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tracing: add sched_set_prio tracepoint
[deliverable/linux.git] / drivers / acpi / battery.c
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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 *
1da177e4
LT		 21 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
22 */
23
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/types.h>
f1d4661a 28#include <linux/jiffies.h>
0f66af53 29#include <linux/async.h>
bc76f90b 30#include <linux/dmi.h>
f43691c6 31#include <linux/delay.h>
5a0e3ad6 32#include <linux/slab.h>
25be5821 33#include <linux/suspend.h>
4000e626 34#include <asm/unaligned.h>
d7380965 35
3a670cc7
LT		 36#ifdef CONFIG_ACPI_PROCFS_POWER
37#include <linux/proc_fs.h>
38#include <linux/seq_file.h>
39#include <asm/uaccess.h>
40#endif
41
8b48463f 42#include <linux/acpi.h>
d7380965
AS		 43#include <linux/power_supply.h>
44
f03be352
AM		 45#include "battery.h"
46
a192a958
LB		 47#define PREFIX "ACPI: "
48
1da177e4
LT		 49#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
50
1da177e4 51#define ACPI_BATTERY_DEVICE_NAME "Battery"
1da177e4 52
ae6f6187
LT		 53/* Battery power unit: 0 means mW, 1 means mA */
54#define ACPI_BATTERY_POWER_UNIT_MA 1
55
1ac5aaa6
ZR		 56#define ACPI_BATTERY_STATE_DISCHARGING 0x1
57#define ACPI_BATTERY_STATE_CHARGING 0x2
58#define ACPI_BATTERY_STATE_CRITICAL 0x4
59
1da177e4 60#define _COMPONENT ACPI_BATTERY_COMPONENT
b6ce4083 61
f52fd66d 62ACPI_MODULE_NAME("battery");
1da177e4 63
f52fd66d 64MODULE_AUTHOR("Paul Diefenbaugh");
aa650bbd 65MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
7cda93e0 66MODULE_DESCRIPTION("ACPI Battery Driver");
1da177e4
LT		 67MODULE_LICENSE("GPL");
68
eca21d91 69static async_cookie_t async_cookie;
a90b4038 70static int battery_bix_broken_package;
f43691c6 71static int battery_notification_delay_ms;
f1d4661a
AS		 72static unsigned int cache_time = 1000;
73module_param(cache_time, uint, 0644);
74MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
b6ce4083 75
3a670cc7
LT		 76#ifdef CONFIG_ACPI_PROCFS_POWER
77extern struct proc_dir_entry *acpi_lock_battery_dir(void);
78extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
79
80enum acpi_battery_files {
81 info_tag = 0,
82 state_tag,
83 alarm_tag,
84 ACPI_BATTERY_NUMFILES,
85};
86
87#endif
88
1ba90e3a
TR		 89static const struct acpi_device_id battery_device_ids[] = {
90 {"PNP0C0A", 0},
91 {"", 0},
92};
1ba90e3a 93
aa650bbd 94MODULE_DEVICE_TABLE(acpi, battery_device_ids);
1da177e4 95
7b3bcc4a
AS		 96enum {
97 ACPI_BATTERY_ALARM_PRESENT,
c67fcd67 98 ACPI_BATTERY_XINFO_PRESENT,
557d5868 99 ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
4000e626
KI		 100 /* On Lenovo Thinkpad models from 2010 and 2011, the power unit
101 switches between mWh and mAh depending on whether the system
102 is running on battery or not. When mAh is the unit, most
103 reported values are incorrect and need to be adjusted by
104 10000/design_voltage. Verified on x201, t410, t410s, and x220.
105 Pre-2010 and 2012 models appear to always report in mWh and
106 are thus unaffected (tested with t42, t61, t500, x200, x300,
107 and x230). Also, in mid-2012 Lenovo issued a BIOS update for
108 the 2011 models that fixes the issue (tested on x220 with a
109 post-1.29 BIOS), but as of Nov. 2012, no such update is
110 available for the 2010 models. */
111 ACPI_BATTERY_QUIRK_THINKPAD_MAH,
7b3bcc4a 112};
78490d82 113
1da177e4 114struct acpi_battery {
038fdea2 115 struct mutex lock;
69d94ec6 116 struct mutex sysfs_lock;
297d716f
KK		 117 struct power_supply *bat;
118 struct power_supply_desc bat_desc;
f1d4661a 119 struct acpi_device *device;
25be5821 120 struct notifier_block pm_nb;
f1d4661a 121 unsigned long update_time;
016d5baa 122 int revision;
7faa144a 123 int rate_now;
d7380965
AS		 124 int capacity_now;
125 int voltage_now;
038fdea2 126 int design_capacity;
d7380965 127 int full_charge_capacity;
038fdea2
AS		 128 int technology;
129 int design_voltage;
130 int design_capacity_warning;
131 int design_capacity_low;
c67fcd67
AS		 132 int cycle_count;
133 int measurement_accuracy;
134 int max_sampling_time;
135 int min_sampling_time;
136 int max_averaging_interval;
137 int min_averaging_interval;
038fdea2
AS		 138 int capacity_granularity_1;
139 int capacity_granularity_2;
f1d4661a 140 int alarm;
038fdea2
AS		 141 char model_number[32];
142 char serial_number[32];
143 char type[32];
144 char oem_info[32];
f1d4661a
AS		 145 int state;
146 int power_unit;
7b3bcc4a 147 unsigned long flags;
1da177e4
LT		 148};
149
297d716f 150#define to_acpi_battery(x) power_supply_get_drvdata(x)
d7380965 151
efd941f1 152static inline int acpi_battery_present(struct acpi_battery *battery)
b6ce4083 153{
78490d82
AS		 154 return battery->device->status.battery_present;
155}
038fdea2 156
d7380965
AS		 157static int acpi_battery_technology(struct acpi_battery *battery)
