summaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb/bt8xx/dst.c
blob: eac83768dfd0ef2d6d2ad90b3e6f1872f802c130 (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
/*
    Frontend-driver for TwinHan DST Frontend

    Copyright (C) 2003 Jamie Honan

    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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <asm/div64.h>

#include "dvb_frontend.h"
#include "dst_priv.h"
#include "dst.h"

struct dst_state {

	struct i2c_adapter* i2c;

	struct bt878* bt;

	struct dvb_frontend_ops ops;

	/* configuration settings */
	const struct dst_config* config;

	struct dvb_frontend frontend;

	/* private demodulator data */
	u8 tx_tuna[10];
	u8 rx_tuna[10];
	u8 rxbuffer[10];
	u8 diseq_flags;
	u8 dst_type;
	u32 type_flags;
	u32 frequency;		/* intermediate frequency in kHz for QPSK */
	fe_spectral_inversion_t inversion;
	u32 symbol_rate;	/* symbol rate in Symbols per second */
	fe_code_rate_t fec;
	fe_sec_voltage_t voltage;
	fe_sec_tone_mode_t tone;
	u32 decode_freq;
	u8 decode_lock;
	u16 decode_strength;
	u16 decode_snr;
	unsigned long cur_jiff;
	u8 k22;
	fe_bandwidth_t bandwidth;
};

static unsigned int dst_verbose = 0;
module_param(dst_verbose, int, 0644);
MODULE_PARM_DESC(dst_verbose, "verbose startup messages, default is 1 (yes)");
static unsigned int dst_debug = 0;
module_param(dst_debug, int, 0644);
MODULE_PARM_DESC(dst_debug, "debug messages, default is 0 (no)");

#define dprintk	if (dst_debug) printk

#define DST_TYPE_IS_SAT		0
#define DST_TYPE_IS_TERR	1
#define DST_TYPE_IS_CABLE	2

#define DST_TYPE_HAS_NEWTUNE	1
#define DST_TYPE_HAS_TS204	2
#define DST_TYPE_HAS_SYMDIV	4

#define HAS_LOCK	1
#define ATTEMPT_TUNE	2
#define HAS_POWER	4

static void dst_packsize(struct dst_state* state, int psize)
{
	union dst_gpio_packet bits;

	bits.psize = psize;
	bt878_device_control(state->bt, DST_IG_TS, &bits);
}

static int dst_gpio_outb(struct dst_state* state, u32 mask, u32 enbb, u32 outhigh)
{
	union dst_gpio_packet enb;
	union dst_gpio_packet bits;
	int err;

	enb.enb.mask = mask;
	enb.enb.enable = enbb;
	if ((err = bt878_device_control(state->bt, DST_IG_ENABLE, &enb)) < 0) {
		dprintk("%s: dst_gpio_enb error (err == %i, mask == 0x%02x, enb == 0x%02x)\n", __FUNCTION__, err, mask, enbb);
		return -EREMOTEIO;
	}

	/* because complete disabling means no output, no need to do output packet */
	if (enbb == 0)
		return 0;

	bits.outp.mask = enbb;
	bits.outp.highvals = outhigh;

	if ((err = bt878_device_control(state->bt, DST_IG_WRITE, &bits)) < 0) {
		dprintk("%s: dst_gpio_outb error (err == %i, enbb == 0x%02x, outhigh == 0x%02x)\n", __FUNCTION__, err, enbb, outhigh);
		return -EREMOTEIO;
	}
	return 0;
}

static int dst_gpio_inb(struct dst_state *state, u8 * result)
{
	union dst_gpio_packet rd_packet;
	int err;

	*result = 0;

	if ((err = bt878_device_control(state->bt, DST_IG_READ, &rd_packet)) < 0) {
		dprintk("%s: dst_gpio_inb error (err == %i)\n", __FUNCTION__, err);
		return -EREMOTEIO;
	}

