[mirror_ubuntu-artful-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/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/dmi.h>
#include <linux/delay.h>
#ifdef CONFIG_ACPI_PROCFS_POWER
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#endif
#include <linux/platform_device.h>
#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 ac_sleep_before_get_state_ms;

struct acpi_ac {
	struct power_supply charger;
	struct acpi_device *adev;
	struct platform_device *pdev;
	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;

	status = acpi_evaluate_integer(ac->adev->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_DATA(inode));
}

static int acpi_ac_add_fs(struct acpi_ac *ac)
{
	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(ac->adev)) {
		acpi_device_dir(ac->adev) =
			proc_mkdir(acpi_device_bid(ac->adev), acpi_ac_dir);
		if (!acpi_device_dir(ac->adev))
			return -ENODEV;
	}

	/* 'state' [R] */
	entry = proc_create_data(ACPI_AC_FILE_STATE,
				 S_IRUGO, acpi_device_dir(ac->adev),
				 &acpi_ac_fops, ac);
	if (!entry)
		return -ENODEV;
	return 0;
}

static int acpi_ac_remove_fs(struct acpi_ac *ac)
{

	if (acpi_device_dir(ac->adev)) {
		remove_proc_entry(ACPI_AC_FILE_STATE,
				  acpi_device_dir(ac->adev));
		remove_proc_entry(acpi_device_bid(ac->adev), acpi_ac_dir);
		acpi_device_dir(ac->adev) = NULL;
	}

	return 0;
}
#endif

/* --------------------------------------------------------------------------
                                   Driver Model
   -------------------------------------------------------------------------- */

static void acpi_ac_notify_handler(acpi_handle handle, u32 event, void *data)
{
	struct acpi_ac *ac = data;

	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:
		/*
		 * A buggy BIOS may notify AC first and then sleep for
		 * a specific time before doing actual operations in the
		 * EC event handler (_Qxx). This will cause the AC state
		 * reported by the ACPI event to be incorrect, so wait for a
		 * specific time for the EC event handler to make progress.
		 */
		if (ac_sleep_before_get_state_ms > 0)
			msleep(ac_sleep_before_get_state_ms);

		acpi_ac_get_state(ac);
		acpi_bus_generate_netlink_event(ac->adev->pnp.device_class,
						dev_name(&ac->pdev->dev),
						event, (u32) ac->state);
		acpi_notifier_call_chain(ac->adev, event, (u32) ac->state);
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	}

	return;
}

static int thinkpad_e530_quirk(const struct dmi_system_id *d)
{
	ac_sleep_before_get_state_ms = 1000;
	return 0;
}

static struct dmi_system_id ac_dmi_table[] = {
	{
	.callback = thinkpad_e530_quirk,
	.ident = "thinkpad e530",
	.matches = {
		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
		DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
		},
	},
	{},
};

static int acpi_ac_probe(struct platform_device *pdev)
{
	int result = 0;
	struct acpi_ac *ac = NULL;
	struct acpi_device *adev;

	if (!pdev)
		return -EINVAL;

	result = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
	if (result)
		return -ENODEV;

	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
	if (!ac)
		return -ENOMEM;

	strcpy(acpi_device_name(adev), ACPI_AC_DEVICE_NAME);
	strcpy(acpi_device_class(adev), ACPI_AC_CLASS);
	ac->adev = adev;
	ac->pdev = pdev;
	platform_set_drvdata(pdev, ac);

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

#ifdef CONFIG_ACPI_PROCFS_POWER
	result = acpi_ac_add_fs(ac);
	if (result)
		goto end;
#endif
	ac->charger.name = acpi_device_bid(adev);
	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(&pdev->dev, &ac->charger);
	if (result)
		goto end;

	result = acpi_install_notify_handler(ACPI_HANDLE(&pdev->dev),
			ACPI_DEVICE_NOTIFY, acpi_ac_notify_handler, ac);
	if (result) {
		power_supply_unregister(&ac->charger);
		goto end;
	}
	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	       acpi_device_name(adev), acpi_device_bid(adev),
	       ac->state ? "on-line" : "off-line");

      end:
	if (result) {
#ifdef CONFIG_ACPI_PROCFS_POWER
		acpi_ac_remove_fs(ac);
#endif
		kfree(ac);
	}

	dmi_check_system(ac_dmi_table);
	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 = platform_get_drvdata(to_platform_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 SIMPLE_DEV_PM_OPS(acpi_ac_pm_ops, NULL, acpi_ac_resume);

static int acpi_ac_remove(struct platform_device *pdev)
{
	struct acpi_ac *ac;

	if (!pdev)
		return -EINVAL;

	acpi_remove_notify_handler(ACPI_HANDLE(&pdev->dev),
			ACPI_DEVICE_NOTIFY, acpi_ac_notify_handler);

	ac = platform_get_drvdata(pdev);
	if (ac->charger.dev)
		power_supply_unregister(&ac->charger);

