aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/tvaudio.c
blob: 258724b2d6d21a2001450996a3ac23541bc5afdb (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
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
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
/*
 * experimental driver for simple i2c audio chips.
 *
 * Copyright (c) 2000 Gerd Knorr
 * based on code by:
 *   Eric Sandeen (eric_sandeen@bigfoot.com)
 *   Steve VanDeBogart (vandebo@uclink.berkeley.edu)
 *   Greg Alexander (galexand@acm.org)
 *
 * This code is placed under the terms of the GNU General Public License
 *
 * OPTIONS:
 *   debug - set to 1 if you'd like to see debug messages
 *
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/videodev.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/init.h>
#include <linux/smp_lock.h>

#include <media/audiochip.h>
#include <media/id.h>

#include "tvaudio.h"

/* ---------------------------------------------------------------------- */
/* insmod args                                                            */

static int debug = 0;	/* insmod parameter */
module_param(debug, int, 0644);

MODULE_DESCRIPTION("device driver for various i2c TV sound decoder / audiomux chips");
MODULE_AUTHOR("Eric Sandeen, Steve VanDeBogart, Greg Alexander, Gerd Knorr");
MODULE_LICENSE("GPL");

#define UNSET    (-1U)
#define dprintk  if (debug) printk

/* ---------------------------------------------------------------------- */
/* our structs                                                            */

#define MAXREGS 64

struct CHIPSTATE;
typedef int  (*getvalue)(int);
typedef int  (*checkit)(struct CHIPSTATE*);
typedef int  (*initialize)(struct CHIPSTATE*);
typedef int  (*getmode)(struct CHIPSTATE*);
typedef void (*setmode)(struct CHIPSTATE*, int mode);
typedef void (*checkmode)(struct CHIPSTATE*);

/* i2c command */
typedef struct AUDIOCMD {
	int             count;             /* # of bytes to send */
	unsigned char   bytes[MAXREGS+1];  /* addr, data, data, ... */
} audiocmd;

/* chip description */
struct CHIPDESC {
	char       *name;             /* chip name         */
	int        id;                /* ID */
	int        addr_lo, addr_hi;  /* i2c address range */
	int        registers;         /* # of registers    */

	int        *insmodopt;
	checkit    checkit;
	initialize initialize;
	int        flags;
#define CHIP_HAS_VOLUME      1
#define CHIP_HAS_BASSTREBLE  2
#define CHIP_HAS_INPUTSEL    4

	/* various i2c command sequences */
	audiocmd   init;

	/* which register has which value */
	int    leftreg,rightreg,treblereg,bassreg;

	/* initialize with (defaults to 65535/65535/32768/32768 */
	int    leftinit,rightinit,trebleinit,bassinit;

	/* functions to convert the values (v4l -> chip) */
	getvalue volfunc,treblefunc,bassfunc;

	/* get/set mode */
	getmode  getmode;
	setmode  setmode;

	/* check / autoswitch audio after channel switches */
	checkmode  checkmode;

	/* input switch register + values for v4l inputs */
	int  inputreg;
	int  inputmap[8];
	int  inputmute;
	int  inputmask;
};
static struct CHIPDESC chiplist[];

/* current state of the chip */
struct CHIPSTATE {
	struct i2c_client c;

	/* index into CHIPDESC array */
	int type;

	/* shadow register set */
	audiocmd   shadow;

	/* current settings */
	__u16 left,right,treble,bass,mode;
	int prevmode;
	int norm;

	/* thread */
	pid_t                tpid;
	struct completion    texit;
	wait_queue_head_t    wq;
	struct timer_list    wt;
	int                  done;
	int                  watch_stereo;
};

#define VIDEO_MODE_RADIO 16      /* norm magic for radio mode */

/* ---------------------------------------------------------------------- */
/* i2c addresses                                                          */

static unsigned short normal_i2c[] = {
	I2C_TDA8425   >> 1,
	I2C_TEA6300   >> 1,
	I2C_TEA6420   >> 1,
	I2C_TDA9840   >> 1,
	I2C_TDA985x_L >> 1,
	I2C_TDA985x_H >> 1,
	I2C_TDA9874   >> 1,
	I2C_PIC16C54  >> 1,
	I2C_CLIENT_END };
I2C_CLIENT_INSMOD;

static struct i2c_driver driver;
static struct i2c_client client_template;


/* ---------------------------------------------------------------------- */
/* i2c I/O functions                                                      */

static int chip_write(struct CHIPSTATE *chip, int subaddr, int val)
{
	unsigned char buffer[2];

	if (-1 == subaddr) {
		dprintk("%s: chip_write: 0x%x\n", chip->c.name, val);
		chip->shadow.bytes[1] = val;
		buffer[0] = val;
		if (1 != i2c_master_send(&chip->c,buffer,1)) {
			printk(KERN_WARNING "%s: I/O error (write 0x%x)\n",
			       chip->c.name, val);
			return -1;
		}
	} else {
		dprintk("%s: chip_write: reg%d=0x%x\n",
			chip->c.name, subaddr, val);
		chip->shadow.bytes[subaddr+1] = val;
		buffer[0] = subaddr;
		buffer[1] = val;
		if (2 != i2c_master_send(&chip->c,buffer,2)) {
			printk(KERN_WARNING "%s: I/O error (write reg%d=0x%x)\n",
			       chip->c.name, subaddr, val);
			return -1;
		}
	}
	return 0;
}

static int chip_write_masked(struct CHIPSTATE *chip, int subaddr, int val, int mask)
{
	if (mask != 0) {
		if (-1 == subaddr) {
			val = (chip->shadow.bytes[1] & ~mask) | (val & mask);
		} else {
			val = (chip->shadow.bytes[subaddr+1] & ~mask) | (val & mask);
		}
	}
	return chip_write(chip, subaddr, val);
}

static int chip_read(struct CHIPSTATE *chip)
{
	unsigned char buffer;

	if (1 != i2c_master_recv(&chip->c,&buffer,1)) {
		printk(KERN_WARNING "%s: I/O error (read)\n", chip->c.name);
		return -1;
	}
	dprintk("%s: chip_read: 0x%x\n", chip->c.name, buffer);
	return buffer;
}

static int chip_read2(struct CHIPSTATE *chip, int subaddr)
{
        unsigned char write[1];
        unsigned char read[1];
        struct i2c_msg msgs[2] = {
                { chip->c.addr, 0,        1, write },
                { chip->c.addr, I2C_M_RD, 1, read  }
        };
        write[0] = subaddr;

	if (2 != i2c_transfer(chip->c.adapter,msgs,2)) {
		printk(KERN_WARNING "%s: I/O error (read2)\n", chip->c.name);
		return -1;
	}
	dprintk("%s: chip_read2: reg%d=0x%x\n",
		chip->c.name, subaddr, read[0]);
	return read[0];
}

static int chip_cmd(struct CHIPSTATE *chip, char *name, audiocmd *cmd)
{
	int i;

	if (0 == cmd->count)
		return 0;

	/* update our shadow register set; print bytes if (debug > 0) */
	dprintk("%s: chip_cmd(%s): reg=%d, data:",
		chip->c.name, name, cmd->bytes[0]);
	for (i = 1; i < cmd->count; i++) {
		dprintk(" 0x%x",cmd->bytes[i]);
		chip->shadow.bytes[i+cmd->bytes[0]] = cmd->bytes[i];
	}
	dprintk("\n");

	/* send data to the chip */
	if (cmd->count != i2c_master_send(&chip->c,cmd->bytes,cmd->count)) {
		printk(KERN_WARNING "%s: I/O error (%s)\n", chip->c.name, name);
		return -1;
	}
	return 0;
}

/* ---------------------------------------------------------------------- */
/* kernel thread for doing i2c stuff asyncronly
 *   right now it is used only to check the audio mode (mono/stereo/whatever)
 *   some time after switching to another TV channel, then turn on stereo
 *   if available, ...
 */

static void chip_thread_wake(unsigned long data)
{
        struct CHIPSTATE *chip = (struct CHIPSTATE*)data;
	wake_up_interruptible(&chip->wq);
}

static int chip_thread(void *data)
{
	DECLARE_WAITQUEUE(wait, current);
        struct CHIPSTATE *chip = data;
	struct CHIPDESC  *desc = chiplist + chip->type;

	daemonize("%s", chip->c.name);
	allow_signal(SIGTERM);
	dprintk("%s: thread started\n", chip->c.name);

	for (;;) {
		add_wait_queue(&chip->wq, &wait);
		if (!chip->done) {
			set_current_state(TASK_INTERRUPTIBLE);
			schedule();
		}
		remove_wait_queue(&chip->wq, &wait);
		try_to_freeze();
		if (chip->done || signal_pending(current))
			break;
		dprintk("%s: thread wakeup\n", chip->c.name);

