summaryrefslogtreecommitdiffstats
path: root/sys/i386/isa/mcd.c
blob: 683b0e1798c21a7610efc9b575439d679b6ed38d (plain)
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
/*
 * Copyright 1993 by Holger Veit (data part)
 * Copyright 1993 by Brian Moore (audio part)
 * Changes Copyright 1993 by Gary Clark II
 *
 * Rewrote probe routine to work on newer Mitsumi drives.
 * Additional changes (C) 1994 by Jordan K. Hubbard
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This software was developed by Holger Veit and Brian Moore
 *	for use with "386BSD" and similar operating systems.
 *    "Similar operating systems" includes mainly non-profit oriented
 *    systems for research and education, including but not restricted to
 *    "NetBSD", "FreeBSD", "Mach" (by CMU).
 * 4. Neither the name of the developer(s) nor the name "386BSD"
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER(S) ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE DEVELOPER(S) BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *	$Id: mcd.c,v 1.15 1994/04/20 07:06:41 davidg Exp $
 */
static char COPYRIGHT[] = "mcd-driver (C)1993 by H.Veit & B.Moore";

#include "mcd.h"
#if NMCD > 0
#include "types.h"
#include "param.h"
#include "systm.h"
#include "conf.h"
#include "file.h"
#include "buf.h"
#include "stat.h"
#include "uio.h"
#include "ioctl.h"
#include "cdio.h"
#include "errno.h"
#include "dkbad.h"
#include "disklabel.h"
#include "i386/isa/isa.h"
#include "i386/isa/isa_device.h"
#include "mcdreg.h"

/* user definable options */
/*#define MCD_TO_WARNING_ON*/	/* define to get timeout messages */
/*#define MCDMINI*/ 		/* define for a mini configuration for boot kernel */


#ifdef MCDMINI
#define MCD_TRACE(fmt,a,b,c,d)
#ifdef MCD_TO_WARNING_ON
#undef MCD_TO_WARNING_ON
#endif
#else
#define MCD_TRACE(fmt,a,b,c,d)	{if (mcd_data[unit].debug) {printf("mcd%d st=%02x: ",unit,mcd_data[unit].status); printf(fmt,a,b,c,d);}}
#endif

#define mcd_part(dev)	((minor(dev)) & 7)
#define mcd_unit(dev)	(((minor(dev)) & 0x38) >> 3)
#define mcd_phys(dev)	(((minor(dev)) & 0x40) >> 6)
#define RAW_PART	0

/* flags */
#define MCDOPEN		0x0001	/* device opened */
#define MCDVALID	0x0002	/* parameters loaded */
#define MCDINIT		0x0004	/* device is init'd */
#define MCDWAIT		0x0008	/* waiting for something */
#define MCDLABEL	0x0010	/* label is read */
#define	MCDPROBING	0x0020	/* probing */
#define	MCDREADRAW	0x0040	/* read raw mode (2352 bytes) */
#define	MCDVOLINFO	0x0080	/* already read volinfo */
#define	MCDTOC		0x0100	/* already read toc */
#define	MCDMBXBSY	0x0200	/* local mbx is busy */

/* status */
#define	MCDAUDIOBSY	MCD_ST_AUDIOBSY		/* playing audio */
#define MCDDSKCHNG	MCD_ST_DSKCHNG		/* sensed change of disk */
#define MCDDSKIN	MCD_ST_DSKIN		/* sensed disk in drive */
#define MCDDOOROPEN	MCD_ST_DOOROPEN		/* sensed door open */

/* These are apparently the different states a mitsumi can get up to */
#define MCDCDABSENT	0x0030
#define MCDCDPRESENT	0x0020
#define MCDSCLOSED	0x0080
#define MCDSOPEN	0x00a0

/* toc */
#define MCD_MAXTOCS	104	/* from the Linux driver */
#define MCD_LASTPLUS1	170	/* special toc entry */

struct mcd_mbx {
	short		unit;
	short		port;
	short		retry;
	short		nblk;
	int		sz;
	u_long		skip;
	struct buf	*bp;
	int		p_offset;
	short		count;
};

struct mcd_data {
	short	config;
	short	flags;
	short	status;
	int	blksize;
	u_long	disksize;
	int	iobase;
	struct disklabel dlabel;
	int	partflags[MAXPARTITIONS];
	int	openflags;
	struct mcd_volinfo volinfo;
#ifndef MCDMINI
	struct mcd_qchninfo toc[MCD_MAXTOCS];
	short	audio_status;
	struct mcd_read2 lastpb;
#endif
	short	debug;
	struct buf head;		/* head of buf queue */
	struct mcd_mbx mbx;
} mcd_data[NMCD];

/* reader state machine */
#define MCD_S_BEGIN	0
#define MCD_S_BEGIN1	1
#define MCD_S_WAITSTAT	2
#define MCD_S_WAITMODE	3
#define MCD_S_WAITREAD	4

