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
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/tuner.h>
#include "tuner-i2c.h"
#include "tda9887.h"


/* Chips:
   TDA9885 (PAL, NTSC)
   TDA9886 (PAL, SECAM, NTSC)
   TDA9887 (PAL, SECAM, NTSC, FM Radio)

   Used as part of several tuners
*/

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

static DEFINE_MUTEX(tda9887_list_mutex);
static LIST_HEAD(hybrid_tuner_instance_list);

struct tda9887_priv {
	struct tuner_i2c_props i2c_props;
	struct list_head hybrid_tuner_instance_list;

	unsigned char 	   data[4];
	unsigned int       config;
	unsigned int       mode;
	unsigned int       audmode;
	v4l2_std_id        std;

	bool               standby;
};

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

#define UNSET       (-1U)

struct tvnorm {
	v4l2_std_id       std;
	char              *name;
	unsigned char     b;
	unsigned char     c;
	unsigned char     e;
};

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

//
// TDA defines
//

//// first reg (b)
#define cVideoTrapBypassOFF     0x00    // bit b0
#define cVideoTrapBypassON      0x01    // bit b0

#define cAutoMuteFmInactive     0x00    // bit b1
#define cAutoMuteFmActive       0x02    // bit b1

#define cIntercarrier           0x00    // bit b2
#define cQSS                    0x04    // bit b2

#define cPositiveAmTV           0x00    // bit b3:4
#define cFmRadio                0x08    // bit b3:4
#define cNegativeFmTV           0x10    // bit b3:4


#define cForcedMuteAudioON      0x20    // bit b5
#define cForcedMuteAudioOFF     0x00    // bit b5

#define cOutputPort1Active      0x00    // bit b6
#define cOutputPort1Inactive    0x40    // bit b6

#define cOutputPort2Active      0x00    // bit b7
#define cOutputPort2Inactive    0x80    // bit b7


//// second reg (c)
#define cDeemphasisOFF          0x00    // bit c5
#define cDeemphasisON           0x20    // bit c5

#define cDeemphasis75           0x00    // bit c6
#define cDeemphasis50           0x40    // bit c6

#define cAudioGain0             0x00    // bit c7
#define cAudioGain6             0x80    // bit c7

#define cTopMask                0x1f    // bit c0:4
#define cTopDefault		0x10 	// bit c0:4

//// third reg (e)
#define cAudioIF_4_5             0x00    // bit e0:1
#define cAudioIF_5_5             0x01    // bit e0:1
#define cAudioIF_6_0             0x02    // bit e0:1
#define cAudioIF_6_5             0x03    // bit e0:1


#define cVideoIFMask		0x1c	// bit e2:4
/* Video IF selection in TV Mode (bit B3=0) */
#define cVideoIF_58_75           0x00    // bit e2:4
#define cVideoIF_45_75           0x04    // bit e2:4
#define cVideoIF_38_90           0x08    // bit e2:4
#define cVideoIF_38_00           0x0C    // bit e2:4
#define cVideoIF_33_90           0x10    // bit e2:4
#define cVideoIF_33_40           0x14    // bit e2:4
#define cRadioIF_45_75           0x18    // bit e2:4
#define cRadioIF_38_90           0x1C    // bit e2:4

/* IF1 selection in Radio Mode (bit B3=1) */
#define cRadioIF_33_30		0x00	// bit e2,4 (also 0x10,0x14)
#define cRadioIF_41_30		0x04	// bit e2,4

/* Output of AFC pin in radio mode when bit E7=1 */
#define cRadioAGC_SIF		0x00	// bit e3
#define cRadioAGC_FM		0x08	// bit e3

#define cTunerGainNormal         0x00    // bit e5
#define cTunerGainLow            0x20    // bit e5

#define cGating_18               0x00    // bit e6
#define cGating_36               0x40    // bit e6

#define cAgcOutON                0x80    // bit e7
#define cAgcOutOFF               0x00    // bit e7

