434 lines
12 KiB
C
Executable File
434 lines
12 KiB
C
Executable File
/*
|
|
* LED driver - leds-rt8547.c
|
|
*
|
|
* Copyright (C) 2016 Younghoon Joo <yhoon.joo@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pwm.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/leds-rt8547.h>
|
|
#ifdef CONFIG_OF
|
|
#include <linux/of.h>
|
|
#include <linux/of_gpio.h>
|
|
#endif
|
|
|
|
extern struct class *camera_class; /*sys/class/camera*/
|
|
struct device *rt8547_dev;
|
|
|
|
struct rt8547_platform_data *global_rt8547data;
|
|
struct device *global_dev;
|
|
|
|
bool assistive_light = false;
|
|
|
|
void rt8547_setGpio(int onoff)
|
|
{
|
|
if (onoff) {
|
|
gpio_direction_output(global_rt8547data->flash_control, 1);
|
|
gpio_direction_output(global_rt8547data->flash_en, 1);
|
|
} else {
|
|
gpio_direction_output(global_rt8547data->flash_control, 0);
|
|
gpio_direction_output(global_rt8547data->flash_en, 0);
|
|
}
|
|
}
|
|
|
|
void rt8547_set_low_bit(void)
|
|
{
|
|
gpio_direction_output(global_rt8547data->flash_control, 0);
|
|
udelay(T_LONG);
|
|
gpio_direction_output(global_rt8547data->flash_control, 1);
|
|
udelay(T_SHORT);
|
|
}
|
|
|
|
void rt8547_set_high_bit(void)
|
|
{
|
|
gpio_direction_output(global_rt8547data->flash_control, 0);
|
|
udelay(T_SHORT);
|
|
gpio_direction_output(global_rt8547data->flash_control, 1);
|
|
udelay(T_LONG);
|
|
}
|
|
|
|
static int rt8547_set_bit(unsigned int bit)
|
|
{
|
|
if (bit) {
|
|
rt8547_set_high_bit();
|
|
} else {
|
|
rt8547_set_low_bit();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rt8547_write_one_wire_data(unsigned int data, unsigned int len)
|
|
{
|
|
int i = 0;
|
|
|
|
for ( i = len-1; i >= 0; i--) {
|
|
rt8547_set_bit((data >> i) & 0x01);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rt8547_write_data(unsigned int regAddr, unsigned int data)
|
|
{
|
|
int err = 0;
|
|
|
|
gpio_direction_output(global_rt8547data->flash_control, 1);
|
|
udelay(T_SOD);
|
|
|
|
/* Write Slave Address */
|
|
rt8547_write_one_wire_data(RT8547_SLAVE_ADDR, 8);
|
|
|
|
/* Write Reg Address */
|
|
rt8547_write_one_wire_data(regAddr, 3);
|
|
|
|
/* Write Data */
|
|
rt8547_write_one_wire_data(data, 8);
|
|
|
|
/* Data End Condition */
|
|
gpio_direction_output(global_rt8547data->flash_control, 0);
|
|
udelay(T_SHORT);
|
|
gpio_direction_output(global_rt8547data->flash_control, 1);
|
|
udelay(T_EOD);
|
|
|
|
return err;
|
|
}
|
|
|
|
ssize_t rt8547_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf,
|
|
size_t count)
|
|
{
|
|
int value = 0;
|
|
int ret = 0;
|
|
int torch_step = 0;
|
|
unsigned long flags = 0;
|
|
|
|
if ((buf == NULL) || kstrtouint(buf, 10, &value)) {
|
|
return -1;
|
|
}
|
|
|
|
global_rt8547data->sysfs_input_data = value;
|
|
|
|
ret = gpio_request(global_rt8547data->flash_control, "rt8547_led_control");
|
|
if (ret) {
|
|
LED_ERROR("Failed to requeset rt8547_led_control\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = gpio_request(global_rt8547data->flash_en, "rt8547_led_en");
|
|
if (ret) {
|
|
LED_ERROR("Failed to requeset rt8547_led_en\n");
|
|
return ret;
|
|
}
|
|
|
|
if (value <= 0) {
|
|
LED_INFO("RT8547-TORCH OFF. : E(%d)\n", value);
|
|
assistive_light = false;
|
|
global_rt8547data->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;
|
|
|
|
spin_lock_irqsave(&global_rt8547data->int_lock, flags);
|
|
