[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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#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 "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);
static int acpi_ac_open_fs(struct inode *inode, struct file *file);
#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)

#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_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_data(ACPI_AC_FILE_STATE,
				 S_IRUGO, acpi_device_dir(ac->device),
				 &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->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));
	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>
4eee4f03	36	#include "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);
	85	static int acpi_ac_open_fs(struct inode inode, struct file file);
	86	#endif
	87
	88
0ab5bb64 LT	89	static int ac_sleep_before_get_state_ms;
0ab5bb64 LT	90
98012849 GR	91	static struct acpi_driver acpi_ac_driver = {
	92	.name = "ac",
	93	.class = ACPI_AC_CLASS,
	94	.ids = ac_device_ids,
	95	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	96	.ops = {
	97	.add = acpi_ac_add,
	98	.remove = acpi_ac_remove,
	99	.notify = acpi_ac_notify,
	100	},
	101	.drv.pm = &acpi_ac_pm,
	102	};
	103
1da177e4	104	struct acpi_ac {
297d716f KK	105	struct power_supply *charger;
297d716f KK	106	struct power_supply_desc charger_desc;
98012849	107	struct acpi_device * device;
27663c58	108	unsigned long long state;
4eee4f03	109	struct notifier_block battery_nb;
1da177e4 LT	110	};
1da177e4 LT	111
297d716f	112	#define to_acpi_ac(x) power_supply_get_drvdata(x)
d5b4a3d0	113
e63f6e28 LT	114	#ifdef CONFIG_ACPI_PROCFS_POWER
	115	static const struct file_operations acpi_ac_fops = {
	116	.owner = THIS_MODULE,
	117	.open = acpi_ac_open_fs,
	118	.read = seq_read,
	119	.llseek = seq_lseek,
	120	.release = single_release,
	121	};
	122	#endif
	123
1da177e4 LT	124	/* --------------------------------------------------------------------------
	125	AC Adapter Management
	126	-------------------------------------------------------------------------- */
	127
4be44fcd	128	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	129	{
98012849 GR	130	acpi_status status = AE_OK;
	131
	132	if (!ac)
	133	return -EINVAL;
1da177e4	134
98012849	135	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
cc8ef527	136	&ac->state);
1da177e4	137	if (ACPI_FAILURE(status)) {
cc8ef527 ZR	138	ACPI_EXCEPTION((AE_INFO, status,
cc8ef527 ZR	139	"Error reading AC Adapter state"));
1da177e4	140	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	141	return -ENODEV;
1da177e4	142	}
4be44fcd	143
d550d98d	144	return 0;
1da177e4 LT	145	}
1da177e4 LT	146
3151dbb0 ZR	147	/* --------------------------------------------------------------------------
	148	sysfs I/F
	149	-------------------------------------------------------------------------- */
	150	static int get_ac_property(struct power_supply *psy,
	151	enum power_supply_property psp,
	152	union power_supply_propval *val)
	153	{
	154	struct acpi_ac *ac = to_acpi_ac(psy);
	155
	156	if (!ac)
	157	return -ENODEV;
	158
	159	if (acpi_ac_get_state(ac))
	160	return -ENODEV;
	161
	162	switch (psp) {
	163	case POWER_SUPPLY_PROP_ONLINE:
	164	val->intval = ac->state;
	165	break;
	166	default:
	167	return -EINVAL;
	168	}
	169	return 0;
	170	}
	171
	172	static enum power_supply_property ac_props[] = {
	173	POWER_SUPPLY_PROP_ONLINE,
	174	};
	175
e63f6e28 LT	176	#ifdef CONFIG_ACPI_PROCFS_POWER
	177	/* --------------------------------------------------------------------------
	178	FS Interface (/proc)
	179	-------------------------------------------------------------------------- */
	180
	181	static struct proc_dir_entry *acpi_ac_dir;
	182
	183	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	184	{
	185	struct acpi_ac *ac = seq->private;
	186
	187
	188	if (!ac)
	189	return 0;
	190
	191	if (acpi_ac_get_state(ac)) {
	192	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
	193	return 0;
	194	}
	195
	196	seq_puts(seq, "state: ");
	197	switch (ac->state) {
	198	case ACPI_AC_STATUS_OFFLINE:
	199	seq_puts(seq, "off-line\n");
	200	break;
	201	case ACPI_AC_STATUS_ONLINE:
	202	seq_puts(seq, "on-line\n");
	203	break;
	204	default:
	205	seq_puts(seq, "unknown\n");
