summaryrefslogtreecommitdiffstats
path: root/sound/oss/mad16.c
blob: 954647f41dff4730fcc774f35b04f56c667cf764 (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
/*
 * Copyright (C) by Hannu Savolainen 1993-1997
 *
 * mad16.c
 *
 * Initialization code for OPTi MAD16 compatible audio chips. Including
 *
 *      OPTi 82C928     MAD16           (replaced by C929)
 *      OAK OTI-601D    Mozart
 *      OAK OTI-605	Mozart		(later version with MPU401 Midi)
 *      OPTi 82C929     MAD16 Pro
 *      OPTi 82C930
 *      OPTi 82C924
 *
 * These audio interface chips don't produce sound themselves. They just
 * connect some other components (OPL-[234] and a WSS compatible codec)
 * to the PC bus and perform I/O, DMA and IRQ address decoding. There is
 * also a UART for the MPU-401 mode (not 82C928/Mozart).
 * The Mozart chip appears to be compatible with the 82C928, although later
 * issues of the card, using the OTI-605 chip, have an MPU-401 compatible Midi
 * port. This port is configured differently to that of the OPTi audio chips.
 *
 *	Changes
 *	
 *	Alan Cox		Clean up, added module selections.
 *
 *	A. Wik			Added support for Opti924 PnP.
 *				Improved debugging support.	16-May-1998
 *				Fixed bug.			16-Jun-1998
 *
 *      Torsten Duwe            Made Opti924 PnP support non-destructive
 *                                                             	23-Dec-1998
 *
 *	Paul Grayson		Added support for Midi on later Mozart cards.
 *								25-Nov-1999
 *	Christoph Hellwig	Adapted to module_init/module_exit.
 *	Arnaldo C. de Melo	got rid of attach_uart401       21-Sep-2000
 *
 *	Pavel Rabel		Clean up                           Nov-2000
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/gameport.h>
#include <linux/spinlock.h>
#include "sound_config.h"

#include "ad1848.h"
#include "sb.h"
#include "mpu401.h"

#if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
#define SUPPORT_JOYSTICK 1
#endif

static int      mad16_conf;
static int      mad16_cdsel;
static DEFINE_SPINLOCK(lock);

#define C928	1
#define MOZART	2
#define C929	3
#define C930	4
#define C924    5

/*
 *    Registers
 *
 *      The MAD16 occupies I/O ports 0xf8d to 0xf93 (fixed locations).
 *      All ports are inactive by default. They can be activated by
 *      writing 0xE2 or 0xE3 to the password register. The password is valid
 *      only until the next I/O read or write.
 *
 *      82C930 uses 0xE4 as the password and indirect addressing to access
 *      the config registers.
 */

#define MC0_PORT	0xf8c	/* Dummy port */
#define MC1_PORT	0xf8d	/* SB address, CD-ROM interface type, joystick */
#define MC2_PORT	0xf8e	/* CD-ROM address, IRQ, DMA, plus OPL4 bit */
#define MC3_PORT	0xf8f
#define PASSWD_REG	0xf8f
#define MC4_PORT	0xf90
#define MC5_PORT	0xf91
#define MC6_PORT	0xf92
#define MC7_PORT	0xf93
#define MC8_PORT	0xf94
#define MC9_PORT	0xf95
#define MC10_PORT	0xf96
#define MC11_PORT	0xf97
#define MC12_PORT	0xf98

static int      board_type = C928;

static int     *mad16_osp;
static int	c931_detected;	/* minor differences from C930 */
static char	c924pnp;	/* "     "           "    C924 */
static int	debug;  	/* debugging output */

