summaryrefslogtreecommitdiffstats
path: root/drivers/char/msp3400.c
blob: 2990efbb6638ee517a5770221020a34afd261e74 (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
/*
 * programming the msp34* sound processor family
 *
 * (c) 1997,1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>
 *
 * what works and what doesn't:
 *
 *  AM-Mono
 *      probably doesn't (untested)
 *
 *  FM-Mono
 *      should work. The stereo modes are backward compatible to FM-mono,
 *      therefore FM-Mono should be allways available.
 *
 *  FM-Stereo (B/G, used in germany)
 *      should work, with autodetect
 *
 *  FM-Stereo (satellite)
 *      should work, no autodetect (i.e. default is mono, but you can
 *      switch to stereo -- untested)
 *
 *  NICAM (B/G, used in UK, Scandinavia and Spain)
 *      should work, with autodetect. Support for NICAM was added by
 *      Pekka Pietikainen <pp@netppl.fi>
 *
 *
 * TODO:
 *   - better SAT support
 *
 *
 * 980623  Thomas Sailer (sailer@ife.ee.ethz.ch)
 *         using soundcore instead of OSS
 *
 */

#include <linux/module.h>
#include <linux/version.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/malloc.h>
#ifdef __SMP__
#include <asm/pgtable.h>
#include <linux/smp_lock.h>
#endif

/* kernel_thread */
#define __KERNEL_SYSCALLS__
#include <linux/unistd.h>

#include <linux/i2c.h>
#include <linux/videodev.h>

#include "msp3400.h"


/* sound mixer stuff */ 
#include <linux/config.h>

#if LINUX_VERSION_CODE > 0x020140 /* need modular sound driver */
# if defined(CONFIG_SOUND) || defined(CONFIG_SOUND_MODULE)
#  define REGISTER_MIXER 1
# endif
#endif


static int debug = 0; /* insmod parameter */

struct msp3400c {
	struct i2c_bus     *bus;

	int nicam;
	int mode;
	int norm;
	int stereo;
	int main, second;	/* sound carrier */

	int left, right;	/* volume */
	int bass, treble;

	/* thread */
	struct task_struct  *thread;
	wait_queue_head_t    wq;
	struct semaphore    *notify;
	int                  active,restart,rmmod;

	int                  watch_stereo;
	struct timer_list    wake_stereo;
};

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

/* ---------------------------------------------------------------------- */

#define dprintk     if (debug) printk

#if LINUX_VERSION_CODE < 0x020100
/* 2.0.x */
#define signal_pending(current)  (current->signal & ~current->blocked)
#define sigfillset(set)
#define mdelay(x) udelay(1000*x)
#else
MODULE_PARM(debug,"i");
#endif

#if LINUX_VERSION_CODE < 0x02017f
void schedule_timeout(int j)
{
	current->timeout = jiffies + j;
	schedule();
}
#endif

/* ---------------------------------------------------------------------- */

#define I2C_MSP3400C       0x80
#define I2C_MSP3400C_DEM   0x10
#define I2C_MSP3400C_DFP   0x12

/* ----------------------------------------------------------------------- */
/* functions for talking to the MSP3400C Sound processor                   */

static int msp3400c_reset(struct i2c_bus *bus)
{
	int ret = 0;
    
	mdelay(2);
	i2c_start(bus);
	i2c_sendbyte(bus, I2C_MSP3400C,2000);
	i2c_sendbyte(bus, 0x00,0);
	i2c_sendbyte(bus, 0x80,0);
	i2c_sendbyte(bus, 0x00,0);
	i2c_stop(bus);
	mdelay(2);
	i2c_start(bus);
	if (0 != i2c_sendbyte(bus, I2C_MSP3400C,2000) ||
	    0 != i2c_sendbyte(bus, 0x00,0) ||
	    0 != i2c_sendbyte(bus, 0x00,0) ||
	    0 != i2c_sendbyte(bus, 0x00,0)) {
		ret = -1;
		printk(KERN_ERR "msp3400: chip reset failed, penguin on i2c bus?\n");
	}
	i2c_stop(bus);
	mdelay(2);
	return ret;
}

static int
msp3400c_read(struct i2c_bus *bus, int dev, int addr)
{
	int ret=0;
	short val = 0;
	i2c_start(bus);
	if (0 != i2c_sendbyte(bus, I2C_MSP3400C,2000) ||
	    0 != i2c_sendbyte(bus, dev+1,       0)    ||
	    0 != i2c_sendbyte(bus, addr >> 8,   0)    ||
	    0 != i2c_sendbyte(bus, addr & 0xff, 0)) {
		ret = -1;
	} else {
		i2c_start(bus);
		if (0 != i2c_sendbyte(bus, I2C_MSP3400C+1,2000)) {
			ret = -1;
		} else {
			val |= (int)i2c_readbyte(bus,0) << 8;
			val |= (int)i2c_readbyte(bus,1);
		}
	}
	i2c_stop(bus);
	if (-1 == ret) {
		printk(KERN_WARNING "msp3400: I/O error, trying reset (read %s 0x%x)\n",
		       (dev == I2C_MSP3400C_DEM) ? "Demod" : "Audio", addr);
		msp3400c_reset(bus);
	}
	return val;
}

static int
msp3400c_write(struct i2c_bus *bus, int dev, int addr, int val)
{
	int ret = 0;
    
