Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
aa650bbd | 3 | * battery.c - ACPI Battery Driver (Revision: 2.0) |
1da177e4 | 4 | * |
aa650bbd AS |
5 | * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
6 | * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> | |
1da177e4 LT |
7 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
8 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
1da177e4 LT |
9 | */ |
10 | ||
bd8c5d1e | 11 | #define pr_fmt(fmt) "ACPI: battery: " fmt |
fa93854f | 12 | |
53dd200a DR |
13 | #include <linux/async.h> |
14 | #include <linux/delay.h> | |
15 | #include <linux/dmi.h> | |
16 | #include <linux/jiffies.h> | |
1da177e4 | 17 | #include <linux/kernel.h> |
fa93854f | 18 | #include <linux/list.h> |
1da177e4 | 19 | #include <linux/module.h> |
fa93854f | 20 | #include <linux/mutex.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
25be5821 | 22 | #include <linux/suspend.h> |
53dd200a DR |
23 | #include <linux/types.h> |
24 | ||
4000e626 | 25 | #include <asm/unaligned.h> |
d7380965 | 26 | |
8b48463f | 27 | #include <linux/acpi.h> |
d7380965 AS |
28 | #include <linux/power_supply.h> |
29 | ||
fa93854f | 30 | #include <acpi/battery.h> |
f03be352 | 31 | |
1da177e4 | 32 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
cc99f0ad HG |
33 | #define ACPI_BATTERY_CAPACITY_VALID(capacity) \ |
34 | ((capacity) != 0 && (capacity) != ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 | 35 | |
1da177e4 | 36 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 | 37 | |
ae6f6187 LT |
38 | /* Battery power unit: 0 means mW, 1 means mA */ |
39 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
40 | ||
1ac5aaa6 ZR |
41 | #define ACPI_BATTERY_STATE_DISCHARGING 0x1 |
42 | #define ACPI_BATTERY_STATE_CHARGING 0x2 | |
43 | #define ACPI_BATTERY_STATE_CRITICAL 0x4 | |
44 | ||
91507d25 AW |
45 | #define MAX_STRING_LENGTH 64 |
46 | ||
f52fd66d | 47 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 48 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 49 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
50 | MODULE_LICENSE("GPL"); |
51 | ||
eca21d91 | 52 | static async_cookie_t async_cookie; |
bc39fbcf | 53 | static bool battery_driver_registered; |
a90b4038 | 54 | static int battery_bix_broken_package; |
f43691c6 | 55 | static int battery_notification_delay_ms; |
1b799c5c | 56 | static int battery_ac_is_broken; |
f1d4661a AS |
57 | static unsigned int cache_time = 1000; |
58 | module_param(cache_time, uint, 0644); | |
59 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 60 | |
1ba90e3a TR |
61 | static const struct acpi_device_id battery_device_ids[] = { |
62 | {"PNP0C0A", 0}, | |
7dacee0b ML |
63 | |
64 | /* Microsoft Surface Go 3 */ | |
65 | {"MSHW0146", 0}, | |
66 | ||
1ba90e3a TR |
67 | {"", 0}, |
68 | }; | |
1ba90e3a | 69 | |
aa650bbd | 70 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 71 | |
7b3bcc4a AS |
72 | enum { |
73 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 74 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 75 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 | 76 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
65545abd XT |
77 | * switches between mWh and mAh depending on whether the system |
78 | * is running on battery or not. When mAh is the unit, most | |
79 | * reported values are incorrect and need to be adjusted by | |
80 | * 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
81 | * Pre-2010 and 2012 models appear to always report in mWh and | |
82 | * are thus unaffected (tested with t42, t61, t500, x200, x300, | |
83 | * and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
84 | * the 2011 models that fixes the issue (tested on x220 with a | |
85 | * post-1.29 BIOS), but as of Nov. 2012, no such update is | |
86 | * available for the 2010 models. | |
87 | */ | |
4000e626 | 88 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, |
a20136a6 LT |
89 | /* for batteries reporting current capacity with design capacity |
90 | * on a full charge, but showing degradation in full charge cap. | |
91 | */ | |
92 | ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, | |
7b3bcc4a | 93 | }; |
78490d82 | 94 | |
1da177e4 | 95 | struct acpi_battery { |
038fdea2 | 96 | struct mutex lock; |
69d94ec6 | 97 | struct mutex sysfs_lock; |
297d716f KK |
98 | struct power_supply *bat; |
99 | struct power_supply_desc bat_desc; | |
f1d4661a | 100 | struct acpi_device *device; |
25be5821 | 101 | struct notifier_block pm_nb; |
fa93854f | 102 | struct list_head list; |
f1d4661a | 103 | unsigned long update_time; |
016d5baa | 104 | int revision; |
7faa144a | 105 | int rate_now; |
d7380965 AS |
106 | int capacity_now; |
107 | int voltage_now; | |
038fdea2 | 108 | int design_capacity; |
d7380965 | 109 | int full_charge_capacity; |
038fdea2 AS |
110 | int technology; |
111 | int design_voltage; | |
112 | int design_capacity_warning; | |
113 | int design_capacity_low; | |
c67fcd67 AS |
114 | int cycle_count; |
115 | int measurement_accuracy; | |
116 | int max_sampling_time; | |
117 | int min_sampling_time; | |
118 | int max_averaging_interval; | |
119 | int min_averaging_interval; | |
038fdea2 AS |
120 | int capacity_granularity_1; |
121 | int capacity_granularity_2; | |
f1d4661a | 122 | int alarm; |
91507d25 AW |
123 | char model_number[MAX_STRING_LENGTH]; |
124 | char serial_number[MAX_STRING_LENGTH]; | |
125 | char type[MAX_STRING_LENGTH]; | |
126 | char oem_info[MAX_STRING_LENGTH]; | |
f1d4661a AS |
127 | int state; |
128 | int power_unit; | |
7b3bcc4a | 129 | unsigned long flags; |
1da177e4 LT |
130 | }; |
131 | ||
297d716f | 132 | #define to_acpi_battery(x) power_supply_get_drvdata(x) |
d7380965 | 133 | |
efd941f1 | 134 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 135 | { |
78490d82 AS |
136 | return battery->device->status.battery_present; |
137 | } | |
038fdea2 | 138 | |
d7380965 AS |
139 | static int acpi_battery_technology(struct acpi_battery *battery) |
140 | { | |
141 | if (!strcasecmp("NiCd", battery->type)) | |
142 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
143 | if (!strcasecmp("NiMH", battery->type)) | |
144 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
145 | if (!strcasecmp("LION", battery->type)) | |
146 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 147 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 148 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
149 | if (!strcasecmp("LiP", battery->type)) |
150 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
151 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
152 | } | |
153 | ||
9104476e | 154 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 155 | |
56f382a0 RH |
156 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
