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[linux-2.6/linux-loongson.git] / drivers / acpi / sbs.c
bloba578986e3214fc9b479ef6978d645e9002137bed
1 /*
2 * acpi_sbs.c - ACPI Smart Battery System Driver ($Revision: 1.16 $)
3 *
4 * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 */
24
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/kernel.h>
29 #include <linux/proc_fs.h>
30 #include <linux/seq_file.h>
31 #include <asm/uaccess.h>
32 #include <linux/acpi.h>
33 #include <linux/timer.h>
34 #include <linux/jiffies.h>
35 #include <linux/delay.h>
36
37 #define ACPI_SBS_COMPONENT 0x00080000
38 #define ACPI_SBS_CLASS "sbs"
39 #define ACPI_AC_CLASS "ac_adapter"
40 #define ACPI_BATTERY_CLASS "battery"
41 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
42 #define ACPI_SBS_FILE_INFO "info"
43 #define ACPI_SBS_FILE_STATE "state"
44 #define ACPI_SBS_FILE_ALARM "alarm"
45 #define ACPI_BATTERY_DIR_NAME "BAT%i"
46 #define ACPI_AC_DIR_NAME "AC0"
47 #define ACPI_SBC_SMBUS_ADDR 0x9
48 #define ACPI_SBSM_SMBUS_ADDR 0xa
49 #define ACPI_SB_SMBUS_ADDR 0xb
50 #define ACPI_SBS_AC_NOTIFY_STATUS 0x80
51 #define ACPI_SBS_BATTERY_NOTIFY_STATUS 0x80
52 #define ACPI_SBS_BATTERY_NOTIFY_INFO 0x81
53
54 #define _COMPONENT ACPI_SBS_COMPONENT
55
56 ACPI_MODULE_NAME("sbs");
57
58 MODULE_AUTHOR("Rich Townsend");
59 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
60 MODULE_LICENSE("GPL");
61
62 #define xmsleep(t) msleep(t)
63
64 #define ACPI_EC_SMB_PRTCL 0x00 /* protocol, PEC */
65
66 #define ACPI_EC_SMB_STS 0x01 /* status */
67 #define ACPI_EC_SMB_ADDR 0x02 /* address */
68 #define ACPI_EC_SMB_CMD 0x03 /* command */
69 #define ACPI_EC_SMB_DATA 0x04 /* 32 data registers */
70 #define ACPI_EC_SMB_BCNT 0x24 /* number of data bytes */
71
72 #define ACPI_EC_SMB_STS_DONE 0x80
73 #define ACPI_EC_SMB_STS_STATUS 0x1f
74
75 #define ACPI_EC_SMB_PRTCL_WRITE 0x00
76 #define ACPI_EC_SMB_PRTCL_READ 0x01
77 #define ACPI_EC_SMB_PRTCL_WORD_DATA 0x08
78 #define ACPI_EC_SMB_PRTCL_BLOCK_DATA 0x0a
79
80 #define ACPI_EC_SMB_TRANSACTION_SLEEP 1
81 #define ACPI_EC_SMB_ACCESS_SLEEP1 1
82 #define ACPI_EC_SMB_ACCESS_SLEEP2 10
83
84 #define DEF_CAPACITY_UNIT 3
85 #define MAH_CAPACITY_UNIT 1
86 #define MWH_CAPACITY_UNIT 2
87 #define CAPACITY_UNIT DEF_CAPACITY_UNIT
88
89 #define REQUEST_UPDATE_MODE 1
90 #define QUEUE_UPDATE_MODE 2
91
92 #define DATA_TYPE_COMMON 0
93 #define DATA_TYPE_INFO 1
94 #define DATA_TYPE_STATE 2
95 #define DATA_TYPE_ALARM 3
96 #define DATA_TYPE_AC_STATE 4
97
98 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
99 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
100 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
101 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
102
103 #define MAX_SBS_BAT 4
104 #define ACPI_SBS_BLOCK_MAX 32
105
106 #define ACPI_SBS_SMBUS_READ 1
107 #define ACPI_SBS_SMBUS_WRITE 2
108
109 #define ACPI_SBS_WORD_DATA 1
110 #define ACPI_SBS_BLOCK_DATA 2
111
112 #define UPDATE_DELAY 10
113
114 /* 0 - every time, > 0 - by update_time */
115 static unsigned int update_time = 120;
116
117 static unsigned int capacity_mode = CAPACITY_UNIT;
118
119 module_param(update_time, uint, 0644);
120 module_param(capacity_mode, uint, 0444);
121
122 static int acpi_sbs_add(struct acpi_device *device);
123 static int acpi_sbs_remove(struct acpi_device *device, int type);
124 static int acpi_sbs_resume(struct acpi_device *device);
125
126 static const struct acpi_device_id sbs_device_ids[] = {
127 {"ACPI0001", 0},
128 {"ACPI0005", 0},
129 {"", 0},
130 };
131 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
132
133 static struct acpi_driver acpi_sbs_driver = {
134 .name = "sbs",
135 .class = ACPI_SBS_CLASS,
136 .ids = sbs_device_ids,
137 .ops = {
138 .add = acpi_sbs_add,
139 .remove = acpi_sbs_remove,
140 .resume = acpi_sbs_resume,
141 },
142 };
143
144 struct acpi_ac {
145 int ac_present;
146 };
147
148 struct acpi_battery_info {
149 int capacity_mode;
150 s16 full_charge_capacity;
151 s16 design_capacity;
152 s16 design_voltage;
153 int vscale;
154 int ipscale;
155 s16 serial_number;
156 char manufacturer_name[ACPI_SBS_BLOCK_MAX + 3];
157 char device_name[ACPI_SBS_BLOCK_MAX + 3];
158 char device_chemistry[ACPI_SBS_BLOCK_MAX + 3];
159 };
160
161 struct acpi_battery_state {
162 s16 voltage;
163 s16 amperage;
164 s16 remaining_capacity;
165 s16 battery_state;
166 };
167
168 struct acpi_battery_alarm {
169 s16 remaining_capacity;
170 };
171
172 struct acpi_battery {
173 int alive;
174 int id;
175 int init_state;
176 int battery_present;
177 struct acpi_sbs *sbs;
178 struct acpi_battery_info info;
179 struct acpi_battery_state state;
180 struct acpi_battery_alarm alarm;
181 struct proc_dir_entry *battery_entry;
182 };
183
184 struct acpi_sbs {
185 int base;
186 struct acpi_device *device;
187 struct mutex mutex;
188 int sbsm_present;
189 int sbsm_batteries_supported;
190 struct proc_dir_entry *ac_entry;
191 struct acpi_ac ac;
192 struct acpi_battery battery[MAX_SBS_BAT];
193 int zombie;
194 struct timer_list update_timer;
195 int run_cnt;
196 int update_proc_flg;
197 };
198
199 static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type);
200 static void acpi_sbs_update_time(void *data);
201
202 union sbs_rw_data {
203 u16 word;
204 u8 block[ACPI_SBS_BLOCK_MAX + 2];
205 };
206
207 static int acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr,
208 char read_write, u8 command, int size,
209 union sbs_rw_data *data);
210
211 /* --------------------------------------------------------------------------
212 SMBus Communication
213 -------------------------------------------------------------------------- */
214
215 static int acpi_ec_sbs_read(struct acpi_sbs *sbs, u8 address, u8 * data)
216 {
217 u8 val;
218 int err;
219
220 err = ec_read(sbs->base + address, &val);
221 if (!err) {
222 *data = val;
223 }
224 xmsleep(ACPI_EC_SMB_TRANSACTION_SLEEP);
225 return (err);
