[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;

	ACPI_FUNCTION_TRACE("acpi_button_info_seq_show");

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

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

	return_VALUE(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;

	ACPI_FUNCTION_TRACE("acpi_button_state_seq_show");

	if (!button || !button->device)
		return_VALUE(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_VALUE(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;

	ACPI_FUNCTION_TRACE("acpi_button_add_fs");

	if (!device || !acpi_driver_data(device))
		return_VALUE(-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_VALUE(-ENODEV);
	entry->owner = THIS_MODULE;

	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	if (!acpi_device_dir(device))
		return_VALUE(-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)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
			"Unable to create '%s' fs entry\n",
			ACPI_BUTTON_FILE_INFO));
	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)
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				"Unable to create '%s' fs entry\n",
				ACPI_BUTTON_FILE_INFO));
		else {
			entry->proc_fops = &acpi_button_state_fops;
			entry->data = acpi_driver_data(device);
			entry->owner = THIS_MODULE;
		}
	}

	return_VALUE(0);
}


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

	ACPI_FUNCTION_TRACE("acpi_button_remove_fs");

	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_VALUE(0);
}


/* --------------------------------------------------------------------------
                                Driver Interface
   -------------------------------------------------------------------------- */

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

	ACPI_FUNCTION_TRACE("acpi_button_notify");

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

	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_VOID;
}


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

	if (!button)
		return_ACPI_STATUS(AE_BAD_PARAMETER);

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

	return_ACPI_STATUS(AE_OK);
}


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

	ACPI_FUNCTION_TRACE("acpi_button_add");

	if (!device)
		return_VALUE(-EINVAL);

	button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
	if (!button)
		return_VALUE(-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 {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "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)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
			"Error installing notify handler\n"));
		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_VALUE(result);
}


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

	ACPI_FUNCTION_TRACE("acpi_button_remove");

	if (!device || !acpi_driver_data(device))
		return_VALUE(-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;
	}

	if (ACPI_FAILURE(status))
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
			"Error removing notify handler\n"));

	acpi_button_remove_fs(device);	

	kfree(button);

	return_VALUE(0);
}


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

	ACPI_FUNCTION_TRACE("acpi_button_init");

	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	if (!acpi_button_dir)
		return_VALUE(-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_VALUE(-ENODEV);
	}

	return_VALUE(0);
}


static void __exit
acpi_button_exit (void)
{
	ACPI_FUNCTION_TRACE("acpi_button_exit");