/* prototypes */
int	mcdopen(dev_t dev);
int	mcdclose(dev_t dev);
void	mcdstrategy(struct buf *bp);
int	mcdioctl(dev_t dev, int cmd, caddr_t addr, int flags);
int	mcdsize(dev_t dev);
static	void	mcd_done(struct mcd_mbx *mbx);
static	void	mcd_start(int unit);
static	int	mcd_getdisklabel(int unit);
static	void	mcd_configure(struct mcd_data *cd);
static	int	mcd_get(int unit, char *buf, int nmax);
static	void	mcd_setflags(int unit,struct mcd_data *cd);
static	int	mcd_getstat(int unit,int sflg);
static	int	mcd_send(int unit, int cmd,int nretrys);
static	int	bcd2bin(bcd_t b);
static	bcd_t	bin2bcd(int b);
static	void	hsg2msf(int hsg, bcd_t *msf);
static	int	msf2hsg(bcd_t *msf);
static	int	mcd_volinfo(int unit);
static	int	mcd_waitrdy(int port,int dly);
static 	void	mcd_doread(int state, struct mcd_mbx *mbxin);
#ifndef MCDMINI
static	int 	mcd_setmode(int unit, int mode);
static	int	mcd_getqchan(int unit, struct mcd_qchninfo *q);
static	int	mcd_subchan(int unit, struct ioc_read_subchannel *sc);
static	int	mcd_toc_header(int unit, struct ioc_toc_header *th);
static	int	mcd_read_toc(int unit);
static	int	mcd_toc_entry(int unit, struct ioc_read_toc_entry *te);
static	int	mcd_stop(int unit);
static	int	mcd_playtracks(int unit, struct ioc_play_track *pt);
static	int	mcd_play(int unit, struct mcd_read2 *pb);
static	int	mcd_pause(int unit);
static	int	mcd_resume(int unit);
#endif

extern	int	hz;
extern	int	mcd_probe(struct isa_device *dev);
extern	int	mcd_attach(struct isa_device *dev);
struct	isa_driver	mcddriver = { mcd_probe, mcd_attach, "mcd" };

#define mcd_put(port,byte)	outb(port,byte)

#define MCD_RETRYS	5
#define MCD_RDRETRYS	8

#define MCDBLK	2048	/* for cooked mode */
#define MCDRBLK	2352	/* for raw mode */

/* several delays */
#define RDELAY_WAITSTAT	300
#define RDELAY_WAITMODE	300
#define RDELAY_WAITREAD	800

#define DELAY_STATUS	10000l		/* 10000 * 1us */
#define DELAY_GETREPLY	200000l		/* 200000 * 2us */
#define DELAY_SEEKREAD	20000l		/* 20000 * 1us */
#define mcd_delay	DELAY

int mcd_attach(struct isa_device *dev)
{
	struct mcd_data *cd = mcd_data + dev->id_unit;
	int i;
	
	cd->iobase = dev->id_iobase;
	cd->flags |= MCDINIT;
	cd->openflags = 0;
	for (i=0; i<MAXPARTITIONS; i++) cd->partflags[i] = 0;

#ifdef NOTYET
	/* wire controller for interrupts and dma */
	mcd_configure(cd);
#endif

	return 1;
}

int mcdopen(dev_t dev)
{
	int unit,part,phys;
	struct mcd_data *cd;
	
	unit = mcd_unit(dev);
	if (unit >= NMCD)
		return ENXIO;

	cd = mcd_data + unit;
	part = mcd_part(dev);
	phys = mcd_phys(dev);
	
	/* not initialized*/
	if (!(cd->flags & MCDINIT))
		return ENXIO;

	/* invalidated in the meantime? mark all open part's invalid */
	if (!(cd->flags & MCDVALID) && cd->openflags)
		return ENXIO;

	if (mcd_getstat(unit,1) < 0)
		return ENXIO;

	/* XXX get a default disklabel */
	mcd_getdisklabel(unit);

	if (mcdsize(dev) < 0) {
		printf("mcd%d: failed to get disk size\n",unit);
		return ENXIO;
	} else
		cd->flags |= MCDVALID;

MCD_TRACE("open: partition=%d, disksize = %d, blksize=%d\n",
	part,cd->disksize,cd->blksize,0);

	if (part == RAW_PART ||
		(part < cd->dlabel.d_npartitions &&
		cd->dlabel.d_partitions[part].p_fstype != FS_UNUSED)) {
		cd->partflags[part] |= MCDOPEN;
		cd->openflags |= (1<<part);
		if (part == RAW_PART && phys != 0)
			cd->partflags[part] |= MCDREADRAW;
		return 0;
	}
	
	return ENXIO;
}

int mcdclose(dev_t dev)
{
	int unit,part,phys;
	struct mcd_data *cd;
	
	unit = mcd_unit(dev);
	if (unit >= NMCD)
		return ENXIO;

	cd = mcd_data + unit;
	part = mcd_part(dev);
	phys = mcd_phys(dev);
	
	if (!(cd->flags & MCDINIT))
		return ENXIO;

	mcd_getstat(unit,1);	/* get status */

	/* close channel */
	cd->partflags[part] &= ~(MCDOPEN|MCDREADRAW);
	cd->openflags &= ~(1<<part);
	MCD_TRACE("close: partition=%d\n",part,0,0,0);

	return 0;
}

void
mcdstrategy(struct buf *bp)
{
	struct mcd_data *cd;
	struct buf *qp;
	int s;
	
	int unit = mcd_unit(bp->b_dev);

	cd = mcd_data + unit;

	/* test validity */
/*MCD_TRACE("strategy: buf=0x%lx, unit=%ld, block#=%ld bcount=%ld\n",
	bp,unit,bp->b_blkno,bp->b_bcount);*/
	if (unit >= NMCD || bp->b_blkno < 0) {
		printf("mcdstrategy: unit = %d, blkno = %d, bcount = %d\n",
			unit, bp->b_blkno, bp->b_bcount);
		pg("mcd: mcdstratregy failure");
		bp->b_error = EINVAL;
		bp->b_flags |= B_ERROR;
		goto bad;
	}

