Free Electrons

Embedded Linux Experts

   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
/*
 * i2c tv tuner chip device driver
 * controls all those simple 4-control-bytes style tuners.
 *
 * This "tuner-simple" module was split apart from the original "tuner" module.
 */
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/tuner.h>
#include <media/v4l2-common.h>
#include <media/tuner-types.h>
#include "tuner-i2c.h"
#include "tuner-simple.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");

#define TUNER_SIMPLE_MAX 64
static unsigned int simple_devcount;

static int offset;
module_param(offset, int, 0664);
MODULE_PARM_DESC(offset, "Allows to specify an offset for tuner");

static unsigned int atv_input[TUNER_SIMPLE_MAX] = \
			{ [0 ... (TUNER_SIMPLE_MAX-1)] = 0 };
static unsigned int dtv_input[TUNER_SIMPLE_MAX] = \
			{ [0 ... (TUNER_SIMPLE_MAX-1)] = 0 };
module_param_array(atv_input, int, NULL, 0644);
module_param_array(dtv_input, int, NULL, 0644);
MODULE_PARM_DESC(atv_input, "specify atv rf input, 0 for autoselect");
MODULE_PARM_DESC(dtv_input, "specify dtv rf input, 0 for autoselect");

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

/* tv standard selection for Temic 4046 FM5
   this value takes the low bits of control byte 2
   from datasheet Rev.01, Feb.00
     standard     BG      I       L       L2      D
     picture IF   38.9    38.9    38.9    33.95   38.9
     sound 1      33.4    32.9    32.4    40.45   32.4
     sound 2      33.16
     NICAM        33.05   32.348  33.05           33.05
 */
#define TEMIC_SET_PAL_I         0x05
#define TEMIC_SET_PAL_DK        0x09
#define TEMIC_SET_PAL_L         0x0a /* SECAM ? */
#define TEMIC_SET_PAL_L2        0x0b /* change IF ! */
#define TEMIC_SET_PAL_BG        0x0c

/* tv tuner system standard selection for Philips FQ1216ME
   this value takes the low bits of control byte 2
   from datasheet "1999 Nov 16" (supersedes "1999 Mar 23")
     standard 		BG	DK	I	L	L`
     picture carrier	38.90	38.90	38.90	38.90	33.95
     colour		34.47	34.47	34.47	34.47	38.38
     sound 1		33.40	32.40	32.90	32.40	40.45
     sound 2		33.16	-	-	-	-
     NICAM		33.05	33.05	32.35	33.05	39.80
 */
#define PHILIPS_SET_PAL_I	0x01 /* Bit 2 always zero !*/
#define PHILIPS_SET_PAL_BGDK	0x09
#define PHILIPS_SET_PAL_L2	0x0a
#define PHILIPS_SET_PAL_L	0x0b

/* system switching for Philips FI1216MF MK2
   from datasheet "1996 Jul 09",
    standard         BG     L      L'
    picture carrier  38.90  38.90  33.95
    colour	     34.47  34.37  38.38
    sound 1          33.40  32.40  40.45
    sound 2          33.16  -      -
    NICAM            33.05  33.05  39.80
 */
#define PHILIPS_MF_SET_STD_BG	0x01 /* Bit 2 must be zero, Bit 3 is system output */
#define PHILIPS_MF_SET_STD_L	0x03 /* Used on Secam France */
#define PHILIPS_MF_SET_STD_LC	0x02 /* Used on SECAM L' */

/* Control byte */

#define TUNER_RATIO_MASK        0x06 /* Bit cb1:cb2 */
#define TUNER_RATIO_SELECT_50   0x00
#define TUNER_RATIO_SELECT_32   0x02
#define TUNER_RATIO_SELECT_166  0x04
#define TUNER_RATIO_SELECT_62   0x06

#define TUNER_CHARGE_PUMP       0x40  /* Bit cb6 */

/* Status byte */

#define TUNER_POR	  0x80
#define TUNER_FL          0x40
#define TUNER_MODE        0x38
#define TUNER_AFC         0x07
#define TUNER_SIGNAL      0x07
#define TUNER_STEREO      0x10

#define TUNER_PLL_LOCKED   0x40
#define TUNER_STEREO_MK3   0x04

static DEFINE_MUTEX(tuner_simple_list_mutex);
static LIST_HEAD(hybrid_tuner_instance_list);

struct tuner_simple_priv {
	unsigned int nr;
	u16 last_div;

	struct tuner_i2c_props i2c_props;
	struct list_head hybrid_tuner_instance_list;

	unsigned int type;
	struct tunertype *tun;

	u32 frequency;
	u32 bandwidth;
	bool radio_mode;
};

