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24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/types.h>
28#include <linux/jiffies.h>
29#include <linux/async.h>
30#include <linux/dmi.h>
31#include <linux/delay.h>
32#include <linux/slab.h>
33#include <linux/suspend.h>
34#include <asm/unaligned.h>
35
36#ifdef CONFIG_ACPI_PROCFS_POWER
37#include <linux/proc_fs.h>
38#include <linux/seq_file.h>
39#include <asm/uaccess.h>
40#endif
41
42#include <linux/acpi.h>
43#include <linux/power_supply.h>
44
45#include "battery.h"
46
47#define PREFIX "ACPI: "
48
49#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
50
51#define ACPI_BATTERY_DEVICE_NAME "Battery"
52
53
54#define ACPI_BATTERY_POWER_UNIT_MA 1
55
56#define ACPI_BATTERY_STATE_DISCHARGING 0x1
57#define ACPI_BATTERY_STATE_CHARGING 0x2
58#define ACPI_BATTERY_STATE_CRITICAL 0x4
59
60#define _COMPONENT ACPI_BATTERY_COMPONENT
61
62ACPI_MODULE_NAME("battery");
63
64MODULE_AUTHOR("Paul Diefenbaugh");
65MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
66MODULE_DESCRIPTION("ACPI Battery Driver");
67MODULE_LICENSE("GPL");
68
69static async_cookie_t async_cookie;
70static int battery_bix_broken_package;
71static int battery_notification_delay_ms;
72static unsigned int cache_time = 1000;
73module_param(cache_time, uint, 0644);
74MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
75
76#ifdef CONFIG_ACPI_PROCFS_POWER
77extern struct proc_dir_entry *acpi_lock_battery_dir(void);
78extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
79
80enum acpi_battery_files {
81 info_tag = 0,
82 state_tag,
83 alarm_tag,
84 ACPI_BATTERY_NUMFILES,
85};
86
87#endif
88
89static const struct acpi_device_id battery_device_ids[] = {
90 {"PNP0C0A", 0},
91 {"", 0},
92};
93
94MODULE_DEVICE_TABLE(acpi, battery_device_ids);
95
96enum {
97 ACPI_BATTERY_ALARM_PRESENT,
98 ACPI_BATTERY_XINFO_PRESENT,
99 ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
100
101
102
103
104
105
106
107
108
109
110
111 ACPI_BATTERY_QUIRK_THINKPAD_MAH,
112};
113
114struct acpi_battery {
115 struct mutex lock;
116 struct mutex sysfs_lock;
117 struct power_supply *bat;
118 struct power_supply_desc bat_desc;
119 struct acpi_device *device;
120 struct notifier_block pm_nb;
121 unsigned long update_time;
122 int revision;
123 int rate_now;
124 int capacity_now;
125 int voltage_now;
126 int design_capacity;
127 int full_charge_capacity;
128 int technology;
129 int design_voltage;
130 int design_capacity_warning;
131 int design_capacity_low;
132 int cycle_count;
133 int measurement_accuracy;
134 int max_sampling_time;
135 int min_sampling_time;
136 int max_averaging_interval;
137 int min_averaging_interval;
138 int capacity_granularity_1;
139 int capacity_granularity_2;
140 int alarm;
141 char model_number[32];
142 char serial_number[32];
143 char type[32];
144 char oem_info[32];
145 int state;
146 int power_unit;
147 unsigned long flags;
148};
149
150#define to_acpi_battery(x) power_supply_get_drvdata(x)
151
152static inline int acpi_battery_present(struct acpi_battery *battery)
153{
154 return battery->device->status.battery_present;
155}
156
157static int acpi_battery_technology(struct acpi_battery *battery)
158{
159 if (!strcasecmp("NiCd", battery->type))
160 return POWER_SUPPLY_TECHNOLOGY_NiCd;
161 if (!strcasecmp("NiMH", battery->type))
162 return POWER_SUPPLY_TECHNOLOGY_NiMH;
163 if (!strcasecmp("LION", battery->type))
164 return POWER_SUPPLY_TECHNOLOGY_LION;
165 if (!strncasecmp("LI-ION", battery->type, 6))
166 return POWER_SUPPLY_TECHNOLOGY_LION;
167 if (!strcasecmp("LiP", battery->type))
168 return POWER_SUPPLY_TECHNOLOGY_LIPO;
169 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
170}
171
172static int acpi_battery_get_state(struct acpi_battery *battery);
173
174static int acpi_battery_is_charged(struct acpi_battery *battery)
175{
176
177 if (battery->state != 0)
178 return 0;
179
180
181 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
182 battery->capacity_now == 0)
183 return 0;
184
185
186 if (battery->full_charge_capacity == battery->capacity_now)
187 return 1;
188
189
190 if (battery->design_capacity == battery->capacity_now)
191 return 1;
192
193
194 return 0;
195}
196
197static int acpi_battery_get_property(struct power_supply *psy,
