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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 <astarikovskiy@suse.de>
6 * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
7 * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>
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/power_supply.h>
23#include <linux/platform_data/x86/apple.h>
24#include <acpi/battery.h>
25
26#include "sbshc.h"
27
28#define ACPI_SBS_CLASS "sbs"
29#define ACPI_AC_CLASS "ac_adapter"
30#define ACPI_SBS_DEVICE_NAME "Smart Battery System"
31#define ACPI_BATTERY_DIR_NAME "BAT%i"
32#define ACPI_AC_DIR_NAME "AC0"
33
34#define ACPI_SBS_NOTIFY_STATUS 0x80
35#define ACPI_SBS_NOTIFY_INFO 0x81
36
37MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
38MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
39MODULE_LICENSE("GPL");
40
41static unsigned int cache_time = 1000;
42module_param(cache_time, uint, 0644);
43MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
44
45#define MAX_SBS_BAT 4
46#define ACPI_SBS_BLOCK_MAX 32
47
48static const struct acpi_device_id sbs_device_ids[] = {
49 {"ACPI0002", 0},
50 {"", 0},
51};
52MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
53
54struct acpi_battery {
55 struct power_supply *bat;
56 struct power_supply_desc bat_desc;
57 struct acpi_sbs *sbs;
58 unsigned long update_time;
59 char name[8];
60 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
61 char device_name[ACPI_SBS_BLOCK_MAX];
62 char device_chemistry[ACPI_SBS_BLOCK_MAX];
63 u16 alarm_capacity;
64 u16 full_charge_capacity;
65 u16 design_capacity;
66 u16 design_voltage;
67 u16 serial_number;
68 u16 cycle_count;
69 u16 temp_now;
70 u16 voltage_now;
71 s16 rate_now;
72 s16 rate_avg;
73 u16 capacity_now;
74 u16 state_of_charge;
75 u16 state;
76 u16 mode;
77 u16 spec;
78 u8 id;
79 u8 present:1;
80};
81
82#define to_acpi_battery(x) power_supply_get_drvdata(x)
83
84struct acpi_sbs {
85 struct power_supply *charger;
86 struct acpi_device *device;
87 struct acpi_smb_hc *hc;
88 struct mutex lock;
89 struct acpi_battery battery[MAX_SBS_BAT];
90 u8 batteries_supported:4;
91 u8 manager_present:1;
92 u8 charger_present:1;
93 u8 charger_exists:1;
94};
95
96#define to_acpi_sbs(x) power_supply_get_drvdata(x)
97
98static void acpi_sbs_remove(struct acpi_device *device);
99static int acpi_battery_get_state(struct acpi_battery *battery);
100
101static inline int battery_scale(int log)
102{
103 int scale = 1;
104 while (log--)
105 scale *= 10;
106 return scale;
107}
108
109static inline int acpi_battery_vscale(struct acpi_battery *battery)
110{
111 return battery_scale((battery->spec & 0x0f00) >> 8);
112}
113
114static inline int acpi_battery_ipscale(struct acpi_battery *battery)
115{
116 return battery_scale((battery->spec & 0xf000) >> 12);
117}
118
119static inline int acpi_battery_mode(struct acpi_battery *battery)
120{
121 return (battery->mode & 0x8000);
122}
123
124static inline int acpi_battery_scale(struct acpi_battery *battery)
125{
126 return (acpi_battery_mode(battery) ? 10 : 1) *
127 acpi_battery_ipscale(battery);
128}
129
130static int sbs_get_ac_property(struct power_supply *psy,
131 enum power_supply_property psp,
132 union power_supply_propval *val)
133{
134 struct acpi_sbs *sbs = to_acpi_sbs(psy);
135 switch (psp) {
136 case POWER_SUPPLY_PROP_ONLINE:
137 val->intval = sbs->charger_present;
138 break;
139 default:
140 return -EINVAL;
141 }
142 return 0;
143}
144
145static int acpi_battery_technology(struct acpi_battery *battery)
146{
147 if (!strcasecmp("NiCd", battery->device_chemistry))
148 return POWER_SUPPLY_TECHNOLOGY_NiCd;
149 if (!strcasecmp("NiMH", battery->device_chemistry))
150 return POWER_SUPPLY_TECHNOLOGY_NiMH;
151 if (!strcasecmp("LION", battery->device_chemistry))
152 return POWER_SUPPLY_TECHNOLOGY_LION;
153 if (!strcasecmp("LiP", battery->device_chemistry))
154 return POWER_SUPPLY_TECHNOLOGY_LIPO;
155 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
156}
157
158static int acpi_sbs_battery_get_property(struct power_supply *psy,
159 enum power_supply_property psp,
160 union power_supply_propval *val)
161{
162 struct acpi_battery *battery = to_acpi_battery(psy);
163
164 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
165 return -ENODEV;
166
167 acpi_battery_get_state(battery);
168 switch (psp) {
169 case POWER_SUPPLY_PROP_STATUS:
170 if (battery->rate_now < 0)
171 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
172 else if (battery->rate_now > 0)
173 val->intval = POWER_SUPPLY_STATUS_CHARGING;
174 else
175 val->intval = POWER_SUPPLY_STATUS_FULL;
176 break;
177 case POWER_SUPPLY_PROP_PRESENT:
178 val->intval = battery->present;
179 break;
180 case POWER_SUPPLY_PROP_TECHNOLOGY:
181 val->intval = acpi_battery_technology(battery);
182 break;
183 case POWER_SUPPLY_PROP_CYCLE_COUNT:
184 val->intval = battery->cycle_count;
185 break;
186 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
187 val->intval = battery->design_voltage *
188 acpi_battery_vscale(battery) * 1000;
189 break;
190 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
191 val->intval = battery->voltage_now *
192 acpi_battery_vscale(battery) * 1000;
193 break;
194 case POWER_SUPPLY_PROP_CURRENT_NOW:
195 case POWER_SUPPLY_PROP_POWER_NOW:
196 val->intval = abs(battery->rate_now) *
197 acpi_battery_ipscale(battery) * 1000;
198 val->intval *= (acpi_battery_mode(battery)) ?
