Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * acpi_battery.c - ACPI Battery Driver ($Revision: 37 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/seq_file.h> | |
32 | #include <asm/uaccess.h> | |
33 | ||
34 | #include <acpi/acpi_bus.h> | |
35 | #include <acpi/acpi_drivers.h> | |
36 | ||
1da177e4 LT |
37 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
38 | ||
39 | #define ACPI_BATTERY_FORMAT_BIF "NNNNNNNNNSSSS" | |
40 | #define ACPI_BATTERY_FORMAT_BST "NNNN" | |
41 | ||
42 | #define ACPI_BATTERY_COMPONENT 0x00040000 | |
43 | #define ACPI_BATTERY_CLASS "battery" | |
44 | #define ACPI_BATTERY_HID "PNP0C0A" | |
1da177e4 LT |
45 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
46 | #define ACPI_BATTERY_FILE_INFO "info" | |
a1f0eff2 | 47 | #define ACPI_BATTERY_FILE_STATE "state" |
1da177e4 LT |
48 | #define ACPI_BATTERY_FILE_ALARM "alarm" |
49 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 | |
50 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
51 | #define ACPI_BATTERY_UNITS_WATTS "mW" | |
52 | #define ACPI_BATTERY_UNITS_AMPS "mA" | |
53 | ||
1da177e4 | 54 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 VL |
55 | |
56 | #define ACPI_BATTERY_UPDATE_TIME 0 | |
57 | ||
58 | #define ACPI_BATTERY_NONE_UPDATE 0 | |
59 | #define ACPI_BATTERY_EASY_UPDATE 1 | |
60 | #define ACPI_BATTERY_INIT_UPDATE 2 | |
61 | ||
f52fd66d | 62 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 63 | |
f52fd66d | 64 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 65 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
66 | MODULE_LICENSE("GPL"); |
67 | ||
b6ce4083 VL |
68 | static unsigned int update_time = ACPI_BATTERY_UPDATE_TIME; |
69 | ||
70 | /* 0 - every time, > 0 - by update_time */ | |
71 | module_param(update_time, uint, 0644); | |
72 | ||
3f86b832 RT |
73 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
74 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
75 | ||
4be44fcd LB |
76 | static int acpi_battery_add(struct acpi_device *device); |
77 | static int acpi_battery_remove(struct acpi_device *device, int type); | |
5d9464a4 | 78 | static int acpi_battery_resume(struct acpi_device *device); |
1da177e4 LT |
79 | |
80 | static struct acpi_driver acpi_battery_driver = { | |
c2b6705b | 81 | .name = "battery", |
4be44fcd LB |
82 | .class = ACPI_BATTERY_CLASS, |
83 | .ids = ACPI_BATTERY_HID, | |
84 | .ops = { | |
85 | .add = acpi_battery_add, | |
34c4415a | 86 | .resume = acpi_battery_resume, |
4be44fcd LB |
87 | .remove = acpi_battery_remove, |
88 | }, | |
1da177e4 LT |
89 | }; |
90 | ||
a1f0eff2 | 91 | struct acpi_battery_state { |
4be44fcd LB |
92 | acpi_integer state; |
93 | acpi_integer present_rate; | |
94 | acpi_integer remaining_capacity; | |
95 | acpi_integer present_voltage; | |
1da177e4 LT |
96 | }; |
97 | ||
98 | struct acpi_battery_info { | |
4be44fcd LB |
99 | acpi_integer power_unit; |
100 | acpi_integer design_capacity; | |
101 | acpi_integer last_full_capacity; | |
102 | acpi_integer battery_technology; | |
103 | acpi_integer design_voltage; | |
104 | acpi_integer design_capacity_warning; | |
105 | acpi_integer design_capacity_low; | |
106 | acpi_integer battery_capacity_granularity_1; | |
107 | acpi_integer battery_capacity_granularity_2; | |
108 | acpi_string model_number; | |
109 | acpi_string serial_number; | |
110 | acpi_string battery_type; | |
111 | acpi_string oem_info; | |
1da177e4 LT |
112 | }; |
113 | ||
114 | struct acpi_battery_flags { | |
b6ce4083 VL |
115 | u8 battery_present_prev; |
116 | u8 alarm_present; | |
117 | u8 init_update; | |
118 | u8 info_update; | |
119 | u8 state_update; | |
120 | u8 alarm_update; | |
121 | u8 power_unit; | |
1da177e4 LT |
122 | }; |
123 | ||
124 | struct acpi_battery { | |
b6ce4083 | 125 | struct mutex mutex; |
9ea7d575 | 126 | struct acpi_device *device; |
1da177e4 | 127 | struct acpi_battery_flags flags; |
b6ce4083 VL |
128 | struct acpi_buffer bif_data; |
129 | struct acpi_buffer bst_data; | |
4be44fcd | 130 | unsigned long alarm; |
b6ce4083 VL |
131 | unsigned long info_update_time; |
132 | unsigned long state_update_time; | |
133 | unsigned long alarm_update_time; | |
1da177e4 LT |
134 | }; |
135 | ||
b6ce4083 VL |
136 | #define acpi_battery_present(battery) battery->device->status.battery_present |
137 | #define acpi_battery_present_prev(battery) battery->flags.battery_present_prev | |
138 | #define acpi_battery_alarm_present(battery) battery->flags.alarm_present | |
139 | #define acpi_battery_init_update_flag(battery) battery->flags.init_update | |
140 | #define acpi_battery_info_update_flag(battery) battery->flags.info_update | |
141 | #define acpi_battery_state_update_flag(battery) battery->flags.state_update | |
142 | #define acpi_battery_alarm_update_flag(battery) battery->flags.alarm_update | |
