// SPDX-License-Identifier: GPL-2.0
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/*
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* LED flash driver for LM3554
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*
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* Copyright (c) 2010-2012 Intel Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/slab.h>
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#include "../include/media/lm3554.h"
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <linux/acpi.h>
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#include "../include/linux/atomisp_gmin_platform.h"
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#include "../include/linux/atomisp.h"
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/* Registers */
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#define LM3554_TORCH_BRIGHTNESS_REG 0xA0
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#define LM3554_TORCH_MODE_SHIFT 0
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#define LM3554_TORCH_CURRENT_SHIFT 3
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#define LM3554_INDICATOR_CURRENT_SHIFT 6
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#define LM3554_FLASH_BRIGHTNESS_REG 0xB0
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#define LM3554_FLASH_MODE_SHIFT 0
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#define LM3554_FLASH_CURRENT_SHIFT 3
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#define LM3554_STROBE_SENSITIVITY_SHIFT 7
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#define LM3554_FLASH_DURATION_REG 0xC0
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#define LM3554_FLASH_TIMEOUT_SHIFT 0
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#define LM3554_CURRENT_LIMIT_SHIFT 5
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#define LM3554_FLAGS_REG 0xD0
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#define LM3554_FLAG_TIMEOUT BIT(0)
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#define LM3554_FLAG_THERMAL_SHUTDOWN BIT(1)
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#define LM3554_FLAG_LED_FAULT BIT(2)
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#define LM3554_FLAG_TX1_INTERRUPT BIT(3)
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#define LM3554_FLAG_TX2_INTERRUPT BIT(4)
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#define LM3554_FLAG_LED_THERMAL_FAULT BIT(5)
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#define LM3554_FLAG_UNUSED BIT(6)
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#define LM3554_FLAG_INPUT_VOLTAGE_LOW BIT(7)
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#define LM3554_CONFIG_REG_1 0xE0
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#define LM3554_ENVM_TX2_SHIFT 5
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#define LM3554_TX2_POLARITY_SHIFT 6
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struct lm3554 {
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struct v4l2_subdev sd;
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struct mutex power_lock;
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struct v4l2_ctrl_handler ctrl_handler;
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int power_count;
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unsigned int mode;
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int timeout;
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u8 torch_current;
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u8 indicator_current;
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u8 flash_current;
|
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struct timer_list flash_off_delay;
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struct lm3554_platform_data *pdata;
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};
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#define to_lm3554(p_sd) container_of(p_sd, struct lm3554, sd)
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/* Return negative errno else zero on success */
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static int lm3554_write(struct lm3554 *flash, u8 addr, u8 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&flash->sd);
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int ret;
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ret = i2c_smbus_write_byte_data(client, addr, val);
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dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val,
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ret < 0 ? "fail" : "ok");
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return ret;
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}
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/* Return negative errno else a data byte received from the device. */
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static int lm3554_read(struct lm3554 *flash, u8 addr)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&flash->sd);
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int ret;
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ret = i2c_smbus_read_byte_data(client, addr);
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dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, ret,
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ret < 0 ? "fail" : "ok");
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return ret;
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}
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/* -----------------------------------------------------------------------------
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* Hardware configuration
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*/
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static int lm3554_set_mode(struct lm3554 *flash, unsigned int mode)
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{
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u8 val;
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int ret;
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val = (mode << LM3554_FLASH_MODE_SHIFT) |
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(flash->flash_current << LM3554_FLASH_CURRENT_SHIFT);
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ret = lm3554_write(flash, LM3554_FLASH_BRIGHTNESS_REG, val);
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if (ret == 0)
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flash->mode = mode;
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return ret;
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}
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static int lm3554_set_torch(struct lm3554 *flash)
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{
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u8 val;
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val = (flash->mode << LM3554_TORCH_MODE_SHIFT) |
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(flash->torch_current << LM3554_TORCH_CURRENT_SHIFT) |
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(flash->indicator_current << LM3554_INDICATOR_CURRENT_SHIFT);
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return lm3554_write(flash, LM3554_TORCH_BRIGHTNESS_REG, val);
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}
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static int lm3554_set_flash(struct lm3554 *flash)
