summaryrefslogtreecommitdiffstats
path: root/sound/oss/sb_common.c
blob: bbe5b7596d0e1167b321281da38a15ab70cde29d (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
/*
 * sound/oss/sb_common.c
 *
 * Common routines for Sound Blaster compatible cards.
 *
 *
 * Copyright (C) by Hannu Savolainen 1993-1997
 *
 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
 * Version 2 (June 1991). See the "COPYING" file distributed with this software
 * for more info.
 *
 *
 * Daniel J. Rodriksson: Modified sbintr to handle 8 and 16 bit interrupts
 *                       for full duplex support ( only sb16 by now )
 * Rolf Fokkens:	 Added (BETA?) support for ES1887 chips.
 * (fokkensr@vertis.nl)	 Which means: You can adjust the recording levels.
 *
 * 2000/01/18 - separated sb_card and sb_common -
 * Jeff Garzik <jgarzik@pobox.com>
 *
 * 2000/09/18 - got rid of attach_uart401
 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *
 * 2001/01/26 - replaced CLI/STI with spinlocks
 * Chris Rankin <rankinc@zipworld.com.au>
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/spinlock.h>

#include "sound_config.h"
#include "sound_firmware.h"

#include "mpu401.h"

#include "sb_mixer.h"
#include "sb.h"
#include "sb_ess.h"

/*
 * global module flag
 */

int sb_be_quiet;

static sb_devc *detected_devc;	/* For communication from probe to init */
static sb_devc *last_devc;	/* For MPU401 initialization */

static unsigned char jazz_irq_bits[] = {
	0, 0, 2, 3, 0, 1, 0, 4, 0, 2, 5, 0, 0, 0, 0, 6
};

static unsigned char jazz_dma_bits[] = {
	0, 1, 0, 2, 0, 3, 0, 4
};

void *smw_free;

/*
 * Jazz16 chipset specific control variables
 */

static int jazz16_base;			/* Not detected */
static unsigned char jazz16_bits;	/* I/O relocation bits */
static DEFINE_SPINLOCK(jazz16_lock);

/*
 * Logitech Soundman Wave specific initialization code
 */

#ifdef SMW_MIDI0001_INCLUDED
#include "smw-midi0001.h"
#else
static unsigned char *smw_ucode;
static int      smw_ucodeLen;

#endif

static sb_devc *last_sb;		/* Last sb loaded */

int sb_dsp_command(sb_devc * devc, unsigned char val)
{
	int i;
	unsigned long limit;

	limit = jiffies + HZ / 10;	/* Timeout */
	
	/*
	 * Note! the i<500000 is an emergency exit. The sb_dsp_command() is sometimes
	 * called while interrupts are disabled. This means that the timer is
	 * disabled also. However the timeout situation is a abnormal condition.
	 * Normally the DSP should be ready to accept commands after just couple of
	 * loops.
	 */

	for (i = 0; i < 500000 && (limit-jiffies)>0; i++)
	{
		if ((inb(DSP_STATUS) & 0x80) == 0)
		{
			outb((val), DSP_COMMAND);
			return 1;
		}
	}
	printk(KERN_WARNING "Sound Blaster:  DSP command(%x) timeout.\n", val);
	return 0;
}

int sb_dsp_get_byte(sb_devc * devc)
{
	int i;

	for (i = 1000; i; i--)
	{
		if (inb(DSP_DATA_AVAIL) & 0x80)
			return inb(DSP_READ);
	}
	return 0xffff;
}

static void sb_intr (sb_devc *devc)
{
	int status;
	unsigned char   src = 0xff;

	if (devc->model == MDL_SB16)
	{
		src = sb_getmixer(devc, IRQ_STAT);	/* Interrupt source register */

		if (src & 4)						/* MPU401 interrupt */
			if(devc->midi_irq_cookie)
				uart401intr(devc->irq, devc->midi_irq_cookie, NULL);

		if (!(src & 3))
			return;	/* Not a DSP interrupt */
	}
	if (devc->intr_active && (!devc->fullduplex || (src & 0x01)))
	{
		switch (devc->irq_mode)
		{
			case IMODE_OUTPUT:
				DMAbuf_outputintr(devc->dev, 1);
				break;

			case IMODE_INPUT:
				DMAbuf_inputintr(devc->dev);
				break;

			case IMODE_INIT:
				break;

			case IMODE_MIDI:
				sb_midi_interrupt(devc);
				break;

			default:
				/* printk(KERN_WARN "Sound Blaster: Unexpected interrupt\n"); */
				;
		}
	}
	else if (devc->intr_active_16 && (src & 0x02))
	{
		switch (devc->irq_mode_16)
		{
			case IMODE_OUTPUT:
				DMAbuf_outputintr(devc->dev, 1);
				break;

			case IMODE_INPUT:
				DMAbuf_inputintr(devc->dev);
				break;

			case IMODE_INIT:
				break;

			default:
				/* printk(KERN_WARN "Sound Blaster: Unexpected interrupt\n"); */
				;
		}
	}
	/*
	 * Acknowledge interrupts 
	 */

