[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 <linux/input.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define ACPI_BUTTON_COMPONENT		0x00080000
#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_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,
		.remove = acpi_button_remove,
	},
};

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 = {
	.open = acpi_button_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static const 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 = 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 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;
	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 = 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 = data;
	struct input_dev *input;

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

	switch (event) {
	case ACPI_BUTTON_NOTIFY_STATUS:
		input = button->input;

		if (button->type == ACPI_BUTTON_TYPE_LID) {
			struct acpi_handle *handle = button->device->handle;
			unsigned long state;

			if (!ACPI_FAILURE(acpi_evaluate_integer(handle, "_LID",
								NULL, &state)))
				input_report_switch(input, SW_LID, !state);

		} 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;
	}

	return;
}

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

	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->device->handle,
						     ACPI_DEVICE_NOTIFY,
						     acpi_button_notify,
						     button);
		break;
	}

	return ACPI_FAILURE(status) ? -ENODEV : 0;
}

static void acpi_button_remove_notify_handlers(struct acpi_button *button)
{
	switch (button->type) {
	case ACPI_BUTTON_TYPE_POWERF:
		acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
						acpi_button_notify_fixed);
		break;
	case ACPI_BUTTON_TYPE_SLEEPF:
		acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
						acpi_button_notify_fixed);
		break;
	default:
		acpi_remove_notify_handler(button->device->handle,
					   ACPI_DEVICE_NOTIFY,
					   acpi_button_notify);
		break;
	}
}

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;
	acpi_driver_data(device) = 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;

	error = acpi_button_install_notify_handlers(button);
	if (error)
		goto err_remove_fs;

	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;

	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_handlers;

	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));

	return 0;

 err_remove_handlers:
	acpi_button_remove_notify_handlers(button);
 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_notify_handlers(button);
	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;
	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);
}