	*result = (u8) rd_packet.rd.value;
	return 0;
}

#define DST_I2C_ENABLE	1
#define DST_8820	2

static int dst_reset8820(struct dst_state *state)
{
	int retval;
	/* pull 8820 gpio pin low, wait, high, wait, then low */
	// dprintk ("%s: reset 8820\n", __FUNCTION__);
	retval = dst_gpio_outb(state, DST_8820, DST_8820, 0);
	if (retval < 0)
		return retval;
	msleep(10);
	retval = dst_gpio_outb(state, DST_8820, DST_8820, DST_8820);
	if (retval < 0)
		return retval;
	/* wait for more feedback on what works here *
	   msleep(10);
	   retval = dst_gpio_outb(dst, DST_8820, DST_8820, 0);
	   if (retval < 0)
	   return retval;
	 */
	return 0;
}

static int dst_i2c_enable(struct dst_state *state)
{
	int retval;
	/* pull I2C enable gpio pin low, wait */
	// dprintk ("%s: i2c enable\n", __FUNCTION__);
	retval = dst_gpio_outb(state, ~0, DST_I2C_ENABLE, 0);
	if (retval < 0)
		return retval;
	// dprintk ("%s: i2c enable delay\n", __FUNCTION__);
	msleep(33);
	return 0;
}

static int dst_i2c_disable(struct dst_state *state)
{
	int retval;
	/* release I2C enable gpio pin, wait */
	// dprintk ("%s: i2c disable\n", __FUNCTION__);
	retval = dst_gpio_outb(state, ~0, 0, 0);
	if (retval < 0)
		return retval;
	// dprintk ("%s: i2c disable delay\n", __FUNCTION__);
	msleep(33);
	return 0;
}

static int dst_wait_dst_ready(struct dst_state *state)
{
	u8 reply;
	int retval;
	int i;
	for (i = 0; i < 200; i++) {
		retval = dst_gpio_inb(state, &reply);
		if (retval < 0)
			return retval;
		if ((reply & DST_I2C_ENABLE) == 0) {
			dprintk("%s: dst wait ready after %d\n", __FUNCTION__, i);
			return 1;
		}
		msleep(10);
	}
	dprintk("%s: dst wait NOT ready after %d\n", __FUNCTION__, i);
	return 0;
}

static int write_dst(struct dst_state *state, u8 * data, u8 len)
{
	struct i2c_msg msg = {
		.addr = state->config->demod_address,.flags = 0,.buf = data,.len = len
	};
	int err;
	int cnt;

	if (dst_debug && dst_verbose) {
		u8 i;
		dprintk("%s writing", __FUNCTION__);
		for (i = 0; i < len; i++) {
			dprintk(" 0x%02x", data[i]);
		}
		dprintk("\n");
	}
	msleep(30);
	for (cnt = 0; cnt < 4; cnt++) {
		if ((err = i2c_transfer(state->i2c, &msg, 1)) < 0) {
			dprintk("%s: write_dst error (err == %i, len == 0x%02x, b0 == 0x%02x)\n", __FUNCTION__, err, len, data[0]);
			dst_i2c_disable(state);
			msleep(500);
			dst_i2c_enable(state);
			msleep(500);
			continue;
		} else
			break;
	}
	if (cnt >= 4)
		return -EREMOTEIO;
	return 0;
}

static int read_dst(struct dst_state *state, u8 * ret, u8 len)
{
	struct i2c_msg msg = {.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = ret,.len = len };
	int err;
	int cnt;

	for (cnt = 0; cnt < 4; cnt++) {
		if ((err = i2c_transfer(state->i2c, &msg, 1)) < 0) {
			dprintk("%s: read_dst error (err == %i, len == 0x%02x, b0 == 0x%02x)\n", __FUNCTION__, err, len, ret[0]);
			dst_i2c_disable(state);
			dst_i2c_enable(state);
			continue;
		} else
			break;
	}
	if (cnt >= 4)
		return -EREMOTEIO;
	dprintk("%s reply is 0x%x\n", __FUNCTION__, ret[0]);
	if (dst_debug && dst_verbose) {
		for (err = 1; err < len; err++)
			dprintk(" 0x%x", ret[err]);
		if (err > 1)
			dprintk("\n");
	}
	return 0;
}

static int dst_set_freq(struct dst_state *state, u32 freq)
{
	u8 *val;

	state->frequency = freq;

	// dprintk("%s: set frequency %u\n", __FUNCTION__, freq);
	if (state->dst_type == DST_TYPE_IS_SAT) {
		freq = freq / 1000;
		if (freq < 950 || freq > 2150)
			return -EINVAL;
		val = &state->tx_tuna[0];
		val[2] = (freq >> 8) & 0x7f;
		val[3] = (u8) freq;
		val[4] = 1;
		val[8] &= ~4;
		if (freq < 1531)
			val[8] |= 4;
	} else if (state->dst_type == DST_TYPE_IS_TERR) {
		freq = freq / 1000;
		if (freq < 137000 || freq > 858000)
			return -EINVAL;
		val = &state->tx_tuna[0];
		val[2] = (freq >> 16) & 0xff;
		val[3] = (freq >> 8) & 0xff;
		val[4] = (u8) freq;
		val[5] = 0;
		switch (state->bandwidth) {
		case BANDWIDTH_6_MHZ:
			val[6] = 6;
			break;