158{
159 if (!strcasecmp("NiCd", battery->type))
160 return POWER_SUPPLY_TECHNOLOGY_NiCd;
161 if (!strcasecmp("NiMH", battery->type))
162 return POWER_SUPPLY_TECHNOLOGY_NiMH;
163 if (!strcasecmp("LION", battery->type))
164 return POWER_SUPPLY_TECHNOLOGY_LION;
ad40e68b 165 if (!strncasecmp("LI-ION", battery->type, 6))
0bde7eee 166 return POWER_SUPPLY_TECHNOLOGY_LION;
d7380965
AS		 167 if (!strcasecmp("LiP", battery->type))
168 return POWER_SUPPLY_TECHNOLOGY_LIPO;
169 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
170}
171
9104476e 172static int acpi_battery_get_state(struct acpi_battery *battery);
b19073a0 173
56f382a0
RH		 174static int acpi_battery_is_charged(struct acpi_battery *battery)
175{
1ac5aaa6 176 /* charging, discharging or critical low */
56f382a0
RH		 177 if (battery->state != 0)
178 return 0;
179
180 /* battery not reporting charge */
181 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
182 battery->capacity_now == 0)
183 return 0;
184
185 /* good batteries update full_charge as the batteries degrade */
186 if (battery->full_charge_capacity == battery->capacity_now)
187 return 1;
188
189 /* fallback to using design values for broken batteries */
190 if (battery->design_capacity == battery->capacity_now)
191 return 1;
192
193 /* we don't do any sort of metric based on percentages */
194 return 0;
195}
196
d7380965
AS		 197static int acpi_battery_get_property(struct power_supply *psy,
198 enum power_supply_property psp,
199 union power_supply_propval *val)
200{
a1b4bd69 201 int ret = 0;
d7380965
AS		 202 struct acpi_battery *battery = to_acpi_battery(psy);
203
9104476e
AS		 204 if (acpi_battery_present(battery)) {
205 /* run battery update only if it is present */
206 acpi_battery_get_state(battery);
207 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
d7380965
AS		 208 return -ENODEV;
209 switch (psp) {
210 case POWER_SUPPLY_PROP_STATUS:
1ac5aaa6 211 if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
d7380965 212 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1ac5aaa6 213 else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
d7380965 214 val->intval = POWER_SUPPLY_STATUS_CHARGING;
56f382a0 215 else if (acpi_battery_is_charged(battery))
d7380965 216 val->intval = POWER_SUPPLY_STATUS_FULL;
4c41d3ad
RD		 217 else
218 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
d7380965
AS		 219 break;
220 case POWER_SUPPLY_PROP_PRESENT:
221 val->intval = acpi_battery_present(battery);
222 break;
223 case POWER_SUPPLY_PROP_TECHNOLOGY:
224 val->intval = acpi_battery_technology(battery);
225 break;
c67fcd67
AS		 226 case POWER_SUPPLY_PROP_CYCLE_COUNT:
227 val->intval = battery->cycle_count;
228 break;
d7380965 229 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
a1b4bd69
RW		 230 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
231 ret = -ENODEV;
232 else
233 val->intval = battery->design_voltage * 1000;
d7380965
AS		 234 break;
235 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
a1b4bd69
RW		 236 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
237 ret = -ENODEV;
238 else
239 val->intval = battery->voltage_now * 1000;
d7380965
AS		 240 break;
241 case POWER_SUPPLY_PROP_CURRENT_NOW:
7faa144a 242 case POWER_SUPPLY_PROP_POWER_NOW:
a1b4bd69
RW		 243 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
244 ret = -ENODEV;
245 else
246 val->intval = battery->rate_now * 1000;
d7380965
AS		 247 break;
248 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
249 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
a1b4bd69
RW		 250 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
251 ret = -ENODEV;
252 else
253 val->intval = battery->design_capacity * 1000;
d7380965
AS		 254 break;
255 case POWER_SUPPLY_PROP_CHARGE_FULL:
256 case POWER_SUPPLY_PROP_ENERGY_FULL:
a1b4bd69
RW		 257 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
258 ret = -ENODEV;
259 else
260 val->intval = battery->full_charge_capacity * 1000;
d7380965
AS		 261 break;
262 case POWER_SUPPLY_PROP_CHARGE_NOW:
263 case POWER_SUPPLY_PROP_ENERGY_NOW:
a1b4bd69
RW		 264 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
265 ret = -ENODEV;
266 else
267 val->intval = battery->capacity_now * 1000;
d7380965 268 break;
a58e1150 269 case POWER_SUPPLY_PROP_CAPACITY:
270 if (battery->capacity_now && battery->full_charge_capacity)
271 val->intval = battery->capacity_now * 100/
272 battery->full_charge_capacity;
273 else
274 val->intval = 0;
275 break;
1ac5aaa6
ZR		 276 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
277 if (battery->state & ACPI_BATTERY_STATE_CRITICAL)
278 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
279 else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
280 (battery->capacity_now <= battery->alarm))
281 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