	if (src & 0x01)
		status = inb(DSP_DATA_AVAIL);

	if (devc->model == MDL_SB16 && src & 0x02)
		status = inb(DSP_DATA_AVL16);
}

static void pci_intr(sb_devc *devc)
{
	int src = inb(devc->pcibase+0x1A);
	src&=3;
	if(src)
		sb_intr(devc);
}

static irqreturn_t sbintr(int irq, void *dev_id, struct pt_regs *dummy)
{
	sb_devc *devc = dev_id;

	devc->irq_ok = 1;

	switch (devc->model) {
	case MDL_ESSPCI:
		pci_intr (devc);
		break;
		
	case MDL_ESS:
		ess_intr (devc);
		break;
	default:
		sb_intr (devc);
		break;
	}
	return IRQ_HANDLED;
}

int sb_dsp_reset(sb_devc * devc)
{
	int loopc;

	DEB(printk("Entered sb_dsp_reset()\n"));

	if (devc->model == MDL_ESS) return ess_dsp_reset (devc);

	/* This is only for non-ESS chips */

	outb(1, DSP_RESET);

	udelay(10);
	outb(0, DSP_RESET);
	udelay(30);

	for (loopc = 0; loopc < 1000 && !(inb(DSP_DATA_AVAIL) & 0x80); loopc++);

	if (inb(DSP_READ) != 0xAA)
	{
		DDB(printk("sb: No response to RESET\n"));
		return 0;	/* Sorry */
	}

	DEB(printk("sb_dsp_reset() OK\n"));

	return 1;
}

static void dsp_get_vers(sb_devc * devc)
{
	int i;

	unsigned long   flags;

	DDB(printk("Entered dsp_get_vers()\n"));
	spin_lock_irqsave(&devc->lock, flags);
	devc->major = devc->minor = 0;
	sb_dsp_command(devc, 0xe1);	/* Get version */

	for (i = 100000; i; i--)
	{
		if (inb(DSP_DATA_AVAIL) & 0x80)
		{
			if (devc->major == 0)
				devc->major = inb(DSP_READ);
			else
			{
				devc->minor = inb(DSP_READ);
				break;
			}
		}
	}
	spin_unlock_irqrestore(&devc->lock, flags);
	DDB(printk("DSP version %d.%02d\n", devc->major, devc->minor));
}

static int sb16_set_dma_hw(sb_devc * devc)
{
	int bits;

	if (devc->dma8 != 0 && devc->dma8 != 1 && devc->dma8 != 3)
	{
		printk(KERN_ERR "SB16: Invalid 8 bit DMA (%d)\n", devc->dma8);
		return 0;
	}
	bits = (1 << devc->dma8);

	if (devc->dma16 >= 5 && devc->dma16 <= 7)
		bits |= (1 << devc->dma16);

	sb_setmixer(devc, DMA_NR, bits);
	return 1;
}

static void sb16_set_mpu_port(sb_devc * devc, struct address_info *hw_config)
{
	/*
	 * This routine initializes new MIDI port setup register of SB Vibra (CT2502).
	 */
	unsigned char   bits = sb_getmixer(devc, 0x84) & ~0x06;

	switch (hw_config->io_base)
	{
		case 0x300:
			sb_setmixer(devc, 0x84, bits | 0x04);
			break;

		case 0x330:
			sb_setmixer(devc, 0x84, bits | 0x00);
			break;

		default:
			sb_setmixer(devc, 0x84, bits | 0x02);		/* Disable MPU */
			printk(KERN_ERR "SB16: Invalid MIDI I/O port %x\n", hw_config->io_base);
	}
}

static int sb16_set_irq_hw(sb_devc * devc, int level)
{
	int ival;

	switch (level)
	{
		case 5:
			ival = 2;
			break;
		case 7:
			ival = 4;
			break;
		case 9:
			ival = 1;
			break;
		case 10:
			ival = 8;
			break;
		default:
			printk(KERN_ERR "SB16: Invalid IRQ%d\n", level);
			return 0;
	}
	sb_setmixer(devc, IRQ_NR, ival);
	return 1;
}

static void relocate_Jazz16(sb_devc * devc, struct address_info *hw_config)
{
	unsigned char bits = 0;
	unsigned long flags;

	if (jazz16_base != 0 && jazz16_base != hw_config->io_base)
		return;

	switch (hw_config->io_base)
	{
		case 0x220:
			bits = 1;
			break;
		case 0x240:
			bits = 2;
			break;
		case 0x260:
			bits = 3;
			break;
		default:
			return;
	}
	bits = jazz16_bits = bits << 5;
	jazz16_base = hw_config->io_base;