	i2c_start(bus);
	if (0 != i2c_sendbyte(bus, I2C_MSP3400C,2000) ||
	    0 != i2c_sendbyte(bus, dev,         0)    ||
	    0 != i2c_sendbyte(bus, addr >> 8,   0)    ||
	    0 != i2c_sendbyte(bus, addr & 0xff, 0)    ||
	    0 != i2c_sendbyte(bus, val >> 8,    0)    ||
	    0 != i2c_sendbyte(bus, val & 0xff,  0))
		ret = -1;
	i2c_stop(bus);
	if (-1 == ret) {
		printk(KERN_WARNING "msp3400: I/O error, trying reset (write %s 0x%x)\n",
		       (dev == I2C_MSP3400C_DEM) ? "Demod" : "Audio", addr);
		msp3400c_reset(bus);
	}
	return ret;
}

/* ------------------------------------------------------------------------ */

/* This macro is allowed for *constants* only, gcc must calculate it
   at compile time.  Remember -- no floats in kernel mode */
#define MSP_CARRIER(freq) ((int)((float)(freq/18.432)*(1<<24)))

#define MSP_MODE_AM_DETECT   0
#define MSP_MODE_FM_RADIO    2
#define MSP_MODE_FM_TERRA    3
#define MSP_MODE_FM_SAT      4
#define MSP_MODE_FM_NICAM1   5
#define MSP_MODE_FM_NICAM2   6

static struct MSP_INIT_DATA_DEM {
	int fir1[6];
	int fir2[6];
	int cdo1;
	int cdo2;
	int ad_cv;
	int mode_reg;
	int dfp_src;
	int dfp_matrix;
} msp_init_data[] = {
	/* AM (for carrier detect / msp3400) */
	{ { 75, 19, 36, 35, 39, 40 }, { 75, 19, 36, 35, 39, 40 },
	  MSP_CARRIER(5.5), MSP_CARRIER(5.5),
	  0x00d0, 0x0500,   0x0020, 0x3000},

	/* AM (for carrier detect / msp3410) */
	{ { -1, -1, -8, 2, 59, 126 }, { -1, -1, -8, 2, 59, 126 },
	  MSP_CARRIER(5.5), MSP_CARRIER(5.5),
	  0x00d0, 0x0100,   0x0020, 0x3000},

	/* FM Radio */
	{ { -8, -8, 4, 6, 78, 107 }, { -8, -8, 4, 6, 78, 107 },
	  MSP_CARRIER(10.7), MSP_CARRIER(10.7),
	  0x00d0, 0x0480, 0x0020, 0x3000 },

	/* Terrestial FM-mono + FM-stereo */
	{ {  3, 18, 27, 48, 66, 72 }, {  3, 18, 27, 48, 66, 72 },
	  MSP_CARRIER(5.5), MSP_CARRIER(5.5),
	  0x00d0, 0x0480,   0x0030, 0x3000},

	/* Sat FM-mono */
	{ {  1,  9, 14, 24, 33, 37 }, {  3, 18, 27, 48, 66, 72 },
	  MSP_CARRIER(6.5), MSP_CARRIER(6.5),
	  0x00c6, 0x0480,   0x0000, 0x3000},

	/* NICAM B/G, D/K */
	{ { -2, -8, -10, 10, 50, 86 }, {  3, 18, 27, 48, 66, 72 },
	  MSP_CARRIER(5.5), MSP_CARRIER(5.5),
	  0x00d0, 0x0040,   0x0120, 0x3000},

	/* NICAM I */
	{ {  2, 4, -6, -4, 40, 94 }, {  3, 18, 27, 48, 66, 72 },
	  MSP_CARRIER(6.0), MSP_CARRIER(6.0),
	  0x00d0, 0x0040,   0x0120, 0x3000},
};

struct CARRIER_DETECT {
	int   cdo;
	char *name;
};

static struct CARRIER_DETECT carrier_detect_main[] = {
	/* main carrier */
	{ MSP_CARRIER(4.5),        "4.5   NTSC"                   }, 
	{ MSP_CARRIER(5.5),        "5.5   PAL B/G"                }, 
	{ MSP_CARRIER(6.0),        "6.0   PAL I"                  },
	{ MSP_CARRIER(6.5),        "6.5   PAL D/K + SAT + SECAM"  }
};

static struct CARRIER_DETECT carrier_detect_55[] = {
	/* PAL B/G */
	{ MSP_CARRIER(5.7421875),  "5.742 PAL B/G FM-stereo"     }, 
	{ MSP_CARRIER(5.85),       "5.85  PAL B/G NICAM"         }
};

static struct CARRIER_DETECT carrier_detect_65[] = {
	/* PAL SAT / SECAM */
	{ MSP_CARRIER(5.85),       "5.85  PAL D/K NICAM" },
	{ MSP_CARRIER(6.2578125),  "6.25  PAL D/K1 FM-stereo" },
	{ MSP_CARRIER(6.7421875),  "6.74  PAL D/K2 FM-stereo" },
	{ MSP_CARRIER(7.02),       "7.02  PAL SAT FM-stereo s/b" },
	{ MSP_CARRIER(7.20),       "7.20  PAL SAT FM-stereo s"   },
	{ MSP_CARRIER(7.38),       "7.38  PAL SAT FM-stereo b"   },
};

