ia64/linux-2.6.18-xen.hg

view drivers/acpi/sbs.c @ 897:329ea0ccb344

balloon: try harder to balloon up under memory pressure.

Currently if the balloon driver is unable to increase the guest's
reservation it assumes the failure was due to reaching its full
allocation, gives up on the ballooning operation and records the limit
it reached as the "hard limit". The driver will not try again until
the target is set again (even to the same value).

However it is possible that ballooning has in fact failed due to
memory pressure in the host and therefore it is desirable to keep
attempting to reach the target in case memory becomes available. The
most likely scenario is that some guests are ballooning down while
others are ballooning up and therefore there is temporary memory
pressure while things stabilise. You would not expect a well behaved
toolstack to ask a domain to balloon to more than its allocation nor
would you expect it to deliberately over-commit memory by setting
balloon targets which exceed the total host memory.

This patch drops the concept of a hard limit and causes the balloon
driver to retry increasing the reservation on a timer in the same
manner as when decreasing the reservation.

Also if we partially succeed in increasing the reservation
(i.e. receive less pages than we asked for) then we may as well keep
those pages rather than returning them to Xen.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Fri Jun 05 14:01:20 2009 +0100 (2009-06-05)
parents 831230e53067
children
line source
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 */
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/i2c.h>
34 #include <linux/delay.h>
36 #include "i2c_ec.h"
38 #define DEF_CAPACITY_UNIT 3
39 #define MAH_CAPACITY_UNIT 1
40 #define MWH_CAPACITY_UNIT 2
41 #define CAPACITY_UNIT DEF_CAPACITY_UNIT
43 #define REQUEST_UPDATE_MODE 1
44 #define QUEUE_UPDATE_MODE 2
46 #define DATA_TYPE_COMMON 0
47 #define DATA_TYPE_INFO 1
48 #define DATA_TYPE_STATE 2
49 #define DATA_TYPE_ALARM 3
50 #define DATA_TYPE_AC_STATE 4
52 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
53 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
54 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
55 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
57 #define ACPI_SBS_COMPONENT 0x00080000
58 #define ACPI_SBS_CLASS "sbs"
59 #define ACPI_AC_CLASS "ac_adapter"
60 #define ACPI_BATTERY_CLASS "battery"
61 #define ACPI_SBS_HID "ACPI0002"
62 #define ACPI_SBS_DRIVER_NAME "ACPI Smart Battery System Driver"
63 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
64 #define ACPI_SBS_FILE_INFO "info"
65 #define ACPI_SBS_FILE_STATE "state"
66 #define ACPI_SBS_FILE_ALARM "alarm"
67 #define ACPI_BATTERY_DIR_NAME "BAT%i"
68 #define ACPI_AC_DIR_NAME "AC0"
69 #define ACPI_SBC_SMBUS_ADDR 0x9
70 #define ACPI_SBSM_SMBUS_ADDR 0xa
71 #define ACPI_SB_SMBUS_ADDR 0xb
72 #define ACPI_SBS_AC_NOTIFY_STATUS 0x80
73 #define ACPI_SBS_BATTERY_NOTIFY_STATUS 0x80
74 #define ACPI_SBS_BATTERY_NOTIFY_INFO 0x81
76 #define _COMPONENT ACPI_SBS_COMPONENT
78 #define MAX_SBS_BAT 4
79 #define MAX_SMBUS_ERR 1
81 ACPI_MODULE_NAME("acpi_sbs");
83 MODULE_AUTHOR("Rich Townsend");
84 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
85 MODULE_LICENSE("GPL");
87 static struct semaphore sbs_sem;
89 #define UPDATE_MODE QUEUE_UPDATE_MODE
90 /* REQUEST_UPDATE_MODE QUEUE_UPDATE_MODE */
91 #define UPDATE_INFO_MODE 0
92 #define UPDATE_TIME 60
93 #define UPDATE_TIME2 0
95 static int capacity_mode = CAPACITY_UNIT;
96 static int update_mode = UPDATE_MODE;
97 static int update_info_mode = UPDATE_INFO_MODE;
98 static int update_time = UPDATE_TIME;
99 static int update_time2 = UPDATE_TIME2;
101 module_param(capacity_mode, int, CAPACITY_UNIT);
102 module_param(update_mode, int, UPDATE_MODE);
103 module_param(update_info_mode, int, UPDATE_INFO_MODE);
104 module_param(update_time, int, UPDATE_TIME);
105 module_param(update_time2, int, UPDATE_TIME2);
107 static int acpi_sbs_add(struct acpi_device *device);
108 static int acpi_sbs_remove(struct acpi_device *device, int type);
109 static void acpi_battery_smbus_err_handler(struct acpi_ec_smbus *smbus);
110 static void acpi_sbs_update_queue(void *data);
112 static struct acpi_driver acpi_sbs_driver = {
113 .name = ACPI_SBS_DRIVER_NAME,
114 .class = ACPI_SBS_CLASS,
115 .ids = ACPI_SBS_HID,
116 .ops = {
117 .add = acpi_sbs_add,
118 .remove = acpi_sbs_remove,
119 },
120 };
122 struct acpi_battery_info {
123 int capacity_mode;
124 s16 full_charge_capacity;
125 s16 design_capacity;
126 s16 design_voltage;
127 int vscale;
128 int ipscale;
129 s16 serial_number;
130 char manufacturer_name[I2C_SMBUS_BLOCK_MAX + 3];
131 char device_name[I2C_SMBUS_BLOCK_MAX + 3];
132 char device_chemistry[I2C_SMBUS_BLOCK_MAX + 3];
133 };
135 struct acpi_battery_state {
136 s16 voltage;
137 s16 amperage;
138 s16 remaining_capacity;
139 s16 average_time_to_empty;
140 s16 average_time_to_full;
141 s16 battery_status;
142 };
144 struct acpi_battery_alarm {
145 s16 remaining_capacity;
146 };
148 struct acpi_battery {
149 int alive;
150 int battery_present;
151 int id;
152 int init_state;
153 struct acpi_sbs *sbs;
154 struct acpi_battery_info info;
155 struct acpi_battery_state state;
156 struct acpi_battery_alarm alarm;
157 struct proc_dir_entry *battery_entry;
158 };
160 struct acpi_sbs {
161 acpi_handle handle;
162 struct acpi_device *device;
163 struct acpi_ec_smbus *smbus;
164 int sbsm_present;
165 int sbsm_batteries_supported;
166 int ac_present;
167 struct proc_dir_entry *ac_entry;
168 struct acpi_battery battery[MAX_SBS_BAT];
169 int update_info_mode;
170 int zombie;
171 int update_time;