#ifdef DDB
#undef DDB
#endif
#define DDB(x) do {if (debug) x;} while (0)

static unsigned char mad_read(int port)
{
	unsigned long flags;
	unsigned char tmp;

	spin_lock_irqsave(&lock,flags);

	switch (board_type)	/* Output password */
	{
		case C928:
		case MOZART:
			outb((0xE2), PASSWD_REG);
			break;

		case C929:
			outb((0xE3), PASSWD_REG);
			break;

		case C930:
			/* outb(( 0xE4),  PASSWD_REG); */
			break;

		case C924:
			/* the c924 has its ports relocated by -128 if
			   PnP is enabled  -aw */
			if (!c924pnp)
				outb((0xE5), PASSWD_REG); else
				outb((0xE5), PASSWD_REG - 0x80);
			break;
	}

	if (board_type == C930)
	{
		outb((port - MC0_PORT), 0xe0e);	/* Write to index reg */
		tmp = inb(0xe0f);	/* Read from data reg */
	}
	else
		if (!c924pnp)
			tmp = inb(port); else
			tmp = inb(port-0x80);
	spin_unlock_irqrestore(&lock,flags);

	return tmp;
}

static void mad_write(int port, int value)
{
	unsigned long   flags;

	spin_lock_irqsave(&lock,flags);

	switch (board_type)	/* Output password */
	{
		case C928:
		case MOZART:
			outb((0xE2), PASSWD_REG);
			break;

		case C929:
			outb((0xE3), PASSWD_REG);
			break;

		case C930:
			/* outb(( 0xE4),  PASSWD_REG); */
			break;

		case C924:
			if (!c924pnp)
				outb((0xE5), PASSWD_REG); else
				outb((0xE5), PASSWD_REG - 0x80);
			break;
	}

	if (board_type == C930)
	{
		outb((port - MC0_PORT), 0xe0e);	/* Write to index reg */
		outb(((unsigned char) (value & 0xff)), 0xe0f);
	}
	else
		if (!c924pnp)
			outb(((unsigned char) (value & 0xff)), port); else
			outb(((unsigned char) (value & 0xff)), port-0x80);
	spin_unlock_irqrestore(&lock,flags);
}

static int __init detect_c930(void)
{
	unsigned char   tmp = mad_read(MC1_PORT);

	if ((tmp & 0x06) != 0x06)
	{
		DDB(printk("Wrong C930 signature (%x)\n", tmp));
		/* return 0; */
	}
	mad_write(MC1_PORT, 0);

	if (mad_read(MC1_PORT) != 0x06)
	{
		DDB(printk("Wrong C930 signature2 (%x)\n", tmp));
		/* return 0; */
	}
	mad_write(MC1_PORT, tmp);	/* Restore bits */

	mad_write(MC7_PORT, 0);
	if ((tmp = mad_read(MC7_PORT)) != 0)
	{
		DDB(printk("MC7 not writable (%x)\n", tmp));
		return 0;
	}
	mad_write(MC7_PORT, 0xcb);
	if ((tmp = mad_read(MC7_PORT)) != 0xcb)
	{
		DDB(printk("MC7 not writable2 (%x)\n", tmp));
		return 0;
	}

	tmp = mad_read(MC0_PORT+18);
	if (tmp == 0xff || tmp == 0x00)
		return 1;
	/* We probably have a C931 */
	DDB(printk("Detected C931 config=0x%02x\n", tmp));
	c931_detected = 1;

	/*
         * We cannot configure the chip if it is in PnP mode.
         * If we have a CSN assigned (bit 8 in MC13) we first try
         * a software reset, then a software power off, finally
         * Clearing PnP mode. The last option is not
	 * Bit 8 in MC13 
         */
	if ((mad_read(MC0_PORT+13) & 0x80) == 0)
		return 1;

	/* Software reset */
	mad_write(MC9_PORT, 0x02);
	mad_write(MC9_PORT, 0x00);

	if ((mad_read(MC0_PORT+13) & 0x80) == 0)
		return 1;
	
	/* Power off, and on again */
	mad_write(MC9_PORT, 0xc2);
	mad_write(MC9_PORT, 0xc0);

	if ((mad_read(MC0_PORT+13) & 0x80) == 0)
		return 1;
	
#if 0	
	/* Force off PnP mode. This is not recommended because
	 * the PnP bios will not recognize the chip on the next
	 * warm boot and may assignd different resources to other
	 * PnP/PCI cards.
	 */
	mad_write(MC0_PORT+17, 0x04);
#endif
	return 1;
}

static int __init detect_mad16(void)
{
	unsigned char tmp, tmp2, bit;
	int i, port;

