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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 | ||
fa93854f OG |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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 | |
a192a958 LB |
32 | #define PREFIX "ACPI: " |
33 | ||
1da177e4 | 34 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
cc99f0ad HG |
35 | #define ACPI_BATTERY_CAPACITY_VALID(capacity) \ |
36 | ((capacity) != 0 && (capacity) != ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 | 37 | |
1da177e4 | 38 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 | 39 | |
ae6f6187 LT |
40 | /* Battery power unit: 0 means mW, 1 means mA */ |
41 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
42 | ||
1ac5aaa6 ZR |
43 | #define ACPI_BATTERY_STATE_DISCHARGING 0x1 |
44 | #define ACPI_BATTERY_STATE_CHARGING 0x2 | |
45 | #define ACPI_BATTERY_STATE_CRITICAL 0x4 | |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 48 | |
f52fd66d | 49 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 50 | |
f52fd66d | 51 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 52 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 53 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
54 | MODULE_LICENSE("GPL"); |
55 | ||
eca21d91 | 56 | static async_cookie_t async_cookie; |
bc39fbcf | 57 | static bool battery_driver_registered; |
a90b4038 | 58 | static int battery_bix_broken_package; |
f43691c6 | 59 | static int battery_notification_delay_ms; |
1b799c5c | 60 | static int battery_ac_is_broken; |
ec625a37 | 61 | static int battery_check_pmic = 1; |
f1d4661a AS |
62 | static unsigned int cache_time = 1000; |
63 | module_param(cache_time, uint, 0644); | |
64 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 65 | |
1ba90e3a TR |
66 | static const struct acpi_device_id battery_device_ids[] = { |
67 | {"PNP0C0A", 0}, | |
68 | {"", 0}, | |
69 | }; | |
1ba90e3a | 70 | |
aa650bbd | 71 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 72 | |
dccfae6d HG |
73 | /* Lists of PMIC ACPI HIDs with an (often better) native battery driver */ |
74 | static const char * const acpi_battery_blacklist[] = { | |
75 | "INT33F4", /* X-Powers AXP288 PMIC */ | |
76 | }; | |
77 | ||
7b3bcc4a AS |
78 | enum { |
79 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 80 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 81 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
82 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
83 | switches between mWh and mAh depending on whether the system | |
84 | is running on battery or not. When mAh is the unit, most | |
85 | reported values are incorrect and need to be adjusted by | |
86 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
87 | Pre-2010 and 2012 models appear to always report in mWh and | |
88 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
89 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
90 | the 2011 models that fixes the issue (tested on x220 with a | |
91 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
92 | available for the 2010 models. */ | |
93 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
a20136a6 LT |
94 | /* for batteries reporting current capacity with design capacity |
95 | * on a full charge, but showing degradation in full charge cap. | |
96 | */ | |
97 | ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, | |
7b3bcc4a | 98 | }; |
78490d82 | 99 | |
1da177e4 | 100 | struct acpi_battery { |
038fdea2 | 101 | struct mutex lock; |
69d94ec6 | 102 | struct mutex sysfs_lock; |
297d716f KK |
103 | struct power_supply *bat; |
104 | struct power_supply_desc bat_desc; | |
f1d4661a | 105 | struct acpi_device *device; |
25be5821 | 106 | struct notifier_block pm_nb; |
fa93854f | 107 | struct list_head list; |
f1d4661a | 108 | unsigned long update_time; |
016d5baa | 109 | int revision; |
7faa144a | 110 | int rate_now; |
d7380965 AS |
111 | int capacity_now; |
112 | int voltage_now; | |
038fdea2 | 113 | int design_capacity; |
d7380965 | 114 | int full_charge_capacity; |
038fdea2 AS |
115 | int technology; |
116 | int design_voltage; | |
117 | int design_capacity_warning; | |
118 | int design_capacity_low; | |
c67fcd67 AS |
119 | int cycle_count; |
120 | int measurement_accuracy; | |
121 | int max_sampling_time; | |
122 | int min_sampling_time; | |
123 | int max_averaging_interval; | |
124 | int min_averaging_interval; | |
038fdea2 AS |
125 | int capacity_granularity_1; |
126 | int capacity_granularity_2; | |
f1d4661a | 127 | int alarm; |
038fdea2 AS |
128 | char model_number[32]; |
129 | char serial_number[32]; | |
130 | char type[32]; | |
131 | char oem_info[32]; | |
f1d4661a AS |
132 | int state; |
133 | int power_unit; | |
7b3bcc4a | 134 | unsigned long flags; |
1da177e4 LT |
135 | }; |
136 | ||
297d716f | 137 | #define to_acpi_battery(x) power_supply_get_drvdata(x) |
d7380965 | 138 | |
efd941f1 | 139 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 140 | { |
78490d82 AS |
141 | return battery->device->status.battery_present; |
142 | } | |
038fdea2 | 143 | |
d7380965 AS |
144 | static int acpi_battery_technology(struct acpi_battery *battery) |
145 | { | |
146 | if (!strcasecmp("NiCd", battery->type)) | |
147 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
148 | if (!strcasecmp("NiMH", battery->type)) | |
149 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
150 | if (!strcasecmp("LION", battery->type)) | |
151 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 152 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 153 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
154 | if (!strcasecmp("LiP", battery->type)) |
155 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
156 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
157 | } | |
158 | ||
9104476e | 159 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 160 | |
56f382a0 RH |
161 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
162 | { | |
1ac5aaa6 | 163 | /* charging, discharging or critical low */ |
56f382a0 RH |
164 | if (battery->state != 0) |
165 | return 0; | |
166 | ||
167 | /* battery not reporting charge */ | |
168 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
169 | battery->capacity_now == 0) | |
170 | return 0; | |
171 | ||
172 | /* good batteries update full_charge as the batteries degrade */ | |
173 | if (battery->full_charge_capacity == battery->capacity_now) | |
174 | return 1; | |
175 | ||
176 | /* fallback to using design values for broken batteries */ | |
177 | if (battery->design_capacity == battery->capacity_now) | |
178 | return 1; | |
179 | ||
180 | /* we don't do any sort of metric based on percentages */ | |
