ac.c 11.2 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
/*
 *  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>
28
#include <linux/slab.h>
L
Linus Torvalds 已提交
29 30
#include <linux/init.h>
#include <linux/types.h>
31 32
#include <linux/dmi.h>
#include <linux/delay.h>
33 34 35 36
#ifdef CONFIG_ACPI_PROCFS_POWER
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#endif
37
#include <linux/platform_device.h>
38
#include <linux/power_supply.h>
39
#include <linux/acpi.h>
40
#include "battery.h"
L
Linus Torvalds 已提交
41

42 43
#define PREFIX "ACPI: "

L
Linus Torvalds 已提交
44 45 46 47 48 49 50 51 52
#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
53
ACPI_MODULE_NAME("ac");
L
Linus Torvalds 已提交
54

55
MODULE_AUTHOR("Paul Diefenbaugh");
56
MODULE_DESCRIPTION("ACPI AC Adapter Driver");
L
Linus Torvalds 已提交
57 58
MODULE_LICENSE("GPL");

59

60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
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);

75 76 77 78 79 80 81
#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


82 83
static int ac_sleep_before_get_state_ms;

84 85 86 87 88 89 90 91 92 93 94 95 96
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,
};

L
Linus Torvalds 已提交
97
struct acpi_ac {
98 99
	struct power_supply *charger;
	struct power_supply_desc charger_desc;
100
	struct acpi_device * device;
101
	unsigned long long state;
102
	struct notifier_block battery_nb;
L
Linus Torvalds 已提交
103 104
};

105
#define to_acpi_ac(x) power_supply_get_drvdata(x)
106

107 108 109 110 111 112 113 114 115 116
#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

L
Linus Torvalds 已提交
117 118 119 120
/* --------------------------------------------------------------------------
                               AC Adapter Management
   -------------------------------------------------------------------------- */

L
Len Brown 已提交
121
static int acpi_ac_get_state(struct acpi_ac *ac)
L
Linus Torvalds 已提交
122
{
123 124 125 126
	acpi_status status = AE_OK;

	if (!ac)
		return -EINVAL;
L
Linus Torvalds 已提交
127

128
	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
129
				       &ac->state);
L
Linus Torvalds 已提交
130
	if (ACPI_FAILURE(status)) {
131 132
		ACPI_EXCEPTION((AE_INFO, status,
				"Error reading AC Adapter state"));
L
Linus Torvalds 已提交
133
		ac->state = ACPI_AC_STATUS_UNKNOWN;
134
		return -ENODEV;
L
Linus Torvalds 已提交
135
	}
L
Len Brown 已提交
136

137
	return 0;
L
Linus Torvalds 已提交
138 139
}

140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168
/* --------------------------------------------------------------------------
                            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,
};

169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245
#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

L
Linus Torvalds 已提交
246 247 248 249
/* --------------------------------------------------------------------------
                                   Driver Model
   -------------------------------------------------------------------------- */

250
static void acpi_ac_notify(struct acpi_device *device, u32 event)
L
Linus Torvalds 已提交
251
{
252
	struct acpi_ac *ac = acpi_driver_data(device);
L
Linus Torvalds 已提交
253 254

	if (!ac)
255
		return;
L
Linus Torvalds 已提交
256 257

	switch (event) {
L
Len Brown 已提交
258 259 260
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
L
Linus Torvalds 已提交
261
	case ACPI_AC_NOTIFY_STATUS:
262 263
	case ACPI_NOTIFY_BUS_CHECK:
	case ACPI_NOTIFY_DEVICE_CHECK:
264 265 266 267 268 269 270 271 272 273
		/*
		 * 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);

L
Linus Torvalds 已提交
274
		acpi_ac_get_state(ac);
275 276 277 278
		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);
279
		kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
L
Linus Torvalds 已提交
280 281
	}

282
	return;
L
Linus Torvalds 已提交
283 284
}

285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304
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;
}

305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322
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"),
		},
	},
	{},
};

323
static int acpi_ac_add(struct acpi_device *device)
L
Linus Torvalds 已提交
324
{
325
	struct power_supply_config psy_cfg = {};
L
Len Brown 已提交
326 327
	int result = 0;
	struct acpi_ac *ac = NULL;
L
Linus Torvalds 已提交
328 329


