[GitHub/mt8127/android_kernel_alcatel_ttab.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/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);
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 int ac_sleep_before_get_state_ms;

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_DATA(inode));
}

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:
		/*
		 * 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_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 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_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);
	}

	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 = 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)
{
	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 <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
d5b4a3d0	37	#include <linux/power_supply.h>
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	64	static int acpi_ac_add(struct acpi_device *device);
51fac838	65	static int acpi_ac_remove(struct acpi_device *device);
48fe1127	66	static void acpi_ac_notify(struct acpi_device *device, u32 event);
1da177e4	67
b299c22c	68	static const struct acpi_device_id ac_device_ids[] = {
1ba90e3a TR	69	{"ACPI0003", 0},
	70	{"", 0},
	71	};
	72	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	73
90692404	74	#ifdef CONFIG_PM_SLEEP
ccda7069	75	static int acpi_ac_resume(struct device *dev);
90692404	76	#endif
ccda7069 RW	77	static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
ccda7069 RW	78
0ab5bb64 LT	79	static int ac_sleep_before_get_state_ms;
0ab5bb64 LT	80
1da177e4	81	static struct acpi_driver acpi_ac_driver = {
c2b6705b	82	.name = "ac",
4be44fcd	83	.class = ACPI_AC_CLASS,
1ba90e3a	84	.ids = ac_device_ids,
48fe1127	85	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
4be44fcd LB	86	.ops = {
	87	.add = acpi_ac_add,
	88	.remove = acpi_ac_remove,
48fe1127	89	.notify = acpi_ac_notify,
4be44fcd	90	},
ccda7069	91	.drv.pm = &acpi_ac_pm,
1da177e4 LT	92	};
	93
	94	struct acpi_ac {
d5b4a3d0	95	struct power_supply charger;
af96179a	96	struct acpi_device * device;
27663c58	97	unsigned long long state;
1da177e4 LT	98	};
1da177e4 LT	99
497888cf	100	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
d5b4a3d0	101
fdcedbba	102	#ifdef CONFIG_ACPI_PROCFS_POWER
d7508032	103	static const struct file_operations acpi_ac_fops = {
cf7acfab	104	.owner = THIS_MODULE,
4be44fcd LB	105	.open = acpi_ac_open_fs,
	106	.read = seq_read,
	107	.llseek = seq_lseek,
	108	.release = single_release,
1da177e4	109	};
8a246ee4	110	#endif
d5b4a3d0	111
1da177e4 LT	112	/* --------------------------------------------------------------------------
	113	AC Adapter Management
	114	-------------------------------------------------------------------------- */
	115
4be44fcd	116	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	117	{
4be44fcd	118	acpi_status status = AE_OK;
1da177e4	119
1da177e4 LT	120
1da177e4 LT	121	if (!ac)
d550d98d	122	return -EINVAL;
1da177e4	123
a6ba5ebe	124	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	125	if (ACPI_FAILURE(status)) {
a6fc6720	126	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	127	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	128	return -ENODEV;
1da177e4	129	}
4be44fcd	130
d550d98d	131	return 0;
1da177e4 LT	132	}
1da177e4 LT	133
3151dbb0 ZR	134	/* --------------------------------------------------------------------------
	135	sysfs I/F
	136	-------------------------------------------------------------------------- */
	137	static int get_ac_property(struct power_supply *psy,
	138	enum power_supply_property psp,
	139	union power_supply_propval *val)
	140	{
	141	struct acpi_ac *ac = to_acpi_ac(psy);
	142
	143	if (!ac)
	144	return -ENODEV;
	145
	146	if (acpi_ac_get_state(ac))
	147	return -ENODEV;
	148
	149	switch (psp) {
	150	case POWER_SUPPLY_PROP_ONLINE:
	151	val->intval = ac->state;
	152	break;
	153	default:
	154	return -EINVAL;
	155	}
	156	return 0;
	157	}
	158
	159	static enum power_supply_property ac_props[] = {
	160	POWER_SUPPLY_PROP_ONLINE,
	161	};
	162
fdcedbba	163	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	164	/* --------------------------------------------------------------------------
