[deliverable/linux.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.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#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	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	22	*
	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
5a0e3ad6	28	#include <linux/slab.h>
1da177e4 LT	29	#include <linux/init.h>
1da177e4 LT	30	#include <linux/types.h>
0ab5bb64 LT	31	#include <linux/dmi.h>
0ab5bb64 LT	32	#include <linux/delay.h>
e63f6e28 LT	33	#ifdef CONFIG_ACPI_PROCFS_POWER
	34	#include <linux/proc_fs.h>
	35	#include <linux/seq_file.h>
	36	#endif
cc8ef527	37	#include <linux/platform_device.h>
d5b4a3d0	38	#include <linux/power_supply.h>
8b48463f	39	#include <linux/acpi.h>
4eee4f03	40	#include "battery.h"
1da177e4	41
a192a958 LB	42	#define PREFIX "ACPI: "
a192a958 LB	43
1da177e4	44	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	45	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	46	#define ACPI_AC_FILE_STATE "state"
	47	#define ACPI_AC_NOTIFY_STATUS 0x80
	48	#define ACPI_AC_STATUS_OFFLINE 0x00
	49	#define ACPI_AC_STATUS_ONLINE 0x01
	50	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	51
	52	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	53	ACPI_MODULE_NAME("ac");
1da177e4	54
f52fd66d	55	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	56	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	57	MODULE_LICENSE("GPL");
1da177e4 LT	58
e63f6e28	59
98012849 GR	60	static int acpi_ac_add(struct acpi_device *device);
	61	static int acpi_ac_remove(struct acpi_device *device);
	62	static void acpi_ac_notify(struct acpi_device *device, u32 event);
	63
	64	static const struct acpi_device_id ac_device_ids[] = {
	65	{"ACPI0003", 0},
	66	{"", 0},
	67	};
	68	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	69
	70	#ifdef CONFIG_PM_SLEEP
	71	static int acpi_ac_resume(struct device *dev);
	72	#endif
	73	static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
	74
e63f6e28 LT	75	#ifdef CONFIG_ACPI_PROCFS_POWER
	76	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
	77	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
	78	static int acpi_ac_open_fs(struct inode inode, struct file file);
	79	#endif
	80
	81
0ab5bb64 LT	82	static int ac_sleep_before_get_state_ms;
0ab5bb64 LT	83
98012849 GR	84	static struct acpi_driver acpi_ac_driver = {
	85	.name = "ac",
	86	.class = ACPI_AC_CLASS,
	87	.ids = ac_device_ids,
	88	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	89	.ops = {
	90	.add = acpi_ac_add,
	91	.remove = acpi_ac_remove,
	92	.notify = acpi_ac_notify,
	93	},
	94	.drv.pm = &acpi_ac_pm,
	95	};
	96
1da177e4	97	struct acpi_ac {
297d716f KK	98	struct power_supply *charger;
297d716f KK	99	struct power_supply_desc charger_desc;
98012849	100	struct acpi_device * device;
27663c58	101	unsigned long long state;
4eee4f03	102	struct notifier_block battery_nb;
1da177e4 LT	103	};
1da177e4 LT	104
297d716f	105	#define to_acpi_ac(x) power_supply_get_drvdata(x)
d5b4a3d0	106
e63f6e28 LT	107	#ifdef CONFIG_ACPI_PROCFS_POWER
	108	static const struct file_operations acpi_ac_fops = {
	109	.owner = THIS_MODULE,
	110	.open = acpi_ac_open_fs,
	111	.read = seq_read,
	112	.llseek = seq_lseek,
	113	.release = single_release,
	114	};
	115	#endif
	116
1da177e4 LT	117	/* --------------------------------------------------------------------------
	118	AC Adapter Management
	119	-------------------------------------------------------------------------- */
	120
4be44fcd	121	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	122	{
98012849 GR	123	acpi_status status = AE_OK;
	124
	125	if (!ac)
	126	return -EINVAL;
1da177e4	127
98012849	128	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
cc8ef527	129	&ac->state);
1da177e4	130	if (ACPI_FAILURE(status)) {
cc8ef527 ZR	131	ACPI_EXCEPTION((AE_INFO, status,
cc8ef527 ZR	132	"Error reading AC Adapter state"));
1da177e4	133	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	134	return -ENODEV;
1da177e4	135	}
4be44fcd	136
d550d98d	137	return 0;
1da177e4 LT	138	}
1da177e4 LT	139
3151dbb0 ZR	140	/* --------------------------------------------------------------------------
	141	sysfs I/F
	142	-------------------------------------------------------------------------- */
	143	static int get_ac_property(struct power_supply *psy,
	144	enum power_supply_property psp,
	145	union power_supply_propval *val)
	146	{
	147	struct acpi_ac *ac = to_acpi_ac(psy);
	148
	149	if (!ac)
	150	return -ENODEV;
