[deliverable/linux.git] / drivers / acpi / button.c

/*
 *  acpi_button.c - ACPI Button Driver ($Revision: 30 $)
 *
 *  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 <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define ACPI_BUTTON_COMPONENT		0x00080000
#define ACPI_BUTTON_DRIVER_NAME		"ACPI Button Driver"
#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("acpi_button")

    MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME);
MODULE_LICENSE("GPL");

static int acpi_button_add(struct acpi_device *device);
static int acpi_button_remove(struct acpi_device *device, int type);
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 = ACPI_BUTTON_DRIVER_NAME,
	.class = ACPI_BUTTON_CLASS,
	.ids = "ACPI_FPB,ACPI_FSB,PNP0C0D,PNP0C0C,PNP0C0E",
	.ops = {
		.add = acpi_button_add,
		.remove = acpi_button_remove,
		},
};

struct acpi_button {
	acpi_handle handle;
	struct acpi_device *device;	/* Fixed button kludge */
	u8 type;
	unsigned long pushed;
};

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

static struct file_operations acpi_button_state_fops = {
	.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 = (struct acpi_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 = (struct acpi_button *)seq->private;
	acpi_status status;
	unsigned long state;


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

	status = acpi_evaluate_integer(button->handle, "_LID", NULL, &state);
	if (ACPI_FAILURE(status)) {
		seq_printf(seq, "state:      unsupported\n");
	} else {
		seq_printf(seq, "state:      %s\n",
			   (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 = NULL;


	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;
	entry->owner = THIS_MODULE;

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

	/* 'info' [R] */
	entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
				  S_IRUGO, acpi_device_dir(device));
	if (!entry)
		return -ENODEV;
	else {
		entry->proc_fops = &acpi_button_info_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

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

	return 0;
}

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


	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 void acpi_button_notify(acpi_handle handle, u32 event, void *data)
{
	struct acpi_button *button = (struct acpi_button *)data;


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

	switch (event) {
	case ACPI_BUTTON_NOTIFY_STATUS:
		acpi_bus_generate_event(button->device, event,
					++button->pushed);
		break;
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
		break;
	}

	return;
}

static acpi_status acpi_button_notify_fixed(void *data)
{
	struct acpi_button *button = (struct acpi_button *)data;


	if (!button)
		return AE_BAD_PARAMETER;

	acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);

	return AE_OK;
}

static int acpi_button_add(struct acpi_device *device)
{
	int result = 0;
	acpi_status status = AE_OK;
	struct acpi_button *button = NULL;


	if (!device)
		return -EINVAL;

	button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
	if (!button)
		return -ENOMEM;
	memset(button, 0, sizeof(struct acpi_button));

	button->device = device;
	button->handle = device->handle;
	acpi_driver_data(device) = 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));
		result = -ENODEV;
		goto end;
	}

	result = acpi_button_add_fs(device);
	if (result)
		goto end;

	switch (button->type) {
	case ACPI_BUTTON_TYPE_POWERF:
		status =
		    acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
						     acpi_button_notify_fixed,
						     button);
		break;
	case ACPI_BUTTON_TYPE_SLEEPF:
		status =
		    acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
						     acpi_button_notify_fixed,
						     button);
		break;
	default:
		status = acpi_install_notify_handler(button->handle,
						     ACPI_DEVICE_NOTIFY,
						     acpi_button_notify,
						     button);
		break;
	}

	if (ACPI_FAILURE(status)) {
		result = -ENODEV;
		goto end;
	}

	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, ACPI_NOT_ISR);
		device->wakeup.state.enabled = 1;
	}

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

      end:
	if (result) {
		acpi_button_remove_fs(device);
		kfree(button);
	}

	return result;
}

static int acpi_button_remove(struct acpi_device *device, int type)
{
	acpi_status status = 0;
	struct acpi_button *button = NULL;


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

	button = acpi_driver_data(device);

	/* Unregister for device notifications. */
	switch (button->type) {
	case ACPI_BUTTON_TYPE_POWERF:
		status =
		    acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
						    acpi_button_notify_fixed);
		break;
	case ACPI_BUTTON_TYPE_SLEEPF:
		status =
		    acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
						    acpi_button_notify_fixed);
		break;
	default:
		status = acpi_remove_notify_handler(button->handle,
						    ACPI_DEVICE_NOTIFY,
						    acpi_button_notify);
		break;
	}

	acpi_button_remove_fs(device);

	kfree(button);

	return 0;
}

static int __init acpi_button_init(void)
{
	int result = 0;


