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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 | |
3a670cc7 LT |
39 | #ifdef CONFIG_ACPI_PROCFS_POWER |
40 | #include <linux/proc_fs.h> | |
41 | #include <linux/seq_file.h> | |
42 | #include <asm/uaccess.h> | |
43 | #endif | |
44 | ||
8b48463f | 45 | #include <linux/acpi.h> |
d7380965 AS |
46 | #include <linux/power_supply.h> |
47 | ||
f03be352 AM |
48 | #include "battery.h" |
49 | ||
a192a958 LB |
50 | #define PREFIX "ACPI: " |
51 | ||
1da177e4 LT |
52 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
53 | ||
1da177e4 | 54 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 | 55 | |
ae6f6187 LT |
56 | /* Battery power unit: 0 means mW, 1 means mA */ |
57 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
58 | ||
1ac5aaa6 ZR |
59 | #define ACPI_BATTERY_STATE_DISCHARGING 0x1 |
60 | #define ACPI_BATTERY_STATE_CHARGING 0x2 | |
61 | #define ACPI_BATTERY_STATE_CRITICAL 0x4 | |
62 | ||
1da177e4 | 63 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 64 | |
f52fd66d | 65 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 66 | |
f52fd66d | 67 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 68 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 69 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
70 | MODULE_LICENSE("GPL"); |
71 | ||
a90b4038 | 72 | static int battery_bix_broken_package; |
f1d4661a AS |
73 | static unsigned int cache_time = 1000; |
74 | module_param(cache_time, uint, 0644); | |
75 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 76 | |
3a670cc7 LT |
77 | #ifdef CONFIG_ACPI_PROCFS_POWER |
78 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); | |
79 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
80 | ||
81 | enum acpi_battery_files { | |
82 | info_tag = 0, | |
83 | state_tag, | |
84 | alarm_tag, | |
85 | ACPI_BATTERY_NUMFILES, | |
86 | }; | |
87 | ||
88 | #endif | |
89 | ||
1ba90e3a TR |
90 | static const struct acpi_device_id battery_device_ids[] = { |
91 | {"PNP0C0A", 0}, | |
92 | {"", 0}, | |
93 | }; | |
1ba90e3a | 94 | |
aa650bbd | 95 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 96 | |
7b3bcc4a AS |
97 | enum { |
98 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 99 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 100 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
101 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
102 | switches between mWh and mAh depending on whether the system | |
103 | is running on battery or not. When mAh is the unit, most | |
104 | reported values are incorrect and need to be adjusted by | |
105 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
106 | Pre-2010 and 2012 models appear to always report in mWh and | |
107 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
108 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
109 | the 2011 models that fixes the issue (tested on x220 with a | |
110 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
111 | available for the 2010 models. */ | |
112 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
7b3bcc4a | 113 | }; |
78490d82 | 114 | |
1da177e4 | 115 | struct acpi_battery { |
038fdea2 | 116 | struct mutex lock; |
69d94ec6 | 117 | struct mutex sysfs_lock; |
d7380965 | 118 | struct power_supply bat; |
f1d4661a | 119 | struct acpi_device *device; |
25be5821 | 120 | struct notifier_block pm_nb; |
f1d4661a | 121 | unsigned long update_time; |
016d5baa | 122 | int revision; |
7faa144a | 123 | int rate_now; |
d7380965 AS |
124 | int capacity_now; |
125 | int voltage_now; | |
038fdea2 | 126 | int design_capacity; |
d7380965 | 127 | int full_charge_capacity; |
038fdea2 AS |
128 | int technology; |
129 | int design_voltage; | |
130 | int design_capacity_warning; | |
131 | int design_capacity_low; | |
c67fcd67 AS |
132 | int cycle_count; |
133 | int measurement_accuracy; | |
134 | int max_sampling_time; | |
135 | int min_sampling_time; | |
136 | int max_averaging_interval; | |
137 | int min_averaging_interval; | |
038fdea2 AS |
138 | int capacity_granularity_1; |
139 | int capacity_granularity_2; | |
f1d4661a | 140 | int alarm; |
038fdea2 AS |
141 | char model_number[32]; |
142 | char serial_number[32]; | |
143 | char type[32]; | |
144 | char oem_info[32]; | |
f1d4661a AS |
145 | int state; |
146 | int power_unit; | |
7b3bcc4a | 147 | unsigned long flags; |
1da177e4 LT |
148 | }; |
149 | ||
497888cf | 150 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
d7380965 | 151 | |
efd941f1 | 152 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 153 | { |
78490d82 AS |
154 | return battery->device->status.battery_present; |
155 | } | |
038fdea2 | 156 | |
d7380965 AS |
157 | static int acpi_battery_technology(struct acpi_battery *battery) |
158 | { | |
159 | if (!strcasecmp("NiCd", battery->type)) | |
160 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
161 | if (!strcasecmp("NiMH", battery->type)) | |
162 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
163 | if (!strcasecmp("LION", battery->type)) | |
164 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 165 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 166 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
167 | if (!strcasecmp("LiP", battery->type)) |
168 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
169 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
170 | } | |
171 | ||
9104476e | 172 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 173 | |
56f382a0 RH |
174 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
175 | { | |
1ac5aaa6 | 176 | /* charging, discharging or critical low */ |
56f382a0 RH |
177 | if (battery->state != 0) |
178 | return 0; | |
179 | ||
180 | /* battery not reporting charge */ | |
181 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
182 | battery->capacity_now == 0) | |
183 | return 0; | |
184 | ||
185 | /* good batteries update full_charge as the batteries degrade */ | |
186 | if (battery->full_charge_capacity == battery->capacity_now) | |
187 | return 1; | |
188 | ||
