From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/misc/fsa9480.c | 549 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 549 insertions(+) create mode 100644 drivers/misc/fsa9480.c (limited to 'drivers/misc/fsa9480.c') diff --git a/drivers/misc/fsa9480.c b/drivers/misc/fsa9480.c new file mode 100644 index 000000000..71d2793b3 --- /dev/null +++ b/drivers/misc/fsa9480.c @@ -0,0 +1,549 @@ +/* + * fsa9480.c - FSA9480 micro USB switch device driver + * + * Copyright (C) 2010 Samsung Electronics + * Minkyu Kang + * Wonguk Jeong + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* FSA9480 I2C registers */ +#define FSA9480_REG_DEVID 0x01 +#define FSA9480_REG_CTRL 0x02 +#define FSA9480_REG_INT1 0x03 +#define FSA9480_REG_INT2 0x04 +#define FSA9480_REG_INT1_MASK 0x05 +#define FSA9480_REG_INT2_MASK 0x06 +#define FSA9480_REG_ADC 0x07 +#define FSA9480_REG_TIMING1 0x08 +#define FSA9480_REG_TIMING2 0x09 +#define FSA9480_REG_DEV_T1 0x0a +#define FSA9480_REG_DEV_T2 0x0b +#define FSA9480_REG_BTN1 0x0c +#define FSA9480_REG_BTN2 0x0d +#define FSA9480_REG_CK 0x0e +#define FSA9480_REG_CK_INT1 0x0f +#define FSA9480_REG_CK_INT2 0x10 +#define FSA9480_REG_CK_INTMASK1 0x11 +#define FSA9480_REG_CK_INTMASK2 0x12 +#define FSA9480_REG_MANSW1 0x13 +#define FSA9480_REG_MANSW2 0x14 + +/* Control */ +#define CON_SWITCH_OPEN (1 << 4) +#define CON_RAW_DATA (1 << 3) +#define CON_MANUAL_SW (1 << 2) +#define CON_WAIT (1 << 1) +#define CON_INT_MASK (1 << 0) +#define CON_MASK (CON_SWITCH_OPEN | CON_RAW_DATA | \ + CON_MANUAL_SW | CON_WAIT) + +/* Device Type 1 */ +#define DEV_USB_OTG (1 << 7) +#define DEV_DEDICATED_CHG (1 << 6) +#define DEV_USB_CHG (1 << 5) +#define DEV_CAR_KIT (1 << 4) +#define DEV_UART (1 << 3) +#define DEV_USB (1 << 2) +#define DEV_AUDIO_2 (1 << 1) +#define DEV_AUDIO_1 (1 << 0) + +#define DEV_T1_USB_MASK (DEV_USB_OTG | DEV_USB) +#define DEV_T1_UART_MASK (DEV_UART) +#define DEV_T1_CHARGER_MASK (DEV_DEDICATED_CHG | DEV_USB_CHG) + +/* Device Type 2 */ +#define DEV_AV (1 << 6) +#define DEV_TTY (1 << 5) +#define DEV_PPD (1 << 4) +#define DEV_JIG_UART_OFF (1 << 3) +#define DEV_JIG_UART_ON (1 << 2) +#define DEV_JIG_USB_OFF (1 << 1) +#define DEV_JIG_USB_ON (1 << 0) + +#define DEV_T2_USB_MASK (DEV_JIG_USB_OFF | DEV_JIG_USB_ON) +#define DEV_T2_UART_MASK (DEV_JIG_UART_OFF | DEV_JIG_UART_ON) +#define DEV_T2_JIG_MASK (DEV_JIG_USB_OFF | DEV_JIG_USB_ON | \ + DEV_JIG_UART_OFF | DEV_JIG_UART_ON) + +/* + * Manual Switch + * D- [7:5] / D+ [4:2] + * 000: Open all / 001: USB / 010: AUDIO / 011: UART / 100: V_AUDIO + */ +#define SW_VAUDIO ((4 << 5) | (4 << 2)) +#define SW_UART ((3 << 5) | (3 << 2)) +#define SW_AUDIO ((2 << 5) | (2 << 2)) +#define SW_DHOST ((1 << 5) | (1 << 2)) +#define SW_AUTO ((0 << 5) | (0 << 2)) + +/* Interrupt 1 */ +#define INT_DETACH (1 << 1) +#define INT_ATTACH (1 << 0) + +struct fsa9480_usbsw { + struct i2c_client *client; + struct fsa9480_platform_data *pdata; + int dev1; + int dev2; + int mansw; +}; + +static struct fsa9480_usbsw *chip; + +static int fsa9480_write_reg(struct i2c_client *client, + int reg, int value) +{ + int ret; + + ret = i2c_smbus_write_byte_data(client, reg, value); + + if (ret < 0) + dev_err(&client->dev, "%s: err %d\n", __func__, ret); + + return ret; +} + +static int fsa9480_read_reg(struct