[net-next-2.6.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_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 PREFIX "ACPI: "

#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);
		acpi_notifier_call_chain(device, 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 <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>
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
a192a958 LB	40	#define PREFIX "ACPI: "
a192a958 LB	41
1da177e4	42	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	43	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	44	#define ACPI_AC_FILE_STATE "state"
	45	#define ACPI_AC_NOTIFY_STATUS 0x80
	46	#define ACPI_AC_STATUS_OFFLINE 0x00
	47	#define ACPI_AC_STATUS_ONLINE 0x01
	48	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	49
	50	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	51	ACPI_MODULE_NAME("ac");
1da177e4	52
f52fd66d	53	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	54	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	55	MODULE_LICENSE("GPL");
1da177e4 LT	56
fdcedbba	57	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 RT	58	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
3f86b832 RT	59	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
8a246ee4 AB	60	static int acpi_ac_open_fs(struct inode inode, struct file file);
8a246ee4 AB	61	#endif
3f86b832	62
4be44fcd LB	63	static int acpi_ac_add(struct acpi_device *device);
4be44fcd LB	64	static int acpi_ac_remove(struct acpi_device *device, int type);
5bfeca31	65	static int acpi_ac_resume(struct acpi_device *device);
48fe1127	66	static void acpi_ac_notify(struct acpi_device *device, u32 event);
1da177e4	67
b299c22c	68	static const struct acpi_device_id ac_device_ids[] = {
1ba90e3a TR	69	{"ACPI0003", 0},
	70	{"", 0},
	71	};
	72	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	73
1da177e4	74	static struct acpi_driver acpi_ac_driver = {
c2b6705b	75	.name = "ac",
4be44fcd	76	.class = ACPI_AC_CLASS,
1ba90e3a	77	.ids = ac_device_ids,
48fe1127	78	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
4be44fcd LB	79	.ops = {
	80	.add = acpi_ac_add,
	81	.remove = acpi_ac_remove,
5bfeca31	82	.resume = acpi_ac_resume,
48fe1127	83	.notify = acpi_ac_notify,
4be44fcd	84	},
1da177e4 LT	85	};
	86
	87	struct acpi_ac {
97749cd9	88	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	89	struct power_supply charger;
97749cd9	90	#endif
af96179a	91	struct acpi_device * device;
27663c58	92	unsigned long long state;
1da177e4 LT	93	};
1da177e4 LT	94
d5b4a3d0 AS	95	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
d5b4a3d0 AS	96
fdcedbba	97	#ifdef CONFIG_ACPI_PROCFS_POWER
d7508032	98	static const struct file_operations acpi_ac_fops = {
cf7acfab	99	.owner = THIS_MODULE,
4be44fcd LB	100	.open = acpi_ac_open_fs,
	101	.read = seq_read,
	102	.llseek = seq_lseek,
	103	.release = single_release,
1da177e4	104	};
8a246ee4	105	#endif
97749cd9	106	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	107	static int get_ac_property(struct power_supply *psy,
	108	enum power_supply_property psp,
	109	union power_supply_propval *val)
	110	{
	111	struct acpi_ac *ac = to_acpi_ac(psy);
	112	switch (psp) {
	113	case POWER_SUPPLY_PROP_ONLINE:
	114	val->intval = ac->state;
	115	break;
	116	default:
	117	return -EINVAL;
	118	}
	119	return 0;
	120	}
	121
	122	static enum power_supply_property ac_props[] = {
	123	POWER_SUPPLY_PROP_ONLINE,
	124	};
97749cd9	125	#endif
1da177e4 LT	126	/* --------------------------------------------------------------------------
	127	AC Adapter Management
	128	-------------------------------------------------------------------------- */
	129
4be44fcd	130	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	131	{
4be44fcd	132	acpi_status status = AE_OK;
1da177e4	133
1da177e4 LT	134
1da177e4 LT	135	if (!ac)
d550d98d	136	return -EINVAL;
1da177e4	137
a6ba5ebe	138	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	139	if (ACPI_FAILURE(status)) {
