[deliverable/linux.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>
#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;
	bool wakeup_enabled;
};

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->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);
		if (!device_may_wakeup(&device->dev)) {
			device_set_wakeup_enable(&device->dev, true);
			button->wakeup_enabled = true;
		}
	}

	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);

	if (device->wakeup.flags.valid) {
		acpi_disable_gpe(device->wakeup.gpe_device,
				device->wakeup.gpe_number);
		if (button->wakeup_enabled)
			device_set_wakeup_enable(&device->dev, false);
	}

	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>
1da177e4 LT	34	#include <acpi/acpi_bus.h>
1da177e4 LT	35	#include <acpi/acpi_drivers.h>
6270da6f	36	#include <acpi/button.h>
1da177e4	37
a192a958 LB	38	#define PREFIX "ACPI: "
a192a958 LB	39
1da177e4	40	#define ACPI_BUTTON_CLASS "button"
b34a8030 AS	41	#define ACPI_BUTTON_FILE_INFO "info"
	42	#define ACPI_BUTTON_FILE_STATE "state"
	43	#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
1da177e4 LT	44	#define ACPI_BUTTON_NOTIFY_STATUS 0x80
	45
	46	#define ACPI_BUTTON_SUBCLASS_POWER "power"
4be44fcd	47	#define ACPI_BUTTON_HID_POWER "PNP0C0C"
d68b597c	48	#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button"
1da177e4	49	#define ACPI_BUTTON_TYPE_POWER 0x01
1da177e4 LT	50
	51	#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
	52	#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
d68b597c	53	#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button"
1da177e4	54	#define ACPI_BUTTON_TYPE_SLEEP 0x03
1da177e4 LT	55
	56	#define ACPI_BUTTON_SUBCLASS_LID "lid"
	57	#define ACPI_BUTTON_HID_LID "PNP0C0D"
	58	#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
	59	#define ACPI_BUTTON_TYPE_LID 0x05
	60
	61	#define _COMPONENT ACPI_BUTTON_COMPONENT
f52fd66d	62	ACPI_MODULE_NAME("button");
1da177e4	63
c0968f0e	64	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	65	MODULE_DESCRIPTION("ACPI Button Driver");
1da177e4 LT	66	MODULE_LICENSE("GPL");
1da177e4 LT	67
1ba90e3a TR	68	static const struct acpi_device_id button_device_ids[] = {
	69	{ACPI_BUTTON_HID_LID, 0},
	70	{ACPI_BUTTON_HID_SLEEP, 0},
	71	{ACPI_BUTTON_HID_SLEEPF, 0},
	72	{ACPI_BUTTON_HID_POWER, 0},
	73	{ACPI_BUTTON_HID_POWERF, 0},
	74	{"", 0},
	75	};
	76	MODULE_DEVICE_TABLE(acpi, button_device_ids);
	77
4be44fcd	78	static int acpi_button_add(struct acpi_device *device);
51fac838	79	static int acpi_button_remove(struct acpi_device *device);
373cfc36	80	static void acpi_button_notify(struct acpi_device *device, u32 event);
1da177e4	81
90692404	82	#ifdef CONFIG_PM_SLEEP
1be532de	83	static int acpi_button_resume(struct device *dev);
90692404	84	#endif
1be532de RW	85	static SIMPLE_DEV_PM_OPS(acpi_button_pm, NULL, acpi_button_resume);
1be532de RW	86
1da177e4	87	static struct acpi_driver acpi_button_driver = {
c2b6705b	88	.name = "button",
4be44fcd	89	.class = ACPI_BUTTON_CLASS,
1ba90e3a	90	.ids = button_device_ids,
4be44fcd LB	91	.ops = {
	92	.add = acpi_button_add,
	93	.remove = acpi_button_remove,
373cfc36	94	.notify = acpi_button_notify,
c0968f0e	95	},
1be532de	96	.drv.pm = &acpi_button_pm,
1da177e4 LT	97	};
	98
	99	struct acpi_button {
c0968f0e DT	100	unsigned int type;
	101	struct input_dev *input;
	102	char phys[32]; /* for input device */
4be44fcd	103	unsigned long pushed;
c19f9a84	104	bool wakeup_enabled;
1da177e4 LT	105	};
1da177e4 LT	106
7e12715e JB	107	static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
	108	static struct acpi_device *lid_device;
	109
b34a8030 AS	110	/* --------------------------------------------------------------------------
	111	FS Interface (/proc)
	112	-------------------------------------------------------------------------- */
	113
4be44fcd	114	static struct proc_dir_entry *acpi_button_dir;
