Root/
1 | /* |
2 | * battery.c - ACPI Battery Driver (Revision: 2.0) |
3 | * |
4 | * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
5 | * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> |
6 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
7 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
8 | * |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by |
13 | * the Free Software Foundation; either version 2 of the License, or (at |
14 | * your option) any later version. |
15 | * |
16 | * This program is distributed in the hope that it will be useful, but |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
19 | * General Public License for more details. |
20 | * |
21 | * You should have received a copy of the GNU General Public License along |
22 | * with this program; if not, write to the Free Software Foundation, Inc., |
23 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
24 | * |
25 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
26 | */ |
27 | |
28 | #include <linux/kernel.h> |
29 | #include <linux/module.h> |
30 | #include <linux/init.h> |
31 | #include <linux/types.h> |
32 | #include <linux/jiffies.h> |
33 | #include <linux/async.h> |
34 | #include <linux/dmi.h> |
35 | #include <linux/slab.h> |
36 | |
37 | #ifdef CONFIG_ACPI_PROCFS_POWER |
38 | #include <linux/proc_fs.h> |
39 | #include <linux/seq_file.h> |
40 | #include <asm/uaccess.h> |
41 | #endif |
42 | |
43 | #include <acpi/acpi_bus.h> |
44 | #include <acpi/acpi_drivers.h> |
45 | |
46 | #ifdef CONFIG_ACPI_SYSFS_POWER |
47 | #include <linux/power_supply.h> |
48 | #endif |
49 | |
50 | #define PREFIX "ACPI: " |
51 | |
52 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
53 | |
54 | #define ACPI_BATTERY_CLASS "battery" |
55 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
56 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
57 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 |
58 | #define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82 |
59 | |
60 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
61 | |
62 | ACPI_MODULE_NAME("battery"); |
63 | |
64 | MODULE_AUTHOR("Paul Diefenbaugh"); |
65 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
66 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
67 | MODULE_LICENSE("GPL"); |
68 | |
69 | static unsigned int cache_time = 1000; |
70 | module_param(cache_time, uint, 0644); |
71 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); |
72 | |
73 | #ifdef CONFIG_ACPI_PROCFS_POWER |
74 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
75 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); |
76 | |
77 | enum acpi_battery_files { |
78 | info_tag = 0, |
79 | state_tag, |
80 | alarm_tag, |
81 | ACPI_BATTERY_NUMFILES, |
82 | }; |
83 | |
84 | #endif |
85 | |
86 | static const struct acpi_device_id battery_device_ids[] = { |
87 | {"PNP0C0A", 0}, |
88 | {"", 0}, |
89 | }; |
90 | |
91 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
92 | |
93 | enum { |
94 | ACPI_BATTERY_ALARM_PRESENT, |
95 | ACPI_BATTERY_XINFO_PRESENT, |
96 | /* For buggy DSDTs that report negative 16-bit values for either |
97 | * charging or discharging current and/or report 0 as 65536 |
98 | * due to bad math. |
99 | */ |
100 | ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, |
101 | }; |
102 | |
103 | struct acpi_battery { |
104 | struct mutex lock; |
105 | #ifdef CONFIG_ACPI_SYSFS_POWER |
106 | struct power_supply bat; |
107 | #endif |
108 | struct acpi_device *device; |
109 | unsigned long update_time; |
110 | int rate_now; |
111 | int capacity_now; |
112 | int voltage_now; |
113 | int design_capacity; |
114 | int full_charge_capacity; |
115 | int technology; |
116 | int design_voltage; |
117 | int design_capacity_warning; |
118 | int design_capacity_low; |
119 | int cycle_count; |
120 | int measurement_accuracy; |
121 | int max_sampling_time; |
122 | int min_sampling_time; |
123 | int max_averaging_interval; |
124 | int min_averaging_interval; |
125 | int capacity_granularity_1; |
126 | int capacity_granularity_2; |
127 | int alarm; |
128 | char model_number[32]; |
129 | char serial_number[32]; |
130 | char type[32]; |
131 | char oem_info[32]; |
132 | int state; |
133 | int power_unit; |
134 | unsigned long flags; |
135 | }; |
136 | |
137 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); |