226 }
227
228 static int acpi_ec_sbs_write(struct acpi_sbs *sbs, u8 address, u8 data)
229 {
230 int err;
231
232 err = ec_write(sbs->base + address, data);
233 return (err);
234 }
235
236 static int
237 acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr,
238 char read_write, u8 command, int size,
239 union sbs_rw_data *data)
240 {
241 unsigned char protocol, len = 0, temp[2] = { 0, 0 };
242 int i;
243
244 if (read_write == ACPI_SBS_SMBUS_READ) {
245 protocol = ACPI_EC_SMB_PRTCL_READ;
246 } else {
247 protocol = ACPI_EC_SMB_PRTCL_WRITE;
248 }
249
250 switch (size) {
251
252 case ACPI_SBS_WORD_DATA:
253 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command);
254 if (read_write == ACPI_SBS_SMBUS_WRITE) {
255 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA, data->word);
256 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + 1,
257 data->word >> 8);
258 }
259 protocol |= ACPI_EC_SMB_PRTCL_WORD_DATA;
260 break;
261 case ACPI_SBS_BLOCK_DATA:
262 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command);
263 if (read_write == ACPI_SBS_SMBUS_WRITE) {
264 len = min_t(u8, data->block[0], 32);
265 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_BCNT, len);
266 for (i = 0; i < len; i++)
267 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + i,
268 data->block[i + 1]);
269 }
270 protocol |= ACPI_EC_SMB_PRTCL_BLOCK_DATA;
271 break;
272 default:
273 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
274 "unsupported transaction %d", size));
275 return (-1);
276 }
277
278 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_ADDR, addr << 1);
279 acpi_ec_sbs_write(sbs, ACPI_EC_SMB_PRTCL, protocol);
280
281 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
282
283 if (~temp[0] & ACPI_EC_SMB_STS_DONE) {
284 xmsleep(ACPI_EC_SMB_ACCESS_SLEEP1);
285 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
286 }
287 if (~temp[0] & ACPI_EC_SMB_STS_DONE) {
288 xmsleep(ACPI_EC_SMB_ACCESS_SLEEP2);
289 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
290 }
291 if ((~temp[0] & ACPI_EC_SMB_STS_DONE)
292 || (temp[0] & ACPI_EC_SMB_STS_STATUS)) {
293 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
294 "transaction %d error", size));
295 return (-1);
296 }
297
298 if (read_write == ACPI_SBS_SMBUS_WRITE) {
299 return (0);
300 }
301
302 switch (size) {
303
304 case ACPI_SBS_WORD_DATA:
305 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA, temp);
306 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + 1, temp + 1);
307 data->word = (temp[1] << 8) | temp[0];
308 break;
309
310 case ACPI_SBS_BLOCK_DATA:
311 len = 0;
312 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_BCNT, &len);
313 len = min_t(u8, len, 32);
314 for (i = 0; i < len; i++)
315 acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + i,
316 data->block + i + 1);
317 data->block[0] = len;
318 break;
319 default:
320 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
321 "unsupported transaction %d", size));
322 return (-1);
323 }
324
325 return (0);
326 }
327
328 static int
329 acpi_sbs_read_word(struct acpi_sbs *sbs, int addr, int func, u16 * word)
330 {
331 union sbs_rw_data data;
332 int result = 0;
333
334 result = acpi_ec_sbs_access(sbs, addr,
335 ACPI_SBS_SMBUS_READ, func,
336 ACPI_SBS_WORD_DATA, &data);
337 if (result) {
338 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
339 "acpi_ec_sbs_access() failed"));
340 } else {
341 *word = data.word;
342 }
343
344 return result;
345 }
346
347 static int
348 acpi_sbs_read_str(struct acpi_sbs *sbs, int addr, int func, char *str)
349 {
350 union sbs_rw_data data;
351 int result = 0;
352
353 result = acpi_ec_sbs_access(sbs, addr,
354 ACPI_SBS_SMBUS_READ, func,
355 ACPI_SBS_BLOCK_DATA, &data);
356 if (result) {
357 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
358 "acpi_ec_sbs_access() failed"));
359 } else {
360 strncpy(str, (const char *)data.block + 1, data.block[0]);
361 str[data.block[0]] = 0;
362 }
363
364 return result;
365 }
366
367 static int
368 acpi_sbs_write_word(struct acpi_sbs *sbs, int addr, int func, int word)
369 {
370 union sbs_rw_data data;
371 int result = 0;
372
373 data.word = word;
374
375 result = acpi_ec_sbs_access(sbs, addr,
376 ACPI_SBS_SMBUS_WRITE, func,
377 ACPI_SBS_WORD_DATA, &data);
378 if (result) {
379 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
380 "acpi_ec_sbs_access() failed"));
381 }
382
383 return result;
384 }
385
386 static int sbs_zombie(struct acpi_sbs *sbs)
387 {
388 return (sbs->zombie);
389 }
390
391 static int sbs_mutex_lock(struct acpi_sbs *sbs)
392 {
393 if (sbs_zombie(sbs)) {
394 return -ENODEV;
395 }
396 mutex_lock(&sbs->mutex);
397 return 0;
398 }
399
400 static void sbs_mutex_unlock(struct acpi_sbs *sbs)
401 {
402 mutex_unlock(&sbs->mutex);
403 }
404
405 /* --------------------------------------------------------------------------
406 Smart Battery System Management
407 -------------------------------------------------------------------------- */
408
409 static int acpi_check_update_proc(struct acpi_sbs *sbs)
410 {
411 acpi_status status = AE_OK;
412
413 if (update_time == 0) {
414 sbs->update_proc_flg = 0;
415 return 0;
416 }
417 if (sbs->update_proc_flg == 0) {
418 status = acpi_os_execute(OSL_GPE_HANDLER,
419 acpi_sbs_update_time, sbs);
420 if (status != AE_OK) {
421 ACPI_EXCEPTION((AE_INFO, status,
422 "acpi_os_execute() failed"));
423 return 1;
424 }
425 sbs->update_proc_flg = 1;
426 }
427 return 0;
428 }
429
430 static int acpi_sbs_generate_event(struct acpi_device *device,
431 int event, int state, char *bid, char *class)
432 {
433 char bid_saved[5];
434 char class_saved[20];
435 int result = 0;
436
437 strcpy(bid_saved, acpi_device_bid(device));
438 strcpy(class_saved, acpi_device_class(device));
439
440 strcpy(acpi_device_bid(device), bid);
441 strcpy(acpi_device_class(device), class);
442
443 result = acpi_bus_generate_proc_event(device, event, state);
