Commit | Line | Data |
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1da177e4 | 1 | /* |
aa650bbd | 2 | * battery.c - ACPI Battery Driver (Revision: 2.0) |
1da177e4 | 3 | * |
aa650bbd AS |
4 | * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
5 | * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> | |
1da177e4 LT |
6 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
7 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
8 | * | |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or (at | |
14 | * your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with this program; if not, write to the Free Software Foundation, Inc., | |
23 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
24 | * | |
25 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/types.h> | |
f1d4661a | 32 | #include <linux/jiffies.h> |
0f66af53 | 33 | #include <linux/async.h> |
bc76f90b | 34 | #include <linux/dmi.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
25be5821 | 36 | #include <linux/suspend.h> |
4000e626 | 37 | #include <asm/unaligned.h> |
d7380965 | 38 | |
fdcedbba | 39 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
40 | #include <linux/proc_fs.h> |
41 | #include <linux/seq_file.h> | |
42 | #include <asm/uaccess.h> | |
d7380965 | 43 | #endif |
1da177e4 LT |
44 | |
45 | #include <acpi/acpi_bus.h> | |
46 | #include <acpi/acpi_drivers.h> | |
d7380965 AS |
47 | #include <linux/power_supply.h> |
48 | ||
a192a958 LB |
49 | #define PREFIX "ACPI: " |
50 | ||
1da177e4 LT |
51 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
52 | ||
1da177e4 | 53 | #define ACPI_BATTERY_CLASS "battery" |
1da177e4 | 54 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
55 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
56 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
c67fcd67 | 57 | #define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82 |
1da177e4 | 58 | |
ae6f6187 LT |
59 | /* Battery power unit: 0 means mW, 1 means mA */ |
60 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
61 | ||
1da177e4 | 62 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 63 | |
f52fd66d | 64 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 65 | |
f52fd66d | 66 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 67 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 68 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
69 | MODULE_LICENSE("GPL"); |
70 | ||
f1d4661a AS |
71 | static unsigned int cache_time = 1000; |
72 | module_param(cache_time, uint, 0644); | |
73 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 74 | |
fdcedbba | 75 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
76 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
77 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
78 | ||
d7380965 AS |
79 | enum acpi_battery_files { |
80 | info_tag = 0, | |
81 | state_tag, | |
82 | alarm_tag, | |
83 | ACPI_BATTERY_NUMFILES, | |
84 | }; | |
85 | ||
86 | #endif | |
87 | ||
1ba90e3a TR |
88 | static const struct acpi_device_id battery_device_ids[] = { |
89 | {"PNP0C0A", 0}, | |
90 | {"", 0}, | |
91 | }; | |
1ba90e3a | 92 | |
aa650bbd | 93 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 94 | |
7b3bcc4a AS |
95 | enum { |
96 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 97 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 98 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
99 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
100 | switches between mWh and mAh depending on whether the system | |
101 | is running on battery or not. When mAh is the unit, most | |
102 | reported values are incorrect and need to be adjusted by | |
103 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
104 | Pre-2010 and 2012 models appear to always report in mWh and | |
105 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
106 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
107 | the 2011 models that fixes the issue (tested on x220 with a | |
108 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
109 | available for the 2010 models. */ | |
110 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
7b3bcc4a | 111 | }; |
78490d82 | 112 | |
1da177e4 | 113 | struct acpi_battery { |
038fdea2 | 114 | struct mutex lock; |
69d94ec6 | 115 | struct mutex sysfs_lock; |
d7380965 | 116 | struct power_supply bat; |
f1d4661a | 117 | struct acpi_device *device; |
25be5821 | 118 | struct notifier_block pm_nb; |
f1d4661a | 119 | unsigned long update_time; |
016d5baa | 120 | int revision; |
7faa144a | 121 | int rate_now; |
d7380965 AS |
122 | int capacity_now; |
123 | int voltage_now; | |
038fdea2 | 124 | int design_capacity; |
d7380965 | 125 | int full_charge_capacity; |
038fdea2 AS |
126 | int technology; |
127 | int design_voltage; | |
128 | int design_capacity_warning; | |
129 | int design_capacity_low; | |
c67fcd67 AS |
130 | int cycle_count; |
131 | int measurement_accuracy; | |
132 | int max_sampling_time; | |
133 | int min_sampling_time; | |
134 | int max_averaging_interval; | |
135 | int min_averaging_interval; | |
038fdea2 AS |
136 | int capacity_granularity_1; |
137 | int capacity_granularity_2; | |
f1d4661a | 138 | int alarm; |
038fdea2 AS |
139 | char model_number[32]; |
140 | char serial_number[32]; | |
141 | char type[32]; | |
142 | char oem_info[32]; | |
f1d4661a AS |
143 | int state; |
144 | int power_unit; | |
7b3bcc4a | 145 | unsigned long flags; |
1da177e4 LT |
146 | }; |
147 | ||
497888cf | 148 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
d7380965 | 149 | |
efd941f1 | 150 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 151 | { |
78490d82 AS |
152 | return battery->device->status.battery_present; |
153 | } | |
038fdea2 | 154 | |
d7380965 AS |
155 | static int acpi_battery_technology(struct acpi_battery *battery) |
156 | { | |
157 | if (!strcasecmp("NiCd", battery->type)) | |
158 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
159 | if (!strcasecmp("NiMH", battery->type)) | |
