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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> |
d7380965 | 37 | |
fdcedbba | 38 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
39 | #include <linux/proc_fs.h> |
40 | #include <linux/seq_file.h> | |
41 | #include <asm/uaccess.h> | |
d7380965 | 42 | #endif |
1da177e4 LT |
43 | |
44 | #include <acpi/acpi_bus.h> | |
45 | #include <acpi/acpi_drivers.h> | |
d7380965 AS |
46 | #include <linux/power_supply.h> |
47 | ||
a192a958 LB |
48 | #define PREFIX "ACPI: " |
49 | ||
1da177e4 LT |
50 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
51 | ||
1da177e4 | 52 | #define ACPI_BATTERY_CLASS "battery" |
1da177e4 | 53 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
54 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
55 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
c67fcd67 | 56 | #define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82 |
1da177e4 | 57 | |
ae6f6187 LT |
58 | /* Battery power unit: 0 means mW, 1 means mA */ |
59 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
60 | ||
1da177e4 | 61 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 62 | |
f52fd66d | 63 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 64 | |
f52fd66d | 65 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 66 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 67 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
68 | MODULE_LICENSE("GPL"); |
69 | ||
f1d4661a AS |
70 | static unsigned int cache_time = 1000; |
71 | module_param(cache_time, uint, 0644); | |
72 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 73 | |
fdcedbba | 74 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
75 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
76 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
77 | ||
d7380965 AS |
78 | enum acpi_battery_files { |
79 | info_tag = 0, | |
80 | state_tag, | |
81 | alarm_tag, | |
82 | ACPI_BATTERY_NUMFILES, | |
83 | }; | |
84 | ||
85 | #endif | |
86 | ||
1ba90e3a TR |
87 | static const struct acpi_device_id battery_device_ids[] = { |
88 | {"PNP0C0A", 0}, | |
89 | {"", 0}, | |
90 | }; | |
1ba90e3a | 91 | |
aa650bbd | 92 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 93 | |
7b3bcc4a AS |
94 | enum { |
95 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 96 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 97 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
7b3bcc4a | 98 | }; |
78490d82 | 99 | |
1da177e4 | 100 | struct acpi_battery { |
038fdea2 | 101 | struct mutex lock; |
69d94ec6 | 102 | struct mutex sysfs_lock; |
d7380965 | 103 | struct power_supply bat; |
f1d4661a | 104 | struct acpi_device *device; |
25be5821 | 105 | struct notifier_block pm_nb; |
f1d4661a | 106 | unsigned long update_time; |
7faa144a | 107 | int rate_now; |
d7380965 AS |
108 | int capacity_now; |
109 | int voltage_now; | |
038fdea2 | 110 | int design_capacity; |
d7380965 | 111 | int full_charge_capacity; |
038fdea2 AS |
112 | int technology; |
113 | int design_voltage; | |
114 | int design_capacity_warning; | |
115 | int design_capacity_low; | |
c67fcd67 AS |
116 | int cycle_count; |
117 | int measurement_accuracy; | |
118 | int max_sampling_time; | |
119 | int min_sampling_time; | |
120 | int max_averaging_interval; | |
121 | int min_averaging_interval; | |
038fdea2 AS |
122 | int capacity_granularity_1; |
123 | int capacity_granularity_2; | |
f1d4661a | 124 | int alarm; |
038fdea2 AS |
125 | char model_number[32]; |
126 | char serial_number[32]; | |
127 | char type[32]; | |
128 | char oem_info[32]; | |
f1d4661a AS |
129 | int state; |
130 | int power_unit; | |
7b3bcc4a | 131 | unsigned long flags; |
1da177e4 LT |
132 | }; |
133 | ||
497888cf | 134 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
d7380965 | 135 | |
78490d82 | 136 | inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 137 | { |
78490d82 AS |
138 | return battery->device->status.battery_present; |
139 | } | |
038fdea2 | 140 | |
d7380965 AS |
141 | static int acpi_battery_technology(struct acpi_battery *battery) |
142 | { | |
143 | if (!strcasecmp("NiCd", battery->type)) | |
144 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
145 | if (!strcasecmp("NiMH", battery->type)) | |
146 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
147 | if (!strcasecmp("LION", battery->type)) | |
148 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 149 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 150 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
151 | if (!strcasecmp("LiP", battery->type)) |
152 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
153 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
154 | } | |
155 | ||
9104476e | 156 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 157 | |
56f382a0 RH |
158 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
159 | { | |
160 | /* either charging or discharging */ | |
161 | if (battery->state != 0) | |
162 | return 0; | |
163 | ||
164 | /* battery not reporting charge */ | |
165 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
166 | battery->capacity_now == 0) | |
167 | return 0; | |
168 | ||
169 | /* good batteries update full_charge as the batteries degrade */ | |
170 | if (battery->full_charge_capacity == battery->capacity_now) | |
171 | return 1; | |
172 | ||
