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 | #include <linux/power_supply.h> |
46 | |
47 | #define PREFIX "ACPI: " |
48 | |
49 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
50 | |
51 | #define ACPI_BATTERY_CLASS "battery" |
52 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
53 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
54 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 |
55 | #define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82 |
56 | |
57 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
58 | |
59 | ACPI_MODULE_NAME("battery"); |
60 | |
61 | MODULE_AUTHOR("Paul Diefenbaugh"); |
62 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
63 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
64 | MODULE_LICENSE("GPL"); |
65 | |
66 | static unsigned int cache_time = 1000; |
67 | module_param(cache_time, uint, 0644); |
68 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); |
69 | |
70 | #ifdef CONFIG_ACPI_PROCFS_POWER |
71 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
72 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); |
73 | |
74 | enum acpi_battery_files { |
75 | info_tag = 0, |
76 | state_tag, |
77 | alarm_tag, |
78 | ACPI_BATTERY_NUMFILES, |
79 | }; |
80 | |
81 | #endif |
82 | |
83 | static const struct acpi_device_id battery_device_ids[] = { |
84 | {"PNP0C0A", 0}, |
85 | {"", 0}, |
86 | }; |
87 | |
88 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
89 | |
90 | enum { |
91 | ACPI_BATTERY_ALARM_PRESENT, |
92 | ACPI_BATTERY_XINFO_PRESENT, |
93 | /* For buggy DSDTs that report negative 16-bit values for either |
94 | * charging or discharging current and/or report 0 as 65536 |
95 | * due to bad math. |
96 | */ |
97 | ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, |
98 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
99 | }; |
100 | |
101 | struct acpi_battery { |
102 | struct mutex lock; |
103 | struct power_supply bat; |
104 | struct acpi_device *device; |
105 | unsigned long update_time; |
106 | int rate_now; |
107 | int capacity_now; |
108 | int voltage_now; |
109 | int design_capacity; |
110 | int full_charge_capacity; |
111 | int technology; |
112 | int design_voltage; |
113 | int design_capacity_warning; |
114 | int design_capacity_low; |
115 | int cycle_count; |
116 | int measurement_accuracy; |
117 | int max_sampling_time; |
118 | int min_sampling_time; |
119 | int max_averaging_interval; |
120 | int min_averaging_interval; |
121 | int capacity_granularity_1; |
122 | int capacity_granularity_2; |
123 | int alarm; |
124 | char model_number[32]; |
125 | char serial_number[32]; |
126 | char type[32]; |
127 | char oem_info[32]; |
128 | int state; |
129 | int power_unit; |
130 | unsigned long flags; |
131 | }; |
132 | |
133 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); |
134 | |
135 | inline int acpi_battery_present(struct acpi_battery *battery) |
136 | { |
137 | return battery->device->status.battery_present; |
138 | } |
139 | |
140 | static int acpi_battery_technology(struct acpi_battery *battery) |
141 | { |
142 | if (!strcasecmp("NiCd", battery->type)) |
143 | return POWER_SUPPLY_TECHNOLOGY_NiCd; |
144 | if (!strcasecmp("NiMH", battery->type)) |
145 | return POWER_SUPPLY_TECHNOLOGY_NiMH; |
146 | if (!strcasecmp("LION", battery->type)) |
147 | return POWER_SUPPLY_TECHNOLOGY_LION; |
148 | if (!strncasecmp("LI-ION", battery->type, 6)) |
149 | return POWER_SUPPLY_TECHNOLOGY_LION; |
150 | if (!strcasecmp("LiP", battery->type)) |
151 | return POWER_SUPPLY_TECHNOLOGY_LIPO; |
152 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
153 | } |
154 | |
155 | static int acpi_battery_get_state(struct acpi_battery *battery); |
156 | |
157 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
158 | { |
159 | /* either charging or discharging */ |
160 | if (battery->state != 0) |
161 | return 0; |
162 | |
163 | /* battery not reporting charge */ |
164 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || |
165 | battery->capacity_now == 0) |
166 | return 0; |
167 | |
168 | /* good batteries update full_charge as the batteries degrade */ |
169 | if (battery->full_charge_capacity == battery->capacity_now) |
170 | return 1; |
171 | |
172 | /* fallback to using design values for broken batteries */ |
173 | if (battery->design_capacity == battery->capacity_now) |
174 | return 1; |
175 | |
176 | /* we don't do any sort of metric based on percentages */ |
177 | return 0; |
