summaryrefslogtreecommitdiff
path: root/sound/pci/lx6464es/lx6464es.c
blob: ef9af3f4ace2f6fda837a89e4ea46ff8821fd86c (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
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
/* -*- linux-c -*- *
 *
 * ALSA driver for the digigram lx6464es interface
 *
 * Copyright (c) 2008, 2009 Tim Blechmann <tim@klingt.org>
 *
 *
 * 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/slab.h>

#include <sound/initval.h>
#include <sound/control.h>
#include <sound/info.h>

#include "lx6464es.h"

MODULE_AUTHOR("Tim Blechmann");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("digigram lx6464es");
MODULE_SUPPORTED_DEVICE("{digigram lx6464es{}}");


static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for Digigram LX6464ES interface.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for  Digigram LX6464ES interface.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable/disable specific Digigram LX6464ES soundcards.");

static const char card_name[] = "LX6464ES";


#define PCI_DEVICE_ID_PLX_LX6464ES		PCI_DEVICE_ID_PLX_9056

static DEFINE_PCI_DEVICE_TABLE(snd_lx6464es_ids) = {
	{ PCI_DEVICE(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_LX6464ES),
	  .subvendor = PCI_VENDOR_ID_DIGIGRAM,
	  .subdevice = PCI_SUBDEVICE_ID_DIGIGRAM_LX6464ES_SERIAL_SUBSYSTEM
	},			/* LX6464ES */
	{ PCI_DEVICE(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_LX6464ES),
	  .subvendor = PCI_VENDOR_ID_DIGIGRAM,
	  .subdevice = PCI_SUBDEVICE_ID_DIGIGRAM_LX6464ES_CAE_SERIAL_SUBSYSTEM
	},			/* LX6464ES-CAE */
	{ 0, },
};

MODULE_DEVICE_TABLE(pci, snd_lx6464es_ids);



/* PGO pour USERo dans le registre pci_0x06/loc_0xEC */
#define CHIPSC_RESET_XILINX (1L<<16)


/* alsa callbacks */
static struct snd_pcm_hardware lx_caps = {
	.info             = (SNDRV_PCM_INFO_MMAP |
			     SNDRV_PCM_INFO_INTERLEAVED |
			     SNDRV_PCM_INFO_MMAP_VALID |
			     SNDRV_PCM_INFO_SYNC_START),
	.formats	  = (SNDRV_PCM_FMTBIT_S16_LE |
			     SNDRV_PCM_FMTBIT_S16_BE |
			     SNDRV_PCM_FMTBIT_S24_3LE |
			     SNDRV_PCM_FMTBIT_S24_3BE),
	.rates            = (SNDRV_PCM_RATE_CONTINUOUS |
			     SNDRV_PCM_RATE_8000_192000),
	.rate_min         = 8000,
	.rate_max         = 192000,
	.channels_min     = 2,
	.channels_max     = 64,
	.buffer_bytes_max = 64*2*3*MICROBLAZE_IBL_MAX*MAX_STREAM_BUFFER,
	.period_bytes_min = (2*2*MICROBLAZE_IBL_MIN*2),
	.period_bytes_max = (4*64*MICROBLAZE_IBL_MAX*MAX_STREAM_BUFFER),
	.periods_min      = 2,
	.periods_max      = MAX_STREAM_BUFFER,
};

static int lx_set_granularity(struct lx6464es *chip, u32 gran);


static int lx_hardware_open(struct lx6464es *chip,
			    struct snd_pcm_substream *substream)
{
	int err = 0;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int channels = runtime->channels;
	int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);

	snd_pcm_uframes_t period_size = runtime->period_size;

	snd_printd(LXP "allocating pipe for %d channels\n", channels);
	err = lx_pipe_allocate(chip, 0, is_capture, channels);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "allocating pipe failed\n");
		return err;
	}

	err = lx_set_granularity(chip, period_size);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "setting granularity to %ld failed\n",
			   period_size);
		return err;
	}

	return 0;
}

static int lx_hardware_start(struct lx6464es *chip,
			     struct snd_pcm_substream *substream)
{
	int err = 0;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);