282 else if (acpi_battery_is_charged(battery))
283 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
284 else
285 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
286 break;
d7380965
AS		 287 case POWER_SUPPLY_PROP_MODEL_NAME:
288 val->strval = battery->model_number;
289 break;
290 case POWER_SUPPLY_PROP_MANUFACTURER:
291 val->strval = battery->oem_info;
292 break;
7c2670bb 293 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
294 val->strval = battery->serial_number;
295 break;
d7380965 296 default:
a1b4bd69 297 ret = -EINVAL;
d7380965 298 }
a1b4bd69 299 return ret;
d7380965
AS		 300}
301
302static enum power_supply_property charge_battery_props[] = {
303 POWER_SUPPLY_PROP_STATUS,
304 POWER_SUPPLY_PROP_PRESENT,
305 POWER_SUPPLY_PROP_TECHNOLOGY,
c67fcd67 306 POWER_SUPPLY_PROP_CYCLE_COUNT,
d7380965
AS		 307 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
308 POWER_SUPPLY_PROP_VOLTAGE_NOW,
309 POWER_SUPPLY_PROP_CURRENT_NOW,
310 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
311 POWER_SUPPLY_PROP_CHARGE_FULL,
312 POWER_SUPPLY_PROP_CHARGE_NOW,
a58e1150 313 POWER_SUPPLY_PROP_CAPACITY,
1ac5aaa6 314 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
d7380965
AS		 315 POWER_SUPPLY_PROP_MODEL_NAME,
316 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 317 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965
AS		 318};
319
320static enum power_supply_property energy_battery_props[] = {
321 POWER_SUPPLY_PROP_STATUS,
322 POWER_SUPPLY_PROP_PRESENT,
323 POWER_SUPPLY_PROP_TECHNOLOGY,
c67fcd67 324 POWER_SUPPLY_PROP_CYCLE_COUNT,
d7380965
AS		 325 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
326 POWER_SUPPLY_PROP_VOLTAGE_NOW,
7faa144a 327 POWER_SUPPLY_PROP_POWER_NOW,
d7380965
AS		 328 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
329 POWER_SUPPLY_PROP_ENERGY_FULL,
330 POWER_SUPPLY_PROP_ENERGY_NOW,
a58e1150 331 POWER_SUPPLY_PROP_CAPACITY,
1ac5aaa6 332 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
d7380965
AS		 333 POWER_SUPPLY_PROP_MODEL_NAME,
334 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 335 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965
AS		 336};
337
78490d82
AS		 338/* --------------------------------------------------------------------------
339 Battery Management
340 -------------------------------------------------------------------------- */
038fdea2
AS		 341struct acpi_offsets {
342 size_t offset; /* offset inside struct acpi_sbs_battery */
343 u8 mode; /* int or string? */
344};
b6ce4083 345
a4658784 346static const struct acpi_offsets state_offsets[] = {
038fdea2 347 {offsetof(struct acpi_battery, state), 0},
7faa144a 348 {offsetof(struct acpi_battery, rate_now), 0},
d7380965
AS		 349 {offsetof(struct acpi_battery, capacity_now), 0},
350 {offsetof(struct acpi_battery, voltage_now), 0},
038fdea2 351};
b6ce4083 352
a4658784 353static const struct acpi_offsets info_offsets[] = {
038fdea2
AS		 354 {offsetof(struct acpi_battery, power_unit), 0},
355 {offsetof(struct acpi_battery, design_capacity), 0},
d7380965 356 {offsetof(struct acpi_battery, full_charge_capacity), 0},
038fdea2
AS		 357 {offsetof(struct acpi_battery, technology), 0},
358 {offsetof(struct acpi_battery, design_voltage), 0},
359 {offsetof(struct acpi_battery, design_capacity_warning), 0},
360 {offsetof(struct acpi_battery, design_capacity_low), 0},
361 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
362 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
363 {offsetof(struct acpi_battery, model_number), 1},
364 {offsetof(struct acpi_battery, serial_number), 1},
365 {offsetof(struct acpi_battery, type), 1},
366 {offsetof(struct acpi_battery, oem_info), 1},
367};
b6ce4083 368
a4658784 369static const struct acpi_offsets extended_info_offsets[] = {
016d5baa 370 {offsetof(struct acpi_battery, revision), 0},
c67fcd67
AS		 371 {offsetof(struct acpi_battery, power_unit), 0},
372 {offsetof(struct acpi_battery, design_capacity), 0},
373 {offsetof(struct acpi_battery, full_charge_capacity), 0},
374 {offsetof(struct acpi_battery, technology), 0},
375 {offsetof(struct acpi_battery, design_voltage), 0},
376 {offsetof(struct acpi_battery, design_capacity_warning), 0},
377 {offsetof(struct acpi_battery, design_capacity_low), 0},
378 {offsetof(struct acpi_battery, cycle_count), 0},
379 {offsetof(struct acpi_battery, measurement_accuracy), 0},
380 {offsetof(struct acpi_battery, max_sampling_time), 0},
381 {offsetof(struct acpi_battery, min_sampling_time), 0},
382 {offsetof(struct acpi_battery, max_averaging_interval), 0},
383 {offsetof(struct acpi_battery, min_averaging_interval), 0},
384 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
385 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
386 {offsetof(struct acpi_battery, model_number), 1},
387 {offsetof(struct acpi_battery, serial_number), 1},
