1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
|
/*
* APM (Advanced Power Management) BIOS Device Driver
*
* Copyright (c) 1994 UKAI, Fumitoshi.
* Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
* Copyright (c) 1996 Nate Williams <nate@FreeBSD.org>
* Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org>
*
* This software may be used, modified, copied, and distributed, in
* both source and binary form provided that the above copyright and
* these terms are retained. Under no circumstances is the author
* responsible for the proper functioning of this software, nor does
* the author assume any responsibility for damages incurred with its
* use.
*
* Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/eventhandler.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <sys/reboot.h>
#include <sys/bus.h>
#include <sys/select.h>
#include <sys/poll.h>
#include <sys/fcntl.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/signalvar.h>
#include <sys/sysctl.h>
#include <machine/apm_bios.h>
#include <machine/segments.h>
#include <machine/clock.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <sys/syslog.h>
#include <machine/pc/bios.h>
#include <machine/vm86.h>
static int apm_display __P((int newstate));
static void apm_resume __P((void));
static int apm_bioscall(void);
static int apm_check_function_supported __P((u_int version, u_int func));
static u_long apm_version;
#define APM_NEVENTS 16
#define APM_NPMEV 13
int apm_evindex;
/* static data */
struct apm_softc {
int initialized, active, bios_busy;
int always_halt_cpu, slow_idle_cpu;
int disabled, disengaged;
int standby_countdown, suspend_countdown;
u_int minorversion, majorversion;
u_int intversion, connectmode;
u_int standbys, suspends;
struct bios_args bios;
struct apmhook sc_suspend;
struct apmhook sc_resume;
struct selinfo sc_rsel;
int sc_flags;
int event_count;
int event_ptr;
struct apm_event_info event_list[APM_NEVENTS];
u_char event_filter[APM_NPMEV];
};
#define SCFLAG_ONORMAL 0x0000001
#define SCFLAG_OCTL 0x0000002
#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
#define APMDEV(dev) (minor(dev)&0x0f)
#define APMDEV_NORMAL 0
#define APMDEV_CTL 8
static struct apm_softc apm_softc;
static struct apmhook *hook[NAPM_HOOK]; /* XXX */
#define is_enabled(foo) ((foo) ? "enabled" : "disabled")
/* Map version number to integer (keeps ordering of version numbers) */
#define INTVERSION(major, minor) ((major)*100 + (minor))
static struct callout_handle apm_timeout_ch =
CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch);
static timeout_t apm_timeout;
static d_open_t apmopen;
static d_close_t apmclose;
static d_write_t apmwrite;
static d_ioctl_t apmioctl;
static d_poll_t apmpoll;
#define CDEV_MAJOR 39
static struct cdevsw apm_cdevsw = {
/* open */ apmopen,
/* close */ apmclose,
/* read */ noread,
/* write */ apmwrite,
/* ioctl */ apmioctl,
/* stop */ nostop,
/* reset */ noreset,
/* devtotty */ nodevtotty,
/* poll */ apmpoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "apm",
/* parms */ noparms,
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* maxio */ 0,
/* bmaj */ -1
};
static int apm_suspend_delay = 1;
static int apm_standby_delay = 1;
SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
/*
* return 0 if the function successfull,
* return 1 if the function unsuccessfull,
* return -1 if the function unsupported.