444
445 strcpy(acpi_device_bid(device), bid_saved);
446 strcpy(acpi_device_class(device), class_saved);
447
448 acpi_bus_generate_netlink_event(class, bid, event, state);
449 return result;
450 }
451
452 static int acpi_battery_get_present(struct acpi_battery *battery)
453 {
454 s16 state;
455 int result = 0;
456 int is_present = 0;
457
458 result = acpi_sbs_read_word(battery->sbs,
459 ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
460 if (result) {
461 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
462 "acpi_sbs_read_word() failed"));
463 }
464 if (!result) {
465 is_present = (state & 0x000f) & (1 << battery->id);
466 }
467 battery->battery_present = is_present;
468
469 return result;
470 }
471
472 static int acpi_battery_select(struct acpi_battery *battery)
473 {
474 struct acpi_sbs *sbs = battery->sbs;
475 int result = 0;
476 s16 state;
477 int foo;
478
479 if (sbs->sbsm_present) {
480
481 /* Take special care not to knobble other nibbles of
482 * state (aka selector_state), since
483 * it causes charging to halt on SBSELs */
484
485 result =
486 acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
487 if (result) {
488 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
489 "acpi_sbs_read_word() failed"));
490 goto end;
491 }
492
493 foo = (state & 0x0fff) | (1 << (battery->id + 12));
494 result =
495 acpi_sbs_write_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, foo);
496 if (result) {
497 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
498 "acpi_sbs_write_word() failed"));
499 goto end;
500 }
501 }
502
503 end:
504 return result;
505 }
506
507 static int acpi_sbsm_get_info(struct acpi_sbs *sbs)
508 {
509 int result = 0;
510 s16 battery_system_info;
511
512 result = acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x04,
513 &battery_system_info);
514 if (result) {
515 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
516 "acpi_sbs_read_word() failed"));
517 goto end;
518 }
519 sbs->sbsm_present = 1;
520 sbs->sbsm_batteries_supported = battery_system_info & 0x000f;
521
522 end:
523
524 return result;
525 }
526
527 static int acpi_battery_get_info(struct acpi_battery *battery)
528 {
529 struct acpi_sbs *sbs = battery->sbs;
530 int result = 0;
531 s16 battery_mode;
532 s16 specification_info;
533
534 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
535 &battery_mode);
536 if (result) {
537 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
538 "acpi_sbs_read_word() failed"));
539 goto end;
540 }
541 battery->info.capacity_mode = (battery_mode & 0x8000) >> 15;
542
543 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x10,
544 &battery->info.full_charge_capacity);
545 if (result) {
546 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
547 "acpi_sbs_read_word() failed"));
548 goto end;
549 }
550
551 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x18,
552 &battery->info.design_capacity);
553
554 if (result) {
555 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
556 "acpi_sbs_read_word() failed"));
557 goto end;
558 }
559
560 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x19,
561 &battery->info.design_voltage);
562 if (result) {
563 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
564 "acpi_sbs_read_word() failed"));
565 goto end;
566 }
567
568 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1a,
569 &specification_info);
570 if (result) {
571 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
572 "acpi_sbs_read_word() failed"));
573 goto end;
574 }
575
576 switch ((specification_info & 0x0f00) >> 8) {
577 case 1:
578 battery->info.vscale = 10;
579 break;
580 case 2:
581 battery->info.vscale = 100;
582 break;
583 case 3:
584 battery->info.vscale = 1000;
585 break;
586 default:
587 battery->info.vscale = 1;
588 }
589
590 switch ((specification_info & 0xf000) >> 12) {
591 case 1:
592 battery->info.ipscale = 10;
593 break;
594 case 2:
595 battery->info.ipscale = 100;
596 break;
597 case 3:
598 battery->info.ipscale = 1000;
599 break;
600 default:
601 battery->info.ipscale = 1;
602 }
603
604 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1c,
605 &battery->info.serial_number);
606 if (result) {
607 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
608 "acpi_sbs_read_word() failed"));
609 goto end;
610 }
611
612 result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x20,
613 battery->info.manufacturer_name);
614 if (result) {
615 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
616 "acpi_sbs_read_str() failed"));
617 goto end;
618 }
619
620 result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x21,
621 battery->info.device_name);
622 if (result) {
623 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
624 "acpi_sbs_read_str() failed"));
625 goto end;
626 }
627
628 result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x22,
629 battery->info.device_chemistry);
630 if (result) {
631 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
632 "acpi_sbs_read_str() failed"));
633 goto end;
634 }
635
636 end:
637 return result;
638 }
639
640 static int acpi_battery_get_state(struct acpi_battery *battery)
641 {
642 struct acpi_sbs *sbs = battery->sbs;
643 int result = 0;
644
645 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x09,
646 &battery->state.voltage);
647 if (result) {
648 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
649 "acpi_sbs_read_word() failed"));
650 goto end;
651 }
652
653 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0a,
654 &battery->state.amperage);
655 if (result) {
656 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
657 "acpi_sbs_read_word() failed"));
658 goto end;
659 }
660
661 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0f,
662 &battery->state.remaining_capacity);
663 if (result) {
664 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
665 "acpi_sbs_read_word() failed"));
666 goto end;
667 }
668
