[net-next-2.6.git] / drivers / acpi / button.c

/*
 *  button.c - ACPI Button Driver
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/input.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define PREFIX "ACPI: "

#define ACPI_BUTTON_CLASS		"button"
#define ACPI_BUTTON_FILE_INFO		"info"
#define ACPI_BUTTON_FILE_STATE		"state"
#define ACPI_BUTTON_TYPE_UNKNOWN	0x00
#define ACPI_BUTTON_NOTIFY_STATUS	0x80

#define ACPI_BUTTON_SUBCLASS_POWER	"power"
#define ACPI_BUTTON_HID_POWER		"PNP0C0C"
#define ACPI_BUTTON_DEVICE_NAME_POWER	"Power Button"
#define ACPI_BUTTON_TYPE_POWER		0x01

#define ACPI_BUTTON_SUBCLASS_SLEEP	"sleep"
#define ACPI_BUTTON_HID_SLEEP		"PNP0C0E"
#define ACPI_BUTTON_DEVICE_NAME_SLEEP	"Sleep Button"
#define ACPI_BUTTON_TYPE_SLEEP		0x03

#define ACPI_BUTTON_SUBCLASS_LID	"lid"
#define ACPI_BUTTON_HID_LID		"PNP0C0D"
#define ACPI_BUTTON_DEVICE_NAME_LID	"Lid Switch"
#define ACPI_BUTTON_TYPE_LID		0x05

#define _COMPONENT		ACPI_BUTTON_COMPONENT
ACPI_MODULE_NAME("button");

MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI Button Driver");
MODULE_LICENSE("GPL");

static const struct acpi_device_id button_device_ids[] = {
	{ACPI_BUTTON_HID_LID,    0},
	{ACPI_BUTTON_HID_SLEEP,  0},
	{ACPI_BUTTON_HID_SLEEPF, 0},
	{ACPI_BUTTON_HID_POWER,  0},
	{ACPI_BUTTON_HID_POWERF, 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, button_device_ids);

static int acpi_button_add(struct acpi_device *device);
static int acpi_button_remove(struct acpi_device *device, int type);
static int acpi_button_resume(struct acpi_device *device);
static void acpi_button_notify(struct acpi_device *device, u32 event);
static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
static int acpi_button_state_open_fs(struct inode *inode, struct file *file);

static struct acpi_driver acpi_button_driver = {
	.name = "button",
	.class = ACPI_BUTTON_CLASS,
	.ids = button_device_ids,
	.ops = {
		.add = acpi_button_add,
		.resume = acpi_button_resume,
		.remove = acpi_button_remove,
		.notify = acpi_button_notify,
	},
};

struct acpi_button {
	unsigned int type;
	struct input_dev *input;
	char phys[32];			/* for input device */
	unsigned long pushed;
};

static const struct file_operations acpi_button_info_fops = {
	.owner = THIS_MODULE,
	.open = acpi_button_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static const struct file_operations acpi_button_state_fops = {
	.owner = THIS_MODULE,
	.open = acpi_button_state_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
static struct acpi_device *lid_device;

/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */

static struct proc_dir_entry *acpi_button_dir;

static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
{
	struct acpi_device *device = seq->private;

	seq_printf(seq, "type:                    %s\n",
		   acpi_device_name(device));
	return 0;
}

static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
}

static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
{
	struct acpi_device *device = seq->private;
	acpi_status status;
	unsigned long long state;

	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
	seq_printf(seq, "state:      %s\n",
		   ACPI_FAILURE(status) ? "unsupported" :
			(state ? "open" : "closed"));
	return 0;
}

static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
}

static struct proc_dir_entry *acpi_power_dir;
static struct proc_dir_entry *acpi_sleep_dir;
static struct proc_dir_entry *acpi_lid_dir;

static int acpi_button_add_fs(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);
	struct proc_dir_entry *entry = NULL;

	switch (button->type) {
	case ACPI_BUTTON_TYPE_POWER:
		if (!acpi_power_dir)
			acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
						    acpi_button_dir);
		entry = acpi_power_dir;
		break;
	case ACPI_BUTTON_TYPE_SLEEP:
		if (!acpi_sleep_dir)
			acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
						    acpi_button_dir);
		entry = acpi_sleep_dir;
		break;
	case ACPI_BUTTON_TYPE_LID:
		if (!acpi_lid_dir)
			acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
						  acpi_button_dir);
		entry = acpi_lid_dir;
		break;
	}

	if (!entry)
		return -ENODEV;