	snd_printd(LXP "setting stream format\n");
	err = lx_stream_set_format(chip, runtime, 0, is_capture);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "setting stream format failed\n");
		return err;
	}

	snd_printd(LXP "starting pipe\n");
	err = lx_pipe_start(chip, 0, is_capture);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "starting pipe failed\n");
		return err;
	}

	snd_printd(LXP "waiting for pipe to start\n");
	err = lx_pipe_wait_for_start(chip, 0, is_capture);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "waiting for pipe failed\n");
		return err;
	}

	return err;
}


static int lx_hardware_stop(struct lx6464es *chip,
			    struct snd_pcm_substream *substream)
{
	int err = 0;
	int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);

	snd_printd(LXP "pausing pipe\n");
	err = lx_pipe_pause(chip, 0, is_capture);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "pausing pipe failed\n");
		return err;
	}

	snd_printd(LXP "waiting for pipe to become idle\n");
	err = lx_pipe_wait_for_idle(chip, 0, is_capture);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "waiting for pipe failed\n");
		return err;
	}

	snd_printd(LXP "stopping pipe\n");
	err = lx_pipe_stop(chip, 0, is_capture);
	if (err < 0) {
		snd_printk(LXP "stopping pipe failed\n");
		return err;
	}

	return err;
}


static int lx_hardware_close(struct lx6464es *chip,
			     struct snd_pcm_substream *substream)
{
	int err = 0;
	int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);

	snd_printd(LXP "releasing pipe\n");
	err = lx_pipe_release(chip, 0, is_capture);
	if (err < 0) {
		snd_printk(LXP "releasing pipe failed\n");
		return err;
	}

	return err;
}


static int lx_pcm_open(struct snd_pcm_substream *substream)
{
	struct lx6464es *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err = 0;
	int board_rate;

	snd_printdd("->lx_pcm_open\n");
	mutex_lock(&chip->setup_mutex);

	/* copy the struct snd_pcm_hardware struct */
	runtime->hw = lx_caps;

#if 0
	/* buffer-size should better be multiple of period-size */
	err = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);
	if (err < 0) {
		snd_printk(KERN_WARNING LXP "could not constrain periods\n");
		goto exit;
	}
#endif

	/* the clock rate cannot be changed */
	board_rate = chip->board_sample_rate;
	err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
					   board_rate, board_rate);

	if (err < 0) {
		snd_printk(KERN_WARNING LXP "could not constrain periods\n");
		goto exit;
	}

	/* constrain period size */
	err = snd_pcm_hw_constraint_minmax(runtime,
					   SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
					   MICROBLAZE_IBL_MIN,
					   MICROBLAZE_IBL_MAX);
	if (err < 0) {
		snd_printk(KERN_WARNING LXP
			   "could not constrain period size\n");
		goto exit;
	}

	snd_pcm_hw_constraint_step(runtime, 0,
				   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 32);

	snd_pcm_set_sync(substream);
	err = 0;

exit:
	runtime->private_data = chip;

	mutex_unlock(&chip->setup_mutex);
	snd_printdd("<-lx_pcm_open, %d\n", err);
	return err;
}

static int lx_pcm_close(struct snd_pcm_substream *substream)
{
	int err = 0;
	snd_printdd("->lx_pcm_close\n");
	return err;
}

static snd_pcm_uframes_t lx_pcm_stream_pointer(struct snd_pcm_substream
					       *substream)
{
	struct lx6464es *chip = snd_pcm_substream_chip(substream);
	snd_pcm_uframes_t pos;
	unsigned long flags;
	int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);

	struct lx_stream *lx_stream = is_capture ? &chip->capture_stream :
		&chip->playback_stream;

	snd_printdd("->lx_pcm_stream_pointer\n");

	spin_lock_irqsave(&chip->lock, flags);
	pos = lx_stream->frame_pos * substream->runtime->period_size;
	spin_unlock_irqrestore(&chip->lock, flags);

