[GitHub/mt8127/android_kernel_alcatel_ttab.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 <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#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 (CM)"
#define ACPI_BUTTON_DEVICE_NAME_POWERF	"Power Button (FF)"
#define ACPI_BUTTON_TYPE_POWER		0x01
#define ACPI_BUTTON_TYPE_POWERF		0x02

#define ACPI_BUTTON_SUBCLASS_SLEEP	"sleep"
#define ACPI_BUTTON_HID_SLEEP		"PNP0C0E"
#define ACPI_BUTTON_DEVICE_NAME_SLEEP	"Sleep Button (CM)"
#define ACPI_BUTTON_DEVICE_NAME_SLEEPF	"Sleep Button (FF)"
#define ACPI_BUTTON_TYPE_SLEEP		0x03
#define ACPI_BUTTON_TYPE_SLEEPF		0x04

#define ACPI_BUTTON_SUBCLASS_LID	"lid"
#define ACPI_BUTTON_HID_LID		"PNP0C0D"
#define ACPI_BUTTON_DEVICE_NAME_LID	"Lid Switch"
#define ACPI_BUTTON_TYPE_LID		0x05

#define _COMPONENT		ACPI_BUTTON_COMPONENT
ACPI_MODULE_NAME("button");

MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI Button Driver");
MODULE_LICENSE("GPL");

static const struct acpi_device_id button_device_ids[] = {
	{ACPI_BUTTON_HID_LID,    0},
	{ACPI_BUTTON_HID_SLEEP,  0},
	{ACPI_BUTTON_HID_SLEEPF, 0},
	{ACPI_BUTTON_HID_POWER,  0},
	{ACPI_BUTTON_HID_POWERF, 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, button_device_ids);

static int acpi_button_add(struct acpi_device *device);
static int acpi_button_remove(struct acpi_device *device, int type);
static int acpi_button_resume(struct acpi_device *device);
static void acpi_button_notify(struct acpi_device *device, u32 event);
static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
static int acpi_button_state_open_fs(struct inode *inode, struct file *file);

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

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

static const struct file_operations acpi_button_info_fops = {
	.owner = THIS_MODULE,
	.open = acpi_button_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static const struct file_operations acpi_button_state_fops = {
	.owner = THIS_MODULE,
	.open = acpi_button_state_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */

static struct proc_dir_entry *acpi_button_dir;

static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
{
	struct acpi_button *button = seq->private;

	seq_printf(seq, "type:                    %s\n",
		   acpi_device_name(button->device));
	return 0;
}

static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
}

static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
{
	struct acpi_button *button = seq->private;
	acpi_status status;
	unsigned long long state;

	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
	seq_printf(seq, "state:      %s\n",
		   ACPI_FAILURE(status) ? "unsupported" :
			(state ? "open" : "closed"));
	return 0;
}

static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
}

static struct proc_dir_entry *acpi_power_dir;
static struct proc_dir_entry *acpi_sleep_dir;
static struct proc_dir_entry *acpi_lid_dir;

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

	button = acpi_driver_data(device);

	switch (button->type) {
	case ACPI_BUTTON_TYPE_POWER:
	case ACPI_BUTTON_TYPE_POWERF:
		if (!acpi_power_dir)
			acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
						    acpi_button_dir);
		entry = acpi_power_dir;
		break;
	case ACPI_BUTTON_TYPE_SLEEP:
	case ACPI_BUTTON_TYPE_SLEEPF:
		if (!acpi_sleep_dir)
			acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
						    acpi_button_dir);
		entry = acpi_sleep_dir;
		break;
	case ACPI_BUTTON_TYPE_LID:
		if (!acpi_lid_dir)
			acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
						  acpi_button_dir);
		entry = acpi_lid_dir;
		break;
	}

	if (!entry)
		return -ENODEV;

	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	if (!acpi_device_dir(device))
		return -ENODEV;

	/* 'info' [R] */
	entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
				 S_IRUGO, acpi_device_dir(device),
				 &acpi_button_info_fops,
				 acpi_driver_data(device));
	if (!entry)
		return -ENODEV;

