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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 | ||
1da177e4 LT |
39 | #define ACPI_BATTERY_COMPONENT 0x00040000 |
40 | #define ACPI_BATTERY_CLASS "battery" | |
1da177e4 | 41 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
42 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
43 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
44 | #define ACPI_BATTERY_UNITS_WATTS "mW" | |
45 | #define ACPI_BATTERY_UNITS_AMPS "mA" | |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 VL |
48 | |
49 | #define ACPI_BATTERY_UPDATE_TIME 0 | |
50 | ||
51 | #define ACPI_BATTERY_NONE_UPDATE 0 | |
52 | #define ACPI_BATTERY_EASY_UPDATE 1 | |
53 | #define ACPI_BATTERY_INIT_UPDATE 2 | |
54 | ||
f52fd66d | 55 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 56 | |
f52fd66d | 57 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 58 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
59 | MODULE_LICENSE("GPL"); |
60 | ||
b6ce4083 VL |
61 | static unsigned int update_time = ACPI_BATTERY_UPDATE_TIME; |
62 | ||
63 | /* 0 - every time, > 0 - by update_time */ | |
64 | module_param(update_time, uint, 0644); | |
65 | ||
3f86b832 RT |
66 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
67 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
68 | ||
4be44fcd LB |
69 | static int acpi_battery_add(struct acpi_device *device); |
70 | static int acpi_battery_remove(struct acpi_device *device, int type); | |
5d9464a4 | 71 | static int acpi_battery_resume(struct acpi_device *device); |
1da177e4 | 72 | |
1ba90e3a TR |
73 | static const struct acpi_device_id battery_device_ids[] = { |
74 | {"PNP0C0A", 0}, | |
75 | {"", 0}, | |
76 | }; | |
77 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); | |
78 | ||
1da177e4 | 79 | static struct acpi_driver acpi_battery_driver = { |
c2b6705b | 80 | .name = "battery", |
4be44fcd | 81 | .class = ACPI_BATTERY_CLASS, |
1ba90e3a | 82 | .ids = battery_device_ids, |
4be44fcd LB |
83 | .ops = { |
84 | .add = acpi_battery_add, | |
34c4415a | 85 | .resume = acpi_battery_resume, |
4be44fcd LB |
86 | .remove = acpi_battery_remove, |
87 | }, | |
1da177e4 LT |
88 | }; |
89 | ||
038fdea2 | 90 | enum acpi_battery_files { |
78490d82 AS |
91 | ACPI_BATTERY_INFO = 0, |
92 | ACPI_BATTERY_STATE, | |
93 | ACPI_BATTERY_ALARM, | |
94 | ACPI_BATTERY_NUMFILES, | |
95 | }; | |
96 | ||
1da177e4 | 97 | struct acpi_battery { |
9ea7d575 | 98 | struct acpi_device *device; |
038fdea2 | 99 | struct mutex lock; |
4be44fcd | 100 | unsigned long alarm; |
78490d82 | 101 | unsigned long update_time[ACPI_BATTERY_NUMFILES]; |
038fdea2 AS |
102 | int state; |
103 | int present_rate; | |
104 | int remaining_capacity; | |
105 | int present_voltage; | |
106 | int power_unit; | |
107 | int design_capacity; | |
108 | int last_full_capacity; | |
109 | int technology; | |
110 | int design_voltage; | |
111 | int design_capacity_warning; | |
112 | int design_capacity_low; | |
113 | int capacity_granularity_1; | |
114 | int capacity_granularity_2; | |
115 | char model_number[32]; | |
116 | char serial_number[32]; | |
117 | char type[32]; | |
118 | char oem_info[32]; | |
119 | u8 present_prev; | |
120 | u8 alarm_present; | |
121 | u8 init_update; | |
122 | u8 update[ACPI_BATTERY_NUMFILES]; | |
1da177e4 LT |
123 | }; |
124 | ||
78490d82 | 125 | inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 126 | { |
78490d82 AS |
127 | return battery->device->status.battery_present; |
128 | } | |
038fdea2 | 129 | |
78490d82 AS |
130 | inline char *acpi_battery_power_units(struct acpi_battery *battery) |
131 | { | |
038fdea2 | 132 | if (battery->power_unit) |
78490d82 AS |
133 | return ACPI_BATTERY_UNITS_AMPS; |
134 | else | |
135 | return ACPI_BATTERY_UNITS_WATTS; | |
b6ce4083 VL |
136 | } |
137 | ||
78490d82 | 138 | inline acpi_handle acpi_battery_handle(struct acpi_battery *battery) |
b6ce4083 | 139 | { |
78490d82 | 140 | return battery->device->handle; |
b6ce4083 VL |
141 | } |
142 | ||
78490d82 AS |
143 | /* -------------------------------------------------------------------------- |