	snd_printdd(LXP "stream_pointer at %ld\n", pos);
	return pos;
}

static int lx_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct lx6464es *chip = snd_pcm_substream_chip(substream);
	int err = 0;
	const int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);

	snd_printdd("->lx_pcm_prepare\n");

	mutex_lock(&chip->setup_mutex);

	if (chip->hardware_running[is_capture]) {
		err = lx_hardware_stop(chip, substream);
		if (err < 0) {
			snd_printk(KERN_ERR LXP "failed to stop hardware. "
				   "Error code %d\n", err);
			goto exit;
		}

		err = lx_hardware_close(chip, substream);
		if (err < 0) {
			snd_printk(KERN_ERR LXP "failed to close hardware. "
				   "Error code %d\n", err);
			goto exit;
		}
	}

	snd_printd(LXP "opening hardware\n");
	err = lx_hardware_open(chip, substream);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "failed to open hardware. "
			   "Error code %d\n", err);
		goto exit;
	}

	err = lx_hardware_start(chip, substream);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "failed to start hardware. "
			   "Error code %d\n", err);
		goto exit;
	}

	chip->hardware_running[is_capture] = 1;

	if (chip->board_sample_rate != substream->runtime->rate) {
		if (!err)
			chip->board_sample_rate = substream->runtime->rate;
	}

exit:
	mutex_unlock(&chip->setup_mutex);
	return err;
}

static int lx_pcm_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *hw_params, int is_capture)
{
	struct lx6464es *chip = snd_pcm_substream_chip(substream);
	int err = 0;

	snd_printdd("->lx_pcm_hw_params\n");

	mutex_lock(&chip->setup_mutex);

	/* set dma buffer */
	err = snd_pcm_lib_malloc_pages(substream,
				       params_buffer_bytes(hw_params));

	if (is_capture)
		chip->capture_stream.stream = substream;
	else
		chip->playback_stream.stream = substream;

	mutex_unlock(&chip->setup_mutex);
	return err;
}

static int lx_pcm_hw_params_playback(struct snd_pcm_substream *substream,
				 struct snd_pcm_hw_params *hw_params)
{
	return lx_pcm_hw_params(substream, hw_params, 0);
}

static int lx_pcm_hw_params_capture(struct snd_pcm_substream *substream,
				 struct snd_pcm_hw_params *hw_params)
{
	return lx_pcm_hw_params(substream, hw_params, 1);
}

static int lx_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct lx6464es *chip = snd_pcm_substream_chip(substream);
	int err = 0;
	int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);

	snd_printdd("->lx_pcm_hw_free\n");
	mutex_lock(&chip->setup_mutex);

	if (chip->hardware_running[is_capture]) {
		err = lx_hardware_stop(chip, substream);
		if (err < 0) {
			snd_printk(KERN_ERR LXP "failed to stop hardware. "
				   "Error code %d\n", err);
			goto exit;
		}

		err = lx_hardware_close(chip, substream);
		if (err < 0) {
			snd_printk(KERN_ERR LXP "failed to close hardware. "
				   "Error code %d\n", err);
			goto exit;
		}

		chip->hardware_running[is_capture] = 0;
	}

	err = snd_pcm_lib_free_pages(substream);

	if (is_capture)
		chip->capture_stream.stream = 0;
	else
		chip->playback_stream.stream = 0;

exit:
	mutex_unlock(&chip->setup_mutex);
	return err;
}

static void lx_trigger_start(struct lx6464es *chip, struct lx_stream *lx_stream)
{
	struct snd_pcm_substream *substream = lx_stream->stream;
	const int is_capture = lx_stream->is_capture;

	int err;

	const u32 channels = substream->runtime->channels;
	const u32 bytes_per_frame = channels * 3;
	const u32 period_size = substream->runtime->period_size;
	const u32 periods = substream->runtime->periods;
	const u32 period_bytes = period_size * bytes_per_frame;

	dma_addr_t buf = substream->dma_buffer.addr;
	int i;

	u32 needed, freed;
	u32 size_array[5];

	for (i = 0; i != periods; ++i) {
		u32 buffer_index = 0;

