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 | #include <linux/suspend.h> |
37 | #include <asm/unaligned.h> |
38 | |
39 | #ifdef CONFIG_ACPI_PROCFS_POWER |
40 | #include <linux/proc_fs.h> |
41 | #include <linux/seq_file.h> |
42 | #include <asm/uaccess.h> |
43 | #endif |
44 | |
45 | #include <acpi/acpi_bus.h> |
46 | #include <acpi/acpi_drivers.h> |
47 | #include <linux/power_supply.h> |
48 | |
49 | #define PREFIX "ACPI: " |
50 | |
51 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
52 | |
53 | #define ACPI_BATTERY_CLASS "battery" |
54 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
55 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
56 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 |
57 | #define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82 |
58 | |
59 | /* Battery power unit: 0 means mW, 1 means mA */ |
60 | #define ACPI_BATTERY_POWER_UNIT_MA 1 |
61 | |
62 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
63 | |
64 | ACPI_MODULE_NAME("battery"); |
65 | |
66 | MODULE_AUTHOR("Paul Diefenbaugh"); |
67 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
68 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
69 | MODULE_LICENSE("GPL"); |
70 | |
71 | static unsigned int cache_time = 1000; |
72 | module_param(cache_time, uint, 0644); |
73 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); |
74 | |
75 | #ifdef CONFIG_ACPI_PROCFS_POWER |
76 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
77 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); |
78 | |
79 | enum acpi_battery_files { |
80 | info_tag = 0, |
81 | state_tag, |
82 | alarm_tag, |
83 | ACPI_BATTERY_NUMFILES, |
84 | }; |
85 | |
86 | #endif |
87 | |
88 | static const struct acpi_device_id battery_device_ids[] = { |
89 | {"PNP0C0A", 0}, |
90 | {"", 0}, |
91 | }; |
92 | |
93 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
94 | |
95 | enum { |
96 | ACPI_BATTERY_ALARM_PRESENT, |
97 | ACPI_BATTERY_XINFO_PRESENT, |
98 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
99 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
100 | switches between mWh and mAh depending on whether the system |
101 | is running on battery or not. When mAh is the unit, most |
102 | reported values are incorrect and need to be adjusted by |
103 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. |
104 | Pre-2010 and 2012 models appear to always report in mWh and |
105 | are thus unaffected (tested with t42, t61, t500, x200, x300, |
106 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for |
107 | the 2011 models that fixes the issue (tested on x220 with a |
108 | post-1.29 BIOS), but as of Nov. 2012, no such update is |
109 | available for the 2010 models. */ |
110 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, |
111 | }; |
112 | |
113 | struct acpi_battery { |
114 | struct mutex lock; |
115 | struct mutex sysfs_lock; |
116 | struct power_supply bat; |
117 | struct acpi_device *device; |
118 | struct notifier_block pm_nb; |
119 | unsigned long update_time; |
120 | int rate_now; |
121 | int capacity_now; |
122 | int voltage_now; |
123 | int design_capacity; |
124 | int full_charge_capacity; |
125 | int technology; |
126 | int design_voltage; |
127 | int design_capacity_warning; |
128 | int design_capacity_low; |
129 | int cycle_count; |
130 | int measurement_accuracy; |
131 | int max_sampling_time; |
132 | int min_sampling_time; |
133 | int max_averaging_interval; |
134 | int min_averaging_interval; |
135 | int capacity_granularity_1; |
136 | int capacity_granularity_2; |
137 | int alarm; |
138 | char model_number[32]; |
139 | char serial_number[32]; |
140 | char type[32]; |
141 | char oem_info[32]; |
142 | int state; |
143 | int power_unit; |
144 | unsigned long flags; |
145 | }; |
146 | |
147 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
148 | |
149 | inline int acpi_battery_present(struct acpi_battery *battery) |
150 | { |
151 | return battery->device->status.battery_present; |
152 | } |
153 | |
154 | static int acpi_battery_technology(struct acpi_battery *battery) |
155 | { |
156 | if (!strcasecmp("NiCd", battery->type)) |
157 | return POWER_SUPPLY_TECHNOLOGY_NiCd; |
158 | if (!strcasecmp("NiMH", battery->type)) |
159 | return POWER_SUPPLY_TECHNOLOGY_NiMH; |
160 | if (!strcasecmp("LION", battery->type)) |
161 | return POWER_SUPPLY_TECHNOLOGY_LION; |
162 | if (!strncasecmp("LI-ION", battery->type, 6)) |
163 | return POWER_SUPPLY_TECHNOLOGY_LION; |
164 | if (!strcasecmp("LiP", battery->type)) |
165 | return POWER_SUPPLY_TECHNOLOGY_LIPO; |
166 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
167 | } |
168 | |
169 | static int acpi_battery_get_state(struct acpi_battery *battery); |
170 | |
171 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
172 | { |
173 | /* either charging or discharging */ |
174 | if (battery->state != 0) |
175 | return 0; |
176 | |
177 | /* battery not reporting charge */ |
178 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || |
179 | battery->capacity_now == 0) |
180 | return 0; |
181 | |
182 | /* good batteries update full_charge as the batteries degrade */ |
183 | if (battery->full_charge_capacity == battery->capacity_now) |