#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_ac_remove_fs(ac);
#endif

	kfree(ac);

	return 0;
}

static const struct acpi_device_id acpi_ac_match[] = {
	{ "ACPI0003", 0 },
	{ }
};
MODULE_DEVICE_TABLE(acpi, acpi_ac_match);

static struct platform_driver acpi_ac_driver = {
	.probe          = acpi_ac_probe,
	.remove         = acpi_ac_remove,
	.driver         = {
		.name   = "acpi-ac",
		.owner  = THIS_MODULE,
		.pm     = &acpi_ac_pm_ops,
		.acpi_match_table = ACPI_PTR(acpi_ac_match),
	},
};

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 = platform_driver_register(&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)
{
	platform_driver_unregister(&acpi_ac_driver);
#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_unlock_ac_dir(acpi_ac_dir);
#endif
}
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>
0ab5bb64 LT	31	#include <linux/dmi.h>
0ab5bb64 LT	32	#include <linux/delay.h>
fdcedbba	33	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	34	#include <linux/proc_fs.h>
1da177e4 LT	35	#include <linux/seq_file.h>
8a246ee4	36	#endif
cc8ef527	37	#include <linux/platform_device.h>
d5b4a3d0	38	#include <linux/power_supply.h>
1da177e4 LT	39	#include <acpi/acpi_bus.h>
	40	#include <acpi/acpi_drivers.h>
	41
a192a958 LB	42	#define PREFIX "ACPI: "
a192a958 LB	43
1da177e4	44	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	45	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	46	#define ACPI_AC_FILE_STATE "state"
	47	#define ACPI_AC_NOTIFY_STATUS 0x80
	48	#define ACPI_AC_STATUS_OFFLINE 0x00
	49	#define ACPI_AC_STATUS_ONLINE 0x01
	50	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	51
	52	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	53	ACPI_MODULE_NAME("ac");
1da177e4	54
f52fd66d	55	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	56	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	57	MODULE_LICENSE("GPL");
1da177e4 LT	58
fdcedbba	59	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 RT	60	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
3f86b832 RT	61	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
8a246ee4 AB	62	static int acpi_ac_open_fs(struct inode inode, struct file file);
8a246ee4 AB	63	#endif
3f86b832	64
0ab5bb64 LT	65	static int ac_sleep_before_get_state_ms;
0ab5bb64 LT	66
1da177e4	67	struct acpi_ac {
d5b4a3d0	68	struct power_supply charger;
cc8ef527 ZR	69	struct acpi_device *adev;
cc8ef527 ZR	70	struct platform_device *pdev;
27663c58	71	unsigned long long state;
1da177e4 LT	72	};
1da177e4 LT	73
497888cf	74	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
d5b4a3d0	75
fdcedbba	76	#ifdef CONFIG_ACPI_PROCFS_POWER
d7508032	77	static const struct file_operations acpi_ac_fops = {
cf7acfab	78	.owner = THIS_MODULE,
4be44fcd LB	79	.open = acpi_ac_open_fs,
	80	.read = seq_read,
	81	.llseek = seq_lseek,
	82	.release = single_release,
1da177e4	83	};
8a246ee4	84	#endif
d5b4a3d0	85
1da177e4 LT	86	/* --------------------------------------------------------------------------
	87	AC Adapter Management
	88	-------------------------------------------------------------------------- */
	89
4be44fcd	90	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	91	{
cc8ef527	92	acpi_status status;
1da177e4	93
cc8ef527 ZR	94	status = acpi_evaluate_integer(ac->adev->handle, "_PSR", NULL,
cc8ef527 ZR	95	&ac->state);
1da177e4	96	if (ACPI_FAILURE(status)) {
cc8ef527 ZR	97	ACPI_EXCEPTION((AE_INFO, status,
cc8ef527 ZR	98	"Error reading AC Adapter state"));