160 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
161 | if (!strcasecmp("LION", battery->type)) | |
162 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 163 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 164 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
165 | if (!strcasecmp("LiP", battery->type)) |
166 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
167 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
168 | } | |
169 | ||
9104476e | 170 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 171 | |
56f382a0 RH |
172 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
173 | { | |
174 | /* either charging or discharging */ | |
175 | if (battery->state != 0) | |
176 | return 0; | |
177 | ||
178 | /* battery not reporting charge */ | |
179 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
180 | battery->capacity_now == 0) | |
181 | return 0; | |
182 | ||
183 | /* good batteries update full_charge as the batteries degrade */ | |
184 | if (battery->full_charge_capacity == battery->capacity_now) | |
185 | return 1; | |
186 | ||
187 | /* fallback to using design values for broken batteries */ | |
188 | if (battery->design_capacity == battery->capacity_now) | |
189 | return 1; | |
190 | ||
191 | /* we don't do any sort of metric based on percentages */ | |
192 | return 0; | |
193 | } | |
194 | ||
d7380965 AS |
195 | static int acpi_battery_get_property(struct power_supply *psy, |
196 | enum power_supply_property psp, | |
197 | union power_supply_propval *val) | |
198 | { | |
a1b4bd69 | 199 | int ret = 0; |
d7380965 AS |
200 | struct acpi_battery *battery = to_acpi_battery(psy); |
201 | ||
9104476e AS |
202 | if (acpi_battery_present(battery)) { |
203 | /* run battery update only if it is present */ | |
204 | acpi_battery_get_state(battery); | |
205 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
206 | return -ENODEV; |
207 | switch (psp) { | |
208 | case POWER_SUPPLY_PROP_STATUS: | |
209 | if (battery->state & 0x01) | |
210 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
211 | else if (battery->state & 0x02) | |
212 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
56f382a0 | 213 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 214 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
215 | else |
216 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
217 | break; |
218 | case POWER_SUPPLY_PROP_PRESENT: | |
219 | val->intval = acpi_battery_present(battery); | |
220 | break; | |
221 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
222 | val->intval = acpi_battery_technology(battery); | |
223 | break; | |
c67fcd67 AS |
224 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
225 | val->intval = battery->cycle_count; | |
226 | break; | |
d7380965 | 227 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
228 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
229 | ret = -ENODEV; | |
230 | else | |
231 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
232 | break; |
233 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
234 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
235 | ret = -ENODEV; | |
236 | else | |
237 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
238 | break; |
239 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 240 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
241 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
242 | ret = -ENODEV; | |
243 | else | |
244 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
245 | break; |
246 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
247 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
248 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
249 | ret = -ENODEV; | |
250 | else | |
251 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
252 | break; |
253 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
254 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
255 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
256 | ret = -ENODEV; | |
257 | else | |
258 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
259 | break; |
260 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
261 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
262 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
263 | ret = -ENODEV; | |
264 | else | |
265 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 266 | break; |
a58e1150 | 267 | case POWER_SUPPLY_PROP_CAPACITY: |
268 | if (battery->capacity_now && battery->full_charge_capacity) | |
269 | val->intval = battery->capacity_now * 100/ | |
270 | battery->full_charge_capacity; | |
271 | else | |
272 | val->intval = 0; | |
273 | break; | |
d7380965 AS |
274 | case POWER_SUPPLY_PROP_MODEL_NAME: |
275 | val->strval = battery->model_number; | |
276 | break; | |
277 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
278 | val->strval = battery->oem_info; | |
279 | break; | |
7c2670bb | 280 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
281 | val->strval = battery->serial_number; | |
282 | break; | |
d7380965 | 283 | default: |
a1b4bd69 | 284 | ret = -EINVAL; |
d7380965 | 285 | } |
a1b4bd69 | 286 | return ret; |
d7380965 AS |
287 | } |
288 | ||
289 | static enum power_supply_property charge_battery_props[] = { | |
290 | POWER_SUPPLY_PROP_STATUS, | |
291 | POWER_SUPPLY_PROP_PRESENT, | |
292 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 293 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
294 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
295 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
296 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
297 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
298 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
299 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 300 | POWER_SUPPLY_PROP_CAPACITY, |
d7380965 AS |
301 | POWER_SUPPLY_PROP_MODEL_NAME, |
302 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 303 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