i2c_client *client, int reg) +{ + int ret; + + ret = i2c_smbus_read_byte_data(client, reg); + + if (ret < 0) + dev_err(&client->dev, "%s: err %d\n", __func__, ret); + + return ret; +} + +static int fsa9480_read_irq(struct i2c_client *client, int *value) +{ + int ret; + + ret = i2c_smbus_read_i2c_block_data(client, + FSA9480_REG_INT1, 2, (u8 *)value); + *value &= 0xffff; + + if (ret < 0) + dev_err(&client->dev, "%s: err %d\n", __func__, ret); + + return ret; +} + +static void fsa9480_set_switch(const char *buf) +{ + struct fsa9480_usbsw *usbsw = chip; + struct i2c_client *client = usbsw->client; + unsigned int value; + unsigned int path = 0; + + value = fsa9480_read_reg(client, FSA9480_REG_CTRL); + + if (!strncmp(buf, "VAUDIO", 6)) { + path = SW_VAUDIO; + value &= ~CON_MANUAL_SW; + } else if (!strncmp(buf, "UART", 4)) { + path = SW_UART; + value &= ~CON_MANUAL_SW; + } else if (!strncmp(buf, "AUDIO", 5)) { + path = SW_AUDIO; + value &= ~CON_MANUAL_SW; + } else if (!strncmp(buf, "DHOST", 5)) { + path = SW_DHOST; + value &= ~CON_MANUAL_SW; + } else if (!strncmp(buf, "AUTO", 4)) { + path = SW_AUTO; + value |= CON_MANUAL_SW; + } else { + printk(KERN_ERR "Wrong command\n"); + return; + } + + usbsw->mansw = path; + fsa9480_write_reg(client, FSA9480_REG_MANSW1, path); + fsa9480_write_reg(client, FSA9480_REG_CTRL, value); +} + +static ssize_t fsa9480_get_switch(char *buf) +{ + struct fsa9480_usbsw *usbsw = chip; + struct i2c_client *client = usbsw->client; + unsigned int value; + + value = fsa9480_read_reg(client, FSA9480_REG_MANSW1); + + if (value == SW_VAUDIO) + return sprintf(buf, "VAUDIO\n"); + else if (value == SW_UART) + return sprintf(buf, "UART\n"); + else if (value == SW_AUDIO) + return sprintf(buf, "AUDIO\n"); + else if (value == SW_DHOST) + return sprintf(buf, "DHOST\n"); + else if (value == SW_AUTO) + return sprintf(buf, "AUTO\n"); + else + return sprintf(buf, "%x", value); +} + +static ssize_t fsa9480_show_device(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct fsa9480_usbsw *usbsw = dev_get_drvdata(dev); + struct i2c_client *client = usbsw->client; + int dev1, dev2; + + dev1 = fsa9480_read_reg(client, FSA9480_REG_DEV_T1); + dev2 = fsa9480_read_reg(client, FSA9480_REG_DEV_T2); + + if (!dev1 && !dev2) + return sprintf(buf, "NONE\n"); + + /* USB */ + if (dev1 & DEV_T1_USB_MASK || dev2 & DEV_T2_USB_MASK) + return sprintf(buf, "USB\n"); + + /* UART */ + if (dev1 & DEV_T1_UART_MASK || dev2 & DEV_T2_UART_MASK) + return sprintf(buf, "UART\n"); + + /* CHARGER */ + if (dev1 & DEV_T1_CHARGER_MASK) + return sprintf(buf, "CHARGER\n"); + + /* JIG */ + if (dev2 & DEV_T2_JIG_MASK) + return sprintf(buf, "JIG\n"); + + return sprintf(buf, "UNKNOWN\n"); +} + +static ssize_t fsa9480_show_manualsw(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return fsa9480_get_switch(buf); + +} + +static ssize_t fsa9480_set_manualsw(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + fsa9480_set_switch(buf); + + return count; +} + +static DEVICE_ATTR(device, S_IRUGO, fsa9480_show_device, NULL); +static DEVICE_ATTR(switch, S_IRUGO | S_IWUSR, + fsa9480_show_manualsw, fsa9480_set_manualsw); + +static struct attribute *fsa9480_attributes[] = { + &dev_attr_device.attr, + &dev_attr_switch.attr, + NULL +}; + +static const struct