	165	FS Interface (/proc)
	166	-------------------------------------------------------------------------- */
	167
4be44fcd	168	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	169
	170	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	171	{
50dd0969	172	struct acpi_ac *ac = seq->private;
1da177e4	173
1da177e4 LT	174
1da177e4 LT	175	if (!ac)
d550d98d	176	return 0;
1da177e4 LT	177
	178	if (acpi_ac_get_state(ac)) {
	179	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	180	return 0;
1da177e4 LT	181	}
	182
	183	seq_puts(seq, "state: ");
	184	switch (ac->state) {
	185	case ACPI_AC_STATUS_OFFLINE:
	186	seq_puts(seq, "off-line\n");
	187	break;
	188	case ACPI_AC_STATUS_ONLINE:
	189	seq_puts(seq, "on-line\n");
	190	break;
	191	default:
	192	seq_puts(seq, "unknown\n");
	193	break;
	194	}
	195
d550d98d	196	return 0;
1da177e4	197	}
4be44fcd	198
1da177e4 LT	199	static int acpi_ac_open_fs(struct inode inode, struct file file)
1da177e4 LT	200	{
d9dda78b	201	return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
1da177e4 LT	202	}
1da177e4 LT	203
4be44fcd	204	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	205	{
4be44fcd	206	struct proc_dir_entry *entry = NULL;
1da177e4	207
6d855fcd ZR	208	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
6d855fcd ZR	209	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
1da177e4 LT	210	if (!acpi_device_dir(device)) {
1da177e4 LT	211	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	212	acpi_ac_dir);
1da177e4	213	if (!acpi_device_dir(device))
d550d98d	214	return -ENODEV;
1da177e4 LT	215	}
	216
	217	/* 'state' [R] */
cf7acfab DL	218	entry = proc_create_data(ACPI_AC_FILE_STATE,
	219	S_IRUGO, acpi_device_dir(device),
	220	&acpi_ac_fops, acpi_driver_data(device));
1da177e4	221	if (!entry)
d550d98d	222	return -ENODEV;
d550d98d	223	return 0;
1da177e4 LT	224	}
1da177e4 LT	225
4be44fcd	226	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	227	{
1da177e4 LT	228
1da177e4 LT	229	if (acpi_device_dir(device)) {
4be44fcd	230	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	231
	232	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	233	acpi_device_dir(device) = NULL;
	234	}
	235
d550d98d	236	return 0;
1da177e4	237	}
8a246ee4	238	#endif
1da177e4	239
1da177e4 LT	240	/* --------------------------------------------------------------------------
	241	Driver Model
	242	-------------------------------------------------------------------------- */
	243
48fe1127	244	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	245	{
48fe1127	246	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4	247
1da177e4 LT	248
1da177e4 LT	249	if (!ac)
d550d98d	250	return;
1da177e4	251
1da177e4	252	switch (event) {
f163ff51 LB	253	default:
	254	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	255	"Unsupported event [0x%x]\n", event));
1da177e4	256	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	257	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	258	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	259	/*
	260	* A buggy BIOS may notify AC first and then sleep for
	261	* a specific time before doing actual operations in the
	262	* EC event handler (_Qxx). This will cause the AC state
	263	* reported by the ACPI event to be incorrect, so wait for a
	264	* specific time for the EC event handler to make progress.
	265	*/
	266	if (ac_sleep_before_get_state_ms > 0)
	267	msleep(ac_sleep_before_get_state_ms);
	268
1da177e4	269	acpi_ac_get_state(ac);
14e04fb3	270	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca	271	acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d	272	dev_name(&device->dev), event,
962ce8ca	273	(u32) ac->state);
68b92b56	274	acpi_notifier_call_chain(device, event, (u32) ac->state);
d5b4a3d0	275	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
1da177e4 LT	276	}
1da177e4 LT	277
d550d98d	278	return;
1da177e4 LT	279	}
1da177e4 LT	280
0ab5bb64 LT	281	static int thinkpad_e530_quirk(const struct dmi_system_id *d)
	282	{
	283	ac_sleep_before_get_state_ms = 1000;
	284	return 0;
	285	}
	286
	287	static struct dmi_system_id ac_dmi_table[] = {
	288	{
	289	.callback = thinkpad_e530_quirk,
	290	.ident = "thinkpad e530",
	291	.matches = {
