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" | |
1da177e4 | 44 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
45 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
46 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
47 | #define ACPI_BATTERY_UNITS_WATTS "mW" | |
48 | #define ACPI_BATTERY_UNITS_AMPS "mA" | |
49 | ||
1da177e4 | 50 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 VL |
51 | |
52 | #define ACPI_BATTERY_UPDATE_TIME 0 | |
53 | ||
54 | #define ACPI_BATTERY_NONE_UPDATE 0 | |
55 | #define ACPI_BATTERY_EASY_UPDATE 1 | |
56 | #define ACPI_BATTERY_INIT_UPDATE 2 | |
57 | ||
f52fd66d | 58 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 59 | |
f52fd66d | 60 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 61 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
62 | MODULE_LICENSE("GPL"); |
63 | ||
b6ce4083 VL |
64 | static unsigned int update_time = ACPI_BATTERY_UPDATE_TIME; |
65 | ||
66 | /* 0 - every time, > 0 - by update_time */ | |
67 | module_param(update_time, uint, 0644); | |
68 | ||
3f86b832 RT |
69 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
70 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
71 | ||
4be44fcd LB |
72 | static int acpi_battery_add(struct acpi_device *device); |
73 | static int acpi_battery_remove(struct acpi_device *device, int type); | |
5d9464a4 | 74 | static int acpi_battery_resume(struct acpi_device *device); |
1da177e4 | 75 | |
1ba90e3a TR |
76 | static const struct acpi_device_id battery_device_ids[] = { |
77 | {"PNP0C0A", 0}, | |
78 | {"", 0}, | |
79 | }; | |
80 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); | |
81 | ||
1da177e4 | 82 | static struct acpi_driver acpi_battery_driver = { |
c2b6705b | 83 | .name = "battery", |
4be44fcd | 84 | .class = ACPI_BATTERY_CLASS, |
1ba90e3a | 85 | .ids = battery_device_ids, |
4be44fcd LB |
86 | .ops = { |
87 | .add = acpi_battery_add, | |
34c4415a | 88 | .resume = acpi_battery_resume, |
4be44fcd LB |
89 | .remove = acpi_battery_remove, |
90 | }, | |
1da177e4 LT |
91 | }; |
92 | ||
a1f0eff2 | 93 | struct acpi_battery_state { |
4be44fcd LB |
94 | acpi_integer state; |
95 | acpi_integer present_rate; | |
96 | acpi_integer remaining_capacity; | |
97 | acpi_integer present_voltage; | |
1da177e4 LT |
98 | }; |
99 | ||
100 | struct acpi_battery_info { | |
4be44fcd LB |
101 | acpi_integer power_unit; |
102 | acpi_integer design_capacity; | |
103 | acpi_integer last_full_capacity; | |
104 | acpi_integer battery_technology; | |
105 | acpi_integer design_voltage; | |
106 | acpi_integer design_capacity_warning; | |
107 | acpi_integer design_capacity_low; | |
108 | acpi_integer battery_capacity_granularity_1; | |
109 | acpi_integer battery_capacity_granularity_2; | |
110 | acpi_string model_number; | |
111 | acpi_string serial_number; | |
112 | acpi_string battery_type; | |
113 | acpi_string oem_info; | |
1da177e4 LT |
114 | }; |
115 | ||
3bd92ba1 | 116 | enum acpi_battery_files { |
78490d82 AS |
117 | ACPI_BATTERY_INFO = 0, |
118 | ACPI_BATTERY_STATE, | |
119 | ACPI_BATTERY_ALARM, | |
120 | ACPI_BATTERY_NUMFILES, | |
121 | }; | |
122 | ||
1da177e4 | 123 | struct acpi_battery_flags { |
b6ce4083 VL |
124 | u8 battery_present_prev; |
125 | u8 alarm_present; | |
126 | u8 init_update; | |
78490d82 | 127 | u8 update[ACPI_BATTERY_NUMFILES]; |
b6ce4083 | 128 | u8 power_unit; |
1da177e4 LT |
129 | }; |
130 | ||
131 | struct acpi_battery { | |
9ea7d575 | 132 | struct acpi_device *device; |
1da177e4 | 133 | struct acpi_battery_flags flags; |
b6ce4083 VL |
134 | struct acpi_buffer bif_data; |
135 | struct acpi_buffer bst_data; | |
3bd92ba1 | 136 | struct mutex lock; |
4be44fcd | 137 | unsigned long alarm; |
78490d82 | 138 | unsigned long update_time[ACPI_BATTERY_NUMFILES]; |
3bd92ba1 | 139 | |
1da177e4 LT |
140 | }; |
141 | ||
78490d82 | 142 | inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 143 | { |
78490d82 AS |
144 | return battery->device->status.battery_present; |
145 | } | |
146 | inline char *acpi_battery_power_units(struct acpi_battery *battery) | |
147 | { | |
148 | if (battery->flags.power_unit) | |
149 | return ACPI_BATTERY_UNITS_AMPS; | |
150 | else | |
151 | return ACPI_BATTERY_UNITS_WATTS; | |
b6ce4083 VL |
152 | } |
153 | ||
78490d82 | 154 | inline acpi_handle acpi_battery_handle(struct acpi_battery *battery) |
b6ce4083 | 155 | { |
