]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/acpi/battery.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Linux 3.16-rc4
[mirror_ubuntu-artful-kernel.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
e0d1f09e
ZR		 627 result = power_supply_register_no_ws(&battery->device->dev, &battery->bat);
628
508df92d
AB		 629 if (result)
630 return result;
631 return device_create_file(battery->bat.dev, &alarm_attr);
632}
633
634static void sysfs_remove_battery(struct acpi_battery *battery)
635{
69d94ec6 636 mutex_lock(&battery->sysfs_lock);
9c921c22 637 if (!battery->bat.dev) {
69d94ec6 638 mutex_unlock(&battery->sysfs_lock);
508df92d 639 return;
9c921c22
LT		 640 }
641
508df92d
AB		 642 device_remove_file(battery->bat.dev, &alarm_attr);
643 power_supply_unregister(&battery->bat);
9104476e 644 battery->bat.dev = NULL;
69d94ec6 645 mutex_unlock(&battery->sysfs_lock);
bc76f90b
HM		 646}
647
4000e626
KI		 648static void find_battery(const struct dmi_header *dm, void *private)
649{
650 struct acpi_battery *battery = (struct acpi_battery *)private;
651 /* Note: the hardcoded offsets below have been extracted from
652 the source code of dmidecode. */
653 if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) {
654 const u8 *dmi_data = (const u8 *)(dm + 1);
655 int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6));
656 if (dm->length >= 18)
657 dmi_capacity *= dmi_data[17];
658 if (battery->design_capacity * battery->design_voltage / 1000
659 != dmi_capacity &&
660 battery->design_capacity * 10 == dmi_capacity)
661 set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
662 &battery->flags);
663 }
664}
665
557d5868
ZR		 666/*
667 * According to the ACPI spec, some kinds of primary batteries can
668 * report percentage battery remaining capacity directly to OS.
669 * In this case, it reports the Last Full Charged Capacity == 100
670 * and BatteryPresentRate == 0xFFFFFFFF.
671 *
672 * Now we found some battery reports percentage remaining capacity
673 * even if it's rechargeable.
674 * https://bugzilla.kernel.org/show_bug.cgi?id=15979
675 *
676 * Handle this correctly so that they won't break userspace.
677 */
7b78622d 678static void acpi_battery_quirks(struct acpi_battery *battery)
557d5868
ZR		 679{
680 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
0f4c6547 681 return;
557d5868 682
0f4c6547
NM		 683 if (battery->full_charge_capacity == 100 &&
684 battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN &&
685 battery->capacity_now >= 0 && battery->capacity_now <= 100) {
557d5868
ZR		 686 set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags);
687 battery->full_charge_capacity = battery->design_capacity;
688 battery->capacity_now = (battery->capacity_now *
689 battery->full_charge_capacity) / 100;
690 }
4000e626
KI		 691
692 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags))
0f4c6547 693 return;
4000e626
KI		 694
695 if (battery->power_unit && dmi_name_in_vendors("LENOVO")) {
696 const char *s;
697 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
698 if (s && !strnicmp(s, "ThinkPad", 8)) {
699 dmi_walk(find_battery, battery);
700 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
701 &battery->flags) &&
702 battery->design_voltage) {
703 battery->design_capacity =
704 battery->design_capacity *
705 10000 / battery->design_voltage;
706 battery->full_charge_capacity =
707 battery->full_charge_capacity *
708 10000 / battery->design_voltage;
709 battery->design_capacity_warning =
710 battery->design_capacity_warning *
711 10000 / battery->design_voltage;
712 battery->capacity_now = battery->capacity_now *
713 10000 / battery->design_voltage;
714 }
715 }
716 }
557d5868
ZR		 717}