	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	if (!acpi_device_dir(device))
		return -ENODEV;

	/* 'info' [R] */
	entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
				 S_IRUGO, acpi_device_dir(device),
				 &acpi_button_info_fops, device);
	if (!entry)
		return -ENODEV;

	/* show lid state [R] */
	if (button->type == ACPI_BUTTON_TYPE_LID) {
		entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
					 S_IRUGO, acpi_device_dir(device),
					 &acpi_button_state_fops, device);
		if (!entry)
			return -ENODEV;
	}

	return 0;
}

static int acpi_button_remove_fs(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);

	if (acpi_device_dir(device)) {
		if (button->type == ACPI_BUTTON_TYPE_LID)
			remove_proc_entry(ACPI_BUTTON_FILE_STATE,
					  acpi_device_dir(device));
		remove_proc_entry(ACPI_BUTTON_FILE_INFO,
				  acpi_device_dir(device));

		remove_proc_entry(acpi_device_bid(device),
				  acpi_device_dir(device)->parent);
		acpi_device_dir(device) = NULL;
	}

	return 0;
}

/* --------------------------------------------------------------------------
                                Driver Interface
   -------------------------------------------------------------------------- */
int acpi_lid_notifier_register(struct notifier_block *nb)
{
	return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
}
EXPORT_SYMBOL(acpi_lid_notifier_register);

int acpi_lid_notifier_unregister(struct notifier_block *nb)
{
	return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
}
EXPORT_SYMBOL(acpi_lid_notifier_unregister);

int acpi_lid_open(void)
{
	acpi_status status;
	unsigned long long state;

	if (!lid_device)
		return -ENODEV;

	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
				       &state);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	return !!state;
}
EXPORT_SYMBOL(acpi_lid_open);

static int acpi_lid_send_state(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);
	unsigned long long state;
	acpi_status status;
	int ret;

	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	/* input layer checks if event is redundant */
	input_report_switch(button->input, SW_LID, !state);
	input_sync(button->input);

	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
	if (ret == NOTIFY_DONE)
		ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
						   device);
	if (ret == NOTIFY_DONE || ret == NOTIFY_OK) {
		/*
		 * It is also regarded as success if the notifier_chain
		 * returns NOTIFY_OK or NOTIFY_DONE.
		 */
		ret = 0;
	}
	return ret;
}

static void acpi_button_notify(struct acpi_device *device, u32 event)
{
	struct acpi_button *button = acpi_driver_data(device);
	struct input_dev *input;

	switch (event) {
	case ACPI_FIXED_HARDWARE_EVENT:
		event = ACPI_BUTTON_NOTIFY_STATUS;
		/* fall through */
	case ACPI_BUTTON_NOTIFY_STATUS:
		input = button->input;
		if (button->type == ACPI_BUTTON_TYPE_LID) {
			acpi_lid_send_state(device);
		} else {
			int keycode = test_bit(KEY_SLEEP, input->keybit) ?
						KEY_SLEEP : KEY_POWER;

			input_report_key(input, keycode, 1);
			input_sync(input);
			input_report_key(input, keycode, 0);
			input_sync(input);
		}

		acpi_bus_generate_proc_event(device, event, ++button->pushed);
		break;
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
		break;
	}
}

static int acpi_button_resume(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);

	if (button->type == ACPI_BUTTON_TYPE_LID)
		return acpi_lid_send_state(device);
	return 0;
}

static int acpi_button_add(struct acpi_device *device)
{
	struct acpi_button *button;
	struct input_dev *input;
	char *hid, *name, *class;
	int error;

	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
	if (!button)
		return -ENOMEM;

	device->driver_data = button;

	button->input = input = input_allocate_device();
	if (!input) {
		error = -ENOMEM;
		goto err_free_button;
	}

	hid = acpi_device_hid(device);
	name = acpi_device_name(device);
	class = acpi_device_class(device);

	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) ||
	    !strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
		button->type = ACPI_BUTTON_TYPE_POWER;
		strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
		sprintf(class, "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) ||
		   !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
		button->type = ACPI_BUTTON_TYPE_SLEEP;
		strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
		sprintf(class, "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
		button->type = ACPI_BUTTON_TYPE_LID;
		strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
		sprintf(class, "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
	} else {
		printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
		error = -ENODEV;
		goto err_free_input;
	}

	error = acpi_button_add_fs(device);
	if (error)
		goto err_free_input;