	/*
	 *	Magic wake up sequence by writing to 0x201 (aka Joystick port)
	 */
	spin_lock_irqsave(&jazz16_lock, flags);
	outb((0xAF), 0x201);
	outb((0x50), 0x201);
	outb((bits), 0x201);
	spin_unlock_irqrestore(&jazz16_lock, flags);
}

static int init_Jazz16(sb_devc * devc, struct address_info *hw_config)
{
	char name[100];
	/*
	 * First try to check that the card has Jazz16 chip. It identifies itself
	 * by returning 0x12 as response to DSP command 0xfa.
	 */

	if (!sb_dsp_command(devc, 0xfa))
		return 0;

	if (sb_dsp_get_byte(devc) != 0x12)
		return 0;

	/*
	 * OK so far. Now configure the IRQ and DMA channel used by the card.
	 */
	if (hw_config->irq < 1 || hw_config->irq > 15 || jazz_irq_bits[hw_config->irq] == 0)
	{
		printk(KERN_ERR "Jazz16: Invalid interrupt (IRQ%d)\n", hw_config->irq);
		return 0;
	}
	if (hw_config->dma < 0 || hw_config->dma > 3 || jazz_dma_bits[hw_config->dma] == 0)
	{
		  printk(KERN_ERR "Jazz16: Invalid 8 bit DMA (DMA%d)\n", hw_config->dma);
		  return 0;
	}
	if (hw_config->dma2 < 0)
	{
		printk(KERN_ERR "Jazz16: No 16 bit DMA channel defined\n");
		return 0;
	}
	if (hw_config->dma2 < 5 || hw_config->dma2 > 7 || jazz_dma_bits[hw_config->dma2] == 0)
	{
		printk(KERN_ERR "Jazz16: Invalid 16 bit DMA (DMA%d)\n", hw_config->dma2);
		return 0;
	}
	devc->dma16 = hw_config->dma2;

	if (!sb_dsp_command(devc, 0xfb))
		return 0;

	if (!sb_dsp_command(devc, jazz_dma_bits[hw_config->dma] |
			(jazz_dma_bits[hw_config->dma2] << 4)))
		return 0;

	if (!sb_dsp_command(devc, jazz_irq_bits[hw_config->irq]))
		return 0;

	/*
	 * Now we have configured a standard Jazz16 device. 
	 */
	devc->model = MDL_JAZZ;
	strcpy(name, "Jazz16");

	hw_config->name = "Jazz16";
	devc->caps |= SB_NO_MIDI;
	return 1;
}

static void relocate_ess1688(sb_devc * devc)
{
	unsigned char bits;

	switch (devc->base)
	{
		case 0x220:
			bits = 0x04;
			break;
		case 0x230:
			bits = 0x05;
			break;
		case 0x240:
			bits = 0x06;
			break;
		case 0x250:
			bits = 0x07;
			break;
		default:
			return;	/* Wrong port */
	}

	DDB(printk("Doing ESS1688 address selection\n"));
	
	/*
	 * ES1688 supports two alternative ways for software address config.
	 * First try the so called Read-Sequence-Key method.
	 */

	/* Reset the sequence logic */
	inb(0x229);
	inb(0x229);
	inb(0x229);

	/* Perform the read sequence */
	inb(0x22b);
	inb(0x229);
	inb(0x22b);
	inb(0x229);
	inb(0x229);
	inb(0x22b);
	inb(0x229);

	/* Select the base address by reading from it. Then probe using the port. */
	inb(devc->base);
	if (sb_dsp_reset(devc))	/* Bingo */
		return;

#if 0				/* This causes system lockups (Nokia 386/25 at least) */
	/*
	 * The last resort is the system control register method.
	 */

	outb((0x00), 0xfb);	/* 0xFB is the unlock register */
	outb((0x00), 0xe0);	/* Select index 0 */
	outb((bits), 0xe1);	/* Write the config bits */
	outb((0x00), 0xf9);	/* 0xFB is the lock register */
#endif
}

int sb_dsp_detect(struct address_info *hw_config, int pci, int pciio, struct sb_module_options *sbmo)
{
	sb_devc sb_info;
	sb_devc *devc = &sb_info;

	memset((char *) &sb_info, 0, sizeof(sb_info));	/* Zero everything */

	/* Copy module options in place */
	if(sbmo) memcpy(&devc->sbmo, sbmo, sizeof(struct sb_module_options));

	sb_info.my_mididev = -1;
	sb_info.my_mixerdev = -1;
	sb_info.dev = -1;

	/*
	 * Initialize variables 
	 */
	
	DDB(printk("sb_dsp_detect(%x) entered\n", hw_config->io_base));

	spin_lock_init(&devc->lock);
	devc->type = hw_config->card_subtype;

	devc->base = hw_config->io_base;
	devc->irq = hw_config->irq;
	devc->dma8 = hw_config->dma;

	devc->dma16 = -1;
	devc->pcibase = pciio;
	
	if(pci == SB_PCI_ESSMAESTRO)
	{
		devc->model = MDL_ESSPCI;
		devc->caps |= SB_PCI_IRQ;
		hw_config->driver_use_1 |= SB_PCI_IRQ;
		hw_config->card_subtype	= MDL_ESSPCI;
	}
	
	if(pci == SB_PCI_YAMAHA)
	{
		devc->model = MDL_YMPCI;
		devc->caps |= SB_PCI_IRQ;
		hw_config->driver_use_1 |= SB_PCI_IRQ;
		hw_config->card_subtype	= MDL_YMPCI;
		