		err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed,
				    size_array);
		snd_printdd(LXP "starting: needed %d, freed %d\n",
			    needed, freed);

		err = lx_buffer_give(chip, 0, is_capture, period_bytes,
				     lower_32_bits(buf), upper_32_bits(buf),
				     &buffer_index);

		snd_printdd(LXP "starting: buffer index %x on %p (%d bytes)\n",
			    buffer_index, (void *)buf, period_bytes);
		buf += period_bytes;
	}

	err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, size_array);
	snd_printdd(LXP "starting: needed %d, freed %d\n", needed, freed);

	snd_printd(LXP "starting: starting stream\n");
	err = lx_stream_start(chip, 0, is_capture);
	if (err < 0)
		snd_printk(KERN_ERR LXP "couldn't start stream\n");
	else
		lx_stream->status = LX_STREAM_STATUS_RUNNING;

	lx_stream->frame_pos = 0;
}

static void lx_trigger_stop(struct lx6464es *chip, struct lx_stream *lx_stream)
{
	const int is_capture = lx_stream->is_capture;
	int err;

	snd_printd(LXP "stopping: stopping stream\n");
	err = lx_stream_stop(chip, 0, is_capture);
	if (err < 0)
		snd_printk(KERN_ERR LXP "couldn't stop stream\n");
	else
		lx_stream->status = LX_STREAM_STATUS_FREE;

}

static void lx_trigger_tasklet_dispatch_stream(struct lx6464es *chip,
					       struct lx_stream *lx_stream)
{
	switch (lx_stream->status) {
	case LX_STREAM_STATUS_SCHEDULE_RUN:
		lx_trigger_start(chip, lx_stream);
		break;

	case LX_STREAM_STATUS_SCHEDULE_STOP:
		lx_trigger_stop(chip, lx_stream);
		break;

	default:
		break;
	}
}

static void lx_trigger_tasklet(unsigned long data)
{
	struct lx6464es *chip = (struct lx6464es *)data;
	unsigned long flags;

	snd_printdd("->lx_trigger_tasklet\n");

	spin_lock_irqsave(&chip->lock, flags);
	lx_trigger_tasklet_dispatch_stream(chip, &chip->capture_stream);
	lx_trigger_tasklet_dispatch_stream(chip, &chip->playback_stream);
	spin_unlock_irqrestore(&chip->lock, flags);
}

static int lx_pcm_trigger_dispatch(struct lx6464es *chip,
				   struct lx_stream *lx_stream, int cmd)
{
	int err = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		lx_stream->status = LX_STREAM_STATUS_SCHEDULE_RUN;
		break;

	case SNDRV_PCM_TRIGGER_STOP:
		lx_stream->status = LX_STREAM_STATUS_SCHEDULE_STOP;
		break;

	default:
		err = -EINVAL;
		goto exit;
	}
	tasklet_schedule(&chip->trigger_tasklet);

exit:
	return err;
}


static int lx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct lx6464es *chip = snd_pcm_substream_chip(substream);
	const int is_capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
	struct lx_stream *stream = is_capture ? &chip->capture_stream :
		&chip->playback_stream;

	snd_printdd("->lx_pcm_trigger\n");

	return lx_pcm_trigger_dispatch(chip, stream, cmd);
}

static int snd_lx6464es_free(struct lx6464es *chip)
{
	snd_printdd("->snd_lx6464es_free\n");

	lx_irq_disable(chip);

	if (chip->irq >= 0)
		free_irq(chip->irq, chip);

	iounmap(chip->port_dsp_bar);
	ioport_unmap(chip->port_plx_remapped);

	pci_release_regions(chip->pci);
	pci_disable_device(chip->pci);

	kfree(chip);

	return 0;
}

static int snd_lx6464es_dev_free(struct snd_device *device)
{
	return snd_lx6464es_free(device->device_data);
}

/* reset the dsp during initialization */
static int __devinit lx_init_xilinx_reset(struct lx6464es *chip)
{
	int i;
	u32 plx_reg = lx_plx_reg_read(chip, ePLX_CHIPSC);

	snd_printdd("->lx_init_xilinx_reset\n");