		/* don't do anything for radio or if mode != auto */
		if (chip->norm == VIDEO_MODE_RADIO || chip->mode != 0)
			continue;

		/* have a look what's going on */
		desc->checkmode(chip);

		/* schedule next check */
		mod_timer(&chip->wt, jiffies+2*HZ);
	}

	dprintk("%s: thread exiting\n", chip->c.name);
        complete_and_exit(&chip->texit, 0);
	return 0;
}

static void generic_checkmode(struct CHIPSTATE *chip)
{
	struct CHIPDESC  *desc = chiplist + chip->type;
	int mode = desc->getmode(chip);

	if (mode == chip->prevmode)
	    return;

	dprintk("%s: thread checkmode\n", chip->c.name);
	chip->prevmode = mode;

	if (mode & VIDEO_SOUND_STEREO)
		desc->setmode(chip,VIDEO_SOUND_STEREO);
	else if (mode & VIDEO_SOUND_LANG1)
		desc->setmode(chip,VIDEO_SOUND_LANG1);
	else if (mode & VIDEO_SOUND_LANG2)
		desc->setmode(chip,VIDEO_SOUND_LANG2);
	else
		desc->setmode(chip,VIDEO_SOUND_MONO);
}

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda9840                */

#define TDA9840_SW         0x00
#define TDA9840_LVADJ      0x02
#define TDA9840_STADJ      0x03
#define TDA9840_TEST       0x04

#define TDA9840_MONO       0x10
#define TDA9840_STEREO     0x2a
#define TDA9840_DUALA      0x12
#define TDA9840_DUALB      0x1e
#define TDA9840_DUALAB     0x1a
#define TDA9840_DUALBA     0x16
#define TDA9840_EXTERNAL   0x7a

#define TDA9840_DS_DUAL    0x20 /* Dual sound identified          */
#define TDA9840_ST_STEREO  0x40 /* Stereo sound identified        */
#define TDA9840_PONRES     0x80 /* Power-on reset detected if = 1 */

#define TDA9840_TEST_INT1SN 0x1 /* Integration time 0.5s when set */
#define TDA9840_TEST_INTFU 0x02 /* Disables integrator function */

static int tda9840_getmode(struct CHIPSTATE *chip)
{
	int val, mode;

	val = chip_read(chip);
	mode = VIDEO_SOUND_MONO;
	if (val & TDA9840_DS_DUAL)
		mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	if (val & TDA9840_ST_STEREO)
		mode |= VIDEO_SOUND_STEREO;

	dprintk ("tda9840_getmode(): raw chip read: %d, return: %d\n",
		 val, mode);
	return mode;
}

static void tda9840_setmode(struct CHIPSTATE *chip, int mode)
{
	int update = 1;
	int t = chip->shadow.bytes[TDA9840_SW + 1] & ~0x7e;

	switch (mode) {
	case VIDEO_SOUND_MONO:
		t |= TDA9840_MONO;
		break;
	case VIDEO_SOUND_STEREO:
		t |= TDA9840_STEREO;
		break;
	case VIDEO_SOUND_LANG1:
		t |= TDA9840_DUALA;
		break;
	case VIDEO_SOUND_LANG2:
		t |= TDA9840_DUALB;
		break;
	default:
		update = 0;
	}

	if (update)
		chip_write(chip, TDA9840_SW, t);
}

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda985x                */

/* subaddresses for TDA9855 */
#define TDA9855_VR	0x00 /* Volume, right */
#define TDA9855_VL	0x01 /* Volume, left */
#define TDA9855_BA	0x02 /* Bass */
#define TDA9855_TR	0x03 /* Treble */
#define TDA9855_SW	0x04 /* Subwoofer - not connected on DTV2000 */

/* subaddresses for TDA9850 */
#define TDA9850_C4	0x04 /* Control 1 for TDA9850 */

/* subaddesses for both chips */
#define TDA985x_C5	0x05 /* Control 2 for TDA9850, Control 1 for TDA9855 */
#define TDA985x_C6	0x06 /* Control 3 for TDA9850, Control 2 for TDA9855 */
#define TDA985x_C7	0x07 /* Control 4 for TDA9850, Control 3 for TDA9855 */
#define TDA985x_A1	0x08 /* Alignment 1 for both chips */
#define TDA985x_A2	0x09 /* Alignment 2 for both chips */
#define TDA985x_A3	0x0a /* Alignment 3 for both chips */

/* Masks for bits in TDA9855 subaddresses */
/* 0x00 - VR in TDA9855 */
/* 0x01 - VL in TDA9855 */
/* lower 7 bits control gain from -71dB (0x28) to 16dB (0x7f)
 * in 1dB steps - mute is 0x27 */


/* 0x02 - BA in TDA9855 */
/* lower 5 bits control bass gain from -12dB (0x06) to 16.5dB (0x19)
 * in .5dB steps - 0 is 0x0E */


/* 0x03 - TR in TDA9855 */
/* 4 bits << 1 control treble gain from -12dB (0x3) to 12dB (0xb)
 * in 3dB steps - 0 is 0x7 */

/* Masks for bits in both chips' subaddresses */
/* 0x04 - SW in TDA9855, C4/Control 1 in TDA9850 */
/* Unique to TDA9855: */
/* 4 bits << 2 control subwoofer/surround gain from -14db (0x1) to 14db (0xf)
 * in 3dB steps - mute is 0x0 */

/* Unique to TDA9850: */
/* lower 4 bits control stereo noise threshold, over which stereo turns off
 * set to values of 0x00 through 0x0f for Ster1 through Ster16 */


/* 0x05 - C5 - Control 1 in TDA9855 , Control 2 in TDA9850*/
/* Unique to TDA9855: */
#define TDA9855_MUTE	1<<7 /* GMU, Mute at outputs */
#define TDA9855_AVL	1<<6 /* AVL, Automatic Volume Level */
#define TDA9855_LOUD	1<<5 /* Loudness, 1==off */
#define TDA9855_SUR	1<<3 /* Surround / Subwoofer 1==.5(L-R) 0==.5(L+R) */
			     /* Bits 0 to 3 select various combinations
                              * of line in and line out, only the
                              * interesting ones are defined */
#define TDA9855_EXT	1<<2 /* Selects inputs LIR and LIL.  Pins 41 & 12 */
#define TDA9855_INT	0    /* Selects inputs LOR and LOL.  (internal) */

/* Unique to TDA9850:  */
/* lower 4 bits contol SAP noise threshold, over which SAP turns off
 * set to values of 0x00 through 0x0f for SAP1 through SAP16 */


/* 0x06 - C6 - Control 2 in TDA9855, Control 3 in TDA9850 */
/* Common to TDA9855 and TDA9850: */
#define TDA985x_SAP	3<<6 /* Selects SAP output, mute if not received */
#define TDA985x_STEREO	1<<6 /* Selects Stereo ouput, mono if not received */
#define TDA985x_MONO	0    /* Forces Mono output */
#define TDA985x_LMU	1<<3 /* Mute (LOR/LOL for 9855, OUTL/OUTR for 9850) */

/* Unique to TDA9855: */
#define TDA9855_TZCM	1<<5 /* If set, don't mute till zero crossing */
#define TDA9855_VZCM	1<<4 /* If set, don't change volume till zero crossing*/
#define TDA9855_LINEAR	0    /* Linear Stereo */
#define TDA9855_PSEUDO	1    /* Pseudo Stereo */
#define TDA9855_SPAT_30	2    /* Spatial Stereo, 30% anti-phase crosstalk */
#define TDA9855_SPAT_50	3    /* Spatial Stereo, 52% anti-phase crosstalk */
#define TDA9855_E_MONO	7    /* Forced mono - mono select elseware, so useless*/

/* 0x07 - C7 - Control 3 in TDA9855, Control 4 in TDA9850 */
/* Common to both TDA9855 and TDA9850: */
/* lower 4 bits control input gain from -3.5dB (0x0) to 4dB (0xF)
 * in .5dB steps -  0dB is 0x7 */

