[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/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
#include <linux/power_supply.h>
#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 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);

#ifdef CONFIG_PM_SLEEP
static int acpi_ac_resume(struct device *dev);
#endif
static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);

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,
		.notify = acpi_ac_notify,
		},
	.drv.pm = &acpi_ac_pm,
};

struct acpi_ac {
	struct power_supply charger;
	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

/* --------------------------------------------------------------------------
                               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;
}

/* --------------------------------------------------------------------------
                            sysfs I/F
   -------------------------------------------------------------------------- */
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);

	if (!ac)
		return -ENODEV;

	if (acpi_ac_get_state(ac))
		return -ENODEV;

	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,
};

#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;

	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
			" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	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);
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	}

	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;
	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;
	result = power_supply_register(&ac->device->dev, &ac->charger);
	if (result)
		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_POWER
		acpi_ac_remove_fs(device);
#endif
		kfree(ac);
	}

	return result;
}

#ifdef CONFIG_PM_SLEEP
static int acpi_ac_resume(struct device *dev)
{
	struct acpi_ac *ac;
	unsigned old_state;

	if (!dev)
		return -EINVAL;

	ac = acpi_driver_data(to_acpi_device(dev));
	if (!ac)
		return -EINVAL;

	old_state = ac->state;
	if (acpi_ac_get_state(ac))
		return 0;
	if (old_state != ac->state)
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	return 0;
}
#endif

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);