		case BANDWIDTH_7_MHZ:
		case BANDWIDTH_AUTO:
			val[6] = 7;
			break;

		case BANDWIDTH_8_MHZ:
			val[6] = 8;
			break;
		}

		val[7] = 0;
		val[8] = 0;
	} else if (state->dst_type == DST_TYPE_IS_CABLE) {
		/* guess till will get one */
		freq = freq / 1000;
		val = &state->tx_tuna[0];
		val[2] = (freq >> 16) & 0xff;
		val[3] = (freq >> 8) & 0xff;
		val[4] = (u8) freq;
	} else
		return -EINVAL;
	return 0;
}

static int dst_set_bandwidth(struct dst_state* state, fe_bandwidth_t bandwidth)
{
	u8 *val;

	state->bandwidth = bandwidth;

	if (state->dst_type != DST_TYPE_IS_TERR)
		return 0;

	val = &state->tx_tuna[0];
	switch (bandwidth) {
	case BANDWIDTH_6_MHZ:
		val[6] = 6;
		break;

	case BANDWIDTH_7_MHZ:
		val[6] = 7;
		break;

	case BANDWIDTH_8_MHZ:
		val[6] = 8;
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

static int dst_set_inversion(struct dst_state* state, fe_spectral_inversion_t inversion)
{
	u8 *val;

	state->inversion = inversion;

	val = &state->tx_tuna[0];

	val[8] &= ~0x80;

	switch (inversion) {
	case INVERSION_OFF:
		break;
	case INVERSION_ON:
		val[8] |= 0x80;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int dst_set_fec(struct dst_state* state, fe_code_rate_t fec)
{
	state->fec = fec;
	return 0;
}

static fe_code_rate_t dst_get_fec(struct dst_state* state)
{
	return state->fec;
}

static int dst_set_symbolrate(struct dst_state* state, u32 srate)
{
	u8 *val;
	u32 symcalc;
	u64 sval;

	state->symbol_rate = srate;

	if (state->dst_type == DST_TYPE_IS_TERR) {
		return 0;
	}
	// dprintk("%s: set srate %u\n", __FUNCTION__, srate);
	srate /= 1000;
	val = &state->tx_tuna[0];

	if (state->type_flags & DST_TYPE_HAS_SYMDIV) {
		sval = srate;
		sval <<= 20;
		do_div(sval, 88000);
		symcalc = (u32) sval;
		// dprintk("%s: set symcalc %u\n", __FUNCTION__, symcalc);
		val[5] = (u8) (symcalc >> 12);
		val[6] = (u8) (symcalc >> 4);
		val[7] = (u8) (symcalc << 4);
	} else {
		val[5] = (u8) (srate >> 16) & 0x7f;
		val[6] = (u8) (srate >> 8);
		val[7] = (u8) srate;
	}
	val[8] &= ~0x20;
	if (srate > 8000)
		val[8] |= 0x20;
	return 0;
}

static u8 dst_check_sum(u8 * buf, u32 len)
{
	u32 i;
	u8 val = 0;
	if (!len)
		return 0;
	for (i = 0; i < len; i++) {
		val += buf[i];
	}
	return ((~val) + 1);
}

struct dst_types {
	char *mstr;
	int offs;
	u8 dst_type;
	u32 type_flags;
};

static struct dst_types dst_tlist[] = {
	{"DST-020", 0, DST_TYPE_IS_SAT, DST_TYPE_HAS_SYMDIV},
	{"DST-030", 0, DST_TYPE_IS_SAT, DST_TYPE_HAS_TS204 | DST_TYPE_HAS_NEWTUNE},
	{"DST-03T", 0, DST_TYPE_IS_SAT, DST_TYPE_HAS_SYMDIV | DST_TYPE_HAS_TS204},
	{"DST-MOT", 0, DST_TYPE_IS_SAT, DST_TYPE_HAS_SYMDIV},
	{"DST-CI",  1, DST_TYPE_IS_SAT, DST_TYPE_HAS_TS204 | DST_TYPE_HAS_NEWTUNE},
	{"DSTMCI",  1, DST_TYPE_IS_SAT, DST_TYPE_HAS_NEWTUNE},
	{"DSTFCI",  1, DST_TYPE_IS_SAT, DST_TYPE_HAS_NEWTUNE},
	{"DCTNEW",  1, DST_TYPE_IS_CABLE, DST_TYPE_HAS_NEWTUNE},
	{"DCT-CI",  1, DST_TYPE_IS_CABLE, DST_TYPE_HAS_NEWTUNE | DST_TYPE_HAS_TS204},
	{"DTTDIG",  1, DST_TYPE_IS_TERR, 0}
};