184 | return 1; |
185 | |
186 | /* fallback to using design values for broken batteries */ |
187 | if (battery->design_capacity == battery->capacity_now) |
188 | return 1; |
189 | |
190 | /* we don't do any sort of metric based on percentages */ |
191 | return 0; |
192 | } |
193 | |
194 | static int acpi_battery_get_property(struct power_supply *psy, |
195 | enum power_supply_property psp, |
196 | union power_supply_propval *val) |
197 | { |
198 | int ret = 0; |
199 | struct acpi_battery *battery = to_acpi_battery(psy); |
200 | |
201 | if (acpi_battery_present(battery)) { |
202 | /* run battery update only if it is present */ |
203 | acpi_battery_get_state(battery); |
204 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) |
205 | return -ENODEV; |
206 | switch (psp) { |
207 | case POWER_SUPPLY_PROP_STATUS: |
208 | if (battery->state & 0x01) |
209 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
210 | else if (battery->state & 0x02) |
211 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
212 | else if (acpi_battery_is_charged(battery)) |
213 | val->intval = POWER_SUPPLY_STATUS_FULL; |
214 | else |
215 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
216 | break; |
217 | case POWER_SUPPLY_PROP_PRESENT: |
218 | val->intval = acpi_battery_present(battery); |
219 | break; |
220 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
221 | val->intval = acpi_battery_technology(battery); |
222 | break; |
223 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
224 | val->intval = battery->cycle_count; |
225 | break; |
226 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
227 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
228 | ret = -ENODEV; |
229 | else |
230 | val->intval = battery->design_voltage * 1000; |
231 | break; |
232 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
233 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
234 | ret = -ENODEV; |
235 | else |
236 | val->intval = battery->voltage_now * 1000; |
237 | break; |
238 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
239 | case POWER_SUPPLY_PROP_POWER_NOW: |
240 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
241 | ret = -ENODEV; |
242 | else |
243 | val->intval = battery->rate_now * 1000; |
244 | break; |
245 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
246 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
247 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
248 | ret = -ENODEV; |
249 | else |
250 | val->intval = battery->design_capacity * 1000; |
251 | break; |
252 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
253 | case POWER_SUPPLY_PROP_ENERGY_FULL: |
254 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
255 | ret = -ENODEV; |
256 | else |
257 | val->intval = battery->full_charge_capacity * 1000; |
258 | break; |
259 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
260 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
261 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
262 | ret = -ENODEV; |
263 | else |
264 | val->intval = battery->capacity_now * 1000; |
265 | break; |
266 | case POWER_SUPPLY_PROP_CAPACITY: |
267 | if (battery->capacity_now && battery->full_charge_capacity) |
268 | val->intval = battery->capacity_now * 100/ |
269 | battery->full_charge_capacity; |
270 | else |
271 | val->intval = 0; |
272 | break; |
273 | case POWER_SUPPLY_PROP_MODEL_NAME: |
274 | val->strval = battery->model_number; |
275 | break; |
276 | case POWER_SUPPLY_PROP_MANUFACTURER: |
277 | val->strval = battery->oem_info; |
278 | break; |
279 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
280 | val->strval = battery->serial_number; |
281 | break; |
282 | default: |
283 | ret = -EINVAL; |
284 | } |
285 | return ret; |
286 | } |
287 | |
288 | static enum power_supply_property charge_battery_props[] = { |
289 | POWER_SUPPLY_PROP_STATUS, |
290 | POWER_SUPPLY_PROP_PRESENT, |
291 | POWER_SUPPLY_PROP_TECHNOLOGY, |
292 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
293 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
294 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
295 | POWER_SUPPLY_PROP_CURRENT_NOW, |
296 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
297 | POWER_SUPPLY_PROP_CHARGE_FULL, |
298 | POWER_SUPPLY_PROP_CHARGE_NOW, |
299 | POWER_SUPPLY_PROP_CAPACITY, |
300 | POWER_SUPPLY_PROP_MODEL_NAME, |
301 | POWER_SUPPLY_PROP_MANUFACTURER, |
302 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
303 | }; |
304 | |
305 | static enum power_supply_property energy_battery_props[] = { |
306 | POWER_SUPPLY_PROP_STATUS, |
307 | POWER_SUPPLY_PROP_PRESENT, |
308 | POWER_SUPPLY_PROP_TECHNOLOGY, |
309 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
310 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
311 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
312 | POWER_SUPPLY_PROP_POWER_NOW, |
313 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
314 | POWER_SUPPLY_PROP_ENERGY_FULL, |
315 | POWER_SUPPLY_PROP_ENERGY_NOW, |
316 | POWER_SUPPLY_PROP_CAPACITY, |
317 | POWER_SUPPLY_PROP_MODEL_NAME, |
318 | POWER_SUPPLY_PROP_MANUFACTURER, |
319 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
