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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> |
75646e75 | 38 | #include <linux/delay.h> |
4000e626 | 39 | #include <asm/unaligned.h> |
d7380965 | 40 | |
3a670cc7 LT |
41 | #ifdef CONFIG_ACPI_PROCFS_POWER |
42 | #include <linux/proc_fs.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <asm/uaccess.h> | |
45 | #endif | |
46 | ||
8b48463f | 47 | #include <linux/acpi.h> |
d7380965 AS |
48 | #include <linux/power_supply.h> |
49 | ||
f03be352 AM |
50 | #include "battery.h" |
51 | ||
a192a958 LB |
52 | #define PREFIX "ACPI: " |
53 | ||
1da177e4 LT |
54 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
55 | ||
1da177e4 | 56 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 | 57 | |
ae6f6187 LT |
58 | /* Battery power unit: 0 means mW, 1 means mA */ |
59 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
60 | ||
1ac5aaa6 ZR |
61 | #define ACPI_BATTERY_STATE_DISCHARGING 0x1 |
62 | #define ACPI_BATTERY_STATE_CHARGING 0x2 | |
63 | #define ACPI_BATTERY_STATE_CRITICAL 0x4 | |
64 | ||
1da177e4 | 65 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 66 | |
f52fd66d | 67 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 68 | |
f52fd66d | 69 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 70 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 71 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
72 | MODULE_LICENSE("GPL"); |
73 | ||
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; |
d7380965 | 121 | struct power_supply bat; |
f1d4661a | 122 | struct acpi_device *device; |
25be5821 | 123 | struct notifier_block pm_nb; |
f1d4661a | 124 | unsigned long update_time; |
016d5baa | 125 | int revision; |
7faa144a | 126 | int rate_now; |
d7380965 AS |
127 | int capacity_now; |
128 | int voltage_now; | |
038fdea2 | 129 | int design_capacity; |
d7380965 | 130 | int full_charge_capacity; |
038fdea2 AS |
131 | int technology; |
132 | int design_voltage; | |
133 | int design_capacity_warning; | |
134 | int design_capacity_low; | |
c67fcd67 AS |
135 | int cycle_count; |
136 | int measurement_accuracy; | |
137 | int max_sampling_time; | |
138 | int min_sampling_time; | |
139 | int max_averaging_interval; | |
140 | int min_averaging_interval; | |
038fdea2 AS |
141 | int capacity_granularity_1; |
142 | int capacity_granularity_2; | |
f1d4661a | 143 | int alarm; |
038fdea2 AS |
144 | char model_number[32]; |
145 | char serial_number[32]; | |
146 | char type[32]; | |
147 | char oem_info[32]; | |
f1d4661a AS |
148 | int state; |
149 | int power_unit; | |
7b3bcc4a | 150 | unsigned long flags; |
1da177e4 LT |
151 | }; |
152 | ||
497888cf | 153 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
d7380965 | 154 | |
efd941f1 | 155 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 156 | { |
78490d82 AS |
157 | return battery->device->status.battery_present; |
158 | } | |
038fdea2 | 159 | |
d7380965 AS |
160 | static int acpi_battery_technology(struct acpi_battery *battery) |
161 | { | |
162 | if (!strcasecmp("NiCd", battery->type)) | |
163 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
164 | if (!strcasecmp("NiMH", battery->type)) | |
165 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
166 | if (!strcasecmp("LION", battery->type)) | |
167 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 168 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 169 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
170 | if (!strcasecmp("LiP", battery->type)) |
171 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
172 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
173 | } | |
174 | ||
9104476e | 175 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 176 | |
56f382a0 RH |
177 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
178 | { | |
1ac5aaa6 | 179 | /* charging, discharging or critical low */ |
56f382a0 RH |
180 | if (battery->state != 0) |
181 | return 0; | |
182 | ||
183 | /* battery not reporting charge */ | |
184 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
185 | battery->capacity_now == 0) | |
186 | return 0; | |
187 | ||
188 | /* good batteries update full_charge as the batteries degrade */ | |
189 | if (battery->full_charge_capacity == battery->capacity_now) | |
190 | return 1; | |
191 | ||
192 | /* fallback to using design values for broken batteries */ | |
193 | if (battery->design_capacity == battery->capacity_now) | |
194 | return 1; | |
195 | ||
196 | /* we don't do any sort of metric based on percentages */ | |
197 | return 0; | |
198 | } | |
199 | ||
d7380965 AS |
200 | static int acpi_battery_get_property(struct power_supply *psy, |
201 | enum power_supply_property psp, | |
202 | union power_supply_propval *val) | |
203 | { | |
a1b4bd69 | 204 | int ret = 0; |
d7380965 AS |
205 | struct acpi_battery *battery = to_acpi_battery(psy); |
206 | ||
9104476e AS |
207 | if (acpi_battery_present(battery)) { |
208 | /* run battery update only if it is present */ | |
209 | acpi_battery_get_state(battery); | |
210 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
211 | return -ENODEV; |
212 | switch (psp) { | |
213 | case POWER_SUPPLY_PROP_STATUS: | |
1ac5aaa6 | 214 | if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) |
d7380965 | 215 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
1ac5aaa6 | 216 | else if (battery->state & ACPI_BATTERY_STATE_CHARGING) |
d7380965 | 217 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
56f382a0 | 218 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 219 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
220 | else |
221 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
222 | break; |
223 | case POWER_SUPPLY_PROP_PRESENT: | |
224 | val->intval = acpi_battery_present(battery); | |
225 | break; | |
226 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
227 | val->intval = acpi_battery_technology(battery); | |
228 | break; | |
c67fcd67 AS |
229 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
230 | val->intval = battery->cycle_count; | |
231 | break; | |
d7380965 | 232 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
233 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
234 | ret = -ENODEV; | |