173 | /* fallback to using design values for broken batteries */ | |
174 | if (battery->design_capacity == battery->capacity_now) | |
175 | return 1; | |
176 | ||
177 | /* we don't do any sort of metric based on percentages */ | |
178 | return 0; | |
179 | } | |
180 | ||
d7380965 AS |
181 | static int acpi_battery_get_property(struct power_supply *psy, |
182 | enum power_supply_property psp, | |
183 | union power_supply_propval *val) | |
184 | { | |
a1b4bd69 | 185 | int ret = 0; |
d7380965 AS |
186 | struct acpi_battery *battery = to_acpi_battery(psy); |
187 | ||
9104476e AS |
188 | if (acpi_battery_present(battery)) { |
189 | /* run battery update only if it is present */ | |
190 | acpi_battery_get_state(battery); | |
191 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
192 | return -ENODEV; |
193 | switch (psp) { | |
194 | case POWER_SUPPLY_PROP_STATUS: | |
195 | if (battery->state & 0x01) | |
196 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
197 | else if (battery->state & 0x02) | |
198 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
56f382a0 | 199 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 200 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
201 | else |
202 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
203 | break; |
204 | case POWER_SUPPLY_PROP_PRESENT: | |
205 | val->intval = acpi_battery_present(battery); | |
206 | break; | |
207 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
208 | val->intval = acpi_battery_technology(battery); | |
209 | break; | |
c67fcd67 AS |
210 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
211 | val->intval = battery->cycle_count; | |
212 | break; | |
d7380965 | 213 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
214 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
215 | ret = -ENODEV; | |
216 | else | |
217 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
218 | break; |
219 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
220 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
221 | ret = -ENODEV; | |
222 | else | |
223 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
224 | break; |
225 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 226 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
227 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
228 | ret = -ENODEV; | |
229 | else | |
230 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
231 | break; |
232 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
233 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
234 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
235 | ret = -ENODEV; | |
236 | else | |
237 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
238 | break; |
239 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
240 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
241 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
242 | ret = -ENODEV; | |
243 | else | |
244 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
245 | break; |
246 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
247 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
248 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
249 | ret = -ENODEV; | |
250 | else | |
251 | val->intval = battery->capacity_now * 1000; | |
d7380965 AS |
252 | break; |
253 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
254 | val->strval = battery->model_number; | |
255 | break; | |
256 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
257 | val->strval = battery->oem_info; | |
258 | break; | |
7c2670bb | 259 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
260 | val->strval = battery->serial_number; | |
261 | break; | |
d7380965 | 262 | default: |
a1b4bd69 | 263 | ret = -EINVAL; |
d7380965 | 264 | } |
a1b4bd69 | 265 | return ret; |
d7380965 AS |
266 | } |
267 | ||
268 | static enum power_supply_property charge_battery_props[] = { | |
269 | POWER_SUPPLY_PROP_STATUS, | |
270 | POWER_SUPPLY_PROP_PRESENT, | |
271 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 272 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
273 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
274 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
275 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
276 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
277 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
278 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
279 | POWER_SUPPLY_PROP_MODEL_NAME, | |
280 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 281 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
282 | }; |
283 | ||
284 | static enum power_supply_property energy_battery_props[] = { | |
285 | POWER_SUPPLY_PROP_STATUS, | |
286 | POWER_SUPPLY_PROP_PRESENT, | |
287 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 288 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
289 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
290 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 291 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
292 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
293 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
294 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
295 | POWER_SUPPLY_PROP_MODEL_NAME, | |
296 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 297 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