178 | } |
179 | |
180 | static int acpi_battery_get_property(struct power_supply *psy, |
181 | enum power_supply_property psp, |
182 | union power_supply_propval *val) |
183 | { |
184 | int ret = 0; |
185 | struct acpi_battery *battery = to_acpi_battery(psy); |
186 | |
187 | if (acpi_battery_present(battery)) { |
188 | /* run battery update only if it is present */ |
189 | acpi_battery_get_state(battery); |
190 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) |
191 | return -ENODEV; |
192 | switch (psp) { |
193 | case POWER_SUPPLY_PROP_STATUS: |
194 | if (battery->state & 0x01) |
195 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
196 | else if (battery->state & 0x02) |
197 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
198 | else if (acpi_battery_is_charged(battery)) |
199 | val->intval = POWER_SUPPLY_STATUS_FULL; |
200 | else |
201 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
202 | break; |
203 | case POWER_SUPPLY_PROP_PRESENT: |
204 | val->intval = acpi_battery_present(battery); |
205 | break; |
206 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
207 | val->intval = acpi_battery_technology(battery); |
208 | break; |
209 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
210 | val->intval = battery->cycle_count; |
211 | break; |
212 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
213 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
214 | ret = -ENODEV; |
215 | else |
216 | val->intval = battery->design_voltage * 1000; |
217 | break; |
218 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
219 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
220 | ret = -ENODEV; |
221 | else |
222 | val->intval = battery->voltage_now * 1000; |
223 | break; |
224 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
225 | case POWER_SUPPLY_PROP_POWER_NOW: |
226 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
227 | ret = -ENODEV; |
228 | else |
229 | val->intval = battery->rate_now * 1000; |
230 | break; |
231 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
232 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
233 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
234 | ret = -ENODEV; |
235 | else |
236 | val->intval = battery->design_capacity * 1000; |
237 | break; |
238 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
239 | case POWER_SUPPLY_PROP_ENERGY_FULL: |
240 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
241 | ret = -ENODEV; |
242 | else |
243 | val->intval = battery->full_charge_capacity * 1000; |
244 | break; |
245 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
246 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
247 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
248 | ret = -ENODEV; |
249 | else |
250 | val->intval = battery->capacity_now * 1000; |
251 | break; |
252 | case POWER_SUPPLY_PROP_MODEL_NAME: |
253 | val->strval = battery->model_number; |
254 | break; |
255 | case POWER_SUPPLY_PROP_MANUFACTURER: |
256 | val->strval = battery->oem_info; |
257 | break; |
258 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
259 | val->strval = battery->serial_number; |
260 | break; |
261 | default: |
262 | ret = -EINVAL; |
263 | } |
264 | return ret; |
265 | } |
266 | |
267 | static enum power_supply_property charge_battery_props[] = { |
268 | POWER_SUPPLY_PROP_STATUS, |
269 | POWER_SUPPLY_PROP_PRESENT, |
270 | POWER_SUPPLY_PROP_TECHNOLOGY, |
271 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
272 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
273 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
274 | POWER_SUPPLY_PROP_CURRENT_NOW, |
275 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
276 | POWER_SUPPLY_PROP_CHARGE_FULL, |
277 | POWER_SUPPLY_PROP_CHARGE_NOW, |
278 | POWER_SUPPLY_PROP_MODEL_NAME, |
279 | POWER_SUPPLY_PROP_MANUFACTURER, |
280 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
281 | }; |
282 | |
283 | static enum power_supply_property energy_battery_props[] = { |
284 | POWER_SUPPLY_PROP_STATUS, |
285 | POWER_SUPPLY_PROP_PRESENT, |
286 | POWER_SUPPLY_PROP_TECHNOLOGY, |
287 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
288 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
289 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
290 | POWER_SUPPLY_PROP_POWER_NOW, |
291 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
292 | POWER_SUPPLY_PROP_ENERGY_FULL, |
293 | POWER_SUPPLY_PROP_ENERGY_NOW, |