912b7427	115	static struct proc_dir_entry *acpi_lid_dir;
4be44fcd	116
b34a8030 AS	117	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	118	{
106c19e7	119	struct acpi_device *device = seq->private;
4be44fcd	120	acpi_status status;
27663c58	121	unsigned long long state;
b34a8030	122
106c19e7	123	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
c0968f0e DT	124	seq_printf(seq, "state: %s\n",
	125	ACPI_FAILURE(status) ? "unsupported" :
	126	(state ? "open" : "closed"));
d550d98d	127	return 0;
b34a8030 AS	128	}
	129
	130	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	131	{
d9dda78b	132	return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode));
b34a8030 AS	133	}
b34a8030 AS	134
912b7427 ZR	135	static const struct file_operations acpi_button_state_fops = {
	136	.owner = THIS_MODULE,
	137	.open = acpi_button_state_open_fs,
	138	.read = seq_read,
	139	.llseek = seq_lseek,
	140	.release = single_release,
	141	};
b34a8030	142
4be44fcd	143	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	144	{
1bce8113	145	struct acpi_button *button = acpi_driver_data(device);
4be44fcd	146	struct proc_dir_entry *entry = NULL;
912b7427	147	int ret = 0;
b34a8030	148
912b7427 ZR	149	/* procfs I/F for ACPI lid device only */
	150	if (button->type != ACPI_BUTTON_TYPE_LID)
	151	return 0;
	152
	153	if (acpi_button_dir \|\| acpi_lid_dir) {
	154	printk(KERN_ERR PREFIX "More than one Lid device found!\n");
	155	return -EEXIST;
b34a8030 AS	156	}
b34a8030 AS	157
912b7427 ZR	158	/* create /proc/acpi/button */
	159	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	160	if (!acpi_button_dir)
d550d98d	161	return -ENODEV;
b34a8030	162
912b7427 ZR	163	/* create /proc/acpi/button/lid */
	164	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	165	if (!acpi_lid_dir) {
	166	ret = -ENODEV;
	167	goto remove_button_dir;
	168	}
b34a8030	169
912b7427 ZR	170	/* create /proc/acpi/button/lid/LID/ */
	171	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
	172	if (!acpi_device_dir(device)) {
	173	ret = -ENODEV;
	174	goto remove_lid_dir;
	175	}
b34a8030	176
912b7427 ZR	177	/* create /proc/acpi/button/lid/LID/state */
	178	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
	179	S_IRUGO, acpi_device_dir(device),
	180	&acpi_button_state_fops, device);
	181	if (!entry) {
	182	ret = -ENODEV;
	183	goto remove_dev_dir;
b34a8030 AS	184	}
b34a8030 AS	185
912b7427 ZR	186	done:
	187	return ret;
	188
	189	remove_dev_dir:
	190	remove_proc_entry(acpi_device_bid(device),
	191	acpi_lid_dir);
	192	acpi_device_dir(device) = NULL;
	193	remove_lid_dir:
	194	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	195	remove_button_dir:
	196	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
	197	goto done;
b34a8030 AS	198	}
b34a8030 AS	199
4be44fcd	200	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	201	{
c0968f0e	202	struct acpi_button *button = acpi_driver_data(device);
b34a8030	203
912b7427 ZR	204	if (button->type != ACPI_BUTTON_TYPE_LID)
912b7427 ZR	205	return 0;
b34a8030	206
912b7427 ZR	207	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
	208	acpi_device_dir(device));
	209	remove_proc_entry(acpi_device_bid(device),
	210	acpi_lid_dir);
	211	acpi_device_dir(device) = NULL;
	212	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	213	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030	214
d550d98d	215	return 0;
b34a8030 AS	216	}
b34a8030 AS	217
1da177e4 LT	218	/* --------------------------------------------------------------------------
	219	Driver Interface
	220	-------------------------------------------------------------------------- */
7e12715e JB	221	int acpi_lid_notifier_register(struct notifier_block *nb)
	222	{
	223	return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
	224	}
	225	EXPORT_SYMBOL(acpi_lid_notifier_register);
	226
	227	int acpi_lid_notifier_unregister(struct notifier_block *nb)
	228	{
	229	return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