143 | #define acpi_battery_power_units(battery) battery->flags.power_unit ? \ | |
144 | ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS | |
145 | #define acpi_battery_handle(battery) battery->device->handle | |
146 | #define acpi_battery_inserted(battery) (!acpi_battery_present_prev(battery) & acpi_battery_present(battery)) | |
147 | #define acpi_battery_removed(battery) (acpi_battery_present_prev(battery) & !acpi_battery_present(battery)) | |
148 | #define acpi_battery_bid(battery) acpi_device_bid(battery->device) | |
149 | #define acpi_battery_status_str(battery) acpi_battery_present(battery) ? "present" : "absent" | |
150 | ||
1da177e4 LT |
151 | /* -------------------------------------------------------------------------- |
152 | Battery Management | |
153 | -------------------------------------------------------------------------- */ | |
154 | ||
b6ce4083 VL |
155 | static void acpi_battery_mutex_lock(struct acpi_battery *battery) |
156 | { | |
157 | mutex_lock(&battery->mutex); | |
158 | } | |
159 | ||
160 | static void acpi_battery_mutex_unlock(struct acpi_battery *battery) | |
161 | { | |
162 | mutex_unlock(&battery->mutex); | |
163 | } | |
164 | ||
165 | static void acpi_battery_check_result(struct acpi_battery *battery, int result) | |
166 | { | |
167 | if (!battery) | |
168 | return; | |
169 | ||
170 | if (result) { | |
171 | acpi_battery_init_update_flag(battery) = 1; | |
172 | } | |
173 | } | |
174 | ||
175 | static int acpi_battery_extract_package(struct acpi_battery *battery, | |
176 | union acpi_object *package, | |
177 | struct acpi_buffer *format, | |
178 | struct acpi_buffer *data, | |
179 | char *package_name) | |
180 | { | |
181 | acpi_status status = AE_OK; | |
182 | struct acpi_buffer data_null = { 0, NULL }; | |
183 | ||
184 | status = acpi_extract_package(package, format, &data_null); | |
185 | if (status != AE_BUFFER_OVERFLOW) { | |
186 | ACPI_EXCEPTION((AE_INFO, status, "Extracting size %s", | |
187 | package_name)); | |
188 | return -ENODEV; | |
189 | } | |
190 | ||
191 | if (data_null.length != data->length) { | |
192 | if (data->pointer) { | |
193 | kfree(data->pointer); | |
194 | } | |
195 | data->pointer = kzalloc(data_null.length, GFP_KERNEL); | |
196 | if (!data->pointer) { | |
197 | ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, "kzalloc()")); | |
198 | return -ENOMEM; | |
199 | } | |
200 | data->length = data_null.length; | |
201 | } | |
202 | ||
203 | status = acpi_extract_package(package, format, data); | |
204 | if (ACPI_FAILURE(status)) { | |
205 | ACPI_EXCEPTION((AE_INFO, status, "Extracting %s", | |
206 | package_name)); | |
207 | return -ENODEV; | |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
214 | { | |
215 | int result = 0; | |
216 | ||
217 | result = acpi_bus_get_status(battery->device); | |
218 | if (result) { | |
219 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); | |
220 | return -ENODEV; | |
221 | } | |
222 | return result; | |
223 | } | |
224 | ||
225 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 226 | { |
4be44fcd LB |
227 | int result = 0; |
228 | acpi_status status = 0; | |
229 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
230 | struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BIF), | |
231 | ACPI_BATTERY_FORMAT_BIF | |
232 | }; | |
4be44fcd | 233 | union acpi_object *package = NULL; |
b6ce4083 VL |
234 | struct acpi_buffer *data = NULL; |
235 | struct acpi_battery_info *bif = NULL; | |
1da177e4 | 236 | |
b6ce4083 | 237 | battery->info_update_time = get_seconds(); |
1da177e4 | 238 | |
b6ce4083 VL |
239 | if (!acpi_battery_present(battery)) |
240 | return 0; | |
1da177e4 LT |
241 | |
242 | /* Evalute _BIF */ | |
243 | ||
9ea7d575 VL |
244 | status = |
245 | acpi_evaluate_object(acpi_battery_handle(battery), "_BIF", NULL, | |
246 | &buffer); | |
1da177e4 | 247 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 248 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 249 | return -ENODEV; |
1da177e4 LT |
250 | } |
251 | ||
50dd0969 | 252 | package = buffer.pointer; |
1da177e4 | 253 | |
b6ce4083 VL |
254 | data = &battery->bif_data; |
255 | ||
1da177e4 LT |
256 | /* Extract Package Data */ |
257 | ||
9ea7d575 VL |
258 | result = |
259 | acpi_battery_extract_package(battery, package, &format, data, | |
260 | "_BIF"); | |
b6ce4083 | 261 | if (result) |
1da177e4 | 262 | goto end; |
1da177e4 | 263 | |
b6ce4083 | 264 | end: |
1da177e4 | 265 | |
b6ce4083 VL |
266 | if (buffer.pointer) { |
267 | kfree(buffer.pointer); | |
1da177e4 LT |
268 | } |
269 | ||
b6ce4083 VL |
270 | if (!result) { |
271 | bif = data->pointer; | |
272 | battery->flags.power_unit = bif->power_unit; | |
273 | } | |
1da177e4 | 274 | |
d550d98d | 275 | return result; |
1da177e4 LT |