#define CARRIER_COUNT(x) (sizeof(x)/sizeof(struct CARRIER_DETECT))

/* ------------------------------------------------------------------------ */

static void msp3400c_setcarrier(struct i2c_bus *bus, int cdo1, int cdo2)
{
	msp3400c_write(bus,I2C_MSP3400C_DEM, 0x0093, cdo1 & 0xfff);
	msp3400c_write(bus,I2C_MSP3400C_DEM, 0x009b, cdo1 >> 12);
	msp3400c_write(bus,I2C_MSP3400C_DEM, 0x00a3, cdo2 & 0xfff);
	msp3400c_write(bus,I2C_MSP3400C_DEM, 0x00ab, cdo2 >> 12);
	msp3400c_write(bus,I2C_MSP3400C_DEM, 0x0056, 0); /*LOAD_REG_1/2*/
}

static void msp3400c_setvolume(struct i2c_bus *bus, int left, int right)
{
	int vol,val,balance;

	vol     = (left > right) ? left : right;
	val     = (vol * 0x73 / 65535) << 8;
	balance = 0;
	if (vol > 0)
		balance = ((right-left) * 127) / vol;

	dprintk("msp3400: setvolume: %d:%d 0x%02x 0x%02x\n",
		left,right,val>>8,balance);
	msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0000, val); /* loudspeaker */
	msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0006, val); /* headphones  */
	/* scart - on/off only */
	msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0007, val ? 0x4000 : 0);
	msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0001, balance << 8);
}

static void msp3400c_setbass(struct i2c_bus *bus, int bass)
{
	int val = ((bass-32768) * 0x60 / 65535) << 8;

	dprintk("msp3400: setbass: %d 0x%02x\n",bass, val>>8);
	msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0002, val); /* loudspeaker */
}

static void msp3400c_settreble(struct i2c_bus *bus, int treble)
{
	int val = ((treble-32768) * 0x60 / 65535) << 8;

	dprintk("msp3400: settreble: %d 0x%02x\n",treble, val>>8);
	msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0003, val); /* loudspeaker */
}

static void msp3400c_setmode(struct msp3400c *msp, int type)
{
	int i;
	
	dprintk("msp3400: setmode: %d\n",type);
	msp->mode   = type;
	msp->stereo = VIDEO_SOUND_MONO;

	msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x00bb,          /* ad_cv */
		       msp_init_data[type].ad_cv);
    
	for (i = 5; i >= 0; i--)                                   /* fir 1 */
		msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0001,
			       msp_init_data[type].fir1[i]);
    
	msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0005, 0x0004); /* fir 2 */
	msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0005, 0x0040);
	msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0005, 0x0000);
	for (i = 5; i >= 0; i--)
		msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0005,
			       msp_init_data[type].fir2[i]);
    
	msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0083,     /* MODE_REG */
		       msp_init_data[type].mode_reg);
    
	msp3400c_setcarrier(msp->bus, msp_init_data[type].cdo1,
			    msp_init_data[type].cdo2);
    
	msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0056, 0); /*LOAD_REG_1/2*/

	msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0008,
		       msp_init_data[type].dfp_src);
	msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0009,
		       msp_init_data[type].dfp_src);
	msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000a,
		       msp_init_data[type].dfp_src);
	msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000e,
		       msp_init_data[type].dfp_matrix);

	if (msp->nicam) {
		/* msp3410 needs some more initialization */
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0010, 0x3000);
	}
}

static void msp3400c_setstereo(struct msp3400c *msp, int mode)
{
	int nicam=0; /* channel source: FM/AM or nicam */

	/* switch demodulator */
	switch (msp->mode) {
	case MSP_MODE_FM_TERRA:
		dprintk("msp3400: FM setstereo: %d\n",mode);
		msp->stereo = mode;
		msp3400c_setcarrier(msp->bus,msp->second,msp->main);
		switch (mode) {
		case VIDEO_SOUND_STEREO:
			msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000e, 0x3001);
			break;
		case VIDEO_SOUND_MONO:
		case VIDEO_SOUND_LANG1:
		case VIDEO_SOUND_LANG2:
			msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000e, 0x3000);
			break;
		}
		break;
	case MSP_MODE_FM_SAT:
		dprintk("msp3400: SAT setstereo: %d\n",mode);
		msp->stereo = mode;
		switch (mode) {
		case VIDEO_SOUND_MONO:
			msp3400c_setcarrier(msp->bus, MSP_CARRIER(6.5), MSP_CARRIER(6.5));
			break;
		case VIDEO_SOUND_STEREO:
			msp3400c_setcarrier(msp->bus, MSP_CARRIER(7.2), MSP_CARRIER(7.02));
			break;
		case VIDEO_SOUND_LANG1:
			msp3400c_setcarrier(msp->bus, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
			break;
		case VIDEO_SOUND_LANG2:
			msp3400c_setcarrier(msp->bus, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
			break;
		}
		break;
	case MSP_MODE_FM_NICAM1:
	case MSP_MODE_FM_NICAM2:
		dprintk("msp3400: NICAM setstereo: %d\n",mode);
		msp->stereo = mode;
		msp3400c_setcarrier(msp->bus,msp->second,msp->main);
		nicam=0x0100;
		break;
	default:
		/* can't do stereo - abort here */
		return;
	}