294 | POWER_SUPPLY_PROP_MODEL_NAME, |
295 | POWER_SUPPLY_PROP_MANUFACTURER, |
296 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
297 | }; |
298 | |
299 | #ifdef CONFIG_ACPI_PROCFS_POWER |
300 | inline char *acpi_battery_units(struct acpi_battery *battery) |
301 | { |
302 | return (battery->power_unit)?"mA":"mW"; |
303 | } |
304 | #endif |
305 | |
306 | /* -------------------------------------------------------------------------- |
307 | Battery Management |
308 | -------------------------------------------------------------------------- */ |
309 | struct acpi_offsets { |
310 | size_t offset; /* offset inside struct acpi_sbs_battery */ |
311 | u8 mode; /* int or string? */ |
312 | }; |
313 | |
314 | static struct acpi_offsets state_offsets[] = { |
315 | {offsetof(struct acpi_battery, state), 0}, |
316 | {offsetof(struct acpi_battery, rate_now), 0}, |
317 | {offsetof(struct acpi_battery, capacity_now), 0}, |
318 | {offsetof(struct acpi_battery, voltage_now), 0}, |
319 | }; |
320 | |
321 | static struct acpi_offsets info_offsets[] = { |
322 | {offsetof(struct acpi_battery, power_unit), 0}, |
323 | {offsetof(struct acpi_battery, design_capacity), 0}, |
324 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
325 | {offsetof(struct acpi_battery, technology), 0}, |
326 | {offsetof(struct acpi_battery, design_voltage), 0}, |
327 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, |
328 | {offsetof(struct acpi_battery, design_capacity_low), 0}, |
329 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
330 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
331 | {offsetof(struct acpi_battery, model_number), 1}, |
332 | {offsetof(struct acpi_battery, serial_number), 1}, |
333 | {offsetof(struct acpi_battery, type), 1}, |
334 | {offsetof(struct acpi_battery, oem_info), 1}, |
335 | }; |
336 | |
337 | static struct acpi_offsets extended_info_offsets[] = { |
338 | {offsetof(struct acpi_battery, power_unit), 0}, |
339 | {offsetof(struct acpi_battery, design_capacity), 0}, |
340 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
341 | {offsetof(struct acpi_battery, technology), 0}, |
342 | {offsetof(struct acpi_battery, design_voltage), 0}, |
343 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, |
344 | {offsetof(struct acpi_battery, design_capacity_low), 0}, |
345 | {offsetof(struct acpi_battery, cycle_count), 0}, |
346 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, |
347 | {offsetof(struct acpi_battery, max_sampling_time), 0}, |
348 | {offsetof(struct acpi_battery, min_sampling_time), 0}, |
349 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, |
350 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, |
351 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
352 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
353 | {offsetof(struct acpi_battery, model_number), 1}, |
354 | {offsetof(struct acpi_battery, serial_number), 1}, |
355 | {offsetof(struct acpi_battery, type), 1}, |
356 | {offsetof(struct acpi_battery, oem_info), 1}, |
357 | }; |
358 | |
359 | static int extract_package(struct acpi_battery *battery, |
360 | union acpi_object *package, |
361 | struct acpi_offsets *offsets, int num) |
362 | { |
363 | int i; |
364 | union acpi_object *element; |
365 | if (package->type != ACPI_TYPE_PACKAGE) |
366 | return -EFAULT; |
367 | for (i = 0; i < num; ++i) { |
368 | if (package->package.count <= i) |
369 | return -EFAULT; |
370 | element = &package->package.elements[i]; |
371 | if (offsets[i].mode) { |
372 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
373 | if (element->type == ACPI_TYPE_STRING || |
374 | element->type == ACPI_TYPE_BUFFER) |
375 | strncpy(ptr, element->string.pointer, 32); |
376 | else if (element->type == ACPI_TYPE_INTEGER) { |
377 | strncpy(ptr, (u8 *)&element->integer.value, |
378 | sizeof(u64)); |
379 | ptr[sizeof(u64)] = 0; |
380 | } else |
381 | *ptr = 0; /* don't have value */ |
382 | } else { |
383 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
384 | *x = (element->type == ACPI_TYPE_INTEGER) ? |
385 | element->integer.value : -1; |
386 | } |
387 | } |
388 | return 0; |
389 | } |
390 | |
391 | static int acpi_battery_get_status(struct acpi_battery *battery) |
392 | { |
393 | if (acpi_bus_get_status(battery->device)) { |
394 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
395 | return -ENODEV; |
396 | } |
397 | return 0; |
398 | } |
399 | |
400 | static int acpi_battery_get_info(struct acpi_battery *battery) |