320 | }; |
321 | |
322 | #ifdef CONFIG_ACPI_PROCFS_POWER |
323 | inline char *acpi_battery_units(struct acpi_battery *battery) |
324 | { |
325 | return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ? |
326 | "mA" : "mW"; |
327 | } |
328 | #endif |
329 | |
330 | /* -------------------------------------------------------------------------- |
331 | Battery Management |
332 | -------------------------------------------------------------------------- */ |
333 | struct acpi_offsets { |
334 | size_t offset; /* offset inside struct acpi_sbs_battery */ |
335 | u8 mode; /* int or string? */ |
336 | }; |
337 | |
338 | static struct acpi_offsets state_offsets[] = { |
339 | {offsetof(struct acpi_battery, state), 0}, |
340 | {offsetof(struct acpi_battery, rate_now), 0}, |
341 | {offsetof(struct acpi_battery, capacity_now), 0}, |
342 | {offsetof(struct acpi_battery, voltage_now), 0}, |
343 | }; |
344 | |
345 | static struct acpi_offsets info_offsets[] = { |
346 | {offsetof(struct acpi_battery, power_unit), 0}, |
347 | {offsetof(struct acpi_battery, design_capacity), 0}, |
348 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
349 | {offsetof(struct acpi_battery, technology), 0}, |
350 | {offsetof(struct acpi_battery, design_voltage), 0}, |
351 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, |
352 | {offsetof(struct acpi_battery, design_capacity_low), 0}, |
353 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
354 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
355 | {offsetof(struct acpi_battery, model_number), 1}, |
356 | {offsetof(struct acpi_battery, serial_number), 1}, |
357 | {offsetof(struct acpi_battery, type), 1}, |
358 | {offsetof(struct acpi_battery, oem_info), 1}, |
359 | }; |
360 | |
361 | static struct acpi_offsets extended_info_offsets[] = { |
362 | {offsetof(struct acpi_battery, power_unit), 0}, |
363 | {offsetof(struct acpi_battery, design_capacity), 0}, |
364 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
365 | {offsetof(struct acpi_battery, technology), 0}, |
366 | {offsetof(struct acpi_battery, design_voltage), 0}, |
367 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, |
368 | {offsetof(struct acpi_battery, design_capacity_low), 0}, |
369 | {offsetof(struct acpi_battery, cycle_count), 0}, |
370 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, |
371 | {offsetof(struct acpi_battery, max_sampling_time), 0}, |
372 | {offsetof(struct acpi_battery, min_sampling_time), 0}, |
373 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, |
374 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, |
375 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
376 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
377 | {offsetof(struct acpi_battery, model_number), 1}, |
378 | {offsetof(struct acpi_battery, serial_number), 1}, |
379 | {offsetof(struct acpi_battery, type), 1}, |
380 | {offsetof(struct acpi_battery, oem_info), 1}, |
381 | }; |
382 | |
383 | static int extract_package(struct acpi_battery *battery, |
384 | union acpi_object *package, |
385 | struct acpi_offsets *offsets, int num) |
386 | { |
387 | int i; |
388 | union acpi_object *element; |
389 | if (package->type != ACPI_TYPE_PACKAGE) |
390 | return -EFAULT; |
391 | for (i = 0; i < num; ++i) { |
392 | if (package->package.count <= i) |
393 | return -EFAULT; |
394 | element = &package->package.elements[i]; |
395 | if (offsets[i].mode) { |
396 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
397 | if (element->type == ACPI_TYPE_STRING || |
398 | element->type == ACPI_TYPE_BUFFER) |
399 | strncpy(ptr, element->string.pointer, 32); |
400 | else if (element->type == ACPI_TYPE_INTEGER) { |
401 | strncpy(ptr, (u8 *)&element->integer.value, |
402 | sizeof(u64)); |
403 | ptr[sizeof(u64)] = 0; |
404 | } else |
405 | *ptr = 0; /* don't have value */ |
406 | } else { |
407 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
408 | *x = (element->type == ACPI_TYPE_INTEGER) ? |
409 | element->integer.value : -1; |
410 | } |
411 | } |
412 | return 0; |
413 | } |
414 | |
415 | static int acpi_battery_get_status(struct acpi_battery *battery) |
416 | { |
417 | if (acpi_bus_get_status(battery->device)) { |
418 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
419 | return -ENODEV; |
420 | } |
421 | return 0; |
422 | } |
423 | |
424 | static int acpi_battery_get_info(struct acpi_battery *battery) |
425 | { |
426 | int result = -EFAULT; |
427 | acpi_status status = 0; |
428 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)? |
429 | "_BIX" : "_BIF"; |
430 | |
431 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
432 | |
433 | if (!acpi_battery_present(battery)) |
434 | return 0; |
435 | mutex_lock(&battery->lock); |
436 | status = acpi_evaluate_object(battery->device->handle, name, |
437 | NULL, &buffer); |
438 | mutex_unlock(&battery->lock); |
439 | |
440 | if (ACPI_FAILURE(status)) { |
441 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
442 | return -ENODEV; |
443 | } |
444 | if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) |
445 | result = extract_package(battery, buffer.pointer, |
446 | extended_info_offsets, |
447 | ARRAY_SIZE(extended_info_offsets)); |