	230	}
	231	EXPORT_SYMBOL(acpi_lid_notifier_unregister);
	232
	233	int acpi_lid_open(void)
	234	{
	235	acpi_status status;
	236	unsigned long long state;
	237
2c907b72 JB	238	if (!lid_device)
	239	return -ENODEV;
	240
7e12715e JB	241	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
	242	&state);
	243	if (ACPI_FAILURE(status))
	244	return -ENODEV;
	245
	246	return !!state;
	247	}
	248	EXPORT_SYMBOL(acpi_lid_open);
	249
106c19e7	250	static int acpi_lid_send_state(struct acpi_device *device)
23de5d9e	251	{
106c19e7	252	struct acpi_button *button = acpi_driver_data(device);
27663c58	253	unsigned long long state;
23de5d9e	254	acpi_status status;
7e12715e	255	int ret;
23de5d9e	256
106c19e7	257	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
23de5d9e AS	258	if (ACPI_FAILURE(status))
23de5d9e AS	259	return -ENODEV;
50a4da89	260
23de5d9e AS	261	/* input layer checks if event is redundant */
23de5d9e AS	262	input_report_switch(button->input, SW_LID, !state);
df316e93	263	input_sync(button->input);
7e12715e	264
1f83511b RW	265	if (state)
	266	pm_wakeup_event(&device->dev, 0);
	267
7e12715e JB	268	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
	269	if (ret == NOTIFY_DONE)
	270	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
	271	device);
13c199c0 ZY	272	if (ret == NOTIFY_DONE \|\| ret == NOTIFY_OK) {
	273	/*
	274	* It is also regarded as success if the notifier_chain
	275	* returns NOTIFY_OK or NOTIFY_DONE.
	276	*/
	277	ret = 0;
	278	}
7e12715e	279	return ret;
23de5d9e	280	}
1da177e4	281
373cfc36	282	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	283	{
373cfc36	284	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	285	struct input_dev *input;
1da177e4	286
1da177e4	287	switch (event) {
373cfc36 BH	288	case ACPI_FIXED_HARDWARE_EVENT:
	289	event = ACPI_BUTTON_NOTIFY_STATUS;
	290	/* fall through */
1da177e4	291	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	292	input = button->input;
c0968f0e	293	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	294	acpi_lid_send_state(device);
c0968f0e DT	295	} else {
	296	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	297	KEY_SLEEP : KEY_POWER;
	298
	299	input_report_key(input, keycode, 1);
	300	input_sync(input);
	301	input_report_key(input, keycode, 0);
df316e93	302	input_sync(input);
1f83511b RW	303
1f83511b RW	304	pm_wakeup_event(&device->dev, 0);
c0968f0e	305	}
1da177e4 LT	306	break;
	307	default:
	308	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	309	"Unsupported event [0x%x]\n", event));
1da177e4 LT	310	break;
1da177e4 LT	311	}
1da177e4 LT	312	}
1da177e4 LT	313
90692404	314	#ifdef CONFIG_PM_SLEEP
1be532de	315	static int acpi_button_resume(struct device *dev)
23de5d9e	316	{
1be532de	317	struct acpi_device *device = to_acpi_device(dev);
1bce8113	318	struct acpi_button *button = acpi_driver_data(device);
50a4da89	319
e2fb9754	320	if (button->type == ACPI_BUTTON_TYPE_LID)
106c19e7	321	return acpi_lid_send_state(device);
23de5d9e AS	322	return 0;
23de5d9e AS	323	}
90692404	324	#endif
23de5d9e	325
c0968f0e DT	326	static int acpi_button_add(struct acpi_device *device)
c0968f0e DT	327	{
c0968f0e DT	328	struct acpi_button *button;
c0968f0e DT	329	struct input_dev *input;
620e112c TR	330	const char *hid = acpi_device_hid(device);
620e112c TR	331	char name, class;
1bce8113	332	int error;
1da177e4	333
c0968f0e	334	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	335	if (!button)
d550d98d	336	return -ENOMEM;
1da177e4	337
db89b4f0	338	device->driver_data = button;
1da177e4	339
c0968f0e DT	340	button->input = input = input_allocate_device();
	341	if (!input) {
	342	error = -ENOMEM;
	343	goto err_free_button;
	344	}
	345
bf04a772 BH	346	name = acpi_device_name(device);
	347	class = acpi_device_class(device);
	348
d68b597c BH	349	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) \|\|