144 | Battery Management | |
145 | -------------------------------------------------------------------------- */ | |
146 | ||
b6ce4083 VL |
147 | static void acpi_battery_check_result(struct acpi_battery *battery, int result) |
148 | { | |
149 | if (!battery) | |
150 | return; | |
151 | ||
152 | if (result) { | |
038fdea2 | 153 | battery->init_update = 1; |
b6ce4083 VL |
154 | } |
155 | } | |
156 | ||
038fdea2 AS |
157 | struct acpi_offsets { |
158 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
159 | u8 mode; /* int or string? */ | |
160 | }; | |
b6ce4083 | 161 | |
038fdea2 AS |
162 | static struct acpi_offsets state_offsets[] = { |
163 | {offsetof(struct acpi_battery, state), 0}, | |
164 | {offsetof(struct acpi_battery, present_rate), 0}, | |
165 | {offsetof(struct acpi_battery, remaining_capacity), 0}, | |
166 | {offsetof(struct acpi_battery, present_voltage), 0}, | |
167 | }; | |
b6ce4083 | 168 | |
038fdea2 AS |
169 | static struct acpi_offsets info_offsets[] = { |
170 | {offsetof(struct acpi_battery, power_unit), 0}, | |
171 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
172 | {offsetof(struct acpi_battery, last_full_capacity), 0}, | |
173 | {offsetof(struct acpi_battery, technology), 0}, | |
174 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
175 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
176 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
177 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
178 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
179 | {offsetof(struct acpi_battery, model_number), 1}, | |
180 | {offsetof(struct acpi_battery, serial_number), 1}, | |
181 | {offsetof(struct acpi_battery, type), 1}, | |
182 | {offsetof(struct acpi_battery, oem_info), 1}, | |
183 | }; | |
b6ce4083 | 184 | |
038fdea2 AS |
185 | static int extract_package(struct acpi_battery *battery, |
186 | union acpi_object *package, | |
187 | struct acpi_offsets *offsets, int num) | |
188 | { | |
189 | int i, *x; | |
190 | union acpi_object *element; | |
191 | if (package->type != ACPI_TYPE_PACKAGE) | |
192 | return -EFAULT; | |
193 | for (i = 0; i < num; ++i) { | |
194 | if (package->package.count <= i) | |
195 | return -EFAULT; | |
196 | element = &package->package.elements[i]; | |
197 | if (offsets[i].mode) { | |
198 | if (element->type != ACPI_TYPE_STRING && | |
199 | element->type != ACPI_TYPE_BUFFER) | |
200 | return -EFAULT; | |
201 | strncpy((u8 *)battery + offsets[i].offset, | |
202 | element->string.pointer, 32); | |
203 | } else { | |
204 | if (element->type != ACPI_TYPE_INTEGER) | |
205 | return -EFAULT; | |
206 | x = (int *)((u8 *)battery + offsets[i].offset); | |
207 | *x = element->integer.value; | |
208 | } | |
b6ce4083 | 209 | } |
b6ce4083 VL |
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 }; | |
1da177e4 | 230 | |
78490d82 | 231 | battery->update_time[ACPI_BATTERY_INFO] = get_seconds(); |
b6ce4083 VL |
232 | if (!acpi_battery_present(battery)) |
233 | return 0; | |
038fdea2 AS |
234 | mutex_lock(&battery->lock); |
235 | status = acpi_evaluate_object(acpi_battery_handle(battery), "_BIF", | |
236 | NULL, &buffer); | |
237 | mutex_unlock(&battery->lock); | |
1da177e4 | 238 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 239 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 240 | return -ENODEV; |
1da177e4 | 241 | } |
038fdea2 AS |
242 | result = extract_package(battery, buffer.pointer, |
243 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 244 | kfree(buffer.pointer); |
d550d98d | 245 | return result; |
1da177e4 LT |
246 | } |
247 | ||
b6ce4083 | 248 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 249 | { |
4be44fcd LB |
250 | int result = 0; |
251 | acpi_status status = 0; | |
252 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 253 | |
78490d82 | 254 | battery->update_time[ACPI_BATTERY_STATE] = get_seconds(); |
1da177e4 | 255 | |
b6ce4083 VL |
256 | if (!acpi_battery_present(battery)) |
257 | return 0; | |
1da177e4 | 258 | |
038fdea2 AS |
259 | mutex_lock(&battery->lock); |
260 | status = acpi_evaluate_object(acpi_battery_handle(battery), "_BST", | |