	/*
	 * Check that reading a register doesn't return bus float (0xff)
	 * when the card is accessed using password. This may fail in case
	 * the card is in low power mode. Normally at least the power saving
	 * mode bit should be 0.
	 */

	if ((tmp = mad_read(MC1_PORT)) == 0xff)
	{
		DDB(printk("MC1_PORT returned 0xff\n"));
		return 0;
	}
	for (i = 0xf8d; i <= 0xf98; i++)
		if (!c924pnp)
			DDB(printk("Port %0x (init value) = %0x\n", i, mad_read(i)));
		else
			DDB(printk("Port %0x (init value) = %0x\n", i-0x80, mad_read(i)));

	if (board_type == C930)
		return detect_c930();

	/*
	 * Now check that the gate is closed on first I/O after writing
	 * the password. (This is how a MAD16 compatible card works).
	 */

	if ((tmp2 = inb(MC1_PORT)) == tmp)	/* It didn't close */
	{
		DDB(printk("MC1_PORT didn't close after read (0x%02x)\n", tmp2));
		return 0;
	}

	bit  = (c924pnp) ?     0x20 : 0x80;
	port = (c924pnp) ? MC2_PORT : MC1_PORT;

	tmp = mad_read(port);
	mad_write(port, tmp ^ bit);	/* Toggle a bit */
	if ((tmp2 = mad_read(port)) != (tmp ^ bit))	/* Compare the bit */
	{
		mad_write(port, tmp);	/* Restore */
		DDB(printk("Bit revert test failed (0x%02x, 0x%02x)\n", tmp, tmp2));
		return 0;
	}
	mad_write(port, tmp);	/* Restore */
	return 1;		/* Bingo */
}

static int __init wss_init(struct address_info *hw_config)
{
	/*
	 * Check if the IO port returns valid signature. The original MS Sound
	 * system returns 0x04 while some cards (AudioTrix Pro for example)
	 * return 0x00.
	 */

	if ((inb(hw_config->io_base + 3) & 0x3f) != 0x04 &&
	    (inb(hw_config->io_base + 3) & 0x3f) != 0x00)
	{
		DDB(printk("No MSS signature detected on port 0x%x (0x%x)\n", hw_config->io_base, inb(hw_config->io_base + 3)));
		return 0;
	}
	/*
	 * Check that DMA0 is not in use with a 8 bit board.
	 */
	if (hw_config->dma == 0 && inb(hw_config->io_base + 3) & 0x80)
	{
		printk("MSS: Can't use DMA0 with a 8 bit card/slot\n");
		return 0;
	}
	if (hw_config->irq > 9 && inb(hw_config->io_base + 3) & 0x80)
		printk(KERN_ERR "MSS: Can't use IRQ%d with a 8 bit card/slot\n", hw_config->irq);
	return 1;
}

static void __init init_c930(struct address_info *hw_config, int base)
{
	unsigned char cfg = 0;

	cfg |= (0x0f & mad16_conf);

	if(c931_detected)
	{
		/* Bit 0 has reversd meaning. Bits 1 and 2 sese
		   reversed on write.
		   Support only IDE cdrom. IDE port programmed
		   somewhere else. */
		cfg =  (cfg & 0x09) ^ 0x07;
	}
	cfg |= base << 4;
	mad_write(MC1_PORT, cfg);

	/* MC2 is CD configuration. Don't touch it. */

	mad_write(MC3_PORT, 0);	/* Disable SB mode IRQ and DMA */

	/* bit 2 of MC4 reverses it's meaning between the C930
	   and the C931. */
	cfg = c931_detected ? 0x04 : 0x00;

	if(mad16_cdsel & 0x20)
		mad_write(MC4_PORT, 0x62|cfg);  /* opl4 */
	else
		mad_write(MC4_PORT, 0x52|cfg);  /* opl3 */

	mad_write(MC5_PORT, 0x3C);	/* Init it into mode2 */
	mad_write(MC6_PORT, 0x02);	/* Enable WSS, Disable MPU and SB */
	mad_write(MC7_PORT, 0xCB);
	mad_write(MC10_PORT, 0x11);
}

static int __init chip_detect(void)
{
	int i;