235 | else | |
236 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
237 | break; |
238 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
239 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
240 | ret = -ENODEV; | |
241 | else | |
242 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
243 | break; |
244 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 245 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
246 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
247 | ret = -ENODEV; | |
248 | else | |
249 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
250 | break; |
251 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
252 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
253 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
254 | ret = -ENODEV; | |
255 | else | |
256 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
257 | break; |
258 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
259 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
260 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
261 | ret = -ENODEV; | |
262 | else | |
263 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
264 | break; |
265 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
266 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
267 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
268 | ret = -ENODEV; | |
269 | else | |
270 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 271 | break; |
a58e1150 | 272 | case POWER_SUPPLY_PROP_CAPACITY: |
273 | if (battery->capacity_now && battery->full_charge_capacity) | |
274 | val->intval = battery->capacity_now * 100/ | |
275 | battery->full_charge_capacity; | |
276 | else | |
277 | val->intval = 0; | |
278 | break; | |
1ac5aaa6 ZR |
279 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
280 | if (battery->state & ACPI_BATTERY_STATE_CRITICAL) | |
281 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
282 | else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
283 | (battery->capacity_now <= battery->alarm)) | |
284 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
285 | else if (acpi_battery_is_charged(battery)) | |
286 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
287 | else | |
288 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
289 | break; | |
d7380965 AS |
290 | case POWER_SUPPLY_PROP_MODEL_NAME: |
291 | val->strval = battery->model_number; | |
292 | break; | |
293 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
294 | val->strval = battery->oem_info; | |
295 | break; | |
7c2670bb | 296 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
297 | val->strval = battery->serial_number; | |
298 | break; | |
d7380965 | 299 | default: |
a1b4bd69 | 300 | ret = -EINVAL; |
d7380965 | 301 | } |
a1b4bd69 | 302 | return ret; |
d7380965 AS |
303 | } |
304 | ||
305 | static enum power_supply_property charge_battery_props[] = { | |
306 | POWER_SUPPLY_PROP_STATUS, | |
307 | POWER_SUPPLY_PROP_PRESENT, | |
308 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 309 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
310 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
311 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
312 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
313 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
314 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
315 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 316 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 317 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
318 | POWER_SUPPLY_PROP_MODEL_NAME, |
319 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 320 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
321 | }; |
322 | ||
323 | static enum power_supply_property energy_battery_props[] = { | |
324 | POWER_SUPPLY_PROP_STATUS, | |
325 | POWER_SUPPLY_PROP_PRESENT, | |
326 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 327 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
328 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
329 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 330 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
331 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
332 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
333 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 334 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 335 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
336 | POWER_SUPPLY_PROP_MODEL_NAME, |
337 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 338 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
339 | }; |
340 | ||
3a670cc7 LT |
341 | #ifdef CONFIG_ACPI_PROCFS_POWER |
342 | inline char *acpi_battery_units(struct acpi_battery *battery) | |
343 | { | |
344 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? | |
345 | "mA" : "mW"; | |
346 | } | |
347 | #endif | |
348 | ||
78490d82 AS |
349 | /* -------------------------------------------------------------------------- |
350 | Battery Management | |
351 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
352 | struct acpi_offsets { |
353 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
354 | u8 mode; /* int or string? */ | |
355 | }; | |
b6ce4083 | 356 | |
038fdea2 AS |
357 | static struct acpi_offsets state_offsets[] = { |
358 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 359 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
360 | {offsetof(struct acpi_battery, capacity_now), 0}, |
361 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 362 | }; |
b6ce4083 | 363 | |
038fdea2 AS |
364 | static struct acpi_offsets info_offsets[] = { |
365 | {offsetof(struct acpi_battery, power_unit), 0}, | |
366 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 367 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
368 | {offsetof(struct acpi_battery, technology), 0}, |
369 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
370 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
371 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
372 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
373 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
374 | {offsetof(struct acpi_battery, model_number), 1}, | |
