summaryrefslogtreecommitdiff
path: root/sound/pci/ca0106/ca0106_main.c
blob: cf84d4453af8df7a4e8f4b881896e7adff03fc2b (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
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
/*
 *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
 *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
 *  Version: 0.0.23
 *
 *  FEATURES currently supported:
 *    Front, Rear and Center/LFE.
 *    Surround40 and Surround51.
 *    Capture from MIC an LINE IN input.
 *    SPDIF digital playback of PCM stereo and AC3/DTS works.
 *    (One can use a standard mono mini-jack to one RCA plugs cable.
 *     or one can use a standard stereo mini-jack to two RCA plugs cable.
 *     Plug one of the RCA plugs into the Coax input of the external decoder/receiver.)
 *    ( In theory one could output 3 different AC3 streams at once, to 3 different SPDIF outputs. )
 *    Notes on how to capture sound:
 *      The AC97 is used in the PLAYBACK direction.
 *      The output from the AC97 chip, instead of reaching the speakers, is fed into the Philips 1361T ADC.
 *      So, to record from the MIC, set the MIC Playback volume to max,
 *      unmute the MIC and turn up the MASTER Playback volume.
 *      So, to prevent feedback when capturing, minimise the "Capture feedback into Playback" volume.
 *   
 *    The only playback controls that currently do anything are: -
 *    Analog Front
 *    Analog Rear
 *    Analog Center/LFE
 *    SPDIF Front
 *    SPDIF Rear
 *    SPDIF Center/LFE
 *   
 *    For capture from Mic in or Line in.
 *    Digital/Analog ( switch must be in Analog mode for CAPTURE. )
 * 
 *    CAPTURE feedback into PLAYBACK
 * 
 *  Changelog:
 *    Support interrupts per period.
 *    Removed noise from Center/LFE channel when in Analog mode.
 *    Rename and remove mixer controls.
 *  0.0.6
 *    Use separate card based DMA buffer for periods table list.
 *  0.0.7
 *    Change remove and rename ctrls into lists.
 *  0.0.8
 *    Try to fix capture sources.
 *  0.0.9
 *    Fix AC3 output.
 *    Enable S32_LE format support.
 *  0.0.10
 *    Enable playback 48000 and 96000 rates. (Rates other that these do not work, even with "plug:front".)
 *  0.0.11
 *    Add Model name recognition.
 *  0.0.12
 *    Correct interrupt timing. interrupt at end of period, instead of in the middle of a playback period.
 *    Remove redundent "voice" handling.
 *  0.0.13
 *    Single trigger call for multi channels.
 *  0.0.14
 *    Set limits based on what the sound card hardware can do.
 *    playback periods_min=2, periods_max=8
 *    capture hw constraints require period_size = n * 64 bytes.
 *    playback hw constraints require period_size = n * 64 bytes.
 *  0.0.15
 *    Minor updates.
 *  0.0.16
 *    Implement 192000 sample rate.
 *  0.0.17
 *    Add support for SB0410 and SB0413.
 *  0.0.18
 *    Modified Copyright message.
 *  0.0.19
 *    Finally fix support for SB Live 24 bit. SB0410 and SB0413.
 *    The output codec needs resetting, otherwise all output is muted.
 *  0.0.20
 *    Merge "pci_disable_device(pci);" fixes.
 *  0.0.21
 *    Add 4 capture channels. (SPDIF only comes in on channel 0. )
 *    Add SPDIF capture using optional digital I/O module for SB Live 24bit. (Analog capture does not yet work.)
 *  0.0.22
 *    Add support for MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97. From kiksen, bug #901
 *  0.0.23
 *    Implement support for Line-in capture on SB Live 24bit.
 *
 *  BUGS:
 *    Some stability problems when unloading the snd-ca0106 kernel module.
 *    --
 *
 *  TODO:
 *    4 Capture channels, only one implemented so far.
 *    Other capture rates apart from 48khz not implemented.
 *    MIDI
 *    --
 *  GENERAL INFO:
 *    Model: SB0310
 *    P17 Chip: CA0106-DAT
 *    AC97 Codec: STAC 9721
 *    ADC: Philips 1361T (Stereo 24bit)
 *    DAC: WM8746EDS (6-channel, 24bit, 192Khz)
 *
 *  GENERAL INFO:
 *    Model: SB0410
 *    P17 Chip: CA0106-DAT
 *    AC97 Codec: None
 *    ADC: WM8775EDS (4 Channel)
 *    DAC: CS4382 (114 dB, 24-Bit, 192 kHz, 8-Channel D/A Converter with DSD Support)
 *    SPDIF Out control switches between Mic in and SPDIF out.
 *    No sound out or mic input working yet.
 * 
 *  GENERAL INFO:
 *    Model: SB0413
 *    P17 Chip: CA0106-DAT
 *    AC97 Codec: None.
 *    ADC: Unknown
 *    DAC: Unknown
 *    Trying to handle it like the SB0410.
 *
 *  This code was initally based on code from ALSA's emu10k1x.c which is:
 *  Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
 *
 *   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/pci.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/info.h>

MODULE_AUTHOR("James Courtier-Dutton <James@superbug.demon.co.uk>");
MODULE_DESCRIPTION("CA0106");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Creative,SB CA0106 chip}}");

// module parameters (see "Module Parameters")
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 the CA0106 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the CA0106 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable the CA0106 soundcard.");

#include "ca0106.h"

