Commit | Line | Data |
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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> |
f43691c6 | 35 | #include <linux/delay.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
25be5821 | 37 | #include <linux/suspend.h> |
4000e626 | 38 | #include <asm/unaligned.h> |
d7380965 | 39 | |
3a670cc7 LT |
40 | #ifdef CONFIG_ACPI_PROCFS_POWER |
41 | #include <linux/proc_fs.h> | |
42 | #include <linux/seq_file.h> | |
43 | #include <asm/uaccess.h> | |
44 | #endif | |
45 | ||
8b48463f | 46 | #include <linux/acpi.h> |
d7380965 AS |
47 | #include <linux/power_supply.h> |
48 | ||
f03be352 AM |
49 | #include "battery.h" |
50 | ||
a192a958 LB |
51 | #define PREFIX "ACPI: " |
52 | ||
1da177e4 LT |
53 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
54 | ||
1da177e4 | 55 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 | 56 | |
ae6f6187 LT |
57 | /* Battery power unit: 0 means mW, 1 means mA */ |
58 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
59 | ||
1ac5aaa6 ZR |
60 | #define ACPI_BATTERY_STATE_DISCHARGING 0x1 |
61 | #define ACPI_BATTERY_STATE_CHARGING 0x2 | |
62 | #define ACPI_BATTERY_STATE_CRITICAL 0x4 | |
63 | ||
1da177e4 | 64 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 65 | |
f52fd66d | 66 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 67 | |
f52fd66d | 68 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 69 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 70 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
71 | MODULE_LICENSE("GPL"); |
72 | ||
eca21d91 | 73 | static async_cookie_t async_cookie; |
a90b4038 | 74 | static int battery_bix_broken_package; |
f43691c6 | 75 | static int battery_notification_delay_ms; |
f1d4661a AS |
76 | static unsigned int cache_time = 1000; |
77 | module_param(cache_time, uint, 0644); | |
78 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 79 | |
3a670cc7 LT |
80 | #ifdef CONFIG_ACPI_PROCFS_POWER |
81 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); | |
82 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
83 | ||
84 | enum acpi_battery_files { | |
85 | info_tag = 0, | |
86 | state_tag, | |
87 | alarm_tag, | |
88 | ACPI_BATTERY_NUMFILES, | |
89 | }; | |
90 | ||
91 | #endif | |
92 | ||
1ba90e3a TR |
93 | static const struct acpi_device_id battery_device_ids[] = { |
94 | {"PNP0C0A", 0}, | |
95 | {"", 0}, | |
96 | }; | |
1ba90e3a | 97 | |
aa650bbd | 98 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 99 | |
7b3bcc4a AS |
100 | enum { |
101 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 102 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 103 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
104 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
105 | switches between mWh and mAh depending on whether the system | |
106 | is running on battery or not. When mAh is the unit, most | |
107 | reported values are incorrect and need to be adjusted by | |
108 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
109 | Pre-2010 and 2012 models appear to always report in mWh and | |
110 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
111 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
112 | the 2011 models that fixes the issue (tested on x220 with a | |
113 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
114 | available for the 2010 models. */ | |
115 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
7b3bcc4a | 116 | }; |
78490d82 | 117 | |
1da177e4 | 118 | struct acpi_battery { |
038fdea2 | 119 | struct mutex lock; |
69d94ec6 | 120 | struct mutex sysfs_lock; |
297d716f KK |
121 | struct power_supply *bat; |
122 | struct power_supply_desc bat_desc; | |
f1d4661a | 123 | struct acpi_device *device; |
25be5821 | 124 | struct notifier_block pm_nb; |
f1d4661a | 125 | unsigned long update_time; |
016d5baa | 126 | int revision; |
7faa144a | 127 | int rate_now; |
d7380965 AS |
128 | int capacity_now; |
129 | int voltage_now; | |
038fdea2 | 130 | int design_capacity; |
d7380965 | 131 | int full_charge_capacity; |
038fdea2 AS |
132 | int technology; |
133 | int design_voltage; | |
134 | int design_capacity_warning; | |
135 | int design_capacity_low; | |
c67fcd67 AS |
136 | int cycle_count; |
137 | int measurement_accuracy; | |
138 | int max_sampling_time; | |
139 | int min_sampling_time; | |
140 | int max_averaging_interval; | |
141 | int min_averaging_interval; | |
038fdea2 AS |
142 | int capacity_granularity_1; |
143 | int capacity_granularity_2; | |
f1d4661a | 144 | int alarm; |
038fdea2 AS |
145 | char model_number[32]; |
146 | char serial_number[32]; | |
147 | char type[32]; | |
148 | char oem_info[32]; | |
f1d4661a AS |
149 | int state; |
150 | int power_unit; | |
7b3bcc4a | 151 | unsigned long flags; |
1da177e4 LT |
152 | }; |
153 | ||
297d716f | 154 | #define to_acpi_battery(x) power_supply_get_drvdata(x) |
d7380965 | 155 | |
efd941f1 | 156 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 157 | { |
78490d82 AS |
158 | return battery->device->status.battery_present; |
159 | } | |
038fdea2 | 160 | |
d7380965 AS |
161 | static int acpi_battery_technology(struct acpi_battery *battery) |
162 | { | |
163 | if (!strcasecmp("NiCd", battery->type)) | |
164 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
165 | if (!strcasecmp("NiMH", battery->type)) | |
166 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
167 | if (!strcasecmp("LION", battery->type)) | |
168 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 169 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 170 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
171 | if (!strcasecmp("LiP", battery->type)) |
172 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
173 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
174 | } | |
175 | ||
9104476e | 176 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 177 | |
56f382a0 RH |
178 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
179 | { | |
1ac5aaa6 | 180 | /* charging, discharging or critical low */ |
56f382a0 RH |
181 | if (battery->state != 0) |
182 | return 0; | |
183 | ||
184 | /* battery not reporting charge */ | |
185 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
186 | battery->capacity_now == 0) | |
187 | return 0; | |
188 | ||
189 | /* good batteries update full_charge as the batteries degrade */ | |
190 | if (battery->full_charge_capacity == battery->capacity_now) | |
191 | return 1; | |
192 | ||
193 | /* fallback to using design values for broken batteries */ | |
