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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 | 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; |
a90b4038 | 70 | static int battery_bix_broken_package; |
f43691c6 | 71 | static int battery_notification_delay_ms; |
f1d4661a AS |
72 | static unsigned int cache_time = 1000; |
73 | module_param(cache_time, uint, 0644); | |
74 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 75 | |
3a670cc7 LT |
76 | #ifdef CONFIG_ACPI_PROCFS_POWER |
77 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); | |
78 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
79 | ||
80 | enum acpi_battery_files { | |
81 | info_tag = 0, | |
82 | state_tag, | |
83 | alarm_tag, | |
84 | ACPI_BATTERY_NUMFILES, | |
85 | }; | |
86 | ||
87 | #endif | |
88 | ||
1ba90e3a TR |
89 | static const struct acpi_device_id battery_device_ids[] = { |
90 | {"PNP0C0A", 0}, | |
91 | {"", 0}, | |
92 | }; | |
1ba90e3a | 93 | |
aa650bbd | 94 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 95 | |
7b3bcc4a AS |
96 | enum { |
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 | 114 | struct 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 | 152 | static 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 |
157 | static 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 | 172 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 173 | |
56f382a0 RH |
174 | static 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 |
197 | static 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 | ||
302 | static 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 | ||
320 | static 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 |
341 | struct acpi_offsets { |
342 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
343 | u8 mode; /* int or string? */ | |
344 | }; | |
b6ce4083 | 345 | |
a4658784 | 346 | static 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 | 353 | static 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 | 369 | static 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 |
392 | static 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 | ||
424 | static 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 | ||
433 | static 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 | 486 | static 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 | 539 | static 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 | 559 | static 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 |
572 | static 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 | ||
580 | static 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 | ||
593 | static 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 | ||
599 | static 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 | ||
629 | static 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 |
643 | static 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 | 673 | static 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 | 714 | static 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 | } | |
12c78ca2 CG |
736 | |
737 | result = acpi_battery_get_state(battery); | |
738 | if (result) | |
739 | return result; | |
740 | acpi_battery_quirks(battery); | |
741 | ||
297d716f | 742 | if (!battery->bat) { |
eb03cb02 SH |
743 | result = sysfs_add_battery(battery); |
744 | if (result) | |
745 | return result; | |
746 | } | |
e0d1f09e ZR |
747 | |
748 | /* | |
749 | * Wakeup the system if battery is critical low | |
750 | * or lower than the alarm level | |
751 | */ | |
752 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
753 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
754 | (battery->capacity_now <= battery->alarm))) | |
755 | pm_wakeup_event(&battery->device->dev, 0); | |
756 | ||
557d5868 | 757 | return result; |
4bd35cdb VL |
758 | } |
759 | ||
da8aeb92 RW |
760 | static void acpi_battery_refresh(struct acpi_battery *battery) |
761 | { | |
c5971456 AW |
762 | int power_unit; |
763 | ||
297d716f | 764 | if (!battery->bat) |
da8aeb92 RW |
765 | return; |
766 | ||
c5971456 AW |
767 | power_unit = battery->power_unit; |
768 | ||