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

	return;
}

module_init(acpi_button_init);
module_exit(acpi_button_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* acpi_button.c - ACPI Button Driver ($Revision: 30 $)
	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>
1da177e4 LT	32	#include <acpi/acpi_bus.h>
	33	#include <acpi/acpi_drivers.h>
	34
1da177e4 LT	35	#define ACPI_BUTTON_COMPONENT 0x00080000
	36	#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
	37	#define ACPI_BUTTON_CLASS "button"
b34a8030 AS	38	#define ACPI_BUTTON_FILE_INFO "info"
	39	#define ACPI_BUTTON_FILE_STATE "state"
	40	#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
1da177e4 LT	41	#define ACPI_BUTTON_NOTIFY_STATUS 0x80
	42
	43	#define ACPI_BUTTON_SUBCLASS_POWER "power"
4be44fcd	44	#define ACPI_BUTTON_HID_POWER "PNP0C0C"
1da177e4 LT	45	#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
	46	#define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
	47	#define ACPI_BUTTON_TYPE_POWER 0x01
	48	#define ACPI_BUTTON_TYPE_POWERF 0x02
	49
	50	#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
	51	#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
	52	#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
	53	#define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
	54	#define ACPI_BUTTON_TYPE_SLEEP 0x03
	55	#define ACPI_BUTTON_TYPE_SLEEPF 0x04
	56
	57	#define ACPI_BUTTON_SUBCLASS_LID "lid"
	58	#define ACPI_BUTTON_HID_LID "PNP0C0D"
	59	#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
	60	#define ACPI_BUTTON_TYPE_LID 0x05
	61
	62	#define _COMPONENT ACPI_BUTTON_COMPONENT
4be44fcd	63	ACPI_MODULE_NAME("acpi_button")
1da177e4	64
4be44fcd	65	MODULE_AUTHOR("Paul Diefenbaugh");
1da177e4 LT	66	MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME);
	67	MODULE_LICENSE("GPL");
	68
4be44fcd LB	69	static int acpi_button_add(struct acpi_device *device);
4be44fcd LB	70	static int acpi_button_remove(struct acpi_device *device, int type);
b34a8030 AS	71	static int acpi_button_info_open_fs(struct inode inode, struct file file);
b34a8030 AS	72	static int acpi_button_state_open_fs(struct inode inode, struct file file);
1da177e4 LT	73
1da177e4 LT	74	static struct acpi_driver acpi_button_driver = {
4be44fcd LB	75	.name = ACPI_BUTTON_DRIVER_NAME,
	76	.class = ACPI_BUTTON_CLASS,
	77	.ids = "ACPI_FPB,ACPI_FSB,PNP0C0D,PNP0C0C,PNP0C0E",
	78	.ops = {
	79	.add = acpi_button_add,
	80	.remove = acpi_button_remove,
	81	},
1da177e4 LT	82	};
	83
	84	struct acpi_button {
4be44fcd LB	85	acpi_handle handle;
	86	struct acpi_device device; / Fixed button kludge */
	87	u8 type;
	88	unsigned long pushed;
1da177e4 LT	89	};
1da177e4 LT	90
b34a8030	91	static struct file_operations acpi_button_info_fops = {
4be44fcd LB	92	.open = acpi_button_info_open_fs,
	93	.read = seq_read,
	94	.llseek = seq_lseek,
	95	.release = single_release,
b34a8030 AS	96	};
	97
	98	static struct file_operations acpi_button_state_fops = {
4be44fcd LB	99	.open = acpi_button_state_open_fs,
	100	.read = seq_read,
	101	.llseek = seq_lseek,
	102	.release = single_release,
b34a8030	103	};
4be44fcd	104
b34a8030 AS	105	/* --------------------------------------------------------------------------
	106	FS Interface (/proc)
	107	-------------------------------------------------------------------------- */
	108
4be44fcd	109	static struct proc_dir_entry *acpi_button_dir;
b34a8030 AS	110
	111	static int acpi_button_info_seq_show(struct seq_file seq, void offset)
	112	{
4be44fcd	113	struct acpi_button button = (struct acpi_button )seq->private;
b34a8030	114
b34a8030 AS	115
b34a8030 AS	116	if (!button \|\| !button->device)
d550d98d	117	return 0;
b34a8030	118
4be44fcd LB	119	seq_printf(seq, "type: %s\n",
4be44fcd LB	120	acpi_device_name(button->device));
b34a8030	121
d550d98d	122	return 0;
b34a8030 AS	123	}
	124