static struct snd_ca0106_details ca0106_chip_details[] = {
	 /* AudigyLS[SB0310] */
	 { .serial = 0x10021102,
	   .name   = "AudigyLS [SB0310]",
	   .ac97   = 1 } , 
	 /* Unknown AudigyLS that also says SB0310 on it */
	 { .serial = 0x10051102,
	   .name   = "AudigyLS [SB0310b]",
	   .ac97   = 1 } ,
	 /* New Sound Blaster Live! 7.1 24bit. This does not have an AC97. 53SB041000001 */
	 { .serial = 0x10061102,
	   .name   = "Live! 7.1 24bit [SB0410]",
	   .gpio_type = 1,
	   .i2c_adc = 1 } ,
	 /* New Dell Sound Blaster Live! 7.1 24bit. This does not have an AC97.  */
	 { .serial = 0x10071102,
	   .name   = "Live! 7.1 24bit [SB0413]",
	   .gpio_type = 1,
	   .i2c_adc = 1 } ,
	 /* New Audigy SE. Has a different DAC. */
	 /* SB0570:
	  * CTRL:CA0106-DAT
	  * ADC: WM8768GEDS
	  * DAC: WM8775EDS
	  */
	 { .serial = 0x100a1102,
	   .name   = "Audigy SE [SB0570]",
	   .gpio_type = 1,
	   .i2c_adc = 1,
	   .spi_dac = 1 } ,
	 /* MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97 */
	 { .serial = 0x10091462,
	   .name   = "MSI K8N Diamond MB [SB0438]",
	   .gpio_type = 1,
	   .i2c_adc = 1 } ,
	 /* Shuttle XPC SD31P which has an onboard Creative Labs
	  * Sound Blaster Live! 24-bit EAX
	  * high-definition 7.1 audio processor".
	  * Added using info from andrewvegan in alsa bug #1298
	  */
	 { .serial = 0x30381297,
	   .name   = "Shuttle XPC SD31P [SD31P]",
	   .gpio_type = 1,
	   .i2c_adc = 1 } ,
	/* Shuttle XPC SD11G5 which has an onboard Creative Labs
	 * Sound Blaster Live! 24-bit EAX
	 * high-definition 7.1 audio processor".
	 * Fixes ALSA bug#1600
         */
	{ .serial = 0x30411297,
	  .name = "Shuttle XPC SD11G5 [SD11G5]",
	  .gpio_type = 1,
	  .i2c_adc = 1 } ,
	 { .serial = 0,
	   .name   = "AudigyLS [Unknown]" }
};

/* hardware definition */
static struct snd_pcm_hardware snd_ca0106_playback_hw = {
	.info =			(SNDRV_PCM_INFO_MMAP | 
				 SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
	.rates =		(SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |
				 SNDRV_PCM_RATE_192000),
	.rate_min =		48000,
	.rate_max =		192000,
	.channels_min =		2,  //1,
	.channels_max =		2,  //6,
	.buffer_bytes_max =	((65536 - 64) * 8),
	.period_bytes_min =	64,
	.period_bytes_max =	(65536 - 64),
	.periods_min =		2,
	.periods_max =		8,
	.fifo_size =		0,
};

static struct snd_pcm_hardware snd_ca0106_capture_hw = {
	.info =			(SNDRV_PCM_INFO_MMAP | 
				 SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
	.rates =		(SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
				 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000),
	.rate_min =		44100,
	.rate_max =		192000,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	((65536 - 64) * 8),
	.period_bytes_min =	64,
	.period_bytes_max =	(65536 - 64),
	.periods_min =		2,
	.periods_max =		2,
	.fifo_size =		0,
};

unsigned int snd_ca0106_ptr_read(struct snd_ca0106 * emu, 
					  unsigned int reg, 
					  unsigned int chn)
{
	unsigned long flags;
	unsigned int regptr, val;
  
	regptr = (reg << 16) | chn;

	spin_lock_irqsave(&emu->emu_lock, flags);
	outl(regptr, emu->port + PTR);
	val = inl(emu->port + DATA);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
	return val;
}

void snd_ca0106_ptr_write(struct snd_ca0106 *emu, 
				   unsigned int reg, 
				   unsigned int chn, 
				   unsigned int data)
{
	unsigned int regptr;
	unsigned long flags;

	regptr = (reg << 16) | chn;

	spin_lock_irqsave(&emu->emu_lock, flags);
	outl(regptr, emu->port + PTR);
	outl(data, emu->port + DATA);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
}

int snd_ca0106_spi_write(struct snd_ca0106 * emu,
				   unsigned int data)
{
	unsigned int reset, set;
	unsigned int reg, tmp;
	int n, result;
	reg = SPI;
	if (data > 0xffff) /* Only 16bit values allowed */
		return 1;
	tmp = snd_ca0106_ptr_read(emu, reg, 0);
	reset = (tmp & ~0x3ffff) | 0x20000; /* Set xxx20000 */
	set = reset | 0x10000; /* Set xxx1xxxx */
	snd_ca0106_ptr_write(emu, reg, 0, reset | data);
	tmp = snd_ca0106_ptr_read(emu, reg, 0); /* write post */
	snd_ca0106_ptr_write(emu, reg, 0, set | data);
	result = 1;
	/* Wait for status bit to return to 0 */
	for (n = 0; n < 100; n++) {
		udelay(10);
		tmp = snd_ca0106_ptr_read(emu, reg, 0);
		if (!(tmp & 0x10000)) {
			result = 0;
			break;
		}
	}
	if (result) /* Timed out */
		return 1;
	snd_ca0106_ptr_write(emu, reg, 0, reset | data);
	tmp = snd_ca0106_ptr_read(emu, reg, 0); /* Write post */
	return 0;
}

int snd_ca0106_i2c_write(struct snd_ca0106 *emu,
				u32 reg,
				u32 value)
{
	u32 tmp;
	int timeout = 0;
	int status;
	int retry;
	if ((reg > 0x7f) || (value > 0x1ff)) {
		snd_printk(KERN_ERR "i2c_write: invalid values.\n");
		return -EINVAL;
	}

	tmp = reg << 25 | value << 16;
	/* Not sure what this I2C channel controls. */
	/* snd_ca0106_ptr_write(emu, I2C_D0, 0, tmp); */

	/* This controls the I2C connected to the WM8775 ADC Codec */
	snd_ca0106_ptr_write(emu, I2C_D1, 0, tmp);

	for (retry = 0; retry < 10; retry++) {
		/* Send the data to i2c */
		tmp = snd_ca0106_ptr_read(emu, I2C_A, 0);
		tmp = tmp & ~(I2C_A_ADC_READ|I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD_MASK);
		tmp = tmp | (I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD);
		snd_ca0106_ptr_write(emu, I2C_A, 0, tmp);

		/* Wait till the transaction ends */
		while (1) {
			status = snd_ca0106_ptr_read(emu, I2C_A, 0);
                	//snd_printk("I2C:status=0x%x\n", status);
			timeout++;
			if ((status & I2C_A_ADC_START) == 0)
				break;

			if (timeout > 1000)
				break;
		}
		//Read back and see if the transaction is successful
		if ((status & I2C_A_ADC_ABORT) == 0)
			break;
	}

	if (retry == 10) {
		snd_printk(KERN_ERR "Writing to ADC failed!\n");
		return -EINVAL;
	}
    
    	return 0;
}


static void snd_ca0106_intr_enable(struct snd_ca0106 *emu, unsigned int intrenb)
{
	unsigned long flags;
	unsigned int enable;
  
	spin_lock_irqsave(&emu->emu_lock, flags);
	enable = inl(emu->port + INTE) | intrenb;
	outl(enable, emu->port + INTE);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
}

static void snd_ca0106_intr_disable(struct snd_ca0106 *emu, unsigned int intrenb)
{
	unsigned long flags;
	unsigned int enable;
  
	spin_lock_irqsave(&emu->emu_lock, flags);
	enable = inl(emu->port + INTE) & ~intrenb;
	outl(enable, emu->port + INTE);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
}


static void snd_ca0106_pcm_free_substream(struct snd_pcm_runtime *runtime)
{
	kfree(runtime->private_data);
}

