[linux-2.6-block.git] / drivers / acpi / ac.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  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>
 */

#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
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
	4	*
	5	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	6	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
1da177e4 LT	7	*/
	8
	9	#include <linux/kernel.h>
	10	#include <linux/module.h>
5a0e3ad6	11	#include <linux/slab.h>
1da177e4 LT	12	#include <linux/init.h>
1da177e4 LT	13	#include <linux/types.h>
0ab5bb64 LT	14	#include <linux/dmi.h>
0ab5bb64 LT	15	#include <linux/delay.h>
e63f6e28 LT	16	#ifdef CONFIG_ACPI_PROCFS_POWER
	17	#include <linux/proc_fs.h>
	18	#include <linux/seq_file.h>
	19	#endif
cc8ef527	20	#include <linux/platform_device.h>
d5b4a3d0	21	#include <linux/power_supply.h>
8b48463f	22	#include <linux/acpi.h>
fa93854f	23	#include <acpi/battery.h>
1da177e4	24
a192a958 LB	25	#define PREFIX "ACPI: "
a192a958 LB	26
1da177e4	27	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	28	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	29	#define ACPI_AC_FILE_STATE "state"
	30	#define ACPI_AC_NOTIFY_STATUS 0x80
	31	#define ACPI_AC_STATUS_OFFLINE 0x00
	32	#define ACPI_AC_STATUS_ONLINE 0x01
	33	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	34
	35	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	36	ACPI_MODULE_NAME("ac");
1da177e4	37
f52fd66d	38	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	39	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	40	MODULE_LICENSE("GPL");
1da177e4 LT	41
e63f6e28	42
98012849 GR	43	static int acpi_ac_add(struct acpi_device *device);
	44	static int acpi_ac_remove(struct acpi_device *device);
	45	static void acpi_ac_notify(struct acpi_device *device, u32 event);
	46
af3ec837 HG	47	struct acpi_ac_bl {
	48	const char *hid;
	49	int hrv;
	50	};
	51
98012849 GR	52	static const struct acpi_device_id ac_device_ids[] = {
	53	{"ACPI0003", 0},
	54	{"", 0},
	55	};
	56	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	57
af3ec837 HG	58	/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
	59	static const struct acpi_ac_bl acpi_ac_blacklist[] = {
	60	{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
	61	{ "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
	62	};
	63
98012849 GR	64	#ifdef CONFIG_PM_SLEEP
	65	static int acpi_ac_resume(struct device *dev);
	66	#endif
	67	static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
	68
e63f6e28 LT	69	#ifdef CONFIG_ACPI_PROCFS_POWER
	70	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
	71	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
e63f6e28 LT	72	#endif
	73
	74
0ab5bb64	75	static int ac_sleep_before_get_state_ms;
91ea5b1d	76	static int ac_check_pmic = 1;
0ab5bb64	77
98012849 GR	78	static struct acpi_driver acpi_ac_driver = {
	79	.name = "ac",
	80	.class = ACPI_AC_CLASS,
	81	.ids = ac_device_ids,
	82	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	83	.ops = {
	84	.add = acpi_ac_add,
	85	.remove = acpi_ac_remove,
	86	.notify = acpi_ac_notify,
	87	},
	88	.drv.pm = &acpi_ac_pm,
	89	};
	90
1da177e4	91	struct acpi_ac {
297d716f KK	92	struct power_supply *charger;
297d716f KK	93	struct power_supply_desc charger_desc;
98012849	94	struct acpi_device * device;
27663c58	95	unsigned long long state;
4eee4f03	96	struct notifier_block battery_nb;
1da177e4 LT	97	};
1da177e4 LT	98
297d716f	99	#define to_acpi_ac(x) power_supply_get_drvdata(x)
d5b4a3d0	100
1da177e4 LT	101	/* --------------------------------------------------------------------------
	102	AC Adapter Management
	103	-------------------------------------------------------------------------- */
	104
4be44fcd	105	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	106	{
98012849 GR	107	acpi_status status = AE_OK;
	108
	109	if (!ac)
	110	return -EINVAL;
1da177e4	111
98012849	112	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
cc8ef527	113	&ac->state);
1da177e4	114	if (ACPI_FAILURE(status)) {