*/
static int
apm_bioscall(void)
{
struct apm_softc *sc = &apm_softc;
int errno = 0;
u_int apm_func = sc->bios.r.eax & 0xff;
if (!apm_check_function_supported(sc->intversion, apm_func)) {
#ifdef APM_DEBUG
printf("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
apm_func, sc->majorversion, sc->minorversion);
#endif
return (-1);
}
sc->bios_busy = 1;
if (sc->connectmode == APM_PROT32CONNECT) {
set_bios_selectors(&sc->bios.seg,
BIOSCODE_FLAG | BIOSDATA_FLAG);
errno = bios32(&sc->bios.r,
sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
} else {
errno = bios16(&sc->bios, NULL);
}
sc->bios_busy = 0;
return (errno);
}
/* check whether APM function is supported (1) or not (0). */
static int
apm_check_function_supported(u_int version, u_int func)
{
/* except driver version */
if (func == APM_DRVVERSION) {
return (1);
}
switch (version) {
case INTVERSION(1, 0):
if (func > APM_GETPMEVENT) {
return (0); /* not supported */
}
break;
case INTVERSION(1, 1):
if (func > APM_ENGAGEDISENGAGEPM &&
func < APM_OEMFUNC) {
return (0); /* not supported */
}
break;
case INTVERSION(1, 2):
break;
}
return (1); /* supported */
}
/* enable/disable power management */
static int
apm_enable_disable_pm(int enable)
{
struct apm_softc *sc = &apm_softc;
sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
if (sc->intversion >= INTVERSION(1, 1))
sc->bios.r.ebx = PMDV_ALLDEV;
else
sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
sc->bios.r.ecx = enable;
sc->bios.r.edx = 0;
return (apm_bioscall());
}
/* register driver version (APM 1.1 or later) */
static int
apm_driver_version(int version)
{
struct apm_softc *sc = &apm_softc;
sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
sc->bios.r.ebx = 0x0;
sc->bios.r.ecx = version;
sc->bios.r.edx = 0;
if (apm_bioscall() == 0 && sc->bios.r.eax == version)
return (0);
/* Some old BIOSes don't return the connection version in %ax. */
if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
return (0);
return (1);
}
/* engage/disengage power management (APM 1.1 or later) */
static int
apm_engage_disengage_pm(int engage)
{
struct apm_softc *sc = &apm_softc;
sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
sc->bios.r.ebx = PMDV_ALLDEV;
sc->bios.r.ecx = engage;
sc->bios.r.edx = 0;
return (apm_bioscall());
}
/* get PM event */
static u_int
apm_getevent(void)
{
struct apm_softc *sc = &apm_softc;
sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
sc->bios.r.ebx = 0;
sc->bios.r.ecx = 0;
sc->bios.r.edx = 0;
if (apm_bioscall())
return (PMEV_NOEVENT);
return (sc->bios.r.ebx & 0xffff);
}
/* suspend entire system */
static int
apm_suspend_system(int state)
{
struct apm_softc *sc = &apm_softc;
sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
sc->bios.r.ebx = PMDV_ALLDEV;
sc->bios.r.ecx = state;
sc->bios.r.edx = 0;
if (apm_bioscall()) {
printf("Entire system suspend failure: errcode = %d\n",
0xff & (sc->bios.r.eax >> 8));
return 1;
}
return 0;
}
/* Display control */
/*
* Experimental implementation: My laptop machine can't handle this function
* If your laptop can control the display via APM, please inform me.
* HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
*/
static int
apm_display(int newstate)
{
struct apm_softc *sc = &apm_softc;
sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
sc->bios.r.ebx = PMDV_DISP0;
sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
sc->bios.r.edx = 0;
if (apm_bioscall()) {
printf("Display off failure: errcode = %d\n",
0xff & (sc->bios.r.eax >> 8));
return 1;
}
return 0;
}
/*
* Turn off the entire system.
*/
static void
apm_power_off(void *junk, int howto)
{
struct apm_softc *sc = &apm_softc;
/* Not halting powering off, or not active */
if (!(howto & RB_POWEROFF) || !apm_softc.active)
return;
sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
sc->bios.r.ebx = PMDV_ALLDEV;
sc->bios.r.ecx = PMST_OFF;
sc->bios.r.edx = 0;
(void) apm_bioscall();
}
/* APM Battery low handler */
static void
apm_battery_low(void)
