aboutsummaryrefslogtreecommitdiffstats
path: root/sound/oss/aci.c
blob: 3928c2802cc43bd974d3865631e533cc607636cc (plain) (blame)
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
/*
 * Audio Command Interface (ACI) driver (sound/aci.c)
 *
 * ACI is a protocol used to communicate with the microcontroller on
 * some sound cards produced by miro, e.g. the miroSOUND PCM12 and
 * PCM20. The ACI has been developed for miro by Norberto Pellicci
 * <pellicci@home.com>. Special thanks to both him and miro for
 * providing the ACI specification.
 *
 * The main function of the ACI is to control the mixer and to get a
 * product identification. On the PCM20, ACI also controls the radio
 * tuner on this card, this is supported in the Video for Linux 
 * miropcm20 driver.
 * -
 * This is a fullfeatured implementation. Unsupported features
 * are bugs... (:
 *
 * It is not longer necessary to load the mad16 module first. The
 * user is currently responsible to set the mad16 mixer correctly.
 *
 * To toggle the solo mode for full duplex operation just use the OSS
 * record switch for the pcm ('wave') controller.           Robert
 * -
 *
 * Revision history:
 *
 *   1995-11-10  Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de>
 *        First version written.
 *   1995-12-31  Markus Kuhn
 *        Second revision, general code cleanup.
 *   1996-05-16	 Hannu Savolainen
 *	  Integrated with other parts of the driver.
 *   1996-05-28  Markus Kuhn
 *        Initialize CS4231A mixer, make ACI first mixer,
 *        use new private mixer API for solo mode.
 *   1998-08-18  Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl>
 *	  Small modification to export ACI functions and 
 *	  complete modularisation.
 *   2000-06-20  Robert Siemer <Robert.Siemer@gmx.de>
 *        Don't initialize the CS4231A mixer anymore, so the code is
 *        working again, and other small changes to fit in todays
 *        kernels.
 *   2000-08-26  Robert Siemer
 *        Clean up and rewrite for 2.4.x. Maybe it's SMP safe now... (:
 *        ioctl bugfix, and integration of solo-mode into OSS-API,
 *        added (OSS-limited) equalizer support, return value bugfix,
 *        changed param aci_reset to reset, new params: ide, wss.
 *   2001-04-20  Robert Siemer
 *        even more cleanups...
 *   2001-10-08  Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *   	  Get rid of check_region, .bss optimizations, use set_current_state
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h> 
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <asm/semaphore.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include "sound_config.h"

int aci_port;	/* as determined by bit 4 in the OPTi 929 MC4 register */
static int aci_idcode[2];	/* manufacturer and product ID */
int aci_version;	/* ACI firmware version	*/

EXPORT_SYMBOL(aci_port);
EXPORT_SYMBOL(aci_version);

#include "aci.h"


static int aci_solo;	/* status bit of the card that can't be		*
			 * checked with ACI versions prior to 0xb0	*/
static int aci_amp;   /* status bit for power-amp/line-out level
			   but I have no docs about what is what... */
static int aci_micpreamp=3; /* microphone preamp-level that can't be    *
			 * checked with ACI versions prior to 0xb0	*/

static int mixer_device;
static struct semaphore aci_sem;

#ifdef MODULE
static int reset;
module_param(reset, bool, 0);
MODULE_PARM_DESC(reset,"When set to 1, reset aci mixer.");
#else
static int reset = 1;
#endif

static int ide=-1;
module_param(ide, int, 0);
MODULE_PARM_DESC(ide,"1 enable, 0 disable ide-port - untested"
		 " default: do nothing");
static int wss=-1;
module_param(wss, int, 0);
MODULE_PARM_DESC(wss,"change between ACI/WSS-mixer; use 0 and 1 - untested"
		 " default: do nothing; for PCM1-pro only");