rt8547_setGpio(0);
|
|
spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
|
|
|
|
LED_INFO("RT8547-TORCH OFF. : X(%d)\n", value);
|
|
} else {
|
|
LED_INFO("RT8547-TORCH ON. : E(%d)\n", value);
|
|
assistive_light = true;
|
|
global_rt8547data->mode_status = RT8547_ENABLE_MOVIE_MODE;
|
|
spin_lock_irqsave(&global_rt8547data->int_lock, flags);
|
|
rt8547_write_data(RT8547_ADDR_LVP_SETTING, RT8547_3V);
|
|
if (value == 100) {
|
|
rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
|
|
global_rt8547data->factory_current_value | RT8547_TORCH_SELECT);
|
|
} else if ((1001 <= value) && (value <= 1010)) {
|
|
/* (value) 1001, 1002, 1004, 1006, 1009
|
|
: (torch_step) 1(50mA), 2(75mA), 4(125mA), 9(200mA), 10(275mA) */
|
|
if (value <= 1001)
|
|
torch_step = 1;
|
|
else if (value <= 1002)
|
|
torch_step = 2;
|
|
else if (value <= 1004)
|
|
torch_step = 4;
|
|
else if (value <= 1006)
|
|
torch_step = 9;
|
|
else if (value <= 1009)
|
|
torch_step = 10;
|
|
else
|
|
torch_step = 2;
|
|
|
|
rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
|
|
torch_step | RT8547_TORCH_SELECT);
|
|
LED_INFO("torch current enum(%d) : %d mA\n", torch_step, torch_step * 25 + 25);
|
|
} else {
|
|
rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
|
|
global_rt8547data->movie_current_value | RT8547_TORCH_SELECT);
|
|
LED_INFO("global_rt8547data->movie_current_value(%d)\n",
|
|
global_rt8547data->movie_current_value);
|
|
}
|
|
rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
|
|
(RT8547_TIMEOUT_CURRENT_400mA << 5) | RT8547_FLASH_CURRENT_150mA);
|
|
rt8547_write_data(RT8547_ADDR_FLASH_TIMEOUT_SETTING, RT8547_TIMER_1216ms);
|
|
|
|
gpio_direction_output(global_rt8547data->flash_en, 1);
|
|
spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
|
|
|
|
LED_INFO("RT8547-TORCH ON. : X(%d)\n", value);
|
|
}
|
|
|
|
gpio_free(global_rt8547data->flash_control);
|
|
gpio_free(global_rt8547data->flash_en);
|
|
|
|
return count;
|
|
}
|
|
|
|
EXPORT_SYMBOL(rt8547_led_mode_ctrl);
|
|
|
|
int32_t rt8547_led_mode_ctrl(int state)
|
|
{
|
|
int ret = 0;
|
|
unsigned long flags = 0;
|
|
|
|
if (assistive_light == true) {
|
|
LED_INFO(" assistive_light is enabled \n");
|
|
return 0;
|
|
}
|
|
|
|
ret = gpio_request(global_rt8547data->flash_control, "rt8547_led_control");
|
|
if (ret) {
|
|
LED_ERROR("Failed to request rt8547_led_mode_ctrl\n");
|
|
return ret;
|
|
}
|
|
|
|
switch(state) {
|
|
case RT8547_ENABLE_PRE_FLASH_MODE:
|
|
/* FlashLight Mode Pre Flash */
|
|
LED_INFO("RT8547-Pre Flash ON E(%d)\n", state);
|
|
global_rt8547data->mode_status = RT8547_ENABLE_PRE_FLASH_MODE;
|
|
spin_lock_irqsave(&global_rt8547data->int_lock, flags);
|
|
rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage);
|
|
rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
|
|
global_rt8547data->pre_current_value|RT8547_TORCH_SELECT);
|
|
rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
|
|
(RT8547_TIMEOUT_CURRENT_400mA << 5) | RT8547_FLASH_CURRENT_150mA);
|
|
spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
|
|
|
|
LED_INFO("RT8547-Pre Flash ON X(%d)\n", state);
|
|
break;
|
|
case RT8547_ENABLE_MOVIE_MODE:
|
|
/* FlashLight Mode TORCH */
|
|
LED_INFO("RT8547-TORCH ON E(%d)\n", state);
|
|
global_rt8547data->mode_status = RT8547_ENABLE_MOVIE_MODE;
|
|
spin_lock_irqsave(&global_rt8547data->int_lock, flags);
|
|
rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage);
|
|
rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
|
|
global_rt8547data->movie_current_value|RT8547_TORCH_SELECT);
|
|
rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
|
|
(RT8547_TIMEOUT_CURRENT_400mA << 5) | RT8547_FLASH_CURRENT_150mA);
|
|
spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
|
|
LED_INFO("RT8547-TORCH ON X(%d)\n", state);
|
|
break;
|
|
case RT8547_ENABLE_FLASH_MODE:
|
|
/* FlashLight Mode Flash */
|
|
LED_INFO("RT8547-FLASH ON E(%d)\n", state);
|
|
global_rt8547data->mode_status = RT8547_ENABLE_FLASH_MODE;
|
|
spin_lock_irqsave(&global_rt8547data->int_lock, flags);
|
|
rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage); // LVP setting
|
|
rt8547_write_data(RT8547_ADDR_CURRENT_SETTING, RT8547_STROBE_SELECT); // Strobe select
|
|
rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
|
|
(RT8547_TIMEOUT_CURRENT_400mA << 5) | global_rt8547data->flash_current_value);
|
|
spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
|
|
LED_INFO("RT8547-FLASH ON X(%d)\n", state);
|
|
break;
|
|
case RT8547_DISABLES_MOVIE_FLASH_MODE:
|
|
default:
|
|
/* FlashLight Mode OFF */
|
|
LED_INFO("RT8547-FLASH OFF E(%d)\n", state);
|
|
global_rt8547data->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;
|
|
spin_lock_irqsave(&global_rt8547data->int_lock, flags);
|
|
rt8547_setGpio(0);
|
|
spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
|
|
|
|
LED_INFO("RT8547-FLASH OFF X(%d)\n", state);
|
|
break;
|
|
}
|
|
|
|
gpio_free(global_rt8547data->flash_control);
|
|
|
|
return ret;
|
|
}
|
|
|
|
ssize_t rt8547_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", global_rt8547data->sysfs_input_data);
|
|
}
|
|
|
|
static DEVICE_ATTR(rear_flash, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH,
|
|
rt8547_show, rt8547_store);
|
|
static DEVICE_ATTR(rear_torch_flash, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH,
|
|
rt8547_show, rt8547_store);
|
|
|
|
static int rt8547_parse_dt(struct device *dev,
|
|
struct rt8547_platform_data *pdata)
|
|
{
|
|
struct device_node *dnode = dev->of_node;
|
|
u32 buffer = 0;
|
|
int ret = 0;
|
|
|
|
/* Defulat Value */
|
|
pdata->LVP_Voltage = RT8547_3V;
|
|
pdata->flash_timeout = RT8547_TIMER_992ms;
|
|
pdata->timeout_current_value = RT8547_TIMEOUT_CURRENT_350mA;
|
|
pdata->flash_current_value = RT8547_FLASH_CURRENT_1500mA;
|
|
pdata->movie_current_value = RT8547_MOVIE_CURRENT_200mA;
|
|
pdata->pre_current_value = RT8547_MOVIE_CURRENT_275mA;
|
|
pdata->factory_current_value = RT8547_MOVIE_CURRENT_400mA;
|
|
pdata->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;
|
|
|
|
/* get gpio */
|
|
pdata->flash_control = of_get_named_gpio(dnode, "flash_control", 0);
|
|
if (!gpio_is_valid(pdata->flash_control)) {
|
|
dev_err(dev, "failed to get flash_control\n");
|
|
return -1;
|
|
}
|
|
|
|
pdata->flash_en = of_get_named_gpio(dnode, "flash_en", 0);
|
|
if (!gpio_is_valid(pdata->flash_en)) {
|
|
dev_err(dev, "failed to get flash_en\n");
|
|
return -1;
|
|
}
|
|
|
|
/* get flash current value */
|
|
if (of_property_read_u32(dnode, "flash_current", &buffer) == 0) {
|
|
dev_info(dev, "flash_current = <%d><%d>\n", buffer,RT8547_FLASH_CURRENT(buffer)&0x1F);
|
|
pdata->flash_current_value = RT8547_FLASH_CURRENT(buffer)&0x1F;
|
|
}
|
|
|
|