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

static struct tvnorm tvnorms[] = {
	{
		.std   = V4L2_STD_PAL_BG | V4L2_STD_PAL_H | V4L2_STD_PAL_N,
		.name  = "PAL-BGHN",
		.b     = ( cNegativeFmTV  |
			   cQSS           ),
		.c     = ( cDeemphasisON  |
			   cDeemphasis50  |
			   cTopDefault),
		.e     = ( cGating_36     |
			   cAudioIF_5_5   |
			   cVideoIF_38_90 ),
	},{
		.std   = V4L2_STD_PAL_I,
		.name  = "PAL-I",
		.b     = ( cNegativeFmTV  |
			   cQSS           ),
		.c     = ( cDeemphasisON  |
			   cDeemphasis50  |
			   cTopDefault),
		.e     = ( cGating_36     |
			   cAudioIF_6_0   |
			   cVideoIF_38_90 ),
	},{
		.std   = V4L2_STD_PAL_DK,
		.name  = "PAL-DK",
		.b     = ( cNegativeFmTV  |
			   cQSS           ),
		.c     = ( cDeemphasisON  |
			   cDeemphasis50  |
			   cTopDefault),
		.e     = ( cGating_36     |
			   cAudioIF_6_5   |
			   cVideoIF_38_90 ),
	},{
		.std   = V4L2_STD_PAL_M | V4L2_STD_PAL_Nc,
		.name  = "PAL-M/Nc",
		.b     = ( cNegativeFmTV  |
			   cQSS           ),
		.c     = ( cDeemphasisON  |
			   cDeemphasis75  |
			   cTopDefault),
		.e     = ( cGating_36     |
			   cAudioIF_4_5   |
			   cVideoIF_45_75 ),
	},{
		.std   = V4L2_STD_SECAM_B | V4L2_STD_SECAM_G | V4L2_STD_SECAM_H,
		.name  = "SECAM-BGH",
		.b     = ( cNegativeFmTV  |
			   cQSS           ),
		.c     = ( cTopDefault),
		.e     = ( cAudioIF_5_5   |
			   cVideoIF_38_90 ),
	},{
		.std   = V4L2_STD_SECAM_L,
		.name  = "SECAM-L",
		.b     = ( cPositiveAmTV  |
			   cQSS           ),
		.c     = ( cTopDefault),
		.e     = ( cGating_36	  |
			   cAudioIF_6_5   |
			   cVideoIF_38_90 ),
	},{
		.std   = V4L2_STD_SECAM_LC,
		.name  = "SECAM-L'",
		.b     = ( cOutputPort2Inactive |
			   cPositiveAmTV  |
			   cQSS           ),
		.c     = ( cTopDefault),
		.e     = ( cGating_36	  |
			   cAudioIF_6_5   |
			   cVideoIF_33_90 ),
	},{
		.std   = V4L2_STD_SECAM_DK,
		.name  = "SECAM-DK",
		.b     = ( cNegativeFmTV  |
			   cQSS           ),
		.c     = ( cDeemphasisON  |
			   cDeemphasis50  |
			   cTopDefault),
		.e     = ( cGating_36     |
			   cAudioIF_6_5   |
			   cVideoIF_38_90 ),
	},{
		.std   = V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_KR,
		.name  = "NTSC-M",
		.b     = ( cNegativeFmTV  |
			   cQSS           ),
		.c     = ( cDeemphasisON  |
			   cDeemphasis75  |
			   cTopDefault),
		.e     = ( cGating_36     |
			   cAudioIF_4_5   |
			   cVideoIF_45_75 ),
	},{
		.std   = V4L2_STD_NTSC_M_JP,
		.name  = "NTSC-M-JP",
		.b     = ( cNegativeFmTV  |
			   cQSS           ),
		.c     = ( cDeemphasisON  |
			   cDeemphasis50  |
			   cTopDefault),
		.e     = ( cGating_36     |
			   cAudioIF_4_5   |
			   cVideoIF_58_75 ),
	}
};

static struct tvnorm radio_stereo = {
	.name = "Radio Stereo",
	.b    = ( cFmRadio       |
		  cQSS           ),
	.c    = ( cDeemphasisOFF |
		  cAudioGain6    |
		  cTopDefault),
	.e    = ( cTunerGainLow  |
		  cAudioIF_5_5   |
		  cRadioIF_38_90 ),
};

static struct tvnorm radio_mono = {
	.name = "Radio Mono",
	.b    = ( cFmRadio       |
		  cQSS           ),
	.c    = ( cDeemphasisON  |
		  cDeemphasis75  |
		  cTopDefault),
	.e    = ( cTunerGainLow  |
		  cAudioIF_5_5   |
		  cRadioIF_38_90 ),
};