181 | return 0; | |
182 | } | |
183 | ||
a20136a6 LT |
184 | static bool acpi_battery_is_degraded(struct acpi_battery *battery) |
185 | { | |
cc99f0ad HG |
186 | return ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) && |
187 | ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity) && | |
a20136a6 LT |
188 | battery->full_charge_capacity < battery->design_capacity; |
189 | } | |
190 | ||
19fffc84 HG |
191 | static int acpi_battery_handle_discharging(struct acpi_battery *battery) |
192 | { | |
193 | /* | |
194 | * Some devices wrongly report discharging if the battery's charge level | |
195 | * was above the device's start charging threshold atm the AC adapter | |
196 | * was plugged in and the device thus did not start a new charge cycle. | |
197 | */ | |
1b799c5c HG |
198 | if ((battery_ac_is_broken || power_supply_is_system_supplied()) && |
199 | battery->rate_now == 0) | |
19fffc84 HG |
200 | return POWER_SUPPLY_STATUS_NOT_CHARGING; |
201 | ||
202 | return POWER_SUPPLY_STATUS_DISCHARGING; | |
203 | } | |
204 | ||
d7380965 AS |
205 | static int acpi_battery_get_property(struct power_supply *psy, |
206 | enum power_supply_property psp, | |
207 | union power_supply_propval *val) | |
208 | { | |
5b74d1d1 | 209 | int full_capacity = ACPI_BATTERY_VALUE_UNKNOWN, ret = 0; |
d7380965 AS |
210 | struct acpi_battery *battery = to_acpi_battery(psy); |
211 | ||
9104476e AS |
212 | if (acpi_battery_present(battery)) { |
213 | /* run battery update only if it is present */ | |
214 | acpi_battery_get_state(battery); | |
215 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
216 | return -ENODEV; |
217 | switch (psp) { | |
218 | case POWER_SUPPLY_PROP_STATUS: | |
82bf43b2 | 219 | if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) |
19fffc84 | 220 | val->intval = acpi_battery_handle_discharging(battery); |
82bf43b2 | 221 | else if (battery->state & ACPI_BATTERY_STATE_CHARGING) |
d7380965 | 222 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
56f382a0 | 223 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 224 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
225 | else |
226 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
227 | break; |
228 | case POWER_SUPPLY_PROP_PRESENT: | |
229 | val->intval = acpi_battery_present(battery); | |
230 | break; | |
231 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
232 | val->intval = acpi_battery_technology(battery); | |
233 | break; | |
c67fcd67 AS |
234 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
235 | val->intval = battery->cycle_count; | |
236 | break; | |
d7380965 | 237 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
238 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
239 | ret = -ENODEV; | |
240 | else | |
241 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
242 | break; |
243 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
244 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
245 | ret = -ENODEV; | |
246 | else | |
247 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
248 | break; |
249 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 250 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
251 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
252 | ret = -ENODEV; | |
253 | else | |
254 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
255 | break; |
256 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
257 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
cc99f0ad | 258 | if (!ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) |
a1b4bd69 RW |
259 | ret = -ENODEV; |
260 | else | |
261 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
262 | break; |
263 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
264 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
cc99f0ad | 265 | if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity)) |
a1b4bd69 RW |
266 | ret = -ENODEV; |
267 | else | |
268 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
269 | break; |
270 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
271 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
272 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
273 | ret = -ENODEV; | |
274 | else | |
275 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 276 | break; |
a58e1150 | 277 | case POWER_SUPPLY_PROP_CAPACITY: |
5b74d1d1 HG |
278 | if (ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity)) |
279 | full_capacity = battery->full_charge_capacity; | |
280 | else if (ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) | |
281 | full_capacity = battery->design_capacity; | |
282 | ||
cc99f0ad | 283 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || |
5b74d1d1 | 284 | full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
cc99f0ad HG |
285 | ret = -ENODEV; |
286 | else | |
a58e1150 | 287 | val->intval = battery->capacity_now * 100/ |
5b74d1d1 | 288 | full_capacity; |
a58e1150 | 289 | break; |
1ac5aaa6 ZR |
290 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
291 | if (battery->state & ACPI_BATTERY_STATE_CRITICAL) | |
292 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
293 | else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
294 | (battery->capacity_now <= battery->alarm)) | |
295 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
296 | else if (acpi_battery_is_charged(battery)) | |
297 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
298 | else | |
299 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
300 | break; | |
d7380965 AS |
301 | case POWER_SUPPLY_PROP_MODEL_NAME: |
302 | val->strval = battery->model_number; | |
303 | break; | |
304 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
305 | val->strval = battery->oem_info; | |
306 | break; | |
7c2670bb | 307 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
308 | val->strval = battery->serial_number; | |
309 | break; | |
d7380965 | 310 | default: |
a1b4bd69 | 311 | ret = -EINVAL; |
d7380965 | 312 | } |
a1b4bd69 | 313 | return ret; |
d7380965 AS |
314 | } |
315 | ||
316 | static enum power_supply_property charge_battery_props[] = { | |
317 | POWER_SUPPLY_PROP_STATUS, | |
318 | POWER_SUPPLY_PROP_PRESENT, | |
319 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 320 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
321 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
322 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
323 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
324 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
325 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