189 | /* fallback to using design values for broken batteries */ | |
190 | if (battery->design_capacity == battery->capacity_now) | |
191 | return 1; | |
192 | ||
193 | /* we don't do any sort of metric based on percentages */ | |
194 | return 0; | |
195 | } | |
196 | ||
d7380965 AS |
197 | static int acpi_battery_get_property(struct power_supply *psy, |
198 | enum power_supply_property psp, | |
199 | union power_supply_propval *val) | |
200 | { | |
a1b4bd69 | 201 | int ret = 0; |
d7380965 AS |
202 | struct acpi_battery *battery = to_acpi_battery(psy); |
203 | ||
9104476e AS |
204 | if (acpi_battery_present(battery)) { |
205 | /* run battery update only if it is present */ | |
206 | acpi_battery_get_state(battery); | |
207 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
208 | return -ENODEV; |
209 | switch (psp) { | |
210 | case POWER_SUPPLY_PROP_STATUS: | |
1ac5aaa6 | 211 | if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) |
d7380965 | 212 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
1ac5aaa6 | 213 | else if (battery->state & ACPI_BATTERY_STATE_CHARGING) |
d7380965 | 214 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
56f382a0 | 215 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 216 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
217 | else |
218 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
219 | break; |
220 | case POWER_SUPPLY_PROP_PRESENT: | |
221 | val->intval = acpi_battery_present(battery); | |
222 | break; | |
223 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
224 | val->intval = acpi_battery_technology(battery); | |
225 | break; | |
c67fcd67 AS |
226 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
227 | val->intval = battery->cycle_count; | |
228 | break; | |
d7380965 | 229 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
230 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
231 | ret = -ENODEV; | |
232 | else | |
233 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
234 | break; |
235 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
236 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
237 | ret = -ENODEV; | |
238 | else | |
239 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
240 | break; |
241 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 242 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
243 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
244 | ret = -ENODEV; | |
245 | else | |
246 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
247 | break; |
248 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
249 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
250 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
251 | ret = -ENODEV; | |
252 | else | |
253 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
254 | break; |
255 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
256 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
257 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
258 | ret = -ENODEV; | |
259 | else | |
260 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
261 | break; |
262 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
263 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
264 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
265 | ret = -ENODEV; | |
266 | else | |
267 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 268 | break; |
a58e1150 | 269 | case POWER_SUPPLY_PROP_CAPACITY: |
270 | if (battery->capacity_now && battery->full_charge_capacity) | |
271 | val->intval = battery->capacity_now * 100/ | |
272 | battery->full_charge_capacity; | |
273 | else | |
274 | val->intval = 0; | |
275 | break; | |
1ac5aaa6 ZR |
276 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
277 | if (battery->state & ACPI_BATTERY_STATE_CRITICAL) | |
278 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
279 | else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
280 | (battery->capacity_now <= battery->alarm)) | |
281 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
282 | else if (acpi_battery_is_charged(battery)) | |
283 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
284 | else | |
285 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
286 | break; | |
d7380965 AS |
287 | case POWER_SUPPLY_PROP_MODEL_NAME: |
288 | val->strval = battery->model_number; | |
289 | break; | |
290 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
291 | val->strval = battery->oem_info; | |
292 | break; | |
7c2670bb | 293 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
294 | val->strval = battery->serial_number; | |
295 | break; | |
d7380965 | 296 | default: |
a1b4bd69 | 297 | ret = -EINVAL; |
d7380965 | 298 | } |
a1b4bd69 | 299 | return ret; |
d7380965 AS |
300 | } |
301 | ||
302 | static enum power_supply_property charge_battery_props[] = { | |
303 | POWER_SUPPLY_PROP_STATUS, | |
304 | POWER_SUPPLY_PROP_PRESENT, | |
305 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 306 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
307 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
308 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
309 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
310 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
311 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
312 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 313 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 314 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
315 | POWER_SUPPLY_PROP_MODEL_NAME, |
316 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 317 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
318 | }; |
319 | ||
320 | static enum power_supply_property energy_battery_props[] = { | |
321 | POWER_SUPPLY_PROP_STATUS, | |
322 | POWER_SUPPLY_PROP_PRESENT, | |
323 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 324 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
325 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
326 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 327 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