261 | NULL, &buffer); | |
262 | mutex_unlock(&battery->lock); | |
5b31d895 | 263 | |
1da177e4 | 264 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 265 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 266 | return -ENODEV; |
1da177e4 | 267 | } |
038fdea2 AS |
268 | result = extract_package(battery, buffer.pointer, |
269 | state_offsets, ARRAY_SIZE(state_offsets)); | |
78490d82 | 270 | kfree(buffer.pointer); |
b6ce4083 VL |
271 | return result; |
272 | } | |
1da177e4 | 273 | |
b6ce4083 VL |
274 | static int acpi_battery_get_alarm(struct acpi_battery *battery) |
275 | { | |
78490d82 | 276 | battery->update_time[ACPI_BATTERY_ALARM] = get_seconds(); |
1da177e4 | 277 | |
b6ce4083 | 278 | return 0; |
1da177e4 LT |
279 | } |
280 | ||
9ea7d575 VL |
281 | static int acpi_battery_set_alarm(struct acpi_battery *battery, |
282 | unsigned long alarm) | |
1da177e4 | 283 | { |
4be44fcd LB |
284 | acpi_status status = 0; |
285 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
286 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
1da177e4 | 287 | |
78490d82 | 288 | battery->update_time[ACPI_BATTERY_ALARM] = get_seconds(); |
1da177e4 | 289 | |
b6ce4083 VL |
290 | if (!acpi_battery_present(battery)) |
291 | return -ENODEV; | |
1da177e4 | 292 | |
038fdea2 | 293 | if (!battery->alarm_present) |
d550d98d | 294 | return -ENODEV; |
1da177e4 LT |
295 | |
296 | arg0.integer.value = alarm; | |
297 | ||
038fdea2 AS |
298 | mutex_lock(&battery->lock); |
299 | status = acpi_evaluate_object(acpi_battery_handle(battery), "_BTP", | |
300 | &arg_list, NULL); | |
301 | mutex_unlock(&battery->lock); | |
1da177e4 | 302 | if (ACPI_FAILURE(status)) |
d550d98d | 303 | return -ENODEV; |
1da177e4 LT |
304 | |
305 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", (u32) alarm)); | |
306 | ||
307 | battery->alarm = alarm; | |
308 | ||
d550d98d | 309 | return 0; |
1da177e4 LT |
310 | } |
311 | ||
b6ce4083 | 312 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 313 | { |
4be44fcd LB |
314 | int result = 0; |
315 | acpi_status status = AE_OK; | |
316 | acpi_handle handle = NULL; | |
b6ce4083 | 317 | unsigned long alarm = battery->alarm; |
4be44fcd | 318 | |
b6ce4083 | 319 | /* See if alarms are supported, and if so, set default */ |
1da177e4 | 320 | |
b6ce4083 VL |
321 | status = acpi_get_handle(acpi_battery_handle(battery), "_BTP", &handle); |
322 | if (ACPI_SUCCESS(status)) { | |
038fdea2 AS |
323 | battery->alarm_present = 1; |
324 | if (!alarm) { | |
325 | alarm = battery->design_capacity_warning; | |
b6ce4083 VL |
326 | } |
327 | result = acpi_battery_set_alarm(battery, alarm); | |
328 | if (result) | |
329 | goto end; | |
330 | } else { | |
038fdea2 | 331 | battery->alarm_present = 0; |
b6ce4083 | 332 | } |
1da177e4 | 333 | |
b6ce4083 | 334 | end: |
1da177e4 | 335 | |
b6ce4083 VL |
336 | return result; |
337 | } | |
1da177e4 | 338 | |
b6ce4083 VL |
339 | static int acpi_battery_init_update(struct acpi_battery *battery) |
340 | { | |
341 | int result = 0; | |
1da177e4 | 342 | |
b6ce4083 VL |
343 | result = acpi_battery_get_status(battery); |
344 | if (result) | |
345 | return result; | |
1da177e4 | 346 | |
038fdea2 | 347 | battery->present_prev = acpi_battery_present(battery); |
1da177e4 | 348 | |
b6ce4083 VL |
349 | if (acpi_battery_present(battery)) { |
350 | result = acpi_battery_get_info(battery); | |
351 | if (result) | |
352 | return result; | |
353 | result = acpi_battery_get_state(battery); | |
1da177e4 | 354 | if (result) |
d550d98d | 355 | return result; |
1da177e4 | 356 | |
b6ce4083 VL |
357 | acpi_battery_init_alarm(battery); |
358 | } | |
359 | ||
360 | return result; | |
361 | } | |
362 | ||
363 | static int acpi_battery_update(struct acpi_battery *battery, | |
9ea7d575 | 364 | int update, int *update_result_ptr) |
b6ce4083 VL |
365 | { |
366 | int result = 0; | |
367 | int update_result = ACPI_BATTERY_NONE_UPDATE; | |
1da177e4 | 368 | |
b6ce4083 VL |
369 | if (!acpi_battery_present(battery)) { |
370 | update = 1; | |
371 | } | |
1da177e4 | 372 | |
038fdea2 | 373 | if (battery->init_update) { |
b6ce4083 VL |
