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timekeeping: Add debugging checks to warn if we see delays
[linux-2.6/btrfs-unstable.git] / drivers / acpi / sbs.c
bloba7a3edd28beb8d5f881ef891075e0f650e0482de
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 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/kernel.h>
32
33 #include <linux/acpi.h>
34 #include <linux/timer.h>
35 #include <linux/jiffies.h>
36 #include <linux/delay.h>
37 #include <linux/power_supply.h>
38 #include <linux/dmi.h>
39
40 #include "sbshc.h"
41 #include "battery.h"
42
43 #define PREFIX "ACPI: "
44
45 #define ACPI_SBS_CLASS "sbs"
46 #define ACPI_AC_CLASS "ac_adapter"
47 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
48 #define ACPI_SBS_FILE_INFO "info"
49 #define ACPI_SBS_FILE_STATE "state"
50 #define ACPI_SBS_FILE_ALARM "alarm"
51 #define ACPI_BATTERY_DIR_NAME "BAT%i"
52 #define ACPI_AC_DIR_NAME "AC0"
53
54 #define ACPI_SBS_NOTIFY_STATUS 0x80
55 #define ACPI_SBS_NOTIFY_INFO 0x81
56
57 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
58 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
59 MODULE_LICENSE("GPL");
60
61 static unsigned int cache_time = 1000;
62 module_param(cache_time, uint, 0644);
63 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
64
65 static bool sbs_manager_broken;
66
67 #define MAX_SBS_BAT 4
68 #define ACPI_SBS_BLOCK_MAX 32
69
70 static const struct acpi_device_id sbs_device_ids[] = {
71 {"ACPI0002", 0},
72 {"", 0},
73 };
74 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
75
76 struct acpi_battery {
77 struct power_supply bat;
78 struct acpi_sbs *sbs;
79 unsigned long update_time;
80 char name[8];
81 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
82 char device_name[ACPI_SBS_BLOCK_MAX];
83 char device_chemistry[ACPI_SBS_BLOCK_MAX];
84 u16 alarm_capacity;
85 u16 full_charge_capacity;
86 u16 design_capacity;
87 u16 design_voltage;
88 u16 serial_number;
89 u16 cycle_count;
90 u16 temp_now;
91 u16 voltage_now;
92 s16 rate_now;
93 s16 rate_avg;
94 u16 capacity_now;
95 u16 state_of_charge;
96 u16 state;
97 u16 mode;
98 u16 spec;
99 u8 id;
100 u8 present:1;
101 u8 have_sysfs_alarm:1;
102 };
103
104 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat)
105
106 struct acpi_sbs {
107 struct power_supply charger;
108 struct acpi_device *device;
109 struct acpi_smb_hc *hc;
110 struct mutex lock;
111 struct acpi_battery battery[MAX_SBS_BAT];
112 u8 batteries_supported:4;
113 u8 manager_present:1;
114 u8 charger_present:1;
115 u8 charger_exists:1;
116 };
117
118 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
119
120 static int acpi_sbs_remove(struct acpi_device *device);
121 static int acpi_battery_get_state(struct acpi_battery *battery);
122
123 static inline int battery_scale(int log)
124 {
125 int scale = 1;
126 while (log--)
127 scale *= 10;
128 return scale;
129 }
130
131 static inline int acpi_battery_vscale(struct acpi_battery *battery)
132 {
133 return battery_scale((battery->spec & 0x0f00) >> 8);
134 }
135
136 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
137 {
138 return battery_scale((battery->spec & 0xf000) >> 12);
139 }
140
141 static inline int acpi_battery_mode(struct acpi_battery *battery)
142 {
143 return (battery->mode & 0x8000);
144 }
145
146 static inline int acpi_battery_scale(struct acpi_battery *battery)
147 {
148 return (acpi_battery_mode(battery) ? 10 : 1) *
149 acpi_battery_ipscale(battery);
150 }
151
152 static int sbs_get_ac_property(struct power_supply *psy,
153 enum power_supply_property psp,
154 union power_supply_propval *val)
155 {
156 struct acpi_sbs *sbs = to_acpi_sbs(psy);
157 switch (psp) {
158 case POWER_SUPPLY_PROP_ONLINE:
159 val->intval = sbs->charger_present;
160 break;
161 default:
162 return -EINVAL;
163 }
164 return 0;
165 }
166
167 static int acpi_battery_technology(struct acpi_battery *battery)
168 {
169 if (!strcasecmp("NiCd", battery->device_chemistry))
170 return POWER_SUPPLY_TECHNOLOGY_NiCd;
171 if (!strcasecmp("NiMH", battery->device_chemistry))
172 return POWER_SUPPLY_TECHNOLOGY_NiMH;
173 if (!strcasecmp("LION", battery->device_chemistry))
174 return POWER_SUPPLY_TECHNOLOGY_LION;
175 if (!strcasecmp("LiP", battery->device_chemistry))
176 return POWER_SUPPLY_TECHNOLOGY_LIPO;
177 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
178 }
179
180 static int acpi_sbs_battery_get_property(struct power_supply *psy,
181 enum power_supply_property psp,
182 union power_supply_propval *val)
183 {
184 struct acpi_battery *battery = to_acpi_battery(psy);
185
186 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
