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/*
* Screen wake timeout
* Copyright (C) 2014 flar2 <asegaert@gmail.com>
*
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/android_alarm.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/sysfs.h>
#include <linux/init.h>
#include <linux/earlysuspend.h>
#include <linux/sweep2wake.h>
#define WAKE_TIMEOUT_MAJOR_VERSION 2
#define WAKE_TIMEOUT_MINOR_VERSION 0
#define WAKEFUNC "wakefunc"
static unsigned int wake_timeout = 0;
static struct alarm wakefunc_rtc;
static bool wakefunc_triggered = false;
void ext_elan_ktf3k_ts_set_power_state(void);
static void wake_presspwr(struct work_struct * wake_presspwr_work) {
wakefunc_triggered = true;
ext_elan_ktf3k_ts_set_power_state();
return;
}
static DECLARE_WORK(wake_presspwr_work, wake_presspwr);
static void wake_pwrtrigger(void) {
schedule_work(&wake_presspwr_work);
return;
}
static void wakefunc_rtc_start(void)
{
ktime_t wakeup_time;
ktime_t curr_time;
wakefunc_triggered = false;
curr_time = alarm_get_elapsed_realtime();
wakeup_time = ktime_add_us(curr_time,
(wake_timeout * USEC_PER_MSEC * 60000));
alarm_start_range(&wakefunc_rtc, wakeup_time,
wakeup_time);
pr_debug("%s: Current Time: %ld, Alarm set to: %ld\n",
WAKEFUNC,
ktime_to_timeval(curr_time).tv_sec,
ktime_to_timeval(wakeup_time).tv_sec);
pr_info("%s: Timeout started for %u minutes\n", WAKEFUNC,
wake_timeout);
}
static void wakefunc_rtc_cancel(void)
{
int ret;
wakefunc_triggered = false;
ret = alarm_cancel(&wakefunc_rtc);
if (ret)
pr_info("%s: Timeout canceled\n", WAKEFUNC);
else
pr_info("%s: Nothing to cancel\n",
WAKEFUNC);
}
static void wakefunc_rtc_callback(struct alarm *al)
{
struct timeval ts;
ts = ktime_to_timeval(alarm_get_elapsed_realtime());
wake_pwrtrigger();
pr_debug("%s: Time of alarm expiry: %ld\n", WAKEFUNC,
ts.tv_sec);
}
//sysfs
static ssize_t show_wake_timeout(struct device *dev,
struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", wake_timeout);
}
static ssize_t store_wake_timeout(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
unsigned int input;
int ret;
ret = sscanf(buf, "%u", &input);
if (ret != 1) {
return -EINVAL;
}
wake_timeout = input;
return count;
}
static DEVICE_ATTR(wake_timeout, (S_IWUSR|S_IRUGO),
show_wake_timeout, store_wake_timeout);
extern struct kobject *android_touch_kobj;
static void wake_timeout_early_suspend(struct early_suspend *h)
{
if (!pwr_key_pressed && !lid_closed && !wakefunc_triggered && wake_timeout > 0)
wakefunc_rtc_start();
return;
}
static void wake_timeout_late_resume(struct early_suspend *h)
{
wakefunc_rtc_cancel();
return;
}
static struct early_suspend wake_timeout_early_suspend_driver = {
.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 10,
.suspend = wake_timeout_early_suspend,
.resume = wake_timeout_late_resume,
};
static int __init wake_timeout_init(void)
{
int rc;
pr_info("wake_timeout version %d.%d\n",
WAKE_TIMEOUT_MAJOR_VERSION,
WAKE_TIMEOUT_MINOR_VERSION);
alarm_init(&wakefunc_rtc, ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
wakefunc_rtc_callback);
rc = sysfs_create_file(android_touch_kobj, &dev_attr_wake_timeout.attr);
if (rc) {
pr_warn("%s: sysfs_create_file failed for wake_timeout\n", __func__);
}
register_early_suspend(&wake_timeout_early_suspend_driver);
return 0;
}
static void __exit wake_timeout_exit(void)
{
alarm_cancel(&wakefunc_rtc);
return;
}
MODULE_AUTHOR("flar2 <asegaert@gmail.com>");
MODULE_DESCRIPTION("'wake_timeout' - Disable screen wake functions after timeout");
MODULE_LICENSE("GPL v2");
module_init(wake_timeout_init);
module_exit(wake_timeout_exit);
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