326 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 327 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 328 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
329 | POWER_SUPPLY_PROP_MODEL_NAME, |
330 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 331 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
332 | }; |
333 | ||
ff3154d1 HG |
334 | static enum power_supply_property charge_battery_full_cap_broken_props[] = { |
335 | POWER_SUPPLY_PROP_STATUS, | |
336 | POWER_SUPPLY_PROP_PRESENT, | |
337 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
338 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
339 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
340 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
341 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
342 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
343 | POWER_SUPPLY_PROP_MODEL_NAME, | |
344 | POWER_SUPPLY_PROP_MANUFACTURER, | |
345 | POWER_SUPPLY_PROP_SERIAL_NUMBER, | |
346 | }; | |
347 | ||
d7380965 AS |
348 | static enum power_supply_property energy_battery_props[] = { |
349 | POWER_SUPPLY_PROP_STATUS, | |
350 | POWER_SUPPLY_PROP_PRESENT, | |
351 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 352 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
353 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
354 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 355 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
356 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
357 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
358 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 359 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 360 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
361 | POWER_SUPPLY_PROP_MODEL_NAME, |
362 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 363 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
364 | }; |
365 | ||
b41901a2 HG |
366 | static enum power_supply_property energy_battery_full_cap_broken_props[] = { |
367 | POWER_SUPPLY_PROP_STATUS, | |
368 | POWER_SUPPLY_PROP_PRESENT, | |
369 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
370 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
371 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
372 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
373 | POWER_SUPPLY_PROP_POWER_NOW, | |
374 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
375 | POWER_SUPPLY_PROP_MODEL_NAME, | |
376 | POWER_SUPPLY_PROP_MANUFACTURER, | |
377 | POWER_SUPPLY_PROP_SERIAL_NUMBER, | |
378 | }; | |
379 | ||
78490d82 AS |
380 | /* -------------------------------------------------------------------------- |
381 | Battery Management | |
382 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
383 | struct acpi_offsets { |
384 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
385 | u8 mode; /* int or string? */ | |
386 | }; | |
b6ce4083 | 387 | |
a4658784 | 388 | static const struct acpi_offsets state_offsets[] = { |
038fdea2 | 389 | {offsetof(struct acpi_battery, state), 0}, |
7faa144a | 390 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
391 | {offsetof(struct acpi_battery, capacity_now), 0}, |
392 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 393 | }; |
b6ce4083 | 394 | |
a4658784 | 395 | static const struct acpi_offsets info_offsets[] = { |
038fdea2 AS |
396 | {offsetof(struct acpi_battery, power_unit), 0}, |
397 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 398 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
399 | {offsetof(struct acpi_battery, technology), 0}, |
400 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
401 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
402 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
403 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
404 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
405 | {offsetof(struct acpi_battery, model_number), 1}, | |
406 | {offsetof(struct acpi_battery, serial_number), 1}, | |
407 | {offsetof(struct acpi_battery, type), 1}, | |
408 | {offsetof(struct acpi_battery, oem_info), 1}, | |
409 | }; | |
b6ce4083 | 410 | |
a4658784 | 411 | static const struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 412 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
413 | {offsetof(struct acpi_battery, power_unit), 0}, |
414 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
415 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
416 | {offsetof(struct acpi_battery, technology), 0}, | |
417 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
418 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
419 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
420 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
421 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
422 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
423 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
424 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
425 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
426 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
427 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
428 | {offsetof(struct acpi_battery, model_number), 1}, | |
429 | {offsetof(struct acpi_battery, serial_number), 1}, | |
430 | {offsetof(struct acpi_battery, type), 1}, | |
431 | {offsetof(struct acpi_battery, oem_info), 1}, | |
432 | }; | |
433 | ||
038fdea2 AS |
434 | static int extract_package(struct acpi_battery *battery, |
435 | union acpi_object *package, | |
a4658784 | 436 | const struct acpi_offsets *offsets, int num) |
038fdea2 | 437 | { |
106449e8 | 438 | int i; |
038fdea2 AS |
439 | union acpi_object *element; |
440 | if (package->type != ACPI_TYPE_PACKAGE) | |
441 | return -EFAULT; | |
442 | for (i = 0; i < num; ++i) { | |
443 | if (package->package.count <= i) | |
444 | return -EFAULT; | |
445 | element = &package->package.elements[i]; | |
446 | if (offsets[i].mode) { | |
106449e8 AS |
447 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
448 | if (element->type == ACPI_TYPE_STRING || | |
449 | element->type == ACPI_TYPE_BUFFER) | |
450 | strncpy(ptr, element->string.pointer, 32); | |
451 | else if (element->type == ACPI_TYPE_INTEGER) { | |
452 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
453 | sizeof(u64)); |
454 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
455 | } else |
456 | *ptr = 0; /* don't have value */ | |
038fdea2 | 457 | } else { |
b8a1bdb1 AS |
458 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
459 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
460 | element->integer.value : -1; | |
038fdea2 | 461 | } |
b6ce4083 | 462 | } |
b6ce4083 VL |
463 | return 0; |
464 | } | |
465 | ||