78490d82 | 156 | return battery->device->handle; |
b6ce4083 VL |
157 | } |
158 | ||
78490d82 AS |
159 | /* -------------------------------------------------------------------------- |
160 | Battery Management | |
161 | -------------------------------------------------------------------------- */ | |
162 | ||
b6ce4083 VL |
163 | static void acpi_battery_check_result(struct acpi_battery *battery, int result) |
164 | { | |
165 | if (!battery) | |
166 | return; | |
167 | ||
168 | if (result) { | |
78490d82 | 169 | battery->flags.init_update = 1; |
b6ce4083 VL |
170 | } |
171 | } | |
172 | ||
173 | static int acpi_battery_extract_package(struct acpi_battery *battery, | |
174 | union acpi_object *package, | |
175 | struct acpi_buffer *format, | |
176 | struct acpi_buffer *data, | |
177 | char *package_name) | |
178 | { | |
179 | acpi_status status = AE_OK; | |
180 | struct acpi_buffer data_null = { 0, NULL }; | |
181 | ||
182 | status = acpi_extract_package(package, format, &data_null); | |
183 | if (status != AE_BUFFER_OVERFLOW) { | |
184 | ACPI_EXCEPTION((AE_INFO, status, "Extracting size %s", | |
185 | package_name)); | |
186 | return -ENODEV; | |
187 | } | |
188 | ||
189 | if (data_null.length != data->length) { | |
78490d82 | 190 | kfree(data->pointer); |
b6ce4083 VL |
191 | data->pointer = kzalloc(data_null.length, GFP_KERNEL); |
192 | if (!data->pointer) { | |
193 | ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, "kzalloc()")); | |
194 | return -ENOMEM; | |
195 | } | |
196 | data->length = data_null.length; | |
197 | } | |
198 | ||
199 | status = acpi_extract_package(package, format, data); | |
200 | if (ACPI_FAILURE(status)) { | |
201 | ACPI_EXCEPTION((AE_INFO, status, "Extracting %s", | |
202 | package_name)); | |
203 | return -ENODEV; | |
204 | } | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
210 | { | |
211 | int result = 0; | |
212 | ||
213 | result = acpi_bus_get_status(battery->device); | |
214 | if (result) { | |
215 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); | |
216 | return -ENODEV; | |
217 | } | |
218 | return result; | |
219 | } | |
220 | ||
221 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 222 | { |
4be44fcd LB |
223 | int result = 0; |
224 | acpi_status status = 0; | |
225 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
226 | struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BIF), | |
227 | ACPI_BATTERY_FORMAT_BIF | |
228 | }; | |
4be44fcd | 229 | union acpi_object *package = NULL; |
b6ce4083 VL |
230 | struct acpi_buffer *data = NULL; |
231 | struct acpi_battery_info *bif = NULL; | |
1da177e4 | 232 | |
78490d82 | 233 | battery->update_time[ACPI_BATTERY_INFO] = get_seconds(); |
1da177e4 | 234 | |
b6ce4083 VL |
235 | if (!acpi_battery_present(battery)) |
236 | return 0; | |
1da177e4 | 237 | |
78490d82 | 238 | /* Evaluate _BIF */ |
3bd92ba1 AS |
239 | mutex_lock(&battery->lock); |
240 | status = acpi_evaluate_object(acpi_battery_handle(battery), "_BIF", | |
241 | NULL, &buffer); | |
242 | mutex_unlock(&battery->lock); | |
1da177e4 | 243 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 244 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 245 | return -ENODEV; |
1da177e4 LT |
246 | } |
247 | ||
50dd0969 | 248 | package = buffer.pointer; |
1da177e4 | 249 | |
b6ce4083 VL |
250 | data = &battery->bif_data; |
251 | ||
1da177e4 LT |
252 | /* Extract Package Data */ |
253 | ||
9ea7d575 VL |
254 | result = |
255 | acpi_battery_extract_package(battery, package, &format, data, | |
256 | "_BIF"); | |
b6ce4083 | 257 | if (result) |
1da177e4 | 258 | goto end; |
1da177e4 | 259 | |
b6ce4083 | 260 | end: |
1da177e4 | 261 | |
78490d82 | 262 | kfree(buffer.pointer); |
1da177e4 | 263 | |
b6ce4083 VL |
264 | if (!result) { |
265 | bif = data->pointer; | |
266 | battery->flags.power_unit = bif->power_unit; | |
267 | } | |
1da177e4 | 268 | |
d550d98d | 269 | return result; |
1da177e4 LT |
270 | } |
271 | ||
b6ce4083 | 272 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 273 | { |
4be44fcd LB |
274 | int result = 0; |
275 | acpi_status status = 0; | |
276 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
277 | struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BST), | |
278 | ACPI_BATTERY_FORMAT_BST | |
279 | }; | |
4be44fcd | 280 | union acpi_object *package = NULL; |
b6ce4083 | 281 | struct acpi_buffer *data = NULL; |