	/* if device invalidated (e.g. media change, door open), error */
	if (!(cd->flags & MCDVALID)) {
MCD_TRACE("strategy: drive not valid\n",0,0,0,0);
		bp->b_error = EIO;
		goto bad;
	}

	/* read only */
	if (!(bp->b_flags & B_READ)) {
		bp->b_error = EROFS;
		goto bad;
	}
	
	/* no data to read */
	if (bp->b_bcount == 0)
		goto done;
	
	/* for non raw access, check partition limits */
	if (mcd_part(bp->b_dev) != RAW_PART) {
		if (!(cd->flags & MCDLABEL)) {
			bp->b_error = EIO;
			goto bad;
		}
		/* adjust transfer if necessary */
		if (bounds_check_with_label(bp,&cd->dlabel,1) <= 0) {
			goto done;
		}
	} else {
		bp->b_pblkno = bp->b_blkno;
		bp->b_resid = 0;
	}
	
	/* queue it */
	qp = &cd->head;
	s = splbio();
	disksort(qp,bp);
	splx(s);
	
	/* now check whether we can perform processing */
	mcd_start(unit);
	return;

bad:
	bp->b_flags |= B_ERROR;
done:
	bp->b_resid = bp->b_bcount;
	biodone(bp);
	return;
}

static void mcd_start(int unit)
{
	struct mcd_data *cd = mcd_data + unit;
	struct buf *bp, *qp = &cd->head;
	struct partition *p;
	int part;
	register s = splbio();
	
	if (cd->flags & MCDMBXBSY)
		return;

	if ((bp = qp->b_actf) != 0) {
		/* block found to process, dequeue */
		/*MCD_TRACE("mcd_start: found block bp=0x%x\n",bp,0,0,0);*/
		qp->b_actf = bp->b_actf;
		splx(s);
	} else {
		/* nothing to do */
		splx(s);
		return;
	}

	/* changed media? */
	if (!(cd->flags	& MCDVALID)) {
		MCD_TRACE("mcd_start: drive not valid\n",0,0,0,0);
		return;
	}

	p = cd->dlabel.d_partitions + mcd_part(bp->b_dev);

	cd->flags |= MCDMBXBSY;
	cd->mbx.unit = unit;
	cd->mbx.port = cd->iobase;
	cd->mbx.retry = MCD_RETRYS;
	cd->mbx.bp = bp;
	cd->mbx.p_offset = p->p_offset;

	/* calling the read routine */
	mcd_doread(MCD_S_BEGIN,&(cd->mbx));
	/* triggers mcd_start, when successful finished */
	return;
}

int mcdioctl(dev_t dev, int cmd, caddr_t addr, int flags)
{
	struct mcd_data *cd;
	int unit,part;
	
	unit = mcd_unit(dev);
	part = mcd_part(dev);
	cd = mcd_data + unit;

#ifdef MCDMINI
	return ENOTTY;
#else
	if (!(cd->flags & MCDVALID))
		return EIO;
MCD_TRACE("ioctl called 0x%x\n",cmd,0,0,0);

	switch (cmd) {
	case DIOCSBAD:
		return EINVAL;
	case DIOCGDINFO:
	case DIOCGPART:
	case DIOCWDINFO:
	case DIOCSDINFO:
	case DIOCWLABEL:
		return ENOTTY;
	case CDIOCPLAYTRACKS:
		return mcd_playtracks(unit, (struct ioc_play_track *) addr);
	case CDIOCPLAYBLOCKS:
		return mcd_play(unit, (struct mcd_read2 *) addr);
	case CDIOCREADSUBCHANNEL:
		return mcd_subchan(unit, (struct ioc_read_subchannel *) addr);
	case CDIOREADTOCHEADER:
		return mcd_toc_header(unit, (struct ioc_toc_header *) addr);
	case CDIOREADTOCENTRYS:
		return mcd_toc_entry(unit, (struct ioc_read_toc_entry *) addr);
	case CDIOCSETPATCH:
	case CDIOCGETVOL:
	case CDIOCSETVOL:
	case CDIOCSETMONO:
	case CDIOCSETSTERIO:
	case CDIOCSETMUTE:
	case CDIOCSETLEFT:
	case CDIOCSETRIGHT:
		return EINVAL;
	case CDIOCRESUME:
		return mcd_resume(unit);
	case CDIOCPAUSE:
		return mcd_pause(unit);
	case CDIOCSTART:
		return EINVAL;
	case CDIOCSTOP:
		return mcd_stop(unit);
	case CDIOCEJECT:
		return EINVAL;
	case CDIOCSETDEBUG:
		cd->debug = 1;
		return 0;
	case CDIOCCLRDEBUG:
		cd->debug = 0;
		return 0;
	case CDIOCRESET:
		return EINVAL;
	default:
		return ENOTTY;
	}
	/*NOTREACHED*/
#endif /*!MCDMINI*/
}

