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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> | |
7c0f6ba6 | 39 | #include <linux/uaccess.h> |
3a670cc7 LT |
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 | 62 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 63 | |
f52fd66d | 64 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 65 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 66 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
67 | MODULE_LICENSE("GPL"); |
68 | ||
eca21d91 | 69 | static async_cookie_t async_cookie; |
bc39fbcf | 70 | static bool battery_driver_registered; |
a90b4038 | 71 | static int battery_bix_broken_package; |
f43691c6 | 72 | static int battery_notification_delay_ms; |
bed42280 | 73 | static int battery_full_discharging; |
f1d4661a AS |
74 | static unsigned int cache_time = 1000; |
75 | module_param(cache_time, uint, 0644); | |
76 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 77 | |
3a670cc7 LT |
78 | #ifdef CONFIG_ACPI_PROCFS_POWER |
79 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); | |
80 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
81 | ||
82 | enum acpi_battery_files { | |
83 | info_tag = 0, | |
84 | state_tag, | |
85 | alarm_tag, | |
86 | ACPI_BATTERY_NUMFILES, | |
87 | }; | |
88 | ||
89 | #endif | |
90 | ||
1ba90e3a TR |
91 | static const struct acpi_device_id battery_device_ids[] = { |
92 | {"PNP0C0A", 0}, | |
93 | {"", 0}, | |
94 | }; | |
1ba90e3a | 95 | |
aa650bbd | 96 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 97 | |
dccfae6d HG |
98 | /* Lists of PMIC ACPI HIDs with an (often better) native battery driver */ |
99 | static const char * const acpi_battery_blacklist[] = { | |
100 | "INT33F4", /* X-Powers AXP288 PMIC */ | |
101 | }; | |
102 | ||
7b3bcc4a AS |
103 | enum { |
104 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 105 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 106 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
107 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
108 | switches between mWh and mAh depending on whether the system | |
109 | is running on battery or not. When mAh is the unit, most | |
110 | reported values are incorrect and need to be adjusted by | |
111 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
112 | Pre-2010 and 2012 models appear to always report in mWh and | |
113 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
114 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
115 | the 2011 models that fixes the issue (tested on x220 with a | |
116 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
117 | available for the 2010 models. */ | |
118 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
7b3bcc4a | 119 | }; |
78490d82 | 120 | |
1da177e4 | 121 | struct acpi_battery { |
038fdea2 | 122 | struct mutex lock; |
69d94ec6 | 123 | struct mutex sysfs_lock; |
297d716f KK |
124 | struct power_supply *bat; |
125 | struct power_supply_desc bat_desc; | |
f1d4661a | 126 | struct acpi_device *device; |
25be5821 | 127 | struct notifier_block pm_nb; |
f1d4661a | 128 | unsigned long update_time; |
016d5baa | 129 | int revision; |
7faa144a | 130 | int rate_now; |
d7380965 AS |
131 | int capacity_now; |
132 | int voltage_now; | |
038fdea2 | 133 | int design_capacity; |
d7380965 | 134 | int full_charge_capacity; |
038fdea2 AS |
135 | int technology; |
136 | int design_voltage; | |
137 | int design_capacity_warning; | |
138 | int design_capacity_low; | |
c67fcd67 AS |
139 | int cycle_count; |
140 | int measurement_accuracy; | |
141 | int max_sampling_time; | |
142 | int min_sampling_time; | |
143 | int max_averaging_interval; | |
144 | int min_averaging_interval; | |
038fdea2 AS |
145 | int capacity_granularity_1; |
146 | int capacity_granularity_2; | |
f1d4661a | 147 | int alarm; |
038fdea2 AS |
148 | char model_number[32]; |
149 | char serial_number[32]; | |
150 | char type[32]; | |
151 | char oem_info[32]; | |
f1d4661a AS |
152 | int state; |
153 | int power_unit; | |
7b3bcc4a | 154 | unsigned long flags; |
1da177e4 LT |
155 | }; |
156 | ||
297d716f | 157 | #define to_acpi_battery(x) power_supply_get_drvdata(x) |
d7380965 | 158 | |
efd941f1 | 159 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 160 | { |
78490d82 AS |
161 | return battery->device->status.battery_present; |
162 | } | |
038fdea2 | 163 | |
d7380965 AS |
164 | static int acpi_battery_technology(struct acpi_battery *battery) |
165 | { | |
166 | if (!strcasecmp("NiCd", battery->type)) | |
167 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
168 | if (!strcasecmp("NiMH", battery->type)) | |
169 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
170 | if (!strcasecmp("LION", battery->type)) | |
171 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 172 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 173 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
174 | if (!strcasecmp("LiP", battery->type)) |
175 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
176 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
177 | } | |
178 | ||
9104476e | 179 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 180 | |
56f382a0 RH |
181 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
182 | { | |
1ac5aaa6 | 183 | /* charging, discharging or critical low */ |
56f382a0 RH |
184 | if (battery->state != 0) |
185 | return 0; | |
186 | ||
187 | /* battery not reporting charge */ | |
188 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
189 | battery->capacity_now == 0) | |
190 | return 0; | |
191 | ||
192 | /* good batteries update full_charge as the batteries degrade */ | |
193 | if (battery->full_charge_capacity == battery->capacity_now) | |
194 | return 1; | |
195 | ||
196 | /* fallback to using design values for broken batteries */ | |
197 | if (battery->design_capacity == battery->capacity_now) | |
198 | return 1; | |
199 | ||
200 | /* we don't do any sort of metric based on percentages */ | |
201 | return 0; | |
202 | } | |
203 | ||
d7380965 AS |
204 | static int acpi_battery_get_property(struct power_supply *psy, |
205 | enum power_supply_property psp, | |
206 | union power_supply_propval *val) | |
207 | { | |
a1b4bd69 | 208 | int ret = 0; |
d7380965 AS |
209 | struct acpi_battery *battery = to_acpi_battery(psy); |