157 | { | |
1ac5aaa6 | 158 | /* charging, discharging or critical low */ |
56f382a0 RH |
159 | if (battery->state != 0) |
160 | return 0; | |
161 | ||
162 | /* battery not reporting charge */ | |
163 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
164 | battery->capacity_now == 0) | |
165 | return 0; | |
166 | ||
167 | /* good batteries update full_charge as the batteries degrade */ | |
168 | if (battery->full_charge_capacity == battery->capacity_now) | |
169 | return 1; | |
170 | ||
171 | /* fallback to using design values for broken batteries */ | |
2835f327 | 172 | if (battery->design_capacity <= battery->capacity_now) |
56f382a0 RH |
173 | return 1; |
174 | ||
175 | /* we don't do any sort of metric based on percentages */ | |
176 | return 0; | |
177 | } | |
178 | ||
a20136a6 LT |
179 | static bool acpi_battery_is_degraded(struct acpi_battery *battery) |
180 | { | |
cc99f0ad HG |
181 | return ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) && |
182 | ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity) && | |
a20136a6 LT |
183 | battery->full_charge_capacity < battery->design_capacity; |
184 | } | |
185 | ||
19fffc84 HG |
186 | static int acpi_battery_handle_discharging(struct acpi_battery *battery) |
187 | { | |
188 | /* | |
189 | * Some devices wrongly report discharging if the battery's charge level | |
190 | * was above the device's start charging threshold atm the AC adapter | |
191 | * was plugged in and the device thus did not start a new charge cycle. | |
192 | */ | |
1b799c5c HG |
193 | if ((battery_ac_is_broken || power_supply_is_system_supplied()) && |
194 | battery->rate_now == 0) | |
19fffc84 HG |
195 | return POWER_SUPPLY_STATUS_NOT_CHARGING; |
196 | ||
197 | return POWER_SUPPLY_STATUS_DISCHARGING; | |
198 | } | |
199 | ||
d7380965 AS |
200 | static int acpi_battery_get_property(struct power_supply *psy, |
201 | enum power_supply_property psp, | |
202 | union power_supply_propval *val) | |
203 | { | |
5b74d1d1 | 204 | int full_capacity = ACPI_BATTERY_VALUE_UNKNOWN, ret = 0; |
d7380965 AS |
205 | struct acpi_battery *battery = to_acpi_battery(psy); |
206 | ||
9104476e AS |
207 | if (acpi_battery_present(battery)) { |
208 | /* run battery update only if it is present */ | |
209 | acpi_battery_get_state(battery); | |
210 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
211 | return -ENODEV; |
212 | switch (psp) { | |
213 | case POWER_SUPPLY_PROP_STATUS: | |
82bf43b2 | 214 | if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) |
19fffc84 | 215 | val->intval = acpi_battery_handle_discharging(battery); |
82bf43b2 | 216 | else if (battery->state & ACPI_BATTERY_STATE_CHARGING) |
d7380965 | 217 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
56f382a0 | 218 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 219 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad | 220 | else |
185d2069 | 221 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
d7380965 AS |
222 | break; |
223 | case POWER_SUPPLY_PROP_PRESENT: | |
224 | val->intval = acpi_battery_present(battery); | |
225 | break; | |
226 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
227 | val->intval = acpi_battery_technology(battery); | |
228 | break; | |
c67fcd67 AS |
229 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
230 | val->intval = battery->cycle_count; | |
231 | break; | |
d7380965 | 232 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
233 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
234 | ret = -ENODEV; | |
235 | else | |
236 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
237 | break; |
238 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
239 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
240 | ret = -ENODEV; | |
241 | else | |
242 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
243 | break; |
244 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 245 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
246 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
247 | ret = -ENODEV; | |
248 | else | |
249 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
250 | break; |
251 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
252 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
cc99f0ad | 253 | if (!ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) |
a1b4bd69 RW |
254 | ret = -ENODEV; |
255 | else | |
256 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
257 | break; |
258 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
259 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
cc99f0ad | 260 | if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity)) |
a1b4bd69 RW |
261 | ret = -ENODEV; |
262 | else | |
263 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
264 | break; |
265 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
266 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
267 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
268 | ret = -ENODEV; | |
269 | else | |
270 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 271 | break; |
a58e1150 | 272 | case POWER_SUPPLY_PROP_CAPACITY: |
5b74d1d1 HG |
273 | if (ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity)) |
274 | full_capacity = battery->full_charge_capacity; | |
275 | else if (ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) | |
276 | full_capacity = battery->design_capacity; | |
277 | ||
cc99f0ad | 278 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || |
5b74d1d1 | 279 | full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
cc99f0ad HG |
280 | ret = -ENODEV; |
281 | else | |
a58e1150 | 282 | val->intval = battery->capacity_now * 100/ |
5b74d1d1 | 283 | full_capacity; |
a58e1150 | 284 | break; |
1ac5aaa6 ZR |
285 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
286 | if (battery->state & ACPI_BATTERY_STATE_CRITICAL) | |
287 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
288 | else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
289 | (battery->capacity_now <= battery->alarm)) | |
290 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
291 | else if (acpi_battery_is_charged(battery)) | |
292 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
293 | else | |
294 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
295 | break; | |
d7380965 AS |
296 | case POWER_SUPPLY_PROP_MODEL_NAME: |
297 | val->strval = battery->model_number; | |
298 | break; | |
299 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
300 | val->strval = battery->oem_info; | |
301 | break; | |
7c2670bb | 302 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
303 | val->strval = battery->serial_number; | |
304 | break; | |
d7380965 | 305 | default: |
a1b4bd69 | 306 | ret = -EINVAL; |