cc8ef527 ZR	115	ACPI_EXCEPTION((AE_INFO, status,
cc8ef527 ZR	116	"Error reading AC Adapter state"));
1da177e4	117	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	118	return -ENODEV;
1da177e4	119	}
4be44fcd	120
d550d98d	121	return 0;
1da177e4 LT	122	}
1da177e4 LT	123
3151dbb0 ZR	124	/* --------------------------------------------------------------------------
	125	sysfs I/F
	126	-------------------------------------------------------------------------- */
	127	static int get_ac_property(struct power_supply *psy,
	128	enum power_supply_property psp,
	129	union power_supply_propval *val)
	130	{
	131	struct acpi_ac *ac = to_acpi_ac(psy);
	132
	133	if (!ac)
	134	return -ENODEV;
	135
	136	if (acpi_ac_get_state(ac))
	137	return -ENODEV;
	138
	139	switch (psp) {
	140	case POWER_SUPPLY_PROP_ONLINE:
	141	val->intval = ac->state;
	142	break;
	143	default:
	144	return -EINVAL;
	145	}
	146	return 0;
	147	}
	148
	149	static enum power_supply_property ac_props[] = {
	150	POWER_SUPPLY_PROP_ONLINE,
	151	};
	152
e63f6e28 LT	153	#ifdef CONFIG_ACPI_PROCFS_POWER
	154	/* --------------------------------------------------------------------------
	155	FS Interface (/proc)
	156	-------------------------------------------------------------------------- */
	157
	158	static struct proc_dir_entry *acpi_ac_dir;
	159
	160	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	161	{
	162	struct acpi_ac *ac = seq->private;
	163
	164
	165	if (!ac)
	166	return 0;
	167
	168	if (acpi_ac_get_state(ac)) {
	169	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
	170	return 0;
	171	}
	172
	173	seq_puts(seq, "state: ");
	174	switch (ac->state) {
	175	case ACPI_AC_STATUS_OFFLINE:
	176	seq_puts(seq, "off-line\n");
	177	break;
	178	case ACPI_AC_STATUS_ONLINE:
	179	seq_puts(seq, "on-line\n");
	180	break;
	181	default:
	182	seq_puts(seq, "unknown\n");
	183	break;
	184	}
	185
	186	return 0;
	187	}
	188
e63f6e28 LT	189	static int acpi_ac_add_fs(struct acpi_ac *ac)
	190	{
	191	struct proc_dir_entry *entry = NULL;
	192
	193	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
	194	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	195	if (!acpi_device_dir(ac->device)) {
	196	acpi_device_dir(ac->device) =
	197	proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
	198	if (!acpi_device_dir(ac->device))
	199	return -ENODEV;
	200	}
	201
	202	/* 'state' [R] */
3f3942ac CH	203	entry = proc_create_single_data(ACPI_AC_FILE_STATE, S_IRUGO,
3f3942ac CH	204	acpi_device_dir(ac->device), acpi_ac_seq_show, ac);
e63f6e28 LT	205	if (!entry)
	206	return -ENODEV;
	207	return 0;
	208	}
	209
	210	static int acpi_ac_remove_fs(struct acpi_ac *ac)
	211	{
	212
	213	if (acpi_device_dir(ac->device)) {
	214	remove_proc_entry(ACPI_AC_FILE_STATE,
	215	acpi_device_dir(ac->device));
	216	remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
	217	acpi_device_dir(ac->device) = NULL;
	218	}
	219
	220	return 0;
	221	}
	222	#endif
	223
1da177e4 LT	224	/* --------------------------------------------------------------------------
	225	Driver Model
	226	-------------------------------------------------------------------------- */
	227
98012849	228	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	229	{
98012849	230	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4 LT	231
1da177e4 LT	232	if (!ac)
d550d98d	233	return;
1da177e4	234
1da177e4	235	switch (event) {
f163ff51 LB	236	default:
	237	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	238	"Unsupported event [0x%x]\n", event));
1be9c3a0	239	/* fall through */
1da177e4	240	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	241	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	242	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	243	/*
	244	* A buggy BIOS may notify AC first and then sleep for
	245	* a specific time before doing actual operations in the
	246	* EC event handler (_Qxx). This will cause the AC state
	247	* reported by the ACPI event to be incorrect, so wait for a
	248	* specific time for the EC event handler to make progress.