210 | ||
9104476e AS |
211 | if (acpi_battery_present(battery)) { |
212 | /* run battery update only if it is present */ | |
213 | acpi_battery_get_state(battery); | |
214 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
215 | return -ENODEV; |
216 | switch (psp) { | |
217 | case POWER_SUPPLY_PROP_STATUS: | |
bed42280 KHF |
218 | if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) { |
219 | if (battery_full_discharging && battery->rate_now == 0) | |
220 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
221 | else | |
222 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
223 | } else if (battery->state & ACPI_BATTERY_STATE_CHARGING) | |
d7380965 | 224 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
56f382a0 | 225 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 226 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
227 | else |
228 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
229 | break; |
230 | case POWER_SUPPLY_PROP_PRESENT: | |
231 | val->intval = acpi_battery_present(battery); | |
232 | break; | |
233 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
234 | val->intval = acpi_battery_technology(battery); | |
235 | break; | |
c67fcd67 AS |
236 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
237 | val->intval = battery->cycle_count; | |
238 | break; | |
d7380965 | 239 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
240 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
241 | ret = -ENODEV; | |
242 | else | |
243 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
244 | break; |
245 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
246 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
247 | ret = -ENODEV; | |
248 | else | |
249 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
250 | break; |
251 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 252 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
253 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
254 | ret = -ENODEV; | |
255 | else | |
256 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
257 | break; |
258 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
259 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
260 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
261 | ret = -ENODEV; | |
262 | else | |
263 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
264 | break; |
265 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
266 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
267 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
268 | ret = -ENODEV; | |
269 | else | |
270 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
271 | break; |
272 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
273 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
274 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
275 | ret = -ENODEV; | |
276 | else | |
277 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 278 | break; |
a58e1150 | 279 | case POWER_SUPPLY_PROP_CAPACITY: |
280 | if (battery->capacity_now && battery->full_charge_capacity) | |
281 | val->intval = battery->capacity_now * 100/ | |
282 | battery->full_charge_capacity; | |
283 | else | |
284 | val->intval = 0; | |
285 | break; | |
1ac5aaa6 ZR |
286 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
287 | if (battery->state & ACPI_BATTERY_STATE_CRITICAL) | |
288 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
289 | else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
290 | (battery->capacity_now <= battery->alarm)) | |
291 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
292 | else if (acpi_battery_is_charged(battery)) | |
293 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
294 | else | |
295 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
296 | break; | |
d7380965 AS |
297 | case POWER_SUPPLY_PROP_MODEL_NAME: |
298 | val->strval = battery->model_number; | |
299 | break; | |
300 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
301 | val->strval = battery->oem_info; | |
302 | break; | |
7c2670bb | 303 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
304 | val->strval = battery->serial_number; | |
305 | break; | |
d7380965 | 306 | default: |
a1b4bd69 | 307 | ret = -EINVAL; |
d7380965 | 308 | } |
a1b4bd69 | 309 | return ret; |
d7380965 AS |
310 | } |
311 | ||
312 | static enum power_supply_property charge_battery_props[] = { | |
313 | POWER_SUPPLY_PROP_STATUS, | |
314 | POWER_SUPPLY_PROP_PRESENT, | |
315 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 316 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
317 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
318 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
319 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
320 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
321 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
322 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 323 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 324 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
325 | POWER_SUPPLY_PROP_MODEL_NAME, |
326 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 327 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
328 | }; |
329 | ||
330 | static enum power_supply_property energy_battery_props[] = { | |
331 | POWER_SUPPLY_PROP_STATUS, | |
332 | POWER_SUPPLY_PROP_PRESENT, | |
333 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 334 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
335 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
336 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 337 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
338 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
339 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
340 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 341 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 342 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
343 | POWER_SUPPLY_PROP_MODEL_NAME, |
344 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 345 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
346 | }; |
347 | ||
78490d82 AS |
348 | /* -------------------------------------------------------------------------- |
349 | Battery Management | |
350 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