187 return -ENODEV;
188
189 acpi_battery_get_state(battery);
190 switch (psp) {
191 case POWER_SUPPLY_PROP_STATUS:
192 if (battery->rate_now < 0)
193 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
194 else if (battery->rate_now > 0)
195 val->intval = POWER_SUPPLY_STATUS_CHARGING;
196 else
197 val->intval = POWER_SUPPLY_STATUS_FULL;
198 break;
199 case POWER_SUPPLY_PROP_PRESENT:
200 val->intval = battery->present;
201 break;
202 case POWER_SUPPLY_PROP_TECHNOLOGY:
203 val->intval = acpi_battery_technology(battery);
204 break;
205 case POWER_SUPPLY_PROP_CYCLE_COUNT:
206 val->intval = battery->cycle_count;
207 break;
208 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
209 val->intval = battery->design_voltage *
210 acpi_battery_vscale(battery) * 1000;
211 break;
212 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
213 val->intval = battery->voltage_now *
214 acpi_battery_vscale(battery) * 1000;
215 break;
216 case POWER_SUPPLY_PROP_CURRENT_NOW:
217 case POWER_SUPPLY_PROP_POWER_NOW:
218 val->intval = abs(battery->rate_now) *
219 acpi_battery_ipscale(battery) * 1000;
220 val->intval *= (acpi_battery_mode(battery)) ?
221 (battery->voltage_now *
222 acpi_battery_vscale(battery) / 1000) : 1;
223 break;
224 case POWER_SUPPLY_PROP_CURRENT_AVG:
225 case POWER_SUPPLY_PROP_POWER_AVG:
226 val->intval = abs(battery->rate_avg) *
227 acpi_battery_ipscale(battery) * 1000;
228 val->intval *= (acpi_battery_mode(battery)) ?
229 (battery->voltage_now *
230 acpi_battery_vscale(battery) / 1000) : 1;
231 break;
232 case POWER_SUPPLY_PROP_CAPACITY:
233 val->intval = battery->state_of_charge;
234 break;
235 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
236 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
237 val->intval = battery->design_capacity *
238 acpi_battery_scale(battery) * 1000;
239 break;
240 case POWER_SUPPLY_PROP_CHARGE_FULL:
241 case POWER_SUPPLY_PROP_ENERGY_FULL:
242 val->intval = battery->full_charge_capacity *
243 acpi_battery_scale(battery) * 1000;
244 break;
245 case POWER_SUPPLY_PROP_CHARGE_NOW:
246 case POWER_SUPPLY_PROP_ENERGY_NOW:
247 val->intval = battery->capacity_now *
248 acpi_battery_scale(battery) * 1000;
249 break;
250 case POWER_SUPPLY_PROP_TEMP:
251 val->intval = battery->temp_now - 2730; // dK -> dC
252 break;
253 case POWER_SUPPLY_PROP_MODEL_NAME:
254 val->strval = battery->device_name;
255 break;
256 case POWER_SUPPLY_PROP_MANUFACTURER:
257 val->strval = battery->manufacturer_name;
258 break;
259 default:
260 return -EINVAL;
261 }
262 return 0;
263 }
264
265 static enum power_supply_property sbs_ac_props[] = {
266 POWER_SUPPLY_PROP_ONLINE,
267 };
268
269 static enum power_supply_property sbs_charge_battery_props[] = {
270 POWER_SUPPLY_PROP_STATUS,
271 POWER_SUPPLY_PROP_PRESENT,
272 POWER_SUPPLY_PROP_TECHNOLOGY,
273 POWER_SUPPLY_PROP_CYCLE_COUNT,
274 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
275 POWER_SUPPLY_PROP_VOLTAGE_NOW,
276 POWER_SUPPLY_PROP_CURRENT_NOW,
277 POWER_SUPPLY_PROP_CURRENT_AVG,
278 POWER_SUPPLY_PROP_CAPACITY,
279 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
280 POWER_SUPPLY_PROP_CHARGE_FULL,
281 POWER_SUPPLY_PROP_CHARGE_NOW,
282 POWER_SUPPLY_PROP_TEMP,
283 POWER_SUPPLY_PROP_MODEL_NAME,
284 POWER_SUPPLY_PROP_MANUFACTURER,
285 };
286
287 static enum power_supply_property sbs_energy_battery_props[] = {
288 POWER_SUPPLY_PROP_STATUS,
289 POWER_SUPPLY_PROP_PRESENT,
290 POWER_SUPPLY_PROP_TECHNOLOGY,
291 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
292 POWER_SUPPLY_PROP_VOLTAGE_NOW,
293 POWER_SUPPLY_PROP_CURRENT_NOW,
294 POWER_SUPPLY_PROP_CURRENT_AVG,
295 POWER_SUPPLY_PROP_POWER_NOW,
296 POWER_SUPPLY_PROP_POWER_AVG,
297 POWER_SUPPLY_PROP_CAPACITY,
298 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
299 POWER_SUPPLY_PROP_ENERGY_FULL,
300 POWER_SUPPLY_PROP_ENERGY_NOW,
301 POWER_SUPPLY_PROP_TEMP,
302 POWER_SUPPLY_PROP_MODEL_NAME,
303 POWER_SUPPLY_PROP_MANUFACTURER,
304 };
305
306
307 /* --------------------------------------------------------------------------
308 Smart Battery System Management
309 -------------------------------------------------------------------------- */
310
311 struct acpi_battery_reader {
312 u8 command; /* command for battery */
313 u8 mode; /* word or block? */
314 size_t offset; /* offset inside struct acpi_sbs_battery */
315 };
316
317 static struct acpi_battery_reader info_readers[] = {
318 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
319 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
320 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
