[linux-block.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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#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 <linux/acpi.h>
#include <acpi/battery.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");


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);

struct acpi_ac_bl {
	const char *hid;
	int hrv;
};

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

/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
static const struct acpi_ac_bl acpi_ac_blacklist[] = {
	{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
	{ "INT34D3",  3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
};

#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);

#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);
#endif


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 power_supply_desc charger_desc;
	struct acpi_device * device;
	unsigned long long state;
	struct notifier_block battery_nb;
};

#define to_acpi_ac(x) power_supply_get_drvdata(x)

/* --------------------------------------------------------------------------
                               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_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->device)) {
		acpi_device_dir(ac->device) =
			proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
		if (!acpi_device_dir(ac->device))
			return -ENODEV;
	}

	/* 'state' [R] */
	entry = proc_create_single_data(ACPI_AC_FILE_STATE, S_IRUGO,
			acpi_device_dir(ac->device), acpi_ac_seq_show, ac);
	if (!entry)
		return -ENODEV;
	return 0;
}

static int acpi_ac_remove_fs(struct acpi_ac *ac)
{

	if (acpi_device_dir(ac->device)) {
		remove_proc_entry(ACPI_AC_FILE_STATE,
				  acpi_device_dir(ac->device));
		remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
		acpi_device_dir(ac->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));
	/* fall through */
	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(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_battery_notify(struct notifier_block *nb,
				  unsigned long action, void *data)
{
	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	struct acpi_bus_event *event = (struct acpi_bus_event *)data;

	/*
	 * On HP Pavilion dv6-6179er AC status notifications aren't triggered
	 * when adapter is plugged/unplugged. However, battery status
	 * notifcations are triggered when battery starts charging or
	 * discharging. Re-reading AC status triggers lost AC notifications,
	 * if AC status has changed.
	 */
	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	    event->type == ACPI_BATTERY_NOTIFY_STATUS)
		acpi_ac_get_state(ac);

	return NOTIFY_OK;
}

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

static const 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)
{
	struct power_supply_config psy_cfg = {};
	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;

	psy_cfg.drv_data = ac;

	ac->charger_desc.name = acpi_device_bid(device);
#ifdef CONFIG_ACPI_PROCFS_POWER
	result = acpi_ac_add_fs(ac);
	if (result)
		goto end;
#endif
	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	ac->charger_desc.properties = ac_props;
	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	ac->charger_desc.get_property = get_ac_property;
	ac->charger = power_supply_register(&ac->device->dev,
					    &ac->charger_desc, &psy_cfg);
	if (IS_ERR(ac->charger)) {
		result = PTR_ERR(ac->charger);
		goto end;
	}

	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	       acpi_device_name(device), acpi_device_bid(device),
	       ac->state ? "on-line" : "off-line");

	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
	register_acpi_notifier(&ac->battery_nb);
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 = 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;
}
#else
#define acpi_ac_resume NULL
#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);

	power_supply_unregister(ac->charger);
	unregister_acpi_notifier(&ac->battery_nb);

#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_ac_remove_fs(ac);
#endif

	kfree(ac);

	return 0;
}

static int __init acpi_ac_init(void)
{
	unsigned int i;
	int result;

	if (acpi_disabled)
		return -ENODEV;

