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a155-U-u1/kernel-5.10/drivers/misc/mediatek/flashlight/flashlights-mt6360.c
physwizz 99537be4e2 first
2024-03-11 06:53:12 +11:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2019 MediaTek Inc.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
#include <linux/types.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/hrtimer.h>
#include <linux/ktime.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/power_supply.h>
#include "richtek/rt-flashlight.h"
#include "flashlight-core.h"
#include "flashlight-dt.h"
/* device tree should be defined in flashlight-dt.h */
#ifndef MT6360_DTNAME
#define MT6360_DTNAME "mediatek,flashlights_mt6360"
#endif
#define MT6360_NAME "flashlights-mt6360"
/* define channel, level */
#define MT6360_CHANNEL_NUM 2
#define MT6360_CHANNEL_CH1 0
#define MT6360_CHANNEL_CH2 1
#define MT6360_CHANNEL_ALL 2
#define MT6360_NONE (-1)
#define MT6360_DISABLE 0
#define MT6360_ENABLE 1
#define MT6360_ENABLE_TORCH 1
#define MT6360_ENABLE_FLASH 2
#define MT6360_LEVEL_NUM 38
#define MT6360_LEVEL_TORCH 16
#define MT6360_LEVEL_FLASH MT6360_LEVEL_NUM
#define MT6360_WDT_TIMEOUT 1248 /* ms */
#define MT6360_HW_TIMEOUT 400 /* ms */
/* define mutex, work queue and timer */
static DEFINE_MUTEX(mt6360_mutex);
static struct work_struct mt6360_work_ch1;
static struct work_struct mt6360_work_ch2;
static struct hrtimer mt6360_timer_ch1;
static struct hrtimer mt6360_timer_ch2;
static unsigned int mt6360_timeout_ms[MT6360_CHANNEL_NUM];
/* define usage count */
static int use_count;
static int fd_use_count;
/* define RTK flashlight device */
static struct flashlight_device *flashlight_dev_ch1;
static struct flashlight_device *flashlight_dev_ch2;
#define RT_FLED_DEVICE_CH1 "mt-flash-led1"
#define RT_FLED_DEVICE_CH2 "mt-flash-led2"
/* is decrease voltage */
static int is_decrease_voltage;
/* platform data */
struct mt6360_platform_data {
int channel_num;
struct flashlight_device_id *dev_id;
};
/******************************************************************************
* Charger power supply class
*****************************************************************************/
static int mt6360_high_voltage_supply(int enable)
{
union power_supply_propval prop;
static struct power_supply *chg_psy;
int ret;
if (chg_psy == NULL)
chg_psy = power_supply_get_by_name("mtk-master-charger");
if (chg_psy == NULL || IS_ERR(chg_psy)) {
pr_notice("%s Couldn't get chg_psy\n", __func__);
ret = -1;
} else {
prop.intval = enable;
ret = power_supply_set_property(chg_psy,
POWER_SUPPLY_PROP_VOLTAGE_MAX, &prop);
pr_notice("%s enable_hv:%d\n", __func__, prop.intval);
power_supply_changed(chg_psy);
}
return ret;
}
/******************************************************************************
* mt6360 operations
*****************************************************************************/
static const int mt6360_current[MT6360_LEVEL_NUM] = {
25, 50, 75, 100, 125, 150, 175, 200, 225, 250,
275, 300, 325, 350, 375, 400, 450, 500, 550, 600,
650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100,
1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500
};