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

static int tuner_read_status(struct dvb_frontend *fe)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	unsigned char byte;

	if (1 != tuner_i2c_xfer_recv(&priv->i2c_props, &byte, 1))
		return 0;

	return byte;
}

static inline int tuner_signal(const int status)
{
	return (status & TUNER_SIGNAL) << 13;
}

static inline int tuner_stereo(const int type, const int status)
{
	switch (type) {
	case TUNER_PHILIPS_FM1216ME_MK3:
	case TUNER_PHILIPS_FM1236_MK3:
	case TUNER_PHILIPS_FM1256_IH3:
	case TUNER_LG_NTSC_TAPE:
	case TUNER_TCL_MF02GIP_5N:
		return ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
	case TUNER_PHILIPS_FM1216MK5:
		return status | TUNER_STEREO;
	default:
		return status & TUNER_STEREO;
	}
}

static inline int tuner_islocked(const int status)
{
	return (status & TUNER_FL);
}

static inline int tuner_afcstatus(const int status)
{
	return (status & TUNER_AFC) - 2;
}


static int simple_get_status(struct dvb_frontend *fe, u32 *status)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	int tuner_status;

	if (priv->i2c_props.adap == NULL)
		return -EINVAL;

	tuner_status = tuner_read_status(fe);

	*status = 0;

	if (tuner_islocked(tuner_status))
		*status = TUNER_STATUS_LOCKED;
	if (tuner_stereo(priv->type, tuner_status))
		*status |= TUNER_STATUS_STEREO;

	tuner_dbg("AFC Status: %d\n", tuner_afcstatus(tuner_status));

	return 0;
}

static int simple_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	int signal;

	if (priv->i2c_props.adap == NULL || !priv->radio_mode)
		return -EINVAL;

	signal = tuner_signal(tuner_read_status(fe));

	*strength = signal;

	tuner_dbg("Signal strength: %d\n", signal);

	return 0;
}

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

static inline char *tuner_param_name(enum param_type type)
{
	char *name;

	switch (type) {
	case TUNER_PARAM_TYPE_RADIO:
		name = "radio";
		break;
	case TUNER_PARAM_TYPE_PAL:
		name = "pal";
		break;
	case TUNER_PARAM_TYPE_SECAM:
		name = "secam";
		break;
	case TUNER_PARAM_TYPE_NTSC:
		name = "ntsc";
		break;
	case TUNER_PARAM_TYPE_DIGITAL:
		name = "digital";
		break;
	default:
		name = "unknown";
		break;
	}
	return name;
}

static struct tuner_params *simple_tuner_params(struct dvb_frontend *fe,
						enum param_type desired_type)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	struct tunertype *tun = priv->tun;
	int i;

	for (i = 0; i < tun->count; i++)
		if (desired_type == tun->params[i].type)
			break;

	/* use default tuner params if desired_type not available */
	if (i == tun->count) {
		tuner_dbg("desired params (%s) undefined for tuner %d\n",
			  tuner_param_name(desired_type), priv->type);
		i = 0;
	}

	tuner_dbg("using tuner params #%d (%s)\n", i,
		  tuner_param_name(tun->params[i].type));

	return &tun->params[i];
}

static int simple_config_lookup(struct dvb_frontend *fe,
				struct tuner_params *t_params,
				unsigned *frequency, u8 *config, u8 *cb)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	int i;

	for (i = 0; i < t_params->count; i++) {
		if (*frequency > t_params->ranges[i].limit)
			continue;
		break;
	}
	if (i == t_params->count) {
		tuner_dbg("frequency out of range (%d > %d)\n",
			  *frequency, t_params->ranges[i - 1].limit);
		*frequency = t_params->ranges[--i].limit;
	}
	*config = t_params->ranges[i].config;
	*cb     = t_params->ranges[i].cb;

	tuner_dbg("freq = %d.%02d (%d), range = %d, config = 0x%02x, cb = 0x%02x\n",
		  *frequency / 16, *frequency % 16 * 100 / 16, *frequency,
		  i, *config, *cb);

	return i;
}

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

static void simple_set_rf_input(struct dvb_frontend *fe,
				u8 *config, u8 *cb, unsigned int rf)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;

	switch (priv->type) {
	case TUNER_PHILIPS_TUV1236D:
		switch (rf) {
		case 1:
			*cb |= 0x08;
			break;
		default:
			*cb &= ~0x08;
			break;
		}
		break;
	case TUNER_PHILIPS_FCV1236D:
		switch (rf) {
		case 1:
			*cb |= 0x01;
			break;
		default:
			*cb &= ~0x01;
			break;
		}
		break;
	default:
		break;
	}
}

static int simple_std_setup(struct dvb_frontend *fe,
			    struct analog_parameters *params,
			    u8 *config, u8 *cb)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	int rc;

