[mirror_ubuntu-bionic-kernel.git] / drivers / acpi / button.c

/*
 *  button.c - ACPI Button Driver
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/input.h>
#include <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;

	if (!button || !button->device)
		return 0;

	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;

	if (!button || !button->device)
		return 0;

	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;

	if (!device || !acpi_driver_data(device))
		return -EINVAL;

	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;

	if (!button || !button->device)
		return;

	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;

	if (!device)
		return -EINVAL;
	button = acpi_driver_data(device);
	if (button && 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;

	if (!device)
		return -EINVAL;

	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;

	if (!device || !acpi_driver_data(device))
		return -EINVAL;

	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 AS	130
b34a8030 AS	131	if (!button \|\| !button->device)
d550d98d	132	return 0;
b34a8030	133
4be44fcd LB	134	seq_printf(seq, "type: %s\n",
4be44fcd LB	135	acpi_device_name(button->device));
d550d98d	136	return 0;
b34a8030 AS	137	}
	138
	139	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	140	{
	141	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	142	}
4be44fcd	143
b34a8030 AS	144	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	145	{
c0968f0e	146	struct acpi_button *button = seq->private;
4be44fcd	147	acpi_status status;
27663c58	148	unsigned long long state;
b34a8030	149
b34a8030	150	if (!button \|\| !button->device)
d550d98d	151	return 0;
b34a8030	152
27b1d3e8	153	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
c0968f0e DT	154	seq_printf(seq, "state: %s\n",
	155	ACPI_FAILURE(status) ? "unsupported" :
	156	(state ? "open" : "closed"));
d550d98d	157	return 0;
b34a8030 AS	158	}
	159
	160	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	161	{
	162	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	163	}
	164
	165	static struct proc_dir_entry *acpi_power_dir;
	166	static struct proc_dir_entry *acpi_sleep_dir;
	167	static struct proc_dir_entry *acpi_lid_dir;
	168
4be44fcd	169	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	170	{
4be44fcd	171	struct proc_dir_entry *entry = NULL;
c0968f0e	172	struct acpi_button *button;
b34a8030 AS	173
b34a8030 AS	174	if (!device \|\| !acpi_driver_data(device))
d550d98d	175	return -EINVAL;
b34a8030 AS	176
	177	button = acpi_driver_data(device);
	178
	179	switch (button->type) {
	180	case ACPI_BUTTON_TYPE_POWER:
	181	case ACPI_BUTTON_TYPE_POWERF:
	182	if (!acpi_power_dir)
4be44fcd LB	183	acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
4be44fcd LB	184	acpi_button_dir);
b34a8030 AS	185	entry = acpi_power_dir;
	186	break;
	187	case ACPI_BUTTON_TYPE_SLEEP:
	188	case ACPI_BUTTON_TYPE_SLEEPF:
	189	if (!acpi_sleep_dir)
4be44fcd LB	190	acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
4be44fcd LB	191	acpi_button_dir);
b34a8030 AS	192	entry = acpi_sleep_dir;
	193	break;
	194	case ACPI_BUTTON_TYPE_LID:
	195	if (!acpi_lid_dir)
4be44fcd LB	196	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
4be44fcd LB	197	acpi_button_dir);
b34a8030 AS	198	entry = acpi_lid_dir;
	199	break;
	200	}
	201
	202	if (!entry)
d550d98d	203	return -ENODEV;
b34a8030 AS	204
	205	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	206	if (!acpi_device_dir(device))
d550d98d	207	return -ENODEV;
b34a8030 AS	208
b34a8030 AS	209	/* 'info' [R] */
cf7acfab DL	210	entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
	211	S_IRUGO, acpi_device_dir(device),
	212	&acpi_button_info_fops,
	213	acpi_driver_data(device));
b34a8030	214	if (!entry)
d550d98d	215	return -ENODEV;
b34a8030 AS	216
	217	/* show lid state [R] */
	218	if (button->type == ACPI_BUTTON_TYPE_LID) {
cf7acfab DL	219	entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
	220	S_IRUGO, acpi_device_dir(device),
	221	&acpi_button_state_fops,
	222	acpi_driver_data(device));
b34a8030	223	if (!entry)
a6fc6720	224	return -ENODEV;
b34a8030 AS	225	}
b34a8030 AS	226
d550d98d	227	return 0;
b34a8030 AS	228	}
b34a8030 AS	229
4be44fcd	230	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	231	{
c0968f0e	232	struct acpi_button *button = acpi_driver_data(device);
b34a8030	233
b34a8030 AS	234	if (acpi_device_dir(device)) {
	235	if (button->type == ACPI_BUTTON_TYPE_LID)