	151
	152	if (acpi_ac_get_state(ac))
	153	return -ENODEV;
	154
	155	switch (psp) {
	156	case POWER_SUPPLY_PROP_ONLINE:
	157	val->intval = ac->state;
	158	break;
	159	default:
	160	return -EINVAL;
	161	}
	162	return 0;
	163	}
	164
	165	static enum power_supply_property ac_props[] = {
	166	POWER_SUPPLY_PROP_ONLINE,
	167	};
	168
e63f6e28 LT	169	#ifdef CONFIG_ACPI_PROCFS_POWER
	170	/* --------------------------------------------------------------------------
	171	FS Interface (/proc)
	172	-------------------------------------------------------------------------- */
	173
	174	static struct proc_dir_entry *acpi_ac_dir;
	175
	176	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	177	{
	178	struct acpi_ac *ac = seq->private;
	179
	180
	181	if (!ac)
	182	return 0;
	183
	184	if (acpi_ac_get_state(ac)) {
	185	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
	186	return 0;
	187	}
	188
	189	seq_puts(seq, "state: ");
	190	switch (ac->state) {
	191	case ACPI_AC_STATUS_OFFLINE:
	192	seq_puts(seq, "off-line\n");
	193	break;
	194	case ACPI_AC_STATUS_ONLINE:
	195	seq_puts(seq, "on-line\n");
	196	break;
	197	default:
	198	seq_puts(seq, "unknown\n");
	199	break;
	200	}
	201
	202	return 0;
	203	}
	204
	205	static int acpi_ac_open_fs(struct inode inode, struct file file)
	206	{
	207	return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
	208	}
	209
	210	static int acpi_ac_add_fs(struct acpi_ac *ac)
	211	{
	212	struct proc_dir_entry *entry = NULL;
	213
	214	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
	215	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	216	if (!acpi_device_dir(ac->device)) {
	217	acpi_device_dir(ac->device) =
	218	proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
	219	if (!acpi_device_dir(ac->device))
	220	return -ENODEV;
	221	}
	222
	223	/* 'state' [R] */
	224	entry = proc_create_data(ACPI_AC_FILE_STATE,
	225	S_IRUGO, acpi_device_dir(ac->device),
	226	&acpi_ac_fops, ac);
	227	if (!entry)
	228	return -ENODEV;
	229	return 0;
	230	}
	231
	232	static int acpi_ac_remove_fs(struct acpi_ac *ac)
233	{
234
235	if (acpi_device_dir(ac->device)) {
236	remove_proc_entry(ACPI_AC_FILE_STATE,
237	acpi_device_dir(ac->device));
238	remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
239	acpi_device_dir(ac->device) = NULL;
240	}
241
242	return 0;
243	}
244	#endif
245
1da177e4 LT	246	/* --------------------------------------------------------------------------
	247	Driver Model
	248	-------------------------------------------------------------------------- */
	249
98012849	250	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	251	{
98012849	252	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4 LT	253
1da177e4 LT	254	if (!ac)
d550d98d	255	return;
1da177e4	256
1da177e4	257	switch (event) {
f163ff51 LB	258	default:
	259	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	260	"Unsupported event [0x%x]\n", event));
1da177e4	261	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	262	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	263	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	264	/*
	265	* A buggy BIOS may notify AC first and then sleep for
	266	* a specific time before doing actual operations in the
	267	* EC event handler (_Qxx). This will cause the AC state
	268	* reported by the ACPI event to be incorrect, so wait for a
	269	* specific time for the EC event handler to make progress.
	270	*/
	271	if (ac_sleep_before_get_state_ms > 0)
	272	msleep(ac_sleep_before_get_state_ms);
	273
1da177e4	274	acpi_ac_get_state(ac);
98012849 GR	275	acpi_bus_generate_netlink_event(device->pnp.device_class,
	276	dev_name(&device->dev), event,
	277	(u32) ac->state);
	278	acpi_notifier_call_chain(device, event, (u32) ac->state);
297d716f	279	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
1da177e4 LT	280	}
1da177e4 LT	281
d550d98d	282	return;
1da177e4 LT	283	}
1da177e4 LT	284
4eee4f03 AM	285	static int acpi_ac_battery_notify(struct notifier_block *nb,
	286	unsigned long action, void *data)
	287	{
	288	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	289	struct acpi_bus_event event = (struct acpi_bus_event )data;
	290
	291	/*
	292	* On HP Pavilion dv6-6179er AC status notifications aren't triggered
	293	* when adapter is plugged/unplugged. However, battery status
	294	* notifcations are triggered when battery starts charging or
	295	* discharging. Re-reading AC status triggers lost AC notifications,
	296	* if AC status has changed.