669 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x16,
670 &battery->state.battery_state);
671 if (result) {
672 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
673 "acpi_sbs_read_word() failed"));
674 goto end;
675 }
676
677 end:
678 return result;
679 }
680
681 static int acpi_battery_get_alarm(struct acpi_battery *battery)
682 {
683 struct acpi_sbs *sbs = battery->sbs;
684 int result = 0;
685
686 result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
687 &battery->alarm.remaining_capacity);
688 if (result) {
689 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
690 "acpi_sbs_read_word() failed"));
691 goto end;
692 }
693
694 end:
695
696 return result;
697 }
698
699 static int acpi_battery_set_alarm(struct acpi_battery *battery,
700 unsigned long alarm)
701 {
702 struct acpi_sbs *sbs = battery->sbs;
703 int result = 0;
704 s16 battery_mode;
705 int foo;
706
707 result = acpi_battery_select(battery);
708 if (result) {
709 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
710 "acpi_battery_select() failed"));
711 goto end;
712 }
713
714 /* If necessary, enable the alarm */
715
716 if (alarm > 0) {
717 result =
718 acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
719 &battery_mode);
720 if (result) {
721 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
722 "acpi_sbs_read_word() failed"));
723 goto end;
724 }
725
726 result =
727 acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
728 battery_mode & 0xbfff);
729 if (result) {
730 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
731 "acpi_sbs_write_word() failed"));
732 goto end;
733 }
734 }
735
736 foo = alarm / (battery->info.capacity_mode ? 10 : 1);
737 result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, foo);
738 if (result) {
739 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
740 "acpi_sbs_write_word() failed"));
741 goto end;
742 }
743
744 end:
745
746 return result;
747 }
748
749 static int acpi_battery_set_mode(struct acpi_battery *battery)
750 {
751 struct acpi_sbs *sbs = battery->sbs;
752 int result = 0;
753 s16 battery_mode;
754
755 if (capacity_mode == DEF_CAPACITY_UNIT) {
756 goto end;
757 }
758
759 result = acpi_sbs_read_word(sbs,
760 ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
761 if (result) {
762 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
763 "acpi_sbs_read_word() failed"));
764 goto end;
765 }
766
767 if (capacity_mode == MAH_CAPACITY_UNIT) {
768 battery_mode &= 0x7fff;
769 } else {
770 battery_mode |= 0x8000;
771 }
772 result = acpi_sbs_write_word(sbs,
773 ACPI_SB_SMBUS_ADDR, 0x03, battery_mode);
774 if (result) {
775 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
776 "acpi_sbs_write_word() failed"));
777 goto end;
778 }
779
780 result = acpi_sbs_read_word(sbs,
781 ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
782 if (result) {
783 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
784 "acpi_sbs_read_word() failed"));
785 goto end;
786 }
787
788 end:
789 return result;
790 }
791
792 static int acpi_battery_init(struct acpi_battery *battery)
793 {
794 int result = 0;
795
796 result = acpi_battery_select(battery);
797 if (result) {
798 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
799 "acpi_battery_select() failed"));
800 goto end;
801 }
802
803 result = acpi_battery_set_mode(battery);
804 if (result) {
805 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
806 "acpi_battery_set_mode() failed"));
807 goto end;
808 }
809
810 result = acpi_battery_get_info(battery);
811 if (result) {
812 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
813 "acpi_battery_get_info() failed"));
814 goto end;
815 }
816
817 result = acpi_battery_get_state(battery);
818 if (result) {
819 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
820 "acpi_battery_get_state() failed"));
821 goto end;
822 }
823
824 result = acpi_battery_get_alarm(battery);
825 if (result) {
826 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
827 "acpi_battery_get_alarm() failed"));
828 goto end;
829 }
830
831 end:
832 return result;
833 }
834
835 static int acpi_ac_get_present(struct acpi_sbs *sbs)
836 {
837 int result = 0;
838 s16 charger_status;
839
840 result = acpi_sbs_read_word(sbs, ACPI_SBC_SMBUS_ADDR, 0x13,
841 &charger_status);
842
843 if (result) {
844 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
845 "acpi_sbs_read_word() failed"));
846 goto end;
847 }
848
849 sbs->ac.ac_present = (charger_status & 0x8000) >> 15;
850
851 end:
852
853 return result;
854 }
855
856 /* --------------------------------------------------------------------------
857 FS Interface (/proc/acpi)
858 -------------------------------------------------------------------------- */
859
860 /* Generic Routines */
861
862 static int
863 acpi_sbs_generic_add_fs(struct proc_dir_entry **dir,
864 struct proc_dir_entry *parent_dir,
865 char *dir_name,
866 struct file_operations *info_fops,
867 struct file_operations *state_fops,
868 struct file_operations *alarm_fops, void *data)
869 {
870 struct proc_dir_entry *entry = NULL;
871
872 if (!*dir) {
873 *dir = proc_mkdir(dir_name, parent_dir);
874 if (!*dir) {
875 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
876 "proc_mkdir() failed"));
877 return -ENODEV;
878 }
879 (*dir)->owner = THIS_MODULE;
880 }
881
882 /* 'info' [R] */
883 if (info_fops) {
884 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
885 if (!entry) {
886 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
887 "create_proc_entry() failed"));
888 } else {
889 entry->proc_fops = info_fops;
890 entry->data = data;
891 entry->owner = THIS_MODULE;
892 }
893 }
894
895 /* 'state' [R] */
896 if (state_fops) {
897 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
898 if (!entry) {
899 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
900 "create_proc_entry() failed"));
901 } else {
902 entry->proc_fops = state_fops;
903 entry->data = data;
