aboutsummaryrefslogtreecommitdiffstats
path: root/sound/pci/als4000.c
blob: cdc1134cdeddf6a1dcb87c91d90e7dda694d8d1b (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
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
/*
 *  card-als4000.c - driver for Avance Logic ALS4000 based soundcards.
 *  Copyright (C) 2000 by Bart Hartgers <bart@etpmod.phys.tue.nl>,
 *			  Jaroslav Kysela <perex@suse.cz>
 *  Copyright (C) 2002 by Andreas Mohr <hw7oshyuv3001@sneakemail.com>
 *
 *  Framework borrowed from Massimo Piccioni's card-als100.c.
 *
 * NOTES
 *
 *  Since Avance does not provide any meaningful documentation, and I
 *  bought an ALS4000 based soundcard, I was forced to base this driver
 *  on reverse engineering.
 *
 *  Note: this is no longer true. Pretty verbose chip docu (ALS4000a.PDF)
 *  can be found on the ALSA web site.
 *
 *  The ALS4000 seems to be the PCI-cousin of the ALS100. It contains an
 *  ALS100-like SB DSP/mixer, an OPL3 synth, a MPU401 and a gameport 
 *  interface. These subsystems can be mapped into ISA io-port space, 
 *  using the PCI-interface. In addition, the PCI-bit provides DMA and IRQ 
 *  services to the subsystems.
 * 
 * While ALS4000 is very similar to a SoundBlaster, the differences in
 * DMA and capturing require more changes to the SoundBlaster than
 * desirable, so I made this separate driver.
 * 
 * The ALS4000 can do real full duplex playback/capture.
 *
 * FMDAC:
 * - 0x4f -> port 0x14
 * - port 0x15 |= 1
 *
 * Enable/disable 3D sound:
 * - 0x50 -> port 0x14
 * - change bit 6 (0x40) of port 0x15
 *
 * Set QSound:
 * - 0xdb -> port 0x14
 * - set port 0x15:
 *   0x3e (mode 3), 0x3c (mode 2), 0x3a (mode 1), 0x38 (mode 0)
 *
 * Set KSound:
 * - value -> some port 0x0c0d
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.

 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <sound/driver.h>
#include <asm/io.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/gameport.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/rawmidi.h>
#include <sound/mpu401.h>
#include <sound/opl3.h>
#include <sound/sb.h>
#include <sound/initval.h>

MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>");
MODULE_DESCRIPTION("Avance Logic ALS4000");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS4000}}");

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

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
#ifdef SUPPORT_JOYSTICK
static int joystick_port[SNDRV_CARDS];
#endif

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for ALS4000 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
#ifdef SUPPORT_JOYSTICK
module_param_array(joystick_port, int, NULL, 0444);
MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
#endif

typedef struct {
	struct pci_dev *pci;
	unsigned long gcr;
#ifdef SUPPORT_JOYSTICK
	struct gameport *gameport;
#endif
} snd_card_als4000_t;

static struct pci_device_id snd_als4000_ids[] = {
	{ 0x4005, 0x4000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* ALS4000 */
	{ 0, }
};

MODULE_DEVICE_TABLE(pci, snd_als4000_ids);

static inline void snd_als4000_gcr_write_addr(unsigned long port, u32 reg, u32 val)
{
	outb(reg, port+0x0c);
	outl(val, port+0x08);
}

static inline void snd_als4000_gcr_write(sb_t *sb, u32 reg, u32 val)
{
	snd_als4000_gcr_write_addr(sb->alt_port, reg, val);
}	

static inline u32 snd_als4000_gcr_read_addr(unsigned long port, u32 reg)
{
	outb(reg, port+0x0c);
	return inl(port+0x08);
}

static inline u32 snd_als4000_gcr_read(sb_t *sb, u32 reg)
{
	return snd_als4000_gcr_read_addr(sb->alt_port, reg);
}