	/* activate reset of xilinx */
	plx_reg &= ~CHIPSC_RESET_XILINX;

	lx_plx_reg_write(chip, ePLX_CHIPSC, plx_reg);
	msleep(1);

	lx_plx_reg_write(chip, ePLX_MBOX3, 0);
	msleep(1);

	plx_reg |= CHIPSC_RESET_XILINX;
	lx_plx_reg_write(chip, ePLX_CHIPSC, plx_reg);

	/* deactivate reset of xilinx */
	for (i = 0; i != 100; ++i) {
		u32 reg_mbox3;
		msleep(10);
		reg_mbox3 = lx_plx_reg_read(chip, ePLX_MBOX3);
		if (reg_mbox3) {
			snd_printd(LXP "xilinx reset done\n");
			snd_printdd(LXP "xilinx took %d loops\n", i);
			break;
		}
	}

	/* todo: add some error handling? */

	/* clear mr */
	lx_dsp_reg_write(chip, eReg_CSM, 0);

	/* le xilinx ES peut ne pas etre encore pret, on attend. */
	msleep(600);

	return 0;
}

static int __devinit lx_init_xilinx_test(struct lx6464es *chip)
{
	u32 reg;

	snd_printdd("->lx_init_xilinx_test\n");

	/* TEST if we have access to Xilinx/MicroBlaze */
	lx_dsp_reg_write(chip, eReg_CSM, 0);

	reg = lx_dsp_reg_read(chip, eReg_CSM);

	if (reg) {
		snd_printk(KERN_ERR LXP "Problem: Reg_CSM %x.\n", reg);

		/* PCI9056_SPACE0_REMAP */
		lx_plx_reg_write(chip, ePLX_PCICR, 1);

		reg = lx_dsp_reg_read(chip, eReg_CSM);
		if (reg) {
			snd_printk(KERN_ERR LXP "Error: Reg_CSM %x.\n", reg);
			return -EAGAIN; /* seems to be appropriate */
		}
	}

	snd_printd(LXP "Xilinx/MicroBlaze access test successful\n");

	return 0;
}

/* initialize ethersound */
static int __devinit lx_init_ethersound_config(struct lx6464es *chip)
{
	int i;
	u32 orig_conf_es = lx_dsp_reg_read(chip, eReg_CONFES);

	/* configure 64 io channels */
	u32 conf_es = (orig_conf_es & CONFES_READ_PART_MASK) |
		(64 << IOCR_INPUTS_OFFSET) |
		(64 << IOCR_OUTPUTS_OFFSET) |
		(FREQ_RATIO_SINGLE_MODE << FREQ_RATIO_OFFSET);

	snd_printdd("->lx_init_ethersound\n");

	chip->freq_ratio = FREQ_RATIO_SINGLE_MODE;

	/*
	 * write it to the card !
	 * this actually kicks the ES xilinx, the first time since poweron.
	 * the MAC address in the Reg_ADMACESMSB Reg_ADMACESLSB registers
	 * is not ready before this is done, and the bit 2 in Reg_CSES is set.
	 * */
	lx_dsp_reg_write(chip, eReg_CONFES, conf_es);

	for (i = 0; i != 1000; ++i) {
		if (lx_dsp_reg_read(chip, eReg_CSES) & 4) {
			snd_printd(LXP "ethersound initialized after %dms\n",
				   i);
			goto ethersound_initialized;
		}
		msleep(1);
	}
	snd_printk(KERN_WARNING LXP
		   "ethersound could not be initialized after %dms\n", i);
	return -ETIMEDOUT;

 ethersound_initialized:
	snd_printd(LXP "ethersound initialized\n");
	return 0;
}

static int __devinit lx_init_get_version_features(struct lx6464es *chip)
{
	u32 dsp_version;

	int err;

	snd_printdd("->lx_init_get_version_features\n");

	err = lx_dsp_get_version(chip, &dsp_version);

	if (err == 0) {
		u32 freq;

		snd_printk(LXP "DSP version: V%02d.%02d #%d\n",
			   (dsp_version>>16) & 0xff, (dsp_version>>8) & 0xff,
			   dsp_version & 0xff);