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>
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_COMPONENT 0x00080000
1da177e4	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
f52fd66d	63	ACPI_MODULE_NAME("button");
1da177e4	64
c0968f0e	65	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	66	MODULE_DESCRIPTION("ACPI Button Driver");
1da177e4 LT	67	MODULE_LICENSE("GPL");
1da177e4 LT	68
1ba90e3a TR	69	static const struct acpi_device_id button_device_ids[] = {
	70	{ACPI_BUTTON_HID_LID, 0},
	71	{ACPI_BUTTON_HID_SLEEP, 0},
	72	{ACPI_BUTTON_HID_SLEEPF, 0},
	73	{ACPI_BUTTON_HID_POWER, 0},
	74	{ACPI_BUTTON_HID_POWERF, 0},
	75	{"", 0},
	76	};
	77	MODULE_DEVICE_TABLE(acpi, button_device_ids);
	78
4be44fcd LB	79	static int acpi_button_add(struct acpi_device *device);
4be44fcd LB	80	static int acpi_button_remove(struct acpi_device *device, int type);
b34a8030 AS	81	static int acpi_button_info_open_fs(struct inode inode, struct file file);
b34a8030 AS	82	static int acpi_button_state_open_fs(struct inode inode, struct file file);
1da177e4 LT	83
1da177e4 LT	84	static struct acpi_driver acpi_button_driver = {
c2b6705b	85	.name = "button",
4be44fcd	86	.class = ACPI_BUTTON_CLASS,
1ba90e3a	87	.ids = button_device_ids,
4be44fcd LB	88	.ops = {
	89	.add = acpi_button_add,
	90	.remove = acpi_button_remove,
c0968f0e	91	},
1da177e4 LT	92	};
	93
	94	struct acpi_button {
4be44fcd	95	struct acpi_device device; / Fixed button kludge */
c0968f0e DT	96	unsigned int type;
	97	struct input_dev *input;
	98	char phys[32]; /* for input device */
4be44fcd	99	unsigned long pushed;
1da177e4 LT	100	};
1da177e4 LT	101
d7508032	102	static const struct file_operations acpi_button_info_fops = {
4be44fcd LB	103	.open = acpi_button_info_open_fs,
	104	.read = seq_read,
	105	.llseek = seq_lseek,
	106	.release = single_release,
b34a8030 AS	107	};
b34a8030 AS	108
d7508032	109	static const struct file_operations acpi_button_state_fops = {
4be44fcd LB	110	.open = acpi_button_state_open_fs,
	111	.read = seq_read,
	112	.llseek = seq_lseek,
	113	.release = single_release,
b34a8030	114	};
4be44fcd	115
b34a8030 AS	116	/* --------------------------------------------------------------------------
	117	FS Interface (/proc)
	118	-------------------------------------------------------------------------- */
	119
4be44fcd	120	static struct proc_dir_entry *acpi_button_dir;
b34a8030 AS	121
	122	static int acpi_button_info_seq_show(struct seq_file seq, void offset)
	123	{
c0968f0e	124	struct acpi_button *button = seq->private;
b34a8030 AS	125
b34a8030 AS	126	if (!button \|\| !button->device)
d550d98d	127	return 0;
b34a8030	128
4be44fcd LB	129	seq_printf(seq, "type: %s\n",
4be44fcd LB	130	acpi_device_name(button->device));
b34a8030	131
d550d98d	132	return 0;
b34a8030 AS	133	}
	134
	135	static int acpi_button_info_open_fs(struct inode inode, struct file file)
	136	{
	137	return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
	138	}
4be44fcd	139
b34a8030 AS	140	static int acpi_button_state_seq_show(struct seq_file seq, void offset)
b34a8030 AS	141	{
c0968f0e	142	struct acpi_button *button = seq->private;
4be44fcd LB	143	acpi_status status;
4be44fcd LB	144	unsigned long state;
b34a8030	145
b34a8030	146	if (!button \|\| !button->device)
d550d98d	147	return 0;
b34a8030	148
27b1d3e8	149	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
c0968f0e DT	150	seq_printf(seq, "state: %s\n",
	151	ACPI_FAILURE(status) ? "unsupported" :
	152	(state ? "open" : "closed"));
d550d98d	153	return 0;
b34a8030 AS	154	}
	155
	156	static int acpi_button_state_open_fs(struct inode inode, struct file file)
	157	{
	158	return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
	159	}
	160
	161	static struct proc_dir_entry *acpi_power_dir;
	162	static struct proc_dir_entry *acpi_sleep_dir;
	163	static struct proc_dir_entry *acpi_lid_dir;
	164
4be44fcd	165	static int acpi_button_add_fs(struct acpi_device *device)
b34a8030	166	{
4be44fcd	167	struct proc_dir_entry *entry = NULL;
c0968f0e	168	struct acpi_button *button;
b34a8030 AS	169
b34a8030 AS	170	if (!device \|\| !acpi_driver_data(device))
