Commit | Line | Data |
---|---|---|
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 | ||
a90b4038 | 73 | static int battery_bix_broken_package; |
f43691c6 | 74 | static int battery_notification_delay_ms; |
f1d4661a AS |
75 | static unsigned int cache_time = 1000; |
76 | module_param(cache_time, uint, 0644); | |
77 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 78 | |
3a670cc7 LT |
79 | #ifdef CONFIG_ACPI_PROCFS_POWER |
80 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); | |
81 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
82 | ||
83 | enum acpi_battery_files { | |
84 | info_tag = 0, | |
85 | state_tag, | |
86 | alarm_tag, | |
87 | ACPI_BATTERY_NUMFILES, | |
88 | }; | |
89 | ||
90 | #endif | |
91 | ||
1ba90e3a TR |
92 | static const struct acpi_device_id battery_device_ids[] = { |
93 | {"PNP0C0A", 0}, | |
94 | {"", 0}, | |
95 | }; | |
1ba90e3a | 96 | |
aa650bbd | 97 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 98 | |
7b3bcc4a AS |
99 | enum { |
100 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 101 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 102 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
103 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
104 | switches between mWh and mAh depending on whether the system | |
105 | is running on battery or not. When mAh is the unit, most | |
106 | reported values are incorrect and need to be adjusted by | |
107 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
108 | Pre-2010 and 2012 models appear to always report in mWh and | |
109 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
110 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
111 | the 2011 models that fixes the issue (tested on x220 with a | |
112 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
113 | available for the 2010 models. */ | |
114 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
7b3bcc4a | 115 | }; |
78490d82 | 116 | |
1da177e4 | 117 | struct acpi_battery { |
038fdea2 | 118 | struct mutex lock; |
69d94ec6 | 119 | struct mutex sysfs_lock; |
d7380965 | 120 | struct power_supply bat; |
f1d4661a | 121 | struct acpi_device *device; |
25be5821 | 122 | struct notifier_block pm_nb; |
f1d4661a | 123 | unsigned long update_time; |
016d5baa | 124 | int revision; |
7faa144a | 125 | int rate_now; |
d7380965 AS |
126 | int capacity_now; |
127 | int voltage_now; | |
038fdea2 | 128 | int design_capacity; |
d7380965 | 129 | int full_charge_capacity; |
038fdea2 AS |
130 | int technology; |
131 | int design_voltage; | |
132 | int design_capacity_warning; | |
133 | int design_capacity_low; | |
c67fcd67 AS |
134 | int cycle_count; |
135 | int measurement_accuracy; | |
136 | int max_sampling_time; | |
137 | int min_sampling_time; | |
138 | int max_averaging_interval; | |
139 | int min_averaging_interval; | |
038fdea2 AS |
140 | int capacity_granularity_1; |
141 | int capacity_granularity_2; | |
f1d4661a | 142 | int alarm; |
038fdea2 AS |
143 | char model_number[32]; |
144 | char serial_number[32]; | |
145 | char type[32]; | |
146 | char oem_info[32]; | |
f1d4661a AS |
147 | int state; |
148 | int power_unit; | |
7b3bcc4a | 149 | unsigned long flags; |
1da177e4 LT |
150 | }; |
151 | ||
497888cf | 152 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
d7380965 | 153 | |
efd941f1 | 154 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 155 | { |
78490d82 AS |
156 | return battery->device->status.battery_present; |
157 | } | |
038fdea2 | 158 | |
d7380965 AS |
159 | static int acpi_battery_technology(struct acpi_battery *battery) |
160 | { | |
161 | if (!strcasecmp("NiCd", battery->type)) | |
162 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
163 | if (!strcasecmp("NiMH", battery->type)) | |
164 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
165 | if (!strcasecmp("LION", battery->type)) | |
166 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 167 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 168 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
169 | if (!strcasecmp("LiP", battery->type)) |
170 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
171 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
172 | } | |
173 | ||
9104476e | 174 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 175 | |
56f382a0 RH |
176 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
177 | { | |
1ac5aaa6 | 178 | /* charging, discharging or critical low */ |
56f382a0 RH |
179 | if (battery->state != 0) |
180 | return 0; | |
181 | ||
182 | /* battery not reporting charge */ | |
183 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
184 | battery->capacity_now == 0) | |
185 | return 0; | |
186 | ||
187 | /* good batteries update full_charge as the batteries degrade */ | |
188 | if (battery->full_charge_capacity == battery->capacity_now) | |
189 | return 1; | |
190 | ||
191 | /* fallback to using design values for broken batteries */ | |
192 | if (battery->design_capacity == battery->capacity_now) | |
193 | return 1; | |
194 | ||
195 | /* we don't do any sort of metric based on percentages */ | |
196 | return 0; | |
197 | } | |
198 | ||
d7380965 AS |
199 | static int acpi_battery_get_property(struct power_supply *psy, |
200 | enum power_supply_property psp, | |
201 | union power_supply_propval *val) | |
202 | { | |
a1b4bd69 | 203 | int ret = 0; |
d7380965 AS |
204 | struct acpi_battery *battery = to_acpi_battery(psy); |
205 | ||
9104476e AS |
206 | if (acpi_battery_present(battery)) { |
207 | /* run battery update only if it is present */ | |
208 | acpi_battery_get_state(battery); | |
209 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
210 | return -ENODEV; |
211 | switch (psp) { | |
212 | case POWER_SUPPLY_PROP_STATUS: | |
1ac5aaa6 | 213 | if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) |
d7380965 | 214 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
1ac5aaa6 | 215 | else if (battery->state & ACPI_BATTERY_STATE_CHARGING) |
d7380965 | 216 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
56f382a0 | 217 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 218 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
219 | else |
220 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
221 | break; |
222 | case POWER_SUPPLY_PROP_PRESENT: | |