attribute_group fsa9480_group = { + .attrs = fsa9480_attributes, +}; + +static void fsa9480_detect_dev(struct fsa9480_usbsw *usbsw, int intr) +{ + int val1, val2, ctrl; + struct fsa9480_platform_data *pdata = usbsw->pdata; + struct i2c_client *client = usbsw->client; + + val1 = fsa9480_read_reg(client, FSA9480_REG_DEV_T1); + val2 = fsa9480_read_reg(client, FSA9480_REG_DEV_T2); + ctrl = fsa9480_read_reg(client, FSA9480_REG_CTRL); + + dev_info(&client->dev, "intr: 0x%x, dev1: 0x%x, dev2: 0x%x\n", + intr, val1, val2); + + if (!intr) + goto out; + + if (intr & INT_ATTACH) { /* Attached */ + /* USB */ + if (val1 & DEV_T1_USB_MASK || val2 & DEV_T2_USB_MASK) { + if (pdata->usb_cb) + pdata->usb_cb(FSA9480_ATTACHED); + + if (usbsw->mansw) { + fsa9480_write_reg(client, + FSA9480_REG_MANSW1, usbsw->mansw); + } + } + + /* UART */ + if (val1 & DEV_T1_UART_MASK || val2 & DEV_T2_UART_MASK) { + if (pdata->uart_cb) + pdata->uart_cb(FSA9480_ATTACHED); + + if (!(ctrl & CON_MANUAL_SW)) { + fsa9480_write_reg(client, + FSA9480_REG_MANSW1, SW_UART); + } + } + + /* CHARGER */ + if (val1 & DEV_T1_CHARGER_MASK) { + if (pdata->charger_cb) + pdata->charger_cb(FSA9480_ATTACHED); + } + + /* JIG */ + if (val2 & DEV_T2_JIG_MASK) { + if (pdata->jig_cb) + pdata->jig_cb(FSA9480_ATTACHED); + } + } else if (intr & INT_DETACH) { /* Detached */ + /* USB */ + if (usbsw->dev1 & DEV_T1_USB_MASK || + usbsw->dev2 & DEV_T2_USB_MASK) { + if (pdata->usb_cb) + pdata->usb_cb(FSA9480_DETACHED); + } + + /* UART */ + if (usbsw->dev1 & DEV_T1_UART_MASK || + usbsw->dev2 & DEV_T2_UART_MASK) { + if (pdata->uart_cb) + pdata->uart_cb(FSA9480_DETACHED); + } + + /* CHARGER */ + if (usbsw->dev1 & DEV_T1_CHARGER_MASK) { + if (pdata->charger_cb) + pdata->charger_cb(FSA9480_DETACHED); + } + + /* JIG */ + if (usbsw->dev2 & DEV_T2_JIG_MASK) { + if (pdata->jig_cb) + pdata->jig_cb(FSA9480_DETACHED); + } + } + + usbsw->dev1 = val1; + usbsw->dev2 = val2; + +out: + ctrl &= ~CON_INT_MASK; + fsa9480_write_reg(client, FSA9480_REG_CTRL, ctrl); +} + +static irqreturn_t fsa9480_irq_handler(int irq, void *data) +{ + struct fsa9480_usbsw *usbsw = data; + struct i2c_client *client = usbsw->client; + int intr; + + /* clear interrupt */ + fsa9480_read_irq(client, &intr); + + /* device detection */ + fsa9480_detect_dev(usbsw, intr); + + return IRQ_HANDLED; +} + +static int fsa9480_irq_init(struct fsa9480_usbsw *usbsw) +{ + struct fsa9480_platform_data *pdata = usbsw->pdata; + struct i2c_client *client = usbsw->client; + int ret; + int intr; + unsigned int ctrl = CON_MASK; + + /* clear interrupt */ + fsa9480_read_irq(client, &intr); + + /* unmask interrupt (attach/detach only) */ + fsa9480_write_reg(client, FSA9480_REG_INT1_MASK, 0xfc); + fsa9480_write_reg(client, FSA9480_REG_INT2_MASK, 0x1f); + + usbsw->mansw = fsa9480_read_reg(client, FSA9480_REG_MANSW1); + + if (usbsw->mansw) + ctrl &= ~CON_MANUAL_SW; /* Manual Switching Mode */ + + fsa9480_write_reg(client, FSA9480_REG_CTRL, ctrl); + + if (pdata && pdata->cfg_gpio) + pdata->cfg_gpio(); + + if (client->irq) { + ret = request_threaded_irq(client->irq, NULL, + fsa9480_irq_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + "fsa9480 micro USB", usbsw); + if (ret) { + dev_err(&client->dev, "failed to request IRQ\n"); + return