	if (ac->charger.dev)
		power_supply_unregister(&ac->charger);
#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>
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
d5b4a3d0	35	#include <linux/power_supply.h>
1da177e4 LT	36	#include <acpi/acpi_bus.h>
	37	#include <acpi/acpi_drivers.h>
	38
a192a958 LB	39	#define PREFIX "ACPI: "
a192a958 LB	40
1da177e4	41	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	42	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	43	#define ACPI_AC_FILE_STATE "state"
	44	#define ACPI_AC_NOTIFY_STATUS 0x80
	45	#define ACPI_AC_STATUS_OFFLINE 0x00
	46	#define ACPI_AC_STATUS_ONLINE 0x01
	47	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	48
	49	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	50	ACPI_MODULE_NAME("ac");
1da177e4	51
f52fd66d	52	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	53	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	54	MODULE_LICENSE("GPL");
1da177e4 LT	55
fdcedbba	56	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 RT	57	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
3f86b832 RT	58	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
8a246ee4 AB	59	static int acpi_ac_open_fs(struct inode inode, struct file file);
8a246ee4 AB	60	#endif
3f86b832	61
4be44fcd LB	62	static int acpi_ac_add(struct acpi_device *device);
4be44fcd LB	63	static int acpi_ac_remove(struct acpi_device *device, int type);
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
90692404	72	#ifdef CONFIG_PM_SLEEP
ccda7069	73	static int acpi_ac_resume(struct device *dev);
90692404	74	#endif
ccda7069 RW	75	static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
ccda7069 RW	76
1da177e4	77	static struct acpi_driver acpi_ac_driver = {
c2b6705b	78	.name = "ac",
4be44fcd	79	.class = ACPI_AC_CLASS,
1ba90e3a	80	.ids = ac_device_ids,
48fe1127	81	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
4be44fcd LB	82	.ops = {
	83	.add = acpi_ac_add,
	84	.remove = acpi_ac_remove,
48fe1127	85	.notify = acpi_ac_notify,
4be44fcd	86	},
ccda7069	87	.drv.pm = &acpi_ac_pm,
1da177e4 LT	88	};
	89
	90	struct acpi_ac {
d5b4a3d0	91	struct power_supply charger;
af96179a	92	struct acpi_device * device;
27663c58	93	unsigned long long state;
1da177e4 LT	94	};
1da177e4 LT	95
497888cf	96	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
d5b4a3d0	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
d5b4a3d0	107
1da177e4 LT	108	/* --------------------------------------------------------------------------
	109	AC Adapter Management
	110	-------------------------------------------------------------------------- */
	111
4be44fcd	112	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	113	{
4be44fcd	114	acpi_status status = AE_OK;
1da177e4	115
1da177e4 LT	116
1da177e4 LT	117	if (!ac)
d550d98d	118	return -EINVAL;
1da177e4	119
a6ba5ebe	120	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	121	if (ACPI_FAILURE(status)) {
a6fc6720	122	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	123	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	124	return -ENODEV;
1da177e4	125	}
4be44fcd	126
d550d98d	127	return 0;
1da177e4 LT	128	}
1da177e4 LT	129
3151dbb0 ZR	130	/* --------------------------------------------------------------------------
	131	sysfs I/F
	132	-------------------------------------------------------------------------- */
	133	static int get_ac_property(struct power_supply *psy,
	134	enum power_supply_property psp,
	135	union power_supply_propval *val)
	136	{
	137	struct acpi_ac *ac = to_acpi_ac(psy);
	138
	139	if (!ac)
	140	return -ENODEV;
	141
	142	if (acpi_ac_get_state(ac))
	143	return -ENODEV;
	144
	145	switch (psp) {
	146	case POWER_SUPPLY_PROP_ONLINE:
	147	val->intval = ac->state;
	148	break;
	149	default:
	150	return -EINVAL;
	151	}
	152	return 0;
	153	}
	154
	155	static enum power_supply_property ac_props[] = {
	156	POWER_SUPPLY_PROP_ONLINE,
	157	};
	158
fdcedbba	159	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	160	/* --------------------------------------------------------------------------
	161	FS Interface (/proc)
	162	-------------------------------------------------------------------------- */
	163
4be44fcd	164	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	165
	166	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	167	{
50dd0969	168	struct acpi_ac *ac = seq->private;
1da177e4	169
1da177e4 LT	170
1da177e4 LT	171	if (!ac)
d550d98d	172	return 0;
1da177e4 LT	173
	174	if (acpi_ac_get_state(ac)) {
	175	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	176	return 0;
1da177e4 LT	177	}
	178
	179	seq_puts(seq, "state: ");
	180	switch (ac->state) {
	181	case ACPI_AC_STATUS_OFFLINE:
	182	seq_puts(seq, "off-line\n");
	183	break;
	184	case ACPI_AC_STATUS_ONLINE:
	185	seq_puts(seq, "on-line\n");
	186	break;
	187	default:
	188	seq_puts(seq, "unknown\n");
	189	break;
	190	}
	191
d550d98d	192	return 0;
1da177e4	193	}
4be44fcd	194
1da177e4 LT	195	static int acpi_ac_open_fs(struct inode inode, struct file file)
	196	{
	197	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
	198	}
	199
4be44fcd	200	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	201	{
4be44fcd	202	struct proc_dir_entry *entry = NULL;
1da177e4	203
6d855fcd ZR	204	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
6d855fcd ZR	205	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
1da177e4 LT	206	if (!acpi_device_dir(device)) {
1da177e4 LT	207	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	208	acpi_ac_dir);
1da177e4	209	if (!acpi_device_dir(device))
d550d98d	210	return -ENODEV;
1da177e4 LT	211	}
	212
	213	/* 'state' [R] */
cf7acfab DL	214	entry = proc_create_data(ACPI_AC_FILE_STATE,
	215	S_IRUGO, acpi_device_dir(device),
	216	&acpi_ac_fops, acpi_driver_data(device));