351 | struct acpi_offsets { |
352 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
353 | u8 mode; /* int or string? */ | |
354 | }; | |
b6ce4083 | 355 | |
a4658784 | 356 | static const struct acpi_offsets state_offsets[] = { |
038fdea2 | 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 | |
a4658784 | 363 | static const struct acpi_offsets info_offsets[] = { |
038fdea2 AS |
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 | |
a4658784 | 379 | static const 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 |
402 | static int extract_package(struct acpi_battery *battery, |
403 | union acpi_object *package, | |
a4658784 | 404 | const struct acpi_offsets *offsets, int num) |
038fdea2 | 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 | ||
434 | static 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 | ||
2d09af4a DL |
443 | |
444 | static int extract_battery_info(const int use_bix, | |
445 | struct acpi_battery *battery, | |
446 | const struct acpi_buffer *buffer) | |
1da177e4 | 447 | { |
aa650bbd | 448 | int result = -EFAULT; |
1da177e4 | 449 | |
2d09af4a DL |
450 | if (use_bix && battery_bix_broken_package) |
451 | result = extract_package(battery, buffer->pointer, | |
a90b4038 LT |
452 | extended_info_offsets + 1, |
453 | ARRAY_SIZE(extended_info_offsets) - 1); | |
2d09af4a DL |
454 | else if (use_bix) |
455 | result = extract_package(battery, buffer->pointer, | |
c67fcd67 AS |
456 | extended_info_offsets, |
457 | ARRAY_SIZE(extended_info_offsets)); | |
458 | else | |
2d09af4a | 459 | result = extract_package(battery, buffer->pointer, |
c67fcd67 | 460 | info_offsets, ARRAY_SIZE(info_offsets)); |
557d5868 ZR |
461 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
462 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
463 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
464 | battery->power_unit && battery->design_voltage) { | |
465 | battery->design_capacity = battery->design_capacity * | |
466 | 10000 / battery->design_voltage; | |
467 | battery->full_charge_capacity = battery->full_charge_capacity * | |
468 | 10000 / battery->design_voltage; | |
469 | battery->design_capacity_warning = | |
470 | battery->design_capacity_warning * | |
471 | 10000 / battery->design_voltage; | |
472 | /* Curiously, design_capacity_low, unlike the rest of them, | |
473 | is correct. */ | |
474 | /* capacity_granularity_* equal 1 on the systems tested, so | |
475 | it's impossible to tell if they would need an adjustment | |
476 | or not if their values were higher. */ | |
477 | } | |
d550d98d | 478 | return result; |
1da177e4 LT |
479 | } |
480 | ||
2d09af4a DL |
481 | static int acpi_battery_get_info(struct acpi_battery *battery) |
482 | { | |
483 | const int xinfo = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); | |
484 | int use_bix; | |
485 | int result = -ENODEV; | |
486 | ||
487 | if (!acpi_battery_present(battery)) | |
488 | return 0; | |
489 | ||
490 | ||
491 | for (use_bix = xinfo ? 1 : 0; use_bix >= 0; use_bix--) { | |
492 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
493 | acpi_status status = AE_ERROR; | |
494 | ||
495 | mutex_lock(&battery->lock); | |
496 | status = acpi_evaluate_object(battery->device->handle, | |
497 | use_bix ? "_BIX":"_BIF", | |
498 | NULL, &buffer); | |
499 | mutex_unlock(&battery->lock); | |
500 | ||
501 | if (ACPI_FAILURE(status)) { | |
502 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", | |
503 | use_bix ? "_BIX":"_BIF")); | |
504 | } else { | |
505 | result = extract_battery_info(use_bix, | |
506 | battery, | |
507 | &buffer); | |
508 | ||
509 | kfree(buffer.pointer); | |
510 | break; | |
511 | } | |
512 | } | |
513 | ||
514 | if (!result && !use_bix && xinfo) | |
515 | pr_warn(FW_BUG "The _BIX method is broken, using _BIF.\n"); | |
516 | ||
517 | return result; | |
518 | } | |
519 | ||
b6ce4083 | 520 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 521 | { |
4be44fcd LB |
522 | int result = 0; |
523 | acpi_status status = 0; | |
524 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 525 | |
b6ce4083 VL |
526 | if (!acpi_battery_present(battery)) |
527 | return 0; | |
1da177e4 | 528 | |
f1d4661a AS |
529 | if (battery->update_time && |
530 | time_before(jiffies, battery->update_time + | |
531 | msecs_to_jiffies(cache_time))) | |
532 | return 0; | |
533 | ||
038fdea2 | 534 | mutex_lock(&battery->lock); |
f1d4661a | 535 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
536 | NULL, &buffer); |
537 | mutex_unlock(&battery->lock); | |
5b31d895 | 538 | |
1da177e4 | 539 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 540 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 541 | return -ENODEV; |
1da177e4 | 542 | } |
aa650bbd | 543 | |
038fdea2 AS |
544 | result = extract_package(battery, buffer.pointer, |
545 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 546 | battery->update_time = jiffies; |
78490d82 | 547 | kfree(buffer.pointer); |
bc76f90b | 548 | |
55003b21 LT |
549 | /* For buggy DSDTs that report negative 16-bit values for either |
550 | * charging or discharging current and/or report 0 as 65536 | |
551 | * due to bad math. | |
552 | */ | |
553 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
554 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
555 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 556 | battery->rate_now = abs((s16)battery->rate_now); |
9237516c MK |
557 | printk_once(KERN_WARNING FW_BUG |
558 | "battery: (dis)charge rate invalid.\n"); | |
55003b21 | 559 | } |
bc76f90b | 560 | |
557d5868 ZR |
561 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
562 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
563 | battery->capacity_now = (battery->capacity_now * | |
564 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
565 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
566 | battery->power_unit && battery->design_voltage) { | |
567 | battery->capacity_now = battery->capacity_now * | |
568 | 10000 / battery->design_voltage; | |
569 | } | |
b6ce4083 VL |
570 | return result; |
571 | } | |
1da177e4 | 572 | |
aa650bbd | 573 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 574 | { |
4be44fcd | 575 | acpi_status status = 0; |
1da177e4 | 576 | |
