--- /dev/null
+/*
+ * max8997-muic.c - MAX8997 muic driver for the Maxim 8997
+ *
+ * Copyright (C) 2011 Samsung Electrnoics
+ * Donggeun Kim <dg77.kim@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/kobject.h>
+#include <linux/mfd/max8997.h>
+#include <linux/mfd/max8997-private.h>
+
+/* MAX8997-MUIC STATUS1 register */
+#define STATUS1_ADC_SHIFT 0
+#define STATUS1_ADCLOW_SHIFT 5
+#define STATUS1_ADCERR_SHIFT 6
+#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
+#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
+#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
+
+/* MAX8997-MUIC STATUS2 register */
+#define STATUS2_CHGTYP_SHIFT 0
+#define STATUS2_CHGDETRUN_SHIFT 3
+#define STATUS2_DCDTMR_SHIFT 4
+#define STATUS2_DBCHG_SHIFT 5
+#define STATUS2_VBVOLT_SHIFT 6
+#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
+#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
+#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
+#define STATUS2_DBCHG_MASK (0x1 << STATUS2_DBCHG_SHIFT)
+#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
+
+/* MAX8997-MUIC STATUS3 register */
+#define STATUS3_OVP_SHIFT 2
+#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
+
+/* MAX8997-MUIC CONTROL1 register */
+#define COMN1SW_SHIFT 0
+#define COMP2SW_SHIFT 3
+#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
+#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
+#define SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
+
+#define MAX8997_SW_USB ((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
+#define MAX8997_SW_AUDIO ((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
+#define MAX8997_SW_UART ((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
+#define MAX8997_SW_OPEN ((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))
+
+#define MAX8997_ADC_GROUND 0x00
+#define MAX8997_ADC_MHL 0x01
+#define MAX8997_ADC_JIG_USB_1 0x18
+#define MAX8997_ADC_JIG_USB_2 0x19
+#define MAX8997_ADC_DESKDOCK 0x1a
+#define MAX8997_ADC_JIG_UART 0x1c
+#define MAX8997_ADC_CARDOCK 0x1d
+#define MAX8997_ADC_OPEN 0x1f
+
+struct max8997_muic_irq {
+ unsigned int irq;
+ const char *name;
+};
+
+static struct max8997_muic_irq muic_irqs[] = {
+ { MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
+ { MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
+ { MAX8997_MUICIRQ_ADC, "muic-ADC" },
+ { MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
+ { MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
+ { MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
+ { MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
+ { MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
+ { MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
+};
+
+struct max8997_muic_info {
+ struct device *dev;
+ struct max8997_dev *iodev;
+ struct i2c_client *muic;
+ struct max8997_muic_platform_data *muic_pdata;
+
+ int irq;
+ struct work_struct irq_work;
+
+ enum max8997_muic_charger_type pre_charger_type;
+ int pre_adc;
+
+ struct mutex mutex;
+};
+
+static int max8997_muic_handle_usb(struct max8997_muic_info *info,
+ enum max8997_muic_usb_type usb_type, bool attached)
+{
+ struct max8997_muic_platform_data *mdata = info->muic_pdata;
+ int ret = 0;
+
+ if (usb_type == MAX8997_USB_HOST) {
+ /* switch to USB */
+ ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
+ attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
+ SW_MASK);
+ if (ret) {
+ dev_err(info->dev, "failed to update muic register\n");
+ goto out;
+ }
+ }
+
+ if (mdata->usb_callback)
+ mdata->usb_callback(usb_type, attached);
+out:
+ return ret;
+}
+
+static void max8997_muic_handle_mhl(struct max8997_muic_info *info,
+ bool attached)
+{
+ struct max8997_muic_platform_data *mdata = info->muic_pdata;
+
+ if (mdata->mhl_callback)
+ mdata->mhl_callback(attached);
+}
+
+static int max8997_muic_handle_dock(struct max8997_muic_info *info,
+ int adc, bool attached)
+{
+ struct max8997_muic_platform_data *mdata = info->muic_pdata;
+ int ret = 0;
+
+ /* switch to AUDIO */
+ ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
+ attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
+ SW_MASK);
+ if (ret) {
+ dev_err(info->dev, "failed to update muic register\n");
+ goto out;
+ }
+
+ switch (adc) {
+ case MAX8997_ADC_DESKDOCK:
+ if (mdata->deskdock_callback)
+ mdata->deskdock_callback(attached);
+ break;
+ case MAX8997_ADC_CARDOCK:
+ if (mdata->cardock_callback)
+ mdata->cardock_callback(attached);
+ break;
+ default:
+ break;
+ }
+out:
+ return ret;
+}
+
+static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
+ bool attached)
+{
+ struct max8997_muic_platform_data *mdata = info->muic_pdata;
+ int ret = 0;
+
+ /* switch to UART */
+ ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
+ attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
+ SW_MASK);
+ if (ret) {
+ dev_err(info->dev, "failed to update muic register\n");
+ goto out;
+ }
+
+ if (mdata->uart_callback)
+ mdata->uart_callback(attached);
+out:
+ return ret;
+}
+
+static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
+{
+ int ret = 0;
+
+ switch (info->pre_adc) {
+ case MAX8997_ADC_GROUND:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
+ break;
+ case MAX8997_ADC_MHL:
+ max8997_muic_handle_mhl(info, false);
+ break;
+ case MAX8997_ADC_JIG_USB_1:
+ case MAX8997_ADC_JIG_USB_2:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
+ break;
+ case MAX8997_ADC_DESKDOCK:
+ case MAX8997_ADC_CARDOCK:
+ ret = max8997_muic_handle_dock(info, info->pre_adc, false);
+ break;
+ case MAX8997_ADC_JIG_UART:
+ ret = max8997_muic_handle_jig_uart(info, false);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
+{
+ int ret = 0;
+
+ switch (adc) {
+ case MAX8997_ADC_GROUND:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
+ break;
+ case MAX8997_ADC_MHL:
+ max8997_muic_handle_mhl(info, true);
+ break;
+ case MAX8997_ADC_JIG_USB_1:
+ case MAX8997_ADC_JIG_USB_2:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
+ break;
+ case MAX8997_ADC_DESKDOCK:
+ case MAX8997_ADC_CARDOCK:
+ ret = max8997_muic_handle_dock(info, adc, true);
+ break;
+ case MAX8997_ADC_JIG_UART:
+ ret = max8997_muic_handle_jig_uart(info, true);
+ break;
+ case MAX8997_ADC_OPEN:
+ ret = max8997_muic_handle_adc_detach(info);
+ break;
+ default:
+ break;
+ }
+
+ info->pre_adc = adc;
+
+ return ret;
+}
+
+static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
+ enum max8997_muic_charger_type charger_type)
+{
+ struct max8997_muic_platform_data *mdata = info->muic_pdata;
+ u8 adc;
+ int ret;
+
+ ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
+ if (ret) {
+ dev_err(info->dev, "failed to read muic register\n");
+ goto out;
+ }
+
+ switch (charger_type) {
+ case MAX8997_CHARGER_TYPE_NONE:
+ if (mdata->charger_callback)
+ mdata->charger_callback(false, charger_type);
+ if (info->pre_charger_type == MAX8997_CHARGER_TYPE_USB) {
+ max8997_muic_handle_usb(info,
+ MAX8997_USB_DEVICE, false);
+ }
+ break;
+ case MAX8997_CHARGER_TYPE_USB:
+ if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
+ max8997_muic_handle_usb(info,
+ MAX8997_USB_DEVICE, true);
+ }
+ if (mdata->charger_callback)
+ mdata->charger_callback(true, charger_type);
+ break;
+ case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
+ case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
+ case MAX8997_CHARGER_TYPE_500MA:
+ case MAX8997_CHARGER_TYPE_1A:
+ if (mdata->charger_callback)
+ mdata->charger_callback(true, charger_type);
+ break;
+ default:
+ break;
+ }
+
+ info->pre_charger_type = charger_type;
+out:
+ return ret;
+}
+
+static void max8997_muic_irq_work(struct work_struct *work)
+{
+ struct max8997_muic_info *info = container_of(work,
+ struct max8997_muic_info, irq_work);
+ struct max8997_platform_data *pdata =
+ dev_get_platdata(info->iodev->dev);
+ char env_name_str[30], env_state_str[15];
+ char *envp[] = { env_name_str, env_state_str, NULL };
+ u8 status[3];
+ u8 adc, adc_low, adc_err;
+ u8 vb_volt, db_chg, dcd_tmr, cdr, chg_type, ovp;
+
+ int irq_type = info->irq - pdata->irq_base;
