[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>

#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 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;
	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 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);
		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);
23de5d9e	79	static int acpi_button_resume(struct acpi_device *device);
373cfc36	80	static void acpi_button_notify(struct acpi_device *device, u32 event);
1da177e4 LT	81
1da177e4 LT	82	static struct acpi_driver acpi_button_driver = {
c2b6705b	83	.name = "button",
4be44fcd	84	.class = ACPI_BUTTON_CLASS,
1ba90e3a	85	.ids = button_device_ids,
4be44fcd LB	86	.ops = {
4be44fcd LB	87	.add = acpi_button_add,
23de5d9e	88	.resume = acpi_button_resume,
4be44fcd	89	.remove = acpi_button_remove,
373cfc36	90	.notify = acpi_button_notify,
c0968f0e	91	},
1da177e4 LT	92	};
	93
	94	struct acpi_button {
c0968f0e DT	95	unsigned int type;
	96	struct input_dev *input;
	97	char phys[32]; /* for input device */
4be44fcd	98	unsigned long pushed;
c19f9a84	99	bool wakeup_enabled;
1da177e4 LT	100	};
1da177e4 LT	101
7e12715e JB	102	static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
	103	static struct acpi_device *lid_device;
	104
b34a8030 AS	105	/* --------------------------------------------------------------------------
	106	FS Interface (/proc)
	107	-------------------------------------------------------------------------- */
	108
4be44fcd	109	static struct proc_dir_entry *acpi_button_dir;
912b7427	110	static struct proc_dir_entry *acpi_lid_dir;
4be44fcd	111
b34a8030 AS	112	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	113	{
106c19e7	114	struct acpi_device *device = seq->private;
4be44fcd	115	acpi_status status;
27663c58	116	unsigned long long state;
b34a8030	117
106c19e7	118	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
c0968f0e DT	119	seq_printf(seq, "state: %s\n",
	120	ACPI_FAILURE(status) ? "unsupported" :
	121	(state ? "open" : "closed"));
d550d98d	122	return 0;
b34a8030 AS	123	}
	124
	125	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	126	{
	127	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	128	}
	129
912b7427 ZR	130	static const struct file_operations acpi_button_state_fops = {
	131	.owner = THIS_MODULE,
	132	.open = acpi_button_state_open_fs,
	133	.read = seq_read,
	134	.llseek = seq_lseek,
	135	.release = single_release,
	136	};
b34a8030	137
4be44fcd	138	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	139	{
1bce8113	140	struct acpi_button *button = acpi_driver_data(device);
4be44fcd	141	struct proc_dir_entry *entry = NULL;
912b7427	142	int ret = 0;
b34a8030	143
912b7427 ZR	144	/* procfs I/F for ACPI lid device only */
	145	if (button->type != ACPI_BUTTON_TYPE_LID)
	146	return 0;
	147
	148	if (acpi_button_dir \|\| acpi_lid_dir) {
	149	printk(KERN_ERR PREFIX "More than one Lid device found!\n");
	150	return -EEXIST;
b34a8030 AS	151	}
b34a8030 AS	152
912b7427 ZR	153	/* create /proc/acpi/button */
	154	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	155	if (!acpi_button_dir)
d550d98d	156	return -ENODEV;
b34a8030	157
912b7427 ZR	158	/* create /proc/acpi/button/lid */
	159	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	160	if (!acpi_lid_dir) {
	161	ret = -ENODEV;
	162	goto remove_button_dir;
	163	}
b34a8030	164
912b7427 ZR	165	/* create /proc/acpi/button/lid/LID/ */
	166	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
	167	if (!acpi_device_dir(device)) {
	168	ret = -ENODEV;
	169	goto remove_lid_dir;
	170	}
b34a8030	171
912b7427 ZR	172	/* create /proc/acpi/button/lid/LID/state */
	173	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
	174	S_IRUGO, acpi_device_dir(device),
	175	&acpi_button_state_fops, device);
	176	if (!entry) {
	177	ret = -ENODEV;
	178	goto remove_dev_dir;
b34a8030 AS	179	}
b34a8030 AS	180
912b7427 ZR	181	done:
	182	return ret;
	183
	184	remove_dev_dir:
	185	remove_proc_entry(acpi_device_bid(device),
	186	acpi_lid_dir);
	187	acpi_device_dir(device) = NULL;
	188	remove_lid_dir:
	189	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	190	remove_button_dir:
	191	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
	192	goto done;
b34a8030 AS	193	}
b34a8030 AS	194
4be44fcd	195	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	196	{
c0968f0e	197	struct acpi_button *button = acpi_driver_data(device);
b34a8030	198
912b7427 ZR	199	if (button->type != ACPI_BUTTON_TYPE_LID)
912b7427 ZR	200	return 0;
b34a8030	201