/* this could have been taken from scsi/cd.c, but it is not clear
 * whether the scsi cd driver is linked in
 */
static int mcd_getdisklabel(int unit)
{
	struct mcd_data *cd = mcd_data + unit;
	
	if (cd->flags & MCDLABEL)
		return -1;
	
	bzero(&cd->dlabel,sizeof(struct disklabel));
	strncpy(cd->dlabel.d_typename,"Mitsumi CD ROM ",16);
	strncpy(cd->dlabel.d_packname,"unknown        ",16);
	cd->dlabel.d_secsize 	= cd->blksize;
	cd->dlabel.d_nsectors	= 100;
	cd->dlabel.d_ntracks	= 1;
	cd->dlabel.d_ncylinders	= (cd->disksize/100)+1;
	cd->dlabel.d_secpercyl	= 100;
	cd->dlabel.d_secperunit	= cd->disksize;
	cd->dlabel.d_rpm	= 300;
	cd->dlabel.d_interleave	= 1;
	cd->dlabel.d_flags	= D_REMOVABLE;
	cd->dlabel.d_npartitions= 1;
	cd->dlabel.d_partitions[0].p_offset = 0;
	cd->dlabel.d_partitions[0].p_size = cd->disksize;
	cd->dlabel.d_partitions[0].p_fstype = 9;
	cd->dlabel.d_magic	= DISKMAGIC;
	cd->dlabel.d_magic2	= DISKMAGIC;
	cd->dlabel.d_checksum	= dkcksum(&cd->dlabel);
	
	cd->flags |= MCDLABEL;
	return 0;
}

int mcdsize(dev_t dev)
{
	int size;
	int unit = mcd_unit(dev);
	struct mcd_data *cd = mcd_data + unit;

	if (mcd_volinfo(unit) >= 0) {
		cd->blksize = MCDBLK;
		size = msf2hsg(cd->volinfo.vol_msf);
		cd->disksize = size * (MCDBLK/DEV_BSIZE);
		return 0;
	}
	return -1;
}

/***************************************************************
 * lower level of driver starts here
 **************************************************************/

#ifdef NOTDEF
static char
irqs[] = {
	0x00,0x00,0x10,0x20,0x00,0x30,0x00,0x00,
	0x00,0x10,0x40,0x50,0x00,0x00,0x00,0x00
};

static char
drqs[] = {
	0x00,0x01,0x00,0x03,0x00,0x05,0x06,0x07,
};
#endif

static void
mcd_configure(struct mcd_data *cd)
{
	outb(cd->iobase+mcd_config,cd->config);
}

/* Wait for non-busy - return 0 on timeout */
static int
twiddle_thumbs(int port, int unit, int count, char *whine)
{
	int i;

	for (i = 0; i < count; i++) {
		if (!(inb(port+MCD_FLAGS) & MCD_ST_BUSY)) {
			return 1;
		}
	}
#ifdef MCD_TO_WARNING_ON
	printf("mcd%d: timeout %s\n", unit, whine);
#endif
	return 0;
}

/* check to see if a Mitsumi CD-ROM is attached to the ISA bus */

int
mcd_probe(struct isa_device *dev)
{
	int port = dev->id_iobase;	
	int unit = dev->id_unit;
	int i, j;
	int status;
	unsigned char stbytes[3];

	mcd_data[unit].flags = MCDPROBING;

#ifdef NOTDEF
	/* get irq/drq configuration word */
	mcd_data[unit].config = irqs[dev->id_irq]; /* | drqs[dev->id_drq];*/
#else
	mcd_data[unit].config = 0;
#endif

	/* send a reset */
	outb(port+MCD_FLAGS, M_RESET);

	/*
	 * delay awhile by getting any pending garbage (old data) and
	 * throwing it away.
	 */
	for (i = 1000000; i != 0; i--) {
		inb(port+MCD_FLAGS);
	}

	/* Get status */
	outb(port+MCD_DATA, MCD_CMDGETSTAT);
	if (!twiddle_thumbs(port, unit, 1000000, "getting status")) {
		return 0;	/* Timeout */
	}
	status = inb(port+MCD_DATA);
	if (status != MCDCDABSENT && status != MCDCDPRESENT &&
		status != MCDSOPEN && status != MCDSCLOSED)
		return 0;	/* Not actually a Mitsumi drive here */
	/* Get version information */
	outb(port+MCD_DATA, MCD_CMDCONTINFO);
	for (j = 0; j < 3; j++) {
		if (!twiddle_thumbs(port, unit, 3000, "getting version info")) {
			return 0;
		}
		stbytes[j] = (inb(port+MCD_DATA) & 0xFF);
	}
	printf("mcd%d: version information is %x %c %x\n", unit,
		stbytes[0], stbytes[1], stbytes[2]);
	if (stbytes[1] >= 4) {
		outb(port+MCD_CTRL, M_PICKLE);
		printf("mcd%d: Adjusted for newer drive model\n", unit);
	}
	return 4;
}


static int
mcd_waitrdy(int port,int dly)
{
	int i;

	/* wait until xfer port senses data ready */
	for (i=0; i<dly; i++) {
		if ((inb(port+mcd_xfer) & MCD_ST_BUSY)==0)
			return 0;
		mcd_delay(1);
	}
	return -1;
}

static int
mcd_getreply(int unit,int dly)
{
	int	i;
	struct	mcd_data *cd = mcd_data + unit;
	int	port = cd->iobase;

	/* wait data to become ready */
	if (mcd_waitrdy(port,dly)<0) {
#ifdef MCD_TO_WARNING_ON
		printf("mcd%d: timeout getreply\n",unit);
#endif
		return -1;
	}

	/* get the data */
	return inb(port+mcd_status) & 0xFF;
}

static int
mcd_getstat(int unit,int sflg)
{
	int	i;
	struct	mcd_data *cd = mcd_data + unit;
	int	port = cd->iobase;