374 | result = acpi_battery_init_update(battery); |
375 | if (result) | |
78490d82 | 376 | goto end; |
b6ce4083 VL |
377 | update_result = ACPI_BATTERY_INIT_UPDATE; |
378 | } else if (update) { | |
379 | result = acpi_battery_get_status(battery); | |
380 | if (result) | |
78490d82 | 381 | goto end; |
038fdea2 AS |
382 | if ((!battery->present_prev & acpi_battery_present(battery)) |
383 | || (battery->present_prev & !acpi_battery_present(battery))) { | |
b6ce4083 VL |
384 | result = acpi_battery_init_update(battery); |
385 | if (result) | |
78490d82 | 386 | goto end; |
b6ce4083 VL |
387 | update_result = ACPI_BATTERY_INIT_UPDATE; |
388 | } else { | |
389 | update_result = ACPI_BATTERY_EASY_UPDATE; | |
1da177e4 LT |
390 | } |
391 | } | |
392 | ||
b6ce4083 | 393 | end: |
1da177e4 | 394 | |
038fdea2 | 395 | battery->init_update = (result != 0); |
1da177e4 | 396 | |
b6ce4083 | 397 | *update_result_ptr = update_result; |
1da177e4 | 398 | |
d550d98d | 399 | return result; |
1da177e4 LT |
400 | } |
401 | ||
b6ce4083 | 402 | static void acpi_battery_notify_update(struct acpi_battery *battery) |
4bd35cdb | 403 | { |
b6ce4083 VL |
404 | acpi_battery_get_status(battery); |
405 | ||
038fdea2 | 406 | if (battery->init_update) { |
b6ce4083 VL |
407 | return; |
408 | } | |
409 | ||
038fdea2 | 410 | if ((!battery->present_prev & |
78490d82 | 411 | acpi_battery_present(battery)) || |
038fdea2 | 412 | (battery->present_prev & |
78490d82 | 413 | !acpi_battery_present(battery))) { |
038fdea2 | 414 | battery->init_update = 1; |
b6ce4083 | 415 | } else { |
038fdea2 AS |
416 | battery->update[ACPI_BATTERY_INFO] = 1; |
417 | battery->update[ACPI_BATTERY_STATE] = 1; | |
418 | battery->update[ACPI_BATTERY_ALARM] = 1; | |
4bd35cdb VL |
419 | } |
420 | } | |
421 | ||
1da177e4 LT |
422 | /* -------------------------------------------------------------------------- |
423 | FS Interface (/proc) | |
424 | -------------------------------------------------------------------------- */ | |
425 | ||
4be44fcd | 426 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 427 | |
78490d82 | 428 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 429 | { |
50dd0969 | 430 | struct acpi_battery *battery = seq->private; |
4be44fcd | 431 | char *units = "?"; |
1da177e4 | 432 | |
b6ce4083 | 433 | if (result) |
1da177e4 LT |
434 | goto end; |
435 | ||
b6ce4083 | 436 | if (acpi_battery_present(battery)) |
1da177e4 LT |
437 | seq_printf(seq, "present: yes\n"); |
438 | else { | |
439 | seq_printf(seq, "present: no\n"); | |
440 | goto end; | |
441 | } | |
442 | ||
b6ce4083 VL |
443 | /* Battery Units */ |
444 | ||
445 | units = acpi_battery_power_units(battery); | |
4be44fcd | 446 | |
038fdea2 | 447 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
448 | seq_printf(seq, "design capacity: unknown\n"); |
449 | else | |
450 | seq_printf(seq, "design capacity: %d %sh\n", | |
038fdea2 | 451 | (u32) battery->design_capacity, units); |
1da177e4 | 452 | |
038fdea2 | 453 | if (battery->last_full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
454 | seq_printf(seq, "last full capacity: unknown\n"); |
455 | else | |
456 | seq_printf(seq, "last full capacity: %d %sh\n", | |
038fdea2 | 457 | (u32) battery->last_full_capacity, units); |
1da177e4 | 458 | |
038fdea2 | 459 | switch ((u32) battery->technology) { |
1da177e4 LT |
460 | case 0: |
461 | seq_printf(seq, "battery technology: non-rechargeable\n"); | |
462 | break; | |
463 | case 1: | |
464 | seq_printf(seq, "battery technology: rechargeable\n"); | |
465 | break; | |
466 | default: | |
467 | seq_printf(seq, "battery technology: unknown\n"); | |
468 | break; | |
469 | } | |
470 | ||
038fdea2 | 471 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
472 | seq_printf(seq, "design voltage: unknown\n"); |
473 | else | |
474 | seq_printf(seq, "design voltage: %d mV\n", | |
038fdea2 | 475 | (u32) battery->design_voltage); |
1da177e4 | 476 | seq_printf(seq, "design capacity warning: %d %sh\n", |
038fdea2 | 477 | (u32) battery->design_capacity_warning, units); |
1da177e4 | 478 | seq_printf(seq, "design capacity low: %d %sh\n", |