{
printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
}
/* APM hook manager */
static struct apmhook *
apm_add_hook(struct apmhook **list, struct apmhook *ah)
{
int s;
struct apmhook *p, *prev;
#ifdef APM_DEBUG
printf("Add hook \"%s\"\n", ah->ah_name);
#endif
s = splhigh();
if (ah == NULL)
panic("illegal apm_hook!");
prev = NULL;
for (p = *list; p != NULL; prev = p, p = p->ah_next)
if (p->ah_order > ah->ah_order)
break;
if (prev == NULL) {
ah->ah_next = *list;
*list = ah;
} else {
ah->ah_next = prev->ah_next;
prev->ah_next = ah;
}
splx(s);
return ah;
}
static void
apm_del_hook(struct apmhook **list, struct apmhook *ah)
{
int s;
struct apmhook *p, *prev;
s = splhigh();
prev = NULL;
for (p = *list; p != NULL; prev = p, p = p->ah_next)
if (p == ah)
goto deleteit;
panic("Tried to delete unregistered apm_hook.");
goto nosuchnode;
deleteit:
if (prev != NULL)
prev->ah_next = p->ah_next;
else
*list = p->ah_next;
nosuchnode:
splx(s);
}
/* APM driver calls some functions automatically */
static void
apm_execute_hook(struct apmhook *list)
{
struct apmhook *p;
for (p = list; p != NULL; p = p->ah_next) {
#ifdef APM_DEBUG
printf("Execute APM hook \"%s.\"\n", p->ah_name);
#endif
if ((*(p->ah_fun))(p->ah_arg))
printf("Warning: APM hook \"%s\" failed", p->ah_name);
}
}
/* establish an apm hook */
struct apmhook *
apm_hook_establish(int apmh, struct apmhook *ah)
{
if (apmh < 0 || apmh >= NAPM_HOOK)
return NULL;
return apm_add_hook(&hook[apmh], ah);
}
/* disestablish an apm hook */
void
apm_hook_disestablish(int apmh, struct apmhook *ah)
{
if (apmh < 0 || apmh >= NAPM_HOOK)
return;
apm_del_hook(&hook[apmh], ah);
}
static struct timeval suspend_time;
static struct timeval diff_time;
static int
apm_default_resume(void *arg)
{
int pl;
u_int second, minute, hour;
struct timeval resume_time, tmp_time;
/* modified for adjkerntz */
pl = splsoftclock();
inittodr(0); /* adjust time to RTC */
microtime(&resume_time);
getmicrotime(&tmp_time);
timevaladd(&tmp_time, &diff_time);
#ifdef FIXME
/* XXX THIS DOESN'T WORK!!! */
time = tmp_time;
#endif
#ifdef APM_FIXUP_CALLTODO
/* Calculate the delta time suspended */
timevalsub(&resume_time, &suspend_time);
/* Fixup the calltodo list with the delta time. */
adjust_timeout_calltodo(&resume_time);
#endif /* APM_FIXUP_CALLTODOK */
splx(pl);
#ifndef APM_FIXUP_CALLTODO
second = resume_time.tv_sec - suspend_time.tv_sec;
#else /* APM_FIXUP_CALLTODO */
/*
* We've already calculated resume_time to be the delta between
* the suspend and the resume.
*/
second = resume_time.tv_sec;
#endif /* APM_FIXUP_CALLTODO */
hour = second / 3600;
second %= 3600;
minute = second / 60;
second %= 60;
log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n",
hour, minute, second);
return 0;
}
static int
apm_default_suspend(void *arg)
{
int pl;
pl = splsoftclock();
microtime(&diff_time);
inittodr(0);
microtime(&suspend_time);
timevalsub(&diff_time, &suspend_time);
splx(pl);
return 0;
}
static int apm_record_event __P((struct apm_softc *, u_int));
static void apm_processevent(void);
static u_int apm_op_inprog = 0;
static void
apm_do_suspend(void)
{
struct apm_softc *sc = &apm_softc;
int error;
if (!sc)
return;
apm_op_inprog = 0;
sc->suspends = sc->suspend_countdown = 0;
if (sc->initialized) {
error = DEVICE_SUSPEND(root_bus);
/*
* XXX Shouldn't ignore the error like this, but should
* instead fix the newbus code. Until that happens,
* I'm doing this to get suspend working again.
*/
if (error)
printf("DEVICE_SUSPEND error %d, ignored\n", error);
apm_execute_hook(hook[APM_HOOK_SUSPEND]);
if (apm_suspend_system(PMST_SUSPEND) == 0)
apm_processevent();
else
/* Failure, 'resume' the system again */
apm_execute_hook(hook[APM_HOOK_RESUME]);
}
}
static void
apm_do_standby(void)
{
struct apm_softc *sc = &apm_softc;
if (!sc)
return;
apm_op_inprog = 0;
sc->standbys = sc->standby_countdown = 0;
if (sc->initialized) {
/*
* As far as standby, we don't need to execute
* all of suspend hooks.