1da177e4	99	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	100	return -ENODEV;
1da177e4	101	}
4be44fcd	102
d550d98d	103	return 0;
1da177e4 LT	104	}
1da177e4 LT	105
3151dbb0 ZR	106	/* --------------------------------------------------------------------------
	107	sysfs I/F
	108	-------------------------------------------------------------------------- */
	109	static int get_ac_property(struct power_supply *psy,
	110	enum power_supply_property psp,
	111	union power_supply_propval *val)
	112	{
	113	struct acpi_ac *ac = to_acpi_ac(psy);
	114
	115	if (!ac)
	116	return -ENODEV;
	117
	118	if (acpi_ac_get_state(ac))
	119	return -ENODEV;
	120
	121	switch (psp) {
	122	case POWER_SUPPLY_PROP_ONLINE:
	123	val->intval = ac->state;
	124	break;
	125	default:
	126	return -EINVAL;
	127	}
	128	return 0;
	129	}
	130
	131	static enum power_supply_property ac_props[] = {
	132	POWER_SUPPLY_PROP_ONLINE,
	133	};
	134
fdcedbba	135	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	136	/* --------------------------------------------------------------------------
	137	FS Interface (/proc)
	138	-------------------------------------------------------------------------- */
	139
4be44fcd	140	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	141
	142	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	143	{
50dd0969	144	struct acpi_ac *ac = seq->private;
1da177e4	145
1da177e4 LT	146
1da177e4 LT	147	if (!ac)
d550d98d	148	return 0;
1da177e4 LT	149
	150	if (acpi_ac_get_state(ac)) {
	151	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	152	return 0;
1da177e4 LT	153	}
	154
	155	seq_puts(seq, "state: ");
	156	switch (ac->state) {
	157	case ACPI_AC_STATUS_OFFLINE:
	158	seq_puts(seq, "off-line\n");
	159	break;
	160	case ACPI_AC_STATUS_ONLINE:
	161	seq_puts(seq, "on-line\n");
	162	break;
	163	default:
	164	seq_puts(seq, "unknown\n");
	165	break;
	166	}
	167
d550d98d	168	return 0;
1da177e4	169	}
4be44fcd	170
1da177e4 LT	171	static int acpi_ac_open_fs(struct inode inode, struct file file)
1da177e4 LT	172	{
d9dda78b	173	return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
1da177e4 LT	174	}
1da177e4 LT	175
cc8ef527	176	static int acpi_ac_add_fs(struct acpi_ac *ac)
1da177e4	177	{
4be44fcd	178	struct proc_dir_entry *entry = NULL;
1da177e4	179
6d855fcd ZR	180	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
6d855fcd ZR	181	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
cc8ef527 ZR	182	if (!acpi_device_dir(ac->adev)) {
	183	acpi_device_dir(ac->adev) =
	184	proc_mkdir(acpi_device_bid(ac->adev), acpi_ac_dir);
	185	if (!acpi_device_dir(ac->adev))
d550d98d	186	return -ENODEV;
1da177e4 LT	187	}
	188
	189	/* 'state' [R] */
cf7acfab	190	entry = proc_create_data(ACPI_AC_FILE_STATE,
cc8ef527 ZR	191	S_IRUGO, acpi_device_dir(ac->adev),
cc8ef527 ZR	192	&acpi_ac_fops, ac);
1da177e4	193	if (!entry)
d550d98d	194	return -ENODEV;
d550d98d	195	return 0;
1da177e4 LT	196	}
1da177e4 LT	197
cc8ef527	198	static int acpi_ac_remove_fs(struct acpi_ac *ac)
1da177e4	199	{
1da177e4	200
cc8ef527 ZR	201	if (acpi_device_dir(ac->adev)) {
	202	remove_proc_entry(ACPI_AC_FILE_STATE,
	203	acpi_device_dir(ac->adev));
	204	remove_proc_entry(acpi_device_bid(ac->adev), acpi_ac_dir);
	205	acpi_device_dir(ac->adev) = NULL;
1da177e4 LT	206	}
1da177e4 LT	207
d550d98d	208	return 0;
1da177e4	209	}
8a246ee4	210	#endif
1da177e4	211
1da177e4 LT	212	/* --------------------------------------------------------------------------
