projects/linux·blob master · refs

717 lines · 18.9 KiB

1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)
4 *
5 * Copyright (c) 2007 Alexey Starikovskiy <[email protected]>
6 * Copyright (c) 2005-2007 Vladimir Lebedev <[email protected]>
7 * Copyright (c) 2005 Rich Townsend <[email protected]>
8 */
9
10#define pr_fmt(fmt) "ACPI: " fmt
11
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/kernel.h>
17
18#include <linux/acpi.h>
19#include <linux/timer.h>
20#include <linux/jiffies.h>
21#include <linux/delay.h>
22#include <linux/platform_device.h>
23#include <linux/power_supply.h>
24#include <linux/platform_data/x86/apple.h>
25#include <acpi/battery.h>
26
27#include "sbshc.h"
28
29#define ACPI_SBS_DEVICE_NAME "Smart Battery System"
30#define ACPI_BATTERY_DIR_NAME "BAT%i"
31#define ACPI_AC_DIR_NAME "AC0"
32
33#define ACPI_SBS_NOTIFY_STATUS 0x80
34#define ACPI_SBS_NOTIFY_INFO 0x81
35
36MODULE_AUTHOR("Alexey Starikovskiy <[email protected]>");
37MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
38MODULE_LICENSE("GPL");
39
40static unsigned int cache_time = 1000;
41module_param(cache_time, uint, 0644);
42MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
43
44#define MAX_SBS_BAT 4
45#define ACPI_SBS_BLOCK_MAX 32
46
47static const struct acpi_device_id sbs_device_ids[] = {
48 {"ACPI0002", 0},
49 {"", 0},
50};
51MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
52
53struct acpi_battery {
54 struct power_supply *bat;
55 struct power_supply_desc bat_desc;
56 struct acpi_sbs *sbs;
57 unsigned long update_time;
58 char name[8];
59 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
60 char device_name[ACPI_SBS_BLOCK_MAX];
61 char device_chemistry[ACPI_SBS_BLOCK_MAX];
62 u16 alarm_capacity;
63 u16 full_charge_capacity;
64 u16 design_capacity;
65 u16 design_voltage;
66 u16 serial_number;
67 u16 cycle_count;
68 u16 temp_now;
69 u16 voltage_now;
70 s16 rate_now;
71 s16 rate_avg;
72 u16 capacity_now;
73 u16 state_of_charge;
74 u16 state;
75 u16 mode;
76 u16 spec;
77 u8 id;
78 u8 present:1;
79};
80
81#define to_acpi_battery(x) power_supply_get_drvdata(x)
82
83struct acpi_sbs {
84 struct power_supply *charger;
85 struct acpi_device *device;
86 struct acpi_smb_hc *hc;
87 struct mutex lock;
88 struct acpi_battery battery[MAX_SBS_BAT];
89 u8 batteries_supported:4;
90 u8 manager_present:1;
91 u8 charger_present:1;
92 u8 charger_exists:1;
93};
94
95#define to_acpi_sbs(x) power_supply_get_drvdata(x)
96
97static void acpi_sbs_remove(struct platform_device *pdev);
98static int acpi_battery_get_state(struct acpi_battery *battery);
99
100static inline int battery_scale(int log)
101{
102 int scale = 1;
103 while (log--)
104 scale *= 10;
105 return scale;
106}
107
108static inline int acpi_battery_vscale(struct acpi_battery *battery)
109{
110 return battery_scale((battery->spec & 0x0f00) >> 8);
111}
112
113static inline int acpi_battery_ipscale(struct acpi_battery *battery)
114{
115 return battery_scale((battery->spec & 0xf000) >> 12);
116}
117
118static inline int acpi_battery_mode(struct acpi_battery *battery)
119{
120 return (battery->mode & 0x8000);
121}
122
123static inline int acpi_battery_scale(struct acpi_battery *battery)
124{
125 return (acpi_battery_mode(battery) ? 10 : 1) *
126 acpi_battery_ipscale(battery);
127}
128
129static int sbs_get_ac_property(struct power_supply *psy,
130 enum power_supply_property psp,
131 union power_supply_propval *val)
132{
133 struct acpi_sbs *sbs = to_acpi_sbs(psy);
134 switch (psp) {
135 case POWER_SUPPLY_PROP_ONLINE:
136 val->intval = sbs->charger_present;
137 break;
138 default:
139 return -EINVAL;
140 }
141 return 0;
142}
143
144static int acpi_battery_technology(struct acpi_battery *battery)
145{
146 if (!strcasecmp("NiCd", battery->device_chemistry))
147 return POWER_SUPPLY_TECHNOLOGY_NiCd;
148 if (!strcasecmp("NiMH", battery->device_chemistry))
149 return POWER_SUPPLY_TECHNOLOGY_NiMH;
150 if (!strcasecmp("LION", battery->device_chemistry))
151 return POWER_SUPPLY_TECHNOLOGY_LION;
152 if (!strcasecmp("LiP", battery->device_chemistry))
153 return POWER_SUPPLY_TECHNOLOGY_LIPO;
154 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
155}
156
157static int acpi_sbs_battery_get_property(struct power_supply *psy,