/* DCTNEW and DCT-CI are guesses */

static void dst_type_flags_print(u32 type_flags)
{
	printk("DST type flags :");
	if (type_flags & DST_TYPE_HAS_NEWTUNE)
		printk(" 0x%x newtuner", DST_TYPE_HAS_NEWTUNE);
	if (type_flags & DST_TYPE_HAS_TS204)
		printk(" 0x%x ts204", DST_TYPE_HAS_TS204);
	if (type_flags & DST_TYPE_HAS_SYMDIV)
		printk(" 0x%x symdiv", DST_TYPE_HAS_SYMDIV);
	printk("\n");
}

static int dst_type_print(u8 type)
{
	char *otype;
	switch (type) {
	case DST_TYPE_IS_SAT:
		otype = "satellite";
		break;
	case DST_TYPE_IS_TERR:
		otype = "terrestrial";
		break;
	case DST_TYPE_IS_CABLE:
		otype = "cable";
		break;
	default:
		printk("%s: invalid dst type %d\n", __FUNCTION__, type);
		return -EINVAL;
	}
	printk("DST type : %s\n", otype);
	return 0;
}

static int dst_check_ci(struct dst_state *state)
{
	u8 txbuf[8];
	u8 rxbuf[8];
	int retval;
	int i;
	struct dst_types *dsp;
	u8 use_dst_type;
	u32 use_type_flags;

	memset(txbuf, 0, sizeof(txbuf));
	txbuf[1] = 6;
	txbuf[7] = dst_check_sum(txbuf, 7);

	dst_i2c_enable(state);
	dst_reset8820(state);
	retval = write_dst(state, txbuf, 8);
	if (retval < 0) {
		dst_i2c_disable(state);
		dprintk("%s: write not successful, maybe no card?\n", __FUNCTION__);
		return retval;
	}
	msleep(3);
	retval = read_dst(state, rxbuf, 1);
	dst_i2c_disable(state);
	if (retval < 0) {
		dprintk("%s: read not successful, maybe no card?\n", __FUNCTION__);
		return retval;
	}
	if (rxbuf[0] != 0xff) {
		dprintk("%s: write reply not 0xff, not ci (%02x)\n", __FUNCTION__, rxbuf[0]);
		return retval;
	}
	if (!dst_wait_dst_ready(state))
		return 0;
	// dst_i2c_enable(i2c); Dimitri
	retval = read_dst(state, rxbuf, 8);
	dst_i2c_disable(state);
	if (retval < 0) {
		dprintk("%s: read not successful\n", __FUNCTION__);
		return retval;
	}
	if (rxbuf[7] != dst_check_sum(rxbuf, 7)) {
		dprintk("%s: checksum failure\n", __FUNCTION__);
		return retval;
	}
	rxbuf[7] = '\0';
	for (i = 0, dsp = &dst_tlist[0]; i < sizeof(dst_tlist) / sizeof(dst_tlist[0]); i++, dsp++) {
		if (!strncmp(&rxbuf[dsp->offs], dsp->mstr, strlen(dsp->mstr))) {
			use_type_flags = dsp->type_flags;
			use_dst_type = dsp->dst_type;
			printk("%s: recognize %s\n", __FUNCTION__, dsp->mstr);
			break;
		}
	}
	if (i >= sizeof(dst_tlist) / sizeof(dst_tlist[0])) {
		printk("%s: unable to recognize %s or %s\n", __FUNCTION__, &rxbuf[0], &rxbuf[1]);
		printk("%s please email linux-dvb@linuxtv.org with this type in\n", __FUNCTION__);
		use_dst_type = DST_TYPE_IS_SAT;
		use_type_flags = DST_TYPE_HAS_SYMDIV;
	}
	dst_type_print(use_dst_type);

	state->type_flags = use_type_flags;
	state->dst_type = use_dst_type;
	dst_type_flags_print(state->type_flags);

	if (state->type_flags & DST_TYPE_HAS_TS204) {
		dst_packsize(state, 204);
	}
	return 0;
}