276 | } |
277 | ||
b6ce4083 | 278 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 279 | { |
4be44fcd LB |
280 | int result = 0; |
281 | acpi_status status = 0; | |
282 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
283 | struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BST), | |
284 | ACPI_BATTERY_FORMAT_BST | |
285 | }; | |
4be44fcd | 286 | union acpi_object *package = NULL; |
b6ce4083 | 287 | struct acpi_buffer *data = NULL; |
1da177e4 | 288 | |
b6ce4083 | 289 | battery->state_update_time = get_seconds(); |
1da177e4 | 290 | |
b6ce4083 VL |
291 | if (!acpi_battery_present(battery)) |
292 | return 0; | |
1da177e4 LT |
293 | |
294 | /* Evalute _BST */ | |
295 | ||
9ea7d575 VL |
296 | status = |
297 | acpi_evaluate_object(acpi_battery_handle(battery), "_BST", NULL, | |
298 | &buffer); | |
1da177e4 | 299 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 300 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 301 | return -ENODEV; |
1da177e4 LT |
302 | } |
303 | ||
50dd0969 | 304 | package = buffer.pointer; |
1da177e4 | 305 | |
b6ce4083 | 306 | data = &battery->bst_data; |
1da177e4 | 307 | |
b6ce4083 | 308 | /* Extract Package Data */ |
1da177e4 | 309 | |
9ea7d575 VL |
310 | result = |
311 | acpi_battery_extract_package(battery, package, &format, data, | |
312 | "_BST"); | |
b6ce4083 | 313 | if (result) |
1da177e4 | 314 | goto end; |
1da177e4 | 315 | |
b6ce4083 VL |
316 | end: |
317 | if (buffer.pointer) { | |
318 | kfree(buffer.pointer); | |
1da177e4 LT |
319 | } |
320 | ||
b6ce4083 VL |
321 | return result; |
322 | } | |
1da177e4 | 323 | |
b6ce4083 VL |
324 | static int acpi_battery_get_alarm(struct acpi_battery *battery) |
325 | { | |
326 | battery->alarm_update_time = get_seconds(); | |
1da177e4 | 327 | |
b6ce4083 | 328 | return 0; |
1da177e4 LT |
329 | } |
330 | ||
9ea7d575 VL |
331 | static int acpi_battery_set_alarm(struct acpi_battery *battery, |
332 | unsigned long alarm) | |
1da177e4 | 333 | { |
4be44fcd LB |
334 | acpi_status status = 0; |
335 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
336 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
1da177e4 | 337 | |
b6ce4083 | 338 | battery->alarm_update_time = get_seconds(); |
1da177e4 | 339 | |
b6ce4083 VL |
340 | if (!acpi_battery_present(battery)) |
341 | return -ENODEV; | |
1da177e4 | 342 | |
b6ce4083 | 343 | if (!acpi_battery_alarm_present(battery)) |
d550d98d | 344 | return -ENODEV; |
1da177e4 LT |
345 | |
346 | arg0.integer.value = alarm; | |
347 | ||
9ea7d575 VL |
348 | status = |
349 | acpi_evaluate_object(acpi_battery_handle(battery), "_BTP", | |
350 | &arg_list, NULL); | |
1da177e4 | 351 | if (ACPI_FAILURE(status)) |
d550d98d | 352 | return -ENODEV; |
1da177e4 LT |
353 | |
354 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", (u32) alarm)); | |
355 | ||
356 | battery->alarm = alarm; | |
357 | ||
d550d98d | 358 | return 0; |
1da177e4 LT |
359 | } |
360 | ||
b6ce4083 | 361 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 362 | { |
4be44fcd LB |
363 | int result = 0; |
364 | acpi_status status = AE_OK; | |
365 | acpi_handle handle = NULL; | |
b6ce4083 VL |
366 | struct acpi_battery_info *bif = battery->bif_data.pointer; |
367 | unsigned long alarm = battery->alarm; | |
4be44fcd | 368 | |
b6ce4083 | 369 | /* See if alarms are supported, and if so, set default */ |
1da177e4 | 370 | |
b6ce4083 VL |
371 | status = acpi_get_handle(acpi_battery_handle(battery), "_BTP", &handle); |
372 | if (ACPI_SUCCESS(status)) { | |
373 | acpi_battery_alarm_present(battery) = 1; | |
374 | if (!alarm && bif) { | |
375 | alarm = bif->design_capacity_warning; | |
376 | } | |
377 | result = acpi_battery_set_alarm(battery, alarm); | |
378 | if (result) | |
379 | goto end; | |
380 | } else { | |
381 | acpi_battery_alarm_present(battery) = 0; | |
382 | } | |
1da177e4 | 383 | |
b6ce4083 | 384 | end: |
1da177e4 | 385 | |
b6ce4083 VL |
386 | return result; |
387 | } | |
1da177e4 | 388 | |
b6ce4083 VL |
389 | static int acpi_battery_init_update(struct acpi_battery *battery) |
390 | { | |
391 | int result = 0; | |
1da177e4 | 392 | |
b6ce4083 VL |
393 | result = acpi_battery_get_status(battery); |
394 | if (result) | |
395 | return result; | |
1da177e4 | 396 | |
b6ce4083 | 397 | acpi_battery_present_prev(battery) = acpi_battery_present(battery); |
1da177e4 | 398 | |
b6ce4083 VL |
399 | if (acpi_battery_present(battery)) { |
400 | result = acpi_battery_get_info(battery); | |
401 | if (result) | |
402 | return result; | |
403 | result = acpi_battery_get_state(battery); | |
1da177e4 | 404 | if (result) |
d550d98d | 405 | return result; |
1da177e4 | 406 | |
b6ce4083 VL |
407 | acpi_battery_init_alarm(battery); |
408 | } | |
409 | ||
410 | return result; | |
411 | } | |
412 | ||
