[mirror_ubuntu-zesty-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);

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

#ifdef CONFIG_PM_SLEEP
static int acpi_ac_resume(struct device *dev);
#endif
static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);

#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)
{
	int result;

	if (acpi_disabled)
		return -ENODEV;

#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_ac_dir = acpi_lock_ac_dir();
	if (!acpi_ac_dir)
		return -ENODEV;
#endif


	result = acpi_bus_register_driver(&acpi_ac_driver);
	if (result < 0) {
#ifdef CONFIG_ACPI_PROCFS_POWER
		acpi_unlock_ac_dir(acpi_ac_dir);
#endif
		return -ENODEV;
	}

	return 0;
}

static void __exit acpi_ac_exit(void)
{
	acpi_bus_unregister_driver(&acpi_ac_driver);
#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_unlock_ac_dir(acpi_ac_dir);
#endif
}
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
	60	static const struct acpi_device_id ac_device_ids[] = {
	61	{"ACPI0003", 0},
	62	{"", 0},
	63	};
	64	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	65
	66	#ifdef CONFIG_PM_SLEEP
	67	static int acpi_ac_resume(struct device *dev);
	68	#endif
	69	static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
	70
e63f6e28 LT	71	#ifdef CONFIG_ACPI_PROCFS_POWER
	72	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
	73	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
	74	static int acpi_ac_open_fs(struct inode inode, struct file file);
	75	#endif
	76
	77
0ab5bb64 LT	78	static int ac_sleep_before_get_state_ms;
0ab5bb64 LT	79
98012849 GR	80	static struct acpi_driver acpi_ac_driver = {
	81	.name = "ac",
	82	.class = ACPI_AC_CLASS,
	83	.ids = ac_device_ids,
	84	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	85	.ops = {
	86	.add = acpi_ac_add,
	87	.remove = acpi_ac_remove,
	88	.notify = acpi_ac_notify,
	89	},
	90	.drv.pm = &acpi_ac_pm,
	91	};
	92
1da177e4	93	struct acpi_ac {
297d716f KK	94	struct power_supply *charger;
297d716f KK	95	struct power_supply_desc charger_desc;
98012849	96	struct acpi_device * device;
27663c58	97	unsigned long long state;
4eee4f03	98	struct notifier_block battery_nb;
1da177e4 LT	99	};
1da177e4 LT	100
297d716f	101	#define to_acpi_ac(x) power_supply_get_drvdata(x)
d5b4a3d0	102
e63f6e28 LT	103	#ifdef CONFIG_ACPI_PROCFS_POWER
	104	static const struct file_operations acpi_ac_fops = {
	105	.owner = THIS_MODULE,
	106	.open = acpi_ac_open_fs,
	107	.read = seq_read,
	108	.llseek = seq_lseek,
	109	.release = single_release,
	110	};
	111	#endif
	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
	201	static int acpi_ac_open_fs(struct inode inode, struct file file)
	202	{
	203	return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
	204	}
	205
	206	static int acpi_ac_add_fs(struct acpi_ac *ac)
	207	{
	208	struct proc_dir_entry *entry = NULL;
	209
	210	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
	211	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	212	if (!acpi_device_dir(ac->device)) {
	213	acpi_device_dir(ac->device) =
	214	proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
	215	if (!acpi_device_dir(ac->device))
	216	return -ENODEV;
	217	}
	218
	219	/* 'state' [R] */
	220	entry = proc_create_data(ACPI_AC_FILE_STATE,
	221	S_IRUGO, acpi_device_dir(ac->device),
	222	&acpi_ac_fops, ac);
	223	if (!entry)
	224	return -ENODEV;
	225	return 0;
	226	}
	227
	228	static int acpi_ac_remove_fs(struct acpi_ac *ac)
229	{
230
231	if (acpi_device_dir(ac->device)) {
232	remove_proc_entry(ACPI_AC_FILE_STATE,
233	acpi_device_dir(ac->device));
