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power_supply: charger-manager: Use power_supply_*() API for accessing function attrs
[deliverable/linux.git] / drivers / acpi / battery.c
CommitLineData
1da177e4 1/*
aa650bbd 2 * battery.c - ACPI Battery Driver (Revision: 2.0)
1da177e4 3 *
aa650bbd
AS		 4 * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
1da177e4
LT		 6 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
7 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
8 *
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
24 *
25 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 */
27
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/types.h>
f1d4661a 32#include <linux/jiffies.h>
0f66af53 33#include <linux/async.h>
bc76f90b 34#include <linux/dmi.h>
f43691c6 35#include <linux/delay.h>
5a0e3ad6 36#include <linux/slab.h>
25be5821 37#include <linux/suspend.h>
4000e626 38#include <asm/unaligned.h>
d7380965 39
3a670cc7
LT		 40#ifdef CONFIG_ACPI_PROCFS_POWER
41#include <linux/proc_fs.h>
42#include <linux/seq_file.h>
43#include <asm/uaccess.h>
44#endif
45
8b48463f 46#include <linux/acpi.h>
d7380965
AS		 47#include <linux/power_supply.h>
48
f03be352
AM		 49#include "battery.h"
50
a192a958
LB		 51#define PREFIX "ACPI: "
52
1da177e4
LT		 53#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
54
1da177e4 55#define ACPI_BATTERY_DEVICE_NAME "Battery"
1da177e4 56
ae6f6187
LT		 57/* Battery power unit: 0 means mW, 1 means mA */
58#define ACPI_BATTERY_POWER_UNIT_MA 1
59
1ac5aaa6
ZR		 60#define ACPI_BATTERY_STATE_DISCHARGING 0x1
61#define ACPI_BATTERY_STATE_CHARGING 0x2
62#define ACPI_BATTERY_STATE_CRITICAL 0x4
63
1da177e4 64#define _COMPONENT ACPI_BATTERY_COMPONENT
b6ce4083 65
f52fd66d 66ACPI_MODULE_NAME("battery");
1da177e4 67
f52fd66d 68MODULE_AUTHOR("Paul Diefenbaugh");
aa650bbd 69MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
7cda93e0 70MODULE_DESCRIPTION("ACPI Battery Driver");
1da177e4
LT		 71MODULE_LICENSE("GPL");
72
a90b4038 73static int battery_bix_broken_package;
f43691c6 74static int battery_notification_delay_ms;
f1d4661a
AS		 75static unsigned int cache_time = 1000;
76module_param(cache_time, uint, 0644);
77MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
b6ce4083 78
3a670cc7
LT		 79#ifdef CONFIG_ACPI_PROCFS_POWER
80extern struct proc_dir_entry *acpi_lock_battery_dir(void);
81extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
82
83enum acpi_battery_files {
84 info_tag = 0,
85 state_tag,
86 alarm_tag,
87 ACPI_BATTERY_NUMFILES,
88};
89
90#endif
91
1ba90e3a
TR		 92static const struct acpi_device_id battery_device_ids[] = {
93 {"PNP0C0A", 0},
94 {"", 0},
95};
1ba90e3a 96
aa650bbd 97MODULE_DEVICE_TABLE(acpi, battery_device_ids);
1da177e4 98
7b3bcc4a
AS		 99enum {
100 ACPI_BATTERY_ALARM_PRESENT,
c67fcd67 101 ACPI_BATTERY_XINFO_PRESENT,
557d5868 102 ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
4000e626
KI		 103 /* On Lenovo Thinkpad models from 2010 and 2011, the power unit
104 switches between mWh and mAh depending on whether the system
105 is running on battery or not. When mAh is the unit, most
106 reported values are incorrect and need to be adjusted by
107 10000/design_voltage. Verified on x201, t410, t410s, and x220.
108 Pre-2010 and 2012 models appear to always report in mWh and
109 are thus unaffected (tested with t42, t61, t500, x200, x300,
110 and x230). Also, in mid-2012 Lenovo issued a BIOS update for
111 the 2011 models that fixes the issue (tested on x220 with a
112 post-1.29 BIOS), but as of Nov. 2012, no such update is
113 available for the 2010 models. */
114 ACPI_BATTERY_QUIRK_THINKPAD_MAH,
7b3bcc4a 115};
78490d82 116
1da177e4 117struct acpi_battery {
038fdea2 118 struct mutex lock;
69d94ec6 119 struct mutex sysfs_lock;
d7380965 120 struct power_supply bat;
f1d4661a 121 struct acpi_device *device;
25be5821 122 struct notifier_block pm_nb;
f1d4661a 123 unsigned long update_time;
016d5baa 124 int revision;
7faa144a 125 int rate_now;
d7380965
AS		 126 int capacity_now;
127 int voltage_now;
038fdea2 128 int design_capacity;
d7380965 129 int full_charge_capacity;
038fdea2
AS		 130 int technology;
131 int design_voltage;
132 int design_capacity_warning;
133 int design_capacity_low;
c67fcd67
AS		 134 int cycle_count;
135 int measurement_accuracy;
136 int max_sampling_time;
137 int min_sampling_time;
138 int max_averaging_interval;
139 int min_averaging_interval;
038fdea2
AS		 140 int capacity_granularity_1;
141 int capacity_granularity_2;
f1d4661a 142 int alarm;
038fdea2
AS		 143 char model_number[32];
144 char serial_number[32];
145 char type[32];
146 char oem_info[32];
f1d4661a
AS		 147 int state;
148 int power_unit;
7b3bcc4a 149 unsigned long flags;
1da177e4
LT		 150};
151
497888cf 152#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat)
d7380965 153
efd941f1 154static inline int acpi_battery_present(struct acpi_battery *battery)
b6ce4083 155{
78490d82
AS		 156 return battery->device->status.battery_present;
157}
038fdea2 158
d7380965
AS		 159static int acpi_battery_technology(struct acpi_battery *battery)
160{
161 if (!strcasecmp("NiCd", battery->type))
162 return POWER_SUPPLY_TECHNOLOGY_NiCd;
163 if (!strcasecmp("NiMH", battery->type))
164 return POWER_SUPPLY_TECHNOLOGY_NiMH;
165 if (!strcasecmp("LION", battery->type))
166 return POWER_SUPPLY_TECHNOLOGY_LION;
ad40e68b 167 if (!strncasecmp("LI-ION", battery->type, 6))
0bde7eee 168 return POWER_SUPPLY_TECHNOLOGY_LION;
d7380965
AS		 169 if (!strcasecmp("LiP", battery->type))
170 return POWER_SUPPLY_TECHNOLOGY_LIPO;
171 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
172}
173
9104476e 174static int acpi_battery_get_state(struct acpi_battery *battery);
b19073a0 175
56f382a0
RH		 176static int acpi_battery_is_charged(struct acpi_battery *battery)
177{
1ac5aaa6 178 /* charging, discharging or critical low */
56f382a0
RH		 179 if (battery->state != 0)
180 return 0;
181
182 /* battery not reporting charge */
183 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
184 battery->capacity_now == 0)
185 return 0;
186
187 /* good batteries update full_charge as the batteries degrade */