375 | {offsetof(struct acpi_battery, serial_number), 1}, | |
376 | {offsetof(struct acpi_battery, type), 1}, | |
377 | {offsetof(struct acpi_battery, oem_info), 1}, | |
378 | }; | |
b6ce4083 | 379 | |
c67fcd67 | 380 | static struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 381 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
382 | {offsetof(struct acpi_battery, power_unit), 0}, |
383 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
384 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
385 | {offsetof(struct acpi_battery, technology), 0}, | |
386 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
387 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
388 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
389 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
390 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
391 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
392 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
393 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
394 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
395 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
396 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
397 | {offsetof(struct acpi_battery, model_number), 1}, | |
398 | {offsetof(struct acpi_battery, serial_number), 1}, | |
399 | {offsetof(struct acpi_battery, type), 1}, | |
400 | {offsetof(struct acpi_battery, oem_info), 1}, | |
401 | }; | |
402 | ||
038fdea2 AS |
403 | static int extract_package(struct acpi_battery *battery, |
404 | union acpi_object *package, | |
405 | struct acpi_offsets *offsets, int num) | |
406 | { | |
106449e8 | 407 | int i; |
038fdea2 AS |
408 | union acpi_object *element; |
409 | if (package->type != ACPI_TYPE_PACKAGE) | |
410 | return -EFAULT; | |
411 | for (i = 0; i < num; ++i) { | |
412 | if (package->package.count <= i) | |
413 | return -EFAULT; | |
414 | element = &package->package.elements[i]; | |
415 | if (offsets[i].mode) { | |
106449e8 AS |
416 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
417 | if (element->type == ACPI_TYPE_STRING || | |
418 | element->type == ACPI_TYPE_BUFFER) | |
419 | strncpy(ptr, element->string.pointer, 32); | |
420 | else if (element->type == ACPI_TYPE_INTEGER) { | |
421 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
422 | sizeof(u64)); |
423 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
424 | } else |
425 | *ptr = 0; /* don't have value */ | |
038fdea2 | 426 | } else { |
b8a1bdb1 AS |
427 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
428 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
429 | element->integer.value : -1; | |
038fdea2 | 430 | } |
b6ce4083 | 431 | } |
b6ce4083 VL |
432 | return 0; |
433 | } | |
434 | ||
435 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
436 | { | |
aa650bbd | 437 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
438 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
439 | return -ENODEV; | |
440 | } | |
aa650bbd | 441 | return 0; |
b6ce4083 VL |
442 | } |
443 | ||
444 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 445 | { |
aa650bbd | 446 | int result = -EFAULT; |
4be44fcd | 447 | acpi_status status = 0; |
0f4c6547 | 448 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? |
c67fcd67 AS |
449 | "_BIX" : "_BIF"; |
450 | ||
4be44fcd | 451 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 452 | |
b6ce4083 VL |
453 | if (!acpi_battery_present(battery)) |
454 | return 0; | |
038fdea2 | 455 | mutex_lock(&battery->lock); |
c67fcd67 AS |
456 | status = acpi_evaluate_object(battery->device->handle, name, |
457 | NULL, &buffer); | |
038fdea2 | 458 | mutex_unlock(&battery->lock); |
aa650bbd | 459 | |
1da177e4 | 460 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 461 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 462 | return -ENODEV; |
1da177e4 | 463 | } |
a90b4038 LT |
464 | |
465 | if (battery_bix_broken_package) | |
466 | result = extract_package(battery, buffer.pointer, | |
467 | extended_info_offsets + 1, | |
468 | ARRAY_SIZE(extended_info_offsets) - 1); | |
469 | else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) | |
c67fcd67 AS |
470 | result = extract_package(battery, buffer.pointer, |
471 | extended_info_offsets, | |
472 | ARRAY_SIZE(extended_info_offsets)); | |
473 | else | |
474 | result = extract_package(battery, buffer.pointer, | |
475 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 476 | kfree(buffer.pointer); |
557d5868 ZR |
477 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
478 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
479 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
480 | battery->power_unit && battery->design_voltage) { | |
481 | battery->design_capacity = battery->design_capacity * | |
482 | 10000 / battery->design_voltage; | |
483 | battery->full_charge_capacity = battery->full_charge_capacity * | |
484 | 10000 / battery->design_voltage; | |
485 | battery->design_capacity_warning = | |
486 | battery->design_capacity_warning * | |
487 | 10000 / battery->design_voltage; | |
488 | /* Curiously, design_capacity_low, unlike the rest of them, | |
489 | is correct. */ | |
490 | /* capacity_granularity_* equal 1 on the systems tested, so | |
491 | it's impossible to tell if they would need an adjustment | |
492 | or not if their values were higher. */ | |
493 | } | |
d550d98d | 494 | return result; |
1da177e4 LT |
495 | } |
496 | ||
b6ce4083 | 497 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 498 | { |
4be44fcd LB |
499 | int result = 0; |
500 | acpi_status status = 0; | |
501 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 502 | |
b6ce4083 VL |
503 | if (!acpi_battery_present(battery)) |
504 | return 0; | |
1da177e4 | 505 | |
f1d4661a AS |
506 | if (battery->update_time && |
507 | time_before(jiffies, battery->update_time + | |
508 | msecs_to_jiffies(cache_time))) | |
509 | return 0; | |
510 | ||
038fdea2 | 511 | mutex_lock(&battery->lock); |
f1d4661a | 512 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
513 | NULL, &buffer); |
514 | mutex_unlock(&battery->lock); | |
5b31d895 | 515 | |