198 enum power_supply_property psp,
199 union power_supply_propval *val)
200{
201 int ret = 0;
202 struct acpi_battery *battery = to_acpi_battery(psy);
203
204 if (acpi_battery_present(battery)) {
205
206 acpi_battery_get_state(battery);
207 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
208 return -ENODEV;
209 switch (psp) {
210 case POWER_SUPPLY_PROP_STATUS:
211 if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
212 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
213 else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
214 val->intval = POWER_SUPPLY_STATUS_CHARGING;
215 else if (acpi_battery_is_charged(battery))
216 val->intval = POWER_SUPPLY_STATUS_FULL;
217 else
218 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
219 break;
220 case POWER_SUPPLY_PROP_PRESENT:
221 val->intval = acpi_battery_present(battery);
222 break;
223 case POWER_SUPPLY_PROP_TECHNOLOGY:
224 val->intval = acpi_battery_technology(battery);
225 break;
226 case POWER_SUPPLY_PROP_CYCLE_COUNT:
227 val->intval = battery->cycle_count;
228 break;
229 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
230 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
231 ret = -ENODEV;
232 else
233 val->intval = battery->design_voltage * 1000;
234 break;
235 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
236 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
237 ret = -ENODEV;
238 else
239 val->intval = battery->voltage_now * 1000;
240 break;
241 case POWER_SUPPLY_PROP_CURRENT_NOW:
242 case POWER_SUPPLY_PROP_POWER_NOW:
243 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
244 ret = -ENODEV;
245 else
246 val->intval = battery->rate_now * 1000;
247 break;
248 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
249 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
250 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
251 ret = -ENODEV;
252 else
253 val->intval = battery->design_capacity * 1000;
254 break;
255 case POWER_SUPPLY_PROP_CHARGE_FULL:
256 case POWER_SUPPLY_PROP_ENERGY_FULL:
257 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
258 ret = -ENODEV;
259 else
260 val->intval = battery->full_charge_capacity * 1000;
261 break;
262 case POWER_SUPPLY_PROP_CHARGE_NOW:
263 case POWER_SUPPLY_PROP_ENERGY_NOW:
264 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
265 ret = -ENODEV;
266 else
267 val->intval = battery->capacity_now * 1000;
268 break;
269 case POWER_SUPPLY_PROP_CAPACITY:
270 if (battery->capacity_now && battery->full_charge_capacity)
271 val->intval = battery->capacity_now * 100/
272 battery->full_charge_capacity;
273 else
274 val->intval = 0;
275 break;
276 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
277 if (battery->state & ACPI_BATTERY_STATE_CRITICAL)
278 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
279 else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
280 (battery->capacity_now <= battery->alarm))
281 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
282 else if (acpi_battery_is_charged(battery))
283 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
284 else
285 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
286 break;
287 case POWER_SUPPLY_PROP_MODEL_NAME:
288 val->strval = battery->model_number;
289 break;
290 case POWER_SUPPLY_PROP_MANUFACTURER:
291 val->strval = battery->oem_info;
292 break;
293 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
294 val->strval = battery->serial_number;
295 break;
296 default:
297 ret = -EINVAL;
298 }
299 return ret;
300}
301
302static enum power_supply_property charge_battery_props[] = {
303 POWER_SUPPLY_PROP_STATUS,
304 POWER_SUPPLY_PROP_PRESENT,
305 POWER_SUPPLY_PROP_TECHNOLOGY,
306 POWER_SUPPLY_PROP_CYCLE_COUNT,
307 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
308 POWER_SUPPLY_PROP_VOLTAGE_NOW,
309 POWER_SUPPLY_PROP_CURRENT_NOW,
310 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
311 POWER_SUPPLY_PROP_CHARGE_FULL,
312 POWER_SUPPLY_PROP_CHARGE_NOW,
313 POWER_SUPPLY_PROP_CAPACITY,
314 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
315 POWER_SUPPLY_PROP_MODEL_NAME,
316 POWER_SUPPLY_PROP_MANUFACTURER,
317 POWER_SUPPLY_PROP_SERIAL_NUMBER,
318};
319
320static enum power_supply_property energy_battery_props[] = {
321 POWER_SUPPLY_PROP_STATUS,
322 POWER_SUPPLY_PROP_PRESENT,