static void snd_als4000_set_rate(sb_t *chip, unsigned int rate)
{
	if (!(chip->mode & SB_RATE_LOCK)) {
		snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);
		snd_sbdsp_command(chip, rate>>8);
		snd_sbdsp_command(chip, rate);
	}
}

static void snd_als4000_set_capture_dma(sb_t *chip, dma_addr_t addr, unsigned size)
{
	snd_als4000_gcr_write(chip, 0xa2, addr);
	snd_als4000_gcr_write(chip, 0xa3, (size-1));
}

static void snd_als4000_set_playback_dma(sb_t *chip, dma_addr_t addr, unsigned size)
{
	snd_als4000_gcr_write(chip, 0x91, addr);
	snd_als4000_gcr_write(chip, 0x92, (size-1)|0x180000);
}

#define ALS4000_FORMAT_SIGNED	(1<<0)
#define ALS4000_FORMAT_16BIT	(1<<1)
#define ALS4000_FORMAT_STEREO	(1<<2)

static int snd_als4000_get_format(snd_pcm_runtime_t *runtime)
{
	int result;

	result = 0;
	if (snd_pcm_format_signed(runtime->format))
		result |= ALS4000_FORMAT_SIGNED;
	if (snd_pcm_format_physical_width(runtime->format) == 16)
		result |= ALS4000_FORMAT_16BIT;
	if (runtime->channels > 1)
		result |= ALS4000_FORMAT_STEREO;
	return result;
}

/* structure for setting up playback */
static struct {
	unsigned char dsp_cmd, dma_on, dma_off, format;
} playback_cmd_vals[]={
/* ALS4000_FORMAT_U8_MONO */
{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_MONO },
/* ALS4000_FORMAT_S8_MONO */	
{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_MONO },
/* ALS4000_FORMAT_U16L_MONO */
{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_MONO },
/* ALS4000_FORMAT_S16L_MONO */
{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_MONO },
/* ALS4000_FORMAT_U8_STEREO */
{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_STEREO },
/* ALS4000_FORMAT_S8_STEREO */	
{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_STEREO },
/* ALS4000_FORMAT_U16L_STEREO */
{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_STEREO },
/* ALS4000_FORMAT_S16L_STEREO */
{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_STEREO },
};
#define playback_cmd(chip) (playback_cmd_vals[(chip)->playback_format])

/* structure for setting up capture */
enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };
static unsigned char capture_cmd_vals[]=
{
CMD_WIDTH8|CMD_MONO,			/* ALS4000_FORMAT_U8_MONO */
CMD_WIDTH8|CMD_SIGNED|CMD_MONO,		/* ALS4000_FORMAT_S8_MONO */	
CMD_MONO,				/* ALS4000_FORMAT_U16L_MONO */
CMD_SIGNED|CMD_MONO,			/* ALS4000_FORMAT_S16L_MONO */
CMD_WIDTH8|CMD_STEREO,			/* ALS4000_FORMAT_U8_STEREO */
CMD_WIDTH8|CMD_SIGNED|CMD_STEREO,	/* ALS4000_FORMAT_S8_STEREO */	
CMD_STEREO,				/* ALS4000_FORMAT_U16L_STEREO */
CMD_SIGNED|CMD_STEREO,			/* ALS4000_FORMAT_S16L_STEREO */
};	
#define capture_cmd(chip) (capture_cmd_vals[(chip)->capture_format])

static int snd_als4000_hw_params(snd_pcm_substream_t * substream,
				 snd_pcm_hw_params_t * hw_params)
{
	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
}

static int snd_als4000_hw_free(snd_pcm_substream_t * substream)
{
	snd_pcm_lib_free_pages(substream);
	return 0;
}

static int snd_als4000_capture_prepare(snd_pcm_substream_t * substream)
{
	unsigned long flags;
	sb_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	unsigned long size;
	unsigned count;

	chip->capture_format = snd_als4000_get_format(runtime);
		
	size = snd_pcm_lib_buffer_bytes(substream);
	count = snd_pcm_lib_period_bytes(substream);
	
	if (chip->capture_format & ALS4000_FORMAT_16BIT)
		count >>=1;
	count--;