223 | val->intval = acpi_battery_present(battery); | |
224 | break; | |
225 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
226 | val->intval = acpi_battery_technology(battery); | |
227 | break; | |
c67fcd67 AS |
228 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
229 | val->intval = battery->cycle_count; | |
230 | break; | |
d7380965 | 231 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
232 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
233 | ret = -ENODEV; | |
234 | else | |
235 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
236 | break; |
237 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
238 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
239 | ret = -ENODEV; | |
240 | else | |
241 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
242 | break; |
243 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 244 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
245 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
246 | ret = -ENODEV; | |
247 | else | |
248 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
249 | break; |
250 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
251 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
252 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
253 | ret = -ENODEV; | |
254 | else | |
255 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
256 | break; |
257 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
258 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
259 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
260 | ret = -ENODEV; | |
261 | else | |
262 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
263 | break; |
264 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
265 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
266 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
267 | ret = -ENODEV; | |
268 | else | |
269 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 270 | break; |
a58e1150 | 271 | case POWER_SUPPLY_PROP_CAPACITY: |
272 | if (battery->capacity_now && battery->full_charge_capacity) | |
273 | val->intval = battery->capacity_now * 100/ | |
274 | battery->full_charge_capacity; | |
275 | else | |
276 | val->intval = 0; | |
277 | break; | |
1ac5aaa6 ZR |
278 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
279 | if (battery->state & ACPI_BATTERY_STATE_CRITICAL) | |
280 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
281 | else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
282 | (battery->capacity_now <= battery->alarm)) | |
283 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
284 | else if (acpi_battery_is_charged(battery)) | |
285 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
286 | else | |
287 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
288 | break; | |
d7380965 AS |
289 | case POWER_SUPPLY_PROP_MODEL_NAME: |
290 | val->strval = battery->model_number; | |
291 | break; | |
292 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
293 | val->strval = battery->oem_info; | |
294 | break; | |
7c2670bb | 295 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
296 | val->strval = battery->serial_number; | |
297 | break; | |
d7380965 | 298 | default: |
a1b4bd69 | 299 | ret = -EINVAL; |
d7380965 | 300 | } |
a1b4bd69 | 301 | return ret; |
d7380965 AS |
302 | } |
303 | ||
304 | static enum power_supply_property charge_battery_props[] = { | |
305 | POWER_SUPPLY_PROP_STATUS, | |
306 | POWER_SUPPLY_PROP_PRESENT, | |
307 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 308 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
309 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
310 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
311 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
312 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
313 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
314 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 315 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 316 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
317 | POWER_SUPPLY_PROP_MODEL_NAME, |
318 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 319 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
320 | }; |
321 | ||
322 | static enum power_supply_property energy_battery_props[] = { | |
323 | POWER_SUPPLY_PROP_STATUS, | |
324 | POWER_SUPPLY_PROP_PRESENT, | |
325 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 326 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
327 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
328 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 329 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
330 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
331 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
332 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 333 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 334 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
335 | POWER_SUPPLY_PROP_MODEL_NAME, |
336 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 337 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
338 | }; |
339 | ||
3a670cc7 LT |
340 | #ifdef CONFIG_ACPI_PROCFS_POWER |
341 | inline char *acpi_battery_units(struct acpi_battery *battery) | |
342 | { | |
343 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? | |
344 | "mA" : "mW"; | |
345 | } | |
346 | #endif | |
347 | ||
78490d82 AS |
348 | /* -------------------------------------------------------------------------- |
349 | Battery Management | |
350 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
351 | struct acpi_offsets { |
352 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
353 | u8 mode; /* int or string? */ | |
354 | }; | |
b6ce4083 | 355 | |
038fdea2 AS |
356 | static struct acpi_offsets state_offsets[] = { |
357 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 358 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
359 | {offsetof(struct acpi_battery, capacity_now), 0}, |
360 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 361 | }; |
b6ce4083 | 362 | |
038fdea2 AS |
363 | static struct acpi_offsets info_offsets[] = { |
364 | {offsetof(struct acpi_battery, power_unit), 0}, | |
365 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 366 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