304 | }; |
305 | ||
306 | static enum power_supply_property energy_battery_props[] = { | |
307 | POWER_SUPPLY_PROP_STATUS, | |
308 | POWER_SUPPLY_PROP_PRESENT, | |
309 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 310 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
311 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
312 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 313 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
314 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
315 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
316 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 317 | POWER_SUPPLY_PROP_CAPACITY, |
d7380965 AS |
318 | POWER_SUPPLY_PROP_MODEL_NAME, |
319 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 320 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
321 | }; |
322 | ||
fdcedbba | 323 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 324 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 325 | { |
ae6f6187 LT |
326 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? |
327 | "mA" : "mW"; | |
b6ce4083 | 328 | } |
d7380965 | 329 | #endif |
b6ce4083 | 330 | |
78490d82 AS |
331 | /* -------------------------------------------------------------------------- |
332 | Battery Management | |
333 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
334 | struct acpi_offsets { |
335 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
336 | u8 mode; /* int or string? */ | |
337 | }; | |
b6ce4083 | 338 | |
038fdea2 AS |
339 | static struct acpi_offsets state_offsets[] = { |
340 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 341 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
342 | {offsetof(struct acpi_battery, capacity_now), 0}, |
343 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 344 | }; |
b6ce4083 | 345 | |
038fdea2 AS |
346 | static struct acpi_offsets info_offsets[] = { |
347 | {offsetof(struct acpi_battery, power_unit), 0}, | |
348 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 349 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
350 | {offsetof(struct acpi_battery, technology), 0}, |
351 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
352 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
353 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
354 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
355 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
356 | {offsetof(struct acpi_battery, model_number), 1}, | |
357 | {offsetof(struct acpi_battery, serial_number), 1}, | |
358 | {offsetof(struct acpi_battery, type), 1}, | |
359 | {offsetof(struct acpi_battery, oem_info), 1}, | |
360 | }; | |
b6ce4083 | 361 | |
c67fcd67 | 362 | static struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 363 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
364 | {offsetof(struct acpi_battery, power_unit), 0}, |
365 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
366 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
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, cycle_count), 0}, | |
372 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
373 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
374 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
375 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
376 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
377 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
378 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
379 | {offsetof(struct acpi_battery, model_number), 1}, | |
380 | {offsetof(struct acpi_battery, serial_number), 1}, | |
381 | {offsetof(struct acpi_battery, type), 1}, | |
382 | {offsetof(struct acpi_battery, oem_info), 1}, | |
383 | }; | |
384 | ||
038fdea2 AS |
385 | static int extract_package(struct acpi_battery *battery, |
386 | union acpi_object *package, | |
387 | struct acpi_offsets *offsets, int num) | |
388 | { | |
106449e8 | 389 | int i; |
038fdea2 AS |
390 | union acpi_object *element; |
391 | if (package->type != ACPI_TYPE_PACKAGE) | |
392 | return -EFAULT; | |
393 | for (i = 0; i < num; ++i) { | |
394 | if (package->package.count <= i) | |
395 | return -EFAULT; | |
396 | element = &package->package.elements[i]; | |
397 | if (offsets[i].mode) { | |
106449e8 AS |
398 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
399 | if (element->type == ACPI_TYPE_STRING || | |
400 | element->type == ACPI_TYPE_BUFFER) | |
401 | strncpy(ptr, element->string.pointer, 32); | |
402 | else if (element->type == ACPI_TYPE_INTEGER) { | |
403 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
404 | sizeof(u64)); |
405 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
406 | } else |
407 | *ptr = 0; /* don't have value */ | |
038fdea2 | 408 | } else { |
b8a1bdb1 AS |
409 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
410 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
411 | element->integer.value : -1; | |
038fdea2 | 412 | } |
b6ce4083 | 413 | } |
b6ce4083 VL |
414 | return 0; |
415 | } | |
416 | ||
417 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
418 | { | |
aa650bbd | 419 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
420 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
421 | return -ENODEV; | |
422 | } | |
aa650bbd | 423 | return 0; |
b6ce4083 VL |
424 | } |
425 | ||
426 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 427 | { |
aa650bbd | 428 | int result = -EFAULT; |
4be44fcd | 429 | acpi_status status = 0; |
0f4c6547 | 430 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? |
c67fcd67 AS |
431 | "_BIX" : "_BIF"; |
432 | ||
4be44fcd | 433 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 434 | |
b6ce4083 VL |
435 | if (!acpi_battery_present(battery)) |
436 | return 0; | |
038fdea2 | 437 | mutex_lock(&battery->lock); |
c67fcd67 AS |
438 | status = acpi_evaluate_object(battery->device->handle, name, |
439 | NULL, &buffer); | |