	/* show lid state [R] */
	if (button->type == ACPI_BUTTON_TYPE_LID) {
		entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
					 S_IRUGO, acpi_device_dir(device),
					 &acpi_button_state_fops,
					 acpi_driver_data(device));
		if (!entry)
			return -ENODEV;
	}

	return 0;
}

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

	if (acpi_device_dir(device)) {
		if (button->type == ACPI_BUTTON_TYPE_LID)
			remove_proc_entry(ACPI_BUTTON_FILE_STATE,
					  acpi_device_dir(device));
		remove_proc_entry(ACPI_BUTTON_FILE_INFO,
				  acpi_device_dir(device));

		remove_proc_entry(acpi_device_bid(device),
				  acpi_device_dir(device)->parent);
		acpi_device_dir(device) = NULL;
	}

	return 0;
}

/* --------------------------------------------------------------------------
                                Driver Interface
   -------------------------------------------------------------------------- */
static int acpi_lid_send_state(struct acpi_button *button)
{
	unsigned long long state;
	acpi_status status;

	status = acpi_evaluate_integer(button->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);
	return 0;
}

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(button);
		} else {
			int keycode = test_bit(KEY_SLEEP, input->keybit) ?
						KEY_SLEEP : KEY_POWER;

			input_report_key(input, keycode, 1);
			input_sync(input);
			input_report_key(input, keycode, 0);
			input_sync(input);
		}

		acpi_bus_generate_proc_event(button->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;

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

static int acpi_button_add(struct acpi_device *device)
{
	int error;
	struct acpi_button *button;
	struct input_dev *input;

	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
	if (!button)
		return -ENOMEM;

	button->device = device;
	device->driver_data = button;

	button->input = input = input_allocate_device();
	if (!input) {
		error = -ENOMEM;
		goto err_free_button;
	}

	/*
	 * Determine the button type (via hid), as fixed-feature buttons
	 * need to be handled a bit differently than generic-space.
	 */
	if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
		button->type = ACPI_BUTTON_TYPE_POWER;
		strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
		sprintf(acpi_device_class(device), "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
		button->type = ACPI_BUTTON_TYPE_POWERF;
		strcpy(acpi_device_name(device),
		       ACPI_BUTTON_DEVICE_NAME_POWERF);
		sprintf(acpi_device_class(device), "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
		button->type = ACPI_BUTTON_TYPE_SLEEP;
		strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
		sprintf(acpi_device_class(device), "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
		button->type = ACPI_BUTTON_TYPE_SLEEPF;
		strcpy(acpi_device_name(device),
		       ACPI_BUTTON_DEVICE_NAME_SLEEPF);
		sprintf(acpi_device_class(device), "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
		button->type = ACPI_BUTTON_TYPE_LID;
		strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
		sprintf(acpi_device_class(device), "%s/%s",
			ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
	} else {
		printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
			    acpi_device_hid(device));
		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", acpi_device_hid(device));

	input->name = acpi_device_name(device);
	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:
	case ACPI_BUTTON_TYPE_POWERF:
		input->evbit[0] = BIT_MASK(EV_KEY);
		set_bit(KEY_POWER, input->keybit);
		break;

	case ACPI_BUTTON_TYPE_SLEEP:
	case ACPI_BUTTON_TYPE_SLEEPF:
		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(button);

	if (device->wakeup.flags.valid) {
		/* Button's GPE is run-wake GPE */
		acpi_set_gpe_type(device->wakeup.gpe_device,
				  device->wakeup.gpe_number,
				  ACPI_GPE_TYPE_WAKE_RUN);
		acpi_enable_gpe(device->wakeup.gpe_device,
				device->wakeup.gpe_number);
		device->wakeup.state.enabled = 1;
	}

	printk(KERN_INFO PREFIX "%s [%s]\n",
	       acpi_device_name(device), 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;

	button = acpi_driver_data(device);

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

static int __init acpi_button_init(void)
{
	int result;