	249	*/
	250	if (ac_sleep_before_get_state_ms > 0)
	251	msleep(ac_sleep_before_get_state_ms);
	252
1da177e4	253	acpi_ac_get_state(ac);
98012849 GR	254	acpi_bus_generate_netlink_event(device->pnp.device_class,
	255	dev_name(&device->dev), event,
	256	(u32) ac->state);
	257	acpi_notifier_call_chain(device, event, (u32) ac->state);
297d716f	258	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
1da177e4 LT	259	}
1da177e4 LT	260
d550d98d	261	return;
1da177e4 LT	262	}
1da177e4 LT	263
4eee4f03 AM	264	static int acpi_ac_battery_notify(struct notifier_block *nb,
	265	unsigned long action, void *data)
	266	{
	267	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	268	struct acpi_bus_event event = (struct acpi_bus_event )data;
	269
	270	/*
	271	* On HP Pavilion dv6-6179er AC status notifications aren't triggered
	272	* when adapter is plugged/unplugged. However, battery status
	273	* notifcations are triggered when battery starts charging or
	274	* discharging. Re-reading AC status triggers lost AC notifications,
	275	* if AC status has changed.
	276	*/
	277	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	278	event->type == ACPI_BATTERY_NOTIFY_STATUS)
	279	acpi_ac_get_state(ac);
	280
	281	return NOTIFY_OK;
	282	}
	283
91ea5b1d	284	static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
0ab5bb64 LT	285	{
	286	ac_sleep_before_get_state_ms = 1000;
	287	return 0;
	288	}
	289
91ea5b1d CC	290	static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
	291	{
	292	ac_check_pmic = 0;
	293	return 0;
	294	}
	295
	296	static const struct dmi_system_id ac_dmi_table[] __initconst = {
0ab5bb64	297	{
6605e342	298	/* Thinkpad e530 */
0ab5bb64	299	.callback = thinkpad_e530_quirk,
0ab5bb64 LT	300	.matches = {
	301	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	302	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	303	},
	304	},
91ea5b1d CC	305	{
	306	/* ECS EF20EA */
	307	.callback = ac_do_not_check_pmic_quirk,
	308	.matches = {
	309	DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
	310	},
	311	},
	312	{
	313	/* Lenovo Ideapad Miix 320 */
	314	.callback = ac_do_not_check_pmic_quirk,
	315	.matches = {
	316	DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	317	DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"),
	318	DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
	319	},
	320	},
0ab5bb64 LT	321	{},
	322	};
	323
98012849	324	static int acpi_ac_add(struct acpi_device *device)
1da177e4	325	{
297d716f	326	struct power_supply_config psy_cfg = {};
4be44fcd	327	int result = 0;
4be44fcd	328	struct acpi_ac *ac = NULL;
1da177e4	329
1da177e4	330
98012849 GR	331	if (!device)
98012849 GR	332	return -EINVAL;
cc8ef527	333
36bcbec7	334	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	335	if (!ac)
d550d98d	336	return -ENOMEM;
1da177e4	337
98012849 GR	338	ac->device = device;
	339	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	340	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	341	device->driver_data = ac;
1da177e4 LT	342
	343	result = acpi_ac_get_state(ac);
	344	if (result)
	345	goto end;
	346
297d716f KK	347	psy_cfg.drv_data = ac;
	348
	349	ac->charger_desc.name = acpi_device_bid(device);
e63f6e28 LT	350	#ifdef CONFIG_ACPI_PROCFS_POWER
	351	result = acpi_ac_add_fs(ac);
	352	if (result)
	353	goto end;
	354	#endif
297d716f KK	355	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	356	ac->charger_desc.properties = ac_props;
	357	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	358	ac->charger_desc.get_property = get_ac_property;