d550d98d	171	return -EINVAL;
b34a8030 AS	172
	173	button = acpi_driver_data(device);
	174
	175	switch (button->type) {
	176	case ACPI_BUTTON_TYPE_POWER:
	177	case ACPI_BUTTON_TYPE_POWERF:
	178	if (!acpi_power_dir)
4be44fcd LB	179	acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
4be44fcd LB	180	acpi_button_dir);
b34a8030 AS	181	entry = acpi_power_dir;
	182	break;
	183	case ACPI_BUTTON_TYPE_SLEEP:
	184	case ACPI_BUTTON_TYPE_SLEEPF:
	185	if (!acpi_sleep_dir)
4be44fcd LB	186	acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
4be44fcd LB	187	acpi_button_dir);
b34a8030 AS	188	entry = acpi_sleep_dir;
	189	break;
	190	case ACPI_BUTTON_TYPE_LID:
	191	if (!acpi_lid_dir)
4be44fcd LB	192	acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
4be44fcd LB	193	acpi_button_dir);
b34a8030 AS	194	entry = acpi_lid_dir;
	195	break;
	196	}
	197
	198	if (!entry)
d550d98d	199	return -ENODEV;
b34a8030 AS	200	entry->owner = THIS_MODULE;
	201
	202	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
	203	if (!acpi_device_dir(device))
d550d98d	204	return -ENODEV;
b34a8030 AS	205	acpi_device_dir(device)->owner = THIS_MODULE;
	206
	207	/* 'info' [R] */
	208	entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	209	S_IRUGO, acpi_device_dir(device));
b34a8030	210	if (!entry)
d550d98d	211	return -ENODEV;
b34a8030 AS	212	else {
	213	entry->proc_fops = &acpi_button_info_fops;
	214	entry->data = acpi_driver_data(device);
	215	entry->owner = THIS_MODULE;
	216	}
	217
	218	/* show lid state [R] */
	219	if (button->type == ACPI_BUTTON_TYPE_LID) {
	220	entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	221	S_IRUGO, acpi_device_dir(device));
b34a8030	222	if (!entry)
a6fc6720	223	return -ENODEV;
b34a8030 AS	224	else {
	225	entry->proc_fops = &acpi_button_state_fops;
	226	entry->data = acpi_driver_data(device);
	227	entry->owner = THIS_MODULE;
	228	}
	229	}
	230
d550d98d	231	return 0;
b34a8030 AS	232	}
b34a8030 AS	233
4be44fcd	234	static int acpi_button_remove_fs(struct acpi_device *device)
b34a8030	235	{
c0968f0e	236	struct acpi_button *button = acpi_driver_data(device);
b34a8030	237
b34a8030 AS	238	if (acpi_device_dir(device)) {
	239	if (button->type == ACPI_BUTTON_TYPE_LID)
	240	remove_proc_entry(ACPI_BUTTON_FILE_STATE,
4be44fcd	241	acpi_device_dir(device));
b34a8030	242	remove_proc_entry(ACPI_BUTTON_FILE_INFO,
4be44fcd	243	acpi_device_dir(device));
b34a8030 AS	244
b34a8030 AS	245	remove_proc_entry(acpi_device_bid(device),
4be44fcd	246	acpi_device_dir(device)->parent);
b34a8030 AS	247	acpi_device_dir(device) = NULL;
	248	}
	249
d550d98d	250	return 0;
b34a8030 AS	251	}
b34a8030 AS	252
1da177e4 LT	253	/* --------------------------------------------------------------------------
	254	Driver Interface
	255	-------------------------------------------------------------------------- */
	256
4be44fcd	257	static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
1da177e4	258	{
c0968f0e DT	259	struct acpi_button *button = data;
c0968f0e DT	260	struct input_dev *input;
1da177e4 LT	261
1da177e4 LT	262	if (!button \|\| !button->device)
d550d98d	263	return;
1da177e4 LT	264
	265	switch (event) {
	266	case ACPI_BUTTON_NOTIFY_STATUS:
c0968f0e DT	267	input = button->input;
	268
	269	if (button->type == ACPI_BUTTON_TYPE_LID) {
	270	struct acpi_handle *handle = button->device->handle;
	271	unsigned long state;
	272
	273	if (!ACPI_FAILURE(acpi_evaluate_integer(handle, "_LID",
	274	NULL, &state)))
	275	input_report_switch(input, SW_LID, !state);
	276
	277	} else {
	278	int keycode = test_bit(KEY_SLEEP, input->keybit) ?
	279	KEY_SLEEP : KEY_POWER;
	280
	281	input_report_key(input, keycode, 1);
	282	input_sync(input);
	283	input_report_key(input, keycode, 0);
	284	}
	285	input_sync(input);
	286
14e04fb3	287	acpi_bus_generate_proc_event(button->device, event,
4be44fcd	288	++button->pushed);
1da177e4 LT	289	break;
	290	default:
	291	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	292	"Unsupported event [0x%x]\n", event));
1da177e4 LT	293	break;
	294	}
	295
d550d98d	296	return;
1da177e4 LT	297	}
1da177e4 LT	298