188 if (battery->full_charge_capacity == battery->capacity_now)
189 return 1;
190
191 /* fallback to using design values for broken batteries */
192 if (battery->design_capacity == battery->capacity_now)
193 return 1;
194
195 /* we don't do any sort of metric based on percentages */
196 return 0;
197}
198
d7380965
AS		 199static int acpi_battery_get_property(struct power_supply *psy,
200 enum power_supply_property psp,
201 union power_supply_propval *val)
202{
a1b4bd69 203 int ret = 0;
d7380965
AS		 204 struct acpi_battery *battery = to_acpi_battery(psy);
205
9104476e
AS		 206 if (acpi_battery_present(battery)) {
207 /* run battery update only if it is present */
208 acpi_battery_get_state(battery);
209 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
d7380965
AS		 210 return -ENODEV;
211 switch (psp) {
212 case POWER_SUPPLY_PROP_STATUS:
1ac5aaa6 213 if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
d7380965 214 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1ac5aaa6 215 else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
d7380965 216 val->intval = POWER_SUPPLY_STATUS_CHARGING;
56f382a0 217 else if (acpi_battery_is_charged(battery))
d7380965 218 val->intval = POWER_SUPPLY_STATUS_FULL;
4c41d3ad
RD		 219 else
220 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
d7380965
AS		 221 break;
222 case POWER_SUPPLY_PROP_PRESENT:
223 val->intval = acpi_battery_present(battery);
224 break;
225 case POWER_SUPPLY_PROP_TECHNOLOGY:
226 val->intval = acpi_battery_technology(battery);
227 break;
c67fcd67
AS		 228 case POWER_SUPPLY_PROP_CYCLE_COUNT:
229 val->intval = battery->cycle_count;
230 break;
d7380965 231 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
a1b4bd69
RW		 232 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
233 ret = -ENODEV;
234 else
235 val->intval = battery->design_voltage * 1000;
d7380965
AS		 236 break;
237 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
a1b4bd69
RW		 238 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
239 ret = -ENODEV;
240 else
241 val->intval = battery->voltage_now * 1000;
d7380965
AS		 242 break;
243 case POWER_SUPPLY_PROP_CURRENT_NOW:
7faa144a 244 case POWER_SUPPLY_PROP_POWER_NOW:
a1b4bd69
RW		 245 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
246 ret = -ENODEV;
247 else
248 val->intval = battery->rate_now * 1000;
d7380965
AS		 249 break;
250 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
251 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
a1b4bd69
RW		 252 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
253 ret = -ENODEV;
254 else
255 val->intval = battery->design_capacity * 1000;
d7380965
AS		 256 break;
257 case POWER_SUPPLY_PROP_CHARGE_FULL:
258 case POWER_SUPPLY_PROP_ENERGY_FULL:
a1b4bd69
RW		 259 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
260 ret = -ENODEV;
261 else
262 val->intval = battery->full_charge_capacity * 1000;
d7380965
AS		 263 break;
264 case POWER_SUPPLY_PROP_CHARGE_NOW:
265 case POWER_SUPPLY_PROP_ENERGY_NOW:
a1b4bd69
RW		 266 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
267 ret = -ENODEV;
268 else
269 val->intval = battery->capacity_now * 1000;
d7380965 270 break;
a58e1150 271 case POWER_SUPPLY_PROP_CAPACITY:
272 if (battery->capacity_now && battery->full_charge_capacity)
273 val->intval = battery->capacity_now * 100/
274 battery->full_charge_capacity;
275 else
276 val->intval = 0;
277 break;
1ac5aaa6
ZR		 278 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
279 if (battery->state & ACPI_BATTERY_STATE_CRITICAL)
280 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
281 else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
282 (battery->capacity_now <= battery->alarm))
283 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
284 else if (acpi_battery_is_charged(battery))
285 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
286 else
287 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
288 break;
d7380965
AS		 289 case POWER_SUPPLY_PROP_MODEL_NAME:
290 val->strval = battery->model_number;
291 break;
292 case POWER_SUPPLY_PROP_MANUFACTURER:
293 val->strval = battery->oem_info;
294 break;
7c2670bb 295 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
296 val->strval = battery->serial_number;
297 break;
d7380965 298 default:
a1b4bd69 299 ret = -EINVAL;
d7380965 300 }
a1b4bd69 301 return ret;
d7380965
AS		 302}
303
304static enum power_supply_property charge_battery_props[] = {
305 POWER_SUPPLY_PROP_STATUS,
306 POWER_SUPPLY_PROP_PRESENT,
307 POWER_SUPPLY_PROP_TECHNOLOGY,
c67fcd67 308 POWER_SUPPLY_PROP_CYCLE_COUNT,
d7380965
AS		 309 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
310 POWER_SUPPLY_PROP_VOLTAGE_NOW,
311 POWER_SUPPLY_PROP_CURRENT_NOW,
312 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
313 POWER_SUPPLY_PROP_CHARGE_FULL,
314 POWER_SUPPLY_PROP_CHARGE_NOW,
a58e1150 315 POWER_SUPPLY_PROP_CAPACITY,
1ac5aaa6 316 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
d7380965
AS		 317 POWER_SUPPLY_PROP_MODEL_NAME,
318 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 319 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965
AS		 320};
321
322static enum power_supply_property energy_battery_props[] = {
323 POWER_SUPPLY_PROP_STATUS,
324 POWER_SUPPLY_PROP_PRESENT,
325 POWER_SUPPLY_PROP_TECHNOLOGY,
c67fcd67 326 POWER_SUPPLY_PROP_CYCLE_COUNT,
d7380965
AS		 327 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
328 POWER_SUPPLY_PROP_VOLTAGE_NOW,
7faa144a 329 POWER_SUPPLY_PROP_POWER_NOW,
d7380965
AS		 330 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
331 POWER_SUPPLY_PROP_ENERGY_FULL,
332 POWER_SUPPLY_PROP_ENERGY_NOW,
a58e1150 333 POWER_SUPPLY_PROP_CAPACITY,
1ac5aaa6 334 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
d7380965
AS		 335 POWER_SUPPLY_PROP_MODEL_NAME,
336 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 337 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965
AS		 338};
339
3a670cc7
LT		 340#ifdef CONFIG_ACPI_PROCFS_POWER
341inline char *acpi_battery_units(struct acpi_battery *battery)
342{
343 return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ?