194 | if (battery->design_capacity == battery->capacity_now) | |
195 | return 1; | |
196 | ||
197 | /* we don't do any sort of metric based on percentages */ | |
198 | return 0; | |
199 | } | |
200 | ||
d7380965 AS |
201 | static int acpi_battery_get_property(struct power_supply *psy, |
202 | enum power_supply_property psp, | |
203 | union power_supply_propval *val) | |
204 | { | |
a1b4bd69 | 205 | int ret = 0; |
d7380965 AS |
206 | struct acpi_battery *battery = to_acpi_battery(psy); |
207 | ||
9104476e AS |
208 | if (acpi_battery_present(battery)) { |
209 | /* run battery update only if it is present */ | |
210 | acpi_battery_get_state(battery); | |
211 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
212 | return -ENODEV; |
213 | switch (psp) { | |
214 | case POWER_SUPPLY_PROP_STATUS: | |
1ac5aaa6 | 215 | if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) |
d7380965 | 216 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
1ac5aaa6 | 217 | else if (battery->state & ACPI_BATTERY_STATE_CHARGING) |
d7380965 | 218 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
56f382a0 | 219 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 220 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
221 | else |
222 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
223 | break; |
224 | case POWER_SUPPLY_PROP_PRESENT: | |
225 | val->intval = acpi_battery_present(battery); | |
226 | break; | |
227 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
228 | val->intval = acpi_battery_technology(battery); | |
229 | break; | |
c67fcd67 AS |
230 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
231 | val->intval = battery->cycle_count; | |
232 | break; | |
d7380965 | 233 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
234 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
235 | ret = -ENODEV; | |
236 | else | |
237 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
238 | break; |
239 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
240 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
241 | ret = -ENODEV; | |
242 | else | |
243 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
244 | break; |
245 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 246 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
247 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
248 | ret = -ENODEV; | |
249 | else | |
250 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
251 | break; |
252 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
253 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
254 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
255 | ret = -ENODEV; | |
256 | else | |
257 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
258 | break; |
259 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
260 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
261 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
262 | ret = -ENODEV; | |
263 | else | |
264 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
265 | break; |
266 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
267 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
268 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
269 | ret = -ENODEV; | |
270 | else | |
271 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 272 | break; |
a58e1150 | 273 | case POWER_SUPPLY_PROP_CAPACITY: |
274 | if (battery->capacity_now && battery->full_charge_capacity) | |
275 | val->intval = battery->capacity_now * 100/ | |
276 | battery->full_charge_capacity; | |
277 | else | |
278 | val->intval = 0; | |
279 | break; | |
1ac5aaa6 ZR |
280 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
281 | if (battery->state & ACPI_BATTERY_STATE_CRITICAL) | |
282 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
283 | else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
284 | (battery->capacity_now <= battery->alarm)) | |
285 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
286 | else if (acpi_battery_is_charged(battery)) | |
287 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
288 | else | |
289 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
290 | break; | |
d7380965 AS |
291 | case POWER_SUPPLY_PROP_MODEL_NAME: |
292 | val->strval = battery->model_number; | |
293 | break; | |
294 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
295 | val->strval = battery->oem_info; | |
296 | break; | |
7c2670bb | 297 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
298 | val->strval = battery->serial_number; | |
299 | break; | |
d7380965 | 300 | default: |
a1b4bd69 | 301 | ret = -EINVAL; |
d7380965 | 302 | } |
a1b4bd69 | 303 | return ret; |
d7380965 AS |
304 | } |
305 | ||
306 | static enum power_supply_property charge_battery_props[] = { | |
307 | POWER_SUPPLY_PROP_STATUS, | |
308 | POWER_SUPPLY_PROP_PRESENT, | |
309 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 310 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
311 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
312 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
313 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
314 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
315 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
316 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 317 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 318 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
319 | POWER_SUPPLY_PROP_MODEL_NAME, |
320 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 321 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
322 | }; |
323 | ||
324 | static enum power_supply_property energy_battery_props[] = { | |
325 | POWER_SUPPLY_PROP_STATUS, | |
326 | POWER_SUPPLY_PROP_PRESENT, | |
327 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 328 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
329 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
330 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 331 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
332 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
333 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
334 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 335 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 336 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
337 | POWER_SUPPLY_PROP_MODEL_NAME, |
338 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 339 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