+ int ret;
+
+ mutex_lock(&info->mutex);
+
+ ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
+ 3, status);
+ if (ret) {
+ dev_err(info->dev, "failed to read muic register\n");
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
+ status[0], status[1]);
+
+ switch (irq_type) {
+ case MAX8997_MUICIRQ_ADCError:
+ adc_err = status[0] & STATUS1_ADCERR_MASK;
+ adc_err >>= STATUS1_ADCERR_SHIFT;
+ sprintf(env_name_str, "IRQ=%s", "ADC_Error");
+ sprintf(env_state_str, "STATE=%d", adc_err);
+ break;
+ case MAX8997_MUICIRQ_ADCLow:
+ adc_low = status[0] & STATUS1_ADCLOW_MASK;
+ adc_low >>= STATUS1_ADCLOW_SHIFT;
+ sprintf(env_name_str, "IRQ=%s", "ADC_Low");
+ sprintf(env_state_str, "STATE=%d", adc_low);
+ break;
+ case MAX8997_MUICIRQ_ADC:
+ adc = status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ max8997_muic_handle_adc(info, adc);
+
+ sprintf(env_name_str, "IRQ=%s", "ADC");
+ sprintf(env_state_str, "STATE=%d", adc);
+ break;
+ case MAX8997_MUICIRQ_VBVolt:
+ vb_volt = status[1] & STATUS2_VBVOLT_MASK;
+ vb_volt >>= STATUS2_VBVOLT_SHIFT;
+ sprintf(env_name_str, "IRQ=%s", "VB_Volt");
+ sprintf(env_state_str, "STATE=%d", vb_volt);
+ break;
+ case MAX8997_MUICIRQ_DBChg:
+ db_chg = status[1] & STATUS2_DBCHG_MASK;
+ db_chg >>= STATUS2_DBCHG_SHIFT;
+ sprintf(env_name_str, "IRQ=%s", "DB_CHARGER");
+ sprintf(env_state_str, "STATE=%d", db_chg);
+ break;
+ case MAX8997_MUICIRQ_DCDTmr:
+ dcd_tmr = status[1] & STATUS2_DCDTMR_MASK;
+ dcd_tmr >>= STATUS2_DCDTMR_SHIFT;
+ sprintf(env_name_str, "IRQ=%s", "DCD_TIMER");
+ sprintf(env_state_str, "STATE=%d", dcd_tmr);
+ break;
+ case MAX8997_MUICIRQ_ChgDetRun:
+ cdr = status[1] & STATUS2_CHGDETRUN_MASK;
+ cdr >>= STATUS2_CHGDETRUN_SHIFT;
+ sprintf(env_name_str, "IRQ=%s", "CHG_DET_RUN");
+ sprintf(env_state_str, "STATE=%d", cdr);
+ break;
+ case MAX8997_MUICIRQ_ChgTyp:
+ chg_type = status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ max8997_muic_handle_charger_type(info, chg_type);
+
+ sprintf(env_name_str, "IRQ=%s", "CHARGER_TYPE");
+ sprintf(env_state_str, "STATE=%d", chg_type);
+ break;
+ case MAX8997_MUICIRQ_OVP:
+ ovp = status[2] & STATUS3_OVP_MASK;
+ ovp >>= STATUS3_OVP_SHIFT;
+ sprintf(env_name_str, "IRQ=%s", "OVER-VOLTAGE");
+ sprintf(env_state_str, "STATE=%d", ovp);
+ break;
+ default:
+ break;
+ }
+
+ kobject_uevent_env(&info->dev->kobj, KOBJ_CHANGE, envp);
+
+ mutex_unlock(&info->mutex);
+
+ return;
+}
+
+static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
+{
+ struct max8997_muic_info *info = data;
+
+ dev_dbg(info->dev, "irq:%d\n", irq);
+ info->irq = irq;
+
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static void max8997_muic_detect_dev(struct max8997_muic_info *info)
+{
+ int ret;
+ u8 status[2], adc, chg_type;
+
+ ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
+ 2, status);
+ if (ret) {
+ dev_err(info->dev, "failed to read muic register\n");
+ return;
+ }
+
+ dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
+ status[0], status[1]);
+
+ adc = status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ chg_type = status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ max8997_muic_handle_adc(info, adc);
+ max8997_muic_handle_charger_type(info, chg_type);
+}
+
+static ssize_t max8997_muic_show_manualsw(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct max8997_muic_info *info = dev_get_drvdata(dev);
+ int ret;
+ u8 value, manual_switch;
+
+ ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_CONTROL1, &value);
+ if (ret) {
+ dev_err(info->dev, "failed to read muic register\n");
+ return sprintf(buf, "UNKNOWN\n");
+ }
+
+ manual_switch = value & (COMN1SW_MASK | COMP2SW_MASK);
+
+ switch (manual_switch) {
+ case MAX8997_SW_USB:
+ return sprintf(buf, "USB\n");
+ case MAX8997_SW_AUDIO:
+ return sprintf(buf, "AUDIO\n");
+ case MAX8997_SW_UART:
+ return sprintf(buf, "UART\n");
+ default:
+ return sprintf(buf, "OPEN\n");
+ }
+}
+
+static ssize_t max8997_muic_store_manualsw(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct max8997_muic_info *info = dev_get_drvdata(dev);