344 "mA" : "mW";
345}
346#endif
347
78490d82
AS		 348/* --------------------------------------------------------------------------
349 Battery Management
350 -------------------------------------------------------------------------- */
038fdea2
AS		 351struct acpi_offsets {
352 size_t offset; /* offset inside struct acpi_sbs_battery */
353 u8 mode; /* int or string? */
354};
b6ce4083 355
038fdea2
AS		 356static struct acpi_offsets state_offsets[] = {
357 {offsetof(struct acpi_battery, state), 0},
7faa144a 358 {offsetof(struct acpi_battery, rate_now), 0},
d7380965
AS		 359 {offsetof(struct acpi_battery, capacity_now), 0},
360 {offsetof(struct acpi_battery, voltage_now), 0},
038fdea2 361};
b6ce4083 362
038fdea2
AS		 363static struct acpi_offsets info_offsets[] = {
364 {offsetof(struct acpi_battery, power_unit), 0},
365 {offsetof(struct acpi_battery, design_capacity), 0},
d7380965 366 {offsetof(struct acpi_battery, full_charge_capacity), 0},
038fdea2
AS		 367 {offsetof(struct acpi_battery, technology), 0},
368 {offsetof(struct acpi_battery, design_voltage), 0},
369 {offsetof(struct acpi_battery, design_capacity_warning), 0},
370 {offsetof(struct acpi_battery, design_capacity_low), 0},
371 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
372 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
373 {offsetof(struct acpi_battery, model_number), 1},
374 {offsetof(struct acpi_battery, serial_number), 1},
375 {offsetof(struct acpi_battery, type), 1},
376 {offsetof(struct acpi_battery, oem_info), 1},
377};
b6ce4083 378
c67fcd67 379static struct acpi_offsets extended_info_offsets[] = {
016d5baa 380 {offsetof(struct acpi_battery, revision), 0},
c67fcd67
AS		 381 {offsetof(struct acpi_battery, power_unit), 0},
382 {offsetof(struct acpi_battery, design_capacity), 0},
383 {offsetof(struct acpi_battery, full_charge_capacity), 0},
384 {offsetof(struct acpi_battery, technology), 0},
385 {offsetof(struct acpi_battery, design_voltage), 0},
386 {offsetof(struct acpi_battery, design_capacity_warning), 0},
387 {offsetof(struct acpi_battery, design_capacity_low), 0},
388 {offsetof(struct acpi_battery, cycle_count), 0},
389 {offsetof(struct acpi_battery, measurement_accuracy), 0},
390 {offsetof(struct acpi_battery, max_sampling_time), 0},
391 {offsetof(struct acpi_battery, min_sampling_time), 0},
392 {offsetof(struct acpi_battery, max_averaging_interval), 0},
393 {offsetof(struct acpi_battery, min_averaging_interval), 0},
394 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
395 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
396 {offsetof(struct acpi_battery, model_number), 1},
397 {offsetof(struct acpi_battery, serial_number), 1},
398 {offsetof(struct acpi_battery, type), 1},
399 {offsetof(struct acpi_battery, oem_info), 1},
400};
401
038fdea2
AS		 402static int extract_package(struct acpi_battery *battery,
403 union acpi_object *package,
404 struct acpi_offsets *offsets, int num)
405{
106449e8 406 int i;
038fdea2
AS		 407 union acpi_object *element;
408 if (package->type != ACPI_TYPE_PACKAGE)
409 return -EFAULT;
410 for (i = 0; i < num; ++i) {
411 if (package->package.count <= i)
412 return -EFAULT;
413 element = &package->package.elements[i];
414 if (offsets[i].mode) {
106449e8
AS		 415 u8 *ptr = (u8 *)battery + offsets[i].offset;
416 if (element->type == ACPI_TYPE_STRING ||
417 element->type == ACPI_TYPE_BUFFER)
418 strncpy(ptr, element->string.pointer, 32);
419 else if (element->type == ACPI_TYPE_INTEGER) {
420 strncpy(ptr, (u8 *)&element->integer.value,
439913ff
LM		 421 sizeof(u64));
422 ptr[sizeof(u64)] = 0;
b8a1bdb1
AS		 423 } else
424 *ptr = 0; /* don't have value */
038fdea2 425 } else {
b8a1bdb1
AS		 426 int *x = (int *)((u8 *)battery + offsets[i].offset);
427 *x = (element->type == ACPI_TYPE_INTEGER) ?
428 element->integer.value : -1;
038fdea2 429 }
b6ce4083 430 }
b6ce4083
VL		 431 return 0;
432}
433
434static int acpi_battery_get_status(struct acpi_battery *battery)
435{
aa650bbd 436 if (acpi_bus_get_status(battery->device)) {
b6ce4083
VL		 437 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
438 return -ENODEV;
439 }
aa650bbd 440 return 0;
b6ce4083
VL		 441}
442
443static int acpi_battery_get_info(struct acpi_battery *battery)
1da177e4 444{
aa650bbd 445 int result = -EFAULT;
4be44fcd 446 acpi_status status = 0;
0f4c6547 447 char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ?