401 | { |
402 | int result = -EFAULT; |
403 | acpi_status status = 0; |
404 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)? |
405 | "_BIX" : "_BIF"; |
406 | |
407 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
408 | |
409 | if (!acpi_battery_present(battery)) |
410 | return 0; |
411 | mutex_lock(&battery->lock); |
412 | status = acpi_evaluate_object(battery->device->handle, name, |
413 | NULL, &buffer); |
414 | mutex_unlock(&battery->lock); |
415 | |
416 | if (ACPI_FAILURE(status)) { |
417 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
418 | return -ENODEV; |
419 | } |
420 | if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) |
421 | result = extract_package(battery, buffer.pointer, |
422 | extended_info_offsets, |
423 | ARRAY_SIZE(extended_info_offsets)); |
424 | else |
425 | result = extract_package(battery, buffer.pointer, |
426 | info_offsets, ARRAY_SIZE(info_offsets)); |
427 | kfree(buffer.pointer); |
428 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
429 | battery->full_charge_capacity = battery->design_capacity; |
430 | return result; |
431 | } |
432 | |
433 | static int acpi_battery_get_state(struct acpi_battery *battery) |
434 | { |
435 | int result = 0; |
436 | acpi_status status = 0; |
437 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
438 | |
439 | if (!acpi_battery_present(battery)) |
440 | return 0; |
441 | |
442 | if (battery->update_time && |
443 | time_before(jiffies, battery->update_time + |
444 | msecs_to_jiffies(cache_time))) |
445 | return 0; |
446 | |
447 | mutex_lock(&battery->lock); |
448 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
449 | NULL, &buffer); |
450 | mutex_unlock(&battery->lock); |
451 | |
452 | if (ACPI_FAILURE(status)) { |
453 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
454 | return -ENODEV; |
455 | } |
456 | |
457 | result = extract_package(battery, buffer.pointer, |
458 | state_offsets, ARRAY_SIZE(state_offsets)); |
459 | battery->update_time = jiffies; |
460 | kfree(buffer.pointer); |
461 | |
462 | if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) && |
463 | battery->rate_now != -1) |
464 | battery->rate_now = abs((s16)battery->rate_now); |
465 | |
466 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
467 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) |
468 | battery->capacity_now = (battery->capacity_now * |
469 | battery->full_charge_capacity) / 100; |
470 | return result; |
471 | } |
472 | |
473 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
474 | { |
475 | acpi_status status = 0; |
476 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
477 | struct acpi_object_list arg_list = { 1, &arg0 }; |
478 | |
479 | if (!acpi_battery_present(battery) || |
480 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
481 | return -ENODEV; |
482 | |
483 | arg0.integer.value = battery->alarm; |
484 | |
485 | mutex_lock(&battery->lock); |
486 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
487 | &arg_list, NULL); |
488 | mutex_unlock(&battery->lock); |
489 | |
490 | if (ACPI_FAILURE(status)) |
491 | return -ENODEV; |
492 | |
493 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
494 | return 0; |
495 | } |
496 | |
497 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
498 | { |
499 | acpi_status status = AE_OK; |
500 | acpi_handle handle = NULL; |
501 | |
502 | /* See if alarms are supported, and if so, set default */ |
503 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
504 | if (ACPI_FAILURE(status)) { |
505 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
506 | return 0; |
507 | } |
508 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
509 | if (!battery->alarm) |
510 | battery->alarm = battery->design_capacity_warning; |
511 | return acpi_battery_set_alarm(battery); |
512 | } |
513 | |
514 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
515 | struct device_attribute *attr, |
516 | char *buf) |
517 | { |
518 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
519 | return sprintf(buf, "%d\n", battery->alarm * 1000); |
520 | } |
521 | |
522 | static ssize_t acpi_battery_alarm_store(struct device *dev, |
523 | struct device_attribute *attr, |
524 | const char *buf, size_t count) |
525 | { |
526 | unsigned long x; |
527 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
528 | if (sscanf(buf, "%ld\n", &x) == 1) |
529 | battery->alarm = x/1000; |
530 | if (acpi_battery_present(battery)) |
