[mirror_ubuntu-bionic-kernel.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 <linux/acpi.h>
#include <acpi/button.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);
static void acpi_button_notify(struct acpi_device *device, u32 event);

#ifdef CONFIG_PM_SLEEP
static int acpi_button_resume(struct device *dev);
#endif
static SIMPLE_DEV_PM_OPS(acpi_button_pm, NULL, acpi_button_resume);

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

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

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 struct proc_dir_entry *acpi_lid_dir;

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_DATA(inode));
}

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 int acpi_button_add_fs(struct acpi_device *device)
{
	struct acpi_button *button = acpi_driver_data(device);
	struct proc_dir_entry *entry = NULL;
	int ret = 0;

	/* procfs I/F for ACPI lid device only */
	if (button->type != ACPI_BUTTON_TYPE_LID)
		return 0;

	if (acpi_button_dir || acpi_lid_dir) {
		printk(KERN_ERR PREFIX "More than one Lid device found!\n");
		return -EEXIST;
	}

	/* create /proc/acpi/button */
	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	if (!acpi_button_dir)
		return -ENODEV;

	/* create /proc/acpi/button/lid */
	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	if (!acpi_lid_dir) {
		ret = -ENODEV;
		goto remove_button_dir;
	}

	/* create /proc/acpi/button/lid/LID/ */
	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
	if (!acpi_device_dir(device)) {
		ret = -ENODEV;
		goto remove_lid_dir;
	}

	/* create /proc/acpi/button/lid/LID/state */
	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
				 S_IRUGO, acpi_device_dir(device),
				 &acpi_button_state_fops, device);
	if (!entry) {
		ret = -ENODEV;
		goto remove_dev_dir;
	}

done:
	return ret;

remove_dev_dir:
	remove_proc_entry(acpi_device_bid(device),
			  acpi_lid_dir);
	acpi_device_dir(device) = NULL;
remove_lid_dir:
	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
remove_button_dir:
	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
	goto done;
}

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

	if (button->type != ACPI_BUTTON_TYPE_LID)
		return 0;

	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
			  acpi_device_dir(device));
	remove_proc_entry(acpi_device_bid(device),
			  acpi_lid_dir);
	acpi_device_dir(device) = NULL;
	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);

	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);

	if (state)
		pm_wakeup_event(&device->dev, 0);

	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);

			pm_wakeup_event(&device->dev, 0);
		}
		break;
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
		break;
	}
}

#ifdef CONFIG_PM_SLEEP
static int acpi_button_resume(struct device *dev)
{
	struct acpi_device *device = to_acpi_device(dev);
	struct acpi_button *button = acpi_driver_data(device);

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

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_set_capability(input, EV_KEY, KEY_POWER);
		break;

	case ACPI_BUTTON_TYPE_SLEEP:
		input_set_capability(input, EV_KEY, KEY_SLEEP);
		break;

	case ACPI_BUTTON_TYPE_LID:
		input_set_capability(input, EV_SW, SW_LID);
		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;
	}

	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)
{
	struct acpi_button *button = acpi_driver_data(device);