d7380965 | 307 | } |
a1b4bd69 | 308 | return ret; |
d7380965 AS |
309 | } |
310 | ||
311 | static enum power_supply_property charge_battery_props[] = { | |
312 | POWER_SUPPLY_PROP_STATUS, | |
313 | POWER_SUPPLY_PROP_PRESENT, | |
314 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 315 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
316 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
317 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
318 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
319 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
320 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
321 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 322 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 323 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
324 | POWER_SUPPLY_PROP_MODEL_NAME, |
325 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 326 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
327 | }; |
328 | ||
ff3154d1 HG |
329 | static enum power_supply_property charge_battery_full_cap_broken_props[] = { |
330 | POWER_SUPPLY_PROP_STATUS, | |
331 | POWER_SUPPLY_PROP_PRESENT, | |
332 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
333 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
334 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
335 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
336 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
337 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
338 | POWER_SUPPLY_PROP_MODEL_NAME, | |
339 | POWER_SUPPLY_PROP_MANUFACTURER, | |
340 | POWER_SUPPLY_PROP_SERIAL_NUMBER, | |
341 | }; | |
342 | ||
d7380965 AS |
343 | static enum power_supply_property energy_battery_props[] = { |
344 | POWER_SUPPLY_PROP_STATUS, | |
345 | POWER_SUPPLY_PROP_PRESENT, | |
346 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 347 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
348 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
349 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 350 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
351 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
352 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
353 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 354 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 355 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
356 | POWER_SUPPLY_PROP_MODEL_NAME, |
357 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 358 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
359 | }; |
360 | ||
b41901a2 HG |
361 | static enum power_supply_property energy_battery_full_cap_broken_props[] = { |
362 | POWER_SUPPLY_PROP_STATUS, | |
363 | POWER_SUPPLY_PROP_PRESENT, | |
364 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
365 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
366 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
367 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
368 | POWER_SUPPLY_PROP_POWER_NOW, | |
369 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
370 | POWER_SUPPLY_PROP_MODEL_NAME, | |
371 | POWER_SUPPLY_PROP_MANUFACTURER, | |
372 | POWER_SUPPLY_PROP_SERIAL_NUMBER, | |
373 | }; | |
374 | ||
65545abd | 375 | /* Battery Management */ |
038fdea2 AS |
376 | struct acpi_offsets { |
377 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
378 | u8 mode; /* int or string? */ | |
379 | }; | |
b6ce4083 | 380 | |
a4658784 | 381 | static const struct acpi_offsets state_offsets[] = { |
038fdea2 | 382 | {offsetof(struct acpi_battery, state), 0}, |
7faa144a | 383 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
384 | {offsetof(struct acpi_battery, capacity_now), 0}, |
385 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 386 | }; |
b6ce4083 | 387 | |
a4658784 | 388 | static const struct acpi_offsets info_offsets[] = { |
038fdea2 AS |
389 | {offsetof(struct acpi_battery, power_unit), 0}, |
390 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 391 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
392 | {offsetof(struct acpi_battery, technology), 0}, |
393 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
394 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
395 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
396 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
397 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
398 | {offsetof(struct acpi_battery, model_number), 1}, | |
399 | {offsetof(struct acpi_battery, serial_number), 1}, | |
400 | {offsetof(struct acpi_battery, type), 1}, | |
401 | {offsetof(struct acpi_battery, oem_info), 1}, | |
402 | }; | |
b6ce4083 | 403 | |
a4658784 | 404 | static const struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 405 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
406 | {offsetof(struct acpi_battery, power_unit), 0}, |
407 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
408 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
409 | {offsetof(struct acpi_battery, technology), 0}, | |
410 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
411 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
412 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
413 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
414 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
415 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
416 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
417 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
418 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
419 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
420 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
421 | {offsetof(struct acpi_battery, model_number), 1}, | |
422 | {offsetof(struct acpi_battery, serial_number), 1}, | |
423 | {offsetof(struct acpi_battery, type), 1}, | |
424 | {offsetof(struct acpi_battery, oem_info), 1}, | |
425 | }; | |
426 | ||
038fdea2 AS |
427 | static int extract_package(struct acpi_battery *battery, |
428 | union acpi_object *package, | |
a4658784 | 429 | const struct acpi_offsets *offsets, int num) |
038fdea2 | 430 | { |
106449e8 | 431 | int i; |
038fdea2 | 432 | union acpi_object *element; |
65545abd | 433 | |
038fdea2 AS |
434 | if (package->type != ACPI_TYPE_PACKAGE) |
435 | return -EFAULT; | |
436 | for (i = 0; i < num; ++i) { | |
437 | if (package->package.count <= i) | |
438 | return -EFAULT; | |
439 | element = &package->package.elements[i]; | |
440 | if (offsets[i].mode) { | |
106449e8 | 441 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
91507d25 | 442 | u32 len = MAX_STRING_LENGTH; |
65545abd | 443 | |
a1a32ded AW |
444 | switch (element->type) { |
445 | case ACPI_TYPE_BUFFER: | |