	/*
	 *    Then try to detect with the old password
	 */
	board_type = C924;

	DDB(printk("Detect using password = 0xE5\n"));
	
	if (detect_mad16()) {
		return 1;
	}
	
	board_type = C928;

	DDB(printk("Detect using password = 0xE2\n"));

	if (detect_mad16())
	{
		unsigned char model;

		if (((model = mad_read(MC3_PORT)) & 0x03) == 0x03) {
			DDB(printk("mad16.c: Mozart detected\n"));
			board_type = MOZART;
		} else {
			DDB(printk("mad16.c: 82C928 detected???\n"));
			board_type = C928;
		}
		return 1;
	}

	board_type = C929;

	DDB(printk("Detect using password = 0xE3\n"));

	if (detect_mad16())
	{
		DDB(printk("mad16.c: 82C929 detected\n"));
		return 1;
	}

	if (inb(PASSWD_REG) != 0xff)
		return 0;

	/*
	 * First relocate MC# registers to 0xe0e/0xe0f, disable password 
	 */

	outb((0xE4), PASSWD_REG);
	outb((0x80), PASSWD_REG);

	board_type = C930;

	DDB(printk("Detect using password = 0xE4\n"));

	for (i = 0xf8d; i <= 0xf93; i++)
		DDB(printk("port %03x = %02x\n", i, mad_read(i)));

        if(detect_mad16()) {
		DDB(printk("mad16.c: 82C930 detected\n"));
		return 1;
	}

	/* The C931 has the password reg at F8D */
	outb((0xE4), 0xF8D);
	outb((0x80), 0xF8D);
	DDB(printk("Detect using password = 0xE4 for C931\n"));

	if (detect_mad16()) {
		return 1;
	}

	board_type = C924;
	c924pnp++;
	DDB(printk("Detect using password = 0xE5 (again), port offset -0x80\n"));
	if (detect_mad16()) {
		DDB(printk("mad16.c: 82C924 PnP detected\n"));
		return 1;
	}
	
	c924pnp=0;

	return 0;
}

static int __init probe_mad16(struct address_info *hw_config)
{
	int i;
	unsigned char tmp;
	unsigned char cs4231_mode = 0;

	int ad_flags = 0;

	signed char bits;

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

	int config_port = hw_config->io_base + 0, version_port = hw_config->io_base + 3;
	int dma = hw_config->dma, dma2 = hw_config->dma2;
	unsigned char dma2_bit = 0;
	int base;
	struct resource *ports;

	mad16_osp = hw_config->osp;

	switch (hw_config->io_base) {
	case 0x530:
		base = 0;
		break;
	case 0xe80:
		base = 1;
		break;
	case 0xf40:
		base = 2;
		break;
	case 0x604:
		base = 3;
		break;
	default:
		printk(KERN_ERR "MAD16/Mozart: Bad WSS base address 0x%x\n", hw_config->io_base);
		return 0;
	}

	if (dma != 0 && dma != 1 && dma != 3) {
		printk(KERN_ERR "MSS: Bad DMA %d\n", dma);
		return 0;
	}

	/*
	 *    Check that all ports return 0xff (bus float) when no password
	 *      is written to the password register.
	 */