ret; + } + + if (pdata) + device_init_wakeup(&client->dev, pdata->wakeup); + } + + return 0; +} + +static int fsa9480_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct fsa9480_usbsw *usbsw; + int ret = 0; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -EIO; + + usbsw = kzalloc(sizeof(struct fsa9480_usbsw), GFP_KERNEL); + if (!usbsw) { + dev_err(&client->dev, "failed to allocate driver data\n"); + return -ENOMEM; + } + + usbsw->client = client; + usbsw->pdata = client->dev.platform_data; + + chip = usbsw; + + i2c_set_clientdata(client, usbsw); + + ret = fsa9480_irq_init(usbsw); + if (ret) + goto fail1; + + ret = sysfs_create_group(&client->dev.kobj, &fsa9480_group); + if (ret) { + dev_err(&client->dev, + "failed to create fsa9480 attribute group\n"); + goto fail2; + } + + /* ADC Detect Time: 500ms */ + fsa9480_write_reg(client, FSA9480_REG_TIMING1, 0x6); + + if (chip->pdata->reset_cb) + chip->pdata->reset_cb(); + + /* device detection */ + fsa9480_detect_dev(usbsw, INT_ATTACH); + + pm_runtime_set_active(&client->dev); + + return 0; + +fail2: + if (client->irq) + free_irq(client->irq, usbsw); +fail1: + kfree(usbsw); + return ret; +} + +static int fsa9480_remove(struct i2c_client *client) +{ + struct fsa9480_usbsw *usbsw = i2c_get_clientdata(client); + if (client->irq) + free_irq(client->irq, usbsw); + + sysfs_remove_group(&client->dev.kobj, &fsa9480_group); + device_init_wakeup(&client->dev, 0); + kfree(usbsw); + return 0; +} + +#ifdef CONFIG_PM_SLEEP + +static int fsa9480_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct fsa9480_usbsw *usbsw = i2c_get_clientdata(client); + struct fsa9480_platform_data *pdata = usbsw->pdata; + + if (device_may_wakeup(&client->dev) && client->irq) + enable_irq_wake(client->irq); + + if (pdata->usb_power) + pdata->usb_power(0); + + return 0; +} + +static int fsa9480_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct fsa9480_usbsw *usbsw = i2c_get_clientdata(client); + int dev1, dev2; + + if (device_may_wakeup(&client->dev) && client->irq) + disable_irq_wake(client->irq); + + /* + * Clear Pending interrupt. Note that detect_dev does what + * the interrupt handler does. So, we don't miss pending and + * we reenable interrupt if there is one. + */ + fsa9480_read_reg(client, FSA9480_REG_INT1); + fsa9480_read_reg(client, FSA9480_REG_INT2); + + dev1 = fsa9480_read_reg(client, FSA9480_REG_DEV_T1); + dev2 = fsa9480_read_reg(client, FSA9480_REG_DEV_T2); + + /* device detection */ + fsa9480_detect_dev(usbsw, (dev1 || dev2) ? INT_ATTACH : INT_DETACH); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(fsa9480_pm_ops, fsa9480_suspend, fsa9480_resume); +#define FSA9480_PM_OPS (&fsa9480_pm_ops) + +#else + +#define FSA9480_PM_OPS NULL + +#endif /* CONFIG_PM_SLEEP */ + +static const struct i2c_device_id fsa9480_id[] = { + {"fsa9480", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, fsa9480_id); + +static struct i2c_driver fsa9480_i2c_driver = { + .driver = { + .name = "fsa9480", + .pm = FSA9480_PM_OPS, + }, + .probe = fsa9480_probe, + .remove = fsa9480_remove, + .id_table = fsa9480_id, +}; + +module_i2c_driver(fsa9480_i2c_driver); + +MODULE_AUTHOR("Minkyu Kang "); +MODULE_DESCRIPTION("FSA9480 USB Switch driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3-54-g00ecf