172 int update_time2;
173 struct timer_list update_timer;
174 };
176 static void acpi_update_delay(struct acpi_sbs *sbs);
177 static int acpi_sbs_update_run(struct acpi_sbs *sbs, int data_type);
179 /* --------------------------------------------------------------------------
180 SMBus Communication
181 -------------------------------------------------------------------------- */
183 static void acpi_battery_smbus_err_handler(struct acpi_ec_smbus *smbus)
184 {
185 union i2c_smbus_data data;
186 int result = 0;
187 char *err_str;
188 int err_number;
190 data.word = 0;
192 result = smbus->adapter.algo->
193 smbus_xfer(&smbus->adapter,
194 ACPI_SB_SMBUS_ADDR,
195 0, I2C_SMBUS_READ, 0x16, I2C_SMBUS_BLOCK_DATA, &data);
197 err_number = (data.word & 0x000f);
199 switch (data.word & 0x000f) {
200 case 0x0000:
201 err_str = "unexpected bus error";
202 break;
203 case 0x0001:
204 err_str = "busy";
205 break;
206 case 0x0002:
207 err_str = "reserved command";
208 break;
209 case 0x0003:
210 err_str = "unsupported command";
211 break;
212 case 0x0004:
213 err_str = "access denied";
214 break;
215 case 0x0005:
216 err_str = "overflow/underflow";
217 break;
218 case 0x0006:
219 err_str = "bad size";
220 break;
221 case 0x0007:
222 err_str = "unknown error";
223 break;
224 default:
225 err_str = "unrecognized error";
226 }
227 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
228 "%s: ret %i, err %i\n", err_str, result, err_number));
229 }
231 static int
232 acpi_sbs_smbus_read_word(struct acpi_ec_smbus *smbus, int addr, int func,
233 u16 * word,
234 void (*err_handler) (struct acpi_ec_smbus * smbus))
235 {
236 union i2c_smbus_data data;
237 int result = 0;
238 int i;
240 if (err_handler == NULL) {
241 err_handler = acpi_battery_smbus_err_handler;
242 }
244 for (i = 0; i < MAX_SMBUS_ERR; i++) {
245 result =
246 smbus->adapter.algo->smbus_xfer(&smbus->adapter, addr, 0,
247 I2C_SMBUS_READ, func,
248 I2C_SMBUS_WORD_DATA, &data);
249 if (result) {
250 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
251 "try %i: smbus->adapter.algo->smbus_xfer() failed\n",
252 i));
253 if (err_handler) {
254 err_handler(smbus);
255 }
256 } else {
257 *word = data.word;
258 break;
259 }
260 }
262 return result;
263 }
265 static int
266 acpi_sbs_smbus_read_str(struct acpi_ec_smbus *smbus, int addr, int func,
267 char *str,
268 void (*err_handler) (struct acpi_ec_smbus * smbus))
269 {
270 union i2c_smbus_data data;
271 int result = 0;
272 int i;
274 if (err_handler == NULL) {
275 err_handler = acpi_battery_smbus_err_handler;
276 }
278 for (i = 0; i < MAX_SMBUS_ERR; i++) {
279 result =
280 smbus->adapter.algo->smbus_xfer(&smbus->adapter, addr, 0,
281 I2C_SMBUS_READ, func,
282 I2C_SMBUS_BLOCK_DATA,
283 &data);
284 if (result) {
285 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
286 "try %i: smbus->adapter.algo->smbus_xfer() failed\n",
287 i));
288 if (err_handler) {
289 err_handler(smbus);
290 }
291 } else {
292 strncpy(str, (const char *)data.block + 1,
293 data.block[0]);
294 str[data.block[0]] = 0;
295 break;
296 }
297 }
299 return result;
300 }
302 static int
303 acpi_sbs_smbus_write_word(struct acpi_ec_smbus *smbus, int addr, int func,
304 int word,
305 void (*err_handler) (struct acpi_ec_smbus * smbus))
306 {
307 union i2c_smbus_data data;
308 int result = 0;
309 int i;
311 if (err_handler == NULL) {
312 err_handler = acpi_battery_smbus_err_handler;
313 }
315 data.word = word;
317 for (i = 0; i < MAX_SMBUS_ERR; i++) {
318 result =
319 smbus->adapter.algo->smbus_xfer(&smbus->adapter, addr, 0,
320 I2C_SMBUS_WRITE, func,
321 I2C_SMBUS_WORD_DATA, &data);
322 if (result) {
323 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
324 "try %i: smbus->adapter.algo"
325 "->smbus_xfer() failed\n", i));
326 if (err_handler) {
327 err_handler(smbus);
328 }
329 } else {
330 break;
331 }
332 }
334 return result;
335 }
337 /* --------------------------------------------------------------------------
338 Smart Battery System Management
339 -------------------------------------------------------------------------- */
341 /* Smart Battery */
343 static int acpi_sbs_generate_event(struct acpi_device *device,
344 int event, int state, char *bid, char *class)
345 {
346 char bid_saved[5];
347 char class_saved[20];
348 int result = 0;
350 strcpy(bid_saved, acpi_device_bid(device));
351 strcpy(class_saved, acpi_device_class(device));
353 strcpy(acpi_device_bid(device), bid);
354 strcpy(acpi_device_class(device), class);
356 result = acpi_bus_generate_event(device, event, state);
358 strcpy(acpi_device_bid(device), bid_saved);
359 strcpy(acpi_device_class(device), class_saved);
361 return result;
362 }
364 static int acpi_battery_get_present(struct acpi_battery *battery)
365 {
366 s16 state;
367 int result = 0;
368 int is_present = 0;
370 result = acpi_sbs_smbus_read_word(battery->sbs->smbus,
371 ACPI_SBSM_SMBUS_ADDR, 0x01,
372 &state, NULL);
373 if (result) {
374 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
375 "acpi_sbs_smbus_read_word() failed"));
376 }
377 if (!result) {
378 is_present = (state & 0x000f) & (1 << battery->id);
379 }
380 battery->battery_present = is_present;
382 return result;
383 }
385 static int acpi_battery_is_present(struct acpi_battery *battery)
386 {
387 return (battery->battery_present);
388 }
390 static int acpi_ac_is_present(struct acpi_sbs *sbs)
391 {
392 return (sbs->ac_present);
393 }
395 static int acpi_battery_select(struct acpi_battery *battery)
396 {
397 struct acpi_ec_smbus *smbus = battery->sbs->smbus;
398 int result = 0;
399 s16 state;
400 int foo;
402 if (battery->sbs->sbsm_present) {
404 /* Take special care not to knobble other nibbles of