038fdea2 | 440 | mutex_unlock(&battery->lock); |
aa650bbd | 441 | |
1da177e4 | 442 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 443 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 444 | return -ENODEV; |
1da177e4 | 445 | } |
c67fcd67 AS |
446 | if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) |
447 | result = extract_package(battery, buffer.pointer, | |
448 | extended_info_offsets, | |
449 | ARRAY_SIZE(extended_info_offsets)); | |
450 | else | |
451 | result = extract_package(battery, buffer.pointer, | |
452 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 453 | kfree(buffer.pointer); |
557d5868 ZR |
454 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
455 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
456 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
457 | battery->power_unit && battery->design_voltage) { | |
458 | battery->design_capacity = battery->design_capacity * | |
459 | 10000 / battery->design_voltage; | |
460 | battery->full_charge_capacity = battery->full_charge_capacity * | |
461 | 10000 / battery->design_voltage; | |
462 | battery->design_capacity_warning = | |
463 | battery->design_capacity_warning * | |
464 | 10000 / battery->design_voltage; | |
465 | /* Curiously, design_capacity_low, unlike the rest of them, | |
466 | is correct. */ | |
467 | /* capacity_granularity_* equal 1 on the systems tested, so | |
468 | it's impossible to tell if they would need an adjustment | |
469 | or not if their values were higher. */ | |
470 | } | |
d550d98d | 471 | return result; |
1da177e4 LT |
472 | } |
473 | ||
b6ce4083 | 474 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 475 | { |
4be44fcd LB |
476 | int result = 0; |
477 | acpi_status status = 0; | |
478 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 479 | |
b6ce4083 VL |
480 | if (!acpi_battery_present(battery)) |
481 | return 0; | |
1da177e4 | 482 | |
f1d4661a AS |
483 | if (battery->update_time && |
484 | time_before(jiffies, battery->update_time + | |
485 | msecs_to_jiffies(cache_time))) | |
486 | return 0; | |
487 | ||
038fdea2 | 488 | mutex_lock(&battery->lock); |
f1d4661a | 489 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
490 | NULL, &buffer); |
491 | mutex_unlock(&battery->lock); | |
5b31d895 | 492 | |
1da177e4 | 493 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 494 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 495 | return -ENODEV; |
1da177e4 | 496 | } |
aa650bbd | 497 | |
038fdea2 AS |
498 | result = extract_package(battery, buffer.pointer, |
499 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 500 | battery->update_time = jiffies; |
78490d82 | 501 | kfree(buffer.pointer); |
bc76f90b | 502 | |
55003b21 LT |
503 | /* For buggy DSDTs that report negative 16-bit values for either |
504 | * charging or discharging current and/or report 0 as 65536 | |
505 | * due to bad math. | |
506 | */ | |
507 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
508 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
509 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 510 | battery->rate_now = abs((s16)battery->rate_now); |
55003b21 LT |
511 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
512 | " invalid.\n"); | |
513 | } | |
bc76f90b | 514 | |
557d5868 ZR |
515 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
516 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
517 | battery->capacity_now = (battery->capacity_now * | |
518 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
519 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
520 | battery->power_unit && battery->design_voltage) { | |
521 | battery->capacity_now = battery->capacity_now * | |
522 | 10000 / battery->design_voltage; | |
523 | } | |
b6ce4083 VL |
524 | return result; |
525 | } | |
1da177e4 | 526 | |
aa650bbd | 527 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 528 | { |
4be44fcd | 529 | acpi_status status = 0; |
1da177e4 | 530 | |
c67fcd67 | 531 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 532 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 533 | return -ENODEV; |
1da177e4 | 534 | |
038fdea2 | 535 | mutex_lock(&battery->lock); |
0db98202 JL |
536 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
537 | battery->alarm); | |
038fdea2 | 538 | mutex_unlock(&battery->lock); |
aa650bbd | 539 | |
1da177e4 | 540 | if (ACPI_FAILURE(status)) |
d550d98d | 541 | return -ENODEV; |
1da177e4 | 542 | |
aa650bbd | 543 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 544 | return 0; |
1da177e4 LT |
545 | } |
546 | ||
b6ce4083 | 547 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 548 | { |
b6ce4083 | 549 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 550 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 551 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 552 | return 0; |
b6ce4083 | 553 | } |
7b3bcc4a | 554 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
555 | if (!battery->alarm) |
556 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 557 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 558 | } |
1da177e4 | 559 | |
508df92d AB |
560 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
561 | struct device_attribute *attr, | |
562 | char *buf) | |
563 | { | |
564 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
565 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
566 | } | |
567 | ||
568 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
569 | struct device_attribute *attr, | |
570 | const char *buf, size_t count) | |
571 | { | |
572 | unsigned long x; | |
573 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
574 | if (sscanf(buf, "%ld\n", &x) == 1) | |
575 | battery->alarm = x/1000; | |
576 | if (acpi_battery_present(battery)) | |
577 | acpi_battery_set_alarm(battery); | |
578 | return count; | |
579 | } | |
580 | ||
581 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 582 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
