[GitHub/mt8127/android_kernel_alcatel_ttab.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 {
	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->device->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->device->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;
	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(device->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(device->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	struct acpi_device device; / Fixed button kludge */
	86	u8 type;
	87	unsigned long pushed;
1da177e4 LT	88	};
1da177e4 LT	89
b34a8030	90	static struct file_operations acpi_button_info_fops = {
4be44fcd LB	91	.open = acpi_button_info_open_fs,
	92	.read = seq_read,
	93	.llseek = seq_lseek,
	94	.release = single_release,
b34a8030 AS	95	};
	96
	97	static struct file_operations acpi_button_state_fops = {
4be44fcd LB	98	.open = acpi_button_state_open_fs,
	99	.read = seq_read,
	100	.llseek = seq_lseek,
	101	.release = single_release,
b34a8030	102	};
4be44fcd	103
b34a8030 AS	104	/* --------------------------------------------------------------------------
	105	FS Interface (/proc)
	106	-------------------------------------------------------------------------- */
	107
4be44fcd	108	static struct proc_dir_entry *acpi_button_dir;
b34a8030 AS	109
	110	static int acpi_button_info_seq_show(struct seq_file seq, void offset)
	111	{
4be44fcd	112	struct acpi_button button = (struct acpi_button )seq->private;
b34a8030	113
b34a8030 AS	114
b34a8030 AS	115	if (!button \|\| !button->device)
d550d98d	116	return 0;
b34a8030	117
4be44fcd LB	118	seq_printf(seq, "type: %s\n",
4be44fcd LB	119	acpi_device_name(button->device));
b34a8030	120
d550d98d	121	return 0;
b34a8030 AS	122	}
	123
	124	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	125	{
	126	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	127	}
4be44fcd	128
b34a8030 AS	129	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	130	{
4be44fcd LB	131	struct acpi_button button = (struct acpi_button )seq->private;
	132	acpi_status status;
	133	unsigned long state;
b34a8030	134
b34a8030 AS	135
b34a8030 AS	136	if (!button \|\| !button->device)
d550d98d	137	return 0;
b34a8030	138
27b1d3e8	139	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
b34a8030 AS	140	if (ACPI_FAILURE(status)) {
b34a8030 AS	141	seq_printf(seq, "state: unsupported\n");
4be44fcd LB	142	} else {
	143	seq_printf(seq, "state: %s\n",
	144	(state ? "open" : "closed"));
b34a8030 AS	145	}
b34a8030 AS	146
d550d98d	147	return 0;
b34a8030 AS	148	}
	149
	150	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	151	{
	152	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	153	}
	154
	155	static struct proc_dir_entry *acpi_power_dir;
	156	static struct proc_dir_entry *acpi_sleep_dir;
	157	static struct proc_dir_entry *acpi_lid_dir;
	158
4be44fcd	159	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	160	{
4be44fcd LB	161	struct proc_dir_entry *entry = NULL;
4be44fcd LB	162	struct acpi_button *button = NULL;
b34a8030	163
b34a8030 AS	164
b34a8030 AS	165	if (!device \|\| !acpi_driver_data(device))
d550d98d	166	return -EINVAL;
b34a8030 AS	167
	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	entry->owner = THIS_MODULE;
	196
	197	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	198	if (!acpi_device_dir(device))
d550d98d	199	return -ENODEV;
b34a8030 AS	200	acpi_device_dir(device)->owner = THIS_MODULE;
	201
	202	/* 'info' [R] */
	203	entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	204	S_IRUGO, acpi_device_dir(device));
b34a8030	205	if (!entry)
d550d98d	206	return -ENODEV;
b34a8030 AS	207	else {
	208	entry->proc_fops = &acpi_button_info_fops;
	209	entry->data = acpi_driver_data(device);
	210	entry->owner = THIS_MODULE;
	211	}
	212
	213	/* show lid state [R] */
	214	if (button->type == ACPI_BUTTON_TYPE_LID) {
	215	entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	216	S_IRUGO, acpi_device_dir(device));
b34a8030	217	if (!entry)
a6fc6720	218	return -ENODEV;
b34a8030 AS	219	else {
	220	entry->proc_fops = &acpi_button_state_fops;
	221	entry->data = acpi_driver_data(device);
	222	entry->owner = THIS_MODULE;
	223	}
	224	}
	225
d550d98d	226	return 0;