	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_als4000_set_rate(chip, runtime->rate);
	snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	spin_lock_irqsave(&chip->mixer_lock, flags );
	snd_sbmixer_write(chip, 0xdc, count);
	snd_sbmixer_write(chip, 0xdd, count>>8);
	spin_unlock_irqrestore(&chip->mixer_lock, flags );
	return 0;
}

static int snd_als4000_playback_prepare(snd_pcm_substream_t *substream)
{
	unsigned long flags;
	sb_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	unsigned long size;
	unsigned count;

	chip->playback_format = snd_als4000_get_format(runtime);
	
	size = snd_pcm_lib_buffer_bytes(substream);
	count = snd_pcm_lib_period_bytes(substream);
	
	if (chip->playback_format & ALS4000_FORMAT_16BIT)
		count >>=1;
	count--;
	
	/* FIXME: from second playback on, there's a lot more clicks and pops
	 * involved here than on first playback. Fiddling with
	 * tons of different settings didn't help (DMA, speaker on/off,
	 * reordering, ...). Something seems to get enabled on playback
	 * that I haven't found out how to disable again, which then causes
	 * the switching pops to reach the speakers the next time here. */
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_als4000_set_rate(chip, runtime->rate);
	snd_als4000_set_playback_dma(chip, runtime->dma_addr, size);
	
	/* SPEAKER_ON not needed, since dma_on seems to also enable speaker */
	/* snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); */
	snd_sbdsp_command(chip, playback_cmd(chip).dsp_cmd);
	snd_sbdsp_command(chip, playback_cmd(chip).format);
	snd_sbdsp_command(chip, count);
	snd_sbdsp_command(chip, count>>8);
	snd_sbdsp_command(chip, playback_cmd(chip).dma_off);	
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	
	return 0;
}

static int snd_als4000_capture_trigger(snd_pcm_substream_t * substream, int cmd)
{
	sb_t *chip = snd_pcm_substream_chip(substream);
	int result = 0;
	
	spin_lock(&chip->mixer_lock);
	if (cmd == SNDRV_PCM_TRIGGER_START) {
		chip->mode |= SB_RATE_LOCK_CAPTURE;
		snd_sbmixer_write(chip, 0xde, capture_cmd(chip));
	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
		chip->mode &= ~SB_RATE_LOCK_CAPTURE;
		snd_sbmixer_write(chip, 0xde, 0);
	} else {
		result = -EINVAL;
	}
	spin_unlock(&chip->mixer_lock);
	return result;
}

static int snd_als4000_playback_trigger(snd_pcm_substream_t * substream, int cmd)
{
	sb_t *chip = snd_pcm_substream_chip(substream);
	int result = 0;

	spin_lock(&chip->reg_lock);
	if (cmd == SNDRV_PCM_TRIGGER_START) {
		chip->mode |= SB_RATE_LOCK_PLAYBACK;
		snd_sbdsp_command(chip, playback_cmd(chip).dma_on);
	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
		snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
		chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
	} else {
		result = -EINVAL;
	}
	spin_unlock(&chip->reg_lock);
	return result;
}

static snd_pcm_uframes_t snd_als4000_capture_pointer(snd_pcm_substream_t * substream)
{
	sb_t *chip = snd_pcm_substream_chip(substream);
	unsigned int result;

	spin_lock(&chip->reg_lock);	
	result = snd_als4000_gcr_read(chip, 0xa4) & 0xffff;
	spin_unlock(&chip->reg_lock);
	return bytes_to_frames( substream->runtime, result );
}

static snd_pcm_uframes_t snd_als4000_playback_pointer(snd_pcm_substream_t * substream)
{
	sb_t *chip = snd_pcm_substream_chip(substream);
	unsigned result;

	spin_lock(&chip->reg_lock);	
	result = snd_als4000_gcr_read(chip, 0xa0) & 0xffff;
	spin_unlock(&chip->reg_lock);
	return bytes_to_frames( substream->runtime, result );
}

static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	sb_t *chip = dev_id;
	unsigned gcr_status;
	unsigned sb_status;