#ifdef DEBUG
static void print_bits(unsigned char c)
{
	int j;
	printk(KERN_DEBUG "aci: ");

	for (j=7; j>=0; j--) {
		printk("%d", (c >> j) & 0x1);
	}

	printk("\n");
}
#endif

/*
 * This busy wait code normally requires less than 15 loops and
 * practically always less than 100 loops on my i486/DX2 66 MHz.
 *
 * Warning: Waiting on the general status flag after reseting the MUTE
 * function can take a VERY long time, because the PCM12 does some kind
 * of fade-in effect. For this reason, access to the MUTE function has
 * not been implemented at all.
 *
 * - The OSS interface has no mute option. It takes about 3 seconds to
 * fade-in on my PCM20. busy_wait() handles it great now...     Robert
 */

static int busy_wait(void)
{
	#define MINTIME 500
	long timeout;
	unsigned char byte;

	for (timeout = 1; timeout <= MINTIME+30; timeout++) {
		if (((byte=inb(BUSY_REGISTER)) & 1) == 0) {
			if (timeout >= MINTIME)
				printk(KERN_DEBUG "aci: Got READYFLAG in round %ld.\n", timeout-MINTIME);
			return byte;
		}
		if (timeout >= MINTIME) {
			long out=10*HZ;
			switch (timeout-MINTIME) {
			case 0 ... 9:
				out /= 10;
			case 10 ... 19:
				out /= 10;
			case 20 ... 30:
				out /= 10;
			default:
				set_current_state(TASK_UNINTERRUPTIBLE);
				schedule_timeout(out);
				break;
			}
		}
	}
	printk(KERN_WARNING "aci: busy_wait() time out.\n");
	return -EBUSY;
}

/* The four ACI command types are fucked up. [-:
 * implied is: 1w      - special case for INIT
 * write   is: 2w1r
 * read    is: x(1w1r) where x is 1 or 2 (1 CHECK_SIG, 1 CHECK_STER,
 *                                        1 VERSION, 2 IDCODE)
 *  the command is only in the first write, rest is protocol overhead
 *
 * indexed is technically a write and used for STATUS
 * and the special case for TUNE is: 3w1r
 * 
 * Here the new general sheme: TUNE --> aci_rw_cmd(x,  y,  z)
 *                indexed and write --> aci_rw_cmd(x,  y, -1)
 *           implied and read (x=1) --> aci_rw_cmd(x, -1, -1)
 *
 * Read (x>=2) is not implemented (only used during initialization).
 * Use aci_idcode[2] and aci_version...                    Robert
 */

/* Some notes for error detection: theoretically it is possible.
 * But it doubles the I/O-traffic from ww(r) to wwwrw(r) in the normal 
 * case and doesn't seem to be designed for that...        Robert
 */

static inline int aci_rawwrite(unsigned char byte)
{
	if (busy_wait() >= 0) {
#ifdef DEBUG
		printk(KERN_DEBUG "aci_rawwrite(%d)\n", byte);
#endif
		outb(byte, COMMAND_REGISTER);
		return 0;
	} else
		return -EBUSY;
}

static inline int aci_rawread(void)
{
	unsigned char byte;

	if (busy_wait() >= 0) {
		byte=inb(STATUS_REGISTER);
#ifdef DEBUG
		printk(KERN_DEBUG "%d = aci_rawread()\n", byte);
#endif
		return byte;
	} else
		return -EBUSY;
}


int aci_rw_cmd(int write1, int write2, int write3)
{
	int write[] = {write1, write2, write3};
	int read = -EINTR, i;

	if (down_interruptible(&aci_sem))
		goto out;

	for (i=0; i<3; i++) {
		if (write[i]< 0 || write[i] > 255)
			break;
		else {
			read = aci_rawwrite(write[i]);
			if (read < 0)
				goto out_up;
		}
		
	}
	
	read = aci_rawread();
out_up:	up(&aci_sem);
out:	return read;
}

EXPORT_SYMBOL(aci_rw_cmd);

static int setvolume(int __user *arg, 
		     unsigned char left_index, unsigned char right_index)
{
	int vol, ret, uservol, buf;

	__get_user(uservol, arg);

	/* left channel */
	vol = uservol & 0xff;
	if (vol > 100)
		vol = 100;
	vol = SCALE(100, 0x20, vol);
	if ((buf=aci_write_cmd(left_index, 0x20 - vol))<0)
		return buf;
	ret = SCALE(0x20, 100, vol);