c67fcd67 | 577 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 578 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 579 | return -ENODEV; |
1da177e4 | 580 | |
038fdea2 | 581 | mutex_lock(&battery->lock); |
0db98202 JL |
582 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
583 | battery->alarm); | |
038fdea2 | 584 | mutex_unlock(&battery->lock); |
aa650bbd | 585 | |
1da177e4 | 586 | if (ACPI_FAILURE(status)) |
d550d98d | 587 | return -ENODEV; |
1da177e4 | 588 | |
aa650bbd | 589 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 590 | return 0; |
1da177e4 LT |
591 | } |
592 | ||
b6ce4083 | 593 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 594 | { |
b6ce4083 | 595 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 596 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 597 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 598 | return 0; |
b6ce4083 | 599 | } |
7b3bcc4a | 600 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
601 | if (!battery->alarm) |
602 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 603 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 604 | } |
1da177e4 | 605 | |
508df92d AB |
606 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
607 | struct device_attribute *attr, | |
608 | char *buf) | |
609 | { | |
610 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
611 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
612 | } | |
613 | ||
614 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
615 | struct device_attribute *attr, | |
616 | const char *buf, size_t count) | |
617 | { | |
618 | unsigned long x; | |
619 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 620 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
621 | battery->alarm = x/1000; |
622 | if (acpi_battery_present(battery)) | |
623 | acpi_battery_set_alarm(battery); | |
624 | return count; | |
625 | } | |
626 | ||
627 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 628 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
629 | .show = acpi_battery_alarm_show, |
630 | .store = acpi_battery_alarm_store, | |
631 | }; | |
632 | ||
633 | static int sysfs_add_battery(struct acpi_battery *battery) | |
634 | { | |
297d716f | 635 | struct power_supply_config psy_cfg = { .drv_data = battery, }; |
508df92d | 636 | |
ae6f6187 | 637 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
297d716f KK |
638 | battery->bat_desc.properties = charge_battery_props; |
639 | battery->bat_desc.num_properties = | |
508df92d AB |
640 | ARRAY_SIZE(charge_battery_props); |
641 | } else { | |
297d716f KK |
642 | battery->bat_desc.properties = energy_battery_props; |
643 | battery->bat_desc.num_properties = | |
508df92d AB |
644 | ARRAY_SIZE(energy_battery_props); |
645 | } | |
646 | ||
297d716f KK |
647 | battery->bat_desc.name = acpi_device_bid(battery->device); |
648 | battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; | |
649 | battery->bat_desc.get_property = acpi_battery_get_property; | |
508df92d | 650 | |
297d716f KK |
651 | battery->bat = power_supply_register_no_ws(&battery->device->dev, |
652 | &battery->bat_desc, &psy_cfg); | |
e0d1f09e | 653 | |
297d716f KK |
654 | if (IS_ERR(battery->bat)) { |
655 | int result = PTR_ERR(battery->bat); | |
656 | ||
657 | battery->bat = NULL; | |
508df92d | 658 | return result; |
297d716f KK |
659 | } |
660 | return device_create_file(&battery->bat->dev, &alarm_attr); | |
508df92d AB |
661 | } |
662 | ||
663 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
664 | { | |
69d94ec6 | 665 | mutex_lock(&battery->sysfs_lock); |
297d716f | 666 | if (!battery->bat) { |
69d94ec6 | 667 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 668 | return; |
9c921c22 LT |
669 | } |
670 | ||
297d716f KK |
671 | device_remove_file(&battery->bat->dev, &alarm_attr); |
672 | power_supply_unregister(battery->bat); | |
673 | battery->bat = NULL; | |
69d94ec6 | 674 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
675 | } |
676 | ||
4000e626 KI |
677 | static void find_battery(const struct dmi_header *dm, void *private) |
678 | { | |
679 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
680 | /* Note: the hardcoded offsets below have been extracted from | |
681 | the source code of dmidecode. */ | |
682 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
683 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
684 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
685 | if (dm->length >= 18) | |
686 | dmi_capacity *= dmi_data[17]; | |
687 | if (battery->design_capacity * battery->design_voltage / 1000 | |
688 | != dmi_capacity && | |
689 | battery->design_capacity * 10 == dmi_capacity) | |
690 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
691 | &battery->flags); | |
692 | } | |
693 | } | |
694 | ||
557d5868 ZR |
695 | /* |
696 | * According to the ACPI spec, some kinds of primary batteries can | |
697 | * report percentage battery remaining capacity directly to OS. | |
698 | * In this case, it reports the Last Full Charged Capacity == 100 | |
699 | * and BatteryPresentRate == 0xFFFFFFFF. | |
700 | * | |
701 | * Now we found some battery reports percentage remaining capacity | |
702 | * even if it's rechargeable. | |
703 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
704 | * | |
705 | * Handle this correctly so that they won't break userspace. | |
706 | */ | |
7b78622d | 707 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
708 | { |
709 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 710 | return; |
557d5868 | 711 | |
0f4c6547 NM |
712 | if (battery->full_charge_capacity == 100 && |
713 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
714 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
715 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
716 | battery->full_charge_capacity = battery->design_capacity; | |
717 | battery->capacity_now = (battery->capacity_now * | |
718 | battery->full_charge_capacity) / 100; | |
719 | } | |
4000e626 KI |
720 | |
721 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 722 | return; |
4000e626 KI |
723 | |
724 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
725 | const char *s; | |
726 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
ffd8a731 | 727 | if (s && !strncasecmp(s, "ThinkPad", 8)) { |
4000e626 KI |
728 | dmi_walk(find_battery, battery); |