531 | acpi_battery_set_alarm(battery); |
532 | return count; |
533 | } |
534 | |
535 | static struct device_attribute alarm_attr = { |
536 | .attr = {.name = "alarm", .mode = 0644}, |
537 | .show = acpi_battery_alarm_show, |
538 | .store = acpi_battery_alarm_store, |
539 | }; |
540 | |
541 | static int sysfs_add_battery(struct acpi_battery *battery) |
542 | { |
543 | int result; |
544 | |
545 | if (battery->power_unit) { |
546 | battery->bat.properties = charge_battery_props; |
547 | battery->bat.num_properties = |
548 | ARRAY_SIZE(charge_battery_props); |
549 | } else { |
550 | battery->bat.properties = energy_battery_props; |
551 | battery->bat.num_properties = |
552 | ARRAY_SIZE(energy_battery_props); |
553 | } |
554 | |
555 | battery->bat.name = acpi_device_bid(battery->device); |
556 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; |
557 | battery->bat.get_property = acpi_battery_get_property; |
558 | |
559 | result = power_supply_register(&battery->device->dev, &battery->bat); |
560 | if (result) |
561 | return result; |
562 | return device_create_file(battery->bat.dev, &alarm_attr); |
563 | } |
564 | |
565 | static void sysfs_remove_battery(struct acpi_battery *battery) |
566 | { |
567 | if (!battery->bat.dev) |
568 | return; |
569 | device_remove_file(battery->bat.dev, &alarm_attr); |
570 | power_supply_unregister(&battery->bat); |
571 | battery->bat.dev = NULL; |
572 | } |
573 | |
574 | static void acpi_battery_quirks(struct acpi_battery *battery) |
575 | { |
576 | if (dmi_name_in_vendors("Acer") && battery->power_unit) { |
577 | set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags); |
578 | } |
579 | } |
580 | |
581 | /* |
582 | * According to the ACPI spec, some kinds of primary batteries can |
583 | * report percentage battery remaining capacity directly to OS. |
584 | * In this case, it reports the Last Full Charged Capacity == 100 |
585 | * and BatteryPresentRate == 0xFFFFFFFF. |
586 | * |
587 | * Now we found some battery reports percentage remaining capacity |
588 | * even if it's rechargeable. |
589 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 |
590 | * |
591 | * Handle this correctly so that they won't break userspace. |
592 | */ |
593 | static void acpi_battery_quirks2(struct acpi_battery *battery) |
594 | { |
595 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
596 | return ; |
597 | |
598 | if (battery->full_charge_capacity == 100 && |
599 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && |
600 | battery->capacity_now >=0 && battery->capacity_now <= 100) { |
601 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
602 | battery->full_charge_capacity = battery->design_capacity; |
603 | battery->capacity_now = (battery->capacity_now * |
604 | battery->full_charge_capacity) / 100; |
605 | } |
606 | } |
607 | |
608 | static int acpi_battery_update(struct acpi_battery *battery) |
609 | { |
610 | int result, old_present = acpi_battery_present(battery); |
611 | result = acpi_battery_get_status(battery); |
612 | if (result) |
613 | return result; |
614 | if (!acpi_battery_present(battery)) { |
615 | sysfs_remove_battery(battery); |
616 | battery->update_time = 0; |
617 | return 0; |
618 | } |
619 | if (!battery->update_time || |
620 | old_present != acpi_battery_present(battery)) { |
621 | result = acpi_battery_get_info(battery); |
622 | if (result) |
623 | return result; |
624 | acpi_battery_quirks(battery); |
625 | acpi_battery_init_alarm(battery); |
626 | } |
627 | if (!battery->bat.dev) |
628 | sysfs_add_battery(battery); |
629 | result = acpi_battery_get_state(battery); |
630 | acpi_battery_quirks2(battery); |
631 | return result; |
632 | } |
633 | |
634 | static void acpi_battery_refresh(struct acpi_battery *battery) |
635 | { |
636 | if (!battery->bat.dev) |
637 | return; |
638 | |
639 | acpi_battery_get_info(battery); |
640 | /* The battery may have changed its reporting units. */ |
641 | sysfs_remove_battery(battery); |
642 | sysfs_add_battery(battery); |
643 | } |
644 | |
645 | /* -------------------------------------------------------------------------- |
646 | FS Interface (/proc) |
647 | -------------------------------------------------------------------------- */ |
648 | |
649 | #ifdef CONFIG_ACPI_PROCFS_POWER |
650 | static struct proc_dir_entry *acpi_battery_dir; |
651 | |
652 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
653 | { |
654 | struct acpi_battery *battery = seq->private; |
