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1da177e4 | 1 | /* |
aa650bbd | 2 | * battery.c - ACPI Battery Driver (Revision: 2.0) |
1da177e4 | 3 | * |
aa650bbd AS |
4 | * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
5 | * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> | |
1da177e4 LT |
6 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
7 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
8 | * | |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or (at | |
14 | * your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with this program; if not, write to the Free Software Foundation, Inc., | |
23 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
24 | * | |
25 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/types.h> | |
f1d4661a | 32 | #include <linux/jiffies.h> |
0f66af53 | 33 | #include <linux/async.h> |
bc76f90b | 34 | #include <linux/dmi.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
25be5821 | 36 | #include <linux/suspend.h> |
4000e626 | 37 | #include <asm/unaligned.h> |
d7380965 | 38 | |
8b48463f | 39 | #include <linux/acpi.h> |
d7380965 AS |
40 | #include <linux/power_supply.h> |
41 | ||
f03be352 AM |
42 | #include "battery.h" |
43 | ||
a192a958 LB |
44 | #define PREFIX "ACPI: " |
45 | ||
1da177e4 LT |
46 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
47 | ||
1da177e4 | 48 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 | 49 | |
ae6f6187 LT |
50 | /* Battery power unit: 0 means mW, 1 means mA */ |
51 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
52 | ||
1da177e4 | 53 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 54 | |
f52fd66d | 55 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 56 | |
f52fd66d | 57 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 58 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 59 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
60 | MODULE_LICENSE("GPL"); |
61 | ||
a90b4038 | 62 | static int battery_bix_broken_package; |
f1d4661a AS |
63 | static unsigned int cache_time = 1000; |
64 | module_param(cache_time, uint, 0644); | |
65 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 66 | |
1ba90e3a TR |
67 | static const struct acpi_device_id battery_device_ids[] = { |
68 | {"PNP0C0A", 0}, | |
69 | {"", 0}, | |
70 | }; | |
1ba90e3a | 71 | |
aa650bbd | 72 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 73 | |
7b3bcc4a AS |
74 | enum { |
75 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 76 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 77 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
78 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
79 | switches between mWh and mAh depending on whether the system | |
80 | is running on battery or not. When mAh is the unit, most | |
81 | reported values are incorrect and need to be adjusted by | |
82 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
83 | Pre-2010 and 2012 models appear to always report in mWh and | |
84 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
85 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
86 | the 2011 models that fixes the issue (tested on x220 with a | |
87 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
88 | available for the 2010 models. */ | |
89 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
7b3bcc4a | 90 | }; |
78490d82 | 91 | |
1da177e4 | 92 | struct acpi_battery { |
038fdea2 | 93 | struct mutex lock; |
69d94ec6 | 94 | struct mutex sysfs_lock; |
d7380965 | 95 | struct power_supply bat; |
f1d4661a | 96 | struct acpi_device *device; |
25be5821 | 97 | struct notifier_block pm_nb; |
f1d4661a | 98 | unsigned long update_time; |
016d5baa | 99 | int revision; |
7faa144a | 100 | int rate_now; |
d7380965 AS |
101 | int capacity_now; |
102 | int voltage_now; | |
038fdea2 | 103 | int design_capacity; |
d7380965 | 104 | int full_charge_capacity; |
038fdea2 AS |
105 | int technology; |
106 | int design_voltage; | |
107 | int design_capacity_warning; | |
108 | int design_capacity_low; | |
c67fcd67 AS |
109 | int cycle_count; |
110 | int measurement_accuracy; | |
111 | int max_sampling_time; | |
112 | int min_sampling_time; | |
113 | int max_averaging_interval; | |
114 | int min_averaging_interval; | |
038fdea2 AS |
115 | int capacity_granularity_1; |
116 | int capacity_granularity_2; | |
f1d4661a | 117 | int alarm; |
038fdea2 AS |
118 | char model_number[32]; |
119 | char serial_number[32]; | |
120 | char type[32]; | |
