_supply_propval *val) -{ - val->intval = port->supply_voltage * 1000; - - return 0; -} - -static int tcpm_psy_get_current_max(struct tcpm_port *port, - union power_supply_propval *val) -{ - if (port->pps_data.active) - val->intval = port->pps_data.max_curr * 1000; - else - val->intval = port->current_limit * 1000; - - return 0; -} - -static int tcpm_psy_get_current_now(struct tcpm_port *port, - union power_supply_propval *val) -{ - val->intval = port->current_limit * 1000; - - return 0; -} - -static int tcpm_psy_get_prop(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct tcpm_port *port = power_supply_get_drvdata(psy); - int ret = 0; - - switch (psp) { - case POWER_SUPPLY_PROP_USB_TYPE: - val->intval = port->usb_type; - break; - case POWER_SUPPLY_PROP_ONLINE: - ret = tcpm_psy_get_online(port, val); - break; - case POWER_SUPPLY_PROP_VOLTAGE_MIN: - ret = tcpm_psy_get_voltage_min(port, val); - break; - case POWER_SUPPLY_PROP_VOLTAGE_MAX: - ret = tcpm_psy_get_voltage_max(port, val); - break; - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - ret = tcpm_psy_get_voltage_now(port, val); - break; - case POWER_SUPPLY_PROP_CURRENT_MAX: - ret = tcpm_psy_get_current_max(port, val); - break; - case POWER_SUPPLY_PROP_CURRENT_NOW: - ret = tcpm_psy_get_current_now(port, val); - break; - default: - ret = -EINVAL; - break; - } - - return ret; -} - -static int tcpm_psy_set_online(struct tcpm_port *port, - const union power_supply_propval *val) -{ - int ret; - - switch (val->intval) { - case TCPM_PSY_FIXED_ONLINE: - ret = tcpm_pps_activate(port, false); - break; - case TCPM_PSY_PROG_ONLINE: - ret = tcpm_pps_activate(port, true); - break; - default: - ret = -EINVAL; - break; - } - - return ret; -} - -static int tcpm_psy_set_prop(struct power_supply *psy, - enum power_supply_property psp, - const union power_supply_propval *val) -{ - struct tcpm_port *port = power_supply_get_drvdata(psy); - int ret; - - switch (psp) { - case POWER_SUPPLY_PROP_ONLINE: - ret = tcpm_psy_set_online(port, val); - break; - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - if (val->intval < port->pps_data.min_volt * 1000 || - val->intval > port->pps_data.max_volt * 1000) - ret = -EINVAL; - else - ret = tcpm_pps_set_out_volt(port, val->intval / 1000); - break; - case POWER_SUPPLY_PROP_CURRENT_NOW: - if (val->intval > port->pps_data.max_curr * 1000) - ret = -EINVAL; - else - ret = tcpm_pps_set_op_curr(port, val->intval / 1000); - break; - default: - ret = -EINVAL; - break; - } - - return ret; -} - -static int tcpm_psy_prop_writeable(struct power_supply *psy, - enum power_supply_property psp) -{ - switch (psp) { - case POWER_SUPPLY_PROP_ONLINE: - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - case POWER_SUPPLY_PROP_CURRENT_NOW: - return 1; - default: - return 0; - } -} - -static enum power_supply_usb_type tcpm_psy_usb_types[] = { - POWER_SUPPLY_USB_TYPE_C, - POWER_SUPPLY_USB_TYPE_PD, - POWER_SUPPLY_USB_TYPE_PD_PPS, -}; - -static const char *tcpm_psy_name_prefix = "tcpm-source-psy-"; - -static int devm_tcpm_psy_register(struct tcpm_port *port) -{ - struct power_supply_config psy_cfg = {}; - const char *port_dev_name = dev_name(port->dev); - size_t psy_name_len = strlen(tcpm_psy_name_prefix) + - strlen(port_dev_name) + 1; - char *psy_name; - - psy_cfg.drv_data = port; - psy_cfg.fwnode = dev_fwnode(port->dev); - psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL); - if (!psy_name) - return -ENOMEM; - - snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix, - port_dev_name); - port->psy_desc.name = psy_name; - port->psy_desc.type = POWER_SUPPLY_TYPE_USB, - port->psy_desc.usb_types = tcpm_psy_usb_types; - port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types); - port->psy_desc.properties = tcpm_psy_props, - port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props), - port->psy_desc.get_property = tcpm_psy_get_prop, - port->psy_desc.set_property = tcpm_psy_set_prop, - port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable, - - port->usb_type = POWER_SUPPLY_USB_TYPE_C; - - port->psy = devm_power_supply_register(port->dev, &port->psy_desc, - &psy_cfg); - - return PTR_ERR_OR_ZERO(port->psy); -} - -static int tcpm_copy_caps(struct tcpm_port *port, - const struct tcpc_config *tcfg) -{ - if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) || - tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo)) - return -EINVAL; - - port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo, - tcfg->nr_src_pdo); - port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo, - tcfg->nr_snk_pdo); - - port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo, - tcfg->nr_snk_vdo); - - port->operating_snk_mw = tcfg->operating_snk_mw; - - port->typec_caps.prefer_role = tcfg->default_role; - port->typec_caps.type = tcfg->type; - port->typec_caps.data = tcfg->data; - - return 0; -} - -struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) -{ - struct tcpm_port *port; - int i, err; - - if (!dev || !tcpc || - !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc || - !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus || - !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit) - return ERR_PTR(-EINVAL); - - port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); - if (!port) - return ERR_PTR(-ENOMEM); - - port->dev = dev; - port->tcpc = tcpc; - - mutex_init(&port->lock); - mutex_init(&port->swap_lock); - - port->wq = create_singlethread_workqueue(dev_name(dev)); - if (!port->wq) - return ERR_PTR(-ENOMEM); - INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work); - INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work); - INIT_WORK(&port->event_work, tcpm_pd_event_handler); - - spin_lock_init(&port->pd_event_lock); - - init_completion(&port->tx_complete); - init_completion(&port->swap_complete); - init_completion(&port->pps_complete); - tcpm_debugfs_init(port); - - err = tcpm_fw_get_caps(port, tcpc->fwnode); - if ((err < 0) && tcpc->config) - err = tcpm_copy_caps(port, tcpc->config); - if (err < 0) - goto out_destroy_wq; - - if (!tcpc->config || !tcpc->config->try_role_hw) - port->try_role = port->typec_caps.prefer_role; - else - port->try_role = TYPEC_NO_PREFERRED_ROLE; - - port->typec_caps.fwnode = tcpc->fwnode; - port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */ - port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */ - port->typec_caps.dr_set = tcpm_dr_set; - port->typec_caps.pr_set = tcpm_pr_set; - port->typec_caps.vconn_set = tcpm_vconn_set; - port->typec_caps.try_role = tcpm_try_role; - port->typec_caps.port_type_set = tcpm_port_type_set; - - port->partner_desc.identity = &port->partner_ident; - port->port_type = port->typec_caps.type; - - port->role_sw = usb_role_switch_get(port->dev); - if (IS_ERR(port->role_sw)) { - err = PTR_ERR(port->role_sw); - goto out_destroy_wq; - } - - err = devm_tcpm_psy_register(port); - if (err) - goto out_destroy_wq; - - port->typec_port = typec_register_port(port->dev, &port->typec_caps); - if (IS_ERR(port->typec_port)) { - err = PTR_ERR(port->typec_port); - goto out_destroy_wq; - } - - if (tcpc->config && tcpc->config->alt_modes) { - const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes; - - i = 0; - while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) { - struct typec_altmode *alt; - - alt = typec_port_register_altmode(port->typec_port, - paltmode); - if (IS_ERR(alt)) { - tcpm_log(port, - "%s: failed to register port alternate mode 0x%x", - dev_name(dev), paltmode->svid); - break; - } - typec_altmode_set_drvdata(alt, port); - alt->ops = &tcpm_altmode_ops; - port->port_altmode[i] = alt; - i++; - paltmode++; - } - } - - mutex_lock(&port->lock); - tcpm_init(port); - mutex_unlock(&port->lock); - - tcpm_log(port, "%s: registered", dev_name(dev)); - return port; - -out_destroy_wq: - usb_role_switch_put(port->role_sw); - destroy_workqueue(port->wq); - return ERR_PTR(err); -} -EXPORT_SYMBOL_GPL(tcpm_register_port); - -void tcpm_unregister_port(struct tcpm_port *port) -{ - int i; - - tcpm_reset_port(port); - for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++) - typec_unregister_altmode(port->port_altmode[i]); - typec_unregister_port(port->typec_port); - usb_role_switch_put(port->role_sw); - tcpm_debugfs_exit(port); - destroy_workqueue(port->wq); -} -EXPORT_SYMBOL_GPL(tcpm_unregister_port); - -MODULE_AUTHOR("Guenter Roeck "); -MODULE_DESCRIPTION("USB Type-C Port Manager"); -MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig new file mode 100644 index 000000000000..f03ea8a61768 --- /dev/null +++ b/drivers/usb/typec/tcpm/Kconfig @@ -0,0 +1,52 @@ +config TYPEC_TCPM + tristate "USB Type-C Port Controller Manager" + depends on USB + select USB_ROLE_SWITCH + select POWER_SUPPLY + help + The Type-C Port Controller Manager provides a USB PD and USB Type-C + state machine for use with Type-C Port Controllers. + +if TYPEC_TCPM + +config TYPEC_TCPCI + tristate "Type-C Port Controller Interface driver" + depends on I2C + select REGMAP_I2C + help + Type-C Port Controller driver for TCPCI-compliant controller. + +if TYPEC_TCPCI + +config TYPEC_RT1711H + tristate "Richtek RT1711H Type-C chip driver" + help + Richtek RT1711H Type-C chip driver that works with + Type-C Port Controller Manager to provide USB PD and USB + Type-C functionalities. + +endif # TYPEC_TCPCI + +config TYPEC_FUSB302 + tristate "Fairchild FUSB302 Type-C chip driver" + depends on I2C + help + The Fairchild FUSB302 Type-C chip driver that works with + Type-C Port Controller Manager to provide USB PD and USB + Type-C functionalities. + +config TYPEC_WCOVE + tristate "Intel WhiskeyCove PMIC USB Type-C PHY driver" + depends on ACPI + depends on INTEL_SOC_PMIC + depends on INTEL_PMC_IPC + depends on BXT_WC_PMIC_OPREGION + help + This driver adds support for USB Type-C on Intel Broxton platforms + that have Intel Whiskey Cove PMIC. The driver works with USB Type-C + Port Controller Manager to provide USB PD and Type-C functionalities. + + To compile this driver as module, choose M here: the module will be + called typec_wcove.ko + +endif # TYPEC_TCPM diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile new file mode 100644 index 000000000000..a5ff6c8eb892 --- /dev/null +++ b/drivers/usb/typec/tcpm/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_TYPEC_TCPM) += tcpm.o +obj-$(CONFIG_TYPEC_FUSB302) += fusb302.o +obj-$(CONFIG_TYPEC_WCOVE) += typec_wcove.o +typec_wcove-y := wcove.o +obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o +obj-$(CONFIG_TYPEC_RT1711H) += tcpci_rt1711h.o diff --git a/drivers/usb/typec/tcpm/fusb302.c b/drivers/usb/typec/tcpm/fusb302.c new file mode 100644 index 000000000000..6e9370a813f7 --- /dev/null +++ b/drivers/usb/typec/tcpm/fusb302.c @@ -0,0 +1,1861 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2016-2017 Google, Inc + * + * Fairchild FUSB302 Type-C Chip Driver + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "fusb302_reg.h" + +/* + * When the device is SNK, BC_LVL interrupt is used to monitor cc pins + * for the current capability offered by the SRC. As FUSB302 chip fires + * the BC_LVL interrupt on PD signalings, cc lvl should be handled after + * a delay to avoid measuring on PD activities. The delay is slightly + * longer than PD_T_PD_DEBPUNCE (10-20ms). + */ +#define T_BC_LVL_DEBOUNCE_DELAY_MS 30 + +enum toggling_mode { + TOGGLINE_MODE_OFF, + TOGGLING_MODE_DRP, + TOGGLING_MODE_SNK, + TOGGLING_MODE_SRC, +}; + +enum src_current_status { + SRC_CURRENT_DEFAULT, + SRC_CURRENT_MEDIUM, + SRC_CURRENT_HIGH, +}; + +static const u8 ra_mda_value[] = { + [SRC_CURRENT_DEFAULT] = 4, /* 210mV */ + [SRC_CURRENT_MEDIUM] = 9, /* 420mV */ + [SRC_CURRENT_HIGH] = 18, /* 798mV */ +}; + +static const u8 rd_mda_value[] = { + [SRC_CURRENT_DEFAULT] = 38, /* 1638mV */ + [SRC_CURRENT_MEDIUM] = 38, /* 1638mV */ + [SRC_CURRENT_HIGH] = 61, /* 2604mV */ +}; + +#define LOG_BUFFER_ENTRIES 1024 +#define LOG_BUFFER_ENTRY_SIZE 128 + +struct fusb302_chip { + struct device *dev; + struct i2c_client *i2c_client; + struct tcpm_port *tcpm_port; + struct tcpc_dev tcpc_dev; + struct tcpc_config tcpc_config; + + struct regulator *vbus; + + int gpio_int_n; + int gpio_int_n_irq; + struct extcon_dev *extcon; + + struct workqueue_struct *wq; + struct delayed_work bc_lvl_handler; + + atomic_t pm_suspend; + atomic_t i2c_busy; + + /* lock for sharing chip states */ + struct mutex lock; + + /* chip status */ + enum toggling_mode toggling_mode; + enum src_current_status src_current_status; + bool intr_togdone; + bool intr_bc_lvl; + bool intr_comp_chng; + + /* port status */ + bool pull_up; + bool vconn_on; + bool vbus_on; + bool charge_on; + bool vbus_present; + enum typec_cc_polarity cc_polarity; + enum typec_cc_status cc1; + enum typec_cc_status cc2; + u32 snk_pdo[PDO_MAX_OBJECTS]; + +#ifdef CONFIG_DEBUG_FS + struct dentry *dentry; + /* lock for log buffer access */ + struct mutex logbuffer_lock; + int logbuffer_head; + int logbuffer_tail; + u8 *logbuffer[LOG_BUFFER_ENTRIES]; +#endif +}; + +/* + * Logging + */ + +#ifdef CONFIG_DEBUG_FS + +static bool fusb302_log_full(struct fusb302_chip *chip) +{ + return chip->logbuffer_tail == + (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; +} + +static void _fusb302_log(struct fusb302_chip *chip, const char *fmt, + va_list args) +{ + char tmpbuffer[LOG_BUFFER_ENTRY_SIZE]; + u64 ts_nsec = local_clock(); + unsigned long rem_nsec; + + if (!chip->logbuffer[chip->logbuffer_head]) { + chip->logbuffer[chip->logbuffer_head] = + kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL); + if (!chip->logbuffer[chip->logbuffer_head]) + return; + } + + vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args); + + mutex_lock(&chip->logbuffer_lock); + + if (fusb302_log_full(chip)) { + chip->logbuffer_head = max(chip->logbuffer_head - 1, 0); + strlcpy(tmpbuffer, "overflow", sizeof(tmpbuffer)); + } + + if (chip->logbuffer_head < 0 || + chip->logbuffer_head >= LOG_BUFFER_ENTRIES) { + dev_warn(chip->dev, + "Bad log buffer index %d\n", chip->logbuffer_head); + goto abort; + } + + if (!chip->logbuffer[chip->logbuffer_head]) { + dev_warn(chip->dev, + "Log buffer index %d is NULL\n", chip->logbuffer_head); + goto abort; + } + + rem_nsec = do_div(ts_nsec, 1000000000); + scnprintf(chip->logbuffer[chip->logbuffer_head], + LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s", + (unsigned long)ts_nsec, rem_nsec / 1000, + tmpbuffer); + chip->logbuffer_head = (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; + +abort: + mutex_unlock(&chip->logbuffer_lock); +} + +static void fusb302_log(struct fusb302_chip *chip, const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + _fusb302_log(chip, fmt, args); + va_end(args); +} + +static int fusb302_debug_show(struct seq_file *s, void *v) +{ + struct fusb302_chip *chip = (struct fusb302_chip *)s->private; + int tail; + + mutex_lock(&chip->logbuffer_lock); + tail = chip->logbuffer_tail; + while (tail != chip->logbuffer_head) { + seq_printf(s, "%s\n", chip->logbuffer[tail]); + tail = (tail + 1) % LOG_BUFFER_ENTRIES; + } + if (!seq_has_overflowed(s)) + chip->logbuffer_tail = tail; + mutex_unlock(&chip->logbuffer_lock); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(fusb302_debug); + +static struct dentry *rootdir; + +static void fusb302_debugfs_init(struct fusb302_chip *chip) +{ + mutex_init(&chip->logbuffer_lock); + if (!rootdir) + rootdir = debugfs_create_dir("fusb302", NULL); + + chip->dentry = debugfs_create_file(dev_name(chip->dev), + S_IFREG | 0444, rootdir, + chip, &fusb302_debug_fops); +} + +static void fusb302_debugfs_exit(struct fusb302_chip *chip) +{ + debugfs_remove(chip->dentry); + debugfs_remove(rootdir); +} + +#else + +static void fusb302_log(const struct fusb302_chip *chip, + const char *fmt, ...) { } +static void fusb302_debugfs_init(const struct fusb302_chip *chip) { } +static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { } + +#endif + +#define FUSB302_RESUME_RETRY 10 +#define FUSB302_RESUME_RETRY_SLEEP 50 + +static bool fusb302_is_suspended(struct fusb302_chip *chip) +{ + int retry_cnt; + + for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) { + if (atomic_read(&chip->pm_suspend)) { + dev_err(chip->dev, "i2c: pm suspend, retry %d/%d\n", + retry_cnt + 1, FUSB302_RESUME_RETRY); + msleep(FUSB302_RESUME_RETRY_SLEEP); + } else { + return false; + } + } + + return true; +} + +static int fusb302_i2c_write(struct fusb302_chip *chip, + u8 address, u8 data) +{ + int ret = 0; + + atomic_set(&chip->i2c_busy, 1); + + if (fusb302_is_suspended(chip)) { + atomic_set(&chip->i2c_busy, 0); + return -ETIMEDOUT; + } + + ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data); + if (ret < 0) + fusb302_log(chip, "cannot write 0x%02x to 0x%02x, ret=%d", + data, address, ret); + atomic_set(&chip->i2c_busy, 0); + + return ret; +} + +static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address, + u8 length, const u8 *data) +{ + int ret = 0; + + if (length <= 0) + return ret; + atomic_set(&chip->i2c_busy, 1); + + if (fusb302_is_suspended(chip)) { + atomic_set(&chip->i2c_busy, 0); + return -ETIMEDOUT; + } + + ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address, + length, data); + if (ret < 0) + fusb302_log(chip, "cannot block write 0x%02x, len=%d, ret=%d", + address, length, ret); + atomic_set(&chip->i2c_busy, 0); + + return ret; +} + +static int fusb302_i2c_read(struct fusb302_chip *chip, + u8 address, u8 *data) +{ + int ret = 0; + + atomic_set(&chip->i2c_busy, 1); + + if (fusb302_is_suspended(chip)) { + atomic_set(&chip->i2c_busy, 0); + return -ETIMEDOUT; + } + + ret = i2c_smbus_read_byte_data(chip->i2c_client, address); + *data = (u8)ret; + if (ret < 0) + fusb302_log(chip, "cannot read %02x, ret=%d", address, ret); + atomic_set(&chip->i2c_busy, 0); + + return ret; +} + +static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address, + u8 length, u8 *data) +{ + int ret = 0; + + if (length <= 0) + return ret; + atomic_set(&chip->i2c_busy, 1); + + if (fusb302_is_suspended(chip)) { + atomic_set(&chip->i2c_busy, 0); + return -ETIMEDOUT; + } + + ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address, + length, data); + if (ret < 0) { + fusb302_log(chip, "cannot block read 0x%02x, len=%d, ret=%d", + address, length, ret); + goto done; + } + if (ret != length) { + fusb302_log(chip, "only read %d/%d bytes from 0x%02x", + ret, length, address); + ret = -EIO; + } + +done: + atomic_set(&chip->i2c_busy, 0); + + return ret; +} + +static int fusb302_i2c_mask_write(struct fusb302_chip *chip, u8 address, + u8 mask, u8 value) +{ + int ret = 0; + u8 data; + + ret = fusb302_i2c_read(chip, address, &data); + if (ret < 0) + return ret; + data &= ~mask; + data |= value; + ret = fusb302_i2c_write(chip, address, data); + if (ret < 0) + return ret; + + return ret; +} + +static int fusb302_i2c_set_bits(struct fusb302_chip *chip, u8 address, + u8 set_bits) +{ + return fusb302_i2c_mask_write(chip, address, 0x00, set_bits); +} + +static int fusb302_i2c_clear_bits(struct fusb302_chip *chip, u8 address, + u8 clear_bits) +{ + return fusb302_i2c_mask_write(chip, address, clear_bits, 0x00); +} + +static int fusb302_sw_reset(struct fusb302_chip *chip) +{ + int ret = 0; + + ret = fusb302_i2c_write(chip, FUSB_REG_RESET, + FUSB_REG_RESET_SW_RESET); + if (ret < 0) + fusb302_log(chip, "cannot sw reset the chip, ret=%d", ret); + else + fusb302_log(chip, "sw reset"); + + return ret; +} + +static int fusb302_enable_tx_auto_retries(struct fusb302_chip *chip) +{ + int ret = 0; + + ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3, + FUSB_REG_CONTROL3_N_RETRIES_3 | + FUSB_REG_CONTROL3_AUTO_RETRY); + + return ret; +} + +/* + * initialize interrupt on the chip + * - unmasked interrupt: VBUS_OK + */ +static int fusb302_init_interrupt(struct fusb302_chip *chip) +{ + int ret = 0; + + ret = fusb302_i2c_write(chip, FUSB_REG_MASK, + 0xFF & ~FUSB_REG_MASK_VBUSOK); + if (ret < 0) + return ret; + ret = fusb302_i2c_write(chip, FUSB_REG_MASKA, 0xFF); + if (ret < 0) + return ret; + ret = fusb302_i2c_write(chip, FUSB_REG_MASKB, 0xFF); + if (ret < 0) + return ret; + ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL0, + FUSB_REG_CONTROL0_INT_MASK); + if (ret < 0) + return ret; + + return ret; +} + +static int fusb302_set_power_mode(struct fusb302_chip *chip, u8 power_mode) +{ + int ret = 0; + + ret = fusb302_i2c_write(chip, FUSB_REG_POWER, power_mode); + + return ret; +} + +static int tcpm_init(struct tcpc_dev *dev) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + u8 data; + + ret = fusb302_sw_reset(chip); + if (ret < 0) + return ret; + ret = fusb302_enable_tx_auto_retries(chip); + if (ret < 0) + return ret; + ret = fusb302_init_interrupt(chip); + if (ret < 0) + return ret; + ret = fusb302_set_power_mode(chip, FUSB_REG_POWER_PWR_ALL); + if (ret < 0) + return ret; + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &data); + if (ret < 0) + return ret; + chip->vbus_present = !!(data & FUSB_REG_STATUS0_VBUSOK); + ret = fusb302_i2c_read(chip, FUSB_REG_DEVICE_ID, &data); + if (ret < 0) + return ret; + fusb302_log(chip, "fusb302 device ID: 0x%02x", data); + + return ret; +} + +static int tcpm_get_vbus(struct tcpc_dev *dev) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + + mutex_lock(&chip->lock); + ret = chip->vbus_present ? 1 : 0; + mutex_unlock(&chip->lock); + + return ret; +} + +static int tcpm_get_current_limit(struct tcpc_dev *dev) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int current_limit = 0; + unsigned long timeout; + + if (!chip->extcon) + return 0; + + /* + * USB2 Charger detection may still be in progress when we get here, + * this can take upto 600ms, wait 800ms max. + */ + timeout = jiffies + msecs_to_jiffies(800); + do { + if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_SDP) == 1) + current_limit = 500; + + if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_CDP) == 1 || + extcon_get_state(chip->extcon, EXTCON_CHG_USB_ACA) == 1) + current_limit = 1500; + + if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_DCP) == 1) + current_limit = 2000; + + msleep(50); + } while (current_limit == 0 && time_before(jiffies, timeout)); + + return current_limit; +} + +static int fusb302_set_cc_pull(struct fusb302_chip *chip, + bool pull_up, bool pull_down) +{ + int ret = 0; + u8 data = 0x00; + u8 mask = FUSB_REG_SWITCHES0_CC1_PU_EN | + FUSB_REG_SWITCHES0_CC2_PU_EN | + FUSB_REG_SWITCHES0_CC1_PD_EN | + FUSB_REG_SWITCHES0_CC2_PD_EN; + + if (pull_up) + data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ? + FUSB_REG_SWITCHES0_CC1_PU_EN : + FUSB_REG_SWITCHES0_CC2_PU_EN; + if (pull_down) + data |= FUSB_REG_SWITCHES0_CC1_PD_EN | + FUSB_REG_SWITCHES0_CC2_PD_EN; + ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, + mask, data); + if (ret < 0) + return ret; + chip->pull_up = pull_up; + + return ret; +} + +static int fusb302_set_src_current(struct fusb302_chip *chip, + enum src_current_status status) +{ + int ret = 0; + + chip->src_current_status = status; + switch (status) { + case SRC_CURRENT_DEFAULT: + ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, + FUSB_REG_CONTROL0_HOST_CUR_MASK, + FUSB_REG_CONTROL0_HOST_CUR_DEF); + break; + case SRC_CURRENT_MEDIUM: + ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, + FUSB_REG_CONTROL0_HOST_CUR_MASK, + FUSB_REG_CONTROL0_HOST_CUR_MED); + break; + case SRC_CURRENT_HIGH: + ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, + FUSB_REG_CONTROL0_HOST_CUR_MASK, + FUSB_REG_CONTROL0_HOST_CUR_HIGH); + break; + default: + break; + } + + return ret; +} + +static int fusb302_set_toggling(struct fusb302_chip *chip, + enum toggling_mode mode) +{ + int ret = 0; + + /* first disable toggling */ + ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL2, + FUSB_REG_CONTROL2_TOGGLE); + if (ret < 0) + return ret; + /* mask interrupts for SRC or SNK */ + ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASK, + FUSB_REG_MASK_BC_LVL | + FUSB_REG_MASK_COMP_CHNG); + if (ret < 0) + return ret; + chip->intr_bc_lvl = false; + chip->intr_comp_chng = false; + /* configure toggling mode: none/snk/src/drp */ + switch (mode) { + case TOGGLINE_MODE_OFF: + ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, + FUSB_REG_CONTROL2_MODE_MASK, + FUSB_REG_CONTROL2_MODE_NONE); + if (ret < 0) + return ret; + break; + case TOGGLING_MODE_SNK: + ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, + FUSB_REG_CONTROL2_MODE_MASK, + FUSB_REG_CONTROL2_MODE_UFP); + if (ret < 0) + return ret; + break; + case TOGGLING_MODE_SRC: + ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, + FUSB_REG_CONTROL2_MODE_MASK, + FUSB_REG_CONTROL2_MODE_DFP); + if (ret < 0) + return ret; + break; + case TOGGLING_MODE_DRP: + ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, + FUSB_REG_CONTROL2_MODE_MASK, + FUSB_REG_CONTROL2_MODE_DRP); + if (ret < 0) + return ret; + break; + default: + break; + } + + if (mode == TOGGLINE_MODE_OFF) { + /* mask TOGDONE interrupt */ + ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, + FUSB_REG_MASKA_TOGDONE); + if (ret < 0) + return ret; + chip->intr_togdone = false; + } else { + /* unmask TOGDONE interrupt */ + ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, + FUSB_REG_MASKA_TOGDONE); + if (ret < 0) + return ret; + chip->intr_togdone = true; + /* start toggling */ + ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL2, + FUSB_REG_CONTROL2_TOGGLE); + if (ret < 0) + return ret; + /* during toggling, consider cc as Open */ + chip->cc1 = TYPEC_CC_OPEN; + chip->cc2 = TYPEC_CC_OPEN; + } + chip->toggling_mode = mode; + + return ret; +} + +static const char * const typec_cc_status_name[] = { + [TYPEC_CC_OPEN] = "Open", + [TYPEC_CC_RA] = "Ra", + [TYPEC_CC_RD] = "Rd", + [TYPEC_CC_RP_DEF] = "Rp-def", + [TYPEC_CC_RP_1_5] = "Rp-1.5", + [TYPEC_CC_RP_3_0] = "Rp-3.0", +}; + +static const enum src_current_status cc_src_current[] = { + [TYPEC_CC_OPEN] = SRC_CURRENT_DEFAULT, + [TYPEC_CC_RA] = SRC_CURRENT_DEFAULT, + [TYPEC_CC_RD] = SRC_CURRENT_DEFAULT, + [TYPEC_CC_RP_DEF] = SRC_CURRENT_DEFAULT, + [TYPEC_CC_RP_1_5] = SRC_CURRENT_MEDIUM, + [TYPEC_CC_RP_3_0] = SRC_CURRENT_HIGH, +}; + +static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + bool pull_up, pull_down; + u8 rd_mda; + + mutex_lock(&chip->lock); + switch (cc) { + case TYPEC_CC_OPEN: + pull_up = false; + pull_down = false; + break; + case TYPEC_CC_RD: + pull_up = false; + pull_down = true; + break; + case TYPEC_CC_RP_DEF: + case TYPEC_CC_RP_1_5: + case TYPEC_CC_RP_3_0: + pull_up = true; + pull_down = false; + break; + default: + fusb302_log(chip, "unsupported cc value %s", + typec_cc_status_name[cc]); + ret = -EINVAL; + goto done; + } + ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF); + if (ret < 0) { + fusb302_log(chip, "cannot stop toggling, ret=%d", ret); + goto done; + } + ret = fusb302_set_cc_pull(chip, pull_up, pull_down); + if (ret < 0) { + fusb302_log(chip, + "cannot set cc pulling up %s, down %s, ret = %d", + pull_up ? "True" : "False", + pull_down ? "True" : "False", + ret); + goto done; + } + /* reset the cc status */ + chip->cc1 = TYPEC_CC_OPEN; + chip->cc2 = TYPEC_CC_OPEN; + /* adjust current for SRC */ + if (pull_up) { + ret = fusb302_set_src_current(chip, cc_src_current[cc]); + if (ret < 0) { + fusb302_log(chip, "cannot set src current %s, ret=%d", + typec_cc_status_name[cc], ret); + goto done; + } + } + /* enable/disable interrupts, BC_LVL for SNK and COMP_CHNG for SRC */ + if (pull_up) { + rd_mda = rd_mda_value[cc_src_current[cc]]; + ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); + if (ret < 0) { + fusb302_log(chip, + "cannot set SRC measure value, ret=%d", + ret); + goto done; + } + ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK, + FUSB_REG_MASK_BC_LVL | + FUSB_REG_MASK_COMP_CHNG, + FUSB_REG_MASK_COMP_CHNG); + if (ret < 0) { + fusb302_log(chip, "cannot set SRC interrupt, ret=%d", + ret); + goto done; + } + chip->intr_bc_lvl = false; + chip->intr_comp_chng = true; + } + if (pull_down) { + ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK, + FUSB_REG_MASK_BC_LVL | + FUSB_REG_MASK_COMP_CHNG, + FUSB_REG_MASK_BC_LVL); + if (ret < 0) { + fusb302_log(chip, "cannot set SRC interrupt, ret=%d", + ret); + goto done; + } + chip->intr_bc_lvl = true; + chip->intr_comp_chng = false; + } + fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]); +done: + mutex_unlock(&chip->lock); + + return ret; +} + +static int tcpm_get_cc(struct tcpc_dev *dev, enum typec_cc_status *cc1, + enum typec_cc_status *cc2) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + + mutex_lock(&chip->lock); + *cc1 = chip->cc1; + *cc2 = chip->cc2; + fusb302_log(chip, "cc1=%s, cc2=%s", typec_cc_status_name[*cc1], + typec_cc_status_name[*cc2]); + mutex_unlock(&chip->lock); + + return 0; +} + +static int tcpm_set_polarity(struct tcpc_dev *dev, + enum typec_cc_polarity polarity) +{ + return 0; +} + +static int tcpm_set_vconn(struct tcpc_dev *dev, bool on) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + u8 switches0_data = 0x00; + u8 switches0_mask = FUSB_REG_SWITCHES0_VCONN_CC1 | + FUSB_REG_SWITCHES0_VCONN_CC2; + + mutex_lock(&chip->lock); + if (chip->vconn_on == on) { + fusb302_log(chip, "vconn is already %s", on ? "On" : "Off"); + goto done; + } + if (on) { + switches0_data = (chip->cc_polarity == TYPEC_POLARITY_CC1) ? + FUSB_REG_SWITCHES0_VCONN_CC2 : + FUSB_REG_SWITCHES0_VCONN_CC1; + } + ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, + switches0_mask, switches0_data); + if (ret < 0) + goto done; + chip->vconn_on = on; + fusb302_log(chip, "vconn := %s", on ? "On" : "Off"); +done: + mutex_unlock(&chip->lock); + + return ret; +} + +static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + + mutex_lock(&chip->lock); + if (chip->vbus_on == on) { + fusb302_log(chip, "vbus is already %s", on ? "On" : "Off"); + } else { + if (on) + ret = regulator_enable(chip->vbus); + else + ret = regulator_disable(chip->vbus); + if (ret < 0) { + fusb302_log(chip, "cannot %s vbus regulator, ret=%d", + on ? "enable" : "disable", ret); + goto done; + } + chip->vbus_on = on; + fusb302_log(chip, "vbus := %s", on ? "On" : "Off"); + } + if (chip->charge_on == charge) + fusb302_log(chip, "charge is already %s", + charge ? "On" : "Off"); + else + chip->charge_on = charge; + +done: + mutex_unlock(&chip->lock); + + return ret; +} + +static int fusb302_pd_tx_flush(struct fusb302_chip *chip) +{ + return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL0, + FUSB_REG_CONTROL0_TX_FLUSH); +} + +static int fusb302_pd_rx_flush(struct fusb302_chip *chip) +{ + return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL1, + FUSB_REG_CONTROL1_RX_FLUSH); +} + +static int fusb302_pd_set_auto_goodcrc(struct fusb302_chip *chip, bool on) +{ + if (on) + return fusb302_i2c_set_bits(chip, FUSB_REG_SWITCHES1, + FUSB_REG_SWITCHES1_AUTO_GCRC); + return fusb302_i2c_clear_bits(chip, FUSB_REG_SWITCHES1, + FUSB_REG_SWITCHES1_AUTO_GCRC); +} + +static int fusb302_pd_set_interrupts(struct fusb302_chip *chip, bool on) +{ + int ret = 0; + u8 mask_interrupts = FUSB_REG_MASK_COLLISION; + u8 maska_interrupts = FUSB_REG_MASKA_RETRYFAIL | + FUSB_REG_MASKA_HARDSENT | + FUSB_REG_MASKA_TX_SUCCESS | + FUSB_REG_MASKA_HARDRESET; + u8 maskb_interrupts = FUSB_REG_MASKB_GCRCSENT; + + ret = on ? + fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, mask_interrupts) : + fusb302_i2c_set_bits(chip, FUSB_REG_MASK, mask_interrupts); + if (ret < 0) + return ret; + ret = on ? + fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, maska_interrupts) : + fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, maska_interrupts); + if (ret < 0) + return ret; + ret = on ? + fusb302_i2c_clear_bits(chip, FUSB_REG_MASKB, maskb_interrupts) : + fusb302_i2c_set_bits(chip, FUSB_REG_MASKB, maskb_interrupts); + return ret; +} + +static int tcpm_set_pd_rx(struct tcpc_dev *dev, bool on) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + + mutex_lock(&chip->lock); + ret = fusb302_pd_rx_flush(chip); + if (ret < 0) { + fusb302_log(chip, "cannot flush pd rx buffer, ret=%d", ret); + goto done; + } + ret = fusb302_pd_tx_flush(chip); + if (ret < 0) { + fusb302_log(chip, "cannot flush pd tx buffer, ret=%d", ret); + goto done; + } + ret = fusb302_pd_set_auto_goodcrc(chip, on); + if (ret < 0) { + fusb302_log(chip, "cannot turn %s auto GCRC, ret=%d", + on ? "on" : "off", ret); + goto done; + } + ret = fusb302_pd_set_interrupts(chip, on); + if (ret < 0) { + fusb302_log(chip, "cannot turn %s pd interrupts, ret=%d", + on ? "on" : "off", ret); + goto done; + } + fusb302_log(chip, "pd := %s", on ? "on" : "off"); +done: + mutex_unlock(&chip->lock); + + return ret; +} + +static const char * const typec_role_name[] = { + [TYPEC_SINK] = "Sink", + [TYPEC_SOURCE] = "Source", +}; + +static const char * const typec_data_role_name[] = { + [TYPEC_DEVICE] = "Device", + [TYPEC_HOST] = "Host", +}; + +static int tcpm_set_roles(struct tcpc_dev *dev, bool attached, + enum typec_role pwr, enum typec_data_role data) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + u8 switches1_mask = FUSB_REG_SWITCHES1_POWERROLE | + FUSB_REG_SWITCHES1_DATAROLE; + u8 switches1_data = 0x00; + + mutex_lock(&chip->lock); + if (pwr == TYPEC_SOURCE) + switches1_data |= FUSB_REG_SWITCHES1_POWERROLE; + if (data == TYPEC_HOST) + switches1_data |= FUSB_REG_SWITCHES1_DATAROLE; + ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1, + switches1_mask, switches1_data); + if (ret < 0) { + fusb302_log(chip, "unable to set pd header %s, %s, ret=%d", + typec_role_name[pwr], typec_data_role_name[data], + ret); + goto done; + } + fusb302_log(chip, "pd header := %s, %s", typec_role_name[pwr], + typec_data_role_name[data]); +done: + mutex_unlock(&chip->lock); + + return ret; +} + +static int tcpm_start_drp_toggling(struct tcpc_dev *dev, + enum typec_cc_status cc) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + + mutex_lock(&chip->lock); + ret = fusb302_set_src_current(chip, cc_src_current[cc]); + if (ret < 0) { + fusb302_log(chip, "unable to set src current %s, ret=%d", + typec_cc_status_name[cc], ret); + goto done; + } + ret = fusb302_set_toggling(chip, TOGGLING_MODE_DRP); + if (ret < 0) { + fusb302_log(chip, + "unable to start drp toggling, ret=%d", ret); + goto done; + } + fusb302_log(chip, "start drp toggling"); +done: + mutex_unlock(&chip->lock); + + return ret; +} + +static int fusb302_pd_send_message(struct fusb302_chip *chip, + const struct pd_message *msg) +{ + int ret = 0; + u8 buf[40]; + u8 pos = 0; + int len; + + /* SOP tokens */ + buf[pos++] = FUSB302_TKN_SYNC1; + buf[pos++] = FUSB302_TKN_SYNC1; + buf[pos++] = FUSB302_TKN_SYNC1; + buf[pos++] = FUSB302_TKN_SYNC2; + + len = pd_header_cnt_le(msg->header) * 4; + /* plug 2 for header */ + len += 2; + if (len > 0x1F) { + fusb302_log(chip, + "PD message too long %d (incl. header)", len); + return -EINVAL; + } + /* packsym tells the FUSB302 chip that the next X bytes are payload */ + buf[pos++] = FUSB302_TKN_PACKSYM | (len & 0x1F); + memcpy(&buf[pos], &msg->header, sizeof(msg->header)); + pos += sizeof(msg->header); + + len -= 2; + memcpy(&buf[pos], msg->payload, len); + pos += len; + + /* CRC */ + buf[pos++] = FUSB302_TKN_JAMCRC; + /* EOP */ + buf[pos++] = FUSB302_TKN_EOP; + /* turn tx off after sending message */ + buf[pos++] = FUSB302_TKN_TXOFF; + /* start transmission */ + buf[pos++] = FUSB302_TKN_TXON; + + ret = fusb302_i2c_block_write(chip, FUSB_REG_FIFOS, pos, buf); + if (ret < 0) + return ret; + fusb302_log(chip, "sending PD message header: %x", msg->header); + fusb302_log(chip, "sending PD message len: %d", len); + + return ret; +} + +static int fusb302_pd_send_hardreset(struct fusb302_chip *chip) +{ + return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3, + FUSB_REG_CONTROL3_SEND_HARDRESET); +} + +static const char * const transmit_type_name[] = { + [TCPC_TX_SOP] = "SOP", + [TCPC_TX_SOP_PRIME] = "SOP'", + [TCPC_TX_SOP_PRIME_PRIME] = "SOP''", + [TCPC_TX_SOP_DEBUG_PRIME] = "DEBUG'", + [TCPC_TX_SOP_DEBUG_PRIME_PRIME] = "DEBUG''", + [TCPC_TX_HARD_RESET] = "HARD_RESET", + [TCPC_TX_CABLE_RESET] = "CABLE_RESET", + [TCPC_TX_BIST_MODE_2] = "BIST_MODE_2", +}; + +static int tcpm_pd_transmit(struct tcpc_dev *dev, enum tcpm_transmit_type type, + const struct pd_message *msg) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int ret = 0; + + mutex_lock(&chip->lock); + switch (type) { + case TCPC_TX_SOP: + ret = fusb302_pd_send_message(chip, msg); + if (ret < 0) + fusb302_log(chip, + "cannot send PD message, ret=%d", ret); + break; + case TCPC_TX_HARD_RESET: + ret = fusb302_pd_send_hardreset(chip); + if (ret < 0) + fusb302_log(chip, + "cannot send hardreset, ret=%d", ret); + break; + default: + fusb302_log(chip, "type %s not supported", + transmit_type_name[type]); + ret = -EINVAL; + } + mutex_unlock(&chip->lock); + + return ret; +} + +static enum typec_cc_status fusb302_bc_lvl_to_cc(u8 bc_lvl) +{ + if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_1230_MAX) + return TYPEC_CC_RP_3_0; + if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_600_1230) + return TYPEC_CC_RP_1_5; + if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_200_600) + return TYPEC_CC_RP_DEF; + return TYPEC_CC_OPEN; +} + +static void fusb302_bc_lvl_handler_work(struct work_struct *work) +{ + struct fusb302_chip *chip = container_of(work, struct fusb302_chip, + bc_lvl_handler.work); + int ret = 0; + u8 status0; + u8 bc_lvl; + enum typec_cc_status cc_status; + + mutex_lock(&chip->lock); + if (!chip->intr_bc_lvl) { + fusb302_log(chip, "BC_LVL interrupt is turned off, abort"); + goto done; + } + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); + if (ret < 0) + goto done; + fusb302_log(chip, "BC_LVL handler, status0=0x%02x", status0); + if (status0 & FUSB_REG_STATUS0_ACTIVITY) { + fusb302_log(chip, "CC activities detected, delay handling"); + mod_delayed_work(chip->wq, &chip->bc_lvl_handler, + msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS)); + goto done; + } + bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK; + cc_status = fusb302_bc_lvl_to_cc(bc_lvl); + if (chip->cc_polarity == TYPEC_POLARITY_CC1) { + if (chip->cc1 != cc_status) { + fusb302_log(chip, "cc1: %s -> %s", + typec_cc_status_name[chip->cc1], + typec_cc_status_name[cc_status]); + chip->cc1 = cc_status; + tcpm_cc_change(chip->tcpm_port); + } + } else { + if (chip->cc2 != cc_status) { + fusb302_log(chip, "cc2: %s -> %s", + typec_cc_status_name[chip->cc2], + typec_cc_status_name[cc_status]); + chip->cc2 = cc_status; + tcpm_cc_change(chip->tcpm_port); + } + } + +done: + mutex_unlock(&chip->lock); +} + +#define PDO_FIXED_FLAGS \ + (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM) + +static const u32 src_pdo[] = { + PDO_FIXED(5000, 400, PDO_FIXED_FLAGS), +}; + +static const struct tcpc_config fusb302_tcpc_config = { + .src_pdo = src_pdo, + .nr_src_pdo = ARRAY_SIZE(src_pdo), + .operating_snk_mw = 2500, + .type = TYPEC_PORT_DRP, + .data = TYPEC_PORT_DRD, + .default_role = TYPEC_SINK, + .alt_modes = NULL, +}; + +static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev) +{ + fusb302_tcpc_dev->init = tcpm_init; + fusb302_tcpc_dev->get_vbus = tcpm_get_vbus; + fusb302_tcpc_dev->get_current_limit = tcpm_get_current_limit; + fusb302_tcpc_dev->set_cc = tcpm_set_cc; + fusb302_tcpc_dev->get_cc = tcpm_get_cc; + fusb302_tcpc_dev->set_polarity = tcpm_set_polarity; + fusb302_tcpc_dev->set_vconn = tcpm_set_vconn; + fusb302_tcpc_dev->set_vbus = tcpm_set_vbus; + fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx; + fusb302_tcpc_dev->set_roles = tcpm_set_roles; + fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling; + fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit; +} + +static const char * const cc_polarity_name[] = { + [TYPEC_POLARITY_CC1] = "Polarity_CC1", + [TYPEC_POLARITY_CC2] = "Polarity_CC2", +}; + +static int fusb302_set_cc_polarity(struct fusb302_chip *chip, + enum typec_cc_polarity cc_polarity) +{ + int ret = 0; + u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN | + FUSB_REG_SWITCHES0_CC2_PU_EN | + FUSB_REG_SWITCHES0_VCONN_CC1 | + FUSB_REG_SWITCHES0_VCONN_CC2 | + FUSB_REG_SWITCHES0_MEAS_CC1 | + FUSB_REG_SWITCHES0_MEAS_CC2; + u8 switches0_data = 0x00; + u8 switches1_mask = FUSB_REG_SWITCHES1_TXCC1_EN | + FUSB_REG_SWITCHES1_TXCC2_EN; + u8 switches1_data = 0x00; + + if (cc_polarity == TYPEC_POLARITY_CC1) { + switches0_data = FUSB_REG_SWITCHES0_MEAS_CC1; + if (chip->vconn_on) + switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC2; + if (chip->pull_up) + switches0_data |= FUSB_REG_SWITCHES0_CC1_PU_EN; + switches1_data = FUSB_REG_SWITCHES1_TXCC1_EN; + } else { + switches0_data = FUSB_REG_SWITCHES0_MEAS_CC2; + if (chip->vconn_on) + switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC1; + if (chip->pull_up) + switches0_data |= FUSB_REG_SWITCHES0_CC2_PU_EN; + switches1_data = FUSB_REG_SWITCHES1_TXCC2_EN; + } + ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, + switches0_mask, switches0_data); + if (ret < 0) + return ret; + ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1, + switches1_mask, switches1_data); + if (ret < 0) + return ret; + chip->cc_polarity = cc_polarity; + + return ret; +} + +static int fusb302_handle_togdone_snk(struct fusb302_chip *chip, + u8 togdone_result) +{ + int ret = 0; + u8 status0; + u8 bc_lvl; + enum typec_cc_polarity cc_polarity; + enum typec_cc_status cc_status_active, cc1, cc2; + + /* set pull_up, pull_down */ + ret = fusb302_set_cc_pull(chip, false, true); + if (ret < 0) { + fusb302_log(chip, "cannot set cc to pull down, ret=%d", ret); + return ret; + } + /* set polarity */ + cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SNK1) ? + TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2; + ret = fusb302_set_cc_polarity(chip, cc_polarity); + if (ret < 0) { + fusb302_log(chip, "cannot set cc polarity %s, ret=%d", + cc_polarity_name[cc_polarity], ret); + return ret; + } + /* fusb302_set_cc_polarity() has set the correct measure block */ + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); + if (ret < 0) + return ret; + bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK; + cc_status_active = fusb302_bc_lvl_to_cc(bc_lvl); + /* restart toggling if the cc status on the active line is OPEN */ + if (cc_status_active == TYPEC_CC_OPEN) { + fusb302_log(chip, "restart toggling as CC_OPEN detected"); + ret = fusb302_set_toggling(chip, chip->toggling_mode); + return ret; + } + /* update tcpm with the new cc value */ + cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ? + cc_status_active : TYPEC_CC_OPEN; + cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ? + cc_status_active : TYPEC_CC_OPEN; + if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) { + chip->cc1 = cc1; + chip->cc2 = cc2; + tcpm_cc_change(chip->tcpm_port); + } + /* turn off toggling */ + ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF); + if (ret < 0) { + fusb302_log(chip, + "cannot set toggling mode off, ret=%d", ret); + return ret; + } + /* unmask bc_lvl interrupt */ + ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, FUSB_REG_MASK_BC_LVL); + if (ret < 0) { + fusb302_log(chip, + "cannot unmask bc_lcl interrupt, ret=%d", ret); + return ret; + } + chip->intr_bc_lvl = true; + fusb302_log(chip, "detected cc1=%s, cc2=%s", + typec_cc_status_name[cc1], + typec_cc_status_name[cc2]); + + return ret; +} + +static int fusb302_handle_togdone_src(struct fusb302_chip *chip, + u8 togdone_result) +{ + /* + * - set polarity (measure cc, vconn, tx) + * - set pull_up, pull_down + * - set cc1, cc2, and update to tcpm_port + * - set I_COMP interrupt on + */ + int ret = 0; + u8 status0; + u8 ra_mda = ra_mda_value[chip->src_current_status]; + u8 rd_mda = rd_mda_value[chip->src_current_status]; + bool ra_comp, rd_comp; + enum typec_cc_polarity cc_polarity; + enum typec_cc_status cc_status_active, cc1, cc2; + + /* set pull_up, pull_down */ + ret = fusb302_set_cc_pull(chip, true, false); + if (ret < 0) { + fusb302_log(chip, "cannot set cc to pull up, ret=%d", ret); + return ret; + } + /* set polarity */ + cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) ? + TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2; + ret = fusb302_set_cc_polarity(chip, cc_polarity); + if (ret < 0) { + fusb302_log(chip, "cannot set cc polarity %s, ret=%d", + cc_polarity_name[cc_polarity], ret); + return ret; + } + /* fusb302_set_cc_polarity() has set the correct measure block */ + ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); + if (ret < 0) + return ret; + usleep_range(50, 100); + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); + if (ret < 0) + return ret; + rd_comp = !!(status0 & FUSB_REG_STATUS0_COMP); + if (!rd_comp) { + ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda); + if (ret < 0) + return ret; + usleep_range(50, 100); + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); + if (ret < 0) + return ret; + ra_comp = !!(status0 & FUSB_REG_STATUS0_COMP); + } + if (rd_comp) + cc_status_active = TYPEC_CC_OPEN; + else if (ra_comp) + cc_status_active = TYPEC_CC_RD; + else + /* Ra is not supported, report as Open */ + cc_status_active = TYPEC_CC_OPEN; + /* restart toggling if the cc status on the active line is OPEN */ + if (cc_status_active == TYPEC_CC_OPEN) { + fusb302_log(chip, "restart toggling as CC_OPEN detected"); + ret = fusb302_set_toggling(chip, chip->toggling_mode); + return ret; + } + /* update tcpm with the new cc value */ + cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ? + cc_status_active : TYPEC_CC_OPEN; + cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ? + cc_status_active : TYPEC_CC_OPEN; + if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) { + chip->cc1 = cc1; + chip->cc2 = cc2; + tcpm_cc_change(chip->tcpm_port); + } + /* turn off toggling */ + ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF); + if (ret < 0) { + fusb302_log(chip, + "cannot set toggling mode off, ret=%d", ret); + return ret; + } + /* set MDAC to Rd threshold, and unmask I_COMP for unplug detection */ + ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); + if (ret < 0) + return ret; + /* unmask comp_chng interrupt */ + ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, + FUSB_REG_MASK_COMP_CHNG); + if (ret < 0) { + fusb302_log(chip, + "cannot unmask bc_lcl interrupt, ret=%d", ret); + return ret; + } + chip->intr_comp_chng = true; + fusb302_log(chip, "detected cc1=%s, cc2=%s", + typec_cc_status_name[cc1], + typec_cc_status_name[cc2]); + + return ret; +} + +static int fusb302_handle_togdone(struct fusb302_chip *chip) +{ + int ret = 0; + u8 status1a; + u8 togdone_result; + + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS1A, &status1a); + if (ret < 0) + return ret; + togdone_result = (status1a >> FUSB_REG_STATUS1A_TOGSS_POS) & + FUSB_REG_STATUS1A_TOGSS_MASK; + switch (togdone_result) { + case FUSB_REG_STATUS1A_TOGSS_SNK1: + case FUSB_REG_STATUS1A_TOGSS_SNK2: + return fusb302_handle_togdone_snk(chip, togdone_result); + case FUSB_REG_STATUS1A_TOGSS_SRC1: + case FUSB_REG_STATUS1A_TOGSS_SRC2: + return fusb302_handle_togdone_src(chip, togdone_result); + case FUSB_REG_STATUS1A_TOGSS_AA: + /* doesn't support */ + fusb302_log(chip, "AudioAccessory not supported"); + fusb302_set_toggling(chip, chip->toggling_mode); + break; + default: + fusb302_log(chip, "TOGDONE with an invalid state: %d", + togdone_result); + fusb302_set_toggling(chip, chip->toggling_mode); + break; + } + return ret; +} + +static int fusb302_pd_reset(struct fusb302_chip *chip) +{ + return fusb302_i2c_set_bits(chip, FUSB_REG_RESET, + FUSB_REG_RESET_PD_RESET); +} + +static int fusb302_pd_read_message(struct fusb302_chip *chip, + struct pd_message *msg) +{ + int ret = 0; + u8 token; + u8 crc[4]; + int len; + + /* first SOP token */ + ret = fusb302_i2c_read(chip, FUSB_REG_FIFOS, &token); + if (ret < 0) + return ret; + ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 2, + (u8 *)&msg->header); + if (ret < 0) + return ret; + len = pd_header_cnt_le(msg->header) * 4; + /* add 4 to length to include the CRC */ + if (len > PD_MAX_PAYLOAD * 4) { + fusb302_log(chip, "PD message too long %d", len); + return -EINVAL; + } + if (len > 0) { + ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, len, + (u8 *)msg->payload); + if (ret < 0) + return ret; + } + /* another 4 bytes to read CRC out */ + ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 4, crc); + if (ret < 0) + return ret; + fusb302_log(chip, "PD message header: %x", msg->header); + fusb302_log(chip, "PD message len: %d", len); + + /* + * Check if we've read off a GoodCRC message. If so then indicate to + * TCPM that the previous transmission has completed. Otherwise we pass + * the received message over to TCPM for processing. + * + * We make this check here instead of basing the reporting decision on + * the IRQ event type, as it's possible for the chip to report the + * TX_SUCCESS and GCRCSENT events out of order on occasion, so we need + * to check the message type to ensure correct reporting to TCPM. + */ + if ((!len) && (pd_header_type_le(msg->header) == PD_CTRL_GOOD_CRC)) + tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS); + else + tcpm_pd_receive(chip->tcpm_port, msg); + + return ret; +} + +static irqreturn_t fusb302_irq_intn(int irq, void *dev_id) +{ + struct fusb302_chip *chip = dev_id; + int ret = 0; + u8 interrupt; + u8 interrupta; + u8 interruptb; + u8 status0; + bool vbus_present; + bool comp_result; + bool intr_togdone; + bool intr_bc_lvl; + bool intr_comp_chng; + struct pd_message pd_msg; + + mutex_lock(&chip->lock); + /* grab a snapshot of intr flags */ + intr_togdone = chip->intr_togdone; + intr_bc_lvl = chip->intr_bc_lvl; + intr_comp_chng = chip->intr_comp_chng; + + ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPT, &interrupt); + if (ret < 0) + goto done; + ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTA, &interrupta); + if (ret < 0) + goto done; + ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTB, &interruptb); + if (ret < 0) + goto done; + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); + if (ret < 0) + goto done; + fusb302_log(chip, + "IRQ: 0x%02x, a: 0x%02x, b: 0x%02x, status0: 0x%02x", + interrupt, interrupta, interruptb, status0); + + if (interrupt & FUSB_REG_INTERRUPT_VBUSOK) { + vbus_present = !!(status0 & FUSB_REG_STATUS0_VBUSOK); + fusb302_log(chip, "IRQ: VBUS_OK, vbus=%s", + vbus_present ? "On" : "Off"); + if (vbus_present != chip->vbus_present) { + chip->vbus_present = vbus_present; + tcpm_vbus_change(chip->tcpm_port); + } + } + + if ((interrupta & FUSB_REG_INTERRUPTA_TOGDONE) && intr_togdone) { + fusb302_log(chip, "IRQ: TOGDONE"); + ret = fusb302_handle_togdone(chip); + if (ret < 0) { + fusb302_log(chip, + "handle togdone error, ret=%d", ret); + goto done; + } + } + + if ((interrupt & FUSB_REG_INTERRUPT_BC_LVL) && intr_bc_lvl) { + fusb302_log(chip, "IRQ: BC_LVL, handler pending"); + /* + * as BC_LVL interrupt can be affected by PD activity, + * apply delay to for the handler to wait for the PD + * signaling to finish. + */ + mod_delayed_work(chip->wq, &chip->bc_lvl_handler, + msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS)); + } + + if ((interrupt & FUSB_REG_INTERRUPT_COMP_CHNG) && intr_comp_chng) { + comp_result = !!(status0 & FUSB_REG_STATUS0_COMP); + fusb302_log(chip, "IRQ: COMP_CHNG, comp=%s", + comp_result ? "true" : "false"); + if (comp_result) { + /* cc level > Rd_threashold, detach */ + if (chip->cc_polarity == TYPEC_POLARITY_CC1) + chip->cc1 = TYPEC_CC_OPEN; + else + chip->cc2 = TYPEC_CC_OPEN; + tcpm_cc_change(chip->tcpm_port); + } + } + + if (interrupt & FUSB_REG_INTERRUPT_COLLISION) { + fusb302_log(chip, "IRQ: PD collision"); + tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED); + } + + if (interrupta & FUSB_REG_INTERRUPTA_RETRYFAIL) { + fusb302_log(chip, "IRQ: PD retry failed"); + tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED); + } + + if (interrupta & FUSB_REG_INTERRUPTA_HARDSENT) { + fusb302_log(chip, "IRQ: PD hardreset sent"); + ret = fusb302_pd_reset(chip); + if (ret < 0) { + fusb302_log(chip, "cannot PD reset, ret=%d", ret); + goto done; + } + tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS); + } + + if (interrupta & FUSB_REG_INTERRUPTA_TX_SUCCESS) { + fusb302_log(chip, "IRQ: PD tx success"); + ret = fusb302_pd_read_message(chip, &pd_msg); + if (ret < 0) { + fusb302_log(chip, + "cannot read in PD message, ret=%d", ret); + goto done; + } + } + + if (interrupta & FUSB_REG_INTERRUPTA_HARDRESET) { + fusb302_log(chip, "IRQ: PD received hardreset"); + ret = fusb302_pd_reset(chip); + if (ret < 0) { + fusb302_log(chip, "cannot PD reset, ret=%d", ret); + goto done; + } + tcpm_pd_hard_reset(chip->tcpm_port); + } + + if (interruptb & FUSB_REG_INTERRUPTB_GCRCSENT) { + fusb302_log(chip, "IRQ: PD sent good CRC"); + ret = fusb302_pd_read_message(chip, &pd_msg); + if (ret < 0) { + fusb302_log(chip, + "cannot read in PD message, ret=%d", ret); + goto done; + } + } +done: + mutex_unlock(&chip->lock); + + return IRQ_HANDLED; +} + +static int init_gpio(struct fusb302_chip *chip) +{ + struct device_node *node; + int ret = 0; + + node = chip->dev->of_node; + chip->gpio_int_n = of_get_named_gpio(node, "fcs,int_n", 0); + if (!gpio_is_valid(chip->gpio_int_n)) { + ret = chip->gpio_int_n; + dev_err(chip->dev, "cannot get named GPIO Int_N, ret=%d", ret); + return ret; + } + ret = devm_gpio_request(chip->dev, chip->gpio_int_n, "fcs,int_n"); + if (ret < 0) { + dev_err(chip->dev, "cannot request GPIO Int_N, ret=%d", ret); + return ret; + } + ret = gpio_direction_input(chip->gpio_int_n); + if (ret < 0) { + dev_err(chip->dev, + "cannot set GPIO Int_N to input, ret=%d", ret); + return ret; + } + ret = gpio_to_irq(chip->gpio_int_n); + if (ret < 0) { + dev_err(chip->dev, + "cannot request IRQ for GPIO Int_N, ret=%d", ret); + return ret; + } + chip->gpio_int_n_irq = ret; + return 0; +} + +static int fusb302_composite_snk_pdo_array(struct fusb302_chip *chip) +{ + struct device *dev = chip->dev; + u32 max_uv, max_ua; + + chip->snk_pdo[0] = PDO_FIXED(5000, 400, PDO_FIXED_FLAGS); + + /* + * As max_snk_ma/mv/mw is not needed for tcpc_config, + * those settings should be passed in via sink PDO, so + * "fcs, max-sink-*" properties will be deprecated, to + * perserve compatibility with existing users of them, + * we read those properties to convert them to be a var + * PDO. + */ + if (device_property_read_u32(dev, "fcs,max-sink-microvolt", &max_uv) || + device_property_read_u32(dev, "fcs,max-sink-microamp", &max_ua)) + return 1; + + chip->snk_pdo[1] = PDO_VAR(5000, max_uv / 1000, max_ua / 1000); + return 2; +} + +static int fusb302_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct fusb302_chip *chip; + struct i2c_adapter *adapter; + struct device *dev = &client->dev; + const char *name; + int ret = 0; + u32 v; + + adapter = to_i2c_adapter(client->dev.parent); + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { + dev_err(&client->dev, + "I2C/SMBus block functionality not supported!\n"); + return -ENODEV; + } + chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->i2c_client = client; + chip->dev = &client->dev; + chip->tcpc_config = fusb302_tcpc_config; + chip->tcpc_dev.config = &chip->tcpc_config; + mutex_init(&chip->lock); + + chip->tcpc_dev.fwnode = + device_get_named_child_node(dev, "connector"); + + if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v)) + chip->tcpc_config.operating_snk_mw = v / 1000; + + /* Composite sink PDO */ + chip->tcpc_config.nr_snk_pdo = fusb302_composite_snk_pdo_array(chip); + chip->tcpc_config.snk_pdo = chip->snk_pdo; + + /* + * Devicetree platforms should get extcon via phandle (not yet + * supported). On ACPI platforms, we get the name from a device prop. + * This device prop is for kernel internal use only and is expected + * to be set by the platform code which also registers the i2c client + * for the fusb302. + */ + if (device_property_read_string(dev, "fcs,extcon-name", &name) == 0) { + chip->extcon = extcon_get_extcon_dev(name); + if (!chip->extcon) + return -EPROBE_DEFER; + } + + chip->vbus = devm_regulator_get(chip->dev, "vbus"); + if (IS_ERR(chip->vbus)) + return PTR_ERR(chip->vbus); + + chip->wq = create_singlethread_workqueue(dev_name(chip->dev)); + if (!chip->wq) + return -ENOMEM; + + INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work); + init_tcpc_dev(&chip->tcpc_dev); + + if (client->irq) { + chip->gpio_int_n_irq = client->irq; + } else { + ret = init_gpio(chip); + if (ret < 0) + goto destroy_workqueue; + } + + chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev); + if (IS_ERR(chip->tcpm_port)) { + ret = PTR_ERR(chip->tcpm_port); + if (ret != -EPROBE_DEFER) + dev_err(dev, "cannot register tcpm port, ret=%d", ret); + goto destroy_workqueue; + } + + ret = devm_request_threaded_irq(chip->dev, chip->gpio_int_n_irq, + NULL, fusb302_irq_intn, + IRQF_ONESHOT | IRQF_TRIGGER_LOW, + "fsc_interrupt_int_n", chip); + if (ret < 0) { + dev_err(dev, "cannot request IRQ for GPIO Int_N, ret=%d", ret); + goto tcpm_unregister_port; + } + enable_irq_wake(chip->gpio_int_n_irq); + fusb302_debugfs_init(chip); + i2c_set_clientdata(client, chip); + + return ret; + +tcpm_unregister_port: + tcpm_unregister_port(chip->tcpm_port); +destroy_workqueue: + destroy_workqueue(chip->wq); + + return ret; +} + +static int fusb302_remove(struct i2c_client *client) +{ + struct fusb302_chip *chip = i2c_get_clientdata(client); + + tcpm_unregister_port(chip->tcpm_port); + destroy_workqueue(chip->wq); + fusb302_debugfs_exit(chip); + + return 0; +} + +static int fusb302_pm_suspend(struct device *dev) +{ + struct fusb302_chip *chip = dev->driver_data; + + if (atomic_read(&chip->i2c_busy)) + return -EBUSY; + atomic_set(&chip->pm_suspend, 1); + + return 0; +} + +static int fusb302_pm_resume(struct device *dev) +{ + struct fusb302_chip *chip = dev->driver_data; + + atomic_set(&chip->pm_suspend, 0); + + return 0; +} + +static const struct of_device_id fusb302_dt_match[] = { + {.compatible = "fcs,fusb302"}, + {}, +}; +MODULE_DEVICE_TABLE(of, fusb302_dt_match); + +static const struct i2c_device_id fusb302_i2c_device_id[] = { + {"typec_fusb302", 0}, + {}, +}; +MODULE_DEVICE_TABLE(i2c, fusb302_i2c_device_id); + +static const struct dev_pm_ops fusb302_pm_ops = { + .suspend = fusb302_pm_suspend, + .resume = fusb302_pm_resume, +}; + +static struct i2c_driver fusb302_driver = { + .driver = { + .name = "typec_fusb302", + .pm = &fusb302_pm_ops, + .of_match_table = of_match_ptr(fusb302_dt_match), + }, + .probe = fusb302_probe, + .remove = fusb302_remove, + .id_table = fusb302_i2c_device_id, +}; +module_i2c_driver(fusb302_driver); + +MODULE_AUTHOR("Yueyao Zhu "); +MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/tcpm/fusb302_reg.h b/drivers/usb/typec/tcpm/fusb302_reg.h new file mode 100644 index 000000000000..00b39d365478 --- /dev/null +++ b/drivers/usb/typec/tcpm/fusb302_reg.h @@ -0,0 +1,177 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2016-2017 Google, Inc + * + * Fairchild FUSB302 Type-C Chip Driver + */ + +#ifndef FUSB302_REG_H +#define FUSB302_REG_H + +#define FUSB_REG_DEVICE_ID 0x01 +#define FUSB_REG_SWITCHES0 0x02 +#define FUSB_REG_SWITCHES0_CC2_PU_EN BIT(7) +#define FUSB_REG_SWITCHES0_CC1_PU_EN BIT(6) +#define FUSB_REG_SWITCHES0_VCONN_CC2 BIT(5) +#define FUSB_REG_SWITCHES0_VCONN_CC1 BIT(4) +#define FUSB_REG_SWITCHES0_MEAS_CC2 BIT(3) +#define FUSB_REG_SWITCHES0_MEAS_CC1 BIT(2) +#define FUSB_REG_SWITCHES0_CC2_PD_EN BIT(1) +#define FUSB_REG_SWITCHES0_CC1_PD_EN BIT(0) +#define FUSB_REG_SWITCHES1 0x03 +#define FUSB_REG_SWITCHES1_POWERROLE BIT(7) +#define FUSB_REG_SWITCHES1_SPECREV1 BIT(6) +#define FUSB_REG_SWITCHES1_SPECREV0 BIT(5) +#define FUSB_REG_SWITCHES1_DATAROLE BIT(4) +#define FUSB_REG_SWITCHES1_AUTO_GCRC BIT(2) +#define FUSB_REG_SWITCHES1_TXCC2_EN BIT(1) +#define FUSB_REG_SWITCHES1_TXCC1_EN BIT(0) +#define FUSB_REG_MEASURE 0x04 +#define FUSB_REG_MEASURE_MDAC5 BIT(7) +#define FUSB_REG_MEASURE_MDAC4 BIT(6) +#define FUSB_REG_MEASURE_MDAC3 BIT(5) +#define FUSB_REG_MEASURE_MDAC2 BIT(4) +#define FUSB_REG_MEASURE_MDAC1 BIT(3) +#define FUSB_REG_MEASURE_MDAC0 BIT(2) +#define FUSB_REG_MEASURE_VBUS BIT(1) +#define FUSB_REG_MEASURE_XXXX5 BIT(0) +#define FUSB_REG_CONTROL0 0x06 +#define FUSB_REG_CONTROL0_TX_FLUSH BIT(6) +#define FUSB_REG_CONTROL0_INT_MASK BIT(5) +#define FUSB_REG_CONTROL0_HOST_CUR_MASK (0xC) +#define FUSB_REG_CONTROL0_HOST_CUR_HIGH (0xC) +#define FUSB_REG_CONTROL0_HOST_CUR_MED (0x8) +#define FUSB_REG_CONTROL0_HOST_CUR_DEF (0x4) +#define FUSB_REG_CONTROL0_TX_START BIT(0) +#define FUSB_REG_CONTROL1 0x07 +#define FUSB_REG_CONTROL1_ENSOP2DB BIT(6) +#define FUSB_REG_CONTROL1_ENSOP1DB BIT(5) +#define FUSB_REG_CONTROL1_BIST_MODE2 BIT(4) +#define FUSB_REG_CONTROL1_RX_FLUSH BIT(2) +#define FUSB_REG_CONTROL1_ENSOP2 BIT(1) +#define FUSB_REG_CONTROL1_ENSOP1 BIT(0) +#define FUSB_REG_CONTROL2 0x08 +#define FUSB_REG_CONTROL2_MODE BIT(1) +#define FUSB_REG_CONTROL2_MODE_MASK (0x6) +#define FUSB_REG_CONTROL2_MODE_DFP (0x6) +#define FUSB_REG_CONTROL2_MODE_UFP (0x4) +#define FUSB_REG_CONTROL2_MODE_DRP (0x2) +#define FUSB_REG_CONTROL2_MODE_NONE (0x0) +#define FUSB_REG_CONTROL2_TOGGLE BIT(0) +#define FUSB_REG_CONTROL3 0x09 +#define FUSB_REG_CONTROL3_SEND_HARDRESET BIT(6) +#define FUSB_REG_CONTROL3_BIST_TMODE BIT(5) /* 302B Only */ +#define FUSB_REG_CONTROL3_AUTO_HARDRESET BIT(4) +#define FUSB_REG_CONTROL3_AUTO_SOFTRESET BIT(3) +#define FUSB_REG_CONTROL3_N_RETRIES BIT(1) +#define FUSB_REG_CONTROL3_N_RETRIES_MASK (0x6) +#define FUSB_REG_CONTROL3_N_RETRIES_3 (0x6) +#define FUSB_REG_CONTROL3_N_RETRIES_2 (0x4) +#define FUSB_REG_CONTROL3_N_RETRIES_1 (0x2) +#define FUSB_REG_CONTROL3_AUTO_RETRY BIT(0) +#define FUSB_REG_MASK 0x0A +#define FUSB_REG_MASK_VBUSOK BIT(7) +#define FUSB_REG_MASK_ACTIVITY BIT(6) +#define FUSB_REG_MASK_COMP_CHNG BIT(5) +#define FUSB_REG_MASK_CRC_CHK BIT(4) +#define FUSB_REG_MASK_ALERT BIT(3) +#define FUSB_REG_MASK_WAKE BIT(2) +#define FUSB_REG_MASK_COLLISION BIT(1) +#define FUSB_REG_MASK_BC_LVL BIT(0) +#define FUSB_REG_POWER 0x0B +#define FUSB_REG_POWER_PWR BIT(0) +#define FUSB_REG_POWER_PWR_LOW 0x1 +#define FUSB_REG_POWER_PWR_MEDIUM 0x3 +#define FUSB_REG_POWER_PWR_HIGH 0x7 +#define FUSB_REG_POWER_PWR_ALL 0xF +#define FUSB_REG_RESET 0x0C +#define FUSB_REG_RESET_PD_RESET BIT(1) +#define FUSB_REG_RESET_SW_RESET BIT(0) +#define FUSB_REG_MASKA 0x0E +#define FUSB_REG_MASKA_OCP_TEMP BIT(7) +#define FUSB_REG_MASKA_TOGDONE BIT(6) +#define FUSB_REG_MASKA_SOFTFAIL BIT(5) +#define FUSB_REG_MASKA_RETRYFAIL BIT(4) +#define FUSB_REG_MASKA_HARDSENT BIT(3) +#define FUSB_REG_MASKA_TX_SUCCESS BIT(2) +#define FUSB_REG_MASKA_SOFTRESET BIT(1) +#define FUSB_REG_MASKA_HARDRESET BIT(0) +#define FUSB_REG_MASKB 0x0F +#define FUSB_REG_MASKB_GCRCSENT BIT(0) +#define FUSB_REG_STATUS0A 0x3C +#define FUSB_REG_STATUS0A_SOFTFAIL BIT(5) +#define FUSB_REG_STATUS0A_RETRYFAIL BIT(4) +#define FUSB_REG_STATUS0A_POWER BIT(2) +#define FUSB_REG_STATUS0A_RX_SOFT_RESET BIT(1) +#define FUSB_REG_STATUS0A_RX_HARD_RESET BIT(0) +#define FUSB_REG_STATUS1A 0x3D +#define FUSB_REG_STATUS1A_TOGSS BIT(3) +#define FUSB_REG_STATUS1A_TOGSS_RUNNING 0x0 +#define FUSB_REG_STATUS1A_TOGSS_SRC1 0x1 +#define FUSB_REG_STATUS1A_TOGSS_SRC2 0x2 +#define FUSB_REG_STATUS1A_TOGSS_SNK1 0x5 +#define FUSB_REG_STATUS1A_TOGSS_SNK2 0x6 +#define FUSB_REG_STATUS1A_TOGSS_AA 0x7 +#define FUSB_REG_STATUS1A_TOGSS_POS (3) +#define FUSB_REG_STATUS1A_TOGSS_MASK (0x7) +#define FUSB_REG_STATUS1A_RXSOP2DB BIT(2) +#define FUSB_REG_STATUS1A_RXSOP1DB BIT(1) +#define FUSB_REG_STATUS1A_RXSOP BIT(0) +#define FUSB_REG_INTERRUPTA 0x3E +#define FUSB_REG_INTERRUPTA_OCP_TEMP BIT(7) +#define FUSB_REG_INTERRUPTA_TOGDONE BIT(6) +#define FUSB_REG_INTERRUPTA_SOFTFAIL BIT(5) +#define FUSB_REG_INTERRUPTA_RETRYFAIL BIT(4) +#define FUSB_REG_INTERRUPTA_HARDSENT BIT(3) +#define FUSB_REG_INTERRUPTA_TX_SUCCESS BIT(2) +#define FUSB_REG_INTERRUPTA_SOFTRESET BIT(1) +#define FUSB_REG_INTERRUPTA_HARDRESET BIT(0) +#define FUSB_REG_INTERRUPTB 0x3F +#define FUSB_REG_INTERRUPTB_GCRCSENT BIT(0) +#define FUSB_REG_STATUS0 0x40 +#define FUSB_REG_STATUS0_VBUSOK BIT(7) +#define FUSB_REG_STATUS0_ACTIVITY BIT(6) +#define FUSB_REG_STATUS0_COMP BIT(5) +#define FUSB_REG_STATUS0_CRC_CHK BIT(4) +#define FUSB_REG_STATUS0_ALERT BIT(3) +#define FUSB_REG_STATUS0_WAKE BIT(2) +#define FUSB_REG_STATUS0_BC_LVL_MASK 0x03 +#define FUSB_REG_STATUS0_BC_LVL_0_200 0x0 +#define FUSB_REG_STATUS0_BC_LVL_200_600 0x1 +#define FUSB_REG_STATUS0_BC_LVL_600_1230 0x2 +#define FUSB_REG_STATUS0_BC_LVL_1230_MAX 0x3 +#define FUSB_REG_STATUS0_BC_LVL1 BIT(1) +#define FUSB_REG_STATUS0_BC_LVL0 BIT(0) +#define FUSB_REG_STATUS1 0x41 +#define FUSB_REG_STATUS1_RXSOP2 BIT(7) +#define FUSB_REG_STATUS1_RXSOP1 BIT(6) +#define FUSB_REG_STATUS1_RX_EMPTY BIT(5) +#define FUSB_REG_STATUS1_RX_FULL BIT(4) +#define FUSB_REG_STATUS1_TX_EMPTY BIT(3) +#define FUSB_REG_STATUS1_TX_FULL BIT(2) +#define FUSB_REG_INTERRUPT 0x42 +#define FUSB_REG_INTERRUPT_VBUSOK BIT(7) +#define FUSB_REG_INTERRUPT_ACTIVITY BIT(6) +#define FUSB_REG_INTERRUPT_COMP_CHNG BIT(5) +#define FUSB_REG_INTERRUPT_CRC_CHK BIT(4) +#define FUSB_REG_INTERRUPT_ALERT BIT(3) +#define FUSB_REG_INTERRUPT_WAKE BIT(2) +#define FUSB_REG_INTERRUPT_COLLISION BIT(1) +#define FUSB_REG_INTERRUPT_BC_LVL BIT(0) +#define FUSB_REG_FIFOS 0x43 + +/* Tokens defined for the FUSB302 TX FIFO */ +enum fusb302_txfifo_tokens { + FUSB302_TKN_TXON = 0xA1, + FUSB302_TKN_SYNC1 = 0x12, + FUSB302_TKN_SYNC2 = 0x13, + FUSB302_TKN_SYNC3 = 0x1B, + FUSB302_TKN_RST1 = 0x15, + FUSB302_TKN_RST2 = 0x16, + FUSB302_TKN_PACKSYM = 0x80, + FUSB302_TKN_JAMCRC = 0xFF, + FUSB302_TKN_EOP = 0x14, + FUSB302_TKN_TXOFF = 0xFE, +}; + +#endif diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c new file mode 100644 index 000000000000..ac6b418b15f1 --- /dev/null +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -0,0 +1,612 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2015-2017 Google, Inc + * + * USB Type-C Port Controller Interface. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "tcpci.h" + +#define PD_RETRY_COUNT 3 + +struct tcpci { + struct device *dev; + + struct tcpm_port *port; + + struct regmap *regmap; + + bool controls_vbus; + + struct tcpc_dev tcpc; + struct tcpci_data *data; +}; + +struct tcpci_chip { + struct tcpci *tcpci; + struct tcpci_data data; +}; + +static inline struct tcpci *tcpc_to_tcpci(struct tcpc_dev *tcpc) +{ + return container_of(tcpc, struct tcpci, tcpc); +} + +static int tcpci_read16(struct tcpci *tcpci, unsigned int reg, u16 *val) +{ + return regmap_raw_read(tcpci->regmap, reg, val, sizeof(u16)); +} + +static int tcpci_write16(struct tcpci *tcpci, unsigned int reg, u16 val) +{ + return regmap_raw_write(tcpci->regmap, reg, &val, sizeof(u16)); +} + +static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg; + int ret; + + switch (cc) { + case TYPEC_CC_RA: + reg = (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC2_SHIFT); + break; + case TYPEC_CC_RD: + reg = (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT); + break; + case TYPEC_CC_RP_DEF: + reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) | + (TCPC_ROLE_CTRL_RP_VAL_DEF << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + case TYPEC_CC_RP_1_5: + reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) | + (TCPC_ROLE_CTRL_RP_VAL_1_5 << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + case TYPEC_CC_RP_3_0: + reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) | + (TCPC_ROLE_CTRL_RP_VAL_3_0 << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + case TYPEC_CC_OPEN: + default: + reg = (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT); + break; + } + + ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg); + if (ret < 0) + return ret; + + return 0; +} + +static int tcpci_start_drp_toggling(struct tcpc_dev *tcpc, + enum typec_cc_status cc) +{ + int ret; + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg = TCPC_ROLE_CTRL_DRP; + + /* Handle vendor drp toggling */ + if (tcpci->data->start_drp_toggling) { + ret = tcpci->data->start_drp_toggling(tcpci, tcpci->data, cc); + if (ret < 0) + return ret; + } + + switch (cc) { + default: + case TYPEC_CC_RP_DEF: + reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + case TYPEC_CC_RP_1_5: + reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + case TYPEC_CC_RP_3_0: + reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + } + + if (cc == TYPEC_CC_RD) + reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT); + else + reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT); + ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg); + if (ret < 0) + return ret; + return regmap_write(tcpci->regmap, TCPC_COMMAND, + TCPC_CMD_LOOK4CONNECTION); +} + +static enum typec_cc_status tcpci_to_typec_cc(unsigned int cc, bool sink) +{ + switch (cc) { + case 0x1: + return sink ? TYPEC_CC_RP_DEF : TYPEC_CC_RA; + case 0x2: + return sink ? TYPEC_CC_RP_1_5 : TYPEC_CC_RD; + case 0x3: + if (sink) + return TYPEC_CC_RP_3_0; + /* fall through */ + case 0x0: + default: + return TYPEC_CC_OPEN; + } +} + +static int tcpci_get_cc(struct tcpc_dev *tcpc, + enum typec_cc_status *cc1, enum typec_cc_status *cc2) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg; + int ret; + + ret = regmap_read(tcpci->regmap, TCPC_CC_STATUS, ®); + if (ret < 0) + return ret; + + *cc1 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC1_SHIFT) & + TCPC_CC_STATUS_CC1_MASK, + reg & TCPC_CC_STATUS_TERM); + *cc2 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC2_SHIFT) & + TCPC_CC_STATUS_CC2_MASK, + reg & TCPC_CC_STATUS_TERM); + + return 0; +} + +static int tcpci_set_polarity(struct tcpc_dev *tcpc, + enum typec_cc_polarity polarity) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg; + int ret; + + /* Keep the disconnect cc line open */ + ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, ®); + if (ret < 0) + return ret; + + if (polarity == TYPEC_POLARITY_CC2) + reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT; + else + reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT; + ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg); + if (ret < 0) + return ret; + + return regmap_write(tcpci->regmap, TCPC_TCPC_CTRL, + (polarity == TYPEC_POLARITY_CC2) ? + TCPC_TCPC_CTRL_ORIENTATION : 0); +} + +static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + int ret; + + /* Handle vendor set vconn */ + if (tcpci->data->set_vconn) { + ret = tcpci->data->set_vconn(tcpci, tcpci->data, enable); + if (ret < 0) + return ret; + } + + return regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL, + TCPC_POWER_CTRL_VCONN_ENABLE, + enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0); +} + +static int tcpci_set_roles(struct tcpc_dev *tcpc, bool attached, + enum typec_role role, enum typec_data_role data) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg; + int ret; + + reg = PD_REV20 << TCPC_MSG_HDR_INFO_REV_SHIFT; + if (role == TYPEC_SOURCE) + reg |= TCPC_MSG_HDR_INFO_PWR_ROLE; + if (data == TYPEC_HOST) + reg |= TCPC_MSG_HDR_INFO_DATA_ROLE; + ret = regmap_write(tcpci->regmap, TCPC_MSG_HDR_INFO, reg); + if (ret < 0) + return ret; + + return 0; +} + +static int tcpci_set_pd_rx(struct tcpc_dev *tcpc, bool enable) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg = 0; + int ret; + + if (enable) + reg = TCPC_RX_DETECT_SOP | TCPC_RX_DETECT_HARD_RESET; + ret = regmap_write(tcpci->regmap, TCPC_RX_DETECT, reg); + if (ret < 0) + return ret; + + return 0; +} + +static int tcpci_get_vbus(struct tcpc_dev *tcpc) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg; + int ret; + + ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, ®); + if (ret < 0) + return ret; + + return !!(reg & TCPC_POWER_STATUS_VBUS_PRES); +} + +static int tcpci_set_vbus(struct tcpc_dev *tcpc, bool source, bool sink) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + int ret; + + /* Disable both source and sink first before enabling anything */ + + if (!source) { + ret = regmap_write(tcpci->regmap, TCPC_COMMAND, + TCPC_CMD_DISABLE_SRC_VBUS); + if (ret < 0) + return ret; + } + + if (!sink) { + ret = regmap_write(tcpci->regmap, TCPC_COMMAND, + TCPC_CMD_DISABLE_SINK_VBUS); + if (ret < 0) + return ret; + } + + if (source) { + ret = regmap_write(tcpci->regmap, TCPC_COMMAND, + TCPC_CMD_SRC_VBUS_DEFAULT); + if (ret < 0) + return ret; + } + + if (sink) { + ret = regmap_write(tcpci->regmap, TCPC_COMMAND, + TCPC_CMD_SINK_VBUS); + if (ret < 0) + return ret; + } + + return 0; +} + +static int tcpci_pd_transmit(struct tcpc_dev *tcpc, + enum tcpm_transmit_type type, + const struct pd_message *msg) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + u16 header = msg ? le16_to_cpu(msg->header) : 0; + unsigned int reg, cnt; + int ret; + + cnt = msg ? pd_header_cnt(header) * 4 : 0; + ret = regmap_write(tcpci->regmap, TCPC_TX_BYTE_CNT, cnt + 2); + if (ret < 0) + return ret; + + ret = tcpci_write16(tcpci, TCPC_TX_HDR, header); + if (ret < 0) + return ret; + + if (cnt > 0) { + ret = regmap_raw_write(tcpci->regmap, TCPC_TX_DATA, + &msg->payload, cnt); + if (ret < 0) + return ret; + } + + reg = (PD_RETRY_COUNT << TCPC_TRANSMIT_RETRY_SHIFT) | + (type << TCPC_TRANSMIT_TYPE_SHIFT); + ret = regmap_write(tcpci->regmap, TCPC_TRANSMIT, reg); + if (ret < 0) + return ret; + + return 0; +} + +static int tcpci_init(struct tcpc_dev *tcpc) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned long timeout = jiffies + msecs_to_jiffies(2000); /* XXX */ + unsigned int reg; + int ret; + + while (time_before_eq(jiffies, timeout)) { + ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, ®); + if (ret < 0) + return ret; + if (!(reg & TCPC_POWER_STATUS_UNINIT)) + break; + usleep_range(10000, 20000); + } + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + + /* Handle vendor init */ + if (tcpci->data->init) { + ret = tcpci->data->init(tcpci, tcpci->data); + if (ret < 0) + return ret; + } + + /* Clear all events */ + ret = tcpci_write16(tcpci, TCPC_ALERT, 0xffff); + if (ret < 0) + return ret; + + if (tcpci->controls_vbus) + reg = TCPC_POWER_STATUS_VBUS_PRES; + else + reg = 0; + ret = regmap_write(tcpci->regmap, TCPC_POWER_STATUS_MASK, reg); + if (ret < 0) + return ret; + + /* Enable Vbus detection */ + ret = regmap_write(tcpci->regmap, TCPC_COMMAND, + TCPC_CMD_ENABLE_VBUS_DETECT); + if (ret < 0) + return ret; + + reg = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_FAILED | + TCPC_ALERT_TX_DISCARDED | TCPC_ALERT_RX_STATUS | + TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_CC_STATUS; + if (tcpci->controls_vbus) + reg |= TCPC_ALERT_POWER_STATUS; + return tcpci_write16(tcpci, TCPC_ALERT_MASK, reg); +} + +irqreturn_t tcpci_irq(struct tcpci *tcpci) +{ + u16 status; + + tcpci_read16(tcpci, TCPC_ALERT, &status); + + /* + * Clear alert status for everything except RX_STATUS, which shouldn't + * be cleared until we have successfully retrieved message. + */ + if (status & ~TCPC_ALERT_RX_STATUS) + tcpci_write16(tcpci, TCPC_ALERT, + status & ~TCPC_ALERT_RX_STATUS); + + if (status & TCPC_ALERT_CC_STATUS) + tcpm_cc_change(tcpci->port); + + if (status & TCPC_ALERT_POWER_STATUS) { + unsigned int reg; + + regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, ®); + + /* + * If power status mask has been reset, then the TCPC + * has reset. + */ + if (reg == 0xff) + tcpm_tcpc_reset(tcpci->port); + else + tcpm_vbus_change(tcpci->port); + } + + if (status & TCPC_ALERT_RX_STATUS) { + struct pd_message msg; + unsigned int cnt; + u16 header; + + regmap_read(tcpci->regmap, TCPC_RX_BYTE_CNT, &cnt); + + tcpci_read16(tcpci, TCPC_RX_HDR, &header); + msg.header = cpu_to_le16(header); + + if (WARN_ON(cnt > sizeof(msg.payload))) + cnt = sizeof(msg.payload); + + if (cnt > 0) + regmap_raw_read(tcpci->regmap, TCPC_RX_DATA, + &msg.payload, cnt); + + /* Read complete, clear RX status alert bit */ + tcpci_write16(tcpci, TCPC_ALERT, TCPC_ALERT_RX_STATUS); + + tcpm_pd_receive(tcpci->port, &msg); + } + + if (status & TCPC_ALERT_RX_HARD_RST) + tcpm_pd_hard_reset(tcpci->port); + + if (status & TCPC_ALERT_TX_SUCCESS) + tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_SUCCESS); + else if (status & TCPC_ALERT_TX_DISCARDED) + tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_DISCARDED); + else if (status & TCPC_ALERT_TX_FAILED) + tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_FAILED); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL_GPL(tcpci_irq); + +static irqreturn_t _tcpci_irq(int irq, void *dev_id) +{ + struct tcpci_chip *chip = dev_id; + + return tcpci_irq(chip->tcpci); +} + +static const struct regmap_config tcpci_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = 0x7F, /* 0x80 .. 0xFF are vendor defined */ +}; + +static int tcpci_parse_config(struct tcpci *tcpci) +{ + tcpci->controls_vbus = true; /* XXX */ + + tcpci->tcpc.fwnode = device_get_named_child_node(tcpci->dev, + "connector"); + if (!tcpci->tcpc.fwnode) { + dev_err(tcpci->dev, "Can't find connector node.\n"); + return -EINVAL; + } + + return 0; +} + +struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) +{ + struct tcpci *tcpci; + int err; + + tcpci = devm_kzalloc(dev, sizeof(*tcpci), GFP_KERNEL); + if (!tcpci) + return ERR_PTR(-ENOMEM); + + tcpci->dev = dev; + tcpci->data = data; + tcpci->regmap = data->regmap; + + tcpci->tcpc.init = tcpci_init; + tcpci->tcpc.get_vbus = tcpci_get_vbus; + tcpci->tcpc.set_vbus = tcpci_set_vbus; + tcpci->tcpc.set_cc = tcpci_set_cc; + tcpci->tcpc.get_cc = tcpci_get_cc; + tcpci->tcpc.set_polarity = tcpci_set_polarity; + tcpci->tcpc.set_vconn = tcpci_set_vconn; + tcpci->tcpc.start_drp_toggling = tcpci_start_drp_toggling; + + tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx; + tcpci->tcpc.set_roles = tcpci_set_roles; + tcpci->tcpc.pd_transmit = tcpci_pd_transmit; + + err = tcpci_parse_config(tcpci); + if (err < 0) + return ERR_PTR(err); + + tcpci->port = tcpm_register_port(tcpci->dev, &tcpci->tcpc); + if (IS_ERR(tcpci->port)) + return ERR_CAST(tcpci->port); + + return tcpci; +} +EXPORT_SYMBOL_GPL(tcpci_register_port); + +void tcpci_unregister_port(struct tcpci *tcpci) +{ + tcpm_unregister_port(tcpci->port); +} +EXPORT_SYMBOL_GPL(tcpci_unregister_port); + +static int tcpci_probe(struct i2c_client *client, + const struct i2c_device_id *i2c_id) +{ + struct tcpci_chip *chip; + int err; + u16 val = 0; + + chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->data.regmap = devm_regmap_init_i2c(client, &tcpci_regmap_config); + if (IS_ERR(chip->data.regmap)) + return PTR_ERR(chip->data.regmap); + + i2c_set_clientdata(client, chip); + + /* Disable chip interrupts before requesting irq */ + err = regmap_raw_write(chip->data.regmap, TCPC_ALERT_MASK, &val, + sizeof(u16)); + if (err < 0) + return err; + + chip->tcpci = tcpci_register_port(&client->dev, &chip->data); + if (IS_ERR(chip->tcpci)) + return PTR_ERR(chip->tcpci); + + err = devm_request_threaded_irq(&client->dev, client->irq, NULL, + _tcpci_irq, + IRQF_ONESHOT | IRQF_TRIGGER_LOW, + dev_name(&client->dev), chip); + if (err < 0) { + tcpci_unregister_port(chip->tcpci); + return err; + } + + return 0; +} + +static int tcpci_remove(struct i2c_client *client) +{ + struct tcpci_chip *chip = i2c_get_clientdata(client); + + tcpci_unregister_port(chip->tcpci); + + return 0; +} + +static const struct i2c_device_id tcpci_id[] = { + { "tcpci", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tcpci_id); + +#ifdef CONFIG_OF +static const struct of_device_id tcpci_of_match[] = { + { .compatible = "nxp,ptn5110", }, + {}, +}; +MODULE_DEVICE_TABLE(of, tcpci_of_match); +#endif + +static struct i2c_driver tcpci_i2c_driver = { + .driver = { + .name = "tcpci", + .of_match_table = of_match_ptr(tcpci_of_match), + }, + .probe = tcpci_probe, + .remove = tcpci_remove, + .id_table = tcpci_id, +}; +module_i2c_driver(tcpci_i2c_driver); + +MODULE_DESCRIPTION("USB Type-C Port Controller Interface driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h new file mode 100644 index 000000000000..303ebde26546 --- /dev/null +++ b/drivers/usb/typec/tcpm/tcpci.h @@ -0,0 +1,139 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2015-2017 Google, Inc + * + * USB Type-C Port Controller Interface. + */ + +#ifndef __LINUX_USB_TCPCI_H +#define __LINUX_USB_TCPCI_H + +#define TCPC_VENDOR_ID 0x0 +#define TCPC_PRODUCT_ID 0x2 +#define TCPC_BCD_DEV 0x4 +#define TCPC_TC_REV 0x6 +#define TCPC_PD_REV 0x8 +#define TCPC_PD_INT_REV 0xa + +#define TCPC_ALERT 0x10 +#define TCPC_ALERT_VBUS_DISCNCT BIT(11) +#define TCPC_ALERT_RX_BUF_OVF BIT(10) +#define TCPC_ALERT_FAULT BIT(9) +#define TCPC_ALERT_V_ALARM_LO BIT(8) +#define TCPC_ALERT_V_ALARM_HI BIT(7) +#define TCPC_ALERT_TX_SUCCESS BIT(6) +#define TCPC_ALERT_TX_DISCARDED BIT(5) +#define TCPC_ALERT_TX_FAILED BIT(4) +#define TCPC_ALERT_RX_HARD_RST BIT(3) +#define TCPC_ALERT_RX_STATUS BIT(2) +#define TCPC_ALERT_POWER_STATUS BIT(1) +#define TCPC_ALERT_CC_STATUS BIT(0) + +#define TCPC_ALERT_MASK 0x12 +#define TCPC_POWER_STATUS_MASK 0x14 +#define TCPC_FAULT_STATUS_MASK 0x15 +#define TCPC_CONFIG_STD_OUTPUT 0x18 + +#define TCPC_TCPC_CTRL 0x19 +#define TCPC_TCPC_CTRL_ORIENTATION BIT(0) + +#define TCPC_ROLE_CTRL 0x1a +#define TCPC_ROLE_CTRL_DRP BIT(6) +#define TCPC_ROLE_CTRL_RP_VAL_SHIFT 4 +#define TCPC_ROLE_CTRL_RP_VAL_MASK 0x3 +#define TCPC_ROLE_CTRL_RP_VAL_DEF 0x0 +#define TCPC_ROLE_CTRL_RP_VAL_1_5 0x1 +#define TCPC_ROLE_CTRL_RP_VAL_3_0 0x2 +#define TCPC_ROLE_CTRL_CC2_SHIFT 2 +#define TCPC_ROLE_CTRL_CC2_MASK 0x3 +#define TCPC_ROLE_CTRL_CC1_SHIFT 0 +#define TCPC_ROLE_CTRL_CC1_MASK 0x3 +#define TCPC_ROLE_CTRL_CC_RA 0x0 +#define TCPC_ROLE_CTRL_CC_RP 0x1 +#define TCPC_ROLE_CTRL_CC_RD 0x2 +#define TCPC_ROLE_CTRL_CC_OPEN 0x3 + +#define TCPC_FAULT_CTRL 0x1b + +#define TCPC_POWER_CTRL 0x1c +#define TCPC_POWER_CTRL_VCONN_ENABLE BIT(0) + +#define TCPC_CC_STATUS 0x1d +#define TCPC_CC_STATUS_TOGGLING BIT(5) +#define TCPC_CC_STATUS_TERM BIT(4) +#define TCPC_CC_STATUS_CC2_SHIFT 2 +#define TCPC_CC_STATUS_CC2_MASK 0x3 +#define TCPC_CC_STATUS_CC1_SHIFT 0 +#define TCPC_CC_STATUS_CC1_MASK 0x3 + +#define TCPC_POWER_STATUS 0x1e +#define TCPC_POWER_STATUS_UNINIT BIT(6) +#define TCPC_POWER_STATUS_VBUS_DET BIT(3) +#define TCPC_POWER_STATUS_VBUS_PRES BIT(2) + +#define TCPC_FAULT_STATUS 0x1f + +#define TCPC_COMMAND 0x23 +#define TCPC_CMD_WAKE_I2C 0x11 +#define TCPC_CMD_DISABLE_VBUS_DETECT 0x22 +#define TCPC_CMD_ENABLE_VBUS_DETECT 0x33 +#define TCPC_CMD_DISABLE_SINK_VBUS 0x44 +#define TCPC_CMD_SINK_VBUS 0x55 +#define TCPC_CMD_DISABLE_SRC_VBUS 0x66 +#define TCPC_CMD_SRC_VBUS_DEFAULT 0x77 +#define TCPC_CMD_SRC_VBUS_HIGH 0x88 +#define TCPC_CMD_LOOK4CONNECTION 0x99 +#define TCPC_CMD_RXONEMORE 0xAA +#define TCPC_CMD_I2C_IDLE 0xFF + +#define TCPC_DEV_CAP_1 0x24 +#define TCPC_DEV_CAP_2 0x26 +#define TCPC_STD_INPUT_CAP 0x28 +#define TCPC_STD_OUTPUT_CAP 0x29 + +#define TCPC_MSG_HDR_INFO 0x2e +#define TCPC_MSG_HDR_INFO_DATA_ROLE BIT(3) +#define TCPC_MSG_HDR_INFO_PWR_ROLE BIT(0) +#define TCPC_MSG_HDR_INFO_REV_SHIFT 1 +#define TCPC_MSG_HDR_INFO_REV_MASK 0x3 + +#define TCPC_RX_DETECT 0x2f +#define TCPC_RX_DETECT_HARD_RESET BIT(5) +#define TCPC_RX_DETECT_SOP BIT(0) + +#define TCPC_RX_BYTE_CNT 0x30 +#define TCPC_RX_BUF_FRAME_TYPE 0x31 +#define TCPC_RX_HDR 0x32 +#define TCPC_RX_DATA 0x34 /* through 0x4f */ + +#define TCPC_TRANSMIT 0x50 +#define TCPC_TRANSMIT_RETRY_SHIFT 4 +#define TCPC_TRANSMIT_RETRY_MASK 0x3 +#define TCPC_TRANSMIT_TYPE_SHIFT 0 +#define TCPC_TRANSMIT_TYPE_MASK 0x7 + +#define TCPC_TX_BYTE_CNT 0x51 +#define TCPC_TX_HDR 0x52 +#define TCPC_TX_DATA 0x54 /* through 0x6f */ + +#define TCPC_VBUS_VOLTAGE 0x70 +#define TCPC_VBUS_SINK_DISCONNECT_THRESH 0x72 +#define TCPC_VBUS_STOP_DISCHARGE_THRESH 0x74 +#define TCPC_VBUS_VOLTAGE_ALARM_HI_CFG 0x76 +#define TCPC_VBUS_VOLTAGE_ALARM_LO_CFG 0x78 + +struct tcpci; +struct tcpci_data { + struct regmap *regmap; + int (*init)(struct tcpci *tcpci, struct tcpci_data *data); + int (*set_vconn)(struct tcpci *tcpci, struct tcpci_data *data, + bool enable); + int (*start_drp_toggling)(struct tcpci *tcpci, struct tcpci_data *data, + enum typec_cc_status cc); +}; + +struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data); +void tcpci_unregister_port(struct tcpci *tcpci); +irqreturn_t tcpci_irq(struct tcpci *tcpci); + +#endif /* __LINUX_USB_TCPCI_H */ diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c new file mode 100644 index 000000000000..017389021b96 --- /dev/null +++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c @@ -0,0 +1,312 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018, Richtek Technology Corporation + * + * Richtek RT1711H Type-C Chip Driver + */ + +#include +#include +#include +#include +#include +#include +#include +#include "tcpci.h" + +#define RT1711H_VID 0x29CF +#define RT1711H_PID 0x1711 + +#define RT1711H_RTCTRL8 0x9B + +/* Autoidle timeout = (tout * 2 + 1) * 6.4ms */ +#define RT1711H_RTCTRL8_SET(ck300, ship_off, auto_idle, tout) \ + (((ck300) << 7) | ((ship_off) << 5) | \ + ((auto_idle) << 3) | ((tout) & 0x07)) + +#define RT1711H_RTCTRL11 0x9E + +/* I2C timeout = (tout + 1) * 12.5ms */ +#define RT1711H_RTCTRL11_SET(en, tout) \ + (((en) << 7) | ((tout) & 0x0F)) + +#define RT1711H_RTCTRL13 0xA0 +#define RT1711H_RTCTRL14 0xA1 +#define RT1711H_RTCTRL15 0xA2 +#define RT1711H_RTCTRL16 0xA3 + +struct rt1711h_chip { + struct tcpci_data data; + struct tcpci *tcpci; + struct device *dev; +}; + +static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val) +{ + return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u16)); +} + +static int rt1711h_write16(struct rt1711h_chip *chip, unsigned int reg, u16 val) +{ + return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u16)); +} + +static int rt1711h_read8(struct rt1711h_chip *chip, unsigned int reg, u8 *val) +{ + return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u8)); +} + +static int rt1711h_write8(struct rt1711h_chip *chip, unsigned int reg, u8 val) +{ + return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u8)); +} + +static const struct regmap_config rt1711h_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = 0xFF, /* 0x80 .. 0xFF are vendor defined */ +}; + +static struct rt1711h_chip *tdata_to_rt1711h(struct tcpci_data *tdata) +{ + return container_of(tdata, struct rt1711h_chip, data); +} + +static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata) +{ + int ret; + struct rt1711h_chip *chip = tdata_to_rt1711h(tdata); + + /* CK 300K from 320K, shipping off, auto_idle enable, tout = 32ms */ + ret = rt1711h_write8(chip, RT1711H_RTCTRL8, + RT1711H_RTCTRL8_SET(0, 1, 1, 2)); + if (ret < 0) + return ret; + + /* I2C reset : (val + 1) * 12.5ms */ + ret = rt1711h_write8(chip, RT1711H_RTCTRL11, + RT1711H_RTCTRL11_SET(1, 0x0F)); + if (ret < 0) + return ret; + + /* tTCPCfilter : (26.7 * val) us */ + ret = rt1711h_write8(chip, RT1711H_RTCTRL14, 0x0F); + if (ret < 0) + return ret; + + /* tDRP : (51.2 + 6.4 * val) ms */ + ret = rt1711h_write8(chip, RT1711H_RTCTRL15, 0x04); + if (ret < 0) + return ret; + + /* dcSRC.DRP : 33% */ + return rt1711h_write16(chip, RT1711H_RTCTRL16, 330); +} + +static int rt1711h_set_vconn(struct tcpci *tcpci, struct tcpci_data *tdata, + bool enable) +{ + struct rt1711h_chip *chip = tdata_to_rt1711h(tdata); + + return rt1711h_write8(chip, RT1711H_RTCTRL8, + RT1711H_RTCTRL8_SET(0, 1, !enable, 2)); +} + +static int rt1711h_start_drp_toggling(struct tcpci *tcpci, + struct tcpci_data *tdata, + enum typec_cc_status cc) +{ + struct rt1711h_chip *chip = tdata_to_rt1711h(tdata); + int ret; + unsigned int reg = 0; + + switch (cc) { + default: + case TYPEC_CC_RP_DEF: + reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + case TYPEC_CC_RP_1_5: + reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + case TYPEC_CC_RP_3_0: + reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 << + TCPC_ROLE_CTRL_RP_VAL_SHIFT); + break; + } + + if (cc == TYPEC_CC_RD) + reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT); + else + reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) | + (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT); + + ret = rt1711h_write8(chip, TCPC_ROLE_CTRL, reg); + if (ret < 0) + return ret; + usleep_range(500, 1000); + + return 0; +} + +static irqreturn_t rt1711h_irq(int irq, void *dev_id) +{ + int ret; + u16 alert; + u8 status; + struct rt1711h_chip *chip = dev_id; + + if (!chip->tcpci) + return IRQ_HANDLED; + + ret = rt1711h_read16(chip, TCPC_ALERT, &alert); + if (ret < 0) + goto out; + + if (alert & TCPC_ALERT_CC_STATUS) { + ret = rt1711h_read8(chip, TCPC_CC_STATUS, &status); + if (ret < 0) + goto out; + /* Clear cc change event triggered by starting toggling */ + if (status & TCPC_CC_STATUS_TOGGLING) + rt1711h_write8(chip, TCPC_ALERT, TCPC_ALERT_CC_STATUS); + } + +out: + return tcpci_irq(chip->tcpci); +} + +static int rt1711h_init_alert(struct rt1711h_chip *chip, + struct i2c_client *client) +{ + int ret; + + /* Disable chip interrupts before requesting irq */ + ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0); + if (ret < 0) + return ret; + + ret = devm_request_threaded_irq(chip->dev, client->irq, NULL, + rt1711h_irq, + IRQF_ONESHOT | IRQF_TRIGGER_LOW, + dev_name(chip->dev), chip); + if (ret < 0) + return ret; + enable_irq_wake(client->irq); + return 0; +} + +static int rt1711h_sw_reset(struct rt1711h_chip *chip) +{ + int ret; + + ret = rt1711h_write8(chip, RT1711H_RTCTRL13, 0x01); + if (ret < 0) + return ret; + + usleep_range(1000, 2000); + return 0; +} + +static int rt1711h_check_revision(struct i2c_client *i2c) +{ + int ret; + + ret = i2c_smbus_read_word_data(i2c, TCPC_VENDOR_ID); + if (ret < 0) + return ret; + if (ret != RT1711H_VID) { + dev_err(&i2c->dev, "vid is not correct, 0x%04x\n", ret); + return -ENODEV; + } + ret = i2c_smbus_read_word_data(i2c, TCPC_PRODUCT_ID); + if (ret < 0) + return ret; + if (ret != RT1711H_PID) { + dev_err(&i2c->dev, "pid is not correct, 0x%04x\n", ret); + return -ENODEV; + } + return 0; +} + +static int rt1711h_probe(struct i2c_client *client, + const struct i2c_device_id *i2c_id) +{ + int ret; + struct rt1711h_chip *chip; + + ret = rt1711h_check_revision(client); + if (ret < 0) { + dev_err(&client->dev, "check vid/pid fail\n"); + return ret; + } + + chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->data.regmap = devm_regmap_init_i2c(client, + &rt1711h_regmap_config); + if (IS_ERR(chip->data.regmap)) + return PTR_ERR(chip->data.regmap); + + chip->dev = &client->dev; + i2c_set_clientdata(client, chip); + + ret = rt1711h_sw_reset(chip); + if (ret < 0) + return ret; + + ret = rt1711h_init_alert(chip, client); + if (ret < 0) + return ret; + + chip->data.init = rt1711h_init; + chip->data.set_vconn = rt1711h_set_vconn; + chip->data.start_drp_toggling = rt1711h_start_drp_toggling; + chip->tcpci = tcpci_register_port(chip->dev, &chip->data); + if (IS_ERR_OR_NULL(chip->tcpci)) + return PTR_ERR(chip->tcpci); + + return 0; +} + +static int rt1711h_remove(struct i2c_client *client) +{ + struct rt1711h_chip *chip = i2c_get_clientdata(client); + + tcpci_unregister_port(chip->tcpci); + return 0; +} + +static const struct i2c_device_id rt1711h_id[] = { + { "rt1711h", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, rt1711h_id); + +#ifdef CONFIG_OF +static const struct of_device_id rt1711h_of_match[] = { + { .compatible = "richtek,rt1711h", }, + {}, +}; +MODULE_DEVICE_TABLE(of, rt1711h_of_match); +#endif + +static struct i2c_driver rt1711h_i2c_driver = { + .driver = { + .name = "rt1711h", + .of_match_table = of_match_ptr(rt1711h_of_match), + }, + .probe = rt1711h_probe, + .remove = rt1711h_remove, + .id_table = rt1711h_id, +}; +module_i2c_driver(rt1711h_i2c_driver); + +MODULE_AUTHOR("ShuFan Lee "); +MODULE_DESCRIPTION("RT1711H USB Type-C Port Controller Interface Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c new file mode 100644 index 000000000000..4f1f4215f3d6 --- /dev/null +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -0,0 +1,4851 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2015-2017 Google, Inc + * + * USB Power Delivery protocol stack. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define FOREACH_STATE(S) \ + S(INVALID_STATE), \ + S(DRP_TOGGLING), \ + S(SRC_UNATTACHED), \ + S(SRC_ATTACH_WAIT), \ + S(SRC_ATTACHED), \ + S(SRC_STARTUP), \ + S(SRC_SEND_CAPABILITIES), \ + S(SRC_NEGOTIATE_CAPABILITIES), \ + S(SRC_TRANSITION_SUPPLY), \ + S(SRC_READY), \ + S(SRC_WAIT_NEW_CAPABILITIES), \ + \ + S(SNK_UNATTACHED), \ + S(SNK_ATTACH_WAIT), \ + S(SNK_DEBOUNCED), \ + S(SNK_ATTACHED), \ + S(SNK_STARTUP), \ + S(SNK_DISCOVERY), \ + S(SNK_DISCOVERY_DEBOUNCE), \ + S(SNK_DISCOVERY_DEBOUNCE_DONE), \ + S(SNK_WAIT_CAPABILITIES), \ + S(SNK_NEGOTIATE_CAPABILITIES), \ + S(SNK_NEGOTIATE_PPS_CAPABILITIES), \ + S(SNK_TRANSITION_SINK), \ + S(SNK_TRANSITION_SINK_VBUS), \ + S(SNK_READY), \ + \ + S(ACC_UNATTACHED), \ + S(DEBUG_ACC_ATTACHED), \ + S(AUDIO_ACC_ATTACHED), \ + S(AUDIO_ACC_DEBOUNCE), \ + \ + S(HARD_RESET_SEND), \ + S(HARD_RESET_START), \ + S(SRC_HARD_RESET_VBUS_OFF), \ + S(SRC_HARD_RESET_VBUS_ON), \ + S(SNK_HARD_RESET_SINK_OFF), \ + S(SNK_HARD_RESET_WAIT_VBUS), \ + S(SNK_HARD_RESET_SINK_ON), \ + \ + S(SOFT_RESET), \ + S(SOFT_RESET_SEND), \ + \ + S(DR_SWAP_ACCEPT), \ + S(DR_SWAP_SEND), \ + S(DR_SWAP_SEND_TIMEOUT), \ + S(DR_SWAP_CANCEL), \ + S(DR_SWAP_CHANGE_DR), \ + \ + S(PR_SWAP_ACCEPT), \ + S(PR_SWAP_SEND), \ + S(PR_SWAP_SEND_TIMEOUT), \ + S(PR_SWAP_CANCEL), \ + S(PR_SWAP_START), \ + S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \ + S(PR_SWAP_SRC_SNK_SOURCE_OFF), \ + S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \ + S(PR_SWAP_SRC_SNK_SINK_ON), \ + S(PR_SWAP_SNK_SRC_SINK_OFF), \ + S(PR_SWAP_SNK_SRC_SOURCE_ON), \ + S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \ + \ + S(VCONN_SWAP_ACCEPT), \ + S(VCONN_SWAP_SEND), \ + S(VCONN_SWAP_SEND_TIMEOUT), \ + S(VCONN_SWAP_CANCEL), \ + S(VCONN_SWAP_START), \ + S(VCONN_SWAP_WAIT_FOR_VCONN), \ + S(VCONN_SWAP_TURN_ON_VCONN), \ + S(VCONN_SWAP_TURN_OFF_VCONN), \ + \ + S(SNK_TRY), \ + S(SNK_TRY_WAIT), \ + S(SNK_TRY_WAIT_DEBOUNCE), \ + S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \ + S(SRC_TRYWAIT), \ + S(SRC_TRYWAIT_DEBOUNCE), \ + S(SRC_TRYWAIT_UNATTACHED), \ + \ + S(SRC_TRY), \ + S(SRC_TRY_WAIT), \ + S(SRC_TRY_DEBOUNCE), \ + S(SNK_TRYWAIT), \ + S(SNK_TRYWAIT_DEBOUNCE), \ + S(SNK_TRYWAIT_VBUS), \ + S(BIST_RX), \ + \ + S(GET_STATUS_SEND), \ + S(GET_STATUS_SEND_TIMEOUT), \ + S(GET_PPS_STATUS_SEND), \ + S(GET_PPS_STATUS_SEND_TIMEOUT), \ + \ + S(ERROR_RECOVERY), \ + S(PORT_RESET), \ + S(PORT_RESET_WAIT_OFF) + +#define GENERATE_ENUM(e) e +#define GENERATE_STRING(s) #s + +enum tcpm_state { + FOREACH_STATE(GENERATE_ENUM) +}; + +static const char * const tcpm_states[] = { + FOREACH_STATE(GENERATE_STRING) +}; + +enum vdm_states { + VDM_STATE_ERR_BUSY = -3, + VDM_STATE_ERR_SEND = -2, + VDM_STATE_ERR_TMOUT = -1, + VDM_STATE_DONE = 0, + /* Anything >0 represents an active state */ + VDM_STATE_READY = 1, + VDM_STATE_BUSY = 2, + VDM_STATE_WAIT_RSP_BUSY = 3, +}; + +enum pd_msg_request { + PD_MSG_NONE = 0, + PD_MSG_CTRL_REJECT, + PD_MSG_CTRL_WAIT, + PD_MSG_CTRL_NOT_SUPP, + PD_MSG_DATA_SINK_CAP, + PD_MSG_DATA_SOURCE_CAP, +}; + +/* Events from low level driver */ + +#define TCPM_CC_EVENT BIT(0) +#define TCPM_VBUS_EVENT BIT(1) +#define TCPM_RESET_EVENT BIT(2) + +#define LOG_BUFFER_ENTRIES 1024 +#define LOG_BUFFER_ENTRY_SIZE 128 + +/* Alternate mode support */ + +#define SVID_DISCOVERY_MAX 16 +#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX) + +struct pd_mode_data { + int svid_index; /* current SVID index */ + int nsvids; + u16 svids[SVID_DISCOVERY_MAX]; + int altmodes; /* number of alternate modes */ + struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX]; +}; + +struct pd_pps_data { + u32 min_volt; + u32 max_volt; + u32 max_curr; + u32 out_volt; + u32 op_curr; + bool supported; + bool active; +}; + +struct tcpm_port { + struct device *dev; + + struct mutex lock; /* tcpm state machine lock */ + struct workqueue_struct *wq; + + struct typec_capability typec_caps; + struct typec_port *typec_port; + + struct tcpc_dev *tcpc; + struct usb_role_switch *role_sw; + + enum typec_role vconn_role; + enum typec_role pwr_role; + enum typec_data_role data_role; + enum typec_pwr_opmode pwr_opmode; + + struct usb_pd_identity partner_ident; + struct typec_partner_desc partner_desc; + struct typec_partner *partner; + + enum typec_cc_status cc_req; + + enum typec_cc_status cc1; + enum typec_cc_status cc2; + enum typec_cc_polarity polarity; + + bool attached; + bool connected; + enum typec_port_type port_type; + bool vbus_present; + bool vbus_never_low; + bool vbus_source; + bool vbus_charge; + + bool send_discover; + bool op_vsafe5v; + + int try_role; + int try_snk_count; + int try_src_count; + + enum pd_msg_request queued_message; + + enum tcpm_state enter_state; + enum tcpm_state prev_state; + enum tcpm_state state; + enum tcpm_state delayed_state; + unsigned long delayed_runtime; + unsigned long delay_ms; + + spinlock_t pd_event_lock; + u32 pd_events; + + struct work_struct event_work; + struct delayed_work state_machine; + struct delayed_work vdm_state_machine; + bool state_machine_running; + + struct completion tx_complete; + enum tcpm_transmit_status tx_status; + + struct mutex swap_lock; /* swap command lock */ + bool swap_pending; + bool non_pd_role_swap; + struct completion swap_complete; + int swap_status; + + unsigned int negotiated_rev; + unsigned int message_id; + unsigned int caps_count; + unsigned int hard_reset_count; + bool pd_capable; + bool explicit_contract; + unsigned int rx_msgid; + + /* Partner capabilities/requests */ + u32 sink_request; + u32 source_caps[PDO_MAX_OBJECTS]; + unsigned int nr_source_caps; + u32 sink_caps[PDO_MAX_OBJECTS]; + unsigned int nr_sink_caps; + + /* Local capabilities */ + u32 src_pdo[PDO_MAX_OBJECTS]; + unsigned int nr_src_pdo; + u32 snk_pdo[PDO_MAX_OBJECTS]; + unsigned int nr_snk_pdo; + u32 snk_vdo[VDO_MAX_OBJECTS]; + unsigned int nr_snk_vdo; + + unsigned int operating_snk_mw; + bool update_sink_caps; + + /* Requested current / voltage */ + u32 current_limit; + u32 supply_voltage; + + /* Used to export TA voltage and current */ + struct power_supply *psy; + struct power_supply_desc psy_desc; + enum power_supply_usb_type usb_type; + + u32 bist_request; + + /* PD state for Vendor Defined Messages */ + enum vdm_states vdm_state; + u32 vdm_retries; + /* next Vendor Defined Message to send */ + u32 vdo_data[VDO_MAX_SIZE]; + u8 vdo_count; + /* VDO to retry if UFP responder replied busy */ + u32 vdo_retry; + + /* PPS */ + struct pd_pps_data pps_data; + struct completion pps_complete; + bool pps_pending; + int pps_status; + + /* Alternate mode data */ + struct pd_mode_data mode_data; + struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX]; + struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX]; + + /* Deadline in jiffies to exit src_try_wait state */ + unsigned long max_wait; + +#ifdef CONFIG_DEBUG_FS + struct dentry *dentry; + struct mutex logbuffer_lock; /* log buffer access lock */ + int logbuffer_head; + int logbuffer_tail; + u8 *logbuffer[LOG_BUFFER_ENTRIES]; +#endif +}; + +struct pd_rx_event { + struct work_struct work; + struct tcpm_port *port; + struct pd_message msg; +}; + +#define tcpm_cc_is_sink(cc) \ + ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \ + (cc) == TYPEC_CC_RP_3_0) + +#define tcpm_port_is_sink(port) \ + ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \ + (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1))) + +#define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD) +#define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA) +#define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN) + +#define tcpm_port_is_source(port) \ + ((tcpm_cc_is_source((port)->cc1) && \ + !tcpm_cc_is_source((port)->cc2)) || \ + (tcpm_cc_is_source((port)->cc2) && \ + !tcpm_cc_is_source((port)->cc1))) + +#define tcpm_port_is_debug(port) \ + (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2)) + +#define tcpm_port_is_audio(port) \ + (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2)) + +#define tcpm_port_is_audio_detached(port) \ + ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \ + (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1))) + +#define tcpm_try_snk(port) \ + ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \ + (port)->port_type == TYPEC_PORT_DRP) + +#define tcpm_try_src(port) \ + ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \ + (port)->port_type == TYPEC_PORT_DRP) + +static enum tcpm_state tcpm_default_state(struct tcpm_port *port) +{ + if (port->port_type == TYPEC_PORT_DRP) { + if (port->try_role == TYPEC_SINK) + return SNK_UNATTACHED; + else if (port->try_role == TYPEC_SOURCE) + return SRC_UNATTACHED; + else if (port->tcpc->config->default_role == TYPEC_SINK) + return SNK_UNATTACHED; + /* Fall through to return SRC_UNATTACHED */ + } else if (port->port_type == TYPEC_PORT_SNK) { + return SNK_UNATTACHED; + } + return SRC_UNATTACHED; +} + +static inline +struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap) +{ + return container_of(cap, struct tcpm_port, typec_caps); +} + +static bool tcpm_port_is_disconnected(struct tcpm_port *port) +{ + return (!port->attached && port->cc1 == TYPEC_CC_OPEN && + port->cc2 == TYPEC_CC_OPEN) || + (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 && + port->cc1 == TYPEC_CC_OPEN) || + (port->polarity == TYPEC_POLARITY_CC2 && + port->cc2 == TYPEC_CC_OPEN))); +} + +/* + * Logging + */ + +#ifdef CONFIG_DEBUG_FS + +static bool tcpm_log_full(struct tcpm_port *port) +{ + return port->logbuffer_tail == + (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; +} + +__printf(2, 0) +static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args) +{ + char tmpbuffer[LOG_BUFFER_ENTRY_SIZE]; + u64 ts_nsec = local_clock(); + unsigned long rem_nsec; + + mutex_lock(&port->logbuffer_lock); + if (!port->logbuffer[port->logbuffer_head]) { + port->logbuffer[port->logbuffer_head] = + kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL); + if (!port->logbuffer[port->logbuffer_head]) { + mutex_unlock(&port->logbuffer_lock); + return; + } + } + + vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args); + + if (tcpm_log_full(port)) { + port->logbuffer_head = max(port->logbuffer_head - 1, 0); + strcpy(tmpbuffer, "overflow"); + } + + if (port->logbuffer_head < 0 || + port->logbuffer_head >= LOG_BUFFER_ENTRIES) { + dev_warn(port->dev, + "Bad log buffer index %d\n", port->logbuffer_head); + goto abort; + } + + if (!port->logbuffer[port->logbuffer_head]) { + dev_warn(port->dev, + "Log buffer index %d is NULL\n", port->logbuffer_head); + goto abort; + } + + rem_nsec = do_div(ts_nsec, 1000000000); + scnprintf(port->logbuffer[port->logbuffer_head], + LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s", + (unsigned long)ts_nsec, rem_nsec / 1000, + tmpbuffer); + port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; + +abort: + mutex_unlock(&port->logbuffer_lock); +} + +__printf(2, 3) +static void tcpm_log(struct tcpm_port *port, const char *fmt, ...) +{ + va_list args; + + /* Do not log while disconnected and unattached */ + if (tcpm_port_is_disconnected(port) && + (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED || + port->state == DRP_TOGGLING)) + return; + + va_start(args, fmt); + _tcpm_log(port, fmt, args); + va_end(args); +} + +__printf(2, 3) +static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + _tcpm_log(port, fmt, args); + va_end(args); +} + +static void tcpm_log_source_caps(struct tcpm_port *port) +{ + int i; + + for (i = 0; i < port->nr_source_caps; i++) { + u32 pdo = port->source_caps[i]; + enum pd_pdo_type type = pdo_type(pdo); + char msg[64]; + + switch (type) { + case PDO_TYPE_FIXED: + scnprintf(msg, sizeof(msg), + "%u mV, %u mA [%s%s%s%s%s%s]", + pdo_fixed_voltage(pdo), + pdo_max_current(pdo), + (pdo & PDO_FIXED_DUAL_ROLE) ? + "R" : "", + (pdo & PDO_FIXED_SUSPEND) ? + "S" : "", + (pdo & PDO_FIXED_HIGHER_CAP) ? + "H" : "", + (pdo & PDO_FIXED_USB_COMM) ? + "U" : "", + (pdo & PDO_FIXED_DATA_SWAP) ? + "D" : "", + (pdo & PDO_FIXED_EXTPOWER) ? + "E" : ""); + break; + case PDO_TYPE_VAR: + scnprintf(msg, sizeof(msg), + "%u-%u mV, %u mA", + pdo_min_voltage(pdo), + pdo_max_voltage(pdo), + pdo_max_current(pdo)); + break; + case PDO_TYPE_BATT: + scnprintf(msg, sizeof(msg), + "%u-%u mV, %u mW", + pdo_min_voltage(pdo), + pdo_max_voltage(pdo), + pdo_max_power(pdo)); + break; + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) + scnprintf(msg, sizeof(msg), + "%u-%u mV, %u mA", + pdo_pps_apdo_min_voltage(pdo), + pdo_pps_apdo_max_voltage(pdo), + pdo_pps_apdo_max_current(pdo)); + else + strcpy(msg, "undefined APDO"); + break; + default: + strcpy(msg, "undefined"); + break; + } + tcpm_log(port, " PDO %d: type %d, %s", + i, type, msg); + } +} + +static int tcpm_debug_show(struct seq_file *s, void *v) +{ + struct tcpm_port *port = (struct tcpm_port *)s->private; + int tail; + + mutex_lock(&port->logbuffer_lock); + tail = port->logbuffer_tail; + while (tail != port->logbuffer_head) { + seq_printf(s, "%s\n", port->logbuffer[tail]); + tail = (tail + 1) % LOG_BUFFER_ENTRIES; + } + if (!seq_has_overflowed(s)) + port->logbuffer_tail = tail; + mutex_unlock(&port->logbuffer_lock); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(tcpm_debug); + +static struct dentry *rootdir; + +static void tcpm_debugfs_init(struct tcpm_port *port) +{ + mutex_init(&port->logbuffer_lock); + /* /sys/kernel/debug/tcpm/usbcX */ + if (!rootdir) + rootdir = debugfs_create_dir("tcpm", NULL); + + port->dentry = debugfs_create_file(dev_name(port->dev), + S_IFREG | 0444, rootdir, + port, &tcpm_debug_fops); +} + +static void tcpm_debugfs_exit(struct tcpm_port *port) +{ + debugfs_remove(port->dentry); +} + +#else + +__printf(2, 3) +static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { } +__printf(2, 3) +static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { } +static void tcpm_log_source_caps(struct tcpm_port *port) { } +static void tcpm_debugfs_init(const struct tcpm_port *port) { } +static void tcpm_debugfs_exit(const struct tcpm_port *port) { } + +#endif + +static int tcpm_pd_transmit(struct tcpm_port *port, + enum tcpm_transmit_type type, + const struct pd_message *msg) +{ + unsigned long timeout; + int ret; + + if (msg) + tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header)); + else + tcpm_log(port, "PD TX, type: %#x", type); + + reinit_completion(&port->tx_complete); + ret = port->tcpc->pd_transmit(port->tcpc, type, msg); + if (ret < 0) + return ret; + + mutex_unlock(&port->lock); + timeout = wait_for_completion_timeout(&port->tx_complete, + msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT)); + mutex_lock(&port->lock); + if (!timeout) + return -ETIMEDOUT; + + switch (port->tx_status) { + case TCPC_TX_SUCCESS: + port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK; + return 0; + case TCPC_TX_DISCARDED: + return -EAGAIN; + case TCPC_TX_FAILED: + default: + return -EIO; + } +} + +void tcpm_pd_transmit_complete(struct tcpm_port *port, + enum tcpm_transmit_status status) +{ + tcpm_log(port, "PD TX complete, status: %u", status); + port->tx_status = status; + complete(&port->tx_complete); +} +EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete); + +static int tcpm_mux_set(struct tcpm_port *port, int state, + enum usb_role usb_role, + enum typec_orientation orientation) +{ + int ret; + + tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d", + state, usb_role, orientation); + + ret = typec_set_orientation(port->typec_port, orientation); + if (ret) + return ret; + + if (port->role_sw) { + ret = usb_role_switch_set_role(port->role_sw, usb_role); + if (ret) + return ret; + } + + return typec_set_mode(port->typec_port, state); +} + +static int tcpm_set_polarity(struct tcpm_port *port, + enum typec_cc_polarity polarity) +{ + int ret; + + tcpm_log(port, "polarity %d", polarity); + + ret = port->tcpc->set_polarity(port->tcpc, polarity); + if (ret < 0) + return ret; + + port->polarity = polarity; + + return 0; +} + +static int tcpm_set_vconn(struct tcpm_port *port, bool enable) +{ + int ret; + + tcpm_log(port, "vconn:=%d", enable); + + ret = port->tcpc->set_vconn(port->tcpc, enable); + if (!ret) { + port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK; + typec_set_vconn_role(port->typec_port, port->vconn_role); + } + + return ret; +} + +static u32 tcpm_get_current_limit(struct tcpm_port *port) +{ + enum typec_cc_status cc; + u32 limit; + + cc = port->polarity ? port->cc2 : port->cc1; + switch (cc) { + case TYPEC_CC_RP_1_5: + limit = 1500; + break; + case TYPEC_CC_RP_3_0: + limit = 3000; + break; + case TYPEC_CC_RP_DEF: + default: + if (port->tcpc->get_current_limit) + limit = port->tcpc->get_current_limit(port->tcpc); + else + limit = 0; + break; + } + + return limit; +} + +static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv) +{ + int ret = -EOPNOTSUPP; + + tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma); + + port->supply_voltage = mv; + port->current_limit = max_ma; + + if (port->tcpc->set_current_limit) + ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv); + + return ret; +} + +/* + * Determine RP value to set based on maximum current supported + * by a port if configured as source. + * Returns CC value to report to link partner. + */ +static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port) +{ + const u32 *src_pdo = port->src_pdo; + int nr_pdo = port->nr_src_pdo; + int i; + + /* + * Search for first entry with matching voltage. + * It should report the maximum supported current. + */ + for (i = 0; i < nr_pdo; i++) { + const u32 pdo = src_pdo[i]; + + if (pdo_type(pdo) == PDO_TYPE_FIXED && + pdo_fixed_voltage(pdo) == 5000) { + unsigned int curr = pdo_max_current(pdo); + + if (curr >= 3000) + return TYPEC_CC_RP_3_0; + else if (curr >= 1500) + return TYPEC_CC_RP_1_5; + return TYPEC_CC_RP_DEF; + } + } + + return TYPEC_CC_RP_DEF; +} + +static int tcpm_set_attached_state(struct tcpm_port *port, bool attached) +{ + return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role, + port->data_role); +} + +static int tcpm_set_roles(struct tcpm_port *port, bool attached, + enum typec_role role, enum typec_data_role data) +{ + enum typec_orientation orientation; + enum usb_role usb_role; + int ret; + + if (port->polarity == TYPEC_POLARITY_CC1) + orientation = TYPEC_ORIENTATION_NORMAL; + else + orientation = TYPEC_ORIENTATION_REVERSE; + + if (data == TYPEC_HOST) + usb_role = USB_ROLE_HOST; + else + usb_role = USB_ROLE_DEVICE; + + ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation); + if (ret < 0) + return ret; + + ret = port->tcpc->set_roles(port->tcpc, attached, role, data); + if (ret < 0) + return ret; + + port->pwr_role = role; + port->data_role = data; + typec_set_data_role(port->typec_port, data); + typec_set_pwr_role(port->typec_port, role); + + return 0; +} + +static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role) +{ + int ret; + + ret = port->tcpc->set_roles(port->tcpc, true, role, + port->data_role); + if (ret < 0) + return ret; + + port->pwr_role = role; + typec_set_pwr_role(port->typec_port, role); + + return 0; +} + +static int tcpm_pd_send_source_caps(struct tcpm_port *port) +{ + struct pd_message msg; + int i; + + memset(&msg, 0, sizeof(msg)); + if (!port->nr_src_pdo) { + /* No source capabilities defined, sink only */ + msg.header = PD_HEADER_LE(PD_CTRL_REJECT, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 0); + } else { + msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, + port->nr_src_pdo); + } + for (i = 0; i < port->nr_src_pdo; i++) + msg.payload[i] = cpu_to_le32(port->src_pdo[i]); + + return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); +} + +static int tcpm_pd_send_sink_caps(struct tcpm_port *port) +{ + struct pd_message msg; + int i; + + memset(&msg, 0, sizeof(msg)); + if (!port->nr_snk_pdo) { + /* No sink capabilities defined, source only */ + msg.header = PD_HEADER_LE(PD_CTRL_REJECT, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 0); + } else { + msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, + port->nr_snk_pdo); + } + for (i = 0; i < port->nr_snk_pdo; i++) + msg.payload[i] = cpu_to_le32(port->snk_pdo[i]); + + return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); +} + +static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state, + unsigned int delay_ms) +{ + if (delay_ms) { + tcpm_log(port, "pending state change %s -> %s @ %u ms", + tcpm_states[port->state], tcpm_states[state], + delay_ms); + port->delayed_state = state; + mod_delayed_work(port->wq, &port->state_machine, + msecs_to_jiffies(delay_ms)); + port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms); + port->delay_ms = delay_ms; + } else { + tcpm_log(port, "state change %s -> %s", + tcpm_states[port->state], tcpm_states[state]); + port->delayed_state = INVALID_STATE; + port->prev_state = port->state; + port->state = state; + /* + * Don't re-queue the state machine work item if we're currently + * in the state machine and we're immediately changing states. + * tcpm_state_machine_work() will continue running the state + * machine. + */ + if (!port->state_machine_running) + mod_delayed_work(port->wq, &port->state_machine, 0); + } +} + +static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state, + unsigned int delay_ms) +{ + if (port->enter_state == port->state) + tcpm_set_state(port, state, delay_ms); + else + tcpm_log(port, + "skipped %sstate change %s -> %s [%u ms], context state %s", + delay_ms ? "delayed " : "", + tcpm_states[port->state], tcpm_states[state], + delay_ms, tcpm_states[port->enter_state]); +} + +static void tcpm_queue_message(struct tcpm_port *port, + enum pd_msg_request message) +{ + port->queued_message = message; + mod_delayed_work(port->wq, &port->state_machine, 0); +} + +/* + * VDM/VDO handling functions + */ +static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header, + const u32 *data, int cnt) +{ + port->vdo_count = cnt + 1; + port->vdo_data[0] = header; + memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt); + /* Set ready, vdm state machine will actually send */ + port->vdm_retries = 0; + port->vdm_state = VDM_STATE_READY; +} + +static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload, + int cnt) +{ + u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]); + u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]); + + memset(&port->mode_data, 0, sizeof(port->mode_data)); + + port->partner_ident.id_header = vdo; + port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]); + port->partner_ident.product = product; + + typec_partner_set_identity(port->partner); + + tcpm_log(port, "Identity: %04x:%04x.%04x", + PD_IDH_VID(vdo), + PD_PRODUCT_PID(product), product & 0xffff); +} + +static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload, + int cnt) +{ + struct pd_mode_data *pmdata = &port->mode_data; + int i; + + for (i = 1; i < cnt; i++) { + u32 p = le32_to_cpu(payload[i]); + u16 svid; + + svid = (p >> 16) & 0xffff; + if (!svid) + return false; + + if (pmdata->nsvids >= SVID_DISCOVERY_MAX) + goto abort; + + pmdata->svids[pmdata->nsvids++] = svid; + tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid); + + svid = p & 0xffff; + if (!svid) + return false; + + if (pmdata->nsvids >= SVID_DISCOVERY_MAX) + goto abort; + + pmdata->svids[pmdata->nsvids++] = svid; + tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid); + } + return true; +abort: + tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX); + return false; +} + +static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload, + int cnt) +{ + struct pd_mode_data *pmdata = &port->mode_data; + struct typec_altmode_desc *paltmode; + int i; + + if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) { + /* Already logged in svdm_consume_svids() */ + return; + } + + for (i = 1; i < cnt; i++) { + paltmode = &pmdata->altmode_desc[pmdata->altmodes]; + memset(paltmode, 0, sizeof(*paltmode)); + + paltmode->svid = pmdata->svids[pmdata->svid_index]; + paltmode->mode = i; + paltmode->vdo = le32_to_cpu(payload[i]); + + tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x", + pmdata->altmodes, paltmode->svid, + paltmode->mode, paltmode->vdo); + + pmdata->altmodes++; + } +} + +static void tcpm_register_partner_altmodes(struct tcpm_port *port) +{ + struct pd_mode_data *modep = &port->mode_data; + struct typec_altmode *altmode; + int i; + + for (i = 0; i < modep->altmodes; i++) { + altmode = typec_partner_register_altmode(port->partner, + &modep->altmode_desc[i]); + if (!altmode) + tcpm_log(port, "Failed to register partner SVID 0x%04x", + modep->altmode_desc[i].svid); + port->partner_altmode[i] = altmode; + } +} + +#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header) + +static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt, + u32 *response) +{ + struct typec_altmode *adev; + struct typec_altmode *pdev; + struct pd_mode_data *modep; + u32 p[PD_MAX_PAYLOAD]; + int rlen = 0; + int cmd_type; + int cmd; + int i; + + for (i = 0; i < cnt; i++) + p[i] = le32_to_cpu(payload[i]); + + cmd_type = PD_VDO_CMDT(p[0]); + cmd = PD_VDO_CMD(p[0]); + + tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d", + p[0], cmd_type, cmd, cnt); + + modep = &port->mode_data; + + adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX, + PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0])); + + pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX, + PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0])); + + switch (cmd_type) { + case CMDT_INIT: + switch (cmd) { + case CMD_DISCOVER_IDENT: + /* 6.4.4.3.1: Only respond as UFP (device) */ + if (port->data_role == TYPEC_DEVICE && + port->nr_snk_vdo) { + for (i = 0; i < port->nr_snk_vdo; i++) + response[i + 1] = port->snk_vdo[i]; + rlen = port->nr_snk_vdo + 1; + } + break; + case CMD_DISCOVER_SVID: + break; + case CMD_DISCOVER_MODES: + break; + case CMD_ENTER_MODE: + break; + case CMD_EXIT_MODE: + break; + case CMD_ATTENTION: + /* Attention command does not have response */ + typec_altmode_attention(adev, p[1]); + return 0; + default: + break; + } + if (rlen >= 1) { + response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK); + } else if (rlen == 0) { + response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK); + rlen = 1; + } else { + response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY); + rlen = 1; + } + break; + case CMDT_RSP_ACK: + /* silently drop message if we are not connected */ + if (IS_ERR_OR_NULL(port->partner)) + break; + + switch (cmd) { + case CMD_DISCOVER_IDENT: + /* 6.4.4.3.1 */ + svdm_consume_identity(port, payload, cnt); + response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID); + rlen = 1; + break; + case CMD_DISCOVER_SVID: + /* 6.4.4.3.2 */ + if (svdm_consume_svids(port, payload, cnt)) { + response[0] = VDO(USB_SID_PD, 1, + CMD_DISCOVER_SVID); + rlen = 1; + } else if (modep->nsvids && supports_modal(port)) { + response[0] = VDO(modep->svids[0], 1, + CMD_DISCOVER_MODES); + rlen = 1; + } + break; + case CMD_DISCOVER_MODES: + /* 6.4.4.3.3 */ + svdm_consume_modes(port, payload, cnt); + modep->svid_index++; + if (modep->svid_index < modep->nsvids) { + u16 svid = modep->svids[modep->svid_index]; + response[0] = VDO(svid, 1, CMD_DISCOVER_MODES); + rlen = 1; + } else { + tcpm_register_partner_altmodes(port); + } + break; + case CMD_ENTER_MODE: + typec_altmode_update_active(pdev, true); + + if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) { + response[0] = VDO(adev->svid, 1, CMD_EXIT_MODE); + response[0] |= VDO_OPOS(adev->mode); + return 1; + } + return 0; + case CMD_EXIT_MODE: + typec_altmode_update_active(pdev, false); + + /* Back to USB Operation */ + WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB, + NULL)); + break; + default: + break; + } + break; + case CMDT_RSP_NAK: + switch (cmd) { + case CMD_ENTER_MODE: + /* Back to USB Operation */ + WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB, + NULL)); + break; + default: + break; + } + break; + default: + break; + } + + /* Informing the alternate mode drivers about everything */ + typec_altmode_vdm(adev, p[0], &p[1], cnt); + + return rlen; +} + +static void tcpm_handle_vdm_request(struct tcpm_port *port, + const __le32 *payload, int cnt) +{ + int rlen = 0; + u32 response[8] = { }; + u32 p0 = le32_to_cpu(payload[0]); + + if (port->vdm_state == VDM_STATE_BUSY) { + /* If UFP responded busy retry after timeout */ + if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) { + port->vdm_state = VDM_STATE_WAIT_RSP_BUSY; + port->vdo_retry = (p0 & ~VDO_CMDT_MASK) | + CMDT_INIT; + mod_delayed_work(port->wq, &port->vdm_state_machine, + msecs_to_jiffies(PD_T_VDM_BUSY)); + return; + } + port->vdm_state = VDM_STATE_DONE; + } + + if (PD_VDO_SVDM(p0)) + rlen = tcpm_pd_svdm(port, payload, cnt, response); + + if (rlen > 0) { + tcpm_queue_vdm(port, response[0], &response[1], rlen - 1); + mod_delayed_work(port->wq, &port->vdm_state_machine, 0); + } +} + +static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd, + const u32 *data, int count) +{ + u32 header; + + if (WARN_ON(count > VDO_MAX_SIZE - 1)) + count = VDO_MAX_SIZE - 1; + + /* set VDM header with VID & CMD */ + header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ? + 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd); + tcpm_queue_vdm(port, header, data, count); + + mod_delayed_work(port->wq, &port->vdm_state_machine, 0); +} + +static unsigned int vdm_ready_timeout(u32 vdm_hdr) +{ + unsigned int timeout; + int cmd = PD_VDO_CMD(vdm_hdr); + + /* its not a structured VDM command */ + if (!PD_VDO_SVDM(vdm_hdr)) + return PD_T_VDM_UNSTRUCTURED; + + switch (PD_VDO_CMDT(vdm_hdr)) { + case CMDT_INIT: + if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE) + timeout = PD_T_VDM_WAIT_MODE_E; + else + timeout = PD_T_VDM_SNDR_RSP; + break; + default: + if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE) + timeout = PD_T_VDM_E_MODE; + else + timeout = PD_T_VDM_RCVR_RSP; + break; + } + return timeout; +} + +static void vdm_run_state_machine(struct tcpm_port *port) +{ + struct pd_message msg; + int i, res; + + switch (port->vdm_state) { + case VDM_STATE_READY: + /* Only transmit VDM if attached */ + if (!port->attached) { + port->vdm_state = VDM_STATE_ERR_BUSY; + break; + } + + /* + * if there's traffic or we're not in PDO ready state don't send + * a VDM. + */ + if (port->state != SRC_READY && port->state != SNK_READY) + break; + + /* Prepare and send VDM */ + memset(&msg, 0, sizeof(msg)); + msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, port->vdo_count); + for (i = 0; i < port->vdo_count; i++) + msg.payload[i] = cpu_to_le32(port->vdo_data[i]); + res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); + if (res < 0) { + port->vdm_state = VDM_STATE_ERR_SEND; + } else { + unsigned long timeout; + + port->vdm_retries = 0; + port->vdm_state = VDM_STATE_BUSY; + timeout = vdm_ready_timeout(port->vdo_data[0]); + mod_delayed_work(port->wq, &port->vdm_state_machine, + timeout); + } + break; + case VDM_STATE_WAIT_RSP_BUSY: + port->vdo_data[0] = port->vdo_retry; + port->vdo_count = 1; + port->vdm_state = VDM_STATE_READY; + break; + case VDM_STATE_BUSY: + port->vdm_state = VDM_STATE_ERR_TMOUT; + break; + case VDM_STATE_ERR_SEND: + /* + * A partner which does not support USB PD will not reply, + * so this is not a fatal error. At the same time, some + * devices may not return GoodCRC under some circumstances, + * so we need to retry. + */ + if (port->vdm_retries < 3) { + tcpm_log(port, "VDM Tx error, retry"); + port->vdm_retries++; + port->vdm_state = VDM_STATE_READY; + } + break; + default: + break; + } +} + +static void vdm_state_machine_work(struct work_struct *work) +{ + struct tcpm_port *port = container_of(work, struct tcpm_port, + vdm_state_machine.work); + enum vdm_states prev_state; + + mutex_lock(&port->lock); + + /* + * Continue running as long as the port is not busy and there was + * a state change. + */ + do { + prev_state = port->vdm_state; + vdm_run_state_machine(port); + } while (port->vdm_state != prev_state && + port->vdm_state != VDM_STATE_BUSY); + + mutex_unlock(&port->lock); +} + +enum pdo_err { + PDO_NO_ERR, + PDO_ERR_NO_VSAFE5V, + PDO_ERR_VSAFE5V_NOT_FIRST, + PDO_ERR_PDO_TYPE_NOT_IN_ORDER, + PDO_ERR_FIXED_NOT_SORTED, + PDO_ERR_VARIABLE_BATT_NOT_SORTED, + PDO_ERR_DUPE_PDO, + PDO_ERR_PPS_APDO_NOT_SORTED, + PDO_ERR_DUPE_PPS_APDO, +}; + +static const char * const pdo_err_msg[] = { + [PDO_ERR_NO_VSAFE5V] = + " err: source/sink caps should atleast have vSafe5V", + [PDO_ERR_VSAFE5V_NOT_FIRST] = + " err: vSafe5V Fixed Supply Object Shall always be the first object", + [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] = + " err: PDOs should be in the following order: Fixed; Battery; Variable", + [PDO_ERR_FIXED_NOT_SORTED] = + " err: Fixed supply pdos should be in increasing order of their fixed voltage", + [PDO_ERR_VARIABLE_BATT_NOT_SORTED] = + " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage", + [PDO_ERR_DUPE_PDO] = + " err: Variable/Batt supply pdos cannot have same min/max voltage", + [PDO_ERR_PPS_APDO_NOT_SORTED] = + " err: Programmable power supply apdos should be in increasing order of their maximum voltage", + [PDO_ERR_DUPE_PPS_APDO] = + " err: Programmable power supply apdos cannot have same min/max voltage and max current", +}; + +static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo, + unsigned int nr_pdo) +{ + unsigned int i; + + /* Should at least contain vSafe5v */ + if (nr_pdo < 1) + return PDO_ERR_NO_VSAFE5V; + + /* The vSafe5V Fixed Supply Object Shall always be the first object */ + if (pdo_type(pdo[0]) != PDO_TYPE_FIXED || + pdo_fixed_voltage(pdo[0]) != VSAFE5V) + return PDO_ERR_VSAFE5V_NOT_FIRST; + + for (i = 1; i < nr_pdo; i++) { + if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) { + return PDO_ERR_PDO_TYPE_NOT_IN_ORDER; + } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) { + enum pd_pdo_type type = pdo_type(pdo[i]); + + switch (type) { + /* + * The remaining Fixed Supply Objects, if + * present, shall be sent in voltage order; + * lowest to highest. + */ + case PDO_TYPE_FIXED: + if (pdo_fixed_voltage(pdo[i]) <= + pdo_fixed_voltage(pdo[i - 1])) + return PDO_ERR_FIXED_NOT_SORTED; + break; + /* + * The Battery Supply Objects and Variable + * supply, if present shall be sent in Minimum + * Voltage order; lowest to highest. + */ + case PDO_TYPE_VAR: + case PDO_TYPE_BATT: + if (pdo_min_voltage(pdo[i]) < + pdo_min_voltage(pdo[i - 1])) + return PDO_ERR_VARIABLE_BATT_NOT_SORTED; + else if ((pdo_min_voltage(pdo[i]) == + pdo_min_voltage(pdo[i - 1])) && + (pdo_max_voltage(pdo[i]) == + pdo_min_voltage(pdo[i - 1]))) + return PDO_ERR_DUPE_PDO; + break; + /* + * The Programmable Power Supply APDOs, if present, + * shall be sent in Maximum Voltage order; + * lowest to highest. + */ + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS) + break; + + if (pdo_pps_apdo_max_current(pdo[i]) < + pdo_pps_apdo_max_current(pdo[i - 1])) + return PDO_ERR_PPS_APDO_NOT_SORTED; + else if (pdo_pps_apdo_min_voltage(pdo[i]) == + pdo_pps_apdo_min_voltage(pdo[i - 1]) && + pdo_pps_apdo_max_voltage(pdo[i]) == + pdo_pps_apdo_max_voltage(pdo[i - 1]) && + pdo_pps_apdo_max_current(pdo[i]) == + pdo_pps_apdo_max_current(pdo[i - 1])) + return PDO_ERR_DUPE_PPS_APDO; + break; + default: + tcpm_log_force(port, " Unknown pdo type"); + } + } + } + + return PDO_NO_ERR; +} + +static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo, + unsigned int nr_pdo) +{ + enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo); + + if (err_index != PDO_NO_ERR) { + tcpm_log_force(port, " %s", pdo_err_msg[err_index]); + return -EINVAL; + } + + return 0; +} + +static int tcpm_altmode_enter(struct typec_altmode *altmode) +{ + struct tcpm_port *port = typec_altmode_get_drvdata(altmode); + u32 header; + + mutex_lock(&port->lock); + header = VDO(altmode->svid, 1, CMD_ENTER_MODE); + header |= VDO_OPOS(altmode->mode); + + tcpm_queue_vdm(port, header, NULL, 0); + mod_delayed_work(port->wq, &port->vdm_state_machine, 0); + mutex_unlock(&port->lock); + + return 0; +} + +static int tcpm_altmode_exit(struct typec_altmode *altmode) +{ + struct tcpm_port *port = typec_altmode_get_drvdata(altmode); + u32 header; + + mutex_lock(&port->lock); + header = VDO(altmode->svid, 1, CMD_EXIT_MODE); + header |= VDO_OPOS(altmode->mode); + + tcpm_queue_vdm(port, header, NULL, 0); + mod_delayed_work(port->wq, &port->vdm_state_machine, 0); + mutex_unlock(&port->lock); + + return 0; +} + +static int tcpm_altmode_vdm(struct typec_altmode *altmode, + u32 header, const u32 *data, int count) +{ + struct tcpm_port *port = typec_altmode_get_drvdata(altmode); + + mutex_lock(&port->lock); + tcpm_queue_vdm(port, header, data, count - 1); + mod_delayed_work(port->wq, &port->vdm_state_machine, 0); + mutex_unlock(&port->lock); + + return 0; +} + +static const struct typec_altmode_ops tcpm_altmode_ops = { + .enter = tcpm_altmode_enter, + .exit = tcpm_altmode_exit, + .vdm = tcpm_altmode_vdm, +}; + +/* + * PD (data, control) command handling functions + */ +static inline enum tcpm_state ready_state(struct tcpm_port *port) +{ + if (port->pwr_role == TYPEC_SOURCE) + return SRC_READY; + else + return SNK_READY; +} + +static int tcpm_pd_send_control(struct tcpm_port *port, + enum pd_ctrl_msg_type type); + +static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload, + int cnt) +{ + u32 p0 = le32_to_cpu(payload[0]); + unsigned int type = usb_pd_ado_type(p0); + + if (!type) { + tcpm_log(port, "Alert message received with no type"); + return; + } + + /* Just handling non-battery alerts for now */ + if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) { + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_set_state(port, GET_STATUS_SEND, 0); + break; + default: + tcpm_queue_message(port, PD_MSG_CTRL_WAIT); + break; + } + } +} + +static void tcpm_pd_data_request(struct tcpm_port *port, + const struct pd_message *msg) +{ + enum pd_data_msg_type type = pd_header_type_le(msg->header); + unsigned int cnt = pd_header_cnt_le(msg->header); + unsigned int rev = pd_header_rev_le(msg->header); + unsigned int i; + + switch (type) { + case PD_DATA_SOURCE_CAP: + if (port->pwr_role != TYPEC_SINK) + break; + + for (i = 0; i < cnt; i++) + port->source_caps[i] = le32_to_cpu(msg->payload[i]); + + port->nr_source_caps = cnt; + + tcpm_log_source_caps(port); + + tcpm_validate_caps(port, port->source_caps, + port->nr_source_caps); + + /* + * Adjust revision in subsequent message headers, as required, + * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't + * support Rev 1.0 so just do nothing in that scenario. + */ + if (rev == PD_REV10) + break; + + if (rev < PD_MAX_REV) + port->negotiated_rev = rev; + + /* + * This message may be received even if VBUS is not + * present. This is quite unexpected; see USB PD + * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2. + * However, at the same time, we must be ready to + * receive this message and respond to it 15ms after + * receiving PS_RDY during power swap operations, no matter + * if VBUS is available or not (USB PD specification, + * section 6.5.9.2). + * So we need to accept the message either way, + * but be prepared to keep waiting for VBUS after it was + * handled. + */ + tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); + break; + case PD_DATA_REQUEST: + if (port->pwr_role != TYPEC_SOURCE || + cnt != 1) { + tcpm_queue_message(port, PD_MSG_CTRL_REJECT); + break; + } + + /* + * Adjust revision in subsequent message headers, as required, + * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't + * support Rev 1.0 so just reject in that scenario. + */ + if (rev == PD_REV10) { + tcpm_queue_message(port, PD_MSG_CTRL_REJECT); + break; + } + + if (rev < PD_MAX_REV) + port->negotiated_rev = rev; + + port->sink_request = le32_to_cpu(msg->payload[0]); + tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0); + break; + case PD_DATA_SINK_CAP: + /* We don't do anything with this at the moment... */ + for (i = 0; i < cnt; i++) + port->sink_caps[i] = le32_to_cpu(msg->payload[i]); + port->nr_sink_caps = cnt; + break; + case PD_DATA_VENDOR_DEF: + tcpm_handle_vdm_request(port, msg->payload, cnt); + break; + case PD_DATA_BIST: + if (port->state == SRC_READY || port->state == SNK_READY) { + port->bist_request = le32_to_cpu(msg->payload[0]); + tcpm_set_state(port, BIST_RX, 0); + } + break; + case PD_DATA_ALERT: + tcpm_handle_alert(port, msg->payload, cnt); + break; + case PD_DATA_BATT_STATUS: + case PD_DATA_GET_COUNTRY_INFO: + /* Currently unsupported */ + tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); + break; + default: + tcpm_log(port, "Unhandled data message type %#x", type); + break; + } +} + +static void tcpm_pps_complete(struct tcpm_port *port, int result) +{ + if (port->pps_pending) { + port->pps_status = result; + port->pps_pending = false; + complete(&port->pps_complete); + } +} + +static void tcpm_pd_ctrl_request(struct tcpm_port *port, + const struct pd_message *msg) +{ + enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); + enum tcpm_state next_state; + + switch (type) { + case PD_CTRL_GOOD_CRC: + case PD_CTRL_PING: + break; + case PD_CTRL_GET_SOURCE_CAP: + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP); + break; + default: + tcpm_queue_message(port, PD_MSG_CTRL_REJECT); + break; + } + break; + case PD_CTRL_GET_SINK_CAP: + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP); + break; + default: + tcpm_queue_message(port, PD_MSG_CTRL_REJECT); + break; + } + break; + case PD_CTRL_GOTO_MIN: + break; + case PD_CTRL_PS_RDY: + switch (port->state) { + case SNK_TRANSITION_SINK: + if (port->vbus_present) { + tcpm_set_current_limit(port, + port->current_limit, + port->supply_voltage); + port->explicit_contract = true; + tcpm_set_state(port, SNK_READY, 0); + } else { + /* + * Seen after power swap. Keep waiting for VBUS + * in a transitional state. + */ + tcpm_set_state(port, + SNK_TRANSITION_SINK_VBUS, 0); + } + break; + case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: + tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0); + break; + case PR_SWAP_SNK_SRC_SINK_OFF: + tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0); + break; + case VCONN_SWAP_WAIT_FOR_VCONN: + tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0); + break; + default: + break; + } + break; + case PD_CTRL_REJECT: + case PD_CTRL_WAIT: + case PD_CTRL_NOT_SUPP: + switch (port->state) { + case SNK_NEGOTIATE_CAPABILITIES: + /* USB PD specification, Figure 8-43 */ + if (port->explicit_contract) + next_state = SNK_READY; + else + next_state = SNK_WAIT_CAPABILITIES; + tcpm_set_state(port, next_state, 0); + break; + case SNK_NEGOTIATE_PPS_CAPABILITIES: + /* Revert data back from any requested PPS updates */ + port->pps_data.out_volt = port->supply_voltage; + port->pps_data.op_curr = port->current_limit; + port->pps_status = (type == PD_CTRL_WAIT ? + -EAGAIN : -EOPNOTSUPP); + tcpm_set_state(port, SNK_READY, 0); + break; + case DR_SWAP_SEND: + port->swap_status = (type == PD_CTRL_WAIT ? + -EAGAIN : -EOPNOTSUPP); + tcpm_set_state(port, DR_SWAP_CANCEL, 0); + break; + case PR_SWAP_SEND: + port->swap_status = (type == PD_CTRL_WAIT ? + -EAGAIN : -EOPNOTSUPP); + tcpm_set_state(port, PR_SWAP_CANCEL, 0); + break; + case VCONN_SWAP_SEND: + port->swap_status = (type == PD_CTRL_WAIT ? + -EAGAIN : -EOPNOTSUPP); + tcpm_set_state(port, VCONN_SWAP_CANCEL, 0); + break; + default: + break; + } + break; + case PD_CTRL_ACCEPT: + switch (port->state) { + case SNK_NEGOTIATE_CAPABILITIES: + port->pps_data.active = false; + tcpm_set_state(port, SNK_TRANSITION_SINK, 0); + break; + case SNK_NEGOTIATE_PPS_CAPABILITIES: + port->pps_data.active = true; + port->supply_voltage = port->pps_data.out_volt; + port->current_limit = port->pps_data.op_curr; + tcpm_set_state(port, SNK_TRANSITION_SINK, 0); + break; + case SOFT_RESET_SEND: + port->message_id = 0; + port->rx_msgid = -1; + if (port->pwr_role == TYPEC_SOURCE) + next_state = SRC_SEND_CAPABILITIES; + else + next_state = SNK_WAIT_CAPABILITIES; + tcpm_set_state(port, next_state, 0); + break; + case DR_SWAP_SEND: + tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0); + break; + case PR_SWAP_SEND: + tcpm_set_state(port, PR_SWAP_START, 0); + break; + case VCONN_SWAP_SEND: + tcpm_set_state(port, VCONN_SWAP_START, 0); + break; + default: + break; + } + break; + case PD_CTRL_SOFT_RESET: + tcpm_set_state(port, SOFT_RESET, 0); + break; + case PD_CTRL_DR_SWAP: + if (port->port_type != TYPEC_PORT_DRP) { + tcpm_queue_message(port, PD_MSG_CTRL_REJECT); + break; + } + /* + * XXX + * 6.3.9: If an alternate mode is active, a request to swap + * alternate modes shall trigger a port reset. + */ + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_set_state(port, DR_SWAP_ACCEPT, 0); + break; + default: + tcpm_queue_message(port, PD_MSG_CTRL_WAIT); + break; + } + break; + case PD_CTRL_PR_SWAP: + if (port->port_type != TYPEC_PORT_DRP) { + tcpm_queue_message(port, PD_MSG_CTRL_REJECT); + break; + } + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_set_state(port, PR_SWAP_ACCEPT, 0); + break; + default: + tcpm_queue_message(port, PD_MSG_CTRL_WAIT); + break; + } + break; + case PD_CTRL_VCONN_SWAP: + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0); + break; + default: + tcpm_queue_message(port, PD_MSG_CTRL_WAIT); + break; + } + break; + case PD_CTRL_GET_SOURCE_CAP_EXT: + case PD_CTRL_GET_STATUS: + case PD_CTRL_FR_SWAP: + case PD_CTRL_GET_PPS_STATUS: + case PD_CTRL_GET_COUNTRY_CODES: + /* Currently not supported */ + tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); + break; + default: + tcpm_log(port, "Unhandled ctrl message type %#x", type); + break; + } +} + +static void tcpm_pd_ext_msg_request(struct tcpm_port *port, + const struct pd_message *msg) +{ + enum pd_ext_msg_type type = pd_header_type_le(msg->header); + unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header); + + if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) { + tcpm_log(port, "Unchunked extended messages unsupported"); + return; + } + + if (data_size > PD_EXT_MAX_CHUNK_DATA) { + tcpm_log(port, "Chunk handling not yet supported"); + return; + } + + switch (type) { + case PD_EXT_STATUS: + /* + * If PPS related events raised then get PPS status to clear + * (see USB PD 3.0 Spec, 6.5.2.4) + */ + if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] & + USB_PD_EXT_SDB_PPS_EVENTS) + tcpm_set_state(port, GET_PPS_STATUS_SEND, 0); + else + tcpm_set_state(port, ready_state(port), 0); + break; + case PD_EXT_PPS_STATUS: + /* + * For now the PPS status message is used to clear events + * and nothing more. + */ + tcpm_set_state(port, ready_state(port), 0); + break; + case PD_EXT_SOURCE_CAP_EXT: + case PD_EXT_GET_BATT_CAP: + case PD_EXT_GET_BATT_STATUS: + case PD_EXT_BATT_CAP: + case PD_EXT_GET_MANUFACTURER_INFO: + case PD_EXT_MANUFACTURER_INFO: + case PD_EXT_SECURITY_REQUEST: + case PD_EXT_SECURITY_RESPONSE: + case PD_EXT_FW_UPDATE_REQUEST: + case PD_EXT_FW_UPDATE_RESPONSE: + case PD_EXT_COUNTRY_INFO: + case PD_EXT_COUNTRY_CODES: + tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); + break; + default: + tcpm_log(port, "Unhandled extended message type %#x", type); + break; + } +} + +static void tcpm_pd_rx_handler(struct work_struct *work) +{ + struct pd_rx_event *event = container_of(work, + struct pd_rx_event, work); + const struct pd_message *msg = &event->msg; + unsigned int cnt = pd_header_cnt_le(msg->header); + struct tcpm_port *port = event->port; + + mutex_lock(&port->lock); + + tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header), + port->attached); + + if (port->attached) { + enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); + unsigned int msgid = pd_header_msgid_le(msg->header); + + /* + * USB PD standard, 6.6.1.2: + * "... if MessageID value in a received Message is the + * same as the stored value, the receiver shall return a + * GoodCRC Message with that MessageID value and drop + * the Message (this is a retry of an already received + * Message). Note: this shall not apply to the Soft_Reset + * Message which always has a MessageID value of zero." + */ + if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET) + goto done; + port->rx_msgid = msgid; + + /* + * If both ends believe to be DFP/host, we have a data role + * mismatch. + */ + if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) == + (port->data_role == TYPEC_HOST)) { + tcpm_log(port, + "Data role mismatch, initiating error recovery"); + tcpm_set_state(port, ERROR_RECOVERY, 0); + } else { + if (msg->header & PD_HEADER_EXT_HDR) + tcpm_pd_ext_msg_request(port, msg); + else if (cnt) + tcpm_pd_data_request(port, msg); + else + tcpm_pd_ctrl_request(port, msg); + } + } + +done: + mutex_unlock(&port->lock); + kfree(event); +} + +void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg) +{ + struct pd_rx_event *event; + + event = kzalloc(sizeof(*event), GFP_ATOMIC); + if (!event) + return; + + INIT_WORK(&event->work, tcpm_pd_rx_handler); + event->port = port; + memcpy(&event->msg, msg, sizeof(*msg)); + queue_work(port->wq, &event->work); +} +EXPORT_SYMBOL_GPL(tcpm_pd_receive); + +static int tcpm_pd_send_control(struct tcpm_port *port, + enum pd_ctrl_msg_type type) +{ + struct pd_message msg; + + memset(&msg, 0, sizeof(msg)); + msg.header = PD_HEADER_LE(type, port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 0); + + return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); +} + +/* + * Send queued message without affecting state. + * Return true if state machine should go back to sleep, + * false otherwise. + */ +static bool tcpm_send_queued_message(struct tcpm_port *port) +{ + enum pd_msg_request queued_message; + + do { + queued_message = port->queued_message; + port->queued_message = PD_MSG_NONE; + + switch (queued_message) { + case PD_MSG_CTRL_WAIT: + tcpm_pd_send_control(port, PD_CTRL_WAIT); + break; + case PD_MSG_CTRL_REJECT: + tcpm_pd_send_control(port, PD_CTRL_REJECT); + break; + case PD_MSG_CTRL_NOT_SUPP: + tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP); + break; + case PD_MSG_DATA_SINK_CAP: + tcpm_pd_send_sink_caps(port); + break; + case PD_MSG_DATA_SOURCE_CAP: + tcpm_pd_send_source_caps(port); + break; + default: + break; + } + } while (port->queued_message != PD_MSG_NONE); + + if (port->delayed_state != INVALID_STATE) { + if (time_is_after_jiffies(port->delayed_runtime)) { + mod_delayed_work(port->wq, &port->state_machine, + port->delayed_runtime - jiffies); + return true; + } + port->delayed_state = INVALID_STATE; + } + return false; +} + +static int tcpm_pd_check_request(struct tcpm_port *port) +{ + u32 pdo, rdo = port->sink_request; + unsigned int max, op, pdo_max, index; + enum pd_pdo_type type; + + index = rdo_index(rdo); + if (!index || index > port->nr_src_pdo) + return -EINVAL; + + pdo = port->src_pdo[index - 1]; + type = pdo_type(pdo); + switch (type) { + case PDO_TYPE_FIXED: + case PDO_TYPE_VAR: + max = rdo_max_current(rdo); + op = rdo_op_current(rdo); + pdo_max = pdo_max_current(pdo); + + if (op > pdo_max) + return -EINVAL; + if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) + return -EINVAL; + + if (type == PDO_TYPE_FIXED) + tcpm_log(port, + "Requested %u mV, %u mA for %u / %u mA", + pdo_fixed_voltage(pdo), pdo_max, op, max); + else + tcpm_log(port, + "Requested %u -> %u mV, %u mA for %u / %u mA", + pdo_min_voltage(pdo), pdo_max_voltage(pdo), + pdo_max, op, max); + break; + case PDO_TYPE_BATT: + max = rdo_max_power(rdo); + op = rdo_op_power(rdo); + pdo_max = pdo_max_power(pdo); + + if (op > pdo_max) + return -EINVAL; + if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) + return -EINVAL; + tcpm_log(port, + "Requested %u -> %u mV, %u mW for %u / %u mW", + pdo_min_voltage(pdo), pdo_max_voltage(pdo), + pdo_max, op, max); + break; + default: + return -EINVAL; + } + + port->op_vsafe5v = index == 1; + + return 0; +} + +#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y)) +#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y)) + +static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, + int *src_pdo) +{ + unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0, + max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0, + min_snk_mv = 0; + int ret = -EINVAL; + + port->pps_data.supported = false; + port->usb_type = POWER_SUPPLY_USB_TYPE_PD; + + /* + * Select the source PDO providing the most power which has a + * matchig sink cap. + */ + for (i = 0; i < port->nr_source_caps; i++) { + u32 pdo = port->source_caps[i]; + enum pd_pdo_type type = pdo_type(pdo); + + switch (type) { + case PDO_TYPE_FIXED: + max_src_mv = pdo_fixed_voltage(pdo); + min_src_mv = max_src_mv; + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: + max_src_mv = pdo_max_voltage(pdo); + min_src_mv = pdo_min_voltage(pdo); + break; + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) { + port->pps_data.supported = true; + port->usb_type = + POWER_SUPPLY_USB_TYPE_PD_PPS; + } + continue; + default: + tcpm_log(port, "Invalid source PDO type, ignoring"); + continue; + } + + switch (type) { + case PDO_TYPE_FIXED: + case PDO_TYPE_VAR: + src_ma = pdo_max_current(pdo); + src_mw = src_ma * min_src_mv / 1000; + break; + case PDO_TYPE_BATT: + src_mw = pdo_max_power(pdo); + break; + case PDO_TYPE_APDO: + continue; + default: + tcpm_log(port, "Invalid source PDO type, ignoring"); + continue; + } + + for (j = 0; j < port->nr_snk_pdo; j++) { + pdo = port->snk_pdo[j]; + + switch (pdo_type(pdo)) { + case PDO_TYPE_FIXED: + max_snk_mv = pdo_fixed_voltage(pdo); + min_snk_mv = max_snk_mv; + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: + max_snk_mv = pdo_max_voltage(pdo); + min_snk_mv = pdo_min_voltage(pdo); + break; + case PDO_TYPE_APDO: + continue; + default: + tcpm_log(port, "Invalid sink PDO type, ignoring"); + continue; + } + + if (max_src_mv <= max_snk_mv && + min_src_mv >= min_snk_mv) { + /* Prefer higher voltages if available */ + if ((src_mw == max_mw && min_src_mv > max_mv) || + src_mw > max_mw) { + *src_pdo = i; + *sink_pdo = j; + max_mw = src_mw; + max_mv = min_src_mv; + ret = 0; + } + } + } + } + + return ret; +} + +#define min_pps_apdo_current(x, y) \ + min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y)) + +static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port) +{ + unsigned int i, j, max_mw = 0, max_mv = 0; + unsigned int min_src_mv, max_src_mv, src_ma, src_mw; + unsigned int min_snk_mv, max_snk_mv, snk_ma; + u32 pdo; + unsigned int src_pdo = 0, snk_pdo = 0; + + /* + * Select the source PPS APDO providing the most power while staying + * within the board's limits. We skip the first PDO as this is always + * 5V 3A. + */ + for (i = 1; i < port->nr_source_caps; ++i) { + pdo = port->source_caps[i]; + + switch (pdo_type(pdo)) { + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { + tcpm_log(port, "Not PPS APDO (source), ignoring"); + continue; + } + + min_src_mv = pdo_pps_apdo_min_voltage(pdo); + max_src_mv = pdo_pps_apdo_max_voltage(pdo); + src_ma = pdo_pps_apdo_max_current(pdo); + src_mw = (src_ma * max_src_mv) / 1000; + + /* + * Now search through the sink PDOs to find a matching + * PPS APDO. Again skip the first sink PDO as this will + * always be 5V 3A. + */ + for (j = 1; j < port->nr_snk_pdo; j++) { + pdo = port->snk_pdo[j]; + + switch (pdo_type(pdo)) { + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { + tcpm_log(port, + "Not PPS APDO (sink), ignoring"); + continue; + } + + min_snk_mv = + pdo_pps_apdo_min_voltage(pdo); + max_snk_mv = + pdo_pps_apdo_max_voltage(pdo); + snk_ma = + pdo_pps_apdo_max_current(pdo); + break; + default: + tcpm_log(port, + "Not APDO type (sink), ignoring"); + continue; + } + + if (max_src_mv <= max_snk_mv && + min_src_mv >= min_snk_mv) { + /* Prefer higher voltages if available */ + if ((src_mw == max_mw && + min_src_mv > max_mv) || + src_mw > max_mw) { + src_pdo = i; + snk_pdo = j; + max_mw = src_mw; + max_mv = max_src_mv; + } + } + } + + break; + default: + tcpm_log(port, "Not APDO type (source), ignoring"); + continue; + } + } + + if (src_pdo) { + pdo = port->source_caps[src_pdo]; + + port->pps_data.min_volt = pdo_pps_apdo_min_voltage(pdo); + port->pps_data.max_volt = pdo_pps_apdo_max_voltage(pdo); + port->pps_data.max_curr = + min_pps_apdo_current(pdo, port->snk_pdo[snk_pdo]); + port->pps_data.out_volt = + min(pdo_pps_apdo_max_voltage(pdo), port->pps_data.out_volt); + port->pps_data.op_curr = + min(port->pps_data.max_curr, port->pps_data.op_curr); + } + + return src_pdo; +} + +static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) +{ + unsigned int mv, ma, mw, flags; + unsigned int max_ma, max_mw; + enum pd_pdo_type type; + u32 pdo, matching_snk_pdo; + int src_pdo_index = 0; + int snk_pdo_index = 0; + int ret; + + ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index); + if (ret < 0) + return ret; + + pdo = port->source_caps[src_pdo_index]; + matching_snk_pdo = port->snk_pdo[snk_pdo_index]; + type = pdo_type(pdo); + + switch (type) { + case PDO_TYPE_FIXED: + mv = pdo_fixed_voltage(pdo); + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: + mv = pdo_min_voltage(pdo); + break; + default: + tcpm_log(port, "Invalid PDO selected!"); + return -EINVAL; + } + + /* Select maximum available current within the sink pdo's limit */ + if (type == PDO_TYPE_BATT) { + mw = min_power(pdo, matching_snk_pdo); + ma = 1000 * mw / mv; + } else { + ma = min_current(pdo, matching_snk_pdo); + mw = ma * mv / 1000; + } + + flags = RDO_USB_COMM | RDO_NO_SUSPEND; + + /* Set mismatch bit if offered power is less than operating power */ + max_ma = ma; + max_mw = mw; + if (mw < port->operating_snk_mw) { + flags |= RDO_CAP_MISMATCH; + if (type == PDO_TYPE_BATT && + (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo))) + max_mw = pdo_max_power(matching_snk_pdo); + else if (pdo_max_current(matching_snk_pdo) > + pdo_max_current(pdo)) + max_ma = pdo_max_current(matching_snk_pdo); + } + + tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", + port->cc_req, port->cc1, port->cc2, port->vbus_source, + port->vconn_role == TYPEC_SOURCE ? "source" : "sink", + port->polarity); + + if (type == PDO_TYPE_BATT) { + *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags); + + tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s", + src_pdo_index, mv, mw, + flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); + } else { + *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags); + + tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s", + src_pdo_index, mv, ma, + flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); + } + + port->current_limit = ma; + port->supply_voltage = mv; + + return 0; +} + +static int tcpm_pd_send_request(struct tcpm_port *port) +{ + struct pd_message msg; + int ret; + u32 rdo; + + ret = tcpm_pd_build_request(port, &rdo); + if (ret < 0) + return ret; + + memset(&msg, 0, sizeof(msg)); + msg.header = PD_HEADER_LE(PD_DATA_REQUEST, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 1); + msg.payload[0] = cpu_to_le32(rdo); + + return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); +} + +static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo) +{ + unsigned int out_mv, op_ma, op_mw, min_mv, max_mv, max_ma, flags; + enum pd_pdo_type type; + unsigned int src_pdo_index; + u32 pdo; + + src_pdo_index = tcpm_pd_select_pps_apdo(port); + if (!src_pdo_index) + return -EOPNOTSUPP; + + pdo = port->source_caps[src_pdo_index]; + type = pdo_type(pdo); + + switch (type) { + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { + tcpm_log(port, "Invalid APDO selected!"); + return -EINVAL; + } + min_mv = port->pps_data.min_volt; + max_mv = port->pps_data.max_volt; + max_ma = port->pps_data.max_curr; + out_mv = port->pps_data.out_volt; + op_ma = port->pps_data.op_curr; + break; + default: + tcpm_log(port, "Invalid PDO selected!"); + return -EINVAL; + } + + flags = RDO_USB_COMM | RDO_NO_SUSPEND; + + op_mw = (op_ma * out_mv) / 1000; + if (op_mw < port->operating_snk_mw) { + /* + * Try raising current to meet power needs. If that's not enough + * then try upping the voltage. If that's still not enough + * then we've obviously chosen a PPS APDO which really isn't + * suitable so abandon ship. + */ + op_ma = (port->operating_snk_mw * 1000) / out_mv; + if ((port->operating_snk_mw * 1000) % out_mv) + ++op_ma; + op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP); + + if (op_ma > max_ma) { + op_ma = max_ma; + out_mv = (port->operating_snk_mw * 1000) / op_ma; + if ((port->operating_snk_mw * 1000) % op_ma) + ++out_mv; + out_mv += RDO_PROG_VOLT_MV_STEP - + (out_mv % RDO_PROG_VOLT_MV_STEP); + + if (out_mv > max_mv) { + tcpm_log(port, "Invalid PPS APDO selected!"); + return -EINVAL; + } + } + } + + tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", + port->cc_req, port->cc1, port->cc2, port->vbus_source, + port->vconn_role == TYPEC_SOURCE ? "source" : "sink", + port->polarity); + + *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags); + + tcpm_log(port, "Requesting APDO %d: %u mV, %u mA", + src_pdo_index, out_mv, op_ma); + + port->pps_data.op_curr = op_ma; + port->pps_data.out_volt = out_mv; + + return 0; +} + +static int tcpm_pd_send_pps_request(struct tcpm_port *port) +{ + struct pd_message msg; + int ret; + u32 rdo; + + ret = tcpm_pd_build_pps_request(port, &rdo); + if (ret < 0) + return ret; + + memset(&msg, 0, sizeof(msg)); + msg.header = PD_HEADER_LE(PD_DATA_REQUEST, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 1); + msg.payload[0] = cpu_to_le32(rdo); + + return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); +} + +static int tcpm_set_vbus(struct tcpm_port *port, bool enable) +{ + int ret; + + if (enable && port->vbus_charge) + return -EINVAL; + + tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge); + + ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge); + if (ret < 0) + return ret; + + port->vbus_source = enable; + return 0; +} + +static int tcpm_set_charge(struct tcpm_port *port, bool charge) +{ + int ret; + + if (charge && port->vbus_source) + return -EINVAL; + + if (charge != port->vbus_charge) { + tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge); + ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source, + charge); + if (ret < 0) + return ret; + } + port->vbus_charge = charge; + return 0; +} + +static bool tcpm_start_drp_toggling(struct tcpm_port *port, + enum typec_cc_status cc) +{ + int ret; + + if (port->tcpc->start_drp_toggling && + port->port_type == TYPEC_PORT_DRP) { + tcpm_log_force(port, "Start DRP toggling"); + ret = port->tcpc->start_drp_toggling(port->tcpc, cc); + if (!ret) + return true; + } + + return false; +} + +static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc) +{ + tcpm_log(port, "cc:=%d", cc); + port->cc_req = cc; + port->tcpc->set_cc(port->tcpc, cc); +} + +static int tcpm_init_vbus(struct tcpm_port *port) +{ + int ret; + + ret = port->tcpc->set_vbus(port->tcpc, false, false); + port->vbus_source = false; + port->vbus_charge = false; + return ret; +} + +static int tcpm_init_vconn(struct tcpm_port *port) +{ + int