c67fcd67
AS		 448 "_BIX" : "_BIF";
449
4be44fcd 450 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 451
b6ce4083
VL		 452 if (!acpi_battery_present(battery))
453 return 0;
038fdea2 454 mutex_lock(&battery->lock);
c67fcd67
AS		 455 status = acpi_evaluate_object(battery->device->handle, name,
456 NULL, &buffer);
038fdea2 457 mutex_unlock(&battery->lock);
aa650bbd 458
1da177e4 459 if (ACPI_FAILURE(status)) {
c67fcd67 460 ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name));
d550d98d 461 return -ENODEV;
1da177e4 462 }
a90b4038
LT		 463
464 if (battery_bix_broken_package)
465 result = extract_package(battery, buffer.pointer,
466 extended_info_offsets + 1,
467 ARRAY_SIZE(extended_info_offsets) - 1);
468 else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags))
c67fcd67
AS		 469 result = extract_package(battery, buffer.pointer,
470 extended_info_offsets,
471 ARRAY_SIZE(extended_info_offsets));
472 else
473 result = extract_package(battery, buffer.pointer,
474 info_offsets, ARRAY_SIZE(info_offsets));
78490d82 475 kfree(buffer.pointer);
557d5868
ZR		 476 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
477 battery->full_charge_capacity = battery->design_capacity;
4000e626
KI		 478 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
479 battery->power_unit && battery->design_voltage) {
480 battery->design_capacity = battery->design_capacity *
481 10000 / battery->design_voltage;
482 battery->full_charge_capacity = battery->full_charge_capacity *
483 10000 / battery->design_voltage;
484 battery->design_capacity_warning =
485 battery->design_capacity_warning *
486 10000 / battery->design_voltage;
487 /* Curiously, design_capacity_low, unlike the rest of them,
488 is correct. */
489 /* capacity_granularity_* equal 1 on the systems tested, so
490 it's impossible to tell if they would need an adjustment
491 or not if their values were higher. */
492 }
d550d98d 493 return result;
1da177e4
LT		 494}
495
b6ce4083 496static int acpi_battery_get_state(struct acpi_battery *battery)
1da177e4 497{
4be44fcd
LB		 498 int result = 0;
499 acpi_status status = 0;
500 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 501
b6ce4083
VL		 502 if (!acpi_battery_present(battery))
503 return 0;
1da177e4 504
f1d4661a
AS		 505 if (battery->update_time &&
506 time_before(jiffies, battery->update_time +
507 msecs_to_jiffies(cache_time)))
508 return 0;
509
038fdea2 510 mutex_lock(&battery->lock);
f1d4661a 511 status = acpi_evaluate_object(battery->device->handle, "_BST",
038fdea2
AS		 512 NULL, &buffer);
513 mutex_unlock(&battery->lock);
5b31d895 514
1da177e4 515 if (ACPI_FAILURE(status)) {
a6fc6720 516 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
d550d98d 517 return -ENODEV;
1da177e4 518 }
aa650bbd 519
038fdea2
AS		 520 result = extract_package(battery, buffer.pointer,
521 state_offsets, ARRAY_SIZE(state_offsets));
f1d4661a 522 battery->update_time = jiffies;
78490d82 523 kfree(buffer.pointer);
bc76f90b 524
55003b21
LT		 525 /* For buggy DSDTs that report negative 16-bit values for either
526 * charging or discharging current and/or report 0 as 65536
527 * due to bad math.
528 */
529 if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA &&
530 battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN &&
531 (s16)(battery->rate_now) < 0) {
bc76f90b 532 battery->rate_now = abs((s16)battery->rate_now);
55003b21
LT		 533 printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate"
534 " invalid.\n");
535 }
bc76f90b 536
557d5868
ZR		 537 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
538 && battery->capacity_now >= 0 && battery->capacity_now <= 100)
539 battery->capacity_now = (battery->capacity_now *
540 battery->full_charge_capacity) / 100;
4000e626
KI		 541 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
542 battery->power_unit && battery->design_voltage) {
543 battery->capacity_now = battery->capacity_now *
544 10000 / battery->design_voltage;
545 }
b6ce4083
VL		 546 return result;
547}
1da177e4 548
aa650bbd 549static int acpi_battery_set_alarm(struct acpi_battery *battery)
1da177e4 550{
4be44fcd 551 acpi_status status = 0;
1da177e4 552
c67fcd67 553 if (!acpi_battery_present(battery) ||
7b3bcc4a 554 !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
d550d98d 555 return -ENODEV;
1da177e4 556
038fdea2 557 mutex_lock(&battery->lock);
0db98202
JL		 558 status = acpi_execute_simple_method(battery->device->handle, "_BTP",
559 battery->alarm);
038fdea2 560 mutex_unlock(&battery->lock);
aa650bbd 561
1da177e4 562 if (ACPI_FAILURE(status))
d550d98d 563 return -ENODEV;
1da177e4 564
aa650bbd 565 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
d550d98d 566 return 0;
1da177e4
LT		 567}
568
b6ce4083 569static int acpi_battery_init_alarm(struct acpi_battery *battery)
1da177e4 570{
b6ce4083 571 /* See if alarms are supported, and if so, set default */
952c63e9 572 if (!acpi_has_method(battery->device->handle, "_BTP")) {
7b3bcc4a 573 clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a 574 return 0;
b6ce4083 575 }
7b3bcc4a 576 set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a
AS		 577 if (!battery->alarm)
578 battery->alarm = battery->design_capacity_warning;
aa650bbd 579 return acpi_battery_set_alarm(battery);
b6ce4083 580}
1da177e4 581
508df92d
AB		 582static ssize_t acpi_battery_alarm_show(struct device *dev,
583 struct device_attribute *attr,
584 char *buf)
585{
586 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
587 return sprintf(buf, "%d\n", battery->alarm * 1000);
588}
589
590static ssize_t acpi_battery_alarm_store(struct device *dev,
591 struct device_attribute *attr,
592 const char *buf, size_t count)
593{
594 unsigned long x;
595 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
47a08c85 596 if (sscanf(buf, "%lu\n", &x) == 1)
508df92d
AB		 597 battery->alarm = x/1000;
598 if (acpi_battery_present(battery))
599 acpi_battery_set_alarm(battery);
600 return count;
601}
602
603static struct device_attribute alarm_attr = {
01e8ef11 604 .attr = {.name = "alarm", .mode = 0644},