	/* switch audio */
	switch (mode) {
	case VIDEO_SOUND_STEREO:
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0008,0x0020|nicam);
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0009,0x0020|nicam);
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000a,0x0020|nicam);
#if 0
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0005,0x4000);
#endif
		break;
	case VIDEO_SOUND_MONO:
	case VIDEO_SOUND_LANG1:
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0008,0x0000|nicam);
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0009,0x0000|nicam);
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000a,0x0000|nicam);
		break;
	case VIDEO_SOUND_LANG2:
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0008,0x0010|nicam);
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0009,0x0010|nicam);
		msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000a,0x0010|nicam);
		break;
	}
}

static void
msp3400c_print_mode(struct msp3400c *msp)
{
	if (msp->main == msp->second) {
		printk("msp3400: mono sound carrier: %d.%03d MHz\n",
		       msp->main/910000,(msp->main/910)%1000);
	} else {
		printk("msp3400: main sound carrier: %d.%03d MHz\n",
		       msp->main/910000,(msp->main/910)%1000);
	}
	if (msp->mode == MSP_MODE_FM_NICAM1 ||
	    msp->mode == MSP_MODE_FM_NICAM2)
		printk("msp3400: NICAM carrier     : %d.%03d MHz\n",
		       msp->second/910000,(msp->second/910)%1000);
	if (msp->mode == MSP_MODE_FM_TERRA &&
	    msp->main != msp->second) {
		printk("msp3400: FM-stereo carrier : %d.%03d MHz\n",
		       msp->second/910000,(msp->second/910)%1000);
	}
}

/* ----------------------------------------------------------------------- */

struct REGISTER_DUMP {
	int   addr;
	char *name;
};

struct REGISTER_DUMP d1[] = {
	{ 0x007e, "autodetect" },
	{ 0x0023, "C_AD_BITS " },
	{ 0x0038, "ADD_BITS  " },
	{ 0x003e, "CIB_BITS  " },
	{ 0x0057, "ERROR_RATE" },
};

/*
 * A kernel thread for msp3400 control -- we don't want to block the
 * in the ioctl while doing the sound carrier & stereo detect
 */

static void msp3400c_stereo_wake(unsigned long data)
{
	struct msp3400c *msp = (struct msp3400c*)data;   /* XXX alpha ??? */

	wake_up_interruptible(&msp->wq);
}

static int msp3400c_thread(void *data)
{
	struct msp3400c *msp = data;
    
	struct CARRIER_DETECT *cd;
	int                   count, max1,max2,val1,val2, val,this;
	int                   newstereo;
	LOCK_FLAGS;
    
#ifdef __SMP__
	lock_kernel();
#endif
    
	exit_mm(current);
	current->session = 1;
	current->pgrp = 1;
	sigfillset(&current->blocked);
	current->fs->umask = 0;
	strcpy(current->comm,"msp3400");

	msp->thread = current;

#ifdef __SMP__
	unlock_kernel();
#endif

	dprintk("msp3400: thread: start\n");
	if(msp->notify != NULL)
		up(msp->notify);
		
	for (;;) {
		if (msp->rmmod)
			goto done;
		if (debug > 1)
			printk("msp3400: thread: sleep\n");
		interruptible_sleep_on(&msp->wq);
		if (debug > 1)
			printk("msp3400: thread: wakeup\n");
		if (msp->rmmod || signal_pending(current))
			goto done;

		if (VIDEO_MODE_RADIO == msp->norm)
			continue;  /* nothing to do */
	
		msp->active = 1;

		if (msp->watch_stereo) {
			/* do that stereo/multilang handling */
			LOCK_I2C_BUS(msp->bus);
			newstereo = msp->stereo;
			switch (msp->mode) {
			case MSP_MODE_FM_TERRA:
				val = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x18);
				dprintk("msp3400: stereo detect register: %d\n",val);
		
				if (val > 4096) {
					newstereo = VIDEO_SOUND_STEREO;
				} else if (val < -4096) {
					newstereo = VIDEO_SOUND_LANG1;
				} else {
					newstereo = VIDEO_SOUND_MONO;
				}
				break;
			case MSP_MODE_FM_NICAM1:
			case MSP_MODE_FM_NICAM2:
				val = msp3400c_read(msp->bus, I2C_MSP3400C_DEM, 0x23);
				switch ((val & 0x1e) >> 1)  {
				case 0:
				case 8:
					newstereo = VIDEO_SOUND_STEREO;
					break;
				default:
					newstereo = VIDEO_SOUND_MONO;
					break;
				}
				break;
			}
			if (msp->stereo != newstereo) {
				dprintk("msp3400: watch: stereo %d ==> %d\n",
					msp->stereo,newstereo);
				msp3400c_setstereo(msp,newstereo);
			}
			UNLOCK_I2C_BUS(msp->bus);
			if (msp->watch_stereo) {
				del_timer(&msp->wake_stereo);
				msp->wake_stereo.expires = jiffies + 5*HZ;
				add_timer(&msp->wake_stereo);
			}

			msp->active = 0;
			continue;
		}
	
	restart:
		LOCK_I2C_BUS(msp->bus);
		msp3400c_setvolume(msp->bus, 0, 0);
		msp3400c_setmode(msp, MSP_MODE_AM_DETECT);
		val1 = val2 = 0;
		max1 = max2 = -1;
		del_timer(&msp->wake_stereo);
		msp->watch_stereo = 0;