199 (battery->voltage_now *
200 acpi_battery_vscale(battery) / 1000) : 1;
201 break;
202 case POWER_SUPPLY_PROP_CURRENT_AVG:
203 case POWER_SUPPLY_PROP_POWER_AVG:
204 val->intval = abs(battery->rate_avg) *
205 acpi_battery_ipscale(battery) * 1000;
206 val->intval *= (acpi_battery_mode(battery)) ?
207 (battery->voltage_now *
208 acpi_battery_vscale(battery) / 1000) : 1;
209 break;
210 case POWER_SUPPLY_PROP_CAPACITY:
211 val->intval = battery->state_of_charge;
212 break;
213 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
214 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
215 val->intval = battery->design_capacity *
216 acpi_battery_scale(battery) * 1000;
217 break;
218 case POWER_SUPPLY_PROP_CHARGE_FULL:
219 case POWER_SUPPLY_PROP_ENERGY_FULL:
220 val->intval = battery->full_charge_capacity *
221 acpi_battery_scale(battery) * 1000;
222 break;
223 case POWER_SUPPLY_PROP_CHARGE_NOW:
224 case POWER_SUPPLY_PROP_ENERGY_NOW:
225 val->intval = battery->capacity_now *
226 acpi_battery_scale(battery) * 1000;
227 break;
228 case POWER_SUPPLY_PROP_TEMP:
229 val->intval = battery->temp_now - 2730; // dK -> dC
230 break;
231 case POWER_SUPPLY_PROP_MODEL_NAME:
232 val->strval = battery->device_name;
233 break;
234 case POWER_SUPPLY_PROP_MANUFACTURER:
235 val->strval = battery->manufacturer_name;
236 break;
237 default:
238 return -EINVAL;
239 }
240 return 0;
241}
242
243static const enum power_supply_property sbs_ac_props[] = {
244 POWER_SUPPLY_PROP_ONLINE,
245};
246
247static const enum power_supply_property sbs_charge_battery_props[] = {
248 POWER_SUPPLY_PROP_STATUS,
249 POWER_SUPPLY_PROP_PRESENT,
250 POWER_SUPPLY_PROP_TECHNOLOGY,
251 POWER_SUPPLY_PROP_CYCLE_COUNT,
252 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
253 POWER_SUPPLY_PROP_VOLTAGE_NOW,
254 POWER_SUPPLY_PROP_CURRENT_NOW,
255 POWER_SUPPLY_PROP_CURRENT_AVG,
256 POWER_SUPPLY_PROP_CAPACITY,
257 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
258 POWER_SUPPLY_PROP_CHARGE_FULL,
259 POWER_SUPPLY_PROP_CHARGE_NOW,
260 POWER_SUPPLY_PROP_TEMP,
261 POWER_SUPPLY_PROP_MODEL_NAME,
262 POWER_SUPPLY_PROP_MANUFACTURER,
263};
264
265static const enum power_supply_property sbs_energy_battery_props[] = {
266 POWER_SUPPLY_PROP_STATUS,
267 POWER_SUPPLY_PROP_PRESENT,
268 POWER_SUPPLY_PROP_TECHNOLOGY,
269 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
270 POWER_SUPPLY_PROP_VOLTAGE_NOW,
271 POWER_SUPPLY_PROP_CURRENT_NOW,
272 POWER_SUPPLY_PROP_CURRENT_AVG,
273 POWER_SUPPLY_PROP_POWER_NOW,
274 POWER_SUPPLY_PROP_POWER_AVG,
275 POWER_SUPPLY_PROP_CAPACITY,
276 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
277 POWER_SUPPLY_PROP_ENERGY_FULL,
278 POWER_SUPPLY_PROP_ENERGY_NOW,
279 POWER_SUPPLY_PROP_TEMP,
280 POWER_SUPPLY_PROP_MODEL_NAME,
281 POWER_SUPPLY_PROP_MANUFACTURER,
282};
283
284static const struct power_supply_desc acpi_sbs_charger_desc = {
285 .name = "sbs-charger",
286 .type = POWER_SUPPLY_TYPE_MAINS,
287 .properties = sbs_ac_props,
288 .num_properties = ARRAY_SIZE(sbs_ac_props),
289 .get_property = sbs_get_ac_property,
290};
291
292/* --------------------------------------------------------------------------
293 Smart Battery System Management
294 -------------------------------------------------------------------------- */
295
296struct acpi_battery_reader {
297 u8 command; /* command for battery */
298 u8 mode; /* word or block? */
299 size_t offset; /* offset inside struct acpi_sbs_battery */
300};
301
302static struct acpi_battery_reader info_readers[] = {
303 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
304 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
305 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
306 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
307 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
308 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
309 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
310 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
311 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
312 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
313 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
314};
315
316static struct acpi_battery_reader state_readers[] = {
317 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
318 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
319 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
320 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
321 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
322 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
323 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
324};
325
326static int acpi_manager_get_info(struct acpi_sbs *sbs)
327{
328 int result = 0;
329 u16 battery_system_info;
330
331 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
332 0x04, (u8 *)&battery_system_info);
333 if (!result)
334 sbs->batteries_supported = battery_system_info & 0x000f;
335 return result;
336}
337
338static int acpi_battery_get_info(struct acpi_battery *battery)
339{
340 int i, result = 0;
341
342 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
343 result = acpi_smbus_read(battery->sbs->hc,
344 info_readers[i].mode,
345 ACPI_SBS_BATTERY,