	/* tv norm specific stuff for multi-norm tuners */
	switch (priv->type) {
	case TUNER_PHILIPS_SECAM: /* FI1216MF */
		/* 0x01 -> ??? no change ??? */
		/* 0x02 -> PAL BDGHI / SECAM L */
		/* 0x04 -> ??? PAL others / SECAM others ??? */
		*cb &= ~0x03;
		if (params->std & V4L2_STD_SECAM_L)
			/* also valid for V4L2_STD_SECAM */
			*cb |= PHILIPS_MF_SET_STD_L;
		else if (params->std & V4L2_STD_SECAM_LC)
			*cb |= PHILIPS_MF_SET_STD_LC;
		else /* V4L2_STD_B|V4L2_STD_GH */
			*cb |= PHILIPS_MF_SET_STD_BG;
		break;

	case TUNER_TEMIC_4046FM5:
		*cb &= ~0x0f;

		if (params->std & V4L2_STD_PAL_BG) {
			*cb |= TEMIC_SET_PAL_BG;

		} else if (params->std & V4L2_STD_PAL_I) {
			*cb |= TEMIC_SET_PAL_I;

		} else if (params->std & V4L2_STD_PAL_DK) {
			*cb |= TEMIC_SET_PAL_DK;

		} else if (params->std & V4L2_STD_SECAM_L) {
			*cb |= TEMIC_SET_PAL_L;

		}
		break;

	case TUNER_PHILIPS_FQ1216ME:
		*cb &= ~0x0f;

		if (params->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
			*cb |= PHILIPS_SET_PAL_BGDK;

		} else if (params->std & V4L2_STD_PAL_I) {
			*cb |= PHILIPS_SET_PAL_I;

		} else if (params->std & V4L2_STD_SECAM_L) {
			*cb |= PHILIPS_SET_PAL_L;

		}
		break;

	case TUNER_PHILIPS_FCV1236D:
		/* 0x00 -> ATSC antenna input 1 */
		/* 0x01 -> ATSC antenna input 2 */
		/* 0x02 -> NTSC antenna input 1 */
		/* 0x03 -> NTSC antenna input 2 */
		*cb &= ~0x03;
		if (!(params->std & V4L2_STD_ATSC))
			*cb |= 2;
		break;

	case TUNER_MICROTUNE_4042FI5:
		/* Set the charge pump for fast tuning */
		*config |= TUNER_CHARGE_PUMP;
		break;

	case TUNER_PHILIPS_TUV1236D:
	{
		struct tuner_i2c_props i2c = priv->i2c_props;
		/* 0x40 -> ATSC antenna input 1 */
		/* 0x48 -> ATSC antenna input 2 */
		/* 0x00 -> NTSC antenna input 1 */
		/* 0x08 -> NTSC antenna input 2 */
		u8 buffer[4] = { 0x14, 0x00, 0x17, 0x00};
		*cb &= ~0x40;
		if (params->std & V4L2_STD_ATSC) {
			*cb |= 0x40;
			buffer[1] = 0x04;
		}
		/* set to the correct mode (analog or digital) */
		i2c.addr = 0x0a;
		rc = tuner_i2c_xfer_send(&i2c, &buffer[0], 2);
		if (2 != rc)
			tuner_warn("i2c i/o error: rc == %d (should be 2)\n",
				   rc);
		rc = tuner_i2c_xfer_send(&i2c, &buffer[2], 2);
		if (2 != rc)
			tuner_warn("i2c i/o error: rc == %d (should be 2)\n",
				   rc);
		break;
	}
	}
	if (atv_input[priv->nr])
		simple_set_rf_input(fe, config, cb, atv_input[priv->nr]);

	return 0;
}

static int simple_set_aux_byte(struct dvb_frontend *fe, u8 config, u8 aux)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	int rc;
	u8 buffer[2];

	buffer[0] = (config & ~0x38) | 0x18;
	buffer[1] = aux;

	tuner_dbg("setting aux byte: 0x%02x 0x%02x\n", buffer[0], buffer[1]);

	rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 2);
	if (2 != rc)
		tuner_warn("i2c i/o error: rc == %d (should be 2)\n", rc);