	DDB(printk("--- Detecting MAD16 / Mozart ---\n"));
	if (!chip_detect())
		return 0;

	switch (hw_config->irq) {
	case 7:
		bits = 8;
		break;
	case 9:
		bits = 0x10;
		break;
	case 10:
		bits = 0x18;
		break;
	case 12:
		bits = 0x20;
		break;
	case 5:	/* Also IRQ5 is possible on C930 */
		if (board_type == C930 || c924pnp) {
			bits = 0x28;
			break;
		}
	default:
		printk(KERN_ERR "MAD16/Mozart: Bad IRQ %d\n", hw_config->irq);
		return 0;
	}

	ports = request_region(hw_config->io_base + 4, 4, "ad1848");
	if (!ports) {
		printk(KERN_ERR "MSS: I/O port conflict\n");
		return 0;
	}
	if (!request_region(hw_config->io_base, 4, "mad16 WSS config")) {
		release_region(hw_config->io_base + 4, 4);
		printk(KERN_ERR "MSS: I/O port conflict\n");
		return 0;
	}

	if (board_type == C930) {
		init_c930(hw_config, base);
		goto got_it;
	}

	for (i = 0xf8d; i <= 0xf93; i++) {
		if (!c924pnp)
			DDB(printk("port %03x = %02x\n", i, mad_read(i)));
		else
			DDB(printk("port %03x = %02x\n", i-0x80, mad_read(i)));
	}

/*
 * Set the WSS address
 */

	tmp = (mad_read(MC1_PORT) & 0x0f) | 0x80;	/* Enable WSS, Disable SB */
	tmp |= base << 4;	/* WSS port select bits */

	/*
	 * Set optional CD-ROM and joystick settings.
	 */

	tmp &= ~0x0f;
	tmp |= (mad16_conf & 0x0f);	/* CD-ROM and joystick bits */
	mad_write(MC1_PORT, tmp);

	tmp = mad16_cdsel;
	mad_write(MC2_PORT, tmp);
	mad_write(MC3_PORT, 0xf0);	/* Disable SB */

	if (board_type == C924)	/* Specific C924 init values */
	{
		mad_write(MC4_PORT, 0xA0);
		mad_write(MC5_PORT, 0x05);
		mad_write(MC6_PORT, 0x03);
	}
	if (!ad1848_detect(ports, &ad_flags, mad16_osp))
		goto fail;

	if (ad_flags & (AD_F_CS4231 | AD_F_CS4248))
		cs4231_mode = 0x02;	/* CS4248/CS4231 sync delay switch */

	if (board_type == C929)
	{
		mad_write(MC4_PORT, 0xa2);
		mad_write(MC5_PORT, 0xA5 | cs4231_mode);
		mad_write(MC6_PORT, 0x03);	/* Disable MPU401 */
	}
	else
	{
		mad_write(MC4_PORT, 0x02);
		mad_write(MC5_PORT, 0x30 | cs4231_mode);
	}

	for (i = 0xf8d; i <= 0xf93; i++) {
		if (!c924pnp)
			DDB(printk("port %03x after init = %02x\n", i, mad_read(i)));
		else
			DDB(printk("port %03x after init = %02x\n", i-0x80, mad_read(i)));
	}

got_it:
	ad_flags = 0;
	if (!ad1848_detect(ports, &ad_flags, mad16_osp))
		goto fail;

	if (!wss_init(hw_config))
		goto fail;

	/*
	 * Set the IRQ and DMA addresses.
	 */
	
	outb((bits | 0x40), config_port);
	if ((inb(version_port) & 0x40) == 0)
		printk(KERN_ERR "[IRQ Conflict?]\n");

	/*
	 * Handle the capture DMA channel
	 */

	if (ad_flags & AD_F_CS4231 && dma2 != -1 && dma2 != dma)
	{
		if (!((dma == 0 && dma2 == 1) ||
			(dma == 1 && dma2 == 0) ||
			(dma == 3 && dma2 == 0)))
		{		/* Unsupported combination. Try to swap channels */
			int tmp = dma;

			dma = dma2;
			dma2 = tmp;
		}
		if ((dma == 0 && dma2 == 1) || (dma == 1 && dma2 == 0) ||
			(dma == 3 && dma2 == 0))
		{
			dma2_bit = 0x04;	/* Enable capture DMA */
		}
		else
		{
			printk("MAD16: Invalid capture DMA\n");
			dma2 = dma;
		}
	}
	else dma2 = dma;