912b7427 ZR	202	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
	203	acpi_device_dir(device));
	204	remove_proc_entry(acpi_device_bid(device),
	205	acpi_lid_dir);
	206	acpi_device_dir(device) = NULL;
	207	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	208	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030	209
d550d98d	210	return 0;
b34a8030 AS	211	}
b34a8030 AS	212
1da177e4 LT	213	/* --------------------------------------------------------------------------
	214	Driver Interface
	215	-------------------------------------------------------------------------- */
7e12715e JB	216	int acpi_lid_notifier_register(struct notifier_block *nb)
	217	{
	218	return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
	219	}
	220	EXPORT_SYMBOL(acpi_lid_notifier_register);
	221
	222	int acpi_lid_notifier_unregister(struct notifier_block *nb)
	223	{
	224	return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
	225	}
	226	EXPORT_SYMBOL(acpi_lid_notifier_unregister);
	227
	228	int acpi_lid_open(void)
	229	{
	230	acpi_status status;
	231	unsigned long long state;
	232
2c907b72 JB	233	if (!lid_device)
	234	return -ENODEV;
	235
7e12715e JB	236	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,
	237	&state);
	238	if (ACPI_FAILURE(status))
	239	return -ENODEV;
	240
	241	return !!state;
	242	}
	243	EXPORT_SYMBOL(acpi_lid_open);
	244
106c19e7	245	static int acpi_lid_send_state(struct acpi_device *device)
23de5d9e	246	{
106c19e7	247	struct acpi_button *button = acpi_driver_data(device);
27663c58	248	unsigned long long state;
23de5d9e	249	acpi_status status;
7e12715e	250	int ret;
23de5d9e	251
106c19e7	252	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);
23de5d9e AS	253	if (ACPI_FAILURE(status))
23de5d9e AS	254	return -ENODEV;
50a4da89	255
23de5d9e AS	256	/* input layer checks if event is redundant */
23de5d9e AS	257	input_report_switch(button->input, SW_LID, !state);
df316e93	258	input_sync(button->input);
7e12715e	259
1f83511b RW	260	if (state)
	261	pm_wakeup_event(&device->dev, 0);
	262
7e12715e JB	263	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
	264	if (ret == NOTIFY_DONE)
	265	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
	266	device);
13c199c0 ZY	267	if (ret == NOTIFY_DONE \|\| ret == NOTIFY_OK) {
	268	/*
	269	* It is also regarded as success if the notifier_chain
	270	* returns NOTIFY_OK or NOTIFY_DONE.
	271	*/
	272	ret = 0;
	273	}
7e12715e	274	return ret;
23de5d9e	275	}
1da177e4	276
373cfc36	277	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	278	{
373cfc36	279	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	280	struct input_dev *input;
1da177e4	281
1da177e4	282	switch (event) {
373cfc36 BH	283	case ACPI_FIXED_HARDWARE_EVENT:
	284	event = ACPI_BUTTON_NOTIFY_STATUS;
	285	/* fall through */
1da177e4	286	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	287	input = button->input;
c0968f0e	288	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	289	acpi_lid_send_state(device);
c0968f0e DT	290	} else {
	291	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	292	KEY_SLEEP : KEY_POWER;
	293
	294	input_report_key(input, keycode, 1);
	295	input_sync(input);
	296	input_report_key(input, keycode, 0);
df316e93	297	input_sync(input);
1f83511b RW	298
1f83511b RW	299	pm_wakeup_event(&device->dev, 0);
c0968f0e	300	}
c0968f0e	301
106c19e7	302	acpi_bus_generate_proc_event(device, event, ++button->pushed);
1da177e4 LT	303	break;
	304	default:
	305	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	306	"Unsupported event [0x%x]\n", event));
1da177e4 LT	307	break;
1da177e4 LT	308	}
1da177e4 LT	309	}
1da177e4 LT	310
23de5d9e AS	311	static int acpi_button_resume(struct acpi_device *device)
23de5d9e AS	312	{
1bce8113	313	struct acpi_button *button = acpi_driver_data(device);
50a4da89	314
e2fb9754	315	if (button->type == ACPI_BUTTON_TYPE_LID)
106c19e7	316	return acpi_lid_send_state(device);
23de5d9e AS	317	return 0;
	318	}
	319
c0968f0e DT	320	static int acpi_button_add(struct acpi_device *device)
c0968f0e DT	321	{
c0968f0e DT	322	struct acpi_button *button;
c0968f0e DT	323	struct input_dev *input;
620e112c TR	324	const char *hid = acpi_device_hid(device);
620e112c TR	325	char name, class;
1bce8113	326	int error;
1da177e4	327
c0968f0e	328	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	329	if (!button)
d550d98d	330	return -ENOMEM;
1da177e4	331
db89b4f0	332	device->driver_data = button;
1da177e4	333
c0968f0e DT	334	button->input = input = input_allocate_device();
	335	if (!input) {
	336	error = -ENOMEM;