da8aeb92 | 769 | acpi_battery_get_info(battery); |
c5971456 AW |
770 | |
771 | if (power_unit == battery->power_unit) | |
772 | return; | |
773 | ||
774 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
775 | sysfs_remove_battery(battery); |
776 | sysfs_add_battery(battery); | |
777 | } | |
778 | ||
3a670cc7 LT |
779 | /* -------------------------------------------------------------------------- |
780 | FS Interface (/proc) | |
781 | -------------------------------------------------------------------------- */ | |
782 | ||
783 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
784 | static struct proc_dir_entry *acpi_battery_dir; | |
785 | ||
27059b91 MK |
786 | static const char *acpi_battery_units(const struct acpi_battery *battery) |
787 | { | |
788 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? | |
789 | "mA" : "mW"; | |
790 | } | |
791 | ||
3a670cc7 LT |
792 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
793 | { | |
794 | struct acpi_battery *battery = seq->private; | |
795 | ||
796 | if (result) | |
797 | goto end; | |
798 | ||
799 | seq_printf(seq, "present: %s\n", | |
800 | acpi_battery_present(battery) ? "yes" : "no"); | |
801 | if (!acpi_battery_present(battery)) | |
802 | goto end; | |
803 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
804 | seq_printf(seq, "design capacity: unknown\n"); | |
805 | else | |
806 | seq_printf(seq, "design capacity: %d %sh\n", | |
807 | battery->design_capacity, | |
808 | acpi_battery_units(battery)); | |
809 | ||
810 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
811 | seq_printf(seq, "last full capacity: unknown\n"); | |
812 | else | |
813 | seq_printf(seq, "last full capacity: %d %sh\n", | |
814 | battery->full_charge_capacity, | |
815 | acpi_battery_units(battery)); | |
816 | ||
817 | seq_printf(seq, "battery technology: %srechargeable\n", | |
818 | (!battery->technology)?"non-":""); | |
819 | ||
820 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
821 | seq_printf(seq, "design voltage: unknown\n"); | |
822 | else | |
823 | seq_printf(seq, "design voltage: %d mV\n", | |
824 | battery->design_voltage); | |
825 | seq_printf(seq, "design capacity warning: %d %sh\n", | |
826 | battery->design_capacity_warning, | |
827 | acpi_battery_units(battery)); | |
828 | seq_printf(seq, "design capacity low: %d %sh\n", | |
829 | battery->design_capacity_low, | |
830 | acpi_battery_units(battery)); | |
831 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); | |
832 | seq_printf(seq, "capacity granularity 1: %d %sh\n", | |
833 | battery->capacity_granularity_1, | |
834 | acpi_battery_units(battery)); | |
835 | seq_printf(seq, "capacity granularity 2: %d %sh\n", | |
836 | battery->capacity_granularity_2, | |
837 | acpi_battery_units(battery)); | |
838 | seq_printf(seq, "model number: %s\n", battery->model_number); | |
839 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
840 | seq_printf(seq, "battery type: %s\n", battery->type); | |
841 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
842 | end: | |
843 | if (result) | |
844 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
845 | return result; | |
846 | } | |
847 | ||
848 | static int acpi_battery_print_state(struct seq_file *seq, int result) | |
849 | { | |
850 | struct acpi_battery *battery = seq->private; | |
851 | ||
852 | if (result) | |
853 | goto end; | |
854 | ||
855 | seq_printf(seq, "present: %s\n", | |
856 | acpi_battery_present(battery) ? "yes" : "no"); | |
857 | if (!acpi_battery_present(battery)) | |
858 | goto end; | |
859 | ||
860 | seq_printf(seq, "capacity state: %s\n", | |
861 | (battery->state & 0x04) ? "critical" : "ok"); | |
862 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
863 | seq_printf(seq, | |
864 | "charging state: charging/discharging\n"); | |
865 | else if (battery->state & 0x01) | |
866 | seq_printf(seq, "charging state: discharging\n"); | |
867 | else if (battery->state & 0x02) | |
868 | seq_printf(seq, "charging state: charging\n"); | |
869 | else | |
870 | seq_printf(seq, "charging state: charged\n"); | |
871 | ||
872 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