446 | if (len > element->buffer.length + 1) | |
447 | len = element->buffer.length + 1; | |
448 | ||
449 | fallthrough; | |
450 | case ACPI_TYPE_STRING: | |
451 | strscpy(ptr, element->string.pointer, len); | |
452 | ||
453 | break; | |
454 | case ACPI_TYPE_INTEGER: | |
455 | strscpy(ptr, (u8 *)&element->integer.value, sizeof(u64) + 1); | |
456 | ||
457 | break; | |
458 | default: | |
b8a1bdb1 | 459 | *ptr = 0; /* don't have value */ |
a1a32ded | 460 | } |
038fdea2 | 461 | } else { |
b8a1bdb1 AS |
462 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
463 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
464 | element->integer.value : -1; | |
038fdea2 | 465 | } |
b6ce4083 | 466 | } |
b6ce4083 VL |
467 | return 0; |
468 | } | |
469 | ||
470 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
471 | { | |
aa650bbd | 472 | if (acpi_bus_get_status(battery->device)) { |
bd8c5d1e RW |
473 | acpi_handle_info(battery->device->handle, |
474 | "_STA evaluation failed\n"); | |
b6ce4083 VL |
475 | return -ENODEV; |
476 | } | |
aa650bbd | 477 | return 0; |
b6ce4083 VL |
478 | } |
479 | ||
2d09af4a DL |
480 | |
481 | static int extract_battery_info(const int use_bix, | |
482 | struct acpi_battery *battery, | |
483 | const struct acpi_buffer *buffer) | |
1da177e4 | 484 | { |
aa650bbd | 485 | int result = -EFAULT; |
1da177e4 | 486 | |
2d09af4a DL |
487 | if (use_bix && battery_bix_broken_package) |
488 | result = extract_package(battery, buffer->pointer, | |
a90b4038 LT |
489 | extended_info_offsets + 1, |
490 | ARRAY_SIZE(extended_info_offsets) - 1); | |
2d09af4a DL |
491 | else if (use_bix) |
492 | result = extract_package(battery, buffer->pointer, | |
c67fcd67 AS |
493 | extended_info_offsets, |
494 | ARRAY_SIZE(extended_info_offsets)); | |
495 | else | |
2d09af4a | 496 | result = extract_package(battery, buffer->pointer, |
c67fcd67 | 497 | info_offsets, ARRAY_SIZE(info_offsets)); |
557d5868 ZR |
498 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
499 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
500 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
501 | battery->power_unit && battery->design_voltage) { | |
502 | battery->design_capacity = battery->design_capacity * | |
503 | 10000 / battery->design_voltage; | |
504 | battery->full_charge_capacity = battery->full_charge_capacity * | |
505 | 10000 / battery->design_voltage; | |
506 | battery->design_capacity_warning = | |
507 | battery->design_capacity_warning * | |
508 | 10000 / battery->design_voltage; | |
509 | /* Curiously, design_capacity_low, unlike the rest of them, | |
65545abd XT |
510 | * is correct. |
511 | */ | |
4000e626 | 512 | /* capacity_granularity_* equal 1 on the systems tested, so |
65545abd XT |
513 | * it's impossible to tell if they would need an adjustment |
514 | * or not if their values were higher. | |
515 | */ | |
4000e626 | 516 | } |
a20136a6 LT |
517 | if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) && |
518 | battery->capacity_now > battery->full_charge_capacity) | |
519 | battery->capacity_now = battery->full_charge_capacity; | |
520 | ||
d550d98d | 521 | return result; |
1da177e4 LT |
522 | } |
523 | ||
2d09af4a DL |
524 | static int acpi_battery_get_info(struct acpi_battery *battery) |
525 | { | |
526 | const int xinfo = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); | |
527 | int use_bix; | |
528 | int result = -ENODEV; | |
529 | ||
530 | if (!acpi_battery_present(battery)) | |
531 | return 0; | |
532 | ||
533 | ||
534 | for (use_bix = xinfo ? 1 : 0; use_bix >= 0; use_bix--) { | |
535 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
536 | acpi_status status = AE_ERROR; | |
537 | ||
538 | mutex_lock(&battery->lock); | |
539 | status = acpi_evaluate_object(battery->device->handle, | |
540 | use_bix ? "_BIX":"_BIF", | |
541 | NULL, &buffer); | |
542 | mutex_unlock(&battery->lock); | |
543 | ||
544 | if (ACPI_FAILURE(status)) { | |
bd8c5d1e RW |
545 | acpi_handle_info(battery->device->handle, |
546 | "%s evaluation failed: %s\n", | |
65545abd XT |
547 | use_bix ? "_BIX":"_BIF", |
548 | acpi_format_exception(status)); | |
2d09af4a DL |
549 | } else { |
550 | result = extract_battery_info(use_bix, | |
551 | battery, | |
552 | &buffer); | |
553 | ||
554 | kfree(buffer.pointer); | |
555 | break; | |
556 | } | |
557 | } | |
558 | ||
559 | if (!result && !use_bix && xinfo) | |
560 | pr_warn(FW_BUG "The _BIX method is broken, using _BIF.\n"); | |
561 | ||
562 | return result; | |
563 | } | |
564 | ||
b6ce4083 | 565 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 566 | { |
4be44fcd LB |
567 | int result = 0; |
568 | acpi_status status = 0; | |
569 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 570 | |
b6ce4083 VL |
571 | if (!acpi_battery_present(battery)) |
572 | return 0; | |
1da177e4 | 573 | |
f1d4661a AS |
574 | if (battery->update_time && |
575 | time_before(jiffies, battery->update_time + | |
576 | msecs_to_jiffies(cache_time))) | |
577 | return 0; | |
578 | ||
038fdea2 | 579 | mutex_lock(&battery->lock); |
f1d4661a | 580 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
581 | NULL, &buffer); |
582 | mutex_unlock(&battery->lock); | |
5b31d895 | 583 | |
1da177e4 | 584 | if (ACPI_FAILURE(status)) { |
bd8c5d1e RW |
585 | acpi_handle_info(battery->device->handle, |
586 | "_BST evaluation failed: %s", | |
587 | acpi_format_exception(status)); | |
d550d98d | 588 | return -ENODEV; |
1da177e4 | 589 | } |
aa650bbd | 590 | |
038fdea2 AS |
591 | result = extract_package(battery, buffer.pointer, |
592 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 593 | battery->update_time = jiffies; |
78490d82 | 594 | kfree(buffer.pointer); |
bc76f90b | 595 | |
55003b21 LT |
596 | /* For buggy DSDTs that report negative 16-bit values for either |
597 | * charging or discharging current and/or report 0 as 65536 | |
598 | * due to bad math. | |
599 | */ | |
600 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
601 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
602 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 603 | battery->rate_now = abs((s16)battery->rate_now); |
bd8c5d1e | 604 | pr_warn_once(FW_BUG "(dis)charge rate invalid.\n"); |
55003b21 | 605 | } |
bc76f90b | 606 | |
557d5868 ZR |
607 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
608 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
609 | battery->capacity_now = (battery->capacity_now * | |
610 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
611 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
612 | battery->power_unit && battery->design_voltage) { | |
613 | battery->capacity_now = battery->capacity_now * | |
614 | 10000 / battery->design_voltage; | |
615 | } | |
a20136a6 LT |