	return rc == 2 ? 0 : rc;
}

static int simple_post_tune(struct dvb_frontend *fe, u8 *buffer,
			    u16 div, u8 config, u8 cb)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	int rc;

	switch (priv->type) {
	case TUNER_LG_TDVS_H06XF:
		simple_set_aux_byte(fe, config, 0x20);
		break;
	case TUNER_PHILIPS_FQ1216LME_MK3:
		simple_set_aux_byte(fe, config, 0x60); /* External AGC */
		break;
	case TUNER_MICROTUNE_4042FI5:
	{
		/* FIXME - this may also work for other tuners */
		unsigned long timeout = jiffies + msecs_to_jiffies(1);
		u8 status_byte = 0;

		/* Wait until the PLL locks */
		for (;;) {
			if (time_after(jiffies, timeout))
				return 0;
			rc = tuner_i2c_xfer_recv(&priv->i2c_props,
						 &status_byte, 1);
			if (1 != rc) {
				tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",
					   rc);
				break;
			}
			if (status_byte & TUNER_PLL_LOCKED)
				break;
			udelay(10);
		}

		/* Set the charge pump for optimized phase noise figure */
		config &= ~TUNER_CHARGE_PUMP;
		buffer[0] = (div>>8) & 0x7f;
		buffer[1] = div      & 0xff;
		buffer[2] = config;
		buffer[3] = cb;
		tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
			  buffer[0], buffer[1], buffer[2], buffer[3]);

		rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 4);
		if (4 != rc)
			tuner_warn("i2c i/o error: rc == %d (should be 4)\n",
				   rc);
		break;
	}
	}

	return 0;
}

static int simple_radio_bandswitch(struct dvb_frontend *fe, u8 *buffer)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;

	switch (priv->type) {
	case TUNER_TENA_9533_DI:
	case TUNER_YMEC_TVF_5533MF:
		tuner_dbg("This tuner doesn't have FM. Most cards have a TEA5767 for FM\n");
		return 0;
	case TUNER_PHILIPS_FM1216ME_MK3:
	case TUNER_PHILIPS_FM1236_MK3:
	case TUNER_PHILIPS_FMD1216ME_MK3:
	case TUNER_PHILIPS_FMD1216MEX_MK3:
	case TUNER_LG_NTSC_TAPE:
	case TUNER_PHILIPS_FM1256_IH3:
	case TUNER_TCL_MF02GIP_5N:
		buffer[3] = 0x19;
		break;
	case TUNER_PHILIPS_FM1216MK5:
		buffer[2] = 0x88;
		buffer[3] = 0x09;
		break;
	case TUNER_TNF_5335MF:
		buffer[3] = 0x11;
		break;
	case TUNER_LG_PAL_FM:
		buffer[3] = 0xa5;
		break;
	case TUNER_THOMSON_DTT761X:
		buffer[3] = 0x39;
		break;
	case TUNER_PHILIPS_FQ1216LME_MK3:
	case TUNER_PHILIPS_FQ1236_MK5:
		tuner_err("This tuner doesn't have FM\n");
		/* Set the low band for sanity, since it covers 88-108 MHz */
		buffer[3] = 0x01;
		break;
	case TUNER_MICROTUNE_4049FM5:
	default:
		buffer[3] = 0xa4;
		break;
	}

	return 0;
}

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

static int simple_set_tv_freq(struct dvb_frontend *fe,
			      struct analog_parameters *params)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	u8 config, cb;
	u16 div;
	u8 buffer[4];
	int rc, IFPCoff, i;
	enum param_type desired_type;
	struct tuner_params *t_params;

	/* IFPCoff = Video Intermediate Frequency - Vif:
		940  =16*58.75  NTSC/J (Japan)
		732  =16*45.75  M/N STD
		704  =16*44     ATSC (at DVB code)
		632  =16*39.50  I U.K.
		622.4=16*38.90  B/G D/K I, L STD
		592  =16*37.00  D China
		590  =16.36.875 B Australia
		543.2=16*33.95  L' STD
		171.2=16*10.70  FM Radio (at set_radio_freq)
	*/

	if (params->std == V4L2_STD_NTSC_M_JP) {
		IFPCoff      = 940;
		desired_type = TUNER_PARAM_TYPE_NTSC;
	} else if ((params->std & V4L2_STD_MN) &&
		  !(params->std & ~V4L2_STD_MN)) {
		IFPCoff      = 732;
		desired_type = TUNER_PARAM_TYPE_NTSC;
	} else if (params->std == V4L2_STD_SECAM_LC) {
		IFPCoff      = 543;
		desired_type = TUNER_PARAM_TYPE_SECAM;
	} else {
		IFPCoff      = 623;
		desired_type = TUNER_PARAM_TYPE_PAL;
	}