*/
apm_default_suspend(&apm_softc);
if (apm_suspend_system(PMST_STANDBY) == 0)
apm_processevent();
}
}
static void
apm_lastreq_notify(void)
{
struct apm_softc *sc = &apm_softc;
sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
sc->bios.r.ebx = PMDV_ALLDEV;
sc->bios.r.ecx = PMST_LASTREQNOTIFY;
sc->bios.r.edx = 0;
apm_bioscall();
}
static int
apm_lastreq_rejected(void)
{
struct apm_softc *sc = &apm_softc;
if (apm_op_inprog == 0) {
return 1; /* no operation in progress */
}
sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
sc->bios.r.ebx = PMDV_ALLDEV;
sc->bios.r.ecx = PMST_LASTREQREJECT;
sc->bios.r.edx = 0;
if (apm_bioscall()) {
#ifdef APM_DEBUG
printf("apm_lastreq_rejected: failed\n");
#endif
return 1;
}
apm_op_inprog = 0;
return 0;
}
/*
* Public interface to the suspend/resume:
*
* Execute suspend and resume hook before and after sleep, respectively.
*
*/
void
apm_suspend(int state)
{
struct apm_softc *sc = &apm_softc;
switch (state) {
case PMST_SUSPEND:
if (sc->suspends)
return;
sc->suspends++;
sc->suspend_countdown = apm_suspend_delay;
break;
case PMST_STANDBY:
if (sc->standbys)
return;
sc->standbys++;
sc->standby_countdown = apm_standby_delay;
break;
default:
printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
return;
}
apm_op_inprog++;
apm_lastreq_notify();
}
void
apm_resume(void)
{
struct apm_softc *sc = &apm_softc;
if (!sc)
return;
if (sc->initialized) {
DEVICE_RESUME(root_bus);
apm_execute_hook(hook[APM_HOOK_RESUME]);
}
}
/* get APM information */
static int
apm_get_info(apm_info_t aip)
{
struct apm_softc *sc = &apm_softc;
sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
sc->bios.r.ebx = PMDV_ALLDEV;
sc->bios.r.ecx = 0;
sc->bios.r.edx = 0xffff; /* default to unknown battery time */
if (apm_bioscall())
return 1;
aip->ai_infoversion = 1;
aip->ai_acline = (sc->bios.r.ebx >> 8) & 0xff;
aip->ai_batt_stat = sc->bios.r.ebx & 0xff;
aip->ai_batt_life = sc->bios.r.ecx & 0xff;
aip->ai_major = (u_int)sc->majorversion;
aip->ai_minor = (u_int)sc->minorversion;
aip->ai_status = (u_int)sc->active;
sc->bios.r.edx &= 0xffff;
if (sc->bios.r.edx == 0xffff) /* Time is unknown */
aip->ai_batt_time = -1;
else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
aip->ai_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
else /* Time is in seconds */
aip->ai_batt_time = sc->bios.r.edx;
sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
sc->bios.r.ebx = 0;
sc->bios.r.ecx = 0;
sc->bios.r.edx = 0;
if (apm_bioscall()) {
aip->ai_batteries = -1; /* Unknown */
aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
} else {
aip->ai_batteries = sc->bios.r.ebx & 0xff;
aip->ai_capabilities = sc->bios.r.ecx & 0xf;
}
bzero(aip->ai_spare, sizeof aip->ai_spare);
return 0;
}
/* inform APM BIOS that CPU is idle */
void
apm_cpu_idle(void)
{
struct apm_softc *sc = &apm_softc;
if (sc->active) {
sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
(void) apm_bioscall();
}
/*
* Some APM implementation halts CPU in BIOS, whenever
* "CPU-idle" function are invoked, but swtch() of
* FreeBSD halts CPU, therefore, CPU is halted twice
* in the sched loop. It makes the interrupt latency
* terribly long and be able to cause a serious problem
* in interrupt processing. We prevent it by removing
* "hlt" operation from swtch() and managed it under
* APM driver.
*/
if (!sc->active || sc->always_halt_cpu)
__asm("hlt"); /* wait for interrupt */
}
/* inform APM BIOS that CPU is busy */
void
apm_cpu_busy(void)
{
struct apm_softc *sc = &apm_softc;
/*
* The APM specification says this is only necessary if your BIOS
* slows down the processor in the idle task, otherwise it's not
* necessary.