405 * state (aka selector_state), since
406 * it causes charging to halt on SBSELs */
408 result =
409 acpi_sbs_smbus_read_word(smbus, ACPI_SBSM_SMBUS_ADDR, 0x01,
410 &state, NULL);
411 if (result) {
412 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
413 "acpi_sbs_smbus_read_word() failed\n"));
414 goto end;
415 }
417 foo = (state & 0x0fff) | (1 << (battery->id + 12));
418 result =
419 acpi_sbs_smbus_write_word(smbus, ACPI_SBSM_SMBUS_ADDR, 0x01,
420 foo, NULL);
421 if (result) {
422 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
423 "acpi_sbs_smbus_write_word() failed\n"));
424 goto end;
425 }
426 }
428 end:
429 return result;
430 }
432 static int acpi_sbsm_get_info(struct acpi_sbs *sbs)
433 {
434 struct acpi_ec_smbus *smbus = sbs->smbus;
435 int result = 0;
436 s16 battery_system_info;
438 result = acpi_sbs_smbus_read_word(smbus, ACPI_SBSM_SMBUS_ADDR, 0x04,
439 &battery_system_info, NULL);
440 if (result) {
441 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
442 "acpi_sbs_smbus_read_word() failed\n"));
443 goto end;
444 }
446 sbs->sbsm_batteries_supported = battery_system_info & 0x000f;
448 end:
450 return result;
451 }
453 static int acpi_battery_get_info(struct acpi_battery *battery)
454 {
455 struct acpi_ec_smbus *smbus = battery->sbs->smbus;
456 int result = 0;
457 s16 battery_mode;
458 s16 specification_info;
460 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x03,
461 &battery_mode,
462 &acpi_battery_smbus_err_handler);
463 if (result) {
464 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
465 "acpi_sbs_smbus_read_word() failed\n"));
466 goto end;
467 }
468 battery->info.capacity_mode = (battery_mode & 0x8000) >> 15;
470 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x10,
471 &battery->info.full_charge_capacity,
472 &acpi_battery_smbus_err_handler);
473 if (result) {
474 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
475 "acpi_sbs_smbus_read_word() failed\n"));
476 goto end;
477 }
479 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x18,
480 &battery->info.design_capacity,
481 &acpi_battery_smbus_err_handler);
483 if (result) {
484 goto end;
485 }
487 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x19,
488 &battery->info.design_voltage,
489 &acpi_battery_smbus_err_handler);
490 if (result) {
491 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
492 "acpi_sbs_smbus_read_word() failed\n"));
493 goto end;
494 }
496 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x1a,
497 &specification_info,
498 &acpi_battery_smbus_err_handler);
499 if (result) {
500 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
501 "acpi_sbs_smbus_read_word() failed\n"));
502 goto end;
503 }
505 switch ((specification_info & 0x0f00) >> 8) {
506 case 1:
507 battery->info.vscale = 10;
508 break;
509 case 2:
510 battery->info.vscale = 100;
511 break;
512 case 3:
513 battery->info.vscale = 1000;
514 break;
515 default:
516 battery->info.vscale = 1;
517 }
519 switch ((specification_info & 0xf000) >> 12) {
520 case 1:
521 battery->info.ipscale = 10;
522 break;
523 case 2:
524 battery->info.ipscale = 100;
525 break;
526 case 3:
527 battery->info.ipscale = 1000;
528 break;
529 default:
530 battery->info.ipscale = 1;
531 }
533 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x1c,
534 &battery->info.serial_number,
535 &acpi_battery_smbus_err_handler);
536 if (result) {
537 goto end;
538 }
540 result = acpi_sbs_smbus_read_str(smbus, ACPI_SB_SMBUS_ADDR, 0x20,
541 battery->info.manufacturer_name,
542 &acpi_battery_smbus_err_handler);
543 if (result) {
544 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
545 "acpi_sbs_smbus_read_str() failed\n"));
546 goto end;
547 }
549 result = acpi_sbs_smbus_read_str(smbus, ACPI_SB_SMBUS_ADDR, 0x21,
550 battery->info.device_name,
551 &acpi_battery_smbus_err_handler);
552 if (result) {
553 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
554 "acpi_sbs_smbus_read_str() failed\n"));
555 goto end;
556 }
558 result = acpi_sbs_smbus_read_str(smbus, ACPI_SB_SMBUS_ADDR, 0x22,
559 battery->info.device_chemistry,
560 &acpi_battery_smbus_err_handler);
561 if (result) {
562 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
563 "acpi_sbs_smbus_read_str() failed\n"));
564 goto end;
565 }
567 end:
568 return result;
569 }
571 static void acpi_update_delay(struct acpi_sbs *sbs)
572 {
573 if (sbs->zombie) {
574 return;
575 }
576 if (sbs->update_time2 > 0) {
577 msleep(sbs->update_time2 * 1000);
578 }
579 }
581 static int acpi_battery_get_state(struct acpi_battery *battery)
582 {
583 struct acpi_ec_smbus *smbus = battery->sbs->smbus;
584 int result = 0;
586 acpi_update_delay(battery->sbs);
587 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x09,
588 &battery->state.voltage,
589 &acpi_battery_smbus_err_handler);
590 if (result) {
591 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
592 "acpi_sbs_smbus_read_word() failed\n"));
593 goto end;
594 }
596 acpi_update_delay(battery->sbs);
597 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x0a,
598 &battery->state.amperage,
599 &acpi_battery_smbus_err_handler);
600 if (result) {
601 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
602 "acpi_sbs_smbus_read_word() failed\n"));
603 goto end;
604 }
606 acpi_update_delay(battery->sbs);
607 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x0f,
608 &battery->state.remaining_capacity,
609 &acpi_battery_smbus_err_handler);
610 if (result) {
611 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
612 "acpi_sbs_smbus_read_word() failed\n"));
613 goto end;
614 }
616 acpi_update_delay(battery->sbs);
617 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x12,
