forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
at73c213.c
1128 lines (924 loc) · 27.5 KB
/
at73c213.c
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
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
*
* Copyright (C) 2006-2007 Atmel Norway
*/
/*#define DEBUG*/
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <sound/initval.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <linux/atmel-ssc.h>
#include <linux/spi/spi.h>
#include <linux/spi/at73c213.h>
#include "at73c213.h"
#define BITRATE_MIN 8000 /* Hardware limit? */
#define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE
#define BITRATE_MAX 50000 /* Hardware limit. */
/* Initial (hardware reset) AT73C213 register values. */
static u8 snd_at73c213_original_image[18] =
{
0x00, /* 00 - CTRL */
0x05, /* 01 - LLIG */
0x05, /* 02 - RLIG */
0x08, /* 03 - LPMG */
0x08, /* 04 - RPMG */
0x00, /* 05 - LLOG */
0x00, /* 06 - RLOG */
0x22, /* 07 - OLC */
0x09, /* 08 - MC */
0x00, /* 09 - CSFC */
0x00, /* 0A - MISC */
0x00, /* 0B - */
0x00, /* 0C - PRECH */
0x05, /* 0D - AUXG */
0x00, /* 0E - */
0x00, /* 0F - */
0x00, /* 10 - RST */
0x00, /* 11 - PA_CTRL */
};
struct snd_at73c213 {
struct snd_card *card;
struct snd_pcm *pcm;
struct snd_pcm_substream *substream;
struct at73c213_board_info *board;
int irq;
int period;
unsigned long bitrate;
struct ssc_device *ssc;
struct spi_device *spi;
u8 spi_wbuffer[2];
u8 spi_rbuffer[2];
/* Image of the SPI registers in AT73C213. */
u8 reg_image[18];
/* Protect SSC registers against concurrent access. */
spinlock_t lock;
/* Protect mixer registers against concurrent access. */
struct mutex mixer_lock;
};
#define get_chip(card) ((struct snd_at73c213 *)card->private_data)
static int
snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
{
struct spi_message msg;
struct spi_transfer msg_xfer = {
.len = 2,
.cs_change = 0,
};
int retval;
spi_message_init(&msg);
chip->spi_wbuffer[0] = reg;
chip->spi_wbuffer[1] = val;
msg_xfer.tx_buf = chip->spi_wbuffer;
msg_xfer.rx_buf = chip->spi_rbuffer;
spi_message_add_tail(&msg_xfer, &msg);
retval = spi_sync(chip->spi, &msg);
if (!retval)
chip->reg_image[reg] = val;
return retval;
}
static struct snd_pcm_hardware snd_at73c213_playback_hw = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER,
.formats = SNDRV_PCM_FMTBIT_S16_BE,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 8000, /* Replaced by chip->bitrate later. */
.rate_max = 50000, /* Replaced by chip->bitrate later. */
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = 64 * 1024 - 1,
.period_bytes_min = 512,
.period_bytes_max = 64 * 1024 - 1,
.periods_min = 4,
.periods_max = 1024,
};
/*
* Calculate and set bitrate and divisions.
*/
static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
{
unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
unsigned long dac_rate_new, ssc_div;
int status;
unsigned long ssc_div_max, ssc_div_min;
int max_tries;
/*
* We connect two clocks here, picking divisors so the I2S clocks
* out data at the same rate the DAC clocks it in ... and as close
* as practical to the desired target rate.
*
* The DAC master clock (MCLK) is programmable, and is either 256
* or (not here) 384 times the I2S output clock (BCLK).