	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_VOID;
}


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
	35
	36	#define ACPI_BUTTON_COMPONENT 0x00080000
	37	#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
	38	#define ACPI_BUTTON_CLASS "button"
b34a8030 AS	39	#define ACPI_BUTTON_FILE_INFO "info"
	40	#define ACPI_BUTTON_FILE_STATE "state"
	41	#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
1da177e4 LT	42	#define ACPI_BUTTON_NOTIFY_STATUS 0x80
	43
	44	#define ACPI_BUTTON_SUBCLASS_POWER "power"
	45	#define ACPI_BUTTON_HID_POWER "PNP0C0C"
	46	#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
	47	#define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
	48	#define ACPI_BUTTON_TYPE_POWER 0x01
	49	#define ACPI_BUTTON_TYPE_POWERF 0x02
	50
	51	#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
	52	#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
	53	#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
	54	#define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
	55	#define ACPI_BUTTON_TYPE_SLEEP 0x03
	56	#define ACPI_BUTTON_TYPE_SLEEPF 0x04
	57
	58	#define ACPI_BUTTON_SUBCLASS_LID "lid"
	59	#define ACPI_BUTTON_HID_LID "PNP0C0D"
	60	#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
	61	#define ACPI_BUTTON_TYPE_LID 0x05
	62
	63	#define _COMPONENT ACPI_BUTTON_COMPONENT
	64	ACPI_MODULE_NAME ("acpi_button")
	65
	66	MODULE_AUTHOR("Paul Diefenbaugh");
	67	MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME);
	68	MODULE_LICENSE("GPL");
	69
	70
	71	static int acpi_button_add (struct acpi_device *device);
	72	static int acpi_button_remove (struct acpi_device *device, int type);
b34a8030 AS	73	static int acpi_button_info_open_fs(struct inode inode, struct file file);
b34a8030 AS	74	static int acpi_button_state_open_fs(struct inode inode, struct file file);
1da177e4 LT	75
	76	static struct acpi_driver acpi_button_driver = {
	77	.name = ACPI_BUTTON_DRIVER_NAME,
	78	.class = ACPI_BUTTON_CLASS,
	79	.ids = "ACPI_FPB,ACPI_FSB,PNP0C0D,PNP0C0C,PNP0C0E",
	80	.ops = {
	81	.add = acpi_button_add,
	82	.remove = acpi_button_remove,
	83	},
	84	};
	85
	86	struct acpi_button {
	87	acpi_handle handle;
	88	struct acpi_device device; / Fixed button kludge */
	89	u8 type;
	90	unsigned long pushed;
	91	};
	92
b34a8030 AS	93	static struct file_operations acpi_button_info_fops = {
	94	.open = acpi_button_info_open_fs,
	95	.read = seq_read,
	96	.llseek = seq_lseek,
	97	.release = single_release,
	98	};
	99
	100	static struct file_operations acpi_button_state_fops = {
	101	.open = acpi_button_state_open_fs,
	102	.read = seq_read,
	103	.llseek = seq_lseek,
	104	.release = single_release,
	105	};
	106	/* --------------------------------------------------------------------------
	107	FS Interface (/proc)
	108	-------------------------------------------------------------------------- */
	109
	110	static struct proc_dir_entry *acpi_button_dir;
	111
	112	static int acpi_button_info_seq_show(struct seq_file seq, void offset)
	113	{
	114	struct acpi_button button = (struct acpi_button ) seq->private;
	115
	116	ACPI_FUNCTION_TRACE("acpi_button_info_seq_show");
	117
	118	if (!button \|\| !button->device)
	119	return_VALUE(0);
	120
	121	seq_printf(seq, "type: %s\n",
	122	acpi_device_name(button->device));
	123
	124	return_VALUE(0);
	125	}
	126
	127	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	128	{
	129	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	130	}
	131
	132	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
	133	{
	134	struct acpi_button button = (struct acpi_button ) seq->private;
	135	acpi_status status;
	136	unsigned long state;
	137
	138	ACPI_FUNCTION_TRACE("acpi_button_state_seq_show");
	139
	140	if (!button \|\| !button->device)
	141	return_VALUE(0);
	142
	143	status = acpi_evaluate_integer(button->handle,"_LID",NULL,&state);
	144	if (ACPI_FAILURE(status)) {
	145	seq_printf(seq, "state: unsupported\n");
	146	}
	147	else{
	148	seq_printf(seq, "state: %s\n", (state ? "open" : "closed"));
	149	}
	150
	151	return_VALUE(0);
	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
163	static int
164	acpi_button_add_fs (
165	struct acpi_device *device)
166	{
167	struct proc_dir_entry *entry = NULL;
168	struct acpi_button *button = NULL;
169
170	ACPI_FUNCTION_TRACE("acpi_button_add_fs");
171
172	if (!device \|\| !acpi_driver_data(device))
173	return_VALUE(-EINVAL);
174
175	button = acpi_driver_data(device);
176
177	switch (button->type) {
178	case ACPI_BUTTON_TYPE_POWER:
179	case ACPI_BUTTON_TYPE_POWERF:
180	if (!acpi_power_dir)
181	acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
182	acpi_button_dir);
183	entry = acpi_power_dir;
184	break;
185	case ACPI_BUTTON_TYPE_SLEEP:
186	case ACPI_BUTTON_TYPE_SLEEPF:
187	if (!acpi_sleep_dir)