		printk("Yamaha PCI mode.\n");
	}
	
	if (devc->sbmo.acer)
	{
		unsigned long flags;

		spin_lock_irqsave(&devc->lock, flags);
		inb(devc->base + 0x09);
		inb(devc->base + 0x09);
		inb(devc->base + 0x09);
		inb(devc->base + 0x0b);
		inb(devc->base + 0x09);
		inb(devc->base + 0x0b);
		inb(devc->base + 0x09);
		inb(devc->base + 0x09);
		inb(devc->base + 0x0b);
		inb(devc->base + 0x09);
		inb(devc->base + 0x00);
		spin_unlock_irqrestore(&devc->lock, flags);
	}
	/*
	 * Detect the device
	 */

	if (sb_dsp_reset(devc))
		dsp_get_vers(devc);
	else
		devc->major = 0;

	if (devc->type == 0 || devc->type == MDL_JAZZ || devc->type == MDL_SMW)
		if (devc->major == 0 || (devc->major == 3 && devc->minor == 1))
			relocate_Jazz16(devc, hw_config);

	if (devc->major == 0 && (devc->type == MDL_ESS || devc->type == 0))
		relocate_ess1688(devc);

	if (!sb_dsp_reset(devc))
	{
		DDB(printk("SB reset failed\n"));
#ifdef MODULE
		printk(KERN_INFO "sb: dsp reset failed.\n");
#endif
		return 0;
	}
	if (devc->major == 0)
		dsp_get_vers(devc);

	if (devc->major == 3 && devc->minor == 1)
	{
		if (devc->type == MDL_AZTECH)		/* SG Washington? */
		{
			if (sb_dsp_command(devc, 0x09))
				if (sb_dsp_command(devc, 0x00))	/* Enter WSS mode */
				{
					int i;

					/* Have some delay */
					for (i = 0; i < 10000; i++)
						inb(DSP_DATA_AVAIL);
					devc->caps = SB_NO_AUDIO | SB_NO_MIDI;	/* Mixer only */
					devc->model = MDL_AZTECH;
				}
		}
	}
	
	if(devc->type == MDL_ESSPCI)
		devc->model = MDL_ESSPCI;
		
	if(devc->type == MDL_YMPCI)
	{
		printk("YMPCI selected\n");
		devc->model = MDL_YMPCI;
	}
		
	/*
	 * Save device information for sb_dsp_init()
	 */


	detected_devc = (sb_devc *)kmalloc(sizeof(sb_devc), GFP_KERNEL);
	if (detected_devc == NULL)
	{
		printk(KERN_ERR "sb: Can't allocate memory for device information\n");
		return 0;
	}
	memcpy(detected_devc, devc, sizeof(sb_devc));
	MDB(printk(KERN_INFO "SB %d.%02d detected OK (%x)\n", devc->major, devc->minor, hw_config->io_base));
	return 1;
}

int sb_dsp_init(struct address_info *hw_config, struct module *owner)
{
	sb_devc *devc;
	char name[100];
	extern int sb_be_quiet;
	int	mixer22, mixer30;
	
/*
 * Check if we had detected a SB device earlier
 */
	DDB(printk("sb_dsp_init(%x) entered\n", hw_config->io_base));
	name[0] = 0;

	if (detected_devc == NULL)
	{
		MDB(printk("No detected device\n"));
		return 0;
	}
	devc = detected_devc;
	detected_devc = NULL;

	if (devc->base != hw_config->io_base)
	{
		DDB(printk("I/O port mismatch\n"));
		release_region(devc->base, 16);
		return 0;
	}
	/*
	 * Now continue initialization of the device
	 */

	devc->caps = hw_config->driver_use_1;

	if (!((devc->caps & SB_NO_AUDIO) && (devc->caps & SB_NO_MIDI)) && hw_config->irq > 0)
	{			/* IRQ setup */
		
		/*
		 *	ESS PCI cards do shared PCI IRQ stuff. Since they
		 *	will get shared PCI irq lines we must cope.
		 */
		 
		int i=(devc->caps&SB_PCI_IRQ)?IRQF_SHARED:0;
		
		if (request_irq(hw_config->irq, sbintr, i, "soundblaster", devc) < 0)
		{
			printk(KERN_ERR "SB: Can't allocate IRQ%d\n", hw_config->irq);
			release_region(devc->base, 16);
			return 0;
		}
		devc->irq_ok = 0;

		if (devc->major == 4)
			if (!sb16_set_irq_hw(devc, devc->irq))	/* Unsupported IRQ */
			{
				free_irq(devc->irq, devc);
				release_region(devc->base, 16);
				return 0;
			}
		if ((devc->type == 0 || devc->type == MDL_ESS) &&
			devc->major == 3 && devc->minor == 1)
		{		/* Handle various chipsets which claim they are SB Pro compatible */
			if ((devc->type != 0 && devc->type != MDL_ESS) ||
				!ess_init(devc, hw_config))
			{
				if ((devc->type != 0 && devc->type != MDL_JAZZ &&
					 devc->type != MDL_SMW) || !init_Jazz16(devc, hw_config))
				{
					DDB(printk("This is a genuine SB Pro\n"));
				}
			}
		}
		if (devc->major == 4 && devc->minor <= 11 )	/* Won't work */
			devc->irq_ok = 1;
		else
		{
			int n;