1da177e4 | 516 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 517 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 518 | return -ENODEV; |
1da177e4 | 519 | } |
aa650bbd | 520 | |
038fdea2 AS |
521 | result = extract_package(battery, buffer.pointer, |
522 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 523 | battery->update_time = jiffies; |
78490d82 | 524 | kfree(buffer.pointer); |
bc76f90b | 525 | |
55003b21 LT |
526 | /* For buggy DSDTs that report negative 16-bit values for either |
527 | * charging or discharging current and/or report 0 as 65536 | |
528 | * due to bad math. | |
529 | */ | |
530 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
531 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
532 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 533 | battery->rate_now = abs((s16)battery->rate_now); |
55003b21 LT |
534 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
535 | " invalid.\n"); | |
536 | } | |
bc76f90b | 537 | |
232de514 JG |
538 | /* |
539 | * When fully charged, some batteries wrongly report | |
540 | * capacity_now = design_capacity instead of = full_charge_capacity | |
541 | */ | |
542 | if (battery->capacity_now > battery->full_charge_capacity | |
543 | && battery->full_charge_capacity != ACPI_BATTERY_VALUE_UNKNOWN) { | |
544 | battery->capacity_now = battery->full_charge_capacity; | |
545 | if (battery->capacity_now != battery->design_capacity) | |
546 | printk_once(KERN_WARNING FW_BUG | |
547 | "battery: reported current charge level (%d) " | |
548 | "is higher than reported maximum charge level (%d).\n", | |
549 | battery->capacity_now, battery->full_charge_capacity); | |
550 | } | |
551 | ||
557d5868 ZR |
552 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
553 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
554 | battery->capacity_now = (battery->capacity_now * | |
555 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
556 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
557 | battery->power_unit && battery->design_voltage) { | |
558 | battery->capacity_now = battery->capacity_now * | |
559 | 10000 / battery->design_voltage; | |
560 | } | |
b6ce4083 VL |
561 | return result; |
562 | } | |
1da177e4 | 563 | |
aa650bbd | 564 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 565 | { |
4be44fcd | 566 | acpi_status status = 0; |
1da177e4 | 567 | |
c67fcd67 | 568 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 569 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 570 | return -ENODEV; |
1da177e4 | 571 | |
038fdea2 | 572 | mutex_lock(&battery->lock); |
0db98202 JL |
573 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
574 | battery->alarm); | |
038fdea2 | 575 | mutex_unlock(&battery->lock); |
aa650bbd | 576 | |
1da177e4 | 577 | if (ACPI_FAILURE(status)) |
d550d98d | 578 | return -ENODEV; |
1da177e4 | 579 | |
aa650bbd | 580 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 581 | return 0; |
1da177e4 LT |
582 | } |
583 | ||
b6ce4083 | 584 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 585 | { |
b6ce4083 | 586 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 587 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 588 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 589 | return 0; |
b6ce4083 | 590 | } |
7b3bcc4a | 591 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
592 | if (!battery->alarm) |
593 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 594 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 595 | } |
1da177e4 | 596 | |
508df92d AB |
597 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
598 | struct device_attribute *attr, | |
599 | char *buf) | |
600 | { | |
601 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
602 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
603 | } | |
604 | ||
605 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
606 | struct device_attribute *attr, | |
607 | const char *buf, size_t count) | |
608 | { | |
609 | unsigned long x; | |
610 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 611 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
612 | battery->alarm = x/1000; |
613 | if (acpi_battery_present(battery)) | |
614 | acpi_battery_set_alarm(battery); | |
615 | return count; | |
616 | } | |
617 | ||
618 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 619 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
620 | .show = acpi_battery_alarm_show, |
621 | .store = acpi_battery_alarm_store, | |
622 | }; | |
623 | ||
624 | static int sysfs_add_battery(struct acpi_battery *battery) | |
625 | { | |
626 | int result; | |
627 | ||
ae6f6187 | 628 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
508df92d AB |
629 | battery->bat.properties = charge_battery_props; |
630 | battery->bat.num_properties = | |
631 | ARRAY_SIZE(charge_battery_props); | |
632 | } else { | |
633 | battery->bat.properties = energy_battery_props; | |
634 | battery->bat.num_properties = | |
635 | ARRAY_SIZE(energy_battery_props); | |
636 | } | |
637 | ||
638 | battery->bat.name = acpi_device_bid(battery->device); | |
639 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
640 | battery->bat.get_property = acpi_battery_get_property; | |
641 | ||
e0d1f09e ZR |
642 | result = power_supply_register_no_ws(&battery->device->dev, &battery->bat); |
643 | ||
508df92d AB |
644 | if (result) |
645 | return result; | |
646 | return device_create_file(battery->bat.dev, &alarm_attr); | |
647 | } | |
648 | ||
649 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
650 | { | |
69d94ec6 | 651 | mutex_lock(&battery->sysfs_lock); |
9c921c22 | 652 | if (!battery->bat.dev) { |
69d94ec6 | 653 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 654 | return; |
9c921c22 LT |
655 | } |
656 | ||
508df92d AB |
657 | device_remove_file(battery->bat.dev, &alarm_attr); |
658 | power_supply_unregister(&battery->bat); | |
9104476e | 659 | battery->bat.dev = NULL; |
69d94ec6 | 660 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
661 | } |
662 | ||
4000e626 KI |
663 | static void find_battery(const struct dmi_header *dm, void *private) |
664 | { | |
665 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
666 | /* Note: the hardcoded offsets below have been extracted from | |