413 | static int acpi_battery_update(struct acpi_battery *battery, | |
9ea7d575 | 414 | int update, int *update_result_ptr) |
b6ce4083 VL |
415 | { |
416 | int result = 0; | |
417 | int update_result = ACPI_BATTERY_NONE_UPDATE; | |
1da177e4 | 418 | |
b6ce4083 VL |
419 | if (!acpi_battery_present(battery)) { |
420 | update = 1; | |
421 | } | |
1da177e4 | 422 | |
b6ce4083 VL |
423 | if (acpi_battery_init_update_flag(battery)) { |
424 | result = acpi_battery_init_update(battery); | |
425 | if (result) | |
426 | goto end;; | |
427 | update_result = ACPI_BATTERY_INIT_UPDATE; | |
428 | } else if (update) { | |
429 | result = acpi_battery_get_status(battery); | |
430 | if (result) | |
431 | goto end;; | |
9ea7d575 VL |
432 | if (acpi_battery_inserted(battery) |
433 | || acpi_battery_removed(battery)) { | |
b6ce4083 VL |
434 | result = acpi_battery_init_update(battery); |
435 | if (result) | |
436 | goto end;; | |
437 | update_result = ACPI_BATTERY_INIT_UPDATE; | |
438 | } else { | |
439 | update_result = ACPI_BATTERY_EASY_UPDATE; | |
1da177e4 LT |
440 | } |
441 | } | |
442 | ||
b6ce4083 | 443 | end: |
1da177e4 | 444 | |
b6ce4083 | 445 | acpi_battery_init_update_flag(battery) = (result != 0); |
1da177e4 | 446 | |
b6ce4083 | 447 | *update_result_ptr = update_result; |
1da177e4 | 448 | |
d550d98d | 449 | return result; |
1da177e4 LT |
450 | } |
451 | ||
b6ce4083 | 452 | static void acpi_battery_notify_update(struct acpi_battery *battery) |
4bd35cdb | 453 | { |
b6ce4083 VL |
454 | acpi_battery_get_status(battery); |
455 | ||
456 | if (acpi_battery_init_update_flag(battery)) { | |
457 | return; | |
458 | } | |
459 | ||
460 | if (acpi_battery_inserted(battery) || acpi_battery_removed(battery)) { | |
461 | acpi_battery_init_update_flag(battery) = 1; | |
462 | } else { | |
463 | acpi_battery_info_update_flag(battery) = 1; | |
464 | acpi_battery_state_update_flag(battery) = 1; | |
465 | acpi_battery_alarm_update_flag(battery) = 1; | |
4bd35cdb VL |
466 | } |
467 | } | |
468 | ||
1da177e4 LT |
469 | /* -------------------------------------------------------------------------- |
470 | FS Interface (/proc) | |
471 | -------------------------------------------------------------------------- */ | |
472 | ||
4be44fcd | 473 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 VL |
474 | |
475 | static int acpi_battery_read_info_print(struct seq_file *seq, int result) | |
1da177e4 | 476 | { |
50dd0969 | 477 | struct acpi_battery *battery = seq->private; |
1da177e4 | 478 | struct acpi_battery_info *bif = NULL; |
4be44fcd | 479 | char *units = "?"; |
1da177e4 | 480 | |
b6ce4083 | 481 | if (result) |
1da177e4 LT |
482 | goto end; |
483 | ||
b6ce4083 | 484 | if (acpi_battery_present(battery)) |
1da177e4 LT |
485 | seq_printf(seq, "present: yes\n"); |
486 | else { | |
487 | seq_printf(seq, "present: no\n"); | |
488 | goto end; | |
489 | } | |
490 | ||
b6ce4083 VL |
491 | bif = battery->bif_data.pointer; |
492 | if (!bif) { | |
493 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "BIF buffer is NULL")); | |
494 | result = -ENODEV; | |
1da177e4 LT |
495 | goto end; |
496 | } | |
497 | ||
b6ce4083 VL |
498 | /* Battery Units */ |
499 | ||
500 | units = acpi_battery_power_units(battery); | |
4be44fcd | 501 | |
1da177e4 LT |
502 | if (bif->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
503 | seq_printf(seq, "design capacity: unknown\n"); | |
504 | else | |
505 | seq_printf(seq, "design capacity: %d %sh\n", | |
4be44fcd | 506 | (u32) bif->design_capacity, units); |
1da177e4 LT |
507 | |
508 | if (bif->last_full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
509 | seq_printf(seq, "last full capacity: unknown\n"); | |
510 | else | |
511 | seq_printf(seq, "last full capacity: %d %sh\n", | |
4be44fcd | 512 | (u32) bif->last_full_capacity, units); |
1da177e4 LT |
513 | |
514 | switch ((u32) bif->battery_technology) { | |
515 | case 0: | |
516 | seq_printf(seq, "battery technology: non-rechargeable\n"); | |
517 | break; | |
518 | case 1: | |
519 | seq_printf(seq, "battery technology: rechargeable\n"); | |
520 | break; | |
521 | default: | |
522 | seq_printf(seq, "battery technology: unknown\n"); | |
523 | break; | |
524 | } | |
525 | ||
526 | if (bif->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
527 | seq_printf(seq, "design voltage: unknown\n"); | |
528 | else | |
529 | seq_printf(seq, "design voltage: %d mV\n", | |
4be44fcd | 530 | (u32) bif->design_voltage); |
1da177e4 | 531 | seq_printf(seq, "design capacity warning: %d %sh\n", |
4be44fcd | 532 | (u32) bif->design_capacity_warning, units); |
1da177e4 | 533 | seq_printf(seq, "design capacity low: %d %sh\n", |
4be44fcd | 534 | (u32) bif->design_capacity_low, units); |
1da177e4 | 535 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
