summaryrefslogtreecommitdiff
path: root/drivers/media/dvb-frontends/cx24117.c
blob: d37cb7762bd6dc2fbd50dea573579a4f2960d10d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
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
/*
    Conexant cx24117/cx24132 - Dual DVBS/S2 Satellite demod/tuner driver

    Copyright (C) 2013 Luis Alves <ljalvs@gmail.com>
	July, 6th 2013
	    First release based on cx24116 driver by:
	    Steven Toth and Georg Acher, Darron Broad, Igor Liplianin
	    Cards currently supported:
		TBS6980 - Dual DVBS/S2 PCIe card
		TBS6981 - Dual DVBS/S2 PCIe card

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/firmware.h>

#include "tuner-i2c.h"
#include "dvb_frontend.h"
#include "cx24117.h"


#define CX24117_DEFAULT_FIRMWARE "dvb-fe-cx24117.fw"
#define CX24117_SEARCH_RANGE_KHZ 5000

/* known registers */
#define CX24117_REG_COMMAND      (0x00)      /* command buffer */
#define CX24117_REG_EXECUTE      (0x1f)      /* execute command */

#define CX24117_REG_FREQ3_0      (0x34)      /* frequency */
#define CX24117_REG_FREQ2_0      (0x35)
#define CX24117_REG_FREQ1_0      (0x36)
#define CX24117_REG_STATE0       (0x39)
#define CX24117_REG_SSTATUS0     (0x3a)      /* demod0 signal high / status */
#define CX24117_REG_SIGNAL0      (0x3b)
#define CX24117_REG_FREQ5_0      (0x3c)      /* +-freq */
#define CX24117_REG_FREQ6_0      (0x3d)
#define CX24117_REG_SRATE2_0     (0x3e)      /* +- 1000 * srate */
#define CX24117_REG_SRATE1_0     (0x3f)
#define CX24117_REG_QUALITY2_0   (0x40)
#define CX24117_REG_QUALITY1_0   (0x41)

#define CX24117_REG_BER4_0       (0x47)
#define CX24117_REG_BER3_0       (0x48)
#define CX24117_REG_BER2_0       (0x49)
#define CX24117_REG_BER1_0       (0x4a)
#define CX24117_REG_DVBS_UCB2_0  (0x4b)
#define CX24117_REG_DVBS_UCB1_0  (0x4c)
#define CX24117_REG_DVBS2_UCB2_0 (0x50)
#define CX24117_REG_DVBS2_UCB1_0 (0x51)
#define CX24117_REG_QSTATUS0     (0x93)
#define CX24117_REG_CLKDIV0      (0xe6)
#define CX24117_REG_RATEDIV0     (0xf0)


#define CX24117_REG_FREQ3_1      (0x55)      /* frequency */
#define CX24117_REG_FREQ2_1      (0x56)
#define CX24117_REG_FREQ1_1      (0x57)
#define CX24117_REG_STATE1       (0x5a)
#define CX24117_REG_SSTATUS1     (0x5b)      /* demod1 signal high / status */
#define CX24117_REG_SIGNAL1      (0x5c)
#define CX24117_REG_FREQ5_1      (0x5d)      /* +- freq */
#define CX24117_REG_FREQ4_1      (0x5e)
#define CX24117_REG_SRATE2_1     (0x5f)
#define CX24117_REG_SRATE1_1     (0x60)
#define CX24117_REG_QUALITY2_1   (0x61)
#define CX24117_REG_QUALITY1_1   (0x62)
#define CX24117_REG_BER4_1       (0x68)
#define CX24117_REG_BER3_1       (0x69)
#define CX24117_REG_BER2_1       (0x6a)
#define CX24117_REG_BER1_1       (0x6b)
#define CX24117_REG_DVBS_UCB2_1  (0x6c)
#define CX24117_REG_DVBS_UCB1_1  (0x6d)
#define CX24117_REG_DVBS2_UCB2_1 (0x71)
#define CX24117_REG_DVBS2_UCB1_1 (0x72)
#define CX24117_REG_QSTATUS1     (0x9f)
#define CX24117_REG_CLKDIV1      (0xe7)
#define CX24117_REG_RATEDIV1     (0xf1)


/* arg buffer size */
#define CX24117_ARGLEN       (0x1e)

/* rolloff */
#define CX24117_ROLLOFF_020  (0x00)
#define CX24117_ROLLOFF_025  (0x01)
#define CX24117_ROLLOFF_035  (0x02)

/* pilot bit */
#define CX24117_PILOT_OFF    (0x00)
#define CX24117_PILOT_ON     (0x40)
#define CX24117_PILOT_AUTO   (0x80)

/* signal status */
#define CX24117_HAS_SIGNAL   (0x01)
#define CX24117_HAS_CARRIER  (0x02)
#define CX24117_HAS_VITERBI  (0x04)
#define CX24117_HAS_SYNCLOCK (0x08)
#define CX24117_STATUS_MASK  (0x0f)
#define CX24117_SIGNAL_MASK  (0xc0)


/* arg offset for DiSEqC */
#define CX24117_DISEQC_DEMOD  (1)
#define CX24117_DISEQC_BURST  (2)
#define CX24117_DISEQC_ARG3_2 (3)   /* unknown value=2 */
#define CX24117_DISEQC_ARG4_0 (4)   /* unknown value=0 */
#define CX24117_DISEQC_ARG5_0 (5)   /* unknown value=0 */
#define CX24117_DISEQC_MSGLEN (6)
#define CX24117_DISEQC_MSGOFS (7)

/* DiSEqC burst */
#define CX24117_DISEQC_MINI_A (0)
#define CX24117_DISEQC_MINI_B (1)


#define CX24117_PNE	(0) /* 0 disabled / 2 enabled */
#define CX24117_OCC	(1) /* 0 disabled / 1 enabled */


enum cmds {
	CMD_SET_VCOFREQ    = 0x10,
	CMD_TUNEREQUEST    = 0x11,
	CMD_GLOBAL_MPEGCFG = 0x13,
	CMD_MPEGCFG        = 0x14,
	CMD_TUNERINIT      = 0x15,
	CMD_GET_SRATE      = 0x18,
	CMD_SET_GOLDCODE   = 0x19,
	CMD_GET_AGCACC     = 0x1a,
	CMD_DEMODINIT      = 0x1b,
	CMD_GETCTLACC      = 0x1c,

	CMD_LNBCONFIG      = 0x20,
	CMD_LNBSEND        = 0x21,
	CMD_LNBDCLEVEL     = 0x22,
	CMD_LNBPCBCONFIG   = 0x23,
	CMD_LNBSENDTONEBST = 0x24,
	CMD_LNBUPDREPLY    = 0x25,

	CMD_SET_GPIOMODE   = 0x30,
	CMD_SET_GPIOEN     = 0x31,
	CMD_SET_GPIODIR    = 0x32,
	CMD_SET_GPIOOUT    = 0x33,
	CMD_ENABLERSCORR   = 0x34,
	CMD_FWVERSION      = 0x35,
	CMD_SET_SLEEPMODE  = 0x36,
	CMD_BERCTRL        = 0x3c,
	CMD_EVENTCTRL      = 0x3d,
};

static LIST_HEAD(hybrid_tuner_instance_list);
static DEFINE_MUTEX(cx24117_list_mutex);

/* The Demod/Tuner can't easily provide these, we cache them */
struct cx24117_tuning {
	u32 frequency;
	u32 symbol_rate;
	enum fe_spectral_inversion inversion;
	enum fe_code_rate fec;

	enum fe_delivery_system delsys;
	enum fe_modulation modulation;
	enum fe_pilot pilot;
	enum fe_rolloff rolloff;