340 | }; |
341 | ||
78490d82 AS |
342 | /* -------------------------------------------------------------------------- |
343 | Battery Management | |
344 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
345 | struct acpi_offsets { |
346 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
347 | u8 mode; /* int or string? */ | |
348 | }; | |
b6ce4083 | 349 | |
a4658784 | 350 | static const struct acpi_offsets state_offsets[] = { |
038fdea2 | 351 | {offsetof(struct acpi_battery, state), 0}, |
7faa144a | 352 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
353 | {offsetof(struct acpi_battery, capacity_now), 0}, |
354 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 355 | }; |
b6ce4083 | 356 | |
a4658784 | 357 | static const struct acpi_offsets info_offsets[] = { |
038fdea2 AS |
358 | {offsetof(struct acpi_battery, power_unit), 0}, |
359 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 360 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
361 | {offsetof(struct acpi_battery, technology), 0}, |
362 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
363 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
364 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
365 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
366 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
367 | {offsetof(struct acpi_battery, model_number), 1}, | |
368 | {offsetof(struct acpi_battery, serial_number), 1}, | |
369 | {offsetof(struct acpi_battery, type), 1}, | |
370 | {offsetof(struct acpi_battery, oem_info), 1}, | |
371 | }; | |
b6ce4083 | 372 | |
a4658784 | 373 | static const struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 374 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
375 | {offsetof(struct acpi_battery, power_unit), 0}, |
376 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
377 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
378 | {offsetof(struct acpi_battery, technology), 0}, | |
379 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
380 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
381 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
382 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
383 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
384 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
385 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
386 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
387 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
388 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
389 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
390 | {offsetof(struct acpi_battery, model_number), 1}, | |
391 | {offsetof(struct acpi_battery, serial_number), 1}, | |
392 | {offsetof(struct acpi_battery, type), 1}, | |
393 | {offsetof(struct acpi_battery, oem_info), 1}, | |
394 | }; | |
395 | ||
038fdea2 AS |
396 | static int extract_package(struct acpi_battery *battery, |
397 | union acpi_object *package, | |
a4658784 | 398 | const struct acpi_offsets *offsets, int num) |
038fdea2 | 399 | { |
106449e8 | 400 | int i; |
038fdea2 AS |
401 | union acpi_object *element; |
402 | if (package->type != ACPI_TYPE_PACKAGE) | |
403 | return -EFAULT; | |
404 | for (i = 0; i < num; ++i) { | |
405 | if (package->package.count <= i) | |
406 | return -EFAULT; | |
407 | element = &package->package.elements[i]; | |
408 | if (offsets[i].mode) { | |
106449e8 AS |
409 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
410 | if (element->type == ACPI_TYPE_STRING || | |
411 | element->type == ACPI_TYPE_BUFFER) | |
412 | strncpy(ptr, element->string.pointer, 32); | |
413 | else if (element->type == ACPI_TYPE_INTEGER) { | |
414 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
415 | sizeof(u64)); |
416 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
417 | } else |
418 | *ptr = 0; /* don't have value */ | |
038fdea2 | 419 | } else { |
b8a1bdb1 AS |
420 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
421 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
422 | element->integer.value : -1; | |
038fdea2 | 423 | } |
b6ce4083 | 424 | } |
b6ce4083 VL |
425 | return 0; |
426 | } | |
427 | ||
428 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
429 | { | |
aa650bbd | 430 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
431 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
432 | return -ENODEV; | |
433 | } | |
aa650bbd | 434 | return 0; |
b6ce4083 VL |
435 | } |
436 | ||
437 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 438 | { |
aa650bbd | 439 | int result = -EFAULT; |
4be44fcd | 440 | acpi_status status = 0; |
0f4c6547 | 441 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? |
c67fcd67 AS |
442 | "_BIX" : "_BIF"; |
443 | ||
4be44fcd | 444 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 445 | |
b6ce4083 VL |
446 | if (!acpi_battery_present(battery)) |
447 | return 0; | |
038fdea2 | 448 | mutex_lock(&battery->lock); |
c67fcd67 AS |
449 | status = acpi_evaluate_object(battery->device->handle, name, |
450 | NULL, &buffer); | |
038fdea2 | 451 | mutex_unlock(&battery->lock); |
aa650bbd | 452 | |
1da177e4 | 453 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 454 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 455 | return -ENODEV; |
1da177e4 | 456 | } |
a90b4038 LT |
457 | |
458 | if (battery_bix_broken_package) | |
459 | result = extract_package(battery, buffer.pointer, | |
460 | extended_info_offsets + 1, | |
461 | ARRAY_SIZE(extended_info_offsets) - 1); | |
462 | else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) | |
c67fcd67 AS |
463 | result = extract_package(battery, buffer.pointer, |
464 | extended_info_offsets, | |
465 | ARRAY_SIZE(extended_info_offsets)); | |
466 | else | |
467 | result = extract_package(battery, buffer.pointer, | |
468 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 469 | kfree(buffer.pointer); |
557d5868 ZR |
470 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
471 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
472 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
473 | battery->power_unit && battery->design_voltage) { | |
474 | battery->design_capacity = battery->design_capacity * | |
475 | 10000 / battery->design_voltage; | |
476 | battery->full_charge_capacity = battery->full_charge_capacity * | |
477 | 10000 / battery->design_voltage; | |
478 | battery->design_capacity_warning = | |
479 | battery->design_capacity_warning * | |