466 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
467 | { | |
aa650bbd | 468 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
469 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
470 | return -ENODEV; | |
471 | } | |
aa650bbd | 472 | return 0; |
b6ce4083 VL |
473 | } |
474 | ||
2d09af4a DL |
475 | |
476 | static int extract_battery_info(const int use_bix, | |
477 | struct acpi_battery *battery, | |
478 | const struct acpi_buffer *buffer) | |
1da177e4 | 479 | { |
aa650bbd | 480 | int result = -EFAULT; |
1da177e4 | 481 | |
2d09af4a DL |
482 | if (use_bix && battery_bix_broken_package) |
483 | result = extract_package(battery, buffer->pointer, | |
a90b4038 LT |
484 | extended_info_offsets + 1, |
485 | ARRAY_SIZE(extended_info_offsets) - 1); | |
2d09af4a DL |
486 | else if (use_bix) |
487 | result = extract_package(battery, buffer->pointer, | |
c67fcd67 AS |
488 | extended_info_offsets, |
489 | ARRAY_SIZE(extended_info_offsets)); | |
490 | else | |
2d09af4a | 491 | result = extract_package(battery, buffer->pointer, |
c67fcd67 | 492 | info_offsets, ARRAY_SIZE(info_offsets)); |
557d5868 ZR |
493 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
494 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
495 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
496 | battery->power_unit && battery->design_voltage) { | |
497 | battery->design_capacity = battery->design_capacity * | |
498 | 10000 / battery->design_voltage; | |
499 | battery->full_charge_capacity = battery->full_charge_capacity * | |
500 | 10000 / battery->design_voltage; | |
501 | battery->design_capacity_warning = | |
502 | battery->design_capacity_warning * | |
503 | 10000 / battery->design_voltage; | |
504 | /* Curiously, design_capacity_low, unlike the rest of them, | |
505 | is correct. */ | |
506 | /* capacity_granularity_* equal 1 on the systems tested, so | |
507 | it's impossible to tell if they would need an adjustment | |
508 | or not if their values were higher. */ | |
509 | } | |
a20136a6 LT |
510 | if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) && |
511 | battery->capacity_now > battery->full_charge_capacity) | |
512 | battery->capacity_now = battery->full_charge_capacity; | |
513 | ||
d550d98d | 514 | return result; |
1da177e4 LT |
515 | } |
516 | ||
2d09af4a DL |
517 | static int acpi_battery_get_info(struct acpi_battery *battery) |
518 | { | |
519 | const int xinfo = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); | |
520 | int use_bix; | |
521 | int result = -ENODEV; | |
522 | ||
523 | if (!acpi_battery_present(battery)) | |
524 | return 0; | |
525 | ||
526 | ||
527 | for (use_bix = xinfo ? 1 : 0; use_bix >= 0; use_bix--) { | |
528 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
529 | acpi_status status = AE_ERROR; | |
530 | ||
531 | mutex_lock(&battery->lock); | |
532 | status = acpi_evaluate_object(battery->device->handle, | |
533 | use_bix ? "_BIX":"_BIF", | |
534 | NULL, &buffer); | |
535 | mutex_unlock(&battery->lock); | |
536 | ||
537 | if (ACPI_FAILURE(status)) { | |
538 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", | |
539 | use_bix ? "_BIX":"_BIF")); | |
540 | } else { | |
541 | result = extract_battery_info(use_bix, | |
542 | battery, | |
543 | &buffer); | |
544 | ||
545 | kfree(buffer.pointer); | |
546 | break; | |
547 | } | |
548 | } | |
549 | ||
550 | if (!result && !use_bix && xinfo) | |
551 | pr_warn(FW_BUG "The _BIX method is broken, using _BIF.\n"); | |
552 | ||
553 | return result; | |
554 | } | |
555 | ||
b6ce4083 | 556 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 557 | { |
4be44fcd LB |
558 | int result = 0; |
559 | acpi_status status = 0; | |
560 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 561 | |
b6ce4083 VL |
562 | if (!acpi_battery_present(battery)) |
563 | return 0; | |
1da177e4 | 564 | |
f1d4661a AS |
565 | if (battery->update_time && |
566 | time_before(jiffies, battery->update_time + | |
567 | msecs_to_jiffies(cache_time))) | |
568 | return 0; | |
569 | ||
038fdea2 | 570 | mutex_lock(&battery->lock); |
f1d4661a | 571 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
572 | NULL, &buffer); |
573 | mutex_unlock(&battery->lock); | |
5b31d895 | 574 | |
1da177e4 | 575 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 576 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 577 | return -ENODEV; |
1da177e4 | 578 | } |
aa650bbd | 579 | |
038fdea2 AS |
580 | result = extract_package(battery, buffer.pointer, |
581 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 582 | battery->update_time = jiffies; |
78490d82 | 583 | kfree(buffer.pointer); |
bc76f90b | 584 | |
55003b21 LT |
585 | /* For buggy DSDTs that report negative 16-bit values for either |
586 | * charging or discharging current and/or report 0 as 65536 | |
587 | * due to bad math. | |
588 | */ | |
589 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
590 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
591 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 592 | battery->rate_now = abs((s16)battery->rate_now); |
dd1fca9e | 593 | pr_warn_once(FW_BUG "battery: (dis)charge rate invalid.\n"); |
55003b21 | 594 | } |
bc76f90b | 595 | |
557d5868 ZR |
596 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
597 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
598 | battery->capacity_now = (battery->capacity_now * | |
599 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
600 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
601 | battery->power_unit && battery->design_voltage) { | |
602 | battery->capacity_now = battery->capacity_now * | |
603 | 10000 / battery->design_voltage; | |
604 | } | |
a20136a6 LT |
605 | if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) && |
606 | battery->capacity_now > battery->full_charge_capacity) | |
607 | battery->capacity_now = battery->full_charge_capacity; | |
608 | ||
b6ce4083 VL |
609 | return result; |
610 | } | |
1da177e4 | 611 | |
aa650bbd | 612 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 613 | { |
4be44fcd | 614 | acpi_status status = 0; |
1da177e4 | 615 | |
c67fcd67 | 616 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 617 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 618 | return -ENODEV; |
1da177e4 | 619 | |
038fdea2 | 620 | mutex_lock(&battery->lock); |
0db98202 JL |
621 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
622 | battery->alarm); | |
038fdea2 | 623 | mutex_unlock(&battery->lock); |
aa650bbd | 624 | |
1da177e4 | 625 | if (ACPI_FAILURE(status)) |
d550d98d | 626 | return -ENODEV; |
1da177e4 | 627 | |
aa650bbd | 628 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 629 | return 0; |