583 | .show = acpi_battery_alarm_show, |
584 | .store = acpi_battery_alarm_store, | |
585 | }; | |
586 | ||
587 | static int sysfs_add_battery(struct acpi_battery *battery) | |
588 | { | |
589 | int result; | |
590 | ||
ae6f6187 | 591 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
508df92d AB |
592 | battery->bat.properties = charge_battery_props; |
593 | battery->bat.num_properties = | |
594 | ARRAY_SIZE(charge_battery_props); | |
595 | } else { | |
596 | battery->bat.properties = energy_battery_props; | |
597 | battery->bat.num_properties = | |
598 | ARRAY_SIZE(energy_battery_props); | |
599 | } | |
600 | ||
601 | battery->bat.name = acpi_device_bid(battery->device); | |
602 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
603 | battery->bat.get_property = acpi_battery_get_property; | |
604 | ||
605 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
606 | if (result) | |
607 | return result; | |
608 | return device_create_file(battery->bat.dev, &alarm_attr); | |
609 | } | |
610 | ||
611 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
612 | { | |
69d94ec6 | 613 | mutex_lock(&battery->sysfs_lock); |
9c921c22 | 614 | if (!battery->bat.dev) { |
69d94ec6 | 615 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 616 | return; |
9c921c22 LT |
617 | } |
618 | ||
508df92d AB |
619 | device_remove_file(battery->bat.dev, &alarm_attr); |
620 | power_supply_unregister(&battery->bat); | |
9104476e | 621 | battery->bat.dev = NULL; |
69d94ec6 | 622 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
623 | } |
624 | ||
4000e626 KI |
625 | static void find_battery(const struct dmi_header *dm, void *private) |
626 | { | |
627 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
628 | /* Note: the hardcoded offsets below have been extracted from | |
629 | the source code of dmidecode. */ | |
630 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
631 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
632 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
633 | if (dm->length >= 18) | |
634 | dmi_capacity *= dmi_data[17]; | |
635 | if (battery->design_capacity * battery->design_voltage / 1000 | |
636 | != dmi_capacity && | |
637 | battery->design_capacity * 10 == dmi_capacity) | |
638 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
639 | &battery->flags); | |
640 | } | |
641 | } | |
642 | ||
557d5868 ZR |
643 | /* |
644 | * According to the ACPI spec, some kinds of primary batteries can | |
645 | * report percentage battery remaining capacity directly to OS. | |
646 | * In this case, it reports the Last Full Charged Capacity == 100 | |
647 | * and BatteryPresentRate == 0xFFFFFFFF. | |
648 | * | |
649 | * Now we found some battery reports percentage remaining capacity | |
650 | * even if it's rechargeable. | |
651 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
652 | * | |
653 | * Handle this correctly so that they won't break userspace. | |
654 | */ | |
7b78622d | 655 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
656 | { |
657 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 658 | return; |
557d5868 | 659 | |
0f4c6547 NM |
660 | if (battery->full_charge_capacity == 100 && |
661 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
662 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
663 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
664 | battery->full_charge_capacity = battery->design_capacity; | |
665 | battery->capacity_now = (battery->capacity_now * | |
666 | battery->full_charge_capacity) / 100; | |
667 | } | |
4000e626 KI |
668 | |
669 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 670 | return; |
4000e626 KI |
671 | |
672 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
673 | const char *s; | |
674 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
675 | if (s && !strnicmp(s, "ThinkPad", 8)) { | |
676 | dmi_walk(find_battery, battery); | |
677 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
678 | &battery->flags) && | |
679 | battery->design_voltage) { | |
680 | battery->design_capacity = | |
681 | battery->design_capacity * | |
682 | 10000 / battery->design_voltage; | |
683 | battery->full_charge_capacity = | |
684 | battery->full_charge_capacity * | |
685 | 10000 / battery->design_voltage; | |
686 | battery->design_capacity_warning = | |
687 | battery->design_capacity_warning * | |
688 | 10000 / battery->design_voltage; | |
689 | battery->capacity_now = battery->capacity_now * | |
690 | 10000 / battery->design_voltage; | |
691 | } | |
692 | } | |
693 | } | |
557d5868 ZR |
694 | } |
695 | ||
f1d4661a | 696 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 697 | { |
50b17851 | 698 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 699 | result = acpi_battery_get_status(battery); |
508df92d | 700 | if (result) |
b6ce4083 | 701 | return result; |
508df92d AB |
702 | if (!acpi_battery_present(battery)) { |
703 | sysfs_remove_battery(battery); | |
97749cd9 | 704 | battery->update_time = 0; |
508df92d | 705 | return 0; |
b6ce4083 | 706 | } |
50b17851 AS |
707 | if (!battery->update_time || |
708 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
709 | result = acpi_battery_get_info(battery); |
710 | if (result) | |
711 | return result; | |
712 | acpi_battery_init_alarm(battery); | |
713 | } | |
eb03cb02 SH |
714 | if (!battery->bat.dev) { |
715 | result = sysfs_add_battery(battery); | |
716 | if (result) | |
717 | return result; | |
718 | } | |
557d5868 | 719 | result = acpi_battery_get_state(battery); |
7b78622d | 720 | acpi_battery_quirks(battery); |
557d5868 | 721 | return result; |
4bd35cdb VL |
722 | } |
723 | ||
da8aeb92 RW |
724 | static void acpi_battery_refresh(struct acpi_battery *battery) |
725 | { | |
c5971456 AW |
726 | int power_unit; |
727 | ||
da8aeb92 RW |
728 | if (!battery->bat.dev) |
729 | return; | |
730 | ||
c5971456 AW |
731 | power_unit = battery->power_unit; |
732 | ||
da8aeb92 | 733 | acpi_battery_get_info(battery); |
c5971456 AW |
734 | |