	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);

	input->name = name;
	input->phys = button->phys;
	input->id.bustype = BUS_HOST;
	input->id.product = button->type;
	input->dev.parent = &device->dev;

	switch (button->type) {
	case ACPI_BUTTON_TYPE_POWER:
		input->evbit[0] = BIT_MASK(EV_KEY);
		set_bit(KEY_POWER, input->keybit);
		break;

	case ACPI_BUTTON_TYPE_SLEEP:
		input->evbit[0] = BIT_MASK(EV_KEY);
		set_bit(KEY_SLEEP, input->keybit);
		break;

	case ACPI_BUTTON_TYPE_LID:
		input->evbit[0] = BIT_MASK(EV_SW);
		set_bit(SW_LID, input->swbit);
		break;
	}

	error = input_register_device(input);
	if (error)
		goto err_remove_fs;
	if (button->type == ACPI_BUTTON_TYPE_LID) {
		acpi_lid_send_state(device);
		/*
		 * This assumes there's only one lid device, or if there are
		 * more we only care about the last one...
		 */
		lid_device = device;
	}

	if (device->wakeup.flags.valid) {
		/* Button's GPE is run-wake GPE */
		acpi_enable_gpe(device->wakeup.gpe_device,
				device->wakeup.gpe_number,
				ACPI_GPE_TYPE_WAKE_RUN);
		device->wakeup.state.enabled = 1;
	}

	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
	return 0;

 err_remove_fs:
	acpi_button_remove_fs(device);
 err_free_input:
	input_free_device(input);
 err_free_button:
	kfree(button);
	return error;
}

static int acpi_button_remove(struct acpi_device *device, int type)
{
	struct acpi_button *button = acpi_driver_data(device);

	if (device->wakeup.flags.valid) {
		acpi_disable_gpe(device->wakeup.gpe_device,
				device->wakeup.gpe_number,
				ACPI_GPE_TYPE_WAKE_RUN);
		device->wakeup.state.enabled = 0;
	}

	acpi_button_remove_fs(device);
	input_unregister_device(button->input);
	kfree(button);
	return 0;
}

static int __init acpi_button_init(void)
{
	int result;

	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	if (!acpi_button_dir)
		return -ENODEV;

	result = acpi_bus_register_driver(&acpi_button_driver);
	if (result < 0) {
		remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
		return -ENODEV;
	}

	return 0;
}

static void __exit acpi_button_exit(void)
{
	acpi_bus_unregister_driver(&acpi_button_driver);

	if (acpi_power_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	if (acpi_sleep_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	if (acpi_lid_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
}