718
9e50bc14 719static int acpi_battery_update(struct acpi_battery *battery, bool resume)
b6ce4083 720{
50b17851 721 int result, old_present = acpi_battery_present(battery);
97749cd9 722 result = acpi_battery_get_status(battery);
508df92d 723 if (result)
b6ce4083 724 return result;
508df92d
AB		 725 if (!acpi_battery_present(battery)) {
726 sysfs_remove_battery(battery);
97749cd9 727 battery->update_time = 0;
508df92d 728 return 0;
b6ce4083 729 }
9e50bc14
LT		 730
731 if (resume)
732 return 0;
733
50b17851
AS		 734 if (!battery->update_time ||
735 old_present != acpi_battery_present(battery)) {
97749cd9
AS		 736 result = acpi_battery_get_info(battery);
737 if (result)
738 return result;
739 acpi_battery_init_alarm(battery);
740 }
eb03cb02
SH		 741 if (!battery->bat.dev) {
742 result = sysfs_add_battery(battery);
743 if (result)
744 return result;
745 }
557d5868 746 result = acpi_battery_get_state(battery);
e0d1f09e
ZR		 747 if (result)
748 return result;
7b78622d 749 acpi_battery_quirks(battery);
e0d1f09e
ZR		 750
751 /*
752 * Wakeup the system if battery is critical low
753 * or lower than the alarm level
754 */
755 if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) ||
756 (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
757 (battery->capacity_now <= battery->alarm)))
758 pm_wakeup_event(&battery->device->dev, 0);
759
557d5868 760 return result;
4bd35cdb
VL		 761}
762
da8aeb92
RW		 763static void acpi_battery_refresh(struct acpi_battery *battery)
764{
c5971456
AW		 765 int power_unit;
766
da8aeb92
RW		 767 if (!battery->bat.dev)
768 return;
769
c5971456
AW		 770 power_unit = battery->power_unit;
771
da8aeb92 772 acpi_battery_get_info(battery);
c5971456
AW		 773
774 if (power_unit == battery->power_unit)
775 return;
776
777 /* The battery has changed its reporting units. */
da8aeb92
RW		 778 sysfs_remove_battery(battery);
779 sysfs_add_battery(battery);
780}
781
3a670cc7
LT		 782/* --------------------------------------------------------------------------
783 FS Interface (/proc)
784 -------------------------------------------------------------------------- */
785
786#ifdef CONFIG_ACPI_PROCFS_POWER
787static struct proc_dir_entry *acpi_battery_dir;
788
789static int acpi_battery_print_info(struct seq_file *seq, int result)
790{
791 struct acpi_battery *battery = seq->private;
792
793 if (result)
794 goto end;
795
796 seq_printf(seq, "present: %s\n",
797 acpi_battery_present(battery) ? "yes" : "no");
798 if (!acpi_battery_present(battery))
799 goto end;
800 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
801 seq_printf(seq, "design capacity: unknown\n");
802 else
803 seq_printf(seq, "design capacity: %d %sh\n",
804 battery->design_capacity,
805 acpi_battery_units(battery));
806
807 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
808 seq_printf(seq, "last full capacity: unknown\n");
809 else
810 seq_printf(seq, "last full capacity: %d %sh\n",
811 battery->full_charge_capacity,
812 acpi_battery_units(battery));
813
814 seq_printf(seq, "battery technology: %srechargeable\n",
815 (!battery->technology)?"non-":"");
816
817 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
818 seq_printf(seq, "design voltage: unknown\n");
819 else
820 seq_printf(seq, "design voltage: %d mV\n",
821 battery->design_voltage);
822 seq_printf(seq, "design capacity warning: %d %sh\n",
823 battery->design_capacity_warning,
824 acpi_battery_units(battery));
825 seq_printf(seq, "design capacity low: %d %sh\n",
826 battery->design_capacity_low,
827 acpi_battery_units(battery));
828 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
829 seq_printf(seq, "capacity granularity 1: %d %sh\n",
830 battery->capacity_granularity_1,