	/* right channel */
	vol = (uservol >> 8) & 0xff;
	if (vol > 100)
		vol = 100;
	vol = SCALE(100, 0x20, vol);
	if ((buf=aci_write_cmd(right_index, 0x20 - vol))<0)
		return buf;
	ret |= SCALE(0x20, 100, vol) << 8;
 
	__put_user(ret, arg);

	return 0;
}

static int getvolume(int __user *arg,
		     unsigned char left_index, unsigned char right_index)
{
	int vol;
	int buf;

	/* left channel */
	if ((buf=aci_indexed_cmd(ACI_STATUS, left_index))<0)
		return buf;
	vol = SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0);
	
	/* right channel */
	if ((buf=aci_indexed_cmd(ACI_STATUS, right_index))<0)
		return buf;
	vol |= SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0) << 8;

	__put_user(vol, arg);

	return 0;
}


/* The equalizer is somewhat strange on the ACI. From -12dB to +12dB
 * write:  0xff..down.to..0x80==0x00..up.to..0x7f
 */

static inline unsigned int eq_oss2aci(unsigned int vol)
{
	int boost=0;
	unsigned int ret;

	if (vol > 100)
		vol = 100;
	if (vol > 50) {
		vol -= 51;
		boost=1;
	}
	if (boost)
		ret=SCALE(49, 0x7e, vol)+1;
	else
		ret=0xff - SCALE(50, 0x7f, vol);
	return ret;
}

static inline unsigned int eq_aci2oss(unsigned int vol)
{
	if (vol < 0x80)
		return SCALE(0x7f, 50, vol) + 50;
	else
		return SCALE(0x7f, 50, 0xff-vol);
}


static int setequalizer(int __user *arg, 
			unsigned char left_index, unsigned char right_index)
{
	int buf;
	unsigned int vol;

	__get_user(vol, arg);

	/* left channel */
	if ((buf=aci_write_cmd(left_index, eq_oss2aci(vol & 0xff)))<0)
		return buf;

	/* right channel */
	if ((buf=aci_write_cmd(right_index, eq_oss2aci((vol>>8) & 0xff)))<0)
		return buf;

	/* the ACI equalizer is more precise */
	return 0;
}

static int getequalizer(int __user *arg,
			unsigned char left_index, unsigned char right_index)
{
	int buf;
	unsigned int vol;

	/* left channel */
	if ((buf=aci_indexed_cmd(ACI_STATUS, left_index))<0)
		return buf;
	vol = eq_aci2oss(buf);
	
	/* right channel */
	if ((buf=aci_indexed_cmd(ACI_STATUS, right_index))<0)
		return buf;
	vol |= eq_aci2oss(buf) << 8;

	__put_user(vol, arg);

	return 0;
}

static int aci_mixer_ioctl (int dev, unsigned int cmd, void __user * arg)
{
	int vol, buf;
	int __user *p = arg;