298 | }; |
299 | ||
fdcedbba | 300 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 301 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 302 | { |
ae6f6187 LT |
303 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? |
304 | "mA" : "mW"; | |
b6ce4083 | 305 | } |
d7380965 | 306 | #endif |
b6ce4083 | 307 | |
78490d82 AS |
308 | /* -------------------------------------------------------------------------- |
309 | Battery Management | |
310 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
311 | struct acpi_offsets { |
312 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
313 | u8 mode; /* int or string? */ | |
314 | }; | |
b6ce4083 | 315 | |
038fdea2 AS |
316 | static struct acpi_offsets state_offsets[] = { |
317 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 318 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
319 | {offsetof(struct acpi_battery, capacity_now), 0}, |
320 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 321 | }; |
b6ce4083 | 322 | |
038fdea2 AS |
323 | static struct acpi_offsets info_offsets[] = { |
324 | {offsetof(struct acpi_battery, power_unit), 0}, | |
325 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 326 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
327 | {offsetof(struct acpi_battery, technology), 0}, |
328 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
329 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
330 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
331 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
332 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
333 | {offsetof(struct acpi_battery, model_number), 1}, | |
334 | {offsetof(struct acpi_battery, serial_number), 1}, | |
335 | {offsetof(struct acpi_battery, type), 1}, | |
336 | {offsetof(struct acpi_battery, oem_info), 1}, | |
337 | }; | |
b6ce4083 | 338 | |
c67fcd67 AS |
339 | static struct acpi_offsets extended_info_offsets[] = { |
340 | {offsetof(struct acpi_battery, power_unit), 0}, | |
341 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
342 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
343 | {offsetof(struct acpi_battery, technology), 0}, | |
344 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
345 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
346 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
347 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
348 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
349 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
350 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
351 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
352 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
353 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
354 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
355 | {offsetof(struct acpi_battery, model_number), 1}, | |
356 | {offsetof(struct acpi_battery, serial_number), 1}, | |
357 | {offsetof(struct acpi_battery, type), 1}, | |
358 | {offsetof(struct acpi_battery, oem_info), 1}, | |
359 | }; | |
360 | ||
038fdea2 AS |
361 | static int extract_package(struct acpi_battery *battery, |
362 | union acpi_object *package, | |
363 | struct acpi_offsets *offsets, int num) | |
364 | { | |
106449e8 | 365 | int i; |
038fdea2 AS |
366 | union acpi_object *element; |
367 | if (package->type != ACPI_TYPE_PACKAGE) | |
368 | return -EFAULT; | |
369 | for (i = 0; i < num; ++i) { | |
370 | if (package->package.count <= i) | |
371 | return -EFAULT; | |
372 | element = &package->package.elements[i]; | |
373 | if (offsets[i].mode) { | |
106449e8 AS |
374 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
375 | if (element->type == ACPI_TYPE_STRING || | |
376 | element->type == ACPI_TYPE_BUFFER) | |
377 | strncpy(ptr, element->string.pointer, 32); | |
378 | else if (element->type == ACPI_TYPE_INTEGER) { | |
379 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
380 | sizeof(u64)); |
381 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
382 | } else |
383 | *ptr = 0; /* don't have value */ | |
038fdea2 | 384 | } else { |
b8a1bdb1 AS |
385 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
386 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
387 | element->integer.value : -1; | |
038fdea2 | 388 | } |
b6ce4083 | 389 | } |
b6ce4083 VL |
390 | return 0; |
391 | } | |
392 | ||
393 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
394 | { | |
aa650bbd | 395 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
396 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
397 | return -ENODEV; | |
398 | } | |
aa650bbd | 399 | return 0; |
b6ce4083 VL |
400 | } |
401 | ||
402 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 403 | { |
aa650bbd | 404 | int result = -EFAULT; |
4be44fcd | 405 | acpi_status status = 0; |
c67fcd67 AS |
406 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)? |
407 | "_BIX" : "_BIF"; | |
408 | ||
4be44fcd | 409 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 410 | |
b6ce4083 VL |
411 | if (!acpi_battery_present(battery)) |
412 | return 0; | |
038fdea2 | 413 | mutex_lock(&battery->lock); |
c67fcd67 AS |
414 | status = acpi_evaluate_object(battery->device->handle, name, |
415 | NULL, &buffer); | |
038fdea2 | 416 | mutex_unlock(&battery->lock); |
aa650bbd | 417 | |