234	remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
235	acpi_device_dir(ac->device) = NULL;
236	}
237
238	return 0;
239	}
240	#endif
241
1da177e4 LT	242	/* --------------------------------------------------------------------------
	243	Driver Model
	244	-------------------------------------------------------------------------- */
	245
98012849	246	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	247	{
98012849	248	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4 LT	249
1da177e4 LT	250	if (!ac)
d550d98d	251	return;
1da177e4	252
1da177e4	253	switch (event) {
f163ff51 LB	254	default:
	255	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	256	"Unsupported event [0x%x]\n", event));
1da177e4	257	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	258	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	259	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	260	/*
	261	* A buggy BIOS may notify AC first and then sleep for
	262	* a specific time before doing actual operations in the
	263	* EC event handler (_Qxx). This will cause the AC state
	264	* reported by the ACPI event to be incorrect, so wait for a
	265	* specific time for the EC event handler to make progress.
	266	*/
	267	if (ac_sleep_before_get_state_ms > 0)
	268	msleep(ac_sleep_before_get_state_ms);
	269
1da177e4	270	acpi_ac_get_state(ac);
98012849 GR	271	acpi_bus_generate_netlink_event(device->pnp.device_class,
	272	dev_name(&device->dev), event,
	273	(u32) ac->state);
	274	acpi_notifier_call_chain(device, event, (u32) ac->state);
297d716f	275	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
1da177e4 LT	276	}
1da177e4 LT	277
d550d98d	278	return;
1da177e4 LT	279	}
1da177e4 LT	280
4eee4f03 AM	281	static int acpi_ac_battery_notify(struct notifier_block *nb,
	282	unsigned long action, void *data)
	283	{
	284	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	285	struct acpi_bus_event event = (struct acpi_bus_event )data;
	286
	287	/*
	288	* On HP Pavilion dv6-6179er AC status notifications aren't triggered
	289	* when adapter is plugged/unplugged. However, battery status
	290	* notifcations are triggered when battery starts charging or
	291	* discharging. Re-reading AC status triggers lost AC notifications,
	292	* if AC status has changed.
	293	*/
	294	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	295	event->type == ACPI_BATTERY_NOTIFY_STATUS)
	296	acpi_ac_get_state(ac);
	297
	298	return NOTIFY_OK;
	299	}
	300
0ab5bb64 LT	301	static int thinkpad_e530_quirk(const struct dmi_system_id *d)
	302	{
	303	ac_sleep_before_get_state_ms = 1000;
	304	return 0;
	305	}
	306
44f610cd	307	static const struct dmi_system_id ac_dmi_table[] = {
0ab5bb64 LT	308	{
	309	.callback = thinkpad_e530_quirk,
	310	.ident = "thinkpad e530",
	311	.matches = {
	312	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	313	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	314	},
	315	},
	316	{},
	317	};
	318
98012849	319	static int acpi_ac_add(struct acpi_device *device)
1da177e4	320	{
297d716f	321	struct power_supply_config psy_cfg = {};
4be44fcd	322	int result = 0;
4be44fcd	323	struct acpi_ac *ac = NULL;
1da177e4	324
1da177e4	325
98012849 GR	326	if (!device)
98012849 GR	327	return -EINVAL;
cc8ef527	328
36bcbec7	329	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	330	if (!ac)
d550d98d	331	return -ENOMEM;
1da177e4	332
98012849 GR	333	ac->device = device;
	334	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	335	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	336	device->driver_data = ac;
1da177e4 LT	337
	338	result = acpi_ac_get_state(ac);
