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

/*
 *  acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
 *
 *  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>
#ifdef CONFIG_ACPI_PROCFS
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#endif
#include <linux/power_supply.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define ACPI_AC_COMPONENT		0x00020000
#define ACPI_AC_CLASS			"ac_adapter"
#define ACPI_AC_DEVICE_NAME		"AC Adapter"
#define ACPI_AC_FILE_STATE		"state"
#define ACPI_AC_NOTIFY_STATUS		0x80
#define ACPI_AC_STATUS_OFFLINE		0x00
#define ACPI_AC_STATUS_ONLINE		0x01
#define ACPI_AC_STATUS_UNKNOWN		0xFF

#define _COMPONENT		ACPI_AC_COMPONENT
ACPI_MODULE_NAME("ac");

MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI AC Adapter Driver");
MODULE_LICENSE("GPL");

#ifdef CONFIG_ACPI_PROCFS
extern struct proc_dir_entry *acpi_lock_ac_dir(void);
extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
static int acpi_ac_open_fs(struct inode *inode, struct file *file);
#endif

static int acpi_ac_add(struct acpi_device *device);
static int acpi_ac_remove(struct acpi_device *device, int type);

const static struct acpi_device_id ac_device_ids[] = {
	{"ACPI0003", 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, ac_device_ids);

static struct acpi_driver acpi_ac_driver = {
	.name = "ac",
	.class = ACPI_AC_CLASS,
	.ids = ac_device_ids,
	.ops = {
		.add = acpi_ac_add,
		.remove = acpi_ac_remove,
		},
};

struct acpi_ac {
	struct power_supply charger;
	struct acpi_device * device;
	unsigned long state;
};

#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);

#ifdef CONFIG_ACPI_PROCFS
static const struct file_operations acpi_ac_fops = {
	.open = acpi_ac_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};
#endif

static int get_ac_property(struct power_supply *psy,
			   enum power_supply_property psp,
			   union power_supply_propval *val)
{
	struct acpi_ac *ac = to_acpi_ac(psy);
	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = ac->state;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static enum power_supply_property ac_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};

/* --------------------------------------------------------------------------
                               AC Adapter Management
   -------------------------------------------------------------------------- */

static int acpi_ac_get_state(struct acpi_ac *ac)
{
	acpi_status status = AE_OK;


	if (!ac)
		return -EINVAL;

	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
		ac->state = ACPI_AC_STATUS_UNKNOWN;
		return -ENODEV;
	}

	return 0;
}

#ifdef CONFIG_ACPI_PROCFS
/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */

static struct proc_dir_entry *acpi_ac_dir;

static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
{
	struct acpi_ac *ac = seq->private;


	if (!ac)
		return 0;

	if (acpi_ac_get_state(ac)) {
		seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
		return 0;
	}

	seq_puts(seq, "state:                   ");
	switch (ac->state) {
	case ACPI_AC_STATUS_OFFLINE:
		seq_puts(seq, "off-line\n");
		break;
	case ACPI_AC_STATUS_ONLINE:
		seq_puts(seq, "on-line\n");
		break;
	default:
		seq_puts(seq, "unknown\n");
		break;
	}

	return 0;
}

static int acpi_ac_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
}

static int acpi_ac_add_fs(struct acpi_device *device)
{
	struct proc_dir_entry *entry = NULL;


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

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

	return 0;
}

static int acpi_ac_remove_fs(struct acpi_device *device)
{

	if (acpi_device_dir(device)) {
		remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));

		remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
		acpi_device_dir(device) = NULL;
	}

	return 0;
}
#endif

/* --------------------------------------------------------------------------
                                   Driver Model
   -------------------------------------------------------------------------- */

static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
{
	struct acpi_ac *ac = data;
	struct acpi_device *device = NULL;


	if (!ac)
		return;

	device = ac->device;
	switch (event) {
	case ACPI_AC_NOTIFY_STATUS:
	case ACPI_NOTIFY_BUS_CHECK:
	case ACPI_NOTIFY_DEVICE_CHECK:
		acpi_ac_get_state(ac);
		acpi_bus_generate_proc_event(device, event, (u32) ac->state);
		acpi_bus_generate_netlink_event(device->pnp.device_class,
						  device->dev.bus_id, event,
						  (u32) ac->state);
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
		break;
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
		break;
	}

	return;
}

static int acpi_ac_add(struct acpi_device *device)
{
	int result = 0;
	acpi_status status = AE_OK;
	struct acpi_ac *ac = NULL;


	if (!device)
		return -EINVAL;