b34a8030 AS	227	}
b34a8030 AS	228
4be44fcd	229	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	230	{
4be44fcd	231	struct acpi_button *button = NULL;
b34a8030	232
b34a8030 AS	233
	234	button = acpi_driver_data(device);
	235	if (acpi_device_dir(device)) {
	236	if (button->type == ACPI_BUTTON_TYPE_LID)
	237	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	238	acpi_device_dir(device));
b34a8030	239	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	240	acpi_device_dir(device));
b34a8030 AS	241
b34a8030 AS	242	remove_proc_entry(acpi_device_bid(device),
4be44fcd	243	acpi_device_dir(device)->parent);
b34a8030 AS	244	acpi_device_dir(device) = NULL;
	245	}
	246
d550d98d	247	return 0;
b34a8030 AS	248	}
b34a8030 AS	249
1da177e4 LT	250	/* --------------------------------------------------------------------------
	251	Driver Interface
	252	-------------------------------------------------------------------------- */
	253
4be44fcd	254	static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
1da177e4	255	{
4be44fcd	256	struct acpi_button button = (struct acpi_button )data;
1da177e4	257
1da177e4 LT	258
1da177e4 LT	259	if (!button \|\| !button->device)
d550d98d	260	return;
1da177e4 LT	261
	262	switch (event) {
	263	case ACPI_BUTTON_NOTIFY_STATUS:
4be44fcd LB	264	acpi_bus_generate_event(button->device, event,
4be44fcd LB	265	++button->pushed);
1da177e4 LT	266	break;
	267	default:
	268	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	269	"Unsupported event [0x%x]\n", event));
1da177e4 LT	270	break;
	271	}
	272
d550d98d	273	return;
1da177e4 LT	274	}
1da177e4 LT	275
4be44fcd	276	static acpi_status acpi_button_notify_fixed(void *data)
1da177e4	277	{
4be44fcd LB	278	struct acpi_button button = (struct acpi_button )data;
4be44fcd LB	279
1da177e4	280
b34a8030	281	if (!button)
d550d98d	282	return AE_BAD_PARAMETER;
1da177e4	283
27b1d3e8	284	acpi_button_notify(button->device->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
1da177e4	285
d550d98d	286	return AE_OK;
1da177e4 LT	287	}
1da177e4 LT	288
4be44fcd	289	static int acpi_button_add(struct acpi_device *device)
1da177e4	290	{
4be44fcd LB	291	int result = 0;
	292	acpi_status status = AE_OK;
	293	struct acpi_button *button = NULL;
1da177e4	294
1da177e4 LT	295
1da177e4 LT	296	if (!device)
d550d98d	297	return -EINVAL;
1da177e4 LT	298
	299	button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
	300	if (!button)
d550d98d	301	return -ENOMEM;
1da177e4 LT	302	memset(button, 0, sizeof(struct acpi_button));
	303
	304	button->device = device;
1da177e4 LT	305	acpi_driver_data(device) = button;
	306
	307	/*
	308	* Determine the button type (via hid), as fixed-feature buttons
	309	* need to be handled a bit differently than generic-space.
	310	*/
	311	if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
	312	button->type = ACPI_BUTTON_TYPE_POWER;
4be44fcd LB	313	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
4be44fcd LB	314	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	315	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	316	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
1da177e4 LT	317	button->type = ACPI_BUTTON_TYPE_POWERF;
1da177e4 LT	318	strcpy(acpi_device_name(device),
4be44fcd LB	319	ACPI_BUTTON_DEVICE_NAME_POWERF);
4be44fcd LB	320	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	321	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	322	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
1da177e4	323	button->type = ACPI_BUTTON_TYPE_SLEEP;
4be44fcd LB	324	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
4be44fcd LB	325	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	326	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	327	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
1da177e4 LT	328	button->type = ACPI_BUTTON_TYPE_SLEEPF;
1da177e4 LT	329	strcpy(acpi_device_name(device),
4be44fcd LB	330	ACPI_BUTTON_DEVICE_NAME_SLEEPF);
4be44fcd LB	331	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	332	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	333	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
1da177e4	334	button->type = ACPI_BUTTON_TYPE_LID;
4be44fcd LB	335	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