	/* Demod values */
	u8 fec_val;
	u8 fec_mask;
	u8 inversion_val;
	u8 pilot_val;
	u8 rolloff_val;
};

/* Basic commands that are sent to the firmware */
struct cx24117_cmd {
	u8 len;
	u8 args[CX24117_ARGLEN];
};

/* common to both fe's */
struct cx24117_priv {
	u8 demod_address;
	struct i2c_adapter *i2c;
	u8 skip_fw_load;
	struct mutex fe_lock;

	/* Used for sharing this struct between demods */
	struct tuner_i2c_props i2c_props;
	struct list_head hybrid_tuner_instance_list;
};

/* one per each fe */
struct cx24117_state {
	struct cx24117_priv *priv;
	struct dvb_frontend frontend;

	struct cx24117_tuning dcur;
	struct cx24117_tuning dnxt;
	struct cx24117_cmd dsec_cmd;

	int demod;
};

/* modfec (modulation and FEC) lookup table */
/* Check cx24116.c for a detailed description of each field */
static struct cx24117_modfec {
	enum fe_delivery_system delivery_system;
	enum fe_modulation modulation;
	enum fe_code_rate fec;
	u8 mask;	/* In DVBS mode this is used to autodetect */
	u8 val;		/* Passed to the firmware to indicate mode selection */
} cx24117_modfec_modes[] = {
	/* QPSK. For unknown rates we set hardware to auto detect 0xfe 0x30 */

	/*mod   fec       mask  val */
	{ SYS_DVBS, QPSK, FEC_NONE, 0xfe, 0x30 },
	{ SYS_DVBS, QPSK, FEC_1_2,  0x02, 0x2e }, /* 00000010 00101110 */
	{ SYS_DVBS, QPSK, FEC_2_3,  0x04, 0x2f }, /* 00000100 00101111 */
	{ SYS_DVBS, QPSK, FEC_3_4,  0x08, 0x30 }, /* 00001000 00110000 */
	{ SYS_DVBS, QPSK, FEC_4_5,  0xfe, 0x30 }, /* 000?0000 ?        */
	{ SYS_DVBS, QPSK, FEC_5_6,  0x20, 0x31 }, /* 00100000 00110001 */
	{ SYS_DVBS, QPSK, FEC_6_7,  0xfe, 0x30 }, /* 0?000000 ?        */
	{ SYS_DVBS, QPSK, FEC_7_8,  0x80, 0x32 }, /* 10000000 00110010 */
	{ SYS_DVBS, QPSK, FEC_8_9,  0xfe, 0x30 }, /* 0000000? ?        */
	{ SYS_DVBS, QPSK, FEC_AUTO, 0xfe, 0x30 },
	/* NBC-QPSK */
	{ SYS_DVBS2, QPSK, FEC_NONE, 0x00, 0x00 },
	{ SYS_DVBS2, QPSK, FEC_1_2,  0x00, 0x04 },
	{ SYS_DVBS2, QPSK, FEC_3_5,  0x00, 0x05 },
	{ SYS_DVBS2, QPSK, FEC_2_3,  0x00, 0x06 },
	{ SYS_DVBS2, QPSK, FEC_3_4,  0x00, 0x07 },
	{ SYS_DVBS2, QPSK, FEC_4_5,  0x00, 0x08 },
	{ SYS_DVBS2, QPSK, FEC_5_6,  0x00, 0x09 },
	{ SYS_DVBS2, QPSK, FEC_8_9,  0x00, 0x0a },
	{ SYS_DVBS2, QPSK, FEC_9_10, 0x00, 0x0b },
	{ SYS_DVBS2, QPSK, FEC_AUTO, 0x00, 0x00 },
	/* 8PSK */
	{ SYS_DVBS2, PSK_8, FEC_NONE, 0x00, 0x00 },
	{ SYS_DVBS2, PSK_8, FEC_3_5,  0x00, 0x0c },
	{ SYS_DVBS2, PSK_8, FEC_2_3,  0x00, 0x0d },
	{ SYS_DVBS2, PSK_8, FEC_3_4,  0x00, 0x0e },
	{ SYS_DVBS2, PSK_8, FEC_5_6,  0x00, 0x0f },
	{ SYS_DVBS2, PSK_8, FEC_8_9,  0x00, 0x10 },
	{ SYS_DVBS2, PSK_8, FEC_9_10, 0x00, 0x11 },
	{ SYS_DVBS2, PSK_8, FEC_AUTO, 0x00, 0x00 },
	/*
	 * 'val' can be found in the FECSTATUS register when tuning.
	 * FECSTATUS will give the actual FEC in use if tuning was successful.
	 */
};


static int cx24117_writereg(struct cx24117_state *state, u8 reg, u8 data)
{
	u8 buf[] = { reg, data };
	struct i2c_msg msg = { .addr = state->priv->demod_address,
		.flags = 0, .buf = buf, .len = 2 };
	int ret;

	dev_dbg(&state->priv->i2c->dev,
			"%s() demod%d i2c wr @0x%02x=0x%02x\n",
			__func__, state->demod, reg, data);

	ret = i2c_transfer(state->priv->i2c, &msg, 1);
	if (ret < 0) {
		dev_warn(&state->priv->i2c->dev,
			"%s: demod%d i2c wr err(%i) @0x%02x=0x%02x\n",
			KBUILD_MODNAME, state->demod, ret, reg, data);
		return ret;
	}
	return 0;
}

static int cx24117_writecmd(struct cx24117_state *state,
	struct cx24117_cmd *cmd)
{
	struct i2c_msg msg;
	u8 buf[CX24117_ARGLEN+1];
	int ret;

	dev_dbg(&state->priv->i2c->dev,
			"%s() demod%d i2c wr cmd len=%d\n",
			__func__, state->demod, cmd->len);

	buf[0] = CX24117_REG_COMMAND;
	memcpy(&buf[1], cmd->args, cmd->len);

	msg.addr = state->priv->demod_address;
	msg.flags = 0;
	msg.len = cmd->len+1;
	msg.buf = buf;
	ret = i2c_transfer(state->priv->i2c, &msg, 1);
	if (ret < 0) {
		dev_warn(&state->priv->i2c->dev,
			"%s: demod%d i2c wr cmd err(%i) len=%d\n",
			KBUILD_MODNAME, state->demod, ret, cmd->len);
		return ret;
	}
	return 0;
}

static int cx24117_readreg(struct cx24117_state *state, u8 reg)
{
	int ret;
	u8 recv = 0;
	struct i2c_msg msg[] = {
		{ .addr = state->priv->demod_address, .flags = 0,
			.buf = &reg, .len = 1 },
		{ .addr = state->priv->demod_address, .flags = I2C_M_RD,
			.buf = &recv, .len = 1 }
	};

	ret = i2c_transfer(state->priv->i2c, msg, 2);
	if (ret < 0) {
		dev_warn(&state->priv->i2c->dev,
			"%s: demod%d i2c rd err(%d) @0x%x\n",
			KBUILD_MODNAME, state->demod, ret, reg);
		return ret;
	}