	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	if (!acpi_button_dir)
		return -ENODEV;

	result = acpi_bus_register_driver(&acpi_button_driver);
	if (result < 0) {
		remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
		return -ENODEV;
	}

	return 0;
}

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

	if (acpi_power_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	if (acpi_sleep_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	if (acpi_lid_dir)
		remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
}

module_init(acpi_button_init);
module_exit(acpi_button_exit);
Commit	Line	Data
1da177e4	1	/*
50a4da89	2	* button.c - ACPI Button Driver
1da177e4 LT	3	*
	4	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	6	*
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or (at
	12	* your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	22	*
	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/init.h>
b34a8030 AS	29	#include <linux/types.h>
	30	#include <linux/proc_fs.h>
	31	#include <linux/seq_file.h>
c0968f0e	32	#include <linux/input.h>
1da177e4 LT	33	#include <acpi/acpi_bus.h>
	34	#include <acpi/acpi_drivers.h>
	35
1da177e4	36	#define ACPI_BUTTON_CLASS "button"
b34a8030 AS	37	#define ACPI_BUTTON_FILE_INFO "info"
	38	#define ACPI_BUTTON_FILE_STATE "state"
	39	#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
1da177e4 LT	40	#define ACPI_BUTTON_NOTIFY_STATUS 0x80
	41
	42	#define ACPI_BUTTON_SUBCLASS_POWER "power"
4be44fcd	43	#define ACPI_BUTTON_HID_POWER "PNP0C0C"
1da177e4 LT	44	#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
	45	#define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
	46	#define ACPI_BUTTON_TYPE_POWER 0x01
	47	#define ACPI_BUTTON_TYPE_POWERF 0x02
	48
	49	#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
	50	#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
	51	#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
	52	#define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
	53	#define ACPI_BUTTON_TYPE_SLEEP 0x03
	54	#define ACPI_BUTTON_TYPE_SLEEPF 0x04
	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 LB	78	static int acpi_button_add(struct acpi_device *device);
4be44fcd LB	79	static int acpi_button_remove(struct acpi_device *device, int type);
23de5d9e	80	static int acpi_button_resume(struct acpi_device *device);
373cfc36	81	static void acpi_button_notify(struct acpi_device *device, u32 event);
b34a8030 AS	82	static int acpi_button_info_open_fs(struct inode inode, struct file file);
b34a8030 AS	83	static int acpi_button_state_open_fs(struct inode inode, struct file file);
1da177e4 LT	84
1da177e4 LT	85	static struct acpi_driver acpi_button_driver = {
c2b6705b	86	.name = "button",
4be44fcd	87	.class = ACPI_BUTTON_CLASS,
1ba90e3a	88	.ids = button_device_ids,
4be44fcd LB	89	.ops = {
4be44fcd LB	90	.add = acpi_button_add,
23de5d9e	91	.resume = acpi_button_resume,
4be44fcd	92	.remove = acpi_button_remove,
373cfc36	93	.notify = acpi_button_notify,
c0968f0e	94	},
1da177e4 LT	95	};
	96
	97	struct acpi_button {
4be44fcd	98	struct acpi_device device; / Fixed button kludge */
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
d7508032	105	static const struct file_operations acpi_button_info_fops = {
cf7acfab	106	.owner = THIS_MODULE,
4be44fcd LB	107	.open = acpi_button_info_open_fs,
	108	.read = seq_read,
	109	.llseek = seq_lseek,
	110	.release = single_release,
b34a8030 AS	111	};
b34a8030 AS	112
d7508032	113	static const struct file_operations acpi_button_state_fops = {
cf7acfab	114	.owner = THIS_MODULE,
4be44fcd LB	115	.open = acpi_button_state_open_fs,
	116	.read = seq_read,
	117	.llseek = seq_lseek,
	118	.release = single_release,
b34a8030	119	};
4be44fcd	120
b34a8030 AS	121	/* --------------------------------------------------------------------------
	122	FS Interface (/proc)
	123	-------------------------------------------------------------------------- */
	124