346 info_readers[i].command,
347 (u8 *) battery +
348 info_readers[i].offset);
349 if (result)
350 break;
351 }
352 return result;
353}
354
355static int acpi_battery_get_state(struct acpi_battery *battery)
356{
357 int i, result = 0;
358
359 if (battery->update_time &&
360 time_before(jiffies, battery->update_time +
361 msecs_to_jiffies(cache_time)))
362 return 0;
363 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
364 result = acpi_smbus_read(battery->sbs->hc,
365 state_readers[i].mode,
366 ACPI_SBS_BATTERY,
367 state_readers[i].command,
368 (u8 *)battery +
369 state_readers[i].offset);
370 if (result)
371 goto end;
372 }
373 end:
374 battery->update_time = jiffies;
375 return result;
376}
377
378static int acpi_battery_get_alarm(struct acpi_battery *battery)
379{
380 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
381 ACPI_SBS_BATTERY, 0x01,
382 (u8 *)&battery->alarm_capacity);
383}
384
385static int acpi_battery_set_alarm(struct acpi_battery *battery)
386{
387 struct acpi_sbs *sbs = battery->sbs;
388 u16 value, sel = 1 << (battery->id + 12);
389
390 int ret;
391
392
393 if (sbs->manager_present) {
394 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
395 0x01, (u8 *)&value);
396 if (ret)
397 goto end;
398 if ((value & 0xf000) != sel) {
399 value &= 0x0fff;
400 value |= sel;
401 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
402 ACPI_SBS_MANAGER,
403 0x01, (u8 *)&value, 2);
404 if (ret)
405 goto end;
406 }
407 }
408 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
409 0x01, (u8 *)&battery->alarm_capacity, 2);
410 end:
411 return ret;
412}
413
414static int acpi_ac_get_present(struct acpi_sbs *sbs)
415{
416 int result;
417 u16 status;
418
419 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
420 0x13, (u8 *) & status);
421
422 if (result)
423 return result;
424
425 /*
426 * The spec requires that bit 4 always be 1. If it's not set, assume
427 * that the implementation doesn't support an SBS charger.
428 *
429 * And on some MacBooks a status of 0xffff is always returned, no
430 * matter whether the charger is plugged in or not, which is also
431 * wrong, so ignore the SBS charger for those too.
432 */
433 if (!((status >> 4) & 0x1) || status == 0xffff)
434 return -ENODEV;
435
436 sbs->charger_present = (status >> 15) & 0x1;
437 return 0;
438}
439
440static ssize_t acpi_battery_alarm_show(struct device *dev,
441 struct device_attribute *attr,
442 char *buf)
443{
444 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
445 acpi_battery_get_alarm(battery);
446 return sprintf(buf, "%d\n", battery->alarm_capacity *
447 acpi_battery_scale(battery) * 1000);
448}
449
450static ssize_t acpi_battery_alarm_store(struct device *dev,
451 struct device_attribute *attr,
452 const char *buf, size_t count)
453{
454 unsigned long x;
455 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
456 if (sscanf(buf, "%lu\n", &x) == 1)
457 battery->alarm_capacity = x /
458 (1000 * acpi_battery_scale(battery));
459 if (battery->present)
460 acpi_battery_set_alarm(battery);
461 return count;
462}
463
464static struct device_attribute alarm_attr = {
465 .attr = {.name = "alarm", .mode = 0644},
466 .show = acpi_battery_alarm_show,
467 .store = acpi_battery_alarm_store,
468};
469
470static struct attribute *acpi_battery_attrs[] = {
471 &alarm_attr.attr,
472 NULL
473};
474ATTRIBUTE_GROUPS(acpi_battery);
475
476/* --------------------------------------------------------------------------
477 Driver Interface
478 -------------------------------------------------------------------------- */
479static int acpi_battery_read(struct acpi_battery *battery)
480{
481 int result, saved_present = battery->present;
482 u16 state;
483
484 if (battery->sbs->manager_present) {
485 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
486 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
487 if (result)
488 return result;
489
490 battery->present = state & (1 << battery->id);
491 if (!battery->present)
492 return 0;
493
494 /* Masking necessary for Smart Battery Selectors */
495 state = 0x0fff;
496 state |= 1 << (battery->id + 12);
497 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
498 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
499 } else {
500 if (battery->id == 0) {
501 battery->present = 1;
502 } else {
503 if (!battery->present)
504 return 0;
505 }
506 }
507
508 if (saved_present != battery->present) {
509 battery->update_time = 0;
510 result = acpi_battery_get_info(battery);
511 if (result) {
512 battery->present = 0;
513 return result;
514 }
515 }
516 result = acpi_battery_get_state(battery);
517 if (result)
518 battery->present = 0;
519 return result;
520}
521
522/* Smart Battery */
523static int acpi_battery_add(struct acpi_sbs *sbs, int id)
524{
525 struct acpi_battery *battery = &sbs->battery[id];
526 struct power_supply_config psy_cfg = {
527 .drv_data = battery,
528 .attr_grp = acpi_battery_groups,
529 };
530 int result;
531
532 battery->id = id;
533 battery->sbs = sbs;
534 result = acpi_battery_read(battery);
535 if (result)
536 return result;
537
538 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
539 battery->bat_desc.name = battery->name;