1da177e4 | 282 | |
78490d82 | 283 | battery->update_time[ACPI_BATTERY_STATE] = get_seconds(); |
1da177e4 | 284 | |
b6ce4083 VL |
285 | if (!acpi_battery_present(battery)) |
286 | return 0; | |
1da177e4 | 287 | |
78490d82 | 288 | /* Evaluate _BST */ |
3bd92ba1 AS |
289 | mutex_lock(&battery->lock); |
290 | status = acpi_evaluate_object(acpi_battery_handle(battery), "_BST", | |
291 | NULL, &buffer); | |
292 | mutex_unlock(&battery->lock); | |
1da177e4 | 293 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 294 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 295 | return -ENODEV; |
1da177e4 LT |
296 | } |
297 | ||
50dd0969 | 298 | package = buffer.pointer; |
1da177e4 | 299 | |
b6ce4083 | 300 | data = &battery->bst_data; |
1da177e4 | 301 | |
b6ce4083 | 302 | /* Extract Package Data */ |
1da177e4 | 303 | |
9ea7d575 VL |
304 | result = |
305 | acpi_battery_extract_package(battery, package, &format, data, | |
306 | "_BST"); | |
b6ce4083 | 307 | if (result) |
1da177e4 | 308 | goto end; |
1da177e4 | 309 | |
b6ce4083 | 310 | end: |
78490d82 | 311 | kfree(buffer.pointer); |
1da177e4 | 312 | |
b6ce4083 VL |
313 | return result; |
314 | } | |
1da177e4 | 315 | |
b6ce4083 VL |
316 | static int acpi_battery_get_alarm(struct acpi_battery *battery) |
317 | { | |
78490d82 | 318 | battery->update_time[ACPI_BATTERY_ALARM] = get_seconds(); |
1da177e4 | 319 | |
b6ce4083 | 320 | return 0; |
1da177e4 LT |
321 | } |
322 | ||
9ea7d575 VL |
323 | static int acpi_battery_set_alarm(struct acpi_battery *battery, |
324 | unsigned long alarm) | |
1da177e4 | 325 | { |
4be44fcd LB |
326 | acpi_status status = 0; |
327 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
328 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
1da177e4 | 329 | |
78490d82 | 330 | battery->update_time[ACPI_BATTERY_ALARM] = get_seconds(); |
1da177e4 | 331 | |
b6ce4083 VL |
332 | if (!acpi_battery_present(battery)) |
333 | return -ENODEV; | |
1da177e4 | 334 | |
78490d82 | 335 | if (!battery->flags.alarm_present) |
d550d98d | 336 | return -ENODEV; |
1da177e4 LT |
337 | |
338 | arg0.integer.value = alarm; | |
339 | ||
3bd92ba1 AS |
340 | mutex_lock(&battery->lock); |
341 | status = acpi_evaluate_object(acpi_battery_handle(battery), "_BTP", | |
9ea7d575 | 342 | &arg_list, NULL); |
3bd92ba1 | 343 | mutex_unlock(&battery->lock); |
1da177e4 | 344 | if (ACPI_FAILURE(status)) |
d550d98d | 345 | return -ENODEV; |
1da177e4 LT |
346 | |
347 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", (u32) alarm)); | |
348 | ||
349 | battery->alarm = alarm; | |
350 | ||
d550d98d | 351 | return 0; |
1da177e4 LT |
352 | } |
353 | ||
b6ce4083 | 354 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 355 | { |
4be44fcd LB |
356 | int result = 0; |
357 | acpi_status status = AE_OK; | |
358 | acpi_handle handle = NULL; | |
b6ce4083 VL |
359 | struct acpi_battery_info *bif = battery->bif_data.pointer; |
360 | unsigned long alarm = battery->alarm; | |
4be44fcd | 361 | |
b6ce4083 | 362 | /* See if alarms are supported, and if so, set default */ |
1da177e4 | 363 | |
b6ce4083 VL |
364 | status = acpi_get_handle(acpi_battery_handle(battery), "_BTP", &handle); |
365 | if (ACPI_SUCCESS(status)) { | |
78490d82 | 366 | battery->flags.alarm_present = 1; |
b6ce4083 VL |
367 | if (!alarm && bif) { |
368 | alarm = bif->design_capacity_warning; | |
369 | } | |
370 | result = acpi_battery_set_alarm(battery, alarm); | |
371 | if (result) | |
372 | goto end; | |
373 | } else { | |
78490d82 | 374 | battery->flags.alarm_present = 0; |
b6ce4083 | 375 | } |
1da177e4 | 376 | |
b6ce4083 | 377 | end: |
1da177e4 | 378 | |
b6ce4083 VL |
379 | return result; |
380 | } | |
1da177e4 | 381 | |
b6ce4083 VL |
382 | static int acpi_battery_init_update(struct acpi_battery *battery) |
383 | { | |
384 | int result = 0; | |
1da177e4 | 385 | |
b6ce4083 VL |
386 | result = acpi_battery_get_status(battery); |
387 | if (result) | |
388 | return result; | |
1da177e4 | 389 | |
78490d82 | 390 | battery->flags.battery_present_prev = acpi_battery_present(battery); |
1da177e4 | 391 | |
b6ce4083 VL |
392 | if (acpi_battery_present(battery)) { |
393 | result = acpi_battery_get_info(battery); | |
394 | if (result) | |
395 | return result; | |
396 | result = acpi_battery_get_state(battery); | |
1da177e4 | 397 | if (result) |
d550d98d | 398 | return result; |
1da177e4 | 399 | |
b6ce4083 VL |