328 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
329 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
330 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 331 | POWER_SUPPLY_PROP_CAPACITY, |
1ac5aaa6 | 332 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
d7380965 AS |
333 | POWER_SUPPLY_PROP_MODEL_NAME, |
334 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 335 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
336 | }; |
337 | ||
3a670cc7 LT |
338 | #ifdef CONFIG_ACPI_PROCFS_POWER |
339 | inline char *acpi_battery_units(struct acpi_battery *battery) | |
340 | { | |
341 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? | |
342 | "mA" : "mW"; | |
343 | } | |
344 | #endif | |
345 | ||
78490d82 AS |
346 | /* -------------------------------------------------------------------------- |
347 | Battery Management | |
348 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
349 | struct acpi_offsets { |
350 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
351 | u8 mode; /* int or string? */ | |
352 | }; | |
b6ce4083 | 353 | |
038fdea2 AS |
354 | static struct acpi_offsets state_offsets[] = { |
355 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 356 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
357 | {offsetof(struct acpi_battery, capacity_now), 0}, |
358 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 359 | }; |
b6ce4083 | 360 | |
038fdea2 AS |
361 | static struct acpi_offsets info_offsets[] = { |
362 | {offsetof(struct acpi_battery, power_unit), 0}, | |
363 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 364 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
365 | {offsetof(struct acpi_battery, technology), 0}, |
366 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
367 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
368 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
369 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
370 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
371 | {offsetof(struct acpi_battery, model_number), 1}, | |
372 | {offsetof(struct acpi_battery, serial_number), 1}, | |
373 | {offsetof(struct acpi_battery, type), 1}, | |
374 | {offsetof(struct acpi_battery, oem_info), 1}, | |
375 | }; | |
b6ce4083 | 376 | |
c67fcd67 | 377 | static struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 378 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
379 | {offsetof(struct acpi_battery, power_unit), 0}, |
380 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
381 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
382 | {offsetof(struct acpi_battery, technology), 0}, | |
383 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
384 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
385 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
386 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
387 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
388 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
389 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
390 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
391 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
392 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
393 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
394 | {offsetof(struct acpi_battery, model_number), 1}, | |
395 | {offsetof(struct acpi_battery, serial_number), 1}, | |
396 | {offsetof(struct acpi_battery, type), 1}, | |
397 | {offsetof(struct acpi_battery, oem_info), 1}, | |
398 | }; | |
399 | ||
038fdea2 AS |
400 | static int extract_package(struct acpi_battery *battery, |
401 | union acpi_object *package, | |
402 | struct acpi_offsets *offsets, int num) | |
403 | { | |
106449e8 | 404 | int i; |
038fdea2 AS |
405 | union acpi_object *element; |
406 | if (package->type != ACPI_TYPE_PACKAGE) | |
407 | return -EFAULT; | |
408 | for (i = 0; i < num; ++i) { | |
409 | if (package->package.count <= i) | |
410 | return -EFAULT; | |
411 | element = &package->package.elements[i]; | |
412 | if (offsets[i].mode) { | |
106449e8 AS |
413 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
414 | if (element->type == ACPI_TYPE_STRING || | |
415 | element->type == ACPI_TYPE_BUFFER) | |
416 | strncpy(ptr, element->string.pointer, 32); | |
417 | else if (element->type == ACPI_TYPE_INTEGER) { | |
418 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
419 | sizeof(u64)); |
420 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
421 | } else |
422 | *ptr = 0; /* don't have value */ | |
038fdea2 | 423 | } else { |
b8a1bdb1 AS |
424 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
425 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
426 | element->integer.value : -1; | |
038fdea2 | 427 | } |
b6ce4083 | 428 | } |
b6ce4083 VL |
429 | return 0; |
430 | } | |
431 | ||
432 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
433 | { | |
aa650bbd | 434 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
435 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
436 | return -ENODEV; | |
437 | } | |
aa650bbd | 438 | return 0; |
b6ce4083 VL |
439 | } |
440 | ||
441 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 442 | { |
aa650bbd | 443 | int result = -EFAULT; |
4be44fcd | 444 | acpi_status status = 0; |
0f4c6547 | 445 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? |
c67fcd67 AS |
446 | "_BIX" : "_BIF"; |
447 | ||
4be44fcd | 448 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 449 | |
b6ce4083 VL |
450 | if (!acpi_battery_present(battery)) |
451 | return 0; | |
038fdea2 | 452 | mutex_lock(&battery->lock); |
c67fcd67 AS |
453 | status = acpi_evaluate_object(battery->device->handle, name, |
454 | NULL, &buffer); | |
038fdea2 | 455 | mutex_unlock(&battery->lock); |
aa650bbd | 456 | |
1da177e4 | 457 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 458 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 459 | return -ENODEV; |
1da177e4 | 460 | } |
a90b4038 LT |
461 | |
462 | if (battery_bix_broken_package) | |
463 | result = extract_package(battery, buffer.pointer, | |
464 | extended_info_offsets + 1, | |
