[deliverable/linux.git] / drivers / input / power.c

/*
 * $Id: power.c,v 1.10 2001/09/25 09:17:15 vojtech Exp $
 *
 *  Copyright (c) 2001 "Crazy" James Simmons
 *
 *  Input driver Power Management.
 *
 *  Sponsored by Transvirtual Technology.
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so by
 * e-mail - mail your message to <jsimmons@transvirtual.com>.
 */

#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>

static struct input_handler power_handler;

/*
 * Power management can't be done in a interrupt context. So we have to
 * use keventd.
 */
static int suspend_button_pushed;
static void suspend_button_task_handler(struct work_struct *work)
{
        udelay(200); /* debounce */
        suspend_button_pushed = 0;
}

static DECLARE_WORK(suspend_button_task, suspend_button_task_handler);

static void power_event(struct input_handle *handle, unsigned int type,
		        unsigned int code, int down)
{
	struct input_dev *dev = handle->dev;

	printk("Entering power_event\n");

	if (type == EV_PWR) {
		switch (code) {
			case KEY_SUSPEND:
				printk("Powering down entire device\n");

				if (!suspend_button_pushed) {
					suspend_button_pushed = 1;
					schedule_work(&suspend_button_task);
				}
				break;
			case KEY_POWER:
				/* Hum power down the machine. */
				break;
			default:
				return;
		}
	}

	if (type == EV_KEY) {
		switch (code) {
			case KEY_SUSPEND:
				printk("Powering down input device\n");
				/* This is risky. See pm.h for details. */
				if (dev->state != PM_RESUME)
					dev->state = PM_RESUME;
				else
					dev->state = PM_SUSPEND;
				 /* pm_send(dev->pm_dev, dev->state, dev); */
				break;
			case KEY_POWER:
				/* Turn the input device off completely ? */
				break;
			default:
				return;
		}
	}
	return;
}

static int power_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 = "power";

	error = input_register_handle(handle);
	if (error)
		goto err_free_handle;

	error = input_open_device(handle);
	if (error)
		goto err_unregister_handle;

	return 0;

 err_unregister_handle:
	input_unregister_handle(handle);
 err_free_handle:
	kfree(handle);
	return error;
}

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

static const struct input_device_id power_ids[] = {
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
		.evbit = { BIT(EV_KEY) },
		.keybit = { [LONG(KEY_SUSPEND)] = BIT(KEY_SUSPEND) }
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
		.evbit = { BIT(EV_KEY) },
		.keybit = { [LONG(KEY_POWER)] = BIT(KEY_POWER) }
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
		.evbit = { BIT(EV_PWR) },
	},
	{ },	/* Terminating entry */
};

MODULE_DEVICE_TABLE(input, power_ids);

static struct input_handler power_handler = {
	.event =	power_event,
	.connect =	power_connect,
	.disconnect =	power_disconnect,
	.name =		"power",
	.id_table =	power_ids,
};

static int __init power_init(void)
{
	return input_register_handler(&power_handler);
}

static void __exit power_exit(void)
{
	input_unregister_handler(&power_handler);
}

module_init(power_init);
module_exit(power_exit);

MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>");
MODULE_DESCRIPTION("Input Power Management driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* $Id: power.c,v 1.10 2001/09/25 09:17:15 vojtech Exp $
	3	*
	4	* Copyright (c) 2001 "Crazy" James Simmons
	5	*
	6	* Input driver Power Management.
	7	*
	8	* Sponsored by Transvirtual Technology.
	9	*/
	10
	11	/*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	* Should you need to contact me, the author, you can do so by
	27	* e-mail - mail your message to <jsimmons@transvirtual.com>.
	28	*/
	29
	30	#include <linux/module.h>
1da177e4 LT	31	#include <linux/input.h>
	32	#include <linux/slab.h>
	33	#include <linux/init.h>
	34	#include <linux/tty.h>
	35	#include <linux/delay.h>
	36	#include <linux/pm.h>
	37
	38	static struct input_handler power_handler;
	39
	40	/*
	41	* Power management can't be done in a interrupt context. So we have to
	42	* use keventd.
	43	*/
5b2a0826 DT	44	static int suspend_button_pushed;
5b2a0826 DT	45	static void suspend_button_task_handler(struct work_struct *work)
1da177e4 LT	46	{
	47	udelay(200); /* debounce */
	48	suspend_button_pushed = 0;
	49	}
	50
5b2a0826	51	static DECLARE_WORK(suspend_button_task, suspend_button_task_handler);
1da177e4 LT	52
	53	static void power_event(struct input_handle *handle, unsigned int type,
	54	unsigned int code, int down)
	55	{
	56	struct input_dev *dev = handle->dev;
	57
	58	printk("Entering power_event\n");
	59
	60	if (type == EV_PWR) {
	61	switch (code) {
	62	case KEY_SUSPEND:
	63	printk("Powering down entire device\n");
	64
	65	if (!suspend_button_pushed) {
5b2a0826 DT	66	suspend_button_pushed = 1;
	67	schedule_work(&suspend_button_task);
	68	}
1da177e4 LT	69	break;
	70	case KEY_POWER:
	71	/* Hum power down the machine. */
	72	break;
	73	default:
	74	return;
	75	}
	76	}
	77
	78	if (type == EV_KEY) {
	79	switch (code) {
	80	case KEY_SUSPEND:
	81	printk("Powering down input device\n");
	82	/* This is risky. See pm.h for details. */
	83	if (dev->state != PM_RESUME)
	84	dev->state = PM_RESUME;
	85	else
	86	dev->state = PM_SUSPEND;
5b2a0826	87	/* pm_send(dev->pm_dev, dev->state, dev); */
1da177e4 LT	88	break;
	89	case KEY_POWER:
	90	/* Turn the input device off completely ? */
	91	break;
	92	default:
	93	return;
	94	}
	95	}
	96	return;
	97	}
	98
5b2a0826 DT	99	static int power_connect(struct input_handler handler, struct input_dev dev,
5b2a0826 DT	100	const struct input_device_id *id)
1da177e4 LT	101	{
1da177e4 LT	102	struct input_handle *handle;
5b2a0826	103	int error;
1da177e4	104
5b2a0826 DT	105	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
	106	if (!handle)
	107	return -ENOMEM;
1da177e4 LT	108
	109	handle->dev = dev;
	110	handle->handler = handler;
5b2a0826	111	handle->name = "power";
1da177e4	112
5b2a0826 DT	113	error = input_register_handle(handle);
	114	if (error)
	115	goto err_free_handle;
1da177e4	116
5b2a0826 DT	117	error = input_open_device(handle);
	118	if (error)
	119	goto err_unregister_handle;
	120
	121	return 0;
	122
	123	err_unregister_handle:
	124	input_unregister_handle(handle);
	125	err_free_handle:
	126	kfree(handle);
	127	return error;
1da177e4 LT	128	}
	129
	130	static void power_disconnect(struct input_handle *handle)
	131	{
	132	input_close_device(handle);
5b2a0826	133	input_unregister_handle(handle);
1da177e4 LT	134	kfree(handle);
	135	}
	136
66e66118	137	static const struct input_device_id power_ids[] = {
1da177e4 LT	138	{
	139	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_KEYBIT,
	140	.evbit = { BIT(EV_KEY) },
	141	.keybit = { [LONG(KEY_SUSPEND)] = BIT(KEY_SUSPEND) }
	142	},
	143	{
	144	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_KEYBIT,
	145	.evbit = { BIT(EV_KEY) },
	146	.keybit = { [LONG(KEY_POWER)] = BIT(KEY_POWER) }
	147	},
	148	{
	149	.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
	150	.evbit = { BIT(EV_PWR) },
	151	},
5b2a0826	152	{ }, /* Terminating entry */
1da177e4 LT	153	};
	154
	155	MODULE_DEVICE_TABLE(input, power_ids);
	156
	157	static struct input_handler power_handler = {
	158	.event = power_event,
	159	.connect = power_connect,
	160	.disconnect = power_disconnect,
	161	.name = "power",
	162	.id_table = power_ids,
	163	};
	164
	165	static int __init power_init(void)
	166	{
4263cf0f	167	return input_register_handler(&power_handler);
1da177e4 LT	168	}
	169
	170	static void __exit power_exit(void)
	171	{
	172	input_unregister_handler(&power_handler);
	173	}
	174
	175	module_init(power_init);
	176	module_exit(power_exit);
	177
	178	MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>");
	179	MODULE_DESCRIPTION("Input Power Management driver");
	180	MODULE_LICENSE("GPL");