400 | acpi_battery_init_alarm(battery); |
401 | } | |
402 | ||
403 | return result; | |
404 | } | |
405 | ||
406 | static int acpi_battery_update(struct acpi_battery *battery, | |
9ea7d575 | 407 | int update, int *update_result_ptr) |
b6ce4083 VL |
408 | { |
409 | int result = 0; | |
410 | int update_result = ACPI_BATTERY_NONE_UPDATE; | |
1da177e4 | 411 | |
b6ce4083 VL |
412 | if (!acpi_battery_present(battery)) { |
413 | update = 1; | |
414 | } | |
1da177e4 | 415 | |
78490d82 | 416 | if (battery->flags.init_update) { |
b6ce4083 VL |
417 | result = acpi_battery_init_update(battery); |
418 | if (result) | |
78490d82 | 419 | goto end; |
b6ce4083 VL |
420 | update_result = ACPI_BATTERY_INIT_UPDATE; |
421 | } else if (update) { | |
422 | result = acpi_battery_get_status(battery); | |
423 | if (result) | |
78490d82 AS |
424 | goto end; |
425 | if ((!battery->flags.battery_present_prev & acpi_battery_present(battery)) | |
426 | || (battery->flags.battery_present_prev & !acpi_battery_present(battery))) { | |
b6ce4083 VL |
427 | result = acpi_battery_init_update(battery); |
428 | if (result) | |
78490d82 | 429 | goto end; |
b6ce4083 VL |
430 | update_result = ACPI_BATTERY_INIT_UPDATE; |
431 | } else { | |
432 | update_result = ACPI_BATTERY_EASY_UPDATE; | |
1da177e4 LT |
433 | } |
434 | } | |
435 | ||
b6ce4083 | 436 | end: |
1da177e4 | 437 | |
78490d82 | 438 | battery->flags.init_update = (result != 0); |
1da177e4 | 439 | |
b6ce4083 | 440 | *update_result_ptr = update_result; |
1da177e4 | 441 | |
d550d98d | 442 | return result; |
1da177e4 LT |
443 | } |
444 | ||
b6ce4083 | 445 | static void acpi_battery_notify_update(struct acpi_battery *battery) |
4bd35cdb | 446 | { |
b6ce4083 VL |
447 | acpi_battery_get_status(battery); |
448 | ||
78490d82 | 449 | if (battery->flags.init_update) { |
b6ce4083 VL |
450 | return; |
451 | } | |
452 | ||
78490d82 AS |
453 | if ((!battery->flags.battery_present_prev & |
454 | acpi_battery_present(battery)) || | |
455 | (battery->flags.battery_present_prev & | |
456 | !acpi_battery_present(battery))) { | |
457 | battery->flags.init_update = 1; | |
b6ce4083 | 458 | } else { |
78490d82 AS |
459 | battery->flags.update[ACPI_BATTERY_INFO] = 1; |
460 | battery->flags.update[ACPI_BATTERY_STATE] = 1; | |
461 | battery->flags.update[ACPI_BATTERY_ALARM] = 1; | |
4bd35cdb VL |
462 | } |
463 | } | |
464 | ||
1da177e4 LT |
465 | /* -------------------------------------------------------------------------- |
466 | FS Interface (/proc) | |
467 | -------------------------------------------------------------------------- */ | |
468 | ||
4be44fcd | 469 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 470 | |
78490d82 | 471 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 472 | { |
50dd0969 | 473 | struct acpi_battery *battery = seq->private; |
1da177e4 | 474 | struct acpi_battery_info *bif = NULL; |
4be44fcd | 475 | char *units = "?"; |
1da177e4 | 476 | |
b6ce4083 | 477 | if (result) |
1da177e4 LT |
478 | goto end; |
479 | ||
b6ce4083 | 480 | if (acpi_battery_present(battery)) |
1da177e4 LT |
481 | seq_printf(seq, "present: yes\n"); |
482 | else { | |
483 | seq_printf(seq, "present: no\n"); | |
484 | goto end; | |
485 | } | |
486 | ||
b6ce4083 VL |
487 | bif = battery->bif_data.pointer; |
488 | if (!bif) { | |
489 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "BIF buffer is NULL")); | |
490 | result = -ENODEV; | |
1da177e4 LT |
491 | goto end; |
492 | } | |
493 | ||
b6ce4083 VL |
494 | /* Battery Units */ |
495 | ||
496 | units = acpi_battery_power_units(battery); | |
4be44fcd | 497 | |
1da177e4 LT |
498 | if (bif->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
499 | seq_printf(seq, "design capacity: unknown\n"); | |
500 | else | |
501 | seq_printf(seq, "design capacity: %d %sh\n", | |
4be44fcd | 502 | (u32) bif->design_capacity, units); |
1da177e4 LT |
503 | |
504 | if (bif->last_full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
505 | seq_printf(seq, "last full capacity: unknown\n"); | |
506 | else | |
507 | seq_printf(seq, "last full capacity: %d %sh\n", | |
4be44fcd | 508 | (u32) bif->last_full_capacity, units); |
1da177e4 LT |
509 | |
510 | switch ((u32) bif->battery_technology) { | |
511 | case 0: | |
512 | seq_printf(seq, "battery technology: non-rechargeable\n"); | |
513 | break; | |
514 | case 1: | |
515 | seq_printf(seq, "battery technology: rechargeable\n"); | |