1da177e4 LT |
630 | } |
631 | ||
b6ce4083 | 632 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 633 | { |
b6ce4083 | 634 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 635 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 636 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 637 | return 0; |
b6ce4083 | 638 | } |
7b3bcc4a | 639 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
640 | if (!battery->alarm) |
641 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 642 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 643 | } |
1da177e4 | 644 | |
508df92d AB |
645 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
646 | struct device_attribute *attr, | |
647 | char *buf) | |
648 | { | |
649 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
650 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
651 | } | |
652 | ||
653 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
654 | struct device_attribute *attr, | |
655 | const char *buf, size_t count) | |
656 | { | |
657 | unsigned long x; | |
658 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 659 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
660 | battery->alarm = x/1000; |
661 | if (acpi_battery_present(battery)) | |
662 | acpi_battery_set_alarm(battery); | |
663 | return count; | |
664 | } | |
665 | ||
82d2b610 | 666 | static const struct device_attribute alarm_attr = { |
01e8ef11 | 667 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
668 | .show = acpi_battery_alarm_show, |
669 | .store = acpi_battery_alarm_store, | |
670 | }; | |
671 | ||
fa93854f OG |
672 | /* |
673 | * The Battery Hooking API | |
674 | * | |
675 | * This API is used inside other drivers that need to expose | |
676 | * platform-specific behaviour within the generic driver in a | |
677 | * generic way. | |
678 | * | |
679 | */ | |
680 | ||
681 | static LIST_HEAD(acpi_battery_list); | |
682 | static LIST_HEAD(battery_hook_list); | |
683 | static DEFINE_MUTEX(hook_mutex); | |
684 | ||
514bcc5d | 685 | static void __battery_hook_unregister(struct acpi_battery_hook *hook, int lock) |
fa93854f OG |
686 | { |
687 | struct acpi_battery *battery; | |
688 | /* | |
689 | * In order to remove a hook, we first need to | |
690 | * de-register all the batteries that are registered. | |
691 | */ | |
692 | if (lock) | |
693 | mutex_lock(&hook_mutex); | |
694 | list_for_each_entry(battery, &acpi_battery_list, list) { | |
695 | hook->remove_battery(battery->bat); | |
696 | } | |
697 | list_del(&hook->list); | |
698 | if (lock) | |
699 | mutex_unlock(&hook_mutex); | |
700 | pr_info("extension unregistered: %s\n", hook->name); | |
701 | } | |
702 | ||
703 | void battery_hook_unregister(struct acpi_battery_hook *hook) | |
704 | { | |
705 | __battery_hook_unregister(hook, 1); | |
706 | } | |
707 | EXPORT_SYMBOL_GPL(battery_hook_unregister); | |
708 | ||
709 | void battery_hook_register(struct acpi_battery_hook *hook) | |
710 | { | |
711 | struct acpi_battery *battery; | |
712 | ||
713 | mutex_lock(&hook_mutex); | |
714 | INIT_LIST_HEAD(&hook->list); | |
715 | list_add(&hook->list, &battery_hook_list); | |
716 | /* | |
717 | * Now that the driver is registered, we need | |
718 | * to notify the hook that a battery is available | |
719 | * for each battery, so that the driver may add | |
720 | * its attributes. | |
721 | */ | |
722 | list_for_each_entry(battery, &acpi_battery_list, list) { | |
723 | if (hook->add_battery(battery->bat)) { | |
724 | /* | |
725 | * If a add-battery returns non-zero, | |
726 | * the registration of the extension has failed, | |
727 | * and we will not add it to the list of loaded | |
728 | * hooks. | |
729 | */ | |
730 | pr_err("extension failed to load: %s", hook->name); | |
731 | __battery_hook_unregister(hook, 0); | |
673b4271 | 732 | goto end; |
fa93854f OG |
733 | } |
734 | } | |
735 | pr_info("new extension: %s\n", hook->name); | |
673b4271 | 736 | end: |
fa93854f OG |
737 | mutex_unlock(&hook_mutex); |
738 | } | |
739 | EXPORT_SYMBOL_GPL(battery_hook_register); | |
740 | ||
741 | /* | |
742 | * This function gets called right after the battery sysfs | |
743 | * attributes have been added, so that the drivers that | |
744 | * define custom sysfs attributes can add their own. | |
7a4ea10c | 745 | */ |
fa93854f OG |
746 | static void battery_hook_add_battery(struct acpi_battery *battery) |
747 | { | |
673b4271 | 748 | struct acpi_battery_hook *hook_node, *tmp; |
fa93854f OG |
749 | |
750 | mutex_lock(&hook_mutex); | |
751 | INIT_LIST_HEAD(&battery->list); | |
752 | list_add(&battery->list, &acpi_battery_list); | |
753 | /* | |
754 | * Since we added a new battery to the list, we need to | |
755 | * iterate over the hooks and call add_battery for each | |
756 | * hook that was registered. This usually happens | |
757 | * when a battery gets hotplugged or initialized | |
758 | * during the battery module initialization. | |
759 | */ | |
673b4271 | 760 | list_for_each_entry_safe(hook_node, tmp, &battery_hook_list, list) { |
fa93854f OG |
761 | if (hook_node->add_battery(battery->bat)) { |
762 | /* | |
763 | * The notification of the extensions has failed, to | |
764 | * prevent further errors we will unload the extension. | |
765 | */ | |
fa93854f OG |
766 | pr_err("error in extension, unloading: %s", |
767 | hook_node->name); | |
673b4271 | 768 | __battery_hook_unregister(hook_node, 0); |
fa93854f OG |
769 | } |
770 | } | |
771 | mutex_unlock(&hook_mutex); | |
772 | } | |
773 | ||
774 | static void battery_hook_remove_battery(struct acpi_battery *battery) | |
775 | { | |
776 | struct acpi_battery_hook *hook; | |
777 | ||
778 | mutex_lock(&hook_mutex); | |
779 | /* | |
780 | * Before removing the hook, we need to remove all | |
781 | * custom attributes from the battery. | |
782 | */ | |
783 | list_for_each_entry(hook, &battery_hook_list, list) { | |
784 | hook->remove_battery(battery->bat); | |
785 | } | |
786 | /* Then, just remove the battery from the list */ | |
787 | list_del(&battery->list); | |
788 | mutex_unlock(&hook_mutex); | |
789 | } | |
790 | ||
791 | static void __exit battery_hook_exit(void) | |
792 | { | |
793 | struct acpi_battery_hook *hook; | |
794 | struct acpi_battery_hook *ptr; | |
795 | /* | |
796 | * At this point, the acpi_bus_unregister_driver() | |
797 | * has called remove for all batteries. We just | |
798 | * need to remove the hooks. | |
799 | */ | |
800 | list_for_each_entry_safe(hook, ptr, &battery_hook_list, list) { | |
801 | __battery_hook_unregister(hook, 1); | |
802 | } | |
803 | mutex_destroy(&hook_mutex); | |
804 | } | |
805 | ||
508df92d AB |
