// SPDX-License-Identifier: GPL-2.0
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/*
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* General device driver for awinic aw36518, FLASH LED Driver
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*
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* Copyright (C) 2022 Fuzhou Rockchip Electronics Co., Ltd.
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*
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* V0.0X01.0X00 init version.
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* V0.0X01.0X01 fix power off torch not off issue.
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* V0.0X01.0X02 fix get wrong time info issue.
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*/
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/pm_runtime.h>
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#include <linux/rk-camera-module.h>
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#include <linux/rk-led-flash.h>
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#include <linux/slab.h>
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#include <linux/version.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/compat.h>
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#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x02)
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#define AW36518_NAME "aw36518"
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#define AW36518_REG_ID 0x00
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#define AW36518_ID 0x30
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#define AW36518_REG_MODE 0x01
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#define AW36518_REG_LED0_FLASH_CUR 0x03
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#define AW36518_REG_LED0_TORCH_CUR 0x05
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#define AW36518_REG_LED1_FLASH_CUR 0x03
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#define AW36518_REG_LED1_TORCH_CUR 0x05
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#define AW36518_HW_TORCH BIT(4)
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#define AW36518_HW_STROBE BIT(5)
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#define AW36518_REG_FAULT 0x0A
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#define AW36518_REG_FL_SC 0x70
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#define AW36518_REG_FL_OT BIT(2)
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#define AW36518_REG_FL_TO BIT(0)
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#define AW36518_REG_FAULT2 0x0B
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#define AW36518_REG_FL_OVP BIT(1)
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#define AW36518_REG_ENABLE 0x01
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#define LED_ON 0x03
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#define LED_OFF 0x00
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/* FLASH Brightness
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* min 2940uA, step 5870uA, max 1500000uA
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*/
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#define AW36518_MIN_FLASH_INTENSITY 2940
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#define AW36518_MAX_FLASH_INTENSITY 1500000
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#define AW36518_FLASH_INTENSITY_DEFAULT 748430
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#define AW36518_FLASH_INTENSITY_STEP 5870
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#define AW36518_FLASH_BRT_uA_TO_REG(a) \
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((a) < AW36518_MIN_FLASH_INTENSITY ? 0 : \
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(((a) - AW36518_MIN_FLASH_INTENSITY) / AW36518_FLASH_INTENSITY_STEP))
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#define AW36518_FLASH_BRT_REG_TO_uA(a) \
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((a) * AW36518_FLASH_INTENSITY_STEP + AW36518_MIN_FLASH_INTENSITY)
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/* TORCH BRT
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* min 750uA, step 1510uA, max 3860000uA
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*/
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#define AW36518_MIN_TORCH_INTENSITY 750
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#define AW36518_MAX_TORCH_INTENSITY 386000
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#define AW36518_TORCH_INTENSITY_DEFAULT 192000
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#define AW36518_TORCH_INTENSITY_STEP 1510
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#define AW36518_TORCH_BRT_uA_TO_REG(a) \
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((a) < AW36518_MIN_TORCH_INTENSITY ? 0 : \
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(((a) - AW36518_MIN_TORCH_INTENSITY) / AW36518_TORCH_INTENSITY_STEP))
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#define AW36518_TORCH_BRT_REG_TO_uA(a) \
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((a) * AW36518_TORCH_INTENSITY_STEP + AW36518_MIN_TORCH_INTENSITY)
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/* FLASH TIMEOUT DURATION
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* min 40ms, step 40 or 200ms, max 1600ms
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*/
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#define TIMEOUT_MAX 1600000