static int dst_command(struct dst_state* state, u8 * data, u8 len)
{
	int retval;
	u8 reply;

	dst_i2c_enable(state);
	dst_reset8820(state);
	retval = write_dst(state, data, len);
	if (retval < 0) {
		dst_i2c_disable(state);
		dprintk("%s: write not successful\n", __FUNCTION__);
		return retval;
	}
	msleep(33);
	retval = read_dst(state, &reply, 1);
	dst_i2c_disable(state);
	if (retval < 0) {
		dprintk("%s: read verify  not successful\n", __FUNCTION__);
		return retval;
	}
	if (reply != 0xff) {
		dprintk("%s: write reply not 0xff 0x%02x \n", __FUNCTION__, reply);
		return 0;
	}
	if (len >= 2 && data[0] == 0 && (data[1] == 1 || data[1] == 3))
		return 0;
	if (!dst_wait_dst_ready(state))
		return 0;
	// dst_i2c_enable(i2c); Per dimitri
	retval = read_dst(state, state->rxbuffer, 8);
	dst_i2c_disable(state);
	if (retval < 0) {
		dprintk("%s: read not successful\n", __FUNCTION__);
		return 0;
	}
	if (state->rxbuffer[7] != dst_check_sum(state->rxbuffer, 7)) {
		dprintk("%s: checksum failure\n", __FUNCTION__);
		return 0;
	}
	return 0;
}

static int dst_get_signal(struct dst_state* state)
{
	int retval;
	u8 get_signal[] = { 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfb };

	if ((state->diseq_flags & ATTEMPT_TUNE) == 0) {
		state->decode_lock = state->decode_strength = state->decode_snr = 0;
		return 0;
	}
	if (0 == (state->diseq_flags & HAS_LOCK)) {
		state->decode_lock = state->decode_strength = state->decode_snr = 0;
		return 0;
	}
	if (time_after_eq(jiffies, state->cur_jiff + (HZ / 5))) {
		retval = dst_command(state, get_signal, 8);
		if (retval < 0)
			return retval;
		if (state->dst_type == DST_TYPE_IS_SAT) {
			state->decode_lock = ((state->rxbuffer[6] & 0x10) == 0) ? 1 : 0;
			state->decode_strength = state->rxbuffer[5] << 8;
			state->decode_snr = state->rxbuffer[2] << 8 | state->rxbuffer[3];
		} else if ((state->dst_type == DST_TYPE_IS_TERR) || (state->dst_type == DST_TYPE_IS_CABLE)) {
			state->decode_lock = (state->rxbuffer[1]) ? 1 : 0;
			state->decode_strength = state->rxbuffer[4] << 8;
			state->decode_snr = state->rxbuffer[3] << 8;
		}
		state->cur_jiff = jiffies;
	}
	return 0;
}

static int dst_tone_power_cmd(struct dst_state* state)
{
	u8 paket[8] = { 0x00, 0x09, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00 };

	if (state->dst_type == DST_TYPE_IS_TERR)
		return 0;

	if (state->voltage == SEC_VOLTAGE_OFF)
		paket[4] = 0;
	else
		paket[4] = 1;
	if (state->tone == SEC_TONE_ON)
		paket[2] = state->k22;
	else
		paket[2] = 0;
	paket[7] = dst_check_sum(&paket[0], 7);
	dst_command(state, paket, 8);
	return 0;
}

static int dst_get_tuna(struct dst_state* state)
{
	int retval;
	if ((state->diseq_flags & ATTEMPT_TUNE) == 0)
		return 0;
	state->diseq_flags &= ~(HAS_LOCK);
	if (!dst_wait_dst_ready(state))
		return 0;
	if (state->type_flags & DST_TYPE_HAS_NEWTUNE) {
		/* how to get variable length reply ???? */
		retval = read_dst(state, state->rx_tuna, 10);
	} else {
		retval = read_dst(state, &state->rx_tuna[2], 8);
	}
	if (retval < 0) {
		dprintk("%s: read not successful\n", __FUNCTION__);
		return 0;
	}
	if (state->type_flags & DST_TYPE_HAS_NEWTUNE) {
		if (state->rx_tuna[9] != dst_check_sum(&state->rx_tuna[0], 9)) {
			dprintk("%s: checksum failure?\n", __FUNCTION__);
			return 0;
		}
	} else {
		if (state->rx_tuna[9] != dst_check_sum(&state->rx_tuna[2], 7)) {
			dprintk("%s: checksum failure?\n", __FUNCTION__);
			return 0;
		}
	}
	if (state->rx_tuna[2] == 0 && state->rx_tuna[3] == 0)
		return 0;
	state->decode_freq = ((state->rx_tuna[2] & 0x7f) << 8) + state->rx_tuna[3];