831 acpi_battery_units(battery));
832 seq_printf(seq, "capacity granularity 2: %d %sh\n",
833 battery->capacity_granularity_2,
834 acpi_battery_units(battery));
835 seq_printf(seq, "model number: %s\n", battery->model_number);
836 seq_printf(seq, "serial number: %s\n", battery->serial_number);
837 seq_printf(seq, "battery type: %s\n", battery->type);
838 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
839 end:
840 if (result)
841 seq_printf(seq, "ERROR: Unable to read battery info\n");
842 return result;
843}
844
845static int acpi_battery_print_state(struct seq_file *seq, int result)
846{
847 struct acpi_battery *battery = seq->private;
848
849 if (result)
850 goto end;
851
852 seq_printf(seq, "present: %s\n",
853 acpi_battery_present(battery) ? "yes" : "no");
854 if (!acpi_battery_present(battery))
855 goto end;
856
857 seq_printf(seq, "capacity state: %s\n",
858 (battery->state & 0x04) ? "critical" : "ok");
859 if ((battery->state & 0x01) && (battery->state & 0x02))
860 seq_printf(seq,
861 "charging state: charging/discharging\n");
862 else if (battery->state & 0x01)
863 seq_printf(seq, "charging state: discharging\n");
864 else if (battery->state & 0x02)
865 seq_printf(seq, "charging state: charging\n");
866 else
867 seq_printf(seq, "charging state: charged\n");
868
869 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
870 seq_printf(seq, "present rate: unknown\n");
871 else
872 seq_printf(seq, "present rate: %d %s\n",
873 battery->rate_now, acpi_battery_units(battery));
874
875 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
876 seq_printf(seq, "remaining capacity: unknown\n");
877 else
878 seq_printf(seq, "remaining capacity: %d %sh\n",
879 battery->capacity_now, acpi_battery_units(battery));
880 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
881 seq_printf(seq, "present voltage: unknown\n");
882 else
883 seq_printf(seq, "present voltage: %d mV\n",
884 battery->voltage_now);
885 end:
886 if (result)
887 seq_printf(seq, "ERROR: Unable to read battery state\n");
888
889 return result;
890}
891
892static int acpi_battery_print_alarm(struct seq_file *seq, int result)
893{
894 struct acpi_battery *battery = seq->private;
895
896 if (result)
897 goto end;
898
899 if (!acpi_battery_present(battery)) {
900 seq_printf(seq, "present: no\n");
901 goto end;
902 }
903 seq_printf(seq, "alarm: ");
904 if (!battery->alarm)
905 seq_printf(seq, "unsupported\n");
906 else
907 seq_printf(seq, "%u %sh\n", battery->alarm,
908 acpi_battery_units(battery));
909 end:
910 if (result)
911 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
912 return result;
913}
914
915static ssize_t acpi_battery_write_alarm(struct file *file,
916 const char __user * buffer,
917 size_t count, loff_t * ppos)
918{
919 int result = 0;
920 char alarm_string[12] = { '\0' };
921 struct seq_file *m = file->private_data;
922 struct acpi_battery *battery = m->private;
923
924 if (!battery || (count > sizeof(alarm_string) - 1))
925 return -EINVAL;
926 if (!acpi_battery_present(battery)) {
927 result = -ENODEV;
928 goto end;
929 }
930 if (copy_from_user(alarm_string, buffer, count)) {
931 result = -EFAULT;
932 goto end;
933 }
934 alarm_string[count] = '\0';
3d915894
CJ		 935 if (kstrtoint(alarm_string, 0, &battery->alarm)) {
936 result = -EINVAL;
937 goto end;
938 }
3a670cc7
LT		 939 result = acpi_battery_set_alarm(battery);
940 end:
941 if (!result)
942 return count;
943 return result;
944}
945
946typedef int(*print_func)(struct seq_file *seq, int result);
947
948static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
949 acpi_battery_print_info,
950 acpi_battery_print_state,
951 acpi_battery_print_alarm,
952};
953