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#define TIMEOUT_STEP 40000
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#define TIMEOUT_MIN 40000
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#define TIMEOUT_STEP2 200000
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#define TIMEOUT_DEFAULT 600000
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#define AW36518_FLASH_TOUT_ms_TO_REG(a) \
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((a) < TIMEOUT_MIN ? 0 : \
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(((a) - TIMEOUT_MIN) / TIMEOUT_STEP))
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#define AW36518_FLASH_TOUT_REG_TO_ms(a) \
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((a) * TIMEOUT_STEP + TIMEOUT_MIN)
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "debug level (0-2)");
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enum aw36518_led_id {
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LED0 = 0,
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LED1,
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LED_MAX
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};
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struct aw36518_led {
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struct v4l2_subdev sd;
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struct v4l2_ctrl_handler ctrls;
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struct v4l2_ctrl *flash_brt;
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struct v4l2_ctrl *torch_brt;
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struct __kernel_old_timeval timestamp;
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u32 max_flash_timeout;
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u32 max_flash_intensity;
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u32 max_torch_intensity;
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};
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struct aw36518_flash {
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struct i2c_client *client;
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struct aw36518_led leds[LED_MAX];
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struct gpio_desc *en_gpio;
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struct gpio_desc *torch_gpio;
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struct gpio_desc *strobe_gpio;
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struct gpio_desc *tx_gpio;
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struct mutex lock;
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u32 flash_timeout;
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enum v4l2_flash_led_mode led_mode;
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u32 module_index;
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const char *module_facing;
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bool power_on;
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};
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#define to_led(sd) container_of(sd, struct aw36518_led, sd)
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static int aw36518_i2c_write(struct aw36518_flash *flash, u8 reg, u8 val)
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{
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struct i2c_client *client = flash->client;
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int ret;
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ret = i2c_smbus_write_byte_data(client, reg, val);
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if (ret < 0)
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dev_err(&client->dev,
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"%s: reg:0x%x val:0x%x failed\n",
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__func__, reg, val);
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v4l2_dbg(2, debug, &flash->leds[0].sd,
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"%s: reg:0x%x val:0x%x\n",
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__func__, reg, val);
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return ret;
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}
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static int aw36518_i2c_read(struct aw36518_flash *flash, u8 reg)
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{
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struct i2c_client *client = flash->client;
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int ret;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0)
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dev_err(&client->dev,
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"%s: reg:0x%x failed\n",
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__func__, reg);
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dev_dbg(&client->dev, "%s: reg:0x%x val:0x%x\n",
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__func__, reg, ret);
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return ret;
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}
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static int aw36518_led_on(struct aw36518_flash *flash, bool on)
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{
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int ret;
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struct i2c_client *client = flash->client;
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int temp;