735 | if (power_unit == battery->power_unit) | |
736 | return; | |
737 | ||
738 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
739 | sysfs_remove_battery(battery); |
740 | sysfs_add_battery(battery); | |
741 | } | |
742 | ||
1da177e4 LT |
743 | /* -------------------------------------------------------------------------- |
744 | FS Interface (/proc) | |
745 | -------------------------------------------------------------------------- */ | |
746 | ||
fdcedbba | 747 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 748 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 749 | |
78490d82 | 750 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 751 | { |
50dd0969 | 752 | struct acpi_battery *battery = seq->private; |
1da177e4 | 753 | |
b6ce4083 | 754 | if (result) |
1da177e4 LT |
755 | goto end; |
756 | ||
aa650bbd | 757 | seq_printf(seq, "present: %s\n", |
0f4c6547 | 758 | acpi_battery_present(battery) ? "yes" : "no"); |
aa650bbd | 759 | if (!acpi_battery_present(battery)) |
1da177e4 | 760 | goto end; |
038fdea2 | 761 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
762 | seq_printf(seq, "design capacity: unknown\n"); |
763 | else | |
764 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
765 | battery->design_capacity, |
766 | acpi_battery_units(battery)); | |
1da177e4 | 767 | |
d7380965 | 768 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
769 | seq_printf(seq, "last full capacity: unknown\n"); |
770 | else | |
771 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 772 | battery->full_charge_capacity, |
aa650bbd AS |
773 | acpi_battery_units(battery)); |
774 | ||
775 | seq_printf(seq, "battery technology: %srechargeable\n", | |
776 | (!battery->technology)?"non-":""); | |
1da177e4 | 777 | |
038fdea2 | 778 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
779 | seq_printf(seq, "design voltage: unknown\n"); |
780 | else | |
781 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 782 | battery->design_voltage); |
1da177e4 | 783 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
784 | battery->design_capacity_warning, |
785 | acpi_battery_units(battery)); | |
1da177e4 | 786 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
787 | battery->design_capacity_low, |
788 | acpi_battery_units(battery)); | |
c67fcd67 | 789 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); |
1da177e4 | 790 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
791 | battery->capacity_granularity_1, |
792 | acpi_battery_units(battery)); | |
1da177e4 | 793 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
794 | battery->capacity_granularity_2, |
795 | acpi_battery_units(battery)); | |
038fdea2 AS |
796 | seq_printf(seq, "model number: %s\n", battery->model_number); |
797 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
798 | seq_printf(seq, "battery type: %s\n", battery->type); | |
799 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 800 | end: |
b6ce4083 VL |
801 | if (result) |
802 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
803 | return result; |
804 | } | |
805 | ||
78490d82 | 806 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 807 | { |
50dd0969 | 808 | struct acpi_battery *battery = seq->private; |
1da177e4 | 809 | |
b6ce4083 | 810 | if (result) |
1da177e4 LT |
811 | goto end; |
812 | ||
aa650bbd | 813 | seq_printf(seq, "present: %s\n", |
0f4c6547 | 814 | acpi_battery_present(battery) ? "yes" : "no"); |
aa650bbd | 815 | if (!acpi_battery_present(battery)) |
1da177e4 | 816 | goto end; |
b6ce4083 | 817 | |
aa650bbd | 818 | seq_printf(seq, "capacity state: %s\n", |
0f4c6547 | 819 | (battery->state & 0x04) ? "critical" : "ok"); |
aa650bbd | 820 | if ((battery->state & 0x01) && (battery->state & 0x02)) |
4be44fcd LB |
821 | seq_printf(seq, |
822 | "charging state: charging/discharging\n"); | |
aa650bbd | 823 | else if (battery->state & 0x01) |
1da177e4 | 824 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 825 | else if (battery->state & 0x02) |
1da177e4 | 826 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 827 | else |
1da177e4 | 828 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 829 | |
7faa144a | 830 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
831 | seq_printf(seq, "present rate: unknown\n"); |
832 | else | |
833 | seq_printf(seq, "present rate: %d %s\n", | |
7faa144a | 834 | battery->rate_now, acpi_battery_units(battery)); |
1da177e4 | 835 | |
d7380965 | 836 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
837 | seq_printf(seq, "remaining capacity: unknown\n"); |
838 | else | |
839 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
840 | battery->capacity_now, acpi_battery_units(battery)); |
841 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
842 | seq_printf(seq, "present voltage: unknown\n"); |
843 | else | |
844 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 845 | battery->voltage_now); |
4be44fcd | 846 | end: |
aa650bbd | 847 | if (result) |
b6ce4083 | 848 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
849 | |
850 | return result; | |
851 | } | |
852 | ||
78490d82 | 853 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 854 | { |
50dd0969 | 855 | struct acpi_battery *battery = seq->private; |
1da177e4 | 856 | |
b6ce4083 | 857 | if (result) |
1da177e4 LT |
858 | goto end; |
859 | ||
b6ce4083 | 860 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
861 | seq_printf(seq, "present: no\n"); |
862 | goto end; | |
863 | } | |
1da177e4 LT |
864 | seq_printf(seq, "alarm: "); |
865 | if (!battery->alarm) | |
866 | seq_printf(seq, "unsupported\n"); | |
867 | else | |
aa650bbd AS |
868 | seq_printf(seq, "%u %sh\n", battery->alarm, |
869 | acpi_battery_units(battery)); | |
4be44fcd | 870 | end: |
b6ce4083 VL |
871 | if (result) |
872 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
873 | return result; |
874 | } | |
875 | ||
f1d4661a AS |
876 | static ssize_t acpi_battery_write_alarm(struct file *file, |
877 | const char __user * buffer, | |