1da177e4	217	if (!entry)
d550d98d	218	return -ENODEV;
d550d98d	219	return 0;
1da177e4 LT	220	}
1da177e4 LT	221
4be44fcd	222	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	223	{
1da177e4 LT	224
1da177e4 LT	225	if (acpi_device_dir(device)) {
4be44fcd	226	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	227
	228	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	229	acpi_device_dir(device) = NULL;
	230	}
	231
d550d98d	232	return 0;
1da177e4	233	}
8a246ee4	234	#endif
1da177e4	235
1da177e4 LT	236	/* --------------------------------------------------------------------------
	237	Driver Model
	238	-------------------------------------------------------------------------- */
	239
48fe1127	240	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	241	{
48fe1127	242	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4	243
1da177e4 LT	244
1da177e4 LT	245	if (!ac)
d550d98d	246	return;
1da177e4	247
1da177e4	248	switch (event) {
f163ff51 LB	249	default:
	250	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	251	"Unsupported event [0x%x]\n", event));
1da177e4	252	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	253	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	254	case ACPI_NOTIFY_DEVICE_CHECK:
1da177e4	255	acpi_ac_get_state(ac);
14e04fb3	256	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca	257	acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d	258	dev_name(&device->dev), event,
962ce8ca	259	(u32) ac->state);
68b92b56	260	acpi_notifier_call_chain(device, event, (u32) ac->state);
d5b4a3d0	261	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
1da177e4 LT	262	}
1da177e4 LT	263
d550d98d	264	return;
1da177e4 LT	265	}
1da177e4 LT	266
4be44fcd	267	static int acpi_ac_add(struct acpi_device *device)
1da177e4	268	{
4be44fcd	269	int result = 0;
4be44fcd	270	struct acpi_ac *ac = NULL;
1da177e4	271
1da177e4 LT	272
1da177e4 LT	273	if (!device)
d550d98d	274	return -EINVAL;
1da177e4	275
36bcbec7	276	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	277	if (!ac)
d550d98d	278	return -ENOMEM;
1da177e4	279
af96179a	280	ac->device = device;
1da177e4 LT	281	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
1da177e4 LT	282	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
db89b4f0	283	device->driver_data = ac;
1da177e4 LT	284
	285	result = acpi_ac_get_state(ac);
	286	if (result)
	287	goto end;
	288
fdcedbba	289	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	290	result = acpi_ac_add_fs(device);
8a246ee4	291	#endif
1da177e4 LT	292	if (result)
1da177e4 LT	293	goto end;
d5b4a3d0 AS	294	ac->charger.name = acpi_device_bid(device);
	295	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	296	ac->charger.properties = ac_props;
	297	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	298	ac->charger.get_property = get_ac_property;
f197ac13 LT	299	result = power_supply_register(&ac->device->dev, &ac->charger);
	300	if (result)
	301	goto end;
1da177e4	302
4be44fcd LB	303	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	304	acpi_device_name(device), acpi_device_bid(device),
	305	ac->state ? "on-line" : "off-line");
1da177e4	306
4be44fcd	307	end:
1da177e4	308	if (result) {
fdcedbba	309	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	310	acpi_ac_remove_fs(device);
8a246ee4	311	#endif
1da177e4 LT	312	kfree(ac);
	313	}
	314
d550d98d	315	return result;
1da177e4 LT	316	}
1da177e4 LT	317
90692404	318	#ifdef CONFIG_PM_SLEEP
ccda7069	319	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	320	{
	321	struct acpi_ac *ac;
	322	unsigned old_state;
ccda7069 RW	323
	324	if (!dev)
	325	return -EINVAL;
	326
	327	ac = acpi_driver_data(to_acpi_device(dev));
	328	if (!ac)
5bfeca31	329	return -EINVAL;
ccda7069	330
5bfeca31 AS	331	old_state = ac->state;
	332	if (acpi_ac_get_state(ac))
	333	return 0;
	334	if (old_state != ac->state)
	335	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	336	return 0;
	337	}
90692404	338	#endif
5bfeca31	339
4be44fcd	340	static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4	341	{
4be44fcd	342	struct acpi_ac *ac = NULL;
1da177e4	343
1da177e4 LT	344
1da177e4 LT	345	if (!device \|\| !acpi_driver_data(device))
d550d98d	346	return -EINVAL;
1da177e4	347
50dd0969	348	ac = acpi_driver_data(device);
1da177e4	349
d5b4a3d0 AS	350	if (ac->charger.dev)
d5b4a3d0 AS	351	power_supply_unregister(&ac->charger);
fdcedbba	352	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	353	acpi_ac_remove_fs(device);
8a246ee4	354	#endif
1da177e4 LT	355
	356	kfree(ac);
	357
d550d98d	358	return 0;
1da177e4 LT	359	}
1da177e4 LT	360
4be44fcd	361	static int __init acpi_ac_init(void)
1da177e4	362	{
3f86b832	363	int result;
1da177e4	364
4d8316d5 PM	365	if (acpi_disabled)
4d8316d5 PM	366	return -ENODEV;
1da177e4	367
fdcedbba	368	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	369	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	370	if (!acpi_ac_dir)
d550d98d	371	return -ENODEV;
8a246ee4	372	#endif
1da177e4 LT	373
	374	result = acpi_bus_register_driver(&acpi_ac_driver);
	375	if (result < 0) {
fdcedbba	376	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	377	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	378	#endif
d550d98d	379	return -ENODEV;
1da177e4 LT	380	}
1da177e4 LT	381
d550d98d	382	return 0;
1da177e4 LT	383	}
1da177e4 LT	384
4be44fcd	385	static void __exit acpi_ac_exit(void)
1da177e4	386	{
1da177e4 LT	387
	388	acpi_bus_unregister_driver(&acpi_ac_driver);
	389
fdcedbba	390	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	391	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	392	#endif
1da177e4	393
d550d98d	394	return;
1da177e4 LT	395	}
1da177e4 LT	396
1da177e4 LT	397	module_init(acpi_ac_init);
1da177e4 LT	398	module_exit(acpi_ac_exit);