954static int acpi_battery_read(int fid, struct seq_file *seq)
955{
956 struct acpi_battery *battery = seq->private;
9e50bc14 957 int result = acpi_battery_update(battery, false);
3a670cc7
LT		 958 return acpi_print_funcs[fid](seq, result);
959}
960
961#define DECLARE_FILE_FUNCTIONS(_name) \
962static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
963{ \
964 return acpi_battery_read(_name##_tag, seq); \
965} \
966static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
967{ \
968 return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \
969}
970
971DECLARE_FILE_FUNCTIONS(info);
972DECLARE_FILE_FUNCTIONS(state);
973DECLARE_FILE_FUNCTIONS(alarm);
974
975#undef DECLARE_FILE_FUNCTIONS
976
977#define FILE_DESCRIPTION_RO(_name) \
978 { \
979 .name = __stringify(_name), \
980 .mode = S_IRUGO, \
981 .ops = { \
982 .open = acpi_battery_##_name##_open_fs, \
983 .read = seq_read, \
984 .llseek = seq_lseek, \
985 .release = single_release, \
986 .owner = THIS_MODULE, \
987 }, \
988 }
989
990#define FILE_DESCRIPTION_RW(_name) \
991 { \
992 .name = __stringify(_name), \
993 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
994 .ops = { \
995 .open = acpi_battery_##_name##_open_fs, \
996 .read = seq_read, \
997 .llseek = seq_lseek, \
998 .write = acpi_battery_write_##_name, \
999 .release = single_release, \
1000 .owner = THIS_MODULE, \
1001 }, \
1002 }
1003
1004static const struct battery_file {
1005 struct file_operations ops;
1006 umode_t mode;
1007 const char *name;
1008} acpi_battery_file[] = {
1009 FILE_DESCRIPTION_RO(info),
1010 FILE_DESCRIPTION_RO(state),
1011 FILE_DESCRIPTION_RW(alarm),
1012};
1013
1014#undef FILE_DESCRIPTION_RO
1015#undef FILE_DESCRIPTION_RW
1016
1017static int acpi_battery_add_fs(struct acpi_device *device)
1018{
1019 struct proc_dir_entry *entry = NULL;
1020 int i;
1021
1022 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded,"
1023 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
1024 if (!acpi_device_dir(device)) {
1025 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1026 acpi_battery_dir);
1027 if (!acpi_device_dir(device))
1028 return -ENODEV;
1029 }
1030
1031 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
1032 entry = proc_create_data(acpi_battery_file[i].name,
1033 acpi_battery_file[i].mode,
1034 acpi_device_dir(device),
1035 &acpi_battery_file[i].ops,
1036 acpi_driver_data(device));
1037 if (!entry)
1038 return -ENODEV;
1039 }
1040 return 0;
1041}
1042
1043static void acpi_battery_remove_fs(struct acpi_device *device)
1044{
1045 int i;
1046 if (!acpi_device_dir(device))
1047 return;
1048 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
1049 remove_proc_entry(acpi_battery_file[i].name,
1050 acpi_device_dir(device));
1051
1052 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
1053 acpi_device_dir(device) = NULL;
1054}
1055
1056#endif
1057
1da177e4
LT		 1058/* --------------------------------------------------------------------------
1059 Driver Interface
1060 -------------------------------------------------------------------------- */
1061
d9406691 1062static void acpi_battery_notify(struct acpi_device *device, u32 event)
1da177e4 1063{
d9406691 1064 struct acpi_battery *battery = acpi_driver_data(device);
153e500f 1065 struct device *old;
d9406691 1066
1da177e4 1067 if (!battery)
d550d98d 1068 return;
153e500f 1069 old = battery->bat.dev;
f43691c6
AM		 1070 /*
1071 * On Acer Aspire V5-573G notifications are sometimes triggered too
1072 * early. For example, when AC is unplugged and notification is
1073 * triggered, battery state is still reported as "Full", and changes to
1074 * "Discharging" only after short delay, without any notification.