321 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
322 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
323 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
324 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
325 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
326 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
327 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
328 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
329 };
330
331 static struct acpi_battery_reader state_readers[] = {
332 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
333 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
334 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
335 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
336 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
337 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
338 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
339 };
340
341 static int acpi_manager_get_info(struct acpi_sbs *sbs)
342 {
343 int result = 0;
344 u16 battery_system_info;
345
346 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
347 0x04, (u8 *)&battery_system_info);
348 if (!result)
349 sbs->batteries_supported = battery_system_info & 0x000f;
350 return result;
351 }
352
353 static int acpi_battery_get_info(struct acpi_battery *battery)
354 {
355 int i, result = 0;
356
357 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
358 result = acpi_smbus_read(battery->sbs->hc,
359 info_readers[i].mode,
360 ACPI_SBS_BATTERY,
361 info_readers[i].command,
362 (u8 *) battery +
363 info_readers[i].offset);
364 if (result)
365 break;
366 }
367 return result;
368 }
369
370 static int acpi_battery_get_state(struct acpi_battery *battery)
371 {
372 int i, result = 0;
373
374 if (battery->update_time &&
375 time_before(jiffies, battery->update_time +
376 msecs_to_jiffies(cache_time)))
377 return 0;
378 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
379 result = acpi_smbus_read(battery->sbs->hc,
380 state_readers[i].mode,
381 ACPI_SBS_BATTERY,
382 state_readers[i].command,
383 (u8 *)battery +
384 state_readers[i].offset);
385 if (result)
386 goto end;
387 }
388 end:
389 battery->update_time = jiffies;
390 return result;
391 }
392
393 static int acpi_battery_get_alarm(struct acpi_battery *battery)
394 {
395 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
396 ACPI_SBS_BATTERY, 0x01,
397 (u8 *)&battery->alarm_capacity);
398 }
399
400 static int acpi_battery_set_alarm(struct acpi_battery *battery)
401 {
402 struct acpi_sbs *sbs = battery->sbs;
403 u16 value, sel = 1 << (battery->id + 12);
404
405 int ret;
406
407
408 if (sbs->manager_present) {
409 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
410 0x01, (u8 *)&value);
411 if (ret)
412 goto end;
413 if ((value & 0xf000) != sel) {
414 value &= 0x0fff;
415 value |= sel;
416 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
417 ACPI_SBS_MANAGER,
418 0x01, (u8 *)&value, 2);
419 if (ret)
420 goto end;
421 }
422 }
423 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
424 0x01, (u8 *)&battery->alarm_capacity, 2);
425 end:
426 return ret;
427 }
428
429 static int acpi_ac_get_present(struct acpi_sbs *sbs)
430 {
431 int result;
432 u16 status;
433
434 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
435 0x13, (u8 *) & status);
436
437 if (result)
438 return result;
439
440 /*
441 * The spec requires that bit 4 always be 1. If it's not set, assume
442 * that the implementation doesn't support an SBS charger
443 */
444 if (!((status >> 4) & 0x1))
445 return -ENODEV;
446
447 sbs->charger_present = (status >> 15) & 0x1;
448 return 0;
449 }
450
451 static ssize_t acpi_battery_alarm_show(struct device *dev,
452 struct device_attribute *attr,
453 char *buf)
454 {
455 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
456 acpi_battery_get_alarm(battery);
457 return sprintf(buf, "%d\n", battery->alarm_capacity *
458 acpi_battery_scale(battery) * 1000);
459 }
460
461 static ssize_t acpi_battery_alarm_store(struct device *dev,
462 struct device_attribute *attr,
463 const char *buf, size_t count)
464 {
465 unsigned long x;
466 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
467 if (sscanf(buf, "%lu\n", &x) == 1)
468 battery->alarm_capacity = x /
469 (1000 * acpi_battery_scale(battery));
470 if (battery->present)
471 acpi_battery_set_alarm(battery);
472 return count;
473 }
474
475 static struct device_attribute alarm_attr = {
476 .attr = {.name = "alarm", .mode = 0644},
477 .show = acpi_battery_alarm_show,
478 .store = acpi_battery_alarm_store,
479 };