448 | else |
449 | result = extract_package(battery, buffer.pointer, |
450 | info_offsets, ARRAY_SIZE(info_offsets)); |
451 | kfree(buffer.pointer); |
452 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
453 | battery->full_charge_capacity = battery->design_capacity; |
454 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
455 | battery->power_unit && battery->design_voltage) { |
456 | battery->design_capacity = battery->design_capacity * |
457 | 10000 / battery->design_voltage; |
458 | battery->full_charge_capacity = battery->full_charge_capacity * |
459 | 10000 / battery->design_voltage; |
460 | battery->design_capacity_warning = |
461 | battery->design_capacity_warning * |
462 | 10000 / battery->design_voltage; |
463 | /* Curiously, design_capacity_low, unlike the rest of them, |
464 | is correct. */ |
465 | /* capacity_granularity_* equal 1 on the systems tested, so |
466 | it's impossible to tell if they would need an adjustment |
467 | or not if their values were higher. */ |
468 | } |
469 | return result; |
470 | } |
471 | |
472 | static int acpi_battery_get_state(struct acpi_battery *battery) |
473 | { |
474 | int result = 0; |
475 | acpi_status status = 0; |
476 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
477 | |
478 | if (!acpi_battery_present(battery)) |
479 | return 0; |
480 | |
481 | if (battery->update_time && |
482 | time_before(jiffies, battery->update_time + |
483 | msecs_to_jiffies(cache_time))) |
484 | return 0; |
485 | |
486 | mutex_lock(&battery->lock); |
487 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
488 | NULL, &buffer); |
489 | mutex_unlock(&battery->lock); |
490 | |
491 | if (ACPI_FAILURE(status)) { |
492 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
493 | return -ENODEV; |
494 | } |
495 | |
496 | result = extract_package(battery, buffer.pointer, |
497 | state_offsets, ARRAY_SIZE(state_offsets)); |
498 | battery->update_time = jiffies; |
499 | kfree(buffer.pointer); |
500 | |
501 | /* For buggy DSDTs that report negative 16-bit values for either |
502 | * charging or discharging current and/or report 0 as 65536 |
503 | * due to bad math. |
504 | */ |
505 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && |
506 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && |
507 | (s16)(battery->rate_now) < 0) { |
508 | battery->rate_now = abs((s16)battery->rate_now); |
509 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
510 | " invalid.\n"); |
511 | } |
512 | |
513 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
514 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) |
515 | battery->capacity_now = (battery->capacity_now * |
516 | battery->full_charge_capacity) / 100; |
517 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
518 | battery->power_unit && battery->design_voltage) { |
519 | battery->capacity_now = battery->capacity_now * |
520 | 10000 / battery->design_voltage; |
521 | } |
522 | return result; |
523 | } |
524 | |
525 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
526 | { |
527 | acpi_status status = 0; |
528 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
529 | struct acpi_object_list arg_list = { 1, &arg0 }; |
530 | |
531 | if (!acpi_battery_present(battery) || |
532 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
533 | return -ENODEV; |
534 | |
535 | arg0.integer.value = battery->alarm; |
536 | |
537 | mutex_lock(&battery->lock); |
538 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
539 | &arg_list, NULL); |
540 | mutex_unlock(&battery->lock); |
541 | |
542 | if (ACPI_FAILURE(status)) |
543 | return -ENODEV; |
544 | |
545 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
546 | return 0; |
547 | } |
548 | |
549 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
550 | { |
551 | acpi_status status = AE_OK; |
552 | acpi_handle handle = NULL; |
553 | |
554 | /* See if alarms are supported, and if so, set default */ |
555 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
556 | if (ACPI_FAILURE(status)) { |
557 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
558 | return 0; |
559 | } |
560 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
561 | if (!battery->alarm) |
562 | battery->alarm = battery->design_capacity_warning; |
563 | return acpi_battery_set_alarm(battery); |
564 | } |
565 | |
566 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
567 | struct device_attribute *attr, |
568 | char *buf) |
569 | { |
570 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
571 | return sprintf(buf, "%d\n", battery->alarm * 1000); |
572 | } |
573 | |
574 | static ssize_t acpi_battery_alarm_store(struct device *dev, |
575 | struct device_attribute *attr, |
576 | const char *buf, size_t count) |
577 | { |
578 | unsigned long x; |
579 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
580 | if (sscanf(buf, "%ld\n", &x) == 1) |
581 | battery->alarm = x/1000; |
582 | if (acpi_battery_present(battery)) |
583 | acpi_battery_set_alarm(battery); |
584 | return count; |
585 | } |
586 | |
587 | static struct device_attribute alarm_attr = { |
588 | .attr = {.name = "alarm", .mode = 0644}, |
589 | .show = acpi_battery_alarm_show, |