	/* get the status */
	if (sflg)
		outb(port+mcd_command, MCD_CMDGETSTAT);
	i = mcd_getreply(unit,DELAY_GETREPLY);
	if (i<0) return -1;

	cd->status = i;

	mcd_setflags(unit,cd);
	return cd->status;
}

static void
mcd_setflags(int unit, struct mcd_data *cd)
{
	/* check flags */
	if (cd->status & (MCDDSKCHNG|MCDDOOROPEN)) {
		MCD_TRACE("getstat: sensed DSKCHNG or DOOROPEN\n",0,0,0,0);
		cd->flags &= ~MCDVALID;
	}

#ifndef MCDMINI
	if (cd->status & MCDAUDIOBSY)
		cd->audio_status = CD_AS_PLAY_IN_PROGRESS;
	else if (cd->audio_status == CD_AS_PLAY_IN_PROGRESS)
		cd->audio_status = CD_AS_PLAY_COMPLETED;
#endif
}

static int
mcd_get(int unit, char *buf, int nmax)
{
	int port = mcd_data[unit].iobase;
	int i,k;
	
	for (i=0; i<nmax; i++) {
		/* wait for data */
		if ((k = mcd_getreply(unit,DELAY_GETREPLY)) < 0) {
#ifdef MCD_TO_WARNING_ON
			printf("mcd%d: timeout mcd_get\n",unit);
#endif
			return -1;
		}
		buf[i] = k;
	}
	return i;
}

static int
mcd_send(int unit, int cmd,int nretrys)
{
	int i,k;
	int port = mcd_data[unit].iobase;
	
/*MCD_TRACE("mcd_send: command = 0x%x\n",cmd,0,0,0);*/
	for (i=0; i<nretrys; i++) {
		outb(port+mcd_command, cmd);
		if ((k=mcd_getstat(unit,0)) != -1) {
			break;
		}
	}
	if (i == nretrys) {
		printf("mcd%d: mcd_send retry cnt exceeded\n",unit);
		return -1;
	}
/*MCD_TRACE("mcd_send: status = 0x%x\n",k,0,0,0);*/
	return 0;
}

static int
bcd2bin(bcd_t b)
{
	return (b >> 4) * 10 + (b & 15);
}

static bcd_t
bin2bcd(int b)
{
	return ((b / 10) << 4) | (b % 10);
}

static void
hsg2msf(int hsg, bcd_t *msf)
{
	hsg += 150;
	M_msf(msf) = bin2bcd(hsg / 4500);
	hsg %= 4500;
	S_msf(msf) = bin2bcd(hsg / 75);
	F_msf(msf) = bin2bcd(hsg % 75);
}

static int
msf2hsg(bcd_t *msf)
{
	return (bcd2bin(M_msf(msf)) * 60 +
		bcd2bin(S_msf(msf))) * 75 +
		bcd2bin(F_msf(msf)) - 150;
}

static int
mcd_volinfo(int unit)
{
	struct mcd_data *cd = mcd_data + unit;
	int i;

/*MCD_TRACE("mcd_volinfo: enter\n",0,0,0,0);*/

	/* Get the status, in case the disc has been changed */
	if (mcd_getstat(unit, 1) < 0) return EIO;

	/* Just return if we already have it */
	if (cd->flags & MCDVOLINFO) return 0;

	/* send volume info command */
	if (mcd_send(unit,MCD_CMDGETVOLINFO,MCD_RETRYS) < 0)
		return -1;

	/* get data */
	if (mcd_get(unit,(char*) &cd->volinfo,sizeof(struct mcd_volinfo)) < 0) {
		printf("mcd%d: mcd_volinfo: error read data\n",unit);
		return -1;
	}

	if (cd->volinfo.trk_low != 0 || cd->volinfo.trk_high != 0) {
		cd->flags |= MCDVOLINFO;	/* volinfo is OK */
		return 0;
	}

	return -1;
}

void
mcdintr(unit)
	int unit;
{
	int	port = mcd_data[unit].iobase;
	u_int	i;
	
	MCD_TRACE("stray interrupt xfer=0x%x\n",inb(port+mcd_xfer),0,0,0);

	/* just read out status and ignore the rest */
	if ((inb(port+mcd_xfer)&0xFF) != 0xFF) {
		i = inb(port+mcd_status);
	}
}

/* state machine to process read requests
 * initialize with MCD_S_BEGIN: calculate sizes, and read status
 * MCD_S_WAITSTAT: wait for status reply, set mode
 * MCD_S_WAITMODE: waits for status reply from set mode, set read command
 * MCD_S_WAITREAD: wait for read ready, read data
 */
static struct mcd_mbx *mbxsave;

static void
mcd_doread(int state, struct mcd_mbx *mbxin)
{
	struct mcd_mbx *mbx = (state!=MCD_S_BEGIN) ? mbxsave : mbxin;
	int	unit = mbx->unit;
	int	port = mbx->port;
	struct	buf *bp = mbx->bp;
	struct	mcd_data *cd = mcd_data + unit;

	int	rm,i,k;
	struct mcd_read2 rbuf;
	int	blknum;
	caddr_t	addr;

loop:
	switch (state) {
	case MCD_S_BEGIN:
		mbx = mbxsave = mbxin;

	case MCD_S_BEGIN1:
		/* get status */
		outb(port+mcd_command, MCD_CMDGETSTAT);
		mbx->count = RDELAY_WAITSTAT;
		timeout((timeout_func_t)mcd_doread,
			(caddr_t)MCD_S_WAITSTAT,hz/100); /* XXX */
		return;
	case MCD_S_WAITSTAT:
		untimeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITSTAT);
		if (mbx->count-- >= 0) {
			if (inb(port+mcd_xfer) & MCD_ST_BUSY) {
				timeout((timeout_func_t)mcd_doread,
				    (caddr_t)MCD_S_WAITSTAT,hz/100); /* XXX */
				return;
			}
			mcd_setflags(unit,cd);
			MCD_TRACE("got WAITSTAT delay=%d\n",
				RDELAY_WAITSTAT-mbx->count,0,0,0);
			/* reject, if audio active */
			if (cd->status & MCDAUDIOBSY) {
				printf("mcd%d: audio is active\n",unit);
				goto readerr;
			}