	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
	if (!ac)
		return -ENOMEM;

	ac->device = device;
	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	acpi_driver_data(device) = ac;

	result = acpi_ac_get_state(ac);
	if (result)
		goto end;

#ifdef CONFIG_ACPI_PROCFS
	result = acpi_ac_add_fs(device);
#endif
	if (result)
		goto end;
	ac->charger.name = acpi_device_bid(device);
	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	ac->charger.properties = ac_props;
	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	ac->charger.get_property = get_ac_property;
	power_supply_register(&ac->device->dev, &ac->charger);
	status = acpi_install_notify_handler(device->handle,
					     ACPI_ALL_NOTIFY, acpi_ac_notify,
					     ac);
	if (ACPI_FAILURE(status)) {
		result = -ENODEV;
		goto end;
	}

	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	       acpi_device_name(device), acpi_device_bid(device),
	       ac->state ? "on-line" : "off-line");

      end:
	if (result) {
#ifdef CONFIG_ACPI_PROCFS
		acpi_ac_remove_fs(device);
#endif
		kfree(ac);
	}

	return result;
}

static int acpi_ac_remove(struct acpi_device *device, int type)
{
	acpi_status status = AE_OK;
	struct acpi_ac *ac = NULL;


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

	ac = acpi_driver_data(device);

	status = acpi_remove_notify_handler(device->handle,
					    ACPI_ALL_NOTIFY, acpi_ac_notify);
	if (ac->charger.dev)
		power_supply_unregister(&ac->charger);
#ifdef CONFIG_ACPI_PROCFS
	acpi_ac_remove_fs(device);
#endif

	kfree(ac);

	return 0;
}

static int __init acpi_ac_init(void)
{
	int result;

	if (acpi_disabled)
		return -ENODEV;

#ifdef CONFIG_ACPI_PROCFS
	acpi_ac_dir = acpi_lock_ac_dir();
	if (!acpi_ac_dir)
		return -ENODEV;
#endif

	result = acpi_bus_register_driver(&acpi_ac_driver);
	if (result < 0) {
#ifdef CONFIG_ACPI_PROCFS
		acpi_unlock_ac_dir(acpi_ac_dir);
#endif
		return -ENODEV;
	}

	return 0;
}

static void __exit acpi_ac_exit(void)
{

	acpi_bus_unregister_driver(&acpi_ac_driver);