*/
/* SSC clock / (bitrate * stereo * 16-bit). */
ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16);
ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16);
ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16);
max_tries = (ssc_div_max - ssc_div_min) / 2;
if (max_tries < 1)
max_tries = 1;
/* ssc_div must be even. */
ssc_div = (ssc_div + 1) & ~1UL;
if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) {
ssc_div -= 2;
if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX)
return -ENXIO;
}
/* Search for a possible bitrate. */
do {
/* SSC clock / (ssc divider * 16-bit * stereo). */
if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN)
return -ENXIO;
/* 256 / (2 * 16) = 8 */
dac_rate_new = 8 * (ssc_rate / ssc_div);
status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
if (status <= 0)
return status;
/* Ignore difference smaller than 256 Hz. */
if ((status/256) == (dac_rate_new/256))
goto set_rate;
ssc_div += 2;
} while (--max_tries);
/* Not able to find a valid bitrate. */
return -ENXIO;
set_rate:
status = clk_set_rate(chip->board->dac_clk, status);
if (status < 0)
return status;
/* Set divider in SSC device. */
ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
/* SSC clock / (ssc divider * 16-bit * stereo). */
chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
dev_info(&chip->spi->dev,
"at73c213: supported bitrate is %lu (%lu divider)\n",
chip->bitrate, ssc_div);
return 0;
}
static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
/* ensure buffer_size is a multiple of period_size */
err = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (err < 0)
return err;
snd_at73c213_playback_hw.rate_min = chip->bitrate;
snd_at73c213_playback_hw.rate_max = chip->bitrate;
runtime->hw = snd_at73c213_playback_hw;
chip->substream = substream;
clk_enable(chip->ssc->clk);
return 0;
}
static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
{
struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
chip->substream = NULL;
clk_disable(chip->ssc->clk);
return 0;
}
static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
int channels = params_channels(hw_params);
int val;
val = ssc_readl(chip->ssc->regs, TFMR);
val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
ssc_writel(chip->ssc->regs, TFMR, val);
return snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
}
static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int block_size;
block_size = frames_to_bytes(runtime, runtime->period_size);
chip->period = 0;
ssc_writel(chip->ssc->regs, PDC_TPR,
(long)runtime->dma_addr);
ssc_writel(chip->ssc->regs, PDC_TCR,
runtime->period_size * runtime->channels);
ssc_writel(chip->ssc->regs, PDC_TNPR,
(long)runtime->dma_addr + block_size);
ssc_writel(chip->ssc->regs, PDC_TNCR,
runtime->period_size * runtime->channels);
return 0;
}
static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
int retval = 0;
spin_lock(&chip->lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
break;
case SNDRV_PCM_TRIGGER_STOP:
ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
break;
default:
dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
retval = -EINVAL;
break;
}
spin_unlock(&chip->lock);
return retval;
}
static snd_pcm_uframes_t
snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t pos;
unsigned long bytes;
bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
- (unsigned long)runtime->dma_addr;
pos = bytes_to_frames(runtime, bytes);
if (pos >= runtime->buffer_size)
pos -= runtime->buffer_size;
return pos;
}
static const struct snd_pcm_ops at73c213_playback_ops = {
.open = snd_at73c213_pcm_open,
.close = snd_at73c213_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_at73c213_pcm_hw_params,
.hw_free = snd_at73c213_pcm_hw_free,
.prepare = snd_at73c213_pcm_prepare,
.trigger = snd_at73c213_pcm_trigger,
.pointer = snd_at73c213_pcm_pointer,
};
static int snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
{
struct snd_pcm *pcm;
int retval;
retval = snd_pcm_new(chip->card, chip->card->shortname,
device, 1, 0, &pcm);
if (retval < 0)
goto out;
pcm->private_data = chip;
pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
strcpy(pcm->name, "at73c213");
chip->pcm = pcm;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
64 * 1024, 64 * 1024);
out:
return retval;
}
static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
{
struct snd_at73c213 *chip = dev_id;
struct snd_pcm_runtime *runtime = chip->substream->runtime;
u32 status;
int offset;
int block_size;
int next_period;
int retval = IRQ_NONE;
spin_lock(&chip->lock);
block_size = frames_to_bytes(runtime, runtime->period_size);
status = ssc_readl(chip->ssc->regs, IMR);
if (status & SSC_BIT(IMR_ENDTX)) {
chip->period++;
if (chip->period == runtime->periods)
chip->period = 0;
next_period = chip->period + 1;
if (next_period == runtime->periods)
next_period = 0;
offset = block_size * next_period;
ssc_writel(chip->ssc->regs, PDC_TNPR,
(long)runtime->dma_addr + offset);
ssc_writel(chip->ssc->regs, PDC_TNCR,
runtime->period_size * runtime->channels);
retval = IRQ_HANDLED;
}
ssc_readl(chip->ssc->regs, IMR);
spin_unlock(&chip->lock);
if (status & SSC_BIT(IMR_ENDTX))
snd_pcm_period_elapsed(chip->substream);
return retval;
}
/*
* Mixer functions.