873 | seq_printf(seq, "present rate: unknown\n"); | |
874 | else | |
875 | seq_printf(seq, "present rate: %d %s\n", | |
876 | battery->rate_now, acpi_battery_units(battery)); | |
877 | ||
878 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
879 | seq_printf(seq, "remaining capacity: unknown\n"); | |
880 | else | |
881 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
882 | battery->capacity_now, acpi_battery_units(battery)); | |
883 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
884 | seq_printf(seq, "present voltage: unknown\n"); | |
885 | else | |
886 | seq_printf(seq, "present voltage: %d mV\n", | |
887 | battery->voltage_now); | |
888 | end: | |
889 | if (result) | |
890 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
891 | ||
892 | return result; | |
893 | } | |
894 | ||
895 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) | |
896 | { | |
897 | struct acpi_battery *battery = seq->private; | |
898 | ||
899 | if (result) | |
900 | goto end; | |
901 | ||
902 | if (!acpi_battery_present(battery)) { | |
903 | seq_printf(seq, "present: no\n"); | |
904 | goto end; | |
905 | } | |
906 | seq_printf(seq, "alarm: "); | |
907 | if (!battery->alarm) | |
908 | seq_printf(seq, "unsupported\n"); | |
909 | else | |
910 | seq_printf(seq, "%u %sh\n", battery->alarm, | |
911 | acpi_battery_units(battery)); | |
912 | end: | |
913 | if (result) | |
914 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
915 | return result; | |
916 | } | |
917 | ||
918 | static ssize_t acpi_battery_write_alarm(struct file *file, | |
919 | const char __user * buffer, | |
920 | size_t count, loff_t * ppos) | |
921 | { | |
922 | int result = 0; | |
923 | char alarm_string[12] = { '\0' }; | |
924 | struct seq_file *m = file->private_data; | |
925 | struct acpi_battery *battery = m->private; | |
926 | ||
927 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
928 | return -EINVAL; | |
929 | if (!acpi_battery_present(battery)) { | |
930 | result = -ENODEV; | |
931 | goto end; | |
932 | } | |
933 | if (copy_from_user(alarm_string, buffer, count)) { | |
934 | result = -EFAULT; | |
935 | goto end; | |
936 | } | |
937 | alarm_string[count] = '\0'; | |
3d915894 CJ |
938 | if (kstrtoint(alarm_string, 0, &battery->alarm)) { |
939 | result = -EINVAL; | |
940 | goto end; | |
941 | } | |
3a670cc7 LT |
942 | result = acpi_battery_set_alarm(battery); |
943 | end: | |
944 | if (!result) | |
945 | return count; | |
946 | return result; | |
947 | } | |
948 | ||
949 | typedef int(*print_func)(struct seq_file *seq, int result); | |
950 | ||
951 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
952 | acpi_battery_print_info, | |
953 | acpi_battery_print_state, | |
954 | acpi_battery_print_alarm, | |
955 | }; | |
956 | ||
957 | static int acpi_battery_read(int fid, struct seq_file *seq) | |
958 | { | |
959 | struct acpi_battery *battery = seq->private; | |
9e50bc14 | 960 | int result = acpi_battery_update(battery, false); |
3a670cc7 LT |
961 | return acpi_print_funcs[fid](seq, result); |
962 | } | |
963 | ||
964 | #define DECLARE_FILE_FUNCTIONS(_name) \ | |
965 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
966 | { \ | |
967 | return acpi_battery_read(_name##_tag, seq); \ | |
968 | } \ | |
969 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
970 | { \ | |
971 | return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \ | |
972 | } | |
973 | ||
974 | DECLARE_FILE_FUNCTIONS(info); | |
975 | DECLARE_FILE_FUNCTIONS(state); | |
976 | DECLARE_FILE_FUNCTIONS(alarm); | |
977 | ||
978 | #undef DECLARE_FILE_FUNCTIONS | |
979 | ||
980 | #define FILE_DESCRIPTION_RO(_name) \ | |
981 | { \ | |
982 | .name = __stringify(_name), \ | |
983 | .mode = S_IRUGO, \ | |
984 | .ops = { \ | |
985 | .open = acpi_battery_##_name##_open_fs, \ | |
986 | .read = seq_read, \ | |
987 | .llseek = seq_lseek, \ | |
988 | .release = single_release, \ | |
989 | .owner = THIS_MODULE, \ | |
990 | }, \ | |
991 | } | |
992 | ||
993 | #define FILE_DESCRIPTION_RW(_name) \ | |
994 | { \ | |
995 | .name = __stringify(_name), \ | |
996 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
997 | .ops = { \ | |