/* 0x08, 0x09 - A1 and A2 (read/write) */
/* Common to both TDA9855 and TDA9850: */
/* lower 5 bites are wideband and spectral expander alignment
 * from 0x00 to 0x1f - nominal at 0x0f and 0x10 (read/write) */
#define TDA985x_STP	1<<5 /* Stereo Pilot/detect (read-only) */
#define TDA985x_SAPP	1<<6 /* SAP Pilot/detect (read-only) */
#define TDA985x_STS	1<<7 /* Stereo trigger 1= <35mV 0= <30mV (write-only)*/

/* 0x0a - A3 */
/* Common to both TDA9855 and TDA9850: */
/* lower 3 bits control timing current for alignment: -30% (0x0), -20% (0x1),
 * -10% (0x2), nominal (0x3), +10% (0x6), +20% (0x5), +30% (0x4) */
#define TDA985x_ADJ	1<<7 /* Stereo adjust on/off (wideband and spectral */

static int tda9855_volume(int val) { return val/0x2e8+0x27; }
static int tda9855_bass(int val)   { return val/0xccc+0x06; }
static int tda9855_treble(int val) { return (val/0x1c71+0x3)<<1; }

static int  tda985x_getmode(struct CHIPSTATE *chip)
{
	int mode;

	mode = ((TDA985x_STP | TDA985x_SAPP) &
		chip_read(chip)) >> 4;
	/* Add mono mode regardless of SAP and stereo */
	/* Allows forced mono */
	return mode | VIDEO_SOUND_MONO;
}

static void tda985x_setmode(struct CHIPSTATE *chip, int mode)
{
	int update = 1;
	int c6 = chip->shadow.bytes[TDA985x_C6+1] & 0x3f;

	switch (mode) {
	case VIDEO_SOUND_MONO:
		c6 |= TDA985x_MONO;
		break;
	case VIDEO_SOUND_STEREO:
		c6 |= TDA985x_STEREO;
		break;
	case VIDEO_SOUND_LANG1:
		c6 |= TDA985x_SAP;
		break;
	default:
		update = 0;
	}
	if (update)
		chip_write(chip,TDA985x_C6,c6);
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda9873h               */

/* Subaddresses for TDA9873H */

#define TDA9873_SW	0x00 /* Switching                    */
#define TDA9873_AD	0x01 /* Adjust                       */
#define TDA9873_PT	0x02 /* Port                         */

/* Subaddress 0x00: Switching Data
 * B7..B0:
 *
 * B1, B0: Input source selection
 *  0,  0  internal
 *  1,  0  external stereo
 *  0,  1  external mono
 */
#define TDA9873_INP_MASK    3
#define TDA9873_INTERNAL    0
#define TDA9873_EXT_STEREO  2
#define TDA9873_EXT_MONO    1

/*    B3, B2: output signal select
 * B4    : transmission mode
 *  0, 0, 1   Mono
 *  1, 0, 0   Stereo
 *  1, 1, 1   Stereo (reversed channel)
 *  0, 0, 0   Dual AB
 *  0, 0, 1   Dual AA
 *  0, 1, 0   Dual BB
 *  0, 1, 1   Dual BA
 */

#define TDA9873_TR_MASK     (7 << 2)
#define TDA9873_TR_MONO     4
#define TDA9873_TR_STEREO   1 << 4
#define TDA9873_TR_REVERSE  (1 << 3) & (1 << 2)
#define TDA9873_TR_DUALA    1 << 2
#define TDA9873_TR_DUALB    1 << 3

/* output level controls
 * B5:  output level switch (0 = reduced gain, 1 = normal gain)
 * B6:  mute                (1 = muted)
 * B7:  auto-mute           (1 = auto-mute enabled)
 */

#define TDA9873_GAIN_NORMAL 1 << 5
#define TDA9873_MUTE        1 << 6
#define TDA9873_AUTOMUTE    1 << 7

/* Subaddress 0x01:  Adjust/standard */

/* Lower 4 bits (C3..C0) control stereo adjustment on R channel (-0.6 - +0.7 dB)
 * Recommended value is +0 dB
 */

#define	TDA9873_STEREO_ADJ	0x06 /* 0dB gain */

/* Bits C6..C4 control FM stantard
 * C6, C5, C4
 *  0,  0,  0   B/G (PAL FM)
 *  0,  0,  1   M
 *  0,  1,  0   D/K(1)
 *  0,  1,  1   D/K(2)
 *  1,  0,  0   D/K(3)
 *  1,  0,  1   I
 */
#define TDA9873_BG		0
#define TDA9873_M       1
#define TDA9873_DK1     2
#define TDA9873_DK2     3
#define TDA9873_DK3     4
#define TDA9873_I       5

/* C7 controls identification response time (1=fast/0=normal)
 */
#define TDA9873_IDR_NORM 0
#define TDA9873_IDR_FAST 1 << 7


/* Subaddress 0x02: Port data */

/* E1, E0   free programmable ports P1/P2
    0,  0   both ports low
    0,  1   P1 high
    1,  0   P2 high
    1,  1   both ports high
*/

#define TDA9873_PORTS    3

/* E2: test port */
#define TDA9873_TST_PORT 1 << 2

/* E5..E3 control mono output channel (together with transmission mode bit B4)
 *
 * E5 E4 E3 B4     OUTM
 *  0  0  0  0     mono
 *  0  0  1  0     DUAL B
 *  0  1  0  1     mono (from stereo decoder)
 */
#define TDA9873_MOUT_MONO   0
#define TDA9873_MOUT_FMONO  0
#define TDA9873_MOUT_DUALA  0
#define TDA9873_MOUT_DUALB  1 << 3
#define TDA9873_MOUT_ST     1 << 4
#define TDA9873_MOUT_EXTM   (1 << 4 ) & (1 << 3)
#define TDA9873_MOUT_EXTL   1 << 5
#define TDA9873_MOUT_EXTR   (1 << 5 ) & (1 << 3)
#define TDA9873_MOUT_EXTLR  (1 << 5 ) & (1 << 4)
#define TDA9873_MOUT_MUTE   (1 << 5 ) & (1 << 4) & (1 << 3)

/* Status bits: (chip read) */
#define TDA9873_PONR        0 /* Power-on reset detected if = 1 */
#define TDA9873_STEREO      2 /* Stereo sound is identified     */
#define TDA9873_DUAL        4 /* Dual sound is identified       */

static int tda9873_getmode(struct CHIPSTATE *chip)
{
	int val,mode;

	val = chip_read(chip);
	mode = VIDEO_SOUND_MONO;
	if (val & TDA9873_STEREO)
		mode |= VIDEO_SOUND_STEREO;
	if (val & TDA9873_DUAL)
		mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	dprintk ("tda9873_getmode(): raw chip read: %d, return: %d\n",
		 val, mode);
	return mode;
}

static void tda9873_setmode(struct CHIPSTATE *chip, int mode)
{
	int sw_data  = chip->shadow.bytes[TDA9873_SW+1] & ~ TDA9873_TR_MASK;
	/*	int adj_data = chip->shadow.bytes[TDA9873_AD+1] ; */

	if ((sw_data & TDA9873_INP_MASK) != TDA9873_INTERNAL) {
		dprintk("tda9873_setmode(): external input\n");
		return;
	}

	dprintk("tda9873_setmode(): chip->shadow.bytes[%d] = %d\n", TDA9873_SW+1, chip->shadow.bytes[TDA9873_SW+1]);
	dprintk("tda9873_setmode(): sw_data  = %d\n", sw_data);

	switch (mode) {
	case VIDEO_SOUND_MONO:
		sw_data |= TDA9873_TR_MONO;
		break;
	case VIDEO_SOUND_STEREO:
		sw_data |= TDA9873_TR_STEREO;
		break;
	case VIDEO_SOUND_LANG1:
		sw_data |= TDA9873_TR_DUALA;
		break;
	case VIDEO_SOUND_LANG2:
		sw_data |= TDA9873_TR_DUALB;
		break;
	default:
		chip->mode = 0;
		return;
	}

	chip_write(chip, TDA9873_SW, sw_data);
	dprintk("tda9873_setmode(): req. mode %d; chip_write: %d\n",
		mode, sw_data);
}

static int tda9873_checkit(struct CHIPSTATE *chip)
{
	int rc;

	if (-1 == (rc = chip_read2(chip,254)))
		return 0;
	return (rc & ~0x1f) == 0x80;
}


/* ---------------------------------------------------------------------- */
/* audio chip description - defines+functions for tda9874h and tda9874a   */
/* Dariusz Kowalewski <darekk@automex.pl>                                 */