static const unsigned char mt6360_torch_level[MT6360_LEVEL_TORCH] = {
0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E, 0x10, 0x12,
0x14, 0x16, 0x18, 0x1A, 0x1C, 0x1E
};
/* 0x00~0x74 6.25mA/step 0x75~0xB1 12.5mA/step */
static const unsigned char mt6360_strobe_level[MT6360_LEVEL_FLASH] = {
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x20, 0x24,
0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C, 0x44, 0x4C, 0x54, 0x5C,
0x64, 0x6C, 0x74, 0x78, 0x7C, 0x80, 0x84, 0x88, 0x8C, 0x90,
0x94, 0x98, 0x9C, 0xA0, 0xA4, 0xA8, 0xAC, 0xB0
};
static int mt6360_decouple_mode;
static int mt6360_en_ch1;
static int mt6360_en_ch2;
static int mt6360_level_ch1;
static int mt6360_level_ch2;
static int mt6360_is_charger_ready(void)
{
if (flashlight_is_ready(flashlight_dev_ch1) &&
flashlight_is_ready(flashlight_dev_ch2))
return FLASHLIGHT_CHARGER_READY;
else
return FLASHLIGHT_CHARGER_NOT_READY;
}
static int mt6360_is_torch(int level)
{
if (level >= MT6360_LEVEL_TORCH)
return -1;
return 0;
}
static int mt6360_verify_level(int level)
{
if (level < 0)
level = 0;
else if (level >= MT6360_LEVEL_NUM)
level = MT6360_LEVEL_NUM - 1;
return level;
}
/* flashlight enable function */
static int mt6360_enable(void)
{
int ret = 0;
enum flashlight_mode mode = FLASHLIGHT_MODE_TORCH;
if (!flashlight_dev_ch1 || !flashlight_dev_ch2) {
pr_info("Failed to enable since no flashlight device.\n");
return -1;
}
/* set flash mode if any channel is flash mode */
if ((mt6360_en_ch1 == MT6360_ENABLE_FLASH)
|| (mt6360_en_ch2 == MT6360_ENABLE_FLASH))
mode = FLASHLIGHT_MODE_FLASH;
pr_debug("enable(%d,%d), mode:%d.\n",
mt6360_en_ch1, mt6360_en_ch2, mode);
/* enable channel 1 and channel 2 */
if (mt6360_decouple_mode == FLASHLIGHT_SCENARIO_COUPLE &&
mt6360_en_ch1 != MT6360_DISABLE &&
mt6360_en_ch2 != MT6360_DISABLE) {
pr_info("dual flash mode\n");
if (mode == FLASHLIGHT_MODE_TORCH)
ret |= flashlight_set_mode(
flashlight_dev_ch1, FLASHLIGHT_MODE_DUAL_TORCH);
else
ret |= flashlight_set_mode(
flashlight_dev_ch1, FLASHLIGHT_MODE_DUAL_FLASH);
} else {
if (mt6360_en_ch1)
ret |= flashlight_set_mode(
flashlight_dev_ch1, mode);
else if (mt6360_decouple_mode == FLASHLIGHT_SCENARIO_COUPLE)
ret |= flashlight_set_mode(
flashlight_dev_ch1, FLASHLIGHT_MODE_OFF);
if (mt6360_en_ch2)
ret |= flashlight_set_mode(
flashlight_dev_ch2, mode);
else if (mt6360_decouple_mode == FLASHLIGHT_SCENARIO_COUPLE)
ret |= flashlight_set_mode(
flashlight_dev_ch2, FLASHLIGHT_MODE_OFF);
}
if (ret < 0)
pr_info("Failed to enable.\n");
return ret;
}
/* flashlight disable function */
static int mt6360_disable_ch1(void)
{
int ret = 0;
pr_debug("disable_ch1.\n");
if (!flashlight_dev_ch1) {
pr_info("Failed to disable since no flashlight device.\n");
return -1;
}
ret |= flashlight_set_mode(flashlight_dev_ch1, FLASHLIGHT_MODE_OFF);
if (ret < 0)
pr_info("Failed to disable.\n");
return ret;
}
static int mt6360_disable_ch2(void)
{
int ret = 0;
pr_debug("disable_ch2.\n");
if (!flashlight_dev_ch2) {
pr_info("Failed to disable since no flashlight device.\n");
return -1;
}
ret |= flashlight_set_mode(flashlight_dev_ch2, FLASHLIGHT_MODE_OFF);
if (ret < 0)
pr_info("Failed to disable.\n");
return ret;
}
static int mt6360_disable_all(void)