d68b597c BH	350	!strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
1da177e4	351	button->type = ACPI_BUTTON_TYPE_POWER;
bf04a772 BH	352	strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
bf04a772 BH	353	sprintf(class, "%s/%s",
1da177e4	354	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
d68b597c BH	355	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) \|\|
d68b597c BH	356	!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
1da177e4	357	button->type = ACPI_BUTTON_TYPE_SLEEP;
bf04a772 BH	358	strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
bf04a772 BH	359	sprintf(class, "%s/%s",
1da177e4	360	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
bf04a772	361	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
1da177e4	362	button->type = ACPI_BUTTON_TYPE_LID;
bf04a772 BH	363	strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
bf04a772 BH	364	sprintf(class, "%s/%s",
1da177e4	365	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	366	} else {
bf04a772	367	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
c0968f0e DT	368	error = -ENODEV;
c0968f0e DT	369	goto err_free_input;
1da177e4 LT	370	}
1da177e4 LT	371
c0968f0e DT	372	error = acpi_button_add_fs(device);
	373	if (error)
	374	goto err_free_input;
	375
bf04a772	376	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
c0968f0e	377
bf04a772	378	input->name = name;
c0968f0e DT	379	input->phys = button->phys;
	380	input->id.bustype = BUS_HOST;
	381	input->id.product = button->type;
3b34e523	382	input->dev.parent = &device->dev;
b34a8030	383
1da177e4	384	switch (button->type) {
c0968f0e	385	case ACPI_BUTTON_TYPE_POWER:
7b19ada2	386	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	387	set_bit(KEY_POWER, input->keybit);
1da177e4	388	break;
c0968f0e DT	389
c0968f0e DT	390	case ACPI_BUTTON_TYPE_SLEEP:
7b19ada2	391	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	392	set_bit(KEY_SLEEP, input->keybit);
1da177e4	393	break;
c0968f0e DT	394
c0968f0e DT	395	case ACPI_BUTTON_TYPE_LID:
7b19ada2	396	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	397	set_bit(SW_LID, input->swbit);
1da177e4 LT	398	break;
	399	}
	400
c0968f0e DT	401	error = input_register_device(input);
c0968f0e DT	402	if (error)
373cfc36	403	goto err_remove_fs;
7e12715e	404	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	405	acpi_lid_send_state(device);
7e12715e JB	406	/*
	407	* This assumes there's only one lid device, or if there are
	408	* more we only care about the last one...
	409	*/
	410	lid_device = device;
	411	}
1da177e4 LT	412
	413	if (device->wakeup.flags.valid) {
	414	/* Button's GPE is run-wake GPE */
4be44fcd	415	acpi_enable_gpe(device->wakeup.gpe_device,
a44061aa	416	device->wakeup.gpe_number);
c19f9a84 RW	417	if (!device_may_wakeup(&device->dev)) {
	418	device_set_wakeup_enable(&device->dev, true);
	419	button->wakeup_enabled = true;
	420	}
1da177e4 LT	421	}
1da177e4 LT	422
bf04a772	423	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
c0968f0e	424	return 0;
1da177e4	425
c0968f0e DT	426	err_remove_fs:
	427	acpi_button_remove_fs(device);
	428	err_free_input:
	429	input_free_device(input);
	430	err_free_button:
	431	kfree(button);
	432	return error;
1da177e4 LT	433	}
1da177e4 LT	434
51fac838	435	static int acpi_button_remove(struct acpi_device *device)
1da177e4	436	{
1bce8113	437	struct acpi_button *button = acpi_driver_data(device);
1da177e4	438
9630bdd9 RW	439	if (device->wakeup.flags.valid) {
9630bdd9 RW	440	acpi_disable_gpe(device->wakeup.gpe_device,
a44061aa	441	device->wakeup.gpe_number);
c19f9a84 RW	442	if (button->wakeup_enabled)
c19f9a84 RW	443	device_set_wakeup_enable(&device->dev, false);
9630bdd9 RW	444	}
9630bdd9 RW	445
4be44fcd	446	acpi_button_remove_fs(device);
c0968f0e	447	input_unregister_device(button->input);
1da177e4	448	kfree(button);
d550d98d	449	return 0;
1da177e4 LT	450	}
1da177e4 LT	451
466e78f7	452	module_acpi_driver(acpi_button_driver);