465 | ARRAY_SIZE(extended_info_offsets) - 1); | |
466 | else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) | |
c67fcd67 AS |
467 | result = extract_package(battery, buffer.pointer, |
468 | extended_info_offsets, | |
469 | ARRAY_SIZE(extended_info_offsets)); | |
470 | else | |
471 | result = extract_package(battery, buffer.pointer, | |
472 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 473 | kfree(buffer.pointer); |
557d5868 ZR |
474 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
475 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
476 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
477 | battery->power_unit && battery->design_voltage) { | |
478 | battery->design_capacity = battery->design_capacity * | |
479 | 10000 / battery->design_voltage; | |
480 | battery->full_charge_capacity = battery->full_charge_capacity * | |
481 | 10000 / battery->design_voltage; | |
482 | battery->design_capacity_warning = | |
483 | battery->design_capacity_warning * | |
484 | 10000 / battery->design_voltage; | |
485 | /* Curiously, design_capacity_low, unlike the rest of them, | |
486 | is correct. */ | |
487 | /* capacity_granularity_* equal 1 on the systems tested, so | |
488 | it's impossible to tell if they would need an adjustment | |
489 | or not if their values were higher. */ | |
490 | } | |
d550d98d | 491 | return result; |
1da177e4 LT |
492 | } |
493 | ||
b6ce4083 | 494 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 495 | { |
4be44fcd LB |
496 | int result = 0; |
497 | acpi_status status = 0; | |
498 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 499 | |
b6ce4083 VL |
500 | if (!acpi_battery_present(battery)) |
501 | return 0; | |
1da177e4 | 502 | |
f1d4661a AS |
503 | if (battery->update_time && |
504 | time_before(jiffies, battery->update_time + | |
505 | msecs_to_jiffies(cache_time))) | |
506 | return 0; | |
507 | ||
038fdea2 | 508 | mutex_lock(&battery->lock); |
f1d4661a | 509 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
510 | NULL, &buffer); |
511 | mutex_unlock(&battery->lock); | |
5b31d895 | 512 | |
1da177e4 | 513 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 514 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 515 | return -ENODEV; |
1da177e4 | 516 | } |
aa650bbd | 517 | |
038fdea2 AS |
518 | result = extract_package(battery, buffer.pointer, |
519 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 520 | battery->update_time = jiffies; |
78490d82 | 521 | kfree(buffer.pointer); |
bc76f90b | 522 | |
55003b21 LT |
523 | /* For buggy DSDTs that report negative 16-bit values for either |
524 | * charging or discharging current and/or report 0 as 65536 | |
525 | * due to bad math. | |
526 | */ | |
527 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
528 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
529 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 530 | battery->rate_now = abs((s16)battery->rate_now); |
55003b21 LT |
531 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
532 | " invalid.\n"); | |
533 | } | |
bc76f90b | 534 | |
557d5868 ZR |
535 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
536 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
537 | battery->capacity_now = (battery->capacity_now * | |
538 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
539 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
540 | battery->power_unit && battery->design_voltage) { | |
541 | battery->capacity_now = battery->capacity_now * | |
542 | 10000 / battery->design_voltage; | |
543 | } | |
b6ce4083 VL |
544 | return result; |
545 | } | |
1da177e4 | 546 | |
aa650bbd | 547 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 548 | { |
4be44fcd | 549 | acpi_status status = 0; |
1da177e4 | 550 | |
c67fcd67 | 551 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 552 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 553 | return -ENODEV; |
1da177e4 | 554 | |
038fdea2 | 555 | mutex_lock(&battery->lock); |
0db98202 JL |
556 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
557 | battery->alarm); | |
038fdea2 | 558 | mutex_unlock(&battery->lock); |
aa650bbd | 559 | |
1da177e4 | 560 | if (ACPI_FAILURE(status)) |
d550d98d | 561 | return -ENODEV; |
1da177e4 | 562 | |
aa650bbd | 563 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 564 | return 0; |
1da177e4 LT |
565 | } |
566 | ||
b6ce4083 | 567 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 568 | { |
b6ce4083 | 569 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 570 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 571 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 572 | return 0; |
b6ce4083 | 573 | } |
7b3bcc4a | 574 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
575 | if (!battery->alarm) |
576 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 577 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 578 | } |
1da177e4 | 579 | |
508df92d AB |
580 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
581 | struct device_attribute *attr, | |
582 | char *buf) | |
583 | { | |
584 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
585 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
586 | } | |
587 | ||
588 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
589 | struct device_attribute *attr, | |
590 | const char *buf, size_t count) | |
591 | { | |
592 | unsigned long x; | |
593 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 594 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
595 | battery->alarm = x/1000; |
596 | if (acpi_battery_present(battery)) | |
597 | acpi_battery_set_alarm(battery); | |
598 | return count; | |
599 | } | |
600 | ||
601 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 602 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
603 | .show = acpi_battery_alarm_show, |
604 | .store = acpi_battery_alarm_store, | |
605 | }; | |
606 | ||
607 | static int sysfs_add_battery(struct acpi_battery *battery) | |
608 | { | |
609 | int result; | |
610 | ||
ae6f6187 | 611 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