	state->decode_lock = 1;
	/*
	   dst->decode_n1 = (dst->rx_tuna[4] << 8) +
	   (dst->rx_tuna[5]);

	   dst->decode_n2 = (dst->rx_tuna[8] << 8) +
	   (dst->rx_tuna[7]);
	 */
	state->diseq_flags |= HAS_LOCK;
	/* dst->cur_jiff = jiffies; */
	return 1;
}

static int dst_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage);

static int dst_write_tuna(struct dvb_frontend* fe)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;
	int retval;
	u8 reply;

	dprintk("%s: type_flags 0x%x \n", __FUNCTION__, state->type_flags);
	state->decode_freq = 0;
	state->decode_lock = state->decode_strength = state->decode_snr = 0;
	if (state->dst_type == DST_TYPE_IS_SAT) {
		if (!(state->diseq_flags & HAS_POWER))
			dst_set_voltage(fe, SEC_VOLTAGE_13);
	}
	state->diseq_flags &= ~(HAS_LOCK | ATTEMPT_TUNE);
	dst_i2c_enable(state);
	if (state->type_flags & DST_TYPE_HAS_NEWTUNE) {
		dst_reset8820(state);
		state->tx_tuna[9] = dst_check_sum(&state->tx_tuna[0], 9);
		retval = write_dst(state, &state->tx_tuna[0], 10);
	} else {
		state->tx_tuna[9] = dst_check_sum(&state->tx_tuna[2], 7);
		retval = write_dst(state, &state->tx_tuna[2], 8);
	}
	if (retval < 0) {
		dst_i2c_disable(state);
		dprintk("%s: write not successful\n", __FUNCTION__);
		return retval;
	}
	msleep(3);
	retval = read_dst(state, &reply, 1);
	dst_i2c_disable(state);
	if (retval < 0) {
		dprintk("%s: read verify  not successful\n", __FUNCTION__);
		return retval;
	}
	if (reply != 0xff) {
		dprintk("%s: write reply not 0xff 0x%02x \n", __FUNCTION__, reply);
		return 0;
	}
	state->diseq_flags |= ATTEMPT_TUNE;
	return dst_get_tuna(state);
}

/*
 * line22k0    0x00, 0x09, 0x00, 0xff, 0x01, 0x00, 0x00, 0x00
 * line22k1    0x00, 0x09, 0x01, 0xff, 0x01, 0x00, 0x00, 0x00
 * line22k2    0x00, 0x09, 0x02, 0xff, 0x01, 0x00, 0x00, 0x00
 * tone        0x00, 0x09, 0xff, 0x00, 0x01, 0x00, 0x00, 0x00
 * data        0x00, 0x09, 0xff, 0x01, 0x01, 0x00, 0x00, 0x00
 * power_off   0x00, 0x09, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00
 * power_on    0x00, 0x09, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00
 * Diseqc 1    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf0, 0xec
 * Diseqc 2    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf4, 0xe8
 * Diseqc 3    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf8, 0xe4
 * Diseqc 4    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xfc, 0xe0
 */

static int dst_set_diseqc(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;
	u8 paket[8] = { 0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf0, 0xec };

	if (state->dst_type == DST_TYPE_IS_TERR)
		return 0;

	if (cmd->msg_len == 0 || cmd->msg_len > 4)
		return -EINVAL;
	memcpy(&paket[3], cmd->msg, cmd->msg_len);
	paket[7] = dst_check_sum(&paket[0], 7);
	dst_command(state, paket, 8);
	return 0;
}

static int dst_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
	u8 *val;
	int need_cmd;
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	state->voltage = voltage;

	if (state->dst_type == DST_TYPE_IS_TERR)
		return 0;

	need_cmd = 0;
	val = &state->tx_tuna[0];
	val[8] &= ~0x40;
	switch (voltage) {
	case SEC_VOLTAGE_13:
		if ((state->diseq_flags & HAS_POWER) == 0)
			need_cmd = 1;
		state->diseq_flags |= HAS_POWER;
		break;
	case SEC_VOLTAGE_18:
		if ((state->diseq_flags & HAS_POWER) == 0)
			need_cmd = 1;
		state->diseq_flags |= HAS_POWER;
		val[8] |= 0x40;
		break;
	case SEC_VOLTAGE_OFF:
		need_cmd = 1;
		state->diseq_flags &= ~(HAS_POWER | HAS_LOCK | ATTEMPT_TUNE);
		break;
	default:
		return -EINVAL;
	}
	if (need_cmd) {
		dst_tone_power_cmd(state);
	}
	return 0;
}