/* open_playback callback */
static int snd_ca0106_pcm_open_playback_channel(struct snd_pcm_substream *substream,
						int channel_id)
{
	struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
        struct snd_ca0106_channel *channel = &(chip->playback_channels[channel_id]);
	struct snd_ca0106_pcm *epcm;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);

	if (epcm == NULL)
		return -ENOMEM;
	epcm->emu = chip;
	epcm->substream = substream;
        epcm->channel_id=channel_id;
  
	runtime->private_data = epcm;
	runtime->private_free = snd_ca0106_pcm_free_substream;
  
	runtime->hw = snd_ca0106_playback_hw;

        channel->emu = chip;
        channel->number = channel_id;

	channel->use = 1;
        //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
        //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
	channel->epcm = epcm;
	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                return err;
	if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
                return err;
	return 0;
}

/* close callback */
static int snd_ca0106_pcm_close_playback(struct snd_pcm_substream *substream)
{
	struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
	chip->playback_channels[epcm->channel_id].use = 0;
	/* FIXME: maybe zero others */
	return 0;
}

static int snd_ca0106_pcm_open_playback_front(struct snd_pcm_substream *substream)
{
	return snd_ca0106_pcm_open_playback_channel(substream, PCM_FRONT_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_center_lfe(struct snd_pcm_substream *substream)
{
	return snd_ca0106_pcm_open_playback_channel(substream, PCM_CENTER_LFE_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_unknown(struct snd_pcm_substream *substream)
{
	return snd_ca0106_pcm_open_playback_channel(substream, PCM_UNKNOWN_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_rear(struct snd_pcm_substream *substream)
{
	return snd_ca0106_pcm_open_playback_channel(substream, PCM_REAR_CHANNEL);
}

/* open_capture callback */
static int snd_ca0106_pcm_open_capture_channel(struct snd_pcm_substream *substream,
					       int channel_id)
{
	struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
        struct snd_ca0106_channel *channel = &(chip->capture_channels[channel_id]);
	struct snd_ca0106_pcm *epcm;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
	if (epcm == NULL) {
		snd_printk(KERN_ERR "open_capture_channel: failed epcm alloc\n");
		return -ENOMEM;
        }
	epcm->emu = chip;
	epcm->substream = substream;
        epcm->channel_id=channel_id;
  
	runtime->private_data = epcm;
	runtime->private_free = snd_ca0106_pcm_free_substream;
  
	runtime->hw = snd_ca0106_capture_hw;

        channel->emu = chip;
        channel->number = channel_id;

	channel->use = 1;
        //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
        //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
        channel->epcm = epcm;
	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                return err;
	//snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, &hw_constraints_capture_period_sizes);
	if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
                return err;
	return 0;
}

/* close callback */
static int snd_ca0106_pcm_close_capture(struct snd_pcm_substream *substream)
{
	struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
	chip->capture_channels[epcm->channel_id].use = 0;
	/* FIXME: maybe zero others */
	return 0;
}

static int snd_ca0106_pcm_open_0_capture(struct snd_pcm_substream *substream)
{
	return snd_ca0106_pcm_open_capture_channel(substream, 0);
}

static int snd_ca0106_pcm_open_1_capture(struct snd_pcm_substream *substream)
{
	return snd_ca0106_pcm_open_capture_channel(substream, 1);
}

static int snd_ca0106_pcm_open_2_capture(struct snd_pcm_substream *substream)
{
	return snd_ca0106_pcm_open_capture_channel(substream, 2);
}

static int snd_ca0106_pcm_open_3_capture(struct snd_pcm_substream *substream)
{
	return snd_ca0106_pcm_open_capture_channel(substream, 3);
}

/* hw_params callback */
static int snd_ca0106_pcm_hw_params_playback(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

/* hw_free callback */
static int snd_ca0106_pcm_hw_free_playback(struct snd_pcm_substream *substream)
{
	return snd_pcm_lib_free_pages(substream);
}

/* hw_params callback */
static int snd_ca0106_pcm_hw_params_capture(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

/* hw_free callback */
static int snd_ca0106_pcm_hw_free_capture(struct snd_pcm_substream *substream)
{
	return snd_pcm_lib_free_pages(substream);
}

/* prepare playback callback */
static int snd_ca0106_pcm_prepare_playback(struct snd_pcm_substream *substream)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_ca0106_pcm *epcm = runtime->private_data;
	int channel = epcm->channel_id;
	u32 *table_base = (u32 *)(emu->buffer.area+(8*16*channel));
	u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
	u32 hcfg_mask = HCFG_PLAYBACK_S32_LE;
	u32 hcfg_set = 0x00000000;
	u32 hcfg;
	u32 reg40_mask = 0x30000 << (channel<<1);
	u32 reg40_set = 0;
	u32 reg40;
	/* FIXME: Depending on mixer selection of SPDIF out or not, select the spdif rate or the DAC rate. */
	u32 reg71_mask = 0x03030000 ; /* Global. Set SPDIF rate. We only support 44100 to spdif, not to DAC. */
	u32 reg71_set = 0;
	u32 reg71;
	int i;
	
        //snd_printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, periods=%u, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size, runtime->periods, frames_to_bytes(runtime, 1));
        //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
	/* Rate can be set per channel. */
	/* reg40 control host to fifo */
	/* reg71 controls DAC rate. */
	switch (runtime->rate) {
	case 44100:
		reg40_set = 0x10000 << (channel<<1);
		reg71_set = 0x01010000; 
		break;
        case 48000:
		reg40_set = 0;
		reg71_set = 0; 
		break;
	case 96000:
		reg40_set = 0x20000 << (channel<<1);
		reg71_set = 0x02020000; 
		break;
	case 192000:
		reg40_set = 0x30000 << (channel<<1);
		reg71_set = 0x03030000; 
		break;
	default:
		reg40_set = 0;
		reg71_set = 0; 
		break;
	}
	/* Format is a global setting */
	/* FIXME: Only let the first channel accessed set this. */
	switch (runtime->format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		hcfg_set = 0;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		hcfg_set = HCFG_PLAYBACK_S32_LE;
		break;
	default:
		hcfg_set = 0;
		break;
	}
	hcfg = inl(emu->port + HCFG) ;
	hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
	outl(hcfg, emu->port + HCFG);
	reg40 = snd_ca0106_ptr_read(emu, 0x40, 0);
	reg40 = (reg40 & ~reg40_mask) | reg40_set;
	snd_ca0106_ptr_write(emu, 0x40, 0, reg40);
	reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
	reg71 = (reg71 & ~reg71_mask) | reg71_set;
	snd_ca0106_ptr_write(emu, 0x71, 0, reg71);