*/
if (sc->slow_idle_cpu && sc->active) {
sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
apm_bioscall();
}
}
/*
* APM timeout routine:
*
* This routine is automatically called by timer once per second.
*/
static void
apm_timeout(void *dummy)
{
struct apm_softc *sc = &apm_softc;
if (apm_op_inprog)
apm_lastreq_notify();
if (sc->standbys && sc->standby_countdown-- <= 0)
apm_do_standby();
if (sc->suspends && sc->suspend_countdown-- <= 0)
apm_do_suspend();
if (!sc->bios_busy)
apm_processevent();
if (sc->active == 1)
/* Run slightly more oftan than 1 Hz */
apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 );
}
/* enable APM BIOS */
static void
apm_event_enable(void)
{
struct apm_softc *sc = &apm_softc;
#ifdef APM_DEBUG
printf("called apm_event_enable()\n");
#endif
if (sc->initialized) {
sc->active = 1;
apm_timeout(sc);
}
}
/* disable APM BIOS */
static void
apm_event_disable(void)
{
struct apm_softc *sc = &apm_softc;
#ifdef APM_DEBUG
printf("called apm_event_disable()\n");
#endif
if (sc->initialized) {
untimeout(apm_timeout, NULL, apm_timeout_ch);
sc->active = 0;
}
}
/* halt CPU in scheduling loop */
static void
apm_halt_cpu(void)
{
struct apm_softc *sc = &apm_softc;
if (sc->initialized)
sc->always_halt_cpu = 1;
}
/* don't halt CPU in scheduling loop */
static void
apm_not_halt_cpu(void)
{
struct apm_softc *sc = &apm_softc;
if (sc->initialized)
sc->always_halt_cpu = 0;
}
/* device driver definitions */
/*
* Create "connection point"
*/
static void
apm_identify(driver_t *driver, device_t parent)
{
device_t child;
child = BUS_ADD_CHILD(parent, 0, "apm", 0);
if (child == NULL)
panic("apm_identify");
}
/*
* probe for APM BIOS
*/
static int
apm_probe(device_t dev)
{
#define APM_KERNBASE KERNBASE
struct vm86frame vmf;
struct apm_softc *sc = &apm_softc;
int disabled, flags;
if (resource_int_value("apm", 0, "disabled", &disabled) == 0
&& disabled != 0)
return ENXIO;
device_set_desc(dev, "APM BIOS");
if ( device_get_unit(dev) > 0 ) {
printf("apm: Only one APM driver supported.\n");
return ENXIO;
}
if (resource_int_value("apm", 0, "flags", &flags) != 0)
flags = 0;
bzero(&vmf, sizeof(struct vm86frame)); /* safety */
bzero(&apm_softc, sizeof(apm_softc));
vmf.vmf_ah = APM_BIOS;
vmf.vmf_al = APM_INSTCHECK;
vmf.vmf_bx = 0;
if (vm86_intcall(APM_INT, &vmf))
return ENXIO; /* APM not found */
if (vmf.vmf_bx != 0x504d) {
printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
return ENXIO;
}
if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
printf("apm: protected mode connections are not supported\n");
return ENXIO;
}
apm_version = vmf.vmf_ax;
sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
vmf.vmf_ah = APM_BIOS;
vmf.vmf_al = APM_DISCONNECT;
vmf.vmf_bx = 0;
vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
vmf.vmf_ah = APM_BIOS;
vmf.vmf_al = APM_PROT32CONNECT;
vmf.vmf_bx = 0;
if (vm86_intcall(APM_INT, &vmf)) {
printf("apm: 32-bit connection error.\n");
return (ENXIO);
}
sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
sc->bios.seg.code32.limit = 0xffff;
sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
sc->bios.seg.code16.limit = 0xffff;
sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
sc->bios.seg.data.limit = 0xffff;
sc->bios.entry = vmf.vmf_ebx;
sc->connectmode = APM_PROT32CONNECT;
} else {
/* use 16-bit connection */
vmf.vmf_ah = APM_BIOS;
vmf.vmf_al = APM_PROT16CONNECT;
vmf.vmf_bx = 0;
if (vm86_intcall(APM_INT, &vmf)) {
printf("apm: 16-bit connection error.\n");
return (ENXIO);
}
sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
sc->bios.seg.code16.limit = 0xffff;
sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
sc->bios.seg.data.limit = 0xffff;
sc->bios.entry = vmf.vmf_bx;
sc->connectmode = APM_PROT16CONNECT;
}
return(0);
}
/*
* return 0 if the user will notice and handle the event,
* return 1 if the kernel driver should do so.