388 {offsetof(struct acpi_battery, type), 1},
389 {offsetof(struct acpi_battery, oem_info), 1},
390};
391
038fdea2
AS		 392static int extract_package(struct acpi_battery *battery,
393 union acpi_object *package,
a4658784 394 const struct acpi_offsets *offsets, int num)
038fdea2 395{
106449e8 396 int i;
038fdea2
AS		 397 union acpi_object *element;
398 if (package->type != ACPI_TYPE_PACKAGE)
399 return -EFAULT;
400 for (i = 0; i < num; ++i) {
401 if (package->package.count <= i)
402 return -EFAULT;
403 element = &package->package.elements[i];
404 if (offsets[i].mode) {
106449e8
AS		 405 u8 *ptr = (u8 *)battery + offsets[i].offset;
406 if (element->type == ACPI_TYPE_STRING ||
407 element->type == ACPI_TYPE_BUFFER)
408 strncpy(ptr, element->string.pointer, 32);
409 else if (element->type == ACPI_TYPE_INTEGER) {
410 strncpy(ptr, (u8 *)&element->integer.value,
439913ff
LM		 411 sizeof(u64));
412 ptr[sizeof(u64)] = 0;
b8a1bdb1
AS		 413 } else
414 *ptr = 0; /* don't have value */
038fdea2 415 } else {
b8a1bdb1
AS		 416 int *x = (int *)((u8 *)battery + offsets[i].offset);
417 *x = (element->type == ACPI_TYPE_INTEGER) ?
418 element->integer.value : -1;
038fdea2 419 }
b6ce4083 420 }
b6ce4083
VL		 421 return 0;
422}
423
424static int acpi_battery_get_status(struct acpi_battery *battery)
425{
aa650bbd 426 if (acpi_bus_get_status(battery->device)) {
b6ce4083
VL		 427 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
428 return -ENODEV;
429 }
aa650bbd 430 return 0;
b6ce4083
VL		 431}
432
433static int acpi_battery_get_info(struct acpi_battery *battery)
1da177e4 434{
aa650bbd 435 int result = -EFAULT;
4be44fcd 436 acpi_status status = 0;
0f4c6547 437 char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ?
c67fcd67
AS		 438 "_BIX" : "_BIF";
439
4be44fcd 440 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 441
b6ce4083
VL		 442 if (!acpi_battery_present(battery))
443 return 0;
038fdea2 444 mutex_lock(&battery->lock);
c67fcd67
AS		 445 status = acpi_evaluate_object(battery->device->handle, name,
446 NULL, &buffer);
038fdea2 447 mutex_unlock(&battery->lock);
aa650bbd 448
1da177e4 449 if (ACPI_FAILURE(status)) {
c67fcd67 450 ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name));
d550d98d 451 return -ENODEV;
1da177e4 452 }
a90b4038
LT		 453
454 if (battery_bix_broken_package)
455 result = extract_package(battery, buffer.pointer,
456 extended_info_offsets + 1,
457 ARRAY_SIZE(extended_info_offsets) - 1);
458 else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags))
c67fcd67
AS		 459 result = extract_package(battery, buffer.pointer,
460 extended_info_offsets,
461 ARRAY_SIZE(extended_info_offsets));
462 else
463 result = extract_package(battery, buffer.pointer,
464 info_offsets, ARRAY_SIZE(info_offsets));
78490d82 465 kfree(buffer.pointer);
557d5868
ZR		 466 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
467 battery->full_charge_capacity = battery->design_capacity;
4000e626
KI		 468 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
469 battery->power_unit && battery->design_voltage) {
470 battery->design_capacity = battery->design_capacity *
471 10000 / battery->design_voltage;
472 battery->full_charge_capacity = battery->full_charge_capacity *
473 10000 / battery->design_voltage;
474 battery->design_capacity_warning =
475 battery->design_capacity_warning *
476 10000 / battery->design_voltage;
477 /* Curiously, design_capacity_low, unlike the rest of them,
478 is correct. */
479 /* capacity_granularity_* equal 1 on the systems tested, so
480 it's impossible to tell if they would need an adjustment
481 or not if their values were higher. */
482 }
d550d98d 483 return result;
1da177e4
LT		 484}
485
b6ce4083 486static int acpi_battery_get_state(struct acpi_battery *battery)
1da177e4 487{
4be44fcd
LB		 488 int result = 0;
489 acpi_status status = 0;
490 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 491
b6ce4083
VL		 492 if (!acpi_battery_present(battery))
493 return 0;
1da177e4 494
f1d4661a
AS		 495 if (battery->update_time &&
496 time_before(jiffies, battery->update_time +
497 msecs_to_jiffies(cache_time)))
498 return 0;
499
038fdea2 500 mutex_lock(&battery->lock);
f1d4661a 501 status = acpi_evaluate_object(battery->device->handle, "_BST",
038fdea2
AS		 502 NULL, &buffer);
503 mutex_unlock(&battery->lock);
5b31d895 504
1da177e4 505 if (ACPI_FAILURE(status)) {
a6fc6720 506 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
d550d98d 507 return -ENODEV;
1da177e4 508 }
aa650bbd 509
038fdea2
AS		 510 result = extract_package(battery, buffer.pointer,
511 state_offsets, ARRAY_SIZE(state_offsets));
f1d4661a 512 battery->update_time = jiffies;
78490d82 513 kfree(buffer.pointer);
bc76f90b 514
55003b21
LT		 515 /* For buggy DSDTs that report negative 16-bit values for either
516 * charging or discharging current and/or report 0 as 65536
517 * due to bad math.