/* Subaddresses for TDA9874H and TDA9874A (slave rx) */
#define TDA9874A_AGCGR		0x00	/* AGC gain */
#define TDA9874A_GCONR		0x01	/* general config */
#define TDA9874A_MSR		0x02	/* monitor select */
#define TDA9874A_C1FRA		0x03	/* carrier 1 freq. */
#define TDA9874A_C1FRB		0x04	/* carrier 1 freq. */
#define TDA9874A_C1FRC		0x05	/* carrier 1 freq. */
#define TDA9874A_C2FRA		0x06	/* carrier 2 freq. */
#define TDA9874A_C2FRB		0x07	/* carrier 2 freq. */
#define TDA9874A_C2FRC		0x08	/* carrier 2 freq. */
#define TDA9874A_DCR		0x09	/* demodulator config */
#define TDA9874A_FMER		0x0a	/* FM de-emphasis */
#define TDA9874A_FMMR		0x0b	/* FM dematrix */
#define TDA9874A_C1OLAR		0x0c	/* ch.1 output level adj. */
#define TDA9874A_C2OLAR		0x0d	/* ch.2 output level adj. */
#define TDA9874A_NCONR		0x0e	/* NICAM config */
#define TDA9874A_NOLAR		0x0f	/* NICAM output level adj. */
#define TDA9874A_NLELR		0x10	/* NICAM lower error limit */
#define TDA9874A_NUELR		0x11	/* NICAM upper error limit */
#define TDA9874A_AMCONR		0x12	/* audio mute control */
#define TDA9874A_SDACOSR	0x13	/* stereo DAC output select */
#define TDA9874A_AOSR		0x14	/* analog output select */
#define TDA9874A_DAICONR	0x15	/* digital audio interface config */
#define TDA9874A_I2SOSR		0x16	/* I2S-bus output select */
#define TDA9874A_I2SOLAR	0x17	/* I2S-bus output level adj. */
#define TDA9874A_MDACOSR	0x18	/* mono DAC output select (tda9874a) */
#define TDA9874A_ESP		0xFF	/* easy standard progr. (tda9874a) */

/* Subaddresses for TDA9874H and TDA9874A (slave tx) */
#define TDA9874A_DSR		0x00	/* device status */
#define TDA9874A_NSR		0x01	/* NICAM status */
#define TDA9874A_NECR		0x02	/* NICAM error count */
#define TDA9874A_DR1		0x03	/* add. data LSB */
#define TDA9874A_DR2		0x04	/* add. data MSB */
#define TDA9874A_LLRA		0x05	/* monitor level read-out LSB */
#define TDA9874A_LLRB		0x06	/* monitor level read-out MSB */
#define TDA9874A_SIFLR		0x07	/* SIF level */
#define TDA9874A_TR2		252	/* test reg. 2 */
#define TDA9874A_TR1		253	/* test reg. 1 */
#define TDA9874A_DIC		254	/* device id. code */
#define TDA9874A_SIC		255	/* software id. code */


static int tda9874a_mode = 1;		/* 0: A2, 1: NICAM */
static int tda9874a_GCONR = 0xc0;	/* default config. input pin: SIFSEL=0 */
static int tda9874a_NCONR = 0x01;	/* default NICAM config.: AMSEL=0,AMUTE=1 */
static int tda9874a_ESP = 0x07;		/* default standard: NICAM D/K */
static int tda9874a_dic = -1;		/* device id. code */

/* insmod options for tda9874a */
static unsigned int tda9874a_SIF   = UNSET;
static unsigned int tda9874a_AMSEL = UNSET;
static unsigned int tda9874a_STD   = UNSET;
module_param(tda9874a_SIF, int, 0444);
module_param(tda9874a_AMSEL, int, 0444);
module_param(tda9874a_STD, int, 0444);

/*
 * initialization table for tda9874 decoder:
 *  - carrier 1 freq. registers (3 bytes)
 *  - carrier 2 freq. registers (3 bytes)
 *  - demudulator config register
 *  - FM de-emphasis register (slow identification mode)
 * Note: frequency registers must be written in single i2c transfer.
 */
static struct tda9874a_MODES {
	char *name;
	audiocmd cmd;
} tda9874a_modelist[9] = {
  {	"A2, B/G",
	{ 9, { TDA9874A_C1FRA, 0x72,0x95,0x55, 0x77,0xA0,0x00, 0x00,0x00 }} },
  {	"A2, M (Korea)",
	{ 9, { TDA9874A_C1FRA, 0x5D,0xC0,0x00, 0x62,0x6A,0xAA, 0x20,0x22 }} },
  {	"A2, D/K (1)",
	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x82,0x60,0x00, 0x00,0x00 }} },
  {	"A2, D/K (2)",
	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x8C,0x75,0x55, 0x00,0x00 }} },
  {	"A2, D/K (3)",
	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x77,0xA0,0x00, 0x00,0x00 }} },
  {	"NICAM, I",
	{ 9, { TDA9874A_C1FRA, 0x7D,0x00,0x00, 0x88,0x8A,0xAA, 0x08,0x33 }} },
  {	"NICAM, B/G",
	{ 9, { TDA9874A_C1FRA, 0x72,0x95,0x55, 0x79,0xEA,0xAA, 0x08,0x33 }} },
  {	"NICAM, D/K", /* default */
	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x79,0xEA,0xAA, 0x08,0x33 }} },
  {	"NICAM, L",
	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x79,0xEA,0xAA, 0x09,0x33 }} }
};

static int tda9874a_setup(struct CHIPSTATE *chip)
{
	chip_write(chip, TDA9874A_AGCGR, 0x00); /* 0 dB */
	chip_write(chip, TDA9874A_GCONR, tda9874a_GCONR);
	chip_write(chip, TDA9874A_MSR, (tda9874a_mode) ? 0x03:0x02);
	if(tda9874a_dic == 0x11) {
		chip_write(chip, TDA9874A_FMMR, 0x80);
	} else { /* dic == 0x07 */
		chip_cmd(chip,"tda9874_modelist",&tda9874a_modelist[tda9874a_STD].cmd);
		chip_write(chip, TDA9874A_FMMR, 0x00);
	}
	chip_write(chip, TDA9874A_C1OLAR, 0x00); /* 0 dB */
	chip_write(chip, TDA9874A_C2OLAR, 0x00); /* 0 dB */
	chip_write(chip, TDA9874A_NCONR, tda9874a_NCONR);
	chip_write(chip, TDA9874A_NOLAR, 0x00); /* 0 dB */
	/* Note: If signal quality is poor you may want to change NICAM */
	/* error limit registers (NLELR and NUELR) to some greater values. */
	/* Then the sound would remain stereo, but won't be so clear. */
	chip_write(chip, TDA9874A_NLELR, 0x14); /* default */
	chip_write(chip, TDA9874A_NUELR, 0x50); /* default */

	if(tda9874a_dic == 0x11) {
		chip_write(chip, TDA9874A_AMCONR, 0xf9);
		chip_write(chip, TDA9874A_SDACOSR, (tda9874a_mode) ? 0x81:0x80);
		chip_write(chip, TDA9874A_AOSR, 0x80);
		chip_write(chip, TDA9874A_MDACOSR, (tda9874a_mode) ? 0x82:0x80);
		chip_write(chip, TDA9874A_ESP, tda9874a_ESP);
	} else { /* dic == 0x07 */
		chip_write(chip, TDA9874A_AMCONR, 0xfb);
		chip_write(chip, TDA9874A_SDACOSR, (tda9874a_mode) ? 0x81:0x80);
		chip_write(chip, TDA9874A_AOSR, 0x00); // or 0x10
	}
	dprintk("tda9874a_setup(): %s [0x%02X].\n",
		tda9874a_modelist[tda9874a_STD].name,tda9874a_STD);
	return 1;
}

static int tda9874a_getmode(struct CHIPSTATE *chip)
{
	int dsr,nsr,mode;
	int necr; /* just for debugging */

	mode = VIDEO_SOUND_MONO;

	if(-1 == (dsr = chip_read2(chip,TDA9874A_DSR)))
		return mode;
	if(-1 == (nsr = chip_read2(chip,TDA9874A_NSR)))
		return mode;
	if(-1 == (necr = chip_read2(chip,TDA9874A_NECR)))
		return mode;