*/
static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
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;
mutex_lock(&chip->mixer_lock);
ucontrol->value.integer.value[0] =
(chip->reg_image[reg] >> shift) & mask;
if (invert)
ucontrol->value.integer.value[0] =
mask - ucontrol->value.integer.value[0];
mutex_unlock(&chip->mixer_lock);
return 0;
}
static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
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, retval;
unsigned short val;
val = (ucontrol->value.integer.value[0] & mask);
if (invert)
val = mask - val;
val <<= shift;
mutex_lock(&chip->mixer_lock);
val = (chip->reg_image[reg] & ~(mask << shift)) | val;
change = val != chip->reg_image[reg];
retval = snd_at73c213_write_reg(chip, reg, val);
mutex_unlock(&chip->mixer_lock);
if (retval)
return retval;
return change;
}
static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
int mask = (kcontrol->private_value >> 24) & 0xff;
if (mask == 1)
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
else
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = mask;
return 0;
}
static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
int left_reg = kcontrol->private_value & 0xff;
int right_reg = (kcontrol->private_value >> 8) & 0xff;
int shift_left = (kcontrol->private_value >> 16) & 0x07;
int shift_right = (kcontrol->private_value >> 19) & 0x07;
int mask = (kcontrol->private_value >> 24) & 0xff;
int invert = (kcontrol->private_value >> 22) & 1;
mutex_lock(&chip->mixer_lock);
ucontrol->value.integer.value[0] =
(chip->reg_image[left_reg] >> shift_left) & mask;
ucontrol->value.integer.value[1] =
(chip->reg_image[right_reg] >> shift_right) & mask;
if (invert) {
ucontrol->value.integer.value[0] =
mask - ucontrol->value.integer.value[0];
ucontrol->value.integer.value[1] =
mask - ucontrol->value.integer.value[1];
}
mutex_unlock(&chip->mixer_lock);
return 0;
}
static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
int left_reg = kcontrol->private_value & 0xff;
int right_reg = (kcontrol->private_value >> 8) & 0xff;
int shift_left = (kcontrol->private_value >> 16) & 0x07;
int shift_right = (kcontrol->private_value >> 19) & 0x07;
int mask = (kcontrol->private_value >> 24) & 0xff;
int invert = (kcontrol->private_value >> 22) & 1;
int change, retval;
unsigned short 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;
mutex_lock(&chip->mixer_lock);
val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
change = val1 != chip->reg_image[left_reg]
|| val2 != chip->reg_image[right_reg];
retval = snd_at73c213_write_reg(chip, left_reg, val1);
if (retval) {
mutex_unlock(&chip->mixer_lock);
goto out;
}
retval = snd_at73c213_write_reg(chip, right_reg, val2);
if (retval) {
mutex_unlock(&chip->mixer_lock);
goto out;
}
mutex_unlock(&chip->mixer_lock);
return change;
out:
return retval;
}
#define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
int reg = kcontrol->private_value & 0xff;
int shift = (kcontrol->private_value >> 8) & 0xff;
int invert = (kcontrol->private_value >> 24) & 0xff;
mutex_lock(&chip->mixer_lock);
ucontrol->value.integer.value[0] =
(chip->reg_image[reg] >> shift) & 0x01;
if (invert)
ucontrol->value.integer.value[0] =
0x01 - ucontrol->value.integer.value[0];
mutex_unlock(&chip->mixer_lock);
return 0;
}
static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
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, retval;
unsigned short val;
if (ucontrol->value.integer.value[0])
val = mask;
else
val = 0;
if (invert)
val = mask - val;
val <<= shift;
mutex_lock(&chip->mixer_lock);
val |= (chip->reg_image[reg] & ~(mask << shift));