516 | break; | |
517 | default: | |
518 | seq_printf(seq, "battery technology: unknown\n"); | |
519 | break; | |
520 | } | |
521 | ||
522 | if (bif->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
523 | seq_printf(seq, "design voltage: unknown\n"); | |
524 | else | |
525 | seq_printf(seq, "design voltage: %d mV\n", | |
4be44fcd | 526 | (u32) bif->design_voltage); |
1da177e4 | 527 | seq_printf(seq, "design capacity warning: %d %sh\n", |
4be44fcd | 528 | (u32) bif->design_capacity_warning, units); |
1da177e4 | 529 | seq_printf(seq, "design capacity low: %d %sh\n", |
4be44fcd | 530 | (u32) bif->design_capacity_low, units); |
1da177e4 | 531 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
4be44fcd | 532 | (u32) bif->battery_capacity_granularity_1, units); |
1da177e4 | 533 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
4be44fcd LB |
534 | (u32) bif->battery_capacity_granularity_2, units); |
535 | seq_printf(seq, "model number: %s\n", bif->model_number); | |
536 | seq_printf(seq, "serial number: %s\n", bif->serial_number); | |
537 | seq_printf(seq, "battery type: %s\n", bif->battery_type); | |
538 | seq_printf(seq, "OEM info: %s\n", bif->oem_info); | |
539 | ||
540 | end: | |
1da177e4 | 541 | |
b6ce4083 VL |
542 | if (result) |
543 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
544 | ||
545 | return result; | |
546 | } | |
547 | ||
78490d82 | 548 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 549 | { |
50dd0969 | 550 | struct acpi_battery *battery = seq->private; |
a1f0eff2 | 551 | struct acpi_battery_state *bst = NULL; |
4be44fcd | 552 | char *units = "?"; |
1da177e4 | 553 | |
b6ce4083 | 554 | if (result) |
1da177e4 LT |
555 | goto end; |
556 | ||
b6ce4083 | 557 | if (acpi_battery_present(battery)) |
1da177e4 LT |
558 | seq_printf(seq, "present: yes\n"); |
559 | else { | |
560 | seq_printf(seq, "present: no\n"); | |
561 | goto end; | |
562 | } | |
563 | ||
b6ce4083 VL |
564 | bst = battery->bst_data.pointer; |
565 | if (!bst) { | |
566 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "BST buffer is NULL")); | |
567 | result = -ENODEV; | |
1da177e4 LT |
568 | goto end; |
569 | } | |
570 | ||
b6ce4083 VL |
571 | /* Battery Units */ |
572 | ||
573 | units = acpi_battery_power_units(battery); | |
574 | ||
1da177e4 LT |
575 | if (!(bst->state & 0x04)) |
576 | seq_printf(seq, "capacity state: ok\n"); | |
577 | else | |
578 | seq_printf(seq, "capacity state: critical\n"); | |
579 | ||
4be44fcd LB |
580 | if ((bst->state & 0x01) && (bst->state & 0x02)) { |
581 | seq_printf(seq, | |
582 | "charging state: charging/discharging\n"); | |
4be44fcd | 583 | } else if (bst->state & 0x01) |
1da177e4 LT |
584 | seq_printf(seq, "charging state: discharging\n"); |
585 | else if (bst->state & 0x02) | |
586 | seq_printf(seq, "charging state: charging\n"); | |
587 | else { | |
588 | seq_printf(seq, "charging state: charged\n"); | |
589 | } | |
590 | ||
591 | if (bst->present_rate == ACPI_BATTERY_VALUE_UNKNOWN) | |
592 | seq_printf(seq, "present rate: unknown\n"); | |
593 | else | |
594 | seq_printf(seq, "present rate: %d %s\n", | |
4be44fcd | 595 | (u32) bst->present_rate, units); |
1da177e4 LT |
596 | |
597 | if (bst->remaining_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
598 | seq_printf(seq, "remaining capacity: unknown\n"); | |
599 | else | |
600 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
4be44fcd | 601 | (u32) bst->remaining_capacity, units); |
1da177e4 LT |
602 | |
603 | if (bst->present_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
604 | seq_printf(seq, "present voltage: unknown\n"); | |
605 | else | |
606 | seq_printf(seq, "present voltage: %d mV\n", | |
4be44fcd | 607 | (u32) bst->present_voltage); |
1da177e4 | 608 | |
4be44fcd | 609 | end: |
1da177e4 | 610 | |
b6ce4083 VL |
611 | if (result) { |
612 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
613 | } | |
614 | ||
615 | return result; | |
616 | } | |
617 | ||
78490d82 | 618 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 619 | { |
50dd0969 | 620 | struct acpi_battery *battery = seq->private; |
4be44fcd | 621 | char *units = "?"; |
1da177e4 | 622 | |
b6ce4083 | 623 | if (result) |
1da177e4 LT |
624 | goto end; |
625 | ||
b6ce4083 | 626 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
627 | seq_printf(seq, "present: no\n"); |
628 | goto end; | |