518 */
519 if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA &&
520 battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN &&
521 (s16)(battery->rate_now) < 0) {
bc76f90b 522 battery->rate_now = abs((s16)battery->rate_now);
9237516c
MK		 523 printk_once(KERN_WARNING FW_BUG
524 "battery: (dis)charge rate invalid.\n");
55003b21 525 }
bc76f90b 526
557d5868
ZR		 527 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
528 && battery->capacity_now >= 0 && battery->capacity_now <= 100)
529 battery->capacity_now = (battery->capacity_now *
530 battery->full_charge_capacity) / 100;
4000e626
KI		 531 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
532 battery->power_unit && battery->design_voltage) {
533 battery->capacity_now = battery->capacity_now *
534 10000 / battery->design_voltage;
535 }
b6ce4083
VL		 536 return result;
537}
1da177e4 538
aa650bbd 539static int acpi_battery_set_alarm(struct acpi_battery *battery)
1da177e4 540{
4be44fcd 541 acpi_status status = 0;
1da177e4 542
c67fcd67 543 if (!acpi_battery_present(battery) ||
7b3bcc4a 544 !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
d550d98d 545 return -ENODEV;
1da177e4 546
038fdea2 547 mutex_lock(&battery->lock);
0db98202
JL		 548 status = acpi_execute_simple_method(battery->device->handle, "_BTP",
549 battery->alarm);
038fdea2 550 mutex_unlock(&battery->lock);
aa650bbd 551
1da177e4 552 if (ACPI_FAILURE(status))
d550d98d 553 return -ENODEV;
1da177e4 554
aa650bbd 555 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
d550d98d 556 return 0;
1da177e4
LT		 557}
558
b6ce4083 559static int acpi_battery_init_alarm(struct acpi_battery *battery)
1da177e4 560{
b6ce4083 561 /* See if alarms are supported, and if so, set default */
952c63e9 562 if (!acpi_has_method(battery->device->handle, "_BTP")) {
7b3bcc4a 563 clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a 564 return 0;
b6ce4083 565 }
7b3bcc4a 566 set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a
AS		 567 if (!battery->alarm)
568 battery->alarm = battery->design_capacity_warning;
aa650bbd 569 return acpi_battery_set_alarm(battery);
b6ce4083 570}
1da177e4 571
508df92d
AB		 572static ssize_t acpi_battery_alarm_show(struct device *dev,
573 struct device_attribute *attr,
574 char *buf)
575{
576 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
577 return sprintf(buf, "%d\n", battery->alarm * 1000);
578}
579
580static ssize_t acpi_battery_alarm_store(struct device *dev,
581 struct device_attribute *attr,
582 const char *buf, size_t count)
583{
584 unsigned long x;
585 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
47a08c85 586 if (sscanf(buf, "%lu\n", &x) == 1)
508df92d
AB		 587 battery->alarm = x/1000;
588 if (acpi_battery_present(battery))
589 acpi_battery_set_alarm(battery);
590 return count;
591}
592
593static struct device_attribute alarm_attr = {
01e8ef11 594 .attr = {.name = "alarm", .mode = 0644},
508df92d
AB		 595 .show = acpi_battery_alarm_show,
596 .store = acpi_battery_alarm_store,
597};
598
599static int sysfs_add_battery(struct acpi_battery *battery)
600{
297d716f 601 struct power_supply_config psy_cfg = { .drv_data = battery, };
508df92d 602
ae6f6187 603 if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
297d716f
KK		 604 battery->bat_desc.properties = charge_battery_props;
605 battery->bat_desc.num_properties =
508df92d
AB		 606 ARRAY_SIZE(charge_battery_props);
607 } else {
297d716f
KK		 608 battery->bat_desc.properties = energy_battery_props;
609 battery->bat_desc.num_properties =
508df92d
AB		 610 ARRAY_SIZE(energy_battery_props);
611 }
612
297d716f
KK		 613 battery->bat_desc.name = acpi_device_bid(battery->device);
614 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
615 battery->bat_desc.get_property = acpi_battery_get_property;
508df92d 616
297d716f
KK		 617 battery->bat = power_supply_register_no_ws(&battery->device->dev,
618 &battery->bat_desc, &psy_cfg);
e0d1f09e 619
297d716f
KK		 620 if (IS_ERR(battery->bat)) {
621 int result = PTR_ERR(battery->bat);
622
623 battery->bat = NULL;
508df92d 624 return result;
297d716f
KK		 625 }
626 return device_create_file(&battery->bat->dev, &alarm_attr);
508df92d
AB		 627}
628
629static void sysfs_remove_battery(struct acpi_battery *battery)
630{
69d94ec6 631 mutex_lock(&battery->sysfs_lock);