590 | .store = acpi_battery_alarm_store, |
591 | }; |
592 | |
593 | static int sysfs_add_battery(struct acpi_battery *battery) |
594 | { |
595 | int result; |
596 | |
597 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
598 | battery->bat.properties = charge_battery_props; |
599 | battery->bat.num_properties = |
600 | ARRAY_SIZE(charge_battery_props); |
601 | } else { |
602 | battery->bat.properties = energy_battery_props; |
603 | battery->bat.num_properties = |
604 | ARRAY_SIZE(energy_battery_props); |
605 | } |
606 | |
607 | battery->bat.name = acpi_device_bid(battery->device); |
608 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; |
609 | battery->bat.get_property = acpi_battery_get_property; |
610 | |
611 | result = power_supply_register(&battery->device->dev, &battery->bat); |
612 | if (result) |
613 | return result; |
614 | return device_create_file(battery->bat.dev, &alarm_attr); |
615 | } |
616 | |
617 | static void sysfs_remove_battery(struct acpi_battery *battery) |
618 | { |
619 | mutex_lock(&battery->sysfs_lock); |
620 | if (!battery->bat.dev) { |
621 | mutex_unlock(&battery->sysfs_lock); |
622 | return; |
623 | } |
624 | |
625 | device_remove_file(battery->bat.dev, &alarm_attr); |
626 | power_supply_unregister(&battery->bat); |
627 | battery->bat.dev = NULL; |
628 | mutex_unlock(&battery->sysfs_lock); |
629 | } |
630 | |
631 | static void find_battery(const struct dmi_header *dm, void *private) |
632 | { |
633 | struct acpi_battery *battery = (struct acpi_battery *)private; |
634 | /* Note: the hardcoded offsets below have been extracted from |
635 | the source code of dmidecode. */ |
636 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { |
637 | const u8 *dmi_data = (const u8 *)(dm + 1); |
638 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); |
639 | if (dm->length >= 18) |
640 | dmi_capacity *= dmi_data[17]; |
641 | if (battery->design_capacity * battery->design_voltage / 1000 |
642 | != dmi_capacity && |
643 | battery->design_capacity * 10 == dmi_capacity) |
644 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, |
645 | &battery->flags); |
646 | } |
647 | } |
648 | |
649 | /* |
650 | * According to the ACPI spec, some kinds of primary batteries can |
651 | * report percentage battery remaining capacity directly to OS. |
652 | * In this case, it reports the Last Full Charged Capacity == 100 |
653 | * and BatteryPresentRate == 0xFFFFFFFF. |
654 | * |
655 | * Now we found some battery reports percentage remaining capacity |
656 | * even if it's rechargeable. |
657 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 |
658 | * |
659 | * Handle this correctly so that they won't break userspace. |
660 | */ |
661 | static void acpi_battery_quirks(struct acpi_battery *battery) |
662 | { |
663 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
664 | return ; |
665 | |
666 | if (battery->full_charge_capacity == 100 && |
667 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && |
668 | battery->capacity_now >=0 && battery->capacity_now <= 100) { |
669 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
670 | battery->full_charge_capacity = battery->design_capacity; |
671 | battery->capacity_now = (battery->capacity_now * |
672 | battery->full_charge_capacity) / 100; |
673 | } |
674 | |
675 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) |
676 | return ; |
677 | |
678 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { |
679 | const char *s; |
680 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); |
681 | if (s && !strnicmp(s, "ThinkPad", 8)) { |
682 | dmi_walk(find_battery, battery); |
683 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, |
684 | &battery->flags) && |
685 | battery->design_voltage) { |
686 | battery->design_capacity = |
687 | battery->design_capacity * |
688 | 10000 / battery->design_voltage; |
689 | battery->full_charge_capacity = |
690 | battery->full_charge_capacity * |
691 | 10000 / battery->design_voltage; |
692 | battery->design_capacity_warning = |
693 | battery->design_capacity_warning * |
694 | 10000 / battery->design_voltage; |
695 | battery->capacity_now = battery->capacity_now * |
696 | 10000 / battery->design_voltage; |
697 | } |
698 | } |
699 | } |
700 | } |
701 | |
702 | static int acpi_battery_update(struct acpi_battery *battery) |
703 | { |
704 | int result, old_present = acpi_battery_present(battery); |
705 | result = acpi_battery_get_status(battery); |
706 | if (result) |
707 | return result; |
708 | if (!acpi_battery_present(battery)) { |
709 | sysfs_remove_battery(battery); |
710 | battery->update_time = 0; |
711 | return 0; |
712 | } |
713 | if (!battery->update_time || |
714 | old_present != acpi_battery_present(battery)) { |
715 | result = acpi_battery_get_info(battery); |
716 | if (result) |
717 | return result; |
718 | acpi_battery_init_alarm(battery); |
719 | } |
720 | if (!battery->bat.dev) { |
721 | result = sysfs_add_battery(battery); |
722 | if (result) |
723 | return result; |
724 | } |
725 | result = acpi_battery_get_state(battery); |
726 | acpi_battery_quirks(battery); |
727 | return result; |
728 | } |
729 | |
730 | static void acpi_battery_refresh(struct acpi_battery *battery) |