	outb((bits | dma_bits[dma] | dma2_bit), config_port);	/* Write IRQ+DMA setup */

	hw_config->slots[0] = ad1848_init("mad16 WSS", ports,
					  hw_config->irq,
					  dma,
					  dma2, 0,
					  hw_config->osp,
					  THIS_MODULE);
	return 1;

fail:
	release_region(hw_config->io_base + 4, 4);
	release_region(hw_config->io_base, 4);
	return 0;
}

static int __init probe_mad16_mpu(struct address_info *hw_config)
{
	unsigned char tmp;

	if (board_type < C929)	/* Early chip. No MPU support. Just SB MIDI */
	{

#ifdef CONFIG_MAD16_OLDCARD

		tmp = mad_read(MC3_PORT);

		/* 
		 * MAD16 SB base is defined by the WSS base. It cannot be changed 
		 * alone.
		 * Ignore configured I/O base. Use the active setting. 
		 */

		if (mad_read(MC1_PORT) & 0x20)
			hw_config->io_base = 0x240;
		else
			hw_config->io_base = 0x220;

		switch (hw_config->irq)
		{
			case 5:
				tmp = (tmp & 0x3f) | 0x80;
				break;
			case 7:
				tmp = (tmp & 0x3f);
				break;
			case 11:
				tmp = (tmp & 0x3f) | 0x40;
				break;
			default:
				printk(KERN_ERR "mad16/Mozart: Invalid MIDI IRQ\n");
				return 0;
		}

		mad_write(MC3_PORT, tmp | 0x04);
		hw_config->driver_use_1 = SB_MIDI_ONLY;
		if (!request_region(hw_config->io_base, 16, "soundblaster"))
			return 0;
		if (!sb_dsp_detect(hw_config, 0, 0, NULL)) {
			release_region(hw_config->io_base, 16);
			return 0;
		}

		if (mad_read(MC1_PORT) & 0x20)
			hw_config->io_base = 0x240;
		else
			hw_config->io_base = 0x220;

		hw_config->name = "Mad16/Mozart";
		sb_dsp_init(hw_config, THIS_MODULE);
		return 1;
#else
		/* assuming all later Mozart cards are identified as
		 * either 82C928 or Mozart. If so, following code attempts
		 * to set MPU register. TODO - add probing
		 */

		tmp = mad_read(MC8_PORT);

		switch (hw_config->irq)
		{
			case 5:
				tmp |= 0x08;
				break;
			case 7:
				tmp |= 0x10;
				break;
			case 9:
				tmp |= 0x18;
				break;
			case 10:
				tmp |= 0x20;
				break;
			case 11:
				tmp |= 0x28;
				break;
			default:
				printk(KERN_ERR "mad16/MOZART: invalid mpu_irq\n");
				return 0;
		}

		switch (hw_config->io_base)
		{
			case 0x300:
				tmp |= 0x01;
				break;
			case 0x310:
				tmp |= 0x03;
				break;
			case 0x320:
				tmp |= 0x05;
				break;
			case 0x330:
				tmp |= 0x07;
				break;
			default:
				printk(KERN_ERR "mad16/MOZART: invalid mpu_io\n");
				return 0;
		}

		mad_write(MC8_PORT, tmp);	/* write MPU port parameters */
		goto probe_401;
#endif
	}
	tmp = mad_read(MC6_PORT) & 0x83;
	tmp |= 0x80;		/* MPU-401 enable */

	/* Set the MPU base bits */

	switch (hw_config->io_base)
	{
		case 0x300:
			tmp |= 0x60;
			break;
		case 0x310:
			tmp |= 0x40;
			break;
		case 0x320:
			tmp |= 0x20;
			break;
		case 0x330:
			tmp |= 0x00;
			break;
		default:
			printk(KERN_ERR "MAD16: Invalid MIDI port 0x%x\n", hw_config->io_base);
			return 0;
	}