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d i2c rd @0x%02x=0x%02x\n",
		__func__, state->demod, reg, recv);

	return recv;
}

static int cx24117_readregN(struct cx24117_state *state,
	u8 reg, u8 *buf, int len)
{
	int ret;
	struct i2c_msg msg[] = {
		{ .addr = state->priv->demod_address, .flags = 0,
			.buf = &reg, .len = 1 },
		{ .addr = state->priv->demod_address, .flags = I2C_M_RD,
			.buf = buf, .len = len }
	};

	ret = i2c_transfer(state->priv->i2c, msg, 2);
	if (ret < 0) {
		dev_warn(&state->priv->i2c->dev,
			"%s: demod%d i2c rd err(%d) @0x%x\n",
			KBUILD_MODNAME, state->demod, ret, reg);
		return ret;
	}
	return 0;
}

static int cx24117_set_inversion(struct cx24117_state *state,
	enum fe_spectral_inversion inversion)
{
	dev_dbg(&state->priv->i2c->dev, "%s(%d) demod%d\n",
		__func__, inversion, state->demod);

	switch (inversion) {
	case INVERSION_OFF:
		state->dnxt.inversion_val = 0x00;
		break;
	case INVERSION_ON:
		state->dnxt.inversion_val = 0x04;
		break;
	case INVERSION_AUTO:
		state->dnxt.inversion_val = 0x0C;
		break;
	default:
		return -EINVAL;
	}

	state->dnxt.inversion = inversion;

	return 0;
}

static int cx24117_lookup_fecmod(struct cx24117_state *state,
	enum fe_delivery_system d, enum fe_modulation m, enum fe_code_rate f)
{
	int i, ret = -EINVAL;

	dev_dbg(&state->priv->i2c->dev,
		"%s(demod(0x%02x,0x%02x) demod%d\n",
		__func__, m, f, state->demod);

	for (i = 0; i < ARRAY_SIZE(cx24117_modfec_modes); i++) {
		if ((d == cx24117_modfec_modes[i].delivery_system) &&
			(m == cx24117_modfec_modes[i].modulation) &&
			(f == cx24117_modfec_modes[i].fec)) {
				ret = i;
				break;
			}
	}

	return ret;
}

static int cx24117_set_fec(struct cx24117_state *state,
			   enum fe_delivery_system delsys,
			   enum fe_modulation mod,
			   enum fe_code_rate fec)
{
	int ret;

	dev_dbg(&state->priv->i2c->dev,
		"%s(0x%02x,0x%02x) demod%d\n",
		__func__, mod, fec, state->demod);

	ret = cx24117_lookup_fecmod(state, delsys, mod, fec);
	if (ret < 0)
		return ret;

	state->dnxt.fec = fec;
	state->dnxt.fec_val = cx24117_modfec_modes[ret].val;
	state->dnxt.fec_mask = cx24117_modfec_modes[ret].mask;
	dev_dbg(&state->priv->i2c->dev,
		"%s() demod%d mask/val = 0x%02x/0x%02x\n", __func__,
		state->demod, state->dnxt.fec_mask, state->dnxt.fec_val);

	return 0;
}

static int cx24117_set_symbolrate(struct cx24117_state *state, u32 rate)
{
	dev_dbg(&state->priv->i2c->dev, "%s(%d) demod%d\n",
		__func__, rate, state->demod);

	state->dnxt.symbol_rate = rate;

	dev_dbg(&state->priv->i2c->dev,
		"%s() demod%d symbol_rate = %d\n",
		__func__, state->demod, rate);

	return 0;
}

static int cx24117_load_firmware(struct dvb_frontend *fe,
	const struct firmware *fw);

static int cx24117_firmware_ondemand(struct dvb_frontend *fe)
{
	struct cx24117_state *state = fe->demodulator_priv;
	const struct firmware *fw;
	int ret = 0;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d skip_fw_load=%d\n",
		__func__, state->demod, state->priv->skip_fw_load);

	if (state->priv->skip_fw_load)
		return 0;

	/* check if firmware is already running */
	if (cx24117_readreg(state, 0xeb) != 0xa) {
		/* Load firmware */
		/* request the firmware, this will block until loaded */
		dev_dbg(&state->priv->i2c->dev,
			"%s: Waiting for firmware upload (%s)...\n",
			__func__, CX24117_DEFAULT_FIRMWARE);
		ret = request_firmware(&fw, CX24117_DEFAULT_FIRMWARE,
			state->priv->i2c->dev.parent);
		dev_dbg(&state->priv->i2c->dev,
			"%s: Waiting for firmware upload(2)...\n", __func__);
		if (ret) {
			dev_err(&state->priv->i2c->dev,
				"%s: No firmware uploaded (timeout or file not found?)\n",
__func__);
			return ret;
		}

		/* Make sure we don't recurse back through here
		 * during loading */
		state->priv->skip_fw_load = 1;

		ret = cx24117_load_firmware(fe, fw);
		if (ret)
			dev_err(&state->priv->i2c->dev,
				"%s: Writing firmware failed\n", __func__);
		release_firmware(fw);

		dev_info(&state->priv->i2c->dev,
			"%s: Firmware upload %s\n", __func__,
			ret == 0 ? "complete" : "failed");

		/* Ensure firmware is always loaded if required */
		state->priv->skip_fw_load = 0;
	}

	return ret;
}

/* Take a basic firmware command structure, format it
 * and forward it for processing
 */
static int cx24117_cmd_execute_nolock(struct dvb_frontend *fe,
	struct cx24117_cmd *cmd)
{
	struct cx24117_state *state = fe->demodulator_priv;
	int i, ret;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
		__func__, state->demod);

	/* Load the firmware if required */
	ret = cx24117_firmware_ondemand(fe);
	if (ret != 0)
		return ret;

	/* Write the command */
	cx24117_writecmd(state, cmd);

	/* Start execution and wait for cmd to terminate */
	cx24117_writereg(state, CX24117_REG_EXECUTE, 0x01);
	i = 0;
	while (cx24117_readreg(state, CX24117_REG_EXECUTE)) {
		msleep(20);
		if (i++ > 40) {
			/* Avoid looping forever if the firmware does
				not respond */
			dev_warn(&state->priv->i2c->dev,
				"%s() Firmware not responding\n", __func__);
			return -EIO;
		}
	}
	return 0;
}

static int cx24117_cmd_execute(struct dvb_frontend *fe, struct cx24117_cmd *cmd)
{
	struct cx24117_state *state = fe->demodulator_priv;
	int ret;

	mutex_lock(&state->priv->fe_lock);
	ret = cx24117_cmd_execute_nolock(fe, cmd);
	mutex_unlock(&state->priv->fe_lock);

	return ret;
}

static int cx24117_load_firmware(struct dvb_frontend *fe,
	const struct firmware *fw)
{
	struct cx24117_state *state = fe->demodulator_priv;
	struct cx24117_cmd cmd;
	int i, ret;
	unsigned char vers[4];

	struct i2c_msg msg;
	u8 *buf;

	dev_dbg(&state->priv->i2c->dev,
		"%s() demod%d FW is %zu bytes (%02x %02x .. %02x %02x)\n",
		__func__, state->demod, fw->size, fw->data[0], fw->data[1],
		fw->data[fw->size - 2], fw->data[fw->size - 1]);

	cx24117_writereg(state, 0xea, 0x00);
	cx24117_writereg(state, 0xea, 0x01);
	cx24117_writereg(state, 0xea, 0x00);

	cx24117_writereg(state, 0xce, 0x92);

	cx24117_writereg(state, 0xfb, 0x00);
	cx24117_writereg(state, 0xfc, 0x00);

	cx24117_writereg(state, 0xc3, 0x04);
	cx24117_writereg(state, 0xc4, 0x04);

