[mirror_ubuntu-zesty-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 <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 void acpi_button_notify(struct acpi_device *device, u32 event);

static int acpi_button_resume(struct device *dev);
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(inode)->data);
}

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);
		}

		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 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;
}

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, 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);
		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;
}

static int __init acpi_button_init(void)
{
	return acpi_bus_register_driver(&acpi_button_driver);
}

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

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);
373cfc36	79	static void acpi_button_notify(struct acpi_device *device, u32 event);
1da177e4	80
1be532de RW	81	static int acpi_button_resume(struct device *dev);
	82	static SIMPLE_DEV_PM_OPS(acpi_button_pm, NULL, acpi_button_resume);
	83
1da177e4	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 = {
	89	.add = acpi_button_add,
	90	.remove = acpi_button_remove,
373cfc36	91	.notify = acpi_button_notify,
c0968f0e	92	},
1be532de	93	.drv.pm = &acpi_button_pm,
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;
c19f9a84	101	bool wakeup_enabled;
1da177e4 LT	102	};
1da177e4 LT	103
7e12715e JB	104	static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
	105	static struct acpi_device *lid_device;
	106
b34a8030 AS	107	/* --------------------------------------------------------------------------
	108	FS Interface (/proc)
	109	-------------------------------------------------------------------------- */
	110
4be44fcd	111	static struct proc_dir_entry *acpi_button_dir;
912b7427	112	static struct proc_dir_entry *acpi_lid_dir;
4be44fcd	113
b34a8030 AS	114	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	115	{
106c19e7	116	struct acpi_device *device = seq->private;
4be44fcd	117	acpi_status status;
27663c58	118	unsigned long long state;
b34a8030	119
106c19e7	120	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
c0968f0e DT	121	seq_printf(seq, "state: %s\n",
	122	ACPI_FAILURE(status) ? "unsupported" :
	123	(state ? "open" : "closed"));
d550d98d	124	return 0;
b34a8030 AS	125	}
	126
	127	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	128	{
	129	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	130	}
	131
912b7427 ZR	132	static const struct file_operations acpi_button_state_fops = {
	133	.owner = THIS_MODULE,
	134	.open = acpi_button_state_open_fs,
	135	.read = seq_read,
	136	.llseek = seq_lseek,
	137	.release = single_release,
	138	};
b34a8030	139
4be44fcd	140	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	141	{
1bce8113	142	struct acpi_button *button = acpi_driver_data(device);
4be44fcd	143	struct proc_dir_entry *entry = NULL;
912b7427	144	int ret = 0;
b34a8030	145
912b7427 ZR	146	/* procfs I/F for ACPI lid device only */
	147	if (button->type != ACPI_BUTTON_TYPE_LID)
	148	return 0;
	149
	150	if (acpi_button_dir \|\| acpi_lid_dir) {
	151	printk(KERN_ERR PREFIX "More than one Lid device found!\n");
	152	return -EEXIST;
b34a8030 AS	153	}
b34a8030 AS	154
912b7427 ZR	155	/* create /proc/acpi/button */
	156	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	157	if (!acpi_button_dir)
d550d98d	158	return -ENODEV;
b34a8030	159
912b7427 ZR	160	/* create /proc/acpi/button/lid */
	161	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	162	if (!acpi_lid_dir) {
	163	ret = -ENODEV;
	164	goto remove_button_dir;
	165	}
b34a8030	166
912b7427 ZR	167	/* create /proc/acpi/button/lid/LID/ */
	168	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
	169	if (!acpi_device_dir(device)) {
	170	ret = -ENODEV;
	171	goto remove_lid_dir;
	172	}
b34a8030	173
912b7427 ZR	174	/* create /proc/acpi/button/lid/LID/state */
	175	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
	176	S_IRUGO, acpi_device_dir(device),
	177	&acpi_button_state_fops, device);
	178	if (!entry) {
	179	ret = -ENODEV;
	180	goto remove_dev_dir;
b34a8030 AS	181	}
b34a8030 AS	182
912b7427 ZR	183	done:
	184	return ret;
	185
	186	remove_dev_dir:
	187	remove_proc_entry(acpi_device_bid(device),
	188	acpi_lid_dir);
	189	acpi_device_dir(device) = NULL;
	190	remove_lid_dir:
	191	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	192	remove_button_dir:
	193	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
	194	goto done;