323 POWER_SUPPLY_PROP_TECHNOLOGY,
324 POWER_SUPPLY_PROP_CYCLE_COUNT,
325 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
326 POWER_SUPPLY_PROP_VOLTAGE_NOW,
327 POWER_SUPPLY_PROP_POWER_NOW,
328 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
329 POWER_SUPPLY_PROP_ENERGY_FULL,
330 POWER_SUPPLY_PROP_ENERGY_NOW,
331 POWER_SUPPLY_PROP_CAPACITY,
332 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
333 POWER_SUPPLY_PROP_MODEL_NAME,
334 POWER_SUPPLY_PROP_MANUFACTURER,
335 POWER_SUPPLY_PROP_SERIAL_NUMBER,
336};
337
338
339
340
341struct acpi_offsets {
342 size_t offset;
343 u8 mode;
344};
345
346static const struct acpi_offsets state_offsets[] = {
347 {offsetof(struct acpi_battery, state), 0},
348 {offsetof(struct acpi_battery, rate_now), 0},
349 {offsetof(struct acpi_battery, capacity_now), 0},
350 {offsetof(struct acpi_battery, voltage_now), 0},
351};
352
353static const struct acpi_offsets info_offsets[] = {
354 {offsetof(struct acpi_battery, power_unit), 0},
355 {offsetof(struct acpi_battery, design_capacity), 0},
356 {offsetof(struct acpi_battery, full_charge_capacity), 0},
357 {offsetof(struct acpi_battery, technology), 0},
358 {offsetof(struct acpi_battery, design_voltage), 0},
359 {offsetof(struct acpi_battery, design_capacity_warning), 0},
360 {offsetof(struct acpi_battery, design_capacity_low), 0},
361 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
362 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
363 {offsetof(struct acpi_battery, model_number), 1},
364 {offsetof(struct acpi_battery, serial_number), 1},
365 {offsetof(struct acpi_battery, type), 1},
366 {offsetof(struct acpi_battery, oem_info), 1},
367};
368
369static const struct acpi_offsets extended_info_offsets[] = {
370 {offsetof(struct acpi_battery, revision), 0},
371 {offsetof(struct acpi_battery, power_unit), 0},
372 {offsetof(struct acpi_battery, design_capacity), 0},
373 {offsetof(struct acpi_battery, full_charge_capacity), 0},
374 {offsetof(struct acpi_battery, technology), 0},
375 {offsetof(struct acpi_battery, design_voltage), 0},
376 {offsetof(struct acpi_battery, design_capacity_warning), 0},
377 {offsetof(struct acpi_battery, design_capacity_low), 0},
378 {offsetof(struct acpi_battery, cycle_count), 0},
379 {offsetof(struct acpi_battery, measurement_accuracy), 0},
380 {offsetof(struct acpi_battery, max_sampling_time), 0},
381 {offsetof(struct acpi_battery, min_sampling_time), 0},
382 {offsetof(struct acpi_battery, max_averaging_interval), 0},
383 {offsetof(struct acpi_battery, min_averaging_interval), 0},
384 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
385 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
386 {offsetof(struct acpi_battery, model_number), 1},
387 {offsetof(struct acpi_battery, serial_number), 1},
388 {offsetof(struct acpi_battery, type), 1},
389 {offsetof(struct acpi_battery, oem_info), 1},
390};
391
392static int extract_package(struct acpi_battery *battery,
393 union acpi_object *package,
394 const struct acpi_offsets *offsets, int num)
395{
396 int i;
397 union acpi_object *element;
398 if (package->type != ACPI_TYPE_PACKAGE)
399 return -EFAULT;
400 for (i = 0; i < num; ++i) {
401 if (package->package.count <= i)
402 return -EFAULT;
403 element = &package->package.elements[i];
404 if (offsets[i].mode) {
405 u8 *ptr = (u8 *)battery + offsets[i].offset;
406 if (element->type == ACPI_TYPE_STRING ||
407 element->type == ACPI_TYPE_BUFFER)
408 strncpy(ptr, element->string.pointer, 32);
409 else if (element->type == ACPI_TYPE_INTEGER) {
410 strncpy(ptr, (u8 *)&element->integer.value,
411 sizeof(u64));
412 ptr[sizeof(u64)] = 0;
413 } else
414 *ptr = 0;
415 } else {
416 int *x = (int *)((u8 *)battery + offsets[i].offset);
417 *x = (element->type == ACPI_TYPE_INTEGER) ?
418 element->integer.value : -1;
419 }
420 }
421 return 0;
422}
423
424static int acpi_battery_get_status(struct acpi_battery *battery)
425{
426 if (acpi_bus_get_status(battery->device)) {
427 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
428 return -ENODEV;
429 }
430 return 0;
431}
432
433static int acpi_battery_get_info(struct acpi_battery *battery)
434{
435 int result = -EFAULT;
436 acpi_status status = 0;
437 char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ?