138 | |
139 | inline int acpi_battery_present(struct acpi_battery *battery) |
140 | { |
141 | return battery->device->status.battery_present; |
142 | } |
143 | |
144 | #ifdef CONFIG_ACPI_SYSFS_POWER |
145 | static int acpi_battery_technology(struct acpi_battery *battery) |
146 | { |
147 | if (!strcasecmp("NiCd", battery->type)) |
148 | return POWER_SUPPLY_TECHNOLOGY_NiCd; |
149 | if (!strcasecmp("NiMH", battery->type)) |
150 | return POWER_SUPPLY_TECHNOLOGY_NiMH; |
151 | if (!strcasecmp("LION", battery->type)) |
152 | return POWER_SUPPLY_TECHNOLOGY_LION; |
153 | if (!strncasecmp("LI-ION", battery->type, 6)) |
154 | return POWER_SUPPLY_TECHNOLOGY_LION; |
155 | if (!strcasecmp("LiP", battery->type)) |
156 | return POWER_SUPPLY_TECHNOLOGY_LIPO; |
157 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
158 | } |
159 | |
160 | static int acpi_battery_get_state(struct acpi_battery *battery); |
161 | |
162 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
163 | { |
164 | /* either charging or discharging */ |
165 | if (battery->state != 0) |
166 | return 0; |
167 | |
168 | /* battery not reporting charge */ |
169 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || |
170 | battery->capacity_now == 0) |
171 | return 0; |
172 | |
173 | /* good batteries update full_charge as the batteries degrade */ |
174 | if (battery->full_charge_capacity == battery->capacity_now) |
175 | return 1; |
176 | |
177 | /* fallback to using design values for broken batteries */ |
178 | if (battery->design_capacity == battery->capacity_now) |
179 | return 1; |
180 | |
181 | /* we don't do any sort of metric based on percentages */ |
182 | return 0; |
183 | } |
184 | |
185 | static int acpi_battery_get_property(struct power_supply *psy, |
186 | enum power_supply_property psp, |
187 | union power_supply_propval *val) |
188 | { |
189 | struct acpi_battery *battery = to_acpi_battery(psy); |
190 | |
191 | if (acpi_battery_present(battery)) { |
192 | /* run battery update only if it is present */ |
193 | acpi_battery_get_state(battery); |
194 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) |
195 | return -ENODEV; |
196 | switch (psp) { |
197 | case POWER_SUPPLY_PROP_STATUS: |
198 | if (battery->state & 0x01) |
199 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
200 | else if (battery->state & 0x02) |
201 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
202 | else if (acpi_battery_is_charged(battery)) |
203 | val->intval = POWER_SUPPLY_STATUS_FULL; |
204 | else |
205 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
206 | break; |
207 | case POWER_SUPPLY_PROP_PRESENT: |
208 | val->intval = acpi_battery_present(battery); |
209 | break; |
210 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
211 | val->intval = acpi_battery_technology(battery); |
212 | break; |
213 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
214 | val->intval = battery->cycle_count; |
215 | break; |
216 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
217 | val->intval = battery->design_voltage * 1000; |
218 | break; |
219 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
220 | val->intval = battery->voltage_now * 1000; |
221 | break; |
222 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
223 | case POWER_SUPPLY_PROP_POWER_NOW: |
224 | val->intval = battery->rate_now * 1000; |
225 | break; |
226 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
227 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
228 | val->intval = battery->design_capacity * 1000; |
229 | break; |
230 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
231 | case POWER_SUPPLY_PROP_ENERGY_FULL: |
232 | val->intval = battery->full_charge_capacity * 1000; |
233 | break; |
234 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
235 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
236 | val->intval = battery->capacity_now * 1000; |
237 | break; |
238 | case POWER_SUPPLY_PROP_MODEL_NAME: |
239 | val->strval = battery->model_number; |
240 | break; |
241 | case POWER_SUPPLY_PROP_MANUFACTURER: |
242 | val->strval = battery->oem_info; |
243 | break; |
244 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
245 | val->strval = battery->serial_number; |
246 | break; |
247 | default: |
248 | return -EINVAL; |
249 | } |
250 | return 0; |
251 | } |
252 | |