		/* later: what firmware version do we expect? */

		/* retrieve Play/Rec features */
		/* done here because we may have to handle alternate
		 * DSP files. */
		/* later */

		/* init the EtherSound sample rate */
		err = lx_dsp_get_clock_frequency(chip, &freq);
		if (err == 0)
			chip->board_sample_rate = freq;
		snd_printd(LXP "actual clock frequency %d\n", freq);
	} else {
		snd_printk(KERN_ERR LXP "DSP corrupted \n");
		err = -EAGAIN;
	}

	return err;
}

static int lx_set_granularity(struct lx6464es *chip, u32 gran)
{
	int err = 0;
	u32 snapped_gran = MICROBLAZE_IBL_MIN;

	snd_printdd("->lx_set_granularity\n");

	/* blocksize is a power of 2 */
	while ((snapped_gran < gran) &&
	       (snapped_gran < MICROBLAZE_IBL_MAX)) {
		snapped_gran *= 2;
	}

	if (snapped_gran == chip->pcm_granularity)
		return 0;

	err = lx_dsp_set_granularity(chip, snapped_gran);
	if (err < 0) {
		snd_printk(KERN_WARNING LXP "could not set granularity\n");
		err = -EAGAIN;
	}

	if (snapped_gran != gran)
		snd_printk(LXP "snapped blocksize to %d\n", snapped_gran);

	snd_printd(LXP "set blocksize on board %d\n", snapped_gran);
	chip->pcm_granularity = snapped_gran;

	return err;
}

/* initialize and test the xilinx dsp chip */
static int __devinit lx_init_dsp(struct lx6464es *chip)
{
	int err;
	u8 mac_address[6];
	int i;

	snd_printdd("->lx_init_dsp\n");

	snd_printd(LXP "initialize board\n");
	err = lx_init_xilinx_reset(chip);
	if (err)
		return err;

	snd_printd(LXP "testing board\n");
	err = lx_init_xilinx_test(chip);
	if (err)
		return err;

	snd_printd(LXP "initialize ethersound configuration\n");
	err = lx_init_ethersound_config(chip);
	if (err)
		return err;

	lx_irq_enable(chip);

	/** \todo the mac address should be ready by not, but it isn't,
	 *  so we wait for it */
	for (i = 0; i != 1000; ++i) {
		err = lx_dsp_get_mac(chip, mac_address);
		if (err)
			return err;
		if (mac_address[0] || mac_address[1] || mac_address[2] ||
		    mac_address[3] || mac_address[4] || mac_address[5])
			goto mac_ready;
		msleep(1);
	}
	return -ETIMEDOUT;

mac_ready:
	snd_printd(LXP "mac address ready read after: %dms\n", i);
	snd_printk(LXP "mac address: %02X.%02X.%02X.%02X.%02X.%02X\n",
		   mac_address[0], mac_address[1], mac_address[2],
		   mac_address[3], mac_address[4], mac_address[5]);

	err = lx_init_get_version_features(chip);
	if (err)
		return err;

	lx_set_granularity(chip, MICROBLAZE_IBL_DEFAULT);

	chip->playback_mute = 0;

	return err;
}

static struct snd_pcm_ops lx_ops_playback = {
	.open      = lx_pcm_open,
	.close     = lx_pcm_close,
	.ioctl     = snd_pcm_lib_ioctl,
	.prepare   = lx_pcm_prepare,
	.hw_params = lx_pcm_hw_params_playback,
	.hw_free   = lx_pcm_hw_free,
	.trigger   = lx_pcm_trigger,
	.pointer   = lx_pcm_stream_pointer,
};

static struct snd_pcm_ops lx_ops_capture = {
	.open      = lx_pcm_open,
	.close     = lx_pcm_close,
	.ioctl     = snd_pcm_lib_ioctl,
	.prepare   = lx_pcm_prepare,
	.hw_params = lx_pcm_hw_params_capture,
	.hw_free   = lx_pcm_hw_free,
	.trigger   = lx_pcm_trigger,
	.pointer   = lx_pcm_stream_pointer,
};

static int __devinit lx_pcm_create(struct lx6464es *chip)
{
	int err;
	struct snd_pcm *pcm;

	u32 size = 64 *		     /* channels */
		3 *		     /* 24 bit samples */
		MAX_STREAM_BUFFER *  /* periods */
		MICROBLAZE_IBL_MAX * /* frames per period */
		2;		     /* duplex */

	size = PAGE_ALIGN(size);