*/
static int
apm_record_event(struct apm_softc *sc, u_int event_type)
{
struct apm_event_info *evp;
if ((sc->sc_flags & SCFLAG_OPEN) == 0)
return 1; /* no user waiting */
if (sc->event_count == APM_NEVENTS)
return 1; /* overflow */
if (sc->event_filter[event_type] == 0)
return 1; /* not registered */
evp = &sc->event_list[sc->event_ptr];
sc->event_count++;
sc->event_ptr++;
sc->event_ptr %= APM_NEVENTS;
evp->type = event_type;
evp->index = ++apm_evindex;
selwakeup(&sc->sc_rsel);
return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
}
/* Process APM event */
static void
apm_processevent(void)
{
int apm_event;
struct apm_softc *sc = &apm_softc;
#ifdef APM_DEBUG
# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
printf("Received APM Event: " #symbol "\n");
#else
# define OPMEV_DEBUGMESSAGE(symbol) case symbol:
#endif
do {
apm_event = apm_getevent();
switch (apm_event) {
OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
if (apm_op_inprog == 0) {
apm_op_inprog++;
if (apm_record_event(sc, apm_event)) {
apm_suspend(PMST_STANDBY);
}
}
break;
OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
if (apm_op_inprog == 0) {
apm_op_inprog++;
if (apm_record_event(sc, apm_event)) {
apm_suspend(PMST_STANDBY);
}
}
break;
OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
apm_lastreq_notify();
if (apm_op_inprog == 0) {
apm_op_inprog++;
if (apm_record_event(sc, apm_event)) {
apm_do_suspend();
}
}
return; /* XXX skip the rest */
OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
apm_lastreq_notify();
if (apm_op_inprog == 0) {
apm_op_inprog++;
if (apm_record_event(sc, apm_event)) {
apm_do_suspend();
}
}
return; /* XXX skip the rest */
OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
apm_do_suspend();
break;
OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
apm_record_event(sc, apm_event);
apm_resume();
break;
OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
apm_record_event(sc, apm_event);
apm_resume();
break;
OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
apm_record_event(sc, apm_event);
apm_resume();
break;
OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
if (apm_record_event(sc, apm_event)) {
apm_battery_low();
apm_suspend(PMST_SUSPEND);
}
break;
OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
apm_record_event(sc, apm_event);
break;
OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
apm_record_event(sc, apm_event);
inittodr(0); /* adjust time to RTC */
break;
case PMEV_NOEVENT:
break;
default:
printf("Unknown Original APM Event 0x%x\n", apm_event);
break;
}
} while (apm_event != PMEV_NOEVENT);
}
/*
* Attach APM:
*
* Initialize APM driver
*/
static int
apm_attach(device_t dev)
{
struct apm_softc *sc = &apm_softc;
int flags;
int drv_version;
if (resource_int_value("apm", 0, "flags", &flags) != 0)
flags = 0;
if (flags & 0x20)
statclock_disable = 1;
sc->initialized = 0;
/* Must be externally enabled */
sc->active = 0;
/* Always call HLT in idle loop */
sc->always_halt_cpu = 1;
/* print bootstrap messages */
#ifdef APM_DEBUG
printf("apm: APM BIOS version %04x\n", apm_version);
printf("apm: Code16 0x%08x, Data 0x%08x\n",
sc->bios.seg.code16.base, sc->bios.seg.data.base);
printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
sc->bios.entry, is_enabled(sc->slow_idle_cpu),
is_enabled(!sc->disabled));
printf("apm: CS_limit=0x%x, DS_limit=0x%x\n",
sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
#endif /* APM_DEBUG */
#if 0
/*
* XXX this may not be needed anymore
*/
if ((flags & 0x10)) {
if ((flags & 0xf) >= 0x2) {
apm_driver_version(0x102);
}
if (!apm_version && (flags & 0xf) >= 0x1) {
apm_driver_version(0x101);
}
} else {
apm_driver_version(0x102);
if (!apm_version)
apm_driver_version(0x101);
}
#endif
/*
* In one test, apm bios version was 1.02; an attempt to register
* a 1.04 driver resulted in a 1.00 connection! Registering a
* 1.02 driver resulted in a 1.02 connection.