480 | 10000 / battery->design_voltage; | |
481 | /* Curiously, design_capacity_low, unlike the rest of them, | |
482 | is correct. */ | |
483 | /* capacity_granularity_* equal 1 on the systems tested, so | |
484 | it's impossible to tell if they would need an adjustment | |
485 | or not if their values were higher. */ | |
486 | } | |
d550d98d | 487 | return result; |
1da177e4 LT |
488 | } |
489 | ||
b6ce4083 | 490 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 491 | { |
4be44fcd LB |
492 | int result = 0; |
493 | acpi_status status = 0; | |
494 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 495 | |
b6ce4083 VL |
496 | if (!acpi_battery_present(battery)) |
497 | return 0; | |
1da177e4 | 498 | |
f1d4661a AS |
499 | if (battery->update_time && |
500 | time_before(jiffies, battery->update_time + | |
501 | msecs_to_jiffies(cache_time))) | |
502 | return 0; | |
503 | ||
038fdea2 | 504 | mutex_lock(&battery->lock); |
f1d4661a | 505 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
506 | NULL, &buffer); |
507 | mutex_unlock(&battery->lock); | |
5b31d895 | 508 | |
1da177e4 | 509 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 510 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 511 | return -ENODEV; |
1da177e4 | 512 | } |
aa650bbd | 513 | |
038fdea2 AS |
514 | result = extract_package(battery, buffer.pointer, |
515 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 516 | battery->update_time = jiffies; |
78490d82 | 517 | kfree(buffer.pointer); |
bc76f90b | 518 | |
55003b21 LT |
519 | /* For buggy DSDTs that report negative 16-bit values for either |
520 | * charging or discharging current and/or report 0 as 65536 | |
521 | * due to bad math. | |
522 | */ | |
523 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
524 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
525 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 526 | battery->rate_now = abs((s16)battery->rate_now); |
9237516c MK |
527 | printk_once(KERN_WARNING FW_BUG |
528 | "battery: (dis)charge rate invalid.\n"); | |
55003b21 | 529 | } |
bc76f90b | 530 | |
557d5868 ZR |
531 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
532 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
533 | battery->capacity_now = (battery->capacity_now * | |
534 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
535 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
536 | battery->power_unit && battery->design_voltage) { | |
537 | battery->capacity_now = battery->capacity_now * | |
538 | 10000 / battery->design_voltage; | |
539 | } | |
b6ce4083 VL |
540 | return result; |
541 | } | |
1da177e4 | 542 | |
aa650bbd | 543 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 544 | { |
4be44fcd | 545 | acpi_status status = 0; |
1da177e4 | 546 | |
c67fcd67 | 547 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 548 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 549 | return -ENODEV; |
1da177e4 | 550 | |
038fdea2 | 551 | mutex_lock(&battery->lock); |
0db98202 JL |
552 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
553 | battery->alarm); | |
038fdea2 | 554 | mutex_unlock(&battery->lock); |
aa650bbd | 555 | |
1da177e4 | 556 | if (ACPI_FAILURE(status)) |
d550d98d | 557 | return -ENODEV; |
1da177e4 | 558 | |
aa650bbd | 559 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 560 | return 0; |
1da177e4 LT |
561 | } |
562 | ||
b6ce4083 | 563 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 564 | { |
b6ce4083 | 565 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 566 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 567 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 568 | return 0; |
b6ce4083 | 569 | } |
7b3bcc4a | 570 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
571 | if (!battery->alarm) |
572 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 573 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 574 | } |
1da177e4 | 575 | |
508df92d AB |
576 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
577 | struct device_attribute *attr, | |
578 | char *buf) | |
579 | { | |
580 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
581 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
582 | } | |
583 | ||
584 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
585 | struct device_attribute *attr, | |
586 | const char *buf, size_t count) | |
587 | { | |
588 | unsigned long x; | |
589 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 590 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
591 | battery->alarm = x/1000; |
592 | if (acpi_battery_present(battery)) | |
593 | acpi_battery_set_alarm(battery); | |
594 | return count; | |
595 | } | |
596 | ||
597 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 598 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
599 | .show = acpi_battery_alarm_show, |
600 | .store = acpi_battery_alarm_store, | |
601 | }; | |
602 | ||
603 | static int sysfs_add_battery(struct acpi_battery *battery) | |
604 | { | |
297d716f | 605 | struct power_supply_config psy_cfg = { .drv_data = battery, }; |
508df92d | 606 | |
ae6f6187 | 607 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
297d716f KK |
608 | battery->bat_desc.properties = charge_battery_props; |
609 | battery->bat_desc.num_properties = | |
508df92d AB |
610 | ARRAY_SIZE(charge_battery_props); |
611 | } else { | |
297d716f KK |
612 | battery->bat_desc.properties = energy_battery_props; |
613 | battery->bat_desc.num_properties = | |
508df92d AB |
614 | ARRAY_SIZE(energy_battery_props); |
615 | } | |
616 | ||
297d716f KK |
617 | battery->bat_desc.name = acpi_device_bid(battery->device); |
618 | battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; | |
619 | battery->bat_desc.get_property = acpi_battery_get_property; | |
508df92d | 620 | |
297d716f KK |
621 | battery->bat = power_supply_register_no_ws(&battery->device->dev, |
622 | &battery->bat_desc, &psy_cfg); | |
e0d1f09e | 623 | |
297d716f KK |
624 | if (IS_ERR(battery->bat)) { |
625 | int result = PTR_ERR(battery->bat); | |
626 | ||
627 | battery->bat = NULL; | |
508df92d | 628 | return result; |
297d716f KK |
629 | } |
630 | return device_create_file(&battery->bat->dev, &alarm_attr); | |
508df92d AB |
631 | } |
632 | ||
633 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
634 | { | |
69d94ec6 | 635 | mutex_lock(&battery->sysfs_lock); |
297d716f | 636 | if (!battery->bat) { |
69d94ec6 | 637 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 638 | return; |