4be44fcd | 536 | (u32) bif->battery_capacity_granularity_1, units); |
1da177e4 | 537 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
4be44fcd LB |
538 | (u32) bif->battery_capacity_granularity_2, units); |
539 | seq_printf(seq, "model number: %s\n", bif->model_number); | |
540 | seq_printf(seq, "serial number: %s\n", bif->serial_number); | |
541 | seq_printf(seq, "battery type: %s\n", bif->battery_type); | |
542 | seq_printf(seq, "OEM info: %s\n", bif->oem_info); | |
543 | ||
544 | end: | |
1da177e4 | 545 | |
b6ce4083 VL |
546 | if (result) |
547 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
548 | ||
549 | return result; | |
550 | } | |
551 | ||
552 | static int acpi_battery_read_info(struct seq_file *seq, void *offset) | |
553 | { | |
554 | struct acpi_battery *battery = seq->private; | |
555 | int result = 0; | |
556 | int update_result = ACPI_BATTERY_NONE_UPDATE; | |
557 | int update = 0; | |
558 | ||
559 | acpi_battery_mutex_lock(battery); | |
560 | ||
561 | update = (get_seconds() - battery->info_update_time >= update_time); | |
562 | update = (update | acpi_battery_info_update_flag(battery)); | |
563 | ||
564 | result = acpi_battery_update(battery, update, &update_result); | |
565 | if (result) | |
566 | goto end; | |
567 | ||
568 | /* Battery Info (_BIF) */ | |
569 | ||
570 | if (update_result == ACPI_BATTERY_EASY_UPDATE) { | |
571 | result = acpi_battery_get_info(battery); | |
572 | if (result) | |
573 | goto end; | |
574 | } | |
575 | ||
576 | end: | |
577 | ||
578 | result = acpi_battery_read_info_print(seq, result); | |
579 | ||
580 | acpi_battery_check_result(battery, result); | |
581 | ||
582 | acpi_battery_info_update_flag(battery) = result; | |
583 | ||
584 | acpi_battery_mutex_unlock(battery); | |
585 | ||
586 | return result; | |
1da177e4 LT |
587 | } |
588 | ||
589 | static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) | |
590 | { | |
591 | return single_open(file, acpi_battery_read_info, PDE(inode)->data); | |
592 | } | |
593 | ||
b6ce4083 | 594 | static int acpi_battery_read_state_print(struct seq_file *seq, int result) |
1da177e4 | 595 | { |
50dd0969 | 596 | struct acpi_battery *battery = seq->private; |
a1f0eff2 | 597 | struct acpi_battery_state *bst = NULL; |
4be44fcd | 598 | char *units = "?"; |
1da177e4 | 599 | |
b6ce4083 | 600 | if (result) |
1da177e4 LT |
601 | goto end; |
602 | ||
b6ce4083 | 603 | if (acpi_battery_present(battery)) |
1da177e4 LT |
604 | seq_printf(seq, "present: yes\n"); |
605 | else { | |
606 | seq_printf(seq, "present: no\n"); | |
607 | goto end; | |
608 | } | |
609 | ||
b6ce4083 VL |
610 | bst = battery->bst_data.pointer; |
611 | if (!bst) { | |
612 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "BST buffer is NULL")); | |
613 | result = -ENODEV; | |
1da177e4 LT |
614 | goto end; |
615 | } | |
616 | ||
b6ce4083 VL |
617 | /* Battery Units */ |
618 | ||
619 | units = acpi_battery_power_units(battery); | |
620 | ||
1da177e4 LT |
621 | if (!(bst->state & 0x04)) |
622 | seq_printf(seq, "capacity state: ok\n"); | |
623 | else | |
624 | seq_printf(seq, "capacity state: critical\n"); | |
625 | ||
4be44fcd LB |
626 | if ((bst->state & 0x01) && (bst->state & 0x02)) { |
627 | seq_printf(seq, | |
628 | "charging state: charging/discharging\n"); | |
4be44fcd | 629 | } else if (bst->state & 0x01) |
1da177e4 LT |
630 | seq_printf(seq, "charging state: discharging\n"); |
631 | else if (bst->state & 0x02) | |
632 | seq_printf(seq, "charging state: charging\n"); | |
633 | else { | |
634 | seq_printf(seq, "charging state: charged\n"); | |
635 | } | |
636 | ||
637 | if (bst->present_rate == ACPI_BATTERY_VALUE_UNKNOWN) | |
638 | seq_printf(seq, "present rate: unknown\n"); | |
639 | else | |
640 | seq_printf(seq, "present rate: %d %s\n", | |
4be44fcd | 641 | (u32) bst->present_rate, units); |
1da177e4 LT |
642 | |
643 | if (bst->remaining_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
644 | seq_printf(seq, "remaining capacity: unknown\n"); | |
645 | else | |
646 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
4be44fcd | 647 | (u32) bst->remaining_capacity, units); |
1da177e4 LT |
648 | |
649 | if (bst->present_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
650 | seq_printf(seq, "present voltage: unknown\n"); | |
651 | else | |
652 | seq_printf(seq, "present voltage: %d mV\n", | |
4be44fcd | 653 | (u32) bst->present_voltage); |
1da177e4 | 654 | |
4be44fcd | 655 | end: |
1da177e4 | 656 | |
b6ce4083 VL |
657 | if (result) { |
658 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
659 | } | |
660 | ||
661 | return result; | |
662 | } | |
663 | ||
664 | static int acpi_battery_read_state(struct seq_file *seq, void *offset) | |
665 | { | |
666 | struct acpi_battery *battery = seq->private; | |
667 | int result = 0; | |