508df92d
AB		 605 .show = acpi_battery_alarm_show,
606 .store = acpi_battery_alarm_store,
607};
608
609static int sysfs_add_battery(struct acpi_battery *battery)
610{
611 int result;
612
ae6f6187 613 if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
508df92d
AB		 614 battery->bat.properties = charge_battery_props;
615 battery->bat.num_properties =
616 ARRAY_SIZE(charge_battery_props);
617 } else {
618 battery->bat.properties = energy_battery_props;
619 battery->bat.num_properties =
620 ARRAY_SIZE(energy_battery_props);
621 }
622
623 battery->bat.name = acpi_device_bid(battery->device);
624 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
625 battery->bat.get_property = acpi_battery_get_property;
626
2dc9215d
KK		 627 result = power_supply_register_no_ws(&battery->device->dev,
628 &battery->bat, NULL);
e0d1f09e 629
508df92d
AB		 630 if (result)
631 return result;
632 return device_create_file(battery->bat.dev, &alarm_attr);
633}
634
635static void sysfs_remove_battery(struct acpi_battery *battery)
636{
69d94ec6 637 mutex_lock(&battery->sysfs_lock);
9c921c22 638 if (!battery->bat.dev) {
69d94ec6 639 mutex_unlock(&battery->sysfs_lock);
508df92d 640 return;
9c921c22
LT		 641 }
642
508df92d
AB		 643 device_remove_file(battery->bat.dev, &alarm_attr);
644 power_supply_unregister(&battery->bat);
9104476e 645 battery->bat.dev = NULL;
69d94ec6 646 mutex_unlock(&battery->sysfs_lock);
bc76f90b
HM		 647}
648
4000e626
KI		 649static void find_battery(const struct dmi_header *dm, void *private)
650{
651 struct acpi_battery *battery = (struct acpi_battery *)private;
652 /* Note: the hardcoded offsets below have been extracted from
653 the source code of dmidecode. */
654 if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) {
655 const u8 *dmi_data = (const u8 *)(dm + 1);
656 int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6));
657 if (dm->length >= 18)
658 dmi_capacity *= dmi_data[17];
659 if (battery->design_capacity * battery->design_voltage / 1000
660 != dmi_capacity &&
661 battery->design_capacity * 10 == dmi_capacity)
662 set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
663 &battery->flags);
664 }
665}
666
557d5868
ZR		 667/*
668 * According to the ACPI spec, some kinds of primary batteries can
669 * report percentage battery remaining capacity directly to OS.
670 * In this case, it reports the Last Full Charged Capacity == 100
671 * and BatteryPresentRate == 0xFFFFFFFF.
672 *
673 * Now we found some battery reports percentage remaining capacity
674 * even if it's rechargeable.
675 * https://bugzilla.kernel.org/show_bug.cgi?id=15979
676 *
677 * Handle this correctly so that they won't break userspace.
678 */
7b78622d 679static void acpi_battery_quirks(struct acpi_battery *battery)
557d5868
ZR		 680{
681 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
0f4c6547 682 return;
557d5868 683
0f4c6547
NM		 684 if (battery->full_charge_capacity == 100 &&
685 battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN &&
686 battery->capacity_now >= 0 && battery->capacity_now <= 100) {
557d5868
ZR		 687 set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags);
688 battery->full_charge_capacity = battery->design_capacity;
689 battery->capacity_now = (battery->capacity_now *
690 battery->full_charge_capacity) / 100;
691 }
4000e626
KI		 692
693 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags))
0f4c6547 694 return;
4000e626
KI		 695
696 if (battery->power_unit && dmi_name_in_vendors("LENOVO")) {
697 const char *s;
698 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
ffd8a731 699 if (s && !strncasecmp(s, "ThinkPad", 8)) {
4000e626
KI		 700 dmi_walk(find_battery, battery);
701 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
702 &battery->flags) &&
703 battery->design_voltage) {
704 battery->design_capacity =
705 battery->design_capacity *
706 10000 / battery->design_voltage;
707 battery->full_charge_capacity =
708 battery->full_charge_capacity *
709 10000 / battery->design_voltage;
710 battery->design_capacity_warning =
711 battery->design_capacity_warning *
712 10000 / battery->design_voltage;
713 battery->capacity_now = battery->capacity_now *
714 10000 / battery->design_voltage;
715 }
716 }
717 }
557d5868
ZR		 718}
719
9e50bc14 720static int acpi_battery_update(struct acpi_battery *battery, bool resume)
b6ce4083 721{
50b17851 722 int result, old_present = acpi_battery_present(battery);
97749cd9 723 result = acpi_battery_get_status(battery);
508df92d 724 if (result)
b6ce4083 725 return result;
508df92d
AB		 726 if (!acpi_battery_present(battery)) {
727 sysfs_remove_battery(battery);
97749cd9 728 battery->update_time = 0;
508df92d 729 return 0;
b6ce4083 730 }
9e50bc14
LT		 731
732 if (resume)
733 return 0;
734
50b17851
AS		 735 if (!battery->update_time ||
736 old_present != acpi_battery_present(battery)) {
97749cd9
AS		 737 result = acpi_battery_get_info(battery);
738 if (result)
739 return result;
740 acpi_battery_init_alarm(battery);
741 }
eb03cb02
SH		 742 if (!battery->bat.dev) {
743 result = sysfs_add_battery(battery);
744 if (result)
745 return result;
746 }
557d5868 747 result = acpi_battery_get_state(battery);
e0d1f09e
ZR		 748 if (result)
749 return result;
7b78622d 750 acpi_battery_quirks(battery);
e0d1f09e
ZR		 751
752 /*
753 * Wakeup the system if battery is critical low
754 * or lower than the alarm level
755 */
756 if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) ||
757 (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
758 (battery->capacity_now <= battery->alarm)))
759 pm_wakeup_event(&battery->device->dev, 0);
760
557d5868 761 return result;
4bd35cdb
VL		 762}
763
da8aeb92
RW		 764static void acpi_battery_refresh(struct acpi_battery *battery)
765{
c5971456
AW		 766 int power_unit;
767
da8aeb92
RW		 768 if (!battery->bat.dev)
769 return;
770
c5971456
AW		 771 power_unit = battery->power_unit;
772
da8aeb92 773 acpi_battery_get_info(battery);
c5971456
AW		 774
775 if (power_unit == battery->power_unit)
776 return;
777