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u8 val = 0;
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v4l2_dbg(1, debug, &flash->leds[0].sd,
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"%s: on:%d\n", __func__, on);
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temp = aw36518_i2c_read(flash, AW36518_REG_ENABLE);
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if (temp < 0)
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dev_err(&client->dev,
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"%s: read reg:0x%x failed.\n",
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__func__, AW36518_REG_ENABLE);
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if (flash->led_mode == V4L2_FLASH_LED_MODE_FLASH && on)
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temp = temp | 0x0c;
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else
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temp = temp & 0xfc;
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v4l2_dbg(1, debug, &flash->leds[0].sd,
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"%s: temp:%d\n", __func__, temp);
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val = on ? LED_ON : LED_OFF;
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ret = aw36518_i2c_write(flash, AW36518_REG_ENABLE, val | temp);
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flash->leds[0].timestamp = ns_to_kernel_old_timeval(ktime_get_ns());
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flash->leds[1].timestamp = flash->leds[0].timestamp;
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return ret;
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}
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static int aw36518_get_fault(struct aw36518_flash *flash)
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{
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int fault = 0;
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int temp = 0;
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fault = aw36518_i2c_read(flash, AW36518_REG_FAULT);
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v4l2_dbg(1, debug, &flash->leds[0].sd,
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"%s: 0x%x\n", __func__, fault);
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fault = fault & 0xfd;
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temp = aw36518_i2c_read(flash, AW36518_REG_FAULT2);
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fault = fault | (temp & 0x2);
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return fault;
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}
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static int aw36518_timeout_cal(struct aw36518_flash *flash)
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{
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u8 val;
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v4l2_dbg(1, debug, &flash->leds[0].sd,
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"%s: timeout:%dUS\n", __func__, flash->flash_timeout);
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if (flash->flash_timeout < 400000)
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val = AW36518_FLASH_TOUT_ms_TO_REG(flash->flash_timeout);
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else {
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val = (flash->flash_timeout - 0x400000) / TIMEOUT_STEP2;
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val = val + 0x09;
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}
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return val;
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}
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static int aw36518_set_timeout(struct aw36518_flash *flash, u32 timeout)
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{
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int ret;
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u8 val;
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v4l2_dbg(1, debug, &flash->leds[0].sd,
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"%s: %d\n",
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__func__, flash->flash_timeout);
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flash->flash_timeout = timeout;
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ret = aw36518_i2c_read(flash, 0x08);
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if (ret < 0)
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return ret;
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val = aw36518_timeout_cal(flash);
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return aw36518_i2c_write(flash, 0x08, val | (ret & 0xf0));
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}
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static int aw36518_torch_brt(struct aw36518_flash *flash,
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enum aw36518_led_id id)
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{
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struct aw36518_led *led = &flash->leds[id];
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u8 val, reg;
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v4l2_dbg(1, debug, &led->sd,
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"%s: %d\n", __func__, led->torch_brt->val);
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val = AW36518_TORCH_BRT_uA_TO_REG(led->torch_brt->val);