			/* to check for raw/cooked mode */
			if (cd->flags & MCDREADRAW) {
				rm = MCD_MD_RAW;
				mbx->sz = MCDRBLK;
			} else {
				rm = MCD_MD_COOKED;
				mbx->sz = cd->blksize;
			}

			mbx->count = RDELAY_WAITMODE;
		
			mcd_put(port+mcd_command, MCD_CMDSETMODE);
			mcd_put(port+mcd_command, rm);
			timeout((timeout_func_t)mcd_doread,
				(caddr_t)MCD_S_WAITMODE,hz/100); /* XXX */
			return;
		} else {
#ifdef MCD_TO_WARNING_ON
			printf("mcd%d: timeout getstatus\n",unit);
#endif
			goto readerr;
		}

	case MCD_S_WAITMODE:
		untimeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITMODE);
		if (mbx->count-- < 0) {
#ifdef MCD_TO_WARNING_ON
			printf("mcd%d: timeout set mode\n",unit);
#endif
			goto readerr;
		}
		if (inb(port+mcd_xfer) & MCD_ST_BUSY) {
			timeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITMODE,hz/100);
			return;
		}
		mcd_setflags(unit,cd);
		MCD_TRACE("got WAITMODE delay=%d\n",
			RDELAY_WAITMODE-mbx->count,0,0,0);
		/* for first block */
		mbx->nblk = (bp->b_bcount + (mbx->sz-1)) / mbx->sz;
		mbx->skip = 0;

nextblock:
		blknum 	= (bp->b_blkno / (mbx->sz/DEV_BSIZE))
			+ mbx->p_offset + mbx->skip/mbx->sz;

		MCD_TRACE("mcd_doread: read blknum=%d for bp=0x%x\n",
			blknum,bp,0,0);

		/* build parameter block */
		hsg2msf(blknum,rbuf.start_msf);

		/* send the read command */
		mcd_put(port+mcd_command,MCD_CMDREAD2);
		mcd_put(port+mcd_command,rbuf.start_msf[0]);
		mcd_put(port+mcd_command,rbuf.start_msf[1]);
		mcd_put(port+mcd_command,rbuf.start_msf[2]);
		mcd_put(port+mcd_command,0);
		mcd_put(port+mcd_command,0);
		mcd_put(port+mcd_command,1);
		mbx->count = RDELAY_WAITREAD;
		timeout((timeout_func_t)mcd_doread,
			(caddr_t)MCD_S_WAITREAD,hz/100); /* XXX */
		return;
	case MCD_S_WAITREAD:
		untimeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITREAD);
		if (mbx->count-- > 0) {
			k = inb(port+mcd_xfer);
			if ((k & 2)==0) {
				MCD_TRACE("got data delay=%d\n",
					RDELAY_WAITREAD-mbx->count,0,0,0);
				/* data is ready */
				addr	= bp->b_un.b_addr + mbx->skip;
				outb(port+mcd_ctl2,0x04);	/* XXX */
				for (i=0; i<mbx->sz; i++)
					*addr++	= inb(port+mcd_rdata);
				outb(port+mcd_ctl2,0x0c);	/* XXX */

				if (--mbx->nblk > 0) {
					mbx->skip += mbx->sz;
					goto nextblock;
				}

				/* return buffer */
				bp->b_resid = 0;
				biodone(bp);

				cd->flags &= ~MCDMBXBSY;
				mcd_start(mbx->unit);
				return;
			}
			if ((k & 4)==0)
				mcd_getstat(unit,0);
			timeout((timeout_func_t)mcd_doread,
				(caddr_t)MCD_S_WAITREAD,hz/100); /* XXX */
			return;
		} else {
#ifdef MCD_TO_WARNING_ON
			printf("mcd%d: timeout read data\n",unit);
#endif
			goto readerr;
		}
	}

readerr:
	if (mbx->retry-- > 0) {
#ifdef MCD_TO_WARNING_ON
		printf("mcd%d: retrying\n",unit);
#endif
		state = MCD_S_BEGIN1;
		goto loop;
	}

	/* invalidate the buffer */
	bp->b_flags |= B_ERROR;
	bp->b_resid = bp->b_bcount;
	biodone(bp);
	mcd_start(mbx->unit);
	return;

#ifdef NOTDEF
	printf("mcd%d: unit timeout, resetting\n",mbx->unit);
	outb(mbx->port+mcd_reset,MCD_CMDRESET);
	DELAY(300000);
	(void)mcd_getstat(mbx->unit,1);
	(void)mcd_getstat(mbx->unit,1);
	/*cd->status &= ~MCDDSKCHNG; */
	cd->debug = 1; /* preventive set debug mode */