667 | the source code of dmidecode. */ | |
668 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
669 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
670 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
671 | if (dm->length >= 18) | |
672 | dmi_capacity *= dmi_data[17]; | |
673 | if (battery->design_capacity * battery->design_voltage / 1000 | |
674 | != dmi_capacity && | |
675 | battery->design_capacity * 10 == dmi_capacity) | |
676 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
677 | &battery->flags); | |
678 | } | |
679 | } | |
680 | ||
557d5868 ZR |
681 | /* |
682 | * According to the ACPI spec, some kinds of primary batteries can | |
683 | * report percentage battery remaining capacity directly to OS. | |
684 | * In this case, it reports the Last Full Charged Capacity == 100 | |
685 | * and BatteryPresentRate == 0xFFFFFFFF. | |
686 | * | |
687 | * Now we found some battery reports percentage remaining capacity | |
688 | * even if it's rechargeable. | |
689 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
690 | * | |
691 | * Handle this correctly so that they won't break userspace. | |
692 | */ | |
7b78622d | 693 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
694 | { |
695 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 696 | return; |
557d5868 | 697 | |
0f4c6547 NM |
698 | if (battery->full_charge_capacity == 100 && |
699 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
700 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
701 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
702 | battery->full_charge_capacity = battery->design_capacity; | |
703 | battery->capacity_now = (battery->capacity_now * | |
704 | battery->full_charge_capacity) / 100; | |
705 | } | |
4000e626 KI |
706 | |
707 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 708 | return; |
4000e626 KI |
709 | |
710 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
711 | const char *s; | |
712 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
713 | if (s && !strnicmp(s, "ThinkPad", 8)) { | |
714 | dmi_walk(find_battery, battery); | |
715 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
716 | &battery->flags) && | |
717 | battery->design_voltage) { | |
718 | battery->design_capacity = | |
719 | battery->design_capacity * | |
720 | 10000 / battery->design_voltage; | |
721 | battery->full_charge_capacity = | |
722 | battery->full_charge_capacity * | |
723 | 10000 / battery->design_voltage; | |
724 | battery->design_capacity_warning = | |
725 | battery->design_capacity_warning * | |
726 | 10000 / battery->design_voltage; | |
727 | battery->capacity_now = battery->capacity_now * | |
728 | 10000 / battery->design_voltage; | |
729 | } | |
730 | } | |
731 | } | |
557d5868 ZR |
732 | } |
733 | ||
9e50bc14 | 734 | static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
b6ce4083 | 735 | { |
50b17851 | 736 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 737 | result = acpi_battery_get_status(battery); |
508df92d | 738 | if (result) |
b6ce4083 | 739 | return result; |
508df92d AB |
740 | if (!acpi_battery_present(battery)) { |
741 | sysfs_remove_battery(battery); | |
97749cd9 | 742 | battery->update_time = 0; |
508df92d | 743 | return 0; |
b6ce4083 | 744 | } |
9e50bc14 LT |
745 | |
746 | if (resume) | |
747 | return 0; | |
748 | ||
50b17851 AS |
749 | if (!battery->update_time || |
750 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
751 | result = acpi_battery_get_info(battery); |
752 | if (result) | |
753 | return result; | |
754 | acpi_battery_init_alarm(battery); | |
755 | } | |
eb03cb02 SH |
756 | if (!battery->bat.dev) { |
757 | result = sysfs_add_battery(battery); | |
758 | if (result) | |
759 | return result; | |
760 | } | |
557d5868 | 761 | result = acpi_battery_get_state(battery); |
e0d1f09e ZR |
762 | if (result) |
763 | return result; | |
7b78622d | 764 | acpi_battery_quirks(battery); |
e0d1f09e ZR |
765 | |
766 | /* | |
767 | * Wakeup the system if battery is critical low | |
768 | * or lower than the alarm level | |
769 | */ | |
770 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
771 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
772 | (battery->capacity_now <= battery->alarm))) | |
773 | pm_wakeup_event(&battery->device->dev, 0); | |
774 | ||
557d5868 | 775 | return result; |
4bd35cdb VL |
776 | } |
777 | ||
da8aeb92 RW |
778 | static void acpi_battery_refresh(struct acpi_battery *battery) |
779 | { | |
c5971456 AW |
780 | int power_unit; |
781 | ||
da8aeb92 RW |
782 | if (!battery->bat.dev) |
783 | return; | |
784 | ||
c5971456 AW |
785 | power_unit = battery->power_unit; |
786 | ||
da8aeb92 | 787 | acpi_battery_get_info(battery); |
c5971456 AW |
788 | |
789 | if (power_unit == battery->power_unit) | |
790 | return; | |
791 | ||
792 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
793 | sysfs_remove_battery(battery); |
794 | sysfs_add_battery(battery); | |
795 | } | |
796 | ||
3a670cc7 LT |
797 | /* -------------------------------------------------------------------------- |
798 | FS Interface (/proc) | |
799 | -------------------------------------------------------------------------- */ | |
800 | ||
801 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
802 | static struct proc_dir_entry *acpi_battery_dir; | |
803 | ||
804 | static int acpi_battery_print_info(struct seq_file *seq, int result) | |
805 | { | |
806 | struct acpi_battery *battery = seq->private; | |
807 | ||
808 | if (result) | |
809 | goto end; | |
810 | ||
811 | seq_printf(seq, "present: %s\n", | |
812 | acpi_battery_present(battery) ? "yes" : "no"); | |
813 | if (!acpi_battery_present(battery)) | |
814 | goto end; | |
815 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
816 | seq_printf(seq, "design capacity: unknown\n"); | |
817 | else | |
818 | seq_printf(seq, "design capacity: %d %sh\n", | |
819 | battery->design_capacity, | |
820 | acpi_battery_units(battery)); | |
821 | ||
822 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
823 | seq_printf(seq, "last full capacity: unknown\n"); | |
824 | else | |
825 | seq_printf(seq, "last full capacity: %d %sh\n", | |
826 | battery->full_charge_capacity, | |