	t_params = simple_tuner_params(fe, desired_type);

	i = simple_config_lookup(fe, t_params, &params->frequency,
				 &config, &cb);

	div = params->frequency + IFPCoff + offset;

	tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
		  params->frequency / 16, params->frequency % 16 * 100 / 16,
		  IFPCoff / 16, IFPCoff % 16 * 100 / 16,
		  offset / 16, offset % 16 * 100 / 16, div);

	/* tv norm specific stuff for multi-norm tuners */
	simple_std_setup(fe, params, &config, &cb);

	if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
		buffer[0] = config;
		buffer[1] = cb;
		buffer[2] = (div>>8) & 0x7f;
		buffer[3] = div      & 0xff;
	} else {
		buffer[0] = (div>>8) & 0x7f;
		buffer[1] = div      & 0xff;
		buffer[2] = config;
		buffer[3] = cb;
	}
	priv->last_div = div;
	if (t_params->has_tda9887) {
		struct v4l2_priv_tun_config tda9887_cfg;
		int tda_config = 0;
		int is_secam_l = (params->std & (V4L2_STD_SECAM_L |
						 V4L2_STD_SECAM_LC)) &&
			!(params->std & ~(V4L2_STD_SECAM_L |
					  V4L2_STD_SECAM_LC));

		tda9887_cfg.tuner = TUNER_TDA9887;
		tda9887_cfg.priv  = &tda_config;

		if (params->std == V4L2_STD_SECAM_LC) {
			if (t_params->port1_active ^ t_params->port1_invert_for_secam_lc)
				tda_config |= TDA9887_PORT1_ACTIVE;
			if (t_params->port2_active ^ t_params->port2_invert_for_secam_lc)
				tda_config |= TDA9887_PORT2_ACTIVE;
		} else {
			if (t_params->port1_active)
				tda_config |= TDA9887_PORT1_ACTIVE;
			if (t_params->port2_active)
				tda_config |= TDA9887_PORT2_ACTIVE;
		}
		if (t_params->intercarrier_mode)
			tda_config |= TDA9887_INTERCARRIER;
		if (is_secam_l) {
			if (i == 0 && t_params->default_top_secam_low)
				tda_config |= TDA9887_TOP(t_params->default_top_secam_low);
			else if (i == 1 && t_params->default_top_secam_mid)
				tda_config |= TDA9887_TOP(t_params->default_top_secam_mid);
			else if (t_params->default_top_secam_high)
				tda_config |= TDA9887_TOP(t_params->default_top_secam_high);
		} else {
			if (i == 0 && t_params->default_top_low)
				tda_config |= TDA9887_TOP(t_params->default_top_low);
			else if (i == 1 && t_params->default_top_mid)
				tda_config |= TDA9887_TOP(t_params->default_top_mid);
			else if (t_params->default_top_high)
				tda_config |= TDA9887_TOP(t_params->default_top_high);
		}
		if (t_params->default_pll_gating_18)
			tda_config |= TDA9887_GATING_18;
		i2c_clients_command(priv->i2c_props.adap, TUNER_SET_CONFIG,
				    &tda9887_cfg);
	}
	tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
		  buffer[0], buffer[1], buffer[2], buffer[3]);

	rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 4);
	if (4 != rc)
		tuner_warn("i2c i/o error: rc == %d (should be 4)\n", rc);

	simple_post_tune(fe, &buffer[0], div, config, cb);

	return 0;
}

static int simple_set_radio_freq(struct dvb_frontend *fe,
				 struct analog_parameters *params)
{
	struct tunertype *tun;
	struct tuner_simple_priv *priv = fe->tuner_priv;
	u8 buffer[4];
	u16 div;
	int rc, j;
	struct tuner_params *t_params;
	unsigned int freq = params->frequency;

	tun = priv->tun;

	for (j = tun->count-1; j > 0; j--)
		if (tun->params[j].type == TUNER_PARAM_TYPE_RADIO)
			break;
	/* default t_params (j=0) will be used if desired type wasn't found */
	t_params = &tun->params[j];