	cx24117_writereg(state, 0xce, 0x00);
	cx24117_writereg(state, 0xcf, 0x00);

	cx24117_writereg(state, 0xea, 0x00);
	cx24117_writereg(state, 0xeb, 0x0c);
	cx24117_writereg(state, 0xec, 0x06);
	cx24117_writereg(state, 0xed, 0x05);
	cx24117_writereg(state, 0xee, 0x03);
	cx24117_writereg(state, 0xef, 0x05);

	cx24117_writereg(state, 0xf3, 0x03);
	cx24117_writereg(state, 0xf4, 0x44);

	cx24117_writereg(state, CX24117_REG_RATEDIV0, 0x04);
	cx24117_writereg(state, CX24117_REG_CLKDIV0, 0x02);

	cx24117_writereg(state, CX24117_REG_RATEDIV1, 0x04);
	cx24117_writereg(state, CX24117_REG_CLKDIV1, 0x02);

	cx24117_writereg(state, 0xf2, 0x04);
	cx24117_writereg(state, 0xe8, 0x02);
	cx24117_writereg(state, 0xea, 0x01);
	cx24117_writereg(state, 0xc8, 0x00);
	cx24117_writereg(state, 0xc9, 0x00);
	cx24117_writereg(state, 0xca, 0x00);
	cx24117_writereg(state, 0xcb, 0x00);
	cx24117_writereg(state, 0xcc, 0x00);
	cx24117_writereg(state, 0xcd, 0x00);
	cx24117_writereg(state, 0xe4, 0x03);
	cx24117_writereg(state, 0xeb, 0x0a);

	cx24117_writereg(state, 0xfb, 0x00);
	cx24117_writereg(state, 0xe0, 0x76);
	cx24117_writereg(state, 0xf7, 0x81);
	cx24117_writereg(state, 0xf8, 0x00);
	cx24117_writereg(state, 0xf9, 0x00);

	buf = kmalloc(fw->size + 1, GFP_KERNEL);
	if (buf == NULL) {
		state->priv->skip_fw_load = 0;
		return -ENOMEM;
	}

	/* fw upload reg */
	buf[0] = 0xfa;
	memcpy(&buf[1], fw->data, fw->size);

	/* prepare i2c message to send */
	msg.addr = state->priv->demod_address;
	msg.flags = 0;
	msg.len = fw->size + 1;
	msg.buf = buf;

	/* send fw */
	ret = i2c_transfer(state->priv->i2c, &msg, 1);
	if (ret < 0)
		return ret;

	kfree(buf);

	cx24117_writereg(state, 0xf7, 0x0c);
	cx24117_writereg(state, 0xe0, 0x00);

	/* Init demodulator */
	cmd.args[0] = CMD_DEMODINIT;
	cmd.args[1] = 0x00;
	cmd.args[2] = 0x01;
	cmd.args[3] = 0x00;
	cmd.len = 4;
	ret = cx24117_cmd_execute_nolock(fe, &cmd);
	if (ret != 0)
		goto error;

	/* Set VCO frequency */
	cmd.args[0] = CMD_SET_VCOFREQ;
	cmd.args[1] = 0x06;
	cmd.args[2] = 0x2b;
	cmd.args[3] = 0xd8;
	cmd.args[4] = 0xa5;
	cmd.args[5] = 0xee;
	cmd.args[6] = 0x03;
	cmd.args[7] = 0x9d;
	cmd.args[8] = 0xfc;
	cmd.args[9] = 0x06;
	cmd.args[10] = 0x02;
	cmd.args[11] = 0x9d;
	cmd.args[12] = 0xfc;
	cmd.len = 13;
	ret = cx24117_cmd_execute_nolock(fe, &cmd);
	if (ret != 0)
		goto error;

	/* Tuner init */
	cmd.args[0] = CMD_TUNERINIT;
	cmd.args[1] = 0x00;
	cmd.args[2] = 0x01;
	cmd.args[3] = 0x00;
	cmd.args[4] = 0x00;
	cmd.args[5] = 0x01;
	cmd.args[6] = 0x01;
	cmd.args[7] = 0x01;
	cmd.args[8] = 0x00;
	cmd.args[9] = 0x05;
	cmd.args[10] = 0x02;
	cmd.args[11] = 0x02;
	cmd.args[12] = 0x00;
	cmd.len = 13;
	ret = cx24117_cmd_execute_nolock(fe, &cmd);
	if (ret != 0)
		goto error;

	/* Global MPEG config */
	cmd.args[0] = CMD_GLOBAL_MPEGCFG;
	cmd.args[1] = 0x00;
	cmd.args[2] = 0x00;
	cmd.args[3] = 0x00;
	cmd.args[4] = 0x01;
	cmd.args[5] = 0x00;
	cmd.len = 6;
	ret = cx24117_cmd_execute_nolock(fe, &cmd);
	if (ret != 0)
		goto error;

	/* MPEG config for each demod */
	for (i = 0; i < 2; i++) {
		cmd.args[0] = CMD_MPEGCFG;
		cmd.args[1] = (u8) i;
		cmd.args[2] = 0x00;
		cmd.args[3] = 0x05;
		cmd.args[4] = 0x00;
		cmd.args[5] = 0x00;
		cmd.args[6] = 0x55;
		cmd.args[7] = 0x00;
		cmd.len = 8;
		ret = cx24117_cmd_execute_nolock(fe, &cmd);
		if (ret != 0)
			goto error;
	}

	cx24117_writereg(state, 0xce, 0xc0);
	cx24117_writereg(state, 0xcf, 0x00);
	cx24117_writereg(state, 0xe5, 0x04);

	/* Get firmware version */
	cmd.args[0] = CMD_FWVERSION;
	cmd.len = 2;
	for (i = 0; i < 4; i++) {
		cmd.args[1] = i;
		ret = cx24117_cmd_execute_nolock(fe, &cmd);
		if (ret != 0)
			goto error;
		vers[i] = cx24117_readreg(state, 0x33);
	}
	dev_info(&state->priv->i2c->dev,
		"%s: FW version %i.%i.%i.%i\n", __func__,
		vers[0], vers[1], vers[2], vers[3]);
	return 0;
error:
	state->priv->skip_fw_load = 0;
	dev_err(&state->priv->i2c->dev, "%s() Error running FW.\n", __func__);
	return ret;
}

static int cx24117_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
	struct cx24117_state *state = fe->demodulator_priv;
	int lock;

	lock = cx24117_readreg(state,
		(state->demod == 0) ? CX24117_REG_SSTATUS0 :
				      CX24117_REG_SSTATUS1) &
		CX24117_STATUS_MASK;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d status = 0x%02x\n",
		__func__, state->demod, lock);

	*status = 0;

	if (lock & CX24117_HAS_SIGNAL)
		*status |= FE_HAS_SIGNAL;
	if (lock & CX24117_HAS_CARRIER)
		*status |= FE_HAS_CARRIER;
	if (lock & CX24117_HAS_VITERBI)
		*status |= FE_HAS_VITERBI;
	if (lock & CX24117_HAS_SYNCLOCK)
		*status |= FE_HAS_SYNC | FE_HAS_LOCK;

	return 0;
}

static int cx24117_read_ber(struct dvb_frontend *fe, u32 *ber)
{
	struct cx24117_state *state = fe->demodulator_priv;
	int ret;
	u8 buf[4];
	u8 base_reg = (state->demod == 0) ?
			CX24117_REG_BER4_0 :
			CX24117_REG_BER4_1;

	ret = cx24117_readregN(state, base_reg, buf, 4);
	if (ret != 0)
		return ret;