	/* Set the MPU IRQ bits */

	switch (hw_config->irq)
	{
		case 5:
			tmp |= 0x10;
			break;
		case 7:
			tmp |= 0x18;
			break;
		case 9:
			tmp |= 0x00;
			break;
		case 10:
			tmp |= 0x08;
			break;
		default:
			printk(KERN_ERR "MAD16: Invalid MIDI IRQ %d\n", hw_config->irq);
			break;
	}
			
	mad_write(MC6_PORT, tmp);	/* Write MPU401 config */

#ifndef CONFIG_MAD16_OLDCARD
probe_401:
#endif
	hw_config->driver_use_1 = SB_MIDI_ONLY;
	hw_config->name = "Mad16/Mozart";
	return probe_uart401(hw_config, THIS_MODULE);
}

static void __exit unload_mad16(struct address_info *hw_config)
{
	ad1848_unload(hw_config->io_base + 4,
			hw_config->irq,
			hw_config->dma,
			hw_config->dma2, 0);
	release_region(hw_config->io_base, 4);
	sound_unload_audiodev(hw_config->slots[0]);
}

static void __exit unload_mad16_mpu(struct address_info *hw_config)
{
#ifdef CONFIG_MAD16_OLDCARD
	if (board_type < C929)	/* Early chip. No MPU support. Just SB MIDI */
	{
		sb_dsp_unload(hw_config, 0);
		return;
	}
#endif

	unload_uart401(hw_config);
}

static struct address_info cfg;
static struct address_info cfg_mpu;

static int found_mpu;

static int __initdata mpu_io = 0;
static int __initdata mpu_irq = 0;
static int __initdata io = -1;
static int __initdata dma = -1;
static int __initdata dma16 = -1; /* Set this for modules that need it */
static int __initdata irq = -1;
static int __initdata cdtype = 0;
static int __initdata cdirq = 0;
static int __initdata cdport = 0x340;
static int __initdata cddma = -1;
static int __initdata opl4 = 0;
static int __initdata joystick = 0;

module_param(mpu_io, int, 0);
module_param(mpu_irq, int, 0);
module_param(io, int, 0);
module_param(dma, int, 0);
module_param(dma16, int, 0);
module_param(irq, int, 0);
module_param(cdtype, int, 0);
module_param(cdirq, int, 0);
module_param(cdport, int, 0);
module_param(cddma, int, 0);
module_param(opl4, int, 0);
module_param(joystick, bool, 0);
module_param(debug, bool, 0644);

static int __initdata dma_map[2][8] =
{
	{0x03, -1, -1, -1, -1, 0x00, 0x01, 0x02},
	{0x03, -1, 0x01, 0x00, -1, -1, -1, -1}
};

static int __initdata irq_map[16] =
{
	0x00, -1, -1, 0x0A,
	-1, 0x04, -1, 0x08,
	-1, 0x10, 0x14, 0x18,
	-1, -1, -1, -1
};

#ifdef SUPPORT_JOYSTICK

static struct gameport *gameport;

static int __devinit mad16_register_gameport(int io_port)
{
	if (!request_region(io_port, 1, "mad16 gameport")) {
		printk(KERN_ERR "mad16: gameport address 0x%#x already in use\n", io_port);
		return -EBUSY;
	}

	gameport = gameport_allocate_port();
	if (!gameport) {
		printk(KERN_ERR "mad16: can not allocate memory for gameport\n");
		release_region(io_port, 1);
		return -ENOMEM;
	}

	gameport_set_name(gameport, "MAD16 Gameport");
	gameport_set_phys(gameport, "isa%04x/gameport0", io_port);
	gameport->io = io_port;

	gameport_register_port(gameport);

	return 0;
}

static inline void mad16_unregister_gameport(void)
{
	if (gameport) {
		/* the gameport was initialized so we must free it up */
		gameport_unregister_port(gameport);
		gameport = NULL;
		release_region(0x201, 1);
	}
}
#else
static inline int mad16_register_gameport(int io_port) { return -ENOSYS; }
static inline void mad16_unregister_gameport(void) { }
#endif

static int __devinit init_mad16(void)
{
	int dmatype = 0;

	printk(KERN_INFO "MAD16 audio driver Copyright (C) by Hannu Savolainen 1993-1996\n");

