summaryrefslogtreecommitdiff
path: root/sound/isa/ad1816a/ad1816a_lib.c
blob: ae860360ecf963a3620357e505b2d6025eb57800 (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

/*
    ad1816a.c - lowlevel code for Analog Devices AD1816A chip.
    Copyright (C) 1999-2000 by Massimo Piccioni <dafastidio@libero.it>

    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 <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <sound/core.h>
#include <sound/ad1816a.h>

#include <asm/io.h>
#include <asm/dma.h>

MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
MODULE_DESCRIPTION("lowlevel code for Analog Devices AD1816A chip");
MODULE_LICENSE("GPL");

static inline int snd_ad1816a_busy_wait(ad1816a_t *chip)
{
	int timeout;

	for (timeout = 1000; timeout-- > 0; udelay(10))
		if (inb(AD1816A_REG(AD1816A_CHIP_STATUS)) & AD1816A_READY)
			return 0;

	snd_printk("chip busy.\n");
	return -EBUSY;
}

static inline unsigned char snd_ad1816a_in(ad1816a_t *chip, unsigned char reg)
{
	snd_ad1816a_busy_wait(chip);
	return inb(AD1816A_REG(reg));
}

static inline void snd_ad1816a_out(ad1816a_t *chip, unsigned char reg,
			    unsigned char value)
{
	snd_ad1816a_busy_wait(chip);
	outb(value, AD1816A_REG(reg));
}

static inline void snd_ad1816a_out_mask(ad1816a_t *chip, unsigned char reg,
				 unsigned char mask, unsigned char value)
{
	snd_ad1816a_out(chip, reg,
		(value & mask) | (snd_ad1816a_in(chip, reg) & ~mask));
}

static unsigned short snd_ad1816a_read(ad1816a_t *chip, unsigned char reg)
{
	snd_ad1816a_out(chip, AD1816A_INDIR_ADDR, reg & 0x3f);
	return snd_ad1816a_in(chip, AD1816A_INDIR_DATA_LOW) |
		(snd_ad1816a_in(chip, AD1816A_INDIR_DATA_HIGH) << 8);
}

static void snd_ad1816a_write(ad1816a_t *chip, unsigned char reg,
			      unsigned short value)
{
	snd_ad1816a_out(chip, AD1816A_INDIR_ADDR, reg & 0x3f);
	snd_ad1816a_out(chip, AD1816A_INDIR_DATA_LOW, value & 0xff);
	snd_ad1816a_out(chip, AD1816A_INDIR_DATA_HIGH, (value >> 8) & 0xff);
}

static void snd_ad1816a_write_mask(ad1816a_t *chip, unsigned char reg,
				   unsigned short mask, unsigned short value)
{
	snd_ad1816a_write(chip, reg,
		(value & mask) | (snd_ad1816a_read(chip, reg) & ~mask));
}


static unsigned char snd_ad1816a_get_format(ad1816a_t *chip,
					    unsigned int format, int channels)
{
	unsigned char retval = AD1816A_FMT_LINEAR_8;

	switch (format) {
	case SNDRV_PCM_FORMAT_MU_LAW:
		retval = AD1816A_FMT_ULAW_8;
		break;
	case SNDRV_PCM_FORMAT_A_LAW:
		retval = AD1816A_FMT_ALAW_8;
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		retval = AD1816A_FMT_LINEAR_16_LIT;
		break;
	case SNDRV_PCM_FORMAT_S16_BE:
		retval = AD1816A_FMT_LINEAR_16_BIG;
	}
	return (channels > 1) ? (retval | AD1816A_FMT_STEREO) : retval;
}

static int snd_ad1816a_open(ad1816a_t *chip, unsigned int mode)
{
	unsigned long flags;

	spin_lock_irqsave(&chip->lock, flags);

	if (chip->mode & mode) {
		spin_unlock_irqrestore(&chip->lock, flags);
		return -EAGAIN;
	}