/* get movie current value */
|
|
if (of_property_read_u32(dnode, "movie_current", &buffer) == 0) {
|
|
dev_info(dev, "movie_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
|
|
pdata->movie_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
|
|
}
|
|
|
|
/* get factory current value */
|
|
if (of_property_read_u32(dnode, "factory_current", &buffer) == 0) {
|
|
dev_info(dev, "factory_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
|
|
pdata->factory_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
|
|
}
|
|
|
|
/* get pre current value */
|
|
if (of_property_read_u32(dnode, "pre_current", &buffer) == 0) {
|
|
dev_info(dev, "pre_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
|
|
pdata->pre_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rt8547_probe(struct platform_device *pdev)
|
|
{
|
|
struct rt8547_platform_data *pdata;
|
|
int ret = 0;
|
|
|
|
if (pdev->dev.of_node) {
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "Failed to allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
ret = rt8547_parse_dt(&pdev->dev, pdata);
|
|
if (ret < 0) {
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
pdata = pdev->dev.platform_data;
|
|
if (pdata == NULL) {
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
global_rt8547data = pdata;
|
|
global_dev = &pdev->dev;
|
|
|
|
LED_INFO("RT8547_LED Probe\n");
|
|
|
|
gpio_request_one(global_rt8547data->flash_control, GPIOF_OUT_INIT_LOW, "rt8547_led_control");
|
|
gpio_request_one(global_rt8547data->flash_en, GPIOF_OUT_INIT_LOW, "rt8547_led_en");
|
|
gpio_free(global_rt8547data->flash_control);
|
|
gpio_free(global_rt8547data->flash_en);
|
|
|
|
rt8547_dev = device_create(camera_class, NULL, 0, NULL, "flash");
|
|
if (IS_ERR(rt8547_dev)) {
|
|
LED_ERROR("Failed to create device(flash)!\n");
|
|
}
|
|
|
|
if (device_create_file(rt8547_dev, &dev_attr_rear_flash) < 0) {
|
|
LED_ERROR("failed to create device file, %s\n",
|
|
dev_attr_rear_flash.attr.name);
|
|
}
|
|
if (device_create_file(rt8547_dev, &dev_attr_rear_torch_flash) < 0) {
|
|
LED_ERROR("failed to create device file, %s\n",
|
|
dev_attr_rear_torch_flash.attr.name);
|
|
}
|
|
spin_lock_init(&pdata->int_lock);
|
|
|
|
return 0;
|
|
}
|
|
static int rt8547_remove(struct platform_device *pdev)
|
|
{
|
|
device_remove_file(rt8547_dev, &dev_attr_rear_flash);
|
|
device_remove_file(rt8547_dev, &dev_attr_rear_torch_flash);
|
|
device_destroy(camera_class, 0);
|
|
class_destroy(camera_class);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct of_device_id rt8547_dt_ids[] = {
|
|
{ .compatible = "rt8547",},
|
|
{},
|
|
};
|
|
/*MODULE_DEVICE_TABLE(of, rt8547_dt_ids);*/
|
|
#endif
|
|
|
|
static struct platform_driver rt8547_driver = {
|
|
.driver = {
|
|
.name = rt8547_NAME,
|
|
.owner = THIS_MODULE,
|
|
#ifdef CONFIG_OF
|
|
.of_match_table = rt8547_dt_ids,
|
|
#endif
|
|
},
|
|
.probe = rt8547_probe,
|
|
.remove = rt8547_remove,
|
|
};
|
|
|
|
static int __init rt8547_init(void)
|
|
{
|
|
return platform_driver_register(&rt8547_driver);
|
|
}
|
|
|
|
static void __exit rt8547_exit(void)
|
|
{
|
|
platform_driver_unregister(&rt8547_driver);
|
|
}
|
|
|
|
module_init(rt8547_init);
|
|
module_exit(rt8547_exit);
|
|
|
|
MODULE_AUTHOR("younghoon joo <yhoon.joo@samsung.com.com>");
|
|
MODULE_DESCRIPTION("RT8547 driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|