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

module_acpi_driver(acpi_button_driver);
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>
8b48463f	34	#include <linux/acpi.h>
6270da6f	35	#include <acpi/button.h>
1da177e4	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	77	static int acpi_button_add(struct acpi_device *device);
51fac838	78	static int acpi_button_remove(struct acpi_device *device);
373cfc36	79	static void acpi_button_notify(struct acpi_device *device, u32 event);
1da177e4	80
90692404	81	#ifdef CONFIG_PM_SLEEP
1be532de	82	static int acpi_button_resume(struct device *dev);
90692404	83	#endif
1be532de RW	84	static SIMPLE_DEV_PM_OPS(acpi_button_pm, NULL, acpi_button_resume);
1be532de RW	85
1da177e4	86	static struct acpi_driver acpi_button_driver = {
c2b6705b	87	.name = "button",
4be44fcd	88	.class = ACPI_BUTTON_CLASS,
1ba90e3a	89	.ids = button_device_ids,
4be44fcd LB	90	.ops = {
	91	.add = acpi_button_add,
	92	.remove = acpi_button_remove,
373cfc36	93	.notify = acpi_button_notify,
c0968f0e	94	},
1be532de	95	.drv.pm = &acpi_button_pm,
1da177e4 LT	96	};
	97
	98	struct acpi_button {
c0968f0e DT	99	unsigned int type;
	100	struct input_dev *input;
	101	char phys[32]; /* for input device */
4be44fcd	102	unsigned long pushed;
1da177e4 LT	103	};
1da177e4 LT	104
7e12715e JB	105	static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
	106	static struct acpi_device *lid_device;
	107
b34a8030 AS	108	/* --------------------------------------------------------------------------
	109	FS Interface (/proc)
	110	-------------------------------------------------------------------------- */
	111
4be44fcd	112	static struct proc_dir_entry *acpi_button_dir;
912b7427	113	static struct proc_dir_entry *acpi_lid_dir;
4be44fcd	114
b34a8030 AS	115	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	116	{
106c19e7	117	struct acpi_device *device = seq->private;
4be44fcd	118	acpi_status status;
27663c58	119	unsigned long long state;
b34a8030	120
106c19e7	121	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
c0968f0e DT	122	seq_printf(seq, "state: %s\n",
	123	ACPI_FAILURE(status) ? "unsupported" :
	124	(state ? "open" : "closed"));
d550d98d	125	return 0;
b34a8030 AS	126	}
	127
	128	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	129	{
d9dda78b	130	return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode));
b34a8030 AS	131	}
b34a8030 AS	132
912b7427 ZR	133	static const struct file_operations acpi_button_state_fops = {
	134	.owner = THIS_MODULE,
	135	.open = acpi_button_state_open_fs,
	136	.read = seq_read,
	137	.llseek = seq_lseek,
	138	.release = single_release,
	139	};
b34a8030	140
4be44fcd	141	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	142	{
1bce8113	143	struct acpi_button *button = acpi_driver_data(device);
4be44fcd	144	struct proc_dir_entry *entry = NULL;
912b7427	145	int ret = 0;
b34a8030	146
912b7427 ZR	147	/* procfs I/F for ACPI lid device only */
	148	if (button->type != ACPI_BUTTON_TYPE_LID)
	149	return 0;
	150
	151	if (acpi_button_dir \|\| acpi_lid_dir) {
	152	printk(KERN_ERR PREFIX "More than one Lid device found!\n");
	153	return -EEXIST;
b34a8030 AS	154	}
b34a8030 AS	155
912b7427 ZR	156	/* create /proc/acpi/button */
	157	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	158	if (!acpi_button_dir)
d550d98d	159	return -ENODEV;
b34a8030	160
912b7427 ZR	161	/* create /proc/acpi/button/lid */
	162	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	163	if (!acpi_lid_dir) {
	164	ret = -ENODEV;
	165	goto remove_button_dir;
	166	}
b34a8030	167
912b7427 ZR	168	/* create /proc/acpi/button/lid/LID/ */
	169	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
	170	if (!acpi_device_dir(device)) {
	171	ret = -ENODEV;
	172	goto remove_lid_dir;
	173	}
b34a8030	174
912b7427 ZR	175	/* create /proc/acpi/button/lid/LID/state */
	176	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
	177	S_IRUGO, acpi_device_dir(device),
	178	&acpi_button_state_fops, device);
	179	if (!entry) {
	180	ret = -ENODEV;
	181	goto remove_dev_dir;
b34a8030 AS	182	}
b34a8030 AS	183
912b7427 ZR	184	done:
	185	return ret;
	186
	187	remove_dev_dir:
	188	remove_proc_entry(acpi_device_bid(device),
	189	acpi_lid_dir);