	/* Select Radio 1st IF used */
	switch (t_params->radio_if) {
	case 0: /* 10.7 MHz */
		freq += (unsigned int)(10.7*16000);
		break;
	case 1: /* 33.3 MHz */
		freq += (unsigned int)(33.3*16000);
		break;
	case 2: /* 41.3 MHz */
		freq += (unsigned int)(41.3*16000);
		break;
	default:
		tuner_warn("Unsupported radio_if value %d\n",
			   t_params->radio_if);
		return 0;
	}

	buffer[2] = (t_params->ranges[0].config & ~TUNER_RATIO_MASK) |
		    TUNER_RATIO_SELECT_50; /* 50 kHz step */

	/* Bandswitch byte */
	simple_radio_bandswitch(fe, &buffer[0]);

	/* Convert from 1/16 kHz V4L steps to 1/20 MHz (=50 kHz) PLL steps
	   freq * (1 Mhz / 16000 V4L steps) * (20 PLL steps / 1 MHz) =
	   freq * (1/800) */
	div = (freq + 400) / 800;

	if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
		buffer[0] = buffer[2];
		buffer[1] = buffer[3];
		buffer[2] = (div>>8) & 0x7f;
		buffer[3] = div      & 0xff;
	} else {
		buffer[0] = (div>>8) & 0x7f;
		buffer[1] = div      & 0xff;
	}

	tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
	       buffer[0], buffer[1], buffer[2], buffer[3]);
	priv->last_div = div;

	if (t_params->has_tda9887) {
		int config = 0;
		struct v4l2_priv_tun_config tda9887_cfg;

		tda9887_cfg.tuner = TUNER_TDA9887;
		tda9887_cfg.priv = &config;

		if (t_params->port1_active &&
		    !t_params->port1_fm_high_sensitivity)
			config |= TDA9887_PORT1_ACTIVE;
		if (t_params->port2_active &&
		    !t_params->port2_fm_high_sensitivity)
			config |= TDA9887_PORT2_ACTIVE;
		if (t_params->intercarrier_mode)
			config |= TDA9887_INTERCARRIER;
/*		if (t_params->port1_set_for_fm_mono)
			config &= ~TDA9887_PORT1_ACTIVE;*/
		if (t_params->fm_gain_normal)
			config |= TDA9887_GAIN_NORMAL;
		if (t_params->radio_if == 2)
			config |= TDA9887_RIF_41_3;
		i2c_clients_command(priv->i2c_props.adap, TUNER_SET_CONFIG,
				    &tda9887_cfg);
	}
	rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 4);
	if (4 != rc)
		tuner_warn("i2c i/o error: rc == %d (should be 4)\n", rc);

	/* Write AUX byte */
	switch (priv->type) {
	case TUNER_PHILIPS_FM1216ME_MK3:
		buffer[2] = 0x98;
		buffer[3] = 0x20; /* set TOP AGC */
		rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 4);
		if (4 != rc)
			tuner_warn("i2c i/o error: rc == %d (should be 4)\n", rc);
		break;
	}

	return 0;
}

static int simple_set_params(struct dvb_frontend *fe,
			     struct analog_parameters *params)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	int ret = -EINVAL;

	if (priv->i2c_props.adap == NULL)
		return -EINVAL;

	switch (params->mode) {
	case V4L2_TUNER_RADIO:
		priv->radio_mode = true;
		ret = simple_set_radio_freq(fe, params);
		priv->frequency = params->frequency * 125 / 2;
		break;
	case V4L2_TUNER_ANALOG_TV:
	case V4L2_TUNER_DIGITAL_TV:
		priv->radio_mode = false;
		ret = simple_set_tv_freq(fe, params);
		priv->frequency = params->frequency * 62500;
		break;
	}
	priv->bandwidth = 0;

	return ret;
}

static void simple_set_dvb(struct dvb_frontend *fe, u8 *buf,
			   const u32 delsys,
			   const u32 frequency,
			   const u32 bandwidth)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;

	switch (priv->type) {
	case TUNER_PHILIPS_FMD1216ME_MK3:
	case TUNER_PHILIPS_FMD1216MEX_MK3:
		if (bandwidth == 8000000 &&
		    frequency >= 158870000)
			buf[3] |= 0x08;
		break;
	case TUNER_PHILIPS_TD1316:
		/* determine band */
		buf[3] |= (frequency < 161000000) ? 1 :
			  (frequency < 444000000) ? 2 : 4;