#ifdef CONFIG_ACPI_PROCFS
	acpi_unlock_ac_dir(acpi_ac_dir);
#endif

	return;
}

module_init(acpi_ac_init);
module_exit(acpi_ac_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
	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>
	29	#include <linux/types.h>
8a246ee4	30	#ifdef CONFIG_ACPI_PROCFS
1da177e4 LT	31	#include <linux/proc_fs.h>
1da177e4 LT	32	#include <linux/seq_file.h>
8a246ee4	33	#endif
d5b4a3d0	34	#include <linux/power_supply.h>
1da177e4 LT	35	#include <acpi/acpi_bus.h>
	36	#include <acpi/acpi_drivers.h>
	37
1da177e4 LT	38	#define ACPI_AC_COMPONENT 0x00020000
1da177e4 LT	39	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	40	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	41	#define ACPI_AC_FILE_STATE "state"
	42	#define ACPI_AC_NOTIFY_STATUS 0x80
	43	#define ACPI_AC_STATUS_OFFLINE 0x00
	44	#define ACPI_AC_STATUS_ONLINE 0x01
	45	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	46
	47	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	48	ACPI_MODULE_NAME("ac");
1da177e4	49
f52fd66d	50	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	51	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	52	MODULE_LICENSE("GPL");
1da177e4 LT	53
8a246ee4	54	#ifdef CONFIG_ACPI_PROCFS
3f86b832 RT	55	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
3f86b832 RT	56	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
8a246ee4 AB	57	static int acpi_ac_open_fs(struct inode inode, struct file file);
8a246ee4 AB	58	#endif
3f86b832	59
4be44fcd LB	60	static int acpi_ac_add(struct acpi_device *device);
4be44fcd LB	61	static int acpi_ac_remove(struct acpi_device *device, int type);
1da177e4	62
1ba90e3a TR	63	const static struct acpi_device_id ac_device_ids[] = {
	64	{"ACPI0003", 0},
	65	{"", 0},
	66	};
	67	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	68
1da177e4	69	static struct acpi_driver acpi_ac_driver = {
c2b6705b	70	.name = "ac",
4be44fcd	71	.class = ACPI_AC_CLASS,
1ba90e3a	72	.ids = ac_device_ids,
4be44fcd LB	73	.ops = {
	74	.add = acpi_ac_add,
	75	.remove = acpi_ac_remove,
	76	},
1da177e4 LT	77	};
	78
	79	struct acpi_ac {
d5b4a3d0	80	struct power_supply charger;
af96179a	81	struct acpi_device * device;
4be44fcd	82	unsigned long state;
1da177e4 LT	83	};
1da177e4 LT	84
d5b4a3d0 AS	85	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
d5b4a3d0 AS	86
8a246ee4	87	#ifdef CONFIG_ACPI_PROCFS
d7508032	88	static const struct file_operations acpi_ac_fops = {
4be44fcd LB	89	.open = acpi_ac_open_fs,
	90	.read = seq_read,
	91	.llseek = seq_lseek,
	92	.release = single_release,
1da177e4	93	};
8a246ee4 AB	94	#endif
8a246ee4 AB	95
d5b4a3d0 AS	96	static int get_ac_property(struct power_supply *psy,
	97	enum power_supply_property psp,
	98	union power_supply_propval *val)
	99	{
	100	struct acpi_ac *ac = to_acpi_ac(psy);
	101	switch (psp) {
	102	case POWER_SUPPLY_PROP_ONLINE:
	103	val->intval = ac->state;
	104	break;
	105	default:
	106	return -EINVAL;
	107	}
	108	return 0;
	109	}
	110
	111	static enum power_supply_property ac_props[] = {
	112	POWER_SUPPLY_PROP_ONLINE,
	113	};
1da177e4 LT	114
	115	/* --------------------------------------------------------------------------
	116	AC Adapter Management
	117	-------------------------------------------------------------------------- */
	118
4be44fcd	119	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	120	{
4be44fcd	121	acpi_status status = AE_OK;
1da177e4	122
1da177e4 LT	123
1da177e4 LT	124	if (!ac)
d550d98d	125	return -EINVAL;
1da177e4	126
a6ba5ebe	127	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	128	if (ACPI_FAILURE(status)) {
a6fc6720	129	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	130	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	131	return -ENODEV;
1da177e4	132	}
4be44fcd	133
d550d98d	134	return 0;
1da177e4 LT	135	}
1da177e4 LT	136
8a246ee4	137	#ifdef CONFIG_ACPI_PROCFS
1da177e4 LT	138	/* --------------------------------------------------------------------------
	139	FS Interface (/proc)
	140	-------------------------------------------------------------------------- */
	141
4be44fcd	142	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	143
	144	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	145	{
50dd0969	146	struct acpi_ac *ac = seq->private;
1da177e4	147
1da177e4 LT	148
1da177e4 LT	149	if (!ac)
d550d98d	150	return 0;
1da177e4 LT	151
	152	if (acpi_ac_get_state(ac)) {
	153	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	154	return 0;
1da177e4 LT	155	}
	156
	157	seq_puts(seq, "state: ");
	158	switch (ac->state) {
	159	case ACPI_AC_STATUS_OFFLINE:
	160	seq_puts(seq, "off-line\n");
	161	break;
	162	case ACPI_AC_STATUS_ONLINE:
	163	seq_puts(seq, "on-line\n");
	164	break;
	165	default:
	166	seq_puts(seq, "unknown\n");
	167	break;
	168	}
	169
d550d98d	170	return 0;
1da177e4	171	}
4be44fcd	172
1da177e4 LT	173	static int acpi_ac_open_fs(struct inode inode, struct file file)
	174	{
	175	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
	176	}
	177
4be44fcd	178	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	179	{
4be44fcd	180	struct proc_dir_entry *entry = NULL;
1da177e4	181
1da177e4 LT	182
	183	if (!acpi_device_dir(device)) {
	184	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	185	acpi_ac_dir);
1da177e4	186	if (!acpi_device_dir(device))
d550d98d	187	return -ENODEV;
1da177e4 LT	188	acpi_device_dir(device)->owner = THIS_MODULE;
	189	}
	190
	191	/* 'state' [R] */
	192	entry = create_proc_entry(ACPI_AC_FILE_STATE,
4be44fcd	193	S_IRUGO, acpi_device_dir(device));
1da177e4	194	if (!entry)
d550d98d	195	return -ENODEV;
1da177e4 LT	196	else {
	197	entry->proc_fops = &acpi_ac_fops;
	198	entry->data = acpi_driver_data(device);
	199	entry->owner = THIS_MODULE;
	200	}
	201
d550d98d	202	return 0;
1da177e4 LT	203	}
1da177e4 LT	204
4be44fcd	205	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	206	{
1da177e4 LT	207
1da177e4 LT	208	if (acpi_device_dir(device)) {
4be44fcd	209	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	210
	211	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	212	acpi_device_dir(device) = NULL;
	213	}
	214
d550d98d	215	return 0;
1da177e4	216	}
8a246ee4	217	#endif
1da177e4	218
1da177e4 LT	219	/* --------------------------------------------------------------------------
	220	Driver Model
	221	-------------------------------------------------------------------------- */
	222
4be44fcd	223	static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
1da177e4	224	{
50dd0969	225	struct acpi_ac *ac = data;
4be44fcd	226	struct acpi_device *device = NULL;
1da177e4	227
1da177e4 LT	228
1da177e4 LT	229	if (!ac)
d550d98d	230	return;
1da177e4	231
af96179a	232	device = ac->device;
1da177e4 LT	233	switch (event) {
1da177e4 LT	234	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	235	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	236	case ACPI_NOTIFY_DEVICE_CHECK:
1da177e4	237	acpi_ac_get_state(ac);
14e04fb3	238	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca ZR	239	acpi_bus_generate_netlink_event(device->pnp.device_class,
	240	device->dev.bus_id, event,
	241	(u32) ac->state);
d5b4a3d0	242	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
1da177e4 LT	243	break;
	244	default:
	245	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	246	"Unsupported event [0x%x]\n", event));
1da177e4 LT	247	break;
	248	}
	249
d550d98d	250	return;
1da177e4 LT	251	}
1da177e4 LT	252
4be44fcd	253	static int acpi_ac_add(struct acpi_device *device)
1da177e4	254	{
4be44fcd LB	255	int result = 0;
	256	acpi_status status = AE_OK;
	257	struct acpi_ac *ac = NULL;
1da177e4	258
1da177e4 LT	259
1da177e4 LT	260	if (!device)
d550d98d	261	return -EINVAL;
1da177e4	262
36bcbec7	263	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	264	if (!ac)
d550d98d	265	return -ENOMEM;
1da177e4	266
af96179a	267	ac->device = device;
1da177e4 LT	268	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	269	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	270	acpi_driver_data(device) = ac;
	271
	272	result = acpi_ac_get_state(ac);
	273	if (result)
	274	goto end;
	275
8a246ee4	276	#ifdef CONFIG_ACPI_PROCFS
1da177e4	277	result = acpi_ac_add_fs(device);
8a246ee4	278	#endif
1da177e4 LT	279	if (result)
1da177e4 LT	280	goto end;
d5b4a3d0 AS	281	ac->charger.name = acpi_device_bid(device);
	282	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	283	ac->charger.properties = ac_props;
	284	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	285	ac->charger.get_property = get_ac_property;
	286	power_supply_register(&ac->device->dev, &ac->charger);
a6ba5ebe	287	status = acpi_install_notify_handler(device->handle,
03d78252	288	ACPI_ALL_NOTIFY, acpi_ac_notify,
4be44fcd	289	ac);
1da177e4	290	if (ACPI_FAILURE(status)) {
1da177e4 LT	291	result = -ENODEV;
	292	goto end;
	293	}
	294
4be44fcd LB	295	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	296	acpi_device_name(device), acpi_device_bid(device),
	297	ac->state ? "on-line" : "off-line");
1da177e4	298
4be44fcd	299	end:
1da177e4	300	if (result) {
8a246ee4	301	#ifdef CONFIG_ACPI_PROCFS
1da177e4	302	acpi_ac_remove_fs(device);
8a246ee4	303	#endif
1da177e4 LT	304	kfree(ac);
	305	}
	306
d550d98d	307	return result;
1da177e4 LT	308	}
1da177e4 LT	309
4be44fcd	310	static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4	311	{
4be44fcd LB	312	acpi_status status = AE_OK;
4be44fcd LB	313	struct acpi_ac *ac = NULL;
1da177e4	314
1da177e4 LT	315
1da177e4 LT	316	if (!device \|\| !acpi_driver_data(device))
d550d98d	317	return -EINVAL;
1da177e4	318
50dd0969	319	ac = acpi_driver_data(device);
1da177e4	320
a6ba5ebe	321	status = acpi_remove_notify_handler(device->handle,
03d78252	322	ACPI_ALL_NOTIFY, acpi_ac_notify);
d5b4a3d0 AS	323	if (ac->charger.dev)
d5b4a3d0 AS	324	power_supply_unregister(&ac->charger);
8a246ee4	325	#ifdef CONFIG_ACPI_PROCFS
1da177e4	326	acpi_ac_remove_fs(device);
8a246ee4	327	#endif
1da177e4 LT	328
	329	kfree(ac);
	330
d550d98d	331	return 0;
1da177e4 LT	332	}
1da177e4 LT	333
4be44fcd	334	static int __init acpi_ac_init(void)
1da177e4	335	{
3f86b832	336	int result;
1da177e4	337
4d8316d5 PM	338	if (acpi_disabled)
4d8316d5 PM	339	return -ENODEV;
1da177e4	340
8a246ee4	341	#ifdef CONFIG_ACPI_PROCFS
3f86b832	342	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	343	if (!acpi_ac_dir)
d550d98d	344	return -ENODEV;
8a246ee4	345	#endif
1da177e4 LT	346
	347	result = acpi_bus_register_driver(&acpi_ac_driver);
	348	if (result < 0) {
8a246ee4	349	#ifdef CONFIG_ACPI_PROCFS
3f86b832	350	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	351	#endif
d550d98d	352	return -ENODEV;
1da177e4 LT	353	}
1da177e4 LT	354
d550d98d	355	return 0;
1da177e4 LT	356	}
1da177e4 LT	357
4be44fcd	358	static void __exit acpi_ac_exit(void)
1da177e4	359	{
1da177e4 LT	360
	361	acpi_bus_unregister_driver(&acpi_ac_driver);
	362
8a246ee4	363	#ifdef CONFIG_ACPI_PROCFS
3f86b832	364	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	365	#endif
1da177e4	366
d550d98d	367	return;
1da177e4 LT	368	}
1da177e4 LT	369
1da177e4 LT	370	module_init(acpi_ac_init);
1da177e4 LT	371	module_exit(acpi_ac_exit);