#endif

}

#ifndef MCDMINI
static int
mcd_setmode(int unit, int mode)
{
	struct mcd_data *cd = mcd_data + unit;
	int port = cd->iobase;
	int retry;

	printf("mcd%d: setting mode to %d\n", unit, mode);
	for(retry=0; retry<MCD_RETRYS; retry++)
	{
		outb(port+mcd_command, MCD_CMDSETMODE);
		outb(port+mcd_command, mode);
		if (mcd_getstat(unit, 0) != -1) return 0;
	}

	return -1;
}

static int
mcd_toc_header(int unit, struct ioc_toc_header *th)
{
	struct mcd_data *cd = mcd_data + unit;

	if (mcd_volinfo(unit) < 0) {
		return ENXIO;
	}

	th->len = msf2hsg(cd->volinfo.vol_msf);
	th->starting_track = bcd2bin(cd->volinfo.trk_low);
	th->ending_track = bcd2bin(cd->volinfo.trk_high);

	return 0;
}

static int
mcd_read_toc(int unit)
{
	struct mcd_data *cd = mcd_data + unit;
	struct ioc_toc_header th;
	struct mcd_qchninfo q;
	int rc, trk, idx, retry;

	/* Only read TOC if needed */
	if (cd->flags & MCDTOC) {
		return 0;
	}

	printf("mcd%d: reading toc header\n", unit);
	if (mcd_toc_header(unit, &th) != 0) {
		return ENXIO;
	}

	printf("mcd%d: stopping play\n", unit);
	if ((rc=mcd_stop(unit)) != 0) {
		return rc;
	}

	/* try setting the mode twice */
	if (mcd_setmode(unit, MCD_MD_TOC) != 0) {
		return EIO;
	}
	if (mcd_setmode(unit, MCD_MD_TOC) != 0) {
		return EIO;
	}

	printf("mcd%d: get_toc reading qchannel info\n",unit);	
	for(trk=th.starting_track; trk<=th.ending_track; trk++)
		cd->toc[trk].idx_no = 0;
	trk = th.ending_track - th.starting_track + 1;
	for(retry=0; retry<300 && trk>0; retry++)
	{
		if (mcd_getqchan(unit, &q) < 0) break;
		idx = bcd2bin(q.idx_no);
		if (idx>0 && idx < MCD_MAXTOCS && q.trk_no==0) {
			if (cd->toc[idx].idx_no == 0) {
				cd->toc[idx] = q;
				trk--;
			}
		}
	}

	if (mcd_setmode(unit, MCD_MD_COOKED) != 0) {
		return EIO;
	}

	if (trk != 0) {
		return ENXIO;
	}

	/* add a fake last+1 */
	idx = th.ending_track + 1;
	cd->toc[idx].ctrl_adr = cd->toc[idx-1].ctrl_adr;
	cd->toc[idx].trk_no = 0;
	cd->toc[idx].idx_no = 0xAA;
	cd->toc[idx].hd_pos_msf[0] = cd->volinfo.vol_msf[0];
	cd->toc[idx].hd_pos_msf[1] = cd->volinfo.vol_msf[1];
	cd->toc[idx].hd_pos_msf[2] = cd->volinfo.vol_msf[2];

	cd->flags |= MCDTOC;

	return 0;
}

static int
mcd_toc_entry(int unit, struct ioc_read_toc_entry *te)
{
	struct mcd_data *cd = mcd_data + unit;
	struct ret_toc {
		struct ioc_toc_header th;
		struct cd_toc_entry rt;
	} ret_toc;
	struct ioc_toc_header th;
	int rc, i;

	/* Make sure we have a valid toc */
	if ((rc=mcd_read_toc(unit)) != 0) {
		return rc;
	}

	/* find the toc to copy*/
	i = te->starting_track;
	if (i == MCD_LASTPLUS1) {
		i = bcd2bin(cd->volinfo.trk_high) + 1;
	}
	
	/* verify starting track */
	if (i < bcd2bin(cd->volinfo.trk_low) ||
		i > bcd2bin(cd->volinfo.trk_high)+1) {
		return EINVAL;
	}

	/* do we have room */
	if (te->data_len < sizeof(struct ioc_toc_header) +
		sizeof(struct cd_toc_entry)) {
		return EINVAL;
	}

	/* Copy the toc header */
	if (mcd_toc_header(unit, &th) < 0) {
		return EIO;
	}
	ret_toc.th = th;

	/* copy the toc data */
	ret_toc.rt.control = cd->toc[i].ctrl_adr;
	ret_toc.rt.addr_type = te->address_format;
	ret_toc.rt.track = i;
	if (te->address_format == CD_MSF_FORMAT) {
		ret_toc.rt.addr.addr[1] = cd->toc[i].hd_pos_msf[0];
		ret_toc.rt.addr.addr[2] = cd->toc[i].hd_pos_msf[1];
		ret_toc.rt.addr.addr[3] = cd->toc[i].hd_pos_msf[2];
	}