	206	break;
	207	}
	208
	209	return 0;
	210	}
	211
	212	static int acpi_ac_open_fs(struct inode inode, struct file file)
	213	{
	214	return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
	215	}
	216
	217	static int acpi_ac_add_fs(struct acpi_ac *ac)
	218	{
	219	struct proc_dir_entry *entry = NULL;
	220
	221	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
	222	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	223	if (!acpi_device_dir(ac->device)) {
	224	acpi_device_dir(ac->device) =
	225	proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
	226	if (!acpi_device_dir(ac->device))
	227	return -ENODEV;
	228	}
	229
	230	/* 'state' [R] */
	231	entry = proc_create_data(ACPI_AC_FILE_STATE,
	232	S_IRUGO, acpi_device_dir(ac->device),
	233	&acpi_ac_fops, ac);
	234	if (!entry)
	235	return -ENODEV;
	236	return 0;
	237	}
	238
	239	static int acpi_ac_remove_fs(struct acpi_ac *ac)
240	{
241
242	if (acpi_device_dir(ac->device)) {
243	remove_proc_entry(ACPI_AC_FILE_STATE,
244	acpi_device_dir(ac->device));
245	remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
246	acpi_device_dir(ac->device) = NULL;
247	}
248
249	return 0;
250	}
251	#endif
252
1da177e4 LT	253	/* --------------------------------------------------------------------------
	254	Driver Model
	255	-------------------------------------------------------------------------- */
	256
98012849	257	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	258	{
98012849	259	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4 LT	260
1da177e4 LT	261	if (!ac)
d550d98d	262	return;
1da177e4	263
1da177e4	264	switch (event) {
f163ff51 LB	265	default:
	266	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	267	"Unsupported event [0x%x]\n", event));
1da177e4	268	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	269	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	270	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	271	/*
	272	* A buggy BIOS may notify AC first and then sleep for
	273	* a specific time before doing actual operations in the
	274	* EC event handler (_Qxx). This will cause the AC state
	275	* reported by the ACPI event to be incorrect, so wait for a
	276	* specific time for the EC event handler to make progress.
	277	*/
	278	if (ac_sleep_before_get_state_ms > 0)
	279	msleep(ac_sleep_before_get_state_ms);
	280
1da177e4	281	acpi_ac_get_state(ac);
98012849 GR	282	acpi_bus_generate_netlink_event(device->pnp.device_class,
	283	dev_name(&device->dev), event,
	284	(u32) ac->state);
	285	acpi_notifier_call_chain(device, event, (u32) ac->state);
297d716f	286	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
1da177e4 LT	287	}
1da177e4 LT	288
d550d98d	289	return;
1da177e4 LT	290	}
1da177e4 LT	291
4eee4f03 AM	292	static int acpi_ac_battery_notify(struct notifier_block *nb,
	293	unsigned long action, void *data)
	294	{
	295	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	296	struct acpi_bus_event event = (struct acpi_bus_event )data;
	297
	298	/*
	299	* On HP Pavilion dv6-6179er AC status notifications aren't triggered
	300	* when adapter is plugged/unplugged. However, battery status
	301	* notifcations are triggered when battery starts charging or
	302	* discharging. Re-reading AC status triggers lost AC notifications,
	303	* if AC status has changed.
	304	*/
	305	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	306	event->type == ACPI_BATTERY_NOTIFY_STATUS)
	307	acpi_ac_get_state(ac);
	308
	309	return NOTIFY_OK;
	310	}
	311
0ab5bb64 LT	312	static int thinkpad_e530_quirk(const struct dmi_system_id *d)
	313	{
	314	ac_sleep_before_get_state_ms = 1000;
	315	return 0;
	316	}
	317
44f610cd	318	static const struct dmi_system_id ac_dmi_table[] = {
0ab5bb64 LT	319	{
	320	.callback = thinkpad_e530_quirk,
	321	.ident = "thinkpad e530",
	322	.matches = {
	323	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	324	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	325	},
	326	},
	327	{},
	328	};
	329
98012849	330	static int acpi_ac_add(struct acpi_device *device)
1da177e4	331	{
297d716f	332	struct power_supply_config psy_cfg = {};
4be44fcd	333	int result = 0;
4be44fcd	334	struct acpi_ac *ac = NULL;
1da177e4	335
1da177e4	336
98012849 GR	337	if (!device)
98012849 GR	338	return -EINVAL;