508df92d AB |
612 | battery->bat.properties = charge_battery_props; |
613 | battery->bat.num_properties = | |
614 | ARRAY_SIZE(charge_battery_props); | |
615 | } else { | |
616 | battery->bat.properties = energy_battery_props; | |
617 | battery->bat.num_properties = | |
618 | ARRAY_SIZE(energy_battery_props); | |
619 | } | |
620 | ||
621 | battery->bat.name = acpi_device_bid(battery->device); | |
622 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
623 | battery->bat.get_property = acpi_battery_get_property; | |
624 | ||
e0d1f09e ZR |
625 | result = power_supply_register_no_ws(&battery->device->dev, &battery->bat); |
626 | ||
508df92d AB |
627 | if (result) |
628 | return result; | |
629 | return device_create_file(battery->bat.dev, &alarm_attr); | |
630 | } | |
631 | ||
632 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
633 | { | |
69d94ec6 | 634 | mutex_lock(&battery->sysfs_lock); |
9c921c22 | 635 | if (!battery->bat.dev) { |
69d94ec6 | 636 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 637 | return; |
9c921c22 LT |
638 | } |
639 | ||
508df92d AB |
640 | device_remove_file(battery->bat.dev, &alarm_attr); |
641 | power_supply_unregister(&battery->bat); | |
9104476e | 642 | battery->bat.dev = NULL; |
69d94ec6 | 643 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
644 | } |
645 | ||
4000e626 KI |
646 | static void find_battery(const struct dmi_header *dm, void *private) |
647 | { | |
648 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
649 | /* Note: the hardcoded offsets below have been extracted from | |
650 | the source code of dmidecode. */ | |
651 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
652 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
653 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
654 | if (dm->length >= 18) | |
655 | dmi_capacity *= dmi_data[17]; | |
656 | if (battery->design_capacity * battery->design_voltage / 1000 | |
657 | != dmi_capacity && | |
658 | battery->design_capacity * 10 == dmi_capacity) | |
659 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
660 | &battery->flags); | |
661 | } | |
662 | } | |
663 | ||
557d5868 ZR |
664 | /* |
665 | * According to the ACPI spec, some kinds of primary batteries can | |
666 | * report percentage battery remaining capacity directly to OS. | |
667 | * In this case, it reports the Last Full Charged Capacity == 100 | |
668 | * and BatteryPresentRate == 0xFFFFFFFF. | |
669 | * | |
670 | * Now we found some battery reports percentage remaining capacity | |
671 | * even if it's rechargeable. | |
672 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
673 | * | |
674 | * Handle this correctly so that they won't break userspace. | |
675 | */ | |
7b78622d | 676 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
677 | { |
678 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 679 | return; |
557d5868 | 680 | |
0f4c6547 NM |
681 | if (battery->full_charge_capacity == 100 && |
682 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
683 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
684 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
685 | battery->full_charge_capacity = battery->design_capacity; | |
686 | battery->capacity_now = (battery->capacity_now * | |
687 | battery->full_charge_capacity) / 100; | |
688 | } | |
4000e626 KI |
689 | |
690 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 691 | return; |
4000e626 KI |
692 | |
693 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
694 | const char *s; | |
695 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
696 | if (s && !strnicmp(s, "ThinkPad", 8)) { | |
697 | dmi_walk(find_battery, battery); | |
698 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
699 | &battery->flags) && | |
700 | battery->design_voltage) { | |
701 | battery->design_capacity = | |
702 | battery->design_capacity * | |
703 | 10000 / battery->design_voltage; | |
704 | battery->full_charge_capacity = | |
705 | battery->full_charge_capacity * | |
706 | 10000 / battery->design_voltage; | |
707 | battery->design_capacity_warning = | |
708 | battery->design_capacity_warning * | |
709 | 10000 / battery->design_voltage; | |
710 | battery->capacity_now = battery->capacity_now * | |
711 | 10000 / battery->design_voltage; | |
712 | } | |
713 | } | |
714 | } | |
557d5868 ZR |
715 | } |
716 | ||
9e50bc14 | 717 | static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
b6ce4083 | 718 | { |
50b17851 | 719 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 720 | result = acpi_battery_get_status(battery); |
508df92d | 721 | if (result) |
b6ce4083 | 722 | return result; |
508df92d AB |
723 | if (!acpi_battery_present(battery)) { |
724 | sysfs_remove_battery(battery); | |
97749cd9 | 725 | battery->update_time = 0; |
508df92d | 726 | return 0; |
b6ce4083 | 727 | } |
9e50bc14 LT |
728 | |
729 | if (resume) | |
730 | return 0; | |
731 | ||
50b17851 AS |
732 | if (!battery->update_time || |
733 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
734 | result = acpi_battery_get_info(battery); |
735 | if (result) | |
736 | return result; | |
737 | acpi_battery_init_alarm(battery); | |
738 | } | |
eb03cb02 SH |
739 | if (!battery->bat.dev) { |
740 | result = sysfs_add_battery(battery); | |
741 | if (result) | |
742 | return result; | |
743 | } | |
557d5868 | 744 | result = acpi_battery_get_state(battery); |
e0d1f09e ZR |
745 | if (result) |
746 | return result; | |
7b78622d | 747 | acpi_battery_quirks(battery); |
e0d1f09e ZR |
748 | |
749 | /* | |
750 | * Wakeup the system if battery is critical low | |
751 | * or lower than the alarm level | |
752 | */ | |
753 | if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || | |
754 | (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && | |
755 | (battery->capacity_now <= battery->alarm))) | |
756 | pm_wakeup_event(&battery->device->dev, 0); | |
757 | ||
557d5868 | 758 | return result; |
4bd35cdb VL |
759 | } |
760 | ||
da8aeb92 RW |
761 | static void acpi_battery_refresh(struct acpi_battery *battery) |
762 | { | |
c5971456 AW |