1da177e4 | 418 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 419 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 420 | return -ENODEV; |
1da177e4 | 421 | } |
c67fcd67 AS |
422 | if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) |
423 | result = extract_package(battery, buffer.pointer, | |
424 | extended_info_offsets, | |
425 | ARRAY_SIZE(extended_info_offsets)); | |
426 | else | |
427 | result = extract_package(battery, buffer.pointer, | |
428 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 429 | kfree(buffer.pointer); |
557d5868 ZR |
430 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
431 | battery->full_charge_capacity = battery->design_capacity; | |
d550d98d | 432 | return result; |
1da177e4 LT |
433 | } |
434 | ||
b6ce4083 | 435 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 436 | { |
4be44fcd LB |
437 | int result = 0; |
438 | acpi_status status = 0; | |
439 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 440 | |
b6ce4083 VL |
441 | if (!acpi_battery_present(battery)) |
442 | return 0; | |
1da177e4 | 443 | |
f1d4661a AS |
444 | if (battery->update_time && |
445 | time_before(jiffies, battery->update_time + | |
446 | msecs_to_jiffies(cache_time))) | |
447 | return 0; | |
448 | ||
038fdea2 | 449 | mutex_lock(&battery->lock); |
f1d4661a | 450 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
451 | NULL, &buffer); |
452 | mutex_unlock(&battery->lock); | |
5b31d895 | 453 | |
1da177e4 | 454 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 455 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 456 | return -ENODEV; |
1da177e4 | 457 | } |
aa650bbd | 458 | |
038fdea2 AS |
459 | result = extract_package(battery, buffer.pointer, |
460 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 461 | battery->update_time = jiffies; |
78490d82 | 462 | kfree(buffer.pointer); |
bc76f90b | 463 | |
55003b21 LT |
464 | /* For buggy DSDTs that report negative 16-bit values for either |
465 | * charging or discharging current and/or report 0 as 65536 | |
466 | * due to bad math. | |
467 | */ | |
468 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
469 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
470 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 471 | battery->rate_now = abs((s16)battery->rate_now); |
55003b21 LT |
472 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
473 | " invalid.\n"); | |
474 | } | |
bc76f90b | 475 | |
557d5868 ZR |
476 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
477 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
478 | battery->capacity_now = (battery->capacity_now * | |
479 | battery->full_charge_capacity) / 100; | |
b6ce4083 VL |
480 | return result; |
481 | } | |
1da177e4 | 482 | |
aa650bbd | 483 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 484 | { |
4be44fcd | 485 | acpi_status status = 0; |
aa650bbd | 486 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 487 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 488 | |
c67fcd67 | 489 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 490 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 491 | return -ENODEV; |
1da177e4 | 492 | |
aa650bbd | 493 | arg0.integer.value = battery->alarm; |
1da177e4 | 494 | |
038fdea2 | 495 | mutex_lock(&battery->lock); |
f1d4661a AS |
496 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
497 | &arg_list, NULL); | |
038fdea2 | 498 | mutex_unlock(&battery->lock); |
aa650bbd | 499 | |
1da177e4 | 500 | if (ACPI_FAILURE(status)) |
d550d98d | 501 | return -ENODEV; |
1da177e4 | 502 | |
aa650bbd | 503 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 504 | return 0; |
1da177e4 LT |
505 | } |
506 | ||
b6ce4083 | 507 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 508 | { |
4be44fcd LB |
509 | acpi_status status = AE_OK; |
510 | acpi_handle handle = NULL; | |
4be44fcd | 511 | |
b6ce4083 | 512 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
513 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
514 | if (ACPI_FAILURE(status)) { | |
7b3bcc4a | 515 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 516 | return 0; |
b6ce4083 | 517 | } |
7b3bcc4a | 518 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
519 | if (!battery->alarm) |
520 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 521 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 522 | } |
1da177e4 | 523 | |
508df92d AB |
524 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
525 | struct device_attribute *attr, | |
526 | char *buf) | |
527 | { | |
528 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
529 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
530 | } | |
531 | ||
532 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
533 | struct device_attribute *attr, | |
534 | const char *buf, size_t count) | |
535 | { | |
536 | unsigned long x; | |
537 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
538 | if (sscanf(buf, "%ld\n", &x) == 1) | |
539 | battery->alarm = x/1000; | |
540 | if (acpi_battery_present(battery)) | |
541 | acpi_battery_set_alarm(battery); | |
542 | return count; | |
543 | } | |
544 | ||
545 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 546 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
547 | .show = acpi_battery_alarm_show, |
548 | .store = acpi_battery_alarm_store, | |
549 | }; | |
550 | ||