9c921c22 LT |
639 | } |
640 | ||
297d716f KK |
641 | device_remove_file(&battery->bat->dev, &alarm_attr); |
642 | power_supply_unregister(battery->bat); | |
643 | battery->bat = NULL; | |
69d94ec6 | 644 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
645 | } |
646 | ||
4000e626 KI |
647 | static void find_battery(const struct dmi_header *dm, void *private) |
648 | { | |
649 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
650 | /* Note: the hardcoded offsets below have been extracted from | |
651 | the source code of dmidecode. */ | |
652 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
653 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
654 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
655 | if (dm->length >= 18) | |
656 | dmi_capacity *= dmi_data[17]; | |
657 | if (battery->design_capacity * battery->design_voltage / 1000 | |
658 | != dmi_capacity && | |
659 | battery->design_capacity * 10 == dmi_capacity) | |
660 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
661 | &battery->flags); | |
662 | } | |
663 | } | |
664 | ||
557d5868 ZR |
665 | /* |
666 | * According to the ACPI spec, some kinds of primary batteries can | |
667 | * report percentage battery remaining capacity directly to OS. | |
668 | * In this case, it reports the Last Full Charged Capacity == 100 | |
669 | * and BatteryPresentRate == 0xFFFFFFFF. | |
670 | * | |
671 | * Now we found some battery reports percentage remaining capacity | |
672 | * even if it's rechargeable. | |
673 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
674 | * | |
675 | * Handle this correctly so that they won't break userspace. | |
676 | */ | |
7b78622d | 677 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
678 | { |
679 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 680 | return; |
557d5868 | 681 | |
0f4c6547 NM |
682 | if (battery->full_charge_capacity == 100 && |
683 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
684 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
685 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
686 | battery->full_charge_capacity = battery->design_capacity; | |
687 | battery->capacity_now = (battery->capacity_now * | |
688 | battery->full_charge_capacity) / 100; | |
689 | } | |
4000e626 KI |
690 | |
691 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 692 | return; |
4000e626 KI |
693 | |
694 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
695 | const char *s; | |
696 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
ffd8a731 | 697 | if (s && !strncasecmp(s, "ThinkPad", 8)) { |
4000e626 KI |
698 | dmi_walk(find_battery, battery); |
699 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
700 | &battery->flags) && | |
701 | battery->design_voltage) { | |
702 | battery->design_capacity = | |
703 | battery->design_capacity * | |
704 | 10000 / battery->design_voltage; | |
705 | battery->full_charge_capacity = | |
706 | battery->full_charge_capacity * | |
707 | 10000 / battery->design_voltage; | |
708 | battery->design_capacity_warning = | |
709 | battery->design_capacity_warning * | |
710 | 10000 / battery->design_voltage; | |
711 | battery->capacity_now = battery->capacity_now * | |
712 | 10000 / battery->design_voltage; | |
713 | } | |
714 | } | |
715 | } | |
557d5868 ZR |
716 | } |
717 | ||
9e50bc14 | 718 | static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
b6ce4083 | 719 | { |
50b17851 | 720 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 721 | result = acpi_battery_get_status(battery); |
508df92d | 722 | if (result) |
b6ce4083 | 723 | return result; |
508df92d AB |
724 | if (!acpi_battery_present(battery)) { |
725 | sysfs_remove_battery(battery); | |
97749cd9 | 726 | battery->update_time = 0; |
508df92d | 727 | return 0; |
b6ce4083 | 728 | } |
9e50bc14 LT |
729 | |
730 | if (resume) | |
731 | return 0; | |
732 | ||
50b17851 AS |
733 | if (!battery->update_time || |
734 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
735 | result = acpi_battery_get_info(battery); |
736 | if (result) | |
737 | return result; | |
738 | acpi_battery_init_alarm(battery); | |
739 | } | |
297d716f | 740 | if (!battery->bat) { |
eb03cb02 SH |
741 | result = sysfs_add_battery(battery); |
742 | if (result) | |
743 | return result; | |
744 | } | |
557d5868 | 745 | result = acpi_battery_get_state(battery); |
e0d1f09e ZR |
746 | if (result) |
747 | return result; | |
7b78622d | 748 | acpi_battery_quirks(battery); |
e0d1f09e ZR |
749 | |
750 | /* | |
751 | * Wakeup the system if battery is critical low | |
752 | * or lower than the alarm level | |
753 | */ | |
754 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
755 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
756 | (battery->capacity_now <= battery->alarm))) | |
757 | pm_wakeup_event(&battery->device->dev, 0); | |
758 | ||
557d5868 | 759 | return result; |
4bd35cdb VL |
760 | } |
761 | ||
da8aeb92 RW |
762 | static void acpi_battery_refresh(struct acpi_battery *battery) |
763 | { | |
c5971456 AW |
764 | int power_unit; |
765 | ||
297d716f | 766 | if (!battery->bat) |
da8aeb92 RW |
767 | return; |
768 | ||
c5971456 AW |
769 | power_unit = battery->power_unit; |
770 | ||
da8aeb92 | 771 | acpi_battery_get_info(battery); |
c5971456 AW |
772 | |
773 | if (power_unit == battery->power_unit) | |
774 | return; | |
775 | ||
776 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
777 | sysfs_remove_battery(battery); |
778 | sysfs_add_battery(battery); | |
779 | } | |
780 | ||
3a670cc7 LT |
781 | /* -------------------------------------------------------------------------- |
782 | FS Interface (/proc) | |
783 | -------------------------------------------------------------------------- */ | |
784 | ||
785 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
786 | static struct proc_dir_entry *acpi_battery_dir; | |
787 | ||
27059b91 MK |
788 | static const char *acpi_battery_units(const struct acpi_battery *battery) |
789 | { | |
790 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? | |
791 | "mA" : "mW"; | |
792 | } | |
793 | ||
3a670cc7 LT |
794 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
795 | { | |
796 | struct acpi_battery *battery = seq->private; | |
797 | ||
798 | if (result) | |
799 | goto end; | |
800 | ||
801 | seq_printf(seq, "present: %s\n", | |
802 | acpi_battery_present(battery) ? "yes" : "no"); | |
803 | if (!acpi_battery_present(battery)) | |
804 | goto end; | |
805 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