	switch ((mode &= AD1816A_MODE_OPEN)) {
	case AD1816A_MODE_PLAYBACK:
		snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
			AD1816A_PLAYBACK_IRQ_PENDING, 0x00);
		snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
			AD1816A_PLAYBACK_IRQ_ENABLE, 0xffff);
		break;
	case AD1816A_MODE_CAPTURE:
		snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
			AD1816A_CAPTURE_IRQ_PENDING, 0x00);
		snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
			AD1816A_CAPTURE_IRQ_ENABLE, 0xffff);
		break;
	case AD1816A_MODE_TIMER:
		snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
			AD1816A_TIMER_IRQ_PENDING, 0x00);
		snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
			AD1816A_TIMER_IRQ_ENABLE, 0xffff);
	}
	chip->mode |= mode;

	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}

static void snd_ad1816a_close(ad1816a_t *chip, unsigned int mode)
{
	unsigned long flags;

	spin_lock_irqsave(&chip->lock, flags);

	switch ((mode &= AD1816A_MODE_OPEN)) {
	case AD1816A_MODE_PLAYBACK:
		snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
			AD1816A_PLAYBACK_IRQ_PENDING, 0x00);
		snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
			AD1816A_PLAYBACK_IRQ_ENABLE, 0x0000);
		break;
	case AD1816A_MODE_CAPTURE:
		snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
			AD1816A_CAPTURE_IRQ_PENDING, 0x00);
		snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
			AD1816A_CAPTURE_IRQ_ENABLE, 0x0000);
		break;
	case AD1816A_MODE_TIMER:
		snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
			AD1816A_TIMER_IRQ_PENDING, 0x00);
		snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
			AD1816A_TIMER_IRQ_ENABLE, 0x0000);
	}
	if (!((chip->mode &= ~mode) & AD1816A_MODE_OPEN))
		chip->mode = 0;

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


static int snd_ad1816a_trigger(ad1816a_t *chip, unsigned char what,
			       int channel, int cmd)
{
	int error = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_STOP:
		spin_lock(&chip->lock);
		cmd = (cmd == SNDRV_PCM_TRIGGER_START) ? 0xff: 0x00;
		if (what & AD1816A_PLAYBACK_ENABLE)
			snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
				AD1816A_PLAYBACK_ENABLE, cmd);
		if (what & AD1816A_CAPTURE_ENABLE)
			snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
				AD1816A_CAPTURE_ENABLE, cmd);
		spin_unlock(&chip->lock);
		break;
	default:
		snd_printk("invalid trigger mode 0x%x.\n", what);
		error = -EINVAL;
	}

	return error;
}

static int snd_ad1816a_playback_trigger(snd_pcm_substream_t *substream, int cmd)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);
	return snd_ad1816a_trigger(chip, AD1816A_PLAYBACK_ENABLE,
		SNDRV_PCM_STREAM_PLAYBACK, cmd);
}

static int snd_ad1816a_capture_trigger(snd_pcm_substream_t *substream, int cmd)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);
	return snd_ad1816a_trigger(chip, AD1816A_CAPTURE_ENABLE,
		SNDRV_PCM_STREAM_CAPTURE, cmd);
}

static int snd_ad1816a_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_ad1816a_hw_free(snd_pcm_substream_t * substream)
{
	return snd_pcm_lib_free_pages(substream);
}

static int snd_ad1816a_playback_prepare(snd_pcm_substream_t *substream)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);
	unsigned long flags;
	snd_pcm_runtime_t *runtime = substream->runtime;
	unsigned int size, rate;

	spin_lock_irqsave(&chip->lock, flags);

	chip->p_dma_size = size = snd_pcm_lib_buffer_bytes(substream);
	snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
		AD1816A_PLAYBACK_ENABLE | AD1816A_PLAYBACK_PIO, 0x00);

	snd_dma_program(chip->dma1, runtime->dma_addr, size,
			DMA_MODE_WRITE | DMA_AUTOINIT);