998 | .open = acpi_battery_##_name##_open_fs, \ | |
999 | .read = seq_read, \ | |
1000 | .llseek = seq_lseek, \ | |
1001 | .write = acpi_battery_write_##_name, \ | |
1002 | .release = single_release, \ | |
1003 | .owner = THIS_MODULE, \ | |
1004 | }, \ | |
1005 | } | |
1006 | ||
1007 | static const struct battery_file { | |
1008 | struct file_operations ops; | |
1009 | umode_t mode; | |
1010 | const char *name; | |
1011 | } acpi_battery_file[] = { | |
1012 | FILE_DESCRIPTION_RO(info), | |
1013 | FILE_DESCRIPTION_RO(state), | |
1014 | FILE_DESCRIPTION_RW(alarm), | |
1015 | }; | |
1016 | ||
1017 | #undef FILE_DESCRIPTION_RO | |
1018 | #undef FILE_DESCRIPTION_RW | |
1019 | ||
1020 | static int acpi_battery_add_fs(struct acpi_device *device) | |
1021 | { | |
1022 | struct proc_dir_entry *entry = NULL; | |
1023 | int i; | |
1024 | ||
1025 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," | |
1026 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1027 | if (!acpi_device_dir(device)) { | |
1028 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
1029 | acpi_battery_dir); | |
1030 | if (!acpi_device_dir(device)) | |
1031 | return -ENODEV; | |
1032 | } | |
1033 | ||
1034 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { | |
1035 | entry = proc_create_data(acpi_battery_file[i].name, | |
1036 | acpi_battery_file[i].mode, | |
1037 | acpi_device_dir(device), | |
1038 | &acpi_battery_file[i].ops, | |
1039 | acpi_driver_data(device)); | |
1040 | if (!entry) | |
1041 | return -ENODEV; | |
1042 | } | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | static void acpi_battery_remove_fs(struct acpi_device *device) | |
1047 | { | |
1048 | int i; | |
1049 | if (!acpi_device_dir(device)) | |
1050 | return; | |
1051 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
1052 | remove_proc_entry(acpi_battery_file[i].name, | |
1053 | acpi_device_dir(device)); | |
1054 | ||
1055 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
1056 | acpi_device_dir(device) = NULL; | |
1057 | } | |
1058 | ||
1059 | #endif | |
1060 | ||
1da177e4 LT |
1061 | /* -------------------------------------------------------------------------- |
1062 | Driver Interface | |
1063 | -------------------------------------------------------------------------- */ | |
1064 | ||
d9406691 | 1065 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1066 | { |
d9406691 | 1067 | struct acpi_battery *battery = acpi_driver_data(device); |
297d716f | 1068 | struct power_supply *old; |
d9406691 | 1069 | |
1da177e4 | 1070 | if (!battery) |
d550d98d | 1071 | return; |
297d716f | 1072 | old = battery->bat; |
f43691c6 AM |
1073 | /* |
1074 | * On Acer Aspire V5-573G notifications are sometimes triggered too | |
1075 | * early. For example, when AC is unplugged and notification is | |
1076 | * triggered, battery state is still reported as "Full", and changes to | |
1077 | * "Discharging" only after short delay, without any notification. | |
1078 | */ | |
1079 | if (battery_notification_delay_ms > 0) | |
1080 | msleep(battery_notification_delay_ms); | |
da8aeb92 RW |
1081 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1082 | acpi_battery_refresh(battery); | |
9e50bc14 | 1083 | acpi_battery_update(battery, false); |
f1d4661a | 1084 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1085 | dev_name(&device->dev), event, |
9ea7d575 | 1086 | acpi_battery_present(battery)); |
411e0f77 | 1087 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1088 | /* acpi_battery_update could remove power_supply object */ |
297d716f KK |
1089 | if (old && battery->bat) |
1090 | power_supply_changed(battery->bat); | |
1da177e4 LT |
1091 | } |
1092 | ||
25be5821 KM |
1093 | static int battery_notify(struct notifier_block *nb, |
1094 | unsigned long mode, void *_unused) | |
1095 | { | |
1096 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1097 | pm_nb); | |
9e50bc14 LT |
1098 | int result; |
1099 | ||
25be5821 | 1100 | switch (mode) { |
d5a5911b | 1101 | case PM_POST_HIBERNATION: |
25be5821 | 1102 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1103 | if (!acpi_battery_present(battery)) |
1104 | return 0; | |
1105 | ||