{
int ret = 0;
pr_debug("disable_ch1.\n");
if (!flashlight_dev_ch1) {
pr_info("Failed to disable since no flashlight device.\n");
return -1;
}
ret |= flashlight_set_mode(flashlight_dev_ch1,
FLASHLIGHT_MODE_DUAL_OFF);
if (ret < 0)
pr_info("Failed to disable.\n");
return ret;
}
static int mt6360_disable(int channel)
{
int ret = 0;
if (channel == MT6360_CHANNEL_CH1)
ret = mt6360_disable_ch1();
else if (channel == MT6360_CHANNEL_CH2)
ret = mt6360_disable_ch2();
else if (channel == MT6360_CHANNEL_ALL)
ret = mt6360_disable_all();
else {
pr_info("Error channel\n");
return -1;
}
return ret;
}
/* set flashlight level */
static int mt6360_set_level_ch1(int level)
{
level = mt6360_verify_level(level);
mt6360_level_ch1 = level;
if (!flashlight_dev_ch1) {
pr_info("Failed to set ht level since no flashlight device.\n");
return -1;
}
/* set brightness level */
if (!mt6360_is_torch(level))
flashlight_set_torch_brightness(
flashlight_dev_ch1, mt6360_torch_level[level]);
flashlight_set_strobe_brightness(
flashlight_dev_ch1, mt6360_strobe_level[level]);
return 0;
}
static int mt6360_set_level_ch2(int level)
{
level = mt6360_verify_level(level);
mt6360_level_ch2 = level;
if (!flashlight_dev_ch2) {
pr_info("Failed to set lt level since no flashlight device.\n");
return -1;
}
/* set brightness level */
if (!mt6360_is_torch(level))
flashlight_set_torch_brightness(
flashlight_dev_ch2, mt6360_torch_level[level]);
flashlight_set_strobe_brightness(
flashlight_dev_ch2, mt6360_strobe_level[level]);
return 0;
}
static int mt6360_set_level(int channel, int level)
{
if (channel == MT6360_CHANNEL_CH1)
mt6360_set_level_ch1(level);
else if (channel == MT6360_CHANNEL_CH2)
mt6360_set_level_ch2(level);
else {
pr_info("Error channel\n");
return -1;
}
return 0;
}
static int mt6360_set_scenario(int scenario)
{
/* set decouple mode */
mt6360_decouple_mode = scenario & FLASHLIGHT_SCENARIO_DECOUPLE_MASK;
/* notify charger to increase or decrease voltage */
mutex_lock(&mt6360_mutex);
if (scenario & FLASHLIGHT_SCENARIO_CAMERA_MASK) {
if (!is_decrease_voltage) {
pr_info("Decrease voltage level.\n");
mt6360_high_voltage_supply(0);
is_decrease_voltage = 1;
}
} else {
if (is_decrease_voltage) {
pr_info("Increase voltage level.\n");
mt6360_high_voltage_supply(1);
is_decrease_voltage = 0;
}
}
mutex_unlock(&mt6360_mutex);
return 0;
}
/* flashlight init */
static int mt6360_init(void)
{
/* clear flashlight state */
mt6360_en_ch1 = MT6360_NONE;
mt6360_en_ch2 = MT6360_NONE;
/* clear decouple mode */
mt6360_decouple_mode = FLASHLIGHT_SCENARIO_COUPLE;
/* clear charger status */
is_decrease_voltage = 0;
return 0;
}
/* flashlight uninit */
static int mt6360_uninit(void)
{
int ret;
/* clear flashlight state */
mt6360_en_ch1 = MT6360_NONE;
mt6360_en_ch2 = MT6360_NONE;
/* clear decouple mode */
mt6360_decouple_mode = FLASHLIGHT_SCENARIO_COUPLE;
/* clear charger status */
is_decrease_voltage = 0;
ret = mt6360_disable(MT6360_CHANNEL_ALL);
return ret;
}
/******************************************************************************
* Timer and work queue
*****************************************************************************/
static void mt6360_work_disable_ch1(struct work_struct *data)
