diff options
Diffstat (limited to 'drivers/staging/media/atomisp/i2c/atomisp-lm3554.c')
| -rw-r--r-- | drivers/staging/media/atomisp/i2c/atomisp-lm3554.c | 968 |
1 files changed, 0 insertions, 968 deletions
diff --git a/drivers/staging/media/atomisp/i2c/atomisp-lm3554.c b/drivers/staging/media/atomisp/i2c/atomisp-lm3554.c deleted file mode 100644 index 7098bf317f16..000000000000 --- a/drivers/staging/media/atomisp/i2c/atomisp-lm3554.c +++ /dev/null @@ -1,968 +0,0 @@ -/* - * LED flash driver for LM3554 - * - * Copyright (c) 2010-2012 Intel Corporation. All Rights Reserved. - * - * 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. - * - * 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. - * - * - */ -#include <linux/module.h> -#include <linux/i2c.h> -#include <linux/mutex.h> -#include <linux/delay.h> -#include <linux/gpio.h> -#include <linux/slab.h> - -#include "../include/media/lm3554.h" -#include <media/v4l2-ctrls.h> -#include <media/v4l2-device.h> -#include <linux/acpi.h> -#include <linux/gpio/consumer.h> -#include "../include/linux/atomisp_gmin_platform.h" -#include "../include/linux/atomisp.h" - -/* Registers */ - -#define LM3554_TORCH_BRIGHTNESS_REG 0xA0 -#define LM3554_TORCH_MODE_SHIFT 0 -#define LM3554_TORCH_CURRENT_SHIFT 3 -#define LM3554_INDICATOR_CURRENT_SHIFT 6 - -#define LM3554_FLASH_BRIGHTNESS_REG 0xB0 -#define LM3554_FLASH_MODE_SHIFT 0 -#define LM3554_FLASH_CURRENT_SHIFT 3 -#define LM3554_STROBE_SENSITIVITY_SHIFT 7 - -#define LM3554_FLASH_DURATION_REG 0xC0 -#define LM3554_FLASH_TIMEOUT_SHIFT 0 -#define LM3554_CURRENT_LIMIT_SHIFT 5 - -#define LM3554_FLAGS_REG 0xD0 -#define LM3554_FLAG_TIMEOUT (1 << 0) -#define LM3554_FLAG_THERMAL_SHUTDOWN (1 << 1) -#define LM3554_FLAG_LED_FAULT (1 << 2) -#define LM3554_FLAG_TX1_INTERRUPT (1 << 3) -#define LM3554_FLAG_TX2_INTERRUPT (1 << 4) -#define LM3554_FLAG_LED_THERMAL_FAULT (1 << 5) -#define LM3554_FLAG_UNUSED (1 << 6) -#define LM3554_FLAG_INPUT_VOLTAGE_LOW (1 << 7) - -#define LM3554_CONFIG_REG_1 0xE0 -#define LM3554_ENVM_TX2_SHIFT 5 -#define LM3554_TX2_POLARITY_SHIFT 6 - -struct lm3554 { - struct v4l2_subdev sd; - - struct mutex power_lock; - struct v4l2_ctrl_handler ctrl_handler; - int power_count; - - unsigned int mode; - int timeout; - u8 torch_current; - u8 indicator_current; - u8 flash_current; - - struct timer_list flash_off_delay; - struct lm3554_platform_data *pdata; -}; - -#define to_lm3554(p_sd) container_of(p_sd, struct lm3554, sd) - -/* Return negative errno else zero on success */ -static int lm3554_write(struct lm3554 *flash, u8 addr, u8 val) -{ - struct i2c_client *client = v4l2_get_subdevdata(&flash->sd); - int ret; - - ret = i2c_smbus_write_byte_data(client, addr, val); - - dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val, - ret < 0 ? "fail" : "ok"); - - return ret; -} - -/* Return negative errno else a data byte received from the device. */ -static int lm3554_read(struct lm3554 *flash, u8 addr) -{ - struct i2c_client *client = v4l2_get_subdevdata(&flash->sd); - int ret; - - ret = i2c_smbus_read_byte_data(client, addr); - - dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, ret, - ret < 0 ? "fail" : "ok"); - - return ret; -} - -/* ----------------------------------------------------------------------------- - * Hardware configuration - */ - -static int lm3554_set_mode(struct lm3554 *flash, unsigned int mode) -{ - u8 val; - int ret; - - val = (mode << LM3554_FLASH_MODE_SHIFT) | - (flash->flash_current << LM3554_FLASH_CURRENT_SHIFT); - - ret = lm3554_write(flash, LM3554_FLASH_BRIGHTNESS_REG, val); - if (ret == 0) - flash->mode = mode; - return ret; -} - -static int lm3554_set_torch(struct lm3554 *flash) -{ - u8 val; - - val = (flash->mode << LM3554_TORCH_MODE_SHIFT) | - (flash->torch_current << LM3554_TORCH_CURRENT_SHIFT) | - (flash->indicator_current << LM3554_INDICATOR_CURRENT_SHIFT); - - return lm3554_write(flash, LM3554_TORCH_BRIGHTNESS_REG, val); -} - -static int lm3554_set_flash(struct lm3554 *flash) -{ - u8 val; - - val = (flash->mode << LM3554_FLASH_MODE_SHIFT) | - (flash->flash_current << LM3554_FLASH_CURRENT_SHIFT); - - return lm3554_write(flash, LM3554_FLASH_BRIGHTNESS_REG, val); -} - -static int lm3554_set_duration(struct lm3554 *flash) -{ - u8 val; - - val = (flash->timeout << LM3554_FLASH_TIMEOUT_SHIFT) | - (flash->pdata->current_limit << LM3554_CURRENT_LIMIT_SHIFT); - - return lm3554_write(flash, LM3554_FLASH_DURATION_REG, val); -} - -static int lm3554_set_config1(struct lm3554 *flash) -{ - u8 val; - - val = (flash->pdata->envm_tx2 << LM3554_ENVM_TX2_SHIFT) | - (flash->pdata->tx2_polarity << LM3554_TX2_POLARITY_SHIFT); - return lm3554_write(flash, LM3554_CONFIG_REG_1, val); -} - -/* ----------------------------------------------------------------------------- - * Hardware trigger - */ -static void lm3554_flash_off_delay(struct timer_list *t) -{ - struct lm3554 *flash = from_timer(flash, t, flash_off_delay); - struct lm3554_platform_data *pdata = flash->pdata; - - gpio_set_value(pdata->gpio_strobe, 0); -} - -static int lm3554_hw_strobe(struct i2c_client *client, bool strobe) -{ - int ret, timer_pending; - struct v4l2_subdev *sd = i2c_get_clientdata(client); - struct lm3554 *flash = to_lm3554(sd); - struct lm3554_platform_data *pdata = flash->pdata; - - /* - * An abnormal high flash current is observed when strobe off the - * flash. Workaround here is firstly set flash current to lower level, - * wait a short moment, and then strobe off the flash. - */ - - timer_pending = del_timer_sync(&flash->flash_off_delay); - - /* Flash off */ - if (!strobe) { - /* set current to 70mA and wait a while */ - ret = lm3554_write(flash, LM3554_FLASH_BRIGHTNESS_REG, 0); - if (ret < 0) - goto err; - mod_timer(&flash->flash_off_delay, - jiffies + msecs_to_jiffies(LM3554_TIMER_DELAY)); - return 0; - } - - /* Flash on */ - - /* - * If timer is killed before run, flash is not strobe off, - * so must strobe off here - */ - if (timer_pending) - gpio_set_value(pdata->gpio_strobe, 0); - - /* Restore flash current settings */ - ret = lm3554_set_flash(flash); - if (ret < 0) - goto err; - - /* Strobe on Flash */ - gpio_set_value(pdata->gpio_strobe, 1); - - return 0; -err: - dev_err(&client->dev, "failed to %s flash strobe (%d)\n", - strobe ? "on" : "off", ret); - return ret; -} - -/* ----------------------------------------------------------------------------- - * V4L2 controls - */ - -static int lm3554_read_status(struct lm3554 *flash) -{ - int ret; - struct i2c_client *client = v4l2_get_subdevdata(&flash->sd); - - /* NOTE: reading register clear fault status */ - ret = lm3554_read(flash, LM3554_FLAGS_REG); - if (ret < 0) - return ret; - - /* - * Accordingly to datasheet we read back '1' in bit 6. - * Clear it first. - */ - ret &= ~LM3554_FLAG_UNUSED; - - /* - * Do not take TX1/TX2 signal as an error - * because MSIC will not turn off flash, but turn to - * torch mode according to gsm modem signal by hardware. - */ - ret &= ~(LM3554_FLAG_TX1_INTERRUPT | LM3554_FLAG_TX2_INTERRUPT); - - if (ret > 0) - dev_dbg(&client->dev, "LM3554 flag status: %02x\n", ret); - - return ret; -} - -static int lm3554_s_flash_timeout(struct v4l2_subdev *sd, u32 val) -{ - struct lm3554 *flash = to_lm3554(sd); - - val = clamp(val, LM3554_MIN_TIMEOUT, LM3554_MAX_TIMEOUT); - val = val / LM3554_TIMEOUT_STEPSIZE - 1; - - flash->timeout = val; - - return lm3554_set_duration(flash); -} - -static int lm3554_g_flash_timeout(struct v4l2_subdev *sd, s32 *val) -{ - struct lm3554 *flash = to_lm3554(sd); - - *val = (u32)(flash->timeout + 1) * LM3554_TIMEOUT_STEPSIZE; - - return 0; -} - -static int lm3554_s_flash_intensity(struct v4l2_subdev *sd, u32 intensity) -{ - struct lm3554 *flash = to_lm3554(sd); - - intensity = LM3554_CLAMP_PERCENTAGE(intensity); - intensity = LM3554_PERCENT_TO_VALUE(intensity, LM3554_FLASH_STEP); - - flash->flash_current = intensity; - - return lm3554_set_flash(flash); -} - -static int lm3554_g_flash_intensity(struct v4l2_subdev *sd, s32 *val) -{ - struct lm3554 *flash = to_lm3554(sd); - - *val = LM3554_VALUE_TO_PERCENT((u32)flash->flash_current, - LM3554_FLASH_STEP); - - return 0; -} - -static int lm3554_s_torch_intensity(struct v4l2_subdev *sd, u32 intensity) -{ - struct lm3554 *flash = to_lm3554(sd); - - intensity = LM3554_CLAMP_PERCENTAGE(intensity); - intensity = LM3554_PERCENT_TO_VALUE(intensity, LM3554_TORCH_STEP); - - flash->torch_current = intensity; - - return lm3554_set_torch(flash); -} - -static int lm3554_g_torch_intensity(struct v4l2_subdev *sd, s32 *val) -{ - struct lm3554 *flash = to_lm3554(sd); - - *val = LM3554_VALUE_TO_PERCENT((u32)flash->torch_current, - LM3554_TORCH_STEP); - - return 0; -} - -static int lm3554_s_indicator_intensity(struct v4l2_subdev *sd, u32 intensity) -{ - struct lm3554 *flash = to_lm3554(sd); - - intensity = LM3554_CLAMP_PERCENTAGE(intensity); - intensity = LM3554_PERCENT_TO_VALUE(intensity, LM3554_INDICATOR_STEP); - - flash->indicator_current = intensity; - - return lm3554_set_torch(flash); -} - -static int lm3554_g_indicator_intensity(struct v4l2_subdev *sd, s32 *val) -{ - struct lm3554 *flash = to_lm3554(sd); - - *val = LM3554_VALUE_TO_PERCENT((u32)flash->indicator_current, - LM3554_INDICATOR_STEP); - - return 0; -} - -static int lm3554_s_flash_strobe(struct v4l2_subdev *sd, u32 val) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - - return lm3554_hw_strobe(client, val); -} - -static int lm3554_s_flash_mode(struct v4l2_subdev *sd, u32 new_mode) -{ - struct lm3554 *flash = to_lm3554(sd); - unsigned int mode; - - switch (new_mode) { - case ATOMISP_FLASH_MODE_OFF: - mode = LM3554_MODE_SHUTDOWN; - break; - case ATOMISP_FLASH_MODE_FLASH: - mode = LM3554_MODE_FLASH; - break; - case ATOMISP_FLASH_MODE_INDICATOR: - mode = LM3554_MODE_INDICATOR; - break; - case ATOMISP_FLASH_MODE_TORCH: - mode = LM3554_MODE_TORCH; - break; - default: - return -EINVAL; - } - - return lm3554_set_mode(flash, mode); -} - -static int lm3554_g_flash_mode(struct v4l2_subdev *sd, s32 *val) -{ - struct lm3554 *flash = to_lm3554(sd); - *val = flash->mode; - return 0; -} - -static int lm3554_g_flash_status(struct v4l2_subdev *sd, s32 *val) -{ - struct lm3554 *flash = to_lm3554(sd); - int value; - - value = lm3554_read_status(flash); - if (value < 0) - return value; - - if (value & LM3554_FLAG_TIMEOUT) - *val = ATOMISP_FLASH_STATUS_TIMEOUT; - else if (value > 0) - *val = ATOMISP_FLASH_STATUS_HW_ERROR; - else - *val = ATOMISP_FLASH_STATUS_OK; - - return 0; -} - -#ifndef CSS15 -static int lm3554_g_flash_status_register(struct v4l2_subdev *sd, s32 *val) -{ - struct lm3554 *flash = to_lm3554(sd); - int ret; - - ret = lm3554_read(flash, LM3554_FLAGS_REG); - - if (ret < 0) - return ret; - - *val = ret; - return 0; -} -#endif - -static int lm3554_s_ctrl(struct v4l2_ctrl *ctrl) -{ - struct lm3554 *dev = - container_of(ctrl->handler, struct lm3554, ctrl_handler); - int ret = 0; - - switch (ctrl->id) { - case V4L2_CID_FLASH_TIMEOUT: - ret = lm3554_s_flash_timeout(&dev->sd, ctrl->val); - break; - case V4L2_CID_FLASH_INTENSITY: - ret = lm3554_s_flash_intensity(&dev->sd, ctrl->val); - break; - case V4L2_CID_FLASH_TORCH_INTENSITY: - ret = lm3554_s_torch_intensity(&dev->sd, ctrl->val); - break; - case V4L2_CID_FLASH_INDICATOR_INTENSITY: - ret = lm3554_s_indicator_intensity(&dev->sd, ctrl->val); - break; - case V4L2_CID_FLASH_STROBE: - ret = lm3554_s_flash_strobe(&dev->sd, ctrl->val); - break; - case V4L2_CID_FLASH_MODE: - ret = lm3554_s_flash_mode(&dev->sd, ctrl->val); - break; - default: - ret = -EINVAL; - } - return ret; -} - -static int lm3554_g_volatile_ctrl(struct v4l2_ctrl *ctrl) -{ - struct lm3554 *dev = - container_of(ctrl->handler, struct lm3554, ctrl_handler); - int ret = 0; - - switch (ctrl->id) { - case V4L2_CID_FLASH_TIMEOUT: - ret = lm3554_g_flash_timeout(&dev->sd, &ctrl->val); - break; - case V4L2_CID_FLASH_INTENSITY: - ret = lm3554_g_flash_intensity(&dev->sd, &ctrl->val); - break; - case V4L2_CID_FLASH_TORCH_INTENSITY: - ret = lm3554_g_torch_intensity(&dev->sd, &ctrl->val); - break; - case V4L2_CID_FLASH_INDICATOR_INTENSITY: - ret = lm3554_g_indicator_intensity(&dev->sd, &ctrl->val); - break; - case V4L2_CID_FLASH_MODE: - ret = lm3554_g_flash_mode(&dev->sd, &ctrl->val); - break; - case V4L2_CID_FLASH_STATUS: - ret = lm3554_g_flash_status(&dev->sd, &ctrl->val); - break; -#ifndef CSS15 - case V4L2_CID_FLASH_STATUS_REGISTER: - ret = lm3554_g_flash_status_register(&dev->sd, &ctrl->val); - break; -#endif - default: - ret = -EINVAL; - } - - return ret; -} - -static const struct v4l2_ctrl_ops ctrl_ops = { - .s_ctrl = lm3554_s_ctrl, - .g_volatile_ctrl = lm3554_g_volatile_ctrl -}; - -static const struct v4l2_ctrl_config lm3554_controls[] = { - { - .ops = &ctrl_ops, - .id = V4L2_CID_FLASH_TIMEOUT, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Flash Timeout", - .min = 0x0, - .max = LM3554_MAX_TIMEOUT, - .step = 0x01, - .def = LM3554_DEFAULT_TIMEOUT, - .flags = 0, - }, - { - .ops = &ctrl_ops, - .id = V4L2_CID_FLASH_INTENSITY, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Flash Intensity", - .min = LM3554_MIN_PERCENT, - .max = LM3554_MAX_PERCENT, - .step = 0x01, - .def = LM3554_FLASH_DEFAULT_BRIGHTNESS, - .flags = 0, - }, - { - .ops = &ctrl_ops, - .id = V4L2_CID_FLASH_TORCH_INTENSITY, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Torch Intensity", - .min = LM3554_MIN_PERCENT, - .max = LM3554_MAX_PERCENT, - .step = 0x01, - .def = LM3554_TORCH_DEFAULT_BRIGHTNESS, - .flags = 0, - }, - { - .ops = &ctrl_ops, - .id = V4L2_CID_FLASH_INDICATOR_INTENSITY, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Indicator Intensity", - .min = LM3554_MIN_PERCENT, - .max = LM3554_MAX_PERCENT, - .step = 0x01, - .def = LM3554_INDICATOR_DEFAULT_BRIGHTNESS, - .flags = 0, - }, - { - .ops = &ctrl_ops, - .id = V4L2_CID_FLASH_STROBE, - .type = V4L2_CTRL_TYPE_BOOLEAN, - .name = "Flash Strobe", - .min = 0, - .max = 1, - .step = 1, - .def = 0, - .flags = 0, - }, - { - .ops = &ctrl_ops, - .id = V4L2_CID_FLASH_MODE, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Flash Mode", - .min = 0, - .max = 100, - .step = 1, - .def = ATOMISP_FLASH_MODE_OFF, - .flags = 0, - }, - { - .ops = &ctrl_ops, - .id = V4L2_CID_FLASH_STATUS, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Flash Status", - .min = ATOMISP_FLASH_STATUS_OK, - .max = ATOMISP_FLASH_STATUS_TIMEOUT, - .step = 1, - .def = ATOMISP_FLASH_STATUS_OK, - .flags = 0, - }, -#ifndef CSS15 - { - .ops = &ctrl_ops, - .id = V4L2_CID_FLASH_STATUS_REGISTER, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Flash Status Register", - .min = 0, - .max = 255, - .step = 1, - .def = 0, - .flags = 0, - }, -#endif -}; - -/* ----------------------------------------------------------------------------- - * V4L2 subdev core operations - */ - -/* Put device into known state. */ -static int lm3554_setup(struct lm3554 *flash) -{ - struct i2c_client *client = v4l2_get_subdevdata(&flash->sd); - int ret; - - /* clear the flags register */ - ret = lm3554_read(flash, LM3554_FLAGS_REG); - if (ret < 0) - return ret; - - dev_dbg(&client->dev, "Fault info: %02x\n", ret); - - ret = lm3554_set_config1(flash); - if (ret < 0) - return ret; - - ret = lm3554_set_duration(flash); - if (ret < 0) - return ret; - - ret = lm3554_set_torch(flash); - if (ret < 0) - return ret; - - ret = lm3554_set_flash(flash); - if (ret < 0) - return ret; - - /* read status */ - ret = lm3554_read_status(flash); - if (ret < 0) - return ret; - - return ret ? -EIO : 0; -} - -static int __lm3554_s_power(struct lm3554 *flash, int power) -{ - struct lm3554_platform_data *pdata = flash->pdata; - int ret; - - /*initialize flash driver*/ - gpio_set_value(pdata->gpio_reset, power); - usleep_range(100, 100 + 1); - - if (power) { - /* Setup default values. This makes sure that the chip - * is in a known state. - */ - ret = lm3554_setup(flash); - if (ret < 0) { - __lm3554_s_power(flash, 0); - return ret; - } - } - - return 0; -} - -static int lm3554_s_power(struct v4l2_subdev *sd, int power) -{ - struct lm3554 *flash = to_lm3554(sd); - int ret = 0; - - mutex_lock(&flash->power_lock); - - if (flash->power_count == !power) { - ret = __lm3554_s_power(flash, !!power); - if (ret < 0) - goto done; - } - - flash->power_count += power ? 1 : -1; - WARN_ON(flash->power_count < 0); - -done: - mutex_unlock(&flash->power_lock); - return ret; -} - -static const struct v4l2_subdev_core_ops lm3554_core_ops = { - .s_power = lm3554_s_power, -}; - -static const struct v4l2_subdev_ops lm3554_ops = { - .core = &lm3554_core_ops, -}; - -static int lm3554_detect(struct v4l2_subdev *sd) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct i2c_adapter *adapter = client->adapter; - struct lm3554 *flash = to_lm3554(sd); - int ret; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { - dev_err(&client->dev, "lm3554_detect i2c error\n"); - return -ENODEV; - } - - /* Power up the flash driver