158 enum power_supply_property psp,
159 union power_supply_propval *val)
160{
161 struct acpi_battery *battery = to_acpi_battery(psy);
162
163 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
164 return -ENODEV;
165
166 acpi_battery_get_state(battery);
167 switch (psp) {
168 case POWER_SUPPLY_PROP_STATUS:
169 if (battery->rate_now < 0)
170 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
171 else if (battery->rate_now > 0)
172 val->intval = POWER_SUPPLY_STATUS_CHARGING;
173 else
174 val->intval = POWER_SUPPLY_STATUS_FULL;
175 break;
176 case POWER_SUPPLY_PROP_PRESENT:
177 val->intval = battery->present;
178 break;
179 case POWER_SUPPLY_PROP_TECHNOLOGY:
180 val->intval = acpi_battery_technology(battery);
181 break;
182 case POWER_SUPPLY_PROP_CYCLE_COUNT:
183 val->intval = battery->cycle_count;
184 break;
185 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
186 val->intval = battery->design_voltage *
187 acpi_battery_vscale(battery) * 1000;
188 break;
189 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
190 val->intval = battery->voltage_now *
191 acpi_battery_vscale(battery) * 1000;
192 break;
193 case POWER_SUPPLY_PROP_CURRENT_NOW:
194 case POWER_SUPPLY_PROP_POWER_NOW:
195 val->intval = abs(battery->rate_now) *
196 acpi_battery_ipscale(battery) * 1000;
197 val->intval *= (acpi_battery_mode(battery)) ?
198 (battery->voltage_now *
199 acpi_battery_vscale(battery) / 1000) : 1;
200 break;
201 case POWER_SUPPLY_PROP_CURRENT_AVG:
202 case POWER_SUPPLY_PROP_POWER_AVG:
203 val->intval = abs(battery->rate_avg) *
204 acpi_battery_ipscale(battery) * 1000;
205 val->intval *= (acpi_battery_mode(battery)) ?
206 (battery->voltage_now *
207 acpi_battery_vscale(battery) / 1000) : 1;
208 break;
209 case POWER_SUPPLY_PROP_CAPACITY:
210 val->intval = battery->state_of_charge;
211 break;
212 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
213 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
214 val->intval = battery->design_capacity *
215 acpi_battery_scale(battery) * 1000;
216 break;
217 case POWER_SUPPLY_PROP_CHARGE_FULL:
218 case POWER_SUPPLY_PROP_ENERGY_FULL:
219 val->intval = battery->full_charge_capacity *
220 acpi_battery_scale(battery) * 1000;
221 break;
222 case POWER_SUPPLY_PROP_CHARGE_NOW:
223 case POWER_SUPPLY_PROP_ENERGY_NOW:
224 val->intval = battery->capacity_now *
225 acpi_battery_scale(battery) * 1000;
226 break;
227 case POWER_SUPPLY_PROP_TEMP:
228 val->intval = battery->temp_now - 2730; // dK -> dC
229 break;
230 case POWER_SUPPLY_PROP_MODEL_NAME:
231 val->strval = battery->device_name;
232 break;
233 case POWER_SUPPLY_PROP_MANUFACTURER:
234 val->strval = battery->manufacturer_name;
235 break;
236 default:
237 return -EINVAL;
238 }
239 return 0;
240}
241
242static const enum power_supply_property sbs_ac_props[] = {
243 POWER_SUPPLY_PROP_ONLINE,
244};
245
246static const enum power_supply_property sbs_charge_battery_props[] = {
247 POWER_SUPPLY_PROP_STATUS,
248 POWER_SUPPLY_PROP_PRESENT,
249 POWER_SUPPLY_PROP_TECHNOLOGY,
250 POWER_SUPPLY_PROP_CYCLE_COUNT,
251 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
252 POWER_SUPPLY_PROP_VOLTAGE_NOW,
253 POWER_SUPPLY_PROP_CURRENT_NOW,
254 POWER_SUPPLY_PROP_CURRENT_AVG,
255 POWER_SUPPLY_PROP_CAPACITY,
256 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
257 POWER_SUPPLY_PROP_CHARGE_FULL,
258 POWER_SUPPLY_PROP_CHARGE_NOW,
259 POWER_SUPPLY_PROP_TEMP,
260 POWER_SUPPLY_PROP_MODEL_NAME,
261 POWER_SUPPLY_PROP_MANUFACTURER,
262};
263
264static const enum power_supply_property sbs_energy_battery_props[] = {
265 POWER_SUPPLY_PROP_STATUS,
266 POWER_SUPPLY_PROP_PRESENT,
267 POWER_SUPPLY_PROP_TECHNOLOGY,
268 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
269 POWER_SUPPLY_PROP_VOLTAGE_NOW,
270 POWER_SUPPLY_PROP_CURRENT_NOW,
271 POWER_SUPPLY_PROP_CURRENT_AVG,
272 POWER_SUPPLY_PROP_POWER_NOW,
273 POWER_SUPPLY_PROP_POWER_AVG,
274 POWER_SUPPLY_PROP_CAPACITY,
275 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
276 POWER_SUPPLY_PROP_ENERGY_FULL,
277 POWER_SUPPLY_PROP_ENERGY_NOW,
278 POWER_SUPPLY_PROP_TEMP,
279 POWER_SUPPLY_PROP_MODEL_NAME,
280 POWER_SUPPLY_PROP_MANUFACTURER,
281};
282
283static const struct power_supply_desc acpi_sbs_charger_desc = {
284 .name = "sbs-charger",
285 .type = POWER_SUPPLY_TYPE_MAINS,