4be44fcd LB	336	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	337	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	338	} else {
6468463a LB	339	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
6468463a LB	340	acpi_device_hid(device));
1da177e4 LT	341	result = -ENODEV;
	342	goto end;
	343	}
	344
b34a8030 AS	345	result = acpi_button_add_fs(device);
	346	if (result)
	347	goto end;
	348
1da177e4 LT	349	switch (button->type) {
1da177e4 LT	350	case ACPI_BUTTON_TYPE_POWERF:
4be44fcd LB	351	status =
	352	acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
	353	acpi_button_notify_fixed,
	354	button);
1da177e4 LT	355	break;
1da177e4 LT	356	case ACPI_BUTTON_TYPE_SLEEPF:
4be44fcd LB	357	status =
	358	acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
	359	acpi_button_notify_fixed,
	360	button);
1da177e4 LT	361	break;
1da177e4 LT	362	default:
27b1d3e8	363	status = acpi_install_notify_handler(device->handle,
4be44fcd LB	364	ACPI_DEVICE_NOTIFY,
	365	acpi_button_notify,
	366	button);
1da177e4 LT	367	break;
	368	}
	369
	370	if (ACPI_FAILURE(status)) {
1da177e4 LT	371	result = -ENODEV;
	372	goto end;
	373	}
	374
	375	if (device->wakeup.flags.valid) {
	376	/* Button's GPE is run-wake GPE */
4be44fcd LB	377	acpi_set_gpe_type(device->wakeup.gpe_device,
	378	device->wakeup.gpe_number,
	379	ACPI_GPE_TYPE_WAKE_RUN);
	380	acpi_enable_gpe(device->wakeup.gpe_device,
	381	device->wakeup.gpe_number, ACPI_NOT_ISR);
1da177e4 LT	382	device->wakeup.state.enabled = 1;
	383	}
	384
4be44fcd LB	385	printk(KERN_INFO PREFIX "%s [%s]\n",
4be44fcd LB	386	acpi_device_name(device), acpi_device_bid(device));
1da177e4	387
4be44fcd	388	end:
1da177e4	389	if (result) {
b34a8030	390	acpi_button_remove_fs(device);
1da177e4 LT	391	kfree(button);
	392	}
	393
d550d98d	394	return result;
1da177e4 LT	395	}
1da177e4 LT	396
4be44fcd	397	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	398	{
4be44fcd LB	399	acpi_status status = 0;
4be44fcd LB	400	struct acpi_button *button = NULL;
1da177e4	401
1da177e4 LT	402
1da177e4 LT	403	if (!device \|\| !acpi_driver_data(device))
d550d98d	404	return -EINVAL;
1da177e4 LT	405
	406	button = acpi_driver_data(device);
	407
	408	/* Unregister for device notifications. */
	409	switch (button->type) {
	410	case ACPI_BUTTON_TYPE_POWERF:
4be44fcd LB	411	status =
	412	acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
	413	acpi_button_notify_fixed);
1da177e4 LT	414	break;
1da177e4 LT	415	case ACPI_BUTTON_TYPE_SLEEPF:
4be44fcd LB	416	status =
	417	acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
	418	acpi_button_notify_fixed);
1da177e4 LT	419	break;
1da177e4 LT	420	default:
27b1d3e8	421	status = acpi_remove_notify_handler(device->handle,
4be44fcd LB	422	ACPI_DEVICE_NOTIFY,
4be44fcd LB	423	acpi_button_notify);
1da177e4 LT	424	break;
	425	}
	426
4be44fcd	427	acpi_button_remove_fs(device);
b34a8030	428
1da177e4 LT	429	kfree(button);
1da177e4 LT	430
d550d98d	431	return 0;
1da177e4 LT	432	}
1da177e4 LT	433
4be44fcd	434	static int __init acpi_button_init(void)
1da177e4	435	{
4be44fcd	436	int result = 0;
1da177e4	437
1da177e4	438
b34a8030 AS	439	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030 AS	440	if (!acpi_button_dir)
d550d98d	441	return -ENODEV;
b34a8030	442	acpi_button_dir->owner = THIS_MODULE;
1da177e4 LT	443	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	444	if (result < 0) {
b34a8030	445	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
d550d98d	446	return -ENODEV;
1da177e4 LT	447	}
1da177e4 LT	448
d550d98d	449	return 0;
1da177e4 LT	450	}
1da177e4 LT	451
4be44fcd	452	static void __exit acpi_button_exit(void)
1da177e4	453	{
1da177e4 LT	454
	455	acpi_bus_unregister_driver(&acpi_button_driver);
	456
4be44fcd	457	if (acpi_power_dir)
b34a8030 AS	458	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	459	if (acpi_sleep_dir)
	460	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	461	if (acpi_lid_dir)
	462	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	463	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
	464
d550d98d	465	return;
1da177e4 LT	466	}
1da177e4 LT	467
1da177e4 LT	468	module_init(acpi_button_init);
1da177e4 LT	469	module_exit(acpi_button_exit);