[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/slab.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>
5a0e3ad6	28	#include <linux/slab.h>
1da177e4 LT	29	#include <linux/init.h>
1da177e4 LT	30	#include <linux/types.h>
fdcedbba	31	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	32	#include <linux/proc_fs.h>
1da177e4 LT	33	#include <linux/seq_file.h>
8a246ee4	34	#endif
97749cd9	35	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	36	#include <linux/power_supply.h>
97749cd9	37	#endif
1da177e4 LT	38	#include <acpi/acpi_bus.h>
	39	#include <acpi/acpi_drivers.h>
	40
a192a958 LB	41	#define PREFIX "ACPI: "
a192a958 LB	42
1da177e4	43	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	44	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	45	#define ACPI_AC_FILE_STATE "state"
	46	#define ACPI_AC_NOTIFY_STATUS 0x80
	47	#define ACPI_AC_STATUS_OFFLINE 0x00
	48	#define ACPI_AC_STATUS_ONLINE 0x01
	49	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	50
	51	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	52	ACPI_MODULE_NAME("ac");
1da177e4	53
f52fd66d	54	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	55	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	56	MODULE_LICENSE("GPL");
1da177e4 LT	57
fdcedbba	58	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 RT	59	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
3f86b832 RT	60	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
8a246ee4 AB	61	static int acpi_ac_open_fs(struct inode inode, struct file file);
8a246ee4 AB	62	#endif
3f86b832	63
4be44fcd LB	64	static int acpi_ac_add(struct acpi_device *device);
4be44fcd LB	65	static int acpi_ac_remove(struct acpi_device *device, int type);
5bfeca31	66	static int acpi_ac_resume(struct acpi_device *device);
48fe1127	67	static void acpi_ac_notify(struct acpi_device *device, u32 event);
1da177e4	68
b299c22c	69	static const struct acpi_device_id ac_device_ids[] = {
1ba90e3a TR	70	{"ACPI0003", 0},
	71	{"", 0},
	72	};
	73	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	74
1da177e4	75	static struct acpi_driver acpi_ac_driver = {
c2b6705b	76	.name = "ac",
4be44fcd	77	.class = ACPI_AC_CLASS,
1ba90e3a	78	.ids = ac_device_ids,
48fe1127	79	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
4be44fcd LB	80	.ops = {
	81	.add = acpi_ac_add,
	82	.remove = acpi_ac_remove,
5bfeca31	83	.resume = acpi_ac_resume,
48fe1127	84	.notify = acpi_ac_notify,
4be44fcd	85	},
1da177e4 LT	86	};
	87
	88	struct acpi_ac {
97749cd9	89	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	90	struct power_supply charger;
97749cd9	91	#endif
af96179a	92	struct acpi_device * device;
27663c58	93	unsigned long long state;
1da177e4 LT	94	};
1da177e4 LT	95
d5b4a3d0 AS	96	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
d5b4a3d0 AS	97
fdcedbba	98	#ifdef CONFIG_ACPI_PROCFS_POWER
d7508032	99	static const struct file_operations acpi_ac_fops = {
cf7acfab	100	.owner = THIS_MODULE,
4be44fcd LB	101	.open = acpi_ac_open_fs,
	102	.read = seq_read,
	103	.llseek = seq_lseek,
	104	.release = single_release,
1da177e4	105	};
8a246ee4	106	#endif
97749cd9	107	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	108	static int get_ac_property(struct power_supply *psy,
	109	enum power_supply_property psp,
	110	union power_supply_propval *val)
	111	{
	112	struct acpi_ac *ac = to_acpi_ac(psy);
	113	switch (psp) {
	114	case POWER_SUPPLY_PROP_ONLINE:
	115	val->intval = ac->state;
	116	break;
	117	default:
	118	return -EINVAL;
	119	}
	120	return 0;
	121	}
	122
	123	static enum power_supply_property ac_props[] = {
	124	POWER_SUPPLY_PROP_ONLINE,
	125	};
97749cd9	126	#endif
1da177e4 LT	127	/* --------------------------------------------------------------------------
	128	AC Adapter Management
	129	-------------------------------------------------------------------------- */
	130
4be44fcd	131	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	132	{
4be44fcd	133	acpi_status status = AE_OK;
1da177e4	134
1da177e4 LT	135