878 | size_t count, loff_t * ppos) | |
1da177e4 | 879 | { |
4be44fcd LB |
880 | int result = 0; |
881 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
882 | struct seq_file *m = file->private_data; |
883 | struct acpi_battery *battery = m->private; | |
1da177e4 | 884 | |
1da177e4 | 885 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 886 | return -EINVAL; |
b6ce4083 VL |
887 | if (!acpi_battery_present(battery)) { |
888 | result = -ENODEV; | |
889 | goto end; | |
890 | } | |
b6ce4083 VL |
891 | if (copy_from_user(alarm_string, buffer, count)) { |
892 | result = -EFAULT; | |
893 | goto end; | |
894 | } | |
1da177e4 | 895 | alarm_string[count] = '\0'; |
f1d4661a | 896 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 897 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 898 | end: |
b6ce4083 | 899 | if (!result) |
f1d4661a | 900 | return count; |
78490d82 AS |
901 | return result; |
902 | } | |
903 | ||
904 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
905 | |
906 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
907 | acpi_battery_print_info, | |
908 | acpi_battery_print_state, | |
909 | acpi_battery_print_alarm, | |
78490d82 | 910 | }; |
b6ce4083 | 911 | |
78490d82 AS |
912 | static int acpi_battery_read(int fid, struct seq_file *seq) |
913 | { | |
914 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 915 | int result = acpi_battery_update(battery); |
aa650bbd | 916 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
917 | } |
918 | ||
aa650bbd AS |
919 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
920 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
921 | { \ | |
922 | return acpi_battery_read(_name##_tag, seq); \ | |
923 | } \ | |
924 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
925 | { \ | |
d9dda78b | 926 | return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \ |
78490d82 AS |
927 | } |
928 | ||
aa650bbd AS |
929 | DECLARE_FILE_FUNCTIONS(info); |
930 | DECLARE_FILE_FUNCTIONS(state); | |
931 | DECLARE_FILE_FUNCTIONS(alarm); | |
932 | ||
933 | #undef DECLARE_FILE_FUNCTIONS | |
934 | ||
935 | #define FILE_DESCRIPTION_RO(_name) \ | |
936 | { \ | |
937 | .name = __stringify(_name), \ | |
938 | .mode = S_IRUGO, \ | |
939 | .ops = { \ | |
940 | .open = acpi_battery_##_name##_open_fs, \ | |
941 | .read = seq_read, \ | |
942 | .llseek = seq_lseek, \ | |
943 | .release = single_release, \ | |
944 | .owner = THIS_MODULE, \ | |
945 | }, \ | |
946 | } | |
78490d82 | 947 | |
aa650bbd AS |
948 | #define FILE_DESCRIPTION_RW(_name) \ |
949 | { \ | |
950 | .name = __stringify(_name), \ | |
951 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
952 | .ops = { \ | |
953 | .open = acpi_battery_##_name##_open_fs, \ | |
954 | .read = seq_read, \ | |
955 | .llseek = seq_lseek, \ | |
956 | .write = acpi_battery_write_##_name, \ | |
957 | .release = single_release, \ | |
958 | .owner = THIS_MODULE, \ | |
959 | }, \ | |
960 | } | |
1da177e4 | 961 | |
9c8b04be | 962 | static const struct battery_file { |
78490d82 | 963 | struct file_operations ops; |
d161a13f | 964 | umode_t mode; |
070d8eb1 | 965 | const char *name; |
78490d82 | 966 | } acpi_battery_file[] = { |
aa650bbd AS |
967 | FILE_DESCRIPTION_RO(info), |
968 | FILE_DESCRIPTION_RO(state), | |
969 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
970 | }; |
971 | ||
aa650bbd AS |
972 | #undef FILE_DESCRIPTION_RO |
973 | #undef FILE_DESCRIPTION_RW | |
974 | ||
4be44fcd | 975 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 976 | { |
4be44fcd | 977 | struct proc_dir_entry *entry = NULL; |
78490d82 | 978 | int i; |
1da177e4 | 979 | |
6d855fcd ZR |
980 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," |
981 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1da177e4 LT |
982 | if (!acpi_device_dir(device)) { |
983 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 984 | acpi_battery_dir); |
1da177e4 | 985 | if (!acpi_device_dir(device)) |
d550d98d | 986 | return -ENODEV; |
1da177e4 LT |
987 | } |
988 | ||
78490d82 | 989 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
cf7acfab DL |
990 | entry = proc_create_data(acpi_battery_file[i].name, |
991 | acpi_battery_file[i].mode, | |
992 | acpi_device_dir(device), | |
993 | &acpi_battery_file[i].ops, | |
994 | acpi_driver_data(device)); | |
78490d82 AS |
995 | if (!entry) |
996 | return -ENODEV; | |
1da177e4 | 997 | } |
d550d98d | 998 | return 0; |
1da177e4 LT |
999 | } |
1000 | ||
aa650bbd | 1001 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 1002 | { |
78490d82 | 1003 | int i; |
aa650bbd AS |
1004 | if (!acpi_device_dir(device)) |
1005 | return; | |
1006 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
1007 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 1008 | acpi_device_dir(device)); |
1da177e4 | 1009 | |
aa650bbd AS |
1010 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
1011 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
1012 | } |
1013 | ||
d7380965 | 1014 | #endif |
3e58ea0d | 1015 | |
1da177e4 LT |
1016 | /* -------------------------------------------------------------------------- |
1017 | Driver Interface | |
1018 | -------------------------------------------------------------------------- */ | |
1019 | ||
d9406691 | 1020 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1021 | { |
d9406691 | 1022 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 1023 | struct device *old; |
d9406691 | 1024 | |
1da177e4 | 1025 | if (!battery) |
d550d98d | 1026 | return; |
153e500f | 1027 | old = battery->bat.dev; |
da8aeb92 RW |
1028 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1029 | acpi_battery_refresh(battery); | |
f1d4661a | 1030 | acpi_battery_update(battery); |
f1d4661a | 1031 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1032 | dev_name(&device->dev), event, |
9ea7d575 | 1033 | acpi_battery_present(battery)); |
2345baf4 | 1034 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 1035 | if (old && battery->bat.dev) |