and reset it */ - ret = lm3554_s_power(&flash->sd, 1); - if (ret < 0) { - dev_err(&client->dev, "Failed to power on lm3554 LED flash\n"); - } else { - dev_dbg(&client->dev, "Successfully detected lm3554 LED flash\n"); - lm3554_s_power(&flash->sd, 0); - } - - return ret; -} - -static int lm3554_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) -{ - return lm3554_s_power(sd, 1); -} - -static int lm3554_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) -{ - return lm3554_s_power(sd, 0); -} - -static const struct v4l2_subdev_internal_ops lm3554_internal_ops = { - .registered = lm3554_detect, - .open = lm3554_open, - .close = lm3554_close, -}; - -/* ----------------------------------------------------------------------------- - * I2C driver - */ -#ifdef CONFIG_PM - -static int lm3554_suspend(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct v4l2_subdev *subdev = i2c_get_clientdata(client); - struct lm3554 *flash = to_lm3554(subdev); - int rval; - - if (flash->power_count == 0) - return 0; - - rval = __lm3554_s_power(flash, 0); - - dev_dbg(&client->dev, "Suspend %s\n", rval < 0 ? "failed" : "ok"); - - return rval; -} - -static int lm3554_resume(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct v4l2_subdev *subdev = i2c_get_clientdata(client); - struct lm3554 *flash = to_lm3554(subdev); - int rval; - - if (flash->power_count == 0) - return 0; - - rval = __lm3554_s_power(flash, 1); - - dev_dbg(&client->dev, "Resume %s\n", rval < 0 ? "fail" : "ok"); - - return rval; -} - -#else - -#define lm3554_suspend NULL -#define lm3554_resume NULL - -#endif /* CONFIG_PM */ - -static int lm3554_gpio_init(struct i2c_client *client) -{ - struct v4l2_subdev *sd = i2c_get_clientdata(client); - struct lm3554 *flash = to_lm3554(sd); - struct lm3554_platform_data *pdata = flash->pdata; - int ret; - - if (!gpio_is_valid(pdata->gpio_reset)) - return -EINVAL; - - ret = gpio_direction_output(pdata->gpio_reset, 0); - if (ret < 0) - goto err_gpio_reset; - dev_info(&client->dev, "flash led reset successfully\n"); - - if (!gpio_is_valid(pdata->gpio_strobe)) { - ret = -EINVAL; - goto err_gpio_dir_reset; - } - - ret = gpio_direction_output(pdata->gpio_strobe, 0); - if (ret < 0) - goto err_gpio_strobe; - - return 0; - -err_gpio_strobe: - gpio_free(pdata->gpio_strobe); -err_gpio_dir_reset: - gpio_direction_output(pdata->gpio_reset, 0); -err_gpio_reset: - gpio_free(pdata->gpio_reset); - - return ret; -} - -static int lm3554_gpio_uninit(struct i2c_client *client) -{ - struct v4l2_subdev *sd = i2c_get_clientdata(client); - struct lm3554 *flash = to_lm3554(sd); - struct lm3554_platform_data *pdata = flash->pdata; - int ret; - - ret = gpio_direction_output(pdata->gpio_strobe, 0); - if (ret < 0) - return ret; - - ret = gpio_direction_output(pdata->gpio_reset, 0); - if (ret < 0) - return ret; - - gpio_free(pdata->gpio_strobe); - gpio_free(pdata->gpio_reset); - return 0; -} - -static void *lm3554_platform_data_func(struct i2c_client *client) -{ - static struct lm3554_platform_data platform_data; - - platform_data.gpio_reset = - desc_to_gpio(gpiod_get_index(&client->dev, - NULL, 2, GPIOD_OUT_LOW)); - platform_data.gpio_strobe = - desc_to_gpio(gpiod_get_index(&client->dev, - NULL, 0, GPIOD_OUT_LOW)); - platform_data.gpio_torch = - desc_to_gpio(gpiod_get_index(&client->dev, - NULL, 1, GPIOD_OUT_LOW)); - dev_info(&client->dev, "camera