038fdea2 | 479 | (u32) battery->design_capacity_low, units); |
1da177e4 | 480 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
038fdea2 | 481 | (u32) battery->capacity_granularity_1, units); |
1da177e4 | 482 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
038fdea2 AS |
483 | (u32) battery->capacity_granularity_2, units); |
484 | seq_printf(seq, "model number: %s\n", battery->model_number); | |
485 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
486 | seq_printf(seq, "battery type: %s\n", battery->type); | |
487 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd LB |
488 | |
489 | end: | |
1da177e4 | 490 | |
b6ce4083 VL |
491 | if (result) |
492 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
493 | ||
494 | return result; | |
495 | } | |
496 | ||
78490d82 | 497 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 498 | { |
50dd0969 | 499 | struct acpi_battery *battery = seq->private; |
4be44fcd | 500 | char *units = "?"; |
1da177e4 | 501 | |
b6ce4083 | 502 | if (result) |
1da177e4 LT |
503 | goto end; |
504 | ||
b6ce4083 | 505 | if (acpi_battery_present(battery)) |
1da177e4 LT |
506 | seq_printf(seq, "present: yes\n"); |
507 | else { | |
508 | seq_printf(seq, "present: no\n"); | |
509 | goto end; | |
510 | } | |
511 | ||
b6ce4083 VL |
512 | /* Battery Units */ |
513 | ||
514 | units = acpi_battery_power_units(battery); | |
515 | ||
038fdea2 | 516 | if (!(battery->state & 0x04)) |
1da177e4 LT |
517 | seq_printf(seq, "capacity state: ok\n"); |
518 | else | |
519 | seq_printf(seq, "capacity state: critical\n"); | |
520 | ||
038fdea2 | 521 | if ((battery->state & 0x01) && (battery->state & 0x02)) { |
4be44fcd LB |
522 | seq_printf(seq, |
523 | "charging state: charging/discharging\n"); | |
038fdea2 | 524 | } else if (battery->state & 0x01) |
1da177e4 | 525 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 526 | else if (battery->state & 0x02) |
1da177e4 LT |
527 | seq_printf(seq, "charging state: charging\n"); |
528 | else { | |
529 | seq_printf(seq, "charging state: charged\n"); | |
530 | } | |
531 | ||
038fdea2 | 532 | if (battery->present_rate == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
533 | seq_printf(seq, "present rate: unknown\n"); |
534 | else | |
535 | seq_printf(seq, "present rate: %d %s\n", | |
038fdea2 | 536 | (u32) battery->present_rate, units); |
1da177e4 | 537 | |
038fdea2 | 538 | if (battery->remaining_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
539 | seq_printf(seq, "remaining capacity: unknown\n"); |
540 | else | |
541 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
038fdea2 | 542 | (u32) battery->remaining_capacity, units); |
1da177e4 | 543 | |
038fdea2 | 544 | if (battery->present_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
545 | seq_printf(seq, "present voltage: unknown\n"); |
546 | else | |
547 | seq_printf(seq, "present voltage: %d mV\n", | |
038fdea2 | 548 | (u32) battery->present_voltage); |
1da177e4 | 549 | |
4be44fcd | 550 | end: |
1da177e4 | 551 | |
b6ce4083 VL |
552 | if (result) { |
553 | seq_printf(seq, "ERROR: Unable to read battery state\n"); | |
554 | } | |
555 | ||
556 | return result; | |
557 | } | |
558 | ||
78490d82 | 559 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 560 | { |
50dd0969 | 561 | struct acpi_battery *battery = seq->private; |
4be44fcd | 562 | char *units = "?"; |
1da177e4 | 563 | |
b6ce4083 | 564 | if (result) |
1da177e4 LT |
565 | goto end; |
566 | ||
b6ce4083 | 567 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
568 | seq_printf(seq, "present: no\n"); |
569 | goto end; | |
570 | } | |
571 | ||
572 | /* Battery Units */ | |
4be44fcd | 573 | |
b6ce4083 | 574 | units = acpi_battery_power_units(battery); |
1da177e4 LT |
575 | |
576 | seq_printf(seq, "alarm: "); | |
577 | if (!battery->alarm) | |
578 | seq_printf(seq, "unsupported\n"); | |
579 | else | |
b6ce4083 | 580 | seq_printf(seq, "%lu %sh\n", battery->alarm, units); |
1da177e4 | 581 | |
4be44fcd | 582 | end: |
b6ce4083 VL |
583 | |
584 | if (result) | |
585 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
586 | ||
587 | return result; | |
588 | } | |
589 | ||