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{
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u8 val;
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val = (flash->mode << LM3554_FLASH_MODE_SHIFT) |
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(flash->flash_current << LM3554_FLASH_CURRENT_SHIFT);
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return lm3554_write(flash, LM3554_FLASH_BRIGHTNESS_REG, val);
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}
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static int lm3554_set_duration(struct lm3554 *flash)
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{
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u8 val;
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val = (flash->timeout << LM3554_FLASH_TIMEOUT_SHIFT) |
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(flash->pdata->current_limit << LM3554_CURRENT_LIMIT_SHIFT);
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return lm3554_write(flash, LM3554_FLASH_DURATION_REG, val);
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}
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static int lm3554_set_config1(struct lm3554 *flash)
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{
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u8 val;
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val = (flash->pdata->envm_tx2 << LM3554_ENVM_TX2_SHIFT) |
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(flash->pdata->tx2_polarity << LM3554_TX2_POLARITY_SHIFT);
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return lm3554_write(flash, LM3554_CONFIG_REG_1, val);
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}
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/* -----------------------------------------------------------------------------
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* Hardware trigger
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*/
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static void lm3554_flash_off_delay(struct timer_list *t)
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{
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struct lm3554 *flash = from_timer(flash, t, flash_off_delay);
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struct lm3554_platform_data *pdata = flash->pdata;
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gpiod_set_value(pdata->gpio_strobe, 0);
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}
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static int lm3554_hw_strobe(struct i2c_client *client, bool strobe)
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{
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int ret, timer_pending;
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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struct lm3554 *flash = to_lm3554(sd);
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struct lm3554_platform_data *pdata = flash->pdata;
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/*
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* An abnormal high flash current is observed when strobe off the
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* flash. Workaround here is firstly set flash current to lower level,
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* wait a short moment, and then strobe off the flash.
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*/
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timer_pending = del_timer_sync(&flash->flash_off_delay);
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/* Flash off */
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if (!strobe) {
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/* set current to 70mA and wait a while */
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ret = lm3554_write(flash, LM3554_FLASH_BRIGHTNESS_REG, 0);
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if (ret < 0)
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goto err;
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mod_timer(&flash->flash_off_delay,
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jiffies + msecs_to_jiffies(LM3554_TIMER_DELAY));
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return 0;
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}
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/* Flash on */
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/*
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* If timer is killed before run, flash is not strobe off,
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* so must strobe off here
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*/
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if (timer_pending)
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gpiod_set_value(pdata->gpio_strobe, 0);
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/* Restore flash current settings */
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ret = lm3554_set_flash(flash);
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if (ret < 0)
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goto err;
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/* Strobe on Flash */
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gpiod_set_value(pdata->gpio_strobe, 1);
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return 0;
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err:
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dev_err(&client->dev, "failed to %s flash strobe (%d)\n",
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strobe ? "on" : "off", ret);
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return ret;
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}
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/* -----------------------------------------------------------------------------
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* V4L2 controls
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*/
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static int lm3554_read_status(struct lm3554 *flash)
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{
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int ret;
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struct i2c_client *client = v4l2_get_subdevdata(&flash->sd);
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/* NOTE: reading register clear fault status */
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ret = lm3554_read(flash, LM3554_FLAGS_REG);
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if (ret < 0)
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return ret;
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/*
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* Accordingly to datasheet we read back '1' in bit 6.
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* Clear it first.
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*/
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ret &= ~LM3554_FLAG_UNUSED;
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/*
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* Do not take TX1/TX2 signal as an error
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* because MSIC will not turn off flash, but turn to
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* torch mode according to gsm modem signal by hardware.