*/
drv_version = apm_version > 0x102 ? 0x102 : apm_version;
for (; drv_version > 0x100; drv_version--)
if (apm_driver_version(drv_version) == 0)
break;
sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
((drv_version & 0x000f) >> 0);
sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
((apm_version & 0x0f00) >> 8);
sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
#ifdef APM_DEBUG
if (sc->intversion >= INTVERSION(1, 1))
printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
#endif
printf("apm: found APM BIOS v%ld.%ld, connected at v%d.%d\n",
((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
sc->majorversion, sc->minorversion);
#ifdef APM_DEBUG
printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
#endif
/* enable power management */
if (sc->disabled) {
if (apm_enable_disable_pm(1)) {
#ifdef APM_DEBUG
printf("apm: *Warning* enable function failed! [%x]\n",
(sc->bios.r.eax >> 8) & 0xff);
#endif
}
}
/* engage power managment (APM 1.1 or later) */
if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
if (apm_engage_disengage_pm(1)) {
#ifdef APM_DEBUG
printf("apm: *Warning* engage function failed err=[%x]",
(sc->bios.r.eax >> 8) & 0xff);
printf(" (Docked or using external power?).\n");
#endif
}
}
/* default suspend hook */
sc->sc_suspend.ah_fun = apm_default_suspend;
sc->sc_suspend.ah_arg = sc;
sc->sc_suspend.ah_name = "default suspend";
sc->sc_suspend.ah_order = APM_MAX_ORDER;
/* default resume hook */
sc->sc_resume.ah_fun = apm_default_resume;
sc->sc_resume.ah_arg = sc;
sc->sc_resume.ah_name = "default resume";
sc->sc_resume.ah_order = APM_MIN_ORDER;
apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend);
apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume);
/* Power the system off using APM */
EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
SHUTDOWN_PRI_LAST);
sc->initialized = 1;
make_dev(&apm_cdevsw, 0, 0, 0, 0600, "apm");
return 0;
}
static int
apmopen(dev_t dev, int flag, int fmt, struct proc *p)
{
struct apm_softc *sc = &apm_softc;
int ctl = APMDEV(dev);
if (!sc->initialized)
return (ENXIO);
switch (ctl) {
case APMDEV_CTL:
if (!(flag & FWRITE))
return EINVAL;
if (sc->sc_flags & SCFLAG_OCTL)
return EBUSY;
sc->sc_flags |= SCFLAG_OCTL;
bzero(sc->event_filter, sizeof sc->event_filter);
break;
case APMDEV_NORMAL:
sc->sc_flags |= SCFLAG_ONORMAL;
break;
default:
return ENXIO;
break;
}
return 0;
}
static int
apmclose(dev_t dev, int flag, int fmt, struct proc *p)
{
struct apm_softc *sc = &apm_softc;
int ctl = APMDEV(dev);
switch (ctl) {
case APMDEV_CTL:
apm_lastreq_rejected();
sc->sc_flags &= ~SCFLAG_OCTL;
bzero(sc->event_filter, sizeof sc->event_filter);
break;
case APMDEV_NORMAL:
sc->sc_flags &= ~SCFLAG_ONORMAL;
break;
}
if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
sc->event_count = 0;
sc->event_ptr = 0;
}
return 0;
}
static int
apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
struct apm_softc *sc = &apm_softc;
struct apm_bios_arg *args;
int error = 0;
int ret;
int newstate;
if (!sc->initialized)
return (ENXIO);
#ifdef APM_DEBUG
printf("APM ioctl: cmd = 0x%x\n", cmd);
#endif
switch (cmd) {
case APMIO_SUSPEND:
if (sc->active)
apm_suspend(PMST_SUSPEND);
else
error = EINVAL;
break;
case APMIO_STANDBY:
if (sc->active)
apm_suspend(PMST_STANDBY);
else
error = EINVAL;
break;
