[linux-2.6-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 int ac_check_pmic = 1;

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

static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
{
	ac_check_pmic = 0;
	return 0;
}

static const struct dmi_system_id ac_dmi_table[]  __initconst = {
	{
	/* Thinkpad e530 */
	.callback = thinkpad_e530_quirk,
	.matches = {
		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
		DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
		},
	},
	{
		/* ECS EF20EA */
		.callback = ac_do_not_check_pmic_quirk,
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
		},
	},
	{
		/* Lenovo Ideapad Miix 320 */
		.callback = ac_do_not_check_pmic_quirk,
		.matches = {
		  DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
		  DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"),
		  DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
		},
	},
	{},
};

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);
	}

	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;

	dmi_check_system(ac_dmi_table);

	if (ac_check_pmic) {
		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	88	static int ac_sleep_before_get_state_ms;
91ea5b1d	89	static int ac_check_pmic = 1;
0ab5bb64	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
1da177e4 LT	114	/* --------------------------------------------------------------------------
	115	AC Adapter Management
	116	-------------------------------------------------------------------------- */
	117
4be44fcd	118	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	119	{
98012849 GR	120	acpi_status status = AE_OK;
	121
	122	if (!ac)
	123	return -EINVAL;
1da177e4	124
98012849	125	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
cc8ef527	126	&ac->state);
1da177e4	127	if (ACPI_FAILURE(status)) {
cc8ef527 ZR	128	ACPI_EXCEPTION((AE_INFO, status,
cc8ef527 ZR	129	"Error reading AC Adapter state"));
1da177e4	130	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	131	return -ENODEV;
1da177e4	132	}
4be44fcd	133
d550d98d	134	return 0;
1da177e4 LT	135	}
1da177e4 LT	136
3151dbb0 ZR	137	/* --------------------------------------------------------------------------
	138	sysfs I/F
	139	-------------------------------------------------------------------------- */
	140	static int get_ac_property(struct power_supply *psy,
	141	enum power_supply_property psp,
	142	union power_supply_propval *val)
	143	{
	144	struct acpi_ac *ac = to_acpi_ac(psy);
	145
	146	if (!ac)
	147	return -ENODEV;
	148
	149	if (acpi_ac_get_state(ac))
	150	return -ENODEV;
	151
	152	switch (psp) {
	153	case POWER_SUPPLY_PROP_ONLINE:
	154	val->intval = ac->state;
	155	break;
	156	default:
	157	return -EINVAL;
	158	}
	159	return 0;
	160	}
	161
	162	static enum power_supply_property ac_props[] = {
	163	POWER_SUPPLY_PROP_ONLINE,
	164	};
	165
e63f6e28 LT	166	#ifdef CONFIG_ACPI_PROCFS_POWER
	167	/* --------------------------------------------------------------------------
	168	FS Interface (/proc)
	169	-------------------------------------------------------------------------- */
	170
	171	static struct proc_dir_entry *acpi_ac_dir;
	172
	173	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	174	{
	175	struct acpi_ac *ac = seq->private;
	176
	177
	178	if (!ac)
	179	return 0;
	180
	181	if (acpi_ac_get_state(ac)) {
	182	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
	183	return 0;
	184	}
	185
	186	seq_puts(seq, "state: ");
	187	switch (ac->state) {
	188	case ACPI_AC_STATUS_OFFLINE:
	189	seq_puts(seq, "off-line\n");
	190	break;
	191	case ACPI_AC_STATUS_ONLINE:
	192	seq_puts(seq, "on-line\n");
	193	break;
	194	default:
	195	seq_puts(seq, "unknown\n");
	196	break;
	197	}
	198
	199	return 0;
	200	}
	201
e63f6e28 LT	202	static int acpi_ac_add_fs(struct acpi_ac *ac)
	203	{
	204	struct proc_dir_entry *entry = NULL;
	205
	206	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
	207	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	208	if (!acpi_device_dir(ac->device)) {
	209	acpi_device_dir(ac->device) =
	210	proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
	211	if (!acpi_device_dir(ac->device))
	212	return -ENODEV;
	213	}
	214
	215	/* 'state' [R] */
3f3942ac CH	216	entry = proc_create_single_data(ACPI_AC_FILE_STATE, S_IRUGO,