551 | static int sysfs_add_battery(struct acpi_battery *battery) | |
552 | { | |
553 | int result; | |
554 | ||
ae6f6187 | 555 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
508df92d AB |
556 | battery->bat.properties = charge_battery_props; |
557 | battery->bat.num_properties = | |
558 | ARRAY_SIZE(charge_battery_props); | |
559 | } else { | |
560 | battery->bat.properties = energy_battery_props; | |
561 | battery->bat.num_properties = | |
562 | ARRAY_SIZE(energy_battery_props); | |
563 | } | |
564 | ||
565 | battery->bat.name = acpi_device_bid(battery->device); | |
566 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
567 | battery->bat.get_property = acpi_battery_get_property; | |
568 | ||
569 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
570 | if (result) | |
571 | return result; | |
572 | return device_create_file(battery->bat.dev, &alarm_attr); | |
573 | } | |
574 | ||
575 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
576 | { | |
69d94ec6 | 577 | mutex_lock(&battery->sysfs_lock); |
9c921c22 | 578 | if (!battery->bat.dev) { |
69d94ec6 | 579 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 580 | return; |
9c921c22 LT |
581 | } |
582 | ||
508df92d AB |
583 | device_remove_file(battery->bat.dev, &alarm_attr); |
584 | power_supply_unregister(&battery->bat); | |
9104476e | 585 | battery->bat.dev = NULL; |
69d94ec6 | 586 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
587 | } |
588 | ||
557d5868 ZR |
589 | /* |
590 | * According to the ACPI spec, some kinds of primary batteries can | |
591 | * report percentage battery remaining capacity directly to OS. | |
592 | * In this case, it reports the Last Full Charged Capacity == 100 | |
593 | * and BatteryPresentRate == 0xFFFFFFFF. | |
594 | * | |
595 | * Now we found some battery reports percentage remaining capacity | |
596 | * even if it's rechargeable. | |
597 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
598 | * | |
599 | * Handle this correctly so that they won't break userspace. | |
600 | */ | |
7b78622d | 601 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
602 | { |
603 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
604 | return ; | |
605 | ||
606 | if (battery->full_charge_capacity == 100 && | |
607 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
608 | battery->capacity_now >=0 && battery->capacity_now <= 100) { | |
609 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); | |
610 | battery->full_charge_capacity = battery->design_capacity; | |
611 | battery->capacity_now = (battery->capacity_now * | |
612 | battery->full_charge_capacity) / 100; | |
613 | } | |
614 | } | |
615 | ||
f1d4661a | 616 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 617 | { |
50b17851 | 618 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 619 | result = acpi_battery_get_status(battery); |
508df92d | 620 | if (result) |
b6ce4083 | 621 | return result; |
508df92d AB |
622 | if (!acpi_battery_present(battery)) { |
623 | sysfs_remove_battery(battery); | |
97749cd9 | 624 | battery->update_time = 0; |
508df92d | 625 | return 0; |
b6ce4083 | 626 | } |
50b17851 AS |
627 | if (!battery->update_time || |
628 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
629 | result = acpi_battery_get_info(battery); |
630 | if (result) | |
631 | return result; | |
632 | acpi_battery_init_alarm(battery); | |
633 | } | |
eb03cb02 SH |
634 | if (!battery->bat.dev) { |
635 | result = sysfs_add_battery(battery); | |
636 | if (result) | |
637 | return result; | |
638 | } | |
557d5868 | 639 | result = acpi_battery_get_state(battery); |
7b78622d | 640 | acpi_battery_quirks(battery); |
557d5868 | 641 | return result; |
4bd35cdb VL |
642 | } |
643 | ||
da8aeb92 RW |
644 | static void acpi_battery_refresh(struct acpi_battery *battery) |
645 | { | |
646 | if (!battery->bat.dev) | |
647 | return; | |
648 | ||
649 | acpi_battery_get_info(battery); | |
650 | /* The battery may have changed its reporting units. */ | |
651 | sysfs_remove_battery(battery); | |
652 | sysfs_add_battery(battery); | |
653 | } | |
654 | ||
1da177e4 LT |
655 | /* -------------------------------------------------------------------------- |
656 | FS Interface (/proc) | |
657 | -------------------------------------------------------------------------- */ | |
658 | ||
fdcedbba | 659 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 660 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 661 | |
78490d82 | 662 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 663 | { |
50dd0969 | 664 | struct acpi_battery *battery = seq->private; |
1da177e4 | 665 | |
b6ce4083 | 666 | if (result) |
1da177e4 LT |
667 | goto end; |
668 | ||
aa650bbd AS |
669 | seq_printf(seq, "present: %s\n", |
670 | acpi_battery_present(battery)?"yes":"no"); | |
671 | if (!acpi_battery_present(battery)) | |
1da177e4 | 672 | goto end; |
038fdea2 | 673 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
674 | seq_printf(seq, "design capacity: unknown\n"); |
675 | else | |
676 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
677 | battery->design_capacity, |
678 | acpi_battery_units(battery)); | |
1da177e4 | 679 | |
d7380965 | 680 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
681 | seq_printf(seq, "last full capacity: unknown\n"); |
682 | else | |
683 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 684 | battery->full_charge_capacity, |