121 | char oem_info[32]; | |
f1d4661a AS |
122 | int state; |
123 | int power_unit; | |
7b3bcc4a | 124 | unsigned long flags; |
1da177e4 LT |
125 | }; |
126 | ||
497888cf | 127 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
d7380965 | 128 | |
efd941f1 | 129 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 130 | { |
78490d82 AS |
131 | return battery->device->status.battery_present; |
132 | } | |
038fdea2 | 133 | |
d7380965 AS |
134 | static int acpi_battery_technology(struct acpi_battery *battery) |
135 | { | |
136 | if (!strcasecmp("NiCd", battery->type)) | |
137 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
138 | if (!strcasecmp("NiMH", battery->type)) | |
139 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
140 | if (!strcasecmp("LION", battery->type)) | |
141 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 142 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 143 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
144 | if (!strcasecmp("LiP", battery->type)) |
145 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
146 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
147 | } | |
148 | ||
9104476e | 149 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 150 | |
56f382a0 RH |
151 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
152 | { | |
153 | /* either charging or discharging */ | |
154 | if (battery->state != 0) | |
155 | return 0; | |
156 | ||
157 | /* battery not reporting charge */ | |
158 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
159 | battery->capacity_now == 0) | |
160 | return 0; | |
161 | ||
162 | /* good batteries update full_charge as the batteries degrade */ | |
163 | if (battery->full_charge_capacity == battery->capacity_now) | |
164 | return 1; | |
165 | ||
166 | /* fallback to using design values for broken batteries */ | |
167 | if (battery->design_capacity == battery->capacity_now) | |
168 | return 1; | |
169 | ||
170 | /* we don't do any sort of metric based on percentages */ | |
171 | return 0; | |
172 | } | |
173 | ||
d7380965 AS |
174 | static int acpi_battery_get_property(struct power_supply *psy, |
175 | enum power_supply_property psp, | |
176 | union power_supply_propval *val) | |
177 | { | |
a1b4bd69 | 178 | int ret = 0; |
d7380965 AS |
179 | struct acpi_battery *battery = to_acpi_battery(psy); |
180 | ||
9104476e AS |
181 | if (acpi_battery_present(battery)) { |
182 | /* run battery update only if it is present */ | |
183 | acpi_battery_get_state(battery); | |
184 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
185 | return -ENODEV; |
186 | switch (psp) { | |
187 | case POWER_SUPPLY_PROP_STATUS: | |
188 | if (battery->state & 0x01) | |
189 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
190 | else if (battery->state & 0x02) | |
191 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
56f382a0 | 192 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 193 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
194 | else |
195 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
196 | break; |
197 | case POWER_SUPPLY_PROP_PRESENT: | |
198 | val->intval = acpi_battery_present(battery); | |
199 | break; | |
200 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
201 | val->intval = acpi_battery_technology(battery); | |
202 | break; | |
c67fcd67 AS |
203 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
204 | val->intval = battery->cycle_count; | |
205 | break; | |
d7380965 | 206 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
207 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
208 | ret = -ENODEV; | |
209 | else | |
210 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
211 | break; |
212 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
213 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
214 | ret = -ENODEV; | |
215 | else | |
216 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
217 | break; |
218 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 219 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
220 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
221 | ret = -ENODEV; | |
222 | else | |
223 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
224 | break; |
225 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
226 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
227 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
228 | ret = -ENODEV; | |
229 | else | |
230 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