4be44fcd	125	static struct proc_dir_entry *acpi_button_dir;
b34a8030 AS	126
	127	static int acpi_button_info_seq_show(struct seq_file seq, void offset)
	128	{
c0968f0e	129	struct acpi_button *button = seq->private;
b34a8030	130
4be44fcd LB	131	seq_printf(seq, "type: %s\n",
4be44fcd LB	132	acpi_device_name(button->device));
d550d98d	133	return 0;
b34a8030 AS	134	}
	135
	136	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	137	{
	138	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	139	}
4be44fcd	140
b34a8030 AS	141	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	142	{
c0968f0e	143	struct acpi_button *button = seq->private;
4be44fcd	144	acpi_status status;
27663c58	145	unsigned long long state;
b34a8030	146
27b1d3e8	147	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
c0968f0e DT	148	seq_printf(seq, "state: %s\n",
	149	ACPI_FAILURE(status) ? "unsupported" :
	150	(state ? "open" : "closed"));
d550d98d	151	return 0;
b34a8030 AS	152	}
	153
	154	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	155	{
	156	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	157	}
	158
	159	static struct proc_dir_entry *acpi_power_dir;
	160	static struct proc_dir_entry *acpi_sleep_dir;
	161	static struct proc_dir_entry *acpi_lid_dir;
	162
4be44fcd	163	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	164	{
4be44fcd	165	struct proc_dir_entry *entry = NULL;
c0968f0e	166	struct acpi_button *button;
b34a8030	167
b34a8030 AS	168	button = acpi_driver_data(device);
	169
	170	switch (button->type) {
	171	case ACPI_BUTTON_TYPE_POWER:
	172	case ACPI_BUTTON_TYPE_POWERF:
	173	if (!acpi_power_dir)
4be44fcd LB	174	acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
4be44fcd LB	175	acpi_button_dir);
b34a8030 AS	176	entry = acpi_power_dir;
	177	break;
	178	case ACPI_BUTTON_TYPE_SLEEP:
	179	case ACPI_BUTTON_TYPE_SLEEPF:
	180	if (!acpi_sleep_dir)
4be44fcd LB	181	acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
4be44fcd LB	182	acpi_button_dir);
b34a8030 AS	183	entry = acpi_sleep_dir;
	184	break;
	185	case ACPI_BUTTON_TYPE_LID:
	186	if (!acpi_lid_dir)
4be44fcd LB	187	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
4be44fcd LB	188	acpi_button_dir);
b34a8030 AS	189	entry = acpi_lid_dir;
	190	break;
	191	}
	192
	193	if (!entry)
d550d98d	194	return -ENODEV;
b34a8030 AS	195
	196	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	197	if (!acpi_device_dir(device))
d550d98d	198	return -ENODEV;
b34a8030 AS	199
b34a8030 AS	200	/* 'info' [R] */
cf7acfab DL	201	entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
	202	S_IRUGO, acpi_device_dir(device),
	203	&acpi_button_info_fops,
	204	acpi_driver_data(device));
b34a8030	205	if (!entry)
d550d98d	206	return -ENODEV;
b34a8030 AS	207
	208	/* show lid state [R] */
	209	if (button->type == ACPI_BUTTON_TYPE_LID) {
cf7acfab DL	210	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
	211	S_IRUGO, acpi_device_dir(device),
	212	&acpi_button_state_fops,
	213	acpi_driver_data(device));
b34a8030	214	if (!entry)
a6fc6720	215	return -ENODEV;
b34a8030 AS	216	}
b34a8030 AS	217
d550d98d	218	return 0;
b34a8030 AS	219	}
b34a8030 AS	220
4be44fcd	221	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	222	{
c0968f0e	223	struct acpi_button *button = acpi_driver_data(device);
b34a8030	224
b34a8030 AS	225	if (acpi_device_dir(device)) {
	226	if (button->type == ACPI_BUTTON_TYPE_LID)
	227	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	228	acpi_device_dir(device));
b34a8030	229	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	230	acpi_device_dir(device));
b34a8030 AS	231
b34a8030 AS	232	remove_proc_entry(acpi_device_bid(device),
4be44fcd	233	acpi_device_dir(device)->parent);
b34a8030 AS	234	acpi_device_dir(device) = NULL;
	235	}
	236
d550d98d	237	return 0;
b34a8030 AS	238	}
b34a8030 AS	239
1da177e4 LT	240	/* --------------------------------------------------------------------------
	241	Driver Interface
	242	-------------------------------------------------------------------------- */
