[linux.git] / drivers / input / apm-power.c

/*
 *  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 <[email protected]>");
MODULE_DESCRIPTION("Input Power Event -> APM Bridge");
MODULE_LICENSE("GPL");
Commit	Line	Data
e17bb1de RP	1	/*
	2	* Input Power Event -> APM Bridge
	3	*
	4	* Copyright (c) 2007 Richard Purdie
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	*/
	11
da0c4901 JP	12	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
da0c4901 JP	13
e17bb1de RP	14	#include <linux/module.h>
	15	#include <linux/input.h>
	16	#include <linux/slab.h>
	17	#include <linux/init.h>
	18	#include <linux/tty.h>
	19	#include <linux/delay.h>
	20	#include <linux/pm.h>
	21	#include <linux/apm-emulation.h>
	22
	23	static void system_power_event(unsigned int keycode)
	24	{
	25	switch (keycode) {
	26	case KEY_SUSPEND:
	27	apm_queue_event(APM_USER_SUSPEND);
da0c4901	28	pr_info("Requesting system suspend...\n");
e17bb1de RP	29	break;
	30	default:
	31	break;
	32	}
	33	}
	34
	35	static void apmpower_event(struct input_handle *handle, unsigned int type,
	36	unsigned int code, int value)
	37	{
	38	/* only react on key down events */
	39	if (value != 1)
	40	return;
	41
	42	switch (type) {
	43	case EV_PWR:
	44	system_power_event(code);
	45	break;
	46
	47	default:
	48	break;
	49	}
	50	}
	51
	52	static int apmpower_connect(struct input_handler *handler,
	53	struct input_dev *dev,
	54	const struct input_device_id *id)
	55	{
	56	struct input_handle *handle;
	57	int error;
	58
	59	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
	60	if (!handle)
	61	return -ENOMEM;
	62
	63	handle->dev = dev;
	64	handle->handler = handler;
	65	handle->name = "apm-power";
	66
e17bb1de RP	67	error = input_register_handle(handle);
e17bb1de RP	68	if (error) {
da0c4901 JP	69	pr_err("Failed to register input power handler, error %d\n",
da0c4901 JP	70	error);
e17bb1de RP	71	kfree(handle);
	72	return error;
	73	}
	74
	75	error = input_open_device(handle);
	76	if (error) {
da0c4901	77	pr_err("Failed to open input power device, error %d\n", error);
e17bb1de RP	78	input_unregister_handle(handle);
	79	kfree(handle);
	80	return error;
	81	}
	82
	83	return 0;
	84	}
	85
481419ec	86	static void apmpower_disconnect(struct input_handle *handle)
e17bb1de	87	{
e17bb1de	88	input_close_device(handle);
481419ec	89	input_unregister_handle(handle);
e17bb1de RP	90	kfree(handle);
	91	}
	92
	93	static const struct input_device_id apmpower_ids[] = {
	94	{
	95	.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
	96	.evbit = { BIT_MASK(EV_PWR) },
	97	},
	98	{ },
	99	};
	100
	101	MODULE_DEVICE_TABLE(input, apmpower_ids);
	102
	103	static struct input_handler apmpower_handler = {
	104	.event = apmpower_event,
	105	.connect = apmpower_connect,
	106	.disconnect = apmpower_disconnect,
	107	.name = "apm-power",
	108	.id_table = apmpower_ids,
	109	};
	110
	111	static int __init apmpower_init(void)
	112	{
	113	return input_register_handler(&apmpower_handler);
	114	}
	115
	116	static void __exit apmpower_exit(void)
	117	{
	118	input_unregister_handler(&apmpower_handler);
	119	}
	120
	121	module_init(apmpower_init);
	122	module_exit(apmpower_exit);
	123
	124	MODULE_AUTHOR("Richard Purdie <[email protected]>");
	125	MODULE_DESCRIPTION("Input Power Event -> APM Bridge");
	126	MODULE_LICENSE("GPL");