aa650bbd AS |
685 | acpi_battery_units(battery)); |
686 | ||
687 | seq_printf(seq, "battery technology: %srechargeable\n", | |
688 | (!battery->technology)?"non-":""); | |
1da177e4 | 689 | |
038fdea2 | 690 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
691 | seq_printf(seq, "design voltage: unknown\n"); |
692 | else | |
693 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 694 | battery->design_voltage); |
1da177e4 | 695 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
696 | battery->design_capacity_warning, |
697 | acpi_battery_units(battery)); | |
1da177e4 | 698 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
699 | battery->design_capacity_low, |
700 | acpi_battery_units(battery)); | |
c67fcd67 | 701 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); |
1da177e4 | 702 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
703 | battery->capacity_granularity_1, |
704 | acpi_battery_units(battery)); | |
1da177e4 | 705 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
706 | battery->capacity_granularity_2, |
707 | acpi_battery_units(battery)); | |
038fdea2 AS |
708 | seq_printf(seq, "model number: %s\n", battery->model_number); |
709 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
710 | seq_printf(seq, "battery type: %s\n", battery->type); | |
711 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 712 | end: |
b6ce4083 VL |
713 | if (result) |
714 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
715 | return result; |
716 | } | |
717 | ||
78490d82 | 718 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 719 | { |
50dd0969 | 720 | struct acpi_battery *battery = seq->private; |
1da177e4 | 721 | |
b6ce4083 | 722 | if (result) |
1da177e4 LT |
723 | goto end; |
724 | ||
aa650bbd AS |
725 | seq_printf(seq, "present: %s\n", |
726 | acpi_battery_present(battery)?"yes":"no"); | |
727 | if (!acpi_battery_present(battery)) | |
1da177e4 | 728 | goto end; |
b6ce4083 | 729 | |
aa650bbd AS |
730 | seq_printf(seq, "capacity state: %s\n", |
731 | (battery->state & 0x04)?"critical":"ok"); | |
732 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
733 | seq_printf(seq, |
734 | "charging state: charging/discharging\n"); | |
aa650bbd | 735 | else if (battery->state & 0x01) |
1da177e4 | 736 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 737 | else if (battery->state & 0x02) |
1da177e4 | 738 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 739 | else |
1da177e4 | 740 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 741 | |
7faa144a | 742 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
743 | seq_printf(seq, "present rate: unknown\n"); |
744 | else | |
745 | seq_printf(seq, "present rate: %d %s\n", | |
7faa144a | 746 | battery->rate_now, acpi_battery_units(battery)); |
1da177e4 | 747 | |
d7380965 | 748 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
749 | seq_printf(seq, "remaining capacity: unknown\n"); |
750 | else | |
751 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
752 | battery->capacity_now, acpi_battery_units(battery)); |
753 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
754 | seq_printf(seq, "present voltage: unknown\n"); |
755 | else | |
756 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 757 | battery->voltage_now); |
4be44fcd | 758 | end: |
aa650bbd | 759 | if (result) |
b6ce4083 | 760 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
761 | |
762 | return result; | |
763 | } | |
764 | ||
78490d82 | 765 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 766 | { |
50dd0969 | 767 | struct acpi_battery *battery = seq->private; |
1da177e4 | 768 | |
b6ce4083 | 769 | if (result) |
1da177e4 LT |
770 | goto end; |
771 | ||
b6ce4083 | 772 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
773 | seq_printf(seq, "present: no\n"); |
774 | goto end; | |
775 | } | |
1da177e4 LT |
776 | seq_printf(seq, "alarm: "); |
777 | if (!battery->alarm) | |
778 | seq_printf(seq, "unsupported\n"); | |
779 | else | |
aa650bbd AS |
780 | seq_printf(seq, "%u %sh\n", battery->alarm, |
781 | acpi_battery_units(battery)); | |
4be44fcd | 782 | end: |
b6ce4083 VL |
783 | if (result) |
784 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
785 | return result; |
786 | } | |
787 | ||
f1d4661a AS |
788 | static ssize_t acpi_battery_write_alarm(struct file *file, |
789 | const char __user * buffer, | |
790 | size_t count, loff_t * ppos) | |
1da177e4 | 791 | { |
4be44fcd LB |
792 | int result = 0; |
793 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
794 | struct seq_file *m = file->private_data; |
795 | struct acpi_battery *battery = m->private; | |
1da177e4 | 796 | |
1da177e4 | 797 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 798 | return -EINVAL; |
b6ce4083 VL |
799 | if (!acpi_battery_present(battery)) { |
800 | result = -ENODEV; | |
801 | goto end; | |
802 | } | |
b6ce4083 VL |
803 | if (copy_from_user(alarm_string, buffer, count)) { |
804 | result = -EFAULT; | |
805 | goto end; | |
806 | } | |
1da177e4 | 807 | alarm_string[count] = '\0'; |
f1d4661a | 808 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 809 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 810 | end: |
b6ce4083 | 811 | if (!result) |
f1d4661a | 812 | return count; |
78490d82 AS |
813 | return result; |
814 | } | |
815 | ||
816 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