23de5d9e AS	243	static int acpi_lid_send_state(struct acpi_button *button)
23de5d9e AS	244	{
27663c58	245	unsigned long long state;
23de5d9e AS	246	acpi_status status;
	247
	248	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL,
	249	&state);
	250	if (ACPI_FAILURE(status))
	251	return -ENODEV;
50a4da89	252
23de5d9e AS	253	/* input layer checks if event is redundant */
23de5d9e AS	254	input_report_switch(button->input, SW_LID, !state);
df316e93	255	input_sync(button->input);
23de5d9e AS	256	return 0;
23de5d9e AS	257	}
1da177e4	258
373cfc36	259	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	260	{
373cfc36	261	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	262	struct input_dev *input;
1da177e4	263
1da177e4	264	switch (event) {
373cfc36 BH	265	case ACPI_FIXED_HARDWARE_EVENT:
	266	event = ACPI_BUTTON_NOTIFY_STATUS;
	267	/* fall through */
1da177e4	268	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	269	input = button->input;
c0968f0e	270	if (button->type == ACPI_BUTTON_TYPE_LID) {
23de5d9e	271	acpi_lid_send_state(button);
c0968f0e DT	272	} else {
	273	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	274	KEY_SLEEP : KEY_POWER;
	275
	276	input_report_key(input, keycode, 1);
	277	input_sync(input);
	278	input_report_key(input, keycode, 0);
df316e93	279	input_sync(input);
c0968f0e	280	}
c0968f0e	281
14e04fb3	282	acpi_bus_generate_proc_event(button->device, event,
4be44fcd	283	++button->pushed);
1da177e4 LT	284	break;
	285	default:
	286	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	287	"Unsupported event [0x%x]\n", event));
1da177e4 LT	288	break;
1da177e4 LT	289	}
1da177e4 LT	290	}
1da177e4 LT	291
23de5d9e AS	292	static int acpi_button_resume(struct acpi_device *device)
	293	{
	294	struct acpi_button *button;
50a4da89	295
23de5d9e	296	button = acpi_driver_data(device);
e2fb9754	297	if (button->type == ACPI_BUTTON_TYPE_LID)
23de5d9e AS	298	return acpi_lid_send_state(button);
	299	return 0;
	300	}
	301
c0968f0e DT	302	static int acpi_button_add(struct acpi_device *device)
	303	{
	304	int error;
	305	struct acpi_button *button;
	306	struct input_dev *input;
1da177e4	307
c0968f0e	308	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	309	if (!button)
d550d98d	310	return -ENOMEM;
1da177e4 LT	311
1da177e4 LT	312	button->device = device;
db89b4f0	313	device->driver_data = button;
1da177e4	314
c0968f0e DT	315	button->input = input = input_allocate_device();
	316	if (!input) {
	317	error = -ENOMEM;
	318	goto err_free_button;
	319	}
	320
1da177e4 LT	321	/*
	322	* Determine the button type (via hid), as fixed-feature buttons
	323	* need to be handled a bit differently than generic-space.
	324	*/
	325	if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
	326	button->type = ACPI_BUTTON_TYPE_POWER;
4be44fcd LB	327	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
4be44fcd LB	328	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	329	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	330	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
1da177e4 LT	331	button->type = ACPI_BUTTON_TYPE_POWERF;
1da177e4 LT	332	strcpy(acpi_device_name(device),
4be44fcd LB	333	ACPI_BUTTON_DEVICE_NAME_POWERF);
4be44fcd LB	334	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	335	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	336	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
1da177e4	337	button->type = ACPI_BUTTON_TYPE_SLEEP;
4be44fcd LB	338	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
4be44fcd LB	339	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	340	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	341	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
1da177e4 LT	342	button->type = ACPI_BUTTON_TYPE_SLEEPF;
1da177e4 LT	343	strcpy(acpi_device_name(device),
4be44fcd LB	344	ACPI_BUTTON_DEVICE_NAME_SLEEPF);