	/* copy the data back */
	copyout(&ret_toc, te->data, sizeof(struct cd_toc_entry)
		+ sizeof(struct ioc_toc_header));

	return 0;
}

static int
mcd_stop(int unit)
{
	struct mcd_data *cd = mcd_data + unit;

	if (mcd_send(unit, MCD_CMDSTOPAUDIO, MCD_RETRYS) < 0) {
		return ENXIO;
	}
	cd->audio_status = CD_AS_PLAY_COMPLETED;
	return 0;
}

static int
mcd_getqchan(int unit, struct mcd_qchninfo *q)
{
	struct mcd_data *cd = mcd_data + unit;

	if (mcd_send(unit, MCD_CMDGETQCHN, MCD_RETRYS) < 0) {
		return -1;
	}
	if (mcd_get(unit, (char *) q, sizeof(struct mcd_qchninfo)) < 0) {
		return -1;
	}
	if (cd->debug) {
		printf("mcd%d: qchannel ctl=%d, t=%d, i=%d, ttm=%d:%d.%d dtm=%d:%d.%d\n",
		unit,
		q->ctrl_adr, q->trk_no, q->idx_no,
		q->trk_size_msf[0], q->trk_size_msf[1], q->trk_size_msf[2],
		q->trk_size_msf[0], q->trk_size_msf[1], q->trk_size_msf[2]);
	}
	return 0;
}

static int
mcd_subchan(int unit, struct ioc_read_subchannel *sc)
{
	struct mcd_data *cd = mcd_data + unit;
	struct mcd_qchninfo q;
	struct cd_sub_channel_info data;

	printf("mcd%d: subchan af=%d, df=%d\n", unit,
		sc->address_format,
		sc->data_format);
	if (sc->address_format != CD_MSF_FORMAT) {
		return EIO;
	}
	if (sc->data_format != CD_CURRENT_POSITION) {
		return EIO;
	}
	if (mcd_getqchan(unit, &q) < 0) {
		return EIO;
	}

	data.header.audio_status = cd->audio_status;
	data.what.position.data_format = CD_MSF_FORMAT;
	data.what.position.track_number = bcd2bin(q.trk_no);

	if (copyout(&data, sc->data, sizeof(struct cd_sub_channel_info))!=0) {
		return EFAULT;
	}
	return 0;
}

static int
mcd_playtracks(int unit, struct ioc_play_track *pt)
{
	struct mcd_data *cd = mcd_data + unit;
	struct mcd_read2 pb;
	int a = pt->start_track;
	int z = pt->end_track;
	int rc;

	if ((rc = mcd_read_toc(unit)) != 0) {
		return rc;
	}
	printf("mcd%d: playtracks from %d:%d to %d:%d\n", unit,
		a, pt->start_index, z, pt->end_index);

	if (a < cd->volinfo.trk_low || a > cd->volinfo.trk_high || a > z ||
	    z < cd->volinfo.trk_low || z > cd->volinfo.trk_high) {
		return EINVAL;
	}

	pb.start_msf[0] = cd->toc[a].hd_pos_msf[0];
	pb.start_msf[1] = cd->toc[a].hd_pos_msf[1];
	pb.start_msf[2] = cd->toc[a].hd_pos_msf[2];
	pb.end_msf[0] = cd->toc[z+1].hd_pos_msf[0];
	pb.end_msf[1] = cd->toc[z+1].hd_pos_msf[1];
	pb.end_msf[2] = cd->toc[z+1].hd_pos_msf[2];

	return mcd_play(unit, &pb);
}

static int
mcd_play(int unit, struct mcd_read2 *pb)
{
	struct mcd_data *cd = mcd_data + unit;
	int port = cd->iobase;
	int retry, st;

	cd->lastpb = *pb;
	for(retry=0; retry<MCD_RETRYS; retry++) {
		outb(port+mcd_command, MCD_CMDREAD2);
		outb(port+mcd_command, pb->start_msf[0]);
		outb(port+mcd_command, pb->start_msf[1]);
		outb(port+mcd_command, pb->start_msf[2]);
		outb(port+mcd_command, pb->end_msf[0]);
		outb(port+mcd_command, pb->end_msf[1]);
		outb(port+mcd_command, pb->end_msf[2]);
		if ((st=mcd_getstat(unit, 0)) != -1) {
			break;
		}
	}

	if (cd->debug) {
		printf("mcd%d: mcd_play retry=%d, status=%d\n", unit, retry, st);
	}
	if (st == -1) {
		return ENXIO;
	}
	cd->audio_status = CD_AS_PLAY_IN_PROGRESS;
	return 0;
}

static int
mcd_pause(int unit)
{
	struct mcd_data *cd = mcd_data + unit;
	struct mcd_qchninfo q;
	int rc;

	/* Verify current status */
	if (cd->audio_status != CD_AS_PLAY_IN_PROGRESS) {
		printf("mcd%d: pause attempted when not playing\n", unit);
		return EINVAL;
	}

	/* Get the current position */
	if (mcd_getqchan(unit, &q) < 0) {
		return EIO;
	}

	/* Copy it into lastpb */
	cd->lastpb.start_msf[0] = q.hd_pos_msf[0];
	cd->lastpb.start_msf[1] = q.hd_pos_msf[1];
	cd->lastpb.start_msf[2] = q.hd_pos_msf[2];

	/* Stop playing */
	if ((rc=mcd_stop(unit)) != 0) {
		return rc;
	}

	/* Set the proper status and exit */
	cd->audio_status = CD_AS_PLAY_PAUSED;
	return 0;
}

static int
mcd_resume(int unit)
{
	struct mcd_data *cd = mcd_data + unit;

	if (cd->audio_status != CD_AS_PLAY_PAUSED) {
		return EINVAL;
	}
	return mcd_play(unit, &cd->lastpb);
}
#endif /*!MCDMINI*/

#endif /* NMCD > 0 */
OpenPOWER on IntegriCloud