{
pr_debug("ht work queue callback\n");
mt6360_disable(MT6360_CHANNEL_CH1);
}
static void mt6360_work_disable_ch2(struct work_struct *data)
{
pr_debug("lt work queue callback\n");
mt6360_disable(MT6360_CHANNEL_CH2);
}
static enum hrtimer_restart mt6360_timer_func_ch1(struct hrtimer *timer)
{
schedule_work(&mt6360_work_ch1);
return HRTIMER_NORESTART;
}
static enum hrtimer_restart mt6360_timer_func_ch2(struct hrtimer *timer)
{
schedule_work(&mt6360_work_ch2);
return HRTIMER_NORESTART;
}
static int mt6360_timer_start(int channel, ktime_t ktime)
{
if (channel == MT6360_CHANNEL_CH1)
hrtimer_start(&mt6360_timer_ch1, ktime, HRTIMER_MODE_REL);
else if (channel == MT6360_CHANNEL_CH2)
hrtimer_start(&mt6360_timer_ch2, ktime, HRTIMER_MODE_REL);
else {
pr_info("Error channel\n");
return -1;
}
return 0;
}
static int mt6360_timer_cancel(int channel)
{
if (channel == MT6360_CHANNEL_CH1)
hrtimer_cancel(&mt6360_timer_ch1);
else if (channel == MT6360_CHANNEL_CH2)
hrtimer_cancel(&mt6360_timer_ch2);
else {
pr_info("Error channel\n");
return -1;
}
return 0;
}
/******************************************************************************
* Flashlight operation wrapper function
*****************************************************************************/
static int mt6360_operate(int channel, int enable)
{
ktime_t ktime;
unsigned int s;
unsigned int ns;
/* setup enable/disable */
if (channel == MT6360_CHANNEL_CH1) {
mt6360_en_ch1 = enable;
if (mt6360_en_ch1)
if (mt6360_is_torch(mt6360_level_ch1))
mt6360_en_ch1 = MT6360_ENABLE_FLASH;
} else if (channel == MT6360_CHANNEL_CH2) {
mt6360_en_ch2 = enable;
if (mt6360_en_ch2)
if (mt6360_is_torch(mt6360_level_ch2))
mt6360_en_ch2 = MT6360_ENABLE_FLASH;
} else {
pr_info("Error channel\n");
return -1;
}
/* decouple mode */
if (mt6360_decouple_mode) {
if (channel == MT6360_CHANNEL_CH1) {
mt6360_en_ch2 = MT6360_DISABLE;
mt6360_timeout_ms[MT6360_CHANNEL_CH2] = 0;
} else if (channel == MT6360_CHANNEL_CH2) {
mt6360_en_ch1 = MT6360_DISABLE;
mt6360_timeout_ms[MT6360_CHANNEL_CH1] = 0;
}
}
pr_debug("en_ch(%d,%d), decouple:%d\n",
mt6360_en_ch1, mt6360_en_ch2, mt6360_decouple_mode);
/* operate flashlight and setup timer */
if ((mt6360_en_ch1 != MT6360_NONE) && (mt6360_en_ch2 != MT6360_NONE)) {
if ((mt6360_en_ch1 == MT6360_DISABLE) &&
(mt6360_en_ch2 == MT6360_DISABLE)) {
if (mt6360_decouple_mode) {
if (channel == MT6360_CHANNEL_CH1) {
mt6360_disable(MT6360_CHANNEL_CH1);
mt6360_timer_cancel(MT6360_CHANNEL_CH1);
} else if (channel == MT6360_CHANNEL_CH2) {
mt6360_disable(MT6360_CHANNEL_CH2);
mt6360_timer_cancel(MT6360_CHANNEL_CH2);
}
} else {
mt6360_disable(MT6360_CHANNEL_ALL);
mt6360_timer_cancel(MT6360_CHANNEL_CH1);
mt6360_timer_cancel(MT6360_CHANNEL_CH2);
}
} else {
if (mt6360_timeout_ms[MT6360_CHANNEL_CH1] &&
mt6360_en_ch1 != MT6360_DISABLE) {
s = mt6360_timeout_ms[MT6360_CHANNEL_CH1] /
1000;
ns = mt6360_timeout_ms[MT6360_CHANNEL_CH1] %
1000 * 1000000;
ktime = ktime_set(s, ns);
mt6360_timer_start(MT6360_CHANNEL_CH1, ktime);
}
if (mt6360_timeout_ms[MT6360_CHANNEL_CH2] &&
mt6360_en_ch2 != MT6360_DISABLE) {
s = mt6360_timeout_ms[MT6360_CHANNEL_CH2] /
1000;
ns = mt6360_timeout_ms[MT6360_CHANNEL_CH2] %