	rate = runtime->rate;
	if (chip->clock_freq)
		rate = (rate * 33000) / chip->clock_freq;
	snd_ad1816a_write(chip, AD1816A_PLAYBACK_SAMPLE_RATE, rate);
	snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
		AD1816A_FMT_ALL | AD1816A_FMT_STEREO,
		snd_ad1816a_get_format(chip, runtime->format,
			runtime->channels));

	snd_ad1816a_write(chip, AD1816A_PLAYBACK_BASE_COUNT,
		snd_pcm_lib_period_bytes(substream) / 4 - 1);

	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}

static int snd_ad1816a_capture_prepare(snd_pcm_substream_t *substream)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);
	unsigned long flags;
	snd_pcm_runtime_t *runtime = substream->runtime;
	unsigned int size, rate;

	spin_lock_irqsave(&chip->lock, flags);

	chip->c_dma_size = size = snd_pcm_lib_buffer_bytes(substream);
	snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
		AD1816A_CAPTURE_ENABLE | AD1816A_CAPTURE_PIO, 0x00);

	snd_dma_program(chip->dma2, runtime->dma_addr, size,
			DMA_MODE_READ | DMA_AUTOINIT);

	rate = runtime->rate;
	if (chip->clock_freq)
		rate = (rate * 33000) / chip->clock_freq;
	snd_ad1816a_write(chip, AD1816A_CAPTURE_SAMPLE_RATE, rate);
	snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
		AD1816A_FMT_ALL | AD1816A_FMT_STEREO,
		snd_ad1816a_get_format(chip, runtime->format,
			runtime->channels));

	snd_ad1816a_write(chip, AD1816A_CAPTURE_BASE_COUNT,
		snd_pcm_lib_period_bytes(substream) / 4 - 1);

	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}


static snd_pcm_uframes_t snd_ad1816a_playback_pointer(snd_pcm_substream_t *substream)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);
	size_t ptr;
	if (!(chip->mode & AD1816A_MODE_PLAYBACK))
		return 0;
	ptr = snd_dma_pointer(chip->dma1, chip->p_dma_size);
	return bytes_to_frames(substream->runtime, ptr);
}

static snd_pcm_uframes_t snd_ad1816a_capture_pointer(snd_pcm_substream_t *substream)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);
	size_t ptr;
	if (!(chip->mode & AD1816A_MODE_CAPTURE))
		return 0;
	ptr = snd_dma_pointer(chip->dma2, chip->c_dma_size);
	return bytes_to_frames(substream->runtime, ptr);
}


static irqreturn_t snd_ad1816a_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	ad1816a_t *chip = dev_id;
	unsigned char status;

	spin_lock(&chip->lock);
	status = snd_ad1816a_in(chip, AD1816A_INTERRUPT_STATUS);
	spin_unlock(&chip->lock);

	if ((status & AD1816A_PLAYBACK_IRQ_PENDING) && chip->playback_substream)
		snd_pcm_period_elapsed(chip->playback_substream);

	if ((status & AD1816A_CAPTURE_IRQ_PENDING) && chip->capture_substream)
		snd_pcm_period_elapsed(chip->capture_substream);

	if ((status & AD1816A_TIMER_IRQ_PENDING) && chip->timer)
		snd_timer_interrupt(chip->timer, chip->timer->sticks);

	spin_lock(&chip->lock);
	snd_ad1816a_out(chip, AD1816A_INTERRUPT_STATUS, 0x00);
	spin_unlock(&chip->lock);
	return IRQ_HANDLED;
}


static snd_pcm_hardware_t snd_ad1816a_playback = {
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		(SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
				 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
				 SNDRV_PCM_FMTBIT_S16_BE),
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		55200,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

static snd_pcm_hardware_t snd_ad1816a_capture = {
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		(SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
				 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
				 SNDRV_PCM_FMTBIT_S16_BE),
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		55200,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	(128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