	337	goto err_free_button;
	338	}
	339
bf04a772 BH	340	name = acpi_device_name(device);
	341	class = acpi_device_class(device);
	342
d68b597c BH	343	if (!strcmp(hid, ACPI_BUTTON_HID_POWER) \|\|
d68b597c BH	344	!strcmp(hid, ACPI_BUTTON_HID_POWERF)) {
1da177e4	345	button->type = ACPI_BUTTON_TYPE_POWER;
bf04a772 BH	346	strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER);
bf04a772 BH	347	sprintf(class, "%s/%s",
1da177e4	348	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
d68b597c BH	349	} else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) \|\|
d68b597c BH	350	!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) {
1da177e4	351	button->type = ACPI_BUTTON_TYPE_SLEEP;
bf04a772 BH	352	strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP);
bf04a772 BH	353	sprintf(class, "%s/%s",
1da177e4	354	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
bf04a772	355	} else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) {
1da177e4	356	button->type = ACPI_BUTTON_TYPE_LID;
bf04a772 BH	357	strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID);
bf04a772 BH	358	sprintf(class, "%s/%s",
1da177e4	359	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	360	} else {
bf04a772	361	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid);
c0968f0e DT	362	error = -ENODEV;
c0968f0e DT	363	goto err_free_input;
1da177e4 LT	364	}
1da177e4 LT	365
c0968f0e DT	366	error = acpi_button_add_fs(device);
	367	if (error)
	368	goto err_free_input;
	369
bf04a772	370	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid);
c0968f0e	371
bf04a772	372	input->name = name;
c0968f0e DT	373	input->phys = button->phys;
	374	input->id.bustype = BUS_HOST;
	375	input->id.product = button->type;
3b34e523	376	input->dev.parent = &device->dev;
b34a8030	377
1da177e4	378	switch (button->type) {
c0968f0e	379	case ACPI_BUTTON_TYPE_POWER:
7b19ada2	380	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	381	set_bit(KEY_POWER, input->keybit);
1da177e4	382	break;
c0968f0e DT	383
c0968f0e DT	384	case ACPI_BUTTON_TYPE_SLEEP:
7b19ada2	385	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	386	set_bit(KEY_SLEEP, input->keybit);
1da177e4	387	break;
c0968f0e DT	388
c0968f0e DT	389	case ACPI_BUTTON_TYPE_LID:
7b19ada2	390	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	391	set_bit(SW_LID, input->swbit);
1da177e4 LT	392	break;
	393	}
	394
c0968f0e DT	395	error = input_register_device(input);
c0968f0e DT	396	if (error)
373cfc36	397	goto err_remove_fs;
7e12715e	398	if (button->type == ACPI_BUTTON_TYPE_LID) {
106c19e7	399	acpi_lid_send_state(device);
7e12715e JB	400	/*
	401	* This assumes there's only one lid device, or if there are
	402	* more we only care about the last one...
	403	*/
	404	lid_device = device;
	405	}
1da177e4 LT	406
	407	if (device->wakeup.flags.valid) {
	408	/* Button's GPE is run-wake GPE */
4be44fcd	409	acpi_enable_gpe(device->wakeup.gpe_device,
a44061aa	410	device->wakeup.gpe_number);
c19f9a84 RW	411	if (!device_may_wakeup(&device->dev)) {
	412	device_set_wakeup_enable(&device->dev, true);
	413	button->wakeup_enabled = true;
	414	}
1da177e4 LT	415	}
1da177e4 LT	416
bf04a772	417	printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device));
c0968f0e	418	return 0;
1da177e4	419
c0968f0e DT	420	err_remove_fs:
	421	acpi_button_remove_fs(device);
	422	err_free_input:
	423	input_free_device(input);
	424	err_free_button:
	425	kfree(button);
	426	return error;
1da177e4 LT	427	}
1da177e4 LT	428
4be44fcd	429	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	430	{
1bce8113	431	struct acpi_button *button = acpi_driver_data(device);
1da177e4	432
9630bdd9 RW	433	if (device->wakeup.flags.valid) {
9630bdd9 RW	434	acpi_disable_gpe(device->wakeup.gpe_device,
a44061aa	435	device->wakeup.gpe_number);
c19f9a84 RW	436	if (button->wakeup_enabled)
c19f9a84 RW	437	device_set_wakeup_enable(&device->dev, false);
9630bdd9 RW	438	}
9630bdd9 RW	439
4be44fcd	440	acpi_button_remove_fs(device);
c0968f0e	441	input_unregister_device(button->input);
1da177e4	442	kfree(button);
d550d98d	443	return 0;
1da177e4 LT	444	}
1da177e4 LT	445
4be44fcd	446	static int __init acpi_button_init(void)
1da177e4	447	{
912b7427	448	return acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	449	}
1da177e4 LT	450
4be44fcd	451	static void __exit acpi_button_exit(void)
1da177e4	452	{
1da177e4	453	acpi_bus_unregister_driver(&acpi_button_driver);
1da177e4 LT	454	}
1da177e4 LT	455
1da177e4 LT	456	module_init(acpi_button_init);
1da177e4 LT	457	module_exit(acpi_button_exit);