	/* FIXME: Check emu->buffer.size before actually writing to it. */
        for(i=0; i < runtime->periods; i++) {
		table_base[i*2] = runtime->dma_addr + (i * period_size_bytes);
		table_base[i*2+1] = period_size_bytes << 16;
	}
 
	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer.addr+(8*16*channel));
	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_SIZE, channel, (runtime->periods - 1) << 19);
	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_PTR, channel, 0);
	snd_ca0106_ptr_write(emu, PLAYBACK_DMA_ADDR, channel, runtime->dma_addr);
	snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, frames_to_bytes(runtime, runtime->period_size)<<16); // buffer size in bytes
	/* FIXME  test what 0 bytes does. */
	snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, 0); // buffer size in bytes
	snd_ca0106_ptr_write(emu, PLAYBACK_POINTER, channel, 0);
	snd_ca0106_ptr_write(emu, 0x07, channel, 0x0);
	snd_ca0106_ptr_write(emu, 0x08, channel, 0);
        snd_ca0106_ptr_write(emu, PLAYBACK_MUTE, 0x0, 0x0); /* Unmute output */
#if 0
	snd_ca0106_ptr_write(emu, SPCS0, 0,
			       SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
			       SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
			       SPCS_GENERATIONSTATUS | 0x00001200 |
			       0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT );
	}
#endif

	return 0;
}

/* prepare capture callback */
static int snd_ca0106_pcm_prepare_capture(struct snd_pcm_substream *substream)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_ca0106_pcm *epcm = runtime->private_data;
	int channel = epcm->channel_id;
	u32 hcfg_mask = HCFG_CAPTURE_S32_LE;
	u32 hcfg_set = 0x00000000;
	u32 hcfg;
	u32 over_sampling=0x2;
	u32 reg71_mask = 0x0000c000 ; /* Global. Set ADC rate. */
	u32 reg71_set = 0;
	u32 reg71;
	
        //snd_printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, periods=%u, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size, runtime->periods, frames_to_bytes(runtime, 1));
        //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
	/* reg71 controls ADC rate. */
	switch (runtime->rate) {
	case 44100:
		reg71_set = 0x00004000;
		break;
        case 48000:
		reg71_set = 0; 
		break;
	case 96000:
		reg71_set = 0x00008000;
		over_sampling=0xa;
		break;
	case 192000:
		reg71_set = 0x0000c000; 
		over_sampling=0xa;
		break;
	default:
		reg71_set = 0; 
		break;
	}
	/* Format is a global setting */
	/* FIXME: Only let the first channel accessed set this. */
	switch (runtime->format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		hcfg_set = 0;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		hcfg_set = HCFG_CAPTURE_S32_LE;
		break;
	default:
		hcfg_set = 0;
		break;
	}
	hcfg = inl(emu->port + HCFG) ;
	hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
	outl(hcfg, emu->port + HCFG);
	reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
	reg71 = (reg71 & ~reg71_mask) | reg71_set;
	snd_ca0106_ptr_write(emu, 0x71, 0, reg71);
        if (emu->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
	        snd_ca0106_i2c_write(emu, ADC_MASTER, over_sampling); /* Adjust the over sampler to better suit the capture rate. */
	}


        //printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size,  frames_to_bytes(runtime, 1));
	snd_ca0106_ptr_write(emu, 0x13, channel, 0);
	snd_ca0106_ptr_write(emu, CAPTURE_DMA_ADDR, channel, runtime->dma_addr);
	snd_ca0106_ptr_write(emu, CAPTURE_BUFFER_SIZE, channel, frames_to_bytes(runtime, runtime->buffer_size)<<16); // buffer size in bytes
	snd_ca0106_ptr_write(emu, CAPTURE_POINTER, channel, 0);

	return 0;
}

/* trigger_playback callback */
static int snd_ca0106_pcm_trigger_playback(struct snd_pcm_substream *substream,
				    int cmd)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime;
	struct snd_ca0106_pcm *epcm;
	int channel;
	int result = 0;
	struct list_head *pos;
        struct snd_pcm_substream *s;
	u32 basic = 0;
	u32 extended = 0;
	int running=0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		running=1;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	default:
		running=0;
		break;
	}
        snd_pcm_group_for_each(pos, substream) {
                s = snd_pcm_group_substream_entry(pos);
		runtime = s->runtime;
		epcm = runtime->private_data;
		channel = epcm->channel_id;
		//snd_printk("channel=%d\n",channel);
		epcm->running = running;
		basic |= (0x1<<channel);
		extended |= (0x10<<channel);
                snd_pcm_trigger_done(s, substream);
        }
	//snd_printk("basic=0x%x, extended=0x%x\n",basic, extended);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) | (extended));
		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(basic));
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(basic));
		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(extended));
		break;
	default:
		result = -EINVAL;
		break;
	}
	return result;
}

/* trigger_capture callback */
static int snd_ca0106_pcm_trigger_capture(struct snd_pcm_substream *substream,
				    int cmd)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_ca0106_pcm *epcm = runtime->private_data;
	int channel = epcm->channel_id;
	int result = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) | (0x110000<<channel));
		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(0x100<<channel));
		epcm->running = 1;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(0x100<<channel));
		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(0x110000<<channel));
		epcm->running = 0;
		break;
	default:
		result = -EINVAL;
		break;
	}
	return result;
}