438 "_BIX" : "_BIF";
439
440 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
441
442 if (!acpi_battery_present(battery))
443 return 0;
444 mutex_lock(&battery->lock);
445 status = acpi_evaluate_object(battery->device->handle, name,
446 NULL, &buffer);
447 mutex_unlock(&battery->lock);
448
449 if (ACPI_FAILURE(status)) {
450 ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name));
451 return -ENODEV;
452 }
453
454 if (battery_bix_broken_package)
455 result = extract_package(battery, buffer.pointer,
456 extended_info_offsets + 1,
457 ARRAY_SIZE(extended_info_offsets) - 1);
458 else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags))
459 result = extract_package(battery, buffer.pointer,
460 extended_info_offsets,
461 ARRAY_SIZE(extended_info_offsets));
462 else
463 result = extract_package(battery, buffer.pointer,
464 info_offsets, ARRAY_SIZE(info_offsets));
465 kfree(buffer.pointer);
466 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
467 battery->full_charge_capacity = battery->design_capacity;
468 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
469 battery->power_unit && battery->design_voltage) {
470 battery->design_capacity = battery->design_capacity *
471 10000 / battery->design_voltage;
472 battery->full_charge_capacity = battery->full_charge_capacity *
473 10000 / battery->design_voltage;
474 battery->design_capacity_warning =
475 battery->design_capacity_warning *
476 10000 / battery->design_voltage;
477
478
479
480
481
482 }
483 return result;
484}
485
486static int acpi_battery_get_state(struct acpi_battery *battery)
487{
488 int result = 0;
489 acpi_status status = 0;
490 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
491
492 if (!acpi_battery_present(battery))
493 return 0;
494
495 if (battery->update_time &&
496 time_before(jiffies, battery->update_time +
497 msecs_to_jiffies(cache_time)))
498 return 0;
499
500 mutex_lock(&battery->lock);
501 status = acpi_evaluate_object(battery->device->handle, "_BST",
502 NULL, &buffer);
503 mutex_unlock(&battery->lock);
504
505 if (ACPI_FAILURE(status)) {
506 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
507 return -ENODEV;
508 }
509
510 result = extract_package(battery, buffer.pointer,
511 state_offsets, ARRAY_SIZE(state_offsets));
512 battery->update_time = jiffies;
513 kfree(buffer.pointer);
514
515
516
517
518
519 if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA &&
520 battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN &&
521 (s16)(battery->rate_now) < 0) {
522 battery->rate_now = abs((s16)battery->rate_now);
523 printk_once(KERN_WARNING FW_BUG
524 "battery: (dis)charge rate invalid.\n");
525 }
526
527 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
528 && battery->capacity_now >= 0 && battery->capacity_now <= 100)
529 battery->capacity_now = (battery->capacity_now *
530 battery->full_charge_capacity) / 100;
531 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
532 battery->power_unit && battery->design_voltage) {
533 battery->capacity_now = battery->capacity_now *
534 10000 / battery->design_voltage;
535 }
536 return result;
537}
538
539static int acpi_battery_set_alarm(struct acpi_battery *battery)
540{
541 acpi_status status = 0;
542
543 if (!acpi_battery_present(battery) ||
544 !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
545 return -ENODEV;
546
547 mutex_lock(&battery->lock);
548 status = acpi_execute_simple_method(battery->device->handle, "_BTP",
549 battery->alarm);
550 mutex_unlock(&battery->lock);
551
552 if (ACPI_FAILURE(status))
553 return -ENODEV;
554
555 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
556 return 0;
557}
558
559static int acpi_battery_init_alarm(struct acpi_battery *battery)
560{
561
562 if (!acpi_has_method(battery->device->handle, "_BTP")) {
563 clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
564 return 0;
565 }
566 set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
567 if (!battery->alarm)
568 battery->alarm = battery->design_capacity_warning;
569 return acpi_battery_set_alarm(battery);
570}
571
572static ssize_t acpi_battery_alarm_show(struct device *dev,
573 struct device_attribute *attr,
574 char *buf)
575{
576 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
577 return sprintf(buf, "%d\n", battery->alarm * 1000);
578}
579
580static ssize_t acpi_battery_alarm_store(struct device *dev,
581 struct device_attribute *attr,
582 const char *buf, size_t count)
583{
584 unsigned long x;
585 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
586 if (sscanf(buf, "%lu\n", &x) == 1)
587 battery->alarm = x/1000;
588 if (acpi_battery_present(battery))
589 acpi_battery_set_alarm(battery);
590 return count;
591}
592
593static struct device_attribute alarm_attr = {
594 .attr = {.name = "alarm", .mode = 0644},
595 .show = acpi_battery_alarm_show,
596 .store = acpi_battery_alarm_store,
597};
598
599static int sysfs_add_battery(struct acpi_battery *battery)
600{
601 struct power_supply_config psy_cfg = { .drv_data = battery, };
602
