F: drivers/usb/typec/altmodes/
F: include/linux/usb/typec_altmode.h
+USB TYPEC PORT CONTROLLER DRIVERS
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/typec/tcpm/
+
USB UHCI DRIVER
M: Alan Stern <stern@rowland.harvard.edu>
L: linux-usb@vger.kernel.org
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"
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
+++ /dev/null
-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.
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_TYPEC_FUSB302) += fusb302.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright 2016-2017 Google, Inc
- *
- * Fairchild FUSB302 Type-C Chip Driver
- */
-
-#include <linux/debugfs.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/extcon.h>
-#include <linux/gpio.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of_device.h>
-#include <linux/of_gpio.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/proc_fs.h>
-#include <linux/regulator/consumer.h>
-#include <linux/sched/clock.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/usb/typec.h>
-#include <linux/usb/tcpm.h>
-#include <linux/usb/pd.h>
-#include <linux/workqueue.h>
-
-#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 <yueyao.zhu@gmail.com>");
-MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// 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
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright 2015-2017 Google, Inc
- *
- * USB Type-C Port Controller Interface.
- */
-
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/property.h>
-#include <linux/regmap.h>
-#include <linux/usb/pd.h>
-#include <linux/usb/tcpm.h>
-#include <linux/usb/typec.h>
-
-#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");
+++ /dev/null
-/* 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 */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2018, Richtek Technology Corporation
- *
- * Richtek RT1711H Type-C Chip Driver
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/gpio/consumer.h>
-#include <linux/usb/tcpm.h>
-#include <linux/regmap.h>
-#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 <shufan_lee@richtek.com>");
-MODULE_DESCRIPTION("RT1711H USB Type-C Port Controller Interface Driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright 2015-2017 Google, Inc
- *
- * USB Power Delivery protocol stack.
- */
-
-#include <linux/completion.h>
-#include <linux/debugfs.h>
-#include <linux/device.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/power_supply.h>
-#include <linux/proc_fs.h>
-#include <linux/property.h>
-#include <linux/sched/clock.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/usb/pd.h>
-#include <linux/usb/pd_ado.h>
-#include <linux/usb/pd_bdo.h>
-#include <linux/usb/pd_ext_sdb.h>
-#include <linux/usb/pd_vdo.h>
-#include <linux/usb/role.h>
-#include <linux/usb/tcpm.h>
-#include <linux/usb/typec_altmode.h>
-#include <linux/workqueue.h>
-
-#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 <groeck@chromium.org>");
-MODULE_DESCRIPTION("USB Type-C Port Manager");
-MODULE_LICENSE("GPL");
--- /dev/null
+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
--- /dev/null
+# 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
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2016-2017 Google, Inc
+ *
+ * Fairchild FUSB302 Type-C Chip Driver
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/extcon.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/proc_fs.h>
+#include <linux/regulator/consumer.h>
+#include <linux/sched/clock.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/usb/typec.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/pd.h>
+#include <linux/workqueue.h>
+
+#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 <yueyao.zhu@gmail.com>");
+MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+// 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
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * USB Type-C Port Controller Interface.
+ */
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/usb/pd.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/typec.h>
+
+#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");
--- /dev/null
+/* 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 */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Richtek Technology Corporation
+ *
+ * Richtek RT1711H Type-C Chip Driver
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
+#include <linux/usb/tcpm.h>
+#include <linux/regmap.h>
+#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 <shufan_lee@richtek.com>");
+MODULE_DESCRIPTION("RT1711H USB Type-C Port Controller Interface Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * USB Power Delivery protocol stack.
+ */
+
+#include <linux/completion.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/power_supply.h>
+#include <linux/proc_fs.h>
+#include <linux/property.h>
+#include <linux/sched/clock.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/usb/pd.h>
+#include <linux/usb/pd_ado.h>
+#include <linux/usb/pd_bdo.h>
+#include <linux/usb/pd_ext_sdb.h>
+#include <linux/usb/pd_vdo.h>
+#include <linux/usb/role.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/typec_altmode.h>
+#include <linux/workqueue.h>
+
+#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 <groeck@chromium.org>");
+MODULE_DESCRIPTION("USB Type-C Port Manager");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * typec_wcove.c - WhiskeyCove PMIC USB Type-C PHY driver
+ *
+ * Copyright (C) 2017 Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/module.h>
+#include <linux/usb/tcpm.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/intel_soc_pmic.h>
+
+/* 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");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/**
- * typec_wcove.c - WhiskeyCove PMIC USB Type-C PHY driver
- *
- * Copyright (C) 2017 Intel Corporation
- * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
- */
-
-#include <linux/acpi.h>
-#include <linux/module.h>
-#include <linux/usb/tcpm.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/mfd/intel_soc_pmic.h>
-
-/* 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");
projects / openwrt / staging / blogic.git / commitdiff