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*/
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ret &= ~(LM3554_FLAG_TX1_INTERRUPT | LM3554_FLAG_TX2_INTERRUPT);
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if (ret > 0)
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dev_dbg(&client->dev, "LM3554 flag status: %02x\n", ret);
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return ret;
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}
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static int lm3554_s_flash_timeout(struct v4l2_subdev *sd, u32 val)
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{
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struct lm3554 *flash = to_lm3554(sd);
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val = clamp(val, LM3554_MIN_TIMEOUT, LM3554_MAX_TIMEOUT);
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val = val / LM3554_TIMEOUT_STEPSIZE - 1;
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flash->timeout = val;
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return lm3554_set_duration(flash);
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}
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static int lm3554_g_flash_timeout(struct v4l2_subdev *sd, s32 *val)
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{
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struct lm3554 *flash = to_lm3554(sd);
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*val = (u32)(flash->timeout + 1) * LM3554_TIMEOUT_STEPSIZE;
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return 0;
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}
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static int lm3554_s_flash_intensity(struct v4l2_subdev *sd, u32 intensity)
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{
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struct lm3554 *flash = to_lm3554(sd);
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intensity = LM3554_CLAMP_PERCENTAGE(intensity);
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intensity = LM3554_PERCENT_TO_VALUE(intensity, LM3554_FLASH_STEP);
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flash->flash_current = intensity;
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return lm3554_set_flash(flash);
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}
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static int lm3554_g_flash_intensity(struct v4l2_subdev *sd, s32 *val)
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{
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struct lm3554 *flash = to_lm3554(sd);
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*val = LM3554_VALUE_TO_PERCENT((u32)flash->flash_current,
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LM3554_FLASH_STEP);
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return 0;
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}
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static int lm3554_s_torch_intensity(struct v4l2_subdev *sd, u32 intensity)
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{
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struct lm3554 *flash = to_lm3554(sd);
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intensity = LM3554_CLAMP_PERCENTAGE(intensity);
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intensity = LM3554_PERCENT_TO_VALUE(intensity, LM3554_TORCH_STEP);
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flash->torch_current = intensity;
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return lm3554_set_torch(flash);
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}
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static int lm3554_g_torch_intensity(struct v4l2_subdev *sd, s32 *val)
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{
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struct lm3554 *flash = to_lm3554(sd);
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*val = LM3554_VALUE_TO_PERCENT((u32)flash->torch_current,
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LM3554_TORCH_STEP);
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return 0;
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}
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static int lm3554_s_indicator_intensity(struct v4l2_subdev *sd, u32 intensity)
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{
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struct lm3554 *flash = to_lm3554(sd);
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intensity = LM3554_CLAMP_PERCENTAGE(intensity);
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intensity = LM3554_PERCENT_TO_VALUE(intensity, LM3554_INDICATOR_STEP);
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flash->indicator_current = intensity;
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return lm3554_set_torch(flash);
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}
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static int lm3554_g_indicator_intensity(struct v4l2_subdev *sd, s32 *val)
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{
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struct lm3554 *flash = to_lm3554(sd);
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*val = LM3554_VALUE_TO_PERCENT((u32)flash->indicator_current,
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LM3554_INDICATOR_STEP);
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return 0;
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}
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static int lm3554_s_flash_strobe(struct v4l2_subdev *sd, u32 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return lm3554_hw_strobe(client, val);
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}
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static int lm3554_s_flash_mode(struct v4l2_subdev *sd, u32 new_mode)
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{
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struct lm3554 *flash = to_lm3554(sd);