	213	Driver Model
	214	-------------------------------------------------------------------------- */
	215
cc8ef527	216	static void acpi_ac_notify_handler(acpi_handle handle, u32 event, void *data)
1da177e4	217	{
cc8ef527	218	struct acpi_ac *ac = data;
1da177e4 LT	219
1da177e4 LT	220	if (!ac)
d550d98d	221	return;
1da177e4	222
1da177e4	223	switch (event) {
f163ff51 LB	224	default:
	225	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	226	"Unsupported event [0x%x]\n", event));
1da177e4	227	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	228	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	229	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	230	/*
	231	* A buggy BIOS may notify AC first and then sleep for
	232	* a specific time before doing actual operations in the
	233	* EC event handler (_Qxx). This will cause the AC state
	234	* reported by the ACPI event to be incorrect, so wait for a
	235	* specific time for the EC event handler to make progress.
	236	*/
	237	if (ac_sleep_before_get_state_ms > 0)
	238	msleep(ac_sleep_before_get_state_ms);
	239
1da177e4	240	acpi_ac_get_state(ac);
cc8ef527 ZR	241	acpi_bus_generate_netlink_event(ac->adev->pnp.device_class,
	242	dev_name(&ac->pdev->dev),
	243	event, (u32) ac->state);
	244	acpi_notifier_call_chain(ac->adev, event, (u32) ac->state);
d5b4a3d0	245	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
1da177e4 LT	246	}
1da177e4 LT	247
d550d98d	248	return;
1da177e4 LT	249	}
1da177e4 LT	250
0ab5bb64 LT	251	static int thinkpad_e530_quirk(const struct dmi_system_id *d)
	252	{
	253	ac_sleep_before_get_state_ms = 1000;
	254	return 0;
	255	}
	256
	257	static struct dmi_system_id ac_dmi_table[] = {
	258	{
	259	.callback = thinkpad_e530_quirk,
	260	.ident = "thinkpad e530",
	261	.matches = {
	262	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	263	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	264	},
	265	},
	266	{},
	267	};
	268
cc8ef527	269	static int acpi_ac_probe(struct platform_device *pdev)
1da177e4	270	{
4be44fcd	271	int result = 0;
4be44fcd	272	struct acpi_ac *ac = NULL;
cc8ef527	273	struct acpi_device *adev;
1da177e4	274
cc8ef527	275	if (!pdev)
d550d98d	276	return -EINVAL;
1da177e4	277
cc8ef527 ZR	278	result = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
	279	if (result)
	280	return -ENODEV;
	281
36bcbec7	282	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	283	if (!ac)
d550d98d	284	return -ENOMEM;
1da177e4	285
cc8ef527 ZR	286	strcpy(acpi_device_name(adev), ACPI_AC_DEVICE_NAME);
	287	strcpy(acpi_device_class(adev), ACPI_AC_CLASS);
	288	ac->adev = adev;
	289	ac->pdev = pdev;
	290	platform_set_drvdata(pdev, ac);
1da177e4 LT	291
	292	result = acpi_ac_get_state(ac);
	293	if (result)
	294	goto end;
	295
fdcedbba	296	#ifdef CONFIG_ACPI_PROCFS_POWER
cc8ef527	297	result = acpi_ac_add_fs(ac);
1da177e4 LT	298	if (result)
1da177e4 LT	299	goto end;
cc8ef527 ZR	300	#endif
cc8ef527 ZR	301	ac->charger.name = acpi_device_bid(adev);
d5b4a3d0 AS	302	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	303	ac->charger.properties = ac_props;
	304	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	305	ac->charger.get_property = get_ac_property;
cc8ef527	306	result = power_supply_register(&pdev->dev, &ac->charger);
f197ac13 LT	307	if (result)
f197ac13 LT	308	goto end;
1da177e4	309
cc8ef527 ZR	310	result = acpi_install_notify_handler(ACPI_HANDLE(&pdev->dev),
	311	ACPI_DEVICE_NOTIFY, acpi_ac_notify_handler, ac);