731 | { |
732 | int power_unit; |
733 | |
734 | if (!battery->bat.dev) |
735 | return; |
736 | |
737 | power_unit = battery->power_unit; |
738 | |
739 | acpi_battery_get_info(battery); |
740 | |
741 | if (power_unit == battery->power_unit) |
742 | return; |
743 | |
744 | /* The battery has changed its reporting units. */ |
745 | sysfs_remove_battery(battery); |
746 | sysfs_add_battery(battery); |
747 | } |
748 | |
749 | /* -------------------------------------------------------------------------- |
750 | FS Interface (/proc) |
751 | -------------------------------------------------------------------------- */ |
752 | |
753 | #ifdef CONFIG_ACPI_PROCFS_POWER |
754 | static struct proc_dir_entry *acpi_battery_dir; |
755 | |
756 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
757 | { |
758 | struct acpi_battery *battery = seq->private; |
759 | |
760 | if (result) |
761 | goto end; |
762 | |
763 | seq_printf(seq, "present: %s\n", |
764 | acpi_battery_present(battery)?"yes":"no"); |
765 | if (!acpi_battery_present(battery)) |
766 | goto end; |
767 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
768 | seq_printf(seq, "design capacity: unknown\n"); |
769 | else |
770 | seq_printf(seq, "design capacity: %d %sh\n", |
771 | battery->design_capacity, |
772 | acpi_battery_units(battery)); |
773 | |
774 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
775 | seq_printf(seq, "last full capacity: unknown\n"); |
776 | else |
777 | seq_printf(seq, "last full capacity: %d %sh\n", |
778 | battery->full_charge_capacity, |
779 | acpi_battery_units(battery)); |
780 | |
781 | seq_printf(seq, "battery technology: %srechargeable\n", |
782 | (!battery->technology)?"non-":""); |
783 | |
784 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
785 | seq_printf(seq, "design voltage: unknown\n"); |
786 | else |
787 | seq_printf(seq, "design voltage: %d mV\n", |
788 | battery->design_voltage); |
789 | seq_printf(seq, "design capacity warning: %d %sh\n", |
790 | battery->design_capacity_warning, |
791 | acpi_battery_units(battery)); |
792 | seq_printf(seq, "design capacity low: %d %sh\n", |
793 | battery->design_capacity_low, |
794 | acpi_battery_units(battery)); |
795 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); |
796 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
797 | battery->capacity_granularity_1, |
798 | acpi_battery_units(battery)); |
799 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
800 | battery->capacity_granularity_2, |
801 | acpi_battery_units(battery)); |
802 | seq_printf(seq, "model number: %s\n", battery->model_number); |
803 | seq_printf(seq, "serial number: %s\n", battery->serial_number); |
804 | seq_printf(seq, "battery type: %s\n", battery->type); |
805 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); |
806 | end: |
807 | if (result) |
808 | seq_printf(seq, "ERROR: Unable to read battery info\n"); |
809 | return result; |
810 | } |
811 | |
812 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
813 | { |
814 | struct acpi_battery *battery = seq->private; |
815 | |
816 | if (result) |
817 | goto end; |
818 | |
819 | seq_printf(seq, "present: %s\n", |
820 | acpi_battery_present(battery)?"yes":"no"); |
821 | if (!acpi_battery_present(battery)) |
822 | goto end; |
823 | |
824 | seq_printf(seq, "capacity state: %s\n", |
825 | (battery->state & 0x04)?"critical":"ok"); |
826 | if ((battery->state & 0x01) && (battery->state & 0x02)) |
827 | seq_printf(seq, |
828 | "charging state: charging/discharging\n"); |
829 | else if (battery->state & 0x01) |
830 | seq_printf(seq, "charging state: discharging\n"); |
831 | else if (battery->state & 0x02) |
832 | seq_printf(seq, "charging state: charging\n"); |
833 | else |
834 | seq_printf(seq, "charging state: charged\n"); |
835 | |
836 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
837 | seq_printf(seq, "present rate: unknown\n"); |
838 | else |
839 | seq_printf(seq, "present rate: %d %s\n", |
840 | battery->rate_now, acpi_battery_units(battery)); |
841 | |
842 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
843 | seq_printf(seq, "remaining capacity: unknown\n"); |
844 | else |
845 | seq_printf(seq, "remaining capacity: %d %sh\n", |
846 | battery->capacity_now, acpi_battery_units(battery)); |
847 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
848 | seq_printf(seq, "present voltage: unknown\n"); |
849 | else |
850 | seq_printf(seq, "present voltage: %d mV\n", |
851 | battery->voltage_now); |
852 | end: |
853 | if (result) |
854 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
855 | |
856 | return result; |
857 | } |
858 | |
859 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
860 | { |
861 | struct acpi_battery *battery = seq->private; |
862 | |
863 | if (result) |
864 | goto end; |
865 | |
866 | if (!acpi_battery_present(battery)) { |
867 | seq_printf(seq, "present: no\n"); |
868 | goto end; |
869 | } |
870 | seq_printf(seq, "alarm: "); |
871 | if (!battery->alarm) |
872 | seq_printf(seq, "unsupported\n"); |
873 | else |
874 | seq_printf(seq, "%u %sh\n", battery->alarm, |
875 | acpi_battery_units(battery)); |
876 | end: |
877 | if (result) |