1000 * 1000000;
ktime = ktime_set(s, ns);
mt6360_timer_start(MT6360_CHANNEL_CH2, ktime);
}
mt6360_enable();
}
/* clear flashlight state */
mt6360_en_ch1 = MT6360_NONE;
mt6360_en_ch2 = MT6360_NONE;
}
return 0;
}
/******************************************************************************
* Flashlight operations
*****************************************************************************/
static int mt6360_ioctl(unsigned int cmd, unsigned long arg)
{
struct flashlight_dev_arg *fl_arg;
int channel;
fl_arg = (struct flashlight_dev_arg *)arg;
channel = fl_arg->channel;
/* verify channel */
if (channel < 0 || channel >= MT6360_CHANNEL_NUM) {
pr_info("Failed with error channel\n");
return -EINVAL;
}
switch (cmd) {
case FLASH_IOC_SET_TIME_OUT_TIME_MS:
pr_debug("FLASH_IOC_SET_TIME_OUT_TIME_MS(%d): %d\n",
channel, (int)fl_arg->arg);
mt6360_timeout_ms[channel] = fl_arg->arg;
break;
case FLASH_IOC_SET_DUTY:
pr_debug("FLASH_IOC_SET_DUTY(%d): %d\n",
channel, (int)fl_arg->arg);
mt6360_set_level(channel, fl_arg->arg);
break;
case FLASH_IOC_SET_SCENARIO:
pr_debug("FLASH_IOC_SET_SCENARIO(%d): %d\n",
channel, (int)fl_arg->arg);
mt6360_set_scenario(fl_arg->arg);
break;
case FLASH_IOC_SET_ONOFF:
pr_debug("FLASH_IOC_SET_ONOFF(%d): %d\n",
channel, (int)fl_arg->arg);
mt6360_operate(channel, fl_arg->arg);
break;
case FLASH_IOC_IS_CHARGER_READY:
pr_debug("FLASH_IOC_IS_CHARGER_READY(%d)\n", channel);
fl_arg->arg = mt6360_is_charger_ready();
pr_debug("FLASH_IOC_IS_CHARGER_READY(%d)\n", fl_arg->arg);
break;
case FLASH_IOC_GET_DUTY_NUMBER:
pr_debug("FLASH_IOC_GET_DUTY_NUMBER(%d)\n", channel);
fl_arg->arg = MT6360_LEVEL_NUM;
break;
case FLASH_IOC_GET_MAX_TORCH_DUTY:
pr_debug("FLASH_IOC_GET_MAX_TORCH_DUTY(%d)\n", channel);
fl_arg->arg = MT6360_LEVEL_TORCH - 1;
break;
case FLASH_IOC_GET_DUTY_CURRENT:
fl_arg->arg = mt6360_verify_level(fl_arg->arg);
pr_debug("FLASH_IOC_GET_DUTY_CURRENT(%d): %d\n",
channel, (int)fl_arg->arg);
fl_arg->arg = mt6360_current[fl_arg->arg];
break;
case FLASH_IOC_GET_HW_TIMEOUT:
pr_debug("FLASH_IOC_GET_HW_TIMEOUT(%d)\n", channel);
fl_arg->arg = MT6360_HW_TIMEOUT;
break;
default:
pr_info("No such command and arg(%d): (%d, %d)\n",
channel, _IOC_NR(cmd), (int)fl_arg->arg);
return -ENOTTY;
}
return 0;
}
static int mt6360_open(void)
{
/* Move to set driver for saving power */
mutex_lock(&mt6360_mutex);
fd_use_count++;
pr_debug("open driver: %d\n", fd_use_count);
mutex_unlock(&mt6360_mutex);
return 0;
}
static int mt6360_release(void)
{
/* Move to set driver for saving power */
mutex_lock(&mt6360_mutex);
fd_use_count--;
pr_debug("close driver: %d\n", fd_use_count);
/* If camera NE, we need to enable pe by ourselves*/
if (fd_use_count == 0 && is_decrease_voltage) {
pr_info("Increase voltage level.\n");
mt6360_high_voltage_supply(1);
is_decrease_voltage = 0;
}
mutex_unlock(&mt6360_mutex);
return 0;
}
static int mt6360_set_driver(int set)
{
int ret = 0;
/* set chip and usage count */
mutex_lock(&mt6360_mutex);
if (set) {
if (!use_count)
ret = mt6360_init();
use_count++;
pr_debug("Set driver: %d\n", use_count);
} else {
use_count--;
if (!use_count)
ret = mt6360_uninit();
if (use_count < 0)
use_count = 0;