188	acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
189	acpi_button_dir);
190	entry = acpi_sleep_dir;
191	break;
192	case ACPI_BUTTON_TYPE_LID:
193	if (!acpi_lid_dir)
194	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
195	acpi_button_dir);
196	entry = acpi_lid_dir;
197	break;
198	}
199
200	if (!entry)
201	return_VALUE(-ENODEV);
202	entry->owner = THIS_MODULE;
203
204	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
205	if (!acpi_device_dir(device))
206	return_VALUE(-ENODEV);
207	acpi_device_dir(device)->owner = THIS_MODULE;
208
209	/* 'info' [R] */
210	entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
211	S_IRUGO, acpi_device_dir(device));
212	if (!entry)
213	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
214	"Unable to create '%s' fs entry\n",
215	ACPI_BUTTON_FILE_INFO));
216	else {
217	entry->proc_fops = &acpi_button_info_fops;
218	entry->data = acpi_driver_data(device);
219	entry->owner = THIS_MODULE;
220	}
221
222	/* show lid state [R] */
223	if (button->type == ACPI_BUTTON_TYPE_LID) {
224	entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
225	S_IRUGO, acpi_device_dir(device));
226	if (!entry)
227	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
228	"Unable to create '%s' fs entry\n",
229	ACPI_BUTTON_FILE_INFO));
230	else {
231	entry->proc_fops = &acpi_button_state_fops;
232	entry->data = acpi_driver_data(device);
233	entry->owner = THIS_MODULE;
234	}
235	}
236
237	return_VALUE(0);
238	}
239
240
241	static int
242	acpi_button_remove_fs (
243	struct acpi_device *device)
244	{
245	struct acpi_button *button = NULL;
246
247	ACPI_FUNCTION_TRACE("acpi_button_remove_fs");
248
249	button = acpi_driver_data(device);
250	if (acpi_device_dir(device)) {
251	if (button->type == ACPI_BUTTON_TYPE_LID)
252	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
253	acpi_device_dir(device));
254	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
255	acpi_device_dir(device));
256
257	remove_proc_entry(acpi_device_bid(device),
258	acpi_device_dir(device)->parent);
259	acpi_device_dir(device) = NULL;
260	}
261
262	return_VALUE(0);
263	}
264
265
1da177e4 LT	266	/* --------------------------------------------------------------------------
	267	Driver Interface
	268	-------------------------------------------------------------------------- */
	269
	270	static void
	271	acpi_button_notify (
	272	acpi_handle handle,
	273	u32 event,
	274	void *data)
	275	{
	276	struct acpi_button button = (struct acpi_button ) data;
	277
	278	ACPI_FUNCTION_TRACE("acpi_button_notify");
	279
	280	if (!button \|\| !button->device)
	281	return_VOID;
	282
	283	switch (event) {
	284	case ACPI_BUTTON_NOTIFY_STATUS:
	285	acpi_bus_generate_event(button->device, event, ++button->pushed);
	286	break;
	287	default:
	288	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	289	"Unsupported event [0x%x]\n", event));
	290	break;
	291	}
	292
	293	return_VOID;
	294	}
	295
	296
	297	static acpi_status
	298	acpi_button_notify_fixed (
	299	void *data)
	300	{
	301	struct acpi_button button = (struct acpi_button ) data;
	302
	303	ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");
	304
b34a8030 AS	305	if (!button)
b34a8030 AS	306	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	307
	308	acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
	309
	310	return_ACPI_STATUS(AE_OK);
	311	}
	312
	313
	314	static int
	315	acpi_button_add (
	316	struct acpi_device *device)
	317	{
	318	int result = 0;
	319	acpi_status status = AE_OK;
	320	struct acpi_button *button = NULL;
	321
1da177e4 LT	322	ACPI_FUNCTION_TRACE("acpi_button_add");
	323
	324	if (!device)
	325	return_VALUE(-EINVAL);
	326
	327	button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
	328	if (!button)
	329	return_VALUE(-ENOMEM);
	330	memset(button, 0, sizeof(struct acpi_button));
	331
	332	button->device = device;
	333	button->handle = device->handle;
	334	acpi_driver_data(device) = button;
	335
	336	/*
	337	* Determine the button type (via hid), as fixed-feature buttons
	338	* need to be handled a bit differently than generic-space.
	339	*/
	340	if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
	341	button->type = ACPI_BUTTON_TYPE_POWER;
	342	strcpy(acpi_device_name(device),
	343	ACPI_BUTTON_DEVICE_NAME_POWER);
	344	sprintf(acpi_device_class(device), "%s/%s",
	345	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
	346	}
	347	else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
	348	button->type = ACPI_BUTTON_TYPE_POWERF;
	349	strcpy(acpi_device_name(device),
	350	ACPI_BUTTON_DEVICE_NAME_POWERF);
	351	sprintf(acpi_device_class(device), "%s/%s",
	352	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
	353	}
	354	else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