480
481 /* --------------------------------------------------------------------------
482 Driver Interface
483 -------------------------------------------------------------------------- */
484 static int acpi_battery_read(struct acpi_battery *battery)
485 {
486 int result = 0, saved_present = battery->present;
487 u16 state;
488
489 if (battery->sbs->manager_present) {
490 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
491 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
492 if (!result)
493 battery->present = state & (1 << battery->id);
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 if (battery->id == 0)
499 battery->present = 1;
500
501 if (result || !battery->present)
502 return result;
503
504 if (saved_present != battery->present) {
505 battery->update_time = 0;
506 result = acpi_battery_get_info(battery);
507 if (result) {
508 battery->present = 0;
509 return result;
510 }
511 }
512 result = acpi_battery_get_state(battery);
513 if (result)
514 battery->present = 0;
515 return result;
516 }
517
518 /* Smart Battery */
519 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
520 {
521 struct acpi_battery *battery = &sbs->battery[id];
522 int result;
523
524 battery->id = id;
525 battery->sbs = sbs;
526 result = acpi_battery_read(battery);
527 if (result)
528 return result;
529
530 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
531 battery->bat.name = battery->name;
532 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
533 if (!acpi_battery_mode(battery)) {
534 battery->bat.properties = sbs_charge_battery_props;
535 battery->bat.num_properties =
536 ARRAY_SIZE(sbs_charge_battery_props);
537 } else {
538 battery->bat.properties = sbs_energy_battery_props;
539 battery->bat.num_properties =
540 ARRAY_SIZE(sbs_energy_battery_props);
541 }
542 battery->bat.get_property = acpi_sbs_battery_get_property;
543 result = power_supply_register(&sbs->device->dev, &battery->bat);
544 if (result)
545 goto end;
546
547 result = device_create_file(battery->bat.dev, &alarm_attr);
548 if (result)
549 goto end;
550 battery->have_sysfs_alarm = 1;
551 end:
552 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
553 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
554 battery->name, battery->present ? "present" : "absent");
555 return result;
556 }
557
558 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
559 {
560 struct acpi_battery *battery = &sbs->battery[id];
561
562 if (battery->bat.dev) {
563 if (battery->have_sysfs_alarm)
564 device_remove_file(battery->bat.dev, &alarm_attr);
565 power_supply_unregister(&battery->bat);
566 }
567 }
568
569 static int acpi_charger_add(struct acpi_sbs *sbs)
570 {
571 int result;
572
573 result = acpi_ac_get_present(sbs);
574 if (result)
575 goto end;
576
577 sbs->charger_exists = 1;
578 sbs->charger.name = "sbs-charger";
579 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
580 sbs->charger.properties = sbs_ac_props;
581 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
582 sbs->charger.get_property = sbs_get_ac_property;
583 power_supply_register(&sbs->device->dev, &sbs->charger);
584 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
585 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
586 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
587 end:
588 return result;
589 }
590
591 static void acpi_charger_remove(struct acpi_sbs *sbs)
592 {
593 if (sbs->charger.dev)
594 power_supply_unregister(&sbs->charger);
595 }
596
597 static void acpi_sbs_callback(void *context)
598 {
599 int id;
600 struct acpi_sbs *sbs = context;
601 struct acpi_battery *bat;
602 u8 saved_charger_state = sbs->charger_present;
603 u8 saved_battery_state;
604
605 if (sbs->charger_exists) {
606 acpi_ac_get_present(sbs);
607 if (sbs->charger_present != saved_charger_state)
608 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
609 }
610
611 if (sbs->manager_present) {
612 for (id = 0; id < MAX_SBS_BAT; ++id) {
613 if (!(sbs->batteries_supported & (1 << id)))
614 continue;
615 bat = &sbs->battery[id];
616 saved_battery_state = bat->present;
617 acpi_battery_read(bat);
618 if (saved_battery_state == bat->present)
619 continue;
620 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
621 }
622 }
623 }
624
625 static int disable_sbs_manager(const struct dmi_system_id *d)
626 {
627 sbs_manager_broken = true;
628 return 0;
629 }
630
631 static struct dmi_system_id acpi_sbs_dmi_table[] = {
632 {
633 .callback = disable_sbs_manager,
634 .ident = "Apple",
635 .matches = {
636 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc.")
