[mirror_ubuntu-bionic-kernel.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 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 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,
	.ops = {
		.add = acpi_ac_add,
		.remove = acpi_ac_remove,
		.resume = acpi_ac_resume,
		},
};

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;
		acpi_device_dir(device)->owner = THIS_MODULE;
	}

	/* '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(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) {
	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;
	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);
	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
	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_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)
{
	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);
#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
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);
1da177e4	64
b299c22c	65	static const struct acpi_device_id ac_device_ids[] = {
1ba90e3a TR	66	{"ACPI0003", 0},
	67	{"", 0},
	68	};
	69	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	70
1da177e4	71	static struct acpi_driver acpi_ac_driver = {
c2b6705b	72	.name = "ac",
4be44fcd	73	.class = ACPI_AC_CLASS,
1ba90e3a	74	.ids = ac_device_ids,
4be44fcd LB	75	.ops = {
	76	.add = acpi_ac_add,
	77	.remove = acpi_ac_remove,
5bfeca31	78	.resume = acpi_ac_resume,
4be44fcd	79	},
1da177e4 LT	80	};
	81
	82	struct acpi_ac {
97749cd9	83	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0	84	struct power_supply charger;
97749cd9	85	#endif
af96179a	86	struct acpi_device * device;
27663c58	87	unsigned long long state;
1da177e4 LT	88	};
1da177e4 LT	89
d5b4a3d0 AS	90	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
d5b4a3d0 AS	91
fdcedbba	92	#ifdef CONFIG_ACPI_PROCFS_POWER
d7508032	93	static const struct file_operations acpi_ac_fops = {
cf7acfab	94	.owner = THIS_MODULE,
4be44fcd LB	95	.open = acpi_ac_open_fs,
	96	.read = seq_read,
	97	.llseek = seq_lseek,
	98	.release = single_release,
1da177e4	99	};
8a246ee4	100	#endif
97749cd9	101	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	102	static int get_ac_property(struct power_supply *psy,
	103	enum power_supply_property psp,
	104	union power_supply_propval *val)
	105	{
	106	struct acpi_ac *ac = to_acpi_ac(psy);
	107	switch (psp) {
	108	case POWER_SUPPLY_PROP_ONLINE:
	109	val->intval = ac->state;
	110	break;
	111	default:
	112	return -EINVAL;
	113	}
	114	return 0;
	115	}
	116
	117	static enum power_supply_property ac_props[] = {
	118	POWER_SUPPLY_PROP_ONLINE,
	119	};
97749cd9	120	#endif
1da177e4 LT	121	/* --------------------------------------------------------------------------
	122	AC Adapter Management
	123	-------------------------------------------------------------------------- */
	124
4be44fcd	125	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	126	{
4be44fcd	127	acpi_status status = AE_OK;
1da177e4	128
1da177e4 LT	129
1da177e4 LT	130	if (!ac)
d550d98d	131	return -EINVAL;
1da177e4	132
a6ba5ebe	133	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	134	if (ACPI_FAILURE(status)) {
a6fc6720	135	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	136	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	137	return -ENODEV;
1da177e4	138	}
4be44fcd	139
d550d98d	140	return 0;
1da177e4 LT	141	}
1da177e4 LT	142
fdcedbba	143	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	144	/* --------------------------------------------------------------------------
	145	FS Interface (/proc)
	146	-------------------------------------------------------------------------- */
	147
4be44fcd	148	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	149
	150	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	151	{
50dd0969	152	struct acpi_ac *ac = seq->private;
1da177e4	153
1da177e4 LT	154
1da177e4 LT	155	if (!ac)
d550d98d	156	return 0;
1da177e4 LT	157
	158	if (acpi_ac_get_state(ac)) {
	159	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	160	return 0;
1da177e4 LT	161	}
	162
	163	seq_puts(seq, "state: ");
	164	switch (ac->state) {
	165	case ACPI_AC_STATUS_OFFLINE:
	166	seq_puts(seq, "off-line\n");
	167	break;
	168	case ACPI_AC_STATUS_ONLINE:
	169	seq_puts(seq, "on-line\n");
	170	break;
	171	default:
	172	seq_puts(seq, "unknown\n");
	173	break;
	174	}
	175
d550d98d	176	return 0;
1da177e4	177	}
4be44fcd	178
1da177e4 LT	179	static int acpi_ac_open_fs(struct inode inode, struct file file)
	180	{
	181	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
	182	}
	183
4be44fcd	184	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	185	{
4be44fcd	186	struct proc_dir_entry *entry = NULL;
1da177e4	187
1da177e4 LT	188
	189	if (!acpi_device_dir(device)) {
	190	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	191	acpi_ac_dir);
1da177e4	192	if (!acpi_device_dir(device))
d550d98d	193	return -ENODEV;
1da177e4 LT	194	acpi_device_dir(device)->owner = THIS_MODULE;
	195	}
	196
	197	/* 'state' [R] */
cf7acfab DL	198	entry = proc_create_data(ACPI_AC_FILE_STATE,
	199	S_IRUGO, acpi_device_dir(device),
	200	&acpi_ac_fops, acpi_driver_data(device));
1da177e4	201	if (!entry)
d550d98d	202	return -ENODEV;
d550d98d	203	return 0;
1da177e4 LT	204	}
1da177e4 LT	205
4be44fcd	206	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	207	{