	312	if (result) {
	313	power_supply_unregister(&ac->charger);
	314	goto end;
	315	}
4be44fcd	316	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
cc8ef527	317	acpi_device_name(adev), acpi_device_bid(adev),
4be44fcd	318	ac->state ? "on-line" : "off-line");
1da177e4	319
4be44fcd	320	end:
1da177e4	321	if (result) {
fdcedbba	322	#ifdef CONFIG_ACPI_PROCFS_POWER
cc8ef527	323	acpi_ac_remove_fs(ac);
8a246ee4	324	#endif
1da177e4 LT	325	kfree(ac);
	326	}
	327
0ab5bb64	328	dmi_check_system(ac_dmi_table);
d550d98d	329	return result;
1da177e4 LT	330	}
1da177e4 LT	331
90692404	332	#ifdef CONFIG_PM_SLEEP
ccda7069	333	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	334	{
	335	struct acpi_ac *ac;
	336	unsigned old_state;
ccda7069 RW	337
	338	if (!dev)
	339	return -EINVAL;
	340
cc8ef527	341	ac = platform_get_drvdata(to_platform_device(dev));
ccda7069	342	if (!ac)
5bfeca31	343	return -EINVAL;
ccda7069	344
5bfeca31 AS	345	old_state = ac->state;
	346	if (acpi_ac_get_state(ac))
	347	return 0;
	348	if (old_state != ac->state)
	349	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	350	return 0;
	351	}
90692404	352	#endif
cc8ef527	353	static SIMPLE_DEV_PM_OPS(acpi_ac_pm_ops, NULL, acpi_ac_resume);
5bfeca31	354
cc8ef527	355	static int acpi_ac_remove(struct platform_device *pdev)
1da177e4	356	{
cc8ef527	357	struct acpi_ac *ac;
1da177e4	358
cc8ef527	359	if (!pdev)
d550d98d	360	return -EINVAL;
1da177e4	361
cc8ef527 ZR	362	acpi_remove_notify_handler(ACPI_HANDLE(&pdev->dev),
cc8ef527 ZR	363	ACPI_DEVICE_NOTIFY, acpi_ac_notify_handler);
1da177e4	364
cc8ef527	365	ac = platform_get_drvdata(pdev);
d5b4a3d0 AS	366	if (ac->charger.dev)
d5b4a3d0 AS	367	power_supply_unregister(&ac->charger);
cc8ef527	368
fdcedbba	369	#ifdef CONFIG_ACPI_PROCFS_POWER
cc8ef527	370	acpi_ac_remove_fs(ac);
8a246ee4	371	#endif
1da177e4 LT	372
	373	kfree(ac);
	374
d550d98d	375	return 0;
1da177e4 LT	376	}
1da177e4 LT	377
cc8ef527 ZR	378	static const struct acpi_device_id acpi_ac_match[] = {
	379	{ "ACPI0003", 0 },
	380	{ }
	381	};
	382	MODULE_DEVICE_TABLE(acpi, acpi_ac_match);
	383
	384	static struct platform_driver acpi_ac_driver = {
	385	.probe = acpi_ac_probe,
	386	.remove = acpi_ac_remove,
	387	.driver = {
	388	.name = "acpi-ac",
	389	.owner = THIS_MODULE,
	390	.pm = &acpi_ac_pm_ops,
	391	.acpi_match_table = ACPI_PTR(acpi_ac_match),
	392	},
	393	};
	394
4be44fcd	395	static int __init acpi_ac_init(void)
1da177e4	396	{
3f86b832	397	int result;
1da177e4	398
4d8316d5 PM	399	if (acpi_disabled)
4d8316d5 PM	400	return -ENODEV;
1da177e4	401
fdcedbba	402	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	403	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	404	if (!acpi_ac_dir)
d550d98d	405	return -ENODEV;
8a246ee4	406	#endif
1da177e4	407
cc8ef527	408	result = platform_driver_register(&acpi_ac_driver);
1da177e4	409	if (result < 0) {
fdcedbba	410	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	411	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	412	#endif
d550d98d	413	return -ENODEV;
1da177e4 LT	414	}
1da177e4 LT	415
d550d98d	416	return 0;
1da177e4 LT	417	}
1da177e4 LT	418
4be44fcd	419	static void __exit acpi_ac_exit(void)
1da177e4	420	{
cc8ef527	421	platform_driver_unregister(&acpi_ac_driver);
fdcedbba	422	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	423	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	424	#endif
1da177e4	425	}
1da177e4 LT	426	module_init(acpi_ac_init);
1da177e4 LT	427	module_exit(acpi_ac_exit);