case APMIO_GETINFO_OLD:
{
struct apm_info info;
apm_info_old_t aiop;
if (apm_get_info(&info))
error = ENXIO;
aiop = (apm_info_old_t)addr;
aiop->ai_major = info.ai_major;
aiop->ai_minor = info.ai_minor;
aiop->ai_acline = info.ai_acline;
aiop->ai_batt_stat = info.ai_batt_stat;
aiop->ai_batt_life = info.ai_batt_life;
aiop->ai_status = info.ai_status;
}
break;
case APMIO_GETINFO:
if (apm_get_info((apm_info_t)addr))
error = ENXIO;
break;
case APMIO_ENABLE:
apm_event_enable();
break;
case APMIO_DISABLE:
apm_event_disable();
break;
case APMIO_HALTCPU:
apm_halt_cpu();
break;
case APMIO_NOTHALTCPU:
apm_not_halt_cpu();
break;
case APMIO_DISPLAY:
newstate = *(int *)addr;
if (apm_display(newstate))
error = ENXIO;
break;
case APMIO_BIOS:
/* XXX compatibility with the old interface */
args = (struct apm_bios_arg *)addr;
sc->bios.r.eax = args->eax;
sc->bios.r.ebx = args->ebx;
sc->bios.r.ecx = args->ecx;
sc->bios.r.edx = args->edx;
sc->bios.r.esi = args->esi;
sc->bios.r.edi = args->edi;
if ((ret = apm_bioscall())) {
/*
* Return code 1 means bios call was unsuccessful.
* Error code is stored in %ah.
* Return code -1 means bios call was unsupported
* in the APM BIOS version.
*/
if (ret == -1) {
error = EINVAL;
}
} else {
/*
* Return code 0 means bios call was successful.
* We need only %al and can discard %ah.
*/
sc->bios.r.eax &= 0xff;
}
args->eax = sc->bios.r.eax;
args->ebx = sc->bios.r.ebx;
args->ecx = sc->bios.r.ecx;
args->edx = sc->bios.r.edx;
args->esi = sc->bios.r.esi;
args->edi = sc->bios.r.edi;
break;
default:
error = EINVAL;
break;
}
/* for /dev/apmctl */
if (APMDEV(dev) == APMDEV_CTL) {
struct apm_event_info *evp;
int i;
error = 0;
switch (cmd) {
case APMIO_NEXTEVENT:
if (!sc->event_count) {
error = EAGAIN;
} else {
evp = (struct apm_event_info *)addr;
i = sc->event_ptr + APM_NEVENTS - sc->event_count;
i %= APM_NEVENTS;
*evp = sc->event_list[i];
sc->event_count--;
}
break;
case APMIO_REJECTLASTREQ:
if (apm_lastreq_rejected()) {
error = EINVAL;
}
break;
default:
error = EINVAL;
break;
}
}
return error;
}
static int
apmwrite(dev_t dev, struct uio *uio, int ioflag)
{
struct apm_softc *sc = &apm_softc;
u_int event_type;
int error;
u_char enabled;
if (APMDEV(dev) != APMDEV_CTL)
return(ENODEV);
if (uio->uio_resid != sizeof(u_int))
return(E2BIG);
if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
return(error);
if (event_type < 0 || event_type >= APM_NPMEV)
return(EINVAL);
if (sc->event_filter[event_type] == 0) {
enabled = 1;
} else {
enabled = 0;
}
sc->event_filter[event_type] = enabled;
#ifdef APM_DEBUG
printf("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
#endif
return uio->uio_resid;
}
static int
apmpoll(dev_t dev, int events, struct proc *p)
{
struct apm_softc *sc = &apm_softc;
int revents = 0;
if (events & (POLLIN | POLLRDNORM)) {
if (sc->event_count) {
revents |= events & (POLLIN | POLLRDNORM);
} else {
selrecord(p, &sc->sc_rsel);
}
}
return (revents);
}
static device_method_t apm_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, apm_identify),
DEVMETHOD(device_probe, apm_probe),
DEVMETHOD(device_attach, apm_attach),
{ 0, 0 }
};
static driver_t apm_driver = {
"apm",
apm_methods,
1, /* no softc (XXX) */
};
static devclass_t apm_devclass;
DEV_DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, apm_cdevsw, 0, 0);
|