	printk(KERN_INFO "CDROM ");
	switch (cdtype)
	{
		case 0x00:
			printk("Disabled");
			cdirq = 0;
			break;
		case 0x02:
			printk("Sony CDU31A");
			dmatype = 1;
			if(cddma == -1) cddma = 3;
			break;
		case 0x04:
			printk("Mitsumi");
			dmatype = 0;
			if(cddma == -1) cddma = 5;
			break;
		case 0x06:
			printk("Panasonic Lasermate");
			dmatype = 1;
			if(cddma == -1) cddma = 3;
			break;
		case 0x08:
			printk("Secondary IDE");
			dmatype = 0;
			if(cddma == -1) cddma = 5;
			break;
		case 0x0A:
			printk("Primary IDE");
			dmatype = 0;
			if(cddma == -1) cddma = 5;
			break;
		default:
			printk("\n");
			printk(KERN_ERR "Invalid CDROM type\n");
			return -EINVAL;
	}

	/*
	 *    Build the config words
	 */

	mad16_conf = (joystick ^ 1) | cdtype;
	mad16_cdsel = 0;
	if (opl4)
		mad16_cdsel |= 0x20;

	if(cdtype){
		if (cddma > 7 || cddma < 0 || dma_map[dmatype][cddma] == -1)
		{
			printk("\n");
			printk(KERN_ERR "Invalid CDROM DMA\n");
			return -EINVAL;
		}
		if (cddma)
			printk(", DMA %d", cddma);
		else
			printk(", no DMA");

		if (!cdirq)
			printk(", no IRQ");
		else if (cdirq < 0 || cdirq > 15 || irq_map[cdirq] == -1)
		{
			printk(", invalid IRQ (disabling)");
			cdirq = 0;
		}
		else printk(", IRQ %d", cdirq);

		mad16_cdsel |= dma_map[dmatype][cddma];

		if (cdtype < 0x08)
		{
			switch (cdport)
			{
				case 0x340:
					mad16_cdsel |= 0x00;
					break;
				case 0x330:
					mad16_cdsel |= 0x40;
					break;
				case 0x360:
					mad16_cdsel |= 0x80;
					break;
				case 0x320:
					mad16_cdsel |= 0xC0;
					break;
				default:
					printk(KERN_ERR "Unknown CDROM I/O base %d\n", cdport);
					return -EINVAL;
			}
		}
		mad16_cdsel |= irq_map[cdirq];
	}

	printk(".\n");

	cfg.io_base = io;
	cfg.irq = irq;
	cfg.dma = dma;
	cfg.dma2 = dma16;

	if (cfg.io_base == -1 || cfg.dma == -1 || cfg.irq == -1) {
		printk(KERN_ERR "I/O, DMA and irq are mandatory\n");
		return -EINVAL;
	}

	if (!request_region(MC0_PORT, 12, "mad16"))
		return -EBUSY;

	if (!probe_mad16(&cfg)) {
		release_region(MC0_PORT, 12);
		return -ENODEV;
	}

	cfg_mpu.io_base = mpu_io;
	cfg_mpu.irq = mpu_irq;

	found_mpu = probe_mad16_mpu(&cfg_mpu);

	if (joystick)
		mad16_register_gameport(0x201);

	return 0;
}

static void __exit cleanup_mad16(void)
{
	if (found_mpu)
		unload_mad16_mpu(&cfg_mpu);
	mad16_unregister_gameport();
	unload_mad16(&cfg);
	release_region(MC0_PORT, 12);
}

module_init(init_mad16);
module_exit(cleanup_mad16);

#ifndef MODULE
static int __init setup_mad16(char *str)
{
	/* io, irq */
	int ints[8];

	str = get_options(str, ARRAY_SIZE(ints), ints);

	io	 = ints[1];
	irq	 = ints[2];
	dma	 = ints[3];
	dma16	 = ints[4];
	mpu_io	 = ints[5];
	mpu_irq  = ints[6];
	joystick = ints[7];

	return 1;
}

__setup("mad16=", setup_mad16);
#endif
MODULE_LICENSE("GPL");