	*ber = (buf[0] << 24) | (buf[1] << 16) |
		(buf[1] << 8) | buf[0];

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d ber=0x%04x\n",
		__func__, state->demod, *ber);

	return 0;
}

static int cx24117_read_signal_strength(struct dvb_frontend *fe,
	u16 *signal_strength)
{
	struct cx24117_state *state = fe->demodulator_priv;
	struct cx24117_cmd cmd;
	int ret;
	u16 sig_reading;
	u8 buf[2];
	u8 reg = (state->demod == 0) ?
		CX24117_REG_SSTATUS0 : CX24117_REG_SSTATUS1;

	/* Read AGC accumulator register */
	cmd.args[0] = CMD_GET_AGCACC;
	cmd.args[1] = (u8) state->demod;
	cmd.len = 2;
	ret = cx24117_cmd_execute(fe, &cmd);
	if (ret != 0)
		return ret;

	ret = cx24117_readregN(state, reg, buf, 2);
	if (ret != 0)
		return ret;
	sig_reading = ((buf[0] & CX24117_SIGNAL_MASK) << 2) | buf[1];

	*signal_strength = -100 * sig_reading + 94324;

	dev_dbg(&state->priv->i2c->dev,
		"%s() demod%d raw / cooked = 0x%04x / 0x%04x\n",
		__func__, state->demod, sig_reading, *signal_strength);

	return 0;
}

static int cx24117_read_snr(struct dvb_frontend *fe, u16 *snr)
{
	struct cx24117_state *state = fe->demodulator_priv;
	int ret;
	u8 buf[2];
	u8 reg = (state->demod == 0) ?
		CX24117_REG_QUALITY2_0 : CX24117_REG_QUALITY2_1;

	ret = cx24117_readregN(state, reg, buf, 2);
	if (ret != 0)
		return ret;

	*snr = (buf[0] << 8) | buf[1];

	dev_dbg(&state->priv->i2c->dev,
		"%s() demod%d snr = 0x%04x\n",
		__func__, state->demod, *snr);

	return ret;
}

static int cx24117_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
	struct cx24117_state *state = fe->demodulator_priv;
	enum fe_delivery_system delsys = fe->dtv_property_cache.delivery_system;
	int ret;
	u8 buf[2];
	u8 reg = (state->demod == 0) ?
		CX24117_REG_DVBS_UCB2_0 :
		CX24117_REG_DVBS_UCB2_1;

	switch (delsys) {
	case SYS_DVBS:
		break;
	case SYS_DVBS2:
		reg += (CX24117_REG_DVBS2_UCB2_0 - CX24117_REG_DVBS_UCB2_0);
		break;
	default:
		return -EINVAL;
	}

	ret = cx24117_readregN(state, reg, buf, 2);
	if (ret != 0)
		return ret;
	*ucblocks = (buf[0] << 8) | buf[1];

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d ucb=0x%04x\n",
		__func__, state->demod, *ucblocks);

	return 0;
}

/* Overwrite the current tuning params, we are about to tune */
static void cx24117_clone_params(struct dvb_frontend *fe)
{
	struct cx24117_state *state = fe->demodulator_priv;
	state->dcur = state->dnxt;
}

/* Wait for LNB */
static int cx24117_wait_for_lnb(struct dvb_frontend *fe)
{
	struct cx24117_state *state = fe->demodulator_priv;
	int i;
	u8 val, reg = (state->demod == 0) ? CX24117_REG_QSTATUS0 :
					    CX24117_REG_QSTATUS1;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d qstatus = 0x%02x\n",
		__func__, state->demod, cx24117_readreg(state, reg));

	/* Wait for up to 300 ms */
	for (i = 0; i < 10; i++) {
		val = cx24117_readreg(state, reg) & 0x01;
		if (val != 0)
			return 0;
		msleep(30);
	}

	dev_warn(&state->priv->i2c->dev, "%s: demod%d LNB not ready\n",
		KBUILD_MODNAME, state->demod);

	return -ETIMEDOUT; /* -EBUSY ? */
}

static int cx24117_set_voltage(struct dvb_frontend *fe,
			       enum fe_sec_voltage voltage)
{
	struct cx24117_state *state = fe->demodulator_priv;
	struct cx24117_cmd cmd;
	int ret;
	u8 reg = (state->demod == 0) ? 0x10 : 0x20;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d %s\n",
		__func__, state->demod,
		voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
		voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" :
		"SEC_VOLTAGE_OFF");

	/* Prepare a set GPIO logic level CMD */
	cmd.args[0] = CMD_SET_GPIOOUT;
	cmd.args[2] = reg; /* mask */
	cmd.len = 3;

	if ((voltage == SEC_VOLTAGE_13) ||
	    (voltage == SEC_VOLTAGE_18)) {
		/* power on LNB */
		cmd.args[1] = reg;
		ret = cx24117_cmd_execute(fe, &cmd);
		if (ret != 0)
			return ret;

		ret = cx24117_wait_for_lnb(fe);
		if (ret != 0)
			return ret;

		/* Wait for voltage/min repeat delay */
		msleep(100);

		/* Set 13V/18V select pin */
		cmd.args[0] = CMD_LNBDCLEVEL;
		cmd.args[1] = state->demod ? 0 : 1;
		cmd.args[2] = (voltage == SEC_VOLTAGE_18 ? 0x01 : 0x00);
		cmd.len = 3;
		ret = cx24117_cmd_execute(fe, &cmd);

		/* Min delay time before DiSEqC send */
		msleep(20);
	} else {
		/* power off LNB */
		cmd.args[1] = 0x00;
		ret = cx24117_cmd_execute(fe, &cmd);
	}

	return ret;
}

static int cx24117_set_tone(struct dvb_frontend *fe,
			    enum fe_sec_tone_mode tone)
{
	struct cx24117_state *state = fe->demodulator_priv;
	struct cx24117_cmd cmd;
	int ret;

	dev_dbg(&state->priv->i2c->dev, "%s(%d) demod%d\n",
		__func__, state->demod, tone);
	if ((tone != SEC_TONE_ON) && (tone != SEC_TONE_OFF)) {
		dev_warn(&state->priv->i2c->dev, "%s: demod%d invalid tone=%d\n",
			KBUILD_MODNAME, state->demod, tone);
		return -EINVAL;
	}

	/* Wait for LNB ready */
	ret = cx24117_wait_for_lnb(fe);
	if (ret != 0)
		return ret;

	/* Min delay time after DiSEqC send */
	msleep(20);

	/* Set the tone */
	cmd.args[0] = CMD_LNBPCBCONFIG;
	cmd.args[1] = (state->demod ? 0 : 1);
	cmd.args[2] = 0x00;
	cmd.args[3] = 0x00;
	cmd.len = 5;
	switch (tone) {
	case SEC_TONE_ON:
		cmd.args[4] = 0x01;
		break;
	case SEC_TONE_OFF:
		cmd.args[4] = 0x00;
		break;
	}

	msleep(20);

	return cx24117_cmd_execute(fe, &cmd);
}

/* Initialise DiSEqC */
static int cx24117_diseqc_init(struct dvb_frontend *fe)
{
	struct cx24117_state *state = fe->demodulator_priv;

	/* Prepare a DiSEqC command */
	state->dsec_cmd.args[0] = CMD_LNBSEND;

	/* demod */
	state->dsec_cmd.args[CX24117_DISEQC_DEMOD] = state->demod ? 0 : 1;