	359	ac->charger = power_supply_register(&ac->device->dev,
	360	&ac->charger_desc, &psy_cfg);
	361	if (IS_ERR(ac->charger)) {
	362	result = PTR_ERR(ac->charger);
f197ac13	363	goto end;
297d716f	364	}
1da177e4	365
4be44fcd	366	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
98012849	367	acpi_device_name(device), acpi_device_bid(device),
4be44fcd	368	ac->state ? "on-line" : "off-line");
1da177e4	369
4eee4f03 AM	370	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
4eee4f03 AM	371	register_acpi_notifier(&ac->battery_nb);
ab0fd674	372	end:
e63f6e28 LT	373	if (result) {
	374	#ifdef CONFIG_ACPI_PROCFS_POWER
	375	acpi_ac_remove_fs(ac);
	376	#endif
1da177e4	377	kfree(ac);
e63f6e28	378	}
1da177e4	379
d550d98d	380	return result;
1da177e4 LT	381	}
1da177e4 LT	382
90692404	383	#ifdef CONFIG_PM_SLEEP
ccda7069	384	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	385	{
	386	struct acpi_ac *ac;
	387	unsigned old_state;
ccda7069 RW	388
	389	if (!dev)
	390	return -EINVAL;
	391
98012849	392	ac = acpi_driver_data(to_acpi_device(dev));
ccda7069	393	if (!ac)
5bfeca31	394	return -EINVAL;
ccda7069	395
5bfeca31 AS	396	old_state = ac->state;
	397	if (acpi_ac_get_state(ac))
	398	return 0;
	399	if (old_state != ac->state)
297d716f	400	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
5bfeca31 AS	401	return 0;
5bfeca31 AS	402	}
06521c2e SK	403	#else
06521c2e SK	404	#define acpi_ac_resume NULL
90692404	405	#endif
5bfeca31	406
98012849	407	static int acpi_ac_remove(struct acpi_device *device)
1da177e4	408	{
98012849 GR	409	struct acpi_ac *ac = NULL;
98012849 GR	410
1da177e4	411
98012849	412	if (!device \|\| !acpi_driver_data(device))
d550d98d	413	return -EINVAL;
1da177e4	414
98012849	415	ac = acpi_driver_data(device);
1da177e4	416
297d716f	417	power_supply_unregister(ac->charger);
4eee4f03	418	unregister_acpi_notifier(&ac->battery_nb);
cc8ef527	419
e63f6e28 LT	420	#ifdef CONFIG_ACPI_PROCFS_POWER
	421	acpi_ac_remove_fs(ac);
	422	#endif
	423
1da177e4 LT	424	kfree(ac);
1da177e4 LT	425
d550d98d	426	return 0;
1da177e4 LT	427	}
1da177e4 LT	428
4be44fcd	429	static int __init acpi_ac_init(void)
1da177e4	430	{
af3ec837	431	unsigned int i;
3f86b832	432	int result;
1da177e4	433
4d8316d5 PM	434	if (acpi_disabled)
4d8316d5 PM	435	return -ENODEV;
1da177e4	436
91ea5b1d CC	437	dmi_check_system(ac_dmi_table);
	438
	439	if (ac_check_pmic) {
	440	for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
	441	if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
	442	acpi_ac_blacklist[i].hrv)) {
	443	pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
	444	acpi_ac_blacklist[i].hid);
	445	return -ENODEV;
	446	}
	447	}
af3ec837	448
e63f6e28 LT	449	#ifdef CONFIG_ACPI_PROCFS_POWER
	450	acpi_ac_dir = acpi_lock_ac_dir();
	451	if (!acpi_ac_dir)
	452	return -ENODEV;
	453	#endif
	454
	455
98012849	456	result = acpi_bus_register_driver(&acpi_ac_driver);
e63f6e28 LT	457	if (result < 0) {
	458	#ifdef CONFIG_ACPI_PROCFS_POWER
	459	acpi_unlock_ac_dir(acpi_ac_dir);
	460	#endif
d550d98d	461	return -ENODEV;
e63f6e28	462	}
1da177e4	463
d550d98d	464	return 0;
1da177e4 LT	465	}
1da177e4 LT	466
4be44fcd	467	static void __exit acpi_ac_exit(void)
1da177e4	468	{
98012849	469	acpi_bus_unregister_driver(&acpi_ac_driver);
e63f6e28 LT	470	#ifdef CONFIG_ACPI_PROCFS_POWER
	471	acpi_unlock_ac_dir(acpi_ac_dir);
	472	#endif
1da177e4	473	}
1da177e4 LT	474	module_init(acpi_ac_init);
1da177e4 LT	475	module_exit(acpi_ac_exit);