1da177e4 LT	136	if (!ac)
d550d98d	137	return -EINVAL;
1da177e4	138
a6ba5ebe	139	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	140	if (ACPI_FAILURE(status)) {
a6fc6720	141	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	142	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	143	return -ENODEV;
1da177e4	144	}
4be44fcd	145
d550d98d	146	return 0;
1da177e4 LT	147	}
1da177e4 LT	148
fdcedbba	149	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	150	/* --------------------------------------------------------------------------
	151	FS Interface (/proc)
	152	-------------------------------------------------------------------------- */
	153
4be44fcd	154	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	155
	156	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	157	{
50dd0969	158	struct acpi_ac *ac = seq->private;
1da177e4	159
1da177e4 LT	160
1da177e4 LT	161	if (!ac)
d550d98d	162	return 0;
1da177e4 LT	163
	164	if (acpi_ac_get_state(ac)) {
	165	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	166	return 0;
1da177e4 LT	167	}
	168
	169	seq_puts(seq, "state: ");
	170	switch (ac->state) {
	171	case ACPI_AC_STATUS_OFFLINE:
	172	seq_puts(seq, "off-line\n");
	173	break;
	174	case ACPI_AC_STATUS_ONLINE:
	175	seq_puts(seq, "on-line\n");
	176	break;
	177	default:
	178	seq_puts(seq, "unknown\n");
	179	break;
	180	}
	181
d550d98d	182	return 0;
1da177e4	183	}
4be44fcd	184
1da177e4 LT	185	static int acpi_ac_open_fs(struct inode inode, struct file file)
	186	{
	187	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
	188	}
	189
4be44fcd	190	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	191	{
4be44fcd	192	struct proc_dir_entry *entry = NULL;
1da177e4	193
1da177e4 LT	194
	195	if (!acpi_device_dir(device)) {
	196	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	197	acpi_ac_dir);
1da177e4	198	if (!acpi_device_dir(device))
d550d98d	199	return -ENODEV;
1da177e4 LT	200	}
	201
	202	/* 'state' [R] */
cf7acfab DL	203	entry = proc_create_data(ACPI_AC_FILE_STATE,
	204	S_IRUGO, acpi_device_dir(device),
	205	&acpi_ac_fops, acpi_driver_data(device));
1da177e4	206	if (!entry)
d550d98d	207	return -ENODEV;
d550d98d	208	return 0;
1da177e4 LT	209	}
1da177e4 LT	210
4be44fcd	211	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	212	{
1da177e4 LT	213
1da177e4 LT	214	if (acpi_device_dir(device)) {
4be44fcd	215	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	216
	217	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	218	acpi_device_dir(device) = NULL;
	219	}
	220
d550d98d	221	return 0;
1da177e4	222	}
8a246ee4	223	#endif
1da177e4	224
1da177e4 LT	225	/* --------------------------------------------------------------------------
	226	Driver Model
	227	-------------------------------------------------------------------------- */
	228
48fe1127	229	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	230	{
48fe1127	231	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4	232
1da177e4 LT	233
1da177e4 LT	234	if (!ac)
d550d98d	235	return;
1da177e4	236
1da177e4	237	switch (event) {
f163ff51 LB	238	default:
	239	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	240	"Unsupported event [0x%x]\n", event));
1da177e4	241	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	242	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	243	case ACPI_NOTIFY_DEVICE_CHECK:
1da177e4	244	acpi_ac_get_state(ac);
14e04fb3	245	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca	246	acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d	247	dev_name(&device->dev), event,
962ce8ca	248	(u32) ac->state);
68b92b56	249	acpi_notifier_call_chain(device, event, (u32) ac->state);
97749cd9	250	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	251	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9	252	#endif
1da177e4 LT	253	}
1da177e4 LT	254
d550d98d	255	return;
1da177e4 LT	256	}
1da177e4 LT	257
4be44fcd	258	static int acpi_ac_add(struct acpi_device *device)
1da177e4	259	{
4be44fcd	260	int result = 0;