616 | if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) && |
617 | battery->capacity_now > battery->full_charge_capacity) | |
618 | battery->capacity_now = battery->full_charge_capacity; | |
619 | ||
b6ce4083 VL |
620 | return result; |
621 | } | |
1da177e4 | 622 | |
aa650bbd | 623 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 624 | { |
4be44fcd | 625 | acpi_status status = 0; |
1da177e4 | 626 | |
c67fcd67 | 627 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 628 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 629 | return -ENODEV; |
1da177e4 | 630 | |
038fdea2 | 631 | mutex_lock(&battery->lock); |
0db98202 JL |
632 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
633 | battery->alarm); | |
038fdea2 | 634 | mutex_unlock(&battery->lock); |
aa650bbd | 635 | |
1da177e4 | 636 | if (ACPI_FAILURE(status)) |
d550d98d | 637 | return -ENODEV; |
1da177e4 | 638 | |
bd8c5d1e RW |
639 | acpi_handle_debug(battery->device->handle, "Alarm set to %d\n", |
640 | battery->alarm); | |
641 | ||
d550d98d | 642 | return 0; |
1da177e4 LT |
643 | } |
644 | ||
b6ce4083 | 645 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 646 | { |
b6ce4083 | 647 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 648 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 649 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 650 | return 0; |
b6ce4083 | 651 | } |
7b3bcc4a | 652 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
653 | if (!battery->alarm) |
654 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 655 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 656 | } |
1da177e4 | 657 | |
508df92d AB |
658 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
659 | struct device_attribute *attr, | |
660 | char *buf) | |
661 | { | |
662 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
65545abd | 663 | |
508df92d AB |
664 | return sprintf(buf, "%d\n", battery->alarm * 1000); |
665 | } | |
666 | ||
667 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
668 | struct device_attribute *attr, | |
669 | const char *buf, size_t count) | |
670 | { | |
671 | unsigned long x; | |
672 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
65545abd | 673 | |
47a08c85 | 674 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
675 | battery->alarm = x/1000; |
676 | if (acpi_battery_present(battery)) | |
677 | acpi_battery_set_alarm(battery); | |
678 | return count; | |
679 | } | |
680 | ||
82d2b610 | 681 | static const struct device_attribute alarm_attr = { |
01e8ef11 | 682 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
683 | .show = acpi_battery_alarm_show, |
684 | .store = acpi_battery_alarm_store, | |
685 | }; | |
686 | ||
fa93854f OG |
687 | /* |
688 | * The Battery Hooking API | |
689 | * | |
690 | * This API is used inside other drivers that need to expose | |
691 | * platform-specific behaviour within the generic driver in a | |
692 | * generic way. | |
693 | * | |
694 | */ | |
695 | ||
696 | static LIST_HEAD(acpi_battery_list); | |
697 | static LIST_HEAD(battery_hook_list); | |
698 | static DEFINE_MUTEX(hook_mutex); | |
699 | ||
514bcc5d | 700 | static void __battery_hook_unregister(struct acpi_battery_hook *hook, int lock) |
fa93854f OG |
701 | { |
702 | struct acpi_battery *battery; | |
703 | /* | |
704 | * In order to remove a hook, we first need to | |
705 | * de-register all the batteries that are registered. | |
706 | */ | |
707 | if (lock) | |
708 | mutex_lock(&hook_mutex); | |
709 | list_for_each_entry(battery, &acpi_battery_list, list) { | |
456ed864 | 710 | if (!hook->remove_battery(battery->bat, hook)) |
98b0cf20 | 711 | power_supply_changed(battery->bat); |
fa93854f OG |
712 | } |
713 | list_del(&hook->list); | |
714 | if (lock) | |
715 | mutex_unlock(&hook_mutex); | |
716 | pr_info("extension unregistered: %s\n", hook->name); | |
717 | } | |
718 | ||
719 | void battery_hook_unregister(struct acpi_battery_hook *hook) | |
720 | { | |
721 | __battery_hook_unregister(hook, 1); | |
722 | } | |
723 | EXPORT_SYMBOL_GPL(battery_hook_unregister); | |
724 | ||
725 | void battery_hook_register(struct acpi_battery_hook *hook) | |
726 | { | |
727 | struct acpi_battery *battery; | |
728 | ||
729 | mutex_lock(&hook_mutex); | |
730 | INIT_LIST_HEAD(&hook->list); | |
731 | list_add(&hook->list, &battery_hook_list); | |
732 | /* | |
733 | * Now that the driver is registered, we need | |
734 | * to notify the hook that a battery is available | |
735 | * for each battery, so that the driver may add | |
736 | * its attributes. | |
737 | */ | |
738 | list_for_each_entry(battery, &acpi_battery_list, list) { | |
878a82c2 | 739 | if (hook->add_battery(battery->bat, hook)) { |
fa93854f OG |
740 | /* |
741 | * If a add-battery returns non-zero, | |
742 | * the registration of the extension has failed, | |
743 | * and we will not add it to the list of loaded | |
744 | * hooks. | |
745 | */ | |
746 | pr_err("extension failed to load: %s", hook->name); | |
747 | __battery_hook_unregister(hook, 0); | |
673b4271 | 748 | goto end; |
fa93854f | 749 | } |
98b0cf20 AW |
750 | |
751 | power_supply_changed(battery->bat); | |
fa93854f OG |
752 | } |
753 | pr_info("new extension: %s\n", hook->name); | |
673b4271 | 754 | end: |
fa93854f OG |
755 | mutex_unlock(&hook_mutex); |
756 | } | |
757 | EXPORT_SYMBOL_GPL(battery_hook_register); | |
758 | ||
759 | /* | |
760 | * This function gets called right after the battery sysfs | |
761 | * attributes have been added, so that the drivers that | |
762 | * define custom sysfs attributes can add their own. | |
65545abd | 763 | */ |
fa93854f OG |
764 | static void battery_hook_add_battery(struct acpi_battery *battery) |
765 | { | |
673b4271 | 766 | struct acpi_battery_hook *hook_node, *tmp; |
fa93854f OG |
767 | |
768 | mutex_lock(&hook_mutex); | |
769 | INIT_LIST_HEAD(&battery->list); | |
770 | list_add(&battery->list, &acpi_battery_list); | |
771 | /* | |
772 | * Since we added a new battery to the list, we need to | |
773 | * iterate over the hooks and call add_battery for each | |
774 | * hook that was registered. This usually happens | |
775 | * when a battery gets hotplugged or initialized | |
776 | * during the battery module initialization. | |
777 | */ | |
673b4271 | 778 | list_for_each_entry_safe(hook_node, tmp, &battery_hook_list, list) { |
878a82c2 | 779 | if (hook_node->add_battery(battery->bat, hook_node)) { |
fa93854f OG |
780 | /* |
781 | * The notification of the extensions has failed, to | |
782 | * prevent further errors we will unload the extension. | |
783 | */ | |
fa93854f OG |
784 | pr_err("error in extension, unloading: %s", |
785 | hook_node->name); | |
673b4271 | 786 | __battery_hook_unregister(hook_node, 0); |
fa93854f OG |
787 | } |