367 | {offsetof(struct acpi_battery, technology), 0}, |
368 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
369 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
370 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
371 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
372 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
373 | {offsetof(struct acpi_battery, model_number), 1}, | |
374 | {offsetof(struct acpi_battery, serial_number), 1}, | |
375 | {offsetof(struct acpi_battery, type), 1}, | |
376 | {offsetof(struct acpi_battery, oem_info), 1}, | |
377 | }; | |
b6ce4083 | 378 | |
c67fcd67 | 379 | static struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 380 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
381 | {offsetof(struct acpi_battery, power_unit), 0}, |
382 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
383 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
384 | {offsetof(struct acpi_battery, technology), 0}, | |
385 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
386 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
387 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
388 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
389 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
390 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
391 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
392 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
393 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
394 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
395 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
396 | {offsetof(struct acpi_battery, model_number), 1}, | |
397 | {offsetof(struct acpi_battery, serial_number), 1}, | |
398 | {offsetof(struct acpi_battery, type), 1}, | |
399 | {offsetof(struct acpi_battery, oem_info), 1}, | |
400 | }; | |
401 | ||
038fdea2 AS |
402 | static int extract_package(struct acpi_battery *battery, |
403 | union acpi_object *package, | |
404 | struct acpi_offsets *offsets, int num) | |
405 | { | |
106449e8 | 406 | int i; |
038fdea2 AS |
407 | union acpi_object *element; |
408 | if (package->type != ACPI_TYPE_PACKAGE) | |
409 | return -EFAULT; | |
410 | for (i = 0; i < num; ++i) { | |
411 | if (package->package.count <= i) | |
412 | return -EFAULT; | |
413 | element = &package->package.elements[i]; | |
414 | if (offsets[i].mode) { | |
106449e8 AS |
415 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
416 | if (element->type == ACPI_TYPE_STRING || | |
417 | element->type == ACPI_TYPE_BUFFER) | |
418 | strncpy(ptr, element->string.pointer, 32); | |
419 | else if (element->type == ACPI_TYPE_INTEGER) { | |
420 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
421 | sizeof(u64)); |
422 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
423 | } else |
424 | *ptr = 0; /* don't have value */ | |
038fdea2 | 425 | } else { |
b8a1bdb1 AS |
426 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
427 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
428 | element->integer.value : -1; | |
038fdea2 | 429 | } |
b6ce4083 | 430 | } |
b6ce4083 VL |
431 | return 0; |
432 | } | |
433 | ||
434 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
435 | { | |
aa650bbd | 436 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
437 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
438 | return -ENODEV; | |
439 | } | |
aa650bbd | 440 | return 0; |
b6ce4083 VL |
441 | } |
442 | ||
443 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 444 | { |
aa650bbd | 445 | int result = -EFAULT; |
4be44fcd | 446 | acpi_status status = 0; |
0f4c6547 | 447 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? |
c67fcd67 AS |
448 | "_BIX" : "_BIF"; |
449 | ||
4be44fcd | 450 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 451 | |
b6ce4083 VL |
452 | if (!acpi_battery_present(battery)) |
453 | return 0; | |
038fdea2 | 454 | mutex_lock(&battery->lock); |
c67fcd67 AS |
455 | status = acpi_evaluate_object(battery->device->handle, name, |
456 | NULL, &buffer); | |
038fdea2 | 457 | mutex_unlock(&battery->lock); |
aa650bbd | 458 | |
1da177e4 | 459 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 460 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 461 | return -ENODEV; |
1da177e4 | 462 | } |
a90b4038 LT |
463 | |
464 | if (battery_bix_broken_package) | |
465 | result = extract_package(battery, buffer.pointer, | |
466 | extended_info_offsets + 1, | |
467 | ARRAY_SIZE(extended_info_offsets) - 1); | |
468 | else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) | |
c67fcd67 AS |
469 | result = extract_package(battery, buffer.pointer, |
470 | extended_info_offsets, | |
471 | ARRAY_SIZE(extended_info_offsets)); | |
472 | else | |
473 | result = extract_package(battery, buffer.pointer, | |
474 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 475 | kfree(buffer.pointer); |
557d5868 ZR |
476 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
477 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
478 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
479 | battery->power_unit && battery->design_voltage) { | |
480 | battery->design_capacity = battery->design_capacity * | |
481 | 10000 / battery->design_voltage; | |
482 | battery->full_charge_capacity = battery->full_charge_capacity * | |
483 | 10000 / battery->design_voltage; | |
484 | battery->design_capacity_warning = | |
485 | battery->design_capacity_warning * | |
486 | 10000 / battery->design_voltage; | |
487 | /* Curiously, design_capacity_low, unlike the rest of them, | |
488 | is correct. */ | |
489 | /* capacity_granularity_* equal 1 on the systems tested, so | |
490 | it's impossible to tell if they would need an adjustment | |
491 | or not if their values were higher. */ | |
492 | } | |
d550d98d | 493 | return result; |
1da177e4 LT |
494 | } |
495 | ||
b6ce4083 | 496 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 497 | { |
4be44fcd LB |
498 | int result = 0; |
499 | acpi_status status = 0; | |
500 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 501 | |
b6ce4083 VL |
502 | if (!acpi_battery_present(battery)) |
503 | return 0; | |
1da177e4 | 504 | |
f1d4661a AS |
505 | if (battery->update_time && |