297d716f 632 if (!battery->bat) {
69d94ec6 633 mutex_unlock(&battery->sysfs_lock);
508df92d 634 return;
9c921c22
LT		 635 }
636
297d716f
KK		 637 device_remove_file(&battery->bat->dev, &alarm_attr);
638 power_supply_unregister(battery->bat);
639 battery->bat = NULL;
69d94ec6 640 mutex_unlock(&battery->sysfs_lock);
bc76f90b
HM		 641}
642
4000e626
KI		 643static void find_battery(const struct dmi_header *dm, void *private)
644{
645 struct acpi_battery *battery = (struct acpi_battery *)private;
646 /* Note: the hardcoded offsets below have been extracted from
647 the source code of dmidecode. */
648 if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) {
649 const u8 *dmi_data = (const u8 *)(dm + 1);
650 int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6));
651 if (dm->length >= 18)
652 dmi_capacity *= dmi_data[17];
653 if (battery->design_capacity * battery->design_voltage / 1000
654 != dmi_capacity &&
655 battery->design_capacity * 10 == dmi_capacity)
656 set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
657 &battery->flags);
658 }
659}
660
557d5868
ZR		 661/*
662 * According to the ACPI spec, some kinds of primary batteries can
663 * report percentage battery remaining capacity directly to OS.
664 * In this case, it reports the Last Full Charged Capacity == 100
665 * and BatteryPresentRate == 0xFFFFFFFF.
666 *
667 * Now we found some battery reports percentage remaining capacity
668 * even if it's rechargeable.
669 * https://bugzilla.kernel.org/show_bug.cgi?id=15979
670 *
671 * Handle this correctly so that they won't break userspace.
672 */
7b78622d 673static void acpi_battery_quirks(struct acpi_battery *battery)
557d5868
ZR		 674{
675 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
0f4c6547 676 return;
557d5868 677
0f4c6547
NM		 678 if (battery->full_charge_capacity == 100 &&
679 battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN &&
680 battery->capacity_now >= 0 && battery->capacity_now <= 100) {
557d5868
ZR		 681 set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags);
682 battery->full_charge_capacity = battery->design_capacity;
683 battery->capacity_now = (battery->capacity_now *
684 battery->full_charge_capacity) / 100;
685 }
4000e626
KI		 686
687 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags))
0f4c6547 688 return;
4000e626
KI		 689
690 if (battery->power_unit && dmi_name_in_vendors("LENOVO")) {
691 const char *s;
692 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
ffd8a731 693 if (s && !strncasecmp(s, "ThinkPad", 8)) {
4000e626
KI		 694 dmi_walk(find_battery, battery);
695 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
696 &battery->flags) &&
697 battery->design_voltage) {
698 battery->design_capacity =
699 battery->design_capacity *
700 10000 / battery->design_voltage;
701 battery->full_charge_capacity =
702 battery->full_charge_capacity *
703 10000 / battery->design_voltage;
704 battery->design_capacity_warning =
705 battery->design_capacity_warning *
706 10000 / battery->design_voltage;
707 battery->capacity_now = battery->capacity_now *
708 10000 / battery->design_voltage;
709 }
710 }
711 }
557d5868
ZR		 712}
713
9e50bc14 714static int acpi_battery_update(struct acpi_battery *battery, bool resume)
b6ce4083 715{
50b17851 716 int result, old_present = acpi_battery_present(battery);
97749cd9 717 result = acpi_battery_get_status(battery);
508df92d 718 if (result)
b6ce4083 719 return result;
508df92d
AB		 720 if (!acpi_battery_present(battery)) {
721 sysfs_remove_battery(battery);
97749cd9 722 battery->update_time = 0;
508df92d 723 return 0;
b6ce4083 724 }
9e50bc14
LT		 725
726 if (resume)
727 return 0;
728
50b17851
AS		 729 if (!battery->update_time ||
730 old_present != acpi_battery_present(battery)) {
97749cd9
AS		 731 result = acpi_battery_get_info(battery);
732 if (result)
733 return result;
734 acpi_battery_init_alarm(battery);
735 }
297d716f 736 if (!battery->bat) {
eb03cb02
SH		 737 result = sysfs_add_battery(battery);
738 if (result)
739 return result;
740 }
557d5868 741 result = acpi_battery_get_state(battery);
e0d1f09e
ZR		 742 if (result)
743 return result;
7b78622d 744 acpi_battery_quirks(battery);
e0d1f09e
ZR		 745
746 /*
747 * Wakeup the system if battery is critical low