231 | break; |
232 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
233 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
234 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
235 | ret = -ENODEV; | |
236 | else | |
237 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
238 | break; |
239 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
240 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
241 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
242 | ret = -ENODEV; | |
243 | else | |
244 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 245 | break; |
a58e1150 | 246 | case POWER_SUPPLY_PROP_CAPACITY: |
247 | if (battery->capacity_now && battery->full_charge_capacity) | |
248 | val->intval = battery->capacity_now * 100/ | |
249 | battery->full_charge_capacity; | |
250 | else | |
251 | val->intval = 0; | |
252 | break; | |
d7380965 AS |
253 | case POWER_SUPPLY_PROP_MODEL_NAME: |
254 | val->strval = battery->model_number; | |
255 | break; | |
256 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
257 | val->strval = battery->oem_info; | |
258 | break; | |
7c2670bb | 259 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
260 | val->strval = battery->serial_number; | |
261 | break; | |
d7380965 | 262 | default: |
a1b4bd69 | 263 | ret = -EINVAL; |
d7380965 | 264 | } |
a1b4bd69 | 265 | return ret; |
d7380965 AS |
266 | } |
267 | ||
268 | static enum power_supply_property charge_battery_props[] = { | |
269 | POWER_SUPPLY_PROP_STATUS, | |
270 | POWER_SUPPLY_PROP_PRESENT, | |
271 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 272 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
273 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
274 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
275 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
276 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
277 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
278 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 279 | POWER_SUPPLY_PROP_CAPACITY, |
d7380965 AS |
280 | POWER_SUPPLY_PROP_MODEL_NAME, |
281 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 282 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
283 | }; |
284 | ||
285 | static enum power_supply_property energy_battery_props[] = { | |
286 | POWER_SUPPLY_PROP_STATUS, | |
287 | POWER_SUPPLY_PROP_PRESENT, | |
288 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 289 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
290 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
291 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 292 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
293 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
294 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
295 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 296 | POWER_SUPPLY_PROP_CAPACITY, |
d7380965 AS |
297 | POWER_SUPPLY_PROP_MODEL_NAME, |
298 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 299 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
300 | }; |
301 | ||
78490d82 AS |
302 | /* -------------------------------------------------------------------------- |
303 | Battery Management | |
304 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
305 | struct acpi_offsets { |
306 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
307 | u8 mode; /* int or string? */ | |
308 | }; | |
b6ce4083 | 309 | |
038fdea2 AS |
310 | static struct acpi_offsets state_offsets[] = { |
311 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 312 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
313 | {offsetof(struct acpi_battery, capacity_now), 0}, |
314 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 315 | }; |
b6ce4083 | 316 | |
038fdea2 AS |
317 | static struct acpi_offsets info_offsets[] = { |
318 | {offsetof(struct acpi_battery, power_unit), 0}, | |
319 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 320 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
321 | {offsetof(struct acpi_battery, technology), 0}, |
322 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
323 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
324 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
325 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
326 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
327 | {offsetof(struct acpi_battery, model_number), 1}, | |
328 | {offsetof(struct acpi_battery, serial_number), 1}, | |