506 | time_before(jiffies, battery->update_time + | |
507 | msecs_to_jiffies(cache_time))) | |
508 | return 0; | |
509 | ||
038fdea2 | 510 | mutex_lock(&battery->lock); |
f1d4661a | 511 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
512 | NULL, &buffer); |
513 | mutex_unlock(&battery->lock); | |
5b31d895 | 514 | |
1da177e4 | 515 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 516 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 517 | return -ENODEV; |
1da177e4 | 518 | } |
aa650bbd | 519 | |
038fdea2 AS |
520 | result = extract_package(battery, buffer.pointer, |
521 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 522 | battery->update_time = jiffies; |
78490d82 | 523 | kfree(buffer.pointer); |
bc76f90b | 524 | |
55003b21 LT |
525 | /* For buggy DSDTs that report negative 16-bit values for either |
526 | * charging or discharging current and/or report 0 as 65536 | |
527 | * due to bad math. | |
528 | */ | |
529 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
530 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
531 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 532 | battery->rate_now = abs((s16)battery->rate_now); |
55003b21 LT |
533 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
534 | " invalid.\n"); | |
535 | } | |
bc76f90b | 536 | |
232de514 JG |
537 | /* |
538 | * When fully charged, some batteries wrongly report | |
539 | * capacity_now = design_capacity instead of = full_charge_capacity | |
540 | */ | |
541 | if (battery->capacity_now > battery->full_charge_capacity | |
542 | && battery->full_charge_capacity != ACPI_BATTERY_VALUE_UNKNOWN) { | |
232de514 JG |
543 | if (battery->capacity_now != battery->design_capacity) |
544 | printk_once(KERN_WARNING FW_BUG | |
545 | "battery: reported current charge level (%d) " | |
546 | "is higher than reported maximum charge level (%d).\n", | |
547 | battery->capacity_now, battery->full_charge_capacity); | |
d719870b | 548 | battery->capacity_now = battery->full_charge_capacity; |
232de514 JG |
549 | } |
550 | ||
557d5868 ZR |
551 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
552 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
553 | battery->capacity_now = (battery->capacity_now * | |
554 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
555 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
556 | battery->power_unit && battery->design_voltage) { | |
557 | battery->capacity_now = battery->capacity_now * | |
558 | 10000 / battery->design_voltage; | |
559 | } | |
b6ce4083 VL |
560 | return result; |
561 | } | |
1da177e4 | 562 | |
aa650bbd | 563 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 564 | { |
4be44fcd | 565 | acpi_status status = 0; |
1da177e4 | 566 | |
c67fcd67 | 567 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 568 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 569 | return -ENODEV; |
1da177e4 | 570 | |
038fdea2 | 571 | mutex_lock(&battery->lock); |
0db98202 JL |
572 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
573 | battery->alarm); | |
038fdea2 | 574 | mutex_unlock(&battery->lock); |
aa650bbd | 575 | |
1da177e4 | 576 | if (ACPI_FAILURE(status)) |
d550d98d | 577 | return -ENODEV; |
1da177e4 | 578 | |
aa650bbd | 579 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 580 | return 0; |
1da177e4 LT |
581 | } |
582 | ||
b6ce4083 | 583 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 584 | { |
b6ce4083 | 585 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 586 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 587 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 588 | return 0; |
b6ce4083 | 589 | } |
7b3bcc4a | 590 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
591 | if (!battery->alarm) |
592 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 593 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 594 | } |
1da177e4 | 595 | |
508df92d AB |
596 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
597 | struct device_attribute *attr, | |
598 | char *buf) | |
599 | { | |
600 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
601 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
602 | } | |
603 | ||
604 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
605 | struct device_attribute *attr, | |
606 | const char *buf, size_t count) | |
607 | { | |
608 | unsigned long x; | |
609 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 610 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
611 | battery->alarm = x/1000; |
612 | if (acpi_battery_present(battery)) | |
613 | acpi_battery_set_alarm(battery); | |
614 | return count; | |
615 | } | |
616 | ||
617 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 618 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
619 | .show = acpi_battery_alarm_show, |
620 | .store = acpi_battery_alarm_store, | |
621 | }; | |
622 | ||
623 | static int sysfs_add_battery(struct acpi_battery *battery) | |
624 | { | |
625 | int result; | |
626 | ||
ae6f6187 | 627 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
508df92d AB |
628 | battery->bat.properties = charge_battery_props; |
629 | battery->bat.num_properties = | |
630 | ARRAY_SIZE(charge_battery_props); | |
631 | } else { | |
632 | battery->bat.properties = energy_battery_props; | |
633 | battery->bat.num_properties = | |
634 | ARRAY_SIZE(energy_battery_props); | |
635 | } | |
636 | ||
637 | battery->bat.name = acpi_device_bid(battery->device); | |
638 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
639 | battery->bat.get_property = acpi_battery_get_property; | |
640 | ||
e0d1f09e ZR |
641 | result = power_supply_register_no_ws(&battery->device->dev, &battery->bat); |
642 | ||
508df92d AB |
643 | if (result) |
644 | return result; | |
645 | return device_create_file(battery->bat.dev, &alarm_attr); | |
646 | } | |
647 | ||
648 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
649 | { | |
69d94ec6 | 650 | mutex_lock(&battery->sysfs_lock); |
9c921c22 | 651 | if (!battery->bat.dev) { |
69d94ec6 | 652 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 653 | return; |
9c921c22 LT |
654 | } |
655 | ||
508df92d AB |
656 | device_remove_file(battery->bat.dev, &alarm_attr); |
657 | power_supply_unregister(&battery->bat); | |
9104476e | 658 | battery->bat.dev = NULL; |