31f7dc79 | 1106 | if (!battery->bat) { |
9e50bc14 LT |
1107 | result = acpi_battery_get_info(battery); |
1108 | if (result) | |
1109 | return result; | |
1110 | ||
1111 | result = sysfs_add_battery(battery); | |
1112 | if (result) | |
1113 | return result; | |
1114 | } else | |
1115 | acpi_battery_refresh(battery); | |
1116 | ||
1117 | acpi_battery_init_alarm(battery); | |
1118 | acpi_battery_get_state(battery); | |
25be5821 KM |
1119 | break; |
1120 | } | |
1121 | ||
1122 | return 0; | |
1123 | } | |
1124 | ||
048d16da MK |
1125 | static int __init |
1126 | battery_bix_broken_package_quirk(const struct dmi_system_id *d) | |
3f5dc08f AM |
1127 | { |
1128 | battery_bix_broken_package = 1; | |
1129 | return 0; | |
1130 | } | |
1131 | ||
048d16da MK |
1132 | static int __init |
1133 | battery_notification_delay_quirk(const struct dmi_system_id *d) | |
f43691c6 AM |
1134 | { |
1135 | battery_notification_delay_ms = 1000; | |
1136 | return 0; | |
1137 | } | |
1138 | ||
048d16da | 1139 | static const struct dmi_system_id bat_dmi_table[] __initconst = { |
a90b4038 | 1140 | { |
3f5dc08f | 1141 | .callback = battery_bix_broken_package_quirk, |
a90b4038 LT |
1142 | .ident = "NEC LZ750/LS", |
1143 | .matches = { | |
1144 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1145 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1146 | }, | |
1147 | }, | |
f43691c6 AM |
1148 | { |
1149 | .callback = battery_notification_delay_quirk, | |
1150 | .ident = "Acer Aspire V5-573G", | |
1151 | .matches = { | |
1152 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1153 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), | |
1154 | }, | |
1155 | }, | |
a90b4038 LT |
1156 | {}, |
1157 | }; | |
1158 | ||
75646e75 LT |
1159 | /* |
1160 | * Some machines'(E,G Lenovo Z480) ECs are not stable | |
1161 | * during boot up and this causes battery driver fails to be | |
1162 | * probed due to failure of getting battery information | |
1163 | * from EC sometimes. After several retries, the operation | |
1164 | * may work. So add retry code here and 20ms sleep between | |
1165 | * every retries. | |
1166 | */ | |
1167 | static int acpi_battery_update_retry(struct acpi_battery *battery) | |
1168 | { | |
1169 | int retry, ret; | |
1170 | ||
1171 | for (retry = 5; retry; retry--) { | |
1172 | ret = acpi_battery_update(battery, false); | |
1173 | if (!ret) | |
1174 | break; | |
1175 | ||
1176 | msleep(20); | |
1177 | } | |
1178 | return ret; | |
1179 | } | |
1180 | ||
4be44fcd | 1181 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1182 | { |
4be44fcd | 1183 | int result = 0; |
4be44fcd | 1184 | struct acpi_battery *battery = NULL; |
952c63e9 | 1185 | |
1da177e4 | 1186 | if (!device) |
d550d98d | 1187 | return -EINVAL; |
40e7fcb1 LT |
1188 | |
1189 | if (device->dep_unmet) | |
1190 | return -EPROBE_DEFER; | |
1191 | ||
36bcbec7 | 1192 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1193 | if (!battery) |
d550d98d | 1194 | return -ENOMEM; |
145def84 | 1195 | battery->device = device; |
1da177e4 LT |
1196 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1197 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1198 | device->driver_data = battery; |
038fdea2 | 1199 | mutex_init(&battery->lock); |
69d94ec6 | 1200 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1201 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1202 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
75646e75 LT |
1203 | |
1204 | result = acpi_battery_update_retry(battery); | |
eb03cb02 SH |
1205 | if (result) |
1206 | goto fail; | |
75646e75 | 1207 | |
3a670cc7 LT |
1208 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1209 | result = acpi_battery_add_fs(device); | |
1210 | #endif | |
1211 | if (result) { | |
1212 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1213 | acpi_battery_remove_fs(device); | |
1214 | #endif | |
1215 | goto fail; | |
1216 | } | |
25be5821 | 1217 | |
e80bba4b SH |
1218 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1219 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1220 | device->status.battery_present ? "present" : "absent"); | |
1221 | ||
25be5821 KM |