603 if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
604 battery->bat_desc.properties = charge_battery_props;
605 battery->bat_desc.num_properties =
606 ARRAY_SIZE(charge_battery_props);
607 } else {
608 battery->bat_desc.properties = energy_battery_props;
609 battery->bat_desc.num_properties =
610 ARRAY_SIZE(energy_battery_props);
611 }
612
613 battery->bat_desc.name = acpi_device_bid(battery->device);
614 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
615 battery->bat_desc.get_property = acpi_battery_get_property;
616
617 battery->bat = power_supply_register_no_ws(&battery->device->dev,
618 &battery->bat_desc, &psy_cfg);
619
620 if (IS_ERR(battery->bat)) {
621 int result = PTR_ERR(battery->bat);
622
623 battery->bat = NULL;
624 return result;
625 }
626 return device_create_file(&battery->bat->dev, &alarm_attr);
627}
628
629static void sysfs_remove_battery(struct acpi_battery *battery)
630{
631 mutex_lock(&battery->sysfs_lock);
632 if (!battery->bat) {
633 mutex_unlock(&battery->sysfs_lock);
634 return;
635 }
636
637 device_remove_file(&battery->bat->dev, &alarm_attr);
638 power_supply_unregister(battery->bat);
639 battery->bat = NULL;
640 mutex_unlock(&battery->sysfs_lock);
641}
642
643static void find_battery(const struct dmi_header *dm, void *private)
644{
645 struct acpi_battery *battery = (struct acpi_battery *)private;
646
647
648 if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) {
649 const u8 *dmi_data = (const u8 *)(dm + 1);
650 int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6));
651 if (dm->length >= 18)
652 dmi_capacity *= dmi_data[17];
653 if (battery->design_capacity * battery->design_voltage / 1000
654 != dmi_capacity &&
655 battery->design_capacity * 10 == dmi_capacity)
656 set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
657 &battery->flags);
658 }
659}
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671
672
673static void acpi_battery_quirks(struct acpi_battery *battery)
674{
675 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
676 return;
677
678 if (battery->full_charge_capacity == 100 &&
679 battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN &&
680 battery->capacity_now >= 0 && battery->capacity_now <= 100) {
681 set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags);
682 battery->full_charge_capacity = battery->design_capacity;
683 battery->capacity_now = (battery->capacity_now *
684 battery->full_charge_capacity) / 100;
685 }
686
687 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags))
688 return;
689
690 if (battery->power_unit && dmi_name_in_vendors("LENOVO")) {
691 const char *s;
692 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
693 if (s && !strncasecmp(s, "ThinkPad", 8)) {
694 dmi_walk(find_battery, battery);
695 if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
696 &battery->flags) &&
697 battery->design_voltage) {
698 battery->design_capacity =
699 battery->design_capacity *
700 10000 / battery->design_voltage;
701 battery->full_charge_capacity =
702 battery->full_charge_capacity *
703 10000 / battery->design_voltage;
704 battery->design_capacity_warning =
705 battery->design_capacity_warning *
706 10000 / battery->design_voltage;
707 battery->capacity_now = battery->capacity_now *
708 10000 / battery->design_voltage;
709 }
710 }
711 }
712}
713
714static int acpi_battery_update(struct acpi_battery *battery, bool resume)
715{
716 int result, old_present = acpi_battery_present(battery);
717 result = acpi_battery_get_status(battery);
718 if (result)
719 return result;
720 if (!acpi_battery_present(battery)) {
721 sysfs_remove_battery(battery);
722 battery->update_time = 0;
723 return 0;
724 }
725
726 if (resume)
727 return 0;
728
729 if (!battery->update_time ||
730 old_present != acpi_battery_present(battery)) {
731 result = acpi_battery_get_info(battery);
732 if (result)
733 return result;
734 acpi_battery_init_alarm(battery);
735 }
736 if (!battery->bat) {
737 result = sysfs_add_battery(battery);
738 if (result)
739 return result;
740 }
741 result = acpi_battery_get_state(battery);
742 if (result)
743 return result;
744 acpi_battery_quirks(battery);
745
746
747
748
749
750 if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) ||
751 (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
752 (battery->capacity_now <= battery->alarm)))
753 pm_wakeup_event(&battery->device->dev, 0);
754
755 return result;
756}
757
758static void acpi_battery_refresh(struct acpi_battery *battery)
759{
760 int power_unit;
761
762 if (!battery->bat)
763 return;
764
765 power_unit = battery->power_unit;
766
767 acpi_battery_get_info(battery);
768
769 if (power_unit == battery->power_unit)
770 return;
771
772
773 sysfs_remove_battery(battery);
774 sysfs_add_battery(battery);
775}
776
777
778
779
780
781#ifdef CONFIG_ACPI_PROCFS_POWER
782static struct proc_dir_entry *acpi_battery_dir;
783
784static const char *acpi_battery_units(const struct acpi_battery *battery)
785{
786 return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ?