788 | } | |
789 | mutex_unlock(&hook_mutex); | |
790 | } | |
791 | ||
792 | static void battery_hook_remove_battery(struct acpi_battery *battery) | |
793 | { | |
794 | struct acpi_battery_hook *hook; | |
795 | ||
796 | mutex_lock(&hook_mutex); | |
797 | /* | |
798 | * Before removing the hook, we need to remove all | |
799 | * custom attributes from the battery. | |
800 | */ | |
801 | list_for_each_entry(hook, &battery_hook_list, list) { | |
878a82c2 | 802 | hook->remove_battery(battery->bat, hook); |
fa93854f OG |
803 | } |
804 | /* Then, just remove the battery from the list */ | |
805 | list_del(&battery->list); | |
806 | mutex_unlock(&hook_mutex); | |
807 | } | |
808 | ||
809 | static void __exit battery_hook_exit(void) | |
810 | { | |
811 | struct acpi_battery_hook *hook; | |
812 | struct acpi_battery_hook *ptr; | |
813 | /* | |
814 | * At this point, the acpi_bus_unregister_driver() | |
815 | * has called remove for all batteries. We just | |
816 | * need to remove the hooks. | |
817 | */ | |
818 | list_for_each_entry_safe(hook, ptr, &battery_hook_list, list) { | |
819 | __battery_hook_unregister(hook, 1); | |
820 | } | |
821 | mutex_destroy(&hook_mutex); | |
822 | } | |
823 | ||
508df92d AB |
824 | static int sysfs_add_battery(struct acpi_battery *battery) |
825 | { | |
297d716f | 826 | struct power_supply_config psy_cfg = { .drv_data = battery, }; |
ff3154d1 HG |
827 | bool full_cap_broken = false; |
828 | ||
829 | if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) && | |
830 | !ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) | |
831 | full_cap_broken = true; | |
508df92d | 832 | |
ae6f6187 | 833 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
ff3154d1 HG |
834 | if (full_cap_broken) { |
835 | battery->bat_desc.properties = | |
836 | charge_battery_full_cap_broken_props; | |
837 | battery->bat_desc.num_properties = | |
838 | ARRAY_SIZE(charge_battery_full_cap_broken_props); | |
839 | } else { | |
840 | battery->bat_desc.properties = charge_battery_props; | |
841 | battery->bat_desc.num_properties = | |
842 | ARRAY_SIZE(charge_battery_props); | |
843 | } | |
508df92d | 844 | } else { |
ff3154d1 HG |
845 | if (full_cap_broken) { |
846 | battery->bat_desc.properties = | |
847 | energy_battery_full_cap_broken_props; | |
848 | battery->bat_desc.num_properties = | |
849 | ARRAY_SIZE(energy_battery_full_cap_broken_props); | |
850 | } else { | |
851 | battery->bat_desc.properties = energy_battery_props; | |
852 | battery->bat_desc.num_properties = | |
853 | ARRAY_SIZE(energy_battery_props); | |
854 | } | |
508df92d AB |
855 | } |
856 | ||
297d716f KK |
857 | battery->bat_desc.name = acpi_device_bid(battery->device); |
858 | battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; | |
859 | battery->bat_desc.get_property = acpi_battery_get_property; | |
508df92d | 860 | |
297d716f KK |
861 | battery->bat = power_supply_register_no_ws(&battery->device->dev, |
862 | &battery->bat_desc, &psy_cfg); | |
e0d1f09e | 863 | |
297d716f KK |
864 | if (IS_ERR(battery->bat)) { |
865 | int result = PTR_ERR(battery->bat); | |
866 | ||
867 | battery->bat = NULL; | |
508df92d | 868 | return result; |
297d716f | 869 | } |
fa93854f | 870 | battery_hook_add_battery(battery); |
297d716f | 871 | return device_create_file(&battery->bat->dev, &alarm_attr); |
508df92d AB |
872 | } |
873 | ||
874 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
875 | { | |
69d94ec6 | 876 | mutex_lock(&battery->sysfs_lock); |
297d716f | 877 | if (!battery->bat) { |
69d94ec6 | 878 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 879 | return; |
9c921c22 | 880 | } |
fa93854f | 881 | battery_hook_remove_battery(battery); |
297d716f KK |
882 | device_remove_file(&battery->bat->dev, &alarm_attr); |
883 | power_supply_unregister(battery->bat); | |
884 | battery->bat = NULL; | |
69d94ec6 | 885 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
886 | } |
887 | ||
4000e626 KI |
888 | static void find_battery(const struct dmi_header *dm, void *private) |
889 | { | |
890 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
891 | /* Note: the hardcoded offsets below have been extracted from | |
65545abd XT |
892 | * the source code of dmidecode. |
893 | */ | |
4000e626 KI |
894 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { |
895 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
896 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
65545abd | 897 | |
4000e626 KI |
898 | if (dm->length >= 18) |
899 | dmi_capacity *= dmi_data[17]; | |
900 | if (battery->design_capacity * battery->design_voltage / 1000 | |
901 | != dmi_capacity && | |
902 | battery->design_capacity * 10 == dmi_capacity) | |
903 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
904 | &battery->flags); | |
905 | } | |
906 | } | |
907 | ||
557d5868 ZR |
908 | /* |
909 | * According to the ACPI spec, some kinds of primary batteries can | |
910 | * report percentage battery remaining capacity directly to OS. | |
911 | * In this case, it reports the Last Full Charged Capacity == 100 | |
912 | * and BatteryPresentRate == 0xFFFFFFFF. | |
913 | * | |
914 | * Now we found some battery reports percentage remaining capacity | |
915 | * even if it's rechargeable. | |
916 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
917 | * | |
918 | * Handle this correctly so that they won't break userspace. | |
919 | */ | |
7b78622d | 920 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
921 | { |
922 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 923 | return; |
557d5868 | 924 | |
0f4c6547 NM |
925 | if (battery->full_charge_capacity == 100 && |
926 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
927 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
928 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
929 | battery->full_charge_capacity = battery->design_capacity; | |
930 | battery->capacity_now = (battery->capacity_now * | |
931 | battery->full_charge_capacity) / 100; | |
932 | } | |
4000e626 KI |
933 | |
934 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 935 | return; |
4000e626 KI |
936 | |
937 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
938 | const char *s; | |
65545abd | 939 | |
4000e626 | 940 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); |
ffd8a731 | 941 | if (s && !strncasecmp(s, "ThinkPad", 8)) { |
4000e626 KI |
942 | dmi_walk(find_battery, battery); |
943 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
944 | &battery->flags) && | |
945 | battery->design_voltage) { | |
946 | battery->design_capacity = | |
947 | battery->design_capacity * | |
948 | 10000 / battery->design_voltage; | |
949 | battery->full_charge_capacity = | |
950 | battery->full_charge_capacity * | |