3f3942ac CH	217	acpi_device_dir(ac->device), acpi_ac_seq_show, ac);
e63f6e28 LT	218	if (!entry)
	219	return -ENODEV;
	220	return 0;
	221	}
	222
	223	static int acpi_ac_remove_fs(struct acpi_ac *ac)
	224	{
	225
	226	if (acpi_device_dir(ac->device)) {
	227	remove_proc_entry(ACPI_AC_FILE_STATE,
	228	acpi_device_dir(ac->device));
	229	remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
	230	acpi_device_dir(ac->device) = NULL;
	231	}
	232
	233	return 0;
	234	}
	235	#endif
	236
1da177e4 LT	237	/* --------------------------------------------------------------------------
	238	Driver Model
	239	-------------------------------------------------------------------------- */
	240
98012849	241	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	242	{
98012849	243	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4 LT	244
1da177e4 LT	245	if (!ac)
d550d98d	246	return;
1da177e4	247
1da177e4	248	switch (event) {
f163ff51 LB	249	default:
	250	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	251	"Unsupported event [0x%x]\n", event));
1be9c3a0	252	/* fall through */
1da177e4	253	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	254	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	255	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	256	/*
	257	* A buggy BIOS may notify AC first and then sleep for
	258	* a specific time before doing actual operations in the
	259	* EC event handler (_Qxx). This will cause the AC state
	260	* reported by the ACPI event to be incorrect, so wait for a
	261	* specific time for the EC event handler to make progress.
	262	*/
	263	if (ac_sleep_before_get_state_ms > 0)
	264	msleep(ac_sleep_before_get_state_ms);
	265
1da177e4	266	acpi_ac_get_state(ac);
98012849 GR	267	acpi_bus_generate_netlink_event(device->pnp.device_class,
	268	dev_name(&device->dev), event,
	269	(u32) ac->state);
	270	acpi_notifier_call_chain(device, event, (u32) ac->state);
297d716f	271	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
1da177e4 LT	272	}
1da177e4 LT	273
d550d98d	274	return;
1da177e4 LT	275	}
1da177e4 LT	276
4eee4f03 AM	277	static int acpi_ac_battery_notify(struct notifier_block *nb,
	278	unsigned long action, void *data)
	279	{
	280	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	281	struct acpi_bus_event event = (struct acpi_bus_event )data;
	282
	283	/*
	284	* On HP Pavilion dv6-6179er AC status notifications aren't triggered
	285	* when adapter is plugged/unplugged. However, battery status
	286	* notifcations are triggered when battery starts charging or
	287	* discharging. Re-reading AC status triggers lost AC notifications,
	288	* if AC status has changed.
	289	*/
	290	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	291	event->type == ACPI_BATTERY_NOTIFY_STATUS)
	292	acpi_ac_get_state(ac);
	293
	294	return NOTIFY_OK;
	295	}
	296
91ea5b1d	297	static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
0ab5bb64 LT	298	{
	299	ac_sleep_before_get_state_ms = 1000;
	300	return 0;
	301	}
	302
91ea5b1d CC	303	static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
	304	{
	305	ac_check_pmic = 0;
	306	return 0;
	307	}
	308
	309	static const struct dmi_system_id ac_dmi_table[] __initconst = {
0ab5bb64	310	{
6605e342	311	/* Thinkpad e530 */
0ab5bb64	312	.callback = thinkpad_e530_quirk,
0ab5bb64 LT	313	.matches = {
	314	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	315	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	316	},
	317	},
91ea5b1d CC	318	{
	319	/* ECS EF20EA */
	320	.callback = ac_do_not_check_pmic_quirk,
	321	.matches = {
	322	DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
	323	},
	324	},
	325	{
	326	/* Lenovo Ideapad Miix 320 */
	327	.callback = ac_do_not_check_pmic_quirk,
	328	.matches = {
	329	DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	330	DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"),
	331	DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
	332	},
	333	},
0ab5bb64 LT	334	{},
	335	};
	336
98012849	337	static int acpi_ac_add(struct acpi_device *device)
1da177e4	338	{
297d716f	339	struct power_supply_config psy_cfg = {};
4be44fcd	340	int result = 0;
4be44fcd	341	struct acpi_ac *ac = NULL;
1da177e4	342
1da177e4	343
98012849 GR	344	if (!device)
98012849 GR	345	return -EINVAL;
cc8ef527	346