253 | static enum power_supply_property charge_battery_props[] = { |
254 | POWER_SUPPLY_PROP_STATUS, |
255 | POWER_SUPPLY_PROP_PRESENT, |
256 | POWER_SUPPLY_PROP_TECHNOLOGY, |
257 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
258 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
259 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
260 | POWER_SUPPLY_PROP_CURRENT_NOW, |
261 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
262 | POWER_SUPPLY_PROP_CHARGE_FULL, |
263 | POWER_SUPPLY_PROP_CHARGE_NOW, |
264 | POWER_SUPPLY_PROP_MODEL_NAME, |
265 | POWER_SUPPLY_PROP_MANUFACTURER, |
266 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
267 | }; |
268 | |
269 | static enum power_supply_property energy_battery_props[] = { |
270 | POWER_SUPPLY_PROP_STATUS, |
271 | POWER_SUPPLY_PROP_PRESENT, |
272 | POWER_SUPPLY_PROP_TECHNOLOGY, |
273 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
274 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
275 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
276 | POWER_SUPPLY_PROP_CURRENT_NOW, |
277 | POWER_SUPPLY_PROP_POWER_NOW, |
278 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
279 | POWER_SUPPLY_PROP_ENERGY_FULL, |
280 | POWER_SUPPLY_PROP_ENERGY_NOW, |
281 | POWER_SUPPLY_PROP_MODEL_NAME, |
282 | POWER_SUPPLY_PROP_MANUFACTURER, |
283 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
284 | }; |
285 | #endif |
286 | |
287 | #ifdef CONFIG_ACPI_PROCFS_POWER |
288 | inline char *acpi_battery_units(struct acpi_battery *battery) |
289 | { |
290 | return (battery->power_unit)?"mA":"mW"; |
291 | } |
292 | #endif |
293 | |
294 | /* -------------------------------------------------------------------------- |
295 | Battery Management |
296 | -------------------------------------------------------------------------- */ |
297 | struct acpi_offsets { |
298 | size_t offset; /* offset inside struct acpi_sbs_battery */ |
299 | u8 mode; /* int or string? */ |
300 | }; |
301 | |
302 | static struct acpi_offsets state_offsets[] = { |
303 | {offsetof(struct acpi_battery, state), 0}, |
304 | {offsetof(struct acpi_battery, rate_now), 0}, |
305 | {offsetof(struct acpi_battery, capacity_now), 0}, |
306 | {offsetof(struct acpi_battery, voltage_now), 0}, |
307 | }; |
308 | |
309 | static struct acpi_offsets info_offsets[] = { |
310 | {offsetof(struct acpi_battery, power_unit), 0}, |
311 | {offsetof(struct acpi_battery, design_capacity), 0}, |
312 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
313 | {offsetof(struct acpi_battery, technology), 0}, |
314 | {offsetof(struct acpi_battery, design_voltage), 0}, |
315 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, |
316 | {offsetof(struct acpi_battery, design_capacity_low), 0}, |
317 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
318 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
319 | {offsetof(struct acpi_battery, model_number), 1}, |
320 | {offsetof(struct acpi_battery, serial_number), 1}, |
321 | {offsetof(struct acpi_battery, type), 1}, |
322 | {offsetof(struct acpi_battery, oem_info), 1}, |
323 | }; |
324 | |
325 | static struct acpi_offsets extended_info_offsets[] = { |
326 | {offsetof(struct acpi_battery, power_unit), 0}, |
327 | {offsetof(struct acpi_battery, design_capacity), 0}, |
328 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
329 | {offsetof(struct acpi_battery, technology), 0}, |
330 | {offsetof(struct acpi_battery, design_voltage), 0}, |
331 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, |
332 | {offsetof(struct acpi_battery, design_capacity_low), 0}, |
333 | {offsetof(struct acpi_battery, cycle_count), 0}, |
334 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, |
335 | {offsetof(struct acpi_battery, max_sampling_time), 0}, |
336 | {offsetof(struct acpi_battery, min_sampling_time), 0}, |
337 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, |
338 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, |
339 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
340 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
341 | {offsetof(struct acpi_battery, model_number), 1}, |
342 | {offsetof(struct acpi_battery, serial_number), 1}, |
343 | {offsetof(struct acpi_battery, type), 1}, |
344 | {offsetof(struct acpi_battery, oem_info), 1}, |
345 | }; |
346 | |