817 | |
818 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
819 | acpi_battery_print_info, | |
820 | acpi_battery_print_state, | |
821 | acpi_battery_print_alarm, | |
78490d82 | 822 | }; |
b6ce4083 | 823 | |
78490d82 AS |
824 | static int acpi_battery_read(int fid, struct seq_file *seq) |
825 | { | |
826 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 827 | int result = acpi_battery_update(battery); |
aa650bbd | 828 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
829 | } |
830 | ||
aa650bbd AS |
831 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
832 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
833 | { \ | |
834 | return acpi_battery_read(_name##_tag, seq); \ | |
835 | } \ | |
836 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
837 | { \ | |
838 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
839 | } |
840 | ||
aa650bbd AS |
841 | DECLARE_FILE_FUNCTIONS(info); |
842 | DECLARE_FILE_FUNCTIONS(state); | |
843 | DECLARE_FILE_FUNCTIONS(alarm); | |
844 | ||
845 | #undef DECLARE_FILE_FUNCTIONS | |
846 | ||
847 | #define FILE_DESCRIPTION_RO(_name) \ | |
848 | { \ | |
849 | .name = __stringify(_name), \ | |
850 | .mode = S_IRUGO, \ | |
851 | .ops = { \ | |
852 | .open = acpi_battery_##_name##_open_fs, \ | |
853 | .read = seq_read, \ | |
854 | .llseek = seq_lseek, \ | |
855 | .release = single_release, \ | |
856 | .owner = THIS_MODULE, \ | |
857 | }, \ | |
858 | } | |
78490d82 | 859 | |
aa650bbd AS |
860 | #define FILE_DESCRIPTION_RW(_name) \ |
861 | { \ | |
862 | .name = __stringify(_name), \ | |
863 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
864 | .ops = { \ | |
865 | .open = acpi_battery_##_name##_open_fs, \ | |
866 | .read = seq_read, \ | |
867 | .llseek = seq_lseek, \ | |
868 | .write = acpi_battery_write_##_name, \ | |
869 | .release = single_release, \ | |
870 | .owner = THIS_MODULE, \ | |
871 | }, \ | |
872 | } | |
1da177e4 | 873 | |
9c8b04be | 874 | static const struct battery_file { |
78490d82 | 875 | struct file_operations ops; |
d161a13f | 876 | umode_t mode; |
070d8eb1 | 877 | const char *name; |
78490d82 | 878 | } acpi_battery_file[] = { |
aa650bbd AS |
879 | FILE_DESCRIPTION_RO(info), |
880 | FILE_DESCRIPTION_RO(state), | |
881 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
882 | }; |
883 | ||
aa650bbd AS |
884 | #undef FILE_DESCRIPTION_RO |
885 | #undef FILE_DESCRIPTION_RW | |
886 | ||
4be44fcd | 887 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 888 | { |
4be44fcd | 889 | struct proc_dir_entry *entry = NULL; |
78490d82 | 890 | int i; |
1da177e4 | 891 | |
6d855fcd ZR |
892 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," |
893 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
1da177e4 LT |
894 | if (!acpi_device_dir(device)) { |
895 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 896 | acpi_battery_dir); |
1da177e4 | 897 | if (!acpi_device_dir(device)) |
d550d98d | 898 | return -ENODEV; |
1da177e4 LT |
899 | } |
900 | ||
78490d82 | 901 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
cf7acfab DL |
902 | entry = proc_create_data(acpi_battery_file[i].name, |
903 | acpi_battery_file[i].mode, | |
904 | acpi_device_dir(device), | |
905 | &acpi_battery_file[i].ops, | |
906 | acpi_driver_data(device)); | |
78490d82 AS |
907 | if (!entry) |
908 | return -ENODEV; | |
1da177e4 | 909 | } |
d550d98d | 910 | return 0; |
1da177e4 LT |
911 | } |
912 | ||
aa650bbd | 913 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 914 | { |
78490d82 | 915 | int i; |
aa650bbd AS |
916 | if (!acpi_device_dir(device)) |
917 | return; | |
918 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
919 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 920 | acpi_device_dir(device)); |
1da177e4 | 921 | |
aa650bbd AS |
922 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
923 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
924 | } |
925 | ||
d7380965 | 926 | #endif |
3e58ea0d | 927 | |
1da177e4 LT |
928 | /* -------------------------------------------------------------------------- |
929 | Driver Interface | |
930 | -------------------------------------------------------------------------- */ | |
931 | ||
d9406691 | 932 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 933 | { |
d9406691 | 934 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 935 | struct device *old; |
d9406691 | 936 | |
1da177e4 | 937 | if (!battery) |
d550d98d | 938 | return; |
153e500f | 939 | old = battery->bat.dev; |
da8aeb92 RW |
940 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
941 | acpi_battery_refresh(battery); | |
f1d4661a AS |
942 | acpi_battery_update(battery); |
943 | acpi_bus_generate_proc_event(device, event, | |
944 | acpi_battery_present(battery)); | |
945 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
0794469d | 946 | dev_name(&device->dev), event, |
9ea7d575 | 947 | acpi_battery_present(battery)); |
2345baf4 | 948 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 949 | if (old && battery->bat.dev) |
f79e1cec | 950 | power_supply_changed(&battery->bat); |
1da177e4 LT |
951 | } |
952 | ||
25be5821 KM |
953 | static int battery_notify(struct notifier_block *nb, |
954 | unsigned long mode, void *_unused) | |
955 | { | |
956 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
957 | pm_nb); | |
958 | switch (mode) { | |