286 .properties = sbs_ac_props,
287 .num_properties = ARRAY_SIZE(sbs_ac_props),
288 .get_property = sbs_get_ac_property,
289};
290
291/* --------------------------------------------------------------------------
292 Smart Battery System Management
293 -------------------------------------------------------------------------- */
294
295struct acpi_battery_reader {
296 u8 command; /* command for battery */
297 u8 mode; /* word or block? */
298 size_t offset; /* offset inside struct acpi_sbs_battery */
299};
300
301static struct acpi_battery_reader info_readers[] = {
302 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
303 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
304 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
305 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
306 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
307 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
308 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
309 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
310 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
311 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
312 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
313};
314
315static struct acpi_battery_reader state_readers[] = {
316 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
317 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
318 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
319 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
320 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
321 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
322 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
323};
324
325static int acpi_manager_get_info(struct acpi_sbs *sbs)
326{
327 int result = 0;
328 u16 battery_system_info;
329
330 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
331 0x04, (u8 *)&battery_system_info);
332 if (!result)
333 sbs->batteries_supported = battery_system_info & 0x000f;
334 return result;
335}
336
337static int acpi_battery_get_info(struct acpi_battery *battery)
338{
339 int i, result = 0;
340
341 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
342 result = acpi_smbus_read(battery->sbs->hc,
343 info_readers[i].mode,
344 ACPI_SBS_BATTERY,
345 info_readers[i].command,
346 (u8 *) battery +
347 info_readers[i].offset);
348 if (result)
349 break;
350 }
351 return result;
352}
353
354static int acpi_battery_get_state(struct acpi_battery *battery)
355{
356 int i, result = 0;
357
358 if (battery->update_time &&
359 time_before(jiffies, battery->update_time +
360 msecs_to_jiffies(cache_time)))
361 return 0;
362 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
363 result = acpi_smbus_read(battery->sbs->hc,
364 state_readers[i].mode,
365 ACPI_SBS_BATTERY,
366 state_readers[i].command,
367 (u8 *)battery +
368 state_readers[i].offset);
369 if (result)
370 goto end;
371 }
372 end:
373 battery->update_time = jiffies;
374 return result;
375}
376
377static int acpi_battery_get_alarm(struct acpi_battery *battery)
378{
379 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
380 ACPI_SBS_BATTERY, 0x01,
381 (u8 *)&battery->alarm_capacity);
382}
383
384static int acpi_battery_set_alarm(struct acpi_battery *battery)
385{
386 struct acpi_sbs *sbs = battery->sbs;
387 u16 value, sel = 1 << (battery->id + 12);
388
389 int ret;
390
391
392 if (sbs->manager_present) {
393 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
394 0x01, (u8 *)&value);
395 if (ret)
396 goto end;
397 if ((value & 0xf000) != sel) {
398 value &= 0x0fff;
399 value |= sel;
400 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
401 ACPI_SBS_MANAGER,
402 0x01, (u8 *)&value, 2);
403 if (ret)
404 goto end;
405 }
406 }
407 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
408 0x01, (u8 *)&battery->alarm_capacity, 2);
409 end:
410 return ret;
411}
412
413static int acpi_ac_get_present(struct acpi_sbs *sbs)
414{
415 int result;
416 u16 status;
417
418 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
419 0x13, (u8 *) & status);
420
421 if (result)
422 return result;
423
424 /*
425 * The spec requires that bit 4 always be 1. If it's not set, assume
426 * that the implementation doesn't support an SBS charger.