	/* find out which bit of the ALS4000 produced the interrupt */
	gcr_status = inb(chip->alt_port + 0xe);

	if ((gcr_status & 0x80) && (chip->playback_substream)) /* playback */
		snd_pcm_period_elapsed(chip->playback_substream);
	if ((gcr_status & 0x40) && (chip->capture_substream)) /* capturing */
		snd_pcm_period_elapsed(chip->capture_substream);
	if ((gcr_status & 0x10) && (chip->rmidi)) /* MPU401 interrupt */
		snd_mpu401_uart_interrupt(irq, chip->rmidi, regs);
	/* release the gcr */
	outb(gcr_status, chip->alt_port + 0xe);
	
	spin_lock(&chip->mixer_lock);
	sb_status = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
	spin_unlock(&chip->mixer_lock);
	
	if (sb_status & SB_IRQTYPE_8BIT) 
		snd_sb_ack_8bit(chip);
	if (sb_status & SB_IRQTYPE_16BIT) 
		snd_sb_ack_16bit(chip);
	if (sb_status & SB_IRQTYPE_MPUIN)
		inb(chip->mpu_port);
	if (sb_status & 0x20)
		inb(SBP(chip, RESET));
	return IRQ_HANDLED;
}

/*****************************************************************/

static snd_pcm_hardware_t snd_als4000_playback =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,	/* formats */
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0
};

static snd_pcm_hardware_t snd_als4000_capture =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,	/* formats */
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0
};

/*****************************************************************/

static int snd_als4000_playback_open(snd_pcm_substream_t * substream)
{
	sb_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;

	chip->playback_substream = substream;
	runtime->hw = snd_als4000_playback;
	return 0;
}

static int snd_als4000_playback_close(snd_pcm_substream_t * substream)
{
	sb_t *chip = snd_pcm_substream_chip(substream);

	chip->playback_substream = NULL;
	snd_pcm_lib_free_pages(substream);
	return 0;
}

static int snd_als4000_capture_open(snd_pcm_substream_t * substream)
{
	sb_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;

	chip->capture_substream = substream;
	runtime->hw = snd_als4000_capture;
	return 0;
}

static int snd_als4000_capture_close(snd_pcm_substream_t * substream)
{
	sb_t *chip = snd_pcm_substream_chip(substream);

	chip->capture_substream = NULL;
	snd_pcm_lib_free_pages(substream);
	return 0;
}

/******************************************************************/

static snd_pcm_ops_t snd_als4000_playback_ops = {
	.open =		snd_als4000_playback_open,
	.close =	snd_als4000_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_als4000_hw_params,
	.hw_free =	snd_als4000_hw_free,
	.prepare =	snd_als4000_playback_prepare,
	.trigger =	snd_als4000_playback_trigger,
	.pointer =	snd_als4000_playback_pointer
};

static snd_pcm_ops_t snd_als4000_capture_ops = {
	.open =		snd_als4000_capture_open,
	.close =	snd_als4000_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_als4000_hw_params,
	.hw_free =	snd_als4000_hw_free,
	.prepare =	snd_als4000_capture_prepare,
	.trigger =	snd_als4000_capture_trigger,
	.pointer =	snd_als4000_capture_pointer
};

static void snd_als4000_pcm_free(snd_pcm_t *pcm)
{
	sb_t *chip = pcm->private_data;
	chip->pcm = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

static int __devinit snd_als4000_pcm(sb_t *chip, int device)
{
	snd_pcm_t *pcm;
	int err;

	if ((err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm)) < 0)
		return err;
	pcm->private_free = snd_als4000_pcm_free;
	pcm->private_data = chip;
	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_als4000_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_als4000_capture_ops);