1075 */
1076 if (battery_notification_delay_ms > 0)
1077 msleep(battery_notification_delay_ms);
da8aeb92
RW		 1078 if (event == ACPI_BATTERY_NOTIFY_INFO)
1079 acpi_battery_refresh(battery);
9e50bc14 1080 acpi_battery_update(battery, false);
f1d4661a 1081 acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d 1082 dev_name(&device->dev), event,
9ea7d575 1083 acpi_battery_present(battery));
411e0f77 1084 acpi_notifier_call_chain(device, event, acpi_battery_present(battery));
2345baf4 1085 /* acpi_battery_update could remove power_supply object */
153e500f 1086 if (old && battery->bat.dev)
f79e1cec 1087 power_supply_changed(&battery->bat);
1da177e4
LT		 1088}
1089
25be5821
KM		 1090static int battery_notify(struct notifier_block *nb,
1091 unsigned long mode, void *_unused)
1092{
1093 struct acpi_battery *battery = container_of(nb, struct acpi_battery,
1094 pm_nb);
9e50bc14
LT		 1095 int result;
1096
25be5821 1097 switch (mode) {
d5a5911b 1098 case PM_POST_HIBERNATION:
25be5821 1099 case PM_POST_SUSPEND:
9e50bc14
LT		 1100 if (!acpi_battery_present(battery))
1101 return 0;
1102
1103 if (!battery->bat.dev) {
1104 result = acpi_battery_get_info(battery);
1105 if (result)
1106 return result;
1107
1108 result = sysfs_add_battery(battery);
1109 if (result)
1110 return result;
1111 } else
1112 acpi_battery_refresh(battery);
1113
1114 acpi_battery_init_alarm(battery);
1115 acpi_battery_get_state(battery);
25be5821
KM		 1116 break;
1117 }
1118
1119 return 0;
1120}
1121
3f5dc08f
AM		 1122static int battery_bix_broken_package_quirk(const struct dmi_system_id *d)
1123{
1124 battery_bix_broken_package = 1;
1125 return 0;
1126}
1127
f43691c6
AM		 1128static int battery_notification_delay_quirk(const struct dmi_system_id *d)
1129{
1130 battery_notification_delay_ms = 1000;
1131 return 0;
1132}
1133
a90b4038
LT		 1134static struct dmi_system_id bat_dmi_table[] = {
1135 {
3f5dc08f 1136 .callback = battery_bix_broken_package_quirk,
a90b4038
LT		 1137 .ident = "NEC LZ750/LS",
1138 .matches = {
1139 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1140 DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"),
1141 },
1142 },
f43691c6
AM		 1143 {
1144 .callback = battery_notification_delay_quirk,
1145 .ident = "Acer Aspire V5-573G",
1146 .matches = {
1147 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1148 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
1149 },
1150 },
a90b4038
LT		 1151 {},
1152};
1153
4be44fcd 1154static int acpi_battery_add(struct acpi_device *device)
1da177e4 1155{
4be44fcd 1156 int result = 0;
4be44fcd 1157 struct acpi_battery *battery = NULL;
952c63e9 1158
1da177e4 1159 if (!device)
d550d98d 1160 return -EINVAL;
36bcbec7 1161 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
1da177e4 1162 if (!battery)
d550d98d 1163 return -ENOMEM;
145def84 1164 battery->device = device;
1da177e4
LT		 1165 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
1166 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
db89b4f0 1167 device->driver_data = battery;
038fdea2 1168 mutex_init(&battery->lock);
69d94ec6 1169 mutex_init(&battery->sysfs_lock);
952c63e9 1170 if (acpi_has_method(battery->device->handle, "_BIX"))
c67fcd67 1171 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
9e50bc14 1172 result = acpi_battery_update(battery, false);
eb03cb02
SH		 1173 if (result)
1174 goto fail;
3a670cc7
LT		 1175#ifdef CONFIG_ACPI_PROCFS_POWER
1176 result = acpi_battery_add_fs(device);
1177#endif
1178 if (result) {
1179#ifdef CONFIG_ACPI_PROCFS_POWER
1180 acpi_battery_remove_fs(device);
1181#endif
1182 goto fail;
1183 }
25be5821 1184
e80bba4b