951 | 10000 / battery->design_voltage; | |
952 | battery->design_capacity_warning = | |
953 | battery->design_capacity_warning * | |
954 | 10000 / battery->design_voltage; | |
955 | battery->capacity_now = battery->capacity_now * | |
956 | 10000 / battery->design_voltage; | |
957 | } | |
958 | } | |
959 | } | |
a20136a6 LT |
960 | |
961 | if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags)) | |
962 | return; | |
963 | ||
964 | if (acpi_battery_is_degraded(battery) && | |
965 | battery->capacity_now > battery->full_charge_capacity) { | |
966 | set_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags); | |
967 | battery->capacity_now = battery->full_charge_capacity; | |
968 | } | |
557d5868 ZR |
969 | } |
970 | ||
9e50bc14 | 971 | static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
b6ce4083 | 972 | { |
82f2d305 LRM |
973 | int result = acpi_battery_get_status(battery); |
974 | ||
508df92d | 975 | if (result) |
b6ce4083 | 976 | return result; |
82f2d305 | 977 | |
508df92d AB |
978 | if (!acpi_battery_present(battery)) { |
979 | sysfs_remove_battery(battery); | |
97749cd9 | 980 | battery->update_time = 0; |
508df92d | 981 | return 0; |
b6ce4083 | 982 | } |
9e50bc14 LT |
983 | |
984 | if (resume) | |
985 | return 0; | |
986 | ||
82f2d305 | 987 | if (!battery->update_time) { |
97749cd9 AS |
988 | result = acpi_battery_get_info(battery); |
989 | if (result) | |
990 | return result; | |
991 | acpi_battery_init_alarm(battery); | |
992 | } | |
12c78ca2 CG |
993 | |
994 | result = acpi_battery_get_state(battery); | |
995 | if (result) | |
996 | return result; | |
997 | acpi_battery_quirks(battery); | |
998 | ||
297d716f | 999 | if (!battery->bat) { |
eb03cb02 SH |
1000 | result = sysfs_add_battery(battery); |
1001 | if (result) | |
1002 | return result; | |
1003 | } | |
e0d1f09e ZR |
1004 | |
1005 | /* | |
1006 | * Wakeup the system if battery is critical low | |
1007 | * or lower than the alarm level | |
1008 | */ | |
1009 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
1010 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
c6237b21 | 1011 | (battery->capacity_now <= battery->alarm))) |
33e4f80e | 1012 | acpi_pm_wakeup_event(&battery->device->dev); |
e0d1f09e | 1013 | |
557d5868 | 1014 | return result; |
4bd35cdb VL |
1015 | } |
1016 | ||
da8aeb92 RW |
1017 | static void acpi_battery_refresh(struct acpi_battery *battery) |
1018 | { | |
c5971456 AW |
1019 | int power_unit; |
1020 | ||
297d716f | 1021 | if (!battery->bat) |
da8aeb92 RW |
1022 | return; |
1023 | ||
c5971456 AW |
1024 | power_unit = battery->power_unit; |
1025 | ||
da8aeb92 | 1026 | acpi_battery_get_info(battery); |
c5971456 AW |
1027 | |
1028 | if (power_unit == battery->power_unit) | |
1029 | return; | |
1030 | ||
1031 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
1032 | sysfs_remove_battery(battery); |
1033 | sysfs_add_battery(battery); | |
1034 | } | |
1035 | ||
65545abd | 1036 | /* Driver Interface */ |
d9406691 | 1037 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1038 | { |
d9406691 | 1039 | struct acpi_battery *battery = acpi_driver_data(device); |
297d716f | 1040 | struct power_supply *old; |
d9406691 | 1041 | |
1da177e4 | 1042 | if (!battery) |
d550d98d | 1043 | return; |
297d716f | 1044 | old = battery->bat; |
f43691c6 | 1045 | /* |
65545abd XT |
1046 | * On Acer Aspire V5-573G notifications are sometimes triggered too |
1047 | * early. For example, when AC is unplugged and notification is | |
1048 | * triggered, battery state is still reported as "Full", and changes to | |
1049 | * "Discharging" only after short delay, without any notification. | |
1050 | */ | |
f43691c6 AM |
1051 | if (battery_notification_delay_ms > 0) |
1052 | msleep(battery_notification_delay_ms); | |
da8aeb92 RW |
1053 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1054 | acpi_battery_refresh(battery); | |
9e50bc14 | 1055 | acpi_battery_update(battery, false); |
f1d4661a | 1056 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1057 | dev_name(&device->dev), event, |
9ea7d575 | 1058 | acpi_battery_present(battery)); |
411e0f77 | 1059 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1060 | /* acpi_battery_update could remove power_supply object */ |
297d716f KK |
1061 | if (old && battery->bat) |
1062 | power_supply_changed(battery->bat); | |
1da177e4 LT |
1063 | } |
1064 | ||
25be5821 KM |
1065 | static int battery_notify(struct notifier_block *nb, |
1066 | unsigned long mode, void *_unused) | |
1067 | { | |
1068 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1069 | pm_nb); | |
9e50bc14 LT |
1070 | int result; |
1071 | ||
25be5821 | 1072 | switch (mode) { |
d5a5911b | 1073 | case PM_POST_HIBERNATION: |
25be5821 | 1074 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1075 | if (!acpi_battery_present(battery)) |
1076 | return 0; | |
1077 | ||
2754435d DR |
1078 | if (battery->bat) { |
1079 | acpi_battery_refresh(battery); | |
1080 | } else { | |
9e50bc14 LT |
1081 | result = acpi_battery_get_info(battery); |
1082 | if (result) | |
1083 | return result; | |
1084 | ||
1085 | result = sysfs_add_battery(battery); | |
1086 | if (result) | |
1087 | return result; | |
2754435d | 1088 | } |
9e50bc14 LT |
1089 | |
1090 | acpi_battery_init_alarm(battery); | |
1091 | acpi_battery_get_state(battery); | |
25be5821 KM |
1092 | break; |
1093 | } | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
048d16da MK |
1098 | static int __init |
1099 | battery_bix_broken_package_quirk(const struct dmi_system_id *d) | |
3f5dc08f AM |
1100 | { |
1101 | battery_bix_broken_package = 1; | |
1102 | return 0; | |
1103 | } | |
1104 | ||
048d16da MK |
1105 | static int __init |
1106 | battery_notification_delay_quirk(const struct dmi_system_id *d) | |
f43691c6 AM |
1107 | { |
1108 | battery_notification_delay_ms = 1000; | |
1109 | return 0; | |
1110 | } | |
1111 | ||
1b799c5c HG |
1112 | static int __init |
1113 | battery_ac_is_broken_quirk(const struct dmi_system_id *d) | |
1114 | { | |
1115 | battery_ac_is_broken = 1; | |
1116 | return 0; | |
1117 | } | |
1118 | ||
048d16da | 1119 | static const struct dmi_system_id bat_dmi_table[] __initconst = { |
a90b4038 | 1120 | { |
91afa076 | 1121 | /* NEC LZ750/LS */ |
3f5dc08f | 1122 | .callback = battery_bix_broken_package_quirk, |
a90b4038 LT |
1123 | .matches = { |
1124 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1125 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1126 | }, | |
1127 | }, | |
f43691c6 | 1128 | { |
91afa076 | 1129 | /* Acer Aspire V5-573G */ |
f43691c6 | 1130 | .callback = battery_notification_delay_quirk, |
f43691c6 AM |
1131 | .matches = { |
1132 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1133 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), | |