329 | {offsetof(struct acpi_battery, type), 1}, | |
330 | {offsetof(struct acpi_battery, oem_info), 1}, | |
331 | }; | |
b6ce4083 | 332 | |
c67fcd67 | 333 | static struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 334 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
335 | {offsetof(struct acpi_battery, power_unit), 0}, |
336 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
337 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
338 | {offsetof(struct acpi_battery, technology), 0}, | |
339 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
340 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
341 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
342 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
343 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
344 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
345 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
346 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
347 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
348 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
349 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
350 | {offsetof(struct acpi_battery, model_number), 1}, | |
351 | {offsetof(struct acpi_battery, serial_number), 1}, | |
352 | {offsetof(struct acpi_battery, type), 1}, | |
353 | {offsetof(struct acpi_battery, oem_info), 1}, | |
354 | }; | |
355 | ||
038fdea2 AS |
356 | static int extract_package(struct acpi_battery *battery, |
357 | union acpi_object *package, | |
358 | struct acpi_offsets *offsets, int num) | |
359 | { | |
106449e8 | 360 | int i; |
038fdea2 AS |
361 | union acpi_object *element; |
362 | if (package->type != ACPI_TYPE_PACKAGE) | |
363 | return -EFAULT; | |
364 | for (i = 0; i < num; ++i) { | |
365 | if (package->package.count <= i) | |
366 | return -EFAULT; | |
367 | element = &package->package.elements[i]; | |
368 | if (offsets[i].mode) { | |
106449e8 AS |
369 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
370 | if (element->type == ACPI_TYPE_STRING || | |
371 | element->type == ACPI_TYPE_BUFFER) | |
372 | strncpy(ptr, element->string.pointer, 32); | |
373 | else if (element->type == ACPI_TYPE_INTEGER) { | |
374 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
375 | sizeof(u64)); |
376 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
377 | } else |
378 | *ptr = 0; /* don't have value */ | |
038fdea2 | 379 | } else { |
b8a1bdb1 AS |
380 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
381 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
382 | element->integer.value : -1; | |
038fdea2 | 383 | } |
b6ce4083 | 384 | } |
b6ce4083 VL |
385 | return 0; |
386 | } | |
387 | ||
388 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
389 | { | |
aa650bbd | 390 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
391 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
392 | return -ENODEV; | |
393 | } | |
aa650bbd | 394 | return 0; |
b6ce4083 VL |
395 | } |
396 | ||
397 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 398 | { |
aa650bbd | 399 | int result = -EFAULT; |
4be44fcd | 400 | acpi_status status = 0; |
0f4c6547 | 401 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? |
c67fcd67 AS |
402 | "_BIX" : "_BIF"; |
403 | ||
4be44fcd | 404 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 405 | |
b6ce4083 VL |
406 | if (!acpi_battery_present(battery)) |
407 | return 0; | |
038fdea2 | 408 | mutex_lock(&battery->lock); |
c67fcd67 AS |
409 | status = acpi_evaluate_object(battery->device->handle, name, |
410 | NULL, &buffer); | |
038fdea2 | 411 | mutex_unlock(&battery->lock); |
aa650bbd | 412 | |
1da177e4 | 413 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 414 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 415 | return -ENODEV; |
1da177e4 | 416 | } |
a90b4038 LT |
417 | |
418 | if (battery_bix_broken_package) | |
419 | result = extract_package(battery, buffer.pointer, | |
420 | extended_info_offsets + 1, | |
421 | ARRAY_SIZE(extended_info_offsets) - 1); | |
422 | else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) | |
c67fcd67 AS |
423 | result = extract_package(battery, buffer.pointer, |
424 | extended_info_offsets, | |
425 | ARRAY_SIZE(extended_info_offsets)); | |
426 | else | |
427 | result = extract_package(battery, buffer.pointer, | |
428 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 429 | kfree(buffer.pointer); |
557d5868 ZR |