1da177e4 | 590 | static ssize_t |
4be44fcd LB |
591 | acpi_battery_write_alarm(struct file *file, |
592 | const char __user * buffer, | |
593 | size_t count, loff_t * ppos) | |
1da177e4 | 594 | { |
4be44fcd LB |
595 | int result = 0; |
596 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
597 | struct seq_file *m = file->private_data; |
598 | struct acpi_battery *battery = m->private; | |
b6ce4083 | 599 | int update_result = ACPI_BATTERY_NONE_UPDATE; |
1da177e4 | 600 | |
1da177e4 | 601 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 602 | return -EINVAL; |
1da177e4 | 603 | |
b6ce4083 VL |
604 | result = acpi_battery_update(battery, 1, &update_result); |
605 | if (result) { | |
606 | result = -ENODEV; | |
607 | goto end; | |
608 | } | |
1da177e4 | 609 | |
b6ce4083 VL |
610 | if (!acpi_battery_present(battery)) { |
611 | result = -ENODEV; | |
612 | goto end; | |
613 | } | |
614 | ||
615 | if (copy_from_user(alarm_string, buffer, count)) { | |
616 | result = -EFAULT; | |
617 | goto end; | |
618 | } | |
4be44fcd | 619 | |
1da177e4 LT |
620 | alarm_string[count] = '\0'; |
621 | ||
4be44fcd LB |
622 | result = acpi_battery_set_alarm(battery, |
623 | simple_strtoul(alarm_string, NULL, 0)); | |
1da177e4 | 624 | if (result) |
b6ce4083 VL |
625 | goto end; |
626 | ||
627 | end: | |
628 | ||
629 | acpi_battery_check_result(battery, result); | |
1da177e4 | 630 | |
b6ce4083 | 631 | if (!result) |
5b31d895 | 632 | result = count; |
78490d82 AS |
633 | return result; |
634 | } | |
635 | ||
636 | typedef int(*print_func)(struct seq_file *seq, int result); | |
637 | typedef int(*get_func)(struct acpi_battery *battery); | |
638 | ||
639 | static struct acpi_read_mux { | |
640 | print_func print; | |
641 | get_func get; | |
642 | } acpi_read_funcs[ACPI_BATTERY_NUMFILES] = { | |
643 | {.get = acpi_battery_get_info, .print = acpi_battery_print_info}, | |
644 | {.get = acpi_battery_get_state, .print = acpi_battery_print_state}, | |
645 | {.get = acpi_battery_get_alarm, .print = acpi_battery_print_alarm}, | |
646 | }; | |
b6ce4083 | 647 | |
78490d82 AS |
648 | static int acpi_battery_read(int fid, struct seq_file *seq) |
649 | { | |
650 | struct acpi_battery *battery = seq->private; | |
651 | int result = 0; | |
652 | int update_result = ACPI_BATTERY_NONE_UPDATE; | |
653 | int update = 0; | |
654 | ||
78490d82 | 655 | update = (get_seconds() - battery->update_time[fid] >= update_time); |
038fdea2 | 656 | update = (update | battery->update[fid]); |
78490d82 AS |
657 | |
658 | result = acpi_battery_update(battery, update, &update_result); | |
659 | if (result) | |
660 | goto end; | |
661 | ||
662 | if (update_result == ACPI_BATTERY_EASY_UPDATE) { | |
663 | result = acpi_read_funcs[fid].get(battery); | |
664 | if (result) | |
665 | goto end; | |
666 | } | |
667 | ||
668 | end: | |
669 | result = acpi_read_funcs[fid].print(seq, result); | |
670 | acpi_battery_check_result(battery, result); | |
038fdea2 | 671 | battery->update[fid] = result; |
b6ce4083 | 672 | return result; |
1da177e4 LT |
673 | } |
674 | ||
78490d82 AS |
675 | static int acpi_battery_read_info(struct seq_file *seq, void *offset) |
676 | { | |
677 | return acpi_battery_read(ACPI_BATTERY_INFO, seq); | |
678 | } | |
679 | ||
680 | static int acpi_battery_read_state(struct seq_file *seq, void *offset) | |
681 | { | |
682 | return acpi_battery_read(ACPI_BATTERY_STATE, seq); | |
683 | } | |
684 | ||
685 | static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) | |
686 | { | |
687 | return acpi_battery_read(ACPI_BATTERY_ALARM, seq); | |
688 | } | |
689 | ||
690 | static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) | |
691 | { | |
692 | return single_open(file, acpi_battery_read_info, PDE(inode)->data); | |
693 | } | |
694 | ||
695 | static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) | |
696 | { | |
697 | return single_open(file, acpi_battery_read_state, PDE(inode)->data); | |
698 | } | |
699 | ||
1da177e4 LT |
700 | static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) |
701 | { | |
702 | return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); | |
703 | } | |
704 | ||
78490d82 AS |
705 | static struct battery_file { |
706 | struct file_operations ops; | |
707 | mode_t mode; | |
708 | char *name; | |
709 | } acpi_battery_file[] = { | |
710 | { | |
711 | .name = "info", | |
712 | .mode = S_IRUGO, | |
713 | .ops = { | |
4be44fcd LB |
714 | .open = acpi_battery_info_open_fs, |
715 | .read = seq_read, | |
716 | .llseek = seq_lseek, | |
717 | .release = single_release, | |
1da177e4 | 718 | .owner = THIS_MODULE, |
78490d82 AS |
719 | }, |
720 | }, | |
721 | { | |
722 | .name = "state", | |
723 | .mode = S_IRUGO, | |
724 | .ops = { | |
4be44fcd LB |
725 | .open = acpi_battery_state_open_fs, |
726 | .read = seq_read, | |
727 | .llseek = seq_lseek, | |
728 | .release = single_release, | |
1da177e4 | 729 | .owner = THIS_MODULE, |
78490d82 AS |
730 | }, |
731 | }, | |
732 | { | |
733 | .name = "alarm", | |
734 | .mode = S_IFREG | S_IRUGO | S_IWUSR, | |
735 | .ops = { | |
4be44fcd LB |
736 | .open = acpi_battery_alarm_open_fs, |
737 | .read = seq_read, | |
738 | .write = acpi_battery_write_alarm, | |
739 | .llseek = seq_lseek, | |
740 | .release = single_release, | |
1da177e4 | 741 | .owner = THIS_MODULE, |
78490d82 AS |
742 | }, |
743 | }, | |
1da177e4 LT |
744 | }; |
745 | ||
4be44fcd | 746 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 747 | { |
4be44fcd | 748 | struct proc_dir_entry *entry = NULL; |
78490d82 | 749 | int i; |
1da177e4 | 750 | |
1da177e4 LT |
751 | if (!acpi_device_dir(device)) { |
752 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 753 | acpi_battery_dir); |
1da177e4 | 754 | if (!acpi_device_dir(device)) |
d550d98d | 755 | return -ENODEV; |
1da177e4 LT |
756 | acpi_device_dir(device)->owner = THIS_MODULE; |
757 | } | |
758 | ||
78490d82 AS |
759 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
760 | entry = create_proc_entry(acpi_battery_file[i].name, | |
761 | acpi_battery_file[i].mode, acpi_device_dir(device)); | |
762 | if (!entry) | |
763 | return -ENODEV; | |
764 | else { | |
765 | entry->proc_fops = &acpi_battery_file[i].ops; | |
766 | entry->data = acpi_driver_data(device); | |
767 | entry->owner = THIS_MODULE; | |
768 | } | |
1da177e4 LT |
769 | } |
770 | ||
d550d98d | 771 | return 0; |
1da177e4 LT |
772 | } |
773 | ||
4be44fcd | 774 | static int acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 775 | { |
78490d82 | 776 | int i; |
1da177e4 | 777 | if (acpi_device_dir(device)) { |
78490d82 AS |
778 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
779 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 780 | acpi_device_dir(device)); |
78490d82 | 781 | } |
1da177e4 LT |
782 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
783 | acpi_device_dir(device) = NULL; | |
784 | } | |
785 | ||
d550d98d | 786 | return 0; |
1da177e4 LT |
787 | } |
788 | ||
1da177e4 LT |
789 | /* -------------------------------------------------------------------------- |
790 | Driver Interface | |
791 | -------------------------------------------------------------------------- */ | |
792 | ||
4be44fcd | 793 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 794 | { |
50dd0969 | 795 | struct acpi_battery *battery = data; |
4be44fcd | 796 | struct acpi_device *device = NULL; |
1da177e4 | 797 | |
1da177e4 | 798 | if (!battery) |
d550d98d | 799 | return; |
1da177e4 | 800 | |
145def84 | 801 | device = battery->device; |
1da177e4 LT |
802 | |
803 | switch (event) { | |
804 | case ACPI_BATTERY_NOTIFY_STATUS: | |
805 | case ACPI_BATTERY_NOTIFY_INFO: | |
9fdae727 VL |
806 | case ACPI_NOTIFY_BUS_CHECK: |
807 | case ACPI_NOTIFY_DEVICE_CHECK: | |
b6ce4083 VL |
808 | device = battery->device; |
809 | acpi_battery_notify_update(battery); | |
14e04fb3 | 810 | acpi_bus_generate_proc_event(device, event, |
9ea7d575 | 811 | acpi_battery_present(battery)); |
962ce8ca ZR |
812 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
813 | device->dev.bus_id, event, | |
814 | acpi_battery_present(battery)); | |
1da177e4 LT |
815 | break; |
816 | default: | |
817 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 818 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