d5a5911b | 959 | case PM_POST_HIBERNATION: |
25be5821 | 960 | case PM_POST_SUSPEND: |
6e17fb6a LT |
961 | if (battery->bat.dev) { |
962 | sysfs_remove_battery(battery); | |
963 | sysfs_add_battery(battery); | |
964 | } | |
25be5821 KM |
965 | break; |
966 | } | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
4be44fcd | 971 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 972 | { |
4be44fcd | 973 | int result = 0; |
4be44fcd | 974 | struct acpi_battery *battery = NULL; |
c67fcd67 | 975 | acpi_handle handle; |
1da177e4 | 976 | if (!device) |
d550d98d | 977 | return -EINVAL; |
36bcbec7 | 978 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 979 | if (!battery) |
d550d98d | 980 | return -ENOMEM; |
145def84 | 981 | battery->device = device; |
1da177e4 LT |
982 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
983 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 984 | device->driver_data = battery; |
038fdea2 | 985 | mutex_init(&battery->lock); |
69d94ec6 | 986 | mutex_init(&battery->sysfs_lock); |
c67fcd67 AS |
987 | if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle, |
988 | "_BIX", &handle))) | |
989 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); | |
eb03cb02 SH |
990 | result = acpi_battery_update(battery); |
991 | if (result) | |
992 | goto fail; | |
fdcedbba | 993 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 994 | result = acpi_battery_add_fs(device); |
d7380965 | 995 | #endif |
e80bba4b | 996 | if (result) { |
fdcedbba | 997 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 998 | acpi_battery_remove_fs(device); |
d7380965 | 999 | #endif |
e80bba4b | 1000 | goto fail; |
1da177e4 | 1001 | } |
25be5821 | 1002 | |
e80bba4b SH |
1003 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1004 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
1005 | device->status.battery_present ? "present" : "absent"); | |
1006 | ||
25be5821 KM |
1007 | battery->pm_nb.notifier_call = battery_notify; |
1008 | register_pm_notifier(&battery->pm_nb); | |
1009 | ||
d550d98d | 1010 | return result; |
e80bba4b SH |
1011 | |
1012 | fail: | |
1013 | sysfs_remove_battery(battery); | |
1014 | mutex_destroy(&battery->lock); | |
69d94ec6 | 1015 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
1016 | kfree(battery); |
1017 | return result; | |
1da177e4 LT |
1018 | } |
1019 | ||
4be44fcd | 1020 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 1021 | { |
4be44fcd | 1022 | struct acpi_battery *battery = NULL; |
1da177e4 | 1023 | |
1da177e4 | 1024 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1025 | return -EINVAL; |
50dd0969 | 1026 | battery = acpi_driver_data(device); |
25be5821 | 1027 | unregister_pm_notifier(&battery->pm_nb); |
fdcedbba | 1028 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 1029 | acpi_battery_remove_fs(device); |
d7380965 | 1030 | #endif |
508df92d | 1031 | sysfs_remove_battery(battery); |
038fdea2 | 1032 | mutex_destroy(&battery->lock); |
69d94ec6 | 1033 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 1034 | kfree(battery); |
d550d98d | 1035 | return 0; |
1da177e4 LT |
1036 | } |
1037 | ||
34c4415a | 1038 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 1039 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
1040 | { |
1041 | struct acpi_battery *battery; | |
34c4415a JK |
1042 | if (!device) |
1043 | return -EINVAL; | |
f1d4661a AS |
1044 | battery = acpi_driver_data(device); |
1045 | battery->update_time = 0; | |
508df92d | 1046 | acpi_battery_update(battery); |
b6ce4083 | 1047 | return 0; |
34c4415a JK |
1048 | } |
1049 | ||
aa650bbd AS |
1050 | static struct acpi_driver acpi_battery_driver = { |
1051 | .name = "battery", | |
1052 | .class = ACPI_BATTERY_CLASS, | |
1053 | .ids = battery_device_ids, | |
d9406691 | 1054 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1055 | .ops = { |
1056 | .add = acpi_battery_add, | |
1057 | .resume = acpi_battery_resume, | |
1058 | .remove = acpi_battery_remove, | |
d9406691 | 1059 | .notify = acpi_battery_notify, |
aa650bbd AS |
1060 | }, |
1061 | }; | |
1062 | ||
b0cbc861 | 1063 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1064 | { |
4d8316d5 | 1065 | if (acpi_disabled) |
0f66af53 | 1066 | return; |
fdcedbba | 1067 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1068 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 1069 | if (!acpi_battery_dir) |
0f66af53 | 1070 | return; |
d7380965 | 1071 | #endif |
aa650bbd | 1072 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 1073 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1074 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 1075 | #endif |
0f66af53 | 1076 | return; |
1da177e4 | 1077 | } |
0f66af53 AV |
1078 | return; |
1079 | } | |
1080 | ||
1081 | static int __init acpi_battery_init(void) | |
1082 | { | |
1083 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 1084 | return 0; |
1da177e4 LT |
1085 | } |
1086 | ||
4be44fcd | 1087 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1088 | { |
1da177e4 | 1089 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 1090 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1091 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 1092 | #endif |
1da177e4 LT |
1093 | } |
1094 | ||
1da177e4 LT |
1095 | module_init(acpi_battery_init); |
1096 | module_exit(acpi_battery_exit); |