618 &battery->state.average_time_to_empty,
619 &acpi_battery_smbus_err_handler);
620 if (result) {
621 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
622 "acpi_sbs_smbus_read_word() failed\n"));
623 goto end;
624 }
626 acpi_update_delay(battery->sbs);
627 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x13,
628 &battery->state.average_time_to_full,
629 &acpi_battery_smbus_err_handler);
630 if (result) {
631 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
632 "acpi_sbs_smbus_read_word() failed\n"));
633 goto end;
634 }
636 acpi_update_delay(battery->sbs);
637 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x16,
638 &battery->state.battery_status,
639 &acpi_battery_smbus_err_handler);
640 if (result) {
641 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
642 "acpi_sbs_smbus_read_word() failed\n"));
643 goto end;
644 }
646 acpi_update_delay(battery->sbs);
648 end:
649 return result;
650 }
652 static int acpi_battery_get_alarm(struct acpi_battery *battery)
653 {
654 struct acpi_ec_smbus *smbus = battery->sbs->smbus;
655 int result = 0;
657 result = acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x01,
658 &battery->alarm.remaining_capacity,
659 &acpi_battery_smbus_err_handler);
660 if (result) {
661 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
662 "acpi_sbs_smbus_read_word() failed\n"));
663 goto end;
664 }
666 acpi_update_delay(battery->sbs);
668 end:
670 return result;
671 }
673 static int acpi_battery_set_alarm(struct acpi_battery *battery,
674 unsigned long alarm)
675 {
676 struct acpi_ec_smbus *smbus = battery->sbs->smbus;
677 int result = 0;
678 s16 battery_mode;
679 int foo;
681 result = acpi_battery_select(battery);
682 if (result) {
683 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
684 "acpi_battery_select() failed\n"));
685 goto end;
686 }
688 /* If necessary, enable the alarm */
690 if (alarm > 0) {
691 result =
692 acpi_sbs_smbus_read_word(smbus, ACPI_SB_SMBUS_ADDR, 0x03,
693 &battery_mode,
694 &acpi_battery_smbus_err_handler);
695 if (result) {
696 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
697 "acpi_sbs_smbus_read_word() failed\n"));
698 goto end;
699 }
701 result =
702 acpi_sbs_smbus_write_word(smbus, ACPI_SB_SMBUS_ADDR, 0x01,
703 battery_mode & 0xbfff,
704 &acpi_battery_smbus_err_handler);
705 if (result) {
706 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
707 "acpi_sbs_smbus_write_word() failed\n"));
708 goto end;
709 }
710 }
712 foo = alarm / (battery->info.capacity_mode ? 10 : 1);
713 result = acpi_sbs_smbus_write_word(smbus, ACPI_SB_SMBUS_ADDR, 0x01,
714 foo,
715 &acpi_battery_smbus_err_handler);
716 if (result) {
717 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
718 "acpi_sbs_smbus_write_word() failed\n"));
719 goto end;
720 }
722 end:
724 return result;
725 }
727 static int acpi_battery_set_mode(struct acpi_battery *battery)
728 {
729 int result = 0;
730 s16 battery_mode;
732 if (capacity_mode == DEF_CAPACITY_UNIT) {
733 goto end;
734 }
736 result = acpi_sbs_smbus_read_word(battery->sbs->smbus,
737 ACPI_SB_SMBUS_ADDR, 0x03,
738 &battery_mode, NULL);
739 if (result) {
740 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
741 "acpi_sbs_smbus_read_word() failed\n"));
742 goto end;
743 }
745 if (capacity_mode == MAH_CAPACITY_UNIT) {
746 battery_mode &= 0x7fff;
747 } else {
748 battery_mode |= 0x8000;
749 }
750 result = acpi_sbs_smbus_write_word(battery->sbs->smbus,
751 ACPI_SB_SMBUS_ADDR, 0x03,
752 battery_mode, NULL);
753 if (result) {
754 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
755 "acpi_sbs_smbus_write_word() failed\n"));
756 goto end;
757 }
759 result = acpi_sbs_smbus_read_word(battery->sbs->smbus,
760 ACPI_SB_SMBUS_ADDR, 0x03,
761 &battery_mode, NULL);
762 if (result) {
763 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
764 "acpi_sbs_smbus_read_word() failed\n"));
765 goto end;
766 }
768 end:
769 return result;
770 }
772 static int acpi_battery_init(struct acpi_battery *battery)
773 {
774 int result = 0;
776 result = acpi_battery_select(battery);
777 if (result) {
778 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
779 "acpi_battery_init() failed\n"));
780 goto end;
781 }
783 result = acpi_battery_set_mode(battery);
784 if (result) {
785 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
786 "acpi_battery_set_mode() failed\n"));
787 goto end;
788 }
790 result = acpi_battery_get_info(battery);
791 if (result) {
792 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
793 "acpi_battery_get_info() failed\n"));
794 goto end;
795 }
797 result = acpi_battery_get_state(battery);
798 if (result) {
799 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
800 "acpi_battery_get_state() failed\n"));
801 goto end;
802 }
804 result = acpi_battery_get_alarm(battery);
805 if (result) {
806 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
807 "acpi_battery_get_alarm() failed\n"));
808 goto end;
809 }
811 end:
812 return result;
813 }
815 static int acpi_ac_get_present(struct acpi_sbs *sbs)
816 {
817 struct acpi_ec_smbus *smbus = sbs->smbus;
818 int result = 0;
819 s16 charger_status;
821 result = acpi_sbs_smbus_read_word(smbus, ACPI_SBC_SMBUS_ADDR, 0x13,
822 &charger_status, NULL);
824 if (result) {
825 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
826 "acpi_sbs_smbus_read_word() failed\n"));
827 goto end;
828 }
830 sbs->ac_present = (charger_status & 0x8000) >> 15;
832 end:
834 return result;
835 }
837 /* --------------------------------------------------------------------------
838 FS Interface (/proc/acpi)
839 -------------------------------------------------------------------------- */
