[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 acpi_device * device;
	unsigned long long state;
	struct notifier_block battery_nb;
};

#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)

#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 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)
{
	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;

	ac->charger.name = acpi_device_bid(device);
#ifdef CONFIG_ACPI_PROCFS_POWER
	result = acpi_ac_add_fs(ac);
	if (result)
		goto end;
#endif
	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	ac->charger.properties = ac_props;
	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	ac->charger.get_property = get_ac_property;
	result = power_supply_register(&ac->device->dev, &ac->charger);
	if (result)
		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);

	if (ac->charger.dev)
		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 {
d5b4a3d0	98	struct power_supply charger;
98012849	99	struct acpi_device * device;
27663c58	100	unsigned long long state;
4eee4f03	101	struct notifier_block battery_nb;
1da177e4 LT	102	};
1da177e4 LT	103
497888cf	104	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
d5b4a3d0	105
e63f6e28 LT	106	#ifdef CONFIG_ACPI_PROCFS_POWER
	107	static const struct file_operations acpi_ac_fops = {
	108	.owner = THIS_MODULE,
	109	.open = acpi_ac_open_fs,
	110	.read = seq_read,
	111	.llseek = seq_lseek,
	112	.release = single_release,
	113	};
	114	#endif
	115
1da177e4 LT	116	/* --------------------------------------------------------------------------
	117	AC Adapter Management
	118	-------------------------------------------------------------------------- */
	119
4be44fcd	120	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	121	{
98012849 GR	122	acpi_status status = AE_OK;
	123
	124	if (!ac)
	125	return -EINVAL;
1da177e4	126
98012849	127	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
cc8ef527	128	&ac->state);
1da177e4	129	if (ACPI_FAILURE(status)) {
cc8ef527 ZR	130	ACPI_EXCEPTION((AE_INFO, status,
cc8ef527 ZR	131	"Error reading AC Adapter state"));
1da177e4	132	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	133	return -ENODEV;
1da177e4	134	}
4be44fcd	135
d550d98d	136	return 0;
1da177e4 LT	137	}
1da177e4 LT	138
3151dbb0 ZR	139	/* --------------------------------------------------------------------------
	140	sysfs I/F
	141	-------------------------------------------------------------------------- */
	142	static int get_ac_property(struct power_supply *psy,
	143	enum power_supply_property psp,
	144	union power_supply_propval *val)
	145	{
	146	struct acpi_ac *ac = to_acpi_ac(psy);
	147
	148	if (!ac)
	149	return -ENODEV;
	150
	151	if (acpi_ac_get_state(ac))
	152	return -ENODEV;
	153
	154	switch (psp) {
	155	case POWER_SUPPLY_PROP_ONLINE:
	156	val->intval = ac->state;
	157	break;
	158	default:
	159	return -EINVAL;
	160	}
	161	return 0;
	162	}
	163
	164	static enum power_supply_property ac_props[] = {
	165	POWER_SUPPLY_PROP_ONLINE,
	166	};
	167
e63f6e28 LT	168	#ifdef CONFIG_ACPI_PROCFS_POWER
	169	/* --------------------------------------------------------------------------
	170	FS Interface (/proc)
	171	-------------------------------------------------------------------------- */
	172
	173	static struct proc_dir_entry *acpi_ac_dir;
	174
	175	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	176	{
	177	struct acpi_ac *ac = seq->private;
	178
	179
	180	if (!ac)
	181	return 0;
	182
	183	if (acpi_ac_get_state(ac)) {
	184	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
	185	return 0;
	186	}
	187
	188	seq_puts(seq, "state: ");
	189	switch (ac->state) {
	190	case ACPI_AC_STATUS_OFFLINE:
	191	seq_puts(seq, "off-line\n");
	192	break;
	193	case ACPI_AC_STATUS_ONLINE:
	194	seq_puts(seq, "on-line\n");
	195	break;
	196	default:
	197	seq_puts(seq, "unknown\n");
	198	break;
	199	}
	200
	201	return 0;
	202	}
	203