ret; + + ret = port->tcpc->set_vconn(port->tcpc, false); + port->vconn_role = TYPEC_SINK; + return ret; +} + +static void tcpm_typec_connect(struct tcpm_port *port) +{ + if (!port->connected) { + /* Make sure we don't report stale identity information */ + memset(&port->partner_ident, 0, sizeof(port->partner_ident)); + port->partner_desc.usb_pd = port->pd_capable; + if (tcpm_port_is_debug(port)) + port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG; + else if (tcpm_port_is_audio(port)) + port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO; + else + port->partner_desc.accessory = TYPEC_ACCESSORY_NONE; + port->partner = typec_register_partner(port->typec_port, + &port->partner_desc); + port->connected = true; + } +} + +static int tcpm_src_attach(struct tcpm_port *port) +{ + enum typec_cc_polarity polarity = + port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2 + : TYPEC_POLARITY_CC1; + int ret; + + if (port->attached) + return 0; + + ret = tcpm_set_polarity(port, polarity); + if (ret < 0) + return ret; + + ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST); + if (ret < 0) + return ret; + + ret = port->tcpc->set_pd_rx(port->tcpc, true); + if (ret < 0) + goto out_disable_mux; + + /* + * USB Type-C specification, version 1.2, + * chapter 4.5.2.2.8.1 (Attached.SRC Requirements) + * Enable VCONN only if the non-RD port is set to RA. + */ + if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) || + (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) { + ret = tcpm_set_vconn(port, true); + if (ret < 0) + goto out_disable_pd; + } + + ret = tcpm_set_vbus(port, true); + if (ret < 0) + goto out_disable_vconn; + + port->pd_capable = false; + + port->partner = NULL; + + port->attached = true; + port->send_discover = true; + + return 0; + +out_disable_vconn: + tcpm_set_vconn(port, false); +out_disable_pd: + port->tcpc->set_pd_rx(port->tcpc, false); +out_disable_mux: + tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, + TYPEC_ORIENTATION_NONE); + return ret; +} + +static void tcpm_typec_disconnect(struct tcpm_port *port) +{ + if (port->connected) { + typec_unregister_partner(port->partner); + port->partner = NULL; + port->connected = false; + } +} + +static void tcpm_unregister_altmodes(struct tcpm_port *port) +{ + struct pd_mode_data *modep = &port->mode_data; + int i; + + for (i = 0; i < modep->altmodes; i++) { + typec_unregister_altmode(port->partner_altmode[i]); + port->partner_altmode[i] = NULL; + } + + memset(modep, 0, sizeof(*modep)); +} + +static void tcpm_reset_port(struct tcpm_port *port) +{ + tcpm_unregister_altmodes(port); + tcpm_typec_disconnect(port); + port->attached = false; + port->pd_capable = false; + port->pps_data.supported = false; + + /* + * First Rx ID should be 0; set this to a sentinel of -1 so that + * we can check tcpm_pd_rx_handler() if we had seen it before. + */ + port->rx_msgid = -1; + + port->tcpc->set_pd_rx(port->tcpc, false); + tcpm_init_vbus(port); /* also disables charging */ + tcpm_init_vconn(port); + tcpm_set_current_limit(port, 0, 0); + tcpm_set_polarity(port, TYPEC_POLARITY_CC1); + tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, + TYPEC_ORIENTATION_NONE); + tcpm_set_attached_state(port, false); + port->try_src_count = 0; + port->try_snk_count = 0; + port->usb_type = POWER_SUPPLY_USB_TYPE_C; + + power_supply_changed(port->psy); +} + +static void tcpm_detach(struct tcpm_port *port) +{ + if (!port->attached) + return; + + if (tcpm_port_is_disconnected(port)) + port->hard_reset_count = 0; + + tcpm_reset_port(port); +} + +static void tcpm_src_detach(struct tcpm_port *port) +{ + tcpm_detach(port); +} + +static int tcpm_snk_attach(struct tcpm_port *port) +{ + int ret; + + if (port->attached) + return 0; + + ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ? + TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1); + if (ret < 0) + return ret; + + ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE); + if (ret < 0) + return ret; + + port->pd_capable = false; + + port->partner = NULL; + + port->attached = true; + port->send_discover = true; + + return 0; +} + +static void tcpm_snk_detach(struct tcpm_port *port) +{ + tcpm_detach(port); +} + +static int tcpm_acc_attach(struct tcpm_port *port) +{ + int ret; + + if (port->attached) + return 0; + + ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST); + if (ret < 0) + return ret; + + port->partner = NULL; + + tcpm_typec_connect(port); + + port->attached = true; + + return 0; +} + +static void tcpm_acc_detach(struct tcpm_port *port) +{ + tcpm_detach(port); +} + +static inline enum tcpm_state hard_reset_state(struct tcpm_port *port) +{ + if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) + return HARD_RESET_SEND; + if (port->pd_capable) + return ERROR_RECOVERY; + if (port->pwr_role == TYPEC_SOURCE) + return SRC_UNATTACHED; + if (port->state == SNK_WAIT_CAPABILITIES) + return SNK_READY; + return SNK_UNATTACHED; +} + +static inline enum tcpm_state unattached_state(struct tcpm_port *port) +{ + if (port->port_type == TYPEC_PORT_DRP) { + if (port->pwr_role == TYPEC_SOURCE) + return SRC_UNATTACHED; + else + return SNK_UNATTACHED; + } else if (port->port_type == TYPEC_PORT_SRC) { + return SRC_UNATTACHED; + } + + return SNK_UNATTACHED; +} + +static void tcpm_check_send_discover(struct tcpm_port *port) +{ + if (port->data_role == TYPEC_HOST && port->send_discover && + port->pd_capable) { + tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0); + port->send_discover = false; + } +} + +static void tcpm_swap_complete(struct tcpm_port *port, int result) +{ + if (port->swap_pending) { + port->swap_status = result; + port->swap_pending = false; + port->non_pd_role_swap = false; + complete(&port->swap_complete); + } +} + +static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc) +{ + switch (cc) { + case TYPEC_CC_RP_1_5: + return TYPEC_PWR_MODE_1_5A; + case TYPEC_CC_RP_3_0: + return TYPEC_PWR_MODE_3_0A; + case TYPEC_CC_RP_DEF: + default: + return TYPEC_PWR_MODE_USB; + } +} + +static void run_state_machine(struct tcpm_port *port) +{ + int ret; + enum typec_pwr_opmode opmode; + unsigned int msecs; + + port->enter_state = port->state; + switch (port->state) { + case DRP_TOGGLING: + break; + /* SRC states */ + case SRC_UNATTACHED: + if (!port->non_pd_role_swap) + tcpm_swap_complete(port, -ENOTCONN); + tcpm_src_detach(port); + if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) { + tcpm_set_state(port, DRP_TOGGLING, 0); + break; + } + tcpm_set_cc(port, tcpm_rp_cc(port)); + if (port->port_type == TYPEC_PORT_DRP) + tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK); + break; + case SRC_ATTACH_WAIT: + if (tcpm_port_is_debug(port)) + tcpm_set_state(port, DEBUG_ACC_ATTACHED, + PD_T_CC_DEBOUNCE); + else if (tcpm_port_is_audio(port)) + tcpm_set_state(port, AUDIO_ACC_ATTACHED, + PD_T_CC_DEBOUNCE); + else if (tcpm_port_is_source(port)) + tcpm_set_state(port, + tcpm_try_snk(port) ? SNK_TRY + : SRC_ATTACHED, + PD_T_CC_DEBOUNCE); + break; + + case SNK_TRY: + port->try_snk_count++; + /* + * Requirements: + * - Do not drive vconn or vbus + * - Terminate CC pins (both) to Rd + * Action: + * - Wait for tDRPTry (PD_T_DRP_TRY). + * Until then, ignore any state changes. + */ + tcpm_set_cc(port, TYPEC_CC_RD); + tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY); + break; + case SNK_TRY_WAIT: + if (tcpm_port_is_sink(port)) { + tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0); + } else { + tcpm_set_state(port, SRC_TRYWAIT, 0); + port->max_wait = 0; + } + break; + case SNK_TRY_WAIT_DEBOUNCE: + tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS, + PD_T_PD_DEBOUNCE); + break; + case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS: + if (port->vbus_present && tcpm_port_is_sink(port)) { + tcpm_set_state(port, SNK_ATTACHED, 0); + } else { + tcpm_set_state(port, SRC_TRYWAIT, 0); + port->max_wait = 0; + } + break; + case SRC_TRYWAIT: + tcpm_set_cc(port, tcpm_rp_cc(port)); + if (port->max_wait == 0) { + port->max_wait = jiffies + + msecs_to_jiffies(PD_T_DRP_TRY); + tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, + PD_T_DRP_TRY); + } else { + if (time_is_after_jiffies(port->max_wait)) + tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, + jiffies_to_msecs(port->max_wait - + jiffies)); + else + tcpm_set_state(port, SNK_UNATTACHED, 0); + } + break; + case SRC_TRYWAIT_DEBOUNCE: + tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE); + break; + case SRC_TRYWAIT_UNATTACHED: + tcpm_set_state(port, SNK_UNATTACHED, 0); + break; + + case SRC_ATTACHED: + ret = tcpm_src_attach(port); + tcpm_set_state(port, SRC_UNATTACHED, + ret < 0 ? 0 : PD_T_PS_SOURCE_ON); + break; + case SRC_STARTUP: + opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port)); + typec_set_pwr_opmode(port->typec_port, opmode); + port->pwr_opmode = TYPEC_PWR_MODE_USB; + port->caps_count = 0; + port->negotiated_rev = PD_MAX_REV; + port->message_id = 0; + port->rx_msgid = -1; + port->explicit_contract = false; + tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); + break; + case SRC_SEND_CAPABILITIES: + port->caps_count++; + if (port->caps_count > PD_N_CAPS_COUNT) { + tcpm_set_state(port, SRC_READY, 0); + break; + } + ret = tcpm_pd_send_source_caps(port); + if (ret < 0) { + tcpm_set_state(port, SRC_SEND_CAPABILITIES, + PD_T_SEND_SOURCE_CAP); + } else { + /* + * Per standard, we should clear the reset counter here. + * However, that can result in state machine hang-ups. + * Reset it only in READY state to improve stability. + */ + /* port->hard_reset_count = 0; */ + port->caps_count = 0; + port->pd_capable = true; + tcpm_set_state_cond(port, hard_reset_state(port), + PD_T_SEND_SOURCE_CAP); + } + break; + case SRC_NEGOTIATE_CAPABILITIES: + ret = tcpm_pd_check_request(port); + if (ret < 0) { + tcpm_pd_send_control(port, PD_CTRL_REJECT); + if (!port->explicit_contract) { + tcpm_set_state(port, + SRC_WAIT_NEW_CAPABILITIES, 0); + } else { + tcpm_set_state(port, SRC_READY, 0); + } + } else { + tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_set_state(port, SRC_TRANSITION_SUPPLY, + PD_T_SRC_TRANSITION); + } + break; + case SRC_TRANSITION_SUPPLY: + /* XXX: regulator_set_voltage(vbus, ...) */ + tcpm_pd_send_control(port, PD_CTRL_PS_RDY); + port->explicit_contract = true; + typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD); + port->pwr_opmode = TYPEC_PWR_MODE_PD; + tcpm_set_state_cond(port, SRC_READY, 0); + break; + case SRC_READY: +#if 1 + port->hard_reset_count = 0; +#endif + port->try_src_count = 0; + + tcpm_swap_complete(port, 0); + tcpm_typec_connect(port); + + tcpm_check_send_discover(port); + /* + * 6.3.5 + * Sending ping messages is not necessary if + * - the source operates at vSafe5V + * or + * - The system is not operating in PD mode + * or + * - Both partners are connected using a Type-C connector + * + * There is no actual need to send PD messages since the local + * port type-c and the spec does not clearly say whether PD is + * possible when type-c is connected to Type-A/B + */ + break; + case SRC_WAIT_NEW_CAPABILITIES: + /* Nothing to do... */ + break; + + /* SNK states */ + case SNK_UNATTACHED: + if (!port->non_pd_role_swap) + tcpm_swap_complete(port, -ENOTCONN); + tcpm_pps_complete(port, -ENOTCONN); + tcpm_snk_detach(port); + if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) { + tcpm_set_state(port, DRP_TOGGLING, 0); + break; + } + tcpm_set_cc(port, TYPEC_CC_RD); + if (port->port_type == TYPEC_PORT_DRP) + tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC); + break; + case SNK_ATTACH_WAIT: + if ((port->cc1 == TYPEC_CC_OPEN && + port->cc2 != TYPEC_CC_OPEN) || + (port->cc1 != TYPEC_CC_OPEN && + port->cc2 == TYPEC_CC_OPEN)) + tcpm_set_state(port, SNK_DEBOUNCED, + PD_T_CC_DEBOUNCE); + else if (tcpm_port_is_disconnected(port)) + tcpm_set_state(port, SNK_UNATTACHED, + PD_T_PD_DEBOUNCE); + break; + case SNK_DEBOUNCED: + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(port, SNK_UNATTACHED, + PD_T_PD_DEBOUNCE); + else if (port->vbus_present) + tcpm_set_state(port, + tcpm_try_src(port) ? SRC_TRY + : SNK_ATTACHED, + 0); + else + /* Wait for VBUS, but not forever */ + tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON); + break; + + case SRC_TRY: + port->try_src_count++; + tcpm_set_cc(port, tcpm_rp_cc(port)); + port->max_wait = 0; + tcpm_set_state(port, SRC_TRY_WAIT, 0); + break; + case SRC_TRY_WAIT: + if (port->max_wait == 0) { + port->max_wait = jiffies + + msecs_to_jiffies(PD_T_DRP_TRY); + msecs = PD_T_DRP_TRY; + } else { + if (time_is_after_jiffies(port->max_wait)) + msecs = jiffies_to_msecs(port->max_wait - + jiffies); + else + msecs = 0; + } + tcpm_set_state(port, SNK_TRYWAIT, msecs); + break; + case SRC_TRY_DEBOUNCE: + tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE); + break; + case SNK_TRYWAIT: + tcpm_set_cc(port, TYPEC_CC_RD); + tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE); + break; + case SNK_TRYWAIT_VBUS: + /* + * TCPM stays in this state indefinitely until VBUS + * is detected as long as Rp is not detected for + * more than a time period of tPDDebounce. + */ + if (port->vbus_present && tcpm_port_is_sink(port)) { + tcpm_set_state(port, SNK_ATTACHED, 0); + break; + } + if (!tcpm_port_is_sink(port)) + tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0); + break; + case SNK_TRYWAIT_DEBOUNCE: + tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); + break; + case SNK_ATTACHED: + ret = tcpm_snk_attach(port); + if (ret < 0) + tcpm_set_state(port, SNK_UNATTACHED, 0); + else + tcpm_set_state(port, SNK_STARTUP, 0); + break; + case SNK_STARTUP: + opmode = tcpm_get_pwr_opmode(port->polarity ? + port->cc2 : port->cc1); + typec_set_pwr_opmode(port->typec_port, opmode); + port->pwr_opmode = TYPEC_PWR_MODE_USB; + port->negotiated_rev = PD_MAX_REV; + port->message_id = 0; + port->rx_msgid = -1; + port->explicit_contract = false; + tcpm_set_state(port, SNK_DISCOVERY, 0); + break; + case SNK_DISCOVERY: + if (port->vbus_present) { + tcpm_set_current_limit(port, + tcpm_get_current_limit(port), + 5000); + tcpm_set_charge(port, true); + tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); + break; + } + /* + * For DRP, timeouts differ. Also, handling is supposed to be + * different and much more complex (dead battery detection; + * see USB power delivery specification, section 8.3.3.6.1.5.1). + */ + tcpm_set_state(port, hard_reset_state(port), + port->port_type == TYPEC_PORT_DRP ? + PD_T_DB_DETECT : PD_T_NO_RESPONSE); + break; + case SNK_DISCOVERY_DEBOUNCE: + tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE, + PD_T_CC_DEBOUNCE); + break; + case SNK_DISCOVERY_DEBOUNCE_DONE: + if (!tcpm_port_is_disconnected(port) && + tcpm_port_is_sink(port) && + time_is_after_jiffies(port->delayed_runtime)) { + tcpm_set_state(port, SNK_DISCOVERY, + jiffies_to_msecs(port->delayed_runtime - + jiffies)); + break; + } + tcpm_set_state(port, unattached_state(port), 0); + break; + case SNK_WAIT_CAPABILITIES: + ret = port->tcpc->set_pd_rx(port->tcpc, true); + if (ret < 0) { + tcpm_set_state(port, SNK_READY, 0); + break; + } + /* + * If VBUS has never been low, and we time out waiting + * for source cap, try a soft reset first, in case we + * were already in a stable contract before this boot. + * Do this only once. + */ + if (port->vbus_never_low) { + port->vbus_never_low = false; + tcpm_set_state(port, SOFT_RESET_SEND, + PD_T_SINK_WAIT_CAP); + } else { + tcpm_set_state(port, hard_reset_state(port), + PD_T_SINK_WAIT_CAP); + } + break; + case SNK_NEGOTIATE_CAPABILITIES: + port->pd_capable = true; + port->hard_reset_count = 0; + ret = tcpm_pd_send_request(port); + if (ret < 0) { + /* Let the Source send capabilities again. */ + tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); + } else { + tcpm_set_state_cond(port, hard_reset_state(port), + PD_T_SENDER_RESPONSE); + } + break; + case SNK_NEGOTIATE_PPS_CAPABILITIES: + ret = tcpm_pd_send_pps_request(port); + if (ret < 0) { + port->pps_status = ret; + /* + * If this was called due to updates to sink + * capabilities, and pps is no longer valid, we should + * safely fall back to a standard PDO. + */ + if (port->update_sink_caps) + tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); + else + tcpm_set_state(port, SNK_READY, 0); + } else { + tcpm_set_state_cond(port, hard_reset_state(port), + PD_T_SENDER_RESPONSE); + } + break; + case SNK_TRANSITION_SINK: + case SNK_TRANSITION_SINK_VBUS: + tcpm_set_state(port, hard_reset_state(port), + PD_T_PS_TRANSITION); + break; + case SNK_READY: + port->try_snk_count = 0; + port->update_sink_caps = false; + if (port->explicit_contract) { + typec_set_pwr_opmode(port->typec_port, + TYPEC_PWR_MODE_PD); + port->pwr_opmode = TYPEC_PWR_MODE_PD; + } + + tcpm_swap_complete(port, 0); + tcpm_typec_connect(port); + tcpm_check_send_discover(port); + tcpm_pps_complete(port, port->pps_status); + + power_supply_changed(port->psy); + + break; + + /* Accessory states */ + case ACC_UNATTACHED: + tcpm_acc_detach(port); + tcpm_set_state(port, SRC_UNATTACHED, 0); + break; + case DEBUG_ACC_ATTACHED: + case AUDIO_ACC_ATTACHED: + ret = tcpm_acc_attach(port); + if (ret < 0) + tcpm_set_state(port, ACC_UNATTACHED, 0); + break; + case AUDIO_ACC_DEBOUNCE: + tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE); + break; + + /* Hard_Reset states */ + case HARD_RESET_SEND: + tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL); + tcpm_set_state(port, HARD_RESET_START, 0); + break; + case HARD_RESET_START: + port->hard_reset_count++; + port->tcpc->set_pd_rx(port->tcpc, false); + tcpm_unregister_altmodes(port); + port->send_discover = true; + if (port->pwr_role == TYPEC_SOURCE) + tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF, + PD_T_PS_HARD_RESET); + else + tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0); + break; + case SRC_HARD_RESET_VBUS_OFF: + tcpm_set_vconn(port, true); + tcpm_set_vbus(port, false); + tcpm_set_roles(port, false, TYPEC_SOURCE, TYPEC_HOST); + tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER); + break; + case SRC_HARD_RESET_VBUS_ON: + tcpm_set_vbus(port, true); + port->tcpc->set_pd_rx(port->tcpc, true); + tcpm_set_attached_state(port, true); + tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON); + break; + case SNK_HARD_RESET_SINK_OFF: + memset(&port->pps_data, 0, sizeof(port->pps_data)); + tcpm_set_vconn(port, false); + tcpm_set_charge(port, false); + tcpm_set_roles(port, false, TYPEC_SINK, TYPEC_DEVICE); + /* + * VBUS may or may not toggle, depending on the adapter. + * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON + * directly after timeout. + */ + tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V); + break; + case SNK_HARD_RESET_WAIT_VBUS: + /* Assume we're disconnected if VBUS doesn't come back. */ + tcpm_set_state(port, SNK_UNATTACHED, + PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON); + break; + case SNK_HARD_RESET_SINK_ON: + /* Note: There is no guarantee that VBUS is on in this state */ + /* + * XXX: + * The specification suggests that dual mode ports in sink + * mode should transition to state PE_SRC_Transition_to_default. + * See USB power delivery specification chapter 8.3.3.6.1.3. + * This would mean to to + * - turn off VCONN, reset power supply + * - request hardware reset + * - turn on VCONN + * - Transition to state PE_Src_Startup + * SNK only ports shall transition to state Snk_Startup + * (see chapter 8.3.3.3.8). + * Similar, dual-mode ports in source mode should transition + * to PE_SNK_Transition_to_default. + */ + tcpm_set_attached_state(port, true); + tcpm_set_state(port, SNK_STARTUP, 0); + break; + + /* Soft_Reset states */ + case SOFT_RESET: + port->message_id = 0; + port->rx_msgid = -1; + tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + if (port->pwr_role == TYPEC_SOURCE) + tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); + else + tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); + break; + case SOFT_RESET_SEND: + port->message_id = 0; + port->rx_msgid = -1; + if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET)) + tcpm_set_state_cond(port, hard_reset_state(port), 0); + else + tcpm_set_state_cond(port, hard_reset_state(port), + PD_T_SENDER_RESPONSE); + break; + + /* DR_Swap states */ + case DR_SWAP_SEND: + tcpm_pd_send_control(port, PD_CTRL_DR_SWAP); + tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT, + PD_T_SENDER_RESPONSE); + break; + case DR_SWAP_ACCEPT: + tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0); + break; + case DR_SWAP_SEND_TIMEOUT: + tcpm_swap_complete(port, -ETIMEDOUT); + tcpm_set_state(port, ready_state(port), 0); + break; + case DR_SWAP_CHANGE_DR: + if (port->data_role == TYPEC_HOST) { + tcpm_unregister_altmodes(port); + tcpm_set_roles(port, true, port->pwr_role, + TYPEC_DEVICE); + } else { + tcpm_set_roles(port, true, port->pwr_role, + TYPEC_HOST); + port->send_discover = true; + } + tcpm_set_state(port, ready_state(port), 0); + break; + + /* PR_Swap states */ + case PR_SWAP_ACCEPT: + tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_set_state(port, PR_SWAP_START, 0); + break; + case PR_SWAP_SEND: + tcpm_pd_send_control(port, PD_CTRL_PR_SWAP); + tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT, + PD_T_SENDER_RESPONSE); + break; + case PR_SWAP_SEND_TIMEOUT: + tcpm_swap_complete(port, -ETIMEDOUT); + tcpm_set_state(port, ready_state(port), 0); + break; + case PR_SWAP_START: + if (port->pwr_role == TYPEC_SOURCE) + tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF, + PD_T_SRC_TRANSITION); + else + tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0); + break; + case PR_SWAP_SRC_SNK_TRANSITION_OFF: + tcpm_set_vbus(port, false); + port->explicit_contract = false; + /* allow time for Vbus discharge, must be < tSrcSwapStdby */ + tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, + PD_T_SRCSWAPSTDBY); + break; + case PR_SWAP_SRC_SNK_SOURCE_OFF: + tcpm_set_cc(port, TYPEC_CC_RD); + /* allow CC debounce */ + tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED, + PD_T_CC_DEBOUNCE); + break; + case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: + /* + * USB-PD standard, 6.2.1.4, Port Power Role: + * "During the Power Role Swap Sequence, for the initial Source + * Port, the Port Power Role field shall be set to Sink in the + * PS_RDY Message indicating that the initial Source’s power + * supply is turned off" + */ + tcpm_set_pwr_role(port, TYPEC_SINK); + if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) { + tcpm_set_state(port, ERROR_RECOVERY, 0); + break; + } + tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON); + break; + case PR_SWAP_SRC_SNK_SINK_ON: + tcpm_set_state(port, SNK_STARTUP, 0); + break; + case PR_SWAP_SNK_SRC_SINK_OFF: + tcpm_set_charge(port, false); + tcpm_set_state(port, hard_reset_state(port), + PD_T_PS_SOURCE_OFF); + break; + case PR_SWAP_SNK_SRC_SOURCE_ON: + tcpm_set_cc(port, tcpm_rp_cc(port)); + tcpm_set_vbus(port, true); + /* + * allow time VBUS ramp-up, must be < tNewSrc + * Also, this window overlaps with CC debounce as well. + * So, Wait for the max of two which is PD_T_NEWSRC + */ + tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP, + PD_T_NEWSRC); + break; + case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP: + /* + * USB PD standard, 6.2.1.4: + * "Subsequent Messages initiated by the Policy Engine, + * such as the PS_RDY Message sent to indicate that Vbus + * is ready, will have the Port Power Role field set to + * Source." + */ + tcpm_set_pwr_role(port, TYPEC_SOURCE); + tcpm_pd_send_control(port, PD_CTRL_PS_RDY); + tcpm_set_state(port, SRC_STARTUP, 0); + break; + + case VCONN_SWAP_ACCEPT: + tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_set_state(port, VCONN_SWAP_START, 0); + break; + case VCONN_SWAP_SEND: + tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP); + tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT, + PD_T_SENDER_RESPONSE); + break; + case VCONN_SWAP_SEND_TIMEOUT: + tcpm_swap_complete(port, -ETIMEDOUT); + tcpm_set_state(port, ready_state(port), 0); + break; + case VCONN_SWAP_START: + if (port->vconn_role == TYPEC_SOURCE) + tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0); + else + tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0); + break; + case VCONN_SWAP_WAIT_FOR_VCONN: + tcpm_set_state(port, hard_reset_state(port), + PD_T_VCONN_SOURCE_ON); + break; + case VCONN_SWAP_TURN_ON_VCONN: + tcpm_set_vconn(port, true); + tcpm_pd_send_control(port, PD_CTRL_PS_RDY); + tcpm_set_state(port, ready_state(port), 0); + break; + case VCONN_SWAP_TURN_OFF_VCONN: + tcpm_set_vconn(port, false); + tcpm_set_state(port, ready_state(port), 0); + break; + + case DR_SWAP_CANCEL: + case PR_SWAP_CANCEL: + case VCONN_SWAP_CANCEL: + tcpm_swap_complete(port, port->swap_status); + if (port->pwr_role == TYPEC_SOURCE) + tcpm_set_state(port, SRC_READY, 0); + else + tcpm_set_state(port, SNK_READY, 0); + break; + + case BIST_RX: + switch (BDO_MODE_MASK(port->bist_request)) { + case BDO_MODE_CARRIER2: + tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL); + break; + default: + break; + } + /* Always switch to unattached state */ + tcpm_set_state(port, unattached_state(port), 0); + break; + case GET_STATUS_SEND: + tcpm_pd_send_control(port, PD_CTRL_GET_STATUS); + tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT, + PD_T_SENDER_RESPONSE); + break; + case GET_STATUS_SEND_TIMEOUT: + tcpm_set_state(port, ready_state(port), 0); + break; + case GET_PPS_STATUS_SEND: + tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS); + tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT, + PD_T_SENDER_RESPONSE); + break; + case GET_PPS_STATUS_SEND_TIMEOUT: + tcpm_set_state(port, ready_state(port), 0); + break; + case ERROR_RECOVERY: + tcpm_swap_complete(port, -EPROTO); + tcpm_pps_complete(port, -EPROTO); + tcpm_set_state(port, PORT_RESET, 0); + break; + case PORT_RESET: + tcpm_reset_port(port); + tcpm_set_cc(port, TYPEC_CC_OPEN); + tcpm_set_state(port, PORT_RESET_WAIT_OFF, + PD_T_ERROR_RECOVERY); + break; + case PORT_RESET_WAIT_OFF: + tcpm_set_state(port, + tcpm_default_state(port), + port->vbus_present ? PD_T_PS_SOURCE_OFF : 0); + break; + default: + WARN(1, "Unexpected port state %d\n", port->state); + break; + } +} + +static void tcpm_state_machine_work(struct work_struct *work) +{ + struct tcpm_port *port = container_of(work, struct tcpm_port, + state_machine.work); + enum tcpm_state prev_state; + + mutex_lock(&port->lock); + port->state_machine_running = true; + + if (port->queued_message && tcpm_send_queued_message(port)) + goto done; + + /* If we were queued due to a delayed state change, update it now */ + if (port->delayed_state) { + tcpm_log(port, "state change %s -> %s [delayed %ld ms]", + tcpm_states[port->state], + tcpm_states[port->delayed_state], port->delay_ms); + port->prev_state = port->state; + port->state = port->delayed_state; + port->delayed_state = INVALID_STATE; + } + + /* + * Continue running as long as we have (non-delayed) state changes + * to make. + */ + do { + prev_state = port->state; + run_state_machine(port); + if (port->queued_message) + tcpm_send_queued_message(port); + } while (port->state != prev_state && !port->delayed_state); + +done: + port->state_machine_running = false; + mutex_unlock(&port->lock); +} + +static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1, + enum typec_cc_status cc2) +{ + enum typec_cc_status old_cc1, old_cc2; + enum tcpm_state new_state; + + old_cc1 = port->cc1; + old_cc2 = port->cc2; + port->cc1 = cc1; + port->cc2 = cc2; + + tcpm_log_force(port, + "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]", + old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state], + port->polarity, + tcpm_port_is_disconnected(port) ? "disconnected" + : "connected"); + + switch (port->state) { + case DRP_TOGGLING: + if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || + tcpm_port_is_source(port)) + tcpm_set_state(port, SRC_ATTACH_WAIT, 0); + else if (tcpm_port_is_sink(port)) + tcpm_set_state(port, SNK_ATTACH_WAIT, 0); + break; + case SRC_UNATTACHED: + case ACC_UNATTACHED: + if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || + tcpm_port_is_source(port)) + tcpm_set_state(port, SRC_ATTACH_WAIT, 0); + break; + case SRC_ATTACH_WAIT: + if (tcpm_port_is_disconnected(port) || + tcpm_port_is_audio_detached(port)) + tcpm_set_state(port, SRC_UNATTACHED, 0); + else if (cc1 != old_cc1 || cc2 != old_cc2) + tcpm_set_state(port, SRC_ATTACH_WAIT, 0); + break; + case SRC_ATTACHED: + case SRC_SEND_CAPABILITIES: + case SRC_READY: + if (tcpm_port_is_disconnected(port) || + !tcpm_port_is_source(port)) + tcpm_set_state(port, SRC_UNATTACHED, 0); + break; + case SNK_UNATTACHED: + if (tcpm_port_is_sink(port)) + tcpm_set_state(port, SNK_ATTACH_WAIT, 0); + break; + case SNK_ATTACH_WAIT: + if ((port->cc1 == TYPEC_CC_OPEN && + port->cc2 != TYPEC_CC_OPEN) || + (port->cc1 != TYPEC_CC_OPEN && + port->cc2 == TYPEC_CC_OPEN)) + new_state = SNK_DEBOUNCED; + else if (tcpm_port_is_disconnected(port)) + new_state = SNK_UNATTACHED; + else + break; + if (new_state != port->delayed_state) + tcpm_set_state(port, SNK_ATTACH_WAIT, 0); + break; + case SNK_DEBOUNCED: + if (tcpm_port_is_disconnected(port)) + new_state = SNK_UNATTACHED; + else if (port->vbus_present) + new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED; + else + new_state = SNK_UNATTACHED; + if (new_state != port->delayed_state) + tcpm_set_state(port, SNK_DEBOUNCED, 0); + break; + case SNK_READY: + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(port, unattached_state(port), 0); + else if (!port->pd_capable && + (cc1 != old_cc1 || cc2 != old_cc2)) + tcpm_set_current_limit(port, + tcpm_get_current_limit(port), + 5000); + break; + + case AUDIO_ACC_ATTACHED: + if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN) + tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0); + break; + case AUDIO_ACC_DEBOUNCE: + if (tcpm_port_is_audio(port)) + tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0); + break; + + case DEBUG_ACC_ATTACHED: + if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN) + tcpm_set_state(port, ACC_UNATTACHED, 0); + break; + + case SNK_TRY: + /* Do nothing, waiting for timeout */ + break; + + case SNK_DISCOVERY: + /* CC line is unstable, wait for debounce */ + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0); + break; + case SNK_DISCOVERY_DEBOUNCE: + break; + + case SRC_TRYWAIT: + /* Hand over to state machine if needed */ + if (!port->vbus_present && tcpm_port_is_source(port)) + tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0); + break; + case SRC_TRYWAIT_DEBOUNCE: + if (port->vbus_present || !tcpm_port_is_source(port)) + tcpm_set_state(port, SRC_TRYWAIT, 0); + break; + case SNK_TRY_WAIT_DEBOUNCE: + if (!tcpm_port_is_sink(port)) { + port->max_wait = 0; + tcpm_set_state(port, SRC_TRYWAIT, 0); + } + break; + case SRC_TRY_WAIT: + if (tcpm_port_is_source(port)) + tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0); + break; + case SRC_TRY_DEBOUNCE: + tcpm_set_state(port, SRC_TRY_WAIT, 0); + break; + case SNK_TRYWAIT_DEBOUNCE: + if (tcpm_port_is_sink(port)) + tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0); + break; + case SNK_TRYWAIT_VBUS: + if (!tcpm_port_is_sink(port)) + tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0); + break; + case SNK_TRYWAIT: + /* Do nothing, waiting for tCCDebounce */ + break; + case PR_SWAP_SNK_SRC_SINK_OFF: + case PR_SWAP_SRC_SNK_TRANSITION_OFF: + case PR_SWAP_SRC_SNK_SOURCE_OFF: + case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: + case PR_SWAP_SNK_SRC_SOURCE_ON: + /* + * CC state change is expected in PR_SWAP + * Ignore it. + */ + break; + + default: + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(port, unattached_state(port), 0); + break; + } +} + +static void _tcpm_pd_vbus_on(struct tcpm_port *port) +{ + tcpm_log_force(port, "VBUS on"); + port->vbus_present = true; + switch (port->state) { + case SNK_TRANSITION_SINK_VBUS: + port->explicit_contract = true; + tcpm_set_state(port, SNK_READY, 0); + break; + case SNK_DISCOVERY: + tcpm_set_state(port, SNK_DISCOVERY, 0); + break; + + case SNK_DEBOUNCED: + tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY + : SNK_ATTACHED, + 0); + break; + case SNK_HARD_RESET_WAIT_VBUS: + tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0); + break; + case SRC_ATTACHED: + tcpm_set_state(port, SRC_STARTUP, 0); + break; + case SRC_HARD_RESET_VBUS_ON: + tcpm_set_state(port, SRC_STARTUP, 0); + break; + + case SNK_TRY: + /* Do nothing, waiting for timeout */ + break; + case SRC_TRYWAIT: + /* Do nothing, Waiting for Rd to be detected */ + break; + case SRC_TRYWAIT_DEBOUNCE: + tcpm_set_state(port, SRC_TRYWAIT, 0); + break; + case SNK_TRY_WAIT_DEBOUNCE: + /* Do nothing, waiting for PD_DEBOUNCE to do be done */ + break; + case SNK_TRYWAIT: + /* Do nothing, waiting for tCCDebounce */ + break; + case SNK_TRYWAIT_VBUS: + if (tcpm_port_is_sink(port)) + tcpm_set_state(port, SNK_ATTACHED, 0); + break; + case SNK_TRYWAIT_DEBOUNCE: + /* Do nothing, waiting for Rp */ + break; + case SRC_TRY_WAIT: + case SRC_TRY_DEBOUNCE: + /* Do nothing, waiting for sink detection */ + break; + default: + break; + } +} + +static void _tcpm_pd_vbus_off(struct tcpm_port *port) +{ + tcpm_log_force(port, "VBUS off"); + port->vbus_present = false; + port->vbus_never_low = false; + switch (port->state) { + case SNK_HARD_RESET_SINK_OFF: + tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0); + break; + case SRC_HARD_RESET_VBUS_OFF: + tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0); + break; + case HARD_RESET_SEND: + break; + + case SNK_TRY: + /* Do nothing, waiting for timeout */ + break; + case SRC_TRYWAIT: + /* Hand over to state machine if needed */ + if (tcpm_port_is_source(port)) + tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0); + break; + case SNK_TRY_WAIT_DEBOUNCE: + /* Do nothing, waiting for PD_DEBOUNCE to do be done */ + break; + case SNK_TRYWAIT: + case SNK_TRYWAIT_VBUS: + case SNK_TRYWAIT_DEBOUNCE: + break; + case SNK_ATTACH_WAIT: + tcpm_set_state(port, SNK_UNATTACHED, 0); + break; + + case SNK_NEGOTIATE_CAPABILITIES: + break; + + case PR_SWAP_SRC_SNK_TRANSITION_OFF: + tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0); + break; + + case PR_SWAP_SNK_SRC_SINK_OFF: + /* Do nothing, expected */ + break; + + case PORT_RESET_WAIT_OFF: + tcpm_set_state(port, tcpm_default_state(port), 0); + break; + case SRC_TRY_WAIT: + case SRC_TRY_DEBOUNCE: + /* Do nothing, waiting for sink detection */ + break; + default: + if (port->pwr_role == TYPEC_SINK && + port->attached) + tcpm_set_state(port, SNK_UNATTACHED, 0); + break; + } +} + +static void _tcpm_pd_hard_reset(struct tcpm_port *port) +{ + tcpm_log_force(port, "Received hard reset"); + /* + * If we keep receiving hard reset requests, executing the hard reset + * must have failed. Revert to error recovery if that happens. + */ + tcpm_set_state(port, + port->hard_reset_count < PD_N_HARD_RESET_COUNT ? + HARD_RESET_START : ERROR_RECOVERY, + 0); +} + +static void tcpm_pd_event_handler(struct work_struct *work) +{ + struct tcpm_port *port = container_of(work, struct tcpm_port, + event_work); + u32 events; + + mutex_lock(&port->lock); + + spin_lock(&port->pd_event_lock); + while (port->pd_events) { + events = port->pd_events; + port->pd_events = 0; + spin_unlock(&port->pd_event_lock); + if (events & TCPM_RESET_EVENT) + _tcpm_pd_hard_reset(port); + if (events & TCPM_VBUS_EVENT) { + bool vbus; + + vbus = port->tcpc->get_vbus(port->tcpc); + if (vbus) + _tcpm_pd_vbus_on(port); + else + _tcpm_pd_vbus_off(port); + } + if (events & TCPM_CC_EVENT) { + enum typec_cc_status cc1, cc2; + + if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0) + _tcpm_cc_change(port, cc1, cc2); + } + spin_lock(&port->pd_event_lock); + } + spin_unlock(&port->pd_event_lock); + mutex_unlock(&port->lock); +} + +void tcpm_cc_change(struct tcpm_port *port) +{ + spin_lock(&port->pd_event_lock); + port->pd_events |= TCPM_CC_EVENT; + spin_unlock(&port->pd_event_lock); + queue_work(port->wq, &port->event_work); +} +EXPORT_SYMBOL_GPL(tcpm_cc_change); + +void tcpm_vbus_change(struct tcpm_port *port) +{ + spin_lock(&port->pd_event_lock); + port->pd_events |= TCPM_VBUS_EVENT; + spin_unlock(&port->pd_event_lock); + queue_work(port->wq, &port->event_work); +} +EXPORT_SYMBOL_GPL(tcpm_vbus_change); + +void tcpm_pd_hard_reset(struct tcpm_port *port) +{ + spin_lock(&port->pd_event_lock); + port->pd_events = TCPM_RESET_EVENT; + spin_unlock(&port->pd_event_lock); + queue_work(port->wq, &port->event_work); +} +EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset); + +static int tcpm_dr_set(const struct typec_capability *cap, + enum typec_data_role data) +{ + struct tcpm_port *port = typec_cap_to_tcpm(cap); + int ret; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (port->port_type != TYPEC_PORT_DRP) { + ret = -EINVAL; + goto port_unlock; + } + if (port->state != SRC_READY && port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + if (port->data_role == data) { + ret = 0; + goto port_unlock; + } + + /* + * XXX + * 6.3.9: If an alternate mode is active, a request to swap + * alternate modes shall trigger a port reset. + * Reject data role swap request in this case. + */ + + if (!port->pd_capable) { + /* + * If the partner is not PD capable, reset the port to + * trigger a role change. This can only work if a preferred + * role is configured, and if it matches the requested role. + */ + if (port->try_role == TYPEC_NO_PREFERRED_ROLE || + port->try_role == port->pwr_role) { + ret = -EINVAL; + goto port_unlock; + } + port->non_pd_role_swap = true; + tcpm_set_state(port, PORT_RESET, 0); + } else { + tcpm_set_state(port, DR_SWAP_SEND, 0); + } + + port->swap_status = 0; + port->swap_pending = true; + reinit_completion(&port->swap_complete); + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->swap_complete, + msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->swap_status; + + port->non_pd_role_swap = false; + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + return ret; +} + +static int tcpm_pr_set(const struct typec_capability *cap, + enum typec_role role) +{ + struct tcpm_port *port = typec_cap_to_tcpm(cap); + int ret; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (port->port_type != TYPEC_PORT_DRP) { + ret = -EINVAL; + goto port_unlock; + } + if (port->state != SRC_READY && port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + if (role == port->pwr_role) { + ret = 0; + goto port_unlock; + } + + port->swap_status = 0; + port->swap_pending = true; + reinit_completion(&port->swap_complete); + tcpm_set_state(port, PR_SWAP_SEND, 0); + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->swap_complete, + msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->swap_status; + + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + return ret; +} + +static int tcpm_vconn_set(const struct typec_capability *cap, + enum typec_role role) +{ + struct tcpm_port *port = typec_cap_to_tcpm(cap); + int ret; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (port->state != SRC_READY && port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + if (role == port->vconn_role) { + ret = 0; + goto port_unlock; + } + + port->swap_status = 0; + port->swap_pending = true; + reinit_completion(&port->swap_complete); + tcpm_set_state(port, VCONN_SWAP_SEND, 0); + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->swap_complete, + msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->swap_status; + + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + return ret; +} + +static int tcpm_try_role(const struct typec_capability *cap, int role) +{ + struct tcpm_port *port = typec_cap_to_tcpm(cap); + struct tcpc_dev *tcpc = port->tcpc; + int ret = 0; + + mutex_lock(&port->lock); + if (tcpc->try_role) + ret = tcpc->try_role(tcpc, role); + if (!ret && !tcpc->config->try_role_hw) + port->try_role = role; + port->try_src_count = 0; + port->try_snk_count = 0; + mutex_unlock(&port->lock); + + return ret; +} + +static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr) +{ + unsigned int target_mw; + int ret; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (!port->pps_data.active) { + ret = -EOPNOTSUPP; + goto port_unlock; + } + + if (port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + if (op_curr > port->pps_data.max_curr) { + ret = -EINVAL; + goto port_unlock; + } + + target_mw = (op_curr * port->pps_data.out_volt) / 1000; + if (target_mw < port->operating_snk_mw) { + ret = -EINVAL; + goto port_unlock; + } + + reinit_completion(&port->pps_complete); + port->pps_data.op_curr = op_curr; + port->pps_status = 0; + port->pps_pending = true; + tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->pps_complete, + msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->pps_status; + + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + + return ret; +} + +static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt) +{ + unsigned int target_mw; + int ret; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (!port->pps_data.active) { + ret = -EOPNOTSUPP; + goto port_unlock; + } + + if (port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + if (out_volt < port->pps_data.min_volt || + out_volt > port->pps_data.max_volt) { + ret = -EINVAL; + goto port_unlock; + } + + target_mw = (port->pps_data.op_curr * out_volt) / 1000; + if (target_mw < port->operating_snk_mw) { + ret = -EINVAL; + goto port_unlock; + } + + reinit_completion(&port->pps_complete); + port->pps_data.out_volt = out_volt; + port->pps_status = 0; + port->pps_pending = true; + tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->pps_complete, + msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->pps_status; + + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + + return ret; +} + +static int tcpm_pps_activate(struct tcpm_port *port, bool activate) +{ + int ret = 0; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (!port->pps_data.supported) { + ret = -EOPNOTSUPP; + goto port_unlock; + } + + /* Trying to deactivate PPS when already deactivated so just bail */ + if (!port->pps_data.active && !activate) + goto port_unlock; + + if (port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + reinit_completion(&port->pps_complete); + port->pps_status = 0; + port->pps_pending = true; + + /* Trigger PPS request or move back to standard PDO contract */ + if (activate) { + port->pps_data.out_volt = port->supply_voltage; + port->pps_data.op_curr = port->current_limit; + tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); + } else { + tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); + } + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->pps_complete, + msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->pps_status; + + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + + return ret; +} + +static void tcpm_init(struct tcpm_port *port) +{ + enum typec_cc_status cc1, cc2; + + port->tcpc->init(port->tcpc); + + tcpm_reset_port(port); + + /* + * XXX + * Should possibly wait for VBUS to settle if it was enabled locally + * since tcpm_reset_port() will disable VBUS. + */ + port->vbus_present = port->tcpc->get_vbus(port->tcpc); + if (port->vbus_present) + port->vbus_never_low = true; + + tcpm_set_state(port, tcpm_default_state(port), 0); + + if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0) + _tcpm_cc_change(port, cc1, cc2); + + /* + * Some adapters need a clean slate at startup, and won't recover + * otherwise. So do not try to be fancy and force a clean disconnect. + */ + tcpm_set_state(port, PORT_RESET, 0); +} + +static int tcpm_port_type_set(const struct typec_capability *cap, + enum typec_port_type type) +{ + struct tcpm_port *port = typec_cap_to_tcpm(cap); + + mutex_lock(&port->lock); + if (type == port->port_type) + goto port_unlock; + + port->port_type = type; + + if (!port->connected) { + tcpm_set_state(port, PORT_RESET, 0); + } else if (type == TYPEC_PORT_SNK) { + if (!(port->pwr_role == TYPEC_SINK && + port->data_role == TYPEC_DEVICE)) + tcpm_set_state(port, PORT_RESET, 0); + } else if (type == TYPEC_PORT_SRC) { + if (!(port->pwr_role == TYPEC_SOURCE && + port->data_role == TYPEC_HOST)) + tcpm_set_state(port, PORT_RESET, 0); + } + +port_unlock: + mutex_unlock(&port->lock); + return 0; +} + +void tcpm_tcpc_reset(struct tcpm_port *port) +{ + mutex_lock(&port->lock); + /* XXX: Maintain PD connection if possible? */ + tcpm_init(port); + mutex_unlock(&port->lock); +} +EXPORT_SYMBOL_GPL(tcpm_tcpc_reset); + +static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo, + unsigned int nr_pdo) +{ + unsigned int i; + + if (nr_pdo > PDO_MAX_OBJECTS) + nr_pdo = PDO_MAX_OBJECTS; + + for (i = 0; i < nr_pdo; i++) + dest_pdo[i] = src_pdo[i]; + + return nr_pdo; +} + +static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo, + unsigned int nr_vdo) +{ + unsigned int i; + + if (nr_vdo > VDO_MAX_OBJECTS) + nr_vdo = VDO_MAX_OBJECTS; + + for (i = 0; i < nr_vdo; i++) + dest_vdo[i] = src_vdo[i]; + + return nr_vdo; +} + +static int tcpm_fw_get_caps(struct tcpm_port *port, + struct fwnode_handle *fwnode) +{ + const char *cap_str; + int ret; + u32 mw; + + if (!fwnode) + return -EINVAL; + + /* USB data support is optional */ + ret = fwnode_property_read_string(fwnode, "data-role", &cap_str); + if (ret == 0) { + port->typec_caps.data = typec_find_port_data_role(cap_str); + if (port->typec_caps.data < 0) + return -EINVAL; + } + + ret = fwnode_property_read_string(fwnode, "power-role", &cap_str); + if (ret < 0) + return ret; + + port->typec_caps.type = typec_find_port_power_role(cap_str); + if (port->typec_caps.type < 0) + return -EINVAL; + port->port_type = port->typec_caps.type; + + if (port->port_type == TYPEC_PORT_SNK) + goto sink; + + /* Get source pdos */ + ret = fwnode_property_read_u32_array(fwnode, "source-pdos", + NULL, 0); + if (ret <= 0) + return -EINVAL; + + port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS); + ret = fwnode_property_read_u32_array(fwnode, "source-pdos", + port->src_pdo, port->nr_src_pdo); + if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo, + port->nr_src_pdo)) + return -EINVAL; + + if (port->port_type == TYPEC_PORT_SRC) + return 0; + + /* Get the preferred power role for DRP */ + ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str); + if (ret < 0) + return ret; + + port->typec_caps.prefer_role = typec_find_power_role(cap_str); + if (port->typec_caps.prefer_role < 0) + return -EINVAL; +sink: + /* Get sink pdos */ + ret = fwnode_property_read_u32_array(fwnode, "sink-pdos", + NULL, 0); + if (ret <= 0) + return -EINVAL; + + port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS); + ret = fwnode_property_read_u32_array(fwnode, "sink-pdos", + port->snk_pdo, port->nr_snk_pdo); + if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo, + port->nr_snk_pdo)) + return -EINVAL; + + if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0) + return -EINVAL; + port->operating_snk_mw = mw / 1000; + + return 0; +} + +int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo, + unsigned int nr_pdo) +{ + if (tcpm_validate_caps(port, pdo, nr_pdo)) + return -EINVAL; + + mutex_lock(&port->lock); + port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, pdo, nr_pdo); + switch (port->state) { + case SRC_UNATTACHED: + case SRC_ATTACH_WAIT: + case SRC_TRYWAIT: + tcpm_set_cc(port, tcpm_rp_cc(port)); + break; + case SRC_SEND_CAPABILITIES: + case SRC_NEGOTIATE_CAPABILITIES: + case SRC_READY: + case SRC_WAIT_NEW_CAPABILITIES: + tcpm_set_cc(port, tcpm_rp_cc(port)); + tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); + break; + default: + break; + } + mutex_unlock(&port->lock); + return 0; +} +EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities); + +int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo, + unsigned int nr_pdo, + unsigned int operating_snk_mw) +{ + if (tcpm_validate_caps(port, pdo, nr_pdo)) + return -EINVAL; + + mutex_lock(&port->lock); + port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo); + port->operating_snk_mw = operating_snk_mw; + port->update_sink_caps = true; + + switch (port->state) { + case SNK_NEGOTIATE_CAPABILITIES: + case SNK_NEGOTIATE_PPS_CAPABILITIES: + case SNK_READY: + case SNK_TRANSITION_SINK: + case SNK_TRANSITION_SINK_VBUS: + if (port->pps_data.active) + tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); + else + tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); + break; + default: + break; + } + mutex_unlock(&port->lock); + return 0; +} +EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities); + +/* Power Supply access to expose source power information */ +enum tcpm_psy_online_states { + TCPM_PSY_OFFLINE = 0, + TCPM_PSY_FIXED_ONLINE, + TCPM_PSY_PROG_ONLINE, +}; + +static enum power_supply_property tcpm_psy_props[] = { + POWER_SUPPLY_PROP_USB_TYPE, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_VOLTAGE_MIN, + POWER_SUPPLY_PROP_VOLTAGE_MAX, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_MAX, + POWER_SUPPLY_PROP_CURRENT_NOW, +}; + +static int tcpm_psy_get_online(struct tcpm_port *port, + union power_supply_propval *val) +{ + if (port->vbus_charge) { + if (port->pps_data.active) + val->intval = TCPM_PSY_PROG_ONLINE; + else + val->intval = TCPM_PSY_FIXED_ONLINE; + } else { + val->intval = TCPM_PSY_OFFLINE; + } + + return 0; +} + +static int tcpm_psy_get_voltage_min(struct tcpm_port *port, + union power_supply_propval *val) +{ + if (port->pps_data.active) + val->intval = port->pps_data.min_volt * 1000; + else + val->intval = port->supply_voltage * 1000; + + return 0; +} + +static int tcpm_psy_get_voltage_max(struct tcpm_port *port, + union power_supply_propval *val) +{ + if (port->pps_data.active) + val->intval = port->pps_data.max_volt * 1000; + else + val->intval = port->supply_voltage * 1000; + + return 0; +} + +static int tcpm_psy_get_voltage_now(struct tcpm_port *port, + union power_supply_propval *val) +{ + val->intval = port->supply_voltage * 1000; + + return 0; +} + +static int tcpm_psy_get_current_max(struct tcpm_port *port, + union power_supply_propval *val) +{ + if (port->pps_data.active) + val->intval = port->pps_data.max_curr * 1000; + else + val->intval = port->current_limit * 1000; + + return 0; +} + +static int tcpm_psy_get_current_now(struct tcpm_port *port, + union power_supply_propval *val) +{ + val->intval = port->current_limit * 1000; + + return 0; +} + +static int tcpm_psy_get_prop(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct tcpm_port *port = power_supply_get_drvdata(psy); + int ret = 0; + + switch (psp) { + case POWER_SUPPLY_PROP_USB_TYPE: + val->intval = port->usb_type; + break; + case POWER_SUPPLY_PROP_ONLINE: + ret = tcpm_psy_get_online(port, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN: + ret = tcpm_psy_get_voltage_min(port, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + ret = tcpm_psy_get_voltage_max(port, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = tcpm_psy_get_voltage_now(port, val); + break; + case POWER_SUPPLY_PROP_CURRENT_MAX: + ret = tcpm_psy_get_current_max(port, val); + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = tcpm_psy_get_current_now(port, val); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int tcpm_psy_set_online(struct tcpm_port *port, + const union power_supply_propval *val) +{ + int ret; + + switch (val->intval) { + case TCPM_PSY_FIXED_ONLINE: + ret = tcpm_pps_activate(port, false); + break; + case TCPM_PSY_PROG_ONLINE: + ret = tcpm_pps_activate(port, true); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int tcpm_psy_set_prop(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct tcpm_port *port = power_supply_get_drvdata(psy); + int ret; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + ret = tcpm_psy_set_online(port, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + if (val->intval < port->pps_data.min_volt * 1000 || + val->intval > port->pps_data.max_volt * 1000) + ret = -EINVAL; + else + ret = tcpm_pps_set_out_volt(port, val->intval / 1000); + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + if (val->intval > port->pps_data.max_curr * 1000) + ret = -EINVAL; + else + ret = tcpm_pps_set_op_curr(port, val->intval / 1000); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int tcpm_psy_prop_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + case POWER_SUPPLY_PROP_CURRENT_NOW: + return 1; + default: + return 0; + } +} + +static enum power_supply_usb_type tcpm_psy_usb_types[] = { + POWER_SUPPLY_USB_TYPE_C, + POWER_SUPPLY_USB_TYPE_PD, + POWER_SUPPLY_USB_TYPE_PD_PPS, +}; + +static const char *tcpm_psy_name_prefix = "tcpm-source-psy-"; + +static int devm_tcpm_psy_register(struct tcpm_port *port) +{ + struct power_supply_config psy_cfg = {}; + const char *port_dev_name = dev_name(port->dev); + size_t psy_name_len = strlen(tcpm_psy_name_prefix) + + strlen(port_dev_name) + 1; + char *psy_name; + + psy_cfg.drv_data = port; + psy_cfg.fwnode = dev_fwnode(port->dev); + psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL); + if (!psy_name) + return -ENOMEM; + + snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix, + port_dev_name); + port->psy_desc.name = psy_name; + port->psy_desc.type = POWER_SUPPLY_TYPE_USB, + port->psy_desc.usb_types = tcpm_psy_usb_types; + port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types); + port->psy_desc.properties = tcpm_psy_props, + port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props), + port->psy_desc.get_property = tcpm_psy_get_prop, + port->psy_desc.set_property = tcpm_psy_set_prop, + port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable, + + port->usb_type = POWER_SUPPLY_USB_TYPE_C; + + port->psy = devm_power_supply_register(port->dev, &port->psy_desc, + &psy_cfg); + + return PTR_ERR_OR_ZERO(port->psy); +} + +static int tcpm_copy_caps(struct tcpm_port *port, + const struct tcpc_config *tcfg) +{ + if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) || + tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo)) + return -EINVAL; + + port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo, + tcfg->nr_src_pdo); + port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo, + tcfg->nr_snk_pdo); + + port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo, + tcfg->nr_snk_vdo); + + port->operating_snk_mw = tcfg->operating_snk_mw; + + port->typec_caps.prefer_role = tcfg->default_role; + port->typec_caps.type = tcfg->type; + port->typec_caps.data = tcfg->data; + + return 0; +} + +struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) +{ + struct tcpm_port *port; + int i, err; + + if (!dev || !tcpc || + !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc || + !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus || + !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit) + return ERR_PTR(-EINVAL); + + port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); + if (!port) + return ERR_PTR(-ENOMEM); + + port->dev = dev; + port->tcpc = tcpc; + + mutex_init(&port->lock); + mutex_init(&port->swap_lock); + + port->wq = create_singlethread_workqueue(dev_name(dev)); + if (!port->wq) + return ERR_PTR(-ENOMEM); + INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work); + INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work); + INIT_WORK(&port->event_work, tcpm_pd_event_handler); + + spin_lock_init(&port->pd_event_lock); + + init_completion(&port->tx_complete); + init_completion(&port->swap_complete); + init_completion(&port->pps_complete); + tcpm_debugfs_init(port); + + err = tcpm_fw_get_caps(port, tcpc->fwnode); + if ((err < 0) && tcpc->config) + err = tcpm_copy_caps(port, tcpc->config); + if (err < 0) + goto out_destroy_wq; + + if (!tcpc->config || !tcpc->config->try_role_hw) + port->try_role = port->typec_caps.prefer_role; + else + port->try_role = TYPEC_NO_PREFERRED_ROLE; + + port->typec_caps.fwnode = tcpc->fwnode; + port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */ + port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */ + port->typec_caps.dr_set = tcpm_dr_set; + port->typec_caps.pr_set = tcpm_pr_set; + port->typec_caps.vconn_set = tcpm_vconn_set; + port->typec_caps.try_role = tcpm_try_role; + port->typec_caps.port_type_set = tcpm_port_type_set; + + port->partner_desc.identity = &port->partner_ident; + port->port_type = port->typec_caps.type; + + port->role_sw = usb_role_switch_get(port->dev); + if (IS_ERR(port->role_sw)) { + err = PTR_ERR(port->role_sw); + goto out_destroy_wq; + } + + err = devm_tcpm_psy_register(port); + if (err) + goto out_destroy_wq; + + port->typec_port = typec_register_port(port->dev, &port->typec_caps); + if (IS_ERR(port->typec_port)) { + err = PTR_ERR(port->typec_port); + goto out_destroy_wq; + } + + if (tcpc->config && tcpc->config->alt_modes) { + const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes; + + i = 0; + while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) { + struct typec_altmode *alt; + + alt = typec_port_register_altmode(port->typec_port, + paltmode); + if (IS_ERR(alt)) { + tcpm_log(port, + "%s: failed to register port alternate mode 0x%x", + dev_name(dev), paltmode->svid); + break; + } + typec_altmode_set_drvdata(alt, port); + alt->ops = &tcpm_altmode_ops; + port->port_altmode[i] = alt; + i++; + paltmode++; + } + } + + mutex_lock(&port->lock); + tcpm_init(port); + mutex_unlock(&port->lock); + + tcpm_log(port, "%s: registered", dev_name(dev)); + return port; + +out_destroy_wq: + usb_role_switch_put(port->role_sw); + destroy_workqueue(port->wq); + return ERR_PTR(err); +} +EXPORT_SYMBOL_GPL(tcpm_register_port); + +void tcpm_unregister_port(struct tcpm_port *port) +{ + int i; + + tcpm_reset_port(port); + for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++) + typec_unregister_altmode(port->port_altmode[i]); + typec_unregister_port(port->typec_port); + usb_role_switch_put(port->role_sw); + tcpm_debugfs_exit(port); + destroy_workqueue(port->wq); +} +EXPORT_SYMBOL_GPL(tcpm_unregister_port); + +MODULE_AUTHOR("Guenter Roeck "); +MODULE_DESCRIPTION("USB Type-C Port Manager"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/tcpm/wcove.c b/drivers/usb/typec/tcpm/wcove.c new file mode 100644 index 000000000000..423208e19383 --- /dev/null +++ b/drivers/usb/typec/tcpm/wcove.c @@ -0,0 +1,693 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * typec_wcove.c - WhiskeyCove PMIC USB Type-C PHY driver + * + * Copyright (C) 2017 Intel Corporation + * Author: Heikki Krogerus + */ + +#include +#include +#include +#include +#include +#include + +/* Register offsets */ +#define WCOVE_CHGRIRQ0 0x4e09 + +#define USBC_CONTROL1 0x7001 +#define USBC_CONTROL2 0x7002 +#define USBC_CONTROL3 0x7003 +#define USBC_CC1_CTRL 0x7004 +#define USBC_CC2_CTRL 0x7005 +#define USBC_STATUS1 0x7007 +#define USBC_STATUS2 0x7008 +#define USBC_STATUS3 0x7009 +#define USBC_CC1 0x700a +#define USBC_CC2 0x700b +#define USBC_CC1_STATUS 0x700c +#define USBC_CC2_STATUS 0x700d +#define USBC_IRQ1 0x7015 +#define USBC_IRQ2 0x7016 +#define USBC_IRQMASK1 0x7017 +#define USBC_IRQMASK2 0x7018 +#define USBC_PDCFG2 0x701a +#define USBC_PDCFG3 0x701b +#define USBC_PDSTATUS 0x701c +#define USBC_RXSTATUS 0x701d +#define USBC_RXINFO 0x701e +#define USBC_TXCMD 0x701f +#define USBC_TXINFO 0x7020 +#define USBC_RX_DATA 0x7028 +#define USBC_TX_DATA 0x7047 + +/* Register bits */ + +#define USBC_CONTROL1_MODE_MASK 0x3 +#define USBC_CONTROL1_MODE_SNK 0 +#define USBC_CONTROL1_MODE_SNKACC 1 +#define USBC_CONTROL1_MODE_SRC 2 +#define USBC_CONTROL1_MODE_SRCACC 3 +#define USBC_CONTROL1_MODE_DRP 4 +#define USBC_CONTROL1_MODE_DRPACC 5 +#define USBC_CONTROL1_MODE_TEST 7 +#define USBC_CONTROL1_CURSRC_MASK 0xc +#define USBC_CONTROL1_CURSRC_UA_0 (0 << 3) +#define USBC_CONTROL1_CURSRC_UA_80 (1 << 3) +#define USBC_CONTROL1_CURSRC_UA_180 (2 << 3) +#define USBC_CONTROL1_CURSRC_UA_330 (3 << 3) +#define USBC_CONTROL1_DRPTOGGLE_RANDOM 0xe0 + +#define USBC_CONTROL2_UNATT_SNK BIT(0) +#define USBC_CONTROL2_UNATT_SRC BIT(1) +#define USBC_CONTROL2_DIS_ST BIT(2) + +#define USBC_CONTROL3_DET_DIS BIT(0) +#define USBC_CONTROL3_PD_DIS BIT(1) +#define USBC_CONTROL3_RESETPHY BIT(2) + +#define USBC_CC_CTRL_PU_EN BIT(0) +#define USBC_CC_CTRL_VCONN_EN BIT(1) +#define USBC_CC_CTRL_TX_EN BIT(2) +#define USBC_CC_CTRL_PD_EN BIT(3) +#define USBC_CC_CTRL_CDET_EN BIT(4) +#define USBC_CC_CTRL_RDET_EN BIT(5) +#define USBC_CC_CTRL_ADC_EN BIT(6) +#define USBC_CC_CTRL_VBUSOK BIT(7) + +#define USBC_STATUS1_DET_ONGOING BIT(6) +#define USBC_STATUS1_RSLT(r) ((r) & 0xf) +#define USBC_RSLT_NOTHING 0 +#define USBC_RSLT_SRC_DEFAULT 1 +#define USBC_RSLT_SRC_1_5A 2 +#define USBC_RSLT_SRC_3_0A 3 +#define USBC_RSLT_SNK 4 +#define USBC_RSLT_DEBUG_ACC 5 +#define USBC_RSLT_AUDIO_ACC 6 +#define USBC_RSLT_UNDEF 15 +#define USBC_STATUS1_ORIENT(r) (((r) >> 4) & 0x3) +#define USBC_ORIENT_NORMAL 1 +#define USBC_ORIENT_REVERSE 2 + +#define USBC_STATUS2_VBUS_REQ BIT(5) + +#define UCSC_CC_STATUS_SNK_RP BIT(0) +#define UCSC_CC_STATUS_PWRDEFSNK BIT(1) +#define UCSC_CC_STATUS_PWR_1P5A_SNK BIT(2) +#define UCSC_CC_STATUS_PWR_3A_SNK BIT(3) +#define UCSC_CC_STATUS_SRC_RP BIT(4) +#define UCSC_CC_STATUS_RX(r) (((r) >> 5) & 0x3) +#define USBC_CC_STATUS_RD 1 +#define USBC_CC_STATUS_RA 2 + +#define USBC_IRQ1_ADCDONE1 BIT(2) +#define USBC_IRQ1_OVERTEMP BIT(1) +#define USBC_IRQ1_SHORT BIT(0) + +#define USBC_IRQ2_CC_CHANGE BIT(7) +#define USBC_IRQ2_RX_PD BIT(6) +#define USBC_IRQ2_RX_HR BIT(5) +#define USBC_IRQ2_RX_CR BIT(4) +#define USBC_IRQ2_TX_SUCCESS BIT(3) +#define USBC_IRQ2_TX_FAIL BIT(2) + +#define USBC_IRQMASK1_ALL (USBC_IRQ1_ADCDONE1 | USBC_IRQ1_OVERTEMP | \ + USBC_IRQ1_SHORT) + +#define USBC_IRQMASK2_ALL (USBC_IRQ2_CC_CHANGE | USBC_IRQ2_RX_PD | \ + USBC_IRQ2_RX_HR | USBC_IRQ2_RX_CR | \ + USBC_IRQ2_TX_SUCCESS | USBC_IRQ2_TX_FAIL) + +#define USBC_PDCFG2_SOP BIT(0) +#define USBC_PDCFG2_SOP_P BIT(1) +#define USBC_PDCFG2_SOP_PP BIT(2) +#define USBC_PDCFG2_SOP_P_DEBUG BIT(3) +#define USBC_PDCFG2_SOP_PP_DEBUG BIT(4) + +#define USBC_PDCFG3_DATAROLE_SHIFT 1 +#define USBC_PDCFG3_SOP_SHIFT 2 + +#define USBC_RXSTATUS_RXCLEAR BIT(0) +#define USBC_RXSTATUS_RXDATA BIT(7) + +#define USBC_RXINFO_RXBYTES(i) (((i) >> 3) & 0x1f) + +#define USBC_TXCMD_BUF_RDY BIT(0) +#define USBC_TXCMD_START BIT(1) +#define USBC_TXCMD_NOP (0 << 5) +#define USBC_TXCMD_MSG (1 << 5) +#define USBC_TXCMD_CR (2 << 5) +#define USBC_TXCMD_HR (3 << 5) +#define USBC_TXCMD_BIST (4 << 5) + +#define USBC_TXINFO_RETRIES(d) (d << 3) + +struct wcove_typec { + struct mutex lock; /* device lock */ + struct device *dev; + struct regmap *regmap; + guid_t guid; + + bool vbus; + + struct tcpc_dev tcpc; + struct tcpm_port *tcpm; +}; + +#define tcpc_to_wcove(_tcpc_) container_of(_tcpc_, struct wcove_typec, tcpc) + +enum wcove_typec_func { + WCOVE_FUNC_DRIVE_VBUS = 1, + WCOVE_FUNC_ORIENTATION, + WCOVE_FUNC_ROLE, + WCOVE_FUNC_DRIVE_VCONN, +}; + +enum wcove_typec_orientation { + WCOVE_ORIENTATION_NORMAL, + WCOVE_ORIENTATION_REVERSE, +}; + +enum wcove_typec_role { + WCOVE_ROLE_HOST, + WCOVE_ROLE_DEVICE, +}; + +#define WCOVE_DSM_UUID "482383f0-2876-4e49-8685-db66211af037" + +static int wcove_typec_func(struct wcove_typec *wcove, + enum wcove_typec_func func, int param) +{ + union acpi_object *obj; + union acpi_object tmp; + union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp); + + tmp.type = ACPI_TYPE_INTEGER; + tmp.integer.value = param; + + obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), &wcove->guid, 1, func, + &argv4); + if (!obj) { + dev_err(wcove->dev, "%s: failed to evaluate _DSM\n", __func__); + return -EIO; + } + + ACPI_FREE(obj); + return 0; +} + +static int wcove_init(struct tcpc_dev *tcpc) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + int ret; + + ret = regmap_write(wcove->regmap, USBC_CONTROL1, 0); + if (ret) + return ret; + + /* Unmask everything */ + ret = regmap_write(wcove->regmap, USBC_IRQMASK1, 0); + if (ret) + return ret; + + return regmap_write(wcove->regmap, USBC_IRQMASK2, 0); +} + +static int wcove_get_vbus(struct tcpc_dev *tcpc) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + unsigned int cc1ctrl; + int ret; + + ret = regmap_read(wcove->regmap, USBC_CC1_CTRL, &cc1ctrl); + if (ret) + return ret; + + wcove->vbus = !!