347 | static int extract_package(struct acpi_battery *battery, |
348 | union acpi_object *package, |
349 | struct acpi_offsets *offsets, int num) |
350 | { |
351 | int i; |
352 | union acpi_object *element; |
353 | if (package->type != ACPI_TYPE_PACKAGE) |
354 | return -EFAULT; |
355 | for (i = 0; i < num; ++i) { |
356 | if (package->package.count <= i) |
357 | return -EFAULT; |
358 | element = &package->package.elements[i]; |
359 | if (offsets[i].mode) { |
360 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
361 | if (element->type == ACPI_TYPE_STRING || |
362 | element->type == ACPI_TYPE_BUFFER) |
363 | strncpy(ptr, element->string.pointer, 32); |
364 | else if (element->type == ACPI_TYPE_INTEGER) { |
365 | strncpy(ptr, (u8 *)&element->integer.value, |
366 | sizeof(u64)); |
367 | ptr[sizeof(u64)] = 0; |
368 | } else |
369 | *ptr = 0; /* don't have value */ |
370 | } else { |
371 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
372 | *x = (element->type == ACPI_TYPE_INTEGER) ? |
373 | element->integer.value : -1; |
374 | } |
375 | } |
376 | return 0; |
377 | } |
378 | |
379 | static int acpi_battery_get_status(struct acpi_battery *battery) |
380 | { |
381 | if (acpi_bus_get_status(battery->device)) { |
382 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
383 | return -ENODEV; |
384 | } |
385 | return 0; |
386 | } |
387 | |
388 | static int acpi_battery_get_info(struct acpi_battery *battery) |
389 | { |
390 | int result = -EFAULT; |
391 | acpi_status status = 0; |
392 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)? |
393 | "_BIX" : "_BIF"; |
394 | |
395 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
396 | |
397 | if (!acpi_battery_present(battery)) |
398 | return 0; |
399 | mutex_lock(&battery->lock); |
400 | status = acpi_evaluate_object(battery->device->handle, name, |
401 | NULL, &buffer); |
402 | mutex_unlock(&battery->lock); |
403 | |
404 | if (ACPI_FAILURE(status)) { |
405 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
406 | return -ENODEV; |
407 | } |
408 | if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) |
409 | result = extract_package(battery, buffer.pointer, |
410 | extended_info_offsets, |
411 | ARRAY_SIZE(extended_info_offsets)); |
412 | else |
413 | result = extract_package(battery, buffer.pointer, |
414 | info_offsets, ARRAY_SIZE(info_offsets)); |
415 | kfree(buffer.pointer); |
416 | return result; |
417 | } |
418 | |
419 | static int acpi_battery_get_state(struct acpi_battery *battery) |
420 | { |
421 | int result = 0; |
422 | acpi_status status = 0; |
423 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
424 | |
425 | if (!acpi_battery_present(battery)) |
426 | return 0; |
427 | |
428 | if (battery->update_time && |
429 | time_before(jiffies, battery->update_time + |
430 | msecs_to_jiffies(cache_time))) |
431 | return 0; |
432 | |
433 | mutex_lock(&battery->lock); |
434 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
435 | NULL, &buffer); |
436 | mutex_unlock(&battery->lock); |
437 | |
438 | if (ACPI_FAILURE(status)) { |
439 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
440 | return -ENODEV; |
441 | } |
442 | |
443 | result = extract_package(battery, buffer.pointer, |
444 | state_offsets, ARRAY_SIZE(state_offsets)); |
445 | battery->update_time = jiffies; |
446 | kfree(buffer.pointer); |
447 | |
448 | if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) && |
449 | battery->rate_now != -1) |
450 | battery->rate_now = abs((s16)battery->rate_now); |
451 | |
452 | return result; |
453 | } |
454 | |
455 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
456 | { |
457 | acpi_status status = 0; |
458 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
459 | struct acpi_object_list arg_list = { 1, &arg0 }; |
460 | |
461 | if (!acpi_battery_present(battery) || |
462 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
463 | return -ENODEV; |
464 | |
465 | arg0.integer.value = battery->alarm; |
466 | |
467 | mutex_lock(&battery->lock); |
468 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
469 | &arg_list, NULL); |
470 | mutex_unlock(&battery->lock); |
471 | |
472 | if (ACPI_FAILURE(status)) |
473 | return -ENODEV; |
474 | |
475 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
476 | return 0; |
477 | } |
478 | |
479 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