		/* setup PLL filter */
		if (bandwidth == 8000000)
			buf[3] |= 1 << 3;
		break;
	case TUNER_PHILIPS_TUV1236D:
	case TUNER_PHILIPS_FCV1236D:
	{
		unsigned int new_rf;

		if (dtv_input[priv->nr])
			new_rf = dtv_input[priv->nr];
		else
			switch (delsys) {
			case SYS_DVBC_ANNEX_B:
				new_rf = 1;
				break;
			case SYS_ATSC:
			default:
				new_rf = 0;
				break;
			}
		simple_set_rf_input(fe, &buf[2], &buf[3], new_rf);
		break;
	}
	default:
		break;
	}
}

static u32 simple_dvb_configure(struct dvb_frontend *fe, u8 *buf,
				const u32 delsys,
				const u32 freq,
				const u32 bw)
{
	/* This function returns the tuned frequency on success, 0 on error */
	struct tuner_simple_priv *priv = fe->tuner_priv;
	struct tunertype *tun = priv->tun;
	struct tuner_params *t_params;
	u8 config, cb;
	u32 div;
	int ret;
	u32 frequency = freq / 62500;

	if (!tun->stepsize) {
		/* tuner-core was loaded before the digital tuner was
		 * configured and somehow picked the wrong tuner type */
		tuner_err("attempt to treat tuner %d (%s) as digital tuner without stepsize defined.\n",
			  priv->type, priv->tun->name);
		return 0; /* failure */
	}

	t_params = simple_tuner_params(fe, TUNER_PARAM_TYPE_DIGITAL);
	ret = simple_config_lookup(fe, t_params, &frequency, &config, &cb);
	if (ret < 0)
		return 0; /* failure */

	div = ((frequency + t_params->iffreq) * 62500 + offset +
	       tun->stepsize/2) / tun->stepsize;

	buf[0] = div >> 8;
	buf[1] = div & 0xff;
	buf[2] = config;
	buf[3] = cb;

	simple_set_dvb(fe, buf, delsys, freq, bw);

	tuner_dbg("%s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n",
		  tun->name, div, buf[0], buf[1], buf[2], buf[3]);

	/* calculate the frequency we set it to */
	return (div * tun->stepsize) - t_params->iffreq;
}

static int simple_dvb_calc_regs(struct dvb_frontend *fe,
				u8 *buf, int buf_len)
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	u32 delsys = c->delivery_system;
	u32 bw = c->bandwidth_hz;
	struct tuner_simple_priv *priv = fe->tuner_priv;
	u32 frequency;

	if (buf_len < 5)
		return -EINVAL;

	frequency = simple_dvb_configure(fe, buf+1, delsys, c->frequency, bw);
	if (frequency == 0)
		return -EINVAL;

	buf[0] = priv->i2c_props.addr;

	priv->frequency = frequency;
	priv->bandwidth = c->bandwidth_hz;

	return 5;
}

static int simple_dvb_set_params(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	u32 delsys = c->delivery_system;
	u32 bw = c->bandwidth_hz;
	u32 freq = c->frequency;
	struct tuner_simple_priv *priv = fe->tuner_priv;
	u32 frequency;
	u32 prev_freq, prev_bw;
	int ret;
	u8 buf[5];

	if (priv->i2c_props.adap == NULL)
		return -EINVAL;

	prev_freq = priv->frequency;
	prev_bw   = priv->bandwidth;

	frequency = simple_dvb_configure(fe, buf+1, delsys, freq, bw);
	if (frequency == 0)
		return -EINVAL;

	buf[0] = priv->i2c_props.addr;

	priv->frequency = frequency;
	priv->bandwidth = bw;

	/* put analog demod in standby when tuning digital */
	if (fe->ops.analog_ops.standby)
		fe->ops.analog_ops.standby(fe);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	/* buf[0] contains the i2c address, but *
	 * we already have it in i2c_props.addr */
	ret = tuner_i2c_xfer_send(&priv->i2c_props, buf+1, 4);
	if (ret != 4)
		goto fail;

	return 0;
fail:
	/* calc_regs sets frequency and bandwidth. if we failed, unset them */
	priv->frequency = prev_freq;
	priv->bandwidth = prev_bw;

	return ret;
}

static int simple_init(struct dvb_frontend *fe)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;

	if (priv->i2c_props.adap == NULL)
		return -EINVAL;

	if (priv->tun->initdata) {
		int ret;

		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);

		ret = tuner_i2c_xfer_send(&priv->i2c_props,
					  priv->tun->initdata + 1,
					  priv->tun->initdata[0]);
		if (ret != priv->tun->initdata[0])
			return ret;
	}

	return 0;
}

static int simple_sleep(struct dvb_frontend *fe)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;

	if (priv->i2c_props.adap == NULL)
		return -EINVAL;

	if (priv->tun->sleepdata) {
		int ret;