pr_debug("Unset driver: %d\n", use_count);
}
mutex_unlock(&mt6360_mutex);
return ret;
}
static ssize_t mt6360_strobe_store(struct flashlight_arg arg)
{
mt6360_set_driver(1);
if (arg.decouple)
mt6360_set_scenario(
FLASHLIGHT_SCENARIO_CAMERA |
FLASHLIGHT_SCENARIO_DECOUPLE);
else
mt6360_set_scenario(
FLASHLIGHT_SCENARIO_CAMERA |
FLASHLIGHT_SCENARIO_COUPLE);
mt6360_set_level(arg.channel, arg.level);
mt6360_timeout_ms[arg.channel] = 0;
if (arg.level < 0)
mt6360_operate(arg.channel, MT6360_DISABLE);
else
mt6360_operate(arg.channel, MT6360_ENABLE);
msleep(arg.dur);
if (arg.decouple)
mt6360_set_scenario(
FLASHLIGHT_SCENARIO_FLASHLIGHT |
FLASHLIGHT_SCENARIO_DECOUPLE);
else
mt6360_set_scenario(
FLASHLIGHT_SCENARIO_FLASHLIGHT |
FLASHLIGHT_SCENARIO_COUPLE);
mt6360_operate(arg.channel, MT6360_DISABLE);
mt6360_set_driver(0);
return 0;
}
static struct flashlight_operations mt6360_ops = {
mt6360_open,
mt6360_release,
mt6360_ioctl,
mt6360_strobe_store,
mt6360_set_driver
};
/******************************************************************************
* Platform device and driver
*****************************************************************************/
static int mt6360_parse_dt(struct device *dev,
struct mt6360_platform_data *pdata)
{
struct device_node *np, *cnp;
u32 decouple = 0;
int i = 0;
if (!dev || !dev->of_node || !pdata)
return -ENODEV;
np = dev->of_node;
pdata->channel_num = of_get_child_count(np);
if (!pdata->channel_num) {
pr_info("Parse no dt, node.\n");
return 0;
}
pr_info("Channel number(%d).\n", pdata->channel_num);
if (of_property_read_u32(np, "decouple", &decouple))
pr_info("Parse no dt, decouple.\n");
pdata->dev_id = devm_kzalloc(dev,
pdata->channel_num *
sizeof(struct flashlight_device_id),
GFP_KERNEL);
if (!pdata->dev_id)
return -ENOMEM;
for_each_child_of_node(np, cnp) {
if (of_property_read_u32(cnp, "type", &pdata->dev_id[i].type))
goto err_node_put;
if (of_property_read_u32(cnp, "ct", &pdata->dev_id[i].ct))
goto err_node_put;
if (of_property_read_u32(cnp, "part", &pdata->dev_id[i].part))
goto err_node_put;
snprintf(pdata->dev_id[i].name, FLASHLIGHT_NAME_SIZE,
MT6360_NAME);
pdata->dev_id[i].channel = i;
pdata->dev_id[i].decouple = decouple;
pr_info("Parse dt (type,ct,part,name,channel,decouple)=(%d,%d,%d,%s,%d,%d).\n",
pdata->dev_id[i].type, pdata->dev_id[i].ct,
pdata->dev_id[i].part, pdata->dev_id[i].name,
pdata->dev_id[i].channel,
pdata->dev_id[i].decouple);
i++;
}
return 0;
err_node_put:
of_node_put(cnp);
return -EINVAL;
}
static int mt6360_probe(struct platform_device *pdev)
{
struct mt6360_platform_data *pdata = dev_get_platdata(&pdev->dev);
int ret;
int i;
pr_debug("Probe start.\n");
/* parse dt */
if (!pdata) {
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
pdev->dev.platform_data = pdata;
ret = mt6360_parse_dt(&pdev->dev, pdata);
if (ret)
return ret;
}
/* init work queue */
INIT_WORK(&mt6360_work_ch1, mt6360_work_disable_ch1);
INIT_WORK(&mt6360_work_ch2, mt6360_work_disable_ch2);
/* init timer */
hrtimer_init(&mt6360_timer_ch1, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
mt6360_timer_ch1.function = mt6360_timer_func_ch1;
hrtimer_init(&mt6360_timer_ch2, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