540 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
541 if (!acpi_battery_mode(battery)) {
542 battery->bat_desc.properties = sbs_charge_battery_props;
543 battery->bat_desc.num_properties =
544 ARRAY_SIZE(sbs_charge_battery_props);
545 } else {
546 battery->bat_desc.properties = sbs_energy_battery_props;
547 battery->bat_desc.num_properties =
548 ARRAY_SIZE(sbs_energy_battery_props);
549 }
550 battery->bat_desc.get_property = acpi_sbs_battery_get_property;
551 battery->bat = power_supply_register(&sbs->device->dev,
552 &battery->bat_desc, &psy_cfg);
553 if (IS_ERR(battery->bat)) {
554 result = PTR_ERR(battery->bat);
555 battery->bat = NULL;
556 goto end;
557 }
558
559 end:
560 pr_info("%s [%s]: Battery Slot [%s] (battery %s)\n",
561 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
562 battery->name, battery->present ? "present" : "absent");
563 return result;
564}
565
566static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
567{
568 struct acpi_battery *battery = &sbs->battery[id];
569
570 if (battery->bat)
571 power_supply_unregister(battery->bat);
572}
573
574static int acpi_charger_add(struct acpi_sbs *sbs)
575{
576 int result;
577 struct power_supply_config psy_cfg = { .drv_data = sbs, };
578
579 result = acpi_ac_get_present(sbs);
580 if (result)
581 goto end;
582
583 sbs->charger_exists = 1;
584 sbs->charger = power_supply_register(&sbs->device->dev,
585 &acpi_sbs_charger_desc, &psy_cfg);
586 if (IS_ERR(sbs->charger)) {
587 result = PTR_ERR(sbs->charger);
588 sbs->charger = NULL;
589 }
590 pr_info("%s [%s]: AC Adapter [%s] (%s)\n",
591 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
592 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
593end:
594 return result;
595}
596
597static void acpi_charger_remove(struct acpi_sbs *sbs)
598{
599 if (sbs->charger)
600 power_supply_unregister(sbs->charger);
601}
602
603static void acpi_sbs_callback(void *context)
604{
605 int id;
606 struct acpi_sbs *sbs = context;
607 struct acpi_battery *bat;
608 u8 saved_charger_state = sbs->charger_present;
609 u8 saved_battery_state;
610
611 if (sbs->charger_exists) {
612 acpi_ac_get_present(sbs);
613 if (sbs->charger_present != saved_charger_state)
614 power_supply_changed(sbs->charger);
615 }
616
617 if (sbs->manager_present) {
618 for (id = 0; id < MAX_SBS_BAT; ++id) {
619 if (!(sbs->batteries_supported & (1 << id)))
620 continue;
621 bat = &sbs->battery[id];
622 saved_battery_state = bat->present;
623 acpi_battery_read(bat);
624 if (saved_battery_state == bat->present)
625 continue;
626 power_supply_changed(bat->bat);
627 }
628 }
629}
630
631static int acpi_sbs_add(struct acpi_device *device)
632{
633 struct acpi_sbs *sbs;
634 int result = 0;
635 int id;
636
637 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
638 if (!sbs) {
639 result = -ENOMEM;
640 goto end;
641 }
642
643 mutex_init(&sbs->lock);
644
645 sbs->hc = acpi_driver_data(acpi_dev_parent(device));
646 sbs->device = device;
647 strscpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
648 strscpy(acpi_device_class(device), ACPI_SBS_CLASS);
649 device->driver_data = sbs;
650
651 result = acpi_charger_add(sbs);
652 if (result && result != -ENODEV)
653 goto end;
654
655 result = 0;
656
657 if (!x86_apple_machine) {
658 result = acpi_manager_get_info(sbs);
659 if (!result) {
660 sbs->manager_present = 1;
661 for (id = 0; id < MAX_SBS_BAT; ++id)
662 if ((sbs->batteries_supported & (1 << id)))
663 acpi_battery_add(sbs, id);
664 }
665 }
666
667 if (!sbs->manager_present)
668 acpi_battery_add(sbs, 0);
669
670 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
671end:
672 if (result)
673 acpi_sbs_remove(device);
674 return result;
675}
676
677static void acpi_sbs_remove(struct acpi_device *device)
678{
679 struct acpi_sbs *sbs;
680 int id;
681
682 if (!device)
683 return;
684 sbs = acpi_driver_data(device);
685 if (!sbs)
686 return;
687 mutex_lock(&sbs->lock);
688 acpi_smbus_unregister_callback(sbs->hc);
689 for (id = 0; id < MAX_SBS_BAT; ++id)
690 acpi_battery_remove(sbs, id);
691 acpi_charger_remove(sbs);
692 mutex_unlock(&sbs->lock);
693 mutex_destroy(&sbs->lock);
694 kfree(sbs);
695}
696
697#ifdef CONFIG_PM_SLEEP
698static int acpi_sbs_resume(struct device *dev)
699{
700 struct acpi_sbs *sbs;
701 if (!dev)
702 return -EINVAL;
703 sbs = to_acpi_device(dev)->driver_data;
704 acpi_sbs_callback(sbs);
705 return 0;
706}
707#else
708#define acpi_sbs_resume NULL
709#endif
710
711static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);
712
713static struct acpi_driver acpi_sbs_driver = {
714 .name = "sbs",
715 .class = ACPI_SBS_CLASS,
716 .ids = sbs_device_ids,
717 .ops = {
718 .add = acpi_sbs_add,
719 .remove = acpi_sbs_remove,
720 },
721 .drv.pm = &acpi_sbs_pm,
722};
723module_acpi_driver(acpi_sbs_driver);
1/*
2 * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)
3 *
4 * Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
6 * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
21 */
22
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/kernel.h>
28
29#include <linux/acpi.h>
30#include <linux/timer.h>
31#include <linux/jiffies.h>
32#include <linux/delay.h>
33#include <linux/power_supply.h>
34#include <linux/platform_data/x86/apple.h>