	/* DiSEqC burst */
	state->dsec_cmd.args[CX24117_DISEQC_BURST] = CX24117_DISEQC_MINI_A;

	/* Unknown */
	state->dsec_cmd.args[CX24117_DISEQC_ARG3_2] = 0x02;
	state->dsec_cmd.args[CX24117_DISEQC_ARG4_0] = 0x00;

	/* Continuation flag? */
	state->dsec_cmd.args[CX24117_DISEQC_ARG5_0] = 0x00;

	/* DiSEqC message length */
	state->dsec_cmd.args[CX24117_DISEQC_MSGLEN] = 0x00;

	/* Command length */
	state->dsec_cmd.len = 7;

	return 0;
}

/* Send DiSEqC message */
static int cx24117_send_diseqc_msg(struct dvb_frontend *fe,
	struct dvb_diseqc_master_cmd *d)
{
	struct cx24117_state *state = fe->demodulator_priv;
	int i, ret;

	/* Dump DiSEqC message */
	dev_dbg(&state->priv->i2c->dev, "%s: demod %d (",
		__func__, state->demod);
	for (i = 0; i < d->msg_len; i++)
		dev_dbg(&state->priv->i2c->dev, "0x%02x ", d->msg[i]);
	dev_dbg(&state->priv->i2c->dev, ")\n");

	/* Validate length */
	if (d->msg_len > sizeof(d->msg))
		return -EINVAL;

	/* DiSEqC message */
	for (i = 0; i < d->msg_len; i++)
		state->dsec_cmd.args[CX24117_DISEQC_MSGOFS + i] = d->msg[i];

	/* DiSEqC message length */
	state->dsec_cmd.args[CX24117_DISEQC_MSGLEN] = d->msg_len;

	/* Command length */
	state->dsec_cmd.len = CX24117_DISEQC_MSGOFS +
		state->dsec_cmd.args[CX24117_DISEQC_MSGLEN];

	/*
	 * Message is sent with derived else cached burst
	 *
	 * WRITE PORT GROUP COMMAND 38
	 *
	 * 0/A/A: E0 10 38 F0..F3
	 * 1/B/B: E0 10 38 F4..F7
	 * 2/C/A: E0 10 38 F8..FB
	 * 3/D/B: E0 10 38 FC..FF
	 *
	 * databyte[3]= 8421:8421
	 *              ABCD:WXYZ
	 *              CLR :SET
	 *
	 *              WX= PORT SELECT 0..3    (X=TONEBURST)
	 *              Y = VOLTAGE             (0=13V, 1=18V)
	 *              Z = BAND                (0=LOW, 1=HIGH(22K))
	 */
	if (d->msg_len >= 4 && d->msg[2] == 0x38)
		state->dsec_cmd.args[CX24117_DISEQC_BURST] =
			((d->msg[3] & 4) >> 2);

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d burst=%d\n",
		__func__, state->demod,
		state->dsec_cmd.args[CX24117_DISEQC_BURST]);

	/* Wait for LNB ready */
	ret = cx24117_wait_for_lnb(fe);
	if (ret != 0)
		return ret;

	/* Wait for voltage/min repeat delay */
	msleep(100);

	/* Command */
	ret = cx24117_cmd_execute(fe, &state->dsec_cmd);
	if (ret != 0)
		return ret;
	/*
	 * Wait for send
	 *
	 * Eutelsat spec:
	 * >15ms delay          + (XXX determine if FW does this, see set_tone)
	 *  13.5ms per byte     +
	 * >15ms delay          +
	 *  12.5ms burst        +
	 * >15ms delay            (XXX determine if FW does this, see set_tone)
	 */
	msleep((state->dsec_cmd.args[CX24117_DISEQC_MSGLEN] << 4) + 60);

	return 0;
}

/* Send DiSEqC burst */
static int cx24117_diseqc_send_burst(struct dvb_frontend *fe,
	enum fe_sec_mini_cmd burst)
{
	struct cx24117_state *state = fe->demodulator_priv;

	dev_dbg(&state->priv->i2c->dev, "%s(%d) demod=%d\n",
		__func__, burst, state->demod);

	/* DiSEqC burst */
	if (burst == SEC_MINI_A)
		state->dsec_cmd.args[CX24117_DISEQC_BURST] =
			CX24117_DISEQC_MINI_A;
	else if (burst == SEC_MINI_B)
		state->dsec_cmd.args[CX24117_DISEQC_BURST] =
			CX24117_DISEQC_MINI_B;
	else
		return -EINVAL;

	return 0;
}

static int cx24117_get_priv(struct cx24117_priv **priv,
	struct i2c_adapter *i2c, u8 client_address)
{
	int ret;

	mutex_lock(&cx24117_list_mutex);
	ret = hybrid_tuner_request_state(struct cx24117_priv, (*priv),
		hybrid_tuner_instance_list, i2c, client_address, "cx24117");
	mutex_unlock(&cx24117_list_mutex);

	return ret;
}

static void cx24117_release_priv(struct cx24117_priv *priv)
{
	mutex_lock(&cx24117_list_mutex);
	if (priv != NULL)
		hybrid_tuner_release_state(priv);
	mutex_unlock(&cx24117_list_mutex);
}

static void cx24117_release(struct dvb_frontend *fe)
{
	struct cx24117_state *state = fe->demodulator_priv;
	dev_dbg(&state->priv->i2c->dev, "%s demod%d\n",
		__func__, state->demod);
	cx24117_release_priv(state->priv);
	kfree(state);
}

static const struct dvb_frontend_ops cx24117_ops;

struct dvb_frontend *cx24117_attach(const struct cx24117_config *config,
	struct i2c_adapter *i2c)
{
	struct cx24117_state *state = NULL;
	struct cx24117_priv *priv = NULL;
	int demod = 0;

	/* get the common data struct for both demods */
	demod = cx24117_get_priv(&priv, i2c, config->demod_address);

	switch (demod) {
	case 0:
		dev_err(&i2c->dev,
			"%s: Error attaching frontend %d\n",
			KBUILD_MODNAME, demod);
		goto error1;
		break;
	case 1:
		/* new priv instance */
		priv->i2c = i2c;
		priv->demod_address = config->demod_address;
		mutex_init(&priv->fe_lock);
		break;
	default:
		/* existing priv instance */
		break;
	}

	/* allocate memory for the internal state */
	state = kzalloc(sizeof(struct cx24117_state), GFP_KERNEL);
	if (state == NULL)
		goto error2;

	state->demod = demod - 1;
	state->priv = priv;

	dev_info(&state->priv->i2c->dev,
		"%s: Attaching frontend %d\n",
		KBUILD_MODNAME, state->demod);

	/* create dvb_frontend */
	memcpy(&state->frontend.ops, &cx24117_ops,
		sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error2:
	cx24117_release_priv(priv);
error1:
	return NULL;
}
EXPORT_SYMBOL_GPL(cx24117_attach);

/*
 * Initialise or wake up device
 *
 * Power config will reset and load initial firmware if required
 */
static int cx24117_initfe(struct dvb_frontend *fe)
{
	struct cx24117_state *state = fe->demodulator_priv;
	struct cx24117_cmd cmd;
	int ret;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
		__func__, state->demod);

	mutex_lock(&state->priv->fe_lock);

	/* Set sleep mode off */
	cmd.args[0] = CMD_SET_SLEEPMODE;
	cmd.args[1] = (state->demod ? 1 : 0);
	cmd.args[2] = 0;
	cmd.len = 3;
	ret = cx24117_cmd_execute_nolock(fe, &cmd);
	if (ret != 0)
		goto exit;

	ret = cx24117_diseqc_init(fe);
	if (ret != 0)
		goto exit;