629 | } | |
630 | ||
631 | /* Battery Units */ | |
4be44fcd | 632 | |
b6ce4083 | 633 | units = acpi_battery_power_units(battery); |
1da177e4 LT |
634 | |
635 | seq_printf(seq, "alarm: "); | |
636 | if (!battery->alarm) | |
637 | seq_printf(seq, "unsupported\n"); | |
638 | else | |
b6ce4083 | 639 | seq_printf(seq, "%lu %sh\n", battery->alarm, units); |
1da177e4 | 640 | |
4be44fcd | 641 | end: |
b6ce4083 VL |
642 | |
643 | if (result) | |
644 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
645 | ||
646 | return result; | |
647 | } | |
648 | ||
1da177e4 | 649 | static ssize_t |
4be44fcd LB |
650 | acpi_battery_write_alarm(struct file *file, |
651 | const char __user * buffer, | |
652 | size_t count, loff_t * ppos) | |
1da177e4 | 653 | { |
4be44fcd LB |
654 | int result = 0; |
655 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
656 | struct seq_file *m = file->private_data; |
657 | struct acpi_battery *battery = m->private; | |
b6ce4083 | 658 | int update_result = ACPI_BATTERY_NONE_UPDATE; |
1da177e4 | 659 | |
1da177e4 | 660 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 661 | return -EINVAL; |
1da177e4 | 662 | |
b6ce4083 VL |
663 | result = acpi_battery_update(battery, 1, &update_result); |
664 | if (result) { | |
665 | result = -ENODEV; | |
666 | goto end; | |
667 | } | |
1da177e4 | 668 | |
b6ce4083 VL |
669 | if (!acpi_battery_present(battery)) { |
670 | result = -ENODEV; | |
671 | goto end; | |
672 | } | |
673 | ||
674 | if (copy_from_user(alarm_string, buffer, count)) { | |
675 | result = -EFAULT; | |
676 | goto end; | |
677 | } | |
4be44fcd | 678 | |
1da177e4 LT |
679 | alarm_string[count] = '\0'; |
680 | ||
4be44fcd LB |
681 | result = acpi_battery_set_alarm(battery, |
682 | simple_strtoul(alarm_string, NULL, 0)); | |
1da177e4 | 683 | if (result) |
b6ce4083 VL |
684 | goto end; |
685 | ||
686 | end: | |
687 | ||
688 | acpi_battery_check_result(battery, result); | |
1da177e4 | 689 | |
b6ce4083 | 690 | if (!result) |
3bd92ba1 | 691 | return count; |
78490d82 AS |
692 | |
693 | return result; | |
694 | } | |
695 | ||
696 | typedef int(*print_func)(struct seq_file *seq, int result); | |
697 | typedef int(*get_func)(struct acpi_battery *battery); | |
698 | ||
699 | static struct acpi_read_mux { | |
700 | print_func print; | |
701 | get_func get; | |
702 | } acpi_read_funcs[ACPI_BATTERY_NUMFILES] = { | |
703 | {.get = acpi_battery_get_info, .print = acpi_battery_print_info}, | |
704 | {.get = acpi_battery_get_state, .print = acpi_battery_print_state}, | |
705 | {.get = acpi_battery_get_alarm, .print = acpi_battery_print_alarm}, | |
706 | }; | |
b6ce4083 | 707 | |
78490d82 AS |
708 | static int acpi_battery_read(int fid, struct seq_file *seq) |
709 | { | |
710 | struct acpi_battery *battery = seq->private; | |
711 | int result = 0; | |
712 | int update_result = ACPI_BATTERY_NONE_UPDATE; | |
713 | int update = 0; | |
714 | ||
78490d82 AS |
715 | update = (get_seconds() - battery->update_time[fid] >= update_time); |
716 | update = (update | battery->flags.update[fid]); | |
717 | ||
718 | result = acpi_battery_update(battery, update, &update_result); | |
719 | if (result) | |
720 | goto end; | |
721 | ||
722 | if (update_result == ACPI_BATTERY_EASY_UPDATE) { | |
723 | result = acpi_read_funcs[fid].get(battery); | |
724 | if (result) | |
725 | goto end; | |
726 | } | |
727 | ||
728 | end: | |
729 | result = acpi_read_funcs[fid].print(seq, result); | |
730 | acpi_battery_check_result(battery, result); | |
731 | battery->flags.update[fid] = result; | |
b6ce4083 | 732 | return result; |
1da177e4 LT |
733 | } |
734 | ||
78490d82 AS |
735 | static int acpi_battery_read_info(struct seq_file *seq, void *offset) |
736 | { | |
737 | return acpi_battery_read(ACPI_BATTERY_INFO, seq); | |
738 | } | |
739 | ||
740 | static int acpi_battery_read_state(struct seq_file *seq, void *offset) | |
741 | { | |
742 | return acpi_battery_read(ACPI_BATTERY_STATE, seq); | |
743 | } | |
744 | ||
745 | static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) | |
746 | { | |
747 | return acpi_battery_read(ACPI_BATTERY_ALARM, seq); | |
748 | } | |
749 | ||
750 | static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) | |
751 | { | |
752 | return single_open(file, acpi_battery_read_info, PDE(inode)->data); | |
753 | } | |
754 | ||
755 | static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) | |