		/* carrier detect pass #1 -- main carrier */
		cd = carrier_detect_main; count = CARRIER_COUNT(carrier_detect_main);
		for (this = 0; this < count; this++) {
			msp3400c_setcarrier(msp->bus, cd[this].cdo,cd[this].cdo);
			UNLOCK_I2C_BUS(msp->bus);

			current->state   = TASK_INTERRUPTIBLE;
			schedule_timeout(HZ/25);
			if (signal_pending(current))
				goto done;
			if (msp->restart) {
				msp->restart = 0;
				goto restart;
			}

			LOCK_I2C_BUS(msp->bus);
			val = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1b);
			if (val1 < val)
				val1 = val, max1 = this;
			dprintk("msp3400: carrier1 val: %5d / %s\n", val,cd[this].name);
		}

		/* carrier detect pass #2 -- second (stereo) carrier */
		switch (max1) {
		case 1: /* 5.5 */
			cd = carrier_detect_55; count = CARRIER_COUNT(carrier_detect_55);
			break;
		case 3: /* 6.5 */
			cd = carrier_detect_65; count = CARRIER_COUNT(carrier_detect_65);
			break;
		case 0: /* 4.5 */
		case 2: /* 6.0 */
		default:
			cd = NULL; count = 0;
			break;
		}
		for (this = 0; this < count; this++) {
			msp3400c_setcarrier(msp->bus, cd[this].cdo,cd[this].cdo);
			UNLOCK_I2C_BUS(msp->bus);

			current->state   = TASK_INTERRUPTIBLE;
			schedule_timeout(HZ/25);
			if (signal_pending(current))
				goto done;
			if (msp->restart) {
				msp->restart = 0;
				goto restart;
			}

			LOCK_I2C_BUS(msp->bus);
			val = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1b);
			if (val2 < val)
				val2 = val, max2 = this;
			dprintk("msp3400: carrier2 val: %5d / %s\n", val,cd[this].name);
		}

		/* programm the msp3400 according to the results */
		msp->main   = carrier_detect_main[max1].cdo;
		switch (max1) {
		case 1: /* 5.5 */
			if (max2 == 0) {
				/* B/G FM-stereo */
				msp->second = carrier_detect_55[max2].cdo;
				msp3400c_setmode(msp, MSP_MODE_FM_TERRA);
				msp3400c_setstereo(msp, VIDEO_SOUND_MONO);
				msp->watch_stereo = 1;
			} else if (max2 == 1 && msp->nicam) {
				/* B/G NICAM */
				msp->second = carrier_detect_55[max2].cdo;
				msp3400c_setmode(msp, MSP_MODE_FM_NICAM1);
				msp3400c_setcarrier(msp->bus, msp->second, msp->main);
				msp->watch_stereo = 1;
			} else {
				goto no_second;
			}
			break;
		case 2: /* 6.0 */
			/* PAL I NICAM */
			msp->second = MSP_CARRIER(6.552);
			msp3400c_setmode(msp, MSP_MODE_FM_NICAM2);
			msp3400c_setcarrier(msp->bus, msp->second, msp->main);
			msp->watch_stereo = 1;
			break;
		case 3: /* 6.5 */
			if (max2 == 1 || max2 == 2) {
				/* D/K FM-stereo */
				msp->second = carrier_detect_65[max2].cdo;
				msp3400c_setmode(msp, MSP_MODE_FM_TERRA);
				msp3400c_setstereo(msp, VIDEO_SOUND_MONO);
				msp->watch_stereo = 1;
			} else if (max2 == 0 && msp->nicam) {
				/* D/K NICAM */
				msp->second = carrier_detect_65[max2].cdo;
				msp3400c_setmode(msp, MSP_MODE_FM_NICAM1);
				msp3400c_setcarrier(msp->bus, msp->second, msp->main);
				msp->watch_stereo = 1;
			} else {
				goto no_second;
			}
			break;
		case 0: /* 4.5 */
		default:
		no_second:
			msp->second = carrier_detect_main[max1].cdo;
			msp3400c_setmode(msp, MSP_MODE_FM_TERRA);
			msp3400c_setcarrier(msp->bus, msp->second, msp->main);
			break;
		}

		/* unmute */
		msp3400c_setvolume(msp->bus, msp->left, msp->right);
		UNLOCK_I2C_BUS(msp->bus);

		if (msp->watch_stereo) {
			del_timer(&msp->wake_stereo);
			msp->wake_stereo.expires = jiffies + 2*HZ;
			add_timer(&msp->wake_stereo);
		}

		if (debug)
			msp3400c_print_mode(msp);
		
		msp->active = 0;
	}

done:
	dprintk("msp3400: thread: exit\n");
	msp->active = 0;
	msp->thread = NULL;

	if(msp->notify != NULL)
		up(msp->notify);
	return 0;
}


#if 0 /* not finished yet */

static int msp3410d_thread(void *data)
{
	unsigned long flags;
	struct msp3400c *msp = data;
	DECLARE_MUTEX_LOCKED(sem);
	int              i, val;