change = val != chip->reg_image[reg];
retval = snd_at73c213_write_reg(chip, reg, val);
mutex_unlock(&chip->mixer_lock);
if (retval)
return retval;
return change;
}
static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
return 0;
}
static int snd_at73c213_line_capture_volume_info(
struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
/* When inverted will give values 0x10001 => 0. */
uinfo->value.integer.min = 14;
uinfo->value.integer.max = 31;
return 0;
}
static int snd_at73c213_aux_capture_volume_info(
struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
/* When inverted will give values 0x10001 => 0. */
uinfo->value.integer.min = 14;
uinfo->value.integer.max = 31;
return 0;
}
#define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \
{ \
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.name = xname, \
.index = xindex, \
.info = snd_at73c213_mono_switch_info, \
.get = snd_at73c213_mono_switch_get, \
.put = snd_at73c213_mono_switch_put, \
.private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
}
#define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
{ \
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.name = xname, \
.index = xindex, \
.info = snd_at73c213_stereo_info, \
.get = snd_at73c213_stereo_get, \
.put = snd_at73c213_stereo_put, \
.private_value = (left_reg | (right_reg << 8) \
| (shift_left << 16) | (shift_right << 19) \
| (mask << 24) | (invert << 22)) \
}
static struct snd_kcontrol_new snd_at73c213_controls[] = {
AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
0x01, 0),
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PA Playback Volume",
.index = 0,
.info = snd_at73c213_pa_volume_info,
.get = snd_at73c213_mono_get,
.put = snd_at73c213_mono_put,
.private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
(0x0f << 16) | (1 << 24),
},
AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
0x01, 1),
AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Aux Capture Volume",
.index = 0,
.info = snd_at73c213_aux_capture_volume_info,
.get = snd_at73c213_mono_get,
.put = snd_at73c213_mono_put,
.private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
},
AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
0x01, 0),
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Line Capture Volume",
.index = 0,
.info = snd_at73c213_line_capture_volume_info,
.get = snd_at73c213_stereo_get,
.put = snd_at73c213_stereo_put,
.private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
| (0x1f << 24) | (1 << 22),
},
AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
};
static int snd_at73c213_mixer(struct snd_at73c213 *chip)
{
struct snd_card *card;
int errval, idx;
if (chip == NULL || chip->pcm == NULL)
return -EINVAL;
card = chip->card;
strcpy(card->mixername, chip->pcm->name);
for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
errval = snd_ctl_add(card,
snd_ctl_new1(&snd_at73c213_controls[idx],
chip));
if (errval < 0)
goto cleanup;
}
return 0;
cleanup:
for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) {
struct snd_kcontrol *kctl;
kctl = snd_ctl_find_numid(card, idx);
if (kctl)
snd_ctl_remove(card, kctl);
}
return errval;
}
/*
* Device functions
*/
static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
{
/*
* Continuous clock output.
* Starts on falling TF.
* Delay 1 cycle (1 bit).
* Periode is 16 bit (16 - 1).
*/
ssc_writel(chip->ssc->regs, TCMR,
SSC_BF(TCMR_CKO, 1)
| SSC_BF(TCMR_START, 4)
| SSC_BF(TCMR_STTDLY, 1)
| SSC_BF(TCMR_PERIOD, 16 - 1));
/*
* Data length is 16 bit (16 - 1).
* Transmit MSB first.
* Transmit 2 words each transfer.
* Frame sync length is 16 bit (16 - 1).
* Frame starts on negative pulse.