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reg = id ? AW36518_REG_LED1_TORCH_CUR : AW36518_REG_LED0_TORCH_CUR;
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return aw36518_i2c_write(flash, reg, val);
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}
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static int aw36518_flash_brt(struct aw36518_flash *flash,
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enum aw36518_led_id id)
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{
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struct aw36518_led *led = &flash->leds[id];
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u8 val, reg;
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v4l2_dbg(1, debug, &led->sd,
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"%s: %d\n", __func__, led->flash_brt->val);
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val = AW36518_FLASH_BRT_uA_TO_REG(led->flash_brt->val);
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reg = id ? AW36518_REG_LED1_FLASH_CUR : AW36518_REG_LED0_FLASH_CUR;
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return aw36518_i2c_write(flash, reg, val);
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}
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static int aw36518_set_mode(struct aw36518_flash *flash,
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enum aw36518_led_id id, unsigned int mode)
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{
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int ret = 0;
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v4l2_dbg(1, debug, &flash->leds[id].sd,
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"%s: %d cur:%d\n", __func__,
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mode, flash->led_mode);
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if (flash->led_mode == mode)
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return 0;
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aw36518_led_on(flash, false);
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flash->led_mode = mode;
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if (mode == V4L2_FLASH_LED_MODE_FLASH) {
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ret = aw36518_i2c_write(flash, 0x01, 0x0C);
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ret |= aw36518_flash_brt(flash, LED0);
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} else if (mode == V4L2_FLASH_LED_MODE_TORCH) {
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//ret = aw36518_i2c_write(flash, 0x01, 0x08);
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/* hw torch/strobe io trigger torch */
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ret = aw36518_i2c_write(flash, 0x01, AW36518_HW_TORCH);
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ret |= aw36518_torch_brt(flash, LED0);
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ret |= aw36518_led_on(flash, true);
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if (flash->torch_gpio) {
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v4l2_dbg(1, debug, &flash->leds[id].sd,
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"%s:set torch gpio high.\n", __func__);
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gpiod_set_value_cansleep(flash->torch_gpio, 1);
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}
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} else {
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ret = aw36518_i2c_write(flash, 0x01, 0x00);
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if (flash->torch_gpio) {
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v4l2_dbg(1, debug, &flash->leds[id].sd,
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"%s:set torch gpio low.\n", __func__);
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gpiod_set_value_cansleep(flash->torch_gpio, 0);
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}
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}
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return ret;
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}
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static int aw36518_strobe(struct aw36518_flash *flash, bool on)
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{
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int ret;
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v4l2_dbg(1, debug, &flash->leds[0].sd,
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"%s: on %d\n", __func__, on);
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if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
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return -EBUSY;
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ret = aw36518_led_on(flash, on);
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return ret;
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}
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static int aw36518_get_ctrl(struct v4l2_ctrl *ctrl, enum aw36518_led_id id)
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{
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struct aw36518_led *led =
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container_of(ctrl->handler, struct aw36518_led, ctrls);
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struct aw36518_flash *flash =
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container_of(led, struct aw36518_flash, leds[id]);
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int ret = 0;