668 | int update_result = ACPI_BATTERY_NONE_UPDATE; | |
669 | int update = 0; | |
670 | ||
671 | acpi_battery_mutex_lock(battery); | |
672 | ||
673 | update = (get_seconds() - battery->state_update_time >= update_time); | |
674 | update = (update | acpi_battery_state_update_flag(battery)); | |
675 | ||
676 | result = acpi_battery_update(battery, update, &update_result); | |
677 | if (result) | |
678 | goto end; | |
679 | ||
680 | /* Battery State (_BST) */ | |
681 | ||
682 | if (update_result == ACPI_BATTERY_EASY_UPDATE) { | |
683 | result = acpi_battery_get_state(battery); | |
684 | if (result) | |
685 | goto end; | |
686 | } | |
687 | ||
688 | end: | |
689 | ||
690 | result = acpi_battery_read_state_print(seq, result); | |
691 | ||
692 | acpi_battery_check_result(battery, result); | |
693 | ||
694 | acpi_battery_state_update_flag(battery) = result; | |
695 | ||
696 | acpi_battery_mutex_unlock(battery); | |
697 | ||
698 | return result; | |
1da177e4 LT |
699 | } |
700 | ||
701 | static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) | |
702 | { | |
703 | return single_open(file, acpi_battery_read_state, PDE(inode)->data); | |
704 | } | |
705 | ||
b6ce4083 | 706 | static int acpi_battery_read_alarm_print(struct seq_file *seq, int result) |
1da177e4 | 707 | { |
50dd0969 | 708 | struct acpi_battery *battery = seq->private; |
4be44fcd | 709 | char *units = "?"; |
1da177e4 | 710 | |
b6ce4083 | 711 | if (result) |
1da177e4 LT |
712 | goto end; |
713 | ||
b6ce4083 | 714 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
715 | seq_printf(seq, "present: no\n"); |
716 | goto end; | |
717 | } | |
718 | ||
719 | /* Battery Units */ | |
4be44fcd | 720 | |
b6ce4083 | 721 | units = acpi_battery_power_units(battery); |
1da177e4 LT |
722 | |
723 | seq_printf(seq, "alarm: "); | |
724 | if (!battery->alarm) | |
725 | seq_printf(seq, "unsupported\n"); | |
726 | else | |
b6ce4083 | 727 | seq_printf(seq, "%lu %sh\n", battery->alarm, units); |
1da177e4 | 728 | |
4be44fcd | 729 | end: |
b6ce4083 VL |
730 | |
731 | if (result) | |
732 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
733 | ||
734 | return result; | |
735 | } | |
736 | ||
737 | static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) | |
738 | { | |
739 | struct acpi_battery *battery = seq->private; | |
740 | int result = 0; | |
741 | int update_result = ACPI_BATTERY_NONE_UPDATE; | |
742 | int update = 0; | |
743 | ||
744 | acpi_battery_mutex_lock(battery); | |
745 | ||
746 | update = (get_seconds() - battery->alarm_update_time >= update_time); | |
747 | update = (update | acpi_battery_alarm_update_flag(battery)); | |
748 | ||
749 | result = acpi_battery_update(battery, update, &update_result); | |
750 | if (result) | |
751 | goto end; | |
752 | ||
753 | /* Battery Alarm */ | |
754 | ||
755 | if (update_result == ACPI_BATTERY_EASY_UPDATE) { | |
756 | result = acpi_battery_get_alarm(battery); | |
757 | if (result) | |
758 | goto end; | |
759 | } | |
760 | ||
761 | end: | |
762 | ||
763 | result = acpi_battery_read_alarm_print(seq, result); | |
764 | ||
765 | acpi_battery_check_result(battery, result); | |
766 | ||
767 | acpi_battery_alarm_update_flag(battery) = result; | |
768 | ||
769 | acpi_battery_mutex_unlock(battery); | |
770 | ||
771 | return result; | |
1da177e4 LT |
772 | } |
773 | ||
1da177e4 | 774 | static ssize_t |
4be44fcd LB |
775 | acpi_battery_write_alarm(struct file *file, |
776 | const char __user * buffer, | |
777 | size_t count, loff_t * ppos) | |
1da177e4 | 778 | { |
4be44fcd LB |
779 | int result = 0; |
780 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
781 | struct seq_file *m = file->private_data; |
782 | struct acpi_battery *battery = m->private; | |
b6ce4083 | 783 | int update_result = ACPI_BATTERY_NONE_UPDATE; |
1da177e4 | 784 | |
1da177e4 | 785 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 786 | return -EINVAL; |
1da177e4 | 787 | |
b6ce4083 | 788 | acpi_battery_mutex_lock(battery); |
4bd35cdb | 789 | |
b6ce4083 VL |
790 | result = acpi_battery_update(battery, 1, &update_result); |
791 | if (result) { | |
792 | result = -ENODEV; | |
793 | goto end; | |
794 | } | |
1da177e4 | 795 | |
b6ce4083 VL |
796 | if (!acpi_battery_present(battery)) { |
797 | result = -ENODEV; | |
798 | goto end; | |
799 | } | |
800 | ||
801 | if (copy_from_user(alarm_string, buffer, count)) { | |
802 | result = -EFAULT; | |
803 | goto end; | |
804 | } | |
4be44fcd | 805 | |
1da177e4 LT |
806 | alarm_string[count] = '\0'; |
807 | ||
4be44fcd LB |
808 | result = acpi_battery_set_alarm(battery, |
809 | simple_strtoul(alarm_string, NULL, 0)); | |
1da177e4 | 810 | if (result) |
b6ce4083 VL |
811 | goto end; |
812 | ||
813 | end: | |
814 | ||
815 | acpi_battery_check_result(battery, result); | |
1da177e4 | 816 | |
b6ce4083 VL |