655 | |
656 | if (result) |
657 | goto end; |
658 | |
659 | seq_printf(seq, "present: %s\n", |
660 | acpi_battery_present(battery)?"yes":"no"); |
661 | if (!acpi_battery_present(battery)) |
662 | goto end; |
663 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
664 | seq_printf(seq, "design capacity: unknown\n"); |
665 | else |
666 | seq_printf(seq, "design capacity: %d %sh\n", |
667 | battery->design_capacity, |
668 | acpi_battery_units(battery)); |
669 | |
670 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
671 | seq_printf(seq, "last full capacity: unknown\n"); |
672 | else |
673 | seq_printf(seq, "last full capacity: %d %sh\n", |
674 | battery->full_charge_capacity, |
675 | acpi_battery_units(battery)); |
676 | |
677 | seq_printf(seq, "battery technology: %srechargeable\n", |
678 | (!battery->technology)?"non-":""); |
679 | |
680 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
681 | seq_printf(seq, "design voltage: unknown\n"); |
682 | else |
683 | seq_printf(seq, "design voltage: %d mV\n", |
684 | battery->design_voltage); |
685 | seq_printf(seq, "design capacity warning: %d %sh\n", |
686 | battery->design_capacity_warning, |
687 | acpi_battery_units(battery)); |
688 | seq_printf(seq, "design capacity low: %d %sh\n", |
689 | battery->design_capacity_low, |
690 | acpi_battery_units(battery)); |
691 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); |
692 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
693 | battery->capacity_granularity_1, |
694 | acpi_battery_units(battery)); |
695 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
696 | battery->capacity_granularity_2, |
697 | acpi_battery_units(battery)); |
698 | seq_printf(seq, "model number: %s\n", battery->model_number); |
699 | seq_printf(seq, "serial number: %s\n", battery->serial_number); |
700 | seq_printf(seq, "battery type: %s\n", battery->type); |
701 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); |
702 | end: |
703 | if (result) |
704 | seq_printf(seq, "ERROR: Unable to read battery info\n"); |
705 | return result; |
706 | } |
707 | |
708 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
709 | { |
710 | struct acpi_battery *battery = seq->private; |
711 | |
712 | if (result) |
713 | goto end; |
714 | |
715 | seq_printf(seq, "present: %s\n", |
716 | acpi_battery_present(battery)?"yes":"no"); |
717 | if (!acpi_battery_present(battery)) |
718 | goto end; |
719 | |
720 | seq_printf(seq, "capacity state: %s\n", |
721 | (battery->state & 0x04)?"critical":"ok"); |
722 | if ((battery->state & 0x01) && (battery->state & 0x02)) |
723 | seq_printf(seq, |
724 | "charging state: charging/discharging\n"); |
725 | else if (battery->state & 0x01) |
726 | seq_printf(seq, "charging state: discharging\n"); |
727 | else if (battery->state & 0x02) |
728 | seq_printf(seq, "charging state: charging\n"); |
729 | else |
730 | seq_printf(seq, "charging state: charged\n"); |
731 | |
732 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
733 | seq_printf(seq, "present rate: unknown\n"); |
734 | else |
735 | seq_printf(seq, "present rate: %d %s\n", |
736 | battery->rate_now, acpi_battery_units(battery)); |
737 | |
738 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
739 | seq_printf(seq, "remaining capacity: unknown\n"); |
740 | else |
741 | seq_printf(seq, "remaining capacity: %d %sh\n", |
742 | battery->capacity_now, acpi_battery_units(battery)); |
743 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
744 | seq_printf(seq, "present voltage: unknown\n"); |
745 | else |
746 | seq_printf(seq, "present voltage: %d mV\n", |
747 | battery->voltage_now); |
748 | end: |
749 | if (result) |
750 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
751 | |
752 | return result; |
753 | } |
754 | |
755 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
756 | { |
757 | struct acpi_battery *battery = seq->private; |
758 | |
759 | if (result) |
760 | goto end; |
761 | |
762 | if (!acpi_battery_present(battery)) { |
763 | seq_printf(seq, "present: no\n"); |
764 | goto end; |
765 | } |
766 | seq_printf(seq, "alarm: "); |
767 | if (!battery->alarm) |
768 | seq_printf(seq, "unsupported\n"); |
769 | else |
770 | seq_printf(seq, "%u %sh\n", battery->alarm, |
771 | acpi_battery_units(battery)); |
772 | end: |
773 | if (result) |
774 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); |
775 | return result; |
776 | } |
777 | |
778 | static ssize_t acpi_battery_write_alarm(struct file *file, |