430 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
431 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
432 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
433 | battery->power_unit && battery->design_voltage) { | |
434 | battery->design_capacity = battery->design_capacity * | |
435 | 10000 / battery->design_voltage; | |
436 | battery->full_charge_capacity = battery->full_charge_capacity * | |
437 | 10000 / battery->design_voltage; | |
438 | battery->design_capacity_warning = | |
439 | battery->design_capacity_warning * | |
440 | 10000 / battery->design_voltage; | |
441 | /* Curiously, design_capacity_low, unlike the rest of them, | |
442 | is correct. */ | |
443 | /* capacity_granularity_* equal 1 on the systems tested, so | |
444 | it's impossible to tell if they would need an adjustment | |
445 | or not if their values were higher. */ | |
446 | } | |
d550d98d | 447 | return result; |
1da177e4 LT |
448 | } |
449 | ||
b6ce4083 | 450 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 451 | { |
4be44fcd LB |
452 | int result = 0; |
453 | acpi_status status = 0; | |
454 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 455 | |
b6ce4083 VL |
456 | if (!acpi_battery_present(battery)) |
457 | return 0; | |
1da177e4 | 458 | |
f1d4661a AS |
459 | if (battery->update_time && |
460 | time_before(jiffies, battery->update_time + | |
461 | msecs_to_jiffies(cache_time))) | |
462 | return 0; | |
463 | ||
038fdea2 | 464 | mutex_lock(&battery->lock); |
f1d4661a | 465 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
466 | NULL, &buffer); |
467 | mutex_unlock(&battery->lock); | |
5b31d895 | 468 | |
1da177e4 | 469 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 470 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 471 | return -ENODEV; |
1da177e4 | 472 | } |
aa650bbd | 473 | |
038fdea2 AS |
474 | result = extract_package(battery, buffer.pointer, |
475 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 476 | battery->update_time = jiffies; |
78490d82 | 477 | kfree(buffer.pointer); |
bc76f90b | 478 | |
55003b21 LT |
479 | /* For buggy DSDTs that report negative 16-bit values for either |
480 | * charging or discharging current and/or report 0 as 65536 | |
481 | * due to bad math. | |
482 | */ | |
483 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
484 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
485 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 486 | battery->rate_now = abs((s16)battery->rate_now); |
55003b21 LT |
487 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
488 | " invalid.\n"); | |
489 | } | |
bc76f90b | 490 | |
557d5868 ZR |
491 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
492 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
493 | battery->capacity_now = (battery->capacity_now * | |
494 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
495 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
496 | battery->power_unit && battery->design_voltage) { | |
497 | battery->capacity_now = battery->capacity_now * | |
498 | 10000 / battery->design_voltage; | |
499 | } | |
b6ce4083 VL |
500 | return result; |
501 | } | |
1da177e4 | 502 | |
aa650bbd | 503 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 504 | { |
4be44fcd | 505 | acpi_status status = 0; |
1da177e4 | 506 | |
c67fcd67 | 507 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 508 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 509 | return -ENODEV; |
1da177e4 | 510 | |
038fdea2 | 511 | mutex_lock(&battery->lock); |
0db98202 JL |
512 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
513 | battery->alarm); | |
038fdea2 | 514 | mutex_unlock(&battery->lock); |
aa650bbd | 515 | |
1da177e4 | 516 | if (ACPI_FAILURE(status)) |
d550d98d | 517 | return -ENODEV; |
1da177e4 | 518 | |
aa650bbd | 519 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 520 | return 0; |
1da177e4 LT |
521 | } |
522 | ||
b6ce4083 | 523 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 524 | { |
b6ce4083 | 525 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 526 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 527 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 528 | return 0; |
b6ce4083 | 529 | } |
7b3bcc4a | 530 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
531 | if (!battery->alarm) |
532 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 533 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 534 | } |
1da177e4 | 535 | |