4be44fcd	299	static acpi_status acpi_button_notify_fixed(void *data)
1da177e4	300	{
c0968f0e	301	struct acpi_button *button = data;
1da177e4	302
b34a8030	303	if (!button)
d550d98d	304	return AE_BAD_PARAMETER;
1da177e4	305
27b1d3e8	306	acpi_button_notify(button->device->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
1da177e4	307
d550d98d	308	return AE_OK;
1da177e4 LT	309	}
1da177e4 LT	310
c0968f0e	311	static int acpi_button_install_notify_handlers(struct acpi_button *button)
1da177e4	312	{
c0968f0e	313	acpi_status status;
1da177e4	314
c0968f0e DT	315	switch (button->type) {
	316	case ACPI_BUTTON_TYPE_POWERF:
	317	status =
	318	acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
	319	acpi_button_notify_fixed,
	320	button);
	321	break;
	322	case ACPI_BUTTON_TYPE_SLEEPF:
	323	status =
	324	acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
	325	acpi_button_notify_fixed,
	326	button);
	327	break;
	328	default:
	329	status = acpi_install_notify_handler(button->device->handle,
	330	ACPI_DEVICE_NOTIFY,
	331	acpi_button_notify,
	332	button);
	333	break;
	334	}
	335
	336	return ACPI_FAILURE(status) ? -ENODEV : 0;
	337	}
	338
	339	static void acpi_button_remove_notify_handlers(struct acpi_button *button)
	340	{
	341	switch (button->type) {
	342	case ACPI_BUTTON_TYPE_POWERF:
	343	acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
	344	acpi_button_notify_fixed);
	345	break;
	346	case ACPI_BUTTON_TYPE_SLEEPF:
	347	acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
	348	acpi_button_notify_fixed);
	349	break;
	350	default:
	351	acpi_remove_notify_handler(button->device->handle,
	352	ACPI_DEVICE_NOTIFY,
	353	acpi_button_notify);
	354	break;
	355	}
	356	}
	357
	358	static int acpi_button_add(struct acpi_device *device)
	359	{
	360	int error;
	361	struct acpi_button *button;
	362	struct input_dev *input;
1da177e4 LT	363
1da177e4 LT	364	if (!device)
d550d98d	365	return -EINVAL;
1da177e4	366
c0968f0e	367	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
1da177e4	368	if (!button)
d550d98d	369	return -ENOMEM;
1da177e4 LT	370
1da177e4 LT	371	button->device = device;
1da177e4 LT	372	acpi_driver_data(device) = button;
1da177e4 LT	373
c0968f0e DT	374	button->input = input = input_allocate_device();
	375	if (!input) {
	376	error = -ENOMEM;
	377	goto err_free_button;
	378	}
	379
1da177e4 LT	380	/*
	381	* Determine the button type (via hid), as fixed-feature buttons
	382	* need to be handled a bit differently than generic-space.
	383	*/
	384	if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
	385	button->type = ACPI_BUTTON_TYPE_POWER;
4be44fcd LB	386	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
4be44fcd LB	387	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	388	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	389	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
1da177e4 LT	390	button->type = ACPI_BUTTON_TYPE_POWERF;
1da177e4 LT	391	strcpy(acpi_device_name(device),
4be44fcd LB	392	ACPI_BUTTON_DEVICE_NAME_POWERF);
4be44fcd LB	393	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	394	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
4be44fcd	395	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
1da177e4	396	button->type = ACPI_BUTTON_TYPE_SLEEP;
4be44fcd LB	397	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
4be44fcd LB	398	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	399	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	400	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
1da177e4 LT	401	button->type = ACPI_BUTTON_TYPE_SLEEPF;
1da177e4 LT	402	strcpy(acpi_device_name(device),
4be44fcd LB	403	ACPI_BUTTON_DEVICE_NAME_SLEEPF);
4be44fcd LB	404	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	405	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
4be44fcd	406	} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
1da177e4	407	button->type = ACPI_BUTTON_TYPE_LID;
4be44fcd LB	408	strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
4be44fcd LB	409	sprintf(acpi_device_class(device), "%s/%s",
1da177e4	410	ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