/* pointer_playback callback */
static snd_pcm_uframes_t
snd_ca0106_pcm_pointer_playback(struct snd_pcm_substream *substream)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_ca0106_pcm *epcm = runtime->private_data;
	snd_pcm_uframes_t ptr, ptr1, ptr2,ptr3,ptr4 = 0;
	int channel = epcm->channel_id;

	if (!epcm->running)
		return 0;

	ptr3 = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
	ptr1 = snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel);
	ptr4 = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
	if (ptr3 != ptr4) ptr1 = snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel);
	ptr2 = bytes_to_frames(runtime, ptr1);
	ptr2+= (ptr4 >> 3) * runtime->period_size;
	ptr=ptr2;
        if (ptr >= runtime->buffer_size)
		ptr -= runtime->buffer_size;
	//printk("ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n", ptr1, ptr2, ptr, (int)runtime->buffer_size, (int)runtime->period_size, (int)runtime->frame_bits, (int)runtime->rate);

	return ptr;
}

/* pointer_capture callback */
static snd_pcm_uframes_t
snd_ca0106_pcm_pointer_capture(struct snd_pcm_substream *substream)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_ca0106_pcm *epcm = runtime->private_data;
	snd_pcm_uframes_t ptr, ptr1, ptr2 = 0;
	int channel = channel=epcm->channel_id;

	if (!epcm->running)
		return 0;

	ptr1 = snd_ca0106_ptr_read(emu, CAPTURE_POINTER, channel);
	ptr2 = bytes_to_frames(runtime, ptr1);
	ptr=ptr2;
        if (ptr >= runtime->buffer_size)
		ptr -= runtime->buffer_size;
	//printk("ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n", ptr1, ptr2, ptr, (int)runtime->buffer_size, (int)runtime->period_size, (int)runtime->frame_bits, (int)runtime->rate);

	return ptr;
}

/* operators */
static struct snd_pcm_ops snd_ca0106_playback_front_ops = {
	.open =        snd_ca0106_pcm_open_playback_front,
	.close =       snd_ca0106_pcm_close_playback,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_playback,
	.hw_free =     snd_ca0106_pcm_hw_free_playback,
	.prepare =     snd_ca0106_pcm_prepare_playback,
	.trigger =     snd_ca0106_pcm_trigger_playback,
	.pointer =     snd_ca0106_pcm_pointer_playback,
};

static struct snd_pcm_ops snd_ca0106_capture_0_ops = {
	.open =        snd_ca0106_pcm_open_0_capture,
	.close =       snd_ca0106_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_capture,
	.hw_free =     snd_ca0106_pcm_hw_free_capture,
	.prepare =     snd_ca0106_pcm_prepare_capture,
	.trigger =     snd_ca0106_pcm_trigger_capture,
	.pointer =     snd_ca0106_pcm_pointer_capture,
};

static struct snd_pcm_ops snd_ca0106_capture_1_ops = {
	.open =        snd_ca0106_pcm_open_1_capture,
	.close =       snd_ca0106_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_capture,
	.hw_free =     snd_ca0106_pcm_hw_free_capture,
	.prepare =     snd_ca0106_pcm_prepare_capture,
	.trigger =     snd_ca0106_pcm_trigger_capture,
	.pointer =     snd_ca0106_pcm_pointer_capture,
};

static struct snd_pcm_ops snd_ca0106_capture_2_ops = {
	.open =        snd_ca0106_pcm_open_2_capture,
	.close =       snd_ca0106_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_capture,
	.hw_free =     snd_ca0106_pcm_hw_free_capture,
	.prepare =     snd_ca0106_pcm_prepare_capture,
	.trigger =     snd_ca0106_pcm_trigger_capture,
	.pointer =     snd_ca0106_pcm_pointer_capture,
};

static struct snd_pcm_ops snd_ca0106_capture_3_ops = {
	.open =        snd_ca0106_pcm_open_3_capture,
	.close =       snd_ca0106_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_capture,
	.hw_free =     snd_ca0106_pcm_hw_free_capture,
	.prepare =     snd_ca0106_pcm_prepare_capture,
	.trigger =     snd_ca0106_pcm_trigger_capture,
	.pointer =     snd_ca0106_pcm_pointer_capture,
};

static struct snd_pcm_ops snd_ca0106_playback_center_lfe_ops = {
        .open =         snd_ca0106_pcm_open_playback_center_lfe,
        .close =        snd_ca0106_pcm_close_playback,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_ca0106_pcm_hw_params_playback,
        .hw_free =      snd_ca0106_pcm_hw_free_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};

static struct snd_pcm_ops snd_ca0106_playback_unknown_ops = {
        .open =         snd_ca0106_pcm_open_playback_unknown,
        .close =        snd_ca0106_pcm_close_playback,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_ca0106_pcm_hw_params_playback,
        .hw_free =      snd_ca0106_pcm_hw_free_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};

static struct snd_pcm_ops snd_ca0106_playback_rear_ops = {
        .open =         snd_ca0106_pcm_open_playback_rear,
        .close =        snd_ca0106_pcm_close_playback,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_ca0106_pcm_hw_params_playback,
		.hw_free =      snd_ca0106_pcm_hw_free_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};


static unsigned short snd_ca0106_ac97_read(struct snd_ac97 *ac97,
					     unsigned short reg)
{
	struct snd_ca0106 *emu = ac97->private_data;
	unsigned long flags;
	unsigned short val;

	spin_lock_irqsave(&emu->emu_lock, flags);
	outb(reg, emu->port + AC97ADDRESS);
	val = inw(emu->port + AC97DATA);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
	return val;
}

static void snd_ca0106_ac97_write(struct snd_ac97 *ac97,
				    unsigned short reg, unsigned short val)
{
	struct snd_ca0106 *emu = ac97->private_data;
	unsigned long flags;
  
	spin_lock_irqsave(&emu->emu_lock, flags);
	outb(reg, emu->port + AC97ADDRESS);
	outw(val, emu->port + AC97DATA);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
}

static int snd_ca0106_ac97(struct snd_ca0106 *chip)
{
	struct snd_ac97_bus *pbus;
	struct snd_ac97_template ac97;
	int err;
	static struct snd_ac97_bus_ops ops = {
		.write = snd_ca0106_ac97_write,
		.read = snd_ca0106_ac97_read,
	};
  
	if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus)) < 0)
		return err;
	pbus->no_vra = 1; /* we don't need VRA */

	memset(&ac97, 0, sizeof(ac97));
	ac97.private_data = chip;
	ac97.scaps = AC97_SCAP_NO_SPDIF;
	return snd_ac97_mixer(pbus, &ac97, &chip->ac97);
}

static int snd_ca0106_free(struct snd_ca0106 *chip)
{
	if (chip->res_port != NULL) {    /* avoid access to already used hardware */
		// disable interrupts
		snd_ca0106_ptr_write(chip, BASIC_INTERRUPT, 0, 0);
		outl(0, chip->port + INTE);
		snd_ca0106_ptr_write(chip, EXTENDED_INT_MASK, 0, 0);
		udelay(1000);
		// disable audio
		//outl(HCFG_LOCKSOUNDCACHE, chip->port + HCFG);
		outl(0, chip->port + HCFG);
		/* FIXME: We need to stop and DMA transfers here.
		 *        But as I am not sure how yet, we cannot from the dma pages.
		 * So we can fix: snd-malloc: Memory leak?  pages not freed = 8
		 */
	}
	// release the data
#if 1
	if (chip->buffer.area)
		snd_dma_free_pages(&chip->buffer);
#endif