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

static void dump_read_message(struct dvb_frontend *fe, unsigned char *buf)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;

	static char *afc[16] = {
		"- 12.5 kHz",
		"- 37.5 kHz",
		"- 62.5 kHz",
		"- 87.5 kHz",
		"-112.5 kHz",
		"-137.5 kHz",
		"-162.5 kHz",
		"-187.5 kHz [min]",
		"+187.5 kHz [max]",
		"+162.5 kHz",
		"+137.5 kHz",
		"+112.5 kHz",
		"+ 87.5 kHz",
		"+ 62.5 kHz",
		"+ 37.5 kHz",
		"+ 12.5 kHz",
	};
	tuner_info("read: 0x%2x\n", buf[0]);
	tuner_info("  after power on : %s\n", (buf[0] & 0x01) ? "yes" : "no");
	tuner_info("  afc            : %s\n", afc[(buf[0] >> 1) & 0x0f]);
	tuner_info("  fmif level     : %s\n", (buf[0] & 0x20) ? "high" : "low");
	tuner_info("  afc window     : %s\n", (buf[0] & 0x40) ? "in" : "out");
	tuner_info("  vfi level      : %s\n", (buf[0] & 0x80) ? "high" : "low");
}

static void dump_write_message(struct dvb_frontend *fe, unsigned char *buf)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;

	static char *sound[4] = {
		"AM/TV",
		"FM/radio",
		"FM/TV",
		"FM/radio"
	};
	static char *adjust[32] = {
		"-16", "-15", "-14", "-13", "-12", "-11", "-10", "-9",
		"-8",  "-7",  "-6",  "-5",  "-4",  "-3",  "-2",  "-1",
		"0",   "+1",  "+2",  "+3",  "+4",  "+5",  "+6",  "+7",
		"+8",  "+9",  "+10", "+11", "+12", "+13", "+14", "+15"
	};
	static char *deemph[4] = {
		"no", "no", "75", "50"
	};
	static char *carrier[4] = {
		"4.5 MHz",
		"5.5 MHz",
		"6.0 MHz",
		"6.5 MHz / AM"
	};
	static char *vif[8] = {
		"58.75 MHz",
		"45.75 MHz",
		"38.9 MHz",
		"38.0 MHz",
		"33.9 MHz",
		"33.4 MHz",
		"45.75 MHz + pin13",
		"38.9 MHz + pin13",
	};
	static char *rif[4] = {
		"44 MHz",
		"52 MHz",
		"52 MHz",
		"44 MHz",
	};

	tuner_info("write: byte B 0x%02x\n", buf[1]);
	tuner_info("  B0   video mode      : %s\n",
		   (buf[1] & 0x01) ? "video trap" : "sound trap");
	tuner_info("  B1   auto mute fm    : %s\n",
		   (buf[1] & 0x02) ? "yes" : "no");
	tuner_info("  B2   carrier mode    : %s\n",
		   (buf[1] & 0x04) ? "QSS" : "Intercarrier");
	tuner_info("  B3-4 tv sound/radio  : %s\n",
		   sound[(buf[1] & 0x18) >> 3]);
	tuner_info("  B5   force mute audio: %s\n",
		   (buf[1] & 0x20) ? "yes" : "no");
	tuner_info("  B6   output port 1   : %s\n",
		   (buf[1] & 0x40) ? "high (inactive)" : "low (active)");
	tuner_info("  B7   output port 2   : %s\n",
		   (buf[1] & 0x80) ? "high (inactive)" : "low (active)");

	tuner_info("write: byte C 0x%02x\n", buf[2]);
	tuner_info("  C0-4 top adjustment  : %s dB\n",
		   adjust[buf[2] & 0x1f]);
	tuner_info("  C5-6 de-emphasis     : %s\n",
		   deemph[(buf[2] & 0x60) >> 5]);
	tuner_info("  C7   audio gain      : %s\n",
		   (buf[2] & 0x80) ? "-6" : "0");

	tuner_info("write: byte E 0x%02x\n", buf[3]);
	tuner_info("  E0-1 sound carrier   : %s\n",
		   carrier[(buf[3] & 0x03)]);
	tuner_info("  E6   l pll gating   : %s\n",
		   (buf[3] & 0x40) ? "36" : "13");