		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);

		ret = tuner_i2c_xfer_send(&priv->i2c_props,
					  priv->tun->sleepdata + 1,
					  priv->tun->sleepdata[0]);
		if (ret != priv->tun->sleepdata[0])
			return ret;
	}

	return 0;
}

static void simple_release(struct dvb_frontend *fe)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;

	mutex_lock(&tuner_simple_list_mutex);

	if (priv)
		hybrid_tuner_release_state(priv);

	mutex_unlock(&tuner_simple_list_mutex);

	fe->tuner_priv = NULL;
}

static int simple_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	*frequency = priv->frequency;
	return 0;
}

static int simple_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	*bandwidth = priv->bandwidth;
	return 0;
}

static const struct dvb_tuner_ops simple_tuner_ops = {
	.init              = simple_init,
	.sleep             = simple_sleep,
	.set_analog_params = simple_set_params,
	.set_params        = simple_dvb_set_params,
	.calc_regs         = simple_dvb_calc_regs,
	.release           = simple_release,
	.get_frequency     = simple_get_frequency,
	.get_bandwidth     = simple_get_bandwidth,
	.get_status        = simple_get_status,
	.get_rf_strength   = simple_get_rf_strength,
};

struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
					 struct i2c_adapter *i2c_adap,
					 u8 i2c_addr,
					 unsigned int type)
{
	struct tuner_simple_priv *priv = NULL;
	int instance;

	if (type >= tuner_count) {
		printk(KERN_WARNING "%s: invalid tuner type: %d (max: %d)\n",
		       __func__, type, tuner_count-1);
		return NULL;
	}

	/* If i2c_adap is set, check that the tuner is at the correct address.
	 * Otherwise, if i2c_adap is NULL, the tuner will be programmed directly
	 * by the digital demod via calc_regs.
	 */
	if (i2c_adap != NULL) {
		u8 b[1];
		struct i2c_msg msg = {
			.addr = i2c_addr, .flags = I2C_M_RD,
			.buf = b, .len = 1,
		};

		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);

		if (1 != i2c_transfer(i2c_adap, &msg, 1))
			printk(KERN_WARNING "tuner-simple %d-%04x: unable to probe %s, proceeding anyway.",
			       i2c_adapter_id(i2c_adap), i2c_addr,
			       tuners[type].name);

		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 0);
	}

	mutex_lock(&tuner_simple_list_mutex);

	instance = hybrid_tuner_request_state(struct tuner_simple_priv, priv,
					      hybrid_tuner_instance_list,
					      i2c_adap, i2c_addr,
					      "tuner-simple");
	switch (instance) {
	case 0:
		mutex_unlock(&tuner_simple_list_mutex);
		return NULL;
	case 1:
		fe->tuner_priv = priv;

		priv->type = type;
		priv->tun  = &tuners[type];
		priv->nr   = simple_devcount++;
		break;
	default:
		fe->tuner_priv = priv;
		break;
	}

	mutex_unlock(&tuner_simple_list_mutex);

	memcpy(&fe->ops.tuner_ops, &simple_tuner_ops,
	       sizeof(struct dvb_tuner_ops));

	if (type != priv->type)
		tuner_warn("couldn't set type to %d. Using %d (%s) instead\n",
			    type, priv->type, priv->tun->name);
	else
		tuner_info("type set to %d (%s)\n",
			   priv->type, priv->tun->name);

	if ((debug) || ((atv_input[priv->nr] > 0) ||
			(dtv_input[priv->nr] > 0))) {
		if (0 == atv_input[priv->nr])
			tuner_info("tuner %d atv rf input will be autoselected\n",
				   priv->nr);
		else
			tuner_info("tuner %d atv rf input will be set to input %d (insmod option)\n",
				   priv->nr, atv_input[priv->nr]);
		if (0 == dtv_input[priv->nr])
			tuner_info("tuner %d dtv rf input will be autoselected\n",
				   priv->nr);
		else
			tuner_info("tuner %d dtv rf input will be set to input %d (insmod option)\n",
				   priv->nr, dtv_input[priv->nr]);
	}

	strlcpy(fe->ops.tuner_ops.info.name, priv->tun->name,
		sizeof(fe->ops.tuner_ops.info.name));

	return fe;
}
EXPORT_SYMBOL_GPL(simple_tuner_attach);

MODULE_DESCRIPTION("Simple 4-control-bytes style tuner driver");
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
MODULE_LICENSE("GPL");