480 | { |
481 | acpi_status status = AE_OK; |
482 | acpi_handle handle = NULL; |
483 | |
484 | /* See if alarms are supported, and if so, set default */ |
485 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
486 | if (ACPI_FAILURE(status)) { |
487 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
488 | return 0; |
489 | } |
490 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
491 | if (!battery->alarm) |
492 | battery->alarm = battery->design_capacity_warning; |
493 | return acpi_battery_set_alarm(battery); |
494 | } |
495 | |
496 | #ifdef CONFIG_ACPI_SYSFS_POWER |
497 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
498 | struct device_attribute *attr, |
499 | char *buf) |
500 | { |
501 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
502 | return sprintf(buf, "%d\n", battery->alarm * 1000); |
503 | } |
504 | |
505 | static ssize_t acpi_battery_alarm_store(struct device *dev, |
506 | struct device_attribute *attr, |
507 | const char *buf, size_t count) |
508 | { |
509 | unsigned long x; |
510 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
511 | if (sscanf(buf, "%ld\n", &x) == 1) |
512 | battery->alarm = x/1000; |
513 | if (acpi_battery_present(battery)) |
514 | acpi_battery_set_alarm(battery); |
515 | return count; |
516 | } |
517 | |
518 | static struct device_attribute alarm_attr = { |
519 | .attr = {.name = "alarm", .mode = 0644}, |
520 | .show = acpi_battery_alarm_show, |
521 | .store = acpi_battery_alarm_store, |
522 | }; |
523 | |
524 | static int sysfs_add_battery(struct acpi_battery *battery) |
525 | { |
526 | int result; |
527 | |
528 | if (battery->power_unit) { |
529 | battery->bat.properties = charge_battery_props; |
530 | battery->bat.num_properties = |
531 | ARRAY_SIZE(charge_battery_props); |
532 | } else { |
533 | battery->bat.properties = energy_battery_props; |
534 | battery->bat.num_properties = |
535 | ARRAY_SIZE(energy_battery_props); |
536 | } |
537 | |
538 | battery->bat.name = acpi_device_bid(battery->device); |
539 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; |
540 | battery->bat.get_property = acpi_battery_get_property; |
541 | |
542 | result = power_supply_register(&battery->device->dev, &battery->bat); |
543 | if (result) |
544 | return result; |
545 | return device_create_file(battery->bat.dev, &alarm_attr); |
546 | } |
547 | |
548 | static void sysfs_remove_battery(struct acpi_battery *battery) |
549 | { |
550 | if (!battery->bat.dev) |
551 | return; |
552 | device_remove_file(battery->bat.dev, &alarm_attr); |
553 | power_supply_unregister(&battery->bat); |
554 | battery->bat.dev = NULL; |
555 | } |
556 | #endif |
557 | |
558 | static void acpi_battery_quirks(struct acpi_battery *battery) |
559 | { |
560 | if (dmi_name_in_vendors("Acer") && battery->power_unit) { |
561 | set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags); |
562 | } |
563 | } |
564 | |
565 | static int acpi_battery_update(struct acpi_battery *battery) |
566 | { |
567 | int result, old_present = acpi_battery_present(battery); |
568 | result = acpi_battery_get_status(battery); |
569 | if (result) |
570 | return result; |
571 | if (!acpi_battery_present(battery)) { |
572 | #ifdef CONFIG_ACPI_SYSFS_POWER |
573 | sysfs_remove_battery(battery); |
574 | #endif |
575 | battery->update_time = 0; |
576 | return 0; |
577 | } |
578 | if (!battery->update_time || |
579 | old_present != acpi_battery_present(battery)) { |
580 | result = acpi_battery_get_info(battery); |
581 | if (result) |
582 | return result; |
583 | acpi_battery_quirks(battery); |
584 | acpi_battery_init_alarm(battery); |
585 | } |
586 | #ifdef CONFIG_ACPI_SYSFS_POWER |
587 | if (!battery->bat.dev) |
588 | sysfs_add_battery(battery); |
589 | #endif |
590 | return acpi_battery_get_state(battery); |
591 | } |
592 | |
593 | /* -------------------------------------------------------------------------- |
594 | FS Interface (/proc) |
595 | -------------------------------------------------------------------------- */ |
596 | |
597 | #ifdef CONFIG_ACPI_PROCFS_POWER |
598 | static struct proc_dir_entry *acpi_battery_dir; |
599 | |
600 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
601 | { |
602 | struct acpi_battery *battery = seq->private; |
603 | |
604 | if (result) |
605 | goto end; |
606 | |
607 | seq_printf(seq, "present: %s\n", |