904 entry->owner = THIS_MODULE;
905 }
906 }
907
908 /* 'alarm' [R/W] */
909 if (alarm_fops) {
910 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
911 if (!entry) {
912 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
913 "create_proc_entry() failed"));
914 } else {
915 entry->proc_fops = alarm_fops;
916 entry->data = data;
917 entry->owner = THIS_MODULE;
918 }
919 }
920
921 return 0;
922 }
923
924 static void
925 acpi_sbs_generic_remove_fs(struct proc_dir_entry **dir,
926 struct proc_dir_entry *parent_dir)
927 {
928
929 if (*dir) {
930 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
931 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
932 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
933 remove_proc_entry((*dir)->name, parent_dir);
934 *dir = NULL;
935 }
936
937 }
938
939 /* Smart Battery Interface */
940
941 static struct proc_dir_entry *acpi_battery_dir = NULL;
942
943 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
944 {
945 struct acpi_battery *battery = seq->private;
946 struct acpi_sbs *sbs = battery->sbs;
947 int cscale;
948 int result = 0;
949
950 if (sbs_mutex_lock(sbs)) {
951 return -ENODEV;
952 }
953
954 result = acpi_check_update_proc(sbs);
955 if (result)
956 goto end;
957
958 if (update_time == 0) {
959 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_INFO);
960 if (result) {
961 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
962 "acpi_sbs_update_run() failed"));
963 }
964 }
965
966 if (battery->battery_present) {
967 seq_printf(seq, "present: yes\n");
968 } else {
969 seq_printf(seq, "present: no\n");
970 goto end;
971 }
972
973 if (battery->info.capacity_mode) {
974 cscale = battery->info.vscale * battery->info.ipscale;
975 } else {
976 cscale = battery->info.ipscale;
977 }
978 seq_printf(seq, "design capacity: %i%s\n",
979 battery->info.design_capacity * cscale,
980 battery->info.capacity_mode ? "0 mWh" : " mAh");
981
982 seq_printf(seq, "last full capacity: %i%s\n",
983 battery->info.full_charge_capacity * cscale,
984 battery->info.capacity_mode ? "0 mWh" : " mAh");
985
986 seq_printf(seq, "battery technology: rechargeable\n");
987
988 seq_printf(seq, "design voltage: %i mV\n",
989 battery->info.design_voltage * battery->info.vscale);
990
991 seq_printf(seq, "design capacity warning: unknown\n");
992 seq_printf(seq, "design capacity low: unknown\n");
993 seq_printf(seq, "capacity granularity 1: unknown\n");
994 seq_printf(seq, "capacity granularity 2: unknown\n");
995
996 seq_printf(seq, "model number: %s\n",
997 battery->info.device_name);
998
999 seq_printf(seq, "serial number: %i\n",
1000 battery->info.serial_number);
1001
1002 seq_printf(seq, "battery type: %s\n",
1003 battery->info.device_chemistry);
1004
1005 seq_printf(seq, "OEM info: %s\n",
1006 battery->info.manufacturer_name);
1007
1008 end:
1009
1010 sbs_mutex_unlock(sbs);
1011
1012 return result;
1013 }
1014
1015 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
1016 {
1017 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
1018 }
1019
1020 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
1021 {
1022 struct acpi_battery *battery = seq->private;
1023 struct acpi_sbs *sbs = battery->sbs;
1024 int result = 0;
1025 int cscale;
1026 int foo;
1027
1028 if (sbs_mutex_lock(sbs)) {
1029 return -ENODEV;
1030 }
1031
1032 result = acpi_check_update_proc(sbs);
1033 if (result)
1034 goto end;
1035
1036 if (update_time == 0) {
1037 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_STATE);
1038 if (result) {
1039 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1040 "acpi_sbs_update_run() failed"));
1041 }
1042 }
1043
1044 if (battery->battery_present) {
1045 seq_printf(seq, "present: yes\n");
1046 } else {
1047 seq_printf(seq, "present: no\n");
1048 goto end;
1049 }
1050
1051 if (battery->info.capacity_mode) {
1052 cscale = battery->info.vscale * battery->info.ipscale;
1053 } else {
1054 cscale = battery->info.ipscale;
1055 }
1056
1057 if (battery->state.battery_state & 0x0010) {
1058 seq_printf(seq, "capacity state: critical\n");
1059 } else {
1060 seq_printf(seq, "capacity state: ok\n");
1061 }
1062
1063 foo = (s16) battery->state.amperage * battery->info.ipscale;
1064 if (battery->info.capacity_mode) {
1065 foo = foo * battery->info.design_voltage / 1000;
1066 }
1067 if (battery->state.amperage < 0) {
1068 seq_printf(seq, "charging state: discharging\n");
1069 seq_printf(seq, "present rate: %d %s\n",
1070 -foo, battery->info.capacity_mode ? "mW" : "mA");
1071 } else if (battery->state.amperage > 0) {
1072 seq_printf(seq, "charging state: charging\n");
1073 seq_printf(seq, "present rate: %d %s\n",
1074 foo, battery->info.capacity_mode ? "mW" : "mA");
1075 } else {
1076 seq_printf(seq, "charging state: charged\n");
1077 seq_printf(seq, "present rate: 0 %s\n",
1078 battery->info.capacity_mode ? "mW" : "mA");
1079 }
1080
1081 seq_printf(seq, "remaining capacity: %i%s\n",
1082 battery->state.remaining_capacity * cscale,
1083 battery->info.capacity_mode ? "0 mWh" : " mAh");
1084
1085 seq_printf(seq, "present voltage: %i mV\n",
1086 battery->state.voltage * battery->info.vscale);
1087
1088 end:
1089
1090 sbs_mutex_unlock(sbs);
1091
1092 return result;
1093 }
1094
1095 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
1096 {
1097 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
1098 }
1099
1100 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
1101 {
1102 struct acpi_battery *battery = seq->private;
1103 struct acpi_sbs *sbs = battery->sbs;
1104 int result = 0;
1105 int cscale;
1106
1107 if (sbs_mutex_lock(sbs)) {
1108 return -ENODEV;
1109 }
1110
1111 result = acpi_check_update_proc(sbs);
1112 if (result)
1113 goto end;
1114
1115 if (update_time == 0) {
1116 result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_ALARM);
1117 if (result) {
1118 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1119 "acpi_sbs_update_run() failed"));