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struct i2c_client *client = flash->client;
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v4l2_dbg(1, debug, &flash->leds[id].sd,
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"%s: id 0x%x\n", __func__, ctrl->id);
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mutex_lock(&flash->lock);
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switch (ctrl->id) {
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case V4L2_CID_FLASH_FAULT:
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ret = aw36518_get_fault(flash);
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ctrl->val = 0;
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if (ret & AW36518_REG_FL_SC)
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ctrl->val |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
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if (ret & AW36518_REG_FL_OT)
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ctrl->val |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
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if (ret & AW36518_REG_FL_TO)
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ctrl->val |= V4L2_FLASH_FAULT_TIMEOUT;
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if (ret & AW36518_REG_FL_OVP)
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ctrl->val |= V4L2_FLASH_FAULT_OVER_VOLTAGE;
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ret = 0;
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break;
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default:
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dev_err(&client->dev,
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"ctrl 0x%x not supported\n", ctrl->id);
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ret = -EINVAL;
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break;
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}
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mutex_unlock(&flash->lock);
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return ret;
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}
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static int aw36518_set_ctrl(struct v4l2_ctrl *ctrl, enum aw36518_led_id id)
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{
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struct aw36518_led *led =
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container_of(ctrl->handler, struct aw36518_led, ctrls);
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struct aw36518_flash *flash =
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container_of(led, struct aw36518_flash, leds[id]);
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int ret = 0;
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struct i2c_client *client = flash->client;
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v4l2_dbg(1, debug, &led->sd,
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"%s: id 0x%x val 0x%x\n",
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__func__, ctrl->id, ctrl->val);
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mutex_lock(&flash->lock);
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ret = aw36518_get_fault(flash);
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if ((ret & (AW36518_REG_FL_OVP |
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AW36518_REG_FL_OT |
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AW36518_REG_FL_SC)) &&
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(ctrl->id == V4L2_CID_FLASH_STROBE ||
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ctrl->id == V4L2_CID_FLASH_TORCH_INTENSITY ||
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ctrl->id == V4L2_CID_FLASH_LED_MODE)) {
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ret = -EBUSY;
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goto err;
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}
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switch (ctrl->id) {
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case V4L2_CID_FLASH_LED_MODE:
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ret = aw36518_set_mode(flash, id, ctrl->val);
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break;
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case V4L2_CID_FLASH_STROBE:
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ret = aw36518_strobe(flash, true);
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break;
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case V4L2_CID_FLASH_STROBE_STOP:
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ret = aw36518_strobe(flash, false);
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break;
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case V4L2_CID_FLASH_TIMEOUT:
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ret = aw36518_set_timeout(flash, ctrl->val);
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break;
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case V4L2_CID_FLASH_INTENSITY:
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ret = aw36518_flash_brt(flash, id);
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break;
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case V4L2_CID_FLASH_TORCH_INTENSITY:
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ret = aw36518_torch_brt(flash, id);
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break;
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default:
