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/*
* LED Kernel Timer Trigger
*
* Copyright 2005-2006 Openedhand Ltd.
*
* Author: Richard Purdie <rpurdie@openedhand.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/kernel.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/ctype.h>
#include <linux/leds.h>
#include "leds.h"
#ifdef CONFIG_TARGET_LOCALE_NA
#define CONFIG_RTC_LEDTRIG_TIMER 1//chief.rtc.ledtrig
#endif /* CONFIG_TARGET_LOCALE_NA */
#ifdef CONFIG_TARGET_LOCALE_NA
#if defined(CONFIG_RTC_LEDTRIG_TIMER)
#include <linux/android_alarm.h>
#include <linux/wakelock.h>
#include <asm/mach/time.h>
#include <linux/hrtimer.h>
#include <linux/hrtimer.h>
#endif
#if defined(CONFIG_RTC_LEDTRIG_TIMER)
static struct wake_lock ledtrig_rtc_timer_wakelock;
#endif
#endif /* CONFIG_TARGET_LOCALE_NA */
struct timer_trig_data {
int brightness_on; /* LED brightness during "on" period.
* (LED_OFF < brightness_on <= LED_FULL)
*/
unsigned long delay_on; /* milliseconds on */
unsigned long delay_off; /* milliseconds off */
struct timer_list timer;
#ifdef CONFIG_TARGET_LOCALE_NA
#if (CONFIG_RTC_LEDTRIG_TIMER==1)
struct alarm alarm;
struct wake_lock wakelock;
#elif (CONFIG_RTC_LEDTRIG_TIMER==2)
struct hrtimer hrtimer;
#endif
#endif /* CONFIG_TARGET_LOCALE_NA */
};
#ifdef CONFIG_TARGET_LOCALE_NA
#if (CONFIG_RTC_LEDTRIG_TIMER==1)
static int led_rtc_set_alarm(struct led_classdev *led_cdev, unsigned long msec)
{
struct timer_trig_data *timer_data = led_cdev->trigger_data;
ktime_t expire;
ktime_t now;
now = ktime_get_real();
expire = ktime_add(now, ns_to_ktime((u64)msec*1000*1000));
alarm_start_range(&timer_data->alarm, expire, expire);
if(msec < 1500) {
/* If expire time is less than 1.5s keep a wake lock to prevent constant
* suspend fail. RTC alarm fails to suspend if the earliest expiration
* time is less than a second. Keep the wakelock just a jiffy more than
* the expire time to prevent wake lock timeout. */
wake_lock_timeout(&timer_data->wakelock, (msec*HZ/1000)+1);
}
return 0;
}
static void led_rtc_timer_function(struct alarm *alarm)
{
struct timer_trig_data *timer_data = container_of(alarm, struct timer_trig_data, alarm);
/* let led_timer_function do the actual work */
mod_timer(&timer_data->timer, jiffies + 1);
}
#elif (CONFIG_RTC_LEDTRIG_TIMER==2)
extern int msm_pm_request_wakeup(struct hrtimer *timer);
static enum hrtimer_restart ledtrig_hrtimer_function(struct hrtimer *timer)
{
struct timer_trig_data *timer_data = container_of(timer, struct timer_trig_data, hrtimer);
/* let led_timer_function do the actual work */
mod_timer(&timer_data->timer, jiffies + 1);
}
#endif
#endif /* CONFIG_TARGET_LOCALE_NA */
static ssize_t led_delay_on_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
}
static ssize_t led_delay_on_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
int ret = -EINVAL;
char *after;
unsigned long state = simple_strtoul(buf, &after, 10);
size_t count = after - buf;
if (isspace(*after))
count++;
if (count == size) {
led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off);
led_cdev->blink_delay_on = state;
ret = count;
}
return ret;
}
static ssize_t led_delay_off_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
}
static ssize_t led_delay_off_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
int ret = -EINVAL;
char *after;
unsigned long state = simple_strtoul(buf, &after, 10);
size_t count = after - buf;
if (isspace(*after))
count++;
if (count == size) {
led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state);
led_cdev->blink_delay_off = state;
ret = count;
}
return ret;
}
static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
static void timer_trig_activate(struct led_classdev *led_cdev)
{
int rc;
led_cdev->trigger_data = NULL;
rc = device_create_file(led_cdev->dev, &dev_attr_delay_on);
if (rc)
return;
rc = device_create_file(led_cdev->dev, &dev_attr_delay_off);
if (rc)
goto err_out_delayon;
led_blink_set(led_cdev, &led_cdev->blink_delay_on,
&led_cdev->blink_delay_off);
led_cdev->trigger_data = (void *)1;
return;
err_out_delayon:
device_remove_file(led_cdev->dev, &dev_attr_delay_on);
}
static void timer_trig_deactivate(struct led_classdev *led_cdev)
{
if (led_cdev->trigger_data) {
device_remove_file(led_cdev->dev, &dev_attr_delay_on);
device_remove_file(led_cdev->dev, &dev_attr_delay_off);
}
/* Stop blinking */
led_brightness_set(led_cdev, LED_OFF);
}
static struct led_trigger timer_led_trigger = {
.name = "timer",
.activate = timer_trig_activate,
.deactivate = timer_trig_deactivate,
};
static int __init timer_trig_init(void)
{
return led_trigger_register(&timer_led_trigger);
}
static void __exit timer_trig_exit(void)
{
led_trigger_unregister(&timer_led_trigger);
}
module_init(timer_trig_init);
module_exit(timer_trig_exit);
MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
MODULE_DESCRIPTION("Timer LED trigger");
MODULE_LICENSE("GPL");
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