806 | seq_printf(seq, "design capacity: unknown\n"); | |
807 | else | |
808 | seq_printf(seq, "design capacity: %d %sh\n", | |
809 | battery->design_capacity, | |
810 | acpi_battery_units(battery)); | |
811 | ||
812 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
813 | seq_printf(seq, "last full capacity: unknown\n"); | |
814 | else | |
815 | seq_printf(seq, "last full capacity: %d %sh\n", | |
816 | battery->full_charge_capacity, | |
817 | acpi_battery_units(battery)); | |
818 | ||
819 | seq_printf(seq, "battery technology: %srechargeable\n", | |
820 | (!battery->technology)?"non-":""); | |
821 | ||
822 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
823 | seq_printf(seq, "design voltage: unknown\n"); | |
824 | else | |
825 | seq_printf(seq, "design voltage: %d mV\n", | |
826 | battery->design_voltage); | |
827 | seq_printf(seq, "design capacity warning: %d %sh\n", | |
828 | battery->design_capacity_warning, | |
829 | acpi_battery_units(battery)); | |
830 | seq_printf(seq, "design capacity low: %d %sh\n", | |
831 | battery->design_capacity_low, | |
832 | acpi_battery_units(battery)); | |
833 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); | |
834 | seq_printf(seq, "capacity granularity 1: %d %sh\n", | |
835 | battery->capacity_granularity_1, | |
836 | acpi_battery_units(battery)); | |
837 | seq_printf(seq, "capacity granularity 2: %d %sh\n", | |
838 | battery->capacity_granularity_2, | |
839 | acpi_battery_units(battery)); | |
840 | seq_printf(seq, "model number: %s\n", battery->model_number); | |
841 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
842 | seq_printf(seq, "battery type: %s\n", battery->type); | |
843 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
844 | end: | |
845 | if (result) | |
846 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
847 | return result; | |
848 | } | |
849 | ||
850 | static int acpi_battery_print_state(struct seq_file *seq, int result) | |
851 | { | |
852 | struct acpi_battery *battery = seq->private; | |
853 | ||
854 | if (result) | |
855 | goto end; | |
856 | ||
857 | seq_printf(seq, "present: %s\n", | |
858 | acpi_battery_present(battery) ? "yes" : "no"); | |
859 | if (!acpi_battery_present(battery)) | |
860 | goto end; | |
861 | ||
862 | seq_printf(seq, "capacity state: %s\n", | |
863 | (battery->state & 0x04) ? "critical" : "ok"); | |
864 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
865 | seq_printf(seq, | |
866 | "charging state: charging/discharging\n"); | |
867 | else if (battery->state & 0x01) | |
868 | seq_printf(seq, "charging state: discharging\n"); | |
869 | else if (battery->state & 0x02) | |
870 | seq_printf(seq, "charging state: charging\n"); | |
871 | else | |
872 | seq_printf(seq, "charging state: charged\n"); | |
873 | ||
874 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
875 | seq_printf(seq, "present rate: unknown\n"); | |
876 | else | |
877 | seq_printf(seq, "present rate: %d %s\n", | |
878 | battery->rate_now, acpi_battery_units(battery)); | |
879 | ||
880 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
881 | seq_printf(seq, "remaining capacity: unknown\n"); | |
882 | else | |
883 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
884 | battery->capacity_now, acpi_battery_units(battery)); | |
885 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
886 | seq_printf(seq, "present voltage: unknown\n"); | |
887 | else | |
888 | seq_printf(seq, "present voltage: %d mV\n", | |
889 | battery->voltage_now); | |
890 | end: | |
891 | if (result) | |
892 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
893 | ||
894 | return result; | |
895 | } | |
896 | ||
897 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) | |
898 | { | |
899 | struct acpi_battery *battery = seq->private; | |
900 | ||
901 | if (result) | |
902 | goto end; | |
903 | ||
904 | if (!acpi_battery_present(battery)) { | |
905 | seq_printf(seq, "present: no\n"); | |
906 | goto end; | |
907 | } | |
908 | seq_printf(seq, "alarm: "); | |
909 | if (!battery->alarm) | |
910 | seq_printf(seq, "unsupported\n"); | |
911 | else | |
912 | seq_printf(seq, "%u %sh\n", battery->alarm, | |
913 | acpi_battery_units(battery)); | |
914 | end: | |
915 | if (result) | |
916 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
917 | return result; | |
918 | } | |
919 | ||
920 | static ssize_t acpi_battery_write_alarm(struct file *file, | |
921 | const char __user * buffer, | |
922 | size_t count, loff_t * ppos) | |
923 | { | |
924 | int result = 0; | |
925 | char alarm_string[12] = { '\0' }; | |
926 | struct seq_file *m = file->private_data; | |
927 | struct acpi_battery *battery = m->private; | |
928 | ||
929 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
930 | return -EINVAL; | |
931 | if (!acpi_battery_present(battery)) { | |
932 | result = -ENODEV; | |
933 | goto end; | |
934 | } | |
935 | if (copy_from_user(alarm_string, buffer, count)) { | |
936 | result = -EFAULT; | |
937 | goto end; | |
938 | } | |
939 | alarm_string[count] = '\0'; | |
3d915894 CJ |
940 | if (kstrtoint(alarm_string, 0, &battery->alarm)) { |
941 | result = -EINVAL; | |
942 | goto end; | |
943 | } | |
3a670cc7 LT |
944 | result = acpi_battery_set_alarm(battery); |
945 | end: | |
946 | if (!result) | |
947 | return count; | |
948 | return result; | |
949 | } | |
950 | ||
951 | typedef int(*print_func)(struct seq_file *seq, int result); | |
952 | ||
953 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
954 | acpi_battery_print_info, | |
955 | acpi_battery_print_state, | |
956 | acpi_battery_print_alarm, | |
957 | }; | |
958 | ||
959 | static int acpi_battery_read(int fid, struct seq_file *seq) | |
960 | { | |
961 | struct acpi_battery *battery = seq->private; | |
9e50bc14 | 962 | int result = acpi_battery_update(battery, false); |
3a670cc7 LT |
963 | return acpi_print_funcs[fid](seq, result); |
964 | } | |
965 | ||
966 | #define DECLARE_FILE_FUNCTIONS(_name) \ | |
967 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
968 | { \ | |
969 | return acpi_battery_read(_name##_tag, seq); \ | |
970 | } \ | |
971 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
972 | { \ | |
973 | return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \ | |
974 | } | |
975 | ||
976 | DECLARE_FILE_FUNCTIONS(info); | |
977 | DECLARE_FILE_FUNCTIONS(state); | |
978 | DECLARE_FILE_FUNCTIONS(alarm); | |
979 | ||
980 | #undef DECLARE_FILE_FUNCTIONS | |
981 | ||
982 | #define FILE_DESCRIPTION_RO(_name) \ | |