608 | acpi_battery_present(battery)?"yes":"no"); |
609 | if (!acpi_battery_present(battery)) |
610 | goto end; |
611 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
612 | seq_printf(seq, "design capacity: unknown\n"); |
613 | else |
614 | seq_printf(seq, "design capacity: %d %sh\n", |
615 | battery->design_capacity, |
616 | acpi_battery_units(battery)); |
617 | |
618 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
619 | seq_printf(seq, "last full capacity: unknown\n"); |
620 | else |
621 | seq_printf(seq, "last full capacity: %d %sh\n", |
622 | battery->full_charge_capacity, |
623 | acpi_battery_units(battery)); |
624 | |
625 | seq_printf(seq, "battery technology: %srechargeable\n", |
626 | (!battery->technology)?"non-":""); |
627 | |
628 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
629 | seq_printf(seq, "design voltage: unknown\n"); |
630 | else |
631 | seq_printf(seq, "design voltage: %d mV\n", |
632 | battery->design_voltage); |
633 | seq_printf(seq, "design capacity warning: %d %sh\n", |
634 | battery->design_capacity_warning, |
635 | acpi_battery_units(battery)); |
636 | seq_printf(seq, "design capacity low: %d %sh\n", |
637 | battery->design_capacity_low, |
638 | acpi_battery_units(battery)); |
639 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); |
640 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
641 | battery->capacity_granularity_1, |
642 | acpi_battery_units(battery)); |
643 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
644 | battery->capacity_granularity_2, |
645 | acpi_battery_units(battery)); |
646 | seq_printf(seq, "model number: %s\n", battery->model_number); |
647 | seq_printf(seq, "serial number: %s\n", battery->serial_number); |
648 | seq_printf(seq, "battery type: %s\n", battery->type); |
649 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); |
650 | end: |
651 | if (result) |
652 | seq_printf(seq, "ERROR: Unable to read battery info\n"); |
653 | return result; |
654 | } |
655 | |
656 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
657 | { |
658 | struct acpi_battery *battery = seq->private; |
659 | |
660 | if (result) |
661 | goto end; |
662 | |
663 | seq_printf(seq, "present: %s\n", |
664 | acpi_battery_present(battery)?"yes":"no"); |
665 | if (!acpi_battery_present(battery)) |
666 | goto end; |
667 | |
668 | seq_printf(seq, "capacity state: %s\n", |
669 | (battery->state & 0x04)?"critical":"ok"); |
670 | if ((battery->state & 0x01) && (battery->state & 0x02)) |
671 | seq_printf(seq, |
672 | "charging state: charging/discharging\n"); |
673 | else if (battery->state & 0x01) |
674 | seq_printf(seq, "charging state: discharging\n"); |
675 | else if (battery->state & 0x02) |
676 | seq_printf(seq, "charging state: charging\n"); |
677 | else |
678 | seq_printf(seq, "charging state: charged\n"); |
679 | |
680 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
681 | seq_printf(seq, "present rate: unknown\n"); |
682 | else |
683 | seq_printf(seq, "present rate: %d %s\n", |
684 | battery->rate_now, acpi_battery_units(battery)); |
685 | |
686 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
687 | seq_printf(seq, "remaining capacity: unknown\n"); |
688 | else |
689 | seq_printf(seq, "remaining capacity: %d %sh\n", |
690 | battery->capacity_now, acpi_battery_units(battery)); |
691 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
692 | seq_printf(seq, "present voltage: unknown\n"); |
693 | else |
694 | seq_printf(seq, "present voltage: %d mV\n", |
695 | battery->voltage_now); |
696 | end: |
697 | if (result) |
698 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
699 | |
700 | return result; |
701 | } |
702 | |
703 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
704 | { |
705 | struct acpi_battery *battery = seq->private; |
706 | |
707 | if (result) |
708 | goto end; |
709 | |
710 | if (!acpi_battery_present(battery)) { |
711 | seq_printf(seq, "present: no\n"); |
712 | goto end; |
713 | } |
714 | seq_printf(seq, "alarm: "); |
715 | if (!battery->alarm) |
716 | seq_printf(seq, "unsupported\n"); |
717 | else |
718 | seq_printf(seq, "%u %sh\n", battery->alarm, |
719 | acpi_battery_units(battery)); |
720 | end: |
721 | if (result) |
722 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); |
723 | return result; |
724 | } |
725 | |