35#include <acpi/battery.h>
36
37#include "sbshc.h"
38
39#define PREFIX "ACPI: "
40
41#define ACPI_SBS_CLASS "sbs"
42#define ACPI_AC_CLASS "ac_adapter"
43#define ACPI_SBS_DEVICE_NAME "Smart Battery System"
44#define ACPI_SBS_FILE_INFO "info"
45#define ACPI_SBS_FILE_STATE "state"
46#define ACPI_SBS_FILE_ALARM "alarm"
47#define ACPI_BATTERY_DIR_NAME "BAT%i"
48#define ACPI_AC_DIR_NAME "AC0"
49
50#define ACPI_SBS_NOTIFY_STATUS 0x80
51#define ACPI_SBS_NOTIFY_INFO 0x81
52
53MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
54MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
55MODULE_LICENSE("GPL");
56
57static unsigned int cache_time = 1000;
58module_param(cache_time, uint, 0644);
59MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
60
61#define MAX_SBS_BAT 4
62#define ACPI_SBS_BLOCK_MAX 32
63
64static const struct acpi_device_id sbs_device_ids[] = {
65 {"ACPI0002", 0},
66 {"", 0},
67};
68MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
69
70struct acpi_battery {
71 struct power_supply *bat;
72 struct power_supply_desc bat_desc;
73 struct acpi_sbs *sbs;
74 unsigned long update_time;
75 char name[8];
76 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
77 char device_name[ACPI_SBS_BLOCK_MAX];
78 char device_chemistry[ACPI_SBS_BLOCK_MAX];
79 u16 alarm_capacity;
80 u16 full_charge_capacity;
81 u16 design_capacity;
82 u16 design_voltage;
83 u16 serial_number;
84 u16 cycle_count;
85 u16 temp_now;
86 u16 voltage_now;
87 s16 rate_now;
88 s16 rate_avg;
89 u16 capacity_now;
90 u16 state_of_charge;
91 u16 state;
92 u16 mode;
93 u16 spec;
94 u8 id;
95 u8 present:1;
96 u8 have_sysfs_alarm:1;
97};
98
99#define to_acpi_battery(x) power_supply_get_drvdata(x)
100
101struct acpi_sbs {
102 struct power_supply *charger;
103 struct acpi_device *device;
104 struct acpi_smb_hc *hc;
105 struct mutex lock;
106 struct acpi_battery battery[MAX_SBS_BAT];
107 u8 batteries_supported:4;
108 u8 manager_present:1;
109 u8 charger_present:1;
110 u8 charger_exists:1;
111};
112
113#define to_acpi_sbs(x) power_supply_get_drvdata(x)
114
115static int acpi_sbs_remove(struct acpi_device *device);
116static int acpi_battery_get_state(struct acpi_battery *battery);
117
118static inline int battery_scale(int log)
119{
120 int scale = 1;
121 while (log--)
122 scale *= 10;
123 return scale;
124}
125
126static inline int acpi_battery_vscale(struct acpi_battery *battery)
127{
128 return battery_scale((battery->spec & 0x0f00) >> 8);
129}
130
131static inline int acpi_battery_ipscale(struct acpi_battery *battery)
132{
133 return battery_scale((battery->spec & 0xf000) >> 12);
134}
135
136static inline int acpi_battery_mode(struct acpi_battery *battery)
137{
138 return (battery->mode & 0x8000);
139}
140
141static inline int acpi_battery_scale(struct acpi_battery *battery)
142{
143 return (acpi_battery_mode(battery) ? 10 : 1) *
144 acpi_battery_ipscale(battery);
145}
146
147static int sbs_get_ac_property(struct power_supply *psy,
148 enum power_supply_property psp,
149 union power_supply_propval *val)
150{
151 struct acpi_sbs *sbs = to_acpi_sbs(psy);
152 switch (psp) {
153 case POWER_SUPPLY_PROP_ONLINE:
154 val->intval = sbs->charger_present;
155 break;
156 default:
157 return -EINVAL;
158 }
159 return 0;
160}
161
162static int acpi_battery_technology(struct acpi_battery *battery)
163{
164 if (!strcasecmp("NiCd", battery->device_chemistry))
165 return POWER_SUPPLY_TECHNOLOGY_NiCd;
166 if (!strcasecmp("NiMH", battery->device_chemistry))
167 return POWER_SUPPLY_TECHNOLOGY_NiMH;
168 if (!strcasecmp("LION", battery->device_chemistry))
169 return POWER_SUPPLY_TECHNOLOGY_LION;
170 if (!strcasecmp("LiP", battery->device_chemistry))
171 return POWER_SUPPLY_TECHNOLOGY_LIPO;
172 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
173}
174
175static int acpi_sbs_battery_get_property(struct power_supply *psy,
176 enum power_supply_property psp,
177 union power_supply_propval *val)
178{
179 struct acpi_battery *battery = to_acpi_battery(psy);
180
181 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
182 return -ENODEV;
183
184 acpi_battery_get_state(battery);
185 switch (psp) {
186 case POWER_SUPPLY_PROP_STATUS:
187 if (battery->rate_now < 0)
188 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
189 else if (battery->rate_now > 0)
190 val->intval = POWER_SUPPLY_STATUS_CHARGING;
191 else
192 val->intval = POWER_SUPPLY_STATUS_FULL;
193 break;
194 case POWER_SUPPLY_PROP_PRESENT:
195 val->intval = battery->present;
196 break;
197 case POWER_SUPPLY_PROP_TECHNOLOGY:
198 val->intval = acpi_battery_technology(battery);
199 break;
200 case POWER_SUPPLY_PROP_CYCLE_COUNT:
201 val->intval = battery->cycle_count;
202 break;
203 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
204 val->intval = battery->design_voltage *
205 acpi_battery_vscale(battery) * 1000;
206 break;
207 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
208 val->intval = battery->voltage_now *
209 acpi_battery_vscale(battery) * 1000;
210 break;
211 case POWER_SUPPLY_PROP_CURRENT_NOW:
212 case POWER_SUPPLY_PROP_POWER_NOW:
213 val->intval = abs(battery->rate_now) *
214 acpi_battery_ipscale(battery) * 1000;
215 val->intval *= (acpi_battery_mode(battery)) ?