module_init(acpi_button_init);
module_exit(acpi_button_exit);
Commit	Line	Data
1da177e4	1	/*
50a4da89	2	* button.c - ACPI Button Driver
1da177e4 LT	3	*
	4	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	6	*
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or (at
	12	* your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	22	*
	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/init.h>
b34a8030 AS	29	#include <linux/types.h>
	30	#include <linux/proc_fs.h>
	31	#include <linux/seq_file.h>
c0968f0e	32	#include <linux/input.h>
1da177e4 LT	33	#include <acpi/acpi_bus.h>
	34	#include <acpi/acpi_drivers.h>
	35
a192a958 LB	36	#define PREFIX "ACPI: "
a192a958 LB	37
1da177e4	38	#define ACPI_BUTTON_CLASS "button"
b34a8030 AS	39	#define ACPI_BUTTON_FILE_INFO "info"
	40	#define ACPI_BUTTON_FILE_STATE "state"
	41	#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
1da177e4 LT	42	#define ACPI_BUTTON_NOTIFY_STATUS 0x80
	43
	44	#define ACPI_BUTTON_SUBCLASS_POWER "power"
4be44fcd	45	#define ACPI_BUTTON_HID_POWER "PNP0C0C"
d68b597c	46	#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
1da177e4	47	#define ACPI_BUTTON_TYPE_POWER 0x01
1da177e4 LT	48
	49	#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
	50	#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
d68b597c	51	#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
1da177e4	52	#define ACPI_BUTTON_TYPE_SLEEP 0x03
1da177e4 LT	53
	54	#define ACPI_BUTTON_SUBCLASS_LID "lid"
	55	#define ACPI_BUTTON_HID_LID "PNP0C0D"
	56	#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
	57	#define ACPI_BUTTON_TYPE_LID 0x05
	58
	59	#define _COMPONENT ACPI_BUTTON_COMPONENT
f52fd66d	60	ACPI_MODULE_NAME("button");
1da177e4	61
c0968f0e	62	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	63	MODULE_DESCRIPTION("ACPI Button Driver");
1da177e4 LT	64	MODULE_LICENSE("GPL");
1da177e4 LT	65
1ba90e3a TR	66	static const struct acpi_device_id button_device_ids[] = {
	67	{ACPI_BUTTON_HID_LID, 0},
	68	{ACPI_BUTTON_HID_SLEEP, 0},
	69	{ACPI_BUTTON_HID_SLEEPF, 0},
	70	{ACPI_BUTTON_HID_POWER, 0},
	71	{ACPI_BUTTON_HID_POWERF, 0},
	72	{"", 0},
	73	};
	74	MODULE_DEVICE_TABLE(acpi, button_device_ids);
	75
4be44fcd LB	76	static int acpi_button_add(struct acpi_device *device);
4be44fcd LB	77	static int acpi_button_remove(struct acpi_device *device, int type);
23de5d9e	78	static int acpi_button_resume(struct acpi_device *device);
373cfc36	79	static void acpi_button_notify(struct acpi_device *device, u32 event);
b34a8030 AS	80	static int acpi_button_info_open_fs(struct inode inode, struct file file);
b34a8030 AS	81	static int acpi_button_state_open_fs(struct inode inode, struct file file);
1da177e4 LT	82
1da177e4 LT	83	static struct acpi_driver acpi_button_driver = {
c2b6705b	84	.name = "button",
4be44fcd	85	.class = ACPI_BUTTON_CLASS,
1ba90e3a	86	.ids = button_device_ids,
4be44fcd LB	87	.ops = {
4be44fcd LB	88	.add = acpi_button_add,
23de5d9e	89	.resume = acpi_button_resume,
4be44fcd	90	.remove = acpi_button_remove,
373cfc36	91	.notify = acpi_button_notify,
c0968f0e	92	},
1da177e4 LT	93	};
	94
	95	struct acpi_button {
c0968f0e DT	96	unsigned int type;
	97	struct input_dev *input;
	98	char phys[32]; /* for input device */
4be44fcd	99	unsigned long pushed;
1da177e4 LT	100	};
1da177e4 LT	101
d7508032	102	static const struct file_operations acpi_button_info_fops = {
cf7acfab	103	.owner = THIS_MODULE,
4be44fcd LB	104	.open = acpi_button_info_open_fs,
	105	.read = seq_read,
	106	.llseek = seq_lseek,
	107	.release = single_release,
b34a8030 AS	108	};
b34a8030 AS	109
d7508032	110	static const struct file_operations acpi_button_state_fops = {
cf7acfab	111	.owner = THIS_MODULE,
4be44fcd LB	112	.open = acpi_button_state_open_fs,
	113	.read = seq_read,
	114	.llseek = seq_lseek,
	115	.release = single_release,
b34a8030	116	};
4be44fcd	117
7e12715e JB	118	static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
	119	static struct acpi_device *lid_device;
	120
b34a8030 AS	121	/* --------------------------------------------------------------------------
	122	FS Interface (/proc)
	123	-------------------------------------------------------------------------- */
	124
4be44fcd	125	static struct proc_dir_entry *acpi_button_dir;