pdata: lm3554: reset: %d strobe %d torch %d\n", - platform_data.gpio_reset, platform_data.gpio_strobe, - platform_data.gpio_torch); - - /* Set to TX2 mode, then ENVM/TX2 pin is a power amplifier sync input: - * ENVM/TX pin asserted, flash forced into torch; - * ENVM/TX pin desserted, flash set back; - */ - platform_data.envm_tx2 = 1; - platform_data.tx2_polarity = 0; - - /* set peak current limit to be 1000mA */ - platform_data.current_limit = 0; - - return &platform_data; -} - -static int lm3554_probe(struct i2c_client *client) -{ - int err = 0; - struct lm3554 *flash; - unsigned int i; - int ret; - - flash = kzalloc(sizeof(*flash), GFP_KERNEL); - if (!flash) - return -ENOMEM; - - flash->pdata = lm3554_platform_data_func(client); - - v4l2_i2c_subdev_init(&flash->sd, client, &lm3554_ops); - flash->sd.internal_ops = &lm3554_internal_ops; - flash->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; - flash->mode = ATOMISP_FLASH_MODE_OFF; - flash->timeout = LM3554_MAX_TIMEOUT / LM3554_TIMEOUT_STEPSIZE - 1; - ret = - v4l2_ctrl_handler_init(&flash->ctrl_handler, - ARRAY_SIZE(lm3554_controls)); - if (ret) { - dev_err(&client->dev, "error initialize a ctrl_handler.\n"); - goto fail2; - } - - for (i = 0; i < ARRAY_SIZE(lm3554_controls); i++) - v4l2_ctrl_new_custom(&flash->ctrl_handler, &lm3554_controls[i], - NULL); - - if (flash->ctrl_handler.error) { - - dev_err(&client->dev, "ctrl_handler error.\n"); - goto fail2; - } - - flash->sd.ctrl_handler = &flash->ctrl_handler; - err = media_entity_pads_init(&flash->sd.entity, 0, NULL); - if (err) { - dev_err(&client->dev, "error initialize a media entity.\n"); - goto fail1; - } - - flash->sd.entity.function = MEDIA_ENT_F_FLASH; - - mutex_init(&flash->power_lock); - - timer_setup(&flash->flash_off_delay, lm3554_flash_off_delay, 0); - - err = lm3554_gpio_init(client); - if (err) { - dev_err(&client->dev, "gpio request/direction_output fail"); - goto fail2; - } - return atomisp_register_i2c_module(&flash->sd, NULL, LED_FLASH); -fail2: - media_entity_cleanup(&flash->sd.entity); - v4l2_ctrl_handler_free(&flash->ctrl_handler); -fail1: - v4l2_device_unregister_subdev(&flash->sd); - kfree(flash); - - return err; -} - -static int lm3554_remove(struct i2c_client *client) -{ - struct v4l2_subdev *sd = i2c_get_clientdata(client); - struct lm3554 *flash = to_lm3554(sd); - int ret; - - media_entity_cleanup(&flash->sd.entity); - v4l2_ctrl_handler_free(&flash->ctrl_handler); - v4l2_device_unregister_subdev(sd); - - atomisp_gmin_remove_subdev(sd); - - del_timer_sync(&flash->flash_off_delay); - - ret = lm3554_gpio_uninit(client); - if (ret < 0) - goto fail; - - kfree(flash); - - return 0; -fail: - dev_err(&client->dev, "gpio request/direction_output fail"); - return ret; -} - -static const struct dev_pm_ops lm3554_pm_ops = { - .suspend = lm3554_suspend, - .resume = lm3554_resume, -}; - -static const struct acpi_device_id lm3554_acpi_match[] = { - { "INTCF1C" }, - {}, -}; -MODULE_DEVICE_TABLE(acpi, lm3554_acpi_match); - -static struct i2c_driver lm3554_driver = { - .driver = { - .name = "lm3554", - .pm = &lm3554_pm_ops, - .acpi_match_table = lm3554_acpi_match, - }, - .probe_new = lm3554_probe, - .remove = lm3554_remove, -}; -module_i2c_driver(lm3554_driver); - -MODULE_AUTHOR("Jing Tao <jing.tao@intel.com>"); -MODULE_DESCRIPTION("LED flash driver for LM3554"); -MODULE_LICENSE("GPL"); |