726 | static ssize_t acpi_battery_write_alarm(struct file *file, |
727 | const char __user * buffer, |
728 | size_t count, loff_t * ppos) |
729 | { |
730 | int result = 0; |
731 | char alarm_string[12] = { '\0' }; |
732 | struct seq_file *m = file->private_data; |
733 | struct acpi_battery *battery = m->private; |
734 | |
735 | if (!battery || (count > sizeof(alarm_string) - 1)) |
736 | return -EINVAL; |
737 | if (!acpi_battery_present(battery)) { |
738 | result = -ENODEV; |
739 | goto end; |
740 | } |
741 | if (copy_from_user(alarm_string, buffer, count)) { |
742 | result = -EFAULT; |
743 | goto end; |
744 | } |
745 | alarm_string[count] = '\0'; |
746 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
747 | result = acpi_battery_set_alarm(battery); |
748 | end: |
749 | if (!result) |
750 | return count; |
751 | return result; |
752 | } |
753 | |
754 | typedef int(*print_func)(struct seq_file *seq, int result); |
755 | |
756 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { |
757 | acpi_battery_print_info, |
758 | acpi_battery_print_state, |
759 | acpi_battery_print_alarm, |
760 | }; |
761 | |
762 | static int acpi_battery_read(int fid, struct seq_file *seq) |
763 | { |
764 | struct acpi_battery *battery = seq->private; |
765 | int result = acpi_battery_update(battery); |
766 | return acpi_print_funcs[fid](seq, result); |
767 | } |
768 | |
769 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
770 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ |
771 | { \ |
772 | return acpi_battery_read(_name##_tag, seq); \ |
773 | } \ |
774 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ |
775 | { \ |
776 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ |
777 | } |
778 | |
779 | DECLARE_FILE_FUNCTIONS(info); |
780 | DECLARE_FILE_FUNCTIONS(state); |
781 | DECLARE_FILE_FUNCTIONS(alarm); |
782 | |
783 | #undef DECLARE_FILE_FUNCTIONS |
784 | |
785 | #define FILE_DESCRIPTION_RO(_name) \ |
786 | { \ |
787 | .name = __stringify(_name), \ |
788 | .mode = S_IRUGO, \ |
789 | .ops = { \ |
790 | .open = acpi_battery_##_name##_open_fs, \ |
791 | .read = seq_read, \ |
792 | .llseek = seq_lseek, \ |
793 | .release = single_release, \ |
794 | .owner = THIS_MODULE, \ |
795 | }, \ |
796 | } |
797 | |
798 | #define FILE_DESCRIPTION_RW(_name) \ |
799 | { \ |
800 | .name = __stringify(_name), \ |
801 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ |
802 | .ops = { \ |
803 | .open = acpi_battery_##_name##_open_fs, \ |
804 | .read = seq_read, \ |
805 | .llseek = seq_lseek, \ |
806 | .write = acpi_battery_write_##_name, \ |
807 | .release = single_release, \ |
808 | .owner = THIS_MODULE, \ |
809 | }, \ |
810 | } |
811 | |
812 | static struct battery_file { |
813 | struct file_operations ops; |
814 | mode_t mode; |
815 | const char *name; |
816 | } acpi_battery_file[] = { |
817 | FILE_DESCRIPTION_RO(info), |
818 | FILE_DESCRIPTION_RO(state), |
819 | FILE_DESCRIPTION_RW(alarm), |
820 | }; |
821 | |
822 | #undef FILE_DESCRIPTION_RO |
823 | #undef FILE_DESCRIPTION_RW |
824 | |
825 | static int acpi_battery_add_fs(struct acpi_device *device) |
826 | { |
827 | struct proc_dir_entry *entry = NULL; |
828 | int i; |
829 | |
830 | if (!acpi_device_dir(device)) { |
831 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
832 | acpi_battery_dir); |
833 | if (!acpi_device_dir(device)) |
834 | return -ENODEV; |
835 | } |
836 | |
837 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
838 | entry = proc_create_data(acpi_battery_file[i].name, |
839 | acpi_battery_file[i].mode, |
840 | acpi_device_dir(device), |
841 | &acpi_battery_file[i].ops, |
842 | acpi_driver_data(device)); |
843 | if (!entry) |
844 | return -ENODEV; |
845 | } |
846 | return 0; |
847 | } |
848 | |
849 | static void acpi_battery_remove_fs(struct acpi_device *device) |
850 | { |
851 | int i; |
852 | if (!acpi_device_dir(device)) |
853 | return; |
854 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) |
855 | remove_proc_entry(acpi_battery_file[i].name, |
856 | acpi_device_dir(device)); |
857 | |
858 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
859 | acpi_device_dir(device) = NULL; |
860 | } |
861 | |
862 | #endif |
863 | |
864 | /* -------------------------------------------------------------------------- |
865 | Driver Interface |