69d94ec6 | 659 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
660 | } |
661 | ||
4000e626 KI |
662 | static void find_battery(const struct dmi_header *dm, void *private) |
663 | { | |
664 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
665 | /* Note: the hardcoded offsets below have been extracted from | |
666 | the source code of dmidecode. */ | |
667 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
668 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
669 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
670 | if (dm->length >= 18) | |
671 | dmi_capacity *= dmi_data[17]; | |
672 | if (battery->design_capacity * battery->design_voltage / 1000 | |
673 | != dmi_capacity && | |
674 | battery->design_capacity * 10 == dmi_capacity) | |
675 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
676 | &battery->flags); | |
677 | } | |
678 | } | |
679 | ||
557d5868 ZR |
680 | /* |
681 | * According to the ACPI spec, some kinds of primary batteries can | |
682 | * report percentage battery remaining capacity directly to OS. | |
683 | * In this case, it reports the Last Full Charged Capacity == 100 | |
684 | * and BatteryPresentRate == 0xFFFFFFFF. | |
685 | * | |
686 | * Now we found some battery reports percentage remaining capacity | |
687 | * even if it's rechargeable. | |
688 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
689 | * | |
690 | * Handle this correctly so that they won't break userspace. | |
691 | */ | |
7b78622d | 692 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
693 | { |
694 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 695 | return; |
557d5868 | 696 | |
0f4c6547 NM |
697 | if (battery->full_charge_capacity == 100 && |
698 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
699 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
700 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
701 | battery->full_charge_capacity = battery->design_capacity; | |
702 | battery->capacity_now = (battery->capacity_now * | |
703 | battery->full_charge_capacity) / 100; | |
704 | } | |
4000e626 KI |
705 | |
706 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 707 | return; |
4000e626 KI |
708 | |
709 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
710 | const char *s; | |
711 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
712 | if (s && !strnicmp(s, "ThinkPad", 8)) { | |
713 | dmi_walk(find_battery, battery); | |
714 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
715 | &battery->flags) && | |
716 | battery->design_voltage) { | |
717 | battery->design_capacity = | |
718 | battery->design_capacity * | |
719 | 10000 / battery->design_voltage; | |
720 | battery->full_charge_capacity = | |
721 | battery->full_charge_capacity * | |
722 | 10000 / battery->design_voltage; | |
723 | battery->design_capacity_warning = | |
724 | battery->design_capacity_warning * | |
725 | 10000 / battery->design_voltage; | |
726 | battery->capacity_now = battery->capacity_now * | |
727 | 10000 / battery->design_voltage; | |
728 | } | |
729 | } | |
730 | } | |
557d5868 ZR |
731 | } |
732 | ||
9e50bc14 | 733 | static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
b6ce4083 | 734 | { |
50b17851 | 735 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 736 | result = acpi_battery_get_status(battery); |
508df92d | 737 | if (result) |
b6ce4083 | 738 | return result; |
508df92d AB |
739 | if (!acpi_battery_present(battery)) { |
740 | sysfs_remove_battery(battery); | |
97749cd9 | 741 | battery->update_time = 0; |
508df92d | 742 | return 0; |
b6ce4083 | 743 | } |
9e50bc14 LT |
744 | |
745 | if (resume) | |
746 | return 0; | |
747 | ||
50b17851 AS |
748 | if (!battery->update_time || |
749 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
750 | result = acpi_battery_get_info(battery); |
751 | if (result) | |
752 | return result; | |
753 | acpi_battery_init_alarm(battery); | |
754 | } | |
eb03cb02 SH |
755 | if (!battery->bat.dev) { |
756 | result = sysfs_add_battery(battery); | |
757 | if (result) | |
758 | return result; | |
759 | } | |
557d5868 | 760 | result = acpi_battery_get_state(battery); |
e0d1f09e ZR |
761 | if (result) |
762 | return result; | |
7b78622d | 763 | acpi_battery_quirks(battery); |
e0d1f09e ZR |
764 | |
765 | /* | |
766 | * Wakeup the system if battery is critical low | |
767 | * or lower than the alarm level | |
768 | */ | |
769 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
770 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
771 | (battery->capacity_now <= battery->alarm))) | |
772 | pm_wakeup_event(&battery->device->dev, 0); | |
773 | ||
557d5868 | 774 | return result; |
4bd35cdb VL |
775 | } |
776 | ||
da8aeb92 RW |
777 | static void acpi_battery_refresh(struct acpi_battery *battery) |
778 | { | |
c5971456 AW |
779 | int power_unit; |
780 | ||
da8aeb92 RW |
781 | if (!battery->bat.dev) |
782 | return; | |
783 | ||
c5971456 AW |
784 | power_unit = battery->power_unit; |
785 | ||
da8aeb92 | 786 | acpi_battery_get_info(battery); |
c5971456 AW |
787 | |
788 | if (power_unit == battery->power_unit) | |
789 | return; | |
790 | ||
791 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
792 | sysfs_remove_battery(battery); |
793 | sysfs_add_battery(battery); | |
794 | } | |
795 | ||
3a670cc7 LT |
796 | /* -------------------------------------------------------------------------- |
797 | FS Interface (/proc) | |
798 | -------------------------------------------------------------------------- */ | |
799 | ||
800 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
801 | static struct proc_dir_entry *acpi_battery_dir; | |
802 | ||
803 | static int acpi_battery_print_info(struct seq_file *seq, int result) | |
804 | { | |
805 | struct acpi_battery *battery = seq->private; | |
806 | ||
807 | if (result) | |
808 | goto end; | |
809 | ||
810 | seq_printf(seq, "present: %s\n", | |
811 | acpi_battery_present(battery) ? "yes" : "no"); | |
812 | if (!acpi_battery_present(battery)) | |
813 | goto end; | |
814 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
815 | seq_printf(seq, "design capacity: unknown\n"); | |
816 | else | |
817 | seq_printf(seq, "design capacity: %d %sh\n", | |
818 | battery->design_capacity, | |
819 | acpi_battery_units(battery)); | |
820 | ||