	for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
		if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
				     acpi_ac_blacklist[i].hrv)) {
			pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
				acpi_ac_blacklist[i].hid);
			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
}
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	*
1da177e4 LT	19	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	20	*/
	21
	22	#include <linux/kernel.h>
	23	#include <linux/module.h>
5a0e3ad6	24	#include <linux/slab.h>
1da177e4 LT	25	#include <linux/init.h>
1da177e4 LT	26	#include <linux/types.h>
0ab5bb64 LT	27	#include <linux/dmi.h>
0ab5bb64 LT	28	#include <linux/delay.h>
e63f6e28 LT	29	#ifdef CONFIG_ACPI_PROCFS_POWER
	30	#include <linux/proc_fs.h>
	31	#include <linux/seq_file.h>
	32	#endif
cc8ef527	33	#include <linux/platform_device.h>
d5b4a3d0	34	#include <linux/power_supply.h>
8b48463f	35	#include <linux/acpi.h>
fa93854f	36	#include <acpi/battery.h>
1da177e4	37
a192a958 LB	38	#define PREFIX "ACPI: "
a192a958 LB	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
e63f6e28	55
98012849 GR	56	static int acpi_ac_add(struct acpi_device *device);
	57	static int acpi_ac_remove(struct acpi_device *device);
	58	static void acpi_ac_notify(struct acpi_device *device, u32 event);
	59
af3ec837 HG	60	struct acpi_ac_bl {
	61	const char *hid;
	62	int hrv;
	63	};
	64
98012849 GR	65	static const struct acpi_device_id ac_device_ids[] = {
	66	{"ACPI0003", 0},
	67	{"", 0},
	68	};
	69	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	70
af3ec837 HG	71	/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
	72	static const struct acpi_ac_bl acpi_ac_blacklist[] = {
	73	{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
	74	{ "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
	75	};
	76
98012849 GR	77	#ifdef CONFIG_PM_SLEEP
	78	static int acpi_ac_resume(struct device *dev);
	79	#endif
	80	static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
	81
e63f6e28 LT	82	#ifdef CONFIG_ACPI_PROCFS_POWER
	83	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
	84	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
e63f6e28 LT	85	#endif
	86
	87
0ab5bb64 LT	88	static int ac_sleep_before_get_state_ms;
0ab5bb64 LT	89
98012849 GR	90	static struct acpi_driver acpi_ac_driver = {
	91	.name = "ac",
	92	.class = ACPI_AC_CLASS,
	93	.ids = ac_device_ids,
	94	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	95	.ops = {
	96	.add = acpi_ac_add,
	97	.remove = acpi_ac_remove,
	98	.notify = acpi_ac_notify,
	99	},
	100	.drv.pm = &acpi_ac_pm,
	101	};
	102
1da177e4	103	struct acpi_ac {
297d716f KK	104	struct power_supply *charger;
297d716f KK	105	struct power_supply_desc charger_desc;
98012849	106	struct acpi_device * device;
27663c58	107	unsigned long long state;
4eee4f03	108	struct notifier_block battery_nb;
1da177e4 LT	109	};
1da177e4 LT	110
297d716f	111	#define to_acpi_ac(x) power_supply_get_drvdata(x)
d5b4a3d0	112
1da177e4 LT	113	/* --------------------------------------------------------------------------
	114	AC Adapter Management
	115	-------------------------------------------------------------------------- */
	116
4be44fcd	117	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	118	{
98012849 GR	119	acpi_status status = AE_OK;
	120
	121	if (!ac)
	122	return -EINVAL;
1da177e4	123
98012849	124	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
cc8ef527	125	&ac->state);
1da177e4	126	if (ACPI_FAILURE(status)) {
cc8ef527 ZR	127	ACPI_EXCEPTION((AE_INFO, status,
cc8ef527 ZR	128	"Error reading AC Adapter state"));
1da177e4	129	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	130	return -ENODEV;
1da177e4	131	}
4be44fcd	132
d550d98d	133	return 0;
1da177e4 LT	134	}
1da177e4 LT	135
3151dbb0 ZR	136	/* --------------------------------------------------------------------------
	137	sysfs I/F
	138	-------------------------------------------------------------------------- */
	139	static int get_ac_property(struct power_supply *psy,
	140	enum power_supply_property psp,
	141	union power_supply_propval *val)
	142	{
	143	struct acpi_ac *ac = to_acpi_ac(psy);
	144
	145	if (!ac)
	146	return -ENODEV;
	147
	148	if (acpi_ac_get_state(ac))
	149	return -ENODEV;
	150
	151	switch (psp) {
	152	case POWER_SUPPLY_PROP_ONLINE:
	153	val->intval = ac->state;
	154	break;
	155	default:
	156	return -EINVAL;
	157	}
	158	return 0;
	159	}
	160
	161	static enum power_supply_property ac_props[] = {
	162	POWER_SUPPLY_PROP_ONLINE,
	163	};
	164
e63f6e28 LT	165	#ifdef CONFIG_ACPI_PROCFS_POWER
	166	/* --------------------------------------------------------------------------