	190	acpi_device_dir(device) = NULL;
	191	remove_lid_dir:
	192	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	193	remove_button_dir:
	194	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
	195	goto done;
b34a8030 AS	196	}
b34a8030 AS	197
4be44fcd	198	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	199	{
c0968f0e	200	struct acpi_button *button = acpi_driver_data(device);
b34a8030	201
912b7427 ZR	202	if (button->type != ACPI_BUTTON_TYPE_LID)
912b7427 ZR	203	return 0;
b34a8030	204
912b7427 ZR	205	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
	206	acpi_device_dir(device));
	207	remove_proc_entry(acpi_device_bid(device),
	208	acpi_lid_dir);
	209	acpi_device_dir(device) = NULL;
	210	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	211	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030	212
d550d98d	213	return 0;
b34a8030 AS	214	}
b34a8030 AS	215
1da177e4 LT	216	/* --------------------------------------------------------------------------
	217	Driver Interface
	218	-------------------------------------------------------------------------- */
7e12715e JB	219	int acpi_lid_notifier_register(struct notifier_block *nb)
	220	{
	221	return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
	222	}
	223	EXPORT_SYMBOL(acpi_lid_notifier_register);
	224
	225	int acpi_lid_notifier_unregister(struct notifier_block *nb)
	226	{
	227	return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
	228	}
	229	EXPORT_SYMBOL(acpi_lid_notifier_unregister);
	230
	231	int acpi_lid_open(void)
	232	{
	233	acpi_status status;
	234	unsigned long long state;
	235
2c907b72 JB	236	if (!lid_device)
	237	return -ENODEV;
	238
7e12715e JB	239	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
	240	&state);
	241	if (ACPI_FAILURE(status))
	242	return -ENODEV;
	243
	244	return !!state;
	245	}
	246	EXPORT_SYMBOL(acpi_lid_open);
	247
106c19e7	248	static int acpi_lid_send_state(struct acpi_device *device)
23de5d9e	249	{
106c19e7	250	struct acpi_button *button = acpi_driver_data(device);
27663c58	251	unsigned long long state;
23de5d9e	252	acpi_status status;
7e12715e	253	int ret;
23de5d9e	254
106c19e7	255	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
23de5d9e AS	256	if (ACPI_FAILURE(status))
23de5d9e AS	257	return -ENODEV;
50a4da89	258
23de5d9e AS	259	/* input layer checks if event is redundant */
23de5d9e AS	260	input_report_switch(button->input, SW_LID, !state);
df316e93	261	input_sync(button->input);
7e12715e	262
1f83511b RW	263	if (state)
	264	pm_wakeup_event(&device->dev, 0);
	265
7e12715e JB	266	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
	267	if (ret == NOTIFY_DONE)
	268	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
	269	device);
13c199c0 ZY	270	if (ret == NOTIFY_DONE \|\| ret == NOTIFY_OK) {
	271	/*
	272	* It is also regarded as success if the notifier_chain
	273	* returns NOTIFY_OK or NOTIFY_DONE.
	274	*/
	275	ret = 0;
	276	}
7e12715e	277	return ret;
23de5d9e	278	}
1da177e4	279
373cfc36	280	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	281	{
373cfc36	282	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	283	struct input_dev *input;
1da177e4	284
1da177e4	285	switch (event) {
373cfc36 BH	286	case ACPI_FIXED_HARDWARE_EVENT:
	287	event = ACPI_BUTTON_NOTIFY_STATUS;
	288	/* fall through */
1da177e4	289	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	290	input = button->input;
c0968f0e	291	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	292	acpi_lid_send_state(device);
c0968f0e DT	293	} else {
	294	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	295	KEY_SLEEP : KEY_POWER;
	296
	297	input_report_key(input, keycode, 1);
	298	input_sync(input);
	299	input_report_key(input, keycode, 0);
df316e93	300	input_sync(input);
1f83511b RW	301
1f83511b RW	302	pm_wakeup_event(&device->dev, 0);
c0968f0e	303	}
1da177e4 LT	304	break;
	305	default:
	306	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	307	"Unsupported event [0x%x]\n", event));
1da177e4 LT	308	break;
1da177e4 LT	309	}
1da177e4 LT	310	}
1da177e4 LT	311
90692404	312	#ifdef CONFIG_PM_SLEEP
1be532de	313	static int acpi_button_resume(struct device *dev)
23de5d9e	314	{
1be532de	315	struct acpi_device *device = to_acpi_device(dev);