#if 0 /* not used now */
static int snd_ad1816a_timer_close(snd_timer_t *timer)
{
	ad1816a_t *chip = snd_timer_chip(timer);
	snd_ad1816a_close(chip, AD1816A_MODE_TIMER);
	return 0;
}

static int snd_ad1816a_timer_open(snd_timer_t *timer)
{
	ad1816a_t *chip = snd_timer_chip(timer);
	snd_ad1816a_open(chip, AD1816A_MODE_TIMER);
	return 0;
}

static unsigned long snd_ad1816a_timer_resolution(snd_timer_t *timer)
{
	snd_assert(timer != NULL, return 0);

	return 10000;
}

static int snd_ad1816a_timer_start(snd_timer_t *timer)
{
	unsigned short bits;
	unsigned long flags;
	ad1816a_t *chip = snd_timer_chip(timer);
	spin_lock_irqsave(&chip->lock, flags);
	bits = snd_ad1816a_read(chip, AD1816A_INTERRUPT_ENABLE);

	if (!(bits & AD1816A_TIMER_ENABLE)) {
		snd_ad1816a_write(chip, AD1816A_TIMER_BASE_COUNT,
			timer->sticks & 0xffff);

		snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
			AD1816A_TIMER_ENABLE, 0xffff);
	}
	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}

static int snd_ad1816a_timer_stop(snd_timer_t *timer)
{
	unsigned long flags;
	ad1816a_t *chip = snd_timer_chip(timer);
	spin_lock_irqsave(&chip->lock, flags);

	snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
		AD1816A_TIMER_ENABLE, 0x0000);

	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}

static struct _snd_timer_hardware snd_ad1816a_timer_table = {
	.flags =	SNDRV_TIMER_HW_AUTO,
	.resolution =	10000,
	.ticks =	65535,
	.open =		snd_ad1816a_timer_open,
	.close =	snd_ad1816a_timer_close,
	.c_resolution =	snd_ad1816a_timer_resolution,
	.start =	snd_ad1816a_timer_start,
	.stop =		snd_ad1816a_timer_stop,
};
#endif /* not used now */


static int snd_ad1816a_playback_open(snd_pcm_substream_t *substream)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int error;

	if ((error = snd_ad1816a_open(chip, AD1816A_MODE_PLAYBACK)) < 0)
		return error;
	snd_pcm_set_sync(substream);
	runtime->hw = snd_ad1816a_playback;
	snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.buffer_bytes_max);
	snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.period_bytes_max);
	chip->playback_substream = substream;
	return 0;
}

static int snd_ad1816a_capture_open(snd_pcm_substream_t *substream)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int error;

	if ((error = snd_ad1816a_open(chip, AD1816A_MODE_CAPTURE)) < 0)
		return error;
	snd_pcm_set_sync(substream);
	runtime->hw = snd_ad1816a_capture;
	snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.buffer_bytes_max);
	snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.period_bytes_max);
	chip->capture_substream = substream;
	return 0;
}

static int snd_ad1816a_playback_close(snd_pcm_substream_t *substream)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);

	chip->playback_substream = NULL;
	snd_ad1816a_close(chip, AD1816A_MODE_PLAYBACK);
	return 0;
}

static int snd_ad1816a_capture_close(snd_pcm_substream_t *substream)
{
	ad1816a_t *chip = snd_pcm_substream_chip(substream);

	chip->capture_substream = NULL;
	snd_ad1816a_close(chip, AD1816A_MODE_CAPTURE);
	return 0;
}


static void snd_ad1816a_init(ad1816a_t *chip)
{
	unsigned long flags;

	spin_lock_irqsave(&chip->lock, flags);

	snd_ad1816a_out(chip, AD1816A_INTERRUPT_STATUS, 0x00);
	snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
		AD1816A_PLAYBACK_ENABLE | AD1816A_PLAYBACK_PIO, 0x00);
	snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
		AD1816A_CAPTURE_ENABLE | AD1816A_CAPTURE_PIO, 0x00);
	snd_ad1816a_write(chip, AD1816A_INTERRUPT_ENABLE, 0x0000);
	snd_ad1816a_write_mask(chip, AD1816A_CHIP_CONFIG,
		AD1816A_CAPTURE_NOT_EQUAL | AD1816A_WSS_ENABLE, 0xffff);
	snd_ad1816a_write(chip, AD1816A_DSP_CONFIG, 0x0000);
	snd_ad1816a_write(chip, AD1816A_POWERDOWN_CTRL, 0x0000);