	167	FS Interface (/proc)
	168	-------------------------------------------------------------------------- */
	169
	170	static struct proc_dir_entry *acpi_ac_dir;
	171
	172	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	173	{
	174	struct acpi_ac *ac = seq->private;
	175
	176
	177	if (!ac)
	178	return 0;
	179
	180	if (acpi_ac_get_state(ac)) {
	181	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
	182	return 0;
	183	}
	184
	185	seq_puts(seq, "state: ");
	186	switch (ac->state) {
	187	case ACPI_AC_STATUS_OFFLINE:
	188	seq_puts(seq, "off-line\n");
	189	break;
	190	case ACPI_AC_STATUS_ONLINE:
	191	seq_puts(seq, "on-line\n");
	192	break;
	193	default:
	194	seq_puts(seq, "unknown\n");
	195	break;
	196	}
	197
	198	return 0;
	199	}
	200
e63f6e28 LT	201	static int acpi_ac_add_fs(struct acpi_ac *ac)
	202	{
	203	struct proc_dir_entry *entry = NULL;
	204
	205	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
	206	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	207	if (!acpi_device_dir(ac->device)) {
	208	acpi_device_dir(ac->device) =
	209	proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
	210	if (!acpi_device_dir(ac->device))
	211	return -ENODEV;
	212	}
	213
	214	/* 'state' [R] */
3f3942ac CH	215	entry = proc_create_single_data(ACPI_AC_FILE_STATE, S_IRUGO,
3f3942ac CH	216	acpi_device_dir(ac->device), acpi_ac_seq_show, ac);
e63f6e28 LT	217	if (!entry)
	218	return -ENODEV;
	219	return 0;
	220	}
	221
	222	static int acpi_ac_remove_fs(struct acpi_ac *ac)
	223	{
	224
	225	if (acpi_device_dir(ac->device)) {
	226	remove_proc_entry(ACPI_AC_FILE_STATE,
	227	acpi_device_dir(ac->device));
	228	remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
	229	acpi_device_dir(ac->device) = NULL;
	230	}
	231
	232	return 0;
	233	}
	234	#endif
	235
1da177e4 LT	236	/* --------------------------------------------------------------------------
	237	Driver Model
	238	-------------------------------------------------------------------------- */
	239
98012849	240	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	241	{
98012849	242	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4 LT	243
1da177e4 LT	244	if (!ac)
d550d98d	245	return;
1da177e4	246
1da177e4	247	switch (event) {
f163ff51 LB	248	default:
	249	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	250	"Unsupported event [0x%x]\n", event));
1be9c3a0	251	/* fall through */
1da177e4	252	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	253	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	254	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	255	/*
	256	* A buggy BIOS may notify AC first and then sleep for
	257	* a specific time before doing actual operations in the
	258	* EC event handler (_Qxx). This will cause the AC state
	259	* reported by the ACPI event to be incorrect, so wait for a
	260	* specific time for the EC event handler to make progress.
	261	*/
	262	if (ac_sleep_before_get_state_ms > 0)
	263	msleep(ac_sleep_before_get_state_ms);
	264
1da177e4	265	acpi_ac_get_state(ac);
98012849 GR	266	acpi_bus_generate_netlink_event(device->pnp.device_class,
	267	dev_name(&device->dev), event,
	268	(u32) ac->state);
	269	acpi_notifier_call_chain(device, event, (u32) ac->state);
297d716f	270	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
1da177e4 LT	271	}
1da177e4 LT	272
d550d98d	273	return;
1da177e4 LT	274	}
1da177e4 LT	275
4eee4f03 AM	276	static int acpi_ac_battery_notify(struct notifier_block *nb,
	277	unsigned long action, void *data)
	278	{
	279	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	280	struct acpi_bus_event event = (struct acpi_bus_event )data;
	281
	282	/*
	283	* On HP Pavilion dv6-6179er AC status notifications aren't triggered
	284	* when adapter is plugged/unplugged. However, battery status
	285	* notifcations are triggered when battery starts charging or
	286	* discharging. Re-reading AC status triggers lost AC notifications,
	287	* if AC status has changed.
	288	*/
	289	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	290	event->type == ACPI_BATTERY_NOTIFY_STATUS)
	291	acpi_ac_get_state(ac);
	292
	293	return NOTIFY_OK;
	294	}
	295
0ab5bb64 LT	296	static int thinkpad_e530_quirk(const struct dmi_system_id *d)
	297	{
	298	ac_sleep_before_get_state_ms = 1000;
	299	return 0;
	300	}
	301
44f610cd	302	static const struct dmi_system_id ac_dmi_table[] = {
0ab5bb64 LT	303	{
	304	.callback = thinkpad_e530_quirk,
	305	.ident = "thinkpad e530",
	306	.matches = {
	307	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	308	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	309	},