			for (n = 0; n < 3 && devc->irq_ok == 0; n++)
			{
				if (sb_dsp_command(devc, 0xf2))	/* Cause interrupt immediately */
				{
					int i;

					for (i = 0; !devc->irq_ok && i < 10000; i++);
				}
			}
			if (!devc->irq_ok)
				printk(KERN_WARNING "sb: Interrupt test on IRQ%d failed - Probable IRQ conflict\n", devc->irq);
			else
			{
				DDB(printk("IRQ test OK (IRQ%d)\n", devc->irq));
			}
		}
	}			/* IRQ setup */

	last_sb = devc;
	
	switch (devc->major)
	{
		case 1:		/* SB 1.0 or 1.5 */
			devc->model = hw_config->card_subtype = MDL_SB1;
			break;

		case 2:		/* SB 2.x */
			if (devc->minor == 0)
				devc->model = hw_config->card_subtype = MDL_SB2;
			else
				devc->model = hw_config->card_subtype = MDL_SB201;
			break;

		case 3:		/* SB Pro and most clones */
			switch (devc->model) {
			case 0:
				devc->model = hw_config->card_subtype = MDL_SBPRO;
				if (hw_config->name == NULL)
					hw_config->name = "Sound Blaster Pro (8 BIT ONLY)";
				break;
			case MDL_ESS:
				ess_dsp_init(devc, hw_config);
				break;
			}
			break;

		case 4:
			devc->model = hw_config->card_subtype = MDL_SB16;
			/* 
			 * ALS007 and ALS100 return DSP version 4.2 and have 2 post-reset !=0
			 * registers at 0x3c and 0x4c (output ctrl registers on ALS007) whereas
			 * a "standard" SB16 doesn't have a register at 0x4c.  ALS100 actively
			 * updates register 0x22 whenever 0x30 changes, as per the SB16 spec.
			 * Since ALS007 doesn't, this can be used to differentiate the 2 cards.
			 */
			if ((devc->minor == 2) && sb_getmixer(devc,0x3c) && sb_getmixer(devc,0x4c)) 
			{
				mixer30 = sb_getmixer(devc,0x30);
				sb_setmixer(devc,0x22,(mixer22=sb_getmixer(devc,0x22)) & 0x0f);
				sb_setmixer(devc,0x30,0xff);
				/* ALS100 will force 0x30 to 0xf8 like SB16; ALS007 will allow 0xff. */
				/* Register 0x22 & 0xf0 on ALS100 == 0xf0; on ALS007 it == 0x10.     */
				if ((sb_getmixer(devc,0x30) != 0xff) || ((sb_getmixer(devc,0x22) & 0xf0) != 0x10)) 
				{
					devc->submodel = SUBMDL_ALS100;
					if (hw_config->name == NULL)
						hw_config->name = "Sound Blaster 16 (ALS-100)";
        			}
        			else
        			{
        				sb_setmixer(devc,0x3c,0x1f);    /* Enable all inputs */
					sb_setmixer(devc,0x4c,0x1f);
					sb_setmixer(devc,0x22,mixer22); /* Restore 0x22 to original value */
					devc->submodel = SUBMDL_ALS007;
					if (hw_config->name == NULL)
						hw_config->name = "Sound Blaster 16 (ALS-007)";
				}
				sb_setmixer(devc,0x30,mixer30);
			}
			else if (hw_config->name == NULL)
				hw_config->name = "Sound Blaster 16";

			if (hw_config->dma2 == -1)
				devc->dma16 = devc->dma8;
			else if (hw_config->dma2 < 5 || hw_config->dma2 > 7)
			{
				printk(KERN_WARNING  "SB16: Bad or missing 16 bit DMA channel\n");
				devc->dma16 = devc->dma8;
			}
			else
				devc->dma16 = hw_config->dma2;

			if(!sb16_set_dma_hw(devc)) {
				free_irq(devc->irq, devc);
			        release_region(hw_config->io_base, 16);
				return 0;
			}

			devc->caps |= SB_NO_MIDI;
	}

	if (!(devc->caps & SB_NO_MIXER))
		if (devc->major == 3 || devc->major == 4)
			sb_mixer_init(devc, owner);

	if (!(devc->caps & SB_NO_MIDI))
		sb_dsp_midi_init(devc, owner);

	if (hw_config->name == NULL)
		hw_config->name = "Sound Blaster (8 BIT/MONO ONLY)";

	sprintf(name, "%s (%d.%02d)", hw_config->name, devc->major, devc->minor);
	conf_printf(name, hw_config);