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unsigned int mode;
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switch (new_mode) {
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case ATOMISP_FLASH_MODE_OFF:
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mode = LM3554_MODE_SHUTDOWN;
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break;
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case ATOMISP_FLASH_MODE_FLASH:
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mode = LM3554_MODE_FLASH;
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break;
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case ATOMISP_FLASH_MODE_INDICATOR:
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mode = LM3554_MODE_INDICATOR;
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break;
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case ATOMISP_FLASH_MODE_TORCH:
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mode = LM3554_MODE_TORCH;
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break;
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default:
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return -EINVAL;
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}
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return lm3554_set_mode(flash, mode);
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}
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static int lm3554_g_flash_mode(struct v4l2_subdev *sd, s32 *val)
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{
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struct lm3554 *flash = to_lm3554(sd);
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*val = flash->mode;
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return 0;
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}
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static int lm3554_g_flash_status(struct v4l2_subdev *sd, s32 *val)
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{
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struct lm3554 *flash = to_lm3554(sd);
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int value;
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value = lm3554_read_status(flash);
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if (value < 0)
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return value;
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if (value & LM3554_FLAG_TIMEOUT)
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*val = ATOMISP_FLASH_STATUS_TIMEOUT;
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else if (value > 0)
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*val = ATOMISP_FLASH_STATUS_HW_ERROR;
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else
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*val = ATOMISP_FLASH_STATUS_OK;
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return 0;
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}
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static int lm3554_g_flash_status_register(struct v4l2_subdev *sd, s32 *val)
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{
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struct lm3554 *flash = to_lm3554(sd);
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int ret;
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ret = lm3554_read(flash, LM3554_FLAGS_REG);
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if (ret < 0)
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return ret;
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*val = ret;
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return 0;
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}
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static int lm3554_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct lm3554 *dev =
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container_of(ctrl->handler, struct lm3554, ctrl_handler);
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int ret = 0;
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switch (ctrl->id) {
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case V4L2_CID_FLASH_TIMEOUT:
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ret = lm3554_s_flash_timeout(&dev->sd, ctrl->val);
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break;
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case V4L2_CID_FLASH_INTENSITY:
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ret = lm3554_s_flash_intensity(&dev->sd, ctrl->val);
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break;
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case V4L2_CID_FLASH_TORCH_INTENSITY:
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ret = lm3554_s_torch_intensity(&dev->sd, ctrl->val);
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break;
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case V4L2_CID_FLASH_INDICATOR_INTENSITY:
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ret = lm3554_s_indicator_intensity(&dev->sd, ctrl->val);
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break;
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case V4L2_CID_FLASH_STROBE:
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ret = lm3554_s_flash_strobe(&dev->sd, ctrl->val);
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break;
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case V4L2_CID_FLASH_MODE:
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ret = lm3554_s_flash_mode(&dev->sd, ctrl->val);
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static int lm3554_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct lm3554 *dev =
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container_of(ctrl->handler, struct lm3554, ctrl_handler);
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int ret = 0;
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switch (ctrl->id) {
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case V4L2_CID_FLASH_TIMEOUT:
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ret = lm3554_g_flash_timeout(&dev->sd, &ctrl->val);