	/* lock_kernel(); */
    
	exit_mm(current);
	current->session = 1;
	current->pgrp = 1;
	sigfillset(&current->blocked);
	current->fs->umask = 0;
	strcpy(current->comm,"msp3410 (nicam)");

	msp->wait   = &sem;
	msp->thread = current;

	/* unlock_kernel(); */

	dprintk("msp3410: thread: start\n");
	if(msp->notify != NULL)
		up(msp->notify);
		
	for (;;) {
		if (msp->rmmod)
			goto done;
		dprintk("msp3410: thread: sleep\n");
		down_interruptible(&sem);
		dprintk("msp3410: thread: wakeup\n");
		if (msp->rmmod)
			goto done;
	
		if (VIDEO_MODE_RADIO == msp->norm)
			continue;  /* nothing to do */
	
		msp->active = 1;

	restart:
		LOCK_I2C_BUS(msp->bus);
		/* mute */
		msp3400c_setvolume(msp->bus, 0);
		/* quick & dirty hack:
		   get the audio proccessor into some useful state */
		msp3400c_setmode(msp, MSP_MODE_FM_NICAM1);
		/* kick autodetect */
		msp3400c_write(msp->bus, I2C_MSP3400C_DFP, 0x20, 0x01);
		msp3400c_write(msp->bus, I2C_MSP3400C_DFP, 0x21, 0x01);
		UNLOCK_I2C_BUS(msp->bus);

		/* wait 1 sec */
		__set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(HZ);
		if (signal_pending(current))
			goto done;
		if (msp->restart) {
			msp->restart = 0;
			goto restart;
		}
	
		LOCK_I2C_BUS(msp->bus);
		/* debug register dump */
		for (i = 0; i < sizeof(d1)/sizeof(struct REGISTER_DUMP); i++) {
			val = msp3400c_read(msp->bus,I2C_MSP3400C_DEM,d1[i].addr);
			printk(KERN_DEBUG "msp3400: %s = 0x%x\n",d1[i].name,val);
		}	
		/* unmute */
		msp3400c_setvolume(msp->bus, msp->volume);
		UNLOCK_I2C_BUS(msp->bus);

		msp->active = 0;
	}

done:
	dprintk("msp3410: thread: exit\n");
	msp->wait   = NULL;
	msp->active = 0;
	msp->thread = NULL;

	if(msp->notify != NULL)
		up(msp->notify);
	return 0;
}
#endif

/* ----------------------------------------------------------------------- */
/* mixer stuff -- with the modular sound driver in 2.1.x we can easily     */
/* register the msp3400 as mixer device                                    */

#ifdef REGISTER_MIXER

#include <linux/sound.h>
#include <linux/soundcard.h>
#include <asm/uaccess.h>

static struct msp3400c *mspmix = NULL;  /* ugly hack, should do something more sensible */
static int mixer_num;
static int mixer_modcnt = 0;
static DECLARE_MUTEX(mixer_sem);

static int mix_to_v4l(int i)
{
	int r;

	r = ((i & 0xff) * 65536 + 50) / 100;
	if (r > 65535) r = 65535;
	if (r <     0) r =     0;
	return r;
}

static int v4l_to_mix(int i)
{
	int r;

	r = (i * 100 + 32768) / 65536;
	if (r > 100) r = 100;
	if (r <   0) r =   0;
	return r | (r << 8);
}

static int v4l_to_mix2(int l, int r)
{
	r = (r * 100 + 32768) / 65536;
	if (r > 100) r = 100;
	if (r <   0) r =   0;
	l = (l * 100 + 32768) / 65536;
	if (l > 100) l = 100;
	if (l <   0) l =   0;
	return (r << 8) | l;
}

static int
msp3400c_mixer_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	int ret,val = 0;
	LOCK_FLAGS;

        if (cmd == SOUND_MIXER_INFO) {
                mixer_info info;
                strncpy(info.id, "MSP3400", sizeof(info.id));
                strncpy(info.name, "MSP 3400", sizeof(info.name));
                info.modify_counter = mixer_modcnt;
                if (copy_to_user((void *)arg, &info, sizeof(info)))
                        return -EFAULT;
                return 0;
        }
        if (cmd == SOUND_OLD_MIXER_INFO) {
                _old_mixer_info info;
                strncpy(info.id, "MSP3400", sizeof(info.id));
                strncpy(info.name, "MSP 3400", sizeof(info.name));
                if (copy_to_user((void *)arg, &info, sizeof(info)))
                        return -EFAULT;
                return 0;
        }
        if (cmd == OSS_GETVERSION)
                return put_user(SOUND_VERSION, (int *)arg);