216 (battery->voltage_now *
217 acpi_battery_vscale(battery) / 1000) : 1;
218 break;
219 case POWER_SUPPLY_PROP_CURRENT_AVG:
220 case POWER_SUPPLY_PROP_POWER_AVG:
221 val->intval = abs(battery->rate_avg) *
222 acpi_battery_ipscale(battery) * 1000;
223 val->intval *= (acpi_battery_mode(battery)) ?
224 (battery->voltage_now *
225 acpi_battery_vscale(battery) / 1000) : 1;
226 break;
227 case POWER_SUPPLY_PROP_CAPACITY:
228 val->intval = battery->state_of_charge;
229 break;
230 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
231 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
232 val->intval = battery->design_capacity *
233 acpi_battery_scale(battery) * 1000;
234 break;
235 case POWER_SUPPLY_PROP_CHARGE_FULL:
236 case POWER_SUPPLY_PROP_ENERGY_FULL:
237 val->intval = battery->full_charge_capacity *
238 acpi_battery_scale(battery) * 1000;
239 break;
240 case POWER_SUPPLY_PROP_CHARGE_NOW:
241 case POWER_SUPPLY_PROP_ENERGY_NOW:
242 val->intval = battery->capacity_now *
243 acpi_battery_scale(battery) * 1000;
244 break;
245 case POWER_SUPPLY_PROP_TEMP:
246 val->intval = battery->temp_now - 2730; // dK -> dC
247 break;
248 case POWER_SUPPLY_PROP_MODEL_NAME:
249 val->strval = battery->device_name;
250 break;
251 case POWER_SUPPLY_PROP_MANUFACTURER:
252 val->strval = battery->manufacturer_name;
253 break;
254 default:
255 return -EINVAL;
256 }
257 return 0;
258}
259
260static enum power_supply_property sbs_ac_props[] = {
261 POWER_SUPPLY_PROP_ONLINE,
262};
263
264static enum power_supply_property sbs_charge_battery_props[] = {
265 POWER_SUPPLY_PROP_STATUS,
266 POWER_SUPPLY_PROP_PRESENT,
267 POWER_SUPPLY_PROP_TECHNOLOGY,
268 POWER_SUPPLY_PROP_CYCLE_COUNT,
269 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
270 POWER_SUPPLY_PROP_VOLTAGE_NOW,
271 POWER_SUPPLY_PROP_CURRENT_NOW,
272 POWER_SUPPLY_PROP_CURRENT_AVG,
273 POWER_SUPPLY_PROP_CAPACITY,
274 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
275 POWER_SUPPLY_PROP_CHARGE_FULL,
276 POWER_SUPPLY_PROP_CHARGE_NOW,
277 POWER_SUPPLY_PROP_TEMP,
278 POWER_SUPPLY_PROP_MODEL_NAME,
279 POWER_SUPPLY_PROP_MANUFACTURER,
280};
281
282static enum power_supply_property sbs_energy_battery_props[] = {
283 POWER_SUPPLY_PROP_STATUS,
284 POWER_SUPPLY_PROP_PRESENT,
285 POWER_SUPPLY_PROP_TECHNOLOGY,
286 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
287 POWER_SUPPLY_PROP_VOLTAGE_NOW,
288 POWER_SUPPLY_PROP_CURRENT_NOW,
289 POWER_SUPPLY_PROP_CURRENT_AVG,
290 POWER_SUPPLY_PROP_POWER_NOW,
291 POWER_SUPPLY_PROP_POWER_AVG,
292 POWER_SUPPLY_PROP_CAPACITY,
293 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
294 POWER_SUPPLY_PROP_ENERGY_FULL,
295 POWER_SUPPLY_PROP_ENERGY_NOW,
296 POWER_SUPPLY_PROP_TEMP,
297 POWER_SUPPLY_PROP_MODEL_NAME,
298 POWER_SUPPLY_PROP_MANUFACTURER,
299};
300
301static const struct power_supply_desc acpi_sbs_charger_desc = {
302 .name = "sbs-charger",
303 .type = POWER_SUPPLY_TYPE_MAINS,
304 .properties = sbs_ac_props,
305 .num_properties = ARRAY_SIZE(sbs_ac_props),
306 .get_property = sbs_get_ac_property,
307};
308
309/* --------------------------------------------------------------------------
310 Smart Battery System Management
311 -------------------------------------------------------------------------- */
312
313struct acpi_battery_reader {
314 u8 command; /* command for battery */
315 u8 mode; /* word or block? */
316 size_t offset; /* offset inside struct acpi_sbs_battery */
317};
318
319static struct acpi_battery_reader info_readers[] = {
320 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
321 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
322 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
323 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
324 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
325 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
326 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
327 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
328 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
329 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
330 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
331};
332
333static struct acpi_battery_reader state_readers[] = {
334 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
335 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
336 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
337 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
338 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
339 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
340 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
341};
342
343static int acpi_manager_get_info(struct acpi_sbs *sbs)
344{
345 int result = 0;
346 u16 battery_system_info;
347
348 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
349 0x04, (u8 *)&battery_system_info);
350 if (!result)
351 sbs->batteries_supported = battery_system_info & 0x000f;
352 return result;
353}
354
355static int acpi_battery_get_info(struct acpi_battery *battery)
356{