	/*
	 * Assuming that a sound card is Sound Blaster (compatible) is the most common
	 * configuration error and the mother of all problems. Usually sound cards
	 * emulate SB Pro but in addition they have a 16 bit native mode which should be
	 * used in Unix. See Readme.cards for more information about configuring OSS/Free
	 * properly.
	 */
	if (devc->model <= MDL_SBPRO)
	{
		if (devc->major == 3 && devc->minor != 1)	/* "True" SB Pro should have v3.1 (rare ones may have 3.2). */
		{
			printk(KERN_INFO "This sound card may not be fully Sound Blaster Pro compatible.\n");
			printk(KERN_INFO "In many cases there is another way to configure OSS so that\n");
			printk(KERN_INFO "it works properly with OSS (for example in 16 bit mode).\n");
			printk(KERN_INFO "Please ignore this message if you _really_ have a SB Pro.\n");
		}
		else if (!sb_be_quiet && devc->model == MDL_SBPRO)
		{
			printk(KERN_INFO "SB DSP version is just %d.%02d which means that your card is\n", devc->major, devc->minor);
			printk(KERN_INFO "several years old (8 bit only device) or alternatively the sound driver\n");
			printk(KERN_INFO "is incorrectly configured.\n");
		}
	}
	hw_config->card_subtype = devc->model;
	hw_config->slots[0]=devc->dev;
	last_devc = devc;	/* For SB MPU detection */

	if (!(devc->caps & SB_NO_AUDIO) && devc->dma8 >= 0)
	{
		if (sound_alloc_dma(devc->dma8, "SoundBlaster8"))
		{
			printk(KERN_WARNING "Sound Blaster: Can't allocate 8 bit DMA channel %d\n", devc->dma8);
		}
		if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
		{
			if (sound_alloc_dma(devc->dma16, "SoundBlaster16"))
				printk(KERN_WARNING "Sound Blaster:  can't allocate 16 bit DMA channel %d.\n", devc->dma16);
		}
		sb_audio_init(devc, name, owner);
		hw_config->slots[0]=devc->dev;
	}
	else
	{
		MDB(printk("Sound Blaster:  no audio devices found.\n"));
	}
	return 1;
}

/* if (sbmpu) below we allow mpu401 to manage the midi devs
   otherwise we have to unload them. (Andrzej Krzysztofowicz) */
   
void sb_dsp_unload(struct address_info *hw_config, int sbmpu)
{
	sb_devc *devc;

	devc = audio_devs[hw_config->slots[0]]->devc;

	if (devc && devc->base == hw_config->io_base)
	{
		if ((devc->model & MDL_ESS) && devc->pcibase)
			release_region(devc->pcibase, 8);

		release_region(devc->base, 16);

		if (!(devc->caps & SB_NO_AUDIO))
		{
			sound_free_dma(devc->dma8);
			if (devc->dma16 >= 0)
				sound_free_dma(devc->dma16);
		}
		if (!(devc->caps & SB_NO_AUDIO && devc->caps & SB_NO_MIDI))
		{
			if (devc->irq > 0)
				free_irq(devc->irq, devc);

			sb_mixer_unload(devc);
			/* We don't have to do this bit any more the UART401 is its own
				master  -- Krzysztof Halasa */
			/* But we have to do it, if UART401 is not detected */
			if (!sbmpu)
				sound_unload_mididev(devc->my_mididev);
			sound_unload_audiodev(devc->dev);
		}
		kfree(devc);
	}
	else
		release_region(hw_config->io_base, 16);

	kfree(detected_devc);
}

/*
 *	Mixer access routines
 *
 *	ES1887 modifications: some mixer registers reside in the
 *	range above 0xa0. These must be accessed in another way.
 */

void sb_setmixer(sb_devc * devc, unsigned int port, unsigned int value)
{
	unsigned long flags;

	if (devc->model == MDL_ESS) {
		ess_setmixer (devc, port, value);
		return;
	}

	spin_lock_irqsave(&devc->lock, flags);

	outb(((unsigned char) (port & 0xff)), MIXER_ADDR);
	udelay(20);
	outb(((unsigned char) (value & 0xff)), MIXER_DATA);
	udelay(20);

	spin_unlock_irqrestore(&devc->lock, flags);
}

unsigned int sb_getmixer(sb_devc * devc, unsigned int port)
{
	unsigned int val;
	unsigned long flags;

	if (devc->model == MDL_ESS) return ess_getmixer (devc, port);

	spin_lock_irqsave(&devc->lock, flags);

	outb(((unsigned char) (port & 0xff)), MIXER_ADDR);
	udelay(20);
	val = inb(MIXER_DATA);
	udelay(20);

	spin_unlock_irqrestore(&devc->lock, flags);

	return val;
}

void sb_chgmixer
	(sb_devc * devc, unsigned int reg, unsigned int mask, unsigned int val)
{
	int value;

	value = sb_getmixer(devc, reg);
	value = (value & ~mask) | (val & mask);
	sb_setmixer(devc, reg, value);
}