778 /* The battery has changed its reporting units. */
da8aeb92
RW		 779 sysfs_remove_battery(battery);
780 sysfs_add_battery(battery);
781}
782
3a670cc7
LT		 783/* --------------------------------------------------------------------------
784 FS Interface (/proc)
785 -------------------------------------------------------------------------- */
786
787#ifdef CONFIG_ACPI_PROCFS_POWER
788static struct proc_dir_entry *acpi_battery_dir;
789
790static int acpi_battery_print_info(struct seq_file *seq, int result)
791{
792 struct acpi_battery *battery = seq->private;
793
794 if (result)
795 goto end;
796
797 seq_printf(seq, "present: %s\n",
798 acpi_battery_present(battery) ? "yes" : "no");
799 if (!acpi_battery_present(battery))
800 goto end;
801 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
802 seq_printf(seq, "design capacity: unknown\n");
803 else
804 seq_printf(seq, "design capacity: %d %sh\n",
805 battery->design_capacity,
806 acpi_battery_units(battery));
807
808 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
809 seq_printf(seq, "last full capacity: unknown\n");
810 else
811 seq_printf(seq, "last full capacity: %d %sh\n",
812 battery->full_charge_capacity,
813 acpi_battery_units(battery));
814
815 seq_printf(seq, "battery technology: %srechargeable\n",
816 (!battery->technology)?"non-":"");
817
818 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
819 seq_printf(seq, "design voltage: unknown\n");
820 else
821 seq_printf(seq, "design voltage: %d mV\n",
822 battery->design_voltage);
823 seq_printf(seq, "design capacity warning: %d %sh\n",
824 battery->design_capacity_warning,
825 acpi_battery_units(battery));
826 seq_printf(seq, "design capacity low: %d %sh\n",
827 battery->design_capacity_low,
828 acpi_battery_units(battery));
829 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
830 seq_printf(seq, "capacity granularity 1: %d %sh\n",
831 battery->capacity_granularity_1,
832 acpi_battery_units(battery));
833 seq_printf(seq, "capacity granularity 2: %d %sh\n",
834 battery->capacity_granularity_2,
835 acpi_battery_units(battery));
836 seq_printf(seq, "model number: %s\n", battery->model_number);
837 seq_printf(seq, "serial number: %s\n", battery->serial_number);
838 seq_printf(seq, "battery type: %s\n", battery->type);
839 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
840 end:
841 if (result)
842 seq_printf(seq, "ERROR: Unable to read battery info\n");
843 return result;
844}
845
846static int acpi_battery_print_state(struct seq_file *seq, int result)
847{
848 struct acpi_battery *battery = seq->private;
849
850 if (result)
851 goto end;
852
853 seq_printf(seq, "present: %s\n",
854 acpi_battery_present(battery) ? "yes" : "no");
855 if (!acpi_battery_present(battery))
856 goto end;
857
858 seq_printf(seq, "capacity state: %s\n",
859 (battery->state & 0x04) ? "critical" : "ok");
860 if ((battery->state & 0x01) && (battery->state & 0x02))
861 seq_printf(seq,
862 "charging state: charging/discharging\n");
863 else if (battery->state & 0x01)
864 seq_printf(seq, "charging state: discharging\n");
865 else if (battery->state & 0x02)
866 seq_printf(seq, "charging state: charging\n");
867 else
868 seq_printf(seq, "charging state: charged\n");
869
870 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
871 seq_printf(seq, "present rate: unknown\n");
872 else
873 seq_printf(seq, "present rate: %d %s\n",
874 battery->rate_now, acpi_battery_units(battery));
875
876 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
877 seq_printf(seq, "remaining capacity: unknown\n");
878 else
879 seq_printf(seq, "remaining capacity: %d %sh\n",
880 battery->capacity_now, acpi_battery_units(battery));
881 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
882 seq_printf(seq, "present voltage: unknown\n");
883 else
884 seq_printf(seq, "present voltage: %d mV\n",
885 battery->voltage_now);
886 end:
887 if (result)
888 seq_printf(seq, "ERROR: Unable to read battery state\n");
889
890 return result;
891}
892
893static int acpi_battery_print_alarm(struct seq_file *seq, int result)
894{
895 struct acpi_battery *battery = seq->private;
896
897 if (result)
898 goto end;
899
900 if (!acpi_battery_present(battery)) {
901 seq_printf(seq, "present: no\n");
902 goto end;
903 }
904 seq_printf(seq, "alarm: ");
905 if (!battery->alarm)
906 seq_printf(seq, "unsupported\n");
907 else
908 seq_printf(seq, "%u %sh\n", battery->alarm,
909 acpi_battery_units(battery));
910 end:
911 if (result)
912 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
913 return result;
914}
915
916static ssize_t acpi_battery_write_alarm(struct file *file,
917 const char __user * buffer,
918 size_t count, loff_t * ppos)
919{
920 int result = 0;
921 char alarm_string[12] = { '\0' };
922 struct seq_file *m = file->private_data;
923 struct acpi_battery *battery = m->private;
924
925 if (!battery || (count > sizeof(alarm_string) - 1))
926 return -EINVAL;
927 if (!acpi_battery_present(battery)) {
928 result = -ENODEV;
929 goto end;
930 }
931 if (copy_from_user(alarm_string, buffer, count)) {
932 result = -EFAULT;
933 goto end;
934 }
935 alarm_string[count] = '\0';
3d915894
CJ		 936 if (kstrtoint(alarm_string, 0, &battery->alarm)) {
937 result = -EINVAL;
938 goto end;
939 }
3a670cc7
LT		 940 result = acpi_battery_set_alarm(battery);
941 end:
942 if (!result)
943 return count;
944 return result;
945}
946
947typedef int(*print_func)(struct seq_file *seq, int result);
948
949static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
950 acpi_battery_print_info,
951 acpi_battery_print_state,
952 acpi_battery_print_alarm,
953};
954
955static int acpi_battery_read(int fid, struct seq_file *seq)
956{
957 struct acpi_battery *battery = seq->private;
9e50bc14 958 int result = acpi_battery_update(battery, false);
3a670cc7
LT		 959 return acpi_print_funcs[fid](seq, result);
960}
961
962#define DECLARE_FILE_FUNCTIONS(_name) \
963static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
964{ \
965 return acpi_battery_read(_name##_tag, seq); \
966} \