b34a8030 AS	126
	127	static int acpi_button_info_seq_show(struct seq_file seq, void offset)
	128	{
106c19e7	129	struct acpi_device *device = seq->private;
b34a8030	130
4be44fcd	131	seq_printf(seq, "type: %s\n",
106c19e7	132	acpi_device_name(device));
d550d98d	133	return 0;
b34a8030 AS	134	}
	135
	136	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	137	{
	138	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	139	}
4be44fcd	140
b34a8030 AS	141	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	142	{
106c19e7	143	struct acpi_device *device = seq->private;
4be44fcd	144	acpi_status status;
27663c58	145	unsigned long long state;
b34a8030	146
106c19e7	147	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
c0968f0e DT	148	seq_printf(seq, "state: %s\n",
	149	ACPI_FAILURE(status) ? "unsupported" :
	150	(state ? "open" : "closed"));
d550d98d	151	return 0;
b34a8030 AS	152	}
	153
	154	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	155	{
	156	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	157	}
	158
	159	static struct proc_dir_entry *acpi_power_dir;
	160	static struct proc_dir_entry *acpi_sleep_dir;
	161	static struct proc_dir_entry *acpi_lid_dir;
	162
4be44fcd	163	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	164	{
1bce8113	165	struct acpi_button *button = acpi_driver_data(device);
4be44fcd	166	struct proc_dir_entry *entry = NULL;
b34a8030 AS	167
	168	switch (button->type) {
	169	case ACPI_BUTTON_TYPE_POWER:
b34a8030	170	if (!acpi_power_dir)
4be44fcd LB	171	acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
4be44fcd LB	172	acpi_button_dir);
b34a8030 AS	173	entry = acpi_power_dir;
	174	break;
	175	case ACPI_BUTTON_TYPE_SLEEP:
b34a8030	176	if (!acpi_sleep_dir)
4be44fcd LB	177	acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
4be44fcd LB	178	acpi_button_dir);
b34a8030 AS	179	entry = acpi_sleep_dir;
	180	break;
	181	case ACPI_BUTTON_TYPE_LID:
	182	if (!acpi_lid_dir)
4be44fcd LB	183	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
4be44fcd LB	184	acpi_button_dir);
b34a8030 AS	185	entry = acpi_lid_dir;
	186	break;
	187	}
	188
	189	if (!entry)
d550d98d	190	return -ENODEV;
b34a8030 AS	191
	192	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	193	if (!acpi_device_dir(device))
d550d98d	194	return -ENODEV;
b34a8030 AS	195
b34a8030 AS	196	/* 'info' [R] */
cf7acfab DL	197	entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
cf7acfab DL	198	S_IRUGO, acpi_device_dir(device),
106c19e7	199	&acpi_button_info_fops, device);
b34a8030	200	if (!entry)
d550d98d	201	return -ENODEV;
b34a8030 AS	202
	203	/* show lid state [R] */
	204	if (button->type == ACPI_BUTTON_TYPE_LID) {
cf7acfab DL	205	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
cf7acfab DL	206	S_IRUGO, acpi_device_dir(device),
106c19e7	207	&acpi_button_state_fops, device);
b34a8030	208	if (!entry)
a6fc6720	209	return -ENODEV;
b34a8030 AS	210	}
b34a8030 AS	211
d550d98d	212	return 0;
b34a8030 AS	213	}
b34a8030 AS	214
4be44fcd	215	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	216	{
c0968f0e	217	struct acpi_button *button = acpi_driver_data(device);
b34a8030	218
b34a8030 AS	219	if (acpi_device_dir(device)) {
	220	if (button->type == ACPI_BUTTON_TYPE_LID)
	221	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	222	acpi_device_dir(device));
b34a8030	223	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	224	acpi_device_dir(device));
b34a8030 AS	225
b34a8030 AS	226	remove_proc_entry(acpi_device_bid(device),
4be44fcd	227	acpi_device_dir(device)->parent);
b34a8030 AS	228	acpi_device_dir(device) = NULL;
	229	}
	230
d550d98d	231	return 0;
b34a8030 AS	232	}
b34a8030 AS	233
1da177e4 LT	234	/* --------------------------------------------------------------------------
	235	Driver Interface
	236	-------------------------------------------------------------------------- */
7e12715e JB	237	int acpi_lid_notifier_register(struct notifier_block *nb)
	238	{
	239	return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
	240	}
	241	EXPORT_SYMBOL(acpi_lid_notifier_register);
	242
	243	int acpi_lid_notifier_unregister(struct notifier_block *nb)
	244	{
	245	return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
	246	}
	247	EXPORT_SYMBOL(acpi_lid_notifier_unregister);