1222 | battery->pm_nb.notifier_call = battery_notify; |
1223 | register_pm_notifier(&battery->pm_nb); | |
1224 | ||
e0d1f09e ZR |
1225 | device_init_wakeup(&device->dev, 1); |
1226 | ||
d550d98d | 1227 | return result; |
e80bba4b SH |
1228 | |
1229 | fail: | |
1230 | sysfs_remove_battery(battery); | |
1231 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1232 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1233 | kfree(battery); |
1234 | return result; | |
1da177e4 LT |
1235 | } |
1236 | ||
51fac838 | 1237 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1238 | { |
4be44fcd | 1239 | struct acpi_battery *battery = NULL; |
1da177e4 | 1240 | |
1da177e4 | 1241 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1242 | return -EINVAL; |
e0d1f09e | 1243 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1244 | battery = acpi_driver_data(device); |
25be5821 | 1245 | unregister_pm_notifier(&battery->pm_nb); |
3a670cc7 LT |
1246 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1247 | acpi_battery_remove_fs(device); | |
1248 | #endif | |
508df92d | 1249 | sysfs_remove_battery(battery); |
038fdea2 | 1250 | mutex_destroy(&battery->lock); |
69d94ec6 | 1251 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1252 | kfree(battery); |
d550d98d | 1253 | return 0; |
1da177e4 LT |
1254 | } |
1255 | ||
90692404 | 1256 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1257 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1258 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1259 | { |
1260 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1261 | |
1262 | if (!dev) | |
34c4415a | 1263 | return -EINVAL; |
a6f50dc8 RW |
1264 | |
1265 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1266 | if (!battery) | |
1267 | return -EINVAL; | |
1268 | ||
f1d4661a | 1269 | battery->update_time = 0; |
9e50bc14 | 1270 | acpi_battery_update(battery, true); |
b6ce4083 | 1271 | return 0; |
34c4415a | 1272 | } |
7f6895c6 SK |
1273 | #else |
1274 | #define acpi_battery_resume NULL | |
90692404 | 1275 | #endif |
34c4415a | 1276 | |
a6f50dc8 RW |
1277 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1278 | ||
aa650bbd AS |
1279 | static struct acpi_driver acpi_battery_driver = { |
1280 | .name = "battery", | |
1281 | .class = ACPI_BATTERY_CLASS, | |
1282 | .ids = battery_device_ids, | |
d9406691 | 1283 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1284 | .ops = { |
1285 | .add = acpi_battery_add, | |
aa650bbd | 1286 | .remove = acpi_battery_remove, |
d9406691 | 1287 | .notify = acpi_battery_notify, |
aa650bbd | 1288 | }, |
a6f50dc8 | 1289 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1290 | }; |
1291 | ||
b0cbc861 | 1292 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1293 | { |
479faaf0 LH |
1294 | int result; |
1295 | ||
3f5dc08f | 1296 | dmi_check_system(bat_dmi_table); |
479faaf0 | 1297 | |
3a670cc7 LT |
1298 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1299 | acpi_battery_dir = acpi_lock_battery_dir(); | |
1300 | if (!acpi_battery_dir) | |
1301 | return; | |
1302 | #endif | |
479faaf0 | 1303 | result = acpi_bus_register_driver(&acpi_battery_driver); |
3a670cc7 | 1304 | #ifdef CONFIG_ACPI_PROCFS_POWER |
479faaf0 | 1305 | if (result < 0) |
3a670cc7 LT |
1306 | acpi_unlock_battery_dir(acpi_battery_dir); |
1307 | #endif | |
0f66af53 AV |
1308 | } |
1309 | ||
1310 | static int __init acpi_battery_init(void) | |
1311 | { | |
e234b074 LH |
1312 | if (acpi_disabled) |
1313 | return -ENODEV; | |
1314 | ||
eca21d91 | 1315 | async_cookie = async_schedule(acpi_battery_init_async, NULL); |
d550d98d | 1316 | return 0; |
1da177e4 LT |
1317 | } |
1318 | ||
4be44fcd | 1319 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1320 | { |
5dfa0c73 | 1321 | async_synchronize_cookie(async_cookie + 1); |
1da177e4 | 1322 | acpi_bus_unregister_driver(&acpi_battery_driver); |
3a670cc7 LT |
1323 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1324 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1325 | #endif | |
1da177e4 LT |
1326 | } |
1327 | ||
1da177e4 LT |
1328 | module_init(acpi_battery_init); |
1329 | module_exit(acpi_battery_exit); |