f79e1cec | 1036 | power_supply_changed(&battery->bat); |
1da177e4 LT |
1037 | } |
1038 | ||
25be5821 KM |
1039 | static int battery_notify(struct notifier_block *nb, |
1040 | unsigned long mode, void *_unused) | |
1041 | { | |
1042 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1043 | pm_nb); | |
1044 | switch (mode) { | |
d5a5911b | 1045 | case PM_POST_HIBERNATION: |
25be5821 | 1046 | case PM_POST_SUSPEND: |
6e17fb6a LT |
1047 | if (battery->bat.dev) { |
1048 | sysfs_remove_battery(battery); | |
1049 | sysfs_add_battery(battery); | |
1050 | } | |
25be5821 KM |
1051 | break; |
1052 | } | |
1053 | ||
1054 | return 0; | |
1055 | } | |
1056 | ||
4be44fcd | 1057 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1058 | { |
4be44fcd | 1059 | int result = 0; |
4be44fcd | 1060 | struct acpi_battery *battery = NULL; |
952c63e9 | 1061 | |
1da177e4 | 1062 | if (!device) |
d550d98d | 1063 | return -EINVAL; |
36bcbec7 | 1064 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1065 | if (!battery) |
d550d98d | 1066 | return -ENOMEM; |
145def84 | 1067 | battery->device = device; |
1da177e4 LT |
1068 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1069 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1070 | device->driver_data = battery; |
038fdea2 | 1071 | mutex_init(&battery->lock); |
69d94ec6 | 1072 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1073 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1074 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
eb03cb02 SH |
1075 | result = acpi_battery_update(battery); |
1076 | if (result) | |
1077 | goto fail; | |
fdcedbba | 1078 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 1079 | result = acpi_battery_add_fs(device); |
d7380965 | 1080 | #endif |
e80bba4b | 1081 | if (result) { |
fdcedbba | 1082 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 1083 | acpi_battery_remove_fs(device); |
d7380965 | 1084 | #endif |
e80bba4b | 1085 | goto fail; |
1da177e4 | 1086 | } |
25be5821 | 1087 | |
e80bba4b SH |
1088 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1089 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1090 | device->status.battery_present ? "present" : "absent"); | |
1091 | ||
25be5821 KM |
1092 | battery->pm_nb.notifier_call = battery_notify; |
1093 | register_pm_notifier(&battery->pm_nb); | |
1094 | ||
d550d98d | 1095 | return result; |
e80bba4b SH |
1096 | |
1097 | fail: | |
1098 | sysfs_remove_battery(battery); | |
1099 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1100 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1101 | kfree(battery); |
1102 | return result; | |
1da177e4 LT |
1103 | } |
1104 | ||
51fac838 | 1105 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1106 | { |
4be44fcd | 1107 | struct acpi_battery *battery = NULL; |
1da177e4 | 1108 | |
1da177e4 | 1109 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1110 | return -EINVAL; |
50dd0969 | 1111 | battery = acpi_driver_data(device); |
25be5821 | 1112 | unregister_pm_notifier(&battery->pm_nb); |
fdcedbba | 1113 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 1114 | acpi_battery_remove_fs(device); |
d7380965 | 1115 | #endif |
508df92d | 1116 | sysfs_remove_battery(battery); |
038fdea2 | 1117 | mutex_destroy(&battery->lock); |
69d94ec6 | 1118 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1119 | kfree(battery); |
d550d98d | 1120 | return 0; |
1da177e4 LT |
1121 | } |
1122 | ||
90692404 | 1123 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1124 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1125 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1126 | { |
1127 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1128 | |
1129 | if (!dev) | |
34c4415a | 1130 | return -EINVAL; |
a6f50dc8 RW |
1131 | |
1132 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1133 | if (!battery) | |
1134 | return -EINVAL; | |
1135 | ||
f1d4661a | 1136 | battery->update_time = 0; |
508df92d | 1137 | acpi_battery_update(battery); |
b6ce4083 | 1138 | return 0; |
34c4415a | 1139 | } |
90692404 | 1140 | #endif |
34c4415a | 1141 | |
a6f50dc8 RW |
1142 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1143 | ||
aa650bbd AS |
1144 | static struct acpi_driver acpi_battery_driver = { |
1145 | .name = "battery", | |
1146 | .class = ACPI_BATTERY_CLASS, | |
1147 | .ids = battery_device_ids, | |
d9406691 | 1148 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1149 | .ops = { |
1150 | .add = acpi_battery_add, | |
aa650bbd | 1151 | .remove = acpi_battery_remove, |
d9406691 | 1152 | .notify = acpi_battery_notify, |
aa650bbd | 1153 | }, |
a6f50dc8 | 1154 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1155 | }; |
1156 | ||
b0cbc861 | 1157 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1158 | { |
4d8316d5 | 1159 | if (acpi_disabled) |
0f66af53 | 1160 | return; |
fdcedbba | 1161 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1162 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 1163 | if (!acpi_battery_dir) |
0f66af53 | 1164 | return; |
d7380965 | 1165 | #endif |
aa650bbd | 1166 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 1167 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1168 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 1169 | #endif |
0f66af53 | 1170 | return; |
1da177e4 | 1171 | } |
0f66af53 AV |
1172 | return; |
1173 | } | |
1174 | ||
1175 | static int __init acpi_battery_init(void) | |
1176 | { | |
1177 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 1178 | return 0; |
1da177e4 LT |
1179 | } |
1180 | ||
4be44fcd | 1181 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1182 | { |
1da177e4 | 1183 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 1184 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1185 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 1186 | #endif |
1da177e4 LT |
1187 | } |
1188 | ||
1da177e4 LT |
1189 | module_init(acpi_battery_init); |
1190 | module_exit(acpi_battery_exit); |