	248
	249	int acpi_lid_open(void)
	250	{
	251	acpi_status status;
	252	unsigned long long state;
	253
2c907b72 JB	254	if (!lid_device)
	255	return -ENODEV;
	256
7e12715e JB	257	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
	258	&state);
	259	if (ACPI_FAILURE(status))
	260	return -ENODEV;
	261
	262	return !!state;
	263	}
	264	EXPORT_SYMBOL(acpi_lid_open);
	265
106c19e7	266	static int acpi_lid_send_state(struct acpi_device *device)
23de5d9e	267	{
106c19e7	268	struct acpi_button *button = acpi_driver_data(device);
27663c58	269	unsigned long long state;
23de5d9e	270	acpi_status status;
7e12715e	271	int ret;
23de5d9e	272
106c19e7	273	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
23de5d9e AS	274	if (ACPI_FAILURE(status))
23de5d9e AS	275	return -ENODEV;
50a4da89	276
23de5d9e AS	277	/* input layer checks if event is redundant */
23de5d9e AS	278	input_report_switch(button->input, SW_LID, !state);
df316e93	279	input_sync(button->input);
7e12715e JB	280
	281	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
	282	if (ret == NOTIFY_DONE)
	283	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
	284	device);
13c199c0 ZY	285	if (ret == NOTIFY_DONE \|\| ret == NOTIFY_OK) {
	286	/*
	287	* It is also regarded as success if the notifier_chain
	288	* returns NOTIFY_OK or NOTIFY_DONE.
	289	*/
	290	ret = 0;
	291	}
7e12715e	292	return ret;
23de5d9e	293	}
1da177e4	294
373cfc36	295	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	296	{
373cfc36	297	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	298	struct input_dev *input;
1da177e4	299
1da177e4	300	switch (event) {
373cfc36 BH	301	case ACPI_FIXED_HARDWARE_EVENT:
	302	event = ACPI_BUTTON_NOTIFY_STATUS;
	303	/* fall through */
1da177e4	304	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	305	input = button->input;
c0968f0e	306	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	307	acpi_lid_send_state(device);
c0968f0e DT	308	} else {
	309	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	310	KEY_SLEEP : KEY_POWER;
	311
	312	input_report_key(input, keycode, 1);
	313	input_sync(input);
	314	input_report_key(input, keycode, 0);
df316e93	315	input_sync(input);
c0968f0e	316	}
c0968f0e	317
106c19e7	318	acpi_bus_generate_proc_event(device, event, ++button->pushed);
1da177e4 LT	319	break;
	320	default:
	321	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	322	"Unsupported event [0x%x]\n", event));
1da177e4 LT	323	break;
1da177e4 LT	324	}
1da177e4 LT	325	}
1da177e4 LT	326
23de5d9e AS	327	static int acpi_button_resume(struct acpi_device *device)
23de5d9e AS	328	{
1bce8113	329	struct acpi_button *button = acpi_driver_data(device);
50a4da89	330
e2fb9754	331	if (button->type == ACPI_BUTTON_TYPE_LID)
106c19e7	332	return acpi_lid_send_state(device);
23de5d9e AS	333	return 0;
	334	}
	335
c0968f0e DT	336	static int acpi_button_add(struct acpi_device *device)
c0968f0e DT	337	{
c0968f0e DT	338	struct acpi_button *button;
c0968f0e DT	339	struct input_dev *input;
bf04a772	340	char hid, name, *class;
1bce8113	341	int error;
1da177e4	342
c0968f0e	343	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	344	if (!button)
d550d98d	345	return -ENOMEM;
1da177e4	346
db89b4f0	347	device->driver_data = button;
1da177e4	348
c0968f0e DT	349	button->input = input = input_allocate_device();
	350	if (!input) {
	351	error = -ENOMEM;
	352	goto err_free_button;
	353	}
	354
bf04a772 BH	355	hid = acpi_device_hid(device);
	356	name = acpi_device_name(device);
	357	class = acpi_device_class(device);
	358
d68b597c BH	359	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) \|\|
d68b597c BH	360	!strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
1da177e4	361	button->type = ACPI_BUTTON_TYPE_POWER;
bf04a772 BH	362	strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
bf04a772 BH	363	sprintf(class, "%s/%s",
1da177e4	364	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
d68b597c BH	365	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) \|\|
d68b597c BH	366	!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
1da177e4	367	button->type = ACPI_BUTTON_TYPE_SLEEP;
bf04a772 BH	368	strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
bf04a772 BH	369	sprintf(class, "%s/%s",
1da177e4	370	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
bf04a772	371	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
1da177e4	372	button->type = ACPI_BUTTON_TYPE_LID;
bf04a772 BH	373	strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
bf04a772 BH	374	sprintf(class, "%s/%s",
1da177e4	375	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	376	} else {
bf04a772	377	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
c0968f0e DT	378	error = -ENODEV;
c0968f0e DT	379	goto err_free_input;
1da177e4 LT	380	}
1da177e4 LT	381
c0968f0e DT	382	error = acpi_button_add_fs(device);
	383	if (error)
	384	goto err_free_input;
	385
bf04a772	386	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
c0968f0e	387
bf04a772	388	input->name = name;
c0968f0e DT	389	input->phys = button->phys;
	390	input->id.bustype = BUS_HOST;
	391	input->id.product = button->type;
3b34e523	392	input->dev.parent = &device->dev;
b34a8030	393
1da177e4	394	switch (button->type) {
c0968f0e	395	case ACPI_BUTTON_TYPE_POWER:
7b19ada2	396	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	397	set_bit(KEY_POWER, input->keybit);
1da177e4	398	break;
c0968f0e DT	399
c0968f0e DT	400	case ACPI_BUTTON_TYPE_SLEEP:
7b19ada2	401	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	402	set_bit(KEY_SLEEP, input->keybit);
1da177e4	403	break;
c0968f0e DT	404
c0968f0e DT	405	case ACPI_BUTTON_TYPE_LID:
7b19ada2	406	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	407	set_bit(SW_LID, input->swbit);
1da177e4 LT	408	break;
	409	}
	410
c0968f0e DT	411	error = input_register_device(input);
c0968f0e DT	412	if (error)
373cfc36	413	goto err_remove_fs;
7e12715e	414	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	415	acpi_lid_send_state(device);
7e12715e JB	416	/*
	417	* This assumes there's only one lid device, or if there are
	418	* more we only care about the last one...
	419	*/
	420	lid_device = device;
	421	}
1da177e4 LT	422
	423	if (device->wakeup.flags.valid) {
	424	/* Button's GPE is run-wake GPE */
4be44fcd	425	acpi_enable_gpe(device->wakeup.gpe_device,
9630bdd9 RW	426	device->wakeup.gpe_number,
9630bdd9 RW	427	ACPI_GPE_TYPE_WAKE_RUN);
1da177e4 LT	428	device->wakeup.state.enabled = 1;
	429	}
	430
bf04a772	431	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
c0968f0e	432	return 0;
1da177e4	433
c0968f0e DT	434	err_remove_fs:
	435	acpi_button_remove_fs(device);
	436	err_free_input:
	437	input_free_device(input);
	438	err_free_button:
	439	kfree(button);
	440	return error;
1da177e4 LT	441	}
1da177e4 LT	442
4be44fcd	443	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	444	{
1bce8113	445	struct acpi_button *button = acpi_driver_data(device);
1da177e4	446
9630bdd9 RW	447	if (device->wakeup.flags.valid) {
	448	acpi_disable_gpe(device->wakeup.gpe_device,
	449	device->wakeup.gpe_number,
	450	ACPI_GPE_TYPE_WAKE_RUN);
	451	device->wakeup.state.enabled = 0;
	452	}
	453
4be44fcd	454	acpi_button_remove_fs(device);
c0968f0e	455	input_unregister_device(button->input);
1da177e4	456	kfree(button);
d550d98d	457	return 0;
1da177e4 LT	458	}
1da177e4 LT	459
4be44fcd	460	static int __init acpi_button_init(void)
1da177e4	461	{
c0968f0e	462	int result;
1da177e4	463
b34a8030 AS	464	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030 AS	465	if (!acpi_button_dir)
d550d98d	466	return -ENODEV;
50a4da89	467
1da177e4 LT	468	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	469	if (result < 0) {
b34a8030	470	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
d550d98d	471	return -ENODEV;
1da177e4 LT	472	}
1da177e4 LT	473
d550d98d	474	return 0;
1da177e4 LT	475	}
1da177e4 LT	476
4be44fcd	477	static void __exit acpi_button_exit(void)
1da177e4	478	{
1da177e4 LT	479	acpi_bus_unregister_driver(&acpi_button_driver);
1da177e4 LT	480
4be44fcd	481	if (acpi_power_dir)
b34a8030 AS	482	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	483	if (acpi_sleep_dir)
	484	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	485	if (acpi_lid_dir)
	486	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	487	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
1da177e4 LT	488	}
1da177e4 LT	489
1da177e4 LT	490	module_init(acpi_button_init);
1da177e4 LT	491	module_exit(acpi_button_exit);