1120 }
1121 }
1122
1123 if (!battery->battery_present) {
1124 seq_printf(seq, "present: no\n");
1125 goto end;
1126 }
1127
1128 if (battery->info.capacity_mode) {
1129 cscale = battery->info.vscale * battery->info.ipscale;
1130 } else {
1131 cscale = battery->info.ipscale;
1132 }
1133
1134 seq_printf(seq, "alarm: ");
1135 if (battery->alarm.remaining_capacity) {
1136 seq_printf(seq, "%i%s\n",
1137 battery->alarm.remaining_capacity * cscale,
1138 battery->info.capacity_mode ? "0 mWh" : " mAh");
1139 } else {
1140 seq_printf(seq, "disabled\n");
1141 }
1142
1143 end:
1144
1145 sbs_mutex_unlock(sbs);
1146
1147 return result;
1148 }
1149
1150 static ssize_t
1151 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
1152 size_t count, loff_t * ppos)
1153 {
1154 struct seq_file *seq = file->private_data;
1155 struct acpi_battery *battery = seq->private;
1156 struct acpi_sbs *sbs = battery->sbs;
1157 char alarm_string[12] = { '\0' };
1158 int result, old_alarm, new_alarm;
1159
1160 if (sbs_mutex_lock(sbs)) {
1161 return -ENODEV;
1162 }
1163
1164 result = acpi_check_update_proc(sbs);
1165 if (result)
1166 goto end;
1167
1168 if (!battery->battery_present) {
1169 result = -ENODEV;
1170 goto end;
1171 }
1172
1173 if (count > sizeof(alarm_string) - 1) {
1174 result = -EINVAL;
1175 goto end;
1176 }
1177
1178 if (copy_from_user(alarm_string, buffer, count)) {
1179 result = -EFAULT;
1180 goto end;
1181 }
1182
1183 alarm_string[count] = 0;
1184
1185 old_alarm = battery->alarm.remaining_capacity;
1186 new_alarm = simple_strtoul(alarm_string, NULL, 0);
1187
1188 result = acpi_battery_set_alarm(battery, new_alarm);
1189 if (result) {
1190 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1191 "acpi_battery_set_alarm() failed"));
1192 acpi_battery_set_alarm(battery, old_alarm);
1193 goto end;
1194 }
1195 result = acpi_battery_get_alarm(battery);
1196 if (result) {
1197 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1198 "acpi_battery_get_alarm() failed"));
1199 acpi_battery_set_alarm(battery, old_alarm);
1200 goto end;
1201 }
1202
1203 end:
1204 sbs_mutex_unlock(sbs);
1205
1206 if (result) {
1207 return result;
1208 } else {
1209 return count;
1210 }
1211 }
1212
1213 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
1214 {
1215 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
1216 }
1217
1218 static struct file_operations acpi_battery_info_fops = {
1219 .open = acpi_battery_info_open_fs,
1220 .read = seq_read,
1221 .llseek = seq_lseek,
1222 .release = single_release,
1223 .owner = THIS_MODULE,
1224 };
1225
1226 static struct file_operations acpi_battery_state_fops = {
1227 .open = acpi_battery_state_open_fs,
1228 .read = seq_read,
1229 .llseek = seq_lseek,
1230 .release = single_release,
1231 .owner = THIS_MODULE,
1232 };
1233
1234 static struct file_operations acpi_battery_alarm_fops = {
1235 .open = acpi_battery_alarm_open_fs,
1236 .read = seq_read,
1237 .write = acpi_battery_write_alarm,
1238 .llseek = seq_lseek,
1239 .release = single_release,
1240 .owner = THIS_MODULE,
1241 };
1242
1243 /* Legacy AC Adapter Interface */
1244
1245 static struct proc_dir_entry *acpi_ac_dir = NULL;
1246
1247 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
1248 {
1249 struct acpi_sbs *sbs = seq->private;
1250 int result;
1251
1252 if (sbs_mutex_lock(sbs)) {
1253 return -ENODEV;
1254 }
1255
1256 if (update_time == 0) {
1257 result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_AC_STATE);
1258 if (result) {
1259 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1260 "acpi_sbs_update_run() failed"));
1261 }
1262 }
1263
1264 seq_printf(seq, "state: %s\n",
1265 sbs->ac.ac_present ? "on-line" : "off-line");
1266
1267 sbs_mutex_unlock(sbs);
1268
1269 return 0;
1270 }
1271
1272 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
1273 {
1274 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
1275 }
1276
1277 static struct file_operations acpi_ac_state_fops = {
1278 .open = acpi_ac_state_open_fs,
1279 .read = seq_read,
1280 .llseek = seq_lseek,
1281 .release = single_release,
1282 .owner = THIS_MODULE,
1283 };
1284
1285 /* --------------------------------------------------------------------------
1286 Driver Interface
1287 -------------------------------------------------------------------------- */
1288
1289 /* Smart Battery */
1290
1291 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
1292 {
1293 int is_present;
1294 int result;
1295 char dir_name[32];
1296 struct acpi_battery *battery;
1297
1298 battery = &sbs->battery[id];
1299
1300 battery->alive = 0;
1301
1302 battery->init_state = 0;
1303 battery->id = id;
1304 battery->sbs = sbs;
1305
1306 result = acpi_battery_select(battery);
1307 if (result) {
1308 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1309 "acpi_battery_select() failed"));
1310 goto end;
1311 }
1312
1313 result = acpi_battery_get_present(battery);
1314 if (result) {
1315 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1316 "acpi_battery_get_present() failed"));
1317 goto end;
1318 }
1319
1320 is_present = battery->battery_present;
1321
1322 if (is_present) {
1323 result = acpi_battery_init(battery);
1324 if (result) {
1325 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1326 "acpi_battery_init() failed"));
1327 goto end;
1328 }
1329 battery->init_state = 1;
1330 }
1331
1332 sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1333
1334 result = acpi_sbs_generic_add_fs(&battery->battery_entry,
1335 acpi_battery_dir,
1336 dir_name,
1337 &acpi_battery_info_fops,
1338 &acpi_battery_state_fops,
1339 &acpi_battery_alarm_fops, battery);
1340 if (result) {
1341 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1342 "acpi_sbs_generic_add_fs() failed"));
1343 goto end;
1344 }
1345 battery->alive = 1;
1346
1347 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
1348 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), dir_name,