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dev_err(&client->dev,
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"ctrl 0x%x not supported\n", ctrl->id);
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ret = -EINVAL;
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break;
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}
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err:
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mutex_unlock(&flash->lock);
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return ret;
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}
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static int aw36518_led0_get_ctrl(struct v4l2_ctrl *ctrl)
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{
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return aw36518_get_ctrl(ctrl, LED0);
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}
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static int aw36518_led0_set_ctrl(struct v4l2_ctrl *ctrl)
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{
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return aw36518_set_ctrl(ctrl, LED0);
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}
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static int aw36518_led1_get_ctrl(struct v4l2_ctrl *ctrl)
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{
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return aw36518_get_ctrl(ctrl, LED1);
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}
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static int aw36518_led1_set_ctrl(struct v4l2_ctrl *ctrl)
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{
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return aw36518_set_ctrl(ctrl, LED1);
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}
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static const struct v4l2_ctrl_ops aw36518_ctrl_ops[LED_MAX] = {
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[LED0] = {
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.g_volatile_ctrl = aw36518_led0_get_ctrl,
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.s_ctrl = aw36518_led0_set_ctrl,
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},
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[LED1] = {
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.g_volatile_ctrl = aw36518_led1_get_ctrl,
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.s_ctrl = aw36518_led1_set_ctrl,
|
}
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};
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static int aw36518_init_controls(struct aw36518_flash *flash,
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enum aw36518_led_id id)
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{
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struct v4l2_ctrl *fault;
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struct v4l2_ctrl_handler *hdl = &flash->leds[id].ctrls;
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const struct v4l2_ctrl_ops *ops = &aw36518_ctrl_ops[id];
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struct aw36518_led *led = &flash->leds[id];
|
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v4l2_ctrl_handler_init(hdl, 8);
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v4l2_ctrl_new_std_menu(hdl, ops,
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V4L2_CID_FLASH_LED_MODE,
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V4L2_FLASH_LED_MODE_TORCH, ~0x7, 0);
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flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
|
|
v4l2_ctrl_new_std_menu(hdl, ops,
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V4L2_CID_FLASH_STROBE_SOURCE,
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V4L2_FLASH_STROBE_SOURCE_SOFTWARE, ~0x1, 0);
|
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v4l2_ctrl_new_std(hdl, ops,
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V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);
|
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v4l2_ctrl_new_std(hdl, ops,
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V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);
|
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v4l2_ctrl_new_std(hdl, ops,
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V4L2_CID_FLASH_TIMEOUT, TIMEOUT_MIN,
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led->max_flash_timeout,
|
TIMEOUT_STEP,
|
led->max_flash_timeout);
|
flash->flash_timeout = led->max_flash_timeout;
|
|
flash->leds[id].flash_brt =
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v4l2_ctrl_new_std(hdl, ops,
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V4L2_CID_FLASH_INTENSITY,
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AW36518_MIN_FLASH_INTENSITY,
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led->max_flash_intensity,
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AW36518_FLASH_INTENSITY_STEP,
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AW36518_FLASH_INTENSITY_DEFAULT);
|
|
flash->leds[id].torch_brt =
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v4l2_ctrl_new_std(hdl, ops,
|
V4L2_CID_FLASH_TORCH_INTENSITY,
|
AW36518_MIN_TORCH_INTENSITY,
|
led->max_torch_intensity,
|
AW36518_TORCH_INTENSITY_STEP,
|
AW36518_TORCH_INTENSITY_DEFAULT);
|
|
fault = v4l2_ctrl_new_std(hdl, ops,
|
V4L2_CID_FLASH_FAULT, 0,
|
V4L2_FLASH_FAULT_OVER_VOLTAGE
|
| V4L2_FLASH_FAULT_TIMEOUT
|
| V4L2_FLASH_FAULT_OVER_TEMPERATURE