static int dst_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
	u8 *val;
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	state->tone = tone;

	if (state->dst_type == DST_TYPE_IS_TERR)
		return 0;

	val = &state->tx_tuna[0];

	val[8] &= ~0x1;

	switch (tone) {
	case SEC_TONE_OFF:
		break;
	case SEC_TONE_ON:
		val[8] |= 1;
		break;
	default:
		return -EINVAL;
	}
	dst_tone_power_cmd(state);
	return 0;
}

static int dst_init(struct dvb_frontend* fe)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;
	static u8 ini_satci_tuna[] = { 9, 0, 3, 0xb6, 1, 0, 0x73, 0x21, 0, 0 };
	static u8 ini_satfta_tuna[] = { 0, 0, 3, 0xb6, 1, 0x55, 0xbd, 0x50, 0, 0 };
	static u8 ini_tvfta_tuna[] = { 0, 0, 3, 0xb6, 1, 7, 0x0, 0x0, 0, 0 };
	static u8 ini_tvci_tuna[] = { 9, 0, 3, 0xb6, 1, 7, 0x0, 0x0, 0, 0 };
	static u8 ini_cabfta_tuna[] = { 0, 0, 3, 0xb6, 1, 7, 0x0, 0x0, 0, 0 };
	static u8 ini_cabci_tuna[] = { 9, 0, 3, 0xb6, 1, 7, 0x0, 0x0, 0, 0 };
	state->inversion = INVERSION_ON;
	state->voltage = SEC_VOLTAGE_13;
	state->tone = SEC_TONE_OFF;
	state->symbol_rate = 29473000;
	state->fec = FEC_AUTO;
	state->diseq_flags = 0;
	state->k22 = 0x02;
	state->bandwidth = BANDWIDTH_7_MHZ;
	state->cur_jiff = jiffies;
	if (state->dst_type == DST_TYPE_IS_SAT) {
		state->frequency = 950000;
		memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_NEWTUNE) ? ini_satci_tuna : ini_satfta_tuna), sizeof(ini_satfta_tuna));
	} else if (state->dst_type == DST_TYPE_IS_TERR) {
		state->frequency = 137000000;
		memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_NEWTUNE) ? ini_tvci_tuna : ini_tvfta_tuna), sizeof(ini_tvfta_tuna));
	} else if (state->dst_type == DST_TYPE_IS_CABLE) {
		state->frequency = 51000000;
		memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_NEWTUNE) ? ini_cabci_tuna : ini_cabfta_tuna), sizeof(ini_cabfta_tuna));
	}

	return 0;
}

static int dst_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	*status = 0;
	if (state->diseq_flags & HAS_LOCK) {
		dst_get_signal(state);
		if (state->decode_lock)
			*status |= FE_HAS_LOCK | FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_SYNC | FE_HAS_VITERBI;
	}

	return 0;
}

static int dst_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	dst_get_signal(state);
	*strength = state->decode_strength;

	return 0;
}

static int dst_read_snr(struct dvb_frontend* fe, u16* snr)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	dst_get_signal(state);
	*snr = state->decode_snr;

	return 0;
}

static int dst_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	dst_set_freq(state, p->frequency);
	dst_set_inversion(state, p->inversion);
	if (state->dst_type == DST_TYPE_IS_SAT) {
		dst_set_fec(state, p->u.qpsk.fec_inner);
		dst_set_symbolrate(state, p->u.qpsk.symbol_rate);
	} else if (state->dst_type == DST_TYPE_IS_TERR) {
		dst_set_bandwidth(state, p->u.ofdm.bandwidth);
	} else if (state->dst_type == DST_TYPE_IS_CABLE) {
		dst_set_fec(state, p->u.qam.fec_inner);
		dst_set_symbolrate(state, p->u.qam.symbol_rate);
	}
	dst_write_tuna(fe);