	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
		if (get_user(val, (int *)arg))
			return -EFAULT;
    
	down(&mixer_sem);
	if (!mspmix) {
		up(&mixer_sem);
		return -ENODEV;
	}

	switch (cmd) {
	case MIXER_READ(SOUND_MIXER_RECMASK):
	case MIXER_READ(SOUND_MIXER_CAPS):
	case MIXER_READ(SOUND_MIXER_RECSRC):
	case MIXER_WRITE(SOUND_MIXER_RECSRC):
		ret = 0;
		break;

	case MIXER_READ(SOUND_MIXER_STEREODEVS):
		ret = SOUND_MASK_VOLUME;
		break;
	case MIXER_READ(SOUND_MIXER_DEVMASK):
		ret = SOUND_MASK_VOLUME | SOUND_MASK_BASS | SOUND_MASK_TREBLE;
		break;

	case MIXER_WRITE(SOUND_MIXER_VOLUME):
		mspmix->left  = mix_to_v4l(val);
		mspmix->right = mix_to_v4l(val >> 8);
		LOCK_I2C_BUS(mspmix->bus);
		msp3400c_setvolume(mspmix->bus,mspmix->left,mspmix->right);
		UNLOCK_I2C_BUS(mspmix->bus);
		mixer_modcnt++;
		/* fall */
	case MIXER_READ(SOUND_MIXER_VOLUME):
		ret = v4l_to_mix2(mspmix->left, mspmix->right);
		break;

	case MIXER_WRITE(SOUND_MIXER_BASS):
		mspmix->bass = mix_to_v4l(val);
		LOCK_I2C_BUS(mspmix->bus);
		msp3400c_setbass(mspmix->bus,mspmix->bass);
		UNLOCK_I2C_BUS(mspmix->bus);
		mixer_modcnt++;
		/* fall */
	case MIXER_READ(SOUND_MIXER_BASS):
		ret = v4l_to_mix(mspmix->bass);
		break;

	case MIXER_WRITE(SOUND_MIXER_TREBLE):
		mspmix->treble = mix_to_v4l(val);
		LOCK_I2C_BUS(mspmix->bus);
		msp3400c_settreble(mspmix->bus,mspmix->treble);
		UNLOCK_I2C_BUS(mspmix->bus);
		mixer_modcnt++;
		/* fall */
	case MIXER_READ(SOUND_MIXER_TREBLE):
		ret = v4l_to_mix(mspmix->treble);
		break;

	default:
		up(&mixer_sem);
		return -EINVAL;
	}
	up(&mixer_sem);
	if (put_user(ret, (int *)arg))
		return -EFAULT;
	return 0;
}

static int
msp3400c_mixer_open(struct inode *inode, struct file *file)
{
        MOD_INC_USE_COUNT;
        return 0;
}

static int
msp3400c_mixer_release(struct inode *inode, struct file *file)
{
        MOD_DEC_USE_COUNT;
        return 0;
}

static loff_t
msp3400c_mixer_llseek(struct file *file, loff_t offset, int origin)
{
        return -ESPIPE;
}

static /*const*/ struct file_operations msp3400c_mixer_fops = {
        msp3400c_mixer_llseek,
        NULL,  /* read */
        NULL,  /* write */
        NULL,  /* readdir */
        NULL,  /* poll */
        msp3400c_mixer_ioctl,
        NULL,  /* mmap */
        msp3400c_mixer_open,
	NULL,
        msp3400c_mixer_release,
        NULL,  /* fsync */
        NULL,  /* fasync */
        NULL,  /* check_media_change */
        NULL,  /* revalidate */
        NULL,  /* lock */
};

#endif

/* ----------------------------------------------------------------------- */

static int msp3400c_attach(struct i2c_device *device)
{
	DECLARE_MUTEX_LOCKED(sem);
	struct msp3400c *msp;
	int              rev1,rev2;
	LOCK_FLAGS;

	device->data = msp = kmalloc(sizeof(struct msp3400c),GFP_KERNEL);
	if (NULL == msp)
		return -ENOMEM;
	memset(msp,0,sizeof(struct msp3400c));
	msp->bus = device->bus;
	msp->left   = 65535;
	msp->right  = 65535;
	msp->bass   = 32768;
	msp->treble = 32768;
	init_waitqueue_head(&msp->wq);

	LOCK_I2C_BUS(msp->bus);
	if (-1 == msp3400c_reset(msp->bus)) {
		UNLOCK_I2C_BUS(msp->bus);
		kfree(msp);
		dprintk("msp3400: no chip found\n");
		return -1;
	}
    
	rev1 = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1e);
	rev2 = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1f);
	if (0 == rev1 && 0 == rev2) {
		UNLOCK_I2C_BUS(msp->bus);
		kfree(msp);
		printk("msp3400: error while reading chip version\n");
		return -1;
	}

	msp3400c_setmode(msp, MSP_MODE_FM_TERRA);
	msp3400c_setvolume(msp->bus, msp->left, msp->right);
	msp3400c_setbass(msp->bus, msp->bass);
	msp3400c_settreble(msp->bus, msp->treble);
    
#if 0
	/* this will turn on a 1kHz beep - might be useful for debugging... */
	msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0014, 0x1040);
#endif
	UNLOCK_I2C_BUS(msp->bus);

	sprintf(device->name,"MSP34%02d%c-%c%d",
		(rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
	msp->nicam = (((rev2>>8)&0xff) != 00) ? 1 : 0;

	/* timer for stereo checking */
	msp->wake_stereo.function = msp3400c_stereo_wake;
	msp->wake_stereo.data     = (unsigned long)msp;

	/* startup control thread */
	MOD_INC_USE_COUNT;
	msp->notify = &sem;
	kernel_thread(msp3400c_thread, (void *)msp, 0);
	down(&sem);
	msp->notify = NULL;
	wake_up_interruptible(&msp->wq);

	printk(KERN_INFO "msp3400: init: chip=%s",device->name);
	if (msp->nicam)
		printk(", has NICAM support");
#ifdef REGISTER_MIXER
	down(&mixer_sem);
	mspmix = msp;
	up(&mixer_sem);
#endif
	printk("\n");
	return 0;
}

static int msp3400c_detach(struct i2c_device *device)
{
	DECLARE_MUTEX_LOCKED(sem);
	struct msp3400c *msp  = (struct msp3400c*)device->data;
	LOCK_FLAGS;
    