806 | static int sysfs_add_battery(struct acpi_battery *battery) |
807 | { | |
297d716f | 808 | struct power_supply_config psy_cfg = { .drv_data = battery, }; |
ff3154d1 HG |
809 | bool full_cap_broken = false; |
810 | ||
811 | if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) && | |
812 | !ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) | |
813 | full_cap_broken = true; | |
508df92d | 814 | |
ae6f6187 | 815 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
ff3154d1 HG |
816 | if (full_cap_broken) { |
817 | battery->bat_desc.properties = | |
818 | charge_battery_full_cap_broken_props; | |
819 | battery->bat_desc.num_properties = | |
820 | ARRAY_SIZE(charge_battery_full_cap_broken_props); | |
821 | } else { | |
822 | battery->bat_desc.properties = charge_battery_props; | |
823 | battery->bat_desc.num_properties = | |
824 | ARRAY_SIZE(charge_battery_props); | |
825 | } | |
508df92d | 826 | } else { |
ff3154d1 HG |
827 | if (full_cap_broken) { |
828 | battery->bat_desc.properties = | |
829 | energy_battery_full_cap_broken_props; | |
830 | battery->bat_desc.num_properties = | |
831 | ARRAY_SIZE(energy_battery_full_cap_broken_props); | |
832 | } else { | |
833 | battery->bat_desc.properties = energy_battery_props; | |
834 | battery->bat_desc.num_properties = | |
835 | ARRAY_SIZE(energy_battery_props); | |
836 | } | |
508df92d AB |
837 | } |
838 | ||
297d716f KK |
839 | battery->bat_desc.name = acpi_device_bid(battery->device); |
840 | battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; | |
841 | battery->bat_desc.get_property = acpi_battery_get_property; | |
508df92d | 842 | |
297d716f KK |
843 | battery->bat = power_supply_register_no_ws(&battery->device->dev, |
844 | &battery->bat_desc, &psy_cfg); | |
e0d1f09e | 845 | |
297d716f KK |
846 | if (IS_ERR(battery->bat)) { |
847 | int result = PTR_ERR(battery->bat); | |
848 | ||
849 | battery->bat = NULL; | |
508df92d | 850 | return result; |
297d716f | 851 | } |
fa93854f | 852 | battery_hook_add_battery(battery); |
297d716f | 853 | return device_create_file(&battery->bat->dev, &alarm_attr); |
508df92d AB |
854 | } |
855 | ||
856 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
857 | { | |
69d94ec6 | 858 | mutex_lock(&battery->sysfs_lock); |
297d716f | 859 | if (!battery->bat) { |
69d94ec6 | 860 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 861 | return; |
9c921c22 | 862 | } |
fa93854f | 863 | battery_hook_remove_battery(battery); |
297d716f KK |
864 | device_remove_file(&battery->bat->dev, &alarm_attr); |
865 | power_supply_unregister(battery->bat); | |
866 | battery->bat = NULL; | |
69d94ec6 | 867 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
868 | } |
869 | ||
4000e626 KI |
870 | static void find_battery(const struct dmi_header *dm, void *private) |
871 | { | |
872 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
873 | /* Note: the hardcoded offsets below have been extracted from | |
874 | the source code of dmidecode. */ | |
875 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
876 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
877 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
878 | if (dm->length >= 18) | |
879 | dmi_capacity *= dmi_data[17]; | |
880 | if (battery->design_capacity * battery->design_voltage / 1000 | |
881 | != dmi_capacity && | |
882 | battery->design_capacity * 10 == dmi_capacity) | |
883 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
884 | &battery->flags); | |
885 | } | |
886 | } | |
887 | ||
557d5868 ZR |
888 | /* |
889 | * According to the ACPI spec, some kinds of primary batteries can | |
890 | * report percentage battery remaining capacity directly to OS. | |
891 | * In this case, it reports the Last Full Charged Capacity == 100 | |
892 | * and BatteryPresentRate == 0xFFFFFFFF. | |
893 | * | |
894 | * Now we found some battery reports percentage remaining capacity | |
895 | * even if it's rechargeable. | |
896 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
897 | * | |
898 | * Handle this correctly so that they won't break userspace. | |
899 | */ | |
7b78622d | 900 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
901 | { |
902 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 903 | return; |
557d5868 | 904 | |
0f4c6547 NM |
905 | if (battery->full_charge_capacity == 100 && |
906 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
907 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
908 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
909 | battery->full_charge_capacity = battery->design_capacity; | |
910 | battery->capacity_now = (battery->capacity_now * | |
911 | battery->full_charge_capacity) / 100; | |
912 | } | |
4000e626 KI |
913 | |
914 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 915 | return; |
4000e626 KI |
916 | |
917 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
918 | const char *s; | |
919 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
ffd8a731 | 920 | if (s && !strncasecmp(s, "ThinkPad", 8)) { |
4000e626 KI |
921 | dmi_walk(find_battery, battery); |
922 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
923 | &battery->flags) && | |
924 | battery->design_voltage) { | |
925 | battery->design_capacity = | |
926 | battery->design_capacity * | |
927 | 10000 / battery->design_voltage; | |
928 | battery->full_charge_capacity = | |
929 | battery->full_charge_capacity * | |
930 | 10000 / battery->design_voltage; | |
931 | battery->design_capacity_warning = | |
932 | battery->design_capacity_warning * | |
933 | 10000 / battery->design_voltage; | |
934 | battery->capacity_now = battery->capacity_now * | |
935 | 10000 / battery->design_voltage; | |
936 | } | |
937 | } | |
938 | } | |
a20136a6 LT |
939 | |
940 | if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags)) | |
941 | return; | |
942 | ||
943 | if (acpi_battery_is_degraded(battery) && | |
944 | battery->capacity_now > battery->full_charge_capacity) { | |
945 | set_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags); | |
946 | battery->capacity_now = battery->full_charge_capacity; | |
947 | } | |
557d5868 ZR |
948 | } |
949 | ||
9e50bc14 | 950 | static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
b6ce4083 | 951 | { |
82f2d305 LRM |
952 | int result = acpi_battery_get_status(battery); |
953 | ||
508df92d | 954 | if (result) |
b6ce4083 | 955 | return result; |
82f2d305 | 956 | |
508df92d AB |
957 | if (!acpi_battery_present(battery)) { |
958 | sysfs_remove_battery(battery); | |
97749cd9 | 959 | battery->update_time = 0; |
508df92d | 960 | return 0; |
b6ce4083 | 961 | } |
9e50bc14 LT |
962 | |
963 | if (resume) | |
964 | return 0; | |
965 | ||