1bce8113	316	struct acpi_button *button = acpi_driver_data(device);
50a4da89	317
e2fb9754	318	if (button->type == ACPI_BUTTON_TYPE_LID)
106c19e7	319	return acpi_lid_send_state(device);
23de5d9e AS	320	return 0;
23de5d9e AS	321	}
90692404	322	#endif
23de5d9e	323
c0968f0e DT	324	static int acpi_button_add(struct acpi_device *device)
c0968f0e DT	325	{
c0968f0e DT	326	struct acpi_button *button;
c0968f0e DT	327	struct input_dev *input;
620e112c TR	328	const char *hid = acpi_device_hid(device);
620e112c TR	329	char name, class;
1bce8113	330	int error;
1da177e4	331
c0968f0e	332	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	333	if (!button)
d550d98d	334	return -ENOMEM;
1da177e4	335
db89b4f0	336	device->driver_data = button;
1da177e4	337
c0968f0e DT	338	button->input = input = input_allocate_device();
	339	if (!input) {
	340	error = -ENOMEM;
	341	goto err_free_button;
	342	}
	343
bf04a772 BH	344	name = acpi_device_name(device);
	345	class = acpi_device_class(device);
	346
d68b597c BH	347	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) \|\|
d68b597c BH	348	!strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
1da177e4	349	button->type = ACPI_BUTTON_TYPE_POWER;
bf04a772 BH	350	strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
bf04a772 BH	351	sprintf(class, "%s/%s",
1da177e4	352	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
d68b597c BH	353	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) \|\|
d68b597c BH	354	!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
1da177e4	355	button->type = ACPI_BUTTON_TYPE_SLEEP;
bf04a772 BH	356	strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
bf04a772 BH	357	sprintf(class, "%s/%s",
1da177e4	358	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
bf04a772	359	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
1da177e4	360	button->type = ACPI_BUTTON_TYPE_LID;
bf04a772 BH	361	strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
bf04a772 BH	362	sprintf(class, "%s/%s",
1da177e4	363	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	364	} else {
bf04a772	365	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
c0968f0e DT	366	error = -ENODEV;
c0968f0e DT	367	goto err_free_input;
1da177e4 LT	368	}
1da177e4 LT	369
c0968f0e DT	370	error = acpi_button_add_fs(device);
	371	if (error)
	372	goto err_free_input;
	373
bf04a772	374	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
c0968f0e	375
bf04a772	376	input->name = name;
c0968f0e DT	377	input->phys = button->phys;
	378	input->id.bustype = BUS_HOST;
	379	input->id.product = button->type;
3b34e523	380	input->dev.parent = &device->dev;
b34a8030	381
1da177e4	382	switch (button->type) {
c0968f0e	383	case ACPI_BUTTON_TYPE_POWER:
763f527b	384	input_set_capability(input, EV_KEY, KEY_POWER);
1da177e4	385	break;
c0968f0e DT	386
c0968f0e DT	387	case ACPI_BUTTON_TYPE_SLEEP:
763f527b	388	input_set_capability(input, EV_KEY, KEY_SLEEP);
1da177e4	389	break;
c0968f0e DT	390
c0968f0e DT	391	case ACPI_BUTTON_TYPE_LID:
763f527b	392	input_set_capability(input, EV_SW, SW_LID);
1da177e4 LT	393	break;
	394	}
	395
c0968f0e DT	396	error = input_register_device(input);
c0968f0e DT	397	if (error)
373cfc36	398	goto err_remove_fs;
7e12715e	399	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	400	acpi_lid_send_state(device);
7e12715e JB	401	/*
	402	* This assumes there's only one lid device, or if there are
	403	* more we only care about the last one...
	404	*/
	405	lid_device = device;
	406	}
1da177e4	407
bf04a772	408	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
c0968f0e	409	return 0;
1da177e4	410
c0968f0e DT	411	err_remove_fs:
	412	acpi_button_remove_fs(device);
	413	err_free_input:
	414	input_free_device(input);
	415	err_free_button:
	416	kfree(button);
	417	return error;
1da177e4 LT	418	}
1da177e4 LT	419
51fac838	420	static int acpi_button_remove(struct acpi_device *device)
1da177e4	421	{
1bce8113	422	struct acpi_button *button = acpi_driver_data(device);
1da177e4	423
4be44fcd	424	acpi_button_remove_fs(device);
c0968f0e	425	input_unregister_device(button->input);
1da177e4	426	kfree(button);
d550d98d	427	return 0;
1da177e4 LT	428	}
1da177e4 LT	429
466e78f7	430	module_acpi_driver(acpi_button_driver);