841 /* Generic Routines */
843 static int
844 acpi_sbs_generic_add_fs(struct proc_dir_entry **dir,
845 struct proc_dir_entry *parent_dir,
846 char *dir_name,
847 struct file_operations *info_fops,
848 struct file_operations *state_fops,
849 struct file_operations *alarm_fops, void *data)
850 {
851 struct proc_dir_entry *entry = NULL;
853 if (!*dir) {
854 *dir = proc_mkdir(dir_name, parent_dir);
855 if (!*dir) {
856 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
857 "proc_mkdir() failed\n"));
858 return -ENODEV;
859 }
860 (*dir)->owner = THIS_MODULE;
861 }
863 /* 'info' [R] */
864 if (info_fops) {
865 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
866 if (!entry) {
867 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
868 "create_proc_entry() failed\n"));
869 } else {
870 entry->proc_fops = info_fops;
871 entry->data = data;
872 entry->owner = THIS_MODULE;
873 }
874 }
876 /* 'state' [R] */
877 if (state_fops) {
878 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
879 if (!entry) {
880 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
881 "create_proc_entry() failed\n"));
882 } else {
883 entry->proc_fops = state_fops;
884 entry->data = data;
885 entry->owner = THIS_MODULE;
886 }
887 }
889 /* 'alarm' [R/W] */
890 if (alarm_fops) {
891 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
892 if (!entry) {
893 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
894 "create_proc_entry() failed\n"));
895 } else {
896 entry->proc_fops = alarm_fops;
897 entry->data = data;
898 entry->owner = THIS_MODULE;
899 }
900 }
902 return 0;
903 }
905 static void
906 acpi_sbs_generic_remove_fs(struct proc_dir_entry **dir,
907 struct proc_dir_entry *parent_dir)
908 {
910 if (*dir) {
911 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
912 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
913 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
914 remove_proc_entry((*dir)->name, parent_dir);
915 *dir = NULL;
916 }
918 }
920 /* Smart Battery Interface */
922 static struct proc_dir_entry *acpi_battery_dir = NULL;
924 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
925 {
926 struct acpi_battery *battery = (struct acpi_battery *)seq->private;
927 int cscale;
928 int result = 0;
930 if (battery->sbs->zombie) {
931 return -ENODEV;
932 }
934 down(&sbs_sem);
936 if (update_mode == REQUEST_UPDATE_MODE) {
937 result = acpi_sbs_update_run(battery->sbs, DATA_TYPE_INFO);
938 if (result) {
939 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
940 "acpi_sbs_update_run() failed\n"));
941 }
942 }
944 if (acpi_battery_is_present(battery)) {
945 seq_printf(seq, "present: yes\n");
946 } else {
947 seq_printf(seq, "present: no\n");
948 goto end;
949 }
951 if (battery->info.capacity_mode) {
952 cscale = battery->info.vscale * battery->info.ipscale;
953 } else {
954 cscale = battery->info.ipscale;
955 }
956 seq_printf(seq, "design capacity: %i%s",
957 battery->info.design_capacity * cscale,
958 battery->info.capacity_mode ? "0 mWh\n" : " mAh\n");
960 seq_printf(seq, "last full capacity: %i%s",
961 battery->info.full_charge_capacity * cscale,
962 battery->info.capacity_mode ? "0 mWh\n" : " mAh\n");
964 seq_printf(seq, "battery technology: rechargeable\n");
966 seq_printf(seq, "design voltage: %i mV\n",
967 battery->info.design_voltage * battery->info.vscale);
969 seq_printf(seq, "design capacity warning: unknown\n");
970 seq_printf(seq, "design capacity low: unknown\n");
971 seq_printf(seq, "capacity granularity 1: unknown\n");
972 seq_printf(seq, "capacity granularity 2: unknown\n");
974 seq_printf(seq, "model number: %s\n",
975 battery->info.device_name);
977 seq_printf(seq, "serial number: %i\n",
978 battery->info.serial_number);
980 seq_printf(seq, "battery type: %s\n",
981 battery->info.device_chemistry);
983 seq_printf(seq, "OEM info: %s\n",
984 battery->info.manufacturer_name);
986 end:
988 up(&sbs_sem);
990 return result;
991 }
993 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
994 {
995 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
996 }
998 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
999 {
1000 struct acpi_battery *battery = (struct acpi_battery *)seq->private;
1001 int result = 0;
1002 int cscale;
1003 int foo;
1005 if (battery->sbs->zombie) {
1006 return -ENODEV;
1009 down(&sbs_sem);
1011 if (update_mode == REQUEST_UPDATE_MODE) {
1012 result = acpi_sbs_update_run(battery->sbs, DATA_TYPE_STATE);
1013 if (result) {
1014 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1015 "acpi_sbs_update_run() failed\n"));
1019 if (acpi_battery_is_present(battery)) {
1020 seq_printf(seq, "present: yes\n");
1021 } else {
1022 seq_printf(seq, "present: no\n");
1023 goto end;
1026 if (battery->info.capacity_mode) {
1027 cscale = battery->info.vscale * battery->info.ipscale;
1028 } else {
1029 cscale = battery->info.ipscale;
1032 if (battery->state.battery_status & 0x0010) {
1033 seq_printf(seq, "capacity state: critical\n");
1034 } else {
1035 seq_printf(seq, "capacity state: ok\n");
1037 if (battery->state.amperage < 0) {
1038 seq_printf(seq, "charging state: discharging\n");
1039 foo = battery->state.remaining_capacity * cscale * 60 /
1040 (battery->state.average_time_to_empty == 0 ? 1 :
1041 battery->state.average_time_to_empty);
1042 seq_printf(seq, "present rate: %i%s\n",
1043 foo, battery->info.capacity_mode ? "0 mW" : " mA");
1044 } else if (battery->state.amperage > 0) {
1045 seq_printf(seq, "charging state: charging\n");
1046 foo = (battery->info.full_charge_capacity -
1047 battery->state.remaining_capacity) * cscale * 60 /
1048 (battery->state.average_time_to_full == 0 ? 1 :