	switch (cmd) {
	case SOUND_MIXER_WRITE_VOLUME:
		return setvolume(p, 0x01, 0x00);
	case SOUND_MIXER_WRITE_CD:
		return setvolume(p, 0x3c, 0x34);
	case SOUND_MIXER_WRITE_MIC:
		return setvolume(p, 0x38, 0x30);
	case SOUND_MIXER_WRITE_LINE:
		return setvolume(p, 0x39, 0x31);
	case SOUND_MIXER_WRITE_SYNTH:
		return setvolume(p, 0x3b, 0x33);
	case SOUND_MIXER_WRITE_PCM:
		return setvolume(p, 0x3a, 0x32);
	case MIXER_WRITE(SOUND_MIXER_RADIO): /* fall through */
	case SOUND_MIXER_WRITE_LINE1:  /* AUX1 or radio */
		return setvolume(p, 0x3d, 0x35);
	case SOUND_MIXER_WRITE_LINE2:  /* AUX2 */
		return setvolume(p, 0x3e, 0x36);
	case SOUND_MIXER_WRITE_BASS:   /* set band one and two */
		if (aci_idcode[1]=='C') {
			if ((buf=setequalizer(p, 0x48, 0x40)) || 
			    (buf=setequalizer(p, 0x49, 0x41)));
			return buf;
		}
		break;
	case SOUND_MIXER_WRITE_TREBLE: /* set band six and seven */
		if (aci_idcode[1]=='C') {
			if ((buf=setequalizer(p, 0x4d, 0x45)) || 
			    (buf=setequalizer(p, 0x4e, 0x46)));
			return buf;
		}
		break;
	case SOUND_MIXER_WRITE_IGAIN:  /* MIC pre-amp */
		if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
			__get_user(vol, p);
			vol = vol & 0xff;
			if (vol > 100)
				vol = 100;
			vol = SCALE(100, 3, vol);
			if ((buf=aci_write_cmd(ACI_WRITE_IGAIN, vol))<0)
				return buf;
			aci_micpreamp = vol;
			vol = SCALE(3, 100, vol);
			vol |= (vol << 8);
			__put_user(vol, p);
			return 0;
		}
		break;
	case SOUND_MIXER_WRITE_OGAIN:  /* Power-amp/line-out level */
		if (aci_idcode[1]=='A' || aci_idcode[1]=='B') {
			__get_user(buf, p);
			buf = buf & 0xff;
			if (buf > 50)
				vol = 1;
			else
				vol = 0;
			if ((buf=aci_write_cmd(ACI_SET_POWERAMP, vol))<0)
				return buf;
			aci_amp = vol;
			if (aci_amp)
				buf = (100 || 100<<8);
			else
				buf = 0;
			__put_user(buf, p);
			return 0;
		}
		break;
	case SOUND_MIXER_WRITE_RECSRC:
		/* handle solo mode control */
		__get_user(buf, p);
		/* unset solo when RECSRC for PCM is requested */
		if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
			vol = !(buf & SOUND_MASK_PCM);
			if ((buf=aci_write_cmd(ACI_SET_SOLOMODE, vol))<0)
				return buf;
			aci_solo = vol;
		}
		buf = (SOUND_MASK_CD| SOUND_MASK_MIC| SOUND_MASK_LINE|
		       SOUND_MASK_SYNTH| SOUND_MASK_LINE2);
		if (aci_idcode[1] == 'C') /* PCM20 radio */
			buf |= SOUND_MASK_RADIO;
		else
			buf |= SOUND_MASK_LINE1;
		if (!aci_solo)
			buf |= SOUND_MASK_PCM;
		__put_user(buf, p);
		return 0;
	case SOUND_MIXER_READ_DEVMASK:
		buf = (SOUND_MASK_VOLUME | SOUND_MASK_CD    |
		       SOUND_MASK_MIC    | SOUND_MASK_LINE  |
		       SOUND_MASK_SYNTH  | SOUND_MASK_PCM   |
		       SOUND_MASK_LINE2);
		switch (aci_idcode[1]) {
		case 'C': /* PCM20 radio */
			buf |= (SOUND_MASK_RADIO | SOUND_MASK_IGAIN |
				SOUND_MASK_BASS  | SOUND_MASK_TREBLE);
			break;
		case 'B': /* PCM12 */
			buf |= (SOUND_MASK_LINE1 | SOUND_MASK_IGAIN |
				SOUND_MASK_OGAIN);
			break;
		case 'A': /* PCM1-pro */
			buf |= (SOUND_MASK_LINE1 | SOUND_MASK_OGAIN);
			break;
		default:
			buf |= SOUND_MASK_LINE1;
		}
		__put_user(buf, p);
		return 0;
	case SOUND_MIXER_READ_STEREODEVS:
		buf = (SOUND_MASK_VOLUME | SOUND_MASK_CD    |
		       SOUND_MASK_MIC    | SOUND_MASK_LINE  |
		       SOUND_MASK_SYNTH  | SOUND_MASK_PCM   |
		       SOUND_MASK_LINE2);
		switch (aci_idcode[1]) {
		case 'C': /* PCM20 radio */
			buf |= (SOUND_MASK_RADIO |
				SOUND_MASK_BASS  | SOUND_MASK_TREBLE);
			break;
		default:
			buf |= SOUND_MASK_LINE1;
		}
		__put_user(buf, p);
		return 0;
	case SOUND_MIXER_READ_RECMASK:
		buf = (SOUND_MASK_CD| SOUND_MASK_MIC| SOUND_MASK_LINE|
		       SOUND_MASK_SYNTH| SOUND_MASK_LINE2| SOUND_MASK_PCM);
		if (aci_idcode[1] == 'C') /* PCM20 radio */
			buf |= SOUND_MASK_RADIO;
		else
			buf |= SOUND_MASK_LINE1;