357 int i, result = 0;
358
359 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
360 result = acpi_smbus_read(battery->sbs->hc,
361 info_readers[i].mode,
362 ACPI_SBS_BATTERY,
363 info_readers[i].command,
364 (u8 *) battery +
365 info_readers[i].offset);
366 if (result)
367 break;
368 }
369 return result;
370}
371
372static int acpi_battery_get_state(struct acpi_battery *battery)
373{
374 int i, result = 0;
375
376 if (battery->update_time &&
377 time_before(jiffies, battery->update_time +
378 msecs_to_jiffies(cache_time)))
379 return 0;
380 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
381 result = acpi_smbus_read(battery->sbs->hc,
382 state_readers[i].mode,
383 ACPI_SBS_BATTERY,
384 state_readers[i].command,
385 (u8 *)battery +
386 state_readers[i].offset);
387 if (result)
388 goto end;
389 }
390 end:
391 battery->update_time = jiffies;
392 return result;
393}
394
395static int acpi_battery_get_alarm(struct acpi_battery *battery)
396{
397 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
398 ACPI_SBS_BATTERY, 0x01,
399 (u8 *)&battery->alarm_capacity);
400}
401
402static int acpi_battery_set_alarm(struct acpi_battery *battery)
403{
404 struct acpi_sbs *sbs = battery->sbs;
405 u16 value, sel = 1 << (battery->id + 12);
406
407 int ret;
408
409
410 if (sbs->manager_present) {
411 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
412 0x01, (u8 *)&value);
413 if (ret)
414 goto end;
415 if ((value & 0xf000) != sel) {
416 value &= 0x0fff;
417 value |= sel;
418 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
419 ACPI_SBS_MANAGER,
420 0x01, (u8 *)&value, 2);
421 if (ret)
422 goto end;
423 }
424 }
425 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
426 0x01, (u8 *)&battery->alarm_capacity, 2);
427 end:
428 return ret;
429}
430
431static int acpi_ac_get_present(struct acpi_sbs *sbs)
432{
433 int result;
434 u16 status;
435
436 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
437 0x13, (u8 *) & status);
438
439 if (result)
440 return result;
441
442 /*
443 * The spec requires that bit 4 always be 1. If it's not set, assume
444 * that the implementation doesn't support an SBS charger
445 */
446 if (!((status >> 4) & 0x1))
447 return -ENODEV;
448
449 sbs->charger_present = (status >> 15) & 0x1;
450 return 0;
451}
452
453static ssize_t acpi_battery_alarm_show(struct device *dev,
454 struct device_attribute *attr,
455 char *buf)
456{
457 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
458 acpi_battery_get_alarm(battery);
459 return sprintf(buf, "%d\n", battery->alarm_capacity *
460 acpi_battery_scale(battery) * 1000);
461}
462
463static ssize_t acpi_battery_alarm_store(struct device *dev,
464 struct device_attribute *attr,
465 const char *buf, size_t count)
466{
467 unsigned long x;
468 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
469 if (sscanf(buf, "%lu\n", &x) == 1)
470 battery->alarm_capacity = x /
471 (1000 * acpi_battery_scale(battery));
472 if (battery->present)
473 acpi_battery_set_alarm(battery);
474 return count;
475}
476
477static const struct device_attribute alarm_attr = {
478 .attr = {.name = "alarm", .mode = 0644},
479 .show = acpi_battery_alarm_show,
480 .store = acpi_battery_alarm_store,
481};
482
483/* --------------------------------------------------------------------------
484 Driver Interface
485 -------------------------------------------------------------------------- */
486static int acpi_battery_read(struct acpi_battery *battery)
487{
488 int result = 0, saved_present = battery->present;
489 u16 state;
490
491 if (battery->sbs->manager_present) {
492 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
493 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
494 if (!result)
495 battery->present = state & (1 << battery->id);
496 state &= 0x0fff;
497 state |= 1 << (battery->id + 12);
498 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
499 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
500 } else if (battery->id == 0)
501 battery->present = 1;
502
503 if (result || !battery->present)
504 return result;
505
506 if (saved_present != battery->present) {
507 battery->update_time = 0;
508 result = acpi_battery_get_info(battery);
509 if (result) {
510 battery->present = 0;
511 return result;
512 }
513 }
514 result = acpi_battery_get_state(battery);
515 if (result)
516 battery->present = 0;
517 return result;
518}
519
520/* Smart Battery */
521static int acpi_battery_add(struct acpi_sbs *sbs, int id)
522{
523 struct acpi_battery *battery = &sbs->battery[id];
524 struct power_supply_config psy_cfg = { .drv_data = battery, };
525 int result;
526
527 battery->id = id;
528 battery->sbs = sbs;
529 result = acpi_battery_read(battery);
530 if (result)
531 return result;
532
533 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
534 battery->bat_desc.name = battery->name;
535 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
536 if (!acpi_battery_mode(battery)) {
537 battery->bat_desc.properties = sbs_charge_battery_props;
538 battery->bat_desc.num_properties =