819 | break; |
820 | } | |
821 | ||
d550d98d | 822 | return; |
1da177e4 LT |
823 | } |
824 | ||
4be44fcd | 825 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 826 | { |
4be44fcd LB |
827 | int result = 0; |
828 | acpi_status status = 0; | |
829 | struct acpi_battery *battery = NULL; | |
1da177e4 | 830 | |
1da177e4 | 831 | if (!device) |
d550d98d | 832 | return -EINVAL; |
1da177e4 | 833 | |
36bcbec7 | 834 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 835 | if (!battery) |
d550d98d | 836 | return -ENOMEM; |
1da177e4 | 837 | |
145def84 | 838 | battery->device = device; |
1da177e4 LT |
839 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
840 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
841 | acpi_driver_data(device) = battery; | |
038fdea2 | 842 | mutex_init(&battery->lock); |
b6ce4083 | 843 | result = acpi_battery_get_status(battery); |
1da177e4 LT |
844 | if (result) |
845 | goto end; | |
846 | ||
038fdea2 | 847 | battery->init_update = 1; |
b6ce4083 | 848 | |
1da177e4 LT |
849 | result = acpi_battery_add_fs(device); |
850 | if (result) | |
851 | goto end; | |
852 | ||
3b073ec3 | 853 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 854 | ACPI_ALL_NOTIFY, |
4be44fcd | 855 | acpi_battery_notify, battery); |
1da177e4 | 856 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 857 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
858 | result = -ENODEV; |
859 | goto end; | |
860 | } | |
861 | ||
862 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", | |
4be44fcd LB |
863 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
864 | device->status.battery_present ? "present" : "absent"); | |
865 | ||
866 | end: | |
b6ce4083 | 867 | |
1da177e4 LT |
868 | if (result) { |
869 | acpi_battery_remove_fs(device); | |
870 | kfree(battery); | |
871 | } | |
872 | ||
d550d98d | 873 | return result; |
1da177e4 LT |
874 | } |
875 | ||
4be44fcd | 876 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 877 | { |
4be44fcd LB |
878 | acpi_status status = 0; |
879 | struct acpi_battery *battery = NULL; | |
1da177e4 | 880 | |
1da177e4 | 881 | if (!device || !acpi_driver_data(device)) |
d550d98d | 882 | return -EINVAL; |
1da177e4 | 883 | |
50dd0969 | 884 | battery = acpi_driver_data(device); |
1da177e4 | 885 | |
3b073ec3 | 886 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 887 | ACPI_ALL_NOTIFY, |
4be44fcd | 888 | acpi_battery_notify); |
1da177e4 LT |
889 | |
890 | acpi_battery_remove_fs(device); | |
038fdea2 | 891 | mutex_destroy(&battery->lock); |
1da177e4 LT |
892 | kfree(battery); |
893 | ||
d550d98d | 894 | return 0; |
1da177e4 LT |
895 | } |
896 | ||
34c4415a | 897 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 898 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
899 | { |
900 | struct acpi_battery *battery; | |
901 | ||
902 | if (!device) | |
903 | return -EINVAL; | |
904 | ||
905 | battery = device->driver_data; | |
b6ce4083 | 906 | |
038fdea2 | 907 | battery->init_update = 1; |
b6ce4083 VL |
908 | |
909 | return 0; | |
34c4415a JK |
910 | } |
911 | ||
4be44fcd | 912 | static int __init acpi_battery_init(void) |
1da177e4 | 913 | { |
3f86b832 | 914 | int result; |
1da177e4 | 915 | |
4d8316d5 PM |
916 | if (acpi_disabled) |
917 | return -ENODEV; | |
918 | ||
3f86b832 | 919 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 920 | if (!acpi_battery_dir) |
d550d98d | 921 | return -ENODEV; |
1da177e4 LT |
922 | |
923 | result = acpi_bus_register_driver(&acpi_battery_driver); | |
924 | if (result < 0) { | |
3f86b832 | 925 | acpi_unlock_battery_dir(acpi_battery_dir); |
d550d98d | 926 | return -ENODEV; |
1da177e4 LT |
927 | } |
928 | ||
d550d98d | 929 | return 0; |
1da177e4 LT |
930 | } |
931 | ||
4be44fcd | 932 | static void __exit acpi_battery_exit(void) |
1da177e4 | 933 | { |
1da177e4 LT |
934 | acpi_bus_unregister_driver(&acpi_battery_driver); |
935 | ||
3f86b832 | 936 | acpi_unlock_battery_dir(acpi_battery_dir); |
1da177e4 | 937 | |
d550d98d | 938 | return; |
1da177e4 LT |
939 | } |
940 | ||
1da177e4 LT |
941 | module_init(acpi_battery_init); |
942 | module_exit(acpi_battery_exit); |