821 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
822 | seq_printf(seq, "last full capacity: unknown\n"); | |
823 | else | |
824 | seq_printf(seq, "last full capacity: %d %sh\n", | |
825 | battery->full_charge_capacity, | |
826 | acpi_battery_units(battery)); | |
827 | ||
828 | seq_printf(seq, "battery technology: %srechargeable\n", | |
829 | (!battery->technology)?"non-":""); | |
830 | ||
831 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
832 | seq_printf(seq, "design voltage: unknown\n"); | |
833 | else | |
834 | seq_printf(seq, "design voltage: %d mV\n", | |
835 | battery->design_voltage); | |
836 | seq_printf(seq, "design capacity warning: %d %sh\n", | |
837 | battery->design_capacity_warning, | |
838 | acpi_battery_units(battery)); | |
839 | seq_printf(seq, "design capacity low: %d %sh\n", | |
840 | battery->design_capacity_low, | |
841 | acpi_battery_units(battery)); | |
842 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); | |
843 | seq_printf(seq, "capacity granularity 1: %d %sh\n", | |
844 | battery->capacity_granularity_1, | |
845 | acpi_battery_units(battery)); | |
846 | seq_printf(seq, "capacity granularity 2: %d %sh\n", | |
847 | battery->capacity_granularity_2, | |
848 | acpi_battery_units(battery)); | |
849 | seq_printf(seq, "model number: %s\n", battery->model_number); | |
850 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
851 | seq_printf(seq, "battery type: %s\n", battery->type); | |
852 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
853 | end: | |
854 | if (result) | |
855 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
856 | return result; | |
857 | } | |
858 | ||
859 | static int acpi_battery_print_state(struct seq_file *seq, int result) | |
860 | { | |
861 | struct acpi_battery *battery = seq->private; | |
862 | ||
863 | if (result) | |
864 | goto end; | |
865 | ||
866 | seq_printf(seq, "present: %s\n", | |
867 | acpi_battery_present(battery) ? "yes" : "no"); | |
868 | if (!acpi_battery_present(battery)) | |
869 | goto end; | |
870 | ||
871 | seq_printf(seq, "capacity state: %s\n", | |
872 | (battery->state & 0x04) ? "critical" : "ok"); | |
873 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
874 | seq_printf(seq, | |
875 | "charging state: charging/discharging\n"); | |
876 | else if (battery->state & 0x01) | |
877 | seq_printf(seq, "charging state: discharging\n"); | |
878 | else if (battery->state & 0x02) | |
879 | seq_printf(seq, "charging state: charging\n"); | |
880 | else | |
881 | seq_printf(seq, "charging state: charged\n"); | |
882 | ||
883 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
884 | seq_printf(seq, "present rate: unknown\n"); | |
885 | else | |
886 | seq_printf(seq, "present rate: %d %s\n", | |
887 | battery->rate_now, acpi_battery_units(battery)); | |
888 | ||
889 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
890 | seq_printf(seq, "remaining capacity: unknown\n"); | |
891 | else | |
892 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
893 | battery->capacity_now, acpi_battery_units(battery)); | |
894 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
895 | seq_printf(seq, "present voltage: unknown\n"); | |
896 | else | |
897 | seq_printf(seq, "present voltage: %d mV\n", | |
898 | battery->voltage_now); | |
899 | end: | |
900 | if (result) | |
901 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
902 | ||
903 | return result; | |
904 | } | |
905 | ||
906 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) | |
907 | { | |
908 | struct acpi_battery *battery = seq->private; | |
909 | ||
910 | if (result) | |
911 | goto end; | |
912 | ||
913 | if (!acpi_battery_present(battery)) { | |
914 | seq_printf(seq, "present: no\n"); | |
915 | goto end; | |
916 | } | |
917 | seq_printf(seq, "alarm: "); | |
918 | if (!battery->alarm) | |
919 | seq_printf(seq, "unsupported\n"); | |
920 | else | |
921 | seq_printf(seq, "%u %sh\n", battery->alarm, | |
922 | acpi_battery_units(battery)); | |
923 | end: | |
924 | if (result) | |
925 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
926 | return result; | |
927 | } | |
928 | ||
929 | static ssize_t acpi_battery_write_alarm(struct file *file, | |
930 | const char __user * buffer, | |
931 | size_t count, loff_t * ppos) | |
932 | { | |
933 | int result = 0; | |
934 | char alarm_string[12] = { '\0' }; | |
935 | struct seq_file *m = file->private_data; | |
936 | struct acpi_battery *battery = m->private; | |
937 | ||
938 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
939 | return -EINVAL; | |
940 | if (!acpi_battery_present(battery)) { | |
941 | result = -ENODEV; | |
942 | goto end; | |
943 | } | |
944 | if (copy_from_user(alarm_string, buffer, count)) { | |
945 | result = -EFAULT; | |
946 | goto end; | |
947 | } | |
948 | alarm_string[count] = '\0'; | |
3d915894 CJ |
949 | if (kstrtoint(alarm_string, 0, &battery->alarm)) { |
950 | result = -EINVAL; | |
951 | goto end; | |
952 | } | |
3a670cc7 LT |
953 | result = acpi_battery_set_alarm(battery); |
954 | end: | |
955 | if (!result) | |
956 | return count; | |
957 | return result; | |
958 | } | |
959 | ||
960 | typedef int(*print_func)(struct seq_file *seq, int result); | |
961 | ||
962 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
963 | acpi_battery_print_info, | |
964 | acpi_battery_print_state, | |
965 | acpi_battery_print_alarm, | |
966 | }; | |
967 | ||
968 | static int acpi_battery_read(int fid, struct seq_file *seq) | |
969 | { | |
970 | struct acpi_battery *battery = seq->private; | |
9e50bc14 | 971 | int result = acpi_battery_update(battery, false); |
3a670cc7 LT |
972 | return acpi_print_funcs[fid](seq, result); |
973 | } | |
974 | ||
975 | #define DECLARE_FILE_FUNCTIONS(_name) \ | |
976 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
977 | { \ | |
978 | return acpi_battery_read(_name##_tag, seq); \ | |
979 | } \ | |
980 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
981 | { \ | |
982 | return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \ | |
983 | } | |
984 | ||
985 | DECLARE_FILE_FUNCTIONS(info); | |
986 | DECLARE_FILE_FUNCTIONS(state); | |
987 | DECLARE_FILE_FUNCTIONS(alarm); | |
988 | ||
989 | #undef DECLARE_FILE_FUNCTIONS | |
990 | ||
991 | #define FILE_DESCRIPTION_RO(_name) \ | |
992 | { \ | |
993 | .name = __stringify(_name), \ | |