*/
ssc_writel(chip->ssc->regs, TFMR,
SSC_BF(TFMR_DATLEN, 16 - 1)
| SSC_BIT(TFMR_MSBF)
| SSC_BF(TFMR_DATNB, 1)
| SSC_BF(TFMR_FSLEN, 16 - 1)
| SSC_BF(TFMR_FSOS, 1));
return 0;
}
static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
{
int retval;
unsigned char dac_ctrl = 0;
retval = snd_at73c213_set_bitrate(chip);
if (retval)
goto out;
/* Enable DAC master clock. */
clk_enable(chip->board->dac_clk);
/* Initialize at73c213 on SPI bus. */
retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
if (retval)
goto out_clk;
msleep(1);
retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
if (retval)
goto out_clk;
/* Precharge everything. */
retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
if (retval)
goto out_clk;
retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
if (retval)
goto out_clk;
retval = snd_at73c213_write_reg(chip, DAC_CTRL,
(1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
if (retval)
goto out_clk;
msleep(50);
/* Stop precharging PA. */
retval = snd_at73c213_write_reg(chip, PA_CTRL,
(1<<PA_CTRL_APALP) | 0x0f);
if (retval)
goto out_clk;
msleep(450);
/* Stop precharging DAC, turn on master power. */
retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
if (retval)
goto out_clk;
msleep(1);
/* Turn on DAC. */
dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
| (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
if (retval)
goto out_clk;
/* Mute sound. */
retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
if (retval)
goto out_clk;
retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
if (retval)
goto out_clk;
retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
if (retval)
goto out_clk;
retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
if (retval)
goto out_clk;
retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
if (retval)
goto out_clk;
retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
if (retval)
goto out_clk;
retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
if (retval)
goto out_clk;
/* Enable I2S device, i.e. clock output. */
ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
goto out;
out_clk:
clk_disable(chip->board->dac_clk);
out:
return retval;
}
static int snd_at73c213_dev_free(struct snd_device *device)
{
struct snd_at73c213 *chip = device->device_data;
ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
if (chip->irq >= 0) {
free_irq(chip->irq, chip);
chip->irq = -1;
}
return 0;
}
static int snd_at73c213_dev_init(struct snd_card *card,
struct spi_device *spi)
{
static struct snd_device_ops ops = {
.dev_free = snd_at73c213_dev_free,
};
struct snd_at73c213 *chip = get_chip(card);
int irq, retval;
irq = chip->ssc->irq;
if (irq < 0)
return irq;
spin_lock_init(&chip->lock);
mutex_init(&chip->mixer_lock);
chip->card = card;
chip->irq = -1;
clk_enable(chip->ssc->clk);
retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
if (retval) {
dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
goto out;
}
chip->irq = irq;
memcpy(&chip->reg_image, &snd_at73c213_original_image,
sizeof(snd_at73c213_original_image));
retval = snd_at73c213_ssc_init(chip);
if (retval)
goto out_irq;
retval = snd_at73c213_chip_init(chip);
if (retval)
goto out_irq;
retval = snd_at73c213_pcm_new(chip, 0);
if (retval)
goto out_irq;
retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
if (retval)
goto out_irq;
retval = snd_at73c213_mixer(chip);
if (retval)
goto out_snd_dev;
goto out;
out_snd_dev:
snd_device_free(card, chip);
out_irq:
free_irq(chip->irq, chip);
chip->irq = -1;
out:
clk_disable(chip->ssc->clk);
return retval;
}
static int snd_at73c213_probe(struct spi_device *spi)
{
struct snd_card *card;
struct snd_at73c213 *chip;
struct at73c213_board_info *board;
int retval;
char id[16];
board = spi->dev.platform_data;
if (!board) {
dev_dbg(&spi->dev, "no platform_data\n");
return -ENXIO;
}
if (!board->dac_clk) {
dev_dbg(&spi->dev, "no DAC clk\n");
return -ENXIO;
}
if (IS_ERR(board->dac_clk)) {
dev_dbg(&spi->dev, "no DAC clk\n");
return PTR_ERR(board->dac_clk);
}
/* Allocate "card" using some unused identifiers. */
snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE,
sizeof(struct snd_at73c213), &card);
if (retval < 0)
goto out;
chip = card->private_data;
chip->spi = spi;
chip->board = board;
chip->ssc = ssc_request(board->ssc_id);
if (IS_ERR(chip->ssc)) {
dev_dbg(&spi->dev, "could not get ssc%d device\n",
board->ssc_id);
retval = PTR_ERR(chip->ssc);
goto out_card;
}
retval = snd_at73c213_dev_init(card, spi);
if (retval)
goto out_ssc;
strcpy(card->driver, "at73c213");
strcpy(card->shortname, board->shortname);
sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
retval = snd_card_register(card);
if (retval)
goto out_ssc;
dev_set_drvdata(&spi->dev, card);