827 | acpi_battery_units(battery)); | |
828 | ||
829 | seq_printf(seq, "battery technology: %srechargeable\n", | |
830 | (!battery->technology)?"non-":""); | |
831 | ||
832 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
833 | seq_printf(seq, "design voltage: unknown\n"); | |
834 | else | |
835 | seq_printf(seq, "design voltage: %d mV\n", | |
836 | battery->design_voltage); | |
837 | seq_printf(seq, "design capacity warning: %d %sh\n", | |
838 | battery->design_capacity_warning, | |
839 | acpi_battery_units(battery)); | |
840 | seq_printf(seq, "design capacity low: %d %sh\n", | |
841 | battery->design_capacity_low, | |
842 | acpi_battery_units(battery)); | |
843 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); | |
844 | seq_printf(seq, "capacity granularity 1: %d %sh\n", | |
845 | battery->capacity_granularity_1, | |
846 | acpi_battery_units(battery)); | |
847 | seq_printf(seq, "capacity granularity 2: %d %sh\n", | |
848 | battery->capacity_granularity_2, | |
849 | acpi_battery_units(battery)); | |
850 | seq_printf(seq, "model number: %s\n", battery->model_number); | |
851 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
852 | seq_printf(seq, "battery type: %s\n", battery->type); | |
853 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
854 | end: | |
855 | if (result) | |
856 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
857 | return result; | |
858 | } | |
859 | ||
860 | static int acpi_battery_print_state(struct seq_file *seq, int result) | |
861 | { | |
862 | struct acpi_battery *battery = seq->private; | |
863 | ||
864 | if (result) | |
865 | goto end; | |
866 | ||
867 | seq_printf(seq, "present: %s\n", | |
868 | acpi_battery_present(battery) ? "yes" : "no"); | |
869 | if (!acpi_battery_present(battery)) | |
870 | goto end; | |
871 | ||
872 | seq_printf(seq, "capacity state: %s\n", | |
873 | (battery->state & 0x04) ? "critical" : "ok"); | |
874 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
875 | seq_printf(seq, | |
876 | "charging state: charging/discharging\n"); | |
877 | else if (battery->state & 0x01) | |
878 | seq_printf(seq, "charging state: discharging\n"); | |
879 | else if (battery->state & 0x02) | |
880 | seq_printf(seq, "charging state: charging\n"); | |
881 | else | |
882 | seq_printf(seq, "charging state: charged\n"); | |
883 | ||
884 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
885 | seq_printf(seq, "present rate: unknown\n"); | |
886 | else | |
887 | seq_printf(seq, "present rate: %d %s\n", | |
888 | battery->rate_now, acpi_battery_units(battery)); | |
889 | ||
890 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
891 | seq_printf(seq, "remaining capacity: unknown\n"); | |
892 | else | |
893 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
894 | battery->capacity_now, acpi_battery_units(battery)); | |
895 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
896 | seq_printf(seq, "present voltage: unknown\n"); | |
897 | else | |
898 | seq_printf(seq, "present voltage: %d mV\n", | |
899 | battery->voltage_now); | |
900 | end: | |
901 | if (result) | |
902 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
903 | ||
904 | return result; | |
905 | } | |
906 | ||
907 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) | |
908 | { | |
909 | struct acpi_battery *battery = seq->private; | |
910 | ||
911 | if (result) | |
912 | goto end; | |
913 | ||
914 | if (!acpi_battery_present(battery)) { | |
915 | seq_printf(seq, "present: no\n"); | |
916 | goto end; | |
917 | } | |
918 | seq_printf(seq, "alarm: "); | |
919 | if (!battery->alarm) | |
920 | seq_printf(seq, "unsupported\n"); | |
921 | else | |
922 | seq_printf(seq, "%u %sh\n", battery->alarm, | |
923 | acpi_battery_units(battery)); | |
924 | end: | |
925 | if (result) | |
926 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
927 | return result; | |
928 | } | |
929 | ||
930 | static ssize_t acpi_battery_write_alarm(struct file *file, | |
931 | const char __user * buffer, | |
932 | size_t count, loff_t * ppos) | |
933 | { | |
934 | int result = 0; | |
935 | char alarm_string[12] = { '\0' }; | |
936 | struct seq_file *m = file->private_data; | |
937 | struct acpi_battery *battery = m->private; | |
938 | ||
939 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
940 | return -EINVAL; | |
941 | if (!acpi_battery_present(battery)) { | |
942 | result = -ENODEV; | |
943 | goto end; | |
944 | } | |
945 | if (copy_from_user(alarm_string, buffer, count)) { | |
946 | result = -EFAULT; | |
947 | goto end; | |
948 | } | |
949 | alarm_string[count] = '\0'; | |
3d915894 CJ |
950 | if (kstrtoint(alarm_string, 0, &battery->alarm)) { |
951 | result = -EINVAL; | |
952 | goto end; | |
953 | } | |
3a670cc7 LT |
954 | result = acpi_battery_set_alarm(battery); |
955 | end: | |
956 | if (!result) | |
957 | return count; | |
958 | return result; | |
959 | } | |
960 | ||
961 | typedef int(*print_func)(struct seq_file *seq, int result); | |
962 | ||
963 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
964 | acpi_battery_print_info, | |
965 | acpi_battery_print_state, | |
966 | acpi_battery_print_alarm, | |
967 | }; | |
968 | ||
969 | static int acpi_battery_read(int fid, struct seq_file *seq) | |
970 | { | |
971 | struct acpi_battery *battery = seq->private; | |
9e50bc14 | 972 | int result = acpi_battery_update(battery, false); |
3a670cc7 LT |
973 | return acpi_print_funcs[fid](seq, result); |
974 | } | |
975 | ||
976 | #define DECLARE_FILE_FUNCTIONS(_name) \ | |
977 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
978 | { \ | |
979 | return acpi_battery_read(_name##_tag, seq); \ | |
980 | } \ | |
981 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
982 | { \ | |
983 | return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \ | |
984 | } | |
985 | ||
986 | DECLARE_FILE_FUNCTIONS(info); | |
987 | DECLARE_FILE_FUNCTIONS(state); | |
988 | DECLARE_FILE_FUNCTIONS(alarm); | |
989 | ||
990 | #undef DECLARE_FILE_FUNCTIONS | |
991 | ||
992 | #define FILE_DESCRIPTION_RO(_name) \ | |
993 | { \ | |
994 | .name = __stringify(_name), \ | |
995 | .mode = S_IRUGO, \ | |
996 | .ops = { \ | |
997 | .open = acpi_battery_##_name##_open_fs, \ | |
998 | .read = seq_read, \ | |