763 | int power_unit; |
764 | ||
da8aeb92 RW |
765 | if (!battery->bat.dev) |
766 | return; | |
767 | ||
c5971456 AW |
768 | power_unit = battery->power_unit; |
769 | ||
da8aeb92 | 770 | acpi_battery_get_info(battery); |
c5971456 AW |
771 | |
772 | if (power_unit == battery->power_unit) | |
773 | return; | |
774 | ||
775 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
776 | sysfs_remove_battery(battery); |
777 | sysfs_add_battery(battery); | |
778 | } | |
779 | ||
3a670cc7 LT |
780 | /* -------------------------------------------------------------------------- |
781 | FS Interface (/proc) | |
782 | -------------------------------------------------------------------------- */ | |
783 | ||
784 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
785 | static struct proc_dir_entry *acpi_battery_dir; | |
786 | ||
787 | static int acpi_battery_print_info(struct seq_file *seq, int result) | |
788 | { | |
789 | struct acpi_battery *battery = seq->private; | |
790 | ||
791 | if (result) | |
792 | goto end; | |
793 | ||
794 | seq_printf(seq, "present: %s\n", | |
795 | acpi_battery_present(battery) ? "yes" : "no"); | |
796 | if (!acpi_battery_present(battery)) | |
797 | goto end; | |
798 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
799 | seq_printf(seq, "design capacity: unknown\n"); | |
800 | else | |
801 | seq_printf(seq, "design capacity: %d %sh\n", | |
802 | battery->design_capacity, | |
803 | acpi_battery_units(battery)); | |
804 | ||
805 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
806 | seq_printf(seq, "last full capacity: unknown\n"); | |
807 | else | |
808 | seq_printf(seq, "last full capacity: %d %sh\n", | |
809 | battery->full_charge_capacity, | |
810 | acpi_battery_units(battery)); | |
811 | ||
812 | seq_printf(seq, "battery technology: %srechargeable\n", | |
813 | (!battery->technology)?"non-":""); | |
814 | ||
815 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
816 | seq_printf(seq, "design voltage: unknown\n"); | |
817 | else | |
818 | seq_printf(seq, "design voltage: %d mV\n", | |
819 | battery->design_voltage); | |
820 | seq_printf(seq, "design capacity warning: %d %sh\n", | |
821 | battery->design_capacity_warning, | |
822 | acpi_battery_units(battery)); | |
823 | seq_printf(seq, "design capacity low: %d %sh\n", | |
824 | battery->design_capacity_low, | |
825 | acpi_battery_units(battery)); | |
826 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); | |
827 | seq_printf(seq, "capacity granularity 1: %d %sh\n", | |
828 | battery->capacity_granularity_1, | |
829 | acpi_battery_units(battery)); | |
830 | seq_printf(seq, "capacity granularity 2: %d %sh\n", | |
831 | battery->capacity_granularity_2, | |
832 | acpi_battery_units(battery)); | |
833 | seq_printf(seq, "model number: %s\n", battery->model_number); | |
834 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
835 | seq_printf(seq, "battery type: %s\n", battery->type); | |
836 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
837 | end: | |
838 | if (result) | |
839 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
840 | return result; | |
841 | } | |
842 | ||
843 | static int acpi_battery_print_state(struct seq_file *seq, int result) | |
844 | { | |
845 | struct acpi_battery *battery = seq->private; | |
846 | ||
847 | if (result) | |
848 | goto end; | |
849 | ||
850 | seq_printf(seq, "present: %s\n", | |
851 | acpi_battery_present(battery) ? "yes" : "no"); | |
852 | if (!acpi_battery_present(battery)) | |
853 | goto end; | |
854 | ||
855 | seq_printf(seq, "capacity state: %s\n", | |
856 | (battery->state & 0x04) ? "critical" : "ok"); | |
857 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
858 | seq_printf(seq, | |
859 | "charging state: charging/discharging\n"); | |
860 | else if (battery->state & 0x01) | |
861 | seq_printf(seq, "charging state: discharging\n"); | |
862 | else if (battery->state & 0x02) | |
863 | seq_printf(seq, "charging state: charging\n"); | |
864 | else | |
865 | seq_printf(seq, "charging state: charged\n"); | |
866 | ||
867 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
868 | seq_printf(seq, "present rate: unknown\n"); | |
869 | else | |
870 | seq_printf(seq, "present rate: %d %s\n", | |
871 | battery->rate_now, acpi_battery_units(battery)); | |
872 | ||
873 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
874 | seq_printf(seq, "remaining capacity: unknown\n"); | |
875 | else | |
876 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
877 | battery->capacity_now, acpi_battery_units(battery)); | |
878 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
879 | seq_printf(seq, "present voltage: unknown\n"); | |
880 | else | |
881 | seq_printf(seq, "present voltage: %d mV\n", | |
882 | battery->voltage_now); | |
883 | end: | |
884 | if (result) | |
885 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
886 | ||
887 | return result; | |
888 | } | |
889 | ||
890 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) | |
891 | { | |
892 | struct acpi_battery *battery = seq->private; | |
893 | ||
894 | if (result) | |
895 | goto end; | |
896 | ||
897 | if (!acpi_battery_present(battery)) { | |
898 | seq_printf(seq, "present: no\n"); | |
899 | goto end; | |
900 | } | |
901 | seq_printf(seq, "alarm: "); | |
902 | if (!battery->alarm) | |
903 | seq_printf(seq, "unsupported\n"); | |
904 | else | |
905 | seq_printf(seq, "%u %sh\n", battery->alarm, | |
906 | acpi_battery_units(battery)); | |
907 | end: | |
908 | if (result) | |
909 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
910 | return result; | |
911 | } | |
912 | ||
913 | static ssize_t acpi_battery_write_alarm(struct file *file, | |
914 | const char __user * buffer, | |
915 | size_t count, loff_t * ppos) | |
916 | { | |
917 | int result = 0; | |
918 | char alarm_string[12] = { '\0' }; | |
919 | struct seq_file *m = file->private_data; | |
920 | struct acpi_battery *battery = m->private; | |
921 | ||
922 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
923 | return -EINVAL; | |
924 | if (!acpi_battery_present(battery)) { | |
925 | result = -ENODEV; | |