/*
 *	MPU401 MIDI initialization.
 */

static void smw_putmem(sb_devc * devc, int base, int addr, unsigned char val)
{
	unsigned long flags;

	spin_lock_irqsave(&jazz16_lock, flags);  /* NOT the SB card? */

	outb((addr & 0xff), base + 1);	/* Low address bits */
	outb((addr >> 8), base + 2);	/* High address bits */
	outb((val), base);	/* Data */

	spin_unlock_irqrestore(&jazz16_lock, flags);
}

static unsigned char smw_getmem(sb_devc * devc, int base, int addr)
{
	unsigned long flags;
	unsigned char val;

	spin_lock_irqsave(&jazz16_lock, flags);  /* NOT the SB card? */

	outb((addr & 0xff), base + 1);	/* Low address bits */
	outb((addr >> 8), base + 2);	/* High address bits */
	val = inb(base);	/* Data */

	spin_unlock_irqrestore(&jazz16_lock, flags);
	return val;
}

static int smw_midi_init(sb_devc * devc, struct address_info *hw_config)
{
	int mpu_base = hw_config->io_base;
	int mp_base = mpu_base + 4;		/* Microcontroller base */
	int i;
	unsigned char control;


	/*
	 *  Reset the microcontroller so that the RAM can be accessed
	 */

	control = inb(mpu_base + 7);
	outb((control | 3), mpu_base + 7);	/* Set last two bits to 1 (?) */
	outb(((control & 0xfe) | 2), mpu_base + 7);	/* xxxxxxx0 resets the mc */

	mdelay(3);	/* Wait at least 1ms */

	outb((control & 0xfc), mpu_base + 7);	/* xxxxxx00 enables RAM */

	/*
	 *  Detect microcontroller by probing the 8k RAM area
	 */
	smw_putmem(devc, mp_base, 0, 0x00);
	smw_putmem(devc, mp_base, 1, 0xff);
	udelay(10);

	if (smw_getmem(devc, mp_base, 0) != 0x00 || smw_getmem(devc, mp_base, 1) != 0xff)
	{
		DDB(printk("SM Wave: No microcontroller RAM detected (%02x, %02x)\n", smw_getmem(devc, mp_base, 0), smw_getmem(devc, mp_base, 1)));
		return 0;	/* No RAM */
	}
	/*
	 *  There is RAM so assume it's really a SM Wave
	 */

	devc->model = MDL_SMW;
	smw_mixer_init(devc);

#ifdef MODULE
	if (!smw_ucode)
	{
		smw_ucodeLen = mod_firmware_load("/etc/sound/midi0001.bin", (void *) &smw_ucode);
		smw_free = smw_ucode;
	}
#endif
	if (smw_ucodeLen > 0)
	{
		if (smw_ucodeLen != 8192)
		{
			printk(KERN_ERR "SM Wave: Invalid microcode (MIDI0001.BIN) length\n");
			return 1;
		}
		/*
		 *  Download microcode
		 */

		for (i = 0; i < 8192; i++)
			smw_putmem(devc, mp_base, i, smw_ucode[i]);

		/*
		 *  Verify microcode
		 */

		for (i = 0; i < 8192; i++)
			if (smw_getmem(devc, mp_base, i) != smw_ucode[i])
			{
				printk(KERN_ERR "SM Wave: Microcode verification failed\n");
				return 0;
			}
	}
	control = 0;
#ifdef SMW_SCSI_IRQ
	/*
	 * Set the SCSI interrupt (IRQ2/9, IRQ3 or IRQ10). The SCSI interrupt
	 * is disabled by default.
	 *
	 * FIXME - make this a module option
	 *
	 * BTW the Zilog 5380 SCSI controller is located at MPU base + 0x10.
	 */
	{
		static unsigned char scsi_irq_bits[] = {
			0, 0, 3, 1, 0, 0, 0, 0, 0, 3, 2, 0, 0, 0, 0, 0
		};
		control |= scsi_irq_bits[SMW_SCSI_IRQ] << 6;
	}
#endif

#ifdef SMW_OPL4_ENABLE
	/*
	 *  Make the OPL4 chip visible on the PC bus at 0x380.
	 *
	 *  There is no need to enable this feature since this driver
	 *  doesn't support OPL4 yet. Also there is no RAM in SM Wave so
	 *  enabling OPL4 is pretty useless.
	 */
	control |= 0x10;	/* Uses IRQ12 if bit 0x20 == 0 */
	/* control |= 0x20;      Uncomment this if you want to use IRQ7 */
#endif
	outb((control | 0x03), mpu_base + 7);	/* xxxxxx11 restarts */
	hw_config->name = "SoundMan Wave";
	return 1;
}

static int init_Jazz16_midi(sb_devc * devc, struct address_info *hw_config)
{
	int mpu_base = hw_config->io_base;
	int sb_base = devc->base;
	int irq = hw_config->irq;

	unsigned char bits = 0;
	unsigned long flags;

	if (irq < 0)
		irq *= -1;