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

static int snd_ad1816a_probe(ad1816a_t *chip)
{
	unsigned long flags;

	spin_lock_irqsave(&chip->lock, flags);

	switch (chip->version = snd_ad1816a_read(chip, AD1816A_VERSION_ID)) {
	case 0:
		chip->hardware = AD1816A_HW_AD1815;
		break;
	case 1:
		chip->hardware = AD1816A_HW_AD18MAX10;
		break;
	case 3:
		chip->hardware = AD1816A_HW_AD1816A;
		break;
	default:
		chip->hardware = AD1816A_HW_AUTO;
	}

	spin_unlock_irqrestore(&chip->lock, flags);
	return 0;
}

static int snd_ad1816a_free(ad1816a_t *chip)
{
	if (chip->res_port) {
		release_resource(chip->res_port);
		kfree_nocheck(chip->res_port);
	}
	if (chip->irq >= 0)
		free_irq(chip->irq, (void *) chip);
	if (chip->dma1 >= 0) {
		snd_dma_disable(chip->dma1);
		free_dma(chip->dma1);
	}
	if (chip->dma2 >= 0) {
		snd_dma_disable(chip->dma2);
		free_dma(chip->dma2);
	}
	kfree(chip);
	return 0;
}

static int snd_ad1816a_dev_free(snd_device_t *device)
{
	ad1816a_t *chip = device->device_data;
	return snd_ad1816a_free(chip);
}

static const char *snd_ad1816a_chip_id(ad1816a_t *chip)
{
	switch (chip->hardware) {
	case AD1816A_HW_AD1816A: return "AD1816A";
	case AD1816A_HW_AD1815:	return "AD1815";
	case AD1816A_HW_AD18MAX10: return "AD18max10";
	default:
		snd_printk("Unknown chip version %d:%d.\n",
			chip->version, chip->hardware);
		return "AD1816A - unknown";
	}
}

int snd_ad1816a_create(snd_card_t *card,
		       unsigned long port, int irq, int dma1, int dma2,
		       ad1816a_t **rchip)
{
        static snd_device_ops_t ops = {
		.dev_free =	snd_ad1816a_dev_free,
	};
	int error;
	ad1816a_t *chip;

	*rchip = NULL;

	chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
	if (chip == NULL)
		return -ENOMEM;
	chip->irq = -1;
	chip->dma1 = -1;
	chip->dma2 = -1;

	if ((chip->res_port = request_region(port, 16, "AD1816A")) == NULL) {
		snd_printk(KERN_ERR "ad1816a: can't grab port 0x%lx\n", port);
		snd_ad1816a_free(chip);
		return -EBUSY;
	}
	if (request_irq(irq, snd_ad1816a_interrupt, SA_INTERRUPT, "AD1816A", (void *) chip)) {
		snd_printk(KERN_ERR "ad1816a: can't grab IRQ %d\n", irq);
		snd_ad1816a_free(chip);
		return -EBUSY;
	}
	chip->irq = irq;
	if (request_dma(dma1, "AD1816A - 1")) {
		snd_printk(KERN_ERR "ad1816a: can't grab DMA1 %d\n", dma1);
		snd_ad1816a_free(chip);
		return -EBUSY;
	}
	chip->dma1 = dma1;
	if (request_dma(dma2, "AD1816A - 2")) {
		snd_printk(KERN_ERR "ad1816a: can't grab DMA2 %d\n", dma2);
		snd_ad1816a_free(chip);
		return -EBUSY;
	}
	chip->dma2 = dma2;

	chip->card = card;
	chip->port = port;
	spin_lock_init(&chip->lock);

	if ((error = snd_ad1816a_probe(chip))) {
		snd_ad1816a_free(chip);
		return error;
	}

	snd_ad1816a_init(chip);