729 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
730 | &battery->flags) && | |
731 | battery->design_voltage) { | |
732 | battery->design_capacity = | |
733 | battery->design_capacity * | |
734 | 10000 / battery->design_voltage; | |
735 | battery->full_charge_capacity = | |
736 | battery->full_charge_capacity * | |
737 | 10000 / battery->design_voltage; | |
738 | battery->design_capacity_warning = | |
739 | battery->design_capacity_warning * | |
740 | 10000 / battery->design_voltage; | |
741 | battery->capacity_now = battery->capacity_now * | |
742 | 10000 / battery->design_voltage; | |
743 | } | |
744 | } | |
745 | } | |
557d5868 ZR |
746 | } |
747 | ||
9e50bc14 | 748 | static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
b6ce4083 | 749 | { |
50b17851 | 750 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 751 | result = acpi_battery_get_status(battery); |
508df92d | 752 | if (result) |
b6ce4083 | 753 | return result; |
508df92d AB |
754 | if (!acpi_battery_present(battery)) { |
755 | sysfs_remove_battery(battery); | |
97749cd9 | 756 | battery->update_time = 0; |
508df92d | 757 | return 0; |
b6ce4083 | 758 | } |
9e50bc14 LT |
759 | |
760 | if (resume) | |
761 | return 0; | |
762 | ||
50b17851 AS |
763 | if (!battery->update_time || |
764 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
765 | result = acpi_battery_get_info(battery); |
766 | if (result) | |
767 | return result; | |
768 | acpi_battery_init_alarm(battery); | |
769 | } | |
12c78ca2 CG |
770 | |
771 | result = acpi_battery_get_state(battery); | |
772 | if (result) | |
773 | return result; | |
774 | acpi_battery_quirks(battery); | |
775 | ||
297d716f | 776 | if (!battery->bat) { |
eb03cb02 SH |
777 | result = sysfs_add_battery(battery); |
778 | if (result) | |
779 | return result; | |
780 | } | |
e0d1f09e ZR |
781 | |
782 | /* | |
783 | * Wakeup the system if battery is critical low | |
784 | * or lower than the alarm level | |
785 | */ | |
786 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
787 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
788 | (battery->capacity_now <= battery->alarm))) | |
33e4f80e | 789 | acpi_pm_wakeup_event(&battery->device->dev); |
e0d1f09e | 790 | |
557d5868 | 791 | return result; |
4bd35cdb VL |
792 | } |
793 | ||
da8aeb92 RW |
794 | static void acpi_battery_refresh(struct acpi_battery *battery) |
795 | { | |
c5971456 AW |
796 | int power_unit; |
797 | ||
297d716f | 798 | if (!battery->bat) |
da8aeb92 RW |
799 | return; |
800 | ||
c5971456 AW |
801 | power_unit = battery->power_unit; |
802 | ||
da8aeb92 | 803 | acpi_battery_get_info(battery); |
c5971456 AW |
804 | |
805 | if (power_unit == battery->power_unit) | |
806 | return; | |
807 | ||
808 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
809 | sysfs_remove_battery(battery); |
810 | sysfs_add_battery(battery); | |
811 | } | |
812 | ||
3a670cc7 LT |
813 | /* -------------------------------------------------------------------------- |
814 | FS Interface (/proc) | |
815 | -------------------------------------------------------------------------- */ | |
816 | ||
817 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
818 | static struct proc_dir_entry *acpi_battery_dir; | |
819 | ||
27059b91 MK |
820 | static const char *acpi_battery_units(const struct acpi_battery *battery) |
821 | { | |
822 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? | |
823 | "mA" : "mW"; | |
824 | } | |
825 | ||
3a670cc7 LT |
826 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
827 | { | |
828 | struct acpi_battery *battery = seq->private; | |
829 | ||
830 | if (result) | |
831 | goto end; | |
832 | ||
833 | seq_printf(seq, "present: %s\n", | |
834 | acpi_battery_present(battery) ? "yes" : "no"); | |
835 | if (!acpi_battery_present(battery)) | |
836 | goto end; | |
837 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
838 | seq_printf(seq, "design capacity: unknown\n"); | |
839 | else | |
840 | seq_printf(seq, "design capacity: %d %sh\n", | |
841 | battery->design_capacity, | |
842 | acpi_battery_units(battery)); | |
843 | ||
844 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
845 | seq_printf(seq, "last full capacity: unknown\n"); | |
846 | else | |
847 | seq_printf(seq, "last full capacity: %d %sh\n", | |
848 | battery->full_charge_capacity, | |
849 | acpi_battery_units(battery)); | |
850 | ||
851 | seq_printf(seq, "battery technology: %srechargeable\n", | |
852 | (!battery->technology)?"non-":""); | |
853 | ||
854 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
855 | seq_printf(seq, "design voltage: unknown\n"); | |
856 | else | |
857 | seq_printf(seq, "design voltage: %d mV\n", | |
858 | battery->design_voltage); | |
859 | seq_printf(seq, "design capacity warning: %d %sh\n", | |
860 | battery->design_capacity_warning, | |
861 | acpi_battery_units(battery)); | |
862 | seq_printf(seq, "design capacity low: %d %sh\n", | |
863 | battery->design_capacity_low, | |
864 | acpi_battery_units(battery)); | |
865 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); | |
866 | seq_printf(seq, "capacity granularity 1: %d %sh\n", | |
867 | battery->capacity_granularity_1, | |
868 | acpi_battery_units(battery)); | |
869 | seq_printf(seq, "capacity granularity 2: %d %sh\n", | |
870 | battery->capacity_granularity_2, | |
871 | acpi_battery_units(battery)); | |
872 | seq_printf(seq, "model number: %s\n", battery->model_number); | |
873 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
874 | seq_printf(seq, "battery type: %s\n", battery->type); | |
875 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
876 | end: | |
877 | if (result) | |
878 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
879 | return result; | |
880 | } | |
881 | ||
882 | static int acpi_battery_print_state(struct seq_file *seq, int result) | |
883 | { | |
884 | struct acpi_battery *battery = seq->private; | |
885 | ||
886 | if (result) | |
887 | goto end; | |
888 | ||
889 | seq_printf(seq, "present: %s\n", | |
890 | acpi_battery_present(battery) ? "yes" : "no"); | |
891 | if (!acpi_battery_present(battery)) | |
892 | goto end; | |
893 | ||
894 | seq_printf(seq, "capacity state: %s\n", | |
895 | (battery->state & 0x04) ? "critical" : "ok"); | |
896 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