	125	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	126	{
	127	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	128	}
4be44fcd	129
b34a8030 AS	130	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	131	{
4be44fcd LB	132	struct acpi_button button = (struct acpi_button )seq->private;
	133	acpi_status status;
	134	unsigned long state;
b34a8030	135
b34a8030 AS	136
b34a8030 AS	137	if (!button \|\| !button->device)
d550d98d	138	return 0;
b34a8030	139
4be44fcd	140	status = acpi_evaluate_integer(button->handle, "_LID", NULL, &state);
b34a8030 AS	141	if (ACPI_FAILURE(status)) {
b34a8030 AS	142	seq_printf(seq, "state: unsupported\n");
4be44fcd LB	143	} else {
	144	seq_printf(seq, "state: %s\n",
	145	(state ? "open" : "closed"));
b34a8030 AS	146	}
b34a8030 AS	147
d550d98d	148	return 0;
b34a8030 AS	149	}
	150
	151	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	152	{
	153	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	154	}
	155
	156	static struct proc_dir_entry *acpi_power_dir;
	157	static struct proc_dir_entry *acpi_sleep_dir;
	158	static struct proc_dir_entry *acpi_lid_dir;
	159
4be44fcd	160	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	161	{
4be44fcd LB	162	struct proc_dir_entry *entry = NULL;
4be44fcd LB	163	struct acpi_button *button = NULL;
b34a8030	164
b34a8030 AS	165
b34a8030 AS	166	if (!device \|\| !acpi_driver_data(device))
d550d98d	167	return -EINVAL;
b34a8030 AS	168
	169	button = acpi_driver_data(device);
	170
	171	switch (button->type) {
	172	case ACPI_BUTTON_TYPE_POWER:
	173	case ACPI_BUTTON_TYPE_POWERF:
	174	if (!acpi_power_dir)
4be44fcd LB	175	acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
4be44fcd LB	176	acpi_button_dir);
b34a8030 AS	177	entry = acpi_power_dir;
	178	break;
	179	case ACPI_BUTTON_TYPE_SLEEP:
	180	case ACPI_BUTTON_TYPE_SLEEPF:
	181	if (!acpi_sleep_dir)
4be44fcd LB	182	acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
4be44fcd LB	183	acpi_button_dir);
b34a8030 AS	184	entry = acpi_sleep_dir;
	185	break;
	186	case ACPI_BUTTON_TYPE_LID:
	187	if (!acpi_lid_dir)
4be44fcd LB	188	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
4be44fcd LB	189	acpi_button_dir);
b34a8030 AS	190	entry = acpi_lid_dir;
	191	break;
	192	}
	193
	194	if (!entry)
d550d98d	195	return -ENODEV;
b34a8030 AS	196	entry->owner = THIS_MODULE;
	197
	198	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	199	if (!acpi_device_dir(device))
d550d98d	200	return -ENODEV;
b34a8030 AS	201	acpi_device_dir(device)->owner = THIS_MODULE;
	202
	203	/* 'info' [R] */
	204	entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	205	S_IRUGO, acpi_device_dir(device));
b34a8030	206	if (!entry)
d550d98d	207	return -ENODEV;
b34a8030 AS	208	else {
	209	entry->proc_fops = &acpi_button_info_fops;
	210	entry->data = acpi_driver_data(device);
	211	entry->owner = THIS_MODULE;
	212	}
	213
	214	/* show lid state [R] */
	215	if (button->type == ACPI_BUTTON_TYPE_LID) {
	216	entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	217	S_IRUGO, acpi_device_dir(device));
b34a8030	218	if (!entry)
a6fc6720	219	return -ENODEV;
b34a8030 AS	220	else {
	221	entry->proc_fops = &acpi_button_state_fops;
	222	entry->data = acpi_driver_data(device);
	223	entry->owner = THIS_MODULE;
	224	}
	225	}
	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	{
4be44fcd	232	struct acpi_button *button = NULL;
b34a8030	233
b34a8030 AS	234
	235	button = acpi_driver_data(device);
	236	if (acpi_device_dir(device)) {
	237	if (button->type == ACPI_BUTTON_TYPE_LID)
	238	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	239	acpi_device_dir(device));
b34a8030	240	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	241	acpi_device_dir(device));
b34a8030 AS	242
b34a8030 AS	243	remove_proc_entry(acpi_device_bid(device),
4be44fcd	244	acpi_device_dir(device)->parent);
b34a8030 AS	245	acpi_device_dir(device) = NULL;