1349 sbs->battery->battery_present ? "present" : "absent");
1350
1351 end:
1352 return result;
1353 }
1354
1355 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
1356 {
1357
1358 if (sbs->battery[id].battery_entry) {
1359 acpi_sbs_generic_remove_fs(&(sbs->battery[id].battery_entry),
1360 acpi_battery_dir);
1361 }
1362 }
1363
1364 static int acpi_ac_add(struct acpi_sbs *sbs)
1365 {
1366 int result;
1367
1368 result = acpi_ac_get_present(sbs);
1369 if (result) {
1370 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1371 "acpi_ac_get_present() failed"));
1372 goto end;
1373 }
1374
1375 result = acpi_sbs_generic_add_fs(&sbs->ac_entry,
1376 acpi_ac_dir,
1377 ACPI_AC_DIR_NAME,
1378 NULL, &acpi_ac_state_fops, NULL, sbs);
1379 if (result) {
1380 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1381 "acpi_sbs_generic_add_fs() failed"));
1382 goto end;
1383 }
1384
1385 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
1386 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
1387 ACPI_AC_DIR_NAME, sbs->ac.ac_present ? "on-line" : "off-line");
1388
1389 end:
1390
1391 return result;
1392 }
1393
1394 static void acpi_ac_remove(struct acpi_sbs *sbs)
1395 {
1396
1397 if (sbs->ac_entry) {
1398 acpi_sbs_generic_remove_fs(&sbs->ac_entry, acpi_ac_dir);
1399 }
1400 }
1401
1402 static void acpi_sbs_update_time_run(unsigned long data)
1403 {
1404 acpi_os_execute(OSL_GPE_HANDLER, acpi_sbs_update_time, (void *)data);
1405 }
1406
1407 static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type)
1408 {
1409 struct acpi_battery *battery;
1410 int result = 0, cnt;
1411 int old_ac_present = -1;
1412 int old_battery_present = -1;
1413 int new_ac_present = -1;
1414 int new_battery_present = -1;
1415 int id_min = 0, id_max = MAX_SBS_BAT - 1;
1416 char dir_name[32];
1417 int do_battery_init = 0, do_ac_init = 0;
1418 int old_remaining_capacity = 0;
1419 int update_battery = 1;
1420 int up_tm = update_time;
1421
1422 if (sbs_zombie(sbs)) {
1423 goto end;
1424 }
1425
1426 if (id >= 0) {
1427 id_min = id_max = id;
1428 }
1429
1430 if (data_type == DATA_TYPE_COMMON && up_tm > 0) {
1431 cnt = up_tm / (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
1432 if (sbs->run_cnt % cnt != 0) {
1433 update_battery = 0;
1434 }
1435 }
1436
1437 sbs->run_cnt++;
1438
1439 old_ac_present = sbs->ac.ac_present;
1440
1441 result = acpi_ac_get_present(sbs);
1442 if (result) {
1443 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1444 "acpi_ac_get_present() failed"));
1445 }
1446
1447 new_ac_present = sbs->ac.ac_present;
1448
1449 do_ac_init = (old_ac_present != new_ac_present);
1450 if (sbs->run_cnt == 1 && data_type == DATA_TYPE_COMMON) {
1451 do_ac_init = 1;
1452 }
1453
1454 if (do_ac_init) {
1455 result = acpi_sbs_generate_event(sbs->device,
1456 ACPI_SBS_AC_NOTIFY_STATUS,
1457 new_ac_present,
1458 ACPI_AC_DIR_NAME,
1459 ACPI_AC_CLASS);
1460 if (result) {
1461 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1462 "acpi_sbs_generate_event() failed"));
1463 }
1464 }
1465
1466 if (data_type == DATA_TYPE_COMMON) {
1467 if (!do_ac_init && !update_battery) {
1468 goto end;
1469 }
1470 }
1471
1472 if (data_type == DATA_TYPE_AC_STATE && !do_ac_init) {
1473 goto end;
1474 }
1475
1476 for (id = id_min; id <= id_max; id++) {
1477 battery = &sbs->battery[id];
1478 if (battery->alive == 0) {
1479 continue;
1480 }
1481
1482 old_remaining_capacity = battery->state.remaining_capacity;
1483
1484 old_battery_present = battery->battery_present;
1485
1486 result = acpi_battery_select(battery);
1487 if (result) {
1488 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1489 "acpi_battery_select() failed"));
1490 }
1491
1492 result = acpi_battery_get_present(battery);
1493 if (result) {
1494 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1495 "acpi_battery_get_present() failed"));
1496 }
1497
1498 new_battery_present = battery->battery_present;
1499
1500 do_battery_init = ((old_battery_present != new_battery_present)
1501 && new_battery_present);
1502 if (!new_battery_present)
1503 goto event;
1504 if (do_ac_init || do_battery_init) {
1505 result = acpi_battery_init(battery);
1506 if (result) {
1507 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1508 "acpi_battery_init() "
1509 "failed"));
1510 }
1511 }
1512 if (sbs_zombie(sbs)) {
1513 goto end;
1514 }
1515
1516 if ((data_type == DATA_TYPE_COMMON
1517 || data_type == DATA_TYPE_INFO)
1518 && new_battery_present) {
1519 result = acpi_battery_get_info(battery);
1520 if (result) {
1521 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1522 "acpi_battery_get_info() failed"));
1523 }
1524 }
1525 if (data_type == DATA_TYPE_INFO) {
1526 continue;
1527 }
1528 if (sbs_zombie(sbs)) {
1529 goto end;
1530 }
1531
1532 if ((data_type == DATA_TYPE_COMMON
1533 || data_type == DATA_TYPE_STATE)
1534 && new_battery_present) {
1535 result = acpi_battery_get_state(battery);
1536 if (result) {
1537 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1538 "acpi_battery_get_state() failed"));
1539 }
1540 }
1541 if (data_type == DATA_TYPE_STATE) {
1542 goto event;
1543 }
1544 if (sbs_zombie(sbs)) {
1545 goto end;
1546 }
1547
1548 if ((data_type == DATA_TYPE_COMMON
1549 || data_type == DATA_TYPE_ALARM)
1550 && new_battery_present) {
1551 result = acpi_battery_get_alarm(battery);
1552 if (result) {
1553 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1554 "acpi_battery_get_alarm() "
1555 "failed"));
1556 }
1557 }
1558 if (data_type == DATA_TYPE_ALARM) {
1559 continue;
1560 }
1561 if (sbs_zombie(sbs)) {
1562 goto end;
1563 }
1564
1565 event:
1566
1567 if (old_battery_present != new_battery_present || do_ac_init ||
1568 old_remaining_capacity !=
1569 battery->state.remaining_capacity) {
1570 sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1571 result = acpi_sbs_generate_event(sbs->device,
1572 ACPI_SBS_BATTERY_NOTIFY_STATUS,
1573 new_battery_present,