+ int ret;
+ u8 manual_switch;
+
+ if (!strncmp(buf, "USB", 3)) {
+ manual_switch = MAX8997_SW_USB;
+ } else if (!strncmp(buf, "AUDIO", 5)) {
+ manual_switch = MAX8997_SW_AUDIO;
+ } else if (!strncmp(buf, "UART", 4)) {
+ manual_switch = MAX8997_SW_UART;
+ } else if (!strncmp(buf, "OPEN", 4)) {
+ manual_switch = MAX8997_SW_OPEN;
+ } else {
+ dev_err(info->dev, "invalid parameter\n");
+ goto out;
+ }
+
+ ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
+ manual_switch, SW_MASK);
+ if (ret)
+ dev_err(info->dev, "failed to update muic register\n");
+out:
+ return count;
+}
+
+static DEVICE_ATTR(switch, S_IRUGO | S_IWUSR,
+ max8997_muic_show_manualsw, max8997_muic_store_manualsw);
+
+static struct attribute *max8997_muic_attributes[] = {
+ &dev_attr_switch.attr,
+ NULL
+};
+
+static const struct attribute_group max8997_muic_group = {
+ .attrs = max8997_muic_attributes,
+};
+
+static void max8997_initialize_device(struct max8997_muic_info *info)
+{
+ struct max8997_muic_platform_data *mdata = info->muic_pdata;
+ int i;
+
+ for (i = 0; i < mdata->num_init_data; i++) {
+ max8997_write_reg(info->muic, mdata->init_data[i].addr,
+ mdata->init_data[i].data);
+ }
+}
+
+static int __devinit max8997_muic_probe(struct platform_device *pdev)
+{
+ struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
+ struct max8997_muic_info *info;
+ int ret, i;
+
+ info = kzalloc(sizeof(struct max8997_muic_info), GFP_KERNEL);
+ if (!info) {
+ dev_err(&pdev->dev, "failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto err_kfree;
+ }
+
+ if (!pdata->muic_pdata) {
+ dev_err(&pdev->dev, "failed to get platform_data\n");
+ ret = -EINVAL;
+ goto err_pdata;
+ }
+ info->muic_pdata = pdata->muic_pdata;
+
+ info->dev = &pdev->dev;
+ info->iodev = iodev;
+ info->muic = iodev->muic;
+
+ platform_set_drvdata(pdev, info);
+ mutex_init(&info->mutex);
+
+ ret = sysfs_create_group(&pdev->dev.kobj, &max8997_muic_group);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed to create max8997 muic attribute group\n");
+ goto err_sysfs;
+ }
+
+ INIT_WORK(&info->irq_work, max8997_muic_irq_work);
+
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
+ struct max8997_muic_irq *muic_irq = &muic_irqs[i];
+
+ ret = request_threaded_irq(pdata->irq_base + muic_irq->irq,
+ NULL, max8997_muic_irq_handler,
+ 0, muic_irq->name,
+ info);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed: irq request (IRQ: %d,"
+ " error :%d)\n",
+ muic_irq->irq, ret);
+
+ for (i = i - 1; i >= 0; i--)
+ free_irq(muic_irq->irq, info);
+
+ goto err_irq;
+ }
+ }
+
+ /* Initialize registers according to platform data */
+ max8997_initialize_device(info);
+
+ /* Initial device detection */
+ max8997_muic_detect_dev(info);
+
+ return ret;
+
+err_irq:
+ sysfs_remove_group(&pdev->dev.kobj, &max8997_muic_group);
+err_sysfs:
+err_pdata:
+ kfree(info);
+err_kfree:
+ return ret;
+}
+
+static int __devexit max8997_muic_remove(struct platform_device *pdev)
+{
+ struct max8997_muic_info *info = platform_get_drvdata(pdev);
+ struct max8997_platform_data *pdata =
+ dev_get_platdata(info->iodev->dev);
+ int i;
+
+ sysfs_remove_group(&pdev->dev.kobj, &max8997_muic_group);
+
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
+ free_irq(pdata->irq_base + muic_irqs[i].irq, info);
+
+ kfree(info);
+
+ return 0;
+}
+
+static struct platform_driver max8997_muic_driver = {
+ .driver = {
+ .name = "max8997-muic",
+ .owner = THIS_MODULE,
+ },
+ .probe = max8997_muic_probe,
+ .remove = __devexit_p(max8997_muic_remove),
+};
+
+static int __init max8997_muic_init(void)
+{
+ return platform_driver_register(&max8997_muic_driver);
+}
+module_init(max8997_muic_init);
+
+static void __exit max8997_muic_exit(void)
+{
+ platform_driver_unregister(&max8997_muic_driver);
+}
+module_exit(max8997_muic_exit);
+
+MODULE_DESCRIPTION("Maxim MAX8997 MUIC driver");
+MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
+MODULE_LICENSE("GPL");
projects / openwrt / staging / blogic.git / commitdiff