	310	},
	311	{},
	312	};
	313
98012849	314	static int acpi_ac_add(struct acpi_device *device)
1da177e4	315	{
297d716f	316	struct power_supply_config psy_cfg = {};
4be44fcd	317	int result = 0;
4be44fcd	318	struct acpi_ac *ac = NULL;
1da177e4	319
1da177e4	320
98012849 GR	321	if (!device)
98012849 GR	322	return -EINVAL;
cc8ef527	323
36bcbec7	324	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	325	if (!ac)
d550d98d	326	return -ENOMEM;
1da177e4	327
98012849 GR	328	ac->device = device;
	329	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	330	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	331	device->driver_data = ac;
1da177e4 LT	332
	333	result = acpi_ac_get_state(ac);
	334	if (result)
	335	goto end;
	336
297d716f KK	337	psy_cfg.drv_data = ac;
	338
	339	ac->charger_desc.name = acpi_device_bid(device);
e63f6e28 LT	340	#ifdef CONFIG_ACPI_PROCFS_POWER
	341	result = acpi_ac_add_fs(ac);
	342	if (result)
	343	goto end;
	344	#endif
297d716f KK	345	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	346	ac->charger_desc.properties = ac_props;
	347	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	348	ac->charger_desc.get_property = get_ac_property;
	349	ac->charger = power_supply_register(&ac->device->dev,
	350	&ac->charger_desc, &psy_cfg);
	351	if (IS_ERR(ac->charger)) {
	352	result = PTR_ERR(ac->charger);
f197ac13	353	goto end;
297d716f	354	}
1da177e4	355
4be44fcd	356	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
98012849	357	acpi_device_name(device), acpi_device_bid(device),
4be44fcd	358	ac->state ? "on-line" : "off-line");
1da177e4	359
4eee4f03 AM	360	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
4eee4f03 AM	361	register_acpi_notifier(&ac->battery_nb);
ab0fd674	362	end:
e63f6e28 LT	363	if (result) {
	364	#ifdef CONFIG_ACPI_PROCFS_POWER
	365	acpi_ac_remove_fs(ac);
	366	#endif
1da177e4	367	kfree(ac);
e63f6e28	368	}
1da177e4	369
0ab5bb64	370	dmi_check_system(ac_dmi_table);
d550d98d	371	return result;
1da177e4 LT	372	}
1da177e4 LT	373
90692404	374	#ifdef CONFIG_PM_SLEEP
ccda7069	375	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	376	{
	377	struct acpi_ac *ac;
	378	unsigned old_state;
ccda7069 RW	379
	380	if (!dev)
	381	return -EINVAL;
	382
98012849	383	ac = acpi_driver_data(to_acpi_device(dev));
ccda7069	384	if (!ac)
5bfeca31	385	return -EINVAL;
ccda7069	386
5bfeca31 AS	387	old_state = ac->state;
	388	if (acpi_ac_get_state(ac))
	389	return 0;
	390	if (old_state != ac->state)
297d716f	391	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
5bfeca31 AS	392	return 0;
5bfeca31 AS	393	}
06521c2e SK	394	#else
06521c2e SK	395	#define acpi_ac_resume NULL
90692404	396	#endif
5bfeca31	397
98012849	398	static int acpi_ac_remove(struct acpi_device *device)
1da177e4	399	{
98012849 GR	400	struct acpi_ac *ac = NULL;
98012849 GR	401
1da177e4	402
98012849	403	if (!device \|\| !acpi_driver_data(device))
d550d98d	404	return -EINVAL;
1da177e4	405
98012849	406	ac = acpi_driver_data(device);
1da177e4	407
297d716f	408	power_supply_unregister(ac->charger);
4eee4f03	409	unregister_acpi_notifier(&ac->battery_nb);
cc8ef527	410
e63f6e28 LT	411	#ifdef CONFIG_ACPI_PROCFS_POWER
	412	acpi_ac_remove_fs(ac);
	413	#endif
	414
1da177e4 LT	415	kfree(ac);
1da177e4 LT	416
d550d98d	417	return 0;
1da177e4 LT	418	}
1da177e4 LT	419
4be44fcd	420	static int __init acpi_ac_init(void)
1da177e4	421	{
af3ec837	422	unsigned int i;
3f86b832	423	int result;
1da177e4	424
4d8316d5 PM	425	if (acpi_disabled)
4d8316d5 PM	426	return -ENODEV;
1da177e4	427
af3ec837 HG	428	for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
	429	if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
	430	acpi_ac_blacklist[i].hrv)) {
	431	pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
	432	acpi_ac_blacklist[i].hid);
	433	return -ENODEV;
	434	}
	435
e63f6e28 LT	436	#ifdef CONFIG_ACPI_PROCFS_POWER
	437	acpi_ac_dir = acpi_lock_ac_dir();
	438	if (!acpi_ac_dir)
	439	return -ENODEV;
	440	#endif
	441
	442
98012849	443	result = acpi_bus_register_driver(&acpi_ac_driver);
e63f6e28 LT	444	if (result < 0) {
	445	#ifdef CONFIG_ACPI_PROCFS_POWER
	446	acpi_unlock_ac_dir(acpi_ac_dir);
	447	#endif
d550d98d	448	return -ENODEV;
e63f6e28	449	}
1da177e4	450
d550d98d	451	return 0;
1da177e4 LT	452	}
1da177e4 LT	453
4be44fcd	454	static void __exit acpi_ac_exit(void)
1da177e4	455	{
98012849	456	acpi_bus_unregister_driver(&acpi_ac_driver);
e63f6e28 LT	457	#ifdef CONFIG_ACPI_PROCFS_POWER
	458	acpi_unlock_ac_dir(acpi_ac_dir);
	459	#endif
1da177e4	460	}
1da177e4 LT	461	module_init(acpi_ac_init);
1da177e4 LT	462	module_exit(acpi_ac_exit);