Pull sony-2.6.24 into release branch
[linux-2.6] / drivers / acpi / sbs.c
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);