967static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
968{ \
969 return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \
970}
971
972DECLARE_FILE_FUNCTIONS(info);
973DECLARE_FILE_FUNCTIONS(state);
974DECLARE_FILE_FUNCTIONS(alarm);
975
976#undef DECLARE_FILE_FUNCTIONS
977
978#define FILE_DESCRIPTION_RO(_name) \
979 { \
980 .name = __stringify(_name), \
981 .mode = S_IRUGO, \
982 .ops = { \
983 .open = acpi_battery_##_name##_open_fs, \
984 .read = seq_read, \
985 .llseek = seq_lseek, \
986 .release = single_release, \
987 .owner = THIS_MODULE, \
988 }, \
989 }
990
991#define FILE_DESCRIPTION_RW(_name) \
992 { \
993 .name = __stringify(_name), \
994 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
995 .ops = { \
996 .open = acpi_battery_##_name##_open_fs, \
997 .read = seq_read, \
998 .llseek = seq_lseek, \
999 .write = acpi_battery_write_##_name, \
1000 .release = single_release, \
1001 .owner = THIS_MODULE, \
1002 }, \
1003 }
1004
1005static const struct battery_file {
1006 struct file_operations ops;
1007 umode_t mode;
1008 const char *name;
1009} acpi_battery_file[] = {
1010 FILE_DESCRIPTION_RO(info),
1011 FILE_DESCRIPTION_RO(state),
1012 FILE_DESCRIPTION_RW(alarm),
1013};
1014
1015#undef FILE_DESCRIPTION_RO
1016#undef FILE_DESCRIPTION_RW
1017
1018static int acpi_battery_add_fs(struct acpi_device *device)
1019{
1020 struct proc_dir_entry *entry = NULL;
1021 int i;
1022
1023 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded,"
1024 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
1025 if (!acpi_device_dir(device)) {
1026 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1027 acpi_battery_dir);
1028 if (!acpi_device_dir(device))
1029 return -ENODEV;
1030 }
1031
1032 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
1033 entry = proc_create_data(acpi_battery_file[i].name,
1034 acpi_battery_file[i].mode,
1035 acpi_device_dir(device),
1036 &acpi_battery_file[i].ops,
1037 acpi_driver_data(device));
1038 if (!entry)
1039 return -ENODEV;
1040 }
1041 return 0;
1042}
1043
1044static void acpi_battery_remove_fs(struct acpi_device *device)
1045{
1046 int i;
1047 if (!acpi_device_dir(device))
1048 return;
1049 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
1050 remove_proc_entry(acpi_battery_file[i].name,
1051 acpi_device_dir(device));
1052
1053 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
1054 acpi_device_dir(device) = NULL;
1055}
1056
1057#endif
1058
1da177e4
LT		 1059/* --------------------------------------------------------------------------
1060 Driver Interface
1061 -------------------------------------------------------------------------- */
1062
d9406691 1063static void acpi_battery_notify(struct acpi_device *device, u32 event)
1da177e4 1064{
d9406691 1065 struct acpi_battery *battery = acpi_driver_data(device);
153e500f 1066 struct device *old;
d9406691 1067
1da177e4 1068 if (!battery)
d550d98d 1069 return;
153e500f 1070 old = battery->bat.dev;
f43691c6
AM		 1071 /*
1072 * On Acer Aspire V5-573G notifications are sometimes triggered too
1073 * early. For example, when AC is unplugged and notification is
1074 * triggered, battery state is still reported as "Full", and changes to
1075 * "Discharging" only after short delay, without any notification.
1076 */
1077 if (battery_notification_delay_ms > 0)
1078 msleep(battery_notification_delay_ms);
da8aeb92
RW		 1079 if (event == ACPI_BATTERY_NOTIFY_INFO)
1080 acpi_battery_refresh(battery);
9e50bc14 1081 acpi_battery_update(battery, false);
f1d4661a 1082 acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d 1083 dev_name(&device->dev), event,
9ea7d575 1084 acpi_battery_present(battery));
411e0f77 1085 acpi_notifier_call_chain(device, event, acpi_battery_present(battery));
2345baf4 1086 /* acpi_battery_update could remove power_supply object */
153e500f 1087 if (old && battery->bat.dev)
f79e1cec 1088 power_supply_changed(&battery->bat);
1da177e4
LT		 1089}
1090
25be5821
KM		 1091static int battery_notify(struct notifier_block *nb,
1092 unsigned long mode, void *_unused)
1093{
1094 struct acpi_battery *battery = container_of(nb, struct acpi_battery,
1095 pm_nb);
9e50bc14
LT		 1096 int result;
1097
25be5821 1098 switch (mode) {
d5a5911b 1099 case PM_POST_HIBERNATION:
25be5821 1100 case PM_POST_SUSPEND:
9e50bc14
LT		 1101 if (!acpi_battery_present(battery))
1102 return 0;
1103
1104 if (!battery->bat.dev) {
1105 result = acpi_battery_get_info(battery);
1106 if (result)
1107 return result;
1108
1109 result = sysfs_add_battery(battery);
1110 if (result)
1111 return result;
1112 } else
1113 acpi_battery_refresh(battery);
1114
1115 acpi_battery_init_alarm(battery);
1116 acpi_battery_get_state(battery);
25be5821
KM		 1117 break;
1118 }
1119
1120 return 0;
1121}
1122
3f5dc08f
AM		 1123static int battery_bix_broken_package_quirk(const struct dmi_system_id *d)
1124{
1125 battery_bix_broken_package = 1;
1126 return 0;
1127}
1128
f43691c6
AM		 1129static int battery_notification_delay_quirk(const struct dmi_system_id *d)
1130{
1131 battery_notification_delay_ms = 1000;
1132 return 0;
1133}
1134
a90b4038
LT		 1135static struct dmi_system_id bat_dmi_table[] = {
1136 {
3f5dc08f 1137 .callback = battery_bix_broken_package_quirk,
a90b4038
LT		 1138 .ident = "NEC LZ750/LS",
1139 .matches = {
1140 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1141 DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"),
1142 },
1143 },
f43691c6
AM		 1144 {
1145 .callback = battery_notification_delay_quirk,
1146 .ident = "Acer Aspire V5-573G",
1147 .matches = {
1148 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1149 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
1150 },
1151 },
a90b4038
LT		 1152 {},
1153};
1154
75646e75
LT		 1155/*
1156 * Some machines'(E,G Lenovo Z480) ECs are not stable
1157 * during boot up and this causes battery driver fails to be
1158 * probed due to failure of getting battery information
1159 * from EC sometimes. After several retries, the operation
1160 * may work. So add retry code here and 20ms sleep between
1161 * every retries.