1da177e4 LT	208
1da177e4 LT	209	if (acpi_device_dir(device)) {
4be44fcd	210	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	211
	212	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	213	acpi_device_dir(device) = NULL;
	214	}
	215
d550d98d	216	return 0;
1da177e4	217	}
8a246ee4	218	#endif
1da177e4	219
1da177e4 LT	220	/* --------------------------------------------------------------------------
	221	Driver Model
	222	-------------------------------------------------------------------------- */
	223
4be44fcd	224	static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
1da177e4	225	{
50dd0969	226	struct acpi_ac *ac = data;
4be44fcd	227	struct acpi_device *device = NULL;
1da177e4	228
1da177e4 LT	229
1da177e4 LT	230	if (!ac)
d550d98d	231	return;
1da177e4	232
af96179a	233	device = ac->device;
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 LB	256	int result = 0;
	257	acpi_status status = AE_OK;
	258	struct acpi_ac *ac = NULL;
1da177e4	259
1da177e4 LT	260
1da177e4 LT	261	if (!device)
d550d98d	262	return -EINVAL;
1da177e4	263
36bcbec7	264	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	265	if (!ac)
d550d98d	266	return -ENOMEM;
1da177e4	267
af96179a	268	ac->device = device;
1da177e4 LT	269	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
1da177e4 LT	270	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
db89b4f0	271	device->driver_data = ac;
1da177e4 LT	272
	273	result = acpi_ac_get_state(ac);
	274	if (result)
	275	goto end;
	276
fdcedbba	277	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	278	result = acpi_ac_add_fs(device);
8a246ee4	279	#endif
1da177e4 LT	280	if (result)
1da177e4 LT	281	goto end;
97749cd9	282	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	283	ac->charger.name = acpi_device_bid(device);
	284	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	285	ac->charger.properties = ac_props;
	286	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	287	ac->charger.get_property = get_ac_property;
	288	power_supply_register(&ac->device->dev, &ac->charger);
97749cd9	289	#endif
a6ba5ebe	290	status = acpi_install_notify_handler(device->handle,
03d78252	291	ACPI_ALL_NOTIFY, acpi_ac_notify,
4be44fcd	292	ac);
1da177e4	293	if (ACPI_FAILURE(status)) {
1da177e4 LT	294	result = -ENODEV;
	295	goto end;
	296	}
	297
4be44fcd LB	298	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	299	acpi_device_name(device), acpi_device_bid(device),
	300	ac->state ? "on-line" : "off-line");
1da177e4	301
4be44fcd	302	end:
1da177e4	303	if (result) {
fdcedbba	304	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	305	acpi_ac_remove_fs(device);
8a246ee4	306	#endif
1da177e4 LT	307	kfree(ac);
	308	}
	309
d550d98d	310	return result;
1da177e4 LT	311	}
1da177e4 LT	312
5bfeca31 AS	313	static int acpi_ac_resume(struct acpi_device *device)
	314	{
	315	struct acpi_ac *ac;
	316	unsigned old_state;
	317	if (!device \|\| !acpi_driver_data(device))
	318	return -EINVAL;
	319	ac = acpi_driver_data(device);
	320	old_state = ac->state;
	321	if (acpi_ac_get_state(ac))
	322	return 0;
97749cd9	323	#ifdef CONFIG_ACPI_SYSFS_POWER
5bfeca31 AS	324	if (old_state != ac->state)
5bfeca31 AS	325	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
97749cd9	326	#endif
5bfeca31 AS	327	return 0;
	328	}
	329
4be44fcd	330	static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4	331	{
4be44fcd LB	332	acpi_status status = AE_OK;
4be44fcd LB	333	struct acpi_ac *ac = NULL;
1da177e4	334
1da177e4 LT	335
1da177e4 LT	336	if (!device \|\| !acpi_driver_data(device))
d550d98d	337	return -EINVAL;
1da177e4	338
50dd0969	339	ac = acpi_driver_data(device);
1da177e4	340
a6ba5ebe	341	status = acpi_remove_notify_handler(device->handle,
03d78252	342	ACPI_ALL_NOTIFY, acpi_ac_notify);
97749cd9	343	#ifdef CONFIG_ACPI_SYSFS_POWER
d5b4a3d0 AS	344	if (ac->charger.dev)
d5b4a3d0 AS	345	power_supply_unregister(&ac->charger);
97749cd9	346	#endif
fdcedbba	347	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	348	acpi_ac_remove_fs(device);
8a246ee4	349	#endif
1da177e4 LT	350
	351	kfree(ac);
	352
d550d98d	353	return 0;
1da177e4 LT	354	}
1da177e4 LT	355
4be44fcd	356	static int __init acpi_ac_init(void)
1da177e4	357	{
3f86b832	358	int result;
1da177e4	359
4d8316d5 PM	360	if (acpi_disabled)
4d8316d5 PM	361	return -ENODEV;
1da177e4	362
fdcedbba	363	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	364	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	365	if (!acpi_ac_dir)
d550d98d	366	return -ENODEV;
8a246ee4	367	#endif
1da177e4 LT	368
	369	result = acpi_bus_register_driver(&acpi_ac_driver);
	370	if (result < 0) {
fdcedbba	371	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	372	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	373	#endif
d550d98d	374	return -ENODEV;
1da177e4 LT	375	}
1da177e4 LT	376
d550d98d	377	return 0;
1da177e4 LT	378	}
1da177e4 LT	379
4be44fcd	380	static void __exit acpi_ac_exit(void)
1da177e4	381	{
1da177e4 LT	382
	383	acpi_bus_unregister_driver(&acpi_ac_driver);
	384
fdcedbba	385	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	386	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	387	#endif
1da177e4	388
d550d98d	389	return;
1da177e4 LT	390	}
1da177e4 LT	391
1da177e4 LT	392	module_init(acpi_ac_init);
1da177e4 LT	393	module_exit(acpi_ac_exit);