	/* Register device */
	if ((error = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
		snd_ad1816a_free(chip);
		return error;
	}

	*rchip = chip;
	return 0;
}

static snd_pcm_ops_t snd_ad1816a_playback_ops = {
	.open =		snd_ad1816a_playback_open,
	.close =	snd_ad1816a_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_ad1816a_hw_params,
	.hw_free =	snd_ad1816a_hw_free,
	.prepare =	snd_ad1816a_playback_prepare,
	.trigger =	snd_ad1816a_playback_trigger,
	.pointer =	snd_ad1816a_playback_pointer,
};

static snd_pcm_ops_t snd_ad1816a_capture_ops = {
	.open =		snd_ad1816a_capture_open,
	.close =	snd_ad1816a_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_ad1816a_hw_params,
	.hw_free =	snd_ad1816a_hw_free,
	.prepare =	snd_ad1816a_capture_prepare,
	.trigger =	snd_ad1816a_capture_trigger,
	.pointer =	snd_ad1816a_capture_pointer,
};

static void snd_ad1816a_pcm_free(snd_pcm_t *pcm)
{
	ad1816a_t *chip = pcm->private_data;
	chip->pcm = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

int snd_ad1816a_pcm(ad1816a_t *chip, int device, snd_pcm_t **rpcm)
{
	int error;
	snd_pcm_t *pcm;

	if ((error = snd_pcm_new(chip->card, "AD1816A", device, 1, 1, &pcm)))
		return error;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ad1816a_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ad1816a_capture_ops);

	pcm->private_data = chip;
	pcm->private_free = snd_ad1816a_pcm_free;
	pcm->info_flags = (chip->dma1 == chip->dma2 ) ? SNDRV_PCM_INFO_JOINT_DUPLEX : 0;

	strcpy(pcm->name, snd_ad1816a_chip_id(chip));
	snd_ad1816a_init(chip);

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_isa_data(),
					      64*1024, chip->dma1 > 3 || chip->dma2 > 3 ? 128*1024 : 64*1024);

	chip->pcm = pcm;
	if (rpcm)
		*rpcm = pcm;
	return 0;
}

#if 0 /* not used now */
static void snd_ad1816a_timer_free(snd_timer_t *timer)
{
	ad1816a_t *chip = timer->private_data;
	chip->timer = NULL;
}

int snd_ad1816a_timer(ad1816a_t *chip, int device, snd_timer_t **rtimer)
{
	snd_timer_t *timer;
	snd_timer_id_t tid;
	int error;

	tid.dev_class = SNDRV_TIMER_CLASS_CARD;
	tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
	tid.card = chip->card->number;
	tid.device = device;
	tid.subdevice = 0;
	if ((error = snd_timer_new(chip->card, "AD1816A", &tid, &timer)) < 0)
		return error;
	strcpy(timer->name, snd_ad1816a_chip_id(chip));
	timer->private_data = chip;
	timer->private_free = snd_ad1816a_timer_free;
	chip->timer = timer;
	timer->hw = snd_ad1816a_timer_table;
	if (rtimer)
		*rtimer = timer;
	return 0;
}
#endif /* not used now */