994 | .mode = S_IRUGO, \ | |
995 | .ops = { \ | |
996 | .open = acpi_battery_##_name##_open_fs, \ | |
997 | .read = seq_read, \ | |
998 | .llseek = seq_lseek, \ | |
999 | .release = single_release, \ | |
1000 | .owner = THIS_MODULE, \ | |
1001 | }, \ | |
1002 | } | |
1003 | ||
1004 | #define FILE_DESCRIPTION_RW(_name) \ | |
1005 | { \ | |
1006 | .name = __stringify(_name), \ | |
1007 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
1008 | .ops = { \ | |
1009 | .open = acpi_battery_##_name##_open_fs, \ | |
1010 | .read = seq_read, \ | |
1011 | .llseek = seq_lseek, \ | |
1012 | .write = acpi_battery_write_##_name, \ | |
1013 | .release = single_release, \ | |
1014 | .owner = THIS_MODULE, \ | |
1015 | }, \ | |
1016 | } | |
1017 | ||
1018 | static const struct battery_file { | |
1019 | struct file_operations ops; | |
1020 | umode_t mode; | |
1021 | const char *name; | |
1022 | } acpi_battery_file[] = { | |
1023 | FILE_DESCRIPTION_RO(info), | |
1024 | FILE_DESCRIPTION_RO(state), | |
1025 | FILE_DESCRIPTION_RW(alarm), | |
1026 | }; | |
1027 | ||
1028 | #undef FILE_DESCRIPTION_RO | |
1029 | #undef FILE_DESCRIPTION_RW | |
1030 | ||
1031 | static int acpi_battery_add_fs(struct acpi_device *device) | |
1032 | { | |
1033 | struct proc_dir_entry *entry = NULL; | |
1034 | int i; | |
1035 | ||
1036 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," | |
1037 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1038 | if (!acpi_device_dir(device)) { | |
1039 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
1040 | acpi_battery_dir); | |
1041 | if (!acpi_device_dir(device)) | |
1042 | return -ENODEV; | |
1043 | } | |
1044 | ||
1045 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { | |
1046 | entry = proc_create_data(acpi_battery_file[i].name, | |
1047 | acpi_battery_file[i].mode, | |
1048 | acpi_device_dir(device), | |
1049 | &acpi_battery_file[i].ops, | |
1050 | acpi_driver_data(device)); | |
1051 | if (!entry) | |
1052 | return -ENODEV; | |
1053 | } | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | static void acpi_battery_remove_fs(struct acpi_device *device) | |
1058 | { | |
1059 | int i; | |
1060 | if (!acpi_device_dir(device)) | |
1061 | return; | |
1062 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
1063 | remove_proc_entry(acpi_battery_file[i].name, | |
1064 | acpi_device_dir(device)); | |
1065 | ||
1066 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
1067 | acpi_device_dir(device) = NULL; | |
1068 | } | |
1069 | ||
1070 | #endif | |
1071 | ||
1da177e4 LT |
1072 | /* -------------------------------------------------------------------------- |
1073 | Driver Interface | |
1074 | -------------------------------------------------------------------------- */ | |
1075 | ||
d9406691 | 1076 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1077 | { |
d9406691 | 1078 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 1079 | struct device *old; |
d9406691 | 1080 | |
1da177e4 | 1081 | if (!battery) |
d550d98d | 1082 | return; |
153e500f | 1083 | old = battery->bat.dev; |
f43691c6 AM |
1084 | /* |
1085 | * On Acer Aspire V5-573G notifications are sometimes triggered too | |
1086 | * early. For example, when AC is unplugged and notification is | |
1087 | * triggered, battery state is still reported as "Full", and changes to | |
1088 | * "Discharging" only after short delay, without any notification. | |
1089 | */ | |
1090 | if (battery_notification_delay_ms > 0) | |
1091 | msleep(battery_notification_delay_ms); | |
da8aeb92 RW |
1092 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1093 | acpi_battery_refresh(battery); | |
9e50bc14 | 1094 | acpi_battery_update(battery, false); |
f1d4661a | 1095 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1096 | dev_name(&device->dev), event, |
9ea7d575 | 1097 | acpi_battery_present(battery)); |
411e0f77 | 1098 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1099 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 1100 | if (old && battery->bat.dev) |
f79e1cec | 1101 | power_supply_changed(&battery->bat); |
1da177e4 LT |
1102 | } |
1103 | ||
25be5821 KM |
1104 | static int battery_notify(struct notifier_block *nb, |
1105 | unsigned long mode, void *_unused) | |
1106 | { | |
1107 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1108 | pm_nb); | |
9e50bc14 LT |
1109 | int result; |
1110 | ||
25be5821 | 1111 | switch (mode) { |
d5a5911b | 1112 | case PM_POST_HIBERNATION: |
25be5821 | 1113 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1114 | if (!acpi_battery_present(battery)) |
1115 | return 0; | |
1116 | ||
1117 | if (!battery->bat.dev) { | |
1118 | result = acpi_battery_get_info(battery); | |
1119 | if (result) | |
1120 | return result; | |
1121 | ||
1122 | result = sysfs_add_battery(battery); | |
1123 | if (result) | |
1124 | return result; | |
1125 | } else | |
1126 | acpi_battery_refresh(battery); | |
1127 | ||
1128 | acpi_battery_init_alarm(battery); | |
1129 | acpi_battery_get_state(battery); | |
25be5821 KM |
1130 | break; |
1131 | } | |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | ||
3f5dc08f AM |
1136 | static int battery_bix_broken_package_quirk(const struct dmi_system_id *d) |
1137 | { | |
1138 | battery_bix_broken_package = 1; | |
1139 | return 0; | |
1140 | } | |
1141 | ||
f43691c6 AM |
1142 | static int battery_notification_delay_quirk(const struct dmi_system_id *d) |
1143 | { | |
1144 | battery_notification_delay_ms = 1000; | |
1145 | return 0; | |
1146 | } | |
1147 | ||
a90b4038 LT |
1148 | static struct dmi_system_id bat_dmi_table[] = { |
1149 | { | |
3f5dc08f | 1150 | .callback = battery_bix_broken_package_quirk, |
a90b4038 LT |
1151 | .ident = "NEC LZ750/LS", |
1152 | .matches = { | |
1153 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1154 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1155 | }, | |
1156 | }, | |
f43691c6 AM |
1157 | { |
1158 | .callback = battery_notification_delay_quirk, | |
1159 | .ident = "Acer Aspire V5-573G", | |
1160 | .matches = { | |
1161 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1162 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), | |
1163 | }, | |
1164 | }, | |
a90b4038 LT |
1165 | {}, |
1166 | }; | |
1167 | ||
75646e75 LT |
1168 | /* |