a6fc6720	140	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	141	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	142	return -ENODEV;
1da177e4	143	}
4be44fcd	144
d550d98d	145	return 0;
1da177e4 LT	146	}
1da177e4 LT	147
fdcedbba	148	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	149	/* --------------------------------------------------------------------------
	150	FS Interface (/proc)
	151	-------------------------------------------------------------------------- */
	152
4be44fcd	153	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	154
	155	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	156	{
50dd0969	157	struct acpi_ac *ac = seq->private;
1da177e4	158
1da177e4 LT	159
1da177e4 LT	160	if (!ac)
d550d98d	161	return 0;
1da177e4 LT	162
	163	if (acpi_ac_get_state(ac)) {
	164	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	165	return 0;
1da177e4 LT	166	}
	167
	168	seq_puts(seq, "state: ");
	169	switch (ac->state) {
	170	case ACPI_AC_STATUS_OFFLINE:
	171	seq_puts(seq, "off-line\n");
	172	break;
	173	case ACPI_AC_STATUS_ONLINE:
	174	seq_puts(seq, "on-line\n");
	175	break;
	176	default:
	177	seq_puts(seq, "unknown\n");
	178	break;
	179	}
	180
d550d98d	181	return 0;
1da177e4	182	}
4be44fcd	183
1da177e4 LT	184	static int acpi_ac_open_fs(struct inode inode, struct file file)
	185	{
	186	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
	187	}
	188
4be44fcd	189	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	190	{
4be44fcd	191	struct proc_dir_entry *entry = NULL;
1da177e4	192
1da177e4 LT	193
	194	if (!acpi_device_dir(device)) {
	195	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	196	acpi_ac_dir);
1da177e4	197	if (!acpi_device_dir(device))
d550d98d	198	return -ENODEV;
1da177e4 LT	199	}
	200
	201	/* 'state' [R] */
cf7acfab DL	202	entry = proc_create_data(ACPI_AC_FILE_STATE,
	203	S_IRUGO, acpi_device_dir(device),
	204	&acpi_ac_fops, acpi_driver_data(device));
1da177e4	205	if (!entry)
d550d98d	206	return -ENODEV;
d550d98d	207	return 0;
1da177e4 LT	208	}
1da177e4 LT	209
4be44fcd	210	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	211	{
1da177e4 LT	212
1da177e4 LT	213	if (acpi_device_dir(device)) {
4be44fcd	214	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	215
	216	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	217	acpi_device_dir(device) = NULL;
	218	}
	219
d550d98d	220	return 0;
1da177e4	221	}
8a246ee4	222	#endif
1da177e4	223
1da177e4 LT	224	/* --------------------------------------------------------------------------
	225	Driver Model
	226	-------------------------------------------------------------------------- */
	227
48fe1127	228	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	229	{
48fe1127	230	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4	231
1da177e4 LT	232
1da177e4 LT	233	if (!ac)
d550d98d	234	return;
1da177e4	235
1da177e4	236	switch (event) {
f163ff51 LB	237	default:
	238	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	239	"Unsupported event [0x%x]\n", event));
1da177e4	240	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	241	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	242	case ACPI_NOTIFY_DEVICE_CHECK:
1da177e4	243	acpi_ac_get_state(ac);
14e04fb3	244	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca	245	acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d	246	dev_name(&device->dev), event,
962ce8ca	247	(u32) ac->state);
68b92b56	248	acpi_notifier_call_chain(device, event, (u32) ac->state);
97749cd9	249	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	250	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9	251	#endif
1da177e4 LT	252	}
1da177e4 LT	253
d550d98d	254	return;
1da177e4 LT	255	}
1da177e4 LT	256
4be44fcd	257	static int acpi_ac_add(struct acpi_device *device)
1da177e4	258	{
4be44fcd	259	int result = 0;
4be44fcd	260	struct acpi_ac *ac = NULL;
1da177e4	261
1da177e4 LT	262