	/* need to store dsr/nsr somewhere */
	chip->shadow.bytes[MAXREGS-2] = dsr;
	chip->shadow.bytes[MAXREGS-1] = nsr;

	if(tda9874a_mode) {
		/* Note: DSR.RSSF and DSR.AMSTAT bits are also checked.
		 * If NICAM auto-muting is enabled, DSR.AMSTAT=1 indicates
		 * that sound has (temporarily) switched from NICAM to
		 * mono FM (or AM) on 1st sound carrier due to high NICAM bit
		 * error count. So in fact there is no stereo in this case :-(
		 * But changing the mode to VIDEO_SOUND_MONO would switch
		 * external 4052 multiplexer in audio_hook().
		 */
		if(nsr & 0x02) /* NSR.S/MB=1 */
			mode |= VIDEO_SOUND_STEREO;
		if(nsr & 0x01) /* NSR.D/SB=1 */
			mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	} else {
		if(dsr & 0x02) /* DSR.IDSTE=1 */
			mode |= VIDEO_SOUND_STEREO;
		if(dsr & 0x04) /* DSR.IDDUA=1 */
			mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	}

	dprintk("tda9874a_getmode(): DSR=0x%X, NSR=0x%X, NECR=0x%X, return: %d.\n",
		 dsr, nsr, necr, mode);
	return mode;
}

static void tda9874a_setmode(struct CHIPSTATE *chip, int mode)
{
	/* Disable/enable NICAM auto-muting (based on DSR.RSSF status bit). */
	/* If auto-muting is disabled, we can hear a signal of degrading quality. */
	if(tda9874a_mode) {
		if(chip->shadow.bytes[MAXREGS-2] & 0x20) /* DSR.RSSF=1 */
			tda9874a_NCONR &= 0xfe; /* enable */
		else
			tda9874a_NCONR |= 0x01; /* disable */
		chip_write(chip, TDA9874A_NCONR, tda9874a_NCONR);
	}

	/* Note: TDA9874A supports automatic FM dematrixing (FMMR register)
	 * and has auto-select function for audio output (AOSR register).
	 * Old TDA9874H doesn't support these features.
	 * TDA9874A also has additional mono output pin (OUTM), which
	 * on same (all?) tv-cards is not used, anyway (as well as MONOIN).
	 */
	if(tda9874a_dic == 0x11) {
		int aosr = 0x80;
		int mdacosr = (tda9874a_mode) ? 0x82:0x80;

		switch(mode) {
		case VIDEO_SOUND_MONO:
		case VIDEO_SOUND_STEREO:
			break;
		case VIDEO_SOUND_LANG1:
			aosr = 0x80; /* auto-select, dual A/A */
			mdacosr = (tda9874a_mode) ? 0x82:0x80;
			break;
		case VIDEO_SOUND_LANG2:
			aosr = 0xa0; /* auto-select, dual B/B */
			mdacosr = (tda9874a_mode) ? 0x83:0x81;
			break;
		default:
			chip->mode = 0;
			return;
		}
		chip_write(chip, TDA9874A_AOSR, aosr);
		chip_write(chip, TDA9874A_MDACOSR, mdacosr);

		dprintk("tda9874a_setmode(): req. mode %d; AOSR=0x%X, MDACOSR=0x%X.\n",
			mode, aosr, mdacosr);

	} else { /* dic == 0x07 */
		int fmmr,aosr;

		switch(mode) {
		case VIDEO_SOUND_MONO:
			fmmr = 0x00; /* mono */
			aosr = 0x10; /* A/A */
			break;
		case VIDEO_SOUND_STEREO:
			if(tda9874a_mode) {
				fmmr = 0x00;
				aosr = 0x00; /* handled by NICAM auto-mute */
			} else {
				fmmr = (tda9874a_ESP == 1) ? 0x05 : 0x04; /* stereo */
				aosr = 0x00;
			}
			break;
		case VIDEO_SOUND_LANG1:
			fmmr = 0x02; /* dual */
			aosr = 0x10; /* dual A/A */
			break;
		case VIDEO_SOUND_LANG2:
			fmmr = 0x02; /* dual */
			aosr = 0x20; /* dual B/B */
			break;
		default:
			chip->mode = 0;
			return;
		}
		chip_write(chip, TDA9874A_FMMR, fmmr);
		chip_write(chip, TDA9874A_AOSR, aosr);

		dprintk("tda9874a_setmode(): req. mode %d; FMMR=0x%X, AOSR=0x%X.\n",
			mode, fmmr, aosr);
	}
}

static int tda9874a_checkit(struct CHIPSTATE *chip)
{
	int dic,sic;	/* device id. and software id. codes */

	if(-1 == (dic = chip_read2(chip,TDA9874A_DIC)))
		return 0;
	if(-1 == (sic = chip_read2(chip,TDA9874A_SIC)))
		return 0;

	dprintk("tda9874a_checkit(): DIC=0x%X, SIC=0x%X.\n", dic, sic);

	if((dic == 0x11)||(dic == 0x07)) {
		printk("tvaudio: found tda9874%s.\n", (dic == 0x11) ? "a":"h");
		tda9874a_dic = dic;	/* remember device id. */
		return 1;
	}
	return 0;	/* not found */
}

static int tda9874a_initialize(struct CHIPSTATE *chip)
{
	if (tda9874a_SIF > 2)
		tda9874a_SIF = 1;
	if (tda9874a_STD > 8)
		tda9874a_STD = 0;
	if(tda9874a_AMSEL > 1)
		tda9874a_AMSEL = 0;

	if(tda9874a_SIF == 1)
		tda9874a_GCONR = 0xc0;	/* sound IF input 1 */
	else
		tda9874a_GCONR = 0xc1;	/* sound IF input 2 */

	tda9874a_ESP = tda9874a_STD;
	tda9874a_mode = (tda9874a_STD < 5) ? 0 : 1;

	if(tda9874a_AMSEL == 0)
		tda9874a_NCONR = 0x01; /* auto-mute: analog mono input */
	else
		tda9874a_NCONR = 0x05; /* auto-mute: 1st carrier FM or AM */

	tda9874a_setup(chip);
	return 0;
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tea6420                */

#define TEA6300_VL         0x00  /* volume left */
#define TEA6300_VR         0x01  /* volume right */
#define TEA6300_BA         0x02  /* bass */
#define TEA6300_TR         0x03  /* treble */
#define TEA6300_FA         0x04  /* fader control */
#define TEA6300_S          0x05  /* switch register */
                                 /* values for those registers: */
#define TEA6300_S_SA       0x01  /* stereo A input */
#define TEA6300_S_SB       0x02  /* stereo B */
#define TEA6300_S_SC       0x04  /* stereo C */
#define TEA6300_S_GMU      0x80  /* general mute */

#define TEA6320_V          0x00  /* volume (0-5)/loudness off (6)/zero crossing mute(7) */
#define TEA6320_FFR        0x01  /* fader front right (0-5) */
#define TEA6320_FFL        0x02  /* fader front left (0-5) */
#define TEA6320_FRR        0x03  /* fader rear right (0-5) */
#define TEA6320_FRL        0x04  /* fader rear left (0-5) */
#define TEA6320_BA         0x05  /* bass (0-4) */
#define TEA6320_TR         0x06  /* treble (0-4) */
#define TEA6320_S          0x07  /* switch register */
                                 /* values for those registers: */
#define TEA6320_S_SA       0x07  /* stereo A input */
#define TEA6320_S_SB       0x06  /* stereo B */
#define TEA6320_S_SC       0x05  /* stereo C */
#define TEA6320_S_SD       0x04  /* stereo D */
#define TEA6320_S_GMU      0x80  /* general mute */

#define TEA6420_S_SA       0x00  /* stereo A input */
#define TEA6420_S_SB       0x01  /* stereo B */
#define TEA6420_S_SC       0x02  /* stereo C */
#define TEA6420_S_SD       0x03  /* stereo D */
#define TEA6420_S_SE       0x04  /* stereo E */
#define TEA6420_S_GMU      0x05  /* general mute */

static int tea6300_shift10(int val) { return val >> 10; }
static int tea6300_shift12(int val) { return val >> 12; }

/* Assumes 16bit input (values 0x3f to 0x0c are unique, values less than */
/* 0x0c mirror those immediately higher) */
static int tea6320_volume(int val) { return (val / (65535/(63-12)) + 12) & 0x3f; }
static int tea6320_shift11(int val) { return val >> 11; }
static int tea6320_initialize(struct CHIPSTATE * chip)
{
	chip_write(chip, TEA6320_FFR, 0x3f);
	chip_write(chip, TEA6320_FFL, 0x3f);
	chip_write(chip, TEA6320_FRR, 0x3f);
	chip_write(chip, TEA6320_FRL, 0x3f);

	return 0;
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda8425                */