787 "mA" : "mW";
788}
789
790static int acpi_battery_print_info(struct seq_file *seq, int result)
791{
792 struct acpi_battery *battery = seq->private;
793
794 if (result)
795 goto end;
796
797 seq_printf(seq, "present: %s\n",
798 acpi_battery_present(battery) ? "yes" : "no");
799 if (!acpi_battery_present(battery))
800 goto end;
801 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
802 seq_printf(seq, "design capacity: unknown\n");
803 else
804 seq_printf(seq, "design capacity: %d %sh\n",
805 battery->design_capacity,
806 acpi_battery_units(battery));
807
808 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
809 seq_printf(seq, "last full capacity: unknown\n");
810 else
811 seq_printf(seq, "last full capacity: %d %sh\n",
812 battery->full_charge_capacity,
813 acpi_battery_units(battery));
814
815 seq_printf(seq, "battery technology: %srechargeable\n",
816 (!battery->technology)?"non-":"");
817
818 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
819 seq_printf(seq, "design voltage: unknown\n");
820 else
821 seq_printf(seq, "design voltage: %d mV\n",
822 battery->design_voltage);
823 seq_printf(seq, "design capacity warning: %d %sh\n",
824 battery->design_capacity_warning,
825 acpi_battery_units(battery));
826 seq_printf(seq, "design capacity low: %d %sh\n",
827 battery->design_capacity_low,
828 acpi_battery_units(battery));
829 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
830 seq_printf(seq, "capacity granularity 1: %d %sh\n",
831 battery->capacity_granularity_1,
832 acpi_battery_units(battery));
833 seq_printf(seq, "capacity granularity 2: %d %sh\n",
834 battery->capacity_granularity_2,
835 acpi_battery_units(battery));
836 seq_printf(seq, "model number: %s\n", battery->model_number);
837 seq_printf(seq, "serial number: %s\n", battery->serial_number);
838 seq_printf(seq, "battery type: %s\n", battery->type);
839 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
840 end:
841 if (result)
842 seq_printf(seq, "ERROR: Unable to read battery info\n");
843 return result;
844}
845
846static int acpi_battery_print_state(struct seq_file *seq, int result)
847{
848 struct acpi_battery *battery = seq->private;
849
850 if (result)
851 goto end;
852
853 seq_printf(seq, "present: %s\n",
854 acpi_battery_present(battery) ? "yes" : "no");
855 if (!acpi_battery_present(battery))
856 goto end;
857
858 seq_printf(seq, "capacity state: %s\n",
859 (battery->state & 0x04) ? "critical" : "ok");
860 if ((battery->state & 0x01) && (battery->state & 0x02))
861 seq_printf(seq,
862 "charging state: charging/discharging\n");
863 else if (battery->state & 0x01)
864 seq_printf(seq, "charging state: discharging\n");
865 else if (battery->state & 0x02)
866 seq_printf(seq, "charging state: charging\n");
867 else
868 seq_printf(seq, "charging state: charged\n");
869
870 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
871 seq_printf(seq, "present rate: unknown\n");
872 else
873 seq_printf(seq, "present rate: %d %s\n",
874 battery->rate_now, acpi_battery_units(battery));
875
876 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
877 seq_printf(seq, "remaining capacity: unknown\n");
878 else
879 seq_printf(seq, "remaining capacity: %d %sh\n",
880 battery->capacity_now, acpi_battery_units(battery));
881 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
882 seq_printf(seq, "present voltage: unknown\n");
883 else
884 seq_printf(seq, "present voltage: %d mV\n",
885 battery->voltage_now);
886 end:
887 if (result)
888 seq_printf(seq, "ERROR: Unable to read battery state\n");
889
890 return result;
891}
892
893static int acpi_battery_print_alarm(struct seq_file *seq, int result)
894{
895 struct acpi_battery *battery = seq->private;
896
897 if (result)
898 goto end;
899
900 if (!acpi_battery_present(battery)) {
901 seq_printf(seq, "present: no\n");
902 goto end;
903 }
904 seq_printf(seq, "alarm: ");
905 if (!battery->alarm)
906 seq_printf(seq, "unsupported\n");
907 else
908 seq_printf(seq, "%u %sh\n", battery->alarm,
909 acpi_battery_units(battery));
910 end:
911 if (result)
912 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
913 return result;
914}
915
916static ssize_t acpi_battery_write_alarm(struct file *file,
917 const char __user * buffer,
918 size_t count, loff_t * ppos)
919{
920 int result = 0;
921 char alarm_string[12] = { '\0' };
922 struct seq_file *m = file->private_data;
923 struct acpi_battery *battery = m->private;
924
925 if (!battery || (count > sizeof(alarm_string) - 1))
926 return -EINVAL;
927 if (!acpi_battery_present(battery)) {
928 result = -ENODEV;
929 goto end;
930 }
931 if (copy_from_user(alarm_string, buffer, count)) {
932 result = -EFAULT;
933 goto end;
934 }
935 alarm_string[count] = '\0';
936 if (kstrtoint(alarm_string, 0, &battery->alarm)) {
937 result = -EINVAL;
938 goto end;
939 }
940 result = acpi_battery_set_alarm(battery);
941 end:
942 if (!result)
943 return count;
944 return result;