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
					      64*1024, 64*1024);

	chip->pcm = pcm;

	return 0;
}

/******************************************************************/

static void snd_als4000_set_addr(unsigned long gcr,
					unsigned int sb,
					unsigned int mpu,
					unsigned int opl,
					unsigned int game)
{
	u32 confA = 0;
	u32 confB = 0;

	if (mpu > 0)
		confB |= (mpu | 1) << 16;
	if (sb > 0)
		confB |= (sb | 1);
	if (game > 0)
		confA |= (game | 1) << 16;
	if (opl > 0)	
		confA |= (opl | 1);
	snd_als4000_gcr_write_addr(gcr, 0xa8, confA);
	snd_als4000_gcr_write_addr(gcr, 0xa9, confB);
}

static void __devinit snd_als4000_configure(sb_t *chip)
{
	unsigned tmp;
	int i;

	/* do some more configuration */
	spin_lock_irq(&chip->mixer_lock);
	tmp = snd_sbmixer_read(chip, 0xc0);
	snd_sbmixer_write(chip, 0xc0, tmp|0x80);
	/* always select DMA channel 0, since we do not actually use DMA */
	snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);
	snd_sbmixer_write(chip, 0xc0, tmp&0x7f);
	spin_unlock_irq(&chip->mixer_lock);
	
	spin_lock_irq(&chip->reg_lock);
	/* magic number. Enables interrupts(?) */
	snd_als4000_gcr_write(chip, 0x8c, 0x28000);
	for(i = 0x91; i <= 0x96; ++i)
		snd_als4000_gcr_write(chip, i, 0);
	
	snd_als4000_gcr_write(chip, 0x99, snd_als4000_gcr_read(chip, 0x99));
	spin_unlock_irq(&chip->reg_lock);
}

#ifdef SUPPORT_JOYSTICK
static int __devinit snd_als4000_create_gameport(snd_card_als4000_t *acard, int dev)
{
	struct gameport *gp;
	struct resource *r;
	int io_port;

	if (joystick_port[dev] == 0)
		return -ENODEV;

	if (joystick_port[dev] == 1) { /* auto-detect */
		for (io_port = 0x200; io_port <= 0x218; io_port += 8) {
			r = request_region(io_port, 8, "ALS4000 gameport");
			if (r)
				break;
		}
	} else {
		io_port = joystick_port[dev];
		r = request_region(io_port, 8, "ALS4000 gameport");
	}

	if (!r) {
		printk(KERN_WARNING "als4000: cannot reserve joystick ports\n");
		return -EBUSY;
	}

	acard->gameport = gp = gameport_allocate_port();
	if (!gp) {
		printk(KERN_ERR "als4000: cannot allocate memory for gameport\n");
		release_resource(r);
		kfree_nocheck(r);
		return -ENOMEM;
	}

	gameport_set_name(gp, "ALS4000 Gameport");
	gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));
	gameport_set_dev_parent(gp, &acard->pci->dev);
	gp->io = io_port;
	gameport_set_port_data(gp, r);

	/* Enable legacy joystick port */
	snd_als4000_set_addr(acard->gcr, 0, 0, 0, 1);

	gameport_register_port(acard->gameport);

	return 0;
}

static void snd_als4000_free_gameport(snd_card_als4000_t *acard)
{
	if (acard->gameport) {
		struct resource *r = gameport_get_port_data(acard->gameport);

		gameport_unregister_port(acard->gameport);
		acard->gameport = NULL;

		snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0); /* disable joystick */
		release_resource(r);
		kfree_nocheck(r);
	}
}
#else
static inline int snd_als4000_create_gameport(snd_card_als4000_t *acard, int dev) { return -ENOSYS; }
static inline void snd_als4000_free_gameport(snd_card_als4000_t *acard) { }
#endif

static void snd_card_als4000_free( snd_card_t *card )
{
	snd_card_als4000_t * acard = (snd_card_als4000_t *)card->private_data;