	return 0;
}

static int dst_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	p->frequency = state->decode_freq;
	p->inversion = state->inversion;
	if (state->dst_type == DST_TYPE_IS_SAT) {
		p->u.qpsk.symbol_rate = state->symbol_rate;
		p->u.qpsk.fec_inner = dst_get_fec(state);
	} else if (state->dst_type == DST_TYPE_IS_TERR) {
		p->u.ofdm.bandwidth = state->bandwidth;
	} else if (state->dst_type == DST_TYPE_IS_CABLE) {
		p->u.qam.symbol_rate = state->symbol_rate;
		p->u.qam.fec_inner = dst_get_fec(state);
		p->u.qam.modulation = QAM_AUTO;
	}

	return 0;
}

static void dst_release(struct dvb_frontend* fe)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops dst_dvbt_ops;
static struct dvb_frontend_ops dst_dvbs_ops;
static struct dvb_frontend_ops dst_dvbc_ops;

struct dvb_frontend* dst_attach(const struct dst_config* config,
				struct i2c_adapter* i2c,
				struct bt878 *bt)
{
	struct dst_state* state = NULL;

	/* allocate memory for the internal state */
	state = (struct dst_state*) kmalloc(sizeof(struct dst_state), GFP_KERNEL);
	if (state == NULL) goto error;

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	state->bt = bt;

	/* check if the demod is there */
	if (dst_check_ci(state) < 0) goto error;

	/* determine settings based on type */
	switch (state->dst_type) {
	case DST_TYPE_IS_TERR:
		memcpy(&state->ops, &dst_dvbt_ops, sizeof(struct dvb_frontend_ops));
		break;
	case DST_TYPE_IS_CABLE:
		memcpy(&state->ops, &dst_dvbc_ops, sizeof(struct dvb_frontend_ops));
		break;
	case DST_TYPE_IS_SAT:
		memcpy(&state->ops, &dst_dvbs_ops, sizeof(struct dvb_frontend_ops));
		break;
	default:
		printk("dst: unknown frontend type. please report to the LinuxTV.org DVB mailinglist.\n");
		goto error;
	}

	/* create dvb_frontend */
	state->frontend.ops = &state->ops;
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error:
	kfree(state);
	return NULL;
}

static struct dvb_frontend_ops dst_dvbt_ops = {

	.info = {
		.name = "DST DVB-T",
		.type = FE_OFDM,
		.frequency_min = 137000000,
		.frequency_max = 858000000,
		.frequency_stepsize = 166667,
		.caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO
	},

	.release = dst_release,

	.init = dst_init,

	.set_frontend = dst_set_frontend,
	.get_frontend = dst_get_frontend,

	.read_status = dst_read_status,
	.read_signal_strength = dst_read_signal_strength,
	.read_snr = dst_read_snr,
};

static struct dvb_frontend_ops dst_dvbs_ops = {

	.info = {
		.name = "DST DVB-S",
		.type = FE_QPSK,
		.frequency_min = 950000,
		.frequency_max = 2150000,
		.frequency_stepsize = 1000,	/* kHz for QPSK frontends */
		.frequency_tolerance = 29500,
		.symbol_rate_min = 1000000,
		.symbol_rate_max = 45000000,
	/*     . symbol_rate_tolerance	=	???,*/
		.caps = FE_CAN_FEC_AUTO | FE_CAN_QPSK
	},

	.release = dst_release,

	.init = dst_init,

	.set_frontend = dst_set_frontend,
	.get_frontend = dst_get_frontend,

	.read_status = dst_read_status,
	.read_signal_strength = dst_read_signal_strength,
	.read_snr = dst_read_snr,

	.diseqc_send_master_cmd = dst_set_diseqc,
	.set_voltage = dst_set_voltage,
	.set_tone = dst_set_tone,
};

static struct dvb_frontend_ops dst_dvbc_ops = {

	.info = {
		.name = "DST DVB-C",
		.type = FE_QAM,
		.frequency_stepsize = 62500,
		.frequency_min = 51000000,
		.frequency_max = 858000000,
		.symbol_rate_min = 1000000,
		.symbol_rate_max = 45000000,
	/*     . symbol_rate_tolerance	=	???,*/
		.caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO
	},

	.release = dst_release,

	.init = dst_init,

	.set_frontend = dst_set_frontend,
	.get_frontend = dst_get_frontend,

	.read_status = dst_read_status,
	.read_signal_strength = dst_read_signal_strength,
	.read_snr = dst_read_snr,
};

MODULE_DESCRIPTION("DST DVB-S/T/C Combo Frontend driver");
MODULE_AUTHOR("Jamie Honan");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(dst_attach);
OpenPOWER on IntegriCloud