#define TDA8425_VL         0x00  /* volume left */
#define TDA8425_VR         0x01  /* volume right */
#define TDA8425_BA         0x02  /* bass */
#define TDA8425_TR         0x03  /* treble */
#define TDA8425_S1         0x08  /* switch functions */
                                 /* values for those registers: */
#define TDA8425_S1_OFF     0xEE  /* audio off (mute on) */
#define TDA8425_S1_CH1     0xCE  /* audio channel 1 (mute off) - "linear stereo" mode */
#define TDA8425_S1_CH2     0xCF  /* audio channel 2 (mute off) - "linear stereo" mode */
#define TDA8425_S1_MU      0x20  /* mute bit */
#define TDA8425_S1_STEREO  0x18  /* stereo bits */
#define TDA8425_S1_STEREO_SPATIAL 0x18 /* spatial stereo */
#define TDA8425_S1_STEREO_LINEAR  0x08 /* linear stereo */
#define TDA8425_S1_STEREO_PSEUDO  0x10 /* pseudo stereo */
#define TDA8425_S1_STEREO_MONO    0x00 /* forced mono */
#define TDA8425_S1_ML      0x06        /* language selector */
#define TDA8425_S1_ML_SOUND_A 0x02     /* sound a */
#define TDA8425_S1_ML_SOUND_B 0x04     /* sound b */
#define TDA8425_S1_ML_STEREO  0x06     /* stereo */
#define TDA8425_S1_IS      0x01        /* channel selector */


static int tda8425_shift10(int val) { return (val >> 10) | 0xc0; }
static int tda8425_shift12(int val) { return (val >> 12) | 0xf0; }

static int tda8425_initialize(struct CHIPSTATE *chip)
{
	struct CHIPDESC *desc = chiplist + chip->type;
	int inputmap[8] = { /* tuner	*/ TDA8425_S1_CH2, /* radio  */ TDA8425_S1_CH1,
			    /* extern	*/ TDA8425_S1_CH1, /* intern */ TDA8425_S1_OFF,
			    /* off	*/ TDA8425_S1_OFF, /* on     */ TDA8425_S1_CH2};

	if (chip->c.adapter->id == I2C_HW_B_RIVA) {
		memcpy (desc->inputmap, inputmap, sizeof (inputmap));
	}
	return 0;
}

static void tda8425_setmode(struct CHIPSTATE *chip, int mode)
{
	int s1 = chip->shadow.bytes[TDA8425_S1+1] & 0xe1;

	if (mode & VIDEO_SOUND_LANG1) {
		s1 |= TDA8425_S1_ML_SOUND_A;
		s1 |= TDA8425_S1_STEREO_PSEUDO;

	} else if (mode & VIDEO_SOUND_LANG2) {
		s1 |= TDA8425_S1_ML_SOUND_B;
		s1 |= TDA8425_S1_STEREO_PSEUDO;

	} else {
		s1 |= TDA8425_S1_ML_STEREO;

		if (mode & VIDEO_SOUND_MONO)
			s1 |= TDA8425_S1_STEREO_MONO;
		if (mode & VIDEO_SOUND_STEREO)
			s1 |= TDA8425_S1_STEREO_SPATIAL;
	}
	chip_write(chip,TDA8425_S1,s1);
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for pic16c54 (PV951)       */

/* the registers of 16C54, I2C sub address. */
#define PIC16C54_REG_KEY_CODE     0x01	       /* Not use. */
#define PIC16C54_REG_MISC         0x02

/* bit definition of the RESET register, I2C data. */
#define PIC16C54_MISC_RESET_REMOTE_CTL 0x01 /* bit 0, Reset to receive the key */
                                            /*        code of remote controller */
#define PIC16C54_MISC_MTS_MAIN         0x02 /* bit 1 */
#define PIC16C54_MISC_MTS_SAP          0x04 /* bit 2 */
#define PIC16C54_MISC_MTS_BOTH         0x08 /* bit 3 */
#define PIC16C54_MISC_SND_MUTE         0x10 /* bit 4, Mute Audio(Line-in and Tuner) */
#define PIC16C54_MISC_SND_NOTMUTE      0x20 /* bit 5 */
#define PIC16C54_MISC_SWITCH_TUNER     0x40 /* bit 6	, Switch to Line-in */
#define PIC16C54_MISC_SWITCH_LINE      0x80 /* bit 7	, Switch to Tuner */

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for TA8874Z                */

// write 1st byte
#define TA8874Z_LED_STE	0x80
#define TA8874Z_LED_BIL	0x40
#define TA8874Z_LED_EXT	0x20
#define TA8874Z_MONO_SET	0x10
#define TA8874Z_MUTE	0x08
#define TA8874Z_F_MONO	0x04
#define TA8874Z_MODE_SUB	0x02
#define TA8874Z_MODE_MAIN	0x01

// write 2nd byte
//#define TA8874Z_TI	0x80  // test mode
#define TA8874Z_SEPARATION	0x3f
#define TA8874Z_SEPARATION_DEFAULT	0x10

// read
#define TA8874Z_B1	0x80
#define TA8874Z_B0	0x40
#define TA8874Z_CHAG_FLAG	0x20

//        B1 B0
// mono    L  H
// stereo  L  L
// BIL     H  L

static int ta8874z_getmode(struct CHIPSTATE *chip)
{
	int val, mode;

	val = chip_read(chip);
	mode = VIDEO_SOUND_MONO;
	if (val & TA8874Z_B1){
		mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	}else if (!(val & TA8874Z_B0)){
		mode |= VIDEO_SOUND_STEREO;
	}
	//dprintk ("ta8874z_getmode(): raw chip read: 0x%02x, return: 0x%02x\n", val, mode);
	return mode;
}

static audiocmd ta8874z_stereo = { 2, {0, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_mono = {2, { TA8874Z_MONO_SET, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_main = {2, { 0, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_sub = {2, { TA8874Z_MODE_SUB, TA8874Z_SEPARATION_DEFAULT}};

static void ta8874z_setmode(struct CHIPSTATE *chip, int mode)
{
	int update = 1;
	audiocmd *t = NULL;
	dprintk("ta8874z_setmode(): mode: 0x%02x\n", mode);

	switch(mode){
	case VIDEO_SOUND_MONO:
		t = &ta8874z_mono;
		break;
	case VIDEO_SOUND_STEREO:
		t = &ta8874z_stereo;
		break;
	case VIDEO_SOUND_LANG1:
		t = &ta8874z_main;
		break;
	case VIDEO_SOUND_LANG2:
		t = &ta8874z_sub;
		break;
	default:
		update = 0;
	}

	if(update)
		chip_cmd(chip, "TA8874Z", t);
}

static int ta8874z_checkit(struct CHIPSTATE *chip)
{
	int rc;
	rc = chip_read(chip);
	return ((rc & 0x1f) == 0x1f) ? 1 : 0;
}

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - struct CHIPDESC                              */

/* insmod options to enable/disable individual audio chips */
static int tda8425  = 1;
static int tda9840  = 1;
static int tda9850  = 1;
static int tda9855  = 1;
static int tda9873  = 1;
static int tda9874a = 1;
static int tea6300  = 0;  // address clash with msp34xx
static int tea6320  = 0;  // address clash with msp34xx
static int tea6420  = 1;
static int pic16c54 = 1;
static int ta8874z  = 0;  // address clash with tda9840

module_param(tda8425, int, 0444);
module_param(tda9840, int, 0444);
module_param(tda9850, int, 0444);
module_param(tda9855, int, 0444);
module_param(tda9873, int, 0444);
module_param(tda9874a, int, 0444);
module_param(tea6300, int, 0444);
module_param(tea6320, int, 0444);
module_param(tea6420, int, 0444);
module_param(pic16c54, int, 0444);
module_param(ta8874z, int, 0444);

static struct CHIPDESC chiplist[] = {
	{
		.name       = "tda9840",
		.id         = I2C_DRIVERID_TDA9840,
		.insmodopt  = &tda9840,
		.addr_lo    = I2C_TDA9840 >> 1,
		.addr_hi    = I2C_TDA9840 >> 1,
		.registers  = 5,

		.getmode    = tda9840_getmode,
		.setmode    = tda9840_setmode,
		.checkmode  = generic_checkmode,