		__put_user(buf, p);
		return 0;
	case SOUND_MIXER_READ_RECSRC:
		buf = (SOUND_MASK_CD    | SOUND_MASK_MIC   | SOUND_MASK_LINE  |
		       SOUND_MASK_SYNTH | SOUND_MASK_LINE2);
		/* do we need aci_solo or can I get it from the ACI? */
		switch (aci_idcode[1]) {
		case 'B': /* PCM12 */
		case 'C': /* PCM20 radio */
			if (aci_version >= 0xb0) {
				if ((vol=aci_rw_cmd(ACI_STATUS,
						    ACI_S_GENERAL, -1))<0)
					return vol;
				if (vol & 0x20)
					buf |= SOUND_MASK_PCM;
			}
			else
				if (!aci_solo)
					buf |= SOUND_MASK_PCM;
			break;
		default:
			buf |= SOUND_MASK_PCM;
		}
		if (aci_idcode[1] == 'C') /* PCM20 radio */
			buf |= SOUND_MASK_RADIO;
		else
			buf |= SOUND_MASK_LINE1;

		__put_user(buf, p);
		return 0;
	case SOUND_MIXER_READ_CAPS:
		__put_user(0, p);
		return 0;
	case SOUND_MIXER_READ_VOLUME:
		return getvolume(p, 0x04, 0x03);
	case SOUND_MIXER_READ_CD:
		return getvolume(p, 0x0a, 0x09);
	case SOUND_MIXER_READ_MIC:
		return getvolume(p, 0x06, 0x05);
	case SOUND_MIXER_READ_LINE:
		return getvolume(p, 0x08, 0x07);
	case SOUND_MIXER_READ_SYNTH:
		return getvolume(p, 0x0c, 0x0b);
	case SOUND_MIXER_READ_PCM:
		return getvolume(p, 0x0e, 0x0d);
	case MIXER_READ(SOUND_MIXER_RADIO): /* fall through */
	case SOUND_MIXER_READ_LINE1:  /* AUX1 */
		return getvolume(p, 0x11, 0x10);
	case SOUND_MIXER_READ_LINE2:  /* AUX2 */
		return getvolume(p, 0x13, 0x12);
	case SOUND_MIXER_READ_BASS:   /* get band one */
		if (aci_idcode[1]=='C') {
			return getequalizer(p, 0x23, 0x22);
		}
		break;
	case SOUND_MIXER_READ_TREBLE: /* get band seven */
		if (aci_idcode[1]=='C') {
			return getequalizer(p, 0x2f, 0x2e);
		}
		break;
	case SOUND_MIXER_READ_IGAIN:  /* MIC pre-amp */
		if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
			/* aci_micpreamp or ACI? */
			if (aci_version >= 0xb0) {
				if ((buf=aci_indexed_cmd(ACI_STATUS,
							 ACI_S_READ_IGAIN))<0)
					return buf;
			}
			else
				buf=aci_micpreamp;
			vol = SCALE(3, 100, buf <= 3 ? buf : 3);
			vol |= vol << 8;
			__put_user(vol, p);
			return 0;
		}
		break;
	case SOUND_MIXER_READ_OGAIN:
		if (aci_amp)
			buf = (100 || 100<<8);
		else
			buf = 0;
		__put_user(buf, p);
		return 0;
	}
	return -EINVAL;
}

static struct mixer_operations aci_mixer_operations =
{
	.owner = THIS_MODULE,
	.id    = "ACI",
	.ioctl = aci_mixer_ioctl
};