b34a8030 AS	195	}
b34a8030 AS	196
4be44fcd	197	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	198	{
c0968f0e	199	struct acpi_button *button = acpi_driver_data(device);
b34a8030	200
912b7427 ZR	201	if (button->type != ACPI_BUTTON_TYPE_LID)
912b7427 ZR	202	return 0;
b34a8030	203
912b7427 ZR	204	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
	205	acpi_device_dir(device));
	206	remove_proc_entry(acpi_device_bid(device),
	207	acpi_lid_dir);
	208	acpi_device_dir(device) = NULL;
	209	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	210	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030	211
d550d98d	212	return 0;
b34a8030 AS	213	}
b34a8030 AS	214
1da177e4 LT	215	/* --------------------------------------------------------------------------
	216	Driver Interface
	217	-------------------------------------------------------------------------- */
7e12715e JB	218	int acpi_lid_notifier_register(struct notifier_block *nb)
	219	{
	220	return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
	221	}
	222	EXPORT_SYMBOL(acpi_lid_notifier_register);
	223
	224	int acpi_lid_notifier_unregister(struct notifier_block *nb)
	225	{
	226	return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
	227	}
	228	EXPORT_SYMBOL(acpi_lid_notifier_unregister);
	229
	230	int acpi_lid_open(void)
	231	{
	232	acpi_status status;
	233	unsigned long long state;
	234
2c907b72 JB	235	if (!lid_device)
	236	return -ENODEV;
	237
7e12715e JB	238	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
	239	&state);
	240	if (ACPI_FAILURE(status))
	241	return -ENODEV;
	242
	243	return !!state;
	244	}
	245	EXPORT_SYMBOL(acpi_lid_open);
	246
106c19e7	247	static int acpi_lid_send_state(struct acpi_device *device)
23de5d9e	248	{
106c19e7	249	struct acpi_button *button = acpi_driver_data(device);
27663c58	250	unsigned long long state;
23de5d9e	251	acpi_status status;
7e12715e	252	int ret;
23de5d9e	253
106c19e7	254	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
23de5d9e AS	255	if (ACPI_FAILURE(status))
23de5d9e AS	256	return -ENODEV;
50a4da89	257
23de5d9e AS	258	/* input layer checks if event is redundant */
23de5d9e AS	259	input_report_switch(button->input, SW_LID, !state);
df316e93	260	input_sync(button->input);
7e12715e	261
1f83511b RW	262	if (state)
	263	pm_wakeup_event(&device->dev, 0);
	264
7e12715e JB	265	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
	266	if (ret == NOTIFY_DONE)
	267	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
	268	device);
13c199c0 ZY	269	if (ret == NOTIFY_DONE \|\| ret == NOTIFY_OK) {
	270	/*
	271	* It is also regarded as success if the notifier_chain
	272	* returns NOTIFY_OK or NOTIFY_DONE.
	273	*/
	274	ret = 0;
	275	}
7e12715e	276	return ret;
23de5d9e	277	}
1da177e4	278
373cfc36	279	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	280	{
373cfc36	281	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	282	struct input_dev *input;
1da177e4	283
1da177e4	284	switch (event) {
373cfc36 BH	285	case ACPI_FIXED_HARDWARE_EVENT:
	286	event = ACPI_BUTTON_NOTIFY_STATUS;
	287	/* fall through */
1da177e4	288	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	289	input = button->input;
c0968f0e	290	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	291	acpi_lid_send_state(device);
c0968f0e DT	292	} else {
	293	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	294	KEY_SLEEP : KEY_POWER;
	295
	296	input_report_key(input, keycode, 1);
	297	input_sync(input);
	298	input_report_key(input, keycode, 0);
df316e93	299	input_sync(input);
1f83511b RW	300
1f83511b RW	301	pm_wakeup_event(&device->dev, 0);
c0968f0e	302	}
c0968f0e	303
106c19e7	304	acpi_bus_generate_proc_event(device, event, ++button->pushed);
1da177e4 LT	305	break;
	306	default:
	307	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	308	"Unsupported event [0x%x]\n", event));
1da177e4 LT	309	break;
1da177e4 LT	310	}
1da177e4 LT	311	}
1da177e4 LT	312
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;
	321	}
	322
c0968f0e DT	323	static int acpi_button_add(struct acpi_device *device)
c0968f0e DT	324	{
c0968f0e DT	325	struct acpi_button *button;
c0968f0e DT	326	struct input_dev *input;
620e112c TR	327	const char *hid = acpi_device_hid(device);
620e112c TR	328	char name, class;
1bce8113	329	int error;
1da177e4	330
c0968f0e	331	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	332	if (!button)
d550d98d	333	return -ENOMEM;
1da177e4	334
db89b4f0	335	device->driver_data = button;
1da177e4	336
c0968f0e DT	337	button->input = input = input_allocate_device();