	/* hardcoded device name & channel count */
	err = snd_pcm_new(chip->card, (char *)card_name, 0,
			  1, 1, &pcm);

	pcm->private_data = chip;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &lx_ops_playback);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &lx_ops_capture);

	pcm->info_flags = 0;
	strcpy(pcm->name, card_name);

	err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
						    snd_dma_pci_data(chip->pci),
						    size, size);
	if (err < 0)
		return err;

	chip->pcm = pcm;
	chip->capture_stream.is_capture = 1;

	return 0;
}

static int lx_control_playback_info(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int lx_control_playback_get(struct snd_kcontrol *kcontrol,
				   struct snd_ctl_elem_value *ucontrol)
{
	struct lx6464es *chip = snd_kcontrol_chip(kcontrol);
	ucontrol->value.integer.value[0] = chip->playback_mute;
	return 0;
}

static int lx_control_playback_put(struct snd_kcontrol *kcontrol,
				   struct snd_ctl_elem_value *ucontrol)
{
	struct lx6464es *chip = snd_kcontrol_chip(kcontrol);
	int changed = 0;
	int current_value = chip->playback_mute;

	if (current_value != ucontrol->value.integer.value[0]) {
		lx_level_unmute(chip, 0, !current_value);
		chip->playback_mute = !current_value;
		changed = 1;
	}
	return changed;
}

static struct snd_kcontrol_new lx_control_playback_switch __devinitdata = {
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "PCM Playback Switch",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 0,
	.info = lx_control_playback_info,
	.get = lx_control_playback_get,
	.put = lx_control_playback_put
};



static void lx_proc_levels_read(struct snd_info_entry *entry,
				struct snd_info_buffer *buffer)
{
	u32 levels[64];
	int err;
	int i, j;
	struct lx6464es *chip = entry->private_data;

	snd_iprintf(buffer, "capture levels:\n");
	err = lx_level_peaks(chip, 1, 64, levels);
	if (err < 0)
		return;

	for (i = 0; i != 8; ++i) {
		for (j = 0; j != 8; ++j)
			snd_iprintf(buffer, "%08x ", levels[i*8+j]);
		snd_iprintf(buffer, "\n");
	}

	snd_iprintf(buffer, "\nplayback levels:\n");

	err = lx_level_peaks(chip, 0, 64, levels);
	if (err < 0)
		return;

	for (i = 0; i != 8; ++i) {
		for (j = 0; j != 8; ++j)
			snd_iprintf(buffer, "%08x ", levels[i*8+j]);
		snd_iprintf(buffer, "\n");
	}

	snd_iprintf(buffer, "\n");
}

static int __devinit lx_proc_create(struct snd_card *card, struct lx6464es *chip)
{
	struct snd_info_entry *entry;
	int err = snd_card_proc_new(card, "levels", &entry);
	if (err < 0)
		return err;

	snd_info_set_text_ops(entry, chip, lx_proc_levels_read);
	return 0;
}


static int __devinit snd_lx6464es_create(struct snd_card *card,
					 struct pci_dev *pci,
					 struct lx6464es **rchip)
{
	struct lx6464es *chip;
	int err;

	static struct snd_device_ops ops = {
		.dev_free = snd_lx6464es_dev_free,
	};

	snd_printdd("->snd_lx6464es_create\n");

	*rchip = NULL;

	/* enable PCI device */
	err = pci_enable_device(pci);
	if (err < 0)
		return err;

	pci_set_master(pci);