1049 battery->state.average_time_to_full);
1050 seq_printf(seq, "present rate: %i%s\n",
1051 foo, battery->info.capacity_mode ? "0 mW" : " mA");
1052 } else {
1053 seq_printf(seq, "charging state: charged\n");
1054 seq_printf(seq, "present rate: 0 %s\n",
1055 battery->info.capacity_mode ? "mW" : "mA");
1058 seq_printf(seq, "remaining capacity: %i%s",
1059 battery->state.remaining_capacity * cscale,
1060 battery->info.capacity_mode ? "0 mWh\n" : " mAh\n");
1062 seq_printf(seq, "present voltage: %i mV\n",
1063 battery->state.voltage * battery->info.vscale);
1065 end:
1067 up(&sbs_sem);
1069 return result;
1072 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
1074 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
1077 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
1079 struct acpi_battery *battery = (struct acpi_battery *)seq->private;
1080 int result = 0;
1081 int cscale;
1083 if (battery->sbs->zombie) {
1084 return -ENODEV;
1087 down(&sbs_sem);
1089 if (update_mode == REQUEST_UPDATE_MODE) {
1090 result = acpi_sbs_update_run(battery->sbs, DATA_TYPE_ALARM);
1091 if (result) {
1092 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1093 "acpi_sbs_update_run() failed\n"));
1097 if (!acpi_battery_is_present(battery)) {
1098 seq_printf(seq, "present: no\n");
1099 goto end;
1102 if (battery->info.capacity_mode) {
1103 cscale = battery->info.vscale * battery->info.ipscale;
1104 } else {
1105 cscale = battery->info.ipscale;
1108 seq_printf(seq, "alarm: ");
1109 if (battery->alarm.remaining_capacity) {
1110 seq_printf(seq, "%i%s",
1111 battery->alarm.remaining_capacity * cscale,
1112 battery->info.capacity_mode ? "0 mWh\n" : " mAh\n");
1113 } else {
1114 seq_printf(seq, "disabled\n");
1117 end:
1119 up(&sbs_sem);
1121 return result;
1124 static ssize_t
1125 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
1126 size_t count, loff_t * ppos)
1128 struct seq_file *seq = (struct seq_file *)file->private_data;
1129 struct acpi_battery *battery = (struct acpi_battery *)seq->private;
1130 char alarm_string[12] = { '\0' };
1131 int result, old_alarm, new_alarm;
1133 if (battery->sbs->zombie) {
1134 return -ENODEV;
1137 down(&sbs_sem);
1139 if (!acpi_battery_is_present(battery)) {
1140 result = -ENODEV;
1141 goto end;
1144 if (count > sizeof(alarm_string) - 1) {
1145 result = -EINVAL;
1146 goto end;
1149 if (copy_from_user(alarm_string, buffer, count)) {
1150 result = -EFAULT;
1151 goto end;
1154 alarm_string[count] = 0;
1156 old_alarm = battery->alarm.remaining_capacity;
1157 new_alarm = simple_strtoul(alarm_string, NULL, 0);
1159 result = acpi_battery_set_alarm(battery, new_alarm);
1160 if (result) {
1161 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1162 "acpi_battery_set_alarm() failed\n"));
1163 (void)acpi_battery_set_alarm(battery, old_alarm);
1164 goto end;
1166 result = acpi_battery_get_alarm(battery);
1167 if (result) {
1168 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1169 "acpi_battery_get_alarm() failed\n"));
1170 (void)acpi_battery_set_alarm(battery, old_alarm);
1171 goto end;
1174 end:
1175 up(&sbs_sem);
1177 if (result) {
1178 return result;
1179 } else {
1180 return count;
1184 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
1186 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
1189 static struct file_operations acpi_battery_info_fops = {
1190 .open = acpi_battery_info_open_fs,
1191 .read = seq_read,
1192 .llseek = seq_lseek,
1193 .release = single_release,
1194 .owner = THIS_MODULE,
1195 };
1197 static struct file_operations acpi_battery_state_fops = {
1198 .open = acpi_battery_state_open_fs,
1199 .read = seq_read,
1200 .llseek = seq_lseek,
1201 .release = single_release,
1202 .owner = THIS_MODULE,
1203 };
1205 static struct file_operations acpi_battery_alarm_fops = {
1206 .open = acpi_battery_alarm_open_fs,
1207 .read = seq_read,
1208 .write = acpi_battery_write_alarm,
1209 .llseek = seq_lseek,
1210 .release = single_release,
1211 .owner = THIS_MODULE,
1212 };
1214 /* Legacy AC Adapter Interface */
1216 static struct proc_dir_entry *acpi_ac_dir = NULL;
1218 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
1220 struct acpi_sbs *sbs = (struct acpi_sbs *)seq->private;
1221 int result;
1223 if (sbs->zombie) {
1224 return -ENODEV;
1227 down(&sbs_sem);
1229 if (update_mode == REQUEST_UPDATE_MODE) {
1230 result = acpi_sbs_update_run(sbs, DATA_TYPE_AC_STATE);
1231 if (result) {
1232 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1233 "acpi_sbs_update_run() failed\n"));
1237 seq_printf(seq, "state: %s\n",
1238 sbs->ac_present ? "on-line" : "off-line");
1240 up(&sbs_sem);
1242 return 0;
1245 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
1247 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
1250 static struct file_operations acpi_ac_state_fops = {
1251 .open = acpi_ac_state_open_fs,
1252 .read = seq_read,
1253 .llseek = seq_lseek,
1254 .release = single_release,
1255 .owner = THIS_MODULE,
1256 };
1258 /* --------------------------------------------------------------------------
1259 Driver Interface
1260 -------------------------------------------------------------------------- */
1262 /* Smart Battery */
1264 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
1266 int is_present;
1267 int result;
1268 char dir_name[32];
1269 struct acpi_battery *battery;
1271 battery = &sbs->battery[id];
1273 battery->alive = 0;
1275 battery->init_state = 0;
1276 battery->id = id;
1277 battery->sbs = sbs;
1279 result = acpi_battery_select(battery);
1280 if (result) {
1281 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1282 "acpi_battery_select() failed\n"));
1283 goto end;
1286 result = acpi_battery_get_present(battery);