817 | if (!result) |
818 | result = count; | |
819 | ||
820 | acpi_battery_mutex_unlock(battery); | |
821 | ||
822 | return result; | |
1da177e4 LT |
823 | } |
824 | ||
825 | static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) | |
826 | { | |
827 | return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); | |
828 | } | |
829 | ||
d7508032 | 830 | static const struct file_operations acpi_battery_info_ops = { |
4be44fcd LB |
831 | .open = acpi_battery_info_open_fs, |
832 | .read = seq_read, | |
833 | .llseek = seq_lseek, | |
834 | .release = single_release, | |
1da177e4 LT |
835 | .owner = THIS_MODULE, |
836 | }; | |
837 | ||
d7508032 | 838 | static const struct file_operations acpi_battery_state_ops = { |
4be44fcd LB |
839 | .open = acpi_battery_state_open_fs, |
840 | .read = seq_read, | |
841 | .llseek = seq_lseek, | |
842 | .release = single_release, | |
1da177e4 LT |
843 | .owner = THIS_MODULE, |
844 | }; | |
845 | ||
d7508032 | 846 | static const struct file_operations acpi_battery_alarm_ops = { |
4be44fcd LB |
847 | .open = acpi_battery_alarm_open_fs, |
848 | .read = seq_read, | |
849 | .write = acpi_battery_write_alarm, | |
850 | .llseek = seq_lseek, | |
851 | .release = single_release, | |
1da177e4 LT |
852 | .owner = THIS_MODULE, |
853 | }; | |
854 | ||
4be44fcd | 855 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 856 | { |
4be44fcd | 857 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 858 | |
1da177e4 LT |
859 | if (!acpi_device_dir(device)) { |
860 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 861 | acpi_battery_dir); |
1da177e4 | 862 | if (!acpi_device_dir(device)) |
d550d98d | 863 | return -ENODEV; |
1da177e4 LT |
864 | acpi_device_dir(device)->owner = THIS_MODULE; |
865 | } | |
866 | ||
867 | /* 'info' [R] */ | |
868 | entry = create_proc_entry(ACPI_BATTERY_FILE_INFO, | |
4be44fcd | 869 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 870 | if (!entry) |
d550d98d | 871 | return -ENODEV; |
1da177e4 | 872 | else { |
4be44fcd | 873 | entry->proc_fops = &acpi_battery_info_ops; |
1da177e4 LT |
874 | entry->data = acpi_driver_data(device); |
875 | entry->owner = THIS_MODULE; | |
876 | } | |
877 | ||
878 | /* 'status' [R] */ | |
a1f0eff2 | 879 | entry = create_proc_entry(ACPI_BATTERY_FILE_STATE, |
4be44fcd | 880 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 881 | if (!entry) |
d550d98d | 882 | return -ENODEV; |
1da177e4 LT |
883 | else { |
884 | entry->proc_fops = &acpi_battery_state_ops; | |
885 | entry->data = acpi_driver_data(device); | |
886 | entry->owner = THIS_MODULE; | |
887 | } | |
888 | ||
889 | /* 'alarm' [R/W] */ | |
890 | entry = create_proc_entry(ACPI_BATTERY_FILE_ALARM, | |
4be44fcd LB |
891 | S_IFREG | S_IRUGO | S_IWUSR, |
892 | acpi_device_dir(device)); | |
1da177e4 | 893 | if (!entry) |
d550d98d | 894 | return -ENODEV; |
1da177e4 LT |
895 | else { |
896 | entry->proc_fops = &acpi_battery_alarm_ops; | |
897 | entry->data = acpi_driver_data(device); | |
898 | entry->owner = THIS_MODULE; | |
899 | } | |
900 | ||
d550d98d | 901 | return 0; |
1da177e4 LT |
902 | } |
903 | ||
4be44fcd | 904 | static int acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 905 | { |
1da177e4 LT |
906 | if (acpi_device_dir(device)) { |
907 | remove_proc_entry(ACPI_BATTERY_FILE_ALARM, | |
908 | acpi_device_dir(device)); | |
a1f0eff2 | 909 | remove_proc_entry(ACPI_BATTERY_FILE_STATE, |
1da177e4 LT |
910 | acpi_device_dir(device)); |
911 | remove_proc_entry(ACPI_BATTERY_FILE_INFO, | |
912 | acpi_device_dir(device)); | |
913 | ||
914 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
915 | acpi_device_dir(device) = NULL; | |
916 | } | |
917 | ||
d550d98d | 918 | return 0; |
1da177e4 LT |
919 | } |
920 | ||
1da177e4 LT |
921 | /* -------------------------------------------------------------------------- |
922 | Driver Interface | |
923 | -------------------------------------------------------------------------- */ | |
924 | ||
4be44fcd | 925 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 926 | { |
50dd0969 | 927 | struct acpi_battery *battery = data; |
4be44fcd | 928 | struct acpi_device *device = NULL; |
1da177e4 | 929 | |
1da177e4 | 930 | if (!battery) |
d550d98d | 931 | return; |
1da177e4 | 932 | |
145def84 | 933 | device = battery->device; |
1da177e4 LT |
934 | |
935 | switch (event) { | |
936 | case ACPI_BATTERY_NOTIFY_STATUS: | |
937 | case ACPI_BATTERY_NOTIFY_INFO: | |
9fdae727 VL |
938 | case ACPI_NOTIFY_BUS_CHECK: |
939 | case ACPI_NOTIFY_DEVICE_CHECK: | |
b6ce4083 VL |
940 | device = battery->device; |
941 | acpi_battery_notify_update(battery); | |
9ea7d575 VL |
942 | acpi_bus_generate_event(device, event, |
943 | acpi_battery_present(battery)); | |
1da177e4 LT |
944 | break; |
945 | default: | |