	        .init       = { 2, { TDA9840_TEST, TDA9840_TEST_INT1SN
				/* ,TDA9840_SW, TDA9840_MONO */} }
	},
	{
		.name       = "tda9873h",
		.id         = I2C_DRIVERID_TDA9873,
		.checkit    = tda9873_checkit,
		.insmodopt  = &tda9873,
		.addr_lo    = I2C_TDA985x_L >> 1,
		.addr_hi    = I2C_TDA985x_H >> 1,
		.registers  = 3,
		.flags      = CHIP_HAS_INPUTSEL,

		.getmode    = tda9873_getmode,
		.setmode    = tda9873_setmode,
		.checkmode  = generic_checkmode,

		.init       = { 4, { TDA9873_SW, 0xa4, 0x06, 0x03 } },
		.inputreg   = TDA9873_SW,
		.inputmute  = TDA9873_MUTE | TDA9873_AUTOMUTE,
		.inputmap   = {0xa0, 0xa2, 0xa0, 0xa0, 0xc0},
		.inputmask  = TDA9873_INP_MASK|TDA9873_MUTE|TDA9873_AUTOMUTE,

	},
	{
		.name       = "tda9874h/a",
		.id         = I2C_DRIVERID_TDA9874,
		.checkit    = tda9874a_checkit,
		.initialize = tda9874a_initialize,
		.insmodopt  = &tda9874a,
		.addr_lo    = I2C_TDA9874 >> 1,
		.addr_hi    = I2C_TDA9874 >> 1,

		.getmode    = tda9874a_getmode,
		.setmode    = tda9874a_setmode,
		.checkmode  = generic_checkmode,
	},
	{
		.name       = "tda9850",
		.id         = I2C_DRIVERID_TDA9850,
		.insmodopt  = &tda9850,
		.addr_lo    = I2C_TDA985x_L >> 1,
		.addr_hi    = I2C_TDA985x_H >> 1,
		.registers  = 11,

		.getmode    = tda985x_getmode,
		.setmode    = tda985x_setmode,

		.init       = { 8, { TDA9850_C4, 0x08, 0x08, TDA985x_STEREO, 0x07, 0x10, 0x10, 0x03 } }
	},
	{
		.name       = "tda9855",
		.id         = I2C_DRIVERID_TDA9855,
		.insmodopt  = &tda9855,
		.addr_lo    = I2C_TDA985x_L >> 1,
		.addr_hi    = I2C_TDA985x_H >> 1,
		.registers  = 11,
		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE,

		.leftreg    = TDA9855_VL,
		.rightreg   = TDA9855_VR,
		.bassreg    = TDA9855_BA,
		.treblereg  = TDA9855_TR,
		.volfunc    = tda9855_volume,
		.bassfunc   = tda9855_bass,
		.treblefunc = tda9855_treble,

		.getmode    = tda985x_getmode,
		.setmode    = tda985x_setmode,

		.init       = { 12, { 0, 0x6f, 0x6f, 0x0e, 0x07<<1, 0x8<<2,
				    TDA9855_MUTE | TDA9855_AVL | TDA9855_LOUD | TDA9855_INT,
				    TDA985x_STEREO | TDA9855_LINEAR | TDA9855_TZCM | TDA9855_VZCM,
				    0x07, 0x10, 0x10, 0x03 }}
	},
	{
		.name       = "tea6300",
		.id         = I2C_DRIVERID_TEA6300,
		.insmodopt  = &tea6300,
		.addr_lo    = I2C_TEA6300 >> 1,
		.addr_hi    = I2C_TEA6300 >> 1,
		.registers  = 6,
		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,

		.leftreg    = TEA6300_VR,
		.rightreg   = TEA6300_VL,
		.bassreg    = TEA6300_BA,
		.treblereg  = TEA6300_TR,
		.volfunc    = tea6300_shift10,
		.bassfunc   = tea6300_shift12,
		.treblefunc = tea6300_shift12,

		.inputreg   = TEA6300_S,
		.inputmap   = { TEA6300_S_SA, TEA6300_S_SB, TEA6300_S_SC },
		.inputmute  = TEA6300_S_GMU,
	},
	{
		.name       = "tea6320",
		.id         = I2C_DRIVERID_TEA6300,
		.initialize = tea6320_initialize,
		.insmodopt  = &tea6320,
		.addr_lo    = I2C_TEA6300 >> 1,
		.addr_hi    = I2C_TEA6300 >> 1,
		.registers  = 8,
		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,

		.leftreg    = TEA6320_V,
		.rightreg   = TEA6320_V,
		.bassreg    = TEA6320_BA,
		.treblereg  = TEA6320_TR,
		.volfunc    = tea6320_volume,
		.bassfunc   = tea6320_shift11,
		.treblefunc = tea6320_shift11,

		.inputreg   = TEA6320_S,
		.inputmap   = { TEA6320_S_SA, TEA6420_S_SB, TEA6300_S_SC, TEA6320_S_SD },
		.inputmute  = TEA6300_S_GMU,
	},
	{
		.name       = "tea6420",
		.id         = I2C_DRIVERID_TEA6420,
		.insmodopt  = &tea6420,
		.addr_lo    = I2C_TEA6420 >> 1,
		.addr_hi    = I2C_TEA6420 >> 1,
		.registers  = 1,
		.flags      = CHIP_HAS_INPUTSEL,

		.inputreg   = -1,
		.inputmap   = { TEA6420_S_SA, TEA6420_S_SB, TEA6420_S_SC },
		.inputmute  = TEA6300_S_GMU,
	},
	{
		.name       = "tda8425",
		.id         = I2C_DRIVERID_TDA8425,
		.insmodopt  = &tda8425,
		.addr_lo    = I2C_TDA8425 >> 1,
		.addr_hi    = I2C_TDA8425 >> 1,
		.registers  = 9,
		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,

		.leftreg    = TDA8425_VL,
		.rightreg   = TDA8425_VR,
		.bassreg    = TDA8425_BA,
		.treblereg  = TDA8425_TR,
		.volfunc    = tda8425_shift10,
		.bassfunc   = tda8425_shift12,
		.treblefunc = tda8425_shift12,

		.inputreg   = TDA8425_S1,
		.inputmap   = { TDA8425_S1_CH1, TDA8425_S1_CH1, TDA8425_S1_CH1 },
		.inputmute  = TDA8425_S1_OFF,

		.setmode    = tda8425_setmode,
		.initialize = tda8425_initialize,
	},
	{
		.name       = "pic16c54 (PV951)",
		.id         = I2C_DRIVERID_PIC16C54_PV951,
		.insmodopt  = &pic16c54,
		.addr_lo    = I2C_PIC16C54 >> 1,
		.addr_hi    = I2C_PIC16C54>> 1,
		.registers  = 2,
		.flags      = CHIP_HAS_INPUTSEL,

		.inputreg   = PIC16C54_REG_MISC,
		.inputmap   = {PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_TUNER,
			     PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_LINE,
			     PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_LINE,
			     PIC16C54_MISC_SND_MUTE,PIC16C54_MISC_SND_MUTE,
			     PIC16C54_MISC_SND_NOTMUTE},
		.inputmute  = PIC16C54_MISC_SND_MUTE,
	},
	{
		.name       = "ta8874z",
		.id         = -1,
		//.id         = I2C_DRIVERID_TA8874Z,
		.checkit    = ta8874z_checkit,
		.insmodopt  = &ta8874z,
		.addr_lo    = I2C_TDA9840 >> 1,
		.addr_hi    = I2C_TDA9840 >> 1,
		.registers  = 2,

		.getmode    = ta8874z_getmode,
		.setmode    = ta8874z_setmode,
		.checkmode  = generic_checkmode,

	        .init       = {2, { TA8874Z_MONO_SET, TA8874Z_SEPARATION_DEFAULT}},
	},
	{ .name = NULL } /* EOF */
};


/* ---------------------------------------------------------------------- */
/* i2c registration                                                       */

static int chip_attach(struct i2c_adapter *adap, int addr, int kind)
{
	struct CHIPSTATE *chip;
	struct CHIPDESC  *desc;

	chip = kmalloc(sizeof(*chip),GFP_KERNEL);
	if (!chip)
		return -ENOMEM;
	memset(chip,0,sizeof(*chip));
	memcpy(&chip->c,&client_template,sizeof(struct i2c_client));
        chip->c.adapter = adap;
        chip->c.addr = addr;
	i2c_set_clientdata(&chip->c, chip);

