[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 <linux/slab.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;
	const char *hid = acpi_device_hid(device);
	char *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;
	}

	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);
		device->wakeup.run_wake_count++;
		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);
		device->wakeup.run_wake_count--;
		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>
5a0e3ad6	33	#include <linux/slab.h>
1da177e4 LT	34	#include <acpi/acpi_bus.h>
	35	#include <acpi/acpi_drivers.h>
	36
a192a958 LB	37	#define PREFIX "ACPI: "
a192a958 LB	38
1da177e4	39	#define ACPI_BUTTON_CLASS "button"
b34a8030 AS	40	#define ACPI_BUTTON_FILE_INFO "info"
	41	#define ACPI_BUTTON_FILE_STATE "state"
	42	#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
1da177e4 LT	43	#define ACPI_BUTTON_NOTIFY_STATUS 0x80
	44
	45	#define ACPI_BUTTON_SUBCLASS_POWER "power"
4be44fcd	46	#define ACPI_BUTTON_HID_POWER "PNP0C0C"
d68b597c	47	#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
1da177e4	48	#define ACPI_BUTTON_TYPE_POWER 0x01
1da177e4 LT	49
	50	#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
	51	#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
d68b597c	52	#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
1da177e4	53	#define ACPI_BUTTON_TYPE_SLEEP 0x03
1da177e4 LT	54
	55	#define ACPI_BUTTON_SUBCLASS_LID "lid"
	56	#define ACPI_BUTTON_HID_LID "PNP0C0D"
	57	#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
	58	#define ACPI_BUTTON_TYPE_LID 0x05
	59
	60	#define _COMPONENT ACPI_BUTTON_COMPONENT
f52fd66d	61	ACPI_MODULE_NAME("button");
1da177e4	62
c0968f0e	63	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	64	MODULE_DESCRIPTION("ACPI Button Driver");
1da177e4 LT	65	MODULE_LICENSE("GPL");
1da177e4 LT	66
1ba90e3a TR	67	static const struct acpi_device_id button_device_ids[] = {
	68	{ACPI_BUTTON_HID_LID, 0},
	69	{ACPI_BUTTON_HID_SLEEP, 0},
	70	{ACPI_BUTTON_HID_SLEEPF, 0},
	71	{ACPI_BUTTON_HID_POWER, 0},
	72	{ACPI_BUTTON_HID_POWERF, 0},
	73	{"", 0},
	74	};
	75	MODULE_DEVICE_TABLE(acpi, button_device_ids);
	76
4be44fcd LB	77	static int acpi_button_add(struct acpi_device *device);
4be44fcd LB	78	static int acpi_button_remove(struct acpi_device *device, int type);
23de5d9e	79	static int acpi_button_resume(struct acpi_device *device);
373cfc36	80	static void acpi_button_notify(struct acpi_device *device, u32 event);
b34a8030 AS	81	static int acpi_button_info_open_fs(struct inode inode, struct file file);
b34a8030 AS	82	static int acpi_button_state_open_fs(struct inode inode, struct file file);
1da177e4 LT	83
1da177e4 LT	84	static struct acpi_driver acpi_button_driver = {
c2b6705b	85	.name = "button",
4be44fcd	86	.class = ACPI_BUTTON_CLASS,
1ba90e3a	87	.ids = button_device_ids,
4be44fcd LB	88	.ops = {
4be44fcd LB	89	.add = acpi_button_add,
23de5d9e	90	.resume = acpi_button_resume,
4be44fcd	91	.remove = acpi_button_remove,
373cfc36	92	.notify = acpi_button_notify,
c0968f0e	93	},
1da177e4 LT	94	};
	95
	96	struct acpi_button {
c0968f0e DT	97	unsigned int type;
	98	struct input_dev *input;
	99	char phys[32]; /* for input device */
4be44fcd	100	unsigned long pushed;
1da177e4 LT	101	};
1da177e4 LT	102
d7508032	103	static const struct file_operations acpi_button_info_fops = {
cf7acfab	104	.owner = THIS_MODULE,
4be44fcd LB	105	.open = acpi_button_info_open_fs,
	106	.read = seq_read,
	107	.llseek = seq_lseek,
	108	.release = single_release,
b34a8030 AS	109	};
b34a8030 AS	110
d7508032	111	static const struct file_operations acpi_button_state_fops = {
cf7acfab	112	.owner = THIS_MODULE,
4be44fcd LB	113	.open = acpi_button_state_open_fs,
	114	.read = seq_read,
	115	.llseek = seq_lseek,
	116	.release = single_release,
b34a8030	117	};
4be44fcd	118
7e12715e JB	119	static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
	120	static struct acpi_device *lid_device;
	121
b34a8030 AS	122	/* --------------------------------------------------------------------------
	123	FS Interface (/proc)
	124	-------------------------------------------------------------------------- */
	125
4be44fcd	126	static struct proc_dir_entry *acpi_button_dir;
b34a8030 AS	127
	128	static int acpi_button_info_seq_show(struct seq_file seq, void offset)
	129	{
106c19e7	130	struct acpi_device *device = seq->private;
b34a8030	131
4be44fcd	132	seq_printf(seq, "type: %s\n",
106c19e7	133	acpi_device_name(device));
d550d98d	134	return 0;
b34a8030 AS	135	}
	136
	137	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	138	{
	139	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	140	}
4be44fcd	141
b34a8030 AS	142	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	143	{
106c19e7	144	struct acpi_device *device = seq->private;
4be44fcd	145	acpi_status status;
27663c58	146	unsigned long long state;
b34a8030	147
106c19e7	148	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
c0968f0e DT	149	seq_printf(seq, "state: %s\n",
	150	ACPI_FAILURE(status) ? "unsupported" :
	151	(state ? "open" : "closed"));
d550d98d	152	return 0;
b34a8030 AS	153	}
	154
	155	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	156	{
	157	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	158	}
	159
	160	static struct proc_dir_entry *acpi_power_dir;
	161	static struct proc_dir_entry *acpi_sleep_dir;
	162	static struct proc_dir_entry *acpi_lid_dir;
	163
4be44fcd	164	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	165	{
1bce8113	166	struct acpi_button *button = acpi_driver_data(device);
4be44fcd	167	struct proc_dir_entry *entry = NULL;
b34a8030 AS	168
	169	switch (button->type) {
	170	case ACPI_BUTTON_TYPE_POWER:
b34a8030	171	if (!acpi_power_dir)
4be44fcd LB	172	acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
4be44fcd LB	173	acpi_button_dir);
b34a8030 AS	174	entry = acpi_power_dir;
	175	break;
	176	case ACPI_BUTTON_TYPE_SLEEP:
b34a8030	177	if (!acpi_sleep_dir)
4be44fcd LB	178	acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
4be44fcd LB	179	acpi_button_dir);
b34a8030 AS	180	entry = acpi_sleep_dir;
	181	break;
	182	case ACPI_BUTTON_TYPE_LID:
	183	if (!acpi_lid_dir)
4be44fcd LB	184	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
4be44fcd LB	185	acpi_button_dir);
b34a8030 AS	186	entry = acpi_lid_dir;
	187	break;
	188	}
	189
	190	if (!entry)
d550d98d	191	return -ENODEV;
b34a8030 AS	192
	193	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	194	if (!acpi_device_dir(device))
d550d98d	195	return -ENODEV;
b34a8030 AS	196
b34a8030 AS	197	/* 'info' [R] */
cf7acfab DL	198	entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
cf7acfab DL	199	S_IRUGO, acpi_device_dir(device),
106c19e7	200	&acpi_button_info_fops, device);
b34a8030	201	if (!entry)
d550d98d	202	return -ENODEV;
b34a8030 AS	203
	204	/* show lid state [R] */
	205	if (button->type == ACPI_BUTTON_TYPE_LID) {
cf7acfab DL	206	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
cf7acfab DL	207	S_IRUGO, acpi_device_dir(device),
106c19e7	208	&acpi_button_state_fops, device);
b34a8030	209	if (!entry)
a6fc6720	210	return -ENODEV;
b34a8030 AS	211	}
b34a8030 AS	212
d550d98d	213	return 0;
b34a8030 AS	214	}
b34a8030 AS	215
4be44fcd	216	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	217	{
c0968f0e	218	struct acpi_button *button = acpi_driver_data(device);
b34a8030	219
b34a8030 AS	220	if (acpi_device_dir(device)) {
	221	if (button->type == ACPI_BUTTON_TYPE_LID)
	222	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	223	acpi_device_dir(device));
b34a8030	224	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	225	acpi_device_dir(device));
b34a8030 AS	226
b34a8030 AS	227	remove_proc_entry(acpi_device_bid(device),
4be44fcd	228	acpi_device_dir(device)->parent);
b34a8030 AS	229	acpi_device_dir(device) = NULL;
	230	}
	231
d550d98d	232	return 0;
b34a8030 AS	233	}
b34a8030 AS	234
1da177e4 LT	235	/* --------------------------------------------------------------------------
	236	Driver Interface
	237	-------------------------------------------------------------------------- */
7e12715e JB	238	int acpi_lid_notifier_register(struct notifier_block *nb)
	239	{
	240	return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
	241	}
	242	EXPORT_SYMBOL(acpi_lid_notifier_register);
	243
	244	int acpi_lid_notifier_unregister(struct notifier_block *nb)
	245	{
	246	return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
	247	}
	248	EXPORT_SYMBOL(acpi_lid_notifier_unregister);
	249
	250	int acpi_lid_open(void)
	251	{
	252	acpi_status status;
	253	unsigned long long state;
	254
2c907b72 JB	255	if (!lid_device)
	256	return -ENODEV;
	257
7e12715e JB	258	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
	259	&state);
	260	if (ACPI_FAILURE(status))
	261	return -ENODEV;
	262
	263	return !!state;
	264	}
	265	EXPORT_SYMBOL(acpi_lid_open);
	266
106c19e7	267	static int acpi_lid_send_state(struct acpi_device *device)
23de5d9e	268	{
106c19e7	269	struct acpi_button *button = acpi_driver_data(device);
27663c58	270	unsigned long long state;
23de5d9e	271	acpi_status status;
7e12715e	272	int ret;
23de5d9e	273
106c19e7	274	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
23de5d9e AS	275	if (ACPI_FAILURE(status))
23de5d9e AS	276	return -ENODEV;
50a4da89	277
23de5d9e AS	278	/* input layer checks if event is redundant */
23de5d9e AS	279	input_report_switch(button->input, SW_LID, !state);
df316e93	280	input_sync(button->input);
7e12715e JB	281
	282	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
	283	if (ret == NOTIFY_DONE)
	284	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
	285	device);
13c199c0 ZY	286	if (ret == NOTIFY_DONE \|\| ret == NOTIFY_OK) {
	287	/*
	288	* It is also regarded as success if the notifier_chain
	289	* returns NOTIFY_OK or NOTIFY_DONE.
	290	*/
	291	ret = 0;
	292	}
7e12715e	293	return ret;
23de5d9e	294	}
1da177e4	295
373cfc36	296	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	297	{
373cfc36	298	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	299	struct input_dev *input;
1da177e4	300
1da177e4	301	switch (event) {
373cfc36 BH	302	case ACPI_FIXED_HARDWARE_EVENT:
	303	event = ACPI_BUTTON_NOTIFY_STATUS;
	304	/* fall through */
1da177e4	305	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	306	input = button->input;
c0968f0e	307	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	308	acpi_lid_send_state(device);
c0968f0e DT	309	} else {
	310	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	311	KEY_SLEEP : KEY_POWER;
	312
	313	input_report_key(input, keycode, 1);
	314	input_sync(input);
	315	input_report_key(input, keycode, 0);
df316e93	316	input_sync(input);
c0968f0e	317	}
c0968f0e	318
106c19e7	319	acpi_bus_generate_proc_event(device, event, ++button->pushed);
1da177e4 LT	320	break;
	321	default:
	322	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	323	"Unsupported event [0x%x]\n", event));
1da177e4 LT	324	break;
1da177e4 LT	325	}
1da177e4 LT	326	}
1da177e4 LT	327
23de5d9e AS	328	static int acpi_button_resume(struct acpi_device *device)
23de5d9e AS	329	{
1bce8113	330	struct acpi_button *button = acpi_driver_data(device);
50a4da89	331
e2fb9754	332	if (button->type == ACPI_BUTTON_TYPE_LID)
106c19e7	333	return acpi_lid_send_state(device);
23de5d9e AS	334	return 0;
	335	}
	336
c0968f0e DT	337	static int acpi_button_add(struct acpi_device *device)
c0968f0e DT	338	{
c0968f0e DT	339	struct acpi_button *button;
c0968f0e DT	340	struct input_dev *input;
620e112c TR	341	const char *hid = acpi_device_hid(device);
620e112c TR	342	char name, class;
1bce8113	343	int error;
1da177e4	344
c0968f0e	345	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	346	if (!button)
d550d98d	347	return -ENOMEM;
1da177e4	348
db89b4f0	349	device->driver_data = button;
1da177e4	350
c0968f0e DT	351	button->input = input = input_allocate_device();
	352	if (!input) {
	353	error = -ENOMEM;
	354	goto err_free_button;
	355	}
	356
bf04a772 BH	357	name = acpi_device_name(device);
	358	class = acpi_device_class(device);
	359
d68b597c BH	360	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) \|\|
d68b597c BH	361	!strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
1da177e4	362	button->type = ACPI_BUTTON_TYPE_POWER;
bf04a772 BH	363	strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
bf04a772 BH	364	sprintf(class, "%s/%s",
1da177e4	365	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
d68b597c BH	366	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) \|\|
d68b597c BH	367	!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
1da177e4	368	button->type = ACPI_BUTTON_TYPE_SLEEP;
bf04a772 BH	369	strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
bf04a772 BH	370	sprintf(class, "%s/%s",
1da177e4	371	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