330 331
	if (!device)
		return -EINVAL;
332

333
	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
L
Linus Torvalds 已提交
334
	if (!ac)
335
		return -ENOMEM;
L
Linus Torvalds 已提交
336

337 338 339 340
	ac->device = device;
	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	device->driver_data = ac;
L
Linus Torvalds 已提交
341 342 343 344 345

	result = acpi_ac_get_state(ac);
	if (result)
		goto end;

346 347 348
	psy_cfg.drv_data = ac;

	ac->charger_desc.name = acpi_device_bid(device);
349 350 351 352 353
#ifdef CONFIG_ACPI_PROCFS_POWER
	result = acpi_ac_add_fs(ac);
	if (result)
		goto end;
#endif
354 355 356 357 358 359 360 361
	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);
362
		goto end;
363
	}
L
Linus Torvalds 已提交
364

L
Len Brown 已提交
365
	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
366
	       acpi_device_name(device), acpi_device_bid(device),
L
Len Brown 已提交
367
	       ac->state ? "on-line" : "off-line");
L
Linus Torvalds 已提交
368

369 370
	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
	register_acpi_notifier(&ac->battery_nb);
371
end:
372 373 374 375
	if (result) {
#ifdef CONFIG_ACPI_PROCFS_POWER
		acpi_ac_remove_fs(ac);
#endif
L
Linus Torvalds 已提交
376
		kfree(ac);
377
	}
L
Linus Torvalds 已提交
378

379
	dmi_check_system(ac_dmi_table);
380
	return result;
L
Linus Torvalds 已提交
381 382
}

383
#ifdef CONFIG_PM_SLEEP
384
static int acpi_ac_resume(struct device *dev)
385 386 387
{
	struct acpi_ac *ac;
	unsigned old_state;
388 389 390 391

	if (!dev)
		return -EINVAL;

392
	ac = acpi_driver_data(to_acpi_device(dev));
393
	if (!ac)
394
		return -EINVAL;
395

396 397 398 399
	old_state = ac->state;
	if (acpi_ac_get_state(ac))
		return 0;
	if (old_state != ac->state)
400
		kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
401 402
	return 0;
}
403 404
#else
#define acpi_ac_resume NULL
405
#endif
406

407
static int acpi_ac_remove(struct acpi_device *device)
L
Linus Torvalds 已提交
408
{
409 410
	struct acpi_ac *ac = NULL;

L
Linus Torvalds 已提交
411

412
	if (!device || !acpi_driver_data(device))
413
		return -EINVAL;
L
Linus Torvalds 已提交
414

415
	ac = acpi_driver_data(device);
L
Linus Torvalds 已提交
416

417
	power_supply_unregister(ac->charger);
418
	unregister_acpi_notifier(&ac->battery_nb);
419

420 421 422 423
#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_ac_remove_fs(ac);
#endif

L
Linus Torvalds 已提交
424 425
	kfree(ac);

426
	return 0;
L
Linus Torvalds 已提交
427 428
}

L
Len Brown 已提交
429
static int __init acpi_ac_init(void)
L
Linus Torvalds 已提交
430
{
431
	int result;
L
Linus Torvalds 已提交
432

P
Pavel Machek 已提交
433 434
	if (acpi_disabled)
		return -ENODEV;
L
Linus Torvalds 已提交
435

436 437 438 439 440 441 442
#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_ac_dir = acpi_lock_ac_dir();
	if (!acpi_ac_dir)
		return -ENODEV;
#endif


443
	result = acpi_bus_register_driver(&acpi_ac_driver);
444 445 446 447
	if (result < 0) {
#ifdef CONFIG_ACPI_PROCFS_POWER
		acpi_unlock_ac_dir(acpi_ac_dir);
#endif
448
		return -ENODEV;
449
	}
L
Linus Torvalds 已提交
450

451
	return 0;
L
Linus Torvalds 已提交
452 453
}

L
Len Brown 已提交
454
static void __exit acpi_ac_exit(void)
L
Linus Torvalds 已提交
455
{
456
	acpi_bus_unregister_driver(&acpi_ac_driver);
457 458 459
#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_unlock_ac_dir(acpi_ac_dir);
#endif
L
Linus Torvalds 已提交
460 461 462
}
module_init(acpi_ac_init);
module_exit(acpi_ac_exit);