1287 if (result) {
1288 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1289 "acpi_battery_get_present() failed\n"));
1290 goto end;
1293 is_present = acpi_battery_is_present(battery);
1295 if (is_present) {
1296 result = acpi_battery_init(battery);
1297 if (result) {
1298 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1299 "acpi_battery_init() failed\n"));
1300 goto end;
1302 battery->init_state = 1;
1305 (void)sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1307 result = acpi_sbs_generic_add_fs(&battery->battery_entry,
1308 acpi_battery_dir,
1309 dir_name,
1310 &acpi_battery_info_fops,
1311 &acpi_battery_state_fops,
1312 &acpi_battery_alarm_fops, battery);
1313 if (result) {
1314 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1315 "acpi_sbs_generic_add_fs() failed\n"));
1316 goto end;
1318 battery->alive = 1;
1320 end:
1321 return result;
1324 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
1327 if (sbs->battery[id].battery_entry) {
1328 acpi_sbs_generic_remove_fs(&(sbs->battery[id].battery_entry),
1329 acpi_battery_dir);
1333 static int acpi_ac_add(struct acpi_sbs *sbs)
1335 int result;
1337 result = acpi_ac_get_present(sbs);
1338 if (result) {
1339 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1340 "acpi_ac_get_present() failed\n"));
1341 goto end;
1344 result = acpi_sbs_generic_add_fs(&sbs->ac_entry,
1345 acpi_ac_dir,
1346 ACPI_AC_DIR_NAME,
1347 NULL, &acpi_ac_state_fops, NULL, sbs);
1348 if (result) {
1349 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1350 "acpi_sbs_generic_add_fs() failed\n"));
1351 goto end;
1354 end:
1356 return result;
1359 static void acpi_ac_remove(struct acpi_sbs *sbs)
1362 if (sbs->ac_entry) {
1363 acpi_sbs_generic_remove_fs(&sbs->ac_entry, acpi_ac_dir);
1367 static void acpi_sbs_update_queue_run(unsigned long data)
1369 acpi_os_execute(OSL_GPE_HANDLER, acpi_sbs_update_queue, (void *)data);
1372 static int acpi_sbs_update_run(struct acpi_sbs *sbs, int data_type)
1374 struct acpi_battery *battery;
1375 int result = 0;
1376 int old_ac_present;
1377 int old_battery_present;
1378 int new_ac_present;
1379 int new_battery_present;
1380 int id;
1381 char dir_name[32];
1382 int do_battery_init, do_ac_init;
1383 s16 old_remaining_capacity;
1385 if (sbs->zombie) {
1386 goto end;
1389 old_ac_present = acpi_ac_is_present(sbs);
1391 result = acpi_ac_get_present(sbs);
1392 if (result) {
1393 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1394 "acpi_ac_get_present() failed\n"));
1397 new_ac_present = acpi_ac_is_present(sbs);
1399 do_ac_init = (old_ac_present != new_ac_present);
1401 if (data_type == DATA_TYPE_AC_STATE) {
1402 goto end;
1405 for (id = 0; id < MAX_SBS_BAT; id++) {
1406 battery = &sbs->battery[id];
1407 if (battery->alive == 0) {
1408 continue;
1411 old_remaining_capacity = battery->state.remaining_capacity;
1413 old_battery_present = acpi_battery_is_present(battery);
1415 result = acpi_battery_select(battery);
1416 if (result) {
1417 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1418 "acpi_battery_select() failed\n"));
1420 if (sbs->zombie) {
1421 goto end;
1424 result = acpi_battery_get_present(battery);
1425 if (result) {
1426 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1427 "acpi_battery_get_present() failed\n"));
1429 if (sbs->zombie) {
1430 goto end;
1433 new_battery_present = acpi_battery_is_present(battery);
1435 do_battery_init = ((old_battery_present != new_battery_present)
1436 && new_battery_present);
1438 if (sbs->zombie) {
1439 goto end;
1441 if (do_ac_init || do_battery_init ||
1442 update_info_mode || sbs->update_info_mode) {
1443 if (sbs->update_info_mode) {
1444 sbs->update_info_mode = 0;
1445 } else {
1446 sbs->update_info_mode = 1;
1448 result = acpi_battery_init(battery);
1449 if (result) {
1450 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1451 "acpi_battery_init() "
1452 "failed\n"));
1455 if (data_type == DATA_TYPE_INFO) {
1456 continue;
1459 if (sbs->zombie) {
1460 goto end;
1462 if (new_battery_present) {
1463 result = acpi_battery_get_alarm(battery);
1464 if (result) {
1465 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1466 "acpi_battery_get_alarm() "
1467 "failed\n"));
1469 if (data_type == DATA_TYPE_ALARM) {
1470 continue;
1473 result = acpi_battery_get_state(battery);
1474 if (result) {
1475 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1476 "acpi_battery_get_state() "
1477 "failed\n"));
1480 if (sbs->zombie) {
1481 goto end;
1483 if (data_type != DATA_TYPE_COMMON) {
1484 continue;
1487 if (old_battery_present != new_battery_present) {
1488 (void)sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1489 result = acpi_sbs_generate_event(sbs->device,
1490 ACPI_SBS_BATTERY_NOTIFY_STATUS,
1491 new_battery_present,
1492 dir_name,
1493 ACPI_BATTERY_CLASS);
1494 if (result) {
1495 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1496 "acpi_sbs_generate_event() "
1497 "failed\n"));
1500 if (old_remaining_capacity != battery->state.remaining_capacity) {
1501 (void)sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
1502 result = acpi_sbs_generate_event(sbs->device,
1503 ACPI_SBS_BATTERY_NOTIFY_STATUS,
1504 new_battery_present,
1505 dir_name,
1506 ACPI_BATTERY_CLASS);
1507 if (result) {
1508 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1509 "acpi_sbs_generate_event() failed\n"));
1514 if (sbs->zombie) {
1515 goto end;
1517 if (data_type != DATA_TYPE_COMMON) {
1518 goto end;
1521 if (old_ac_present != new_ac_present) {
1522 result = acpi_sbs_generate_event(sbs->device,
1523 ACPI_SBS_AC_NOTIFY_STATUS,
1524 new_ac_present,
1525 ACPI_AC_DIR_NAME,
1526 ACPI_AC_CLASS);