999 | .llseek = seq_lseek, \ | |
1000 | .release = single_release, \ | |
1001 | .owner = THIS_MODULE, \ | |
1002 | }, \ | |
1003 | } | |
1004 | ||
1005 | #define FILE_DESCRIPTION_RW(_name) \ | |
1006 | { \ | |
1007 | .name = __stringify(_name), \ | |
1008 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
1009 | .ops = { \ | |
1010 | .open = acpi_battery_##_name##_open_fs, \ | |
1011 | .read = seq_read, \ | |
1012 | .llseek = seq_lseek, \ | |
1013 | .write = acpi_battery_write_##_name, \ | |
1014 | .release = single_release, \ | |
1015 | .owner = THIS_MODULE, \ | |
1016 | }, \ | |
1017 | } | |
1018 | ||
1019 | static const struct battery_file { | |
1020 | struct file_operations ops; | |
1021 | umode_t mode; | |
1022 | const char *name; | |
1023 | } acpi_battery_file[] = { | |
1024 | FILE_DESCRIPTION_RO(info), | |
1025 | FILE_DESCRIPTION_RO(state), | |
1026 | FILE_DESCRIPTION_RW(alarm), | |
1027 | }; | |
1028 | ||
1029 | #undef FILE_DESCRIPTION_RO | |
1030 | #undef FILE_DESCRIPTION_RW | |
1031 | ||
1032 | static int acpi_battery_add_fs(struct acpi_device *device) | |
1033 | { | |
1034 | struct proc_dir_entry *entry = NULL; | |
1035 | int i; | |
1036 | ||
1037 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," | |
1038 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1039 | if (!acpi_device_dir(device)) { | |
1040 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
1041 | acpi_battery_dir); | |
1042 | if (!acpi_device_dir(device)) | |
1043 | return -ENODEV; | |
1044 | } | |
1045 | ||
1046 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { | |
1047 | entry = proc_create_data(acpi_battery_file[i].name, | |
1048 | acpi_battery_file[i].mode, | |
1049 | acpi_device_dir(device), | |
1050 | &acpi_battery_file[i].ops, | |
1051 | acpi_driver_data(device)); | |
1052 | if (!entry) | |
1053 | return -ENODEV; | |
1054 | } | |
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | static void acpi_battery_remove_fs(struct acpi_device *device) | |
1059 | { | |
1060 | int i; | |
1061 | if (!acpi_device_dir(device)) | |
1062 | return; | |
1063 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
1064 | remove_proc_entry(acpi_battery_file[i].name, | |
1065 | acpi_device_dir(device)); | |
1066 | ||
1067 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
1068 | acpi_device_dir(device) = NULL; | |
1069 | } | |
1070 | ||
1071 | #endif | |
1072 | ||
1da177e4 LT |
1073 | /* -------------------------------------------------------------------------- |
1074 | Driver Interface | |
1075 | -------------------------------------------------------------------------- */ | |
1076 | ||
d9406691 | 1077 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1078 | { |
d9406691 | 1079 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 1080 | struct device *old; |
d9406691 | 1081 | |
1da177e4 | 1082 | if (!battery) |
d550d98d | 1083 | return; |
153e500f | 1084 | old = battery->bat.dev; |
f43691c6 AM |
1085 | /* |
1086 | * On Acer Aspire V5-573G notifications are sometimes triggered too | |
1087 | * early. For example, when AC is unplugged and notification is | |
1088 | * triggered, battery state is still reported as "Full", and changes to | |
1089 | * "Discharging" only after short delay, without any notification. | |
1090 | */ | |
1091 | if (battery_notification_delay_ms > 0) | |
1092 | msleep(battery_notification_delay_ms); | |
da8aeb92 RW |
1093 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1094 | acpi_battery_refresh(battery); | |
9e50bc14 | 1095 | acpi_battery_update(battery, false); |
f1d4661a | 1096 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1097 | dev_name(&device->dev), event, |
9ea7d575 | 1098 | acpi_battery_present(battery)); |
411e0f77 | 1099 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1100 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 1101 | if (old && battery->bat.dev) |
f79e1cec | 1102 | power_supply_changed(&battery->bat); |
1da177e4 LT |
1103 | } |
1104 | ||
25be5821 KM |
1105 | static int battery_notify(struct notifier_block *nb, |
1106 | unsigned long mode, void *_unused) | |
1107 | { | |
1108 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1109 | pm_nb); | |
9e50bc14 LT |
1110 | int result; |
1111 | ||
25be5821 | 1112 | switch (mode) { |
d5a5911b | 1113 | case PM_POST_HIBERNATION: |
25be5821 | 1114 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1115 | if (!acpi_battery_present(battery)) |
1116 | return 0; | |
1117 | ||
1118 | if (!battery->bat.dev) { | |
1119 | result = acpi_battery_get_info(battery); | |
1120 | if (result) | |
1121 | return result; | |
1122 | ||
1123 | result = sysfs_add_battery(battery); | |
1124 | if (result) | |
1125 | return result; | |
1126 | } else | |
1127 | acpi_battery_refresh(battery); | |
1128 | ||
1129 | acpi_battery_init_alarm(battery); | |
1130 | acpi_battery_get_state(battery); | |
25be5821 KM |
1131 | break; |
1132 | } | |
1133 | ||
1134 | return 0; | |
1135 | } | |
1136 | ||
3f5dc08f AM |
1137 | static int battery_bix_broken_package_quirk(const struct dmi_system_id *d) |
1138 | { | |
1139 | battery_bix_broken_package = 1; | |
1140 | return 0; | |
1141 | } | |
1142 | ||
f43691c6 AM |
1143 | static int battery_notification_delay_quirk(const struct dmi_system_id *d) |
1144 | { | |
1145 | battery_notification_delay_ms = 1000; | |
1146 | return 0; | |
1147 | } | |
1148 | ||
a90b4038 LT |
1149 | static struct dmi_system_id bat_dmi_table[] = { |
1150 | { | |
3f5dc08f | 1151 | .callback = battery_bix_broken_package_quirk, |
a90b4038 LT |
1152 | .ident = "NEC LZ750/LS", |
1153 | .matches = { | |
1154 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1155 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1156 | }, | |
1157 | }, | |
f43691c6 AM |
1158 | { |
1159 | .callback = battery_notification_delay_quirk, | |
1160 | .ident = "Acer Aspire V5-573G", | |
1161 | .matches = { | |
1162 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1163 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), | |
1164 | }, | |
1165 | }, | |
a90b4038 LT |
1166 | {}, |
1167 | }; | |
1168 | ||
75646e75 LT |
1169 | /* |
1170 | * Some machines'(E,G Lenovo Z480) ECs are not stable | |