866 | -------------------------------------------------------------------------- */ |
867 | |
868 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
869 | { |
870 | struct acpi_battery *battery = acpi_driver_data(device); |
871 | |
872 | if (!battery) |
873 | return; |
874 | acpi_battery_update(battery); |
875 | acpi_bus_generate_proc_event(device, event, |
876 | acpi_battery_present(battery)); |
877 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
878 | dev_name(&device->dev), event, |
879 | acpi_battery_present(battery)); |
880 | #ifdef CONFIG_ACPI_SYSFS_POWER |
881 | /* acpi_battery_update could remove power_supply object */ |
882 | if (battery->bat.dev) |
883 | power_supply_changed(&battery->bat); |
884 | #endif |
885 | } |
886 | |
887 | static int acpi_battery_add(struct acpi_device *device) |
888 | { |
889 | int result = 0; |
890 | struct acpi_battery *battery = NULL; |
891 | acpi_handle handle; |
892 | if (!device) |
893 | return -EINVAL; |
894 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
895 | if (!battery) |
896 | return -ENOMEM; |
897 | battery->device = device; |
898 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
899 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); |
900 | device->driver_data = battery; |
901 | mutex_init(&battery->lock); |
902 | if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle, |
903 | "_BIX", &handle))) |
904 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
905 | acpi_battery_update(battery); |
906 | #ifdef CONFIG_ACPI_PROCFS_POWER |
907 | result = acpi_battery_add_fs(device); |
908 | #endif |
909 | if (!result) { |
910 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
911 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
912 | device->status.battery_present ? "present" : "absent"); |
913 | } else { |
914 | #ifdef CONFIG_ACPI_PROCFS_POWER |
915 | acpi_battery_remove_fs(device); |
916 | #endif |
917 | kfree(battery); |
918 | } |
919 | return result; |
920 | } |
921 | |
922 | static int acpi_battery_remove(struct acpi_device *device, int type) |
923 | { |
924 | struct acpi_battery *battery = NULL; |
925 | |
926 | if (!device || !acpi_driver_data(device)) |
927 | return -EINVAL; |
928 | battery = acpi_driver_data(device); |
929 | #ifdef CONFIG_ACPI_PROCFS_POWER |
930 | acpi_battery_remove_fs(device); |
931 | #endif |
932 | #ifdef CONFIG_ACPI_SYSFS_POWER |
933 | sysfs_remove_battery(battery); |
934 | #endif |
935 | mutex_destroy(&battery->lock); |
936 | kfree(battery); |
937 | return 0; |
938 | } |
939 | |
940 | /* this is needed to learn about changes made in suspended state */ |
941 | static int acpi_battery_resume(struct acpi_device *device) |
942 | { |
943 | struct acpi_battery *battery; |
944 | if (!device) |
945 | return -EINVAL; |
946 | battery = acpi_driver_data(device); |
947 | battery->update_time = 0; |
948 | acpi_battery_update(battery); |
949 | return 0; |
950 | } |
951 | |
952 | static struct acpi_driver acpi_battery_driver = { |
953 | .name = "battery", |
954 | .class = ACPI_BATTERY_CLASS, |
955 | .ids = battery_device_ids, |
956 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
957 | .ops = { |
958 | .add = acpi_battery_add, |
959 | .resume = acpi_battery_resume, |
960 | .remove = acpi_battery_remove, |
961 | .notify = acpi_battery_notify, |
962 | }, |
963 | }; |
964 | |
965 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
966 | { |
967 | if (acpi_disabled) |
968 | return; |
969 | #ifdef CONFIG_ACPI_PROCFS_POWER |
970 | acpi_battery_dir = acpi_lock_battery_dir(); |
971 | if (!acpi_battery_dir) |
972 | return; |
973 | #endif |
974 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
975 | #ifdef CONFIG_ACPI_PROCFS_POWER |
976 | acpi_unlock_battery_dir(acpi_battery_dir); |
977 | #endif |
978 | return; |
979 | } |
980 | return; |
981 | } |
982 | |
983 | static int __init acpi_battery_init(void) |
984 | { |
985 | async_schedule(acpi_battery_init_async, NULL); |
986 | return 0; |
987 | } |
988 | |
989 | static void __exit acpi_battery_exit(void) |
990 | { |
991 | acpi_bus_unregister_driver(&acpi_battery_driver); |
992 | #ifdef CONFIG_ACPI_PROCFS_POWER |
993 | acpi_unlock_battery_dir(acpi_battery_dir); |
994 | #endif |
995 | } |
996 | |
997 | module_init(acpi_battery_init); |
998 | module_exit(acpi_battery_exit); |
999 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9