756 | { | |
757 | return single_open(file, acpi_battery_read_state, PDE(inode)->data); | |
758 | } | |
759 | ||
1da177e4 LT |
760 | static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) |
761 | { | |
762 | return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); | |
763 | } | |
764 | ||
78490d82 AS |
765 | static struct battery_file { |
766 | struct file_operations ops; | |
767 | mode_t mode; | |
768 | char *name; | |
769 | } acpi_battery_file[] = { | |
770 | { | |
771 | .name = "info", | |
772 | .mode = S_IRUGO, | |
773 | .ops = { | |
4be44fcd LB |
774 | .open = acpi_battery_info_open_fs, |
775 | .read = seq_read, | |
776 | .llseek = seq_lseek, | |
777 | .release = single_release, | |
1da177e4 | 778 | .owner = THIS_MODULE, |
78490d82 AS |
779 | }, |
780 | }, | |
781 | { | |
782 | .name = "state", | |
783 | .mode = S_IRUGO, | |
784 | .ops = { | |
4be44fcd LB |
785 | .open = acpi_battery_state_open_fs, |
786 | .read = seq_read, | |
787 | .llseek = seq_lseek, | |
788 | .release = single_release, | |
1da177e4 | 789 | .owner = THIS_MODULE, |
78490d82 AS |
790 | }, |
791 | }, | |
792 | { | |
793 | .name = "alarm", | |
794 | .mode = S_IFREG | S_IRUGO | S_IWUSR, | |
795 | .ops = { | |
4be44fcd LB |
796 | .open = acpi_battery_alarm_open_fs, |
797 | .read = seq_read, | |
798 | .write = acpi_battery_write_alarm, | |
799 | .llseek = seq_lseek, | |
800 | .release = single_release, | |
1da177e4 | 801 | .owner = THIS_MODULE, |
78490d82 AS |
802 | }, |
803 | }, | |
1da177e4 LT |
804 | }; |
805 | ||
4be44fcd | 806 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 807 | { |
4be44fcd | 808 | struct proc_dir_entry *entry = NULL; |
78490d82 | 809 | int i; |
1da177e4 | 810 | |
1da177e4 LT |
811 | if (!acpi_device_dir(device)) { |
812 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 813 | acpi_battery_dir); |
1da177e4 | 814 | if (!acpi_device_dir(device)) |
d550d98d | 815 | return -ENODEV; |
1da177e4 LT |
816 | acpi_device_dir(device)->owner = THIS_MODULE; |
817 | } | |
818 | ||
78490d82 AS |
819 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
820 | entry = create_proc_entry(acpi_battery_file[i].name, | |
821 | acpi_battery_file[i].mode, acpi_device_dir(device)); | |
822 | if (!entry) | |
823 | return -ENODEV; | |
824 | else { | |
825 | entry->proc_fops = &acpi_battery_file[i].ops; | |
826 | entry->data = acpi_driver_data(device); | |
827 | entry->owner = THIS_MODULE; | |
828 | } | |
1da177e4 LT |
829 | } |
830 | ||
d550d98d | 831 | return 0; |
1da177e4 LT |
832 | } |
833 | ||
4be44fcd | 834 | static int acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 835 | { |
78490d82 | 836 | int i; |
1da177e4 | 837 | if (acpi_device_dir(device)) { |
78490d82 AS |
838 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
839 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 840 | acpi_device_dir(device)); |
78490d82 | 841 | } |
1da177e4 LT |
842 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
843 | acpi_device_dir(device) = NULL; | |
844 | } | |
845 | ||
d550d98d | 846 | return 0; |
1da177e4 LT |
847 | } |
848 | ||
1da177e4 LT |
849 | /* -------------------------------------------------------------------------- |
850 | Driver Interface | |
851 | -------------------------------------------------------------------------- */ | |
852 | ||
4be44fcd | 853 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 854 | { |
50dd0969 | 855 | struct acpi_battery *battery = data; |
4be44fcd | 856 | struct acpi_device *device = NULL; |
1da177e4 | 857 | |
1da177e4 | 858 | if (!battery) |
d550d98d | 859 | return; |
1da177e4 | 860 | |
145def84 | 861 | device = battery->device; |
1da177e4 LT |
862 | |
863 | switch (event) { | |
864 | case ACPI_BATTERY_NOTIFY_STATUS: | |
865 | case ACPI_BATTERY_NOTIFY_INFO: | |
9fdae727 VL |
866 | case ACPI_NOTIFY_BUS_CHECK: |
867 | case ACPI_NOTIFY_DEVICE_CHECK: | |
b6ce4083 VL |
868 | device = battery->device; |
869 | acpi_battery_notify_update(battery); | |
9ea7d575 VL |
870 | acpi_bus_generate_event(device, event, |
871 | acpi_battery_present(battery)); | |
962ce8ca ZR |
872 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
873 | device->dev.bus_id, event, | |
874 | acpi_battery_present(battery)); | |
1da177e4 LT |
875 | break; |
876 | default: | |
877 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 878 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