748 * or lower than the alarm level
749 */
750 if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) ||
751 (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
752 (battery->capacity_now <= battery->alarm)))
753 pm_wakeup_event(&battery->device->dev, 0);
754
557d5868 755 return result;
4bd35cdb
VL		 756}
757
da8aeb92
RW		 758static void acpi_battery_refresh(struct acpi_battery *battery)
759{
c5971456
AW		 760 int power_unit;
761
297d716f 762 if (!battery->bat)
da8aeb92
RW		 763 return;
764
c5971456
AW		 765 power_unit = battery->power_unit;
766
da8aeb92 767 acpi_battery_get_info(battery);
c5971456
AW		 768
769 if (power_unit == battery->power_unit)
770 return;
771
772 /* The battery has changed its reporting units. */
da8aeb92
RW		 773 sysfs_remove_battery(battery);
774 sysfs_add_battery(battery);
775}
776
3a670cc7
LT		 777/* --------------------------------------------------------------------------
778 FS Interface (/proc)
779 -------------------------------------------------------------------------- */
780
781#ifdef CONFIG_ACPI_PROCFS_POWER
782static struct proc_dir_entry *acpi_battery_dir;
783
27059b91
MK		 784static const char *acpi_battery_units(const struct acpi_battery *battery)
785{
786 return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ?
787 "mA" : "mW";
788}
789
3a670cc7
LT		 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);
297d716f 1066 struct power_supply *old;
d9406691 1067
1da177e4 1068 if (!battery)
d550d98d 1069 return;
297d716f 1070 old = battery->bat;
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 */
297d716f
KK		 1087 if (old && battery->bat)
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
31f7dc79 1104 if (!battery->bat) {
9e50bc14
LT		 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
048d16da
MK		 1123static int __init
1124battery_bix_broken_package_quirk(const struct dmi_system_id *d)
3f5dc08f
AM		 1125{
1126 battery_bix_broken_package = 1;
1127 return 0;
1128}
1129
048d16da
MK		 1130static int __init
1131battery_notification_delay_quirk(const struct dmi_system_id *d)
f43691c6
AM		 1132{
1133 battery_notification_delay_ms = 1000;
1134 return 0;
1135}
1136
048d16da 1137static const struct dmi_system_id bat_dmi_table[] __initconst = {
a90b4038 1138 {
3f5dc08f 1139 .callback = battery_bix_broken_package_quirk,
a90b4038
LT		 1140 .ident = "NEC LZ750/LS",
1141 .matches = {
1142 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1143 DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"),
1144 },
1145 },
f43691c6
AM		 1146 {
1147 .callback = battery_notification_delay_quirk,
1148 .ident = "Acer Aspire V5-573G",
1149 .matches = {
1150 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1151 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
1152 },
1153 },
a90b4038
LT		 1154 {},
1155};
1156
75646e75
LT		 1157/*
1158 * Some machines'(E,G Lenovo Z480) ECs are not stable
1159 * during boot up and this causes battery driver fails to be
1160 * probed due to failure of getting battery information
1161 * from EC sometimes. After several retries, the operation
1162 * may work. So add retry code here and 20ms sleep between
1163 * every retries.
1164 */
1165static int acpi_battery_update_retry(struct acpi_battery *battery)
1166{
1167 int retry, ret;
1168
1169 for (retry = 5; retry; retry--) {
1170 ret = acpi_battery_update(battery, false);
1171 if (!ret)
1172 break;
1173
1174 msleep(20);
1175 }
1176 return ret;
1177}
1178
4be44fcd 1179static int acpi_battery_add(struct acpi_device *device)
1da177e4 1180{
4be44fcd 1181 int result = 0;
4be44fcd 1182 struct acpi_battery *battery = NULL;
952c63e9 1183
1da177e4 1184 if (!device)
d550d98d 1185 return -EINVAL;
40e7fcb1
LT		 1186
1187 if (device->dep_unmet)
1188 return -EPROBE_DEFER;
1189
36bcbec7 1190 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
1da177e4 1191 if (!battery)
d550d98d 1192 return -ENOMEM;
145def84 1193 battery->device = device;
1da177e4
LT		 1194 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
1195 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
db89b4f0 1196 device->driver_data = battery;
038fdea2 1197 mutex_init(&battery->lock);
69d94ec6 1198 mutex_init(&battery->sysfs_lock);
952c63e9 1199 if (acpi_has_method(battery->device->handle, "_BIX"))