	246	}
	247
d550d98d	248	return 0;
b34a8030 AS	249	}
b34a8030 AS	250
1da177e4 LT	251	/* --------------------------------------------------------------------------
	252	Driver Interface
	253	-------------------------------------------------------------------------- */
	254
4be44fcd	255	static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
1da177e4	256	{
4be44fcd	257	struct acpi_button button = (struct acpi_button )data;
1da177e4	258
1da177e4 LT	259
1da177e4 LT	260	if (!button \|\| !button->device)
d550d98d	261	return;
1da177e4 LT	262
	263	switch (event) {
	264	case ACPI_BUTTON_NOTIFY_STATUS:
4be44fcd LB	265	acpi_bus_generate_event(button->device, event,
4be44fcd LB	266	++button->pushed);
1da177e4 LT	267	break;
	268	default:
	269	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	270	"Unsupported event [0x%x]\n", event));
1da177e4 LT	271	break;
	272	}
	273
d550d98d	274	return;
1da177e4 LT	275	}
1da177e4 LT	276
4be44fcd	277	static acpi_status acpi_button_notify_fixed(void *data)
1da177e4	278	{
4be44fcd LB	279	struct acpi_button button = (struct acpi_button )data;
4be44fcd LB	280
1da177e4	281
b34a8030	282	if (!button)
d550d98d	283	return AE_BAD_PARAMETER;
1da177e4 LT	284
	285	acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
	286
d550d98d	287	return AE_OK;
1da177e4 LT	288	}
1da177e4 LT	289
4be44fcd	290	static int acpi_button_add(struct acpi_device *device)
1da177e4	291	{
4be44fcd LB	292	int result = 0;
	293	acpi_status status = AE_OK;
	294	struct acpi_button *button = NULL;
1da177e4	295
1da177e4 LT	296
1da177e4 LT	297	if (!device)
d550d98d	298	return -EINVAL;
1da177e4 LT	299
	300	button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
	301	if (!button)
d550d98d	302	return -ENOMEM;
1da177e4 LT	303	memset(button, 0, sizeof(struct acpi_button));
	304
	305	button->device = device;
	306	button->handle = device->handle;
	307	acpi_driver_data(device) = button;
	308
	309	/*
	310	* Determine the button type (via hid), as fixed-feature buttons
	311	* need to be handled a bit differently than generic-space.
	312	*/
	313	if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
	314	button->type = ACPI_BUTTON_TYPE_POWER;
4be44fcd LB	315	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
4be44fcd LB	316	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	317	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	318	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
1da177e4 LT	319	button->type = ACPI_BUTTON_TYPE_POWERF;
1da177e4 LT	320	strcpy(acpi_device_name(device),
4be44fcd LB	321	ACPI_BUTTON_DEVICE_NAME_POWERF);
4be44fcd LB	322	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	323	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	324	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
1da177e4	325	button->type = ACPI_BUTTON_TYPE_SLEEP;
4be44fcd LB	326	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
4be44fcd LB	327	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	328	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	329	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
1da177e4 LT	330	button->type = ACPI_BUTTON_TYPE_SLEEPF;
1da177e4 LT	331	strcpy(acpi_device_name(device),
4be44fcd LB	332	ACPI_BUTTON_DEVICE_NAME_SLEEPF);
4be44fcd LB	333	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	334	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	335	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
1da177e4	336	button->type = ACPI_BUTTON_TYPE_LID;
4be44fcd LB	337	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
4be44fcd LB	338	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	339	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	340	} else {
6468463a LB	341	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
6468463a LB	342	acpi_device_hid(device));
1da177e4 LT	343	result = -ENODEV;
	344	goto end;
	345	}
	346