1171 | * during boot up and this causes battery driver fails to be | |
1172 | * probed due to failure of getting battery information | |
1173 | * from EC sometimes. After several retries, the operation | |
1174 | * may work. So add retry code here and 20ms sleep between | |
1175 | * every retries. | |
1176 | */ | |
1177 | static int acpi_battery_update_retry(struct acpi_battery *battery) | |
1178 | { | |
1179 | int retry, ret; | |
1180 | ||
1181 | for (retry = 5; retry; retry--) { | |
1182 | ret = acpi_battery_update(battery, false); | |
1183 | if (!ret) | |
1184 | break; | |
1185 | ||
1186 | msleep(20); | |
1187 | } | |
1188 | return ret; | |
1189 | } | |
1190 | ||
4be44fcd | 1191 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1192 | { |
4be44fcd | 1193 | int result = 0; |
4be44fcd | 1194 | struct acpi_battery *battery = NULL; |
952c63e9 | 1195 | |
1da177e4 | 1196 | if (!device) |
d550d98d | 1197 | return -EINVAL; |
36bcbec7 | 1198 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1199 | if (!battery) |
d550d98d | 1200 | return -ENOMEM; |
145def84 | 1201 | battery->device = device; |
1da177e4 LT |
1202 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1203 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1204 | device->driver_data = battery; |
038fdea2 | 1205 | mutex_init(&battery->lock); |
69d94ec6 | 1206 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1207 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1208 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
75646e75 LT |
1209 | |
1210 | result = acpi_battery_update_retry(battery); | |
eb03cb02 SH |
1211 | if (result) |
1212 | goto fail; | |
75646e75 | 1213 | |
3a670cc7 LT |
1214 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1215 | result = acpi_battery_add_fs(device); | |
1216 | #endif | |
1217 | if (result) { | |
1218 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1219 | acpi_battery_remove_fs(device); | |
1220 | #endif | |
1221 | goto fail; | |
1222 | } | |
25be5821 | 1223 | |
e80bba4b SH |
1224 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1225 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1226 | device->status.battery_present ? "present" : "absent"); | |
1227 | ||
25be5821 KM |
1228 | battery->pm_nb.notifier_call = battery_notify; |
1229 | register_pm_notifier(&battery->pm_nb); | |
1230 | ||
e0d1f09e ZR |
1231 | device_init_wakeup(&device->dev, 1); |
1232 | ||
d550d98d | 1233 | return result; |
e80bba4b SH |
1234 | |
1235 | fail: | |
1236 | sysfs_remove_battery(battery); | |
1237 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1238 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1239 | kfree(battery); |
1240 | return result; | |
1da177e4 LT |
1241 | } |
1242 | ||
51fac838 | 1243 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1244 | { |
4be44fcd | 1245 | struct acpi_battery *battery = NULL; |
1da177e4 | 1246 | |
1da177e4 | 1247 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1248 | return -EINVAL; |
e0d1f09e | 1249 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1250 | battery = acpi_driver_data(device); |
25be5821 | 1251 | unregister_pm_notifier(&battery->pm_nb); |
3a670cc7 LT |
1252 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1253 | acpi_battery_remove_fs(device); | |
1254 | #endif | |
508df92d | 1255 | sysfs_remove_battery(battery); |
038fdea2 | 1256 | mutex_destroy(&battery->lock); |
69d94ec6 | 1257 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1258 | kfree(battery); |
d550d98d | 1259 | return 0; |
1da177e4 LT |
1260 | } |
1261 | ||
90692404 | 1262 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1263 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1264 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1265 | { |
1266 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1267 | |
1268 | if (!dev) | |
34c4415a | 1269 | return -EINVAL; |
a6f50dc8 RW |
1270 | |
1271 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1272 | if (!battery) | |
1273 | return -EINVAL; | |
1274 | ||
f1d4661a | 1275 | battery->update_time = 0; |
9e50bc14 | 1276 | acpi_battery_update(battery, true); |
b6ce4083 | 1277 | return 0; |
34c4415a | 1278 | } |
7f6895c6 SK |
1279 | #else |
1280 | #define acpi_battery_resume NULL | |
90692404 | 1281 | #endif |
34c4415a | 1282 | |
a6f50dc8 RW |
1283 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1284 | ||
aa650bbd AS |
1285 | static struct acpi_driver acpi_battery_driver = { |
1286 | .name = "battery", | |
1287 | .class = ACPI_BATTERY_CLASS, | |
1288 | .ids = battery_device_ids, | |
d9406691 | 1289 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1290 | .ops = { |
1291 | .add = acpi_battery_add, | |
aa650bbd | 1292 | .remove = acpi_battery_remove, |
d9406691 | 1293 | .notify = acpi_battery_notify, |
aa650bbd | 1294 | }, |
a6f50dc8 | 1295 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1296 | }; |
1297 | ||
b0cbc861 | 1298 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1299 | { |
4d8316d5 | 1300 | if (acpi_disabled) |
0f66af53 | 1301 | return; |
a90b4038 | 1302 | |
3f5dc08f | 1303 | dmi_check_system(bat_dmi_table); |
3a670cc7 LT |
1304 | |
1305 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1306 | acpi_battery_dir = acpi_lock_battery_dir(); | |
1307 | if (!acpi_battery_dir) | |
1308 | return; | |
1309 | #endif | |
1310 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { | |
1311 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1312 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1313 | #endif | |
1314 | return; | |
1315 | } | |
1316 | return; | |
0f66af53 AV |
1317 | } |
1318 | ||
1319 | static int __init acpi_battery_init(void) | |
1320 | { | |
1321 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 1322 | return 0; |
1da177e4 LT |
1323 | } |
1324 | ||
4be44fcd | 1325 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1326 | { |
1da177e4 | 1327 | acpi_bus_unregister_driver(&acpi_battery_driver); |
3a670cc7 LT |
1328 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1329 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1330 | #endif | |
1da177e4 LT |
1331 | } |
1332 | ||
1da177e4 LT |
1333 | module_init(acpi_battery_init); |
1334 | module_exit(acpi_battery_exit); |