	236	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	237	acpi_device_dir(device));
b34a8030	238	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	239	acpi_device_dir(device));
b34a8030 AS	240
b34a8030 AS	241	remove_proc_entry(acpi_device_bid(device),
4be44fcd	242	acpi_device_dir(device)->parent);
b34a8030 AS	243	acpi_device_dir(device) = NULL;
	244	}
	245
d550d98d	246	return 0;
b34a8030 AS	247	}
b34a8030 AS	248
1da177e4 LT	249	/* --------------------------------------------------------------------------
	250	Driver Interface
	251	-------------------------------------------------------------------------- */
23de5d9e AS	252	static int acpi_lid_send_state(struct acpi_button *button)
23de5d9e AS	253	{
27663c58	254	unsigned long long state;
23de5d9e AS	255	acpi_status status;
	256
	257	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL,
	258	&state);
	259	if (ACPI_FAILURE(status))
	260	return -ENODEV;
50a4da89	261
23de5d9e AS	262	/* input layer checks if event is redundant */
23de5d9e AS	263	input_report_switch(button->input, SW_LID, !state);
df316e93	264	input_sync(button->input);
23de5d9e AS	265	return 0;
23de5d9e AS	266	}
1da177e4	267
373cfc36	268	static void acpi_button_notify(struct acpi_device *device, u32 event)
1da177e4	269	{
373cfc36	270	struct acpi_button *button = acpi_driver_data(device);
c0968f0e	271	struct input_dev *input;
1da177e4 LT	272
1da177e4 LT	273	if (!button \|\| !button->device)
d550d98d	274	return;
1da177e4 LT	275
1da177e4 LT	276	switch (event) {
373cfc36 BH	277	case ACPI_FIXED_HARDWARE_EVENT:
	278	event = ACPI_BUTTON_NOTIFY_STATUS;
	279	/* fall through */
1da177e4	280	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e	281	input = button->input;
c0968f0e	282	if (button->type == ACPI_BUTTON_TYPE_LID) {
23de5d9e	283	acpi_lid_send_state(button);
c0968f0e DT	284	} else {
	285	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	286	KEY_SLEEP : KEY_POWER;
	287
	288	input_report_key(input, keycode, 1);
	289	input_sync(input);
	290	input_report_key(input, keycode, 0);
df316e93	291	input_sync(input);
c0968f0e	292	}
c0968f0e	293
14e04fb3	294	acpi_bus_generate_proc_event(button->device, event,
4be44fcd	295	++button->pushed);
1da177e4 LT	296	break;
	297	default:
	298	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	299	"Unsupported event [0x%x]\n", event));
1da177e4 LT	300	break;
1da177e4 LT	301	}
1da177e4 LT	302	}
1da177e4 LT	303
23de5d9e AS	304	static int acpi_button_resume(struct acpi_device *device)
	305	{
	306	struct acpi_button *button;
50a4da89	307
23de5d9e AS	308	if (!device)
	309	return -EINVAL;
	310	button = acpi_driver_data(device);
	311	if (button && button->type == ACPI_BUTTON_TYPE_LID)
	312	return acpi_lid_send_state(button);
	313	return 0;
	314	}
	315
c0968f0e DT	316	static int acpi_button_add(struct acpi_device *device)
	317	{
	318	int error;
	319	struct acpi_button *button;
	320	struct input_dev *input;
1da177e4 LT	321
1da177e4 LT	322	if (!device)
d550d98d	323	return -EINVAL;
1da177e4	324
c0968f0e	325	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	326	if (!button)
d550d98d	327	return -ENOMEM;
1da177e4 LT	328
1da177e4 LT	329	button->device = device;
db89b4f0	330	device->driver_data = button;
1da177e4	331
c0968f0e DT	332	button->input = input = input_allocate_device();
	333	if (!input) {
	334	error = -ENOMEM;
	335	goto err_free_button;
	336	}
	337
1da177e4 LT	338	/*
	339	* Determine the button type (via hid), as fixed-feature buttons
	340	* need to be handled a bit differently than generic-space.
	341	*/
	342	if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
	343	button->type = ACPI_BUTTON_TYPE_POWER;
4be44fcd LB	344	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
4be44fcd LB	345	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	346	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	347	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
1da177e4 LT	348	button->type = ACPI_BUTTON_TYPE_POWERF;
1da177e4 LT	349	strcpy(acpi_device_name(device),
4be44fcd LB	350	ACPI_BUTTON_DEVICE_NAME_POWERF);
4be44fcd LB	351	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	352	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	353	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
1da177e4	354	button->type = ACPI_BUTTON_TYPE_SLEEP;
4be44fcd LB	355	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
4be44fcd LB	356	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	357	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	358	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