	297	*/
	298	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	299	event->type == ACPI_BATTERY_NOTIFY_STATUS)
	300	acpi_ac_get_state(ac);
	301
	302	return NOTIFY_OK;
	303	}
	304
0ab5bb64 LT	305	static int thinkpad_e530_quirk(const struct dmi_system_id *d)
	306	{
	307	ac_sleep_before_get_state_ms = 1000;
	308	return 0;
	309	}
	310
44f610cd	311	static const struct dmi_system_id ac_dmi_table[] = {
0ab5bb64 LT	312	{
	313	.callback = thinkpad_e530_quirk,
	314	.ident = "thinkpad e530",
	315	.matches = {
	316	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	317	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	318	},
	319	},
	320	{},
	321	};
	322
98012849	323	static int acpi_ac_add(struct acpi_device *device)
1da177e4	324	{
297d716f	325	struct power_supply_config psy_cfg = {};
4be44fcd	326	int result = 0;
4be44fcd	327	struct acpi_ac *ac = NULL;
1da177e4	328
1da177e4	329
98012849 GR	330	if (!device)
98012849 GR	331	return -EINVAL;
cc8ef527	332
36bcbec7	333	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	334	if (!ac)
d550d98d	335	return -ENOMEM;
1da177e4	336
98012849 GR	337	ac->device = device;
	338	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	339	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	340	device->driver_data = ac;
1da177e4 LT	341
	342	result = acpi_ac_get_state(ac);
	343	if (result)
	344	goto end;
	345
297d716f KK	346	psy_cfg.drv_data = ac;
	347
	348	ac->charger_desc.name = acpi_device_bid(device);
e63f6e28 LT	349	#ifdef CONFIG_ACPI_PROCFS_POWER
	350	result = acpi_ac_add_fs(ac);
	351	if (result)
	352	goto end;
	353	#endif
297d716f KK	354	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	355	ac->charger_desc.properties = ac_props;
	356	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	357	ac->charger_desc.get_property = get_ac_property;
	358	ac->charger = power_supply_register(&ac->device->dev,
	359	&ac->charger_desc, &psy_cfg);
	360	if (IS_ERR(ac->charger)) {
	361	result = PTR_ERR(ac->charger);
f197ac13	362	goto end;
297d716f	363	}
1da177e4	364
4be44fcd	365	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
98012849	366	acpi_device_name(device), acpi_device_bid(device),
4be44fcd	367	ac->state ? "on-line" : "off-line");
1da177e4	368
4eee4f03 AM	369	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
4eee4f03 AM	370	register_acpi_notifier(&ac->battery_nb);
ab0fd674	371	end:
e63f6e28 LT	372	if (result) {
	373	#ifdef CONFIG_ACPI_PROCFS_POWER
	374	acpi_ac_remove_fs(ac);
	375	#endif
1da177e4	376	kfree(ac);
e63f6e28	377	}
1da177e4	378
0ab5bb64	379	dmi_check_system(ac_dmi_table);
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	{
3f86b832	431	int result;
1da177e4	432
4d8316d5 PM	433	if (acpi_disabled)
4d8316d5 PM	434	return -ENODEV;
1da177e4	435
e63f6e28 LT	436	#ifdef CONFIG_ACPI_PROCFS_POWER
	437	acpi_ac_dir = acpi_lock_ac_dir();
	438	if (!acpi_ac_dir)
	439	return -ENODEV;
	440	#endif
	441
	442
98012849	443	result = acpi_bus_register_driver(&acpi_ac_driver);
e63f6e28 LT	444	if (result < 0) {
	445	#ifdef CONFIG_ACPI_PROCFS_POWER
	446	acpi_unlock_ac_dir(acpi_ac_dir);
	447	#endif
d550d98d	448	return -ENODEV;
e63f6e28	449	}
1da177e4	450
d550d98d	451	return 0;
1da177e4 LT	452	}
1da177e4 LT	453
4be44fcd	454	static void __exit acpi_ac_exit(void)
1da177e4	455	{
98012849	456	acpi_bus_unregister_driver(&acpi_ac_driver);
e63f6e28 LT	457	#ifdef CONFIG_ACPI_PROCFS_POWER
	458	acpi_unlock_ac_dir(acpi_ac_dir);
	459	#endif
1da177e4	460	}
1da177e4 LT	461	module_init(acpi_ac_init);
1da177e4 LT	462	module_exit(acpi_ac_exit);