539 ARRAY_SIZE(sbs_charge_battery_props);
540 } else {
541 battery->bat_desc.properties = sbs_energy_battery_props;
542 battery->bat_desc.num_properties =
543 ARRAY_SIZE(sbs_energy_battery_props);
544 }
545 battery->bat_desc.get_property = acpi_sbs_battery_get_property;
546 battery->bat = power_supply_register(&sbs->device->dev,
547 &battery->bat_desc, &psy_cfg);
548 if (IS_ERR(battery->bat)) {
549 result = PTR_ERR(battery->bat);
550 battery->bat = NULL;
551 goto end;
552 }
553
554 result = device_create_file(&battery->bat->dev, &alarm_attr);
555 if (result)
556 goto end;
557 battery->have_sysfs_alarm = 1;
558 end:
559 printk(KERN_INFO PREFIX "%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 if (battery->have_sysfs_alarm)
571 device_remove_file(&battery->bat->dev, &alarm_attr);
572 power_supply_unregister(battery->bat);
573 }
574}
575
576static int acpi_charger_add(struct acpi_sbs *sbs)
577{
578 int result;
579 struct power_supply_config psy_cfg = { .drv_data = sbs, };
580
581 result = acpi_ac_get_present(sbs);
582 if (result)
583 goto end;
584
585 sbs->charger_exists = 1;
586 sbs->charger = power_supply_register(&sbs->device->dev,
587 &acpi_sbs_charger_desc, &psy_cfg);
588 if (IS_ERR(sbs->charger)) {
589 result = PTR_ERR(sbs->charger);
590 sbs->charger = NULL;
591 }
592 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
593 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
594 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
595 end:
596 return result;
597}
598
599static void acpi_charger_remove(struct acpi_sbs *sbs)
600{
601 if (sbs->charger)
602 power_supply_unregister(sbs->charger);
603}
604
605static void acpi_sbs_callback(void *context)
606{
607 int id;
608 struct acpi_sbs *sbs = context;
609 struct acpi_battery *bat;
610 u8 saved_charger_state = sbs->charger_present;
611 u8 saved_battery_state;
612
613 if (sbs->charger_exists) {
614 acpi_ac_get_present(sbs);
615 if (sbs->charger_present != saved_charger_state)
616 kobject_uevent(&sbs->charger->dev.kobj, KOBJ_CHANGE);
617 }
618
619 if (sbs->manager_present) {
620 for (id = 0; id < MAX_SBS_BAT; ++id) {
621 if (!(sbs->batteries_supported & (1 << id)))
622 continue;
623 bat = &sbs->battery[id];
624 saved_battery_state = bat->present;
625 acpi_battery_read(bat);
626 if (saved_battery_state == bat->present)
627 continue;
628 kobject_uevent(&bat->bat->dev.kobj, KOBJ_CHANGE);
629 }
630 }
631}
632
633static int acpi_sbs_add(struct acpi_device *device)
634{
635 struct acpi_sbs *sbs;
636 int result = 0;
637 int id;
638
639 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
640 if (!sbs) {
641 result = -ENOMEM;
642 goto end;
643 }
644
645 mutex_init(&sbs->lock);
646
647 sbs->hc = acpi_driver_data(device->parent);
648 sbs->device = device;
649 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
650 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
651 device->driver_data = sbs;
652
653 result = acpi_charger_add(sbs);
654 if (result && result != -ENODEV)
655 goto end;
656
657 result = 0;
658
659 if (!x86_apple_machine) {
660 result = acpi_manager_get_info(sbs);
661 if (!result) {
662 sbs->manager_present = 1;
663 for (id = 0; id < MAX_SBS_BAT; ++id)
664 if ((sbs->batteries_supported & (1 << id)))
665 acpi_battery_add(sbs, id);
666 }
667 }
668
669 if (!sbs->manager_present)
670 acpi_battery_add(sbs, 0);
671
672 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
673 end:
674 if (result)
675 acpi_sbs_remove(device);
676 return result;
677}
678
679static int acpi_sbs_remove(struct acpi_device *device)
680{
681 struct acpi_sbs *sbs;
682 int id;
683
684 if (!device)
685 return -EINVAL;
686 sbs = acpi_driver_data(device);
687 if (!sbs)
688 return -EINVAL;
689 mutex_lock(&sbs->lock);
690 acpi_smbus_unregister_callback(sbs->hc);
691 for (id = 0; id < MAX_SBS_BAT; ++id)
692 acpi_battery_remove(sbs, id);
693 acpi_charger_remove(sbs);
694 mutex_unlock(&sbs->lock);
695 mutex_destroy(&sbs->lock);
696 kfree(sbs);
697 return 0;
698}
699
700#ifdef CONFIG_PM_SLEEP
701static int acpi_sbs_resume(struct device *dev)
702{
703 struct acpi_sbs *sbs;
704 if (!dev)
705 return -EINVAL;
706 sbs = to_acpi_device(dev)->driver_data;
707 acpi_sbs_callback(sbs);
708 return 0;
709}
710#else
711#define acpi_sbs_resume NULL
712#endif
713
714static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);
715
716static struct acpi_driver acpi_sbs_driver = {
717 .name = "sbs",
718 .class = ACPI_SBS_CLASS,
719 .ids = sbs_device_ids,
720 .ops = {
721 .add = acpi_sbs_add,
722 .remove = acpi_sbs_remove,
723 },
724 .drv.pm = &acpi_sbs_pm,
725};
726
727static int __init acpi_sbs_init(void)
728{
729 int result = 0;
730
731 if (acpi_disabled)
732 return -ENODEV;
733
734 result = acpi_bus_register_driver(&acpi_sbs_driver);
735 if (result < 0)
736 return -ENODEV;
737
738 return 0;
739}
740
741static void __exit acpi_sbs_exit(void)
742{
743 acpi_bus_unregister_driver(&acpi_sbs_driver);
744 return;
745}
746
747module_init(acpi_sbs_init);
748module_exit(acpi_sbs_exit);