	292	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	293	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	294	},
	295	},
	296	{},
	297	};
	298
4be44fcd	299	static int acpi_ac_add(struct acpi_device *device)
1da177e4	300	{
4be44fcd	301	int result = 0;
4be44fcd	302	struct acpi_ac *ac = NULL;
1da177e4	303
1da177e4 LT	304
1da177e4 LT	305	if (!device)
d550d98d	306	return -EINVAL;
1da177e4	307
36bcbec7	308	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	309	if (!ac)
d550d98d	310	return -ENOMEM;
1da177e4	311
af96179a	312	ac->device = device;
1da177e4 LT	313	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
1da177e4 LT	314	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
db89b4f0	315	device->driver_data = ac;
1da177e4 LT	316
	317	result = acpi_ac_get_state(ac);
	318	if (result)
	319	goto end;
	320
fdcedbba	321	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	322	result = acpi_ac_add_fs(device);
8a246ee4	323	#endif
1da177e4 LT	324	if (result)
1da177e4 LT	325	goto end;
d5b4a3d0 AS	326	ac->charger.name = acpi_device_bid(device);
	327	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	328	ac->charger.properties = ac_props;
	329	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	330	ac->charger.get_property = get_ac_property;
f197ac13 LT	331	result = power_supply_register(&ac->device->dev, &ac->charger);
	332	if (result)
	333	goto end;
1da177e4	334
4be44fcd LB	335	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	336	acpi_device_name(device), acpi_device_bid(device),
	337	ac->state ? "on-line" : "off-line");
1da177e4	338
4be44fcd	339	end:
1da177e4	340	if (result) {
fdcedbba	341	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	342	acpi_ac_remove_fs(device);
8a246ee4	343	#endif
1da177e4 LT	344	kfree(ac);
	345	}
	346
0ab5bb64	347	dmi_check_system(ac_dmi_table);
d550d98d	348	return result;
1da177e4 LT	349	}
1da177e4 LT	350
90692404	351	#ifdef CONFIG_PM_SLEEP
ccda7069	352	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	353	{
	354	struct acpi_ac *ac;
	355	unsigned old_state;
ccda7069 RW	356
	357	if (!dev)
	358	return -EINVAL;
	359
	360	ac = acpi_driver_data(to_acpi_device(dev));
	361	if (!ac)
5bfeca31	362	return -EINVAL;
ccda7069	363
5bfeca31 AS	364	old_state = ac->state;
	365	if (acpi_ac_get_state(ac))
	366	return 0;
	367	if (old_state != ac->state)
	368	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	369	return 0;
	370	}
90692404	371	#endif
5bfeca31	372
51fac838	373	static int acpi_ac_remove(struct acpi_device *device)
1da177e4	374	{
4be44fcd	375	struct acpi_ac *ac = NULL;
1da177e4	376
1da177e4 LT	377
1da177e4 LT	378	if (!device \|\| !acpi_driver_data(device))
d550d98d	379	return -EINVAL;
1da177e4	380
50dd0969	381	ac = acpi_driver_data(device);
1da177e4	382
d5b4a3d0 AS	383	if (ac->charger.dev)
d5b4a3d0 AS	384	power_supply_unregister(&ac->charger);
fdcedbba	385	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	386	acpi_ac_remove_fs(device);
8a246ee4	387	#endif
1da177e4 LT	388
	389	kfree(ac);
	390
d550d98d	391	return 0;
1da177e4 LT	392	}
1da177e4 LT	393
4be44fcd	394	static int __init acpi_ac_init(void)
1da177e4	395	{
3f86b832	396	int result;
1da177e4	397
4d8316d5 PM	398	if (acpi_disabled)
4d8316d5 PM	399	return -ENODEV;
1da177e4	400
fdcedbba	401	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	402	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	403	if (!acpi_ac_dir)
d550d98d	404	return -ENODEV;
8a246ee4	405	#endif
1da177e4 LT	406
	407	result = acpi_bus_register_driver(&acpi_ac_driver);
	408	if (result < 0) {
fdcedbba	409	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	410	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	411	#endif
d550d98d	412	return -ENODEV;
1da177e4 LT	413	}
1da177e4 LT	414
d550d98d	415	return 0;
1da177e4 LT	416	}
1da177e4 LT	417
4be44fcd	418	static void __exit acpi_ac_exit(void)
1da177e4	419	{
1da177e4 LT	420
	421	acpi_bus_unregister_driver(&acpi_ac_driver);
	422
fdcedbba	423	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	424	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	425	#endif
1da177e4	426
d550d98d	427	return;
1da177e4 LT	428	}
1da177e4 LT	429
1da177e4 LT	430	module_init(acpi_ac_init);
1da177e4 LT	431	module_exit(acpi_ac_exit);