427 *
428 * And on some MacBooks a status of 0xffff is always returned, no
429 * matter whether the charger is plugged in or not, which is also
430 * wrong, so ignore the SBS charger for those too.
431 */
432 if (!((status >> 4) & 0x1) || status == 0xffff)
433 return -ENODEV;
434
435 sbs->charger_present = (status >> 15) & 0x1;
436 return 0;
437}
438
439static ssize_t acpi_battery_alarm_show(struct device *dev,
440 struct device_attribute *attr,
441 char *buf)
442{
443 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
444 acpi_battery_get_alarm(battery);
445 return sprintf(buf, "%d\n", battery->alarm_capacity *
446 acpi_battery_scale(battery) * 1000);
447}
448
449static ssize_t acpi_battery_alarm_store(struct device *dev,
450 struct device_attribute *attr,
451 const char *buf, size_t count)
452{
453 unsigned long x;
454 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
455 if (sscanf(buf, "%lu\n", &x) == 1)
456 battery->alarm_capacity = x /
457 (1000 * acpi_battery_scale(battery));
458 if (battery->present)
459 acpi_battery_set_alarm(battery);
460 return count;
461}
462
463static struct device_attribute alarm_attr = {
464 .attr = {.name = "alarm", .mode = 0644},
465 .show = acpi_battery_alarm_show,
466 .store = acpi_battery_alarm_store,
467};
468
469static struct attribute *acpi_battery_attrs[] = {
470 &alarm_attr.attr,
471 NULL
472};
473ATTRIBUTE_GROUPS(acpi_battery);
474
475/* --------------------------------------------------------------------------
476 Driver Interface
477 -------------------------------------------------------------------------- */
478static int acpi_battery_read(struct acpi_battery *battery)
479{
480 int result, saved_present = battery->present;
481 u16 state;
482
483 if (battery->sbs->manager_present) {
484 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
485 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
486 if (result)
487 return result;
488
489 battery->present = !!(state & (1 << battery->id));
490 if (!battery->present)
491 return 0;
492
493 /* Masking necessary for Smart Battery Selectors */
494 state = 0x0fff;
495 state |= 1 << (battery->id + 12);
496 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
497 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
498 } else {
499 if (battery->id == 0) {
500 battery->present = 1;
501 } else {
502 if (!battery->present)
503 return 0;
504 }
505 }
506
507 if (saved_present != battery->present) {
508 battery->update_time = 0;
509 result = acpi_battery_get_info(battery);
510 if (result) {
511 battery->present = 0;
512 return result;
513 }
514 }
515 result = acpi_battery_get_state(battery);
516 if (result)
517 battery->present = 0;
518 return result;
519}
520
521/* Smart Battery */
522static int acpi_battery_add(struct acpi_sbs *sbs, int id)
523{
524 struct acpi_battery *battery = &sbs->battery[id];
525 struct power_supply_config psy_cfg = {
526 .drv_data = battery,
527 .attr_grp = acpi_battery_groups,
528 };
529 int result;
530
531 battery->id = id;
532 battery->sbs = sbs;
533 result = acpi_battery_read(battery);
534 if (result)
535 return result;
536
537 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
538 battery->bat_desc.name = battery->name;
539 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
540 if (!acpi_battery_mode(battery)) {
541 battery->bat_desc.properties = sbs_charge_battery_props;
542 battery->bat_desc.num_properties =
543 ARRAY_SIZE(sbs_charge_battery_props);
544 } else {
545 battery->bat_desc.properties = sbs_energy_battery_props;
546 battery->bat_desc.num_properties =
547 ARRAY_SIZE(sbs_energy_battery_props);
548 }
549 battery->bat_desc.get_property = acpi_sbs_battery_get_property;
550 battery->bat = power_supply_register(&sbs->device->dev,
551 &battery->bat_desc, &psy_cfg);
552 if (IS_ERR(battery->bat)) {
553 result = PTR_ERR(battery->bat);
554 battery->bat = NULL;
555 goto end;
556 }
557
558 end:
559 pr_info("%s [%s]: Battery Slot [%s] (battery %s)\n",
560 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
561 battery->name, battery->present ? "present" : "absent");
562 return result;
563}
564
565static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
566{
567 struct acpi_battery *battery = &sbs->battery[id];
568
569 if (battery->bat)
570 power_supply_unregister(battery->bat);
571}
572
573static int acpi_charger_add(struct acpi_sbs *sbs)
574{
575 int result;
576 struct power_supply_config psy_cfg = { .drv_data = sbs, };
577
578 result = acpi_ac_get_present(sbs);
579 if (result)
580 goto end;
581
582 sbs->charger_exists = 1;
583 sbs->charger = power_supply_register(&sbs->device->dev,
584 &acpi_sbs_charger_desc, &psy_cfg);
585 if (IS_ERR(sbs->charger)) {
586 result = PTR_ERR(sbs->charger);
587 sbs->charger = NULL;
588 }
589 pr_info("%s [%s]: AC Adapter [%s] (%s)\n",
590 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
591 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
592end:
593 return result;
594}
595
596static void acpi_charger_remove(struct acpi_sbs *sbs)
597{
598 if (sbs->charger)
599 power_supply_unregister(sbs->charger);
600}
601
602static void acpi_sbs_callback(void *context)
603{
604 int id;
605 struct acpi_sbs *sbs = context;
606 struct acpi_battery *bat;
607 u8 saved_charger_state = sbs->charger_present;
608 u8 saved_battery_state;
609
610 if (sbs->charger_exists) {
611 acpi_ac_get_present(sbs);
612 if (sbs->charger_present != saved_charger_state)
613 power_supply_changed(sbs->charger);
614 }
615
616 if (sbs->manager_present) {
617 for (id = 0; id < MAX_SBS_BAT; ++id) {
618 if (!(sbs->batteries_supported & (1 << id)))
619 continue;
620 bat = &sbs->battery[id];
621 saved_battery_state = bat->present;
622 acpi_battery_read(bat);
623 if (saved_battery_state == bat->present)
624 continue;
625 power_supply_changed(bat->bat);
626 }
627 }
628}
629
630static int acpi_sbs_probe(struct platform_device *pdev)
631{
632 struct acpi_device *device;
633 struct acpi_sbs *sbs;
634 int result = 0;
635 int id;
636
637 device = ACPI_COMPANION(&pdev->dev);
638 if (!device)
639 return -ENODEV;
640
641 sbs = kzalloc_obj(struct acpi_sbs);
642 if (!sbs) {
643 result = -ENOMEM;
644 goto end;
645 }
646
647 mutex_init(&sbs->lock);
648
649 platform_set_drvdata(pdev, sbs);
650
651 sbs->hc = dev_get_drvdata(pdev->dev.parent);
652 sbs->device = device;
653
654 result = acpi_charger_add(sbs);
655 if (result && result != -ENODEV)
656 goto end;
657
658 result = 0;
659
660 if (!x86_apple_machine) {
661 result = acpi_manager_get_info(sbs);
662 if (!result) {
663 sbs->manager_present = 1;
664 for (id = 0; id < MAX_SBS_BAT; ++id)
665 if ((sbs->batteries_supported & (1 << id)))
666 acpi_battery_add(sbs, id);
667 }
668 }
669
670 if (!sbs->manager_present)
671 acpi_battery_add(sbs, 0);
672
673 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
674end:
675 if (result)
676 acpi_sbs_remove(pdev);
677 return result;
678}
679
680static void acpi_sbs_remove(struct platform_device *pdev)
681{
682 struct acpi_sbs *sbs = platform_get_drvdata(pdev);
683 int id;
684
685 mutex_lock(&sbs->lock);
686 acpi_smbus_unregister_callback(sbs->hc);
687 for (id = 0; id < MAX_SBS_BAT; ++id)
688 acpi_battery_remove(sbs, id);
689 acpi_charger_remove(sbs);
690 mutex_unlock(&sbs->lock);
691 mutex_destroy(&sbs->lock);
692 kfree(sbs);
693}
694
695#ifdef CONFIG_PM_SLEEP
696static int acpi_sbs_resume(struct device *dev)
697{
698 acpi_sbs_callback(dev_get_drvdata(dev));
699 return 0;
700}
701#else
702#define acpi_sbs_resume NULL
703#endif
704
705static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);
706
707static struct platform_driver acpi_sbs_driver = {
708 .probe = acpi_sbs_probe,
709 .remove = acpi_sbs_remove,
710 .driver = {
711 .name = "acpi-sbs",
712 .acpi_match_table = sbs_device_ids,
713 .pm = &acpi_sbs_pm,
714 },
715};
716
717module_platform_driver(acpi_sbs_driver);