|
| V4L2_FLASH_FAULT_SHORT_CIRCUIT, 0, 0);
|
|
if (hdl->error)
|
return hdl->error;
|
|
fault->flags |= V4L2_CTRL_FLAG_VOLATILE;
|
|
flash->leds[id].sd.ctrl_handler = hdl;
|
return 0;
|
}
|
|
static void aw36518_get_time_info(struct v4l2_subdev *sd,
|
struct __kernel_old_timeval *ti)
|
{
|
struct aw36518_led *led =
|
container_of(sd, struct aw36518_led, sd);
|
|
memset(ti, 0, sizeof(*ti));
|
ti->tv_sec = led->timestamp.tv_sec;
|
ti->tv_usec = led->timestamp.tv_usec;
|
v4l2_dbg(1, debug, sd,
|
"%s: tv_sec:%ld, tv_usec:%ld\n", __func__, ti->tv_sec, ti->tv_usec);
|
}
|
|
static long aw36518_ioctl(struct v4l2_subdev *sd,
|
unsigned int cmd, void *arg)
|
{
|
long ret = 0;
|
|
switch (cmd) {
|
case RK_VIDIOC_FLASH_TIMEINFO:
|
aw36518_get_time_info(sd, (struct __kernel_old_timeval *)arg);
|
break;
|
|
default:
|
ret = -ENOIOCTLCMD;
|
break;
|
}
|
return ret;
|
}
|
|
#ifdef CONFIG_COMPAT
|
#define RK_VIDIOC_COMPAT_FLASH_TIMEINFO \
|
_IOR('V', BASE_VIDIOC_PRIVATE + 0, struct old_timeval32)
|
|
static long aw36518_compat_ioctl32(struct v4l2_subdev *sd,
|
unsigned int cmd,
|
unsigned long arg)
|
{
|
void __user *up = compat_ptr(arg);
|
struct old_timeval32 *compat_t;
|
long ret;
|
struct __kernel_old_timeval t;
|
|
switch (cmd) {
|
case RK_VIDIOC_COMPAT_FLASH_TIMEINFO:
|
compat_t = kzalloc(sizeof(*compat_t), GFP_KERNEL);
|
if (!compat_t) {
|
ret = -ENOMEM;
|
return ret;
|
}
|
ret = aw36518_ioctl(sd, RK_VIDIOC_FLASH_TIMEINFO, &t);
|
if (!ret) {
|
compat_t->tv_sec = t.tv_sec;
|
compat_t->tv_usec = t.tv_usec;
|
ret = copy_to_user(up, compat_t, sizeof(*compat_t));
|
if (ret)
|
ret = -EFAULT;
|
}
|
kfree(compat_t);
|
break;
|
|
default:
|
ret = -ENOIOCTLCMD;
|
break;
|
}
|
|
return ret;
|
}
|
#endif
|
|
static int aw36518_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
|
{
|
int rval;
|
|
rval = pm_runtime_get_sync(sd->dev);
|
if (rval < 0) {
|
pm_runtime_put_noidle(sd->dev);
|
return rval;
|
}
|
|
return 0;
|
}
|
|
static int aw36518_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
|
{
|
pm_runtime_put(sd->dev);
|
|
return 0;
|
}
|
|
static int aw36518_s_power(struct v4l2_subdev *sd, int on)
|
{
|
struct aw36518_led *led = to_led(sd);
|
struct aw36518_flash *flash =
|
container_of(led, struct aw36518_flash, leds[0]);
|
int ret = 0;
|
struct i2c_client *client = flash->client;
|
|
dev_info(&client->dev, "%s on(%d)\n", __func__, on);
|
mutex_lock(&flash->lock);
|
|
/* If the power state is not modified - no work to do. */
|
if (flash->power_on == !!on)
|
goto unlock_and_return;
|
|
if (on) {
|
ret = pm_runtime_get_sync(&client->dev);
|
if (ret < 0) {
|
pm_runtime_put_noidle(&client->dev);
|
goto unlock_and_return;
|
}
|
flash->power_on = true;
|
} else {
|
pm_runtime_put(&client->dev);
|
flash->power_on = false;
|
}
|
|
unlock_and_return:
|
mutex_unlock(&flash->lock);
|
|
return ret;
|
}
|
|
static const struct v4l2_subdev_core_ops aw36518_core_ops = {
|
.s_power = aw36518_s_power,
|
.ioctl = aw36518_ioctl,
|
#ifdef CONFIG_COMPAT
|
.compat_ioctl32 = aw36518_compat_ioctl32
|
#endif
|
};
|
|
static const struct v4l2_subdev_ops aw36518_ops = {
|
.core = &aw36518_core_ops,
|
};
|
|
static const struct v4l2_subdev_internal_ops aw36518_internal_ops = {
|
.open = aw36518_open,
|
.close = aw36518_close,
|
};
|
|
static int __aw36518_set_power(struct aw36518_flash *flash, bool on)
|
{
|
gpiod_direction_output(flash->en_gpio, on);
|
|
return 0;
|
}
|
|
static int aw36518_check_id(struct aw36518_flash *flash)
|
{
|
int ret = 0;
|
|
__aw36518_set_power(flash, true);
|
ret = aw36518_i2c_read(flash, AW36518_REG_ID);
|
if (ret != AW36518_ID) {
|
dev_err(&flash->client->dev,
|
"Read chip id error\n");
|
return -ENODEV;
|
}
|
|
dev_info(&flash->client->dev,
|
"Detected aw36518 flash id:0x%x\n", ret);
|
return 0;
|
}
|
|
static int aw36518_of_init(struct i2c_client *client,
|
struct aw36518_flash *flash)
|
{
|
struct device_node *node = client->dev.of_node;
|
struct device_node *child;
|
struct aw36518_led *led;
|
int ret = 0;
|
|
if (!node) {
|
dev_err(&client->dev,
|
"get device node failed\n");
|
goto err;
|
}
|
|
ret = of_property_read_u32(node,
|
RKMODULE_CAMERA_MODULE_INDEX,
|
&flash->module_index);
|
ret |= of_property_read_string(node,
|
RKMODULE_CAMERA_MODULE_FACING,
|
&flash->module_facing);
|
if (ret) {
|
dev_err(&client->dev,
|
"could not get module information!\n");
|
goto err;
|
}
|
|
flash->en_gpio = devm_gpiod_get(&client->dev,
|
"enable", GPIOD_OUT_LOW);
|
if (IS_ERR(flash->en_gpio)) {
|
flash->en_gpio = NULL;
|
dev_warn(&client->dev,
|
"get enable-gpio failed, using assist light mode\n");
|
}
|
|
flash->torch_gpio = devm_gpiod_get(&client->dev,
|
"torch", GPIOD_OUT_LOW);
|
if (IS_ERR(flash->torch_gpio)) {
|
flash->torch_gpio = NULL;
|
dev_warn(&client->dev,
|
"get torch-gpio failed, using assist light mode\n");
|
}
|
|
flash->strobe_gpio = devm_gpiod_get(&client->dev,
|
"strobe", GPIOD_OUT_LOW);
|
if (IS_ERR(flash->strobe_gpio)) {
|
flash->strobe_gpio = NULL;
|
dev_warn(&client->dev,
|
"get strobe-gpio failed, using assist light mode\n");
|
|
}
|
flash->tx_gpio = devm_gpiod_get(&client->dev,
|
"tx", GPIOD_OUT_LOW);
|
if (IS_ERR(flash->tx_gpio)) {
|
flash->tx_gpio = NULL;
|
dev_warn(&client->dev,
|
"get tx-gpio failed, using assist light mode\n");
|
}
|
|
for_each_child_of_node(node, child) {
|
u32 id = 0;
|
|
of_property_read_u32(child, "reg", &id);
|
if (id >= LED_MAX) {
|
dev_err(&client->dev, "only support 2 leds\n");
|
goto err;
|
}
|
led = &flash->leds[id];
|
led->sd.fwnode = of_fwnode_handle(child);
|