508df92d AB |
536 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
537 | struct device_attribute *attr, | |
538 | char *buf) | |
539 | { | |
540 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
541 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
542 | } | |
543 | ||
544 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
545 | struct device_attribute *attr, | |
546 | const char *buf, size_t count) | |
547 | { | |
548 | unsigned long x; | |
549 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 550 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
551 | battery->alarm = x/1000; |
552 | if (acpi_battery_present(battery)) | |
553 | acpi_battery_set_alarm(battery); | |
554 | return count; | |
555 | } | |
556 | ||
557 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 558 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
559 | .show = acpi_battery_alarm_show, |
560 | .store = acpi_battery_alarm_store, | |
561 | }; | |
562 | ||
563 | static int sysfs_add_battery(struct acpi_battery *battery) | |
564 | { | |
565 | int result; | |
566 | ||
ae6f6187 | 567 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
508df92d AB |
568 | battery->bat.properties = charge_battery_props; |
569 | battery->bat.num_properties = | |
570 | ARRAY_SIZE(charge_battery_props); | |
571 | } else { | |
572 | battery->bat.properties = energy_battery_props; | |
573 | battery->bat.num_properties = | |
574 | ARRAY_SIZE(energy_battery_props); | |
575 | } | |
576 | ||
577 | battery->bat.name = acpi_device_bid(battery->device); | |
578 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
579 | battery->bat.get_property = acpi_battery_get_property; | |
580 | ||
581 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
582 | if (result) | |
583 | return result; | |
584 | return device_create_file(battery->bat.dev, &alarm_attr); | |
585 | } | |
586 | ||
587 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
588 | { | |
69d94ec6 | 589 | mutex_lock(&battery->sysfs_lock); |
9c921c22 | 590 | if (!battery->bat.dev) { |
69d94ec6 | 591 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 592 | return; |
9c921c22 LT |
593 | } |
594 | ||
508df92d AB |
595 | device_remove_file(battery->bat.dev, &alarm_attr); |
596 | power_supply_unregister(&battery->bat); | |
9104476e | 597 | battery->bat.dev = NULL; |
69d94ec6 | 598 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
599 | } |
600 | ||
4000e626 KI |
601 | static void find_battery(const struct dmi_header *dm, void *private) |
602 | { | |
603 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
604 | /* Note: the hardcoded offsets below have been extracted from | |
605 | the source code of dmidecode. */ | |
606 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
607 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
608 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
609 | if (dm->length >= 18) | |
610 | dmi_capacity *= dmi_data[17]; | |
611 | if (battery->design_capacity * battery->design_voltage / 1000 | |
612 | != dmi_capacity && | |
613 | battery->design_capacity * 10 == dmi_capacity) | |
614 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
615 | &battery->flags); | |
616 | } | |
617 | } | |
618 | ||
557d5868 ZR |
619 | /* |
620 | * According to the ACPI spec, some kinds of primary batteries can | |
621 | * report percentage battery remaining capacity directly to OS. | |
622 | * In this case, it reports the Last Full Charged Capacity == 100 | |
623 | * and BatteryPresentRate == 0xFFFFFFFF. | |
624 | * | |
625 | * Now we found some battery reports percentage remaining capacity | |
626 | * even if it's rechargeable. | |
627 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
628 | * | |
629 | * Handle this correctly so that they won't break userspace. | |
630 | */ | |
7b78622d | 631 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
632 | { |
633 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 634 | return; |
557d5868 | 635 | |
0f4c6547 NM |
636 | if (battery->full_charge_capacity == 100 && |
637 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
638 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
639 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
640 | battery->full_charge_capacity = battery->design_capacity; | |
641 | battery->capacity_now = (battery->capacity_now * | |
642 | battery->full_charge_capacity) / 100; | |
643 | } | |
4000e626 KI |
644 | |