	if (buf[1] & 0x08) {
		/* radio */
		tuner_info("  E2-4 video if        : %s\n",
			   rif[(buf[3] & 0x0c) >> 2]);
		tuner_info("  E7   vif agc output  : %s\n",
			   (buf[3] & 0x80)
			   ? ((buf[3] & 0x10) ? "fm-agc radio" :
						"sif-agc radio")
			   : "fm radio carrier afc");
	} else {
		/* video */
		tuner_info("  E2-4 video if        : %s\n",
			   vif[(buf[3] & 0x1c) >> 2]);
		tuner_info("  E5   tuner gain      : %s\n",
			   (buf[3] & 0x80)
			   ? ((buf[3] & 0x20) ? "external" : "normal")
			   : ((buf[3] & 0x20) ? "minimum"  : "normal"));
		tuner_info("  E7   vif agc output  : %s\n",
			   (buf[3] & 0x80) ? ((buf[3] & 0x20)
				? "pin3 port, pin22 vif agc out"
				: "pin22 port, pin3 vif acg ext in")
				: "pin3+pin22 port");
	}
	tuner_info("--\n");
}

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

static int tda9887_set_tvnorm(struct dvb_frontend *fe)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;
	struct tvnorm *norm = NULL;
	char *buf = priv->data;
	int i;

	if (priv->mode == V4L2_TUNER_RADIO) {
		if (priv->audmode == V4L2_TUNER_MODE_MONO)
			norm = &radio_mono;
		else
			norm = &radio_stereo;
	} else {
		for (i = 0; i < ARRAY_SIZE(tvnorms); i++) {
			if (tvnorms[i].std & priv->std) {
				norm = tvnorms+i;
				break;
			}
		}
	}
	if (NULL == norm) {
		tuner_dbg("Unsupported tvnorm entry - audio muted\n");
		return -1;
	}

	tuner_dbg("configure for: %s\n", norm->name);
	buf[1] = norm->b;
	buf[2] = norm->c;
	buf[3] = norm->e;
	return 0;
}

static unsigned int port1  = UNSET;
static unsigned int port2  = UNSET;
static unsigned int qss    = UNSET;
static unsigned int adjust = UNSET;

module_param(port1, int, 0644);
module_param(port2, int, 0644);
module_param(qss, int, 0644);
module_param(adjust, int, 0644);

static int tda9887_set_insmod(struct dvb_frontend *fe)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;
	char *buf = priv->data;

	if (UNSET != port1) {
		if (port1)
			buf[1] |= cOutputPort1Inactive;
		else
			buf[1] &= ~cOutputPort1Inactive;
	}
	if (UNSET != port2) {
		if (port2)
			buf[1] |= cOutputPort2Inactive;
		else
			buf[1] &= ~cOutputPort2Inactive;
	}

	if (UNSET != qss) {
		if (qss)
			buf[1] |= cQSS;
		else
			buf[1] &= ~cQSS;
	}

	if (adjust < 0x20) {
		buf[2] &= ~cTopMask;
		buf[2] |= adjust;
	}
	return 0;
}

static int tda9887_do_config(struct dvb_frontend *fe)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;
	char *buf = priv->data;

	if (priv->config & TDA9887_PORT1_ACTIVE)
		buf[1] &= ~cOutputPort1Inactive;
	if (priv->config & TDA9887_PORT1_INACTIVE)
		buf[1] |= cOutputPort1Inactive;
	if (priv->config & TDA9887_PORT2_ACTIVE)
		buf[1] &= ~cOutputPort2Inactive;
	if (priv->config & TDA9887_PORT2_INACTIVE)
		buf[1] |= cOutputPort2Inactive;

	if (priv->config & TDA9887_QSS)
		buf[1] |= cQSS;
	if (priv->config & TDA9887_INTERCARRIER)
		buf[1] &= ~cQSS;

	if (priv->config & TDA9887_AUTOMUTE)
		buf[1] |= cAutoMuteFmActive;
	if (priv->config & TDA9887_DEEMPHASIS_MASK) {
		buf[2] &= ~0x60;
		switch (priv->config & TDA9887_DEEMPHASIS_MASK) {
		case TDA9887_DEEMPHASIS_NONE:
			buf[2] |= cDeemphasisOFF;
			break;
		case TDA9887_DEEMPHASIS_50:
			buf[2] |= cDeemphasisON | cDeemphasis50;
			break;
		case TDA9887_DEEMPHASIS_75:
			buf[2] |= cDeemphasisON | cDeemphasis75;
			break;
		}
	}
	if (priv->config & TDA9887_TOP_SET) {
		buf[2] &= ~cTopMask;
		buf[2] |= (priv->config >> 8) & cTopMask;
	}
	if ((priv->config & TDA9887_INTERCARRIER_NTSC) &&
	    (priv->std & V4L2_STD_NTSC))
		buf[1] &= ~cQSS;
	if (priv->config & TDA9887_GATING_18)
		buf[3] &= ~cGating_36;