1da177e4 LT	359	button->type = ACPI_BUTTON_TYPE_SLEEPF;
1da177e4 LT	360	strcpy(acpi_device_name(device),
4be44fcd LB	361	ACPI_BUTTON_DEVICE_NAME_SLEEPF);
4be44fcd LB	362	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	363	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	364	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
1da177e4	365	button->type = ACPI_BUTTON_TYPE_LID;
4be44fcd LB	366	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
4be44fcd LB	367	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	368	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	369	} else {
6468463a LB	370	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
6468463a LB	371	acpi_device_hid(device));
c0968f0e DT	372	error = -ENODEV;
c0968f0e DT	373	goto err_free_input;
1da177e4 LT	374	}
1da177e4 LT	375
c0968f0e DT	376	error = acpi_button_add_fs(device);
	377	if (error)
	378	goto err_free_input;
	379
c0968f0e DT	380	snprintf(button->phys, sizeof(button->phys),
	381	"%s/button/input0", acpi_device_hid(device));
	382
	383	input->name = acpi_device_name(device);
	384	input->phys = button->phys;
	385	input->id.bustype = BUS_HOST;
	386	input->id.product = button->type;
3b34e523	387	input->dev.parent = &device->dev;
b34a8030	388
1da177e4	389	switch (button->type) {
c0968f0e	390	case ACPI_BUTTON_TYPE_POWER:
1da177e4	391	case ACPI_BUTTON_TYPE_POWERF:
7b19ada2	392	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	393	set_bit(KEY_POWER, input->keybit);
1da177e4	394	break;
c0968f0e DT	395
c0968f0e DT	396	case ACPI_BUTTON_TYPE_SLEEP:
1da177e4	397	case ACPI_BUTTON_TYPE_SLEEPF:
7b19ada2	398	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	399	set_bit(KEY_SLEEP, input->keybit);
1da177e4	400	break;
c0968f0e DT	401
c0968f0e DT	402	case ACPI_BUTTON_TYPE_LID:
7b19ada2	403	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	404	set_bit(SW_LID, input->swbit);
1da177e4 LT	405	break;
	406	}
	407
c0968f0e DT	408	error = input_register_device(input);
c0968f0e DT	409	if (error)
373cfc36	410	goto err_remove_fs;
23de5d9e AS	411	if (button->type == ACPI_BUTTON_TYPE_LID)
23de5d9e AS	412	acpi_lid_send_state(button);
1da177e4 LT	413
	414	if (device->wakeup.flags.valid) {
	415	/* Button's GPE is run-wake GPE */
4be44fcd LB	416	acpi_set_gpe_type(device->wakeup.gpe_device,
	417	device->wakeup.gpe_number,
	418	ACPI_GPE_TYPE_WAKE_RUN);
	419	acpi_enable_gpe(device->wakeup.gpe_device,
0b7084ac	420	device->wakeup.gpe_number);
1da177e4 LT	421	device->wakeup.state.enabled = 1;
	422	}
	423
4be44fcd LB	424	printk(KERN_INFO PREFIX "%s [%s]\n",
4be44fcd LB	425	acpi_device_name(device), acpi_device_bid(device));
c0968f0e	426	return 0;
1da177e4	427
c0968f0e DT	428	err_remove_fs:
	429	acpi_button_remove_fs(device);
	430	err_free_input:
	431	input_free_device(input);
	432	err_free_button:
	433	kfree(button);
	434	return error;
1da177e4 LT	435	}
1da177e4 LT	436
4be44fcd	437	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	438	{
c0968f0e	439	struct acpi_button *button;
1da177e4 LT	440
1da177e4 LT	441	if (!device \|\| !acpi_driver_data(device))
d550d98d	442	return -EINVAL;
1da177e4 LT	443
	444	button = acpi_driver_data(device);
	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
4be44fcd	452	static int __init acpi_button_init(void)
1da177e4	453	{
c0968f0e	454	int result;
1da177e4	455
b34a8030 AS	456	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030 AS	457	if (!acpi_button_dir)
d550d98d	458	return -ENODEV;
50a4da89	459
1da177e4 LT	460	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	461	if (result < 0) {
b34a8030	462	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
d550d98d	463	return -ENODEV;
1da177e4 LT	464	}
1da177e4 LT	465
d550d98d	466	return 0;
1da177e4 LT	467	}
1da177e4 LT	468
4be44fcd	469	static void __exit acpi_button_exit(void)
1da177e4	470	{
1da177e4 LT	471	acpi_bus_unregister_driver(&acpi_button_driver);
1da177e4 LT	472
4be44fcd	473	if (acpi_power_dir)
b34a8030 AS	474	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	475	if (acpi_sleep_dir)
	476	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	477	if (acpi_lid_dir)
	478	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	479	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
1da177e4 LT	480	}
1da177e4 LT	481
1da177e4 LT	482	module_init(acpi_button_init);
1da177e4 LT	483	module_exit(acpi_button_exit);