#ifdef REGISTER_MIXER
	down(&mixer_sem);
	mspmix = NULL;
	up(&mixer_sem);
#endif

	/* shutdown control thread */
	del_timer(&msp->wake_stereo);
	if (msp->thread) 
	{
		msp->notify = &sem;
		msp->rmmod = 1;
		wake_up_interruptible(&msp->wq);
		down(&sem);
		msp->notify = NULL;
	}
    
	LOCK_I2C_BUS(msp->bus);
	msp3400c_reset(msp->bus);
	UNLOCK_I2C_BUS(msp->bus);

	kfree(msp);
	MOD_DEC_USE_COUNT;
	return 0;
}

static int msp3400c_command(struct i2c_device *device,
		 unsigned int cmd, void *arg)
{
	struct msp3400c *msp  = (struct msp3400c*)device->data;
	int             *iarg = (int*)arg;
        __u16           *sarg = arg;
	LOCK_FLAGS;

	switch (cmd) {
	case MSP_SET_RADIO:
		msp->norm = VIDEO_MODE_RADIO;
		msp->watch_stereo=0;
		del_timer(&msp->wake_stereo);
		LOCK_I2C_BUS(msp->bus);
		msp3400c_setmode(msp,MSP_MODE_FM_RADIO);
		msp3400c_setcarrier(msp->bus, MSP_CARRIER(10.7),MSP_CARRIER(10.7));
		msp3400c_setvolume(msp->bus,msp->left, msp->right);
		UNLOCK_I2C_BUS(msp->bus);
		break;
	case MSP_SET_TVNORM:
		msp->norm = *iarg;
		break;
	case MSP_SWITCH_MUTE:
		/* channels switching step one -- mute */
		msp->watch_stereo=0;
		del_timer(&msp->wake_stereo);
		LOCK_I2C_BUS(msp->bus);
		msp3400c_setvolume(msp->bus,0,0);
		UNLOCK_I2C_BUS(msp->bus);
		break;
	case MSP_NEWCHANNEL:
		/* channels switching step two -- trigger sound carrier scan */
		msp->watch_stereo=0;
		del_timer(&msp->wake_stereo);
		if (msp->active)
			msp->restart = 1;
		wake_up_interruptible(&msp->wq);
		break;

	case MSP_GET_VOLUME:
		*sarg = (msp->left > msp->right) ? msp->left : msp->right;
		break;
	case MSP_SET_VOLUME:
		msp->left = msp->right = *sarg;
		LOCK_I2C_BUS(msp->bus);
		msp3400c_setvolume(msp->bus,msp->left, msp->right);
		UNLOCK_I2C_BUS(msp->bus);
		break;

	case MSP_GET_BASS:
		*sarg = msp->bass;
		break;
	case MSP_SET_BASS:
		msp->bass = *sarg;
		LOCK_I2C_BUS(msp->bus);
		msp3400c_setbass(msp->bus,msp->bass);
		UNLOCK_I2C_BUS(msp->bus);
		break;

	case MSP_GET_TREBLE:
		*sarg = msp->treble;
		break;
	case MSP_SET_TREBLE:
		msp->treble = *sarg;
		LOCK_I2C_BUS(msp->bus);
		msp3400c_settreble(msp->bus,msp->treble);
		UNLOCK_I2C_BUS(msp->bus);
		break;

	case MSP_GET_STEREO:
		*sarg = msp->stereo;
		break;
	case MSP_SET_STEREO:
		if (*sarg) {
			msp->watch_stereo=0;
			del_timer(&msp->wake_stereo);
			LOCK_I2C_BUS(msp->bus);
			msp3400c_setstereo(msp,*sarg);
			UNLOCK_I2C_BUS(msp->bus);
		}
		break;

	case MSP_GET_DC:
		LOCK_I2C_BUS(msp->bus);
		*sarg = ((int)msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1b) +
			 (int)msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1c));
		UNLOCK_I2C_BUS(msp->bus);
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

/* ----------------------------------------------------------------------- */

struct i2c_driver i2c_driver_msp = {
	"msp3400",                    /* name       */
	I2C_DRIVERID_MSP3400,         /* ID         */
	I2C_MSP3400C, I2C_MSP3400C,   /* addr range */

	msp3400c_attach,
	msp3400c_detach,
	msp3400c_command
};

#ifdef MODULE
int init_module(void)
#else
     int msp3400c_init(void)
#endif
{
	i2c_register_driver(&i2c_driver_msp);
#ifdef REGISTER_MIXER
	if ((mixer_num = register_sound_mixer(&msp3400c_mixer_fops, -1)) < 0)
		printk(KERN_ERR "msp3400c: cannot allocate mixer device\n");
#endif
	return 0;
}

#ifdef MODULE
void cleanup_module(void)
{
	i2c_unregister_driver(&i2c_driver_msp);
#ifdef REGISTER_MIXER
	if (mixer_num >= 0)
		unregister_sound_mixer(mixer_num);
#endif
}
#endif

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * End:
 */