878 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); |
879 | return result; |
880 | } |
881 | |
882 | static ssize_t acpi_battery_write_alarm(struct file *file, |
883 | const char __user * buffer, |
884 | size_t count, loff_t * ppos) |
885 | { |
886 | int result = 0; |
887 | char alarm_string[12] = { '\0' }; |
888 | struct seq_file *m = file->private_data; |
889 | struct acpi_battery *battery = m->private; |
890 | |
891 | if (!battery || (count > sizeof(alarm_string) - 1)) |
892 | return -EINVAL; |
893 | if (!acpi_battery_present(battery)) { |
894 | result = -ENODEV; |
895 | goto end; |
896 | } |
897 | if (copy_from_user(alarm_string, buffer, count)) { |
898 | result = -EFAULT; |
899 | goto end; |
900 | } |
901 | alarm_string[count] = '\0'; |
902 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
903 | result = acpi_battery_set_alarm(battery); |
904 | end: |
905 | if (!result) |
906 | return count; |
907 | return result; |
908 | } |
909 | |
910 | typedef int(*print_func)(struct seq_file *seq, int result); |
911 | |
912 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { |
913 | acpi_battery_print_info, |
914 | acpi_battery_print_state, |
915 | acpi_battery_print_alarm, |
916 | }; |
917 | |
918 | static int acpi_battery_read(int fid, struct seq_file *seq) |
919 | { |
920 | struct acpi_battery *battery = seq->private; |
921 | int result = acpi_battery_update(battery); |
922 | return acpi_print_funcs[fid](seq, result); |
923 | } |
924 | |
925 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
926 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ |
927 | { \ |
928 | return acpi_battery_read(_name##_tag, seq); \ |
929 | } \ |
930 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ |
931 | { \ |
932 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ |
933 | } |
934 | |
935 | DECLARE_FILE_FUNCTIONS(info); |
936 | DECLARE_FILE_FUNCTIONS(state); |
937 | DECLARE_FILE_FUNCTIONS(alarm); |
938 | |
939 | #undef DECLARE_FILE_FUNCTIONS |
940 | |
941 | #define FILE_DESCRIPTION_RO(_name) \ |
942 | { \ |
943 | .name = __stringify(_name), \ |
944 | .mode = S_IRUGO, \ |
945 | .ops = { \ |
946 | .open = acpi_battery_##_name##_open_fs, \ |
947 | .read = seq_read, \ |
948 | .llseek = seq_lseek, \ |
949 | .release = single_release, \ |
950 | .owner = THIS_MODULE, \ |
951 | }, \ |
952 | } |
953 | |
954 | #define FILE_DESCRIPTION_RW(_name) \ |
955 | { \ |
956 | .name = __stringify(_name), \ |
957 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ |
958 | .ops = { \ |
959 | .open = acpi_battery_##_name##_open_fs, \ |
960 | .read = seq_read, \ |
961 | .llseek = seq_lseek, \ |
962 | .write = acpi_battery_write_##_name, \ |
963 | .release = single_release, \ |
964 | .owner = THIS_MODULE, \ |
965 | }, \ |
966 | } |
967 | |
968 | static const struct battery_file { |
969 | struct file_operations ops; |
970 | umode_t mode; |
971 | const char *name; |
972 | } acpi_battery_file[] = { |
973 | FILE_DESCRIPTION_RO(info), |
974 | FILE_DESCRIPTION_RO(state), |
975 | FILE_DESCRIPTION_RW(alarm), |
976 | }; |
977 | |
978 | #undef FILE_DESCRIPTION_RO |
979 | #undef FILE_DESCRIPTION_RW |
980 | |
981 | static int acpi_battery_add_fs(struct acpi_device *device) |
982 | { |
983 | struct proc_dir_entry *entry = NULL; |
984 | int i; |
985 | |
986 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded," |
987 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); |
988 | if (!acpi_device_dir(device)) { |
989 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
990 | acpi_battery_dir); |
991 | if (!acpi_device_dir(device)) |
992 | return -ENODEV; |
993 | } |
994 | |
995 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
996 | entry = proc_create_data(acpi_battery_file[i].name, |
997 | acpi_battery_file[i].mode, |
998 | acpi_device_dir(device), |
999 | &acpi_battery_file[i].ops, |
1000 | acpi_driver_data(device)); |
1001 | if (!entry) |
1002 | return -ENODEV; |
1003 | } |
1004 | return 0; |
1005 | } |
1006 | |
1007 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1008 | { |
1009 | int i; |
1010 | if (!acpi_device_dir(device)) |
1011 | return; |
1012 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) |
1013 | remove_proc_entry(acpi_battery_file[i].name, |
1014 | acpi_device_dir(device)); |
1015 | |
1016 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
1017 | acpi_device_dir(device) = NULL; |
1018 | } |
1019 | |
1020 | #endif |
1021 | |
1022 | /* -------------------------------------------------------------------------- |
1023 | Driver Interface |
1024 | -------------------------------------------------------------------------- */ |
1025 | |
1026 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1027 | { |
1028 | struct acpi_battery *battery = acpi_driver_data(device); |
1029 | struct device *old; |
1030 | |
1031 | if (!battery) |
1032 | return; |
1033 | old = battery->bat.dev; |
1034 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
1035 | acpi_battery_refresh(battery); |
1036 | acpi_battery_update(battery); |
1037 | acpi_bus_generate_proc_event(device, event, |
1038 | acpi_battery_present(battery)); |
1039 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1040 | dev_name(&device->dev), event, |