	// release the i/o port
	release_and_free_resource(chip->res_port);

	// release the irq
	if (chip->irq >= 0)
		free_irq(chip->irq, (void *)chip);
	pci_disable_device(chip->pci);
	kfree(chip);
	return 0;
}

static int snd_ca0106_dev_free(struct snd_device *device)
{
	struct snd_ca0106 *chip = device->device_data;
	return snd_ca0106_free(chip);
}

static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id,
					  struct pt_regs *regs)
{
	unsigned int status;

	struct snd_ca0106 *chip = dev_id;
	int i;
	int mask;
        unsigned int stat76;
	struct snd_ca0106_channel *pchannel;

	status = inl(chip->port + IPR);
	if (! status)
		return IRQ_NONE;

        stat76 = snd_ca0106_ptr_read(chip, EXTENDED_INT, 0);
	//snd_printk("interrupt status = 0x%08x, stat76=0x%08x\n", status, stat76);
	//snd_printk("ptr=0x%08x\n",snd_ca0106_ptr_read(chip, PLAYBACK_POINTER, 0));
        mask = 0x11; /* 0x1 for one half, 0x10 for the other half period. */
	for(i = 0; i < 4; i++) {
		pchannel = &(chip->playback_channels[i]);
		if (stat76 & mask) {
/* FIXME: Select the correct substream for period elapsed */
			if(pchannel->use) {
				snd_pcm_period_elapsed(pchannel->epcm->substream);
				//printk(KERN_INFO "interrupt [%d] used\n", i);
                        }
		}
	        //printk(KERN_INFO "channel=%p\n",pchannel);
	        //printk(KERN_INFO "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
		mask <<= 1;
	}
        mask = 0x110000; /* 0x1 for one half, 0x10 for the other half period. */
	for(i = 0; i < 4; i++) {
		pchannel = &(chip->capture_channels[i]);
		if (stat76 & mask) {
/* FIXME: Select the correct substream for period elapsed */
			if(pchannel->use) {
				snd_pcm_period_elapsed(pchannel->epcm->substream);
				//printk(KERN_INFO "interrupt [%d] used\n", i);
                        }
		}
	        //printk(KERN_INFO "channel=%p\n",pchannel);
	        //printk(KERN_INFO "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
		mask <<= 1;
	}

        snd_ca0106_ptr_write(chip, EXTENDED_INT, 0, stat76);

	if (chip->midi.dev_id &&
	    (status & (chip->midi.ipr_tx|chip->midi.ipr_rx))) {
		if (chip->midi.interrupt)
			chip->midi.interrupt(&chip->midi, status);
		else
			chip->midi.interrupt_disable(&chip->midi, chip->midi.tx_enable | chip->midi.rx_enable);
	}

	// acknowledge the interrupt if necessary
	outl(status, chip->port+IPR);

	return IRQ_HANDLED;
}

static int __devinit snd_ca0106_pcm(struct snd_ca0106 *emu, int device, struct snd_pcm **rpcm)
{
	struct snd_pcm *pcm;
	struct snd_pcm_substream *substream;
	int err;
  
	if (rpcm)
		*rpcm = NULL;
	if ((err = snd_pcm_new(emu->card, "ca0106", device, 1, 1, &pcm)) < 0)
		return err;
  
	pcm->private_data = emu;

	switch (device) {
	case 0:
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_front_ops);
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_0_ops);
          break;
	case 1:
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_rear_ops);
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_1_ops);
          break;
	case 2:
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_center_lfe_ops);
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_2_ops);
          break;
	case 3:
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_unknown_ops);
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_3_ops);
          break;
        }

	pcm->info_flags = 0;
	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
	strcpy(pcm->name, "CA0106");
	emu->pcm = pcm;

	for(substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; 
	    substream; 
	    substream = substream->next) {
		if ((err = snd_pcm_lib_preallocate_pages(substream, 
							 SNDRV_DMA_TYPE_DEV, 
							 snd_dma_pci_data(emu->pci), 
							 64*1024, 64*1024)) < 0) /* FIXME: 32*1024 for sound buffer, between 32and64 for Periods table. */
			return err;
	}

	for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; 
	      substream; 
	      substream = substream->next) {
 		if ((err = snd_pcm_lib_preallocate_pages(substream, 
	                                           SNDRV_DMA_TYPE_DEV, 
	                                           snd_dma_pci_data(emu->pci), 
	                                           64*1024, 64*1024)) < 0)
			return err;
	}
  
	if (rpcm)
		*rpcm = pcm;
  
	return 0;
}

static unsigned int spi_dac_init[] = {
	0x00ff,
	0x02ff,
	0x0400,
	0x0520,
	0x0600,
	0x08ff,
	0x0aff,
	0x0cff,
	0x0eff,
	0x10ff,
	0x1200,
	0x1400,
	0x1480,
	0x1800,
	0x1aff,
	0x1cff,
	0x1e00,
	0x0530,
	0x0602,
	0x0622,
	0x1400,
};

static int __devinit snd_ca0106_create(struct snd_card *card,
					 struct pci_dev *pci,
					 struct snd_ca0106 **rchip)
{
	struct snd_ca0106 *chip;
	struct snd_ca0106_details *c;
	int err;
	int ch;
	static struct snd_device_ops ops = {
		.dev_free = snd_ca0106_dev_free,
	};
  
	*rchip = NULL;
  
	if ((err = pci_enable_device(pci)) < 0)
		return err;
	if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
	    pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
		printk(KERN_ERR "error to set 32bit mask DMA\n");
		pci_disable_device(pci);
		return -ENXIO;
	}
  
	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL) {
		pci_disable_device(pci);
		return -ENOMEM;
	}
  
	chip->card = card;
	chip->pci = pci;
	chip->irq = -1;

	spin_lock_init(&chip->emu_lock);
  
	chip->port = pci_resource_start(pci, 0);
	if ((chip->res_port = request_region(chip->port, 0x20,
					     "snd_ca0106")) == NULL) { 
		snd_ca0106_free(chip);
		printk(KERN_ERR "cannot allocate the port\n");
		return -EBUSY;
	}

	if (request_irq(pci->irq, snd_ca0106_interrupt,
			SA_INTERRUPT|SA_SHIRQ, "snd_ca0106",
			(void *)chip)) {
		snd_ca0106_free(chip);
		printk(KERN_ERR "cannot grab irq\n");
		return -EBUSY;
	}
	chip->irq = pci->irq;
  