983 | { \ | |
984 | .name = __stringify(_name), \ | |
985 | .mode = S_IRUGO, \ | |
986 | .ops = { \ | |
987 | .open = acpi_battery_##_name##_open_fs, \ | |
988 | .read = seq_read, \ | |
989 | .llseek = seq_lseek, \ | |
990 | .release = single_release, \ | |
991 | .owner = THIS_MODULE, \ | |
992 | }, \ | |
993 | } | |
994 | ||
995 | #define FILE_DESCRIPTION_RW(_name) \ | |
996 | { \ | |
997 | .name = __stringify(_name), \ | |
998 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
999 | .ops = { \ | |
1000 | .open = acpi_battery_##_name##_open_fs, \ | |
1001 | .read = seq_read, \ | |
1002 | .llseek = seq_lseek, \ | |
1003 | .write = acpi_battery_write_##_name, \ | |
1004 | .release = single_release, \ | |
1005 | .owner = THIS_MODULE, \ | |
1006 | }, \ | |
1007 | } | |
1008 | ||
1009 | static const struct battery_file { | |
1010 | struct file_operations ops; | |
1011 | umode_t mode; | |
1012 | const char *name; | |
1013 | } acpi_battery_file[] = { | |
1014 | FILE_DESCRIPTION_RO(info), | |
1015 | FILE_DESCRIPTION_RO(state), | |
1016 | FILE_DESCRIPTION_RW(alarm), | |
1017 | }; | |
1018 | ||
1019 | #undef FILE_DESCRIPTION_RO | |
1020 | #undef FILE_DESCRIPTION_RW | |
1021 | ||
1022 | static int acpi_battery_add_fs(struct acpi_device *device) | |
1023 | { | |
1024 | struct proc_dir_entry *entry = NULL; | |
1025 | int i; | |
1026 | ||
1027 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," | |
1028 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1029 | if (!acpi_device_dir(device)) { | |
1030 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
1031 | acpi_battery_dir); | |
1032 | if (!acpi_device_dir(device)) | |
1033 | return -ENODEV; | |
1034 | } | |
1035 | ||
1036 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { | |
1037 | entry = proc_create_data(acpi_battery_file[i].name, | |
1038 | acpi_battery_file[i].mode, | |
1039 | acpi_device_dir(device), | |
1040 | &acpi_battery_file[i].ops, | |
1041 | acpi_driver_data(device)); | |
1042 | if (!entry) | |
1043 | return -ENODEV; | |
1044 | } | |
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static void acpi_battery_remove_fs(struct acpi_device *device) | |
1049 | { | |
1050 | int i; | |
1051 | if (!acpi_device_dir(device)) | |
1052 | return; | |
1053 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
1054 | remove_proc_entry(acpi_battery_file[i].name, | |
1055 | acpi_device_dir(device)); | |
1056 | ||
1057 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
1058 | acpi_device_dir(device) = NULL; | |
1059 | } | |
1060 | ||
1061 | #endif | |
1062 | ||
1da177e4 LT |
1063 | /* -------------------------------------------------------------------------- |
1064 | Driver Interface | |
1065 | -------------------------------------------------------------------------- */ | |
1066 | ||
d9406691 | 1067 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1068 | { |
d9406691 | 1069 | struct acpi_battery *battery = acpi_driver_data(device); |
297d716f | 1070 | struct power_supply *old; |
d9406691 | 1071 | |
1da177e4 | 1072 | if (!battery) |
d550d98d | 1073 | return; |
297d716f | 1074 | old = battery->bat; |
f43691c6 AM |
1075 | /* |
1076 | * On Acer Aspire V5-573G notifications are sometimes triggered too | |
1077 | * early. For example, when AC is unplugged and notification is | |
1078 | * triggered, battery state is still reported as "Full", and changes to | |
1079 | * "Discharging" only after short delay, without any notification. | |
1080 | */ | |
1081 | if (battery_notification_delay_ms > 0) | |
1082 | msleep(battery_notification_delay_ms); | |
da8aeb92 RW |
1083 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1084 | acpi_battery_refresh(battery); | |
9e50bc14 | 1085 | acpi_battery_update(battery, false); |
f1d4661a | 1086 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1087 | dev_name(&device->dev), event, |
9ea7d575 | 1088 | acpi_battery_present(battery)); |
411e0f77 | 1089 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1090 | /* acpi_battery_update could remove power_supply object */ |
297d716f KK |
1091 | if (old && battery->bat) |
1092 | power_supply_changed(battery->bat); | |
1da177e4 LT |
1093 | } |
1094 | ||
25be5821 KM |
1095 | static int battery_notify(struct notifier_block *nb, |
1096 | unsigned long mode, void *_unused) | |
1097 | { | |
1098 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1099 | pm_nb); | |
9e50bc14 LT |
1100 | int result; |
1101 | ||
25be5821 | 1102 | switch (mode) { |
d5a5911b | 1103 | case PM_POST_HIBERNATION: |
25be5821 | 1104 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1105 | if (!acpi_battery_present(battery)) |
1106 | return 0; | |
1107 | ||
31f7dc79 | 1108 | if (!battery->bat) { |
9e50bc14 LT |
1109 | result = acpi_battery_get_info(battery); |
1110 | if (result) | |
1111 | return result; | |
1112 | ||
1113 | result = sysfs_add_battery(battery); | |
1114 | if (result) | |
1115 | return result; | |
1116 | } else | |
1117 | acpi_battery_refresh(battery); | |
1118 | ||
1119 | acpi_battery_init_alarm(battery); | |
1120 | acpi_battery_get_state(battery); | |
25be5821 KM |
1121 | break; |
1122 | } | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
048d16da MK |
1127 | static int __init |
1128 | battery_bix_broken_package_quirk(const struct dmi_system_id *d) | |
3f5dc08f AM |
1129 | { |
1130 | battery_bix_broken_package = 1; | |
1131 | return 0; | |
1132 | } | |
1133 | ||
048d16da MK |
1134 | static int __init |
1135 | battery_notification_delay_quirk(const struct dmi_system_id *d) | |
f43691c6 AM |
1136 | { |
1137 | battery_notification_delay_ms = 1000; | |
1138 | return 0; | |
1139 | } | |
1140 | ||
048d16da | 1141 | static const struct dmi_system_id bat_dmi_table[] __initconst = { |
a90b4038 | 1142 | { |
3f5dc08f | 1143 | .callback = battery_bix_broken_package_quirk, |
a90b4038 LT |
1144 | .ident = "NEC LZ750/LS", |
1145 | .matches = { | |
1146 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1147 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1148 | }, | |
1149 | }, | |
f43691c6 AM |
1150 | { |
1151 | .callback = battery_notification_delay_quirk, | |
1152 | .ident = "Acer Aspire V5-573G", | |
1153 | .matches = { | |
1154 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1155 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), | |
1156 | }, | |
1157 | }, | |
a90b4038 LT |
1158 | {}, |
1159 | }; | |
1160 | ||
75646e75 LT |
1161 | /* |
1162 | * Some machines'(E,G Lenovo Z480) ECs are not stable | |