1da177e4 LT	263	if (!device)
d550d98d	264	return -EINVAL;
1da177e4	265
36bcbec7	266	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	267	if (!ac)
d550d98d	268	return -ENOMEM;
1da177e4	269
af96179a	270	ac->device = device;
1da177e4 LT	271	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
1da177e4 LT	272	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
db89b4f0	273	device->driver_data = ac;
1da177e4 LT	274
	275	result = acpi_ac_get_state(ac);
	276	if (result)
	277	goto end;
	278
fdcedbba	279	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	280	result = acpi_ac_add_fs(device);
8a246ee4	281	#endif
1da177e4 LT	282	if (result)
1da177e4 LT	283	goto end;
97749cd9	284	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	285	ac->charger.name = acpi_device_bid(device);
	286	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	287	ac->charger.properties = ac_props;
	288	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	289	ac->charger.get_property = get_ac_property;
	290	power_supply_register(&ac->device->dev, &ac->charger);
97749cd9	291	#endif
1da177e4	292
4be44fcd LB	293	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	294	acpi_device_name(device), acpi_device_bid(device),
	295	ac->state ? "on-line" : "off-line");
1da177e4	296
4be44fcd	297	end:
1da177e4	298	if (result) {
fdcedbba	299	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	300	acpi_ac_remove_fs(device);
8a246ee4	301	#endif
1da177e4 LT	302	kfree(ac);
	303	}
	304
d550d98d	305	return result;
1da177e4 LT	306	}
1da177e4 LT	307
5bfeca31 AS	308	static int acpi_ac_resume(struct acpi_device *device)
	309	{
	310	struct acpi_ac *ac;
	311	unsigned old_state;
	312	if (!device \|\| !acpi_driver_data(device))
	313	return -EINVAL;
	314	ac = acpi_driver_data(device);
	315	old_state = ac->state;
	316	if (acpi_ac_get_state(ac))
	317	return 0;
97749cd9	318	#ifdef CONFIG_ACPI_SYSFS_POWER
5bfeca31 AS	319	if (old_state != ac->state)
5bfeca31 AS	320	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9	321	#endif
5bfeca31 AS	322	return 0;
	323	}
	324
4be44fcd	325	static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4	326	{
4be44fcd	327	struct acpi_ac *ac = NULL;
1da177e4	328
1da177e4 LT	329
1da177e4 LT	330	if (!device \|\| !acpi_driver_data(device))
d550d98d	331	return -EINVAL;
1da177e4	332
50dd0969	333	ac = acpi_driver_data(device);
1da177e4	334
97749cd9	335	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	336	if (ac->charger.dev)
d5b4a3d0 AS	337	power_supply_unregister(&ac->charger);
97749cd9	338	#endif
fdcedbba	339	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	340	acpi_ac_remove_fs(device);
8a246ee4	341	#endif
1da177e4 LT	342
	343	kfree(ac);
	344
d550d98d	345	return 0;
1da177e4 LT	346	}
1da177e4 LT	347
4be44fcd	348	static int __init acpi_ac_init(void)
1da177e4	349	{
3f86b832	350	int result;
1da177e4	351
4d8316d5 PM	352	if (acpi_disabled)
4d8316d5 PM	353	return -ENODEV;
1da177e4	354
fdcedbba	355	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	356	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	357	if (!acpi_ac_dir)
d550d98d	358	return -ENODEV;
8a246ee4	359	#endif
1da177e4 LT	360
	361	result = acpi_bus_register_driver(&acpi_ac_driver);
	362	if (result < 0) {
fdcedbba	363	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	364	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	365	#endif
d550d98d	366	return -ENODEV;
1da177e4 LT	367	}
1da177e4 LT	368
d550d98d	369	return 0;
1da177e4 LT	370	}
1da177e4 LT	371
4be44fcd	372	static void __exit acpi_ac_exit(void)
1da177e4	373	{
1da177e4 LT	374
	375	acpi_bus_unregister_driver(&acpi_ac_driver);
	376
fdcedbba	377	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	378	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	379	#endif
1da177e4	380
d550d98d	381	return;
1da177e4 LT	382	}
1da177e4 LT	383
1da177e4 LT	384	module_init(acpi_ac_init);
1da177e4 LT	385	module_exit(acpi_ac_exit);