1527 if (result) {
1528 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1529 "acpi_sbs_generate_event() failed\n"));
1533 end:
1534 return result;
1537 static void acpi_sbs_update_queue(void *data)
1539 struct acpi_sbs *sbs = data;
1540 unsigned long delay = -1;
1541 int result;
1543 if (sbs->zombie) {
1544 goto end;
1547 result = acpi_sbs_update_run(sbs, DATA_TYPE_COMMON);
1548 if (result) {
1549 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1550 "acpi_sbs_update_run() failed\n"));
1553 if (sbs->zombie) {
1554 goto end;
1557 if (update_mode == REQUEST_UPDATE_MODE) {
1558 goto end;
1561 delay = jiffies + HZ * update_time;
1562 sbs->update_timer.data = (unsigned long)data;
1563 sbs->update_timer.function = acpi_sbs_update_queue_run;
1564 sbs->update_timer.expires = delay;
1565 add_timer(&sbs->update_timer);
1566 end:
1570 static int acpi_sbs_add(struct acpi_device *device)
1572 struct acpi_sbs *sbs = NULL;
1573 struct acpi_ec_hc *ec_hc = NULL;
1574 int result, remove_result = 0;
1575 unsigned long sbs_obj;
1576 int id, cnt;
1577 acpi_status status = AE_OK;
1579 sbs = kmalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
1580 if (!sbs) {
1581 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "kmalloc() failed\n"));
1582 return -ENOMEM;
1584 memset(sbs, 0, sizeof(struct acpi_sbs));
1586 cnt = 0;
1587 while (cnt < 10) {
1588 cnt++;
1589 ec_hc = acpi_get_ec_hc(device);
1590 if (ec_hc) {
1591 break;
1593 msleep(1000);
1596 if (!ec_hc) {
1597 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1598 "acpi_get_ec_hc() failed: "
1599 "NO driver found for EC HC SMBus\n"));
1600 result = -ENODEV;
1601 goto end;
1604 sbs->device = device;
1605 sbs->smbus = ec_hc->smbus;
1607 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
1608 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
1609 acpi_driver_data(device) = sbs;
1611 sbs->update_time = 0;
1612 sbs->update_time2 = 0;
1614 result = acpi_ac_add(sbs);
1615 if (result) {
1616 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "acpi_ac_add() failed\n"));
1617 goto end;
1619 result = acpi_evaluate_integer(device->handle, "_SBS", NULL, &sbs_obj);
1620 if (ACPI_FAILURE(result)) {
1621 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1622 "acpi_evaluate_integer() failed\n"));
1623 result = -EIO;
1624 goto end;
1627 if (sbs_obj > 0) {
1628 result = acpi_sbsm_get_info(sbs);
1629 if (result) {
1630 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1631 "acpi_sbsm_get_info() failed\n"));
1632 goto end;
1634 sbs->sbsm_present = 1;
1636 if (sbs->sbsm_present == 0) {
1637 result = acpi_battery_add(sbs, 0);
1638 if (result) {
1639 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1640 "acpi_battery_add() failed\n"));
1641 goto end;
1643 } else {
1644 for (id = 0; id < MAX_SBS_BAT; id++) {
1645 if ((sbs->sbsm_batteries_supported & (1 << id))) {
1646 result = acpi_battery_add(sbs, id);
1647 if (result) {
1648 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1649 "acpi_battery_add() "
1650 "failed\n"));
1651 goto end;
1657 sbs->handle = device->handle;
1659 init_timer(&sbs->update_timer);
1660 if (update_mode == QUEUE_UPDATE_MODE) {
1661 status = acpi_os_execute(OSL_GPE_HANDLER,
1662 acpi_sbs_update_queue, (void *)sbs);
1663 if (status != AE_OK) {
1664 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1665 "acpi_os_execute() failed\n"));
1668 sbs->update_time = update_time;
1669 sbs->update_time2 = update_time2;
1671 printk(KERN_INFO PREFIX "%s [%s]\n",
1672 acpi_device_name(device), acpi_device_bid(device));
1674 end:
1675 if (result) {
1676 remove_result = acpi_sbs_remove(device, 0);
1677 if (remove_result) {
1678 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1679 "acpi_sbs_remove() failed\n"));
1683 return result;
1686 int acpi_sbs_remove(struct acpi_device *device, int type)
1688 struct acpi_sbs *sbs = (struct acpi_sbs *)acpi_driver_data(device);
1689 int id;
1691 if (!device || !sbs) {
1692 return -EINVAL;
1695 sbs->zombie = 1;
1696 sbs->update_time = 0;
1697 sbs->update_time2 = 0;
1698 del_timer_sync(&sbs->update_timer);
1699 acpi_os_wait_events_complete(NULL);
1700 del_timer_sync(&sbs->update_timer);
1702 for (id = 0; id < MAX_SBS_BAT; id++) {
1703 acpi_battery_remove(sbs, id);
1706 acpi_ac_remove(sbs);
1708 kfree(sbs);
1710 return 0;
1713 static int __init acpi_sbs_init(void)
1715 int result = 0;
1717 if (acpi_disabled)
1718 return -ENODEV;
1720 init_MUTEX(&sbs_sem);
1722 if (capacity_mode != DEF_CAPACITY_UNIT
1723 && capacity_mode != MAH_CAPACITY_UNIT
1724 && capacity_mode != MWH_CAPACITY_UNIT) {
1725 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "acpi_sbs_init: "
1726 "invalid capacity_mode = %d\n",
1727 capacity_mode));
1728 return -EINVAL;
1731 acpi_ac_dir = acpi_lock_ac_dir();
1732 if (!acpi_ac_dir) {
1733 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1734 "acpi_lock_ac_dir() failed\n"));
1735 return -ENODEV;
1738 acpi_battery_dir = acpi_lock_battery_dir();
1739 if (!acpi_battery_dir) {
1740 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1741 "acpi_lock_battery_dir() failed\n"));
1742 return -ENODEV;
1745 result = acpi_bus_register_driver(&acpi_sbs_driver);
1746 if (result < 0) {
1747 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1748 "acpi_bus_register_driver() failed\n"));
1749 return -ENODEV;
1752 return 0;
1755 static void __exit acpi_sbs_exit(void)
1758 acpi_bus_unregister_driver(&acpi_sbs_driver);
1760 acpi_unlock_ac_dir(acpi_ac_dir);
1761 acpi_ac_dir = NULL;
1762 acpi_unlock_battery_dir(acpi_battery_dir);
1763 acpi_battery_dir = NULL;
1765 return;
1768 module_init(acpi_sbs_init);
1769 module_exit(acpi_sbs_exit);