645 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 646 | return; |
4000e626 KI |
647 | |
648 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
649 | const char *s; | |
650 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
651 | if (s && !strnicmp(s, "ThinkPad", 8)) { | |
652 | dmi_walk(find_battery, battery); | |
653 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
654 | &battery->flags) && | |
655 | battery->design_voltage) { | |
656 | battery->design_capacity = | |
657 | battery->design_capacity * | |
658 | 10000 / battery->design_voltage; | |
659 | battery->full_charge_capacity = | |
660 | battery->full_charge_capacity * | |
661 | 10000 / battery->design_voltage; | |
662 | battery->design_capacity_warning = | |
663 | battery->design_capacity_warning * | |
664 | 10000 / battery->design_voltage; | |
665 | battery->capacity_now = battery->capacity_now * | |
666 | 10000 / battery->design_voltage; | |
667 | } | |
668 | } | |
669 | } | |
557d5868 ZR |
670 | } |
671 | ||
f1d4661a | 672 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 673 | { |
50b17851 | 674 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 675 | result = acpi_battery_get_status(battery); |
508df92d | 676 | if (result) |
b6ce4083 | 677 | return result; |
508df92d AB |
678 | if (!acpi_battery_present(battery)) { |
679 | sysfs_remove_battery(battery); | |
97749cd9 | 680 | battery->update_time = 0; |
508df92d | 681 | return 0; |
b6ce4083 | 682 | } |
50b17851 AS |
683 | if (!battery->update_time || |
684 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
685 | result = acpi_battery_get_info(battery); |
686 | if (result) | |
687 | return result; | |
688 | acpi_battery_init_alarm(battery); | |
689 | } | |
eb03cb02 SH |
690 | if (!battery->bat.dev) { |
691 | result = sysfs_add_battery(battery); | |
692 | if (result) | |
693 | return result; | |
694 | } | |
557d5868 | 695 | result = acpi_battery_get_state(battery); |
7b78622d | 696 | acpi_battery_quirks(battery); |
557d5868 | 697 | return result; |
4bd35cdb VL |
698 | } |
699 | ||
da8aeb92 RW |
700 | static void acpi_battery_refresh(struct acpi_battery *battery) |
701 | { | |
c5971456 AW |
702 | int power_unit; |
703 | ||
da8aeb92 RW |
704 | if (!battery->bat.dev) |
705 | return; | |
706 | ||
c5971456 AW |
707 | power_unit = battery->power_unit; |
708 | ||
da8aeb92 | 709 | acpi_battery_get_info(battery); |
c5971456 AW |
710 | |
711 | if (power_unit == battery->power_unit) | |
712 | return; | |
713 | ||
714 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
715 | sysfs_remove_battery(battery); |
716 | sysfs_add_battery(battery); | |
717 | } | |
718 | ||
1da177e4 LT |
719 | /* -------------------------------------------------------------------------- |
720 | Driver Interface | |
721 | -------------------------------------------------------------------------- */ | |
722 | ||
d9406691 | 723 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 724 | { |
d9406691 | 725 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 726 | struct device *old; |
d9406691 | 727 | |
1da177e4 | 728 | if (!battery) |
d550d98d | 729 | return; |
153e500f | 730 | old = battery->bat.dev; |
da8aeb92 RW |
731 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
732 | acpi_battery_refresh(battery); | |
f1d4661a | 733 | acpi_battery_update(battery); |
f1d4661a | 734 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 735 | dev_name(&device->dev), event, |
9ea7d575 | 736 | acpi_battery_present(battery)); |
411e0f77 | 737 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 738 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 739 | if (old && battery->bat.dev) |
f79e1cec | 740 | power_supply_changed(&battery->bat); |
1da177e4 LT |
741 | } |
742 | ||
25be5821 KM |
743 | static int battery_notify(struct notifier_block *nb, |
744 | unsigned long mode, void *_unused) | |
745 | { | |
746 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
747 | pm_nb); | |
748 | switch (mode) { | |
d5a5911b | 749 | case PM_POST_HIBERNATION: |
25be5821 | 750 | case PM_POST_SUSPEND: |
6e17fb6a LT |
751 | if (battery->bat.dev) { |
752 | sysfs_remove_battery(battery); | |
753 | sysfs_add_battery(battery); | |
754 | } | |
25be5821 KM |
755 | break; |
756 | } | |
757 | ||
758 | return 0; | |
759 | } | |
760 | ||
a90b4038 LT |
761 | static struct dmi_system_id bat_dmi_table[] = { |
762 | { | |
763 | .ident = "NEC LZ750/LS", | |
764 | .matches = { | |
765 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