b34a8030 AS	347	result = acpi_button_add_fs(device);
	348	if (result)
	349	goto end;
	350
1da177e4 LT	351	switch (button->type) {
1da177e4 LT	352	case ACPI_BUTTON_TYPE_POWERF:
4be44fcd LB	353	status =
	354	acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
	355	acpi_button_notify_fixed,
	356	button);
1da177e4 LT	357	break;
1da177e4 LT	358	case ACPI_BUTTON_TYPE_SLEEPF:
4be44fcd LB	359	status =
	360	acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
	361	acpi_button_notify_fixed,
	362	button);
1da177e4 LT	363	break;
1da177e4 LT	364	default:
4be44fcd LB	365	status = acpi_install_notify_handler(button->handle,
	366	ACPI_DEVICE_NOTIFY,
	367	acpi_button_notify,
	368	button);
1da177e4 LT	369	break;
	370	}
	371
	372	if (ACPI_FAILURE(status)) {
1da177e4 LT	373	result = -ENODEV;
	374	goto end;
	375	}
	376
	377	if (device->wakeup.flags.valid) {
	378	/* Button's GPE is run-wake GPE */
4be44fcd LB	379	acpi_set_gpe_type(device->wakeup.gpe_device,
	380	device->wakeup.gpe_number,
	381	ACPI_GPE_TYPE_WAKE_RUN);
	382	acpi_enable_gpe(device->wakeup.gpe_device,
	383	device->wakeup.gpe_number, ACPI_NOT_ISR);
1da177e4 LT	384	device->wakeup.state.enabled = 1;
	385	}
	386
4be44fcd LB	387	printk(KERN_INFO PREFIX "%s [%s]\n",
4be44fcd LB	388	acpi_device_name(device), acpi_device_bid(device));
1da177e4	389
4be44fcd	390	end:
1da177e4	391	if (result) {
b34a8030	392	acpi_button_remove_fs(device);
1da177e4 LT	393	kfree(button);
	394	}
	395
d550d98d	396	return result;
1da177e4 LT	397	}
1da177e4 LT	398
4be44fcd	399	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	400	{
4be44fcd LB	401	acpi_status status = 0;
4be44fcd LB	402	struct acpi_button *button = NULL;
1da177e4	403
1da177e4 LT	404
1da177e4 LT	405	if (!device \|\| !acpi_driver_data(device))
d550d98d	406	return -EINVAL;
1da177e4 LT	407
	408	button = acpi_driver_data(device);
	409
	410	/* Unregister for device notifications. */
	411	switch (button->type) {
	412	case ACPI_BUTTON_TYPE_POWERF:
4be44fcd LB	413	status =
	414	acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
	415	acpi_button_notify_fixed);
1da177e4 LT	416	break;
1da177e4 LT	417	case ACPI_BUTTON_TYPE_SLEEPF:
4be44fcd LB	418	status =
	419	acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
	420	acpi_button_notify_fixed);
1da177e4 LT	421	break;
	422	default:
	423	status = acpi_remove_notify_handler(button->handle,
4be44fcd LB	424	ACPI_DEVICE_NOTIFY,
4be44fcd LB	425	acpi_button_notify);
1da177e4 LT	426	break;
	427	}
	428
4be44fcd	429	acpi_button_remove_fs(device);
b34a8030	430
1da177e4 LT	431	kfree(button);
1da177e4 LT	432
d550d98d	433	return 0;
1da177e4 LT	434	}
1da177e4 LT	435
4be44fcd	436	static int __init acpi_button_init(void)
1da177e4	437	{
4be44fcd	438	int result = 0;
1da177e4	439
1da177e4	440
b34a8030 AS	441	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030 AS	442	if (!acpi_button_dir)
d550d98d	443	return -ENODEV;
b34a8030	444	acpi_button_dir->owner = THIS_MODULE;
1da177e4 LT	445	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	446	if (result < 0) {
b34a8030	447	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
d550d98d	448	return -ENODEV;
1da177e4 LT	449	}
1da177e4 LT	450
d550d98d	451	return 0;
1da177e4 LT	452	}
1da177e4 LT	453
4be44fcd	454	static void __exit acpi_button_exit(void)
1da177e4	455	{
1da177e4 LT	456
	457	acpi_bus_unregister_driver(&acpi_button_driver);
	458
4be44fcd	459	if (acpi_power_dir)
b34a8030 AS	460	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	461	if (acpi_sleep_dir)
	462	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	463	if (acpi_lid_dir)
	464	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	465	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
	466
d550d98d	467	return;
1da177e4 LT	468	}
1da177e4 LT	469
1da177e4 LT	470	module_init(acpi_button_init);
1da177e4 LT	471	module_exit(acpi_button_exit);