	338	if (!input) {
	339	error = -ENOMEM;
	340	goto err_free_button;
	341	}
	342
bf04a772 BH	343	name = acpi_device_name(device);
	344	class = acpi_device_class(device);
	345
d68b597c BH	346	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) \|\|
d68b597c BH	347	!strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
1da177e4	348	button->type = ACPI_BUTTON_TYPE_POWER;
bf04a772 BH	349	strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
bf04a772 BH	350	sprintf(class, "%s/%s",
1da177e4	351	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
d68b597c BH	352	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) \|\|
d68b597c BH	353	!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
1da177e4	354	button->type = ACPI_BUTTON_TYPE_SLEEP;
bf04a772 BH	355	strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
bf04a772 BH	356	sprintf(class, "%s/%s",
1da177e4	357	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
bf04a772	358	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
1da177e4	359	button->type = ACPI_BUTTON_TYPE_LID;
bf04a772 BH	360	strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
bf04a772 BH	361	sprintf(class, "%s/%s",
1da177e4	362	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	363	} else {
bf04a772	364	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
c0968f0e DT	365	error = -ENODEV;
c0968f0e DT	366	goto err_free_input;
1da177e4 LT	367	}
1da177e4 LT	368
c0968f0e DT	369	error = acpi_button_add_fs(device);
	370	if (error)
	371	goto err_free_input;
	372
bf04a772	373	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
c0968f0e	374
bf04a772	375	input->name = name;
c0968f0e DT	376	input->phys = button->phys;
	377	input->id.bustype = BUS_HOST;
	378	input->id.product = button->type;
3b34e523	379	input->dev.parent = &device->dev;
b34a8030	380
1da177e4	381	switch (button->type) {
c0968f0e	382	case ACPI_BUTTON_TYPE_POWER:
7b19ada2	383	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	384	set_bit(KEY_POWER, input->keybit);
1da177e4	385	break;
c0968f0e DT	386
c0968f0e DT	387	case ACPI_BUTTON_TYPE_SLEEP:
7b19ada2	388	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	389	set_bit(KEY_SLEEP, input->keybit);
1da177e4	390	break;
c0968f0e DT	391
c0968f0e DT	392	case ACPI_BUTTON_TYPE_LID:
7b19ada2	393	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	394	set_bit(SW_LID, input->swbit);
1da177e4 LT	395	break;
	396	}
	397
c0968f0e DT	398	error = input_register_device(input);
c0968f0e DT	399	if (error)
373cfc36	400	goto err_remove_fs;
7e12715e	401	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	402	acpi_lid_send_state(device);
7e12715e JB	403	/*
	404	* This assumes there's only one lid device, or if there are
	405	* more we only care about the last one...
	406	*/
	407	lid_device = device;
	408	}
1da177e4 LT	409
	410	if (device->wakeup.flags.valid) {
	411	/* Button's GPE is run-wake GPE */
4be44fcd	412	acpi_enable_gpe(device->wakeup.gpe_device,
a44061aa	413	device->wakeup.gpe_number);
c19f9a84 RW	414	if (!device_may_wakeup(&device->dev)) {
	415	device_set_wakeup_enable(&device->dev, true);
	416	button->wakeup_enabled = true;
	417	}
1da177e4 LT	418	}
1da177e4 LT	419
bf04a772	420	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
c0968f0e	421	return 0;
1da177e4	422
c0968f0e DT	423	err_remove_fs:
	424	acpi_button_remove_fs(device);
	425	err_free_input:
	426	input_free_device(input);
	427	err_free_button:
	428	kfree(button);
	429	return error;
1da177e4 LT	430	}
1da177e4 LT	431
4be44fcd	432	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	433	{
1bce8113	434	struct acpi_button *button = acpi_driver_data(device);
1da177e4	435
9630bdd9 RW	436	if (device->wakeup.flags.valid) {
9630bdd9 RW	437	acpi_disable_gpe(device->wakeup.gpe_device,
a44061aa	438	device->wakeup.gpe_number);
c19f9a84 RW	439	if (button->wakeup_enabled)
c19f9a84 RW	440	device_set_wakeup_enable(&device->dev, false);
9630bdd9 RW	441	}
9630bdd9 RW	442
4be44fcd	443	acpi_button_remove_fs(device);
c0968f0e	444	input_unregister_device(button->input);
1da177e4	445	kfree(button);
d550d98d	446	return 0;
1da177e4 LT	447	}
1da177e4 LT	448
4be44fcd	449	static int __init acpi_button_init(void)
1da177e4	450	{
912b7427	451	return acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	452	}
1da177e4 LT	453
4be44fcd	454	static void __exit acpi_button_exit(void)
1da177e4	455	{
1da177e4	456	acpi_bus_unregister_driver(&acpi_button_driver);
1da177e4 LT	457	}
1da177e4 LT	458
1da177e4 LT	459	module_init(acpi_button_init);
1da177e4 LT	460	module_exit(acpi_button_exit);