	/* Set BER control */
	cmd.args[0] = CMD_BERCTRL;
	cmd.args[1] = (state->demod ? 1 : 0);
	cmd.args[2] = 0x10;
	cmd.args[3] = 0x10;
	cmd.len = 4;
	ret = cx24117_cmd_execute_nolock(fe, &cmd);
	if (ret != 0)
		goto exit;

	/* Set RS correction (enable/disable) */
	cmd.args[0] = CMD_ENABLERSCORR;
	cmd.args[1] = (state->demod ? 1 : 0);
	cmd.args[2] = CX24117_OCC;
	cmd.len = 3;
	ret = cx24117_cmd_execute_nolock(fe, &cmd);
	if (ret != 0)
		goto exit;

	/* Set GPIO direction */
	/* Set as output - controls LNB power on/off */
	cmd.args[0] = CMD_SET_GPIODIR;
	cmd.args[1] = 0x30;
	cmd.args[2] = 0x30;
	cmd.len = 3;
	ret = cx24117_cmd_execute_nolock(fe, &cmd);

exit:
	mutex_unlock(&state->priv->fe_lock);

	return ret;
}

/*
 * Put device to sleep
 */
static int cx24117_sleep(struct dvb_frontend *fe)
{
	struct cx24117_state *state = fe->demodulator_priv;
	struct cx24117_cmd cmd;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
		__func__, state->demod);

	/* Set sleep mode on */
	cmd.args[0] = CMD_SET_SLEEPMODE;
	cmd.args[1] = (state->demod ? 1 : 0);
	cmd.args[2] = 1;
	cmd.len = 3;
	return cx24117_cmd_execute(fe, &cmd);
}

/* dvb-core told us to tune, the tv property cache will be complete,
 * it's safe for is to pull values and use them for tuning purposes.
 */
static int cx24117_set_frontend(struct dvb_frontend *fe)
{
	struct cx24117_state *state = fe->demodulator_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct cx24117_cmd cmd;
	enum fe_status tunerstat;
	int i, status, ret, retune = 1;
	u8 reg_clkdiv, reg_ratediv;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
		__func__, state->demod);

	switch (c->delivery_system) {
	case SYS_DVBS:
		dev_dbg(&state->priv->i2c->dev, "%s() demod%d DVB-S\n",
			__func__, state->demod);

		/* Only QPSK is supported for DVB-S */
		if (c->modulation != QPSK) {
			dev_dbg(&state->priv->i2c->dev,
				"%s() demod%d unsupported modulation (%d)\n",
				__func__, state->demod, c->modulation);
			return -EINVAL;
		}

		/* Pilot doesn't exist in DVB-S, turn bit off */
		state->dnxt.pilot_val = CX24117_PILOT_OFF;

		/* DVB-S only supports 0.35 */
		state->dnxt.rolloff_val = CX24117_ROLLOFF_035;
		break;

	case SYS_DVBS2:
		dev_dbg(&state->priv->i2c->dev, "%s() demod%d DVB-S2\n",
			__func__, state->demod);

		/*
		 * NBC 8PSK/QPSK with DVB-S is supported for DVB-S2,
		 * but not hardware auto detection
		 */
		if (c->modulation != PSK_8 && c->modulation != QPSK) {
			dev_dbg(&state->priv->i2c->dev,
				"%s() demod%d unsupported modulation (%d)\n",
				__func__, state->demod, c->modulation);
			return -EOPNOTSUPP;
		}

		switch (c->pilot) {
		case PILOT_AUTO:
			state->dnxt.pilot_val = CX24117_PILOT_AUTO;
			break;
		case PILOT_OFF:
			state->dnxt.pilot_val = CX24117_PILOT_OFF;
			break;
		case PILOT_ON:
			state->dnxt.pilot_val = CX24117_PILOT_ON;
			break;
		default:
			dev_dbg(&state->priv->i2c->dev,
				"%s() demod%d unsupported pilot mode (%d)\n",
				__func__, state->demod, c->pilot);
			return -EOPNOTSUPP;
		}

		switch (c->rolloff) {
		case ROLLOFF_20:
			state->dnxt.rolloff_val = CX24117_ROLLOFF_020;
			break;
		case ROLLOFF_25:
			state->dnxt.rolloff_val = CX24117_ROLLOFF_025;
			break;
		case ROLLOFF_35:
			state->dnxt.rolloff_val = CX24117_ROLLOFF_035;
			break;
		case ROLLOFF_AUTO:
			state->dnxt.rolloff_val = CX24117_ROLLOFF_035;
			/* soft-auto rolloff */
			retune = 3;
			break;
		default:
			dev_warn(&state->priv->i2c->dev,
				"%s: demod%d unsupported rolloff (%d)\n",
				KBUILD_MODNAME, state->demod, c->rolloff);
			return -EOPNOTSUPP;
		}
		break;

	default:
		dev_warn(&state->priv->i2c->dev,
			"%s: demod %d unsupported delivery system (%d)\n",
			KBUILD_MODNAME, state->demod, c->delivery_system);
		return -EINVAL;
	}

	state->dnxt.delsys = c->delivery_system;
	state->dnxt.modulation = c->modulation;
	state->dnxt.frequency = c->frequency;
	state->dnxt.pilot = c->pilot;
	state->dnxt.rolloff = c->rolloff;

	ret = cx24117_set_inversion(state, c->inversion);
	if (ret !=  0)
		return ret;

	ret = cx24117_set_fec(state,
		c->delivery_system, c->modulation, c->fec_inner);
	if (ret !=  0)
		return ret;

	ret = cx24117_set_symbolrate(state, c->symbol_rate);
	if (ret !=  0)
		return ret;

	/* discard the 'current' tuning parameters and prepare to tune */
	cx24117_clone_params(fe);

	dev_dbg(&state->priv->i2c->dev,
		"%s: delsys      = %d\n", __func__, state->dcur.delsys);
	dev_dbg(&state->priv->i2c->dev,
		"%s: modulation  = %d\n", __func__, state->dcur.modulation);
	dev_dbg(&state->priv->i2c->dev,
		"%s: frequency   = %d\n", __func__, state->dcur.frequency);
	dev_dbg(&state->priv->i2c->dev,
		"%s: pilot       = %d (val = 0x%02x)\n", __func__,
		state->dcur.pilot, state->dcur.pilot_val);
	dev_dbg(&state->priv->i2c->dev,
		"%s: retune      = %d\n", __func__, retune);
	dev_dbg(&state->priv->i2c->dev,
		"%s: rolloff     = %d (val = 0x%02x)\n", __func__,
		state->dcur.rolloff, state->dcur.rolloff_val);
	dev_dbg(&state->priv->i2c->dev,
		"%s: symbol_rate = %d\n", __func__, state->dcur.symbol_rate);
	dev_dbg(&state->priv->i2c->dev,
		"%s: FEC         = %d (mask/val = 0x%02x/0x%02x)\n", __func__,
		state->dcur.fec, state->dcur.fec_mask, state->dcur.fec_val);
	dev_dbg(&state->priv->i2c->dev,
		"%s: Inversion   = %d (val = 0x%02x)\n", __func__,
		state->dcur.inversion, state->dcur.inversion_val);

	/* Prepare a tune request */
	cmd.args[0] = CMD_TUNEREQUEST;

	/* demod */
	cmd.args[1] = state->demod;