897 | seq_printf(seq, | |
898 | "charging state: charging/discharging\n"); | |
899 | else if (battery->state & 0x01) | |
900 | seq_printf(seq, "charging state: discharging\n"); | |
901 | else if (battery->state & 0x02) | |
902 | seq_printf(seq, "charging state: charging\n"); | |
903 | else | |
904 | seq_printf(seq, "charging state: charged\n"); | |
905 | ||
906 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
907 | seq_printf(seq, "present rate: unknown\n"); | |
908 | else | |
909 | seq_printf(seq, "present rate: %d %s\n", | |
910 | battery->rate_now, acpi_battery_units(battery)); | |
911 | ||
912 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
913 | seq_printf(seq, "remaining capacity: unknown\n"); | |
914 | else | |
915 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
916 | battery->capacity_now, acpi_battery_units(battery)); | |
917 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
918 | seq_printf(seq, "present voltage: unknown\n"); | |
919 | else | |
920 | seq_printf(seq, "present voltage: %d mV\n", | |
921 | battery->voltage_now); | |
922 | end: | |
923 | if (result) | |
924 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
925 | ||
926 | return result; | |
927 | } | |
928 | ||
929 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) | |
930 | { | |
931 | struct acpi_battery *battery = seq->private; | |
932 | ||
933 | if (result) | |
934 | goto end; | |
935 | ||
936 | if (!acpi_battery_present(battery)) { | |
937 | seq_printf(seq, "present: no\n"); | |
938 | goto end; | |
939 | } | |
940 | seq_printf(seq, "alarm: "); | |
941 | if (!battery->alarm) | |
942 | seq_printf(seq, "unsupported\n"); | |
943 | else | |
944 | seq_printf(seq, "%u %sh\n", battery->alarm, | |
945 | acpi_battery_units(battery)); | |
946 | end: | |
947 | if (result) | |
948 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
949 | return result; | |
950 | } | |
951 | ||
952 | static ssize_t acpi_battery_write_alarm(struct file *file, | |
953 | const char __user * buffer, | |
954 | size_t count, loff_t * ppos) | |
955 | { | |
956 | int result = 0; | |
957 | char alarm_string[12] = { '\0' }; | |
958 | struct seq_file *m = file->private_data; | |
959 | struct acpi_battery *battery = m->private; | |
960 | ||
961 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
962 | return -EINVAL; | |
963 | if (!acpi_battery_present(battery)) { | |
964 | result = -ENODEV; | |
965 | goto end; | |
966 | } | |
967 | if (copy_from_user(alarm_string, buffer, count)) { | |
968 | result = -EFAULT; | |
969 | goto end; | |
970 | } | |
971 | alarm_string[count] = '\0'; | |
3d915894 CJ |
972 | if (kstrtoint(alarm_string, 0, &battery->alarm)) { |
973 | result = -EINVAL; | |
974 | goto end; | |
975 | } | |
3a670cc7 LT |
976 | result = acpi_battery_set_alarm(battery); |
977 | end: | |
978 | if (!result) | |
979 | return count; | |
980 | return result; | |
981 | } | |
982 | ||
983 | typedef int(*print_func)(struct seq_file *seq, int result); | |
984 | ||
985 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
986 | acpi_battery_print_info, | |
987 | acpi_battery_print_state, | |
988 | acpi_battery_print_alarm, | |
989 | }; | |
990 | ||
991 | static int acpi_battery_read(int fid, struct seq_file *seq) | |
992 | { | |
993 | struct acpi_battery *battery = seq->private; | |
9e50bc14 | 994 | int result = acpi_battery_update(battery, false); |
3a670cc7 LT |
995 | return acpi_print_funcs[fid](seq, result); |
996 | } | |
997 | ||
998 | #define DECLARE_FILE_FUNCTIONS(_name) \ | |
999 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
1000 | { \ | |
1001 | return acpi_battery_read(_name##_tag, seq); \ | |
1002 | } \ | |
1003 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
1004 | { \ | |
1005 | return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \ | |
1006 | } | |
1007 | ||
1008 | DECLARE_FILE_FUNCTIONS(info); | |
1009 | DECLARE_FILE_FUNCTIONS(state); | |
1010 | DECLARE_FILE_FUNCTIONS(alarm); | |
1011 | ||
1012 | #undef DECLARE_FILE_FUNCTIONS | |
1013 | ||
1014 | #define FILE_DESCRIPTION_RO(_name) \ | |
1015 | { \ | |
1016 | .name = __stringify(_name), \ | |
1017 | .mode = S_IRUGO, \ | |
1018 | .ops = { \ | |
1019 | .open = acpi_battery_##_name##_open_fs, \ | |
1020 | .read = seq_read, \ | |
1021 | .llseek = seq_lseek, \ | |
1022 | .release = single_release, \ | |
1023 | .owner = THIS_MODULE, \ | |
1024 | }, \ | |
1025 | } | |
1026 | ||
1027 | #define FILE_DESCRIPTION_RW(_name) \ | |
1028 | { \ | |
1029 | .name = __stringify(_name), \ | |
1030 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
1031 | .ops = { \ | |
1032 | .open = acpi_battery_##_name##_open_fs, \ | |
1033 | .read = seq_read, \ | |
1034 | .llseek = seq_lseek, \ | |
1035 | .write = acpi_battery_write_##_name, \ | |
1036 | .release = single_release, \ | |
1037 | .owner = THIS_MODULE, \ | |
1038 | }, \ | |
1039 | } | |
1040 | ||
1041 | static const struct battery_file { | |
1042 | struct file_operations ops; | |
1043 | umode_t mode; | |
1044 | const char *name; | |
1045 | } acpi_battery_file[] = { | |
1046 | FILE_DESCRIPTION_RO(info), | |
1047 | FILE_DESCRIPTION_RO(state), | |
1048 | FILE_DESCRIPTION_RW(alarm), | |
1049 | }; | |
1050 | ||
1051 | #undef FILE_DESCRIPTION_RO | |
1052 | #undef FILE_DESCRIPTION_RW | |
1053 | ||
1054 | static int acpi_battery_add_fs(struct acpi_device *device) | |
1055 | { | |
1056 | struct proc_dir_entry *entry = NULL; | |
1057 | int i; | |
1058 | ||
1059 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," | |
1060 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1061 | if (!acpi_device_dir(device)) { | |
1062 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
1063 | acpi_battery_dir); | |
1064 | if (!acpi_device_dir(device)) | |
1065 | return -ENODEV; | |
1066 | } | |
1067 | ||
1068 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { | |
1069 | entry = proc_create_data(acpi_battery_file[i].name, | |
1070 | acpi_battery_file[i].mode, | |
1071 | acpi_device_dir(device), | |
1072 | &acpi_battery_file[i].ops, | |
1073 | acpi_driver_data(device)); | |
1074 | if (!entry) | |
1075 | return -ENODEV; | |
1076 | } | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | static void acpi_battery_remove_fs(struct acpi_device *device) | |
1081 | { | |
1082 | int i; | |