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break;
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case V4L2_CID_FLASH_INTENSITY:
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ret = lm3554_g_flash_intensity(&dev->sd, &ctrl->val);
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break;
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case V4L2_CID_FLASH_TORCH_INTENSITY:
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ret = lm3554_g_torch_intensity(&dev->sd, &ctrl->val);
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break;
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case V4L2_CID_FLASH_INDICATOR_INTENSITY:
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ret = lm3554_g_indicator_intensity(&dev->sd, &ctrl->val);
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break;
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case V4L2_CID_FLASH_MODE:
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ret = lm3554_g_flash_mode(&dev->sd, &ctrl->val);
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break;
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case V4L2_CID_FLASH_STATUS:
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ret = lm3554_g_flash_status(&dev->sd, &ctrl->val);
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break;
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case V4L2_CID_FLASH_STATUS_REGISTER:
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ret = lm3554_g_flash_status_register(&dev->sd, &ctrl->val);
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
|
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static const struct v4l2_ctrl_ops ctrl_ops = {
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.s_ctrl = lm3554_s_ctrl,
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.g_volatile_ctrl = lm3554_g_volatile_ctrl
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};
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static const struct v4l2_ctrl_config lm3554_controls[] = {
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{
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.ops = &ctrl_ops,
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.id = V4L2_CID_FLASH_TIMEOUT,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Flash Timeout",
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.min = 0x0,
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.max = LM3554_MAX_TIMEOUT,
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.step = 0x01,
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.def = LM3554_DEFAULT_TIMEOUT,
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.flags = 0,
|
},
|
{
|
.ops = &ctrl_ops,
|
.id = V4L2_CID_FLASH_INTENSITY,
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.type = V4L2_CTRL_TYPE_INTEGER,
|
.name = "Flash Intensity",
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.min = LM3554_MIN_PERCENT,
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.max = LM3554_MAX_PERCENT,
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.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",
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.min = LM3554_MIN_PERCENT,
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.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,
|
},
|
{
|
.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,
|
},
|
};
|
|
/* -----------------------------------------------------------------------------
|
* 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*/
|
gpiod_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 (!pdata->gpio_reset)
|
return -EINVAL;
|
|
ret = gpiod_direction_output(pdata->gpio_reset, 0);
|
if (ret < 0)
|
return ret;
|
dev_info(&client->dev, "flash led reset successfully\n");
|
|
if (!pdata->gpio_strobe)
|
return -EINVAL;
|
|
ret = gpiod_direction_output(pdata->gpio_strobe, 0);
|
if (ret < 0)
|
return ret;
|
|
return 0;
|
}
|
|
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 = gpiod_direction_output(pdata->gpio_strobe, 0);
|
if (ret < 0)
|
return ret;
|
|
ret = gpiod_direction_output(pdata->gpio_reset, 0);
|
if (ret < 0)
|
return ret;
|
|
return 0;
|
}
|
|
static void *lm3554_platform_data_func(struct i2c_client *client)
|
{
|
static struct lm3554_platform_data platform_data;
|
|
platform_data.gpio_reset = gpiod_get_index(&client->dev,
|
NULL, 2, GPIOD_OUT_LOW);
|
if (IS_ERR(platform_data.gpio_reset))
|
return ERR_CAST(platform_data.gpio_reset);
|
platform_data.gpio_strobe = gpiod_get_index(&client->dev,
|
NULL, 0, GPIOD_OUT_LOW);
|
if (IS_ERR(platform_data.gpio_strobe))
|
return ERR_CAST(platform_data.gpio_strobe);
|
platform_data.gpio_torch = gpiod_get_index(&client->dev,
|
NULL, 1, GPIOD_OUT_LOW);
|
if (IS_ERR(platform_data.gpio_torch))
|
return ERR_CAST(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;
|
|
flash = kzalloc(sizeof(*flash), GFP_KERNEL);
|
if (!flash)
|
return -ENOMEM;
|
|
flash->pdata = lm3554_platform_data_func(client);
|
if (IS_ERR(flash->pdata)) {
|
err = PTR_ERR(flash->pdata);
|
goto free_flash;
|
}
|
|
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;
|
err =
|
v4l2_ctrl_handler_init(&flash->ctrl_handler,
|
ARRAY_SIZE(lm3554_controls));
|
if (err) {
|
dev_err(&client->dev, "error initialize a ctrl_handler.\n");
|
goto unregister_subdev;
|
}
|
|
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");
|
err = flash->ctrl_handler.error;
|
goto free_handler;
|
}
|
|
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 free_handler;
|
}
|
|
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.\n");
|
goto cleanup_media;
|
}
|
|
err = atomisp_register_i2c_module(&flash->sd, NULL, LED_FLASH);
|
if (err) {
|
dev_err(&client->dev, "fail to register atomisp i2c module.\n");
|
goto uninit_gpio;
|
}
|
|
return 0;
|
|
uninit_gpio:
|
lm3554_gpio_uninit(client);
|
cleanup_media:
|
media_entity_cleanup(&flash->sd.entity);
|
free_handler:
|
v4l2_ctrl_handler_free(&flash->ctrl_handler);
|
unregister_subdev:
|
v4l2_device_unregister_subdev(&flash->sd);
|
free_flash:
|
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");
|