1134 | }, | |
1135 | }, | |
1b799c5c HG |
1136 | { |
1137 | /* Point of View mobii wintab p800w */ | |
1138 | .callback = battery_ac_is_broken_quirk, | |
1139 | .matches = { | |
1140 | DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), | |
1141 | DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), | |
1142 | DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"), | |
1143 | /* Above matches are too generic, add bios-date match */ | |
1144 | DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"), | |
1145 | }, | |
1146 | }, | |
7dacee0b ML |
1147 | { |
1148 | /* Microsoft Surface Go 3 */ | |
1149 | .callback = battery_notification_delay_quirk, | |
1150 | .matches = { | |
1151 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), | |
1152 | DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"), | |
1153 | }, | |
1154 | }, | |
a90b4038 LT |
1155 | {}, |
1156 | }; | |
1157 | ||
75646e75 LT |
1158 | /* |
1159 | * Some machines'(E,G Lenovo Z480) ECs are not stable | |
1160 | * during boot up and this causes battery driver fails to be | |
1161 | * probed due to failure of getting battery information | |
1162 | * from EC sometimes. After several retries, the operation | |
1163 | * may work. So add retry code here and 20ms sleep between | |
1164 | * every retries. | |
1165 | */ | |
1166 | static int acpi_battery_update_retry(struct acpi_battery *battery) | |
1167 | { | |
1168 | int retry, ret; | |
1169 | ||
1170 | for (retry = 5; retry; retry--) { | |
1171 | ret = acpi_battery_update(battery, false); | |
1172 | if (!ret) | |
1173 | break; | |
1174 | ||
1175 | msleep(20); | |
1176 | } | |
1177 | return ret; | |
1178 | } | |
1179 | ||
4be44fcd | 1180 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1181 | { |
4be44fcd | 1182 | int result = 0; |
4be44fcd | 1183 | struct acpi_battery *battery = NULL; |
952c63e9 | 1184 | |
1da177e4 | 1185 | if (!device) |
d550d98d | 1186 | return -EINVAL; |
40e7fcb1 LT |
1187 | |
1188 | if (device->dep_unmet) | |
1189 | return -EPROBE_DEFER; | |
1190 | ||
36bcbec7 | 1191 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1192 | if (!battery) |
d550d98d | 1193 | return -ENOMEM; |
145def84 | 1194 | battery->device = device; |
1da177e4 LT |
1195 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1196 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1197 | device->driver_data = battery; |
038fdea2 | 1198 | mutex_init(&battery->lock); |
69d94ec6 | 1199 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1200 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1201 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
75646e75 LT |
1202 | |
1203 | result = acpi_battery_update_retry(battery); | |
eb03cb02 SH |
1204 | if (result) |
1205 | goto fail; | |
75646e75 | 1206 | |
bd8c5d1e | 1207 | pr_info("Slot [%s] (battery %s)\n", acpi_device_bid(device), |
e80bba4b SH |
1208 | device->status.battery_present ? "present" : "absent"); |
1209 | ||
25be5821 KM |
1210 | battery->pm_nb.notifier_call = battery_notify; |
1211 | register_pm_notifier(&battery->pm_nb); | |
1212 | ||
e0d1f09e ZR |
1213 | device_init_wakeup(&device->dev, 1); |
1214 | ||
d550d98d | 1215 | return result; |
e80bba4b SH |
1216 | |
1217 | fail: | |
1218 | sysfs_remove_battery(battery); | |
1219 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1220 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1221 | kfree(battery); |
1222 | return result; | |
1da177e4 LT |
1223 | } |
1224 | ||
6c0eb5ba | 1225 | static void acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1226 | { |
4be44fcd | 1227 | struct acpi_battery *battery = NULL; |
1da177e4 | 1228 | |
1da177e4 | 1229 | if (!device || !acpi_driver_data(device)) |
6c0eb5ba | 1230 | return; |
e0d1f09e | 1231 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1232 | battery = acpi_driver_data(device); |
25be5821 | 1233 | unregister_pm_notifier(&battery->pm_nb); |
508df92d | 1234 | sysfs_remove_battery(battery); |
038fdea2 | 1235 | mutex_destroy(&battery->lock); |
69d94ec6 | 1236 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1237 | kfree(battery); |
1da177e4 LT |
1238 | } |
1239 | ||
90692404 | 1240 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1241 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1242 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1243 | { |
1244 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1245 | |
1246 | if (!dev) | |
34c4415a | 1247 | return -EINVAL; |
a6f50dc8 RW |
1248 | |
1249 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1250 | if (!battery) | |
1251 | return -EINVAL; | |
1252 | ||
f1d4661a | 1253 | battery->update_time = 0; |
9e50bc14 | 1254 | acpi_battery_update(battery, true); |
b6ce4083 | 1255 | return 0; |
34c4415a | 1256 | } |
7f6895c6 SK |
1257 | #else |
1258 | #define acpi_battery_resume NULL | |
90692404 | 1259 | #endif |
34c4415a | 1260 | |
a6f50dc8 RW |
1261 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1262 | ||
aa650bbd AS |
1263 | static struct acpi_driver acpi_battery_driver = { |
1264 | .name = "battery", | |
1265 | .class = ACPI_BATTERY_CLASS, | |
1266 | .ids = battery_device_ids, | |
d9406691 | 1267 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1268 | .ops = { |
1269 | .add = acpi_battery_add, | |
aa650bbd | 1270 | .remove = acpi_battery_remove, |
d9406691 | 1271 | .notify = acpi_battery_notify, |
aa650bbd | 1272 | }, |
a6f50dc8 | 1273 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1274 | }; |
1275 | ||
b0cbc861 | 1276 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1277 | { |
479faaf0 LH |
1278 | int result; |
1279 | ||
57a18322 HG |
1280 | if (acpi_quirk_skip_acpi_ac_and_battery()) |
1281 | return; | |
479faaf0 | 1282 | |
57a18322 | 1283 | dmi_check_system(bat_dmi_table); |
ec625a37 | 1284 | |
479faaf0 | 1285 | result = acpi_bus_register_driver(&acpi_battery_driver); |
bc39fbcf | 1286 | battery_driver_registered = (result == 0); |
0f66af53 AV |
1287 | } |
1288 | ||
1289 | static int __init acpi_battery_init(void) | |
1290 | { | |
e234b074 LH |
1291 | if (acpi_disabled) |
1292 | return -ENODEV; | |
1293 | ||
eca21d91 | 1294 | async_cookie = async_schedule(acpi_battery_init_async, NULL); |
d550d98d | 1295 | return 0; |
1da177e4 LT |
1296 | } |
1297 | ||
4be44fcd | 1298 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1299 | { |
5dfa0c73 | 1300 | async_synchronize_cookie(async_cookie + 1); |
fa93854f | 1301 | if (battery_driver_registered) { |
bc39fbcf | 1302 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fa93854f OG |
1303 | battery_hook_exit(); |
1304 | } | |
1da177e4 LT |
1305 | } |
1306 | ||
1da177e4 LT |
1307 | module_init(acpi_battery_init); |
1308 | module_exit(acpi_battery_exit); |