945}
946
947typedef int(*print_func)(struct seq_file *seq, int result);
948
949static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
950 acpi_battery_print_info,
951 acpi_battery_print_state,
952 acpi_battery_print_alarm,
953};
954
955static int acpi_battery_read(int fid, struct seq_file *seq)
956{
957 struct acpi_battery *battery = seq->private;
958 int result = acpi_battery_update(battery, false);
959 return acpi_print_funcs[fid](seq, result);
960}
961
962#define DECLARE_FILE_FUNCTIONS(_name) \
963static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
964{ \
965 return acpi_battery_read(_name##_tag, seq); \
966} \
967static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
968{ \
969 return single_open(file, acpi_battery_read_##_name, PDE_DATA(inode)); \
970}
971
972DECLARE_FILE_FUNCTIONS(info);
973DECLARE_FILE_FUNCTIONS(state);
974DECLARE_FILE_FUNCTIONS(alarm);
975
976#undef DECLARE_FILE_FUNCTIONS
977
978#define FILE_DESCRIPTION_RO(_name) \
979 { \
980 .name = __stringify(_name), \
981 .mode = S_IRUGO, \
982 .ops = { \
983 .open = acpi_battery_##_name##_open_fs, \
984 .read = seq_read, \
985 .llseek = seq_lseek, \
986 .release = single_release, \
987 .owner = THIS_MODULE, \
988 }, \
989 }
990
991#define FILE_DESCRIPTION_RW(_name) \
992 { \
993 .name = __stringify(_name), \
994 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
995 .ops = { \
996 .open = acpi_battery_##_name##_open_fs, \
997 .read = seq_read, \
998 .llseek = seq_lseek, \
999 .write = acpi_battery_write_##_name, \
1000 .release = single_release, \
1001 .owner = THIS_MODULE, \
1002 }, \
1003 }
1004
1005static const struct battery_file {
1006 struct file_operations ops;
1007 umode_t mode;
1008 const char *name;
1009} acpi_battery_file[] = {
1010 FILE_DESCRIPTION_RO(info),
1011 FILE_DESCRIPTION_RO(state),
1012 FILE_DESCRIPTION_RW(alarm),
1013};
1014
1015#undef FILE_DESCRIPTION_RO
1016#undef FILE_DESCRIPTION_RW
1017
1018static int acpi_battery_add_fs(struct acpi_device *device)
1019{
1020 struct proc_dir_entry *entry = NULL;
1021 int i;
1022
1023 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded,"
1024 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
1025 if (!acpi_device_dir(device)) {
1026 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1027 acpi_battery_dir);
1028 if (!acpi_device_dir(device))
1029 return -ENODEV;
1030 }
1031
1032 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
1033 entry = proc_create_data(acpi_battery_file[i].name,
1034 acpi_battery_file[i].mode,
1035 acpi_device_dir(device),
1036 &acpi_battery_file[i].ops,
1037 acpi_driver_data(device));
1038 if (!entry)
1039 return -ENODEV;
1040 }
1041 return 0;
1042}
1043
1044static void acpi_battery_remove_fs(struct acpi_device *device)
1045{
1046 int i;
1047 if (!acpi_device_dir(device))
1048 return;
1049 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
1050 remove_proc_entry(acpi_battery_file[i].name,
1051 acpi_device_dir(device));
1052
1053 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
1054 acpi_device_dir(device) = NULL;
1055}
1056
1057#endif
1058
1059
1060
1061
1062
1063static void acpi_battery_notify(struct acpi_device *device, u32 event)
1064{
1065 struct acpi_battery *battery = acpi_driver_data(device);
1066 struct power_supply *old;
1067
1068 if (!battery)
1069 return;
1070 old = battery->bat;
1071
1072
1073
1074
1075
1076
1077 if (battery_notification_delay_ms > 0)
1078 msleep(battery_notification_delay_ms);
1079 if (event == ACPI_BATTERY_NOTIFY_INFO)
1080 acpi_battery_refresh(battery);
1081 acpi_battery_update(battery, false);
1082 acpi_bus_generate_netlink_event(device->pnp.device_class,
1083 dev_name(&device->dev), event,
1084 acpi_battery_present(battery));
1085 acpi_notifier_call_chain(device, event, acpi_battery_present(battery));
1086
1087 if (old && battery->bat)
1088 power_supply_changed(battery->bat);
1089}
1090
1091static int battery_notify(struct notifier_block *nb,
1092 unsigned long mode, void *_unused)
1093{
1094 struct acpi_battery *battery = container_of(nb, struct acpi_battery,
1095 pm_nb);
1096 int result;
1097
1098 switch (mode) {
1099 case PM_POST_HIBERNATION:
1100 case PM_POST_SUSPEND:
1101 if (!acpi_battery_present(battery))
1102 return 0;
1103
1104 if (!battery->bat) {
1105 result = acpi_battery_get_info(battery);
1106 if (result)
1107 return result;
1108
1109 result = sysfs_add_battery(battery);
1110 if (result)
1111 return result;
1112 } else
1113 acpi_battery_refresh(battery);
1114
1115 acpi_battery_init_alarm(battery);
1116 acpi_battery_get_state(battery);
1117 break;
1118 }
1119
1120 return 0;
1121}
1122
1123static int __init
1124battery_bix_broken_package_quirk(const struct dmi_system_id *d)
1125{
1126 battery_bix_broken_package = 1;
1127 return 0;
1128}
1129
1130static int __init
1131battery_notification_delay_quirk(const struct dmi_system_id *d)
1132{
1133 battery_notification_delay_ms = 1000;