/*
 *
 */

static int snd_ad1816a_info_mux(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	static char *texts[8] = {
		"Line", "Mix", "CD", "Synth", "Video",
		"Mic", "Phone",
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 2;
	uinfo->value.enumerated.items = 7;
	if (uinfo->value.enumerated.item > 6)
		uinfo->value.enumerated.item = 6;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_ad1816a_get_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ad1816a_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned short val;
	
	spin_lock_irqsave(&chip->lock, flags);
	val = snd_ad1816a_read(chip, AD1816A_ADC_SOURCE_SEL);
	spin_unlock_irqrestore(&chip->lock, flags);
	ucontrol->value.enumerated.item[0] = (val >> 12) & 7;
	ucontrol->value.enumerated.item[1] = (val >> 4) & 7;
	return 0;
}

static int snd_ad1816a_put_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ad1816a_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned short val;
	int change;
	
	if (ucontrol->value.enumerated.item[0] > 6 ||
	    ucontrol->value.enumerated.item[1] > 6)
		return -EINVAL;
	val = (ucontrol->value.enumerated.item[0] << 12) |
	      (ucontrol->value.enumerated.item[1] << 4);
	spin_lock_irqsave(&chip->lock, flags);
	change = snd_ad1816a_read(chip, AD1816A_ADC_SOURCE_SEL) != val;
	snd_ad1816a_write(chip, AD1816A_ADC_SOURCE_SEL, val);
	spin_unlock_irqrestore(&chip->lock, flags);
	return change;
}

#define AD1816A_SINGLE(xname, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .info = snd_ad1816a_info_single, \
  .get = snd_ad1816a_get_single, .put = snd_ad1816a_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_ad1816a_info_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 16) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_ad1816a_get_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ad1816a_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	
	spin_lock_irqsave(&chip->lock, flags);
	ucontrol->value.integer.value[0] = (snd_ad1816a_read(chip, reg) >> shift) & mask;
	spin_unlock_irqrestore(&chip->lock, flags);
	if (invert)
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
	return 0;
}

static int snd_ad1816a_put_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ad1816a_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	int change;
	unsigned short old_val, val;
	
	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
		val = mask - val;
	val <<= shift;
	spin_lock_irqsave(&chip->lock, flags);
	old_val = snd_ad1816a_read(chip, reg);
	val = (old_val & ~(mask << shift)) | val;
	change = val != old_val;
	snd_ad1816a_write(chip, reg, val);
	spin_unlock_irqrestore(&chip->lock, flags);
	return change;
}

#define AD1816A_DOUBLE(xname, reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .info = snd_ad1816a_info_double, \
  .get = snd_ad1816a_get_double, .put = snd_ad1816a_put_double, \
  .private_value = reg | (shift_left << 8) | (shift_right << 12) | (mask << 16) | (invert << 24) }

static int snd_ad1816a_info_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 16) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_ad1816a_get_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ad1816a_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift_left = (kcontrol->private_value >> 8) & 0x0f;
	int shift_right = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	unsigned short val;
	
	spin_lock_irqsave(&chip->lock, flags);
	val = snd_ad1816a_read(chip, reg);
	ucontrol->value.integer.value[0] = (val >> shift_left) & mask;
	ucontrol->value.integer.value[1] = (val >> shift_right) & mask;
	spin_unlock_irqrestore(&chip->lock, flags);
	if (invert) {
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
		ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
	}
	return 0;
}

static int snd_ad1816a_put_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ad1816a_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift_left = (kcontrol->private_value >> 8) & 0x0f;
	int shift_right = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	int change;
	unsigned short old_val, val1, val2;
	
	val1 = ucontrol->value.integer.value[0] & mask;
	val2 = ucontrol->value.integer.value[1] & mask;
	if (invert) {
		val1 = mask - val1;
		val2 = mask - val2;
	}
	val1 <<= shift_left;
	val2 <<= shift_right;
	spin_lock_irqsave(&chip->lock, flags);
	old_val = snd_ad1816a_read(chip, reg);
	val1 = (old_val & ~((mask << shift_left) | (mask << shift_right))) | val1 | val2;
	change = val1 != old_val;
	snd_ad1816a_write(chip, reg, val1);
	spin_unlock_irqrestore(&chip->lock, flags);
	return change;
}