	/* make sure that interrupts are disabled */
	snd_als4000_gcr_write_addr( acard->gcr, 0x8c, 0);
	/* free resources */
	snd_als4000_free_gameport(acard);
	pci_release_regions(acard->pci);
	pci_disable_device(acard->pci);
}

static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
					  const struct pci_device_id *pci_id)
{
	static int dev;
	snd_card_t *card;
	snd_card_als4000_t *acard;
	unsigned long gcr;
	sb_t *chip;
	opl3_t *opl3;
	unsigned short word;
	int err;

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) {
		dev++;
		return -ENOENT;
	}

	/* enable PCI device */
	if ((err = pci_enable_device(pci)) < 0) {
		return err;
	}
	/* check, if we can restrict PCI DMA transfers to 24 bits */
	if (pci_set_dma_mask(pci, 0x00ffffff) < 0 ||
	    pci_set_consistent_dma_mask(pci, 0x00ffffff) < 0) {
		snd_printk("architecture does not support 24bit PCI busmaster DMA\n");
		pci_disable_device(pci);
		return -ENXIO;
	}

	if ((err = pci_request_regions(pci, "ALS4000")) < 0) {
		pci_disable_device(pci);
		return err;
	}
	gcr = pci_resource_start(pci, 0);

	pci_read_config_word(pci, PCI_COMMAND, &word);
	pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);
	pci_set_master(pci);
	
	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 
			    sizeof( snd_card_als4000_t ) );
	if (card == NULL) {
		pci_release_regions(pci);
		pci_disable_device(pci);
		return -ENOMEM;
	}

	acard = (snd_card_als4000_t *)card->private_data;
	acard->pci = pci;
	acard->gcr = gcr;
	card->private_free = snd_card_als4000_free;

	/* disable all legacy ISA stuff */
	snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0);

	if ((err = snd_sbdsp_create(card,
				    gcr + 0x10,
				    pci->irq,
				    snd_als4000_interrupt,
				    -1,
				    -1,
				    SB_HW_ALS4000,
				    &chip)) < 0) {
		snd_card_free(card);
		return err;
	}

	chip->pci = pci;
	chip->alt_port = gcr;
	snd_card_set_dev(card, &pci->dev);

	snd_als4000_configure(chip);

	strcpy(card->driver, "ALS4000");
	strcpy(card->shortname, "Avance Logic ALS4000");
	sprintf(card->longname, "%s at 0x%lx, irq %i",
		card->shortname, chip->alt_port, chip->irq);

	if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
				        gcr+0x30, 1, pci->irq, 0,
				        &chip->rmidi)) < 0) {
		snd_card_free(card);
		printk(KERN_ERR "als4000: no MPU-401device at 0x%lx ?\n", gcr+0x30);
		return err;
	}

	if ((err = snd_als4000_pcm(chip, 0)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_sbmixer_new(chip)) < 0) {
		snd_card_free(card);
		return err;
	}	    

	if (snd_opl3_create(card, gcr+0x10, gcr+0x12,
			    OPL3_HW_AUTO, 1, &opl3) < 0) {
		printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx ?\n",
			   gcr+0x10, gcr+0x12 );
	} else {
		if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
			snd_card_free(card);
			return err;
		}
	}

	snd_als4000_create_gameport(acard, dev);

	if ((err = snd_card_register(card)) < 0) {
		snd_card_free(card);
		return err;
	}
	pci_set_drvdata(pci, card);
	dev++;
	return 0;
}

static void __devexit snd_card_als4000_remove(struct pci_dev *pci)
{
	snd_card_free(pci_get_drvdata(pci));
	pci_set_drvdata(pci, NULL);
}

static struct pci_driver driver = {
	.name = "ALS4000",
	.id_table = snd_als4000_ids,
	.probe = snd_card_als4000_probe,
	.remove = __devexit_p(snd_card_als4000_remove),
};

static int __init alsa_card_als4000_init(void)
{
	return pci_register_driver(&driver);
}

static void __exit alsa_card_als4000_exit(void)
{
	pci_unregister_driver(&driver);
}

module_init(alsa_card_als4000_init)
module_exit(alsa_card_als4000_exit)