/*
 * There is also an internal mixer in the codec (CS4231A or AD1845),
 * that deserves no purpose in an ACI based system which uses an
 * external ACI controlled stereo mixer. Make sure that this codec
 * mixer has the AUX1 input selected as the recording source, that the
 * input gain is set near maximum and that the other channels going
 * from the inputs to the codec output are muted.
 */

static int __init attach_aci(void)
{
	char *boardname;
	int i, rc = -EBUSY;

	init_MUTEX(&aci_sem);

	outb(0xE3, 0xf8f); /* Write MAD16 password */
	aci_port = (inb(0xf90) & 0x10) ?
		0x344: 0x354; /* Get aci_port from MC4_PORT */

	if (!request_region(aci_port, 3, "sound mixer (ACI)")) {
		printk(KERN_NOTICE
		       "aci: I/O area 0x%03x-0x%03x already used.\n",
		       aci_port, aci_port+2);
		goto out;
	}

	/* force ACI into a known state */
	rc = -EFAULT;
	for (i=0; i<3; i++)
		if (aci_rw_cmd(ACI_ERROR_OP, -1, -1)<0)
			goto out_release_region;

	/* official this is one aci read call: */
	rc = -EFAULT;
	if ((aci_idcode[0]=aci_rw_cmd(ACI_READ_IDCODE, -1, -1))<0 ||
	    (aci_idcode[1]=aci_rw_cmd(ACI_READ_IDCODE, -1, -1))<0) {
		printk(KERN_ERR "aci: Failed to read idcode on 0x%03x.\n",
		       aci_port);
		goto out_release_region;
	}

	if ((aci_version=aci_rw_cmd(ACI_READ_VERSION, -1, -1))<0) {
		printk(KERN_ERR "aci: Failed to read version on 0x%03x.\n",
		       aci_port);
		goto out_release_region;
	}

	if (aci_idcode[0] == 'm') {
		/* It looks like a miro sound card. */
		switch (aci_idcode[1]) {
		case 'A':
			boardname = "PCM1 pro / early PCM12";
			break;
		case 'B':
			boardname = "PCM12";
			break;
		case 'C':
			boardname = "PCM20 radio";
			break;
		default:
			boardname = "unknown miro";
		}
	} else {
		printk(KERN_WARNING "aci: Warning: unsupported card! - "
		       "no hardware, no specs...\n");
		boardname = "unknown Cardinal Technologies";
	}

	printk(KERN_INFO "<ACI 0x%02x, id %02x/%02x \"%c/%c\", (%s)> at 0x%03x\n",
	       aci_version,
	       aci_idcode[0], aci_idcode[1],
	       aci_idcode[0], aci_idcode[1],
	       boardname, aci_port);

	rc = -EBUSY;
	if (reset) {
		/* first write()s after reset fail with my PCM20 */
		if (aci_rw_cmd(ACI_INIT, -1, -1)<0 ||
		    aci_rw_cmd(ACI_ERROR_OP, ACI_ERROR_OP, ACI_ERROR_OP)<0 ||
		    aci_rw_cmd(ACI_ERROR_OP, ACI_ERROR_OP, ACI_ERROR_OP)<0)
			goto out_release_region;
	}

	/* the PCM20 is muted after reset (and reboot) */
	if (aci_rw_cmd(ACI_SET_MUTE, 0x00, -1)<0)
		goto out_release_region;

	if (ide>=0)
		if (aci_rw_cmd(ACI_SET_IDE, !ide, -1)<0)
			goto out_release_region;
	
	if (wss>=0 && aci_idcode[1]=='A')
		if (aci_rw_cmd(ACI_SET_WSS, !!wss, -1)<0)
			goto out_release_region;

	mixer_device = sound_install_mixer(MIXER_DRIVER_VERSION, boardname,
					   &aci_mixer_operations,
					   sizeof(aci_mixer_operations), NULL);
	rc = 0;
	if (mixer_device < 0) {
		printk(KERN_ERR "aci: Failed to install mixer.\n");
		rc = mixer_device;
		goto out_release_region;
	} /* else Maybe initialize the CS4231A mixer here... */
out:	return rc;
out_release_region:
	release_region(aci_port, 3);
	goto out;
}

static void __exit unload_aci(void)
{
	sound_unload_mixerdev(mixer_device);
	release_region(aci_port, 3);
}

module_init(attach_aci);
module_exit(unload_aci);
MODULE_LICENSE("GPL");