1163 | * during boot up and this causes battery driver fails to be | |
1164 | * probed due to failure of getting battery information | |
1165 | * from EC sometimes. After several retries, the operation | |
1166 | * may work. So add retry code here and 20ms sleep between | |
1167 | * every retries. | |
1168 | */ | |
1169 | static int acpi_battery_update_retry(struct acpi_battery *battery) | |
1170 | { | |
1171 | int retry, ret; | |
1172 | ||
1173 | for (retry = 5; retry; retry--) { | |
1174 | ret = acpi_battery_update(battery, false); | |
1175 | if (!ret) | |
1176 | break; | |
1177 | ||
1178 | msleep(20); | |
1179 | } | |
1180 | return ret; | |
1181 | } | |
1182 | ||
4be44fcd | 1183 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1184 | { |
4be44fcd | 1185 | int result = 0; |
4be44fcd | 1186 | struct acpi_battery *battery = NULL; |
952c63e9 | 1187 | |
1da177e4 | 1188 | if (!device) |
d550d98d | 1189 | return -EINVAL; |
40e7fcb1 LT |
1190 | |
1191 | if (device->dep_unmet) | |
1192 | return -EPROBE_DEFER; | |
1193 | ||
36bcbec7 | 1194 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1195 | if (!battery) |
d550d98d | 1196 | return -ENOMEM; |
145def84 | 1197 | battery->device = device; |
1da177e4 LT |
1198 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1199 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1200 | device->driver_data = battery; |
038fdea2 | 1201 | mutex_init(&battery->lock); |
69d94ec6 | 1202 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1203 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1204 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
75646e75 LT |
1205 | |
1206 | result = acpi_battery_update_retry(battery); | |
eb03cb02 SH |
1207 | if (result) |
1208 | goto fail; | |
75646e75 | 1209 | |
3a670cc7 LT |
1210 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1211 | result = acpi_battery_add_fs(device); | |
1212 | #endif | |
1213 | if (result) { | |
1214 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1215 | acpi_battery_remove_fs(device); | |
1216 | #endif | |
1217 | goto fail; | |
1218 | } | |
25be5821 | 1219 | |
e80bba4b SH |
1220 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1221 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1222 | device->status.battery_present ? "present" : "absent"); | |
1223 | ||
25be5821 KM |
1224 | battery->pm_nb.notifier_call = battery_notify; |
1225 | register_pm_notifier(&battery->pm_nb); | |
1226 | ||
e0d1f09e ZR |
1227 | device_init_wakeup(&device->dev, 1); |
1228 | ||
d550d98d | 1229 | return result; |
e80bba4b SH |
1230 | |
1231 | fail: | |
1232 | sysfs_remove_battery(battery); | |
1233 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1234 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1235 | kfree(battery); |
1236 | return result; | |
1da177e4 LT |
1237 | } |
1238 | ||
51fac838 | 1239 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1240 | { |
4be44fcd | 1241 | struct acpi_battery *battery = NULL; |
1da177e4 | 1242 | |
1da177e4 | 1243 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1244 | return -EINVAL; |
e0d1f09e | 1245 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1246 | battery = acpi_driver_data(device); |
25be5821 | 1247 | unregister_pm_notifier(&battery->pm_nb); |
3a670cc7 LT |
1248 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1249 | acpi_battery_remove_fs(device); | |
1250 | #endif | |
508df92d | 1251 | sysfs_remove_battery(battery); |
038fdea2 | 1252 | mutex_destroy(&battery->lock); |
69d94ec6 | 1253 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1254 | kfree(battery); |
d550d98d | 1255 | return 0; |
1da177e4 LT |
1256 | } |
1257 | ||
90692404 | 1258 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1259 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1260 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1261 | { |
1262 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1263 | |
1264 | if (!dev) | |
34c4415a | 1265 | return -EINVAL; |
a6f50dc8 RW |
1266 | |
1267 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1268 | if (!battery) | |
1269 | return -EINVAL; | |
1270 | ||
f1d4661a | 1271 | battery->update_time = 0; |
9e50bc14 | 1272 | acpi_battery_update(battery, true); |
b6ce4083 | 1273 | return 0; |
34c4415a | 1274 | } |
7f6895c6 SK |
1275 | #else |
1276 | #define acpi_battery_resume NULL | |
90692404 | 1277 | #endif |
34c4415a | 1278 | |
a6f50dc8 RW |
1279 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1280 | ||
aa650bbd AS |
1281 | static struct acpi_driver acpi_battery_driver = { |
1282 | .name = "battery", | |
1283 | .class = ACPI_BATTERY_CLASS, | |
1284 | .ids = battery_device_ids, | |
d9406691 | 1285 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1286 | .ops = { |
1287 | .add = acpi_battery_add, | |
aa650bbd | 1288 | .remove = acpi_battery_remove, |
d9406691 | 1289 | .notify = acpi_battery_notify, |
aa650bbd | 1290 | }, |
a6f50dc8 | 1291 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1292 | }; |
1293 | ||
b0cbc861 | 1294 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1295 | { |
479faaf0 LH |
1296 | int result; |
1297 | ||
3f5dc08f | 1298 | dmi_check_system(bat_dmi_table); |
479faaf0 | 1299 | |
3a670cc7 LT |
1300 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1301 | acpi_battery_dir = acpi_lock_battery_dir(); | |
1302 | if (!acpi_battery_dir) | |
1303 | return; | |
1304 | #endif | |
479faaf0 | 1305 | result = acpi_bus_register_driver(&acpi_battery_driver); |
3a670cc7 | 1306 | #ifdef CONFIG_ACPI_PROCFS_POWER |
479faaf0 | 1307 | if (result < 0) |
3a670cc7 LT |
1308 | acpi_unlock_battery_dir(acpi_battery_dir); |
1309 | #endif | |
0f66af53 AV |
1310 | } |
1311 | ||
1312 | static int __init acpi_battery_init(void) | |
1313 | { | |
e234b074 LH |
1314 | if (acpi_disabled) |
1315 | return -ENODEV; | |
1316 | ||
eca21d91 | 1317 | async_cookie = async_schedule(acpi_battery_init_async, NULL); |
d550d98d | 1318 | return 0; |
1da177e4 LT |
1319 | } |
1320 | ||
4be44fcd | 1321 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1322 | { |
eca21d91 | 1323 | async_synchronize_cookie(async_cookie); |
1da177e4 | 1324 | acpi_bus_unregister_driver(&acpi_battery_driver); |
3a670cc7 LT |
1325 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1326 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1327 | #endif | |
1da177e4 LT |
1328 | } |
1329 | ||
1da177e4 LT |
1330 | module_init(acpi_battery_init); |
1331 | module_exit(acpi_battery_exit); |