	/* check if we can restrict PCI DMA transfers to 32 bits */
	err = pci_set_dma_mask(pci, DMA_BIT_MASK(32));
	if (err < 0) {
		snd_printk(KERN_ERR "architecture does not support "
			   "32bit PCI busmaster DMA\n");
		pci_disable_device(pci);
		return -ENXIO;
	}

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL) {
		err = -ENOMEM;
		goto alloc_failed;
	}

	chip->card = card;
	chip->pci = pci;
	chip->irq = -1;

	/* initialize synchronization structs */
	spin_lock_init(&chip->lock);
	spin_lock_init(&chip->msg_lock);
	mutex_init(&chip->setup_mutex);
	tasklet_init(&chip->trigger_tasklet, lx_trigger_tasklet,
		     (unsigned long)chip);
	tasklet_init(&chip->tasklet_capture, lx_tasklet_capture,
		     (unsigned long)chip);
	tasklet_init(&chip->tasklet_playback, lx_tasklet_playback,
		     (unsigned long)chip);

	/* request resources */
	err = pci_request_regions(pci, card_name);
	if (err < 0)
		goto request_regions_failed;

	/* plx port */
	chip->port_plx = pci_resource_start(pci, 1);
	chip->port_plx_remapped = ioport_map(chip->port_plx,
					     pci_resource_len(pci, 1));

	/* dsp port */
	chip->port_dsp_bar = pci_ioremap_bar(pci, 2);

	err = request_irq(pci->irq, lx_interrupt, IRQF_SHARED,
			  card_name, chip);
	if (err) {
		snd_printk(KERN_ERR LXP "unable to grab IRQ %d\n", pci->irq);
		goto request_irq_failed;
	}
	chip->irq = pci->irq;

	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
	if (err < 0)
		goto device_new_failed;

	err = lx_init_dsp(chip);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "error during DSP initialization\n");
		return err;
	}

	err = lx_pcm_create(chip);
	if (err < 0)
		return err;

	err = lx_proc_create(card, chip);
	if (err < 0)
		return err;

	err = snd_ctl_add(card, snd_ctl_new1(&lx_control_playback_switch,
					     chip));
	if (err < 0)
		return err;

	snd_card_set_dev(card, &pci->dev);

	*rchip = chip;
	return 0;

device_new_failed:
	free_irq(pci->irq, chip);

request_irq_failed:
	pci_release_regions(pci);

request_regions_failed:
	kfree(chip);

alloc_failed:
	pci_disable_device(pci);

	return err;
}

static int __devinit snd_lx6464es_probe(struct pci_dev *pci,
					const struct pci_device_id *pci_id)
{
	static int dev;
	struct snd_card *card;
	struct lx6464es *chip;
	int err;

	snd_printdd("->snd_lx6464es_probe\n");

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

	err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
	if (err < 0)
		return err;

	err = snd_lx6464es_create(card, pci, &chip);
	if (err < 0) {
		snd_printk(KERN_ERR LXP "error during snd_lx6464es_create\n");
		goto out_free;
	}

	strcpy(card->driver, "lx6464es");
	strcpy(card->shortname, "Digigram LX6464ES");
	sprintf(card->longname, "%s at 0x%lx, 0x%p, irq %i",
		card->shortname, chip->port_plx,
		chip->port_dsp_bar, chip->irq);

	err = snd_card_register(card);
	if (err < 0)
		goto out_free;

	snd_printdd(LXP "initialization successful\n");
	pci_set_drvdata(pci, card);
	dev++;
	return 0;

out_free:
	snd_card_free(card);
	return err;

}

static void __devexit snd_lx6464es_remove(struct pci_dev *pci)
{
	snd_card_free(pci_get_drvdata(pci));
	pci_set_drvdata(pci, NULL);
}


static struct pci_driver driver = {
	.name =     "Digigram LX6464ES",
	.id_table = snd_lx6464es_ids,
	.probe =    snd_lx6464es_probe,
	.remove = __devexit_p(snd_lx6464es_remove),
};


/* module initialization */
static int __init mod_init(void)
{
	return pci_register_driver(&driver);
}

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

module_init(mod_init);
module_exit(mod_exit);