82f2d305 | 966 | if (!battery->update_time) { |
97749cd9 AS |
967 | result = acpi_battery_get_info(battery); |
968 | if (result) | |
969 | return result; | |
970 | acpi_battery_init_alarm(battery); | |
971 | } | |
12c78ca2 CG |
972 | |
973 | result = acpi_battery_get_state(battery); | |
974 | if (result) | |
975 | return result; | |
976 | acpi_battery_quirks(battery); | |
977 | ||
297d716f | 978 | if (!battery->bat) { |
eb03cb02 SH |
979 | result = sysfs_add_battery(battery); |
980 | if (result) | |
981 | return result; | |
982 | } | |
e0d1f09e ZR |
983 | |
984 | /* | |
985 | * Wakeup the system if battery is critical low | |
986 | * or lower than the alarm level | |
987 | */ | |
988 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
989 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
c6237b21 | 990 | (battery->capacity_now <= battery->alarm))) |
33e4f80e | 991 | acpi_pm_wakeup_event(&battery->device->dev); |
e0d1f09e | 992 | |
557d5868 | 993 | return result; |
4bd35cdb VL |
994 | } |
995 | ||
da8aeb92 RW |
996 | static void acpi_battery_refresh(struct acpi_battery *battery) |
997 | { | |
c5971456 AW |
998 | int power_unit; |
999 | ||
297d716f | 1000 | if (!battery->bat) |
da8aeb92 RW |
1001 | return; |
1002 | ||
c5971456 AW |
1003 | power_unit = battery->power_unit; |
1004 | ||
da8aeb92 | 1005 | acpi_battery_get_info(battery); |
c5971456 AW |
1006 | |
1007 | if (power_unit == battery->power_unit) | |
1008 | return; | |
1009 | ||
1010 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
1011 | sysfs_remove_battery(battery); |
1012 | sysfs_add_battery(battery); | |
1013 | } | |
1014 | ||
1da177e4 LT |
1015 | /* -------------------------------------------------------------------------- |
1016 | Driver Interface | |
1017 | -------------------------------------------------------------------------- */ | |
1018 | ||
d9406691 | 1019 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1020 | { |
d9406691 | 1021 | struct acpi_battery *battery = acpi_driver_data(device); |
297d716f | 1022 | struct power_supply *old; |
d9406691 | 1023 | |
1da177e4 | 1024 | if (!battery) |
d550d98d | 1025 | return; |
297d716f | 1026 | old = battery->bat; |
f43691c6 AM |
1027 | /* |
1028 | * On Acer Aspire V5-573G notifications are sometimes triggered too | |
1029 | * early. For example, when AC is unplugged and notification is | |
1030 | * triggered, battery state is still reported as "Full", and changes to | |
1031 | * "Discharging" only after short delay, without any notification. | |
1032 | */ | |
1033 | if (battery_notification_delay_ms > 0) | |
1034 | msleep(battery_notification_delay_ms); | |
da8aeb92 RW |
1035 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1036 | acpi_battery_refresh(battery); | |
9e50bc14 | 1037 | acpi_battery_update(battery, false); |
f1d4661a | 1038 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1039 | dev_name(&device->dev), event, |
9ea7d575 | 1040 | acpi_battery_present(battery)); |
411e0f77 | 1041 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1042 | /* acpi_battery_update could remove power_supply object */ |
297d716f KK |
1043 | if (old && battery->bat) |
1044 | power_supply_changed(battery->bat); | |
1da177e4 LT |
1045 | } |
1046 | ||
25be5821 KM |
1047 | static int battery_notify(struct notifier_block *nb, |
1048 | unsigned long mode, void *_unused) | |
1049 | { | |
1050 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1051 | pm_nb); | |
9e50bc14 LT |
1052 | int result; |
1053 | ||
25be5821 | 1054 | switch (mode) { |
d5a5911b | 1055 | case PM_POST_HIBERNATION: |
25be5821 | 1056 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1057 | if (!acpi_battery_present(battery)) |
1058 | return 0; | |
1059 | ||
2754435d DR |
1060 | if (battery->bat) { |
1061 | acpi_battery_refresh(battery); | |
1062 | } else { | |
9e50bc14 LT |
1063 | result = acpi_battery_get_info(battery); |
1064 | if (result) | |
1065 | return result; | |
1066 | ||
1067 | result = sysfs_add_battery(battery); | |
1068 | if (result) | |
1069 | return result; | |
2754435d | 1070 | } |
9e50bc14 LT |
1071 | |
1072 | acpi_battery_init_alarm(battery); | |
1073 | acpi_battery_get_state(battery); | |
25be5821 KM |
1074 | break; |
1075 | } | |
1076 | ||
1077 | return 0; | |
1078 | } | |
1079 | ||
048d16da MK |
1080 | static int __init |
1081 | battery_bix_broken_package_quirk(const struct dmi_system_id *d) | |
3f5dc08f AM |
1082 | { |
1083 | battery_bix_broken_package = 1; | |
1084 | return 0; | |
1085 | } | |
1086 | ||
048d16da MK |
1087 | static int __init |
1088 | battery_notification_delay_quirk(const struct dmi_system_id *d) | |
f43691c6 AM |
1089 | { |
1090 | battery_notification_delay_ms = 1000; | |
1091 | return 0; | |
1092 | } | |
1093 | ||
1b799c5c HG |
1094 | static int __init |
1095 | battery_ac_is_broken_quirk(const struct dmi_system_id *d) | |
1096 | { | |
1097 | battery_ac_is_broken = 1; | |
1098 | return 0; | |
1099 | } | |
1100 | ||
ec625a37 CC |
1101 | static int __init |
1102 | battery_do_not_check_pmic_quirk(const struct dmi_system_id *d) | |
1103 | { | |
1104 | battery_check_pmic = 0; | |
1105 | return 0; | |
1106 | } | |
1107 | ||
048d16da | 1108 | static const struct dmi_system_id bat_dmi_table[] __initconst = { |
a90b4038 | 1109 | { |
91afa076 | 1110 | /* NEC LZ750/LS */ |
3f5dc08f | 1111 | .callback = battery_bix_broken_package_quirk, |
a90b4038 LT |
1112 | .matches = { |
1113 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1114 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1115 | }, | |
1116 | }, | |
f43691c6 | 1117 | { |
91afa076 | 1118 | /* Acer Aspire V5-573G */ |
f43691c6 | 1119 | .callback = battery_notification_delay_quirk, |
f43691c6 AM |
1120 | .matches = { |
1121 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1122 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), | |
1123 | }, | |
1124 | }, | |
1b799c5c HG |
1125 | { |
1126 | /* Point of View mobii wintab p800w */ | |
1127 | .callback = battery_ac_is_broken_quirk, | |
1128 | .matches = { | |
1129 | DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), | |
1130 | DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), | |
1131 | DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"), | |
1132 | /* Above matches are too generic, add bios-date match */ | |
1133 | DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"), | |
1134 | }, | |
1135 | }, | |
ec625a37 | 1136 | { |
8c3f6993 | 1137 | /* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */ |
ec625a37 CC |
1138 | .callback = battery_do_not_check_pmic_quirk, |
1139 | .matches = { | |
1140 | DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"), | |
1141 | }, | |