	if (priv->mode == V4L2_TUNER_RADIO) {
		if (priv->config & TDA9887_RIF_41_3) {
			buf[3] &= ~cVideoIFMask;
			buf[3] |= cRadioIF_41_30;
		}
		if (priv->config & TDA9887_GAIN_NORMAL)
			buf[3] &= ~cTunerGainLow;
	}

	return 0;
}

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

static int tda9887_status(struct dvb_frontend *fe)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;
	unsigned char buf[1];
	int rc;

	memset(buf,0,sizeof(buf));
	if (1 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props,buf,1)))
		tuner_info("i2c i/o error: rc == %d (should be 1)\n", rc);
	dump_read_message(fe, buf);
	return 0;
}

static void tda9887_configure(struct dvb_frontend *fe)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;
	int rc;

	memset(priv->data,0,sizeof(priv->data));
	tda9887_set_tvnorm(fe);

	/* A note on the port settings:
	   These settings tend to depend on the specifics of the board.
	   By default they are set to inactive (bit value 1) by this driver,
	   overwriting any changes made by the tvnorm. This means that it
	   is the responsibility of the module using the tda9887 to set
	   these values in case of changes in the tvnorm.
	   In many cases port 2 should be made active (0) when selecting
	   SECAM-L, and port 2 should remain inactive (1) for SECAM-L'.

	   For the other standards the tda9887 application note says that
	   the ports should be set to active (0), but, again, that may
	   differ depending on the precise hardware configuration.
	 */
	priv->data[1] |= cOutputPort1Inactive;
	priv->data[1] |= cOutputPort2Inactive;

	tda9887_do_config(fe);
	tda9887_set_insmod(fe);

	if (priv->standby)
		priv->data[1] |= cForcedMuteAudioON;

	tuner_dbg("writing: b=0x%02x c=0x%02x e=0x%02x\n",
		  priv->data[1], priv->data[2], priv->data[3]);
	if (debug > 1)
		dump_write_message(fe, priv->data);

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

	if (debug > 2) {
		msleep_interruptible(1000);
		tda9887_status(fe);
	}
}

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

static void tda9887_tuner_status(struct dvb_frontend *fe)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;
	tuner_info("Data bytes: b=0x%02x c=0x%02x e=0x%02x\n",
		   priv->data[1], priv->data[2], priv->data[3]);
}

static int tda9887_get_afc(struct dvb_frontend *fe, s32 *afc)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;
	static const int AFC_BITS_2_kHz[] = {
		-12500,  -37500,  -62500,  -97500,
		-112500, -137500, -162500, -187500,
		187500,  162500,  137500,  112500,
		97500 ,  62500,   37500 ,  12500
	};
	__u8 reg = 0;

	if (priv->mode != V4L2_TUNER_RADIO)
		return 0;
	if (1 == tuner_i2c_xfer_recv(&priv->i2c_props, &reg, 1))
		*afc = AFC_BITS_2_kHz[(reg >> 1) & 0x0f];
	return 0;
}

static void tda9887_standby(struct dvb_frontend *fe)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;

	priv->standby = true;

	tda9887_configure(fe);
}

static void tda9887_set_params(struct dvb_frontend *fe,
			       struct analog_parameters *params)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;

	priv->standby = false;
	priv->mode    = params->mode;
	priv->audmode = params->audmode;
	priv->std     = params->std;
	tda9887_configure(fe);
}

static int tda9887_set_config(struct dvb_frontend *fe, void *priv_cfg)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;

	priv->config = *(unsigned int *)priv_cfg;
	tda9887_configure(fe);

	return 0;
}

static void tda9887_release(struct dvb_frontend *fe)
{
	struct tda9887_priv *priv = fe->analog_demod_priv;

	mutex_lock(&tda9887_list_mutex);

	if (priv)
		hybrid_tuner_release_state(priv);

	mutex_unlock(&tda9887_list_mutex);

	fe->analog_demod_priv = NULL;
}

static struct analog_demod_ops tda9887_ops = {
	.info		= {
		.name	= "tda9887",
	},
	.set_params