	if (irq < 1 || irq > 15 ||
	    jazz_irq_bits[irq] == 0)
	{
		printk(KERN_ERR "Jazz16: Invalid MIDI interrupt (IRQ%d)\n", irq);
		return 0;
	}
	switch (sb_base)
	{
		case 0x220:
			bits = 1;
			break;
		case 0x240:
			bits = 2;
			break;
		case 0x260:
			bits = 3;
			break;
		default:
			return 0;
	}
	bits = jazz16_bits = bits << 5;
	switch (mpu_base)
	{
		case 0x310:
			bits |= 1;
			break;
		case 0x320:
			bits |= 2;
			break;
		case 0x330:
			bits |= 3;
			break;
		default:
			printk(KERN_ERR "Jazz16: Invalid MIDI I/O port %x\n", mpu_base);
			return 0;
	}
	/*
	 *	Magic wake up sequence by writing to 0x201 (aka Joystick port)
	 */
	spin_lock_irqsave(&jazz16_lock, flags);
	outb(0xAF, 0x201);
	outb(0x50, 0x201);
	outb(bits, 0x201);
	spin_unlock_irqrestore(&jazz16_lock, flags);

	hw_config->name = "Jazz16";
	smw_midi_init(devc, hw_config);

	if (!sb_dsp_command(devc, 0xfb))
		return 0;

	if (!sb_dsp_command(devc, jazz_dma_bits[devc->dma8] |
			    (jazz_dma_bits[devc->dma16] << 4)))
		return 0;

	if (!sb_dsp_command(devc, jazz_irq_bits[devc->irq] |
			    (jazz_irq_bits[irq] << 4)))
		return 0;

	return 1;
}

int probe_sbmpu(struct address_info *hw_config, struct module *owner)
{
	sb_devc *devc = last_devc;
	int ret;

	if (last_devc == NULL)
		return 0;

	last_devc = NULL;

	if (hw_config->io_base <= 0)
	{
		/* The real vibra16 is fine about this, but we have to go
		   wipe up after Cyrix again */
		   	   
		if(devc->model == MDL_SB16 && devc->minor >= 12)
		{
			unsigned char   bits = sb_getmixer(devc, 0x84) & ~0x06;
			sb_setmixer(devc, 0x84, bits | 0x02);		/* Disable MPU */
		}
		return 0;
	}

#if defined(CONFIG_SOUND_MPU401)
	if (devc->model == MDL_ESS)
	{
		struct resource *ports;
		ports = request_region(hw_config->io_base, 2, "mpu401");
		if (!ports) {
			printk(KERN_ERR "sbmpu: I/O port conflict (%x)\n", hw_config->io_base);
			return 0;
		}
		if (!ess_midi_init(devc, hw_config)) {
			release_region(hw_config->io_base, 2);
			return 0;
		}
		hw_config->name = "ESS1xxx MPU";
		devc->midi_irq_cookie = NULL;
		if (!probe_mpu401(hw_config, ports)) {
			release_region(hw_config->io_base, 2);
			return 0;
		}
		attach_mpu401(hw_config, owner);
		if (last_sb->irq == -hw_config->irq)
			last_sb->midi_irq_cookie=(void *)hw_config->slots[1];
		return 1;
	}
#endif

	switch (devc->model)
	{
		case MDL_SB16:
			if (hw_config->io_base != 0x300 && hw_config->io_base != 0x330)
			{
				printk(KERN_ERR "SB16: Invalid MIDI port %x\n", hw_config->io_base);
				return 0;
			}
			hw_config->name = "Sound Blaster 16";
			if (hw_config->irq < 3 || hw_config->irq == devc->irq)
				hw_config->irq = -devc->irq;
			if (devc->minor > 12)		/* What is Vibra's version??? */
				sb16_set_mpu_port(devc, hw_config);
			break;

		case MDL_JAZZ:
			if (hw_config->irq < 3 || hw_config->irq == devc->irq)
				hw_config->irq = -devc->irq;
			if (!init_Jazz16_midi(devc, hw_config))
				return 0;
			break;

		case MDL_YMPCI:
			hw_config->name = "Yamaha PCI Legacy";
			printk("Yamaha PCI legacy UART401 check.\n");
			break;
		default:
			return 0;
	}
	
	ret = probe_uart401(hw_config, owner);
	if (ret)
		last_sb->midi_irq_cookie=midi_devs[hw_config->slots[4]]->devc;
	return ret;
}

void unload_sbmpu(struct address_info *hw_config)
{
#if defined(CONFIG_SOUND_MPU401)
	if (!strcmp (hw_config->name, "ESS1xxx MPU")) {
		unload_mpu401(hw_config);
		return;
	}
#endif
	unload_uart401(hw_config);
}

EXPORT_SYMBOL(sb_dsp_init);
EXPORT_SYMBOL(sb_dsp_detect);
EXPORT_SYMBOL(sb_dsp_unload);
EXPORT_SYMBOL(sb_be_quiet);
EXPORT_SYMBOL(probe_sbmpu);
EXPORT_SYMBOL(unload_sbmpu);
EXPORT_SYMBOL(smw_free);
MODULE_LICENSE("GPL");