	204	static int acpi_ac_open_fs(struct inode inode, struct file file)
	205	{
	206	return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
	207	}
	208
	209	static int acpi_ac_add_fs(struct acpi_ac *ac)
	210	{
	211	struct proc_dir_entry *entry = NULL;
	212
	213	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
	214	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	215	if (!acpi_device_dir(ac->device)) {
	216	acpi_device_dir(ac->device) =
	217	proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
	218	if (!acpi_device_dir(ac->device))
	219	return -ENODEV;
	220	}
	221
	222	/* 'state' [R] */
	223	entry = proc_create_data(ACPI_AC_FILE_STATE,
	224	S_IRUGO, acpi_device_dir(ac->device),
	225	&acpi_ac_fops, ac);
	226	if (!entry)
	227	return -ENODEV;
	228	return 0;
	229	}
	230
	231	static int acpi_ac_remove_fs(struct acpi_ac *ac)
232	{
233
234	if (acpi_device_dir(ac->device)) {
235	remove_proc_entry(ACPI_AC_FILE_STATE,
236	acpi_device_dir(ac->device));
237	remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
238	acpi_device_dir(ac->device) = NULL;
239	}
240
241	return 0;
242	}
243	#endif
244
1da177e4 LT	245	/* --------------------------------------------------------------------------
	246	Driver Model
	247	-------------------------------------------------------------------------- */
	248
98012849	249	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	250	{
98012849	251	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4 LT	252
1da177e4 LT	253	if (!ac)
d550d98d	254	return;
1da177e4	255
1da177e4	256	switch (event) {
f163ff51 LB	257	default:
	258	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	259	"Unsupported event [0x%x]\n", event));
1da177e4	260	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	261	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	262	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	263	/*
	264	* A buggy BIOS may notify AC first and then sleep for
	265	* a specific time before doing actual operations in the
	266	* EC event handler (_Qxx). This will cause the AC state
	267	* reported by the ACPI event to be incorrect, so wait for a
	268	* specific time for the EC event handler to make progress.
	269	*/
	270	if (ac_sleep_before_get_state_ms > 0)
	271	msleep(ac_sleep_before_get_state_ms);
	272
1da177e4	273	acpi_ac_get_state(ac);
98012849 GR	274	acpi_bus_generate_netlink_event(device->pnp.device_class,
	275	dev_name(&device->dev), event,
	276	(u32) ac->state);
	277	acpi_notifier_call_chain(device, event, (u32) ac->state);
d5b4a3d0	278	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
1da177e4 LT	279	}
1da177e4 LT	280
d550d98d	281	return;
1da177e4 LT	282	}
1da177e4 LT	283
4eee4f03 AM	284	static int acpi_ac_battery_notify(struct notifier_block *nb,
	285	unsigned long action, void *data)
	286	{
	287	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	288	struct acpi_bus_event event = (struct acpi_bus_event )data;
	289
	290	/*
	291	* On HP Pavilion dv6-6179er AC status notifications aren't triggered
	292	* when adapter is plugged/unplugged. However, battery status
	293	* notifcations are triggered when battery starts charging or
	294	* discharging. Re-reading AC status triggers lost AC notifications,
	295	* if AC status has changed.
	296	*/
	297	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	298	event->type == ACPI_BATTERY_NOTIFY_STATUS)
	299	acpi_ac_get_state(ac);
	300
	301	return NOTIFY_OK;
	302	}
	303
0ab5bb64 LT	304	static int thinkpad_e530_quirk(const struct dmi_system_id *d)
	305	{
	306	ac_sleep_before_get_state_ms = 1000;
	307	return 0;
	308	}
	309
	310	static struct dmi_system_id ac_dmi_table[] = {
	311	{
	312	.callback = thinkpad_e530_quirk,
	313	.ident = "thinkpad e530",
	314	.matches = {
	315	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	316	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
	317	},
	318	},
	319	{},
	320	};
	321
98012849	322	static int acpi_ac_add(struct acpi_device *device)