1083 | if (!acpi_device_dir(device)) | |
1084 | return; | |
1085 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
1086 | remove_proc_entry(acpi_battery_file[i].name, | |
1087 | acpi_device_dir(device)); | |
1088 | ||
1089 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
1090 | acpi_device_dir(device) = NULL; | |
1091 | } | |
1092 | ||
1093 | #endif | |
1094 | ||
1da177e4 LT |
1095 | /* -------------------------------------------------------------------------- |
1096 | Driver Interface | |
1097 | -------------------------------------------------------------------------- */ | |
1098 | ||
d9406691 | 1099 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1100 | { |
d9406691 | 1101 | struct acpi_battery *battery = acpi_driver_data(device); |
297d716f | 1102 | struct power_supply *old; |
d9406691 | 1103 | |
1da177e4 | 1104 | if (!battery) |
d550d98d | 1105 | return; |
297d716f | 1106 | old = battery->bat; |
f43691c6 AM |
1107 | /* |
1108 | * On Acer Aspire V5-573G notifications are sometimes triggered too | |
1109 | * early. For example, when AC is unplugged and notification is | |
1110 | * triggered, battery state is still reported as "Full", and changes to | |
1111 | * "Discharging" only after short delay, without any notification. | |
1112 | */ | |
1113 | if (battery_notification_delay_ms > 0) | |
1114 | msleep(battery_notification_delay_ms); | |
da8aeb92 RW |
1115 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1116 | acpi_battery_refresh(battery); | |
9e50bc14 | 1117 | acpi_battery_update(battery, false); |
f1d4661a | 1118 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1119 | dev_name(&device->dev), event, |
9ea7d575 | 1120 | acpi_battery_present(battery)); |
411e0f77 | 1121 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1122 | /* acpi_battery_update could remove power_supply object */ |
297d716f KK |
1123 | if (old && battery->bat) |
1124 | power_supply_changed(battery->bat); | |
1da177e4 LT |
1125 | } |
1126 | ||
25be5821 KM |
1127 | static int battery_notify(struct notifier_block *nb, |
1128 | unsigned long mode, void *_unused) | |
1129 | { | |
1130 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1131 | pm_nb); | |
9e50bc14 LT |
1132 | int result; |
1133 | ||
25be5821 | 1134 | switch (mode) { |
d5a5911b | 1135 | case PM_POST_HIBERNATION: |
25be5821 | 1136 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1137 | if (!acpi_battery_present(battery)) |
1138 | return 0; | |
1139 | ||
31f7dc79 | 1140 | if (!battery->bat) { |
9e50bc14 LT |
1141 | result = acpi_battery_get_info(battery); |
1142 | if (result) | |
1143 | return result; | |
1144 | ||
1145 | result = sysfs_add_battery(battery); | |
1146 | if (result) | |
1147 | return result; | |
1148 | } else | |
1149 | acpi_battery_refresh(battery); | |
1150 | ||
1151 | acpi_battery_init_alarm(battery); | |
1152 | acpi_battery_get_state(battery); | |
25be5821 KM |
1153 | break; |
1154 | } | |
1155 | ||
1156 | return 0; | |
1157 | } | |
1158 | ||
048d16da MK |
1159 | static int __init |
1160 | battery_bix_broken_package_quirk(const struct dmi_system_id *d) | |
3f5dc08f AM |
1161 | { |
1162 | battery_bix_broken_package = 1; | |
1163 | return 0; | |
1164 | } | |
1165 | ||
048d16da MK |
1166 | static int __init |
1167 | battery_notification_delay_quirk(const struct dmi_system_id *d) | |
f43691c6 AM |
1168 | { |
1169 | battery_notification_delay_ms = 1000; | |
1170 | return 0; | |
1171 | } | |
1172 | ||
bed42280 KHF |
1173 | static int __init battery_full_discharging_quirk(const struct dmi_system_id *d) |
1174 | { | |
1175 | battery_full_discharging = 1; | |
1176 | return 0; | |
1177 | } | |
1178 | ||
048d16da | 1179 | static const struct dmi_system_id bat_dmi_table[] __initconst = { |
a90b4038 | 1180 | { |
3f5dc08f | 1181 | .callback = battery_bix_broken_package_quirk, |
a90b4038 LT |
1182 | .ident = "NEC LZ750/LS", |
1183 | .matches = { | |
1184 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1185 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1186 | }, | |
1187 | }, | |
f43691c6 AM |
1188 | { |
1189 | .callback = battery_notification_delay_quirk, | |
1190 | .ident = "Acer Aspire V5-573G", | |
1191 | .matches = { | |
1192 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1193 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), | |
1194 | }, | |
1195 | }, | |
bed42280 KHF |
1196 | { |
1197 | .callback = battery_full_discharging_quirk, | |
1198 | .ident = "ASUS GL502VSK", | |
1199 | .matches = { | |
1200 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
1201 | DMI_MATCH(DMI_PRODUCT_NAME, "GL502VSK"), | |
1202 | }, | |
1203 | }, | |
1204 | { | |
1205 | .callback = battery_full_discharging_quirk, | |
1206 | .ident = "ASUS UX305LA", | |
1207 | .matches = { | |
1208 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
1209 | DMI_MATCH(DMI_PRODUCT_NAME, "UX305LA"), | |
1210 | }, | |
1211 | }, | |
27cc038b KHF |
1212 | { |
1213 | .callback = battery_full_discharging_quirk, | |
1214 | .ident = "ASUS UX360UA", | |
1215 | .matches = { | |
1216 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
1217 | DMI_MATCH(DMI_PRODUCT_NAME, "UX360UA"), | |
1218 | }, | |
1219 | }, | |
1220 | { | |
1221 | .callback = battery_full_discharging_quirk, | |
1222 | .ident = "ASUS UX410UAK", | |
1223 | .matches = { | |
1224 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
1225 | DMI_MATCH(DMI_PRODUCT_NAME, "UX410UAK"), | |
1226 | }, | |
1227 | }, | |
a90b4038 LT |
1228 | {}, |
1229 | }; | |
1230 | ||
75646e75 LT |
1231 | /* |
1232 | * Some machines'(E,G Lenovo Z480) ECs are not stable | |
1233 | * during boot up and this causes battery driver fails to be | |
1234 | * probed due to failure of getting battery information | |
1235 | * from EC sometimes. After several retries, the operation | |
1236 | * may work. So add retry code here and 20ms sleep between | |
1237 | * every retries. | |
1238 | */ | |
1239 | static int acpi_battery_update_retry(struct acpi_battery *battery) | |
1240 | { | |
1241 | int retry, ret; | |
1242 | ||
1243 | for (retry = 5; retry; retry--) { | |
1244 | ret = acpi_battery_update(battery, false); | |
1245 | if (!ret) | |
1246 | break; | |
1247 | ||
1248 | msleep(20); | |
1249 | } | |
1250 | return ret; | |
1251 | } | |
1252 | ||