(cc1ctrl & USBC_CC_CTRL_VBUSOK); + + return wcove->vbus; +} + +static int wcove_set_vbus(struct tcpc_dev *tcpc, bool on, bool sink) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + + return wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VBUS, on); +} + +static int wcove_set_vconn(struct tcpc_dev *tcpc, bool on) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + + return wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, on); +} + +static enum typec_cc_status wcove_to_typec_cc(unsigned int cc) +{ + if (cc & UCSC_CC_STATUS_SNK_RP) { + if (cc & UCSC_CC_STATUS_PWRDEFSNK) + return TYPEC_CC_RP_DEF; + else if (cc & UCSC_CC_STATUS_PWR_1P5A_SNK) + return TYPEC_CC_RP_1_5; + else if (cc & UCSC_CC_STATUS_PWR_3A_SNK) + return TYPEC_CC_RP_3_0; + } else { + switch (UCSC_CC_STATUS_RX(cc)) { + case USBC_CC_STATUS_RD: + return TYPEC_CC_RD; + case USBC_CC_STATUS_RA: + return TYPEC_CC_RA; + default: + break; + } + } + return TYPEC_CC_OPEN; +} + +static int wcove_get_cc(struct tcpc_dev *tcpc, enum typec_cc_status *cc1, + enum typec_cc_status *cc2) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + unsigned int cc1_status; + unsigned int cc2_status; + int ret; + + ret = regmap_read(wcove->regmap, USBC_CC1_STATUS, &cc1_status); + if (ret) + return ret; + + ret = regmap_read(wcove->regmap, USBC_CC2_STATUS, &cc2_status); + if (ret) + return ret; + + *cc1 = wcove_to_typec_cc(cc1_status); + *cc2 = wcove_to_typec_cc(cc2_status); + + return 0; +} + +static int wcove_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + unsigned int ctrl; + + switch (cc) { + case TYPEC_CC_RD: + ctrl = USBC_CONTROL1_MODE_SNK; + break; + case TYPEC_CC_RP_DEF: + ctrl = USBC_CONTROL1_CURSRC_UA_80 | USBC_CONTROL1_MODE_SRC; + break; + case TYPEC_CC_RP_1_5: + ctrl = USBC_CONTROL1_CURSRC_UA_180 | USBC_CONTROL1_MODE_SRC; + break; + case TYPEC_CC_RP_3_0: + ctrl = USBC_CONTROL1_CURSRC_UA_330 | USBC_CONTROL1_MODE_SRC; + break; + case TYPEC_CC_OPEN: + ctrl = 0; + break; + default: + return -EINVAL; + } + + return regmap_write(wcove->regmap, USBC_CONTROL1, ctrl); +} + +static int wcove_set_polarity(struct tcpc_dev *tcpc, enum typec_cc_polarity pol) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + + return wcove_typec_func(wcove, WCOVE_FUNC_ORIENTATION, pol); +} + +static int wcove_set_current_limit(struct tcpc_dev *tcpc, u32 max_ma, u32 mv) +{ + return 0; +} + +static int wcove_set_roles(struct tcpc_dev *tcpc, bool attached, + enum typec_role role, enum typec_data_role data) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + unsigned int val; + int ret; + + ret = wcove_typec_func(wcove, WCOVE_FUNC_ROLE, data == TYPEC_HOST ? + WCOVE_ROLE_HOST : WCOVE_ROLE_DEVICE); + if (ret) + return ret; + + val = role; + val |= data << USBC_PDCFG3_DATAROLE_SHIFT; + val |= PD_REV20 << USBC_PDCFG3_SOP_SHIFT; + + return regmap_write(wcove->regmap, USBC_PDCFG3, val); +} + +static int wcove_set_pd_rx(struct tcpc_dev *tcpc, bool on) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + + return regmap_write(wcove->regmap, USBC_PDCFG2, + on ? USBC_PDCFG2_SOP : 0); +} + +static int wcove_pd_transmit(struct tcpc_dev *tcpc, + enum tcpm_transmit_type type, + const struct pd_message *msg) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + unsigned int info = 0; + unsigned int cmd; + int ret; + + ret = regmap_read(wcove->regmap, USBC_TXCMD, &cmd); + if (ret) + return ret; + + if (!(cmd & USBC_TXCMD_BUF_RDY)) { + dev_warn(wcove->dev, "%s: Last transmission still ongoing!", + __func__); + return -EBUSY; + } + + if (msg) { + const u8 *data = (void *)msg; + int i; + + for (i = 0; i < pd_header_cnt(msg->header) * 4 + 2; i++) { + ret = regmap_write(wcove->regmap, USBC_TX_DATA + i, + data[i]); + if (ret) + return ret; + } + } + + switch (type) { + case TCPC_TX_SOP: + case TCPC_TX_SOP_PRIME: + case TCPC_TX_SOP_PRIME_PRIME: + case TCPC_TX_SOP_DEBUG_PRIME: + case TCPC_TX_SOP_DEBUG_PRIME_PRIME: + info = type + 1; + cmd = USBC_TXCMD_MSG; + break; + case TCPC_TX_HARD_RESET: + cmd = USBC_TXCMD_HR; + break; + case TCPC_TX_CABLE_RESET: + cmd = USBC_TXCMD_CR; + break; + case TCPC_TX_BIST_MODE_2: + cmd = USBC_TXCMD_BIST; + break; + default: + return -EINVAL; + } + + /* NOTE Setting maximum number of retries (7) */ + ret = regmap_write(wcove->regmap, USBC_TXINFO, + info | USBC_TXINFO_RETRIES(7)); + if (ret) + return ret; + + return regmap_write(wcove->regmap, USBC_TXCMD, cmd | USBC_TXCMD_START); +} + +static int wcove_start_drp_toggling(struct tcpc_dev *tcpc, + enum typec_cc_status cc) +{ + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + unsigned int usbc_ctrl; + + usbc_ctrl = USBC_CONTROL1_MODE_DRP | USBC_CONTROL1_DRPTOGGLE_RANDOM; + + switch (cc) { + case TYPEC_CC_RP_1_5: + usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_180; + break; + case TYPEC_CC_RP_3_0: + usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_330; + break; + default: + usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_80; + break; + } + + return regmap_write(wcove->regmap, USBC_CONTROL1, usbc_ctrl); +} + +static int wcove_read_rx_buffer(struct wcove_typec *wcove, void *msg) +{ + unsigned int info; + int ret; + int i; + + ret = regmap_read(wcove->regmap, USBC_RXINFO, &info); + if (ret) + return ret; + + /* FIXME: Check that USBC_RXINFO_RXBYTES(info) matches the header */ + + for (i = 0; i < USBC_RXINFO_RXBYTES(info); i++) { + ret = regmap_read(wcove->regmap, USBC_RX_DATA + i, msg + i); + if (ret) + return ret; + } + + return regmap_write(wcove->regmap, USBC_RXSTATUS, + USBC_RXSTATUS_RXCLEAR); +} + +static irqreturn_t wcove_typec_irq(int irq, void *data) +{ + struct wcove_typec *wcove = data; + unsigned int usbc_irq1 = 0; + unsigned int usbc_irq2 = 0; + unsigned int cc1ctrl; + int ret; + + mutex_lock(&wcove->lock); + + /* Read.. */ + ret = regmap_read(wcove->regmap, USBC_IRQ1, &usbc_irq1); + if (ret) + goto err; + + ret = regmap_read(wcove->regmap, USBC_IRQ2, &usbc_irq2); + if (ret) + goto err; + + ret = regmap_read(wcove->regmap, USBC_CC1_CTRL, &cc1ctrl); + if (ret) + goto err; + + if (!wcove->tcpm) + goto err; + + /* ..check.. */ + if (usbc_irq1 & USBC_IRQ1_OVERTEMP) { + dev_err(wcove->dev, "VCONN Switch Over Temperature!\n"); + wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, false); + /* REVISIT: Report an error? */ + } + + if (usbc_irq1 & USBC_IRQ1_SHORT) { + dev_err(wcove->dev, "VCONN Switch Short Circuit!\n"); + wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, false); + /* REVISIT: Report an error? */ + } + + if (wcove->vbus != !!(cc1ctrl & USBC_CC_CTRL_VBUSOK)) + tcpm_vbus_change(wcove->tcpm); + + /* REVISIT: See if tcpm code can be made to consider Type-C HW FSMs */ + if (usbc_irq2 & USBC_IRQ2_CC_CHANGE) + tcpm_cc_change(wcove->tcpm); + + if (usbc_irq2 & USBC_IRQ2_RX_PD) { + unsigned int status; + + /* + * FIXME: Need to check if TX is ongoing and report + * TX_DIREGARDED if needed? + */ + + ret = regmap_read(wcove->regmap, USBC_RXSTATUS, &status); + if (ret) + goto err; + + /* Flush all buffers */ + while (status & USBC_RXSTATUS_RXDATA) { + struct pd_message msg; + + ret = wcove_read_rx_buffer(wcove, &msg); + if (ret) { + dev_err(wcove->dev, "%s: RX read failed\n", + __func__); + goto err; + } + + tcpm_pd_receive(wcove->tcpm, &msg); + + ret = regmap_read(wcove->regmap, USBC_RXSTATUS, + &status); + if (ret) + goto err; + } + } + + if (usbc_irq2 & USBC_IRQ2_RX_HR) + tcpm_pd_hard_reset(wcove->tcpm); + + /* REVISIT: if (usbc_irq2 & USBC_IRQ2_RX_CR) */ + + if (usbc_irq2 & USBC_IRQ2_TX_SUCCESS) + tcpm_pd_transmit_complete(wcove->tcpm, TCPC_TX_SUCCESS); + + if (usbc_irq2 & USBC_IRQ2_TX_FAIL) + tcpm_pd_transmit_complete(wcove->tcpm, TCPC_TX_FAILED); + +err: + /* ..and clear. */ + if (usbc_irq1) { + ret = regmap_write(wcove->regmap, USBC_IRQ1, usbc_irq1); + if (ret) + dev_WARN(wcove->dev, "%s failed to clear IRQ1\n", + __func__); + } + + if (usbc_irq2) { + ret = regmap_write(wcove->regmap, USBC_IRQ2, usbc_irq2); + if (ret) + dev_WARN(wcove->dev, "%s failed to clear IRQ2\n", + __func__); + } + + /* REVISIT: Clear WhiskeyCove CHGR Type-C interrupt */ + regmap_write(wcove->regmap, WCOVE_CHGRIRQ0, BIT(5)); + + mutex_unlock(&wcove->lock); + return IRQ_HANDLED; +} + +/* + * The following power levels should be safe to use with Joule board. + */ +static const u32 src_pdo[] = { + PDO_FIXED(5000, 1500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | + PDO_FIXED_USB_COMM), +}; + +static const u32 snk_pdo[] = { + PDO_FIXED(5000, 500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | + PDO_FIXED_USB_COMM), + PDO_VAR(5000, 12000, 3000), +}; + +static struct tcpc_config wcove_typec_config = { + .src_pdo = src_pdo, + .nr_src_pdo = ARRAY_SIZE(src_pdo), + .snk_pdo = snk_pdo, + .nr_snk_pdo = ARRAY_SIZE(snk_pdo), + + .operating_snk_mw = 15000, + + .type = TYPEC_PORT_DRP, + .data = TYPEC_PORT_DRD, + .default_role = TYPEC_SINK, +}; + +static int wcove_typec_probe(struct platform_device *pdev) +{ + struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent); + struct wcove_typec *wcove; + int irq; + int ret; + + wcove = devm_kzalloc(&pdev->dev, sizeof(*wcove), GFP_KERNEL); + if (!wcove) + return -ENOMEM; + + mutex_init(&wcove->lock); + wcove->dev = &pdev->dev; + wcove->regmap = pmic->regmap; + + irq = regmap_irq_get_virq(pmic->irq_chip_data_chgr, + platform_get_irq(pdev, 0)); + if (irq < 0) + return irq; + + ret = guid_parse(WCOVE_DSM_UUID, &wcove->guid); + if (ret) + return ret; + + if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), &wcove->guid, 0, 0x1f)) { + dev_err(&pdev->dev, "Missing _DSM functions\n"); + return -ENODEV; + } + + wcove->tcpc.init = wcove_init; + wcove->tcpc.get_vbus = wcove_get_vbus; + wcove->tcpc.set_vbus = wcove_set_vbus; + wcove->tcpc.set_cc = wcove_set_cc; + wcove->tcpc.get_cc = wcove_get_cc; + wcove->tcpc.set_polarity = wcove_set_polarity; + wcove->tcpc.set_vconn = wcove_set_vconn; + wcove->tcpc.set_current_limit = wcove_set_current_limit; + wcove->tcpc.start_drp_toggling = wcove_start_drp_toggling; + + wcove->tcpc.set_pd_rx = wcove_set_pd_rx; + wcove->tcpc.set_roles = wcove_set_roles; + wcove->tcpc.pd_transmit = wcove_pd_transmit; + + wcove->tcpc.config = &wcove_typec_config; + + wcove->tcpm = tcpm_register_port(wcove->dev, &wcove->tcpc); + if (IS_ERR(wcove->tcpm)) + return PTR_ERR(wcove->tcpm); + + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + wcove_typec_irq, IRQF_ONESHOT, + "wcove_typec", wcove); + if (ret) { + tcpm_unregister_port(wcove->tcpm); + return ret; + } + + platform_set_drvdata(pdev, wcove); + return 0; +} + +static int wcove_typec_remove(struct platform_device *pdev) +{ + struct wcove_typec *wcove = platform_get_drvdata(pdev); + unsigned int val; + + /* Mask everything */ + regmap_read(wcove->regmap, USBC_IRQMASK1, &val); + regmap_write(wcove->regmap, USBC_IRQMASK1, val | USBC_IRQMASK1_ALL); + regmap_read(wcove->regmap, USBC_IRQMASK2, &val); + regmap_write(wcove->regmap, USBC_IRQMASK2, val | USBC_IRQMASK2_ALL); + + tcpm_unregister_port(wcove->tcpm); + + return 0; +} + +static struct platform_driver wcove_typec_driver = { + .driver = { + .name = "bxt_wcove_usbc", + }, + .probe = wcove_typec_probe, + .remove = wcove_typec_remove, +}; + +module_platform_driver(wcove_typec_driver); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("WhiskeyCove PMIC USB Type-C PHY driver"); +MODULE_ALIAS("platform:bxt_wcove_usbc"); diff --git a/drivers/usb/typec/typec_wcove.c b/drivers/usb/typec/typec_wcove.c deleted file mode 100644 index 423208e19383..000000000000 --- a/drivers/usb/typec/typec_wcove.c +++ /dev/null @@ -1,693 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/** - * typec_wcove.c - WhiskeyCove PMIC USB Type-C PHY driver - * - * Copyright (C) 2017 Intel Corporation - * Author: Heikki Krogerus - */ - -#include -#include -#include -#include -#include -#include - -/* Register offsets */ -#define WCOVE_CHGRIRQ0 0x4e09 - -#define USBC_CONTROL1 0x7001 -#define USBC_CONTROL2 0x7002 -#define USBC_CONTROL3 0x7003 -#define USBC_CC1_CTRL 0x7004 -#define USBC_CC2_CTRL 0x7005 -#define USBC_STATUS1 0x7007 -#define USBC_STATUS2 0x7008 -#define USBC_STATUS3 0x7009 -#define USBC_CC1 0x700a -#define USBC_CC2 0x700b -#define USBC_CC1_STATUS 0x700c -#define USBC_CC2_STATUS 0x700d -#define USBC_IRQ1 0x7015 -#define USBC_IRQ2 0x7016 -#define USBC_IRQMASK1 0x7017 -#define USBC_IRQMASK2 0x7018 -#define USBC_PDCFG2 0x701a -#define USBC_PDCFG3 0x701b -#define USBC_PDSTATUS 0x701c -#define USBC_RXSTATUS 0x701d -#define USBC_RXINFO 0x701e -#define USBC_TXCMD 0x701f -#define USBC_TXINFO 0x7020 -#define USBC_RX_DATA 0x7028 -#define USBC_TX_DATA 0x7047 - -/* Register bits */ - -#define USBC_CONTROL1_MODE_MASK 0x3 -#define USBC_CONTROL1_MODE_SNK 0 -#define USBC_CONTROL1_MODE_SNKACC 1 -#define USBC_CONTROL1_MODE_SRC 2 -#define USBC_CONTROL1_MODE_SRCACC 3 -#define USBC_CONTROL1_MODE_DRP 4 -#define USBC_CONTROL1_MODE_DRPACC 5 -#define USBC_CONTROL1_MODE_TEST 7 -#define USBC_CONTROL1_CURSRC_MASK 0xc -#define USBC_CONTROL1_CURSRC_UA_0 (0 << 3) -#define USBC_CONTROL1_CURSRC_UA_80 (1 << 3) -#define USBC_CONTROL1_CURSRC_UA_180 (2 << 3) -#define USBC_CONTROL1_CURSRC_UA_330 (3 << 3) -#define USBC_CONTROL1_DRPTOGGLE_RANDOM 0xe0 - -#define USBC_CONTROL2_UNATT_SNK BIT(0) -#define USBC_CONTROL2_UNATT_SRC BIT(1) -#define USBC_CONTROL2_DIS_ST BIT(2) - -#define USBC_CONTROL3_DET_DIS BIT(0) -#define USBC_CONTROL3_PD_DIS BIT(1) -#define USBC_CONTROL3_RESETPHY BIT(2) - -#define USBC_CC_CTRL_PU_EN BIT(0) -#define USBC_CC_CTRL_VCONN_EN BIT(1) -#define USBC_CC_CTRL_TX_EN BIT(2) -#define USBC_CC_CTRL_PD_EN BIT(3) -#define USBC_CC_CTRL_CDET_EN BIT(4) -#define USBC_CC_CTRL_RDET_EN BIT(5) -#define USBC_CC_CTRL_ADC_EN BIT(6) -#define USBC_CC_CTRL_VBUSOK BIT(7) - -#define USBC_STATUS1_DET_ONGOING BIT(6) -#define USBC_STATUS1_RSLT(r) ((r) & 0xf) -#define USBC_RSLT_NOTHING 0 -#define USBC_RSLT_SRC_DEFAULT 1 -#define USBC_RSLT_SRC_1_5A 2 -#define USBC_RSLT_SRC_3_0A 3 -#define USBC_RSLT_SNK 4 -#define USBC_RSLT_DEBUG_ACC 5 -#define USBC_RSLT_AUDIO_ACC 6 -#define USBC_RSLT_UNDEF 15 -#define USBC_STATUS1_ORIENT(r) (((r) >> 4) & 0x3) -#define USBC_ORIENT_NORMAL 1 -#define USBC_ORIENT_REVERSE 2 - -#define USBC_STATUS2_VBUS_REQ BIT(5) - -#define UCSC_CC_STATUS_SNK_RP BIT(0) -#define UCSC_CC_STATUS_PWRDEFSNK BIT(1) -#define UCSC_CC_STATUS_PWR_1P5A_SNK BIT(2) -#define UCSC_CC_STATUS_PWR_3A_SNK BIT(3) -#define UCSC_CC_STATUS_SRC_RP BIT(4) -#define UCSC_CC_STATUS_RX(r) (((r) >> 5) & 0x3) -#define USBC_CC_STATUS_RD 1 -#define USBC_CC_STATUS_RA 2 - -#define USBC_IRQ1_ADCDONE1 BIT(2) -#define USBC_IRQ1_OVERTEMP BIT(1) -#define USBC_IRQ1_SHORT BIT(0) - -#define USBC_IRQ2_CC_CHANGE BIT(7) -#define USBC_IRQ2_RX_PD BIT(6) -#define USBC_IRQ2_RX_HR BIT(5) -#define USBC_IRQ2_RX_CR BIT(4) -#define USBC_IRQ2_TX_SUCCESS BIT(3) -#define USBC_IRQ2_TX_FAIL BIT(2) - -#define USBC_IRQMASK1_ALL (USBC_IRQ1_ADCDONE1 | USBC_IRQ1_OVERTEMP | \ - USBC_IRQ1_SHORT) - -#define USBC_IRQMASK2_ALL (USBC_IRQ2_CC_CHANGE | USBC_IRQ2_RX_PD | \ - USBC_IRQ2_RX_HR | USBC_IRQ2_RX_CR | \ - USBC_IRQ2_TX_SUCCESS | USBC_IRQ2_TX_FAIL) - -#define USBC_PDCFG2_SOP BIT(0) -#define USBC_PDCFG2_SOP_P BIT(1) -#define USBC_PDCFG2_SOP_PP BIT(2) -#define USBC_PDCFG2_SOP_P_DEBUG BIT(3) -#define USBC_PDCFG2_SOP_PP_DEBUG BIT(4) - -#define USBC_PDCFG3_DATAROLE_SHIFT 1 -#define USBC_PDCFG3_SOP_SHIFT 2 - -#define USBC_RXSTATUS_RXCLEAR BIT(0) -#define USBC_RXSTATUS_RXDATA BIT(7) - -#define USBC_RXINFO_RXBYTES(i) (((i) >> 3) & 0x1f) - -#define USBC_TXCMD_BUF_RDY BIT(0) -#define USBC_TXCMD_START BIT(1) -#define USBC_TXCMD_NOP (0 << 5) -#define USBC_TXCMD_MSG (1 << 5) -#define USBC_TXCMD_CR (2 << 5) -#define USBC_TXCMD_HR (3 << 5) -#define USBC_TXCMD_BIST (4 << 5) - -#define USBC_TXINFO_RETRIES(d) (d << 3) - -struct wcove_typec { - struct mutex lock; /* device lock */ - struct device *dev; - struct regmap *regmap; - guid_t guid; - - bool vbus; - - struct tcpc_dev tcpc; - struct tcpm_port *tcpm; -}; - -#define tcpc_to_wcove(_tcpc_) container_of(_tcpc_, struct wcove_typec, tcpc) - -enum wcove_typec_func { - WCOVE_FUNC_DRIVE_VBUS = 1, - WCOVE_FUNC_ORIENTATION, - WCOVE_FUNC_ROLE, - WCOVE_FUNC_DRIVE_VCONN, -}; - -enum wcove_typec_orientation { - WCOVE_ORIENTATION_NORMAL, - WCOVE_ORIENTATION_REVERSE, -}; - -enum wcove_typec_role { - WCOVE_ROLE_HOST, - WCOVE_ROLE_DEVICE, -}; - -#define WCOVE_DSM_UUID "482383f0-2876-4e49-8685-db66211af037" - -static int wcove_typec_func(struct wcove_typec *wcove, - enum wcove_typec_func func, int param) -{ - union acpi_object *obj; - union acpi_object tmp; - union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp); - - tmp.type = ACPI_TYPE_INTEGER; - tmp.integer.value = param; - - obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), &wcove->guid, 1, func, - &argv4); - if (!obj) { - dev_err(wcove->dev, "%s: failed to evaluate _DSM\n", __func__); - return -EIO; - } - - ACPI_FREE(obj); - return 0; -} - -static int wcove_init(struct tcpc_dev *tcpc) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - int ret; - - ret = regmap_write(wcove->regmap, USBC_CONTROL1, 0); - if (ret) - return ret; - - /* Unmask everything */ - ret = regmap_write(wcove->regmap, USBC_IRQMASK1, 0); - if (ret) - return ret; - - return regmap_write(wcove->regmap, USBC_IRQMASK2, 0); -} - -static int wcove_get_vbus(struct tcpc_dev *tcpc) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - unsigned int cc1ctrl; - int ret; - - ret = regmap_read(wcove->regmap, USBC_CC1_CTRL, &cc1ctrl); - if (ret) - return ret; - - wcove->vbus = !!(cc1ctrl & USBC_CC_CTRL_VBUSOK); - - return wcove->vbus; -} - -static int wcove_set_vbus(struct tcpc_dev *tcpc, bool on, bool sink) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - - return wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VBUS, on); -} - -static int wcove_set_vconn(struct tcpc_dev *tcpc, bool on) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - - return wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, on); -} - -static enum typec_cc_status wcove_to_typec_cc(unsigned int cc) -{ - if (cc & UCSC_CC_STATUS_SNK_RP) { - if (cc & UCSC_CC_STATUS_PWRDEFSNK) - return TYPEC_CC_RP_DEF; - else if (cc & UCSC_CC_STATUS_PWR_1P5A_SNK) - return TYPEC_CC_RP_1_5; - else if (cc & UCSC_CC_STATUS_PWR_3A_SNK) - return TYPEC_CC_RP_3_0; - } else { - switch (UCSC_CC_STATUS_RX(cc)) { - case USBC_CC_STATUS_RD: - return TYPEC_CC_RD; - case USBC_CC_STATUS_RA: - return TYPEC_CC_RA; - default: - break; - } - } - return TYPEC_CC_OPEN; -} - -static int wcove_get_cc(struct tcpc_dev *tcpc, enum typec_cc_status *cc1, - enum typec_cc_status *cc2) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - unsigned int cc1_status; - unsigned int cc2_status; - int ret; - - ret = regmap_read(wcove->regmap, USBC_CC1_STATUS, &cc1_status); - if (ret) - return ret; - - ret = regmap_read(wcove->regmap, USBC_CC2_STATUS, &cc2_status); - if (ret) - return ret; - - *cc1 = wcove_to_typec_cc(cc1_status); - *cc2 = wcove_to_typec_cc(cc2_status); - - return 0; -} - -static int wcove_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - unsigned int ctrl; - - switch (cc) { - case TYPEC_CC_RD: - ctrl = USBC_CONTROL1_MODE_SNK; - break; - case TYPEC_CC_RP_DEF: - ctrl = USBC_CONTROL1_CURSRC_UA_80 | USBC_CONTROL1_MODE_SRC; - break; - case TYPEC_CC_RP_1_5: - ctrl = USBC_CONTROL1_CURSRC_UA_180 | USBC_CONTROL1_MODE_SRC; - break; - case TYPEC_CC_RP_3_0: - ctrl = USBC_CONTROL1_CURSRC_UA_330 | USBC_CONTROL1_MODE_SRC; - break; - case TYPEC_CC_OPEN: - ctrl = 0; - break; - default: - return -EINVAL; - } - - return regmap_write(wcove->regmap, USBC_CONTROL1, ctrl); -} - -static int wcove_set_polarity(struct tcpc_dev *tcpc, enum typec_cc_polarity pol) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - - return wcove_typec_func(wcove, WCOVE_FUNC_ORIENTATION, pol); -} - -static int wcove_set_current_limit(struct tcpc_dev *tcpc, u32 max_ma, u32 mv) -{ - return 0; -} - -static int wcove_set_roles(struct tcpc_dev *tcpc, bool attached, - enum typec_role role, enum typec_data_role data) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - unsigned int val; - int ret; - - ret = wcove_typec_func(wcove, WCOVE_FUNC_ROLE, data == TYPEC_HOST ? - WCOVE_ROLE_HOST : WCOVE_ROLE_DEVICE); - if (ret) - return ret; - - val = role; - val |= data << USBC_PDCFG3_DATAROLE_SHIFT; - val |= PD_REV20 << USBC_PDCFG3_SOP_SHIFT; - - return regmap_write(wcove->regmap, USBC_PDCFG3, val); -} - -static int wcove_set_pd_rx(struct tcpc_dev *tcpc, bool on) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - - return regmap_write(wcove->regmap, USBC_PDCFG2, - on ? USBC_PDCFG2_SOP : 0); -} - -static int wcove_pd_transmit(struct tcpc_dev *tcpc, - enum tcpm_transmit_type type, - const struct pd_message *msg) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - unsigned int info = 0; - unsigned int cmd; - int ret; - - ret = regmap_read(wcove->regmap, USBC_TXCMD, &cmd); - if (ret) - return ret; - - if (!(cmd & USBC_TXCMD_BUF_RDY)) { - dev_warn(wcove->dev, "%s: Last transmission still ongoing!", - __func__); - return -EBUSY; - } - - if (msg) { - const u8 *data = (void *)msg; - int i; - - for (i = 0; i < pd_header_cnt(msg->header) * 4 + 2; i++) { - ret = regmap_write(wcove->regmap, USBC_TX_DATA + i, - data[i]); - if (ret) - return ret; - } - } - - switch (type) { - case TCPC_TX_SOP: - case TCPC_TX_SOP_PRIME: - case TCPC_TX_SOP_PRIME_PRIME: - case TCPC_TX_SOP_DEBUG_PRIME: - case TCPC_TX_SOP_DEBUG_PRIME_PRIME: - info = type + 1; - cmd = USBC_TXCMD_MSG; - break; - case TCPC_TX_HARD_RESET: - cmd = USBC_TXCMD_HR; - break; - case TCPC_TX_CABLE_RESET: - cmd = USBC_TXCMD_CR; - break; - case TCPC_TX_BIST_MODE_2: - cmd = USBC_TXCMD_BIST; - break; - default: - return -EINVAL; - } - - /* NOTE Setting maximum number of retries (7) */ - ret = regmap_write(wcove->regmap, USBC_TXINFO, - info | USBC_TXINFO_RETRIES(7)); - if (ret) - return ret; - - return regmap_write(wcove->regmap, USBC_TXCMD, cmd | USBC_TXCMD_START); -} - -static int wcove_start_drp_toggling(struct tcpc_dev *tcpc, - enum typec_cc_status cc) -{ - struct wcove_typec *wcove = tcpc_to_wcove(tcpc); - unsigned int usbc_ctrl; - - usbc_ctrl = USBC_CONTROL1_MODE_DRP | USBC_CONTROL1_DRPTOGGLE_RANDOM; - - switch (cc) { - case TYPEC_CC_RP_1_5: - usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_180; - break; - case TYPEC_CC_RP_3_0: - usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_330; - break; - default: - usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_80; - break; - } - - return regmap_write(wcove->regmap, USBC_CONTROL1, usbc_ctrl); -} - -static int wcove_read_rx_buffer(struct wcove_typec *wcove, void *msg) -{ - unsigned int info; - int ret; - int i; - - ret = regmap_read(wcove->regmap, USBC_RXINFO, &info); - if (ret) - return ret; - - /* FIXME: Check that USBC_RXINFO_RXBYTES(info) matches the header */ - - for (i = 0; i < USBC_RXINFO_RXBYTES(info); i++) { - ret = regmap_read(wcove->regmap, USBC_RX_DATA + i, msg + i); - if (ret) - return ret; - } - - return regmap_write(wcove->regmap, USBC_RXSTATUS, - USBC_RXSTATUS_RXCLEAR); -} - -static irqreturn_t wcove_typec_irq(int irq, void *data) -{ - struct wcove_typec *wcove = data; - unsigned int usbc_irq1 = 0; - unsigned int usbc_irq2 = 0; - unsigned int cc1ctrl; - int ret; - - mutex_lock(&wcove->lock); - - /* Read.. */ - ret = regmap_read(wcove->regmap, USBC_IRQ1, &usbc_irq1); - if (ret) - goto err; - - ret = regmap_read(wcove->regmap, USBC_IRQ2, &usbc_irq2); - if (ret) - goto err; - - ret = regmap_read(wcove->regmap, USBC_CC1_CTRL, &cc1ctrl); - if (ret) - goto err; - - if (!wcove->tcpm) - goto err; - - /* ..check.. */ - if (usbc_irq1 & USBC_IRQ1_OVERTEMP) { - dev_err(wcove->dev, "VCONN Switch Over Temperature!\n"); - wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, false); - /* REVISIT: Report an error? */ - } - - if (usbc_irq1 & USBC_IRQ1_SHORT) { - dev_err(wcove->dev, "VCONN Switch Short Circuit!\n"); - wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, false); - /* REVISIT: Report an error? */ - } - - if (wcove->vbus != !!(cc1ctrl & USBC_CC_CTRL_VBUSOK)) - tcpm_vbus_change(wcove->tcpm); - - /* REVISIT: See if tcpm code can be made to consider Type-C HW FSMs */ - if (usbc_irq2 & USBC_IRQ2_CC_CHANGE) - tcpm_cc_change(wcove->tcpm); - - if (usbc_irq2 & USBC_IRQ2_RX_PD) { - unsigned int status; - - /* - * FIXME: Need to check if TX is ongoing and report - * TX_DIREGARDED if needed? - */ - - ret = regmap_read(wcove->regmap, USBC_RXSTATUS, &status); - if (ret) - goto err; - - /* Flush all buffers */ - while (status & USBC_RXSTATUS_RXDATA) { - struct pd_message msg; - - ret = wcove_read_rx_buffer(wcove, &msg); - if (ret) { - dev_err(wcove->dev, "%s: RX read failed\n", - __func__); - goto err; - } - - tcpm_pd_receive(wcove->tcpm, &msg); - - ret = regmap_read(wcove->regmap, USBC_RXSTATUS, - &status); - if (ret) - goto err; - } - } - - if (usbc_irq2 & USBC_IRQ2_RX_HR) - tcpm_pd_hard_reset(wcove->tcpm); - - /* REVISIT: if (usbc_irq2 & USBC_IRQ2_RX_CR) */ - - if (usbc_irq2 & USBC_IRQ2_TX_SUCCESS) - tcpm_pd_transmit_complete(wcove->tcpm, TCPC_TX_SUCCESS); - - if (usbc_irq2 & USBC_IRQ2_TX_FAIL) - tcpm_pd_transmit_complete(wcove->tcpm, TCPC_TX_FAILED); - -err: - /* ..and clear. */ - if (usbc_irq1) { - ret = regmap_write(wcove->regmap, USBC_IRQ1, usbc_irq1); - if (ret) - dev_WARN(wcove->dev, "%s failed to clear IRQ1\n", - __func__); - } - - if (usbc_irq2) { - ret = regmap_write(wcove->regmap, USBC_IRQ2, usbc_irq2); - if (ret) - dev_WARN(wcove->dev, "%s failed to clear IRQ2\n", - __func__); - } - - /* REVISIT: Clear WhiskeyCove CHGR Type-C interrupt */ - regmap_write(wcove->regmap, WCOVE_CHGRIRQ0, BIT(5)); - - mutex_unlock(&wcove->lock); - return IRQ_HANDLED; -} - -/* - * The following power levels should be safe to use with Joule board. - */ -static const u32 src_pdo[] = { - PDO_FIXED(5000, 1500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | - PDO_FIXED_USB_COMM), -}; - -static const u32 snk_pdo[] = { - PDO_FIXED(5000, 500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | - PDO_FIXED_USB_COMM), - PDO_VAR(5000, 12000, 3000), -}; - -static struct tcpc_config wcove_typec_config = { - .src_pdo = src_pdo, - .nr_src_pdo = ARRAY_SIZE(src_pdo), - .snk_pdo = snk_pdo, - .nr_snk_pdo = ARRAY_SIZE(snk_pdo), - - .operating_snk_mw = 15000, - - .type = TYPEC_PORT_DRP, - .data = TYPEC_PORT_DRD, - .default_role = TYPEC_SINK, -}; - -static int wcove_typec_probe(struct platform_device *pdev) -{ - struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent); - struct wcove_typec *wcove; - int irq; - int ret; - - wcove = devm_kzalloc(&pdev->dev, sizeof(*wcove), GFP_KERNEL); - if (!wcove) - return -ENOMEM; - - mutex_init(&wcove->lock); - wcove->dev = &pdev->dev; - wcove->regmap = pmic->regmap; - - irq = regmap_irq_get_virq(pmic->irq_chip_data_chgr, - platform_get_irq(pdev, 0)); - if (irq < 0) - return irq; - - ret = guid_parse(WCOVE_DSM_UUID, &wcove->guid); - if (ret) - return ret; - - if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), &wcove->guid, 0, 0x1f)) { - dev_err(&pdev->dev, "Missing _DSM functions\n"); - return -ENODEV; - } - - wcove->tcpc.init = wcove_init; - wcove->tcpc.get_vbus = wcove_get_vbus; - wcove->tcpc.set_vbus = wcove_set_vbus; - wcove->tcpc.set_cc = wcove_set_cc; - wcove->tcpc.get_cc = wcove_get_cc; - wcove->tcpc.set_polarity = wcove_set_polarity; - wcove->tcpc.set_vconn = wcove_set_vconn; - wcove->tcpc.set_current_limit = wcove_set_current_limit; - wcove->tcpc.start_drp_toggling = wcove_start_drp_toggling; - - wcove->tcpc.set_pd_rx = wcove_set_pd_rx; - wcove->tcpc.set_roles = wcove_set_roles; - wcove->tcpc.pd_transmit = wcove_pd_transmit; - - wcove->tcpc.config = &wcove_typec_config; - - wcove->tcpm = tcpm_register_port(wcove->dev, &wcove->tcpc); - if (IS_ERR(wcove->tcpm)) - return PTR_ERR(wcove->tcpm); - - ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, - wcove_typec_irq, IRQF_ONESHOT, - "wcove_typec", wcove); - if (ret) { - tcpm_unregister_port(wcove->tcpm); - return ret; - } - - platform_set_drvdata(pdev, wcove); - return 0; -} - -static int wcove_typec_remove(struct platform_device *pdev) -{ - struct wcove_typec *wcove = platform_get_drvdata(pdev); - unsigned int val; - - /* Mask everything */ - regmap_read(wcove->regmap, USBC_IRQMASK1, &val); - regmap_write(wcove->regmap, USBC_IRQMASK1, val | USBC_IRQMASK1_ALL); - regmap_read(wcove->regmap, USBC_IRQMASK2, &val); - regmap_write(wcove->regmap, USBC_IRQMASK2, val | USBC_IRQMASK2_ALL); - - tcpm_unregister_port(wcove->tcpm); - - return 0; -} - -static struct platform_driver wcove_typec_driver = { - .driver = { - .name = "bxt_wcove_usbc", - }, - .probe = wcove_typec_probe, - .remove = wcove_typec_remove, -}; - -module_platform_driver(wcove_typec_driver); - -MODULE_AUTHOR("Intel Corporation"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("WhiskeyCove PMIC USB Type-C PHY driver"); -MODULE_ALIAS("platform:bxt_wcove_usbc");