1574 dir_name,
1575 ACPI_BATTERY_CLASS);
1576 if (result) {
1577 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1578 "acpi_sbs_generate_event() "
1579 "failed"));
1580 }
1581 }
1582 }
1583
1584 end:
1585
1586 return result;
1587 }
1588
1589 static void acpi_sbs_update_time(void *data)
1590 {
1591 struct acpi_sbs *sbs = data;
1592 unsigned long delay = -1;
1593 int result;
1594 unsigned int up_tm = update_time;
1595
1596 if (sbs_mutex_lock(sbs))
1597 return;
1598
1599 result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_COMMON);
1600 if (result) {
1601 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1602 "acpi_sbs_update_run() failed"));
1603 }
1604
1605 if (sbs_zombie(sbs)) {
1606 goto end;
1607 }
1608
1609 if (!up_tm) {
1610 if (timer_pending(&sbs->update_timer))
1611 del_timer(&sbs->update_timer);
1612 } else {
1613 delay = (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
1614 delay = jiffies + HZ * delay;
1615 if (timer_pending(&sbs->update_timer)) {
1616 mod_timer(&sbs->update_timer, delay);
1617 } else {
1618 sbs->update_timer.data = (unsigned long)data;
1619 sbs->update_timer.function = acpi_sbs_update_time_run;
1620 sbs->update_timer.expires = delay;
1621 add_timer(&sbs->update_timer);
1622 }
1623 }
1624
1625 end:
1626
1627 sbs_mutex_unlock(sbs);
1628 }
1629
1630 static int acpi_sbs_add(struct acpi_device *device)
1631 {
1632 struct acpi_sbs *sbs = NULL;
1633 int result = 0, remove_result = 0;
1634 int id;
1635 acpi_status status = AE_OK;
1636 unsigned long val;
1637
1638 status =
1639 acpi_evaluate_integer(device->handle, "_EC", NULL, &val);
1640 if (ACPI_FAILURE(status)) {
1641 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Error obtaining _EC"));
1642 return -EIO;
1643 }
1644
1645 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
1646 if (!sbs) {
1647 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "kzalloc() failed"));
1648 result = -ENOMEM;
1649 goto end;
1650 }
1651
1652 mutex_init(&sbs->mutex);
1653
1654 sbs_mutex_lock(sbs);
1655
1656 sbs->base = 0xff & (val >> 8);
1657 sbs->device = device;
1658
1659 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
1660 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
1661 acpi_driver_data(device) = sbs;
1662
1663 result = acpi_ac_add(sbs);
1664 if (result) {
1665 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_add() failed"));
1666 goto end;
1667 }
1668
1669 acpi_sbsm_get_info(sbs);
1670
1671 if (!sbs->sbsm_present) {
1672 result = acpi_battery_add(sbs, 0);
1673 if (result) {
1674 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1675 "acpi_battery_add() failed"));
1676 goto end;
1677 }
1678 } else {
1679 for (id = 0; id < MAX_SBS_BAT; id++) {
1680 if ((sbs->sbsm_batteries_supported & (1 << id))) {
1681 result = acpi_battery_add(sbs, id);
1682 if (result) {
1683 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1684 "acpi_battery_add() failed"));
1685 goto end;
1686 }
1687 }
1688 }
1689 }
1690
1691 init_timer(&sbs->update_timer);
1692 result = acpi_check_update_proc(sbs);
1693 if (result)
1694 goto end;
1695
1696 end:
1697
1698 sbs_mutex_unlock(sbs);
1699
1700 if (result) {
1701 remove_result = acpi_sbs_remove(device, 0);
1702 if (remove_result) {
1703 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1704 "acpi_sbs_remove() failed"));
1705 }
1706 }
1707
1708 return result;
1709 }
1710
1711 static int acpi_sbs_remove(struct acpi_device *device, int type)
1712 {
1713 struct acpi_sbs *sbs;
1714 int id;
1715
1716 if (!device) {
1717 return -EINVAL;
1718 }
1719
1720 sbs = acpi_driver_data(device);
1721 if (!sbs) {
1722 return -EINVAL;
1723 }
1724
1725 sbs_mutex_lock(sbs);
1726
1727 sbs->zombie = 1;
1728 del_timer_sync(&sbs->update_timer);
1729 acpi_os_wait_events_complete(NULL);
1730 del_timer_sync(&sbs->update_timer);
1731
1732 for (id = 0; id < MAX_SBS_BAT; id++) {
1733 acpi_battery_remove(sbs, id);
1734 }
1735
1736 acpi_ac_remove(sbs);
1737
1738 sbs_mutex_unlock(sbs);
1739
1740 mutex_destroy(&sbs->mutex);
1741
1742 kfree(sbs);
1743
1744 return 0;
1745 }
1746
1747 static void acpi_sbs_rmdirs(void)
1748 {
1749 if (acpi_ac_dir) {
1750 acpi_unlock_ac_dir(acpi_ac_dir);
1751 acpi_ac_dir = NULL;
1752 }
1753 if (acpi_battery_dir) {
1754 acpi_unlock_battery_dir(acpi_battery_dir);
1755 acpi_battery_dir = NULL;
1756 }
1757 }
1758
1759 static int acpi_sbs_resume(struct acpi_device *device)
1760 {
1761 struct acpi_sbs *sbs;
1762
1763 if (!device)
1764 return -EINVAL;
1765
1766 sbs = device->driver_data;
1767
1768 sbs->run_cnt = 0;
1769
1770 return 0;
1771 }
1772
1773 static int __init acpi_sbs_init(void)
1774 {
1775 int result = 0;
1776
1777 if (acpi_disabled)
1778 return -ENODEV;
1779
1780 if (capacity_mode != DEF_CAPACITY_UNIT
1781 && capacity_mode != MAH_CAPACITY_UNIT
1782 && capacity_mode != MWH_CAPACITY_UNIT) {
1783 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1784 "invalid capacity_mode = %d", capacity_mode));
1785 return -EINVAL;
1786 }
1787
1788 acpi_ac_dir = acpi_lock_ac_dir();
1789 if (!acpi_ac_dir) {
1790 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1791 "acpi_lock_ac_dir() failed"));
1792 return -ENODEV;
1793 }
1794
1795 acpi_battery_dir = acpi_lock_battery_dir();
1796 if (!acpi_battery_dir) {
1797 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1798 "acpi_lock_battery_dir() failed"));
1799 acpi_sbs_rmdirs();
1800 return -ENODEV;
1801 }
1802
1803 result = acpi_bus_register_driver(&acpi_sbs_driver);
1804 if (result < 0) {
1805 ACPI_EXCEPTION((AE_INFO, AE_ERROR,
1806 "acpi_bus_register_driver() failed"));
1807 acpi_sbs_rmdirs();
1808 return -ENODEV;
1809 }
1810
1811 return 0;
1812 }
1813
1814 static void __exit acpi_sbs_exit(void)
1815 {
1816 acpi_bus_unregister_driver(&acpi_sbs_driver);
1817
1818 acpi_sbs_rmdirs();
1819
1820 return;
1821 }
1822
1823 module_init(acpi_sbs_init);
1824 module_exit(acpi_sbs_exit);
linux kernel for loongson