766 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
767 | }, | |
768 | }, | |
769 | {}, | |
770 | }; | |
771 | ||
4be44fcd | 772 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 773 | { |
4be44fcd | 774 | int result = 0; |
4be44fcd | 775 | struct acpi_battery *battery = NULL; |
952c63e9 | 776 | |
1da177e4 | 777 | if (!device) |
d550d98d | 778 | return -EINVAL; |
36bcbec7 | 779 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 780 | if (!battery) |
d550d98d | 781 | return -ENOMEM; |
145def84 | 782 | battery->device = device; |
1da177e4 LT |
783 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
784 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 785 | device->driver_data = battery; |
038fdea2 | 786 | mutex_init(&battery->lock); |
69d94ec6 | 787 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 788 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 789 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
eb03cb02 SH |
790 | result = acpi_battery_update(battery); |
791 | if (result) | |
792 | goto fail; | |
25be5821 | 793 | |
e80bba4b SH |
794 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
795 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
796 | device->status.battery_present ? "present" : "absent"); | |
797 | ||
25be5821 KM |
798 | battery->pm_nb.notifier_call = battery_notify; |
799 | register_pm_notifier(&battery->pm_nb); | |
800 | ||
d550d98d | 801 | return result; |
e80bba4b SH |
802 | |
803 | fail: | |
804 | sysfs_remove_battery(battery); | |
805 | mutex_destroy(&battery->lock); | |
69d94ec6 | 806 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
807 | kfree(battery); |
808 | return result; | |
1da177e4 LT |
809 | } |
810 | ||
51fac838 | 811 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 812 | { |
4be44fcd | 813 | struct acpi_battery *battery = NULL; |
1da177e4 | 814 | |
1da177e4 | 815 | if (!device || !acpi_driver_data(device)) |
d550d98d | 816 | return -EINVAL; |
50dd0969 | 817 | battery = acpi_driver_data(device); |
25be5821 | 818 | unregister_pm_notifier(&battery->pm_nb); |
508df92d | 819 | sysfs_remove_battery(battery); |
038fdea2 | 820 | mutex_destroy(&battery->lock); |
69d94ec6 | 821 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 822 | kfree(battery); |
d550d98d | 823 | return 0; |
1da177e4 LT |
824 | } |
825 | ||
90692404 | 826 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 827 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 828 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
829 | { |
830 | struct acpi_battery *battery; | |
a6f50dc8 RW |
831 | |
832 | if (!dev) | |
34c4415a | 833 | return -EINVAL; |
a6f50dc8 RW |
834 | |
835 | battery = acpi_driver_data(to_acpi_device(dev)); | |
836 | if (!battery) | |
837 | return -EINVAL; | |
838 | ||
f1d4661a | 839 | battery->update_time = 0; |
508df92d | 840 | acpi_battery_update(battery); |
b6ce4083 | 841 | return 0; |
34c4415a | 842 | } |
7f6895c6 SK |
843 | #else |
844 | #define acpi_battery_resume NULL | |
90692404 | 845 | #endif |
34c4415a | 846 | |
a6f50dc8 RW |
847 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
848 | ||
aa650bbd AS |
849 | static struct acpi_driver acpi_battery_driver = { |
850 | .name = "battery", | |
851 | .class = ACPI_BATTERY_CLASS, | |
852 | .ids = battery_device_ids, | |
d9406691 | 853 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
854 | .ops = { |
855 | .add = acpi_battery_add, | |
aa650bbd | 856 | .remove = acpi_battery_remove, |
d9406691 | 857 | .notify = acpi_battery_notify, |
aa650bbd | 858 | }, |
a6f50dc8 | 859 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
860 | }; |
861 | ||
b0cbc861 | 862 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 863 | { |
4d8316d5 | 864 | if (acpi_disabled) |
0f66af53 | 865 | return; |
a90b4038 LT |
866 | |
867 | if (dmi_check_system(bat_dmi_table)) | |
868 | battery_bix_broken_package = 1; | |
1e2d9cdf | 869 | acpi_bus_register_driver(&acpi_battery_driver); |
0f66af53 AV |
870 | } |
871 | ||
872 | static int __init acpi_battery_init(void) | |
873 | { | |
874 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 875 | return 0; |
1da177e4 LT |
876 | } |
877 | ||
4be44fcd | 878 | static void __exit acpi_battery_exit(void) |
1da177e4 | 879 | { |
1da177e4 | 880 | acpi_bus_unregister_driver(&acpi_battery_driver); |
1da177e4 LT |
881 | } |
882 | ||
1da177e4 LT |
883 | module_init(acpi_battery_init); |
884 | module_exit(acpi_battery_exit); |