879 | break; |
880 | } | |
881 | ||
d550d98d | 882 | return; |
1da177e4 LT |
883 | } |
884 | ||
4be44fcd | 885 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 886 | { |
4be44fcd LB |
887 | int result = 0; |
888 | acpi_status status = 0; | |
889 | struct acpi_battery *battery = NULL; | |
1da177e4 | 890 | |
1da177e4 | 891 | if (!device) |
d550d98d | 892 | return -EINVAL; |
1da177e4 | 893 | |
36bcbec7 | 894 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 895 | if (!battery) |
d550d98d | 896 | return -ENOMEM; |
1da177e4 | 897 | |
3bd92ba1 | 898 | mutex_init(&battery->lock); |
145def84 | 899 | battery->device = device; |
1da177e4 LT |
900 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
901 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
902 | acpi_driver_data(device) = battery; | |
903 | ||
b6ce4083 | 904 | result = acpi_battery_get_status(battery); |
1da177e4 LT |
905 | if (result) |
906 | goto end; | |
907 | ||
78490d82 | 908 | battery->flags.init_update = 1; |
b6ce4083 | 909 | |
1da177e4 LT |
910 | result = acpi_battery_add_fs(device); |
911 | if (result) | |
912 | goto end; | |
913 | ||
3b073ec3 | 914 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 915 | ACPI_ALL_NOTIFY, |
4be44fcd | 916 | acpi_battery_notify, battery); |
1da177e4 | 917 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 918 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
919 | result = -ENODEV; |
920 | goto end; | |
921 | } | |
922 | ||
923 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", | |
4be44fcd LB |
924 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
925 | device->status.battery_present ? "present" : "absent"); | |
926 | ||
927 | end: | |
b6ce4083 | 928 | |
1da177e4 LT |
929 | if (result) { |
930 | acpi_battery_remove_fs(device); | |
931 | kfree(battery); | |
932 | } | |
933 | ||
b6ce4083 | 934 | |
d550d98d | 935 | return result; |
1da177e4 LT |
936 | } |
937 | ||
4be44fcd | 938 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 939 | { |
4be44fcd LB |
940 | acpi_status status = 0; |
941 | struct acpi_battery *battery = NULL; | |
1da177e4 | 942 | |
1da177e4 | 943 | if (!device || !acpi_driver_data(device)) |
d550d98d | 944 | return -EINVAL; |
1da177e4 | 945 | |
50dd0969 | 946 | battery = acpi_driver_data(device); |
1da177e4 | 947 | |
3b073ec3 | 948 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 949 | ACPI_ALL_NOTIFY, |
4be44fcd | 950 | acpi_battery_notify); |
1da177e4 LT |
951 | |
952 | acpi_battery_remove_fs(device); | |
953 | ||
78490d82 | 954 | kfree(battery->bif_data.pointer); |
b6ce4083 | 955 | |
78490d82 | 956 | kfree(battery->bst_data.pointer); |
b6ce4083 | 957 | |
3bd92ba1 | 958 | mutex_destroy(&battery->lock); |
b6ce4083 | 959 | |
1da177e4 LT |
960 | kfree(battery); |
961 | ||
d550d98d | 962 | return 0; |
1da177e4 LT |
963 | } |
964 | ||
34c4415a | 965 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 966 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
967 | { |
968 | struct acpi_battery *battery; | |
969 | ||
970 | if (!device) | |
971 | return -EINVAL; | |
972 | ||
973 | battery = device->driver_data; | |
b6ce4083 | 974 | |
78490d82 | 975 | battery->flags.init_update = 1; |
b6ce4083 VL |
976 | |
977 | return 0; | |
34c4415a JK |
978 | } |
979 | ||
4be44fcd | 980 | static int __init acpi_battery_init(void) |
1da177e4 | 981 | { |
3f86b832 | 982 | int result; |
1da177e4 | 983 | |
4d8316d5 PM |
984 | if (acpi_disabled) |
985 | return -ENODEV; | |
986 | ||
3f86b832 | 987 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 988 | if (!acpi_battery_dir) |
d550d98d | 989 | return -ENODEV; |
1da177e4 LT |
990 | |
991 | result = acpi_bus_register_driver(&acpi_battery_driver); | |
992 | if (result < 0) { | |
3f86b832 | 993 | acpi_unlock_battery_dir(acpi_battery_dir); |
d550d98d | 994 | return -ENODEV; |
1da177e4 LT |
995 | } |
996 | ||
d550d98d | 997 | return 0; |
1da177e4 LT |
998 | } |
999 | ||
4be44fcd | 1000 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1001 | { |
1da177e4 LT |
1002 | acpi_bus_unregister_driver(&acpi_battery_driver); |
1003 | ||
3f86b832 | 1004 | acpi_unlock_battery_dir(acpi_battery_dir); |
1da177e4 | 1005 | |
d550d98d | 1006 | return; |
1da177e4 LT |
1007 | } |
1008 | ||
1da177e4 LT |
1009 | module_init(acpi_battery_init); |
1010 | module_exit(acpi_battery_exit); |