	339	if (result)
	340	goto end;
	341
297d716f KK	342	psy_cfg.drv_data = ac;
	343
	344	ac->charger_desc.name = acpi_device_bid(device);
e63f6e28 LT	345	#ifdef CONFIG_ACPI_PROCFS_POWER
	346	result = acpi_ac_add_fs(ac);
	347	if (result)
	348	goto end;
	349	#endif
297d716f KK	350	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	351	ac->charger_desc.properties = ac_props;
	352	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	353	ac->charger_desc.get_property = get_ac_property;
	354	ac->charger = power_supply_register(&ac->device->dev,
	355	&ac->charger_desc, &psy_cfg);
	356	if (IS_ERR(ac->charger)) {
	357	result = PTR_ERR(ac->charger);
f197ac13	358	goto end;
297d716f	359	}
1da177e4	360
4be44fcd	361	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
98012849	362	acpi_device_name(device), acpi_device_bid(device),
4be44fcd	363	ac->state ? "on-line" : "off-line");
1da177e4	364
4eee4f03 AM	365	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
4eee4f03 AM	366	register_acpi_notifier(&ac->battery_nb);
ab0fd674	367	end:
e63f6e28 LT	368	if (result) {
	369	#ifdef CONFIG_ACPI_PROCFS_POWER
	370	acpi_ac_remove_fs(ac);
	371	#endif
1da177e4	372	kfree(ac);
e63f6e28	373	}
1da177e4	374
0ab5bb64	375	dmi_check_system(ac_dmi_table);
d550d98d	376	return result;
1da177e4 LT	377	}
1da177e4 LT	378
90692404	379	#ifdef CONFIG_PM_SLEEP
ccda7069	380	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	381	{
	382	struct acpi_ac *ac;
	383	unsigned old_state;
ccda7069 RW	384
	385	if (!dev)
	386	return -EINVAL;
	387
98012849	388	ac = acpi_driver_data(to_acpi_device(dev));
ccda7069	389	if (!ac)
5bfeca31	390	return -EINVAL;
ccda7069	391
5bfeca31 AS	392	old_state = ac->state;
	393	if (acpi_ac_get_state(ac))
	394	return 0;
	395	if (old_state != ac->state)
297d716f	396	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
5bfeca31 AS	397	return 0;
5bfeca31 AS	398	}
06521c2e SK	399	#else
06521c2e SK	400	#define acpi_ac_resume NULL
90692404	401	#endif
5bfeca31	402
98012849	403	static int acpi_ac_remove(struct acpi_device *device)
1da177e4	404	{
98012849 GR	405	struct acpi_ac *ac = NULL;
98012849 GR	406
1da177e4	407
98012849	408	if (!device \|\| !acpi_driver_data(device))
d550d98d	409	return -EINVAL;
1da177e4	410
98012849	411	ac = acpi_driver_data(device);
1da177e4	412
297d716f	413	power_supply_unregister(ac->charger);
4eee4f03	414	unregister_acpi_notifier(&ac->battery_nb);
cc8ef527	415
e63f6e28 LT	416	#ifdef CONFIG_ACPI_PROCFS_POWER
	417	acpi_ac_remove_fs(ac);
	418	#endif
	419
1da177e4 LT	420	kfree(ac);
1da177e4 LT	421
d550d98d	422	return 0;
1da177e4 LT	423	}
1da177e4 LT	424
4be44fcd	425	static int __init acpi_ac_init(void)
1da177e4	426	{
3f86b832	427	int result;
1da177e4	428
4d8316d5 PM	429	if (acpi_disabled)
4d8316d5 PM	430	return -ENODEV;
1da177e4	431
e63f6e28 LT	432	#ifdef CONFIG_ACPI_PROCFS_POWER
	433	acpi_ac_dir = acpi_lock_ac_dir();
	434	if (!acpi_ac_dir)
	435	return -ENODEV;
	436	#endif
	437
	438
98012849	439	result = acpi_bus_register_driver(&acpi_ac_driver);
e63f6e28 LT	440	if (result < 0) {
	441	#ifdef CONFIG_ACPI_PROCFS_POWER
	442	acpi_unlock_ac_dir(acpi_ac_dir);
	443	#endif
d550d98d	444	return -ENODEV;
e63f6e28	445	}
1da177e4	446
d550d98d	447	return 0;
1da177e4 LT	448	}
1da177e4 LT	449
4be44fcd	450	static void __exit acpi_ac_exit(void)
1da177e4	451	{
98012849	452	acpi_bus_unregister_driver(&acpi_ac_driver);
e63f6e28 LT	453	#ifdef CONFIG_ACPI_PROCFS_POWER
	454	acpi_unlock_ac_dir(acpi_ac_dir);
	455	#endif
1da177e4	456	}
1da177e4 LT	457	module_init(acpi_ac_init);
1da177e4 LT	458	module_exit(acpi_ac_exit);