	/* find description for the chip */
	dprintk("tvaudio: chip found @ i2c-addr=0x%x\n", addr<<1);
	for (desc = chiplist; desc->name != NULL; desc++) {
		if (0 == *(desc->insmodopt))
			continue;
		if (addr < desc->addr_lo ||
		    addr > desc->addr_hi)
			continue;
		if (desc->checkit && !desc->checkit(chip))
			continue;
		break;
	}
	if (desc->name == NULL) {
		dprintk("tvaudio: no matching chip description found\n");
		return -EIO;
	}
	printk("tvaudio: found %s @ 0x%x\n", desc->name, addr<<1);
	dprintk("tvaudio: matches:%s%s%s.\n",
		(desc->flags & CHIP_HAS_VOLUME)     ? " volume"      : "",
		(desc->flags & CHIP_HAS_BASSTREBLE) ? " bass/treble" : "",
		(desc->flags & CHIP_HAS_INPUTSEL)   ? " audiomux"    : "");

	/* fill required data structures */
	strcpy(chip->c.name, desc->name);
	chip->type = desc-chiplist;
	chip->shadow.count = desc->registers+1;
        chip->prevmode = -1;
	/* register */
	i2c_attach_client(&chip->c);

	/* initialization  */
	if (desc->initialize != NULL)
		desc->initialize(chip);
	else
		chip_cmd(chip,"init",&desc->init);

	if (desc->flags & CHIP_HAS_VOLUME) {
		chip->left   = desc->leftinit   ? desc->leftinit   : 65535;
		chip->right  = desc->rightinit  ? desc->rightinit  : 65535;
		chip_write(chip,desc->leftreg,desc->volfunc(chip->left));
		chip_write(chip,desc->rightreg,desc->volfunc(chip->right));
	}
	if (desc->flags & CHIP_HAS_BASSTREBLE) {
		chip->treble = desc->trebleinit ? desc->trebleinit : 32768;
		chip->bass   = desc->bassinit   ? desc->bassinit   : 32768;
		chip_write(chip,desc->bassreg,desc->bassfunc(chip->bass));
		chip_write(chip,desc->treblereg,desc->treblefunc(chip->treble));
	}

	chip->tpid = -1;
	if (desc->checkmode) {
		/* start async thread */
		init_timer(&chip->wt);
		chip->wt.function = chip_thread_wake;
		chip->wt.data     = (unsigned long)chip;
		init_waitqueue_head(&chip->wq);
		init_completion(&chip->texit);
		chip->tpid = kernel_thread(chip_thread,(void *)chip,0);
		if (chip->tpid < 0)
			printk(KERN_WARNING "%s: kernel_thread() failed\n",
			       chip->c.name);
		wake_up_interruptible(&chip->wq);
	}
	return 0;
}

static int chip_probe(struct i2c_adapter *adap)
{
	/* don't attach on saa7146 based cards,
	   because dedicated drivers are used */
	if (adap->id == I2C_HW_SAA7146)
		return 0;
#ifdef I2C_CLASS_TV_ANALOG
	if (adap->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adap, &addr_data, chip_attach);
#else
	switch (adap->id) {
	case I2C_HW_B_BT848:
	case I2C_HW_B_RIVA:
	case I2C_HW_SAA7134:
		return i2c_probe(adap, &addr_data, chip_attach);
	}
#endif
	return 0;
}

static int chip_detach(struct i2c_client *client)
{
	struct CHIPSTATE *chip = i2c_get_clientdata(client);

	del_timer_sync(&chip->wt);
	if (chip->tpid >= 0) {
		/* shutdown async thread */
		chip->done = 1;
		wake_up_interruptible(&chip->wq);
		wait_for_completion(&chip->texit);
	}

	i2c_detach_client(&chip->c);
	kfree(chip);
	return 0;
}

/* ---------------------------------------------------------------------- */
/* video4linux interface                                                  */

static int chip_command(struct i2c_client *client,
			unsigned int cmd, void *arg)
{
        __u16 *sarg = arg;
	struct CHIPSTATE *chip = i2c_get_clientdata(client);
	struct CHIPDESC  *desc = chiplist + chip->type;

	dprintk("%s: chip_command 0x%x\n", chip->c.name, cmd);

	switch (cmd) {
	case AUDC_SET_INPUT:
		if (desc->flags & CHIP_HAS_INPUTSEL) {
			if (*sarg & 0x80)
				chip_write_masked(chip,desc->inputreg,desc->inputmute,desc->inputmask);
			else
				chip_write_masked(chip,desc->inputreg,desc->inputmap[*sarg],desc->inputmask);
		}
		break;

	case AUDC_SET_RADIO:
		dprintk(KERN_DEBUG "tvaudio: AUDC_SET_RADIO\n");
		chip->norm = VIDEO_MODE_RADIO;
		chip->watch_stereo = 0;
		/* del_timer(&chip->wt); */
		break;

	/* --- v4l ioctls --- */
	/* take care: bttv does userspace copying, we'll get a
	   kernel pointer here... */
	case VIDIOCGAUDIO:
	{
		struct video_audio *va = arg;

		if (desc->flags & CHIP_HAS_VOLUME) {
			va->flags  |= VIDEO_AUDIO_VOLUME;
			va->volume  = max(chip->left,chip->right);
			if (va->volume)
				va->balance = (32768*min(chip->left,chip->right))/
					va->volume;
			else
				va->balance = 32768;
		}
		if (desc->flags & CHIP_HAS_BASSTREBLE) {
			va->flags |= VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE;
			va->bass   = chip->bass;
			va->treble = chip->treble;
		}
		if (chip->norm != VIDEO_MODE_RADIO) {
			if (desc->getmode)
				va->mode = desc->getmode(chip);
			else
				va->mode = VIDEO_SOUND_MONO;
		}
		break;
	}

	case VIDIOCSAUDIO:
	{
		struct video_audio *va = arg;

		if (desc->flags & CHIP_HAS_VOLUME) {
			chip->left = (min(65536 - va->balance,32768) *
				      va->volume) / 32768;
			chip->right = (min(va->balance,(__u16)32768) *
				       va->volume) / 32768;
			chip_write(chip,desc->leftreg,desc->volfunc(chip->left));
			chip_write(chip,desc->rightreg,desc->volfunc(chip->right));
		}
		if (desc->flags & CHIP_HAS_BASSTREBLE) {
			chip->bass = va->bass;
			chip->treble = va->treble;
			chip_write(chip,desc->bassreg,desc->bassfunc(chip->bass));
			chip_write(chip,desc->treblereg,desc->treblefunc(chip->treble));
		}
		if (desc->setmode && va->mode) {
			chip->watch_stereo = 0;
			/* del_timer(&chip->wt); */
			chip->mode = va->mode;
			desc->setmode(chip,va->mode);
		}
		break;
	}
	case VIDIOCSCHAN:
	{
		struct video_channel *vc = arg;

		dprintk(KERN_DEBUG "tvaudio: VIDIOCSCHAN\n");
		chip->norm = vc->norm;
		break;
	}
	case VIDIOCSFREQ:
	{
	    	chip->mode = 0; /* automatic */
		if (desc->checkmode) {
			desc->setmode(chip,VIDEO_SOUND_MONO);
		    	if (chip->prevmode != VIDEO_SOUND_MONO)
		    		chip->prevmode = -1; /* reset previous mode */
			mod_timer(&chip->wt, jiffies+2*HZ);
			/* the thread will call checkmode() later */
		}
	}
	}
	return 0;
}


static struct i2c_driver driver = {
	.owner           = THIS_MODULE,
        .name            = "generic i2c audio driver",
        .id              = I2C_DRIVERID_TVAUDIO,
        .flags           = I2C_DF_NOTIFY,
        .attach_adapter  = chip_probe,
        .detach_client   = chip_detach,
        .command         = chip_command,
};

static struct i2c_client client_template =
{
	.name       = "(unset)",
	.flags      = I2C_CLIENT_ALLOW_USE,
        .driver     = &driver,
};

static int __init audiochip_init_module(void)
{
	struct CHIPDESC  *desc;
	printk(KERN_INFO "tvaudio: TV audio decoder + audio/video mux driver\n");
	printk(KERN_INFO "tvaudio: known chips: ");
	for (desc = chiplist; desc->name != NULL; desc++)
		printk("%s%s", (desc == chiplist) ? "" : ",",desc->name);
	printk("\n");

	return i2c_add_driver(&driver);
}

static void __exit audiochip_cleanup_module(void)
{
	i2c_del_driver(&driver);
}

module_init(audiochip_init_module);
module_exit(audiochip_cleanup_module);

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */