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

/*
 *  acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
 *
 *  Copyright (C) 2001, 2002 Andy Grover <[email protected]>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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_POWER
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#endif
#ifdef CONFIG_ACPI_SYSFS_POWER
#include <linux/power_supply.h>
#endif
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#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_POWER
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);
static int acpi_ac_resume(struct acpi_device *device);
static void acpi_ac_notify(struct acpi_device *device, u32 event);

static const 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,
	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	.ops = {
		.add = acpi_ac_add,
		.remove = acpi_ac_remove,
		.resume = acpi_ac_resume,
		.notify = acpi_ac_notify,
		},
};

struct acpi_ac {
#ifdef CONFIG_ACPI_SYSFS_POWER
	struct power_supply charger;
#endif
	struct acpi_device * device;
	unsigned long long state;
};

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

#ifdef CONFIG_ACPI_PROCFS_POWER
static const struct file_operations acpi_ac_fops = {
	.owner = THIS_MODULE,
	.open = acpi_ac_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};
#endif
#ifdef CONFIG_ACPI_SYSFS_POWER
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,
};
#endif
/* --------------------------------------------------------------------------
                               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_POWER
/* --------------------------------------------------------------------------
                              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;
	}

	/* 'state' [R] */
	entry = proc_create_data(ACPI_AC_FILE_STATE,
				 S_IRUGO, acpi_device_dir(device),
				 &acpi_ac_fops, acpi_driver_data(device));
	if (!entry)
		return -ENODEV;
	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(struct acpi_device *device, u32 event)
{
	struct acpi_ac *ac = acpi_driver_data(device);


	if (!ac)
		return;

	switch (event) {
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", 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,
						  dev_name(&device->dev), event,
						  (u32) ac->state);
#ifdef CONFIG_ACPI_SYSFS_POWER
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
#endif
	}

	return;
}

static int acpi_ac_add(struct acpi_device *device)
{
	int result = 0;
	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);
	device->driver_data = ac;

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

#ifdef CONFIG_ACPI_PROCFS_POWER
	result = acpi_ac_add_fs(device);
#endif
	if (result)
		goto end;
#ifdef CONFIG_ACPI_SYSFS_POWER
	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);
#endif

	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_POWER
		acpi_ac_remove_fs(device);
#endif
		kfree(ac);
	}

	return result;
}

static int acpi_ac_resume(struct acpi_device *device)
{
	struct acpi_ac *ac;
	unsigned old_state;
	if (!device || !acpi_driver_data(device))
		return -EINVAL;
	ac = acpi_driver_data(device);
	old_state = ac->state;
	if (acpi_ac_get_state(ac))
		return 0;
#ifdef CONFIG_ACPI_SYSFS_POWER
	if (old_state != ac->state)
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
#endif
	return 0;
}

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


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

	ac = acpi_driver_data(device);

#ifdef CONFIG_ACPI_SYSFS_POWER
	if (ac->charger.dev)
		power_supply_unregister(&ac->charger);
#endif
#ifdef CONFIG_ACPI_PROCFS_POWER
	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_POWER
	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_POWER
		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_POWER
	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 <[email protected]>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]>
	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>
fdcedbba	30	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	31	#include <linux/proc_fs.h>
1da177e4 LT	32	#include <linux/seq_file.h>
8a246ee4	33	#endif
97749cd9	34	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	35	#include <linux/power_supply.h>
97749cd9	36	#endif
1da177e4 LT	37	#include <acpi/acpi_bus.h>
	38	#include <acpi/acpi_drivers.h>
	39
1da177e4	40	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	41	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	42	#define ACPI_AC_FILE_STATE "state"
	43	#define ACPI_AC_NOTIFY_STATUS 0x80
	44	#define ACPI_AC_STATUS_OFFLINE 0x00
	45	#define ACPI_AC_STATUS_ONLINE 0x01
	46	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	47
	48	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	49	ACPI_MODULE_NAME("ac");
1da177e4	50
f52fd66d	51	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	52	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	53	MODULE_LICENSE("GPL");
1da177e4 LT	54
fdcedbba	55	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 RT	56	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
3f86b832 RT	57	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
8a246ee4 AB	58	static int acpi_ac_open_fs(struct inode inode, struct file file);
8a246ee4 AB	59	#endif
3f86b832	60
4be44fcd LB	61	static int acpi_ac_add(struct acpi_device *device);
4be44fcd LB	62	static int acpi_ac_remove(struct acpi_device *device, int type);
5bfeca31	63	static int acpi_ac_resume(struct acpi_device *device);
48fe1127	64	static void acpi_ac_notify(struct acpi_device *device, u32 event);
1da177e4	65
b299c22c	66	static const struct acpi_device_id ac_device_ids[] = {
1ba90e3a TR	67	{"ACPI0003", 0},
	68	{"", 0},
	69	};
	70	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	71
1da177e4	72	static struct acpi_driver acpi_ac_driver = {
c2b6705b	73	.name = "ac",
4be44fcd	74	.class = ACPI_AC_CLASS,
1ba90e3a	75	.ids = ac_device_ids,
48fe1127	76	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
4be44fcd LB	77	.ops = {
	78	.add = acpi_ac_add,
	79	.remove = acpi_ac_remove,
5bfeca31	80	.resume = acpi_ac_resume,
48fe1127	81	.notify = acpi_ac_notify,
4be44fcd	82	},
1da177e4 LT	83	};
	84
	85	struct acpi_ac {
97749cd9	86	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	87	struct power_supply charger;
97749cd9	88	#endif
af96179a	89	struct acpi_device * device;
27663c58	90	unsigned long long state;
1da177e4 LT	91	};
1da177e4 LT	92
d5b4a3d0 AS	93	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
d5b4a3d0 AS	94
fdcedbba	95	#ifdef CONFIG_ACPI_PROCFS_POWER
d7508032	96	static const struct file_operations acpi_ac_fops = {
cf7acfab	97	.owner = THIS_MODULE,
4be44fcd LB	98	.open = acpi_ac_open_fs,
	99	.read = seq_read,
	100	.llseek = seq_lseek,
	101	.release = single_release,
1da177e4	102	};
8a246ee4	103	#endif
97749cd9	104	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	105	static int get_ac_property(struct power_supply *psy,
	106	enum power_supply_property psp,
	107	union power_supply_propval *val)
	108	{
	109	struct acpi_ac *ac = to_acpi_ac(psy);
	110	switch (psp) {
	111	case POWER_SUPPLY_PROP_ONLINE:
	112	val->intval = ac->state;
	113	break;
	114	default:
	115	return -EINVAL;
	116	}
	117	return 0;
	118	}
	119
	120	static enum power_supply_property ac_props[] = {
	121	POWER_SUPPLY_PROP_ONLINE,
	122	};
97749cd9	123	#endif
1da177e4 LT	124	/* --------------------------------------------------------------------------
	125	AC Adapter Management
	126	-------------------------------------------------------------------------- */
	127
4be44fcd	128	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	129	{
4be44fcd	130	acpi_status status = AE_OK;
1da177e4	131
1da177e4 LT	132
1da177e4 LT	133	if (!ac)
d550d98d	134	return -EINVAL;
1da177e4	135
a6ba5ebe	136	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	137	if (ACPI_FAILURE(status)) {
a6fc6720	138	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	139	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	140	return -ENODEV;
1da177e4	141	}
4be44fcd	142
d550d98d	143	return 0;
1da177e4 LT	144	}
1da177e4 LT	145
fdcedbba	146	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	147	/* --------------------------------------------------------------------------
	148	FS Interface (/proc)
	149	-------------------------------------------------------------------------- */
	150
4be44fcd	151	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	152
	153	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	154	{
50dd0969	155	struct acpi_ac *ac = seq->private;
1da177e4	156
1da177e4 LT	157
1da177e4 LT	158	if (!ac)
d550d98d	159	return 0;
1da177e4 LT	160
	161	if (acpi_ac_get_state(ac)) {
	162	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	163	return 0;
1da177e4 LT	164	}
	165
	166	seq_puts(seq, "state: ");
	167	switch (ac->state) {
	168	case ACPI_AC_STATUS_OFFLINE:
	169	seq_puts(seq, "off-line\n");
	170	break;
	171	case ACPI_AC_STATUS_ONLINE:
	172	seq_puts(seq, "on-line\n");
	173	break;
	174	default:
	175	seq_puts(seq, "unknown\n");
	176	break;
	177	}
	178
d550d98d	179	return 0;
1da177e4	180	}
4be44fcd	181
1da177e4 LT	182	static int acpi_ac_open_fs(struct inode inode, struct file file)
	183	{
	184	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
	185	}
	186
4be44fcd	187	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	188	{
4be44fcd	189	struct proc_dir_entry *entry = NULL;
1da177e4	190
1da177e4 LT	191
	192	if (!acpi_device_dir(device)) {
	193	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	194	acpi_ac_dir);
1da177e4	195	if (!acpi_device_dir(device))
d550d98d	196	return -ENODEV;
1da177e4 LT	197	}
	198
	199	/* 'state' [R] */
cf7acfab DL	200	entry = proc_create_data(ACPI_AC_FILE_STATE,
	201	S_IRUGO, acpi_device_dir(device),
	202	&acpi_ac_fops, acpi_driver_data(device));
1da177e4	203	if (!entry)
d550d98d	204	return -ENODEV;
d550d98d	205	return 0;
1da177e4 LT	206	}
1da177e4 LT	207
4be44fcd	208	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	209	{
1da177e4 LT	210
1da177e4 LT	211	if (acpi_device_dir(device)) {
4be44fcd	212	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	213
	214	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	215	acpi_device_dir(device) = NULL;
	216	}
	217
d550d98d	218	return 0;
1da177e4	219	}
8a246ee4	220	#endif
1da177e4	221
1da177e4 LT	222	/* --------------------------------------------------------------------------
	223	Driver Model
	224	-------------------------------------------------------------------------- */
	225
48fe1127	226	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	227	{
48fe1127	228	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4	229
1da177e4 LT	230
1da177e4 LT	231	if (!ac)
d550d98d	232	return;
1da177e4	233
1da177e4	234	switch (event) {
f163ff51 LB	235	default:
	236	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	237	"Unsupported event [0x%x]\n", event));
1da177e4	238	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	239	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	240	case ACPI_NOTIFY_DEVICE_CHECK:
1da177e4	241	acpi_ac_get_state(ac);
14e04fb3	242	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca	243	acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d	244	dev_name(&device->dev), event,
962ce8ca	245	(u32) ac->state);
97749cd9	246	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	247	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9	248	#endif
1da177e4 LT	249	}
1da177e4 LT	250
d550d98d	251	return;
1da177e4 LT	252	}
1da177e4 LT	253
4be44fcd	254	static int acpi_ac_add(struct acpi_device *device)
1da177e4	255	{
4be44fcd	256	int result = 0;
4be44fcd	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);
1da177e4 LT	269	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
db89b4f0	270	device->driver_data = ac;
1da177e4 LT	271
	272	result = acpi_ac_get_state(ac);
	273	if (result)
	274	goto end;
	275
fdcedbba	276	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	277	result = acpi_ac_add_fs(device);
8a246ee4	278	#endif
1da177e4 LT	279	if (result)
1da177e4 LT	280	goto end;
97749cd9	281	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	282	ac->charger.name = acpi_device_bid(device);
	283	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	284	ac->charger.properties = ac_props;
	285	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	286	ac->charger.get_property = get_ac_property;
	287	power_supply_register(&ac->device->dev, &ac->charger);
97749cd9	288	#endif
1da177e4	289
4be44fcd LB	290	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	291	acpi_device_name(device), acpi_device_bid(device),
	292	ac->state ? "on-line" : "off-line");
1da177e4	293
4be44fcd	294	end:
1da177e4	295	if (result) {
fdcedbba	296	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	297	acpi_ac_remove_fs(device);
8a246ee4	298	#endif
1da177e4 LT	299	kfree(ac);
	300	}
	301
d550d98d	302	return result;
1da177e4 LT	303	}
1da177e4 LT	304
5bfeca31 AS	305	static int acpi_ac_resume(struct acpi_device *device)
	306	{
	307	struct acpi_ac *ac;
	308	unsigned old_state;
	309	if (!device \|\| !acpi_driver_data(device))
	310	return -EINVAL;
	311	ac = acpi_driver_data(device);
	312	old_state = ac->state;
	313	if (acpi_ac_get_state(ac))
	314	return 0;
97749cd9	315	#ifdef CONFIG_ACPI_SYSFS_POWER
5bfeca31 AS	316	if (old_state != ac->state)
5bfeca31 AS	317	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9	318	#endif
5bfeca31 AS	319	return 0;
	320	}
	321
4be44fcd	322	static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4	323	{
4be44fcd	324	struct acpi_ac *ac = NULL;
1da177e4	325
1da177e4 LT	326
1da177e4 LT	327	if (!device \|\| !acpi_driver_data(device))
d550d98d	328	return -EINVAL;
1da177e4	329
50dd0969	330	ac = acpi_driver_data(device);
1da177e4	331
97749cd9	332	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	333	if (ac->charger.dev)
d5b4a3d0 AS	334	power_supply_unregister(&ac->charger);
97749cd9	335	#endif
fdcedbba	336	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	337	acpi_ac_remove_fs(device);
8a246ee4	338	#endif
1da177e4 LT	339
	340	kfree(ac);
	341
d550d98d	342	return 0;
1da177e4 LT	343	}
1da177e4 LT	344
4be44fcd	345	static int __init acpi_ac_init(void)
1da177e4	346	{
3f86b832	347	int result;
1da177e4	348
4d8316d5 PM	349	if (acpi_disabled)
4d8316d5 PM	350	return -ENODEV;
1da177e4	351
fdcedbba	352	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	353	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	354	if (!acpi_ac_dir)
d550d98d	355	return -ENODEV;
8a246ee4	356	#endif
1da177e4 LT	357
	358	result = acpi_bus_register_driver(&acpi_ac_driver);
	359	if (result < 0) {
fdcedbba	360	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	361	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	362	#endif
d550d98d	363	return -ENODEV;
1da177e4 LT	364	}
1da177e4 LT	365
d550d98d	366	return 0;
1da177e4 LT	367	}
1da177e4 LT	368
4be44fcd	369	static void __exit acpi_ac_exit(void)
1da177e4	370	{
1da177e4 LT	371
	372	acpi_bus_unregister_driver(&acpi_ac_driver);
	373
fdcedbba	374	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	375	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	376	#endif
1da177e4	377
d550d98d	378	return;
1da177e4 LT	379	}
1da177e4 LT	380
1da177e4 LT	381	module_init(acpi_ac_init);
1da177e4 LT	382	module_exit(acpi_ac_exit);