1134 return 0;
1135}
1136
1137static const struct dmi_system_id bat_dmi_table[] __initconst = {
1138 {
1139 .callback = battery_bix_broken_package_quirk,
1140 .ident = "NEC LZ750/LS",
1141 .matches = {
1142 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1143 DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"),
1144 },
1145 },
1146 {
1147 .callback = battery_notification_delay_quirk,
1148 .ident = "Acer Aspire V5-573G",
1149 .matches = {
1150 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1151 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
1152 },
1153 },
1154 {},
1155};
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165static int acpi_battery_update_retry(struct acpi_battery *battery)
1166{
1167 int retry, ret;
1168
1169 for (retry = 5; retry; retry--) {
1170 ret = acpi_battery_update(battery, false);
1171 if (!ret)
1172 break;
1173
1174 msleep(20);
1175 }
1176 return ret;
1177}
1178
1179static int acpi_battery_add(struct acpi_device *device)
1180{
1181 int result = 0;
1182 struct acpi_battery *battery = NULL;
1183
1184 if (!device)
1185 return -EINVAL;
1186
1187 if (device->dep_unmet)
1188 return -EPROBE_DEFER;
1189
1190 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
1191 if (!battery)
1192 return -ENOMEM;
1193 battery->device = device;
1194 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
1195 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
1196 device->driver_data = battery;
1197 mutex_init(&battery->lock);
1198 mutex_init(&battery->sysfs_lock);
1199 if (acpi_has_method(battery->device->handle, "_BIX"))
1200 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
1201
1202 result = acpi_battery_update_retry(battery);
1203 if (result)
1204 goto fail;
1205
1206#ifdef CONFIG_ACPI_PROCFS_POWER
1207 result = acpi_battery_add_fs(device);
1208#endif
1209 if (result) {
1210#ifdef CONFIG_ACPI_PROCFS_POWER
1211 acpi_battery_remove_fs(device);
1212#endif
1213 goto fail;
1214 }
1215
1216 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
1217 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
1218 device->status.battery_present ? "present" : "absent");
1219
1220 battery->pm_nb.notifier_call = battery_notify;
1221 register_pm_notifier(&battery->pm_nb);
1222
1223 device_init_wakeup(&device->dev, 1);
1224
1225 return result;
1226
1227fail:
1228 sysfs_remove_battery(battery);
1229 mutex_destroy(&battery->lock);
1230 mutex_destroy(&battery->sysfs_lock);
1231 kfree(battery);
1232 return result;
1233}
1234
1235static int acpi_battery_remove(struct acpi_device *device)
1236{
1237 struct acpi_battery *battery = NULL;
1238
1239 if (!device || !acpi_driver_data(device))
1240 return -EINVAL;
1241 device_init_wakeup(&device->dev, 0);
1242 battery = acpi_driver_data(device);
1243 unregister_pm_notifier(&battery->pm_nb);
1244#ifdef CONFIG_ACPI_PROCFS_POWER
1245 acpi_battery_remove_fs(device);
1246#endif
1247 sysfs_remove_battery(battery);
1248 mutex_destroy(&battery->lock);
1249 mutex_destroy(&battery->sysfs_lock);
1250 kfree(battery);
1251 return 0;
1252}
1253
1254#ifdef CONFIG_PM_SLEEP
1255
1256static int acpi_battery_resume(struct device *dev)
1257{
1258 struct acpi_battery *battery;
1259
1260 if (!dev)
1261 return -EINVAL;
1262
1263 battery = acpi_driver_data(to_acpi_device(dev));
1264 if (!battery)
1265 return -EINVAL;
1266
1267 battery->update_time = 0;
1268 acpi_battery_update(battery, true);
1269 return 0;
1270}
1271#else
1272#define acpi_battery_resume NULL
1273#endif
1274
1275static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume);
1276
1277static struct acpi_driver acpi_battery_driver = {
1278 .name = "battery",
1279 .class = ACPI_BATTERY_CLASS,
1280 .ids = battery_device_ids,
1281 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1282 .ops = {
1283 .add = acpi_battery_add,
1284 .remove = acpi_battery_remove,
1285 .notify = acpi_battery_notify,
1286 },
1287 .drv.pm = &acpi_battery_pm,
1288};
1289
1290static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
1291{
1292 int result;
1293
1294 dmi_check_system(bat_dmi_table);
1295
1296#ifdef CONFIG_ACPI_PROCFS_POWER
1297 acpi_battery_dir = acpi_lock_battery_dir();
1298 if (!acpi_battery_dir)
1299 return;
1300#endif
1301 result = acpi_bus_register_driver(&acpi_battery_driver);
1302#ifdef CONFIG_ACPI_PROCFS_POWER
1303 if (result < 0)
1304 acpi_unlock_battery_dir(acpi_battery_dir);
1305#endif
1306}
1307
1308static int __init acpi_battery_init(void)
1309{
1310 if (acpi_disabled)
1311 return -ENODEV;
1312
1313 async_cookie = async_schedule(acpi_battery_init_async, NULL);
1314 return 0;
1315}
1316
1317static void __exit acpi_battery_exit(void)
1318{
1319 async_synchronize_cookie(async_cookie);
1320 acpi_bus_unregister_driver(&acpi_battery_driver);
1321#ifdef CONFIG_ACPI_PROCFS_POWER
1322 acpi_unlock_battery_dir(acpi_battery_dir);
1323#endif
1324}
1325
1326module_init(acpi_battery_init);
1327module_exit(acpi_battery_exit);
1328