4be44fcd	261	struct acpi_ac *ac = NULL;
1da177e4	262
1da177e4 LT	263
1da177e4 LT	264	if (!device)
d550d98d	265	return -EINVAL;
1da177e4	266
36bcbec7	267	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	268	if (!ac)
d550d98d	269	return -ENOMEM;
1da177e4	270
af96179a	271	ac->device = device;
1da177e4 LT	272	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
1da177e4 LT	273	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
db89b4f0	274	device->driver_data = ac;
1da177e4 LT	275
	276	result = acpi_ac_get_state(ac);
	277	if (result)
	278	goto end;
	279
fdcedbba	280	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	281	result = acpi_ac_add_fs(device);
8a246ee4	282	#endif
1da177e4 LT	283	if (result)
1da177e4 LT	284	goto end;
97749cd9	285	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	286	ac->charger.name = acpi_device_bid(device);
	287	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	288	ac->charger.properties = ac_props;
	289	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	290	ac->charger.get_property = get_ac_property;
	291	power_supply_register(&ac->device->dev, &ac->charger);
97749cd9	292	#endif
1da177e4	293
4be44fcd LB	294	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	295	acpi_device_name(device), acpi_device_bid(device),
	296	ac->state ? "on-line" : "off-line");
1da177e4	297
4be44fcd	298	end:
1da177e4	299	if (result) {
fdcedbba	300	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	301	acpi_ac_remove_fs(device);
8a246ee4	302	#endif
1da177e4 LT	303	kfree(ac);
	304	}
	305
d550d98d	306	return result;
1da177e4 LT	307	}
1da177e4 LT	308
5bfeca31 AS	309	static int acpi_ac_resume(struct acpi_device *device)
	310	{
	311	struct acpi_ac *ac;
	312	unsigned old_state;
	313	if (!device \|\| !acpi_driver_data(device))
	314	return -EINVAL;
	315	ac = acpi_driver_data(device);
	316	old_state = ac->state;
	317	if (acpi_ac_get_state(ac))
	318	return 0;
97749cd9	319	#ifdef CONFIG_ACPI_SYSFS_POWER
5bfeca31 AS	320	if (old_state != ac->state)
5bfeca31 AS	321	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9	322	#endif
5bfeca31 AS	323	return 0;
	324	}
	325
4be44fcd	326	static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4	327	{
4be44fcd	328	struct acpi_ac *ac = NULL;
1da177e4	329
1da177e4 LT	330
1da177e4 LT	331	if (!device \|\| !acpi_driver_data(device))
d550d98d	332	return -EINVAL;
1da177e4	333
50dd0969	334	ac = acpi_driver_data(device);
1da177e4	335
97749cd9	336	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	337	if (ac->charger.dev)
d5b4a3d0 AS	338	power_supply_unregister(&ac->charger);
97749cd9	339	#endif
fdcedbba	340	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	341	acpi_ac_remove_fs(device);
8a246ee4	342	#endif
1da177e4 LT	343
	344	kfree(ac);
	345
d550d98d	346	return 0;
1da177e4 LT	347	}
1da177e4 LT	348
4be44fcd	349	static int __init acpi_ac_init(void)
1da177e4	350	{
3f86b832	351	int result;
1da177e4	352
4d8316d5 PM	353	if (acpi_disabled)
4d8316d5 PM	354	return -ENODEV;
1da177e4	355
fdcedbba	356	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	357	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	358	if (!acpi_ac_dir)
d550d98d	359	return -ENODEV;
8a246ee4	360	#endif
1da177e4 LT	361
	362	result = acpi_bus_register_driver(&acpi_ac_driver);
	363	if (result < 0) {
fdcedbba	364	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	365	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	366	#endif
d550d98d	367	return -ENODEV;
1da177e4 LT	368	}
1da177e4 LT	369
d550d98d	370	return 0;
1da177e4 LT	371	}
1da177e4 LT	372
4be44fcd	373	static void __exit acpi_ac_exit(void)
1da177e4	374	{
1da177e4 LT	375
	376	acpi_bus_unregister_driver(&acpi_ac_driver);
	377
fdcedbba	378	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	379	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	380	#endif
1da177e4	381
d550d98d	382	return;
1da177e4 LT	383	}
1da177e4 LT	384
1da177e4 LT	385	module_init(acpi_ac_init);
1da177e4 LT	386	module_exit(acpi_ac_exit);