779 | const char __user * buffer, |
780 | size_t count, loff_t * ppos) |
781 | { |
782 | int result = 0; |
783 | char alarm_string[12] = { '\0' }; |
784 | struct seq_file *m = file->private_data; |
785 | struct acpi_battery *battery = m->private; |
786 | |
787 | if (!battery || (count > sizeof(alarm_string) - 1)) |
788 | return -EINVAL; |
789 | if (!acpi_battery_present(battery)) { |
790 | result = -ENODEV; |
791 | goto end; |
792 | } |
793 | if (copy_from_user(alarm_string, buffer, count)) { |
794 | result = -EFAULT; |
795 | goto end; |
796 | } |
797 | alarm_string[count] = '\0'; |
798 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
799 | result = acpi_battery_set_alarm(battery); |
800 | end: |
801 | if (!result) |
802 | return count; |
803 | return result; |
804 | } |
805 | |
806 | typedef int(*print_func)(struct seq_file *seq, int result); |
807 | |
808 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { |
809 | acpi_battery_print_info, |
810 | acpi_battery_print_state, |
811 | acpi_battery_print_alarm, |
812 | }; |
813 | |
814 | static int acpi_battery_read(int fid, struct seq_file *seq) |
815 | { |
816 | struct acpi_battery *battery = seq->private; |
817 | int result = acpi_battery_update(battery); |
818 | return acpi_print_funcs[fid](seq, result); |
819 | } |
820 | |
821 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
822 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ |
823 | { \ |
824 | return acpi_battery_read(_name##_tag, seq); \ |
825 | } \ |
826 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ |
827 | { \ |
828 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ |
829 | } |
830 | |
831 | DECLARE_FILE_FUNCTIONS(info); |
832 | DECLARE_FILE_FUNCTIONS(state); |
833 | DECLARE_FILE_FUNCTIONS(alarm); |
834 | |
835 | #undef DECLARE_FILE_FUNCTIONS |
836 | |
837 | #define FILE_DESCRIPTION_RO(_name) \ |
838 | { \ |
839 | .name = __stringify(_name), \ |
840 | .mode = S_IRUGO, \ |
841 | .ops = { \ |
842 | .open = acpi_battery_##_name##_open_fs, \ |
843 | .read = seq_read, \ |
844 | .llseek = seq_lseek, \ |
845 | .release = single_release, \ |
846 | .owner = THIS_MODULE, \ |
847 | }, \ |
848 | } |
849 | |
850 | #define FILE_DESCRIPTION_RW(_name) \ |
851 | { \ |
852 | .name = __stringify(_name), \ |
853 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ |
854 | .ops = { \ |
855 | .open = acpi_battery_##_name##_open_fs, \ |
856 | .read = seq_read, \ |
857 | .llseek = seq_lseek, \ |
858 | .write = acpi_battery_write_##_name, \ |
859 | .release = single_release, \ |
860 | .owner = THIS_MODULE, \ |
861 | }, \ |
862 | } |
863 | |
864 | static struct battery_file { |
865 | struct file_operations ops; |
866 | mode_t mode; |
867 | const char *name; |
868 | } acpi_battery_file[] = { |
869 | FILE_DESCRIPTION_RO(info), |
870 | FILE_DESCRIPTION_RO(state), |
871 | FILE_DESCRIPTION_RW(alarm), |
872 | }; |
873 | |
874 | #undef FILE_DESCRIPTION_RO |
875 | #undef FILE_DESCRIPTION_RW |
876 | |
877 | static int acpi_battery_add_fs(struct acpi_device *device) |
878 | { |
879 | struct proc_dir_entry *entry = NULL; |
880 | int i; |
881 | |
882 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," |
883 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); |
884 | if (!acpi_device_dir(device)) { |
885 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
886 | acpi_battery_dir); |
887 | if (!acpi_device_dir(device)) |
888 | return -ENODEV; |
889 | } |
890 | |
891 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
892 | entry = proc_create_data(acpi_battery_file[i].name, |
893 | acpi_battery_file[i].mode, |
894 | acpi_device_dir(device), |
895 | &acpi_battery_file[i].ops, |
896 | acpi_driver_data(device)); |
897 | if (!entry) |
898 | return -ENODEV; |
899 | } |
900 | return 0; |
901 | } |
902 | |
903 | static void acpi_battery_remove_fs(struct acpi_device *device) |
904 | { |
905 | int i; |
906 | if (!acpi_device_dir(device)) |
907 | return; |
908 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) |
909 | remove_proc_entry(acpi_battery_file[i].name, |
910 | acpi_device_dir(device)); |
911 | |
912 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
913 | acpi_device_dir(device) = NULL; |
914 | } |
915 | |
916 | #endif |
917 | |
918 | /* -------------------------------------------------------------------------- |
919 | Driver Interface |
920 | -------------------------------------------------------------------------- */ |
