Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
   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
/*
 * 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 compatable 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/config.h>
#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"

static int      mad16_conf;
static int      mad16_cdsel;
static struct gameport gameport;
static spinlock_t lock=SPIN_LOCK_UNLOCKED;
static int      already_initialized = 0;

#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 = 0;	/* "     "           "    C924 */
static int	debug = 0;	/* debugging output */

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

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)
{
	int ad_flags = 0;

	/*
	 *    Verify the WSS parameters
	 */

	if (check_region(hw_config->io_base, 8))
	{
		printk(KERN_ERR "MSS: I/O port conflict\n");
		return 0;
	}
	if (!ad1848_detect(hw_config->io_base + 4, &ad_flags, mad16_osp))
		return 0;
	/*
	 * 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;
	}
	if (hw_config->irq > 11)
	{
		printk(KERN_ERR "MSS: Bad IRQ %d\n", hw_config->irq);
		return 0;
	}
	if (hw_config->dma != 0 && hw_config->dma != 1 && hw_config->dma != 3)
	{
		printk(KERN_ERR "MSS: Bad DMA %d\n", hw_config->dma);
		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 > 7 && 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 int __init init_c930(struct address_info *hw_config)
{
	unsigned char cfg = 0;

	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;
	}

	switch (hw_config->io_base)
	{
		case 0x530:
			cfg |= 0x00;
			break;
		case 0xe80:
			cfg |= 0x10;
			break;
		case 0xf40:
			cfg |= 0x20;
			break;
		case 0x604:
			cfg |= 0x30;
			break;
		default:
			printk(KERN_ERR "MAD16: Invalid codec port %x\n", hw_config->io_base);
			return 0;
	}
	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;

	mad_write(MC4_PORT, 0x52|cfg);

	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);

	return wss_init(hw_config);
}

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;
	static int valid_ports[] = 
	{
		0x530, 0xe80, 0xf40, 0x604
	};
	unsigned char tmp;
	unsigned char cs4231_mode = 0;

	int ad_flags = 0;

	if (already_initialized)
		return 0;

	mad16_osp = hw_config->osp;

	/*
	 *    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;

	if (board_type == C930)
		return init_c930(hw_config);


	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 */

	for (i = 0; i < 5; i++)
	{
		if (i > 3)	/* Not a valid port */
		{
			printk(KERN_ERR "MAD16/Mozart: Bad WSS base address 0x%x\n", hw_config->io_base);
			return 0;
		}
		if (valid_ports[i] == hw_config->io_base)
		{
			tmp |= i << 4;	/* WSS port select bits */
			break;
		}
	}

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

	tmp &= ~0x0f;
	mad_write(MC1_PORT, tmp);

	tmp = mad_read(MC2_PORT);

	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(hw_config->io_base + 4, &ad_flags, mad16_osp))
		return 0;

	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)));
	wss_init(hw_config);

	return 1;
}

static void __init attach_mad16(struct address_info *hw_config)
{

	static signed char     interrupt_bits[12] = {
		-1, -1, -1, -1, -1, -1, -1, 0x08, -1, 0x10, 0x18, 0x20
	};
	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 ad_flags = 0, dma = hw_config->dma, dma2 = hw_config->dma2;
	unsigned char dma2_bit = 0;

	already_initialized = 1;

	if (!ad1848_detect(hw_config->io_base + 4, &ad_flags, mad16_osp))
		return;

	/*
	 * Set the IRQ and DMA addresses.
	 */
	
	if (board_type == C930 || c924pnp)
		interrupt_bits[5] = 0x28;	/* Also IRQ5 is possible on C930 */

	bits = interrupt_bits[hw_config->irq];
	if (bits == -1)
		return;

	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", hw_config->io_base + 4,
					  hw_config->irq,
					  dma,
					  dma2, 0,
					  hw_config->osp,
					  THIS_MODULE);
	request_region(hw_config->io_base, 4, "mad16 WSS config");
}

static int __init probe_mad16_mpu(struct address_info *hw_config)
{
	static int mpu_attached = 0;
	unsigned char tmp;

	if (!already_initialized)	/* The MSS port must be initialized first */
		return 0;

	if (mpu_attached)		/* Don't let them call this twice */
		return 0;
	mpu_attached = 1;

	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 (!sb_dsp_detect(hw_config, 0, 0, NULL))
			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 = 1;

MODULE_PARM(mpu_io, "i");
MODULE_PARM(mpu_irq, "i");
MODULE_PARM(io,"i");
MODULE_PARM(dma,"i");
MODULE_PARM(dma16,"i");
MODULE_PARM(irq,"i");
MODULE_PARM(cdtype,"i");
MODULE_PARM(cdirq,"i");
MODULE_PARM(cdport,"i");
MODULE_PARM(cddma,"i");
MODULE_PARM(opl4,"i");
MODULE_PARM(joystick,"i");
MODULE_PARM(debug,"i");

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
};

static int __init 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 (!probe_mad16(&cfg))
		return -ENODEV;

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

	attach_mad16(&cfg);

	found_mpu = probe_mad16_mpu(&cfg_mpu);

	if (joystick == 1) {
	        /* register gameport */
                if (!request_region(0x201, 1, "mad16 gameport"))
                        printk(KERN_ERR "mad16: gameport address 0x201 already in use\n");
                else {
			printk(KERN_ERR "mad16: gameport enabled at 0x201\n");
                        gameport.io = 0x201;
		        gameport_register_port(&gameport);
                }
	}
	else printk(KERN_ERR "mad16: gameport disabled.\n");
	return 0;
}

static void __exit cleanup_mad16(void)
{
	if (found_mpu)
		unload_mad16_mpu(&cfg_mpu);
	unload_mad16(&cfg);
}

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");