 	/* This stores the periods table. */ 
	if(snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), 1024, &chip->buffer) < 0) {
		snd_ca0106_free(chip);
		return -ENOMEM;
	}

	pci_set_master(pci);
	/* read revision & serial */
	pci_read_config_byte(pci, PCI_REVISION_ID, &chip->revision);
	pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &chip->serial);
	pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &chip->model);
#if 1
	printk(KERN_INFO "Model %04x Rev %08x Serial %08x\n", chip->model,
	       chip->revision, chip->serial);
#endif
	strcpy(card->driver, "CA0106");
	strcpy(card->shortname, "CA0106");

	for (c = ca0106_chip_details; c->serial; c++) {
		if (c->serial == chip->serial)
			break;
	}
	chip->details = c;
	sprintf(card->longname, "%s at 0x%lx irq %i",
		c->name, chip->port, chip->irq);

	outl(0, chip->port + INTE);

	/*
	 *  Init to 0x02109204 :
	 *  Clock accuracy    = 0     (1000ppm)
	 *  Sample Rate       = 2     (48kHz)
	 *  Audio Channel     = 1     (Left of 2)
	 *  Source Number     = 0     (Unspecified)
	 *  Generation Status = 1     (Original for Cat Code 12)
	 *  Cat Code          = 12    (Digital Signal Mixer)
	 *  Mode              = 0     (Mode 0)
	 *  Emphasis          = 0     (None)
	 *  CP                = 1     (Copyright unasserted)
	 *  AN                = 0     (Audio data)
	 *  P                 = 0     (Consumer)
	 */
	snd_ca0106_ptr_write(chip, SPCS0, 0,
				chip->spdif_bits[0] =
				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
				SPCS_GENERATIONSTATUS | 0x00001200 |
				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
	/* Only SPCS1 has been tested */
	snd_ca0106_ptr_write(chip, SPCS1, 0,
				chip->spdif_bits[1] =
				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
				SPCS_GENERATIONSTATUS | 0x00001200 |
				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
	snd_ca0106_ptr_write(chip, SPCS2, 0,
				chip->spdif_bits[2] =
				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
				SPCS_GENERATIONSTATUS | 0x00001200 |
				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
	snd_ca0106_ptr_write(chip, SPCS3, 0,
				chip->spdif_bits[3] =
				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
				SPCS_GENERATIONSTATUS | 0x00001200 |
				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);

        snd_ca0106_ptr_write(chip, PLAYBACK_MUTE, 0, 0x00fc0000);
        snd_ca0106_ptr_write(chip, CAPTURE_MUTE, 0, 0x00fc0000);

        /* Write 0x8000 to AC97_REC_GAIN to mute it. */
        outb(AC97_REC_GAIN, chip->port + AC97ADDRESS);
        outw(0x8000, chip->port + AC97DATA);
#if 0
	snd_ca0106_ptr_write(chip, SPCS0, 0, 0x2108006);
	snd_ca0106_ptr_write(chip, 0x42, 0, 0x2108006);
	snd_ca0106_ptr_write(chip, 0x43, 0, 0x2108006);
	snd_ca0106_ptr_write(chip, 0x44, 0, 0x2108006);
#endif

	//snd_ca0106_ptr_write(chip, SPDIF_SELECT2, 0, 0xf0f003f); /* OSS drivers set this. */
	/* Analog or Digital output */
	snd_ca0106_ptr_write(chip, SPDIF_SELECT1, 0, 0xf);
	snd_ca0106_ptr_write(chip, SPDIF_SELECT2, 0, 0x000f0000); /* 0x0b000000 for digital, 0x000b0000 for analog, from win2000 drivers. Use 0x000f0000 for surround71 */
	chip->spdif_enable = 0; /* Set digital SPDIF output off */
	chip->capture_source = 3; /* Set CAPTURE_SOURCE */
	//snd_ca0106_ptr_write(chip, 0x45, 0, 0); /* Analogue out */
	//snd_ca0106_ptr_write(chip, 0x45, 0, 0xf00); /* Digital out */

	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 0, 0x40c81000); /* goes to 0x40c80000 when doing SPDIF IN/OUT */
	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 1, 0xffffffff); /* (Mute) CAPTURE feedback into PLAYBACK volume. Only lower 16 bits matter. */
	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 2, 0x30300000); /* SPDIF IN Volume */
	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 3, 0x00700000); /* SPDIF IN Volume, 0x70 = (vol & 0x3f) | 0x40 */
	snd_ca0106_ptr_write(chip, PLAYBACK_ROUTING1, 0, 0x32765410);
	snd_ca0106_ptr_write(chip, PLAYBACK_ROUTING2, 0, 0x76767676);
	snd_ca0106_ptr_write(chip, CAPTURE_ROUTING1, 0, 0x32765410);
	snd_ca0106_ptr_write(chip, CAPTURE_ROUTING2, 0, 0x76767676);
	for(ch = 0; ch < 4; ch++) {
		snd_ca0106_ptr_write(chip, CAPTURE_VOLUME1, ch, 0x30303030); /* Only high 16 bits matter */
		snd_ca0106_ptr_write(chip, CAPTURE_VOLUME2, ch, 0x30303030);
		//snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME1, ch, 0x40404040); /* Mute */
		//snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME2, ch, 0x40404040); /* Mute */
		snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME1, ch, 0xffffffff); /* Mute */
		snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME2, ch, 0xffffffff); /* Mute */
	}
        snd_ca0106_ptr_write(chip, CAPTURE_SOURCE, 0x0, 0x333300e4); /* Select MIC, Line in, TAD in, AUX in */
	chip->capture_source = 3; /* Set CAPTURE_SOURCE */

        if (chip->details->gpio_type == 1) { /* The SB0410 and SB0413 use GPIO differently. */
		/* FIXME: Still need to find out what the other GPIO bits do. E.g. For digital spdif out. */
		outl(0x0, chip->port+GPIO);
		//outl(0x00f0e000, chip->port+GPIO); /* Analog */
		outl(0x005f5301, chip->port+GPIO); /* Analog */
	} else {
		outl(0x0, chip->port+GPIO);
		outl(0x005f03a3, chip->port+GPIO); /* Analog */
		//outl(0x005f02a2, chip->port+GPIO);   /* SPDIF */
	}
	snd_ca0106_intr_enable(chip, 0x105); /* Win2000 uses 0x1e0 */