1041 | acpi_battery_present(battery)); |
1042 | /* acpi_battery_update could remove power_supply object */ |
1043 | if (old && battery->bat.dev) |
1044 | power_supply_changed(&battery->bat); |
1045 | } |
1046 | |
1047 | static int battery_notify(struct notifier_block *nb, |
1048 | unsigned long mode, void *_unused) |
1049 | { |
1050 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, |
1051 | pm_nb); |
1052 | switch (mode) { |
1053 | case PM_POST_HIBERNATION: |
1054 | case PM_POST_SUSPEND: |
1055 | if (battery->bat.dev) { |
1056 | sysfs_remove_battery(battery); |
1057 | sysfs_add_battery(battery); |
1058 | } |
1059 | break; |
1060 | } |
1061 | |
1062 | return 0; |
1063 | } |
1064 | |
1065 | static int acpi_battery_add(struct acpi_device *device) |
1066 | { |
1067 | int result = 0; |
1068 | struct acpi_battery *battery = NULL; |
1069 | acpi_handle handle; |
1070 | if (!device) |
1071 | return -EINVAL; |
1072 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1073 | if (!battery) |
1074 | return -ENOMEM; |
1075 | battery->device = device; |
1076 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
1077 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); |
1078 | device->driver_data = battery; |
1079 | mutex_init(&battery->lock); |
1080 | mutex_init(&battery->sysfs_lock); |
1081 | if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle, |
1082 | "_BIX", &handle))) |
1083 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
1084 | result = acpi_battery_update(battery); |
1085 | if (result) |
1086 | goto fail; |
1087 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1088 | result = acpi_battery_add_fs(device); |
1089 | #endif |
1090 | if (result) { |
1091 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1092 | acpi_battery_remove_fs(device); |
1093 | #endif |
1094 | goto fail; |
1095 | } |
1096 | |
1097 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
1098 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
1099 | device->status.battery_present ? "present" : "absent"); |
1100 | |
1101 | battery->pm_nb.notifier_call = battery_notify; |
1102 | register_pm_notifier(&battery->pm_nb); |
1103 | |
1104 | return result; |
1105 | |
1106 | fail: |
1107 | sysfs_remove_battery(battery); |
1108 | mutex_destroy(&battery->lock); |
1109 | mutex_destroy(&battery->sysfs_lock); |
1110 | kfree(battery); |
1111 | return result; |
1112 | } |
1113 | |
1114 | static int acpi_battery_remove(struct acpi_device *device) |
1115 | { |
1116 | struct acpi_battery *battery = NULL; |
1117 | |
1118 | if (!device || !acpi_driver_data(device)) |
1119 | return -EINVAL; |
1120 | battery = acpi_driver_data(device); |
1121 | unregister_pm_notifier(&battery->pm_nb); |
1122 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1123 | acpi_battery_remove_fs(device); |
1124 | #endif |
1125 | sysfs_remove_battery(battery); |
1126 | mutex_destroy(&battery->lock); |
1127 | mutex_destroy(&battery->sysfs_lock); |
1128 | kfree(battery); |
1129 | return 0; |
1130 | } |
1131 | |
1132 | #ifdef CONFIG_PM_SLEEP |
1133 | /* this is needed to learn about changes made in suspended state */ |
1134 | static int acpi_battery_resume(struct device *dev) |
1135 | { |
1136 | struct acpi_battery *battery; |
1137 | |
1138 | if (!dev) |
1139 | return -EINVAL; |
1140 | |
1141 | battery = acpi_driver_data(to_acpi_device(dev)); |
1142 | if (!battery) |
1143 | return -EINVAL; |
1144 | |
1145 | battery->update_time = 0; |
1146 | acpi_battery_update(battery); |
1147 | return 0; |
1148 | } |
1149 | #endif |
1150 | |
1151 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
1152 | |
1153 | static struct acpi_driver acpi_battery_driver = { |
1154 | .name = "battery", |
1155 | .class = ACPI_BATTERY_CLASS, |
1156 | .ids = battery_device_ids, |
1157 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
1158 | .ops = { |
1159 | .add = acpi_battery_add, |
1160 | .remove = acpi_battery_remove, |
1161 | .notify = acpi_battery_notify, |
1162 | }, |
1163 | .drv.pm = &acpi_battery_pm, |
1164 | }; |
1165 | |
1166 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1167 | { |
1168 | if (acpi_disabled) |
1169 | return; |
1170 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1171 | acpi_battery_dir = acpi_lock_battery_dir(); |
1172 | if (!acpi_battery_dir) |
1173 | return; |
1174 | #endif |
1175 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
1176 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1177 | acpi_unlock_battery_dir(acpi_battery_dir); |
1178 | #endif |
1179 | return; |
1180 | } |
1181 | return; |
1182 | } |
1183 | |
1184 | static int __init acpi_battery_init(void) |
1185 | { |
1186 | async_schedule(acpi_battery_init_async, NULL); |
1187 | return 0; |
1188 | } |
1189 | |
1190 | static void __exit acpi_battery_exit(void) |
1191 | { |
1192 | acpi_bus_unregister_driver(&acpi_battery_driver); |
1193 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1194 | acpi_unlock_battery_dir(acpi_battery_dir); |
1195 | #endif |
1196 | } |
1197 | |
1198 | module_init(acpi_battery_init); |
1199 | module_exit(acpi_battery_exit); |
1200 |
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