926 | goto end; | |
927 | } | |
928 | if (copy_from_user(alarm_string, buffer, count)) { | |
929 | result = -EFAULT; | |
930 | goto end; | |
931 | } | |
932 | alarm_string[count] = '\0'; | |
933 | battery->alarm = simple_strtol(alarm_string, NULL, 0); | |
934 | result = acpi_battery_set_alarm(battery); | |
935 | end: | |
936 | if (!result) | |
937 | return count; | |
938 | return result; | |
939 | } | |
940 | ||
941 | typedef int(*print_func)(struct seq_file *seq, int result); | |
942 | ||
943 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
944 | acpi_battery_print_info, | |
945 | acpi_battery_print_state, | |
946 | acpi_battery_print_alarm, | |
947 | }; | |
948 | ||
949 | static int acpi_battery_read(int fid, struct seq_file *seq) | |
950 | { | |
951 | struct acpi_battery *battery = seq->private; | |
9e50bc14 | 952 | int result = acpi_battery_update(battery, false); |
3a670cc7 LT |
953 | return acpi_print_funcs[fid](seq, result); |
954 | } | |
955 | ||
956 | #define DECLARE_FILE_FUNCTIONS(_name) \ | |
957 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
958 | { \ | |
959 | return acpi_battery_read(_name##_tag, seq); \ | |
960 | } \ | |
961 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
962 | { \ | |
963 | return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \ | |
964 | } | |
965 | ||
966 | DECLARE_FILE_FUNCTIONS(info); | |
967 | DECLARE_FILE_FUNCTIONS(state); | |
968 | DECLARE_FILE_FUNCTIONS(alarm); | |
969 | ||
970 | #undef DECLARE_FILE_FUNCTIONS | |
971 | ||
972 | #define FILE_DESCRIPTION_RO(_name) \ | |
973 | { \ | |
974 | .name = __stringify(_name), \ | |
975 | .mode = S_IRUGO, \ | |
976 | .ops = { \ | |
977 | .open = acpi_battery_##_name##_open_fs, \ | |
978 | .read = seq_read, \ | |
979 | .llseek = seq_lseek, \ | |
980 | .release = single_release, \ | |
981 | .owner = THIS_MODULE, \ | |
982 | }, \ | |
983 | } | |
984 | ||
985 | #define FILE_DESCRIPTION_RW(_name) \ | |
986 | { \ | |
987 | .name = __stringify(_name), \ | |
988 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
989 | .ops = { \ | |
990 | .open = acpi_battery_##_name##_open_fs, \ | |
991 | .read = seq_read, \ | |
992 | .llseek = seq_lseek, \ | |
993 | .write = acpi_battery_write_##_name, \ | |
994 | .release = single_release, \ | |
995 | .owner = THIS_MODULE, \ | |
996 | }, \ | |
997 | } | |
998 | ||
999 | static const struct battery_file { | |
1000 | struct file_operations ops; | |
1001 | umode_t mode; | |
1002 | const char *name; | |
1003 | } acpi_battery_file[] = { | |
1004 | FILE_DESCRIPTION_RO(info), | |
1005 | FILE_DESCRIPTION_RO(state), | |
1006 | FILE_DESCRIPTION_RW(alarm), | |
1007 | }; | |
1008 | ||
1009 | #undef FILE_DESCRIPTION_RO | |
1010 | #undef FILE_DESCRIPTION_RW | |
1011 | ||
1012 | static int acpi_battery_add_fs(struct acpi_device *device) | |
1013 | { | |
1014 | struct proc_dir_entry *entry = NULL; | |
1015 | int i; | |
1016 | ||
1017 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," | |
1018 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1019 | if (!acpi_device_dir(device)) { | |
1020 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
1021 | acpi_battery_dir); | |
1022 | if (!acpi_device_dir(device)) | |
1023 | return -ENODEV; | |
1024 | } | |
1025 | ||
1026 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { | |
1027 | entry = proc_create_data(acpi_battery_file[i].name, | |
1028 | acpi_battery_file[i].mode, | |
1029 | acpi_device_dir(device), | |
1030 | &acpi_battery_file[i].ops, | |
1031 | acpi_driver_data(device)); | |
1032 | if (!entry) | |
1033 | return -ENODEV; | |
1034 | } | |
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | static void acpi_battery_remove_fs(struct acpi_device *device) | |
1039 | { | |
1040 | int i; | |
1041 | if (!acpi_device_dir(device)) | |
1042 | return; | |
1043 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
1044 | remove_proc_entry(acpi_battery_file[i].name, | |
1045 | acpi_device_dir(device)); | |
1046 | ||
1047 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
1048 | acpi_device_dir(device) = NULL; | |
1049 | } | |
1050 | ||
1051 | #endif | |
1052 | ||
1da177e4 LT |
1053 | /* -------------------------------------------------------------------------- |
1054 | Driver Interface | |
1055 | -------------------------------------------------------------------------- */ | |
1056 | ||
d9406691 | 1057 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1058 | { |
d9406691 | 1059 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 1060 | struct device *old; |
d9406691 | 1061 | |
1da177e4 | 1062 | if (!battery) |
d550d98d | 1063 | return; |
153e500f | 1064 | old = battery->bat.dev; |
da8aeb92 RW |
1065 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1066 | acpi_battery_refresh(battery); | |
9e50bc14 | 1067 | acpi_battery_update(battery, false); |
f1d4661a | 1068 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1069 | dev_name(&device->dev), event, |
9ea7d575 | 1070 | acpi_battery_present(battery)); |
411e0f77 | 1071 | acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
2345baf4 | 1072 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 1073 | if (old && battery->bat.dev) |
f79e1cec | 1074 | power_supply_changed(&battery->bat); |
1da177e4 LT |
1075 | } |
1076 | ||
25be5821 KM |
1077 | static int battery_notify(struct notifier_block *nb, |
1078 | unsigned long mode, void *_unused) | |
1079 | { | |
1080 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
1081 | pm_nb); | |
9e50bc14 LT |
1082 | int result; |
1083 | ||
25be5821 | 1084 | switch (mode) { |
d5a5911b | 1085 | case PM_POST_HIBERNATION: |
25be5821 | 1086 | case PM_POST_SUSPEND: |
9e50bc14 LT |
1087 | if (!acpi_battery_present(battery)) |
1088 | return 0; | |
1089 | ||
1090 | if (!battery->bat.dev) { | |
1091 | result = acpi_battery_get_info(battery); | |
1092 | if (result) | |
1093 | return result; | |
1094 | ||
1095 | result = sysfs_add_battery(battery); | |
1096 | if (result) | |
1097 | return result; | |
1098 | } else | |
1099 | acpi_battery_refresh(battery); | |
1100 | ||