	//outl(HCFG_LOCKSOUNDCACHE|HCFG_AUDIOENABLE, chip->port+HCFG);
	//outl(0x00001409, chip->port+HCFG); /* 0x1000 causes AC3 to fails. Maybe it effects 24 bit output. */
	//outl(0x00000009, chip->port+HCFG);
	outl(HCFG_AC97 | HCFG_AUDIOENABLE, chip->port+HCFG); /* AC97 2.0, Enable outputs. */

        if (chip->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
	        snd_ca0106_i2c_write(chip, ADC_MUX, ADC_MUX_LINEIN); /* Enable Line-in capture. MIC in currently untested. */
	}
        if (chip->details->spi_dac == 1) { /* The SB0570 use SPI to control DAC. */
		int size, n;

		size = ARRAY_SIZE(spi_dac_init);
		for (n=0; n < size; n++)
			snd_ca0106_spi_write(chip, spi_dac_init[n]);
	}

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
				  chip, &ops)) < 0) {
		snd_ca0106_free(chip);
		return err;
	}
	*rchip = chip;
	return 0;
}


static void ca0106_midi_interrupt_enable(struct snd_ca_midi *midi, int intr)
{
	snd_ca0106_intr_enable((struct snd_ca0106 *)(midi->dev_id), intr);
}

static void ca0106_midi_interrupt_disable(struct snd_ca_midi *midi, int intr)
{
	snd_ca0106_intr_disable((struct snd_ca0106 *)(midi->dev_id), intr);
}

static unsigned char ca0106_midi_read(struct snd_ca_midi *midi, int idx)
{
	return (unsigned char)snd_ca0106_ptr_read((struct snd_ca0106 *)(midi->dev_id),
						  midi->port + idx, 0);
}

static void ca0106_midi_write(struct snd_ca_midi *midi, int data, int idx)
{
	snd_ca0106_ptr_write((struct snd_ca0106 *)(midi->dev_id), midi->port + idx, 0, data);
}

static struct snd_card *ca0106_dev_id_card(void *dev_id)
{
	return ((struct snd_ca0106 *)dev_id)->card;
}

static int ca0106_dev_id_port(void *dev_id)
{
	return ((struct snd_ca0106 *)dev_id)->port;
}

static int __devinit snd_ca0106_midi(struct snd_ca0106 *chip, unsigned int channel)
{
	struct snd_ca_midi *midi;
	char *name;
	int err;

	if (channel == CA0106_MIDI_CHAN_B) {
		name = "CA0106 MPU-401 (UART) B";
		midi =  &chip->midi2;
		midi->tx_enable = INTE_MIDI_TX_B;
		midi->rx_enable = INTE_MIDI_RX_B;
		midi->ipr_tx = IPR_MIDI_TX_B;
		midi->ipr_rx = IPR_MIDI_RX_B;
		midi->port = MIDI_UART_B_DATA;
	} else {
		name = "CA0106 MPU-401 (UART)";
		midi =  &chip->midi;
		midi->tx_enable = INTE_MIDI_TX_A;
		midi->rx_enable = INTE_MIDI_TX_B;
		midi->ipr_tx = IPR_MIDI_TX_A;
		midi->ipr_rx = IPR_MIDI_RX_A;
		midi->port = MIDI_UART_A_DATA;
	}

	midi->reset = CA0106_MPU401_RESET;
	midi->enter_uart = CA0106_MPU401_ENTER_UART;
	midi->ack = CA0106_MPU401_ACK;

	midi->input_avail = CA0106_MIDI_INPUT_AVAIL;
	midi->output_ready = CA0106_MIDI_OUTPUT_READY;

	midi->channel = channel;

	midi->interrupt_enable = ca0106_midi_interrupt_enable;
	midi->interrupt_disable = ca0106_midi_interrupt_disable;

	midi->read = ca0106_midi_read;
	midi->write = ca0106_midi_write;

	midi->get_dev_id_card = ca0106_dev_id_card;
	midi->get_dev_id_port = ca0106_dev_id_port;

	midi->dev_id = chip;
	
	if ((err = ca_midi_init(chip, midi, 0, name)) < 0)
		return err;

	return 0;
}


static int __devinit snd_ca0106_probe(struct pci_dev *pci,
					const struct pci_device_id *pci_id)
{
	static int dev;
	struct snd_card *card;
	struct snd_ca0106 *chip;
	int err;

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

	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
	if (card == NULL)
		return -ENOMEM;

	if ((err = snd_ca0106_create(card, pci, &chip)) < 0) {
		snd_card_free(card);
		return err;
	}

	if ((err = snd_ca0106_pcm(chip, 0, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_ca0106_pcm(chip, 1, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_ca0106_pcm(chip, 2, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_ca0106_pcm(chip, 3, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}
        if (chip->details->ac97 == 1) { /* The SB0410 and SB0413 do not have an AC97 chip. */
		if ((err = snd_ca0106_ac97(chip)) < 0) {
			snd_card_free(card);
			return err;
		}
	}
	if ((err = snd_ca0106_mixer(chip)) < 0) {
		snd_card_free(card);
		return err;
	}

	snd_printdd("ca0106: probe for MIDI channel A ...");
	if ((err = snd_ca0106_midi(chip,CA0106_MIDI_CHAN_A)) < 0) {
		snd_card_free(card);
		snd_printdd(" failed, err=0x%x\n",err);
		return err;
	}
	snd_printdd(" done.\n");

#ifdef CONFIG_PROC_FS
	snd_ca0106_proc_init(chip);
#endif

	if ((err = snd_card_register(card)) < 0) {
		snd_card_free(card);
		return err;
	}

	pci_set_drvdata(pci, card);
	dev++;
	return 0;
}

static void __devexit snd_ca0106_remove(struct pci_dev *pci)
{
	snd_card_free(pci_get_drvdata(pci));
	pci_set_drvdata(pci, NULL);
}

// PCI IDs
static struct pci_device_id snd_ca0106_ids[] = {
	{ 0x1102, 0x0007, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },	/* Audigy LS or Live 24bit */
	{ 0, }
};
MODULE_DEVICE_TABLE(pci, snd_ca0106_ids);

// pci_driver definition
static struct pci_driver driver = {
	.name = "CA0106",
	.id_table = snd_ca0106_ids,
	.probe = snd_ca0106_probe,
	.remove = __devexit_p(snd_ca0106_remove),
};

// initialization of the module
static int __init alsa_card_ca0106_init(void)
{
	return pci_register_driver(&driver);
}

// clean up the module
static void __exit alsa_card_ca0106_exit(void)
{
	pci_unregister_driver(&driver);
}

module_init(alsa_card_ca0106_init)
module_exit(alsa_card_ca0106_exit)