bf04a772	372	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
1da177e4	373	button->type = ACPI_BUTTON_TYPE_LID;
bf04a772 BH	374	strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
bf04a772 BH	375	sprintf(class, "%s/%s",
1da177e4	376	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	377	} else {
bf04a772	378	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
c0968f0e DT	379	error = -ENODEV;
c0968f0e DT	380	goto err_free_input;
1da177e4 LT	381	}
1da177e4 LT	382
c0968f0e DT	383	error = acpi_button_add_fs(device);
	384	if (error)
	385	goto err_free_input;
	386
bf04a772	387	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
c0968f0e	388
bf04a772	389	input->name = name;
c0968f0e DT	390	input->phys = button->phys;
	391	input->id.bustype = BUS_HOST;
	392	input->id.product = button->type;
3b34e523	393	input->dev.parent = &device->dev;
b34a8030	394
1da177e4	395	switch (button->type) {
c0968f0e	396	case ACPI_BUTTON_TYPE_POWER:
7b19ada2	397	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	398	set_bit(KEY_POWER, input->keybit);
1da177e4	399	break;
c0968f0e DT	400
c0968f0e DT	401	case ACPI_BUTTON_TYPE_SLEEP:
7b19ada2	402	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	403	set_bit(KEY_SLEEP, input->keybit);
1da177e4	404	break;
c0968f0e DT	405
c0968f0e DT	406	case ACPI_BUTTON_TYPE_LID:
7b19ada2	407	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	408	set_bit(SW_LID, input->swbit);
1da177e4 LT	409	break;
	410	}
	411
c0968f0e DT	412	error = input_register_device(input);
c0968f0e DT	413	if (error)
373cfc36	414	goto err_remove_fs;
7e12715e	415	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	416	acpi_lid_send_state(device);
7e12715e JB	417	/*
	418	* This assumes there's only one lid device, or if there are
	419	* more we only care about the last one...
	420	*/
	421	lid_device = device;
	422	}
1da177e4 LT	423
	424	if (device->wakeup.flags.valid) {
	425	/* Button's GPE is run-wake GPE */
4be44fcd	426	acpi_enable_gpe(device->wakeup.gpe_device,
a44061aa	427	device->wakeup.gpe_number);
f517709d	428	device->wakeup.run_wake_count++;
1da177e4 LT	429	device->wakeup.state.enabled = 1;
	430	}
	431
bf04a772	432	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
c0968f0e	433	return 0;
1da177e4	434
c0968f0e DT	435	err_remove_fs:
	436	acpi_button_remove_fs(device);
	437	err_free_input:
	438	input_free_device(input);
	439	err_free_button:
	440	kfree(button);
	441	return error;
1da177e4 LT	442	}
1da177e4 LT	443
4be44fcd	444	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	445	{
1bce8113	446	struct acpi_button *button = acpi_driver_data(device);
1da177e4	447
9630bdd9 RW	448	if (device->wakeup.flags.valid) {
9630bdd9 RW	449	acpi_disable_gpe(device->wakeup.gpe_device,
a44061aa	450	device->wakeup.gpe_number);
f517709d	451	device->wakeup.run_wake_count--;
9630bdd9 RW	452	device->wakeup.state.enabled = 0;
	453	}
	454
4be44fcd	455	acpi_button_remove_fs(device);
c0968f0e	456	input_unregister_device(button->input);
1da177e4	457	kfree(button);
d550d98d	458	return 0;
1da177e4 LT	459	}
1da177e4 LT	460
4be44fcd	461	static int __init acpi_button_init(void)
1da177e4	462	{
c0968f0e	463	int result;
1da177e4	464
b34a8030 AS	465	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030 AS	466	if (!acpi_button_dir)
d550d98d	467	return -ENODEV;
50a4da89	468
1da177e4 LT	469	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	470	if (result < 0) {
b34a8030	471	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
d550d98d	472	return -ENODEV;
1da177e4 LT	473	}
1da177e4 LT	474
d550d98d	475	return 0;
1da177e4 LT	476	}
1da177e4 LT	477
4be44fcd	478	static void __exit acpi_button_exit(void)
1da177e4	479	{
1da177e4 LT	480	acpi_bus_unregister_driver(&acpi_button_driver);
1da177e4 LT	481
4be44fcd	482	if (acpi_power_dir)
b34a8030 AS	483	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	484	if (acpi_sleep_dir)
	485	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	486	if (acpi_lid_dir)
	487	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	488	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
1da177e4 LT	489	}
1da177e4 LT	490
1da177e4 LT	491	module_init(acpi_button_init);
1da177e4 LT	492	module_exit(acpi_button_exit);