36bcbec7	347	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	348	if (!ac)
d550d98d	349	return -ENOMEM;
1da177e4	350
98012849 GR	351	ac->device = device;
	352	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	353	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	354	device->driver_data = ac;
1da177e4 LT	355
	356	result = acpi_ac_get_state(ac);
	357	if (result)
	358	goto end;
	359
297d716f KK	360	psy_cfg.drv_data = ac;
	361
	362	ac->charger_desc.name = acpi_device_bid(device);
e63f6e28 LT	363	#ifdef CONFIG_ACPI_PROCFS_POWER
	364	result = acpi_ac_add_fs(ac);
	365	if (result)
	366	goto end;
	367	#endif
297d716f KK	368	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	369	ac->charger_desc.properties = ac_props;
	370	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	371	ac->charger_desc.get_property = get_ac_property;
	372	ac->charger = power_supply_register(&ac->device->dev,
	373	&ac->charger_desc, &psy_cfg);
	374	if (IS_ERR(ac->charger)) {
	375	result = PTR_ERR(ac->charger);
f197ac13	376	goto end;
297d716f	377	}
1da177e4	378
4be44fcd	379	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
98012849	380	acpi_device_name(device), acpi_device_bid(device),
4be44fcd	381	ac->state ? "on-line" : "off-line");
1da177e4	382
4eee4f03 AM	383	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
4eee4f03 AM	384	register_acpi_notifier(&ac->battery_nb);
ab0fd674	385	end:
e63f6e28 LT	386	if (result) {
	387	#ifdef CONFIG_ACPI_PROCFS_POWER
	388	acpi_ac_remove_fs(ac);
	389	#endif
1da177e4	390	kfree(ac);
e63f6e28	391	}
1da177e4	392
d550d98d	393	return result;
1da177e4 LT	394	}
1da177e4 LT	395
90692404	396	#ifdef CONFIG_PM_SLEEP
ccda7069	397	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	398	{
	399	struct acpi_ac *ac;
	400	unsigned old_state;
ccda7069 RW	401
	402	if (!dev)
	403	return -EINVAL;
	404
98012849	405	ac = acpi_driver_data(to_acpi_device(dev));
ccda7069	406	if (!ac)
5bfeca31	407	return -EINVAL;
ccda7069	408
5bfeca31 AS	409	old_state = ac->state;
	410	if (acpi_ac_get_state(ac))
	411	return 0;
	412	if (old_state != ac->state)
297d716f	413	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
5bfeca31 AS	414	return 0;
5bfeca31 AS	415	}
06521c2e SK	416	#else
06521c2e SK	417	#define acpi_ac_resume NULL
90692404	418	#endif
5bfeca31	419
98012849	420	static int acpi_ac_remove(struct acpi_device *device)
1da177e4	421	{
98012849 GR	422	struct acpi_ac *ac = NULL;
98012849 GR	423
1da177e4	424
98012849	425	if (!device \|\| !acpi_driver_data(device))
d550d98d	426	return -EINVAL;
1da177e4	427
98012849	428	ac = acpi_driver_data(device);
1da177e4	429
297d716f	430	power_supply_unregister(ac->charger);
4eee4f03	431	unregister_acpi_notifier(&ac->battery_nb);
cc8ef527	432
e63f6e28 LT	433	#ifdef CONFIG_ACPI_PROCFS_POWER
	434	acpi_ac_remove_fs(ac);
	435	#endif
	436
1da177e4 LT	437	kfree(ac);
1da177e4 LT	438
d550d98d	439	return 0;
1da177e4 LT	440	}
1da177e4 LT	441
4be44fcd	442	static int __init acpi_ac_init(void)
1da177e4	443	{
af3ec837	444	unsigned int i;
3f86b832	445	int result;
1da177e4	446
4d8316d5 PM	447	if (acpi_disabled)
4d8316d5 PM	448	return -ENODEV;
1da177e4	449
91ea5b1d CC	450	dmi_check_system(ac_dmi_table);
	451
	452	if (ac_check_pmic) {
	453	for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
	454	if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
	455	acpi_ac_blacklist[i].hrv)) {
	456	pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
	457	acpi_ac_blacklist[i].hid);
	458	return -ENODEV;
	459	}
	460	}
af3ec837	461
e63f6e28 LT	462	#ifdef CONFIG_ACPI_PROCFS_POWER
	463	acpi_ac_dir = acpi_lock_ac_dir();
	464	if (!acpi_ac_dir)
	465	return -ENODEV;
	466	#endif
	467
	468
98012849	469	result = acpi_bus_register_driver(&acpi_ac_driver);
e63f6e28 LT	470	if (result < 0) {
	471	#ifdef CONFIG_ACPI_PROCFS_POWER
	472	acpi_unlock_ac_dir(acpi_ac_dir);
	473	#endif
d550d98d	474	return -ENODEV;
e63f6e28	475	}
1da177e4	476
d550d98d	477	return 0;
1da177e4 LT	478	}
1da177e4 LT	479
4be44fcd	480	static void __exit acpi_ac_exit(void)
1da177e4	481	{
98012849	482	acpi_bus_unregister_driver(&acpi_ac_driver);
e63f6e28 LT	483	#ifdef CONFIG_ACPI_PROCFS_POWER
	484	acpi_unlock_ac_dir(acpi_ac_dir);
	485	#endif
1da177e4	486	}
1da177e4 LT	487	module_init(acpi_ac_init);
1da177e4 LT	488	module_exit(acpi_ac_exit);