4be44fcd	411	} else {
6468463a LB	412	printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
6468463a LB	413	acpi_device_hid(device));
c0968f0e DT	414	error = -ENODEV;
c0968f0e DT	415	goto err_free_input;
1da177e4 LT	416	}
1da177e4 LT	417
c0968f0e DT	418	error = acpi_button_add_fs(device);
	419	if (error)
	420	goto err_free_input;
	421
	422	error = acpi_button_install_notify_handlers(button);
	423	if (error)
	424	goto err_remove_fs;
	425
	426	snprintf(button->phys, sizeof(button->phys),
	427	"%s/button/input0", acpi_device_hid(device));
	428
	429	input->name = acpi_device_name(device);
	430	input->phys = button->phys;
	431	input->id.bustype = BUS_HOST;
	432	input->id.product = button->type;
b34a8030	433
1da177e4	434	switch (button->type) {
c0968f0e	435	case ACPI_BUTTON_TYPE_POWER:
1da177e4	436	case ACPI_BUTTON_TYPE_POWERF:
7b19ada2	437	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	438	set_bit(KEY_POWER, input->keybit);
1da177e4	439	break;
c0968f0e DT	440
c0968f0e DT	441	case ACPI_BUTTON_TYPE_SLEEP:
1da177e4	442	case ACPI_BUTTON_TYPE_SLEEPF:
7b19ada2	443	input->evbit[0] = BIT_MASK(EV_KEY);
c0968f0e	444	set_bit(KEY_SLEEP, input->keybit);
1da177e4	445	break;
c0968f0e DT	446
c0968f0e DT	447	case ACPI_BUTTON_TYPE_LID:
7b19ada2	448	input->evbit[0] = BIT_MASK(EV_SW);
c0968f0e	449	set_bit(SW_LID, input->swbit);
1da177e4 LT	450	break;
	451	}
	452
c0968f0e DT	453	error = input_register_device(input);
	454	if (error)
	455	goto err_remove_handlers;
1da177e4 LT	456
	457	if (device->wakeup.flags.valid) {
	458	/* Button's GPE is run-wake GPE */
4be44fcd LB	459	acpi_set_gpe_type(device->wakeup.gpe_device,
	460	device->wakeup.gpe_number,
	461	ACPI_GPE_TYPE_WAKE_RUN);
	462	acpi_enable_gpe(device->wakeup.gpe_device,
	463	device->wakeup.gpe_number, ACPI_NOT_ISR);
1da177e4 LT	464	device->wakeup.state.enabled = 1;
	465	}
	466
4be44fcd LB	467	printk(KERN_INFO PREFIX "%s [%s]\n",
4be44fcd LB	468	acpi_device_name(device), acpi_device_bid(device));
1da177e4	469
c0968f0e	470	return 0;
1da177e4	471
c0968f0e DT	472	err_remove_handlers:
	473	acpi_button_remove_notify_handlers(button);
	474	err_remove_fs:
	475	acpi_button_remove_fs(device);
	476	err_free_input:
	477	input_free_device(input);
	478	err_free_button:
	479	kfree(button);
	480	return error;
1da177e4 LT	481	}
1da177e4 LT	482
4be44fcd	483	static int acpi_button_remove(struct acpi_device *device, int type)
1da177e4	484	{
c0968f0e	485	struct acpi_button *button;
1da177e4 LT	486
1da177e4 LT	487	if (!device \|\| !acpi_driver_data(device))
d550d98d	488	return -EINVAL;
1da177e4 LT	489
	490	button = acpi_driver_data(device);
	491
c0968f0e	492	acpi_button_remove_notify_handlers(button);
4be44fcd	493	acpi_button_remove_fs(device);
c0968f0e	494	input_unregister_device(button->input);
1da177e4 LT	495	kfree(button);
1da177e4 LT	496
d550d98d	497	return 0;
1da177e4 LT	498	}
1da177e4 LT	499
4be44fcd	500	static int __init acpi_button_init(void)
1da177e4	501	{
c0968f0e	502	int result;
1da177e4	503
b34a8030 AS	504	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
b34a8030 AS	505	if (!acpi_button_dir)
d550d98d	506	return -ENODEV;
b34a8030	507	acpi_button_dir->owner = THIS_MODULE;
1da177e4 LT	508	result = acpi_bus_register_driver(&acpi_button_driver);
1da177e4 LT	509	if (result < 0) {
b34a8030	510	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
d550d98d	511	return -ENODEV;
1da177e4 LT	512	}
1da177e4 LT	513
d550d98d	514	return 0;
1da177e4 LT	515	}
1da177e4 LT	516
4be44fcd	517	static void __exit acpi_button_exit(void)
1da177e4	518	{
1da177e4 LT	519	acpi_bus_unregister_driver(&acpi_button_driver);
1da177e4 LT	520
4be44fcd	521	if (acpi_power_dir)
b34a8030 AS	522	remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
	523	if (acpi_sleep_dir)
	524	remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
	525	if (acpi_lid_dir)
	526	remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
	527	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
1da177e4 LT	528	}
1da177e4 LT	529
1da177e4 LT	530	module_init(acpi_button_init);
1da177e4 LT	531	module_exit(acpi_button_exit);