SH		 1185 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
1186 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
1187 device->status.battery_present ? "present" : "absent");
1188
25be5821
KM		 1189 battery->pm_nb.notifier_call = battery_notify;
1190 register_pm_notifier(&battery->pm_nb);
1191
e0d1f09e
ZR		 1192 device_init_wakeup(&device->dev, 1);
1193
d550d98d 1194 return result;
e80bba4b
SH		 1195
1196fail:
1197 sysfs_remove_battery(battery);
1198 mutex_destroy(&battery->lock);
69d94ec6 1199 mutex_destroy(&battery->sysfs_lock);
e80bba4b
SH		 1200 kfree(battery);
1201 return result;
1da177e4
LT		 1202}
1203
51fac838 1204static int acpi_battery_remove(struct acpi_device *device)
1da177e4 1205{
4be44fcd 1206 struct acpi_battery *battery = NULL;
1da177e4 1207
1da177e4 1208 if (!device || !acpi_driver_data(device))
d550d98d 1209 return -EINVAL;
e0d1f09e 1210 device_init_wakeup(&device->dev, 0);
50dd0969 1211 battery = acpi_driver_data(device);
25be5821 1212 unregister_pm_notifier(&battery->pm_nb);
3a670cc7
LT		 1213#ifdef CONFIG_ACPI_PROCFS_POWER
1214 acpi_battery_remove_fs(device);
1215#endif
508df92d 1216 sysfs_remove_battery(battery);
038fdea2 1217 mutex_destroy(&battery->lock);
69d94ec6 1218 mutex_destroy(&battery->sysfs_lock);
1da177e4 1219 kfree(battery);
d550d98d 1220 return 0;
1da177e4
LT		 1221}
1222
90692404 1223#ifdef CONFIG_PM_SLEEP
34c4415a 1224/* this is needed to learn about changes made in suspended state */
a6f50dc8 1225static int acpi_battery_resume(struct device *dev)
34c4415a
JK		 1226{
1227 struct acpi_battery *battery;
a6f50dc8
RW		 1228
1229 if (!dev)
34c4415a 1230 return -EINVAL;
a6f50dc8
RW		 1231
1232 battery = acpi_driver_data(to_acpi_device(dev));
1233 if (!battery)
1234 return -EINVAL;
1235
f1d4661a 1236 battery->update_time = 0;
9e50bc14 1237 acpi_battery_update(battery, true);
b6ce4083 1238 return 0;
34c4415a 1239}
7f6895c6
SK		 1240#else
1241#define acpi_battery_resume NULL
90692404 1242#endif
34c4415a 1243
a6f50dc8
RW		 1244static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume);
1245
aa650bbd
AS		 1246static struct acpi_driver acpi_battery_driver = {
1247 .name = "battery",
1248 .class = ACPI_BATTERY_CLASS,
1249 .ids = battery_device_ids,
d9406691 1250 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
aa650bbd
AS		 1251 .ops = {
1252 .add = acpi_battery_add,
aa650bbd 1253 .remove = acpi_battery_remove,
d9406691 1254 .notify = acpi_battery_notify,
aa650bbd 1255 },
a6f50dc8 1256 .drv.pm = &acpi_battery_pm,
aa650bbd
AS		 1257};
1258
b0cbc861 1259static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
1da177e4 1260{
4d8316d5 1261 if (acpi_disabled)
0f66af53 1262 return;
a90b4038 1263
3f5dc08f 1264 dmi_check_system(bat_dmi_table);
3a670cc7
LT		 1265
1266#ifdef CONFIG_ACPI_PROCFS_POWER
1267 acpi_battery_dir = acpi_lock_battery_dir();
1268 if (!acpi_battery_dir)
1269 return;
1270#endif
1271 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
1272#ifdef CONFIG_ACPI_PROCFS_POWER
1273 acpi_unlock_battery_dir(acpi_battery_dir);
1274#endif
1275 return;
1276 }
1277 return;
0f66af53
AV		 1278}
1279
1280static int __init acpi_battery_init(void)
1281{
1282 async_schedule(acpi_battery_init_async, NULL);
d550d98d 1283 return 0;
1da177e4
LT		 1284}
1285
4be44fcd 1286static void __exit acpi_battery_exit(void)
1da177e4 1287{
1da177e4 1288 acpi_bus_unregister_driver(&acpi_battery_driver);
3a670cc7
LT		 1289#ifdef CONFIG_ACPI_PROCFS_POWER
1290 acpi_unlock_battery_dir(acpi_battery_dir);
1291#endif
1da177e4
LT		 1292}
1293
1da177e4
LT		 1294module_init(acpi_battery_init);
1295module_exit(acpi_battery_exit);
Ubuntu Artful kernel mirror