	/* Frequency */
	cmd.args[2] = (state->dcur.frequency & 0xff0000) >> 16;
	cmd.args[3] = (state->dcur.frequency & 0x00ff00) >> 8;
	cmd.args[4] = (state->dcur.frequency & 0x0000ff);

	/* Symbol Rate */
	cmd.args[5] = ((state->dcur.symbol_rate / 1000) & 0xff00) >> 8;
	cmd.args[6] = ((state->dcur.symbol_rate / 1000) & 0x00ff);

	/* Automatic Inversion */
	cmd.args[7] = state->dcur.inversion_val;

	/* Modulation / FEC / Pilot */
	cmd.args[8] = state->dcur.fec_val | state->dcur.pilot_val;

	cmd.args[9] = CX24117_SEARCH_RANGE_KHZ >> 8;
	cmd.args[10] = CX24117_SEARCH_RANGE_KHZ & 0xff;

	cmd.args[11] = state->dcur.rolloff_val;
	cmd.args[12] = state->dcur.fec_mask;

	if (state->dcur.symbol_rate > 30000000) {
		reg_ratediv = 0x04;
		reg_clkdiv = 0x02;
	} else if (state->dcur.symbol_rate > 10000000) {
		reg_ratediv = 0x06;
		reg_clkdiv = 0x03;
	} else {
		reg_ratediv = 0x0a;
		reg_clkdiv = 0x05;
	}

	cmd.args[13] = reg_ratediv;
	cmd.args[14] = reg_clkdiv;

	cx24117_writereg(state, (state->demod == 0) ?
		CX24117_REG_CLKDIV0 : CX24117_REG_CLKDIV1, reg_clkdiv);
	cx24117_writereg(state, (state->demod == 0) ?
		CX24117_REG_RATEDIV0 : CX24117_REG_RATEDIV1, reg_ratediv);

	cmd.args[15] = CX24117_PNE;
	cmd.len = 16;

	do {
		/* Reset status register */
		status = cx24117_readreg(state, (state->demod == 0) ?
			CX24117_REG_SSTATUS0 : CX24117_REG_SSTATUS1) &
			CX24117_SIGNAL_MASK;

		dev_dbg(&state->priv->i2c->dev,
			"%s() demod%d status_setfe = %02x\n",
			__func__, state->demod, status);

		cx24117_writereg(state, (state->demod == 0) ?
			CX24117_REG_SSTATUS0 : CX24117_REG_SSTATUS1, status);

		/* Tune */
		ret = cx24117_cmd_execute(fe, &cmd);
		if (ret != 0)
			break;

		/*
		 * Wait for up to 500 ms before retrying
		 *
		 * If we are able to tune then generally it occurs within 100ms.
		 * If it takes longer, try a different rolloff setting.
		 */
		for (i = 0; i < 50; i++) {
			cx24117_read_status(fe, &tunerstat);
			status = tunerstat & (FE_HAS_SIGNAL | FE_HAS_SYNC);
			if (status == (FE_HAS_SIGNAL | FE_HAS_SYNC)) {
				dev_dbg(&state->priv->i2c->dev,
					"%s() demod%d tuned\n",
					__func__, state->demod);
				return 0;
			}
			msleep(20);
		}

		dev_dbg(&state->priv->i2c->dev, "%s() demod%d not tuned\n",
			__func__, state->demod);

		/* try next rolloff value */
		if (state->dcur.rolloff == 3)
			cmd.args[11]--;

	} while (--retune);
	return -EINVAL;
}

static int cx24117_tune(struct dvb_frontend *fe, bool re_tune,
	unsigned int mode_flags, unsigned int *delay, enum fe_status *status)
{
	struct cx24117_state *state = fe->demodulator_priv;

	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
		__func__, state->demod);

	*delay = HZ / 5;
	if (re_tune) {
		int ret = cx24117_set_frontend(fe);
		if (ret)
			return ret;
	}
	return cx24117_read_status(fe, status);
}

static int cx24117_get_algo(struct dvb_frontend *fe)
{
	return DVBFE_ALGO_HW;
}

static int cx24117_get_frontend(struct dvb_frontend *fe,
				struct dtv_frontend_properties *c)
{
	struct cx24117_state *state = fe->demodulator_priv;
	struct cx24117_cmd cmd;
	u8 reg, st, inv;
	int ret, idx;
	unsigned int freq;
	short srate_os, freq_os;

	u8 buf[0x1f-4];

	/* Read current tune parameters */
	cmd.args[0] = CMD_GETCTLACC;
	cmd.args[1] = (u8) state->demod;
	cmd.len = 2;
	ret = cx24117_cmd_execute(fe, &cmd);
	if (ret != 0)
		return ret;

	/* read all required regs at once */
	reg = (state->demod == 0) ? CX24117_REG_FREQ3_0 : CX24117_REG_FREQ3_1;
	ret = cx24117_readregN(state, reg, buf, 0x1f-4);
	if (ret != 0)
		return ret;

	st = buf[5];

	/* get spectral inversion */
	inv = (((state->demod == 0) ? ~st : st) >> 6) & 1;
	if (inv == 0)
		c->inversion = INVERSION_OFF;
	else
		c->inversion = INVERSION_ON;

	/* modulation and fec */
	idx = st & 0x3f;
	if (c->delivery_system == SYS_DVBS2) {
		if (idx > 11)
			idx += 9;
		else
			idx += 7;
	}

	c->modulation = cx24117_modfec_modes[idx].modulation;
	c->fec_inner = cx24117_modfec_modes[idx].fec;

	/* frequency */
	freq = (buf[0] << 16) | (buf[1] << 8) | buf[2];
	freq_os = (buf[8] << 8) | buf[9];
	c->frequency = freq + freq_os;

	/* symbol rate */
	srate_os = (buf[10] << 8) | buf[11];
	c->symbol_rate = -1000 * srate_os + state->dcur.symbol_rate;
	return 0;
}

static const struct dvb_frontend_ops cx24117_ops = {
	.delsys = { SYS_DVBS, SYS_DVBS2 },
	.info = {
		.name = "Conexant CX24117/CX24132",
		.frequency_min = 950000,
		.frequency_max = 2150000,
		.frequency_stepsize = 1011, /* kHz for QPSK frontends */
		.frequency_tolerance = 5000,
		.symbol_rate_min = 1000000,
		.symbol_rate_max = 45000000,
		.caps = FE_CAN_INVERSION_AUTO |
			FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
			FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
			FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
			FE_CAN_2G_MODULATION |
			FE_CAN_QPSK | FE_CAN_RECOVER
	},

	.release = cx24117_release,

	.init = cx24117_initfe,
	.sleep = cx24117_sleep,
	.read_status = cx24117_read_status,
	.read_ber = cx24117_read_ber,
	.read_signal_strength = cx24117_read_signal_strength,
	.read_snr = cx24117_read_snr,
	.read_ucblocks = cx24117_read_ucblocks,
	.set_tone = cx24117_set_tone,
	.set_voltage = cx24117_set_voltage,
	.diseqc_send_master_cmd = cx24117_send_diseqc_msg,
	.diseqc_send_burst = cx24117_diseqc_send_burst,
	.get_frontend_algo = cx24117_get_algo,
	.tune = cx24117_tune,

	.set_frontend = cx24117_set_frontend,
	.get_frontend = cx24117_get_frontend,
};


MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24117/cx24132 hardware");
MODULE_AUTHOR("Luis Alves (ljalvs@gmail.com)");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.1");
MODULE_FIRMWARE(CX24117_DEFAULT_FIRMWARE);