921 | |
922 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
923 | { |
924 | struct acpi_battery *battery = acpi_driver_data(device); |
925 | struct device *old; |
926 | |
927 | if (!battery) |
928 | return; |
929 | old = battery->bat.dev; |
930 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
931 | acpi_battery_refresh(battery); |
932 | acpi_battery_update(battery); |
933 | acpi_bus_generate_proc_event(device, event, |
934 | acpi_battery_present(battery)); |
935 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
936 | dev_name(&device->dev), event, |
937 | acpi_battery_present(battery)); |
938 | /* acpi_battery_update could remove power_supply object */ |
939 | if (old && battery->bat.dev) |
940 | power_supply_changed(&battery->bat); |
941 | } |
942 | |
943 | static int acpi_battery_add(struct acpi_device *device) |
944 | { |
945 | int result = 0; |
946 | struct acpi_battery *battery = NULL; |
947 | acpi_handle handle; |
948 | if (!device) |
949 | return -EINVAL; |
950 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
951 | if (!battery) |
952 | return -ENOMEM; |
953 | battery->device = device; |
954 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
955 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); |
956 | device->driver_data = battery; |
957 | mutex_init(&battery->lock); |
958 | if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle, |
959 | "_BIX", &handle))) |
960 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
961 | acpi_battery_update(battery); |
962 | #ifdef CONFIG_ACPI_PROCFS_POWER |
963 | result = acpi_battery_add_fs(device); |
964 | #endif |
965 | if (!result) { |
966 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
967 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
968 | device->status.battery_present ? "present" : "absent"); |
969 | } else { |
970 | #ifdef CONFIG_ACPI_PROCFS_POWER |
971 | acpi_battery_remove_fs(device); |
972 | #endif |
973 | kfree(battery); |
974 | } |
975 | return result; |
976 | } |
977 | |
978 | static int acpi_battery_remove(struct acpi_device *device, int type) |
979 | { |
980 | struct acpi_battery *battery = NULL; |
981 | |
982 | if (!device || !acpi_driver_data(device)) |
983 | return -EINVAL; |
984 | battery = acpi_driver_data(device); |
985 | #ifdef CONFIG_ACPI_PROCFS_POWER |
986 | acpi_battery_remove_fs(device); |
987 | #endif |
988 | sysfs_remove_battery(battery); |
989 | mutex_destroy(&battery->lock); |
990 | kfree(battery); |
991 | return 0; |
992 | } |
993 | |
994 | /* this is needed to learn about changes made in suspended state */ |
995 | static int acpi_battery_resume(struct acpi_device *device) |
996 | { |
997 | struct acpi_battery *battery; |
998 | if (!device) |
999 | return -EINVAL; |
1000 | battery = acpi_driver_data(device); |
1001 | battery->update_time = 0; |
1002 | acpi_battery_update(battery); |
1003 | return 0; |
1004 | } |
1005 | |
1006 | static struct acpi_driver acpi_battery_driver = { |
1007 | .name = "battery", |
1008 | .class = ACPI_BATTERY_CLASS, |
1009 | .ids = battery_device_ids, |
1010 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
1011 | .ops = { |
1012 | .add = acpi_battery_add, |
1013 | .resume = acpi_battery_resume, |
1014 | .remove = acpi_battery_remove, |
1015 | .notify = acpi_battery_notify, |
1016 | }, |
1017 | }; |
1018 | |
1019 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1020 | { |
1021 | if (acpi_disabled) |
1022 | return; |
1023 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1024 | acpi_battery_dir = acpi_lock_battery_dir(); |
1025 | if (!acpi_battery_dir) |
1026 | return; |
1027 | #endif |
1028 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
1029 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1030 | acpi_unlock_battery_dir(acpi_battery_dir); |
1031 | #endif |
1032 | return; |
1033 | } |
1034 | return; |
1035 | } |
1036 | |
1037 | static int __init acpi_battery_init(void) |
1038 | { |
1039 | async_schedule(acpi_battery_init_async, NULL); |
1040 | return 0; |
1041 | } |
1042 | |
1043 | static void __exit acpi_battery_exit(void) |
1044 | { |
1045 | acpi_bus_unregister_driver(&acpi_battery_driver); |
1046 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1047 | acpi_unlock_battery_dir(acpi_battery_dir); |
1048 | #endif |
1049 | } |
1050 | |
1051 | module_init(acpi_battery_init); |
1052 | module_exit(acpi_battery_exit); |
1053 |
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