4be44fcd LB	345	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	346	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	347	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
1da177e4	348	button->type = ACPI_BUTTON_TYPE_LID;
4be44fcd LB	349	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
4be44fcd LB	350	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	351	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	352	} else {
6468463a LB	353	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
6468463a LB	354	acpi_device_hid(device));
c0968f0e DT	355	error = -ENODEV;
c0968f0e DT	356	goto err_free_input;
1da177e4 LT	357	}
1da177e4 LT	358
c0968f0e DT	359	error = acpi_button_add_fs(device);
	360	if (error)
	361	goto err_free_input;
	362
c0968f0e DT	363	snprintf(button->phys, sizeof(button->phys),
	364	"%s/button/input0", acpi_device_hid(device));
	365
	366	input->name = acpi_device_name(device);
	367	input->phys = button->phys;
	368	input->id.bustype = BUS_HOST;
	369	input->id.product = button->type;
3b34e523	370	input->dev.parent = &device->dev;
b34a8030	371
1da177e4	372	switch (button->type) {
c0968f0e	373	case ACPI_BUTTON_TYPE_POWER:
1da177e4	374	case ACPI_BUTTON_TYPE_POWERF:
7b19ada2	375	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	376	set_bit(KEY_POWER, input->keybit);
1da177e4	377	break;
c0968f0e DT	378
c0968f0e DT	379	case ACPI_BUTTON_TYPE_SLEEP:
1da177e4	380	case ACPI_BUTTON_TYPE_SLEEPF:
7b19ada2	381	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	382	set_bit(KEY_SLEEP, input->keybit);
1da177e4	383	break;
c0968f0e DT	384
c0968f0e DT	385	case ACPI_BUTTON_TYPE_LID:
7b19ada2	386	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	387	set_bit(SW_LID, input->swbit);
1da177e4 LT	388	break;
	389	}
	390
c0968f0e DT	391	error = input_register_device(input);
c0968f0e DT	392	if (error)
373cfc36	393	goto err_remove_fs;
23de5d9e AS	394	if (button->type == ACPI_BUTTON_TYPE_LID)
23de5d9e AS	395	acpi_lid_send_state(button);
1da177e4 LT	396
	397	if (device->wakeup.flags.valid) {
	398	/* Button's GPE is run-wake GPE */
4be44fcd LB	399	acpi_set_gpe_type(device->wakeup.gpe_device,
	400	device->wakeup.gpe_number,
	401	ACPI_GPE_TYPE_WAKE_RUN);
	402	acpi_enable_gpe(device->wakeup.gpe_device,
0b7084ac	403	device->wakeup.gpe_number);
1da177e4 LT	404	device->wakeup.state.enabled = 1;
	405	}
	406
4be44fcd LB	407	printk(KERN_INFO PREFIX "%s [%s]\n",
4be44fcd LB	408	acpi_device_name(device), 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
4be44fcd	420	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	421	{
c0968f0e	422	struct acpi_button *button;
1da177e4	423
1da177e4 LT	424	button = acpi_driver_data(device);
1da177e4 LT	425
4be44fcd	426	acpi_button_remove_fs(device);
c0968f0e	427	input_unregister_device(button->input);
1da177e4	428	kfree(button);
d550d98d	429	return 0;
1da177e4 LT	430	}
1da177e4 LT	431
4be44fcd	432	static int __init acpi_button_init(void)
1da177e4	433	{
c0968f0e	434	int result;
1da177e4	435
b34a8030 AS	436	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030 AS	437	if (!acpi_button_dir)
d550d98d	438	return -ENODEV;
50a4da89	439
1da177e4 LT	440	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	441	if (result < 0) {
b34a8030	442	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
d550d98d	443	return -ENODEV;
1da177e4 LT	444	}
1da177e4 LT	445
d550d98d	446	return 0;
1da177e4 LT	447	}
1da177e4 LT	448
4be44fcd	449	static void __exit acpi_button_exit(void)
1da177e4	450	{
1da177e4 LT	451	acpi_bus_unregister_driver(&acpi_button_driver);
1da177e4 LT	452
4be44fcd	453	if (acpi_power_dir)
b34a8030 AS	454	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	455	if (acpi_sleep_dir)
	456	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	457	if (acpi_lid_dir)
	458	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	459	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
1da177e4 LT	460	}
1da177e4 LT	461
1da177e4 LT	462	module_init(acpi_button_init);
1da177e4 LT	463	module_exit(acpi_button_exit);