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/*
* Input Power Event -> APM Bridge
*
* Copyright (c) 2007 Richard Purdie
*
* 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.
*
*/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/apm-emulation.h>

static void system_power_event(unsigned int keycode)
{
switch (keycode) {
case KEY_SUSPEND:
apm_queue_event(APM_USER_SUSPEND);
pr_info("Requesting system suspend...\n");
break;
default:
break;
}
}

static void apmpower_event(struct input_handle *handle, unsigned int type,
unsigned int code, int value)
{
/* only react on key down events */
if (value != 1)
return;

switch (type) {
case EV_PWR:
system_power_event(code);
break;

default:
break;
}
}

static int apmpower_connect(struct input_handler *handler,
struct input_dev *dev,
const struct input_device_id *id)
{
struct input_handle *handle;
int error;

handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
if (!handle)
return -ENOMEM;

handle->dev = dev;
handle->handler = handler;
handle->name = "apm-power";

error = input_register_handle(handle);
if (error) {
pr_err("Failed to register input power handler, error %d\n",
error);
kfree(handle);
return error;
}

error = input_open_device(handle);
if (error) {
pr_err("Failed to open input power device, error %d\n", error);
input_unregister_handle(handle);
kfree(handle);
return error;
}

return 0;
}

static void apmpower_disconnect(struct input_handle *handle)
{
input_close_device(handle);
input_unregister_handle(handle);
kfree(handle);
}

static const struct input_device_id apmpower_ids[] = {
{
.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
.evbit = { BIT_MASK(EV_PWR) },
},
{ },
};

MODULE_DEVICE_TABLE(input, apmpower_ids);

static struct input_handler apmpower_handler = {
.event = apmpower_event,
.connect = apmpower_connect,
.disconnect = apmpower_disconnect,
.name = "apm-power",
.id_table = apmpower_ids,
};

static int __init apmpower_init(void)
{
return input_register_handler(&apmpower_handler);
}

static void __exit apmpower_exit(void)
{
input_unregister_handler(&apmpower_handler);
}

module_init(apmpower_init);
module_exit(apmpower_exit);

MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
MODULE_DESCRIPTION("Input Power Event -> APM Bridge");
MODULE_LICENSE("GPL");
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