mt6360_timer_ch2.function = mt6360_timer_func_ch2;
mt6360_timeout_ms[MT6360_CHANNEL_CH1] = 600;
mt6360_timeout_ms[MT6360_CHANNEL_CH2] = 600;
/* clear attributes */
use_count = 0;
fd_use_count = 0;
is_decrease_voltage = 0;
/* get RTK flashlight handler */
flashlight_dev_ch1 = find_flashlight_by_name(RT_FLED_DEVICE_CH1);
if (!flashlight_dev_ch1) {
pr_info("Failed to get ht flashlight device.\n");
return -EFAULT;
}
flashlight_dev_ch2 = find_flashlight_by_name(RT_FLED_DEVICE_CH2);
if (!flashlight_dev_ch2) {
pr_info("Failed to get lt flashlight device.\n");
return -EFAULT;
}
/* setup strobe mode timeout */
if (flashlight_set_strobe_timeout(flashlight_dev_ch1,
MT6360_HW_TIMEOUT, MT6360_HW_TIMEOUT + 200) < 0)
pr_info("Failed to set strobe timeout.\n");
/* register flashlight device */
if (pdata->channel_num) {
for (i = 0; i < pdata->channel_num; i++)
if (flashlight_dev_register_by_device_id(
&pdata->dev_id[i],
&mt6360_ops))
return -EFAULT;
} else {
if (flashlight_dev_register(MT6360_NAME, &mt6360_ops))
return -EFAULT;
}
pr_debug("Probe done.\n");
return 0;
}
static int mt6360_remove(struct platform_device *pdev)
{
struct mt6360_platform_data *pdata = dev_get_platdata(&pdev->dev);
int i;
pr_debug("Remove start.\n");
pdev->dev.platform_data = NULL;
/* unregister flashlight device */
if (pdata && pdata->channel_num)
for (i = 0; i < pdata->channel_num; i++)
flashlight_dev_unregister_by_device_id(
&pdata->dev_id[i]);
else
flashlight_dev_unregister(MT6360_NAME);
/* flush work queue */
flush_work(&mt6360_work_ch1);
flush_work(&mt6360_work_ch2);
/* clear RTK flashlight device */
flashlight_dev_ch1 = NULL;
flashlight_dev_ch2 = NULL;
pr_debug("Remove done.\n");
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id mt6360_of_match[] = {
{.compatible = MT6360_DTNAME},
{},
};
MODULE_DEVICE_TABLE(of, mt6360_of_match);
#else
static struct platform_device mt6360_platform_device[] = {
{
.name = MT6360_NAME,
.id = 0,
.dev = {}
},
{}
};
MODULE_DEVICE_TABLE(platform, mt6360_platform_device);
#endif
static struct platform_driver mt6360_platform_driver = {
.probe = mt6360_probe,
.remove = mt6360_remove,
.driver = {
.name = MT6360_NAME,
.owner = THIS_MODULE,
#ifdef CONFIG_OF
.of_match_table = mt6360_of_match,
#endif
},
};
static int __init flashlight_mt6360_init(void)
{
int ret;
pr_debug("Init start.\n");
#ifndef CONFIG_OF
ret = platform_device_register(&mt6360_platform_device);
if (ret) {
pr_info("Failed to register platform device\n");
return ret;
}
#endif
ret = platform_driver_register(&mt6360_platform_driver);
if (ret) {
pr_info("Failed to register platform driver\n");
return ret;
}
pr_debug("Init done.\n");
return 0;
}
static void __exit flashlight_mt6360_exit(void)
{
pr_debug("Exit start.\n");
platform_driver_unregister(&mt6360_platform_driver);
pr_debug("Exit done.\n");
}
/* replace module_init() since conflict in kernel init process */
late_initcall(flashlight_mt6360_init);
module_exit(flashlight_mt6360_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Roger Wang <Roger-HY.Wang@mediatek.com>");
MODULE_DESCRIPTION("MTK Flashlight MT6360 Driver");
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