1101 | acpi_battery_init_alarm(battery); | |
1102 | acpi_battery_get_state(battery); | |
25be5821 KM |
1103 | break; |
1104 | } | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
a90b4038 LT |
1109 | static struct dmi_system_id bat_dmi_table[] = { |
1110 | { | |
1111 | .ident = "NEC LZ750/LS", | |
1112 | .matches = { | |
1113 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
1114 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
1115 | }, | |
1116 | }, | |
1117 | {}, | |
1118 | }; | |
1119 | ||
4be44fcd | 1120 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 1121 | { |
4be44fcd | 1122 | int result = 0; |
4be44fcd | 1123 | struct acpi_battery *battery = NULL; |
952c63e9 | 1124 | |
1da177e4 | 1125 | if (!device) |
d550d98d | 1126 | return -EINVAL; |
36bcbec7 | 1127 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 1128 | if (!battery) |
d550d98d | 1129 | return -ENOMEM; |
145def84 | 1130 | battery->device = device; |
1da177e4 LT |
1131 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1132 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 1133 | device->driver_data = battery; |
038fdea2 | 1134 | mutex_init(&battery->lock); |
69d94ec6 | 1135 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 1136 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 1137 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
9e50bc14 | 1138 | result = acpi_battery_update(battery, false); |
eb03cb02 SH |
1139 | if (result) |
1140 | goto fail; | |
3a670cc7 LT |
1141 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1142 | result = acpi_battery_add_fs(device); | |
1143 | #endif | |
1144 | if (result) { | |
1145 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1146 | acpi_battery_remove_fs(device); | |
1147 | #endif | |
1148 | goto fail; | |
1149 | } | |
25be5821 | 1150 | |
e80bba4b SH |
1151 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1152 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1153 | device->status.battery_present ? "present" : "absent"); | |
1154 | ||
25be5821 KM |
1155 | battery->pm_nb.notifier_call = battery_notify; |
1156 | register_pm_notifier(&battery->pm_nb); | |
1157 | ||
e0d1f09e ZR |
1158 | device_init_wakeup(&device->dev, 1); |
1159 | ||
d550d98d | 1160 | return result; |
e80bba4b SH |
1161 | |
1162 | fail: | |
1163 | sysfs_remove_battery(battery); | |
1164 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1165 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1166 | kfree(battery); |
1167 | return result; | |
1da177e4 LT |
1168 | } |
1169 | ||
51fac838 | 1170 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 1171 | { |
4be44fcd | 1172 | struct acpi_battery *battery = NULL; |
1da177e4 | 1173 | |
1da177e4 | 1174 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1175 | return -EINVAL; |
e0d1f09e | 1176 | device_init_wakeup(&device->dev, 0); |
50dd0969 | 1177 | battery = acpi_driver_data(device); |
25be5821 | 1178 | unregister_pm_notifier(&battery->pm_nb); |
3a670cc7 LT |
1179 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1180 | acpi_battery_remove_fs(device); | |
1181 | #endif | |
508df92d | 1182 | sysfs_remove_battery(battery); |
038fdea2 | 1183 | mutex_destroy(&battery->lock); |
69d94ec6 | 1184 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1185 | kfree(battery); |
d550d98d | 1186 | return 0; |
1da177e4 LT |
1187 | } |
1188 | ||
90692404 | 1189 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 1190 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 1191 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
1192 | { |
1193 | struct acpi_battery *battery; | |
a6f50dc8 RW |
1194 | |
1195 | if (!dev) | |
34c4415a | 1196 | return -EINVAL; |
a6f50dc8 RW |
1197 | |
1198 | battery = acpi_driver_data(to_acpi_device(dev)); | |
1199 | if (!battery) | |
1200 | return -EINVAL; | |
1201 | ||
f1d4661a | 1202 | battery->update_time = 0; |
9e50bc14 | 1203 | acpi_battery_update(battery, true); |
b6ce4083 | 1204 | return 0; |
34c4415a | 1205 | } |
7f6895c6 SK |
1206 | #else |
1207 | #define acpi_battery_resume NULL | |
90692404 | 1208 | #endif |
34c4415a | 1209 | |
a6f50dc8 RW |
1210 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1211 | ||
aa650bbd AS |
1212 | static struct acpi_driver acpi_battery_driver = { |
1213 | .name = "battery", | |
1214 | .class = ACPI_BATTERY_CLASS, | |
1215 | .ids = battery_device_ids, | |
d9406691 | 1216 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1217 | .ops = { |
1218 | .add = acpi_battery_add, | |
aa650bbd | 1219 | .remove = acpi_battery_remove, |
d9406691 | 1220 | .notify = acpi_battery_notify, |
aa650bbd | 1221 | }, |
a6f50dc8 | 1222 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
1223 | }; |
1224 | ||
b0cbc861 | 1225 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1226 | { |
4d8316d5 | 1227 | if (acpi_disabled) |
0f66af53 | 1228 | return; |
a90b4038 LT |
1229 | |
1230 | if (dmi_check_system(bat_dmi_table)) | |
1231 | battery_bix_broken_package = 1; | |
3a670cc7 LT |
1232 | |
1233 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1234 | acpi_battery_dir = acpi_lock_battery_dir(); | |
1235 | if (!acpi_battery_dir) | |
1236 | return; | |
1237 | #endif | |
1238 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { | |
1239 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
1240 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1241 | #endif | |
1242 | return; | |
1243 | } | |
1244 | return; | |
0f66af53 AV |
1245 | } |
1246 | ||
1247 | static int __init acpi_battery_init(void) | |
1248 | { | |
1249 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 1250 | return 0; |
1da177e4 LT |
1251 | } |
1252 | ||
4be44fcd | 1253 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1254 | { |
1da177e4 | 1255 | acpi_bus_unregister_driver(&acpi_battery_driver); |
3a670cc7 LT |
1256 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1257 | acpi_unlock_battery_dir(acpi_battery_dir); | |
1258 | #endif | |
1da177e4 LT |
1259 | } |
1260 | ||
1da177e4 LT |
1261 | module_init(acpi_battery_init); |
1262 | module_exit(acpi_battery_exit); |