1142 | }, | |
1143 | { | |
8c3f6993 | 1144 | /* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */ |
ec625a37 CC |
1145 | .callback = battery_do_not_check_pmic_quirk, |
1146 | .matches = { | |
8c3f6993 HG |
1147 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
1148 | DMI_MATCH(DMI_PRODUCT_NAME, "80XF"), | |
1149 | DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), | |
ec625a37 CC |
1150 | }, |
1151 | }, | |
a90b4038 LT |
1152 | {}, |
1153 | }; | |
1154 | ||
75646e75 LT |
1155 | /* |
1156 | * Some machines'(E,G Lenovo Z480) ECs are not stable | |
1157 | * during boot up and this causes battery driver fails to be | |
1158 | * probed due to failure of getting battery information | |
1159 | * from EC sometimes. After several retries, the operation | |
1160 | * may work. So add retry code here and 20ms sleep between | |
1161 | * every retries. | |
1162 | */ | |
1163 | static int acpi_battery_update_retry(struct acpi_battery *battery) | |
1164 | { | |
1165 | int retry, ret; | |
1166 | ||
1167 | for (retry = 5; retry; retry--) { | |
1168 | ret = acpi_battery_update(battery, false); | |
1169 | if (!ret) | |
1170 | break; | |
1171 | ||
1172 | msleep(20); | |
1173 | } | |
1174 | return ret; | |
1175 | } | |
1176 | ||
4be44fcd | 1177 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1178 | { |
4be44fcd | 1179 | int result = 0; |
4be44fcd | 1180 | struct acpi_battery *battery = NULL; |
952c63e9 | 1181 | |
1da177e4 | 1182 | if (!device) |
d550d98d | 1183 | return -EINVAL; |
40e7fcb1 LT |
1184 | |
1185 | if (device->dep_unmet) | |
1186 | return -EPROBE_DEFER; | |
1187 | ||
36bcbec7 | 1188 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1189 | if (!battery) |
d550d98d | 1190 | return -ENOMEM; |
145def84 | 1191 | battery->device = device; |
1da177e4 LT |
1192 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1193 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1194 | device->driver_data = battery; |
038fdea2 | 1195 | mutex_init(&battery->lock); |
69d94ec6 | 1196 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1197 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1198 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
75646e75 LT |
1199 | |
1200 | result = acpi_battery_update_retry(battery); | |
eb03cb02 SH |
1201 | if (result) |
1202 | goto fail; | |
75646e75 | 1203 | |
dd1fca9e | 1204 | pr_info(PREFIX "%s Slot [%s] (battery %s)\n", |
e80bba4b SH |
1205 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
1206 | device->status.battery_present ? "present" : "absent"); | |
1207 | ||
25be5821 KM |
1208 | battery->pm_nb.notifier_call = battery_notify; |
1209 | register_pm_notifier(&battery->pm_nb); | |
1210 | ||
e0d1f09e ZR |
1211 | device_init_wakeup(&device->dev, 1); |
1212 | ||
d550d98d | 1213 | return result; |
e80bba4b SH |
1214 | |
1215 | fail: | |
1216 | sysfs_remove_battery(battery); | |
1217 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1218 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1219 | kfree(battery); |
1220 | return result; | |
1da177e4 LT |
1221 | } |
1222 | ||
51fac838 | 1223 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1224 | { |
4be44fcd | 1225 | struct acpi_battery *battery = NULL; |
1da177e4 | 1226 | |
1da177e4 | 1227 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1228 | return -EINVAL; |
e0d1f09e | 1229 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1230 | battery = acpi_driver_data(device); |
25be5821 | 1231 | unregister_pm_notifier(&battery->pm_nb); |
508df92d | 1232 | sysfs_remove_battery(battery); |
038fdea2 | 1233 | mutex_destroy(&battery->lock); |
69d94ec6 | 1234 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1235 | kfree(battery); |
d550d98d | 1236 | return 0; |
1da177e4 LT |
1237 | } |
1238 | ||
90692404 | 1239 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1240 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1241 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1242 | { |
1243 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1244 | |
1245 | if (!dev) | |
34c4415a | 1246 | return -EINVAL; |
a6f50dc8 RW |
1247 | |
1248 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1249 | if (!battery) | |
1250 | return -EINVAL; | |
1251 | ||
f1d4661a | 1252 | battery->update_time = 0; |
9e50bc14 | 1253 | acpi_battery_update(battery, true); |
b6ce4083 | 1254 | return 0; |
34c4415a | 1255 | } |
7f6895c6 SK |
1256 | #else |
1257 | #define acpi_battery_resume NULL | |
90692404 | 1258 | #endif |
34c4415a | 1259 | |
a6f50dc8 RW |
1260 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1261 | ||
aa650bbd AS |
1262 | static struct acpi_driver acpi_battery_driver = { |
1263 | .name = "battery", | |
1264 | .class = ACPI_BATTERY_CLASS, | |
1265 | .ids = battery_device_ids, | |
d9406691 | 1266 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1267 | .ops = { |
1268 | .add = acpi_battery_add, | |
aa650bbd | 1269 | .remove = acpi_battery_remove, |
d9406691 | 1270 | .notify = acpi_battery_notify, |
aa650bbd | 1271 | }, |
a6f50dc8 | 1272 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1273 | }; |
1274 | ||
b0cbc861 | 1275 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1276 | { |
dccfae6d | 1277 | unsigned int i; |
479faaf0 LH |
1278 | int result; |
1279 | ||
3f5dc08f | 1280 | dmi_check_system(bat_dmi_table); |
479faaf0 | 1281 | |
ec625a37 CC |
1282 | if (battery_check_pmic) { |
1283 | for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++) | |
1284 | if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) { | |
1285 | pr_info(PREFIX ACPI_BATTERY_DEVICE_NAME | |
1286 | ": found native %s PMIC, not loading\n", | |
1287 | acpi_battery_blacklist[i]); | |
1288 | return; | |
1289 | } | |
1290 | } | |
1291 | ||
479faaf0 | 1292 | result = acpi_bus_register_driver(&acpi_battery_driver); |
bc39fbcf | 1293 | battery_driver_registered = (result == 0); |
0f66af53 AV |
1294 | } |
1295 | ||
1296 | static int __init acpi_battery_init(void) | |
1297 | { | |
e234b074 LH |
1298 | if (acpi_disabled) |
1299 | return -ENODEV; | |
1300 | ||
eca21d91 | 1301 | async_cookie = async_schedule(acpi_battery_init_async, NULL); |
d550d98d | 1302 | return 0; |
1da177e4 LT |
1303 | } |
1304 | ||
4be44fcd | 1305 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1306 | { |
5dfa0c73 | 1307 | async_synchronize_cookie(async_cookie + 1); |
fa93854f | 1308 | if (battery_driver_registered) { |
bc39fbcf | 1309 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fa93854f OG |
1310 | battery_hook_exit(); |
1311 | } | |
1da177e4 LT |
1312 | } |
1313 | ||
1da177e4 LT |
1314 | module_init(acpi_battery_init); |
1315 | module_exit(acpi_battery_exit); |