1da177e4	323	{
4be44fcd	324	int result = 0;
4be44fcd	325	struct acpi_ac *ac = NULL;
1da177e4	326
1da177e4	327
98012849 GR	328	if (!device)
98012849 GR	329	return -EINVAL;
cc8ef527	330
36bcbec7	331	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	332	if (!ac)
d550d98d	333	return -ENOMEM;
1da177e4	334
98012849 GR	335	ac->device = device;
	336	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	337	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	338	device->driver_data = ac;
1da177e4 LT	339
	340	result = acpi_ac_get_state(ac);
	341	if (result)
	342	goto end;
	343
98012849	344	ac->charger.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
d5b4a3d0 AS	350	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	351	ac->charger.properties = ac_props;
	352	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	353	ac->charger.get_property = get_ac_property;
98012849	354	result = power_supply_register(&ac->device->dev, &ac->charger);
f197ac13 LT	355	if (result)
f197ac13 LT	356	goto end;
1da177e4	357
4be44fcd	358	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
98012849	359	acpi_device_name(device), acpi_device_bid(device),
4be44fcd	360	ac->state ? "on-line" : "off-line");
1da177e4	361
4eee4f03 AM	362	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
4eee4f03 AM	363	register_acpi_notifier(&ac->battery_nb);
ab0fd674	364	end:
e63f6e28 LT	365	if (result) {
	366	#ifdef CONFIG_ACPI_PROCFS_POWER
	367	acpi_ac_remove_fs(ac);
	368	#endif
1da177e4	369	kfree(ac);
e63f6e28	370	}
1da177e4	371
0ab5bb64	372	dmi_check_system(ac_dmi_table);
d550d98d	373	return result;
1da177e4 LT	374	}
1da177e4 LT	375
90692404	376	#ifdef CONFIG_PM_SLEEP
ccda7069	377	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	378	{
	379	struct acpi_ac *ac;
	380	unsigned old_state;
ccda7069 RW	381
	382	if (!dev)
	383	return -EINVAL;
	384
98012849	385	ac = acpi_driver_data(to_acpi_device(dev));
ccda7069	386	if (!ac)
5bfeca31	387	return -EINVAL;
ccda7069	388
5bfeca31 AS	389	old_state = ac->state;
	390	if (acpi_ac_get_state(ac))
	391	return 0;
	392	if (old_state != ac->state)
	393	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	394	return 0;
	395	}
06521c2e SK	396	#else
06521c2e SK	397	#define acpi_ac_resume NULL
90692404	398	#endif
5bfeca31	399
98012849	400	static int acpi_ac_remove(struct acpi_device *device)
1da177e4	401	{
98012849 GR	402	struct acpi_ac *ac = NULL;
98012849 GR	403
1da177e4	404
98012849	405	if (!device \|\| !acpi_driver_data(device))
d550d98d	406	return -EINVAL;
1da177e4	407
98012849	408	ac = acpi_driver_data(device);
1da177e4	409
d5b4a3d0 AS	410	if (ac->charger.dev)
d5b4a3d0 AS	411	power_supply_unregister(&ac->charger);
4eee4f03	412	unregister_acpi_notifier(&ac->battery_nb);
cc8ef527	413
e63f6e28 LT	414	#ifdef CONFIG_ACPI_PROCFS_POWER
	415	acpi_ac_remove_fs(ac);
	416	#endif
	417
1da177e4 LT	418	kfree(ac);
1da177e4 LT	419
d550d98d	420	return 0;
1da177e4 LT	421	}
1da177e4 LT	422
4be44fcd	423	static int __init acpi_ac_init(void)
1da177e4	424	{
3f86b832	425	int result;
1da177e4	426
4d8316d5 PM	427	if (acpi_disabled)
4d8316d5 PM	428	return -ENODEV;
1da177e4	429
e63f6e28 LT	430	#ifdef CONFIG_ACPI_PROCFS_POWER
	431	acpi_ac_dir = acpi_lock_ac_dir();
	432	if (!acpi_ac_dir)
	433	return -ENODEV;
	434	#endif
	435
	436
98012849	437	result = acpi_bus_register_driver(&acpi_ac_driver);
e63f6e28 LT	438	if (result < 0) {
	439	#ifdef CONFIG_ACPI_PROCFS_POWER
	440	acpi_unlock_ac_dir(acpi_ac_dir);
	441	#endif
d550d98d	442	return -ENODEV;
e63f6e28	443	}
1da177e4	444
d550d98d	445	return 0;
1da177e4 LT	446	}
1da177e4 LT	447
4be44fcd	448	static void __exit acpi_ac_exit(void)
1da177e4	449	{
98012849	450	acpi_bus_unregister_driver(&acpi_ac_driver);
e63f6e28 LT	451	#ifdef CONFIG_ACPI_PROCFS_POWER
	452	acpi_unlock_ac_dir(acpi_ac_dir);
	453	#endif
1da177e4	454	}
1da177e4 LT	455	module_init(acpi_ac_init);
1da177e4 LT	456	module_exit(acpi_ac_exit);