946 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 947 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
948 | break; |
949 | } | |
950 | ||
d550d98d | 951 | return; |
1da177e4 LT |
952 | } |
953 | ||
4be44fcd | 954 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 955 | { |
4be44fcd LB |
956 | int result = 0; |
957 | acpi_status status = 0; | |
958 | struct acpi_battery *battery = NULL; | |
1da177e4 | 959 | |
1da177e4 | 960 | if (!device) |
d550d98d | 961 | return -EINVAL; |
1da177e4 | 962 | |
36bcbec7 | 963 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 964 | if (!battery) |
d550d98d | 965 | return -ENOMEM; |
1da177e4 | 966 | |
b6ce4083 VL |
967 | mutex_init(&battery->mutex); |
968 | ||
969 | acpi_battery_mutex_lock(battery); | |
970 | ||
145def84 | 971 | battery->device = device; |
1da177e4 LT |
972 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
973 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
974 | acpi_driver_data(device) = battery; | |
975 | ||
b6ce4083 | 976 | result = acpi_battery_get_status(battery); |
1da177e4 LT |
977 | if (result) |
978 | goto end; | |
979 | ||
b6ce4083 VL |
980 | acpi_battery_init_update_flag(battery) = 1; |
981 | ||
1da177e4 LT |
982 | result = acpi_battery_add_fs(device); |
983 | if (result) | |
984 | goto end; | |
985 | ||
3b073ec3 | 986 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 987 | ACPI_ALL_NOTIFY, |
4be44fcd | 988 | acpi_battery_notify, battery); |
1da177e4 | 989 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 990 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
991 | result = -ENODEV; |
992 | goto end; | |
993 | } | |
994 | ||
995 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", | |
4be44fcd LB |
996 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
997 | device->status.battery_present ? "present" : "absent"); | |
998 | ||
999 | end: | |
b6ce4083 | 1000 | |
1da177e4 LT |
1001 | if (result) { |
1002 | acpi_battery_remove_fs(device); | |
1003 | kfree(battery); | |
1004 | } | |
1005 | ||
b6ce4083 VL |
1006 | acpi_battery_mutex_unlock(battery); |
1007 | ||
d550d98d | 1008 | return result; |
1da177e4 LT |
1009 | } |
1010 | ||
4be44fcd | 1011 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 1012 | { |
4be44fcd LB |
1013 | acpi_status status = 0; |
1014 | struct acpi_battery *battery = NULL; | |
1da177e4 | 1015 | |
1da177e4 | 1016 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1017 | return -EINVAL; |
1da177e4 | 1018 | |
50dd0969 | 1019 | battery = acpi_driver_data(device); |
1da177e4 | 1020 | |
b6ce4083 VL |
1021 | acpi_battery_mutex_lock(battery); |
1022 | ||
3b073ec3 | 1023 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 1024 | ACPI_ALL_NOTIFY, |
4be44fcd | 1025 | acpi_battery_notify); |
1da177e4 LT |
1026 | |
1027 | acpi_battery_remove_fs(device); | |
1028 | ||
b6ce4083 VL |
1029 | if (battery->bif_data.pointer) |
1030 | kfree(battery->bif_data.pointer); | |
1031 | ||
1032 | if (battery->bst_data.pointer) | |
1033 | kfree(battery->bst_data.pointer); | |
1034 | ||
1035 | acpi_battery_mutex_unlock(battery); | |
1036 | ||
1037 | mutex_destroy(&battery->mutex); | |
1038 | ||
1da177e4 LT |
1039 | kfree(battery); |
1040 | ||
d550d98d | 1041 | return 0; |
1da177e4 LT |
1042 | } |
1043 | ||
34c4415a | 1044 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 1045 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
1046 | { |
1047 | struct acpi_battery *battery; | |
1048 | ||
1049 | if (!device) | |
1050 | return -EINVAL; | |
1051 | ||
1052 | battery = device->driver_data; | |
b6ce4083 VL |
1053 | |
1054 | acpi_battery_init_update_flag(battery) = 1; | |
1055 | ||
1056 | return 0; | |
34c4415a JK |
1057 | } |
1058 | ||
4be44fcd | 1059 | static int __init acpi_battery_init(void) |
1da177e4 | 1060 | { |
3f86b832 | 1061 | int result; |
1da177e4 | 1062 | |
4d8316d5 PM |
1063 | if (acpi_disabled) |
1064 | return -ENODEV; | |
1065 | ||
3f86b832 | 1066 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 1067 | if (!acpi_battery_dir) |
d550d98d | 1068 | return -ENODEV; |
1da177e4 LT |
1069 | |
1070 | result = acpi_bus_register_driver(&acpi_battery_driver); | |
1071 | if (result < 0) { | |
3f86b832 | 1072 | acpi_unlock_battery_dir(acpi_battery_dir); |
d550d98d | 1073 | return -ENODEV; |
1da177e4 LT |
1074 | } |
1075 | ||
d550d98d | 1076 | return 0; |
1da177e4 LT |
1077 | } |
1078 | ||
4be44fcd | 1079 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1080 | { |
1da177e4 LT |
1081 | acpi_bus_unregister_driver(&acpi_battery_driver); |
1082 | ||
3f86b832 | 1083 | acpi_unlock_battery_dir(acpi_battery_dir); |
1da177e4 | 1084 | |
d550d98d | 1085 | return; |
1da177e4 LT |
1086 | } |
1087 | ||
1da177e4 LT |
1088 | module_init(acpi_battery_init); |
1089 | module_exit(acpi_battery_exit); |