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/*
* Copyright (C) 2013 Spreadtrum Communications Inc.
*
* 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/input-hook.h>
static enum hrtimer_restart trigger_watch_event_timer_cb(struct hrtimer *timer)
{
struct trigger_watch_event *event = container_of(timer, struct trigger_watch_event, timer);
enum hrtimer_restart restart = HRTIMER_NORESTART;
pr_info("< %s > trigger-watch event timer timeout %dms\n", event->name, event->period);
if (event->trigger_watch_event_cb)
event->trigger_watch_event_cb(event->private);
if (event->repeated) { /* repeat timer */
hrtimer_forward_now(timer, ktime_set(event->period / 1000, (event->period % 1000) * 1000000));
restart = HRTIMER_RESTART;
}
return restart;
}
int trigger_watch_event_stop(struct trigger_watch_event *event)
{
if (!event->disable_timer) {
hrtimer_cancel(&event->timer);
}
if (!event->disable_clk_source) {
u64 delta = (local_clock() - event->last_ts);
if (delta > ((u64)event->period) * 1000000) {
pr_info("< %s > trigger-watch event clock timeout %d / %lld\n", event->name, event->period, delta);
if (event->trigger_watch_event_cb)
event->trigger_watch_event_cb(event->private);
}
}
return 0;
}
EXPORT_SYMBOL(trigger_watch_event_stop);
void trigger_watch_event_start(struct trigger_watch_event *event, int ms)
{
if (!event->initialized) {
event->initialized = 1;
if (!event->disable_timer) {
hrtimer_init(&event->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
event->timer.function = trigger_watch_event_timer_cb;
}
}
event->repeated = !!(ms & TRIGGER_WATCH_EVENT_REPEATED);
event->period = (ms & ~TRIGGER_WATCH_EVENT_REPEATED);
event->last_ts = local_clock();
trigger_watch_event_stop(event);
if (!event->disable_timer) {
hrtimer_start(&event->timer, ktime_set(event->period / 1000, (event->period % 1000) * 1000000), HRTIMER_MODE_REL);
}
}
EXPORT_SYMBOL(trigger_watch_event_start);
static int hook_power = 1;
static struct ctl_table_header *hook_power_sysctl_hdr = NULL;
void input_hook_init(void)
{
static ctl_table hook_power_sysctl_table[] = {
{
.procname = "hook_power_enable",
.data = &hook_power,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{}
};
static ctl_table hook_power_sysctl_root[] = {
{
.procname = "kernel",
.mode = 0555,
.child = hook_power_sysctl_table,
},
{}
};
hook_power_sysctl_hdr = register_sysctl_table(hook_power_sysctl_root);
if (!hook_power_sysctl_hdr) {
pr_err("unable to create input_power entry\n");
return -ENOMEM;
}
return 0;
}
void input_hook_exit(void)
{
if (hook_power_sysctl_hdr)
unregister_sysctl_table(hook_power_sysctl_hdr);
}
extern void sprd_pbint_7s_reset_disable(void);
static void trigger_watch_powerkey(void *private)
{
unsigned long flags;
local_irq_save(flags);
#ifdef CONFIG_MAGIC_SYSRQ
handle_sysrq('m');
handle_sysrq('w');
#endif
sprd_pbint_7s_reset_disable();
pr_warn("!!!! trigger_powerkey !!!! do panic\n");
panic("!!!! trigger_powerkey !!!! do panic");
pr_err("%s should never reach here!\n", __func__);
}
void input_report_key_hook(struct input_dev *dev, unsigned int code, int value)
{
if (hook_power && code == KEY_POWER) {
static struct trigger_watch_event twe = {
.name = "power key",
.private = NULL, /* like dev */
.trigger_watch_event_cb = trigger_watch_powerkey,
};
static int pre_value = 0;
if (value != pre_value) {
if (value)
trigger_watch_event_start(&twe, 6 * 1000);
else
trigger_watch_event_stop(&twe);
} else {
pr_warn("Key %d%c is dithering.", code, value ? 'D' : 'U');
}
pre_value = value;
}
}
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