637 },
638 },
639 { },
640 };
641
642 static int acpi_sbs_add(struct acpi_device *device)
643 {
644 struct acpi_sbs *sbs;
645 int result = 0;
646 int id;
647
648 dmi_check_system(acpi_sbs_dmi_table);
649
650 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
651 if (!sbs) {
652 result = -ENOMEM;
653 goto end;
654 }
655
656 mutex_init(&sbs->lock);
657
658 sbs->hc = acpi_driver_data(device->parent);
659 sbs->device = device;
660 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
661 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
662 device->driver_data = sbs;
663
664 result = acpi_charger_add(sbs);
665 if (result && result != -ENODEV)
666 goto end;
667
668 result = 0;
669
670 if (!sbs_manager_broken) {
671 result = acpi_manager_get_info(sbs);
672 if (!result) {
673 sbs->manager_present = 0;
674 for (id = 0; id < MAX_SBS_BAT; ++id)
675 if ((sbs->batteries_supported & (1 << id)))
676 acpi_battery_add(sbs, id);
677 }
678 }
679
680 if (!sbs->manager_present)
681 acpi_battery_add(sbs, 0);
682
683 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
684 end:
685 if (result)
686 acpi_sbs_remove(device);
687 return result;
688 }
689
690 static int acpi_sbs_remove(struct acpi_device *device)
691 {
692 struct acpi_sbs *sbs;
693 int id;
694
695 if (!device)
696 return -EINVAL;
697 sbs = acpi_driver_data(device);
698 if (!sbs)
699 return -EINVAL;
700 mutex_lock(&sbs->lock);
701 acpi_smbus_unregister_callback(sbs->hc);
702 for (id = 0; id < MAX_SBS_BAT; ++id)
703 acpi_battery_remove(sbs, id);
704 acpi_charger_remove(sbs);
705 mutex_unlock(&sbs->lock);
706 mutex_destroy(&sbs->lock);
707 kfree(sbs);
708 return 0;
709 }
710
711 #ifdef CONFIG_PM_SLEEP
712 static int acpi_sbs_resume(struct device *dev)
713 {
714 struct acpi_sbs *sbs;
715 if (!dev)
716 return -EINVAL;
717 sbs = to_acpi_device(dev)->driver_data;
718 acpi_sbs_callback(sbs);
719 return 0;
720 }
721 #else
722 #define acpi_sbs_resume NULL
723 #endif
724
725 static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);
726
727 static struct acpi_driver acpi_sbs_driver = {
728 .name = "sbs",
729 .class = ACPI_SBS_CLASS,
730 .ids = sbs_device_ids,
731 .ops = {
732 .add = acpi_sbs_add,
733 .remove = acpi_sbs_remove,
734 },
735 .drv.pm = &acpi_sbs_pm,
736 };
737
738 static int __init acpi_sbs_init(void)
739 {
740 int result = 0;
741
742 if (acpi_disabled)
743 return -ENODEV;
744
745 result = acpi_bus_register_driver(&acpi_sbs_driver);
746 if (result < 0)
747 return -ENODEV;
748
749 return 0;
750 }
751
752 static void __exit acpi_sbs_exit(void)
753 {
754 acpi_bus_unregister_driver(&acpi_sbs_driver);
755 return;
756 }
757
758 module_init(acpi_sbs_init);
759 module_exit(acpi_sbs_exit);
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