c67fcd67 1200 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
75646e75
LT		 1201
1202 result = acpi_battery_update_retry(battery);
eb03cb02
SH		 1203 if (result)
1204 goto fail;
75646e75 1205
3a670cc7
LT		 1206#ifdef CONFIG_ACPI_PROCFS_POWER
1207 result = acpi_battery_add_fs(device);
1208#endif
1209 if (result) {
1210#ifdef CONFIG_ACPI_PROCFS_POWER
1211 acpi_battery_remove_fs(device);
1212#endif
1213 goto fail;
1214 }
25be5821 1215
e80bba4b
SH		 1216 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
1217 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
1218 device->status.battery_present ? "present" : "absent");
1219
25be5821
KM		 1220 battery->pm_nb.notifier_call = battery_notify;
1221 register_pm_notifier(&battery->pm_nb);
1222
e0d1f09e
ZR		 1223 device_init_wakeup(&device->dev, 1);
1224
d550d98d 1225 return result;
e80bba4b
SH		 1226
1227fail:
1228 sysfs_remove_battery(battery);
1229 mutex_destroy(&battery->lock);
69d94ec6 1230 mutex_destroy(&battery->sysfs_lock);
e80bba4b
SH		 1231 kfree(battery);
1232 return result;
1da177e4
LT		 1233}
1234
51fac838 1235static int acpi_battery_remove(struct acpi_device *device)
1da177e4 1236{
4be44fcd 1237 struct acpi_battery *battery = NULL;
1da177e4 1238
1da177e4 1239 if (!device || !acpi_driver_data(device))
d550d98d 1240 return -EINVAL;
e0d1f09e 1241 device_init_wakeup(&device->dev, 0);
50dd0969 1242 battery = acpi_driver_data(device);
25be5821 1243 unregister_pm_notifier(&battery->pm_nb);
3a670cc7
LT		 1244#ifdef CONFIG_ACPI_PROCFS_POWER
1245 acpi_battery_remove_fs(device);
1246#endif
508df92d 1247 sysfs_remove_battery(battery);
038fdea2 1248 mutex_destroy(&battery->lock);
69d94ec6 1249 mutex_destroy(&battery->sysfs_lock);
1da177e4 1250 kfree(battery);
d550d98d 1251 return 0;
1da177e4
LT		 1252}
1253
90692404 1254#ifdef CONFIG_PM_SLEEP
34c4415a 1255/* this is needed to learn about changes made in suspended state */
a6f50dc8 1256static int acpi_battery_resume(struct device *dev)
34c4415a
JK		 1257{
1258 struct acpi_battery *battery;
a6f50dc8
RW		 1259
1260 if (!dev)
34c4415a 1261 return -EINVAL;
a6f50dc8
RW		 1262
1263 battery = acpi_driver_data(to_acpi_device(dev));
1264 if (!battery)
1265 return -EINVAL;
1266
f1d4661a 1267 battery->update_time = 0;
9e50bc14 1268 acpi_battery_update(battery, true);
b6ce4083 1269 return 0;
34c4415a 1270}
7f6895c6
SK		 1271#else
1272#define acpi_battery_resume NULL
90692404 1273#endif
34c4415a 1274
a6f50dc8
RW		 1275static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume);
1276
aa650bbd
AS		 1277static struct acpi_driver acpi_battery_driver = {
1278 .name = "battery",
1279 .class = ACPI_BATTERY_CLASS,
1280 .ids = battery_device_ids,
d9406691 1281 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
aa650bbd
AS		 1282 .ops = {
1283 .add = acpi_battery_add,
aa650bbd 1284 .remove = acpi_battery_remove,
d9406691 1285 .notify = acpi_battery_notify,
aa650bbd 1286 },
a6f50dc8 1287 .drv.pm = &acpi_battery_pm,
aa650bbd
AS		 1288};
1289
b0cbc861 1290static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
1da177e4 1291{
479faaf0
LH		 1292 int result;
1293
3f5dc08f 1294 dmi_check_system(bat_dmi_table);
479faaf0 1295
3a670cc7
LT		 1296#ifdef CONFIG_ACPI_PROCFS_POWER
1297 acpi_battery_dir = acpi_lock_battery_dir();
1298 if (!acpi_battery_dir)
1299 return;
1300#endif
479faaf0 1301 result = acpi_bus_register_driver(&acpi_battery_driver);
3a670cc7 1302#ifdef CONFIG_ACPI_PROCFS_POWER
479faaf0 1303 if (result < 0)
3a670cc7
LT		 1304 acpi_unlock_battery_dir(acpi_battery_dir);
1305#endif
0f66af53
AV		 1306}
1307
1308static int __init acpi_battery_init(void)
1309{
e234b074
LH		 1310 if (acpi_disabled)
1311 return -ENODEV;
1312
eca21d91 1313 async_cookie = async_schedule(acpi_battery_init_async, NULL);
d550d98d 1314 return 0;
1da177e4
LT		 1315}
1316
4be44fcd 1317static void __exit acpi_battery_exit(void)
1da177e4 1318{
eca21d91 1319 async_synchronize_cookie(async_cookie);
1da177e4 1320 acpi_bus_unregister_driver(&acpi_battery_driver);
3a670cc7
LT		 1321#ifdef CONFIG_ACPI_PROCFS_POWER
1322 acpi_unlock_battery_dir(acpi_battery_dir);
1323#endif
1da177e4
LT		 1324}
1325
1da177e4
LT		 1326module_init(acpi_battery_init);
1327module_exit(acpi_battery_exit);
Linux kernel - Deliverables
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