if (of_property_read_u32(child, "flash-max-timeout-us",
|
&led->max_flash_timeout)) {
|
dev_err(&client->dev,
|
"get led%d flash-max-timeout-us fail\n", id);
|
goto err;
|
}
|
if (led->max_flash_timeout > TIMEOUT_MAX)
|
led->max_flash_timeout = TIMEOUT_MAX;
|
|
if (of_property_read_u32(child, "flash-max-microamp",
|
&led->max_flash_intensity)) {
|
dev_err(&client->dev,
|
"get led%d flash-max-microamp fail\n", id);
|
goto err;
|
}
|
if (led->max_flash_intensity > AW36518_MAX_FLASH_INTENSITY)
|
led->max_flash_intensity = AW36518_MAX_FLASH_INTENSITY;
|
|
if (of_property_read_u32(child, "led-max-microamp",
|
&led->max_torch_intensity)) {
|
dev_err(&client->dev,
|
"get led%d led-max-microamp fail\n", id);
|
goto err;
|
}
|
if (led->max_torch_intensity > AW36518_MAX_TORCH_INTENSITY)
|
led->max_torch_intensity = AW36518_MAX_TORCH_INTENSITY;
|
|
v4l2_dbg(1, debug, &led->sd,
|
"led%d max torch:%dUA flash:%dUA timeout:%dUS\n",
|
id, led->max_torch_intensity,
|
led->max_flash_intensity,
|
led->max_flash_timeout);
|
}
|
|
return 0;
|
err:
|
return -EINVAL;
|
}
|
|
static int aw36518_init_device(struct aw36518_flash *flash)
|
{
|
int ret;
|
unsigned int reg_val;
|
struct i2c_client *client = flash->client;
|
|
/* output disable */
|
flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
|
ret = aw36518_set_mode(flash, 0, 0);
|
if (ret < 0)
|
return ret;
|
/* reset faults */
|
reg_val = aw36518_i2c_read(flash, AW36518_REG_FAULT);
|
dev_info(&client->dev, "%s: fault: 0x%x.\n", __func__, reg_val);
|
/* tx input default low */
|
if (flash->tx_gpio)
|
gpiod_direction_output(flash->tx_gpio, 0);
|
/* STROBE/Torch input default low */
|
if (flash->torch_gpio)
|
gpiod_set_value_cansleep(flash->torch_gpio, 0);
|
|
return ret;
|
}
|
|
static int aw36518_probe(struct i2c_client *client,
|
const struct i2c_device_id *devid)
|
{
|
struct aw36518_flash *flash;
|
struct v4l2_subdev *sd;
|
char facing[2];
|
int i, ret;
|
|
dev_info(&client->dev, "driver version: %02x.%02x.%02x",
|
DRIVER_VERSION >> 16,
|
(DRIVER_VERSION & 0xff00) >> 8,
|
DRIVER_VERSION & 0x00ff);
|
|
flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
|
if (!flash)
|
return -ENOMEM;
|
|
flash->client = client;
|
|
ret = aw36518_of_init(client, flash);
|
if (ret)
|
return ret;
|
|
ret = aw36518_check_id(flash);
|
if (ret)
|
goto err_power_off;
|
|
for (i = 0; i < LED_MAX; i++) {
|
sd = &flash->leds[i].sd;
|
v4l2_i2c_subdev_init(sd, client, &aw36518_ops);
|
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
sd->internal_ops = &aw36518_internal_ops;
|
|
memset(facing, 0, sizeof(facing));
|
if (strcmp(flash->module_facing, "back") == 0)
|
facing[0] = 'b';
|
else
|
facing[0] = 'f';
|
/* NOTE: to distinguish between two led
|
* name: led0 meet the main led
|
* name: led1 meet the secondary led
|
*/
|
snprintf(sd->name, sizeof(sd->name),
|
"m%02d_%s_%s_led%d %s",
|
flash->module_index, facing,
|
AW36518_NAME, i, dev_name(sd->dev));
|
|
ret = aw36518_init_controls(flash, i);
|
if (ret)
|
goto err;
|
|
ret = media_entity_pads_init(&sd->entity, 0, NULL);
|
if (ret < 0)
|
goto free_ctl;
|
|
sd->entity.function = MEDIA_ENT_F_FLASH;
|
ret = v4l2_async_register_subdev(sd);
|
if (ret)
|
goto free_media;
|
}
|
|
ret = aw36518_init_device(flash);
|
if (ret < 0)
|
goto free_media;
|
|
i2c_set_clientdata(client, flash);
|
|
mutex_init(&flash->lock);
|
|
pm_runtime_set_active(&client->dev);
|
pm_runtime_enable(&client->dev);
|
pm_runtime_idle(&client->dev);
|
|
dev_info(&client->dev, "probing successful\n");
|
|
return 0;
|
free_media:
|
media_entity_cleanup(&flash->leds[i].sd.entity);
|
free_ctl:
|
v4l2_ctrl_handler_free(&flash->leds[i].ctrls);
|
err:
|
for (--i; i >= 0; --i) {
|
v4l2_device_unregister_subdev(&flash->leds[i].sd);
|
media_entity_cleanup(&flash->leds[i].sd.entity);
|
v4l2_ctrl_handler_free(&flash->leds[i].ctrls);
|
}
|
err_power_off:
|
__aw36518_set_power(flash, false);
|
return ret;
|
}
|
|
static int aw36518_remove(struct i2c_client *client)
|
{
|
struct aw36518_flash *flash = i2c_get_clientdata(client);
|
unsigned int i;
|
|
pm_runtime_disable(&client->dev);
|
for (i = 0; i < LED_MAX; i++) {
|
v4l2_device_unregister_subdev(&flash->leds[i].sd);
|
v4l2_ctrl_handler_free(&flash->leds[i].ctrls);
|
media_entity_cleanup(&flash->leds[i].sd.entity);
|
}
|
mutex_destroy(&flash->lock);
|
return 0;
|
}
|
|
static int __maybe_unused aw36518_runtime_suspend(struct device *dev)
|
{
|
struct i2c_client *client = to_i2c_client(dev);
|
struct aw36518_flash *flash = i2c_get_clientdata(client);
|
|
return __aw36518_set_power(flash, false);
|
}
|
|
static int __maybe_unused aw36518_runtime_resume(struct device *dev)
|
{
|
struct i2c_client *client = to_i2c_client(dev);
|
struct aw36518_flash *flash = i2c_get_clientdata(client);
|
|
return __aw36518_set_power(flash, true);
|
}
|
|
static const struct i2c_device_id aw36518_id_table[] = {
|
{ AW36518_NAME, 0 },
|
{ { 0 } }
|
};
|
MODULE_DEVICE_TABLE(i2c, aw36518_id_table);
|
|
static const struct of_device_id aw36518_of_table[] = {
|
{ .compatible = "awinic,aw36518" },
|
{ { 0 } }
|
};
|
|
static const struct dev_pm_ops aw36518_pm_ops = {
|
SET_RUNTIME_PM_OPS(aw36518_runtime_suspend,
|
aw36518_runtime_resume, NULL)
|
};
|
|
static struct i2c_driver aw36518_i2c_driver = {
|
.driver = {
|
.name = AW36518_NAME,
|
.pm = &aw36518_pm_ops,
|
.of_match_table = aw36518_of_table,
|
},
|
.probe = aw36518_probe,
|
.remove = aw36518_remove,
|
.id_table = aw36518_id_table,
|
};
|
|
module_i2c_driver(aw36518_i2c_driver);
|
|
MODULE_DESCRIPTION("AW36518 LED flash driver");
|
MODULE_LICENSE("GPL");
|