static snd_kcontrol_new_t snd_ad1816a_controls[] = {
AD1816A_DOUBLE("Master Playback Switch", AD1816A_MASTER_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE("Master Playback Volume", AD1816A_MASTER_ATT, 8, 0, 31, 1),
AD1816A_DOUBLE("PCM Playback Switch", AD1816A_VOICE_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE("PCM Playback Volume", AD1816A_VOICE_ATT, 8, 0, 63, 1),
AD1816A_DOUBLE("Line Playback Switch", AD1816A_LINE_GAIN_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE("Line Playback Volume", AD1816A_LINE_GAIN_ATT, 8, 0, 31, 1),
AD1816A_DOUBLE("CD Playback Switch", AD1816A_CD_GAIN_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE("CD Playback Volume", AD1816A_CD_GAIN_ATT, 8, 0, 31, 1),
AD1816A_DOUBLE("Synth Playback Switch", AD1816A_SYNTH_GAIN_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE("Synth Playback Volume", AD1816A_SYNTH_GAIN_ATT, 8, 0, 31, 1),
AD1816A_DOUBLE("FM Playback Switch", AD1816A_FM_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE("FM Playback Volume", AD1816A_FM_ATT, 8, 0, 63, 1),
AD1816A_SINGLE("Mic Playback Switch", AD1816A_MIC_GAIN_ATT, 15, 1, 1),
AD1816A_SINGLE("Mic Playback Volume", AD1816A_MIC_GAIN_ATT, 8, 31, 1),
AD1816A_SINGLE("Mic Boost", AD1816A_MIC_GAIN_ATT, 14, 1, 0),
AD1816A_DOUBLE("Video Playback Switch", AD1816A_VID_GAIN_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE("Video Playback Volume", AD1816A_VID_GAIN_ATT, 8, 0, 31, 1),
AD1816A_SINGLE("Phone Capture Switch", AD1816A_PHONE_IN_GAIN_ATT, 15, 1, 1),
AD1816A_SINGLE("Phone Capture Volume", AD1816A_PHONE_IN_GAIN_ATT, 0, 15, 1),
AD1816A_SINGLE("Phone Playback Switch", AD1816A_PHONE_OUT_ATT, 7, 1, 1),
AD1816A_SINGLE("Phone Playback Volume", AD1816A_PHONE_OUT_ATT, 0, 31, 1),
{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Capture Source",
	.info = snd_ad1816a_info_mux,
	.get = snd_ad1816a_get_mux,
	.put = snd_ad1816a_put_mux,
},
AD1816A_DOUBLE("Capture Switch", AD1816A_ADC_PGA, 15, 7, 1, 1),
AD1816A_DOUBLE("Capture Volume", AD1816A_ADC_PGA, 8, 0, 15, 0),
AD1816A_SINGLE("3D Control - Switch", AD1816A_3D_PHAT_CTRL, 15, 1, 1),
AD1816A_SINGLE("3D Control - Level", AD1816A_3D_PHAT_CTRL, 0, 15, 0),
};
                                        
int snd_ad1816a_mixer(ad1816a_t *chip)
{
	snd_card_t *card;
	unsigned int idx;
	int err;

	snd_assert(chip != NULL && chip->card != NULL, return -EINVAL);

	card = chip->card;

	strcpy(card->mixername, snd_ad1816a_chip_id(chip));

	for (idx = 0; idx < ARRAY_SIZE(snd_ad1816a_controls); idx++) {
		if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ad1816a_controls[idx], chip))) < 0)
			return err;
	}
	return 0;
}

EXPORT_SYMBOL(snd_ad1816a_create);
EXPORT_SYMBOL(snd_ad1816a_pcm);
EXPORT_SYMBOL(snd_ad1816a_mixer);

static int __init alsa_ad1816a_init(void)
{
	return 0;
}

static void __exit alsa_ad1816a_exit(void)
{
}

module_init(alsa_ad1816a_init)
module_exit(alsa_ad1816a_exit)