1162 */
1163static int acpi_battery_update_retry(struct acpi_battery *battery)
1164{
1165 int retry, ret;
1166
1167 for (retry = 5; retry; retry--) {
1168 ret = acpi_battery_update(battery, false);
1169 if (!ret)
1170 break;
1171
1172 msleep(20);
1173 }
1174 return ret;
1175}
1176
4be44fcd 1177static int acpi_battery_add(struct acpi_device *device)
1da177e4 1178{
4be44fcd 1179 int result = 0;
4be44fcd 1180 struct acpi_battery *battery = NULL;
952c63e9 1181
1da177e4 1182 if (!device)
d550d98d 1183 return -EINVAL;
40e7fcb1
LT		 1184
1185 if (device->dep_unmet)
1186 return -EPROBE_DEFER;
1187
36bcbec7 1188 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
1da177e4 1189 if (!battery)
d550d98d 1190 return -ENOMEM;
145def84 1191 battery->device = device;
1da177e4
LT		 1192 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
1193 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
db89b4f0 1194 device->driver_data = battery;
038fdea2 1195 mutex_init(&battery->lock);
69d94ec6 1196 mutex_init(&battery->sysfs_lock);
952c63e9 1197 if (acpi_has_method(battery->device->handle, "_BIX"))
c67fcd67 1198 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
75646e75
LT		 1199
1200 result = acpi_battery_update_retry(battery);
eb03cb02
SH		 1201 if (result)
1202 goto fail;
75646e75 1203
3a670cc7
LT		 1204#ifdef CONFIG_ACPI_PROCFS_POWER
1205 result = acpi_battery_add_fs(device);
1206#endif
1207 if (result) {
1208#ifdef CONFIG_ACPI_PROCFS_POWER
1209 acpi_battery_remove_fs(device);
1210#endif
1211 goto fail;
1212 }
25be5821 1213
e80bba4b
SH		 1214 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
1215 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
1216 device->status.battery_present ? "present" : "absent");
1217
25be5821
KM		 1218 battery->pm_nb.notifier_call = battery_notify;
1219 register_pm_notifier(&battery->pm_nb);
1220
e0d1f09e
ZR		 1221 device_init_wakeup(&device->dev, 1);
1222
d550d98d 1223 return result;
e80bba4b
SH		 1224
1225fail:
1226 sysfs_remove_battery(battery);
1227 mutex_destroy(&battery->lock);
69d94ec6 1228 mutex_destroy(&battery->sysfs_lock);
e80bba4b
SH		 1229 kfree(battery);
1230 return result;
1da177e4
LT		 1231}
1232
51fac838 1233static int acpi_battery_remove(struct acpi_device *device)
1da177e4 1234{
4be44fcd 1235 struct acpi_battery *battery = NULL;
1da177e4 1236
1da177e4 1237 if (!device || !acpi_driver_data(device))
d550d98d 1238 return -EINVAL;
e0d1f09e 1239 device_init_wakeup(&device->dev, 0);
50dd0969 1240 battery = acpi_driver_data(device);
25be5821 1241 unregister_pm_notifier(&battery->pm_nb);
3a670cc7
LT		 1242#ifdef CONFIG_ACPI_PROCFS_POWER
1243 acpi_battery_remove_fs(device);
1244#endif
508df92d 1245 sysfs_remove_battery(battery);
038fdea2 1246 mutex_destroy(&battery->lock);
69d94ec6 1247 mutex_destroy(&battery->sysfs_lock);
1da177e4 1248 kfree(battery);
d550d98d 1249 return 0;
1da177e4
LT		 1250}
1251
90692404 1252#ifdef CONFIG_PM_SLEEP
34c4415a 1253/* this is needed to learn about changes made in suspended state */
a6f50dc8 1254static int acpi_battery_resume(struct device *dev)
34c4415a
JK		 1255{
1256 struct acpi_battery *battery;
a6f50dc8
RW		 1257
1258 if (!dev)
34c4415a 1259 return -EINVAL;
a6f50dc8
RW		 1260
1261 battery = acpi_driver_data(to_acpi_device(dev));
1262 if (!battery)
1263 return -EINVAL;
1264
f1d4661a 1265 battery->update_time = 0;
9e50bc14 1266 acpi_battery_update(battery, true);
b6ce4083 1267 return 0;
34c4415a 1268}
7f6895c6
SK		 1269#else
1270#define acpi_battery_resume NULL
90692404 1271#endif
34c4415a 1272
a6f50dc8
RW		 1273static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume);
1274
aa650bbd
AS		 1275static struct acpi_driver acpi_battery_driver = {
1276 .name = "battery",
1277 .class = ACPI_BATTERY_CLASS,
1278 .ids = battery_device_ids,
d9406691 1279 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
aa650bbd
AS		 1280 .ops = {
1281 .add = acpi_battery_add,
aa650bbd 1282 .remove = acpi_battery_remove,
d9406691 1283 .notify = acpi_battery_notify,
aa650bbd 1284 },
a6f50dc8 1285 .drv.pm = &acpi_battery_pm,
aa650bbd
AS		 1286};
1287
b0cbc861 1288static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
1da177e4 1289{
4d8316d5 1290 if (acpi_disabled)
0f66af53 1291 return;
a90b4038 1292
3f5dc08f 1293 dmi_check_system(bat_dmi_table);
3a670cc7
LT		 1294
1295#ifdef CONFIG_ACPI_PROCFS_POWER
1296 acpi_battery_dir = acpi_lock_battery_dir();
1297 if (!acpi_battery_dir)
1298 return;
1299#endif
1300 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
1301#ifdef CONFIG_ACPI_PROCFS_POWER
1302 acpi_unlock_battery_dir(acpi_battery_dir);
1303#endif
1304 return;
1305 }
1306 return;
0f66af53
AV		 1307}
1308
1309static int __init acpi_battery_init(void)
1310{
1311 async_schedule(acpi_battery_init_async, NULL);
d550d98d 1312 return 0;
1da177e4
LT		 1313}
1314
4be44fcd 1315static void __exit acpi_battery_exit(void)
1da177e4 1316{
1da177e4 1317 acpi_bus_unregister_driver(&acpi_battery_driver);
3a670cc7
LT		 1318#ifdef CONFIG_ACPI_PROCFS_POWER
1319 acpi_unlock_battery_dir(acpi_battery_dir);
1320#endif
1da177e4
LT		 1321}
1322
1da177e4
LT		 1323module_init(acpi_battery_init);
1324module_exit(acpi_battery_exit);
Linux kernel - Deliverables
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