	355	button->type = ACPI_BUTTON_TYPE_SLEEP;
	356	strcpy(acpi_device_name(device),
	357	ACPI_BUTTON_DEVICE_NAME_SLEEP);
	358	sprintf(acpi_device_class(device), "%s/%s",
	359	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
	360	}
	361	else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
	362	button->type = ACPI_BUTTON_TYPE_SLEEPF;
	363	strcpy(acpi_device_name(device),
	364	ACPI_BUTTON_DEVICE_NAME_SLEEPF);
	365	sprintf(acpi_device_class(device), "%s/%s",
	366	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
	367	}
	368	else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
	369	button->type = ACPI_BUTTON_TYPE_LID;
	370	strcpy(acpi_device_name(device),
	371	ACPI_BUTTON_DEVICE_NAME_LID);
	372	sprintf(acpi_device_class(device), "%s/%s",
	373	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
	374	}
	375	else {
	376	ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unsupported hid [%s]\n",
	377	acpi_device_hid(device)));
	378	result = -ENODEV;
	379	goto end;
	380	}
	381
b34a8030 AS	382	result = acpi_button_add_fs(device);
	383	if (result)
	384	goto end;
	385
1da177e4 LT	386	switch (button->type) {
	387	case ACPI_BUTTON_TYPE_POWERF:
	388	status = acpi_install_fixed_event_handler (
	389	ACPI_EVENT_POWER_BUTTON,
	390	acpi_button_notify_fixed,
	391	button);
	392	break;
	393	case ACPI_BUTTON_TYPE_SLEEPF:
	394	status = acpi_install_fixed_event_handler (
	395	ACPI_EVENT_SLEEP_BUTTON,
	396	acpi_button_notify_fixed,
	397	button);
	398	break;
	399	default:
	400	status = acpi_install_notify_handler (
	401	button->handle,
	402	ACPI_DEVICE_NOTIFY,
	403	acpi_button_notify,
	404	button);
	405	break;
	406	}
	407
	408	if (ACPI_FAILURE(status)) {
	409	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	410	"Error installing notify handler\n"));
	411	result = -ENODEV;
	412	goto end;
	413	}
	414
	415	if (device->wakeup.flags.valid) {
	416	/* Button's GPE is run-wake GPE */
	417	acpi_set_gpe_type(device->wakeup.gpe_device,
	418	device->wakeup.gpe_number, ACPI_GPE_TYPE_WAKE_RUN);
	419	acpi_enable_gpe(device->wakeup.gpe_device,
	420	device->wakeup.gpe_number, ACPI_NOT_ISR);
	421	device->wakeup.state.enabled = 1;
	422	}
	423
	424	printk(KERN_INFO PREFIX "%s [%s]\n",
	425	acpi_device_name(device), acpi_device_bid(device));
	426
	427	end:
	428	if (result) {
b34a8030	429	acpi_button_remove_fs(device);
1da177e4 LT	430	kfree(button);
	431	}
	432
	433	return_VALUE(result);
	434	}
	435
	436
	437	static int
	438	acpi_button_remove (struct acpi_device *device, int type)
	439	{
	440	acpi_status status = 0;
	441	struct acpi_button *button = NULL;
	442
	443	ACPI_FUNCTION_TRACE("acpi_button_remove");
	444
	445	if (!device \|\| !acpi_driver_data(device))
	446	return_VALUE(-EINVAL);
	447
	448	button = acpi_driver_data(device);
	449
	450	/* Unregister for device notifications. */
	451	switch (button->type) {
	452	case ACPI_BUTTON_TYPE_POWERF:
	453	status = acpi_remove_fixed_event_handler(
	454	ACPI_EVENT_POWER_BUTTON, acpi_button_notify_fixed);
	455	break;
	456	case ACPI_BUTTON_TYPE_SLEEPF:
	457	status = acpi_remove_fixed_event_handler(
	458	ACPI_EVENT_SLEEP_BUTTON, acpi_button_notify_fixed);
	459	break;
	460	default:
	461	status = acpi_remove_notify_handler(button->handle,
	462	ACPI_DEVICE_NOTIFY, acpi_button_notify);
	463	break;
	464	}
	465
	466	if (ACPI_FAILURE(status))
	467	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	468	"Error removing notify handler\n"));
	469
b34a8030 AS	470	acpi_button_remove_fs(device);
b34a8030 AS	471
1da177e4 LT	472	kfree(button);
	473
	474	return_VALUE(0);
	475	}
	476
	477
	478	static int __init
	479	acpi_button_init (void)
	480	{
	481	int result = 0;
	482
	483	ACPI_FUNCTION_TRACE("acpi_button_init");
	484
b34a8030 AS	485	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
	486	if (!acpi_button_dir)
	487	return_VALUE(-ENODEV);
	488	acpi_button_dir->owner = THIS_MODULE;
1da177e4 LT	489	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	490	if (result < 0) {
b34a8030	491	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
1da177e4 LT	492	return_VALUE(-ENODEV);
	493	}
	494
	495	return_VALUE(0);
	496	}
	497
b34a8030	498
1da177e4 LT	499	static void __exit
	500	acpi_button_exit (void)
	501	{
	502	ACPI_FUNCTION_TRACE("acpi_button_exit");
	503
	504	acpi_bus_unregister_driver(&acpi_button_driver);
	505
b34a8030 AS	506	if (acpi_power_dir)
	507	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	508	if (acpi_sleep_dir)
	509	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	510	if (acpi_lid_dir)
	511	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	512	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
	513
1da177e4 LT	514	return_VOID;
	515	}
	516
b34a8030	517
1da177e4 LT	518	module_init(acpi_button_init);
1da177e4 LT	519	module_exit(acpi_button_exit);