cc8ef527	339
36bcbec7	340	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	341	if (!ac)
d550d98d	342	return -ENOMEM;
1da177e4	343
98012849 GR	344	ac->device = device;
	345	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	346	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	347	device->driver_data = ac;
1da177e4 LT	348
	349	result = acpi_ac_get_state(ac);
	350	if (result)
	351	goto end;
	352
297d716f KK	353	psy_cfg.drv_data = ac;
	354
	355	ac->charger_desc.name = acpi_device_bid(device);
e63f6e28 LT	356	#ifdef CONFIG_ACPI_PROCFS_POWER
	357	result = acpi_ac_add_fs(ac);
	358	if (result)
	359	goto end;
	360	#endif
297d716f KK	361	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	362	ac->charger_desc.properties = ac_props;
	363	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	364	ac->charger_desc.get_property = get_ac_property;
	365	ac->charger = power_supply_register(&ac->device->dev,
	366	&ac->charger_desc, &psy_cfg);
	367	if (IS_ERR(ac->charger)) {
	368	result = PTR_ERR(ac->charger);
f197ac13	369	goto end;
297d716f	370	}
1da177e4	371
4be44fcd	372	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
98012849	373	acpi_device_name(device), acpi_device_bid(device),
4be44fcd	374	ac->state ? "on-line" : "off-line");
1da177e4	375
4eee4f03 AM	376	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
4eee4f03 AM	377	register_acpi_notifier(&ac->battery_nb);
ab0fd674	378	end:
e63f6e28 LT	379	if (result) {
	380	#ifdef CONFIG_ACPI_PROCFS_POWER
	381	acpi_ac_remove_fs(ac);
	382	#endif
1da177e4	383	kfree(ac);
e63f6e28	384	}
1da177e4	385
0ab5bb64	386	dmi_check_system(ac_dmi_table);
d550d98d	387	return result;
1da177e4 LT	388	}
1da177e4 LT	389
90692404	390	#ifdef CONFIG_PM_SLEEP
ccda7069	391	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	392	{
	393	struct acpi_ac *ac;
	394	unsigned old_state;
ccda7069 RW	395
	396	if (!dev)
	397	return -EINVAL;
	398
98012849	399	ac = acpi_driver_data(to_acpi_device(dev));
ccda7069	400	if (!ac)
5bfeca31	401	return -EINVAL;
ccda7069	402
5bfeca31 AS	403	old_state = ac->state;
	404	if (acpi_ac_get_state(ac))
	405	return 0;
	406	if (old_state != ac->state)
297d716f	407	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
5bfeca31 AS	408	return 0;
5bfeca31 AS	409	}
06521c2e SK	410	#else
06521c2e SK	411	#define acpi_ac_resume NULL
90692404	412	#endif
5bfeca31	413
98012849	414	static int acpi_ac_remove(struct acpi_device *device)
1da177e4	415	{
98012849 GR	416	struct acpi_ac *ac = NULL;
98012849 GR	417
1da177e4	418
98012849	419	if (!device \|\| !acpi_driver_data(device))
d550d98d	420	return -EINVAL;
1da177e4	421
98012849	422	ac = acpi_driver_data(device);
1da177e4	423
297d716f	424	power_supply_unregister(ac->charger);
4eee4f03	425	unregister_acpi_notifier(&ac->battery_nb);
cc8ef527	426
e63f6e28 LT	427	#ifdef CONFIG_ACPI_PROCFS_POWER
	428	acpi_ac_remove_fs(ac);
	429	#endif
	430
1da177e4 LT	431	kfree(ac);
1da177e4 LT	432
d550d98d	433	return 0;
1da177e4 LT	434	}
1da177e4 LT	435
4be44fcd	436	static int __init acpi_ac_init(void)
1da177e4	437	{
af3ec837	438	unsigned int i;
3f86b832	439	int result;
1da177e4	440
4d8316d5 PM	441	if (acpi_disabled)
4d8316d5 PM	442	return -ENODEV;
1da177e4	443
af3ec837 HG	444	for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
	445	if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
	446	acpi_ac_blacklist[i].hrv)) {
	447	pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
	448	acpi_ac_blacklist[i].hid);
	449	return -ENODEV;
	450	}
	451
e63f6e28 LT	452	#ifdef CONFIG_ACPI_PROCFS_POWER
	453	acpi_ac_dir = acpi_lock_ac_dir();
	454	if (!acpi_ac_dir)
	455	return -ENODEV;
	456	#endif
	457
	458
98012849	459	result = acpi_bus_register_driver(&acpi_ac_driver);
e63f6e28 LT	460	if (result < 0) {
	461	#ifdef CONFIG_ACPI_PROCFS_POWER
	462	acpi_unlock_ac_dir(acpi_ac_dir);
	463	#endif
d550d98d	464	return -ENODEV;
e63f6e28	465	}
1da177e4	466
d550d98d	467	return 0;
1da177e4 LT	468	}
1da177e4 LT	469
4be44fcd	470	static void __exit acpi_ac_exit(void)
1da177e4	471	{
98012849	472	acpi_bus_unregister_driver(&acpi_ac_driver);
e63f6e28 LT	473	#ifdef CONFIG_ACPI_PROCFS_POWER
	474	acpi_unlock_ac_dir(acpi_ac_dir);
	475	#endif
1da177e4	476	}
1da177e4 LT	477	module_init(acpi_ac_init);
1da177e4 LT	478	module_exit(acpi_ac_exit);