1169 | * Some machines'(E,G Lenovo Z480) ECs are not stable | |
1170 | * during boot up and this causes battery driver fails to be | |
1171 | * probed due to failure of getting battery information | |
1172 | * from EC sometimes. After several retries, the operation | |
1173 | * may work. So add retry code here and 20ms sleep between | |
1174 | * every retries. | |
1175 | */ | |
1176 | static int acpi_battery_update_retry(struct acpi_battery *battery) | |
1177 | { | |
1178 | int retry, ret; | |
1179 | ||
1180 | for (retry = 5; retry; retry--) { | |
1181 | ret = acpi_battery_update(battery, false); | |
1182 | if (!ret) | |
1183 | break; | |
1184 | ||
1185 | msleep(20); | |
1186 | } | |
1187 | return ret; | |
1188 | } | |
1189 | ||
4be44fcd | 1190 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1191 | { |
4be44fcd | 1192 | int result = 0; |
4be44fcd | 1193 | struct acpi_battery *battery = NULL; |
952c63e9 | 1194 | |
1da177e4 | 1195 | if (!device) |
d550d98d | 1196 | return -EINVAL; |
36bcbec7 | 1197 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1198 | if (!battery) |
d550d98d | 1199 | return -ENOMEM; |
145def84 | 1200 | battery->device = device; |
1da177e4 LT |
1201 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1202 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1203 | device->driver_data = battery; |
038fdea2 | 1204 | mutex_init(&battery->lock); |
69d94ec6 | 1205 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1206 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1207 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
75646e75 LT |
1208 | |
1209 | result = acpi_battery_update_retry(battery); | |
eb03cb02 SH |
1210 | if (result) |
1211 | goto fail; | |
75646e75 | 1212 | |
3a670cc7 LT |
1213 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1214 | result = acpi_battery_add_fs(device); | |
1215 | #endif | |
1216 | if (result) { | |
1217 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1218 | acpi_battery_remove_fs(device); | |
1219 | #endif | |
1220 | goto fail; | |
1221 | } | |
25be5821 | 1222 | |
e80bba4b SH |
1223 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1224 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1225 | device->status.battery_present ? "present" : "absent"); | |
1226 | ||
25be5821 KM |
1227 | battery->pm_nb.notifier_call = battery_notify; |
1228 | register_pm_notifier(&battery->pm_nb); | |
1229 | ||
e0d1f09e ZR |
1230 | device_init_wakeup(&device->dev, 1); |
1231 | ||
d550d98d | 1232 | return result; |
e80bba4b SH |
1233 | |
1234 | fail: | |
1235 | sysfs_remove_battery(battery); | |
1236 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1237 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1238 | kfree(battery); |
1239 | return result; | |
1da177e4 LT |
1240 | } |
1241 | ||
51fac838 | 1242 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1243 | { |
4be44fcd | 1244 | struct acpi_battery *battery = NULL; |
1da177e4 | 1245 | |
1da177e4 | 1246 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1247 | return -EINVAL; |
e0d1f09e | 1248 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1249 | battery = acpi_driver_data(device); |
25be5821 | 1250 | unregister_pm_notifier(&battery->pm_nb); |
3a670cc7 LT |
1251 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1252 | acpi_battery_remove_fs(device); | |
1253 | #endif | |
508df92d | 1254 | sysfs_remove_battery(battery); |
038fdea2 | 1255 | mutex_destroy(&battery->lock); |
69d94ec6 | 1256 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1257 | kfree(battery); |
d550d98d | 1258 | return 0; |
1da177e4 LT |
1259 | } |
1260 | ||
90692404 | 1261 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1262 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1263 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1264 | { |
1265 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1266 | |
1267 | if (!dev) | |
34c4415a | 1268 | return -EINVAL; |
a6f50dc8 RW |
1269 | |
1270 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1271 | if (!battery) | |
1272 | return -EINVAL; | |
1273 | ||
f1d4661a | 1274 | battery->update_time = 0; |
9e50bc14 | 1275 | acpi_battery_update(battery, true); |
b6ce4083 | 1276 | return 0; |
34c4415a | 1277 | } |
7f6895c6 SK |
1278 | #else |
1279 | #define acpi_battery_resume NULL | |
90692404 | 1280 | #endif |
34c4415a | 1281 | |
a6f50dc8 RW |
1282 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1283 | ||
aa650bbd AS |
1284 | static struct acpi_driver acpi_battery_driver = { |
1285 | .name = "battery", | |
1286 | .class = ACPI_BATTERY_CLASS, | |
1287 | .ids = battery_device_ids, | |
d9406691 | 1288 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1289 | .ops = { |
1290 | .add = acpi_battery_add, | |
aa650bbd | 1291 | .remove = acpi_battery_remove, |
d9406691 | 1292 | .notify = acpi_battery_notify, |
aa650bbd | 1293 | }, |
a6f50dc8 | 1294 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1295 | }; |
1296 | ||
b0cbc861 | 1297 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1298 | { |
4d8316d5 | 1299 | if (acpi_disabled) |
0f66af53 | 1300 | return; |
a90b4038 | 1301 | |
3f5dc08f | 1302 | dmi_check_system(bat_dmi_table); |
3a670cc7 LT |
1303 | |
1304 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1305 | acpi_battery_dir = acpi_lock_battery_dir(); | |
1306 | if (!acpi_battery_dir) | |
1307 | return; | |
1308 | #endif | |
1309 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { | |
1310 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1311 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1312 | #endif | |
1313 | return; | |
1314 | } | |
1315 | return; | |
0f66af53 AV |
1316 | } |
1317 | ||
1318 | static int __init acpi_battery_init(void) | |
1319 | { | |
1320 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 1321 | return 0; |
1da177e4 LT |
1322 | } |
1323 | ||
4be44fcd | 1324 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1325 | { |
1da177e4 | 1326 | acpi_bus_unregister_driver(&acpi_battery_driver); |
3a670cc7 LT |
1327 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1328 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1329 | #endif | |
1da177e4 LT |
1330 | } |
1331 | ||
1da177e4 LT |
1332 | module_init(acpi_battery_init); |
1333 | module_exit(acpi_battery_exit); |