4be44fcd | 1253 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1254 | { |
4be44fcd | 1255 | int result = 0; |
4be44fcd | 1256 | struct acpi_battery *battery = NULL; |
952c63e9 | 1257 | |
1da177e4 | 1258 | if (!device) |
d550d98d | 1259 | return -EINVAL; |
40e7fcb1 LT |
1260 | |
1261 | if (device->dep_unmet) | |
1262 | return -EPROBE_DEFER; | |
1263 | ||
36bcbec7 | 1264 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1265 | if (!battery) |
d550d98d | 1266 | return -ENOMEM; |
145def84 | 1267 | battery->device = device; |
1da177e4 LT |
1268 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1269 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1270 | device->driver_data = battery; |
038fdea2 | 1271 | mutex_init(&battery->lock); |
69d94ec6 | 1272 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1273 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1274 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
75646e75 LT |
1275 | |
1276 | result = acpi_battery_update_retry(battery); | |
eb03cb02 SH |
1277 | if (result) |
1278 | goto fail; | |
75646e75 | 1279 | |
3a670cc7 LT |
1280 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1281 | result = acpi_battery_add_fs(device); | |
1282 | #endif | |
1283 | if (result) { | |
1284 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1285 | acpi_battery_remove_fs(device); | |
1286 | #endif | |
1287 | goto fail; | |
1288 | } | |
25be5821 | 1289 | |
e80bba4b SH |
1290 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1291 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1292 | device->status.battery_present ? "present" : "absent"); | |
1293 | ||
25be5821 KM |
1294 | battery->pm_nb.notifier_call = battery_notify; |
1295 | register_pm_notifier(&battery->pm_nb); | |
1296 | ||
e0d1f09e ZR |
1297 | device_init_wakeup(&device->dev, 1); |
1298 | ||
d550d98d | 1299 | return result; |
e80bba4b SH |
1300 | |
1301 | fail: | |
1302 | sysfs_remove_battery(battery); | |
1303 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1304 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1305 | kfree(battery); |
1306 | return result; | |
1da177e4 LT |
1307 | } |
1308 | ||
51fac838 | 1309 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1310 | { |
4be44fcd | 1311 | struct acpi_battery *battery = NULL; |
1da177e4 | 1312 | |
1da177e4 | 1313 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1314 | return -EINVAL; |
e0d1f09e | 1315 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1316 | battery = acpi_driver_data(device); |
25be5821 | 1317 | unregister_pm_notifier(&battery->pm_nb); |
3a670cc7 LT |
1318 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1319 | acpi_battery_remove_fs(device); | |
1320 | #endif | |
508df92d | 1321 | sysfs_remove_battery(battery); |
038fdea2 | 1322 | mutex_destroy(&battery->lock); |
69d94ec6 | 1323 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1324 | kfree(battery); |
d550d98d | 1325 | return 0; |
1da177e4 LT |
1326 | } |
1327 | ||
90692404 | 1328 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1329 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1330 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1331 | { |
1332 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1333 | |
1334 | if (!dev) | |
34c4415a | 1335 | return -EINVAL; |
a6f50dc8 RW |
1336 | |
1337 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1338 | if (!battery) | |
1339 | return -EINVAL; | |
1340 | ||
f1d4661a | 1341 | battery->update_time = 0; |
9e50bc14 | 1342 | acpi_battery_update(battery, true); |
b6ce4083 | 1343 | return 0; |
34c4415a | 1344 | } |
7f6895c6 SK |
1345 | #else |
1346 | #define acpi_battery_resume NULL | |
90692404 | 1347 | #endif |
34c4415a | 1348 | |
a6f50dc8 RW |
1349 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1350 | ||
aa650bbd AS |
1351 | static struct acpi_driver acpi_battery_driver = { |
1352 | .name = "battery", | |
1353 | .class = ACPI_BATTERY_CLASS, | |
1354 | .ids = battery_device_ids, | |
d9406691 | 1355 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1356 | .ops = { |
1357 | .add = acpi_battery_add, | |
aa650bbd | 1358 | .remove = acpi_battery_remove, |
d9406691 | 1359 | .notify = acpi_battery_notify, |
aa650bbd | 1360 | }, |
a6f50dc8 | 1361 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1362 | }; |
1363 | ||
b0cbc861 | 1364 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1365 | { |
dccfae6d | 1366 | unsigned int i; |
479faaf0 LH |
1367 | int result; |
1368 | ||
dccfae6d HG |
1369 | for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++) |
1370 | if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) { | |
1371 | pr_info(PREFIX ACPI_BATTERY_DEVICE_NAME | |
1372 | ": found native %s PMIC, not loading\n", | |
1373 | acpi_battery_blacklist[i]); | |
1374 | return; | |
1375 | } | |
1376 | ||
3f5dc08f | 1377 | dmi_check_system(bat_dmi_table); |
479faaf0 | 1378 | |
3a670cc7 LT |
1379 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1380 | acpi_battery_dir = acpi_lock_battery_dir(); | |
1381 | if (!acpi_battery_dir) | |
1382 | return; | |
1383 | #endif | |
479faaf0 | 1384 | result = acpi_bus_register_driver(&acpi_battery_driver); |
3a670cc7 | 1385 | #ifdef CONFIG_ACPI_PROCFS_POWER |
479faaf0 | 1386 | if (result < 0) |
3a670cc7 LT |
1387 | acpi_unlock_battery_dir(acpi_battery_dir); |
1388 | #endif | |
bc39fbcf | 1389 | battery_driver_registered = (result == 0); |
0f66af53 AV |
1390 | } |
1391 | ||
1392 | static int __init acpi_battery_init(void) | |
1393 | { | |
e234b074 LH |
1394 | if (acpi_disabled) |
1395 | return -ENODEV; | |
1396 | ||
eca21d91 | 1397 | async_cookie = async_schedule(acpi_battery_init_async, NULL); |
d550d98d | 1398 | return 0; |
1da177e4 LT |
1399 | } |
1400 | ||
4be44fcd | 1401 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1402 | { |
5dfa0c73 | 1403 | async_synchronize_cookie(async_cookie + 1); |
bc39fbcf HG |
1404 | if (battery_driver_registered) |
1405 | acpi_bus_unregister_driver(&acpi_battery_driver); | |
3a670cc7 | 1406 | #ifdef CONFIG_ACPI_PROCFS_POWER |
bc39fbcf HG |
1407 | if (acpi_battery_dir) |
1408 | acpi_unlock_battery_dir(acpi_battery_dir); | |
3a670cc7 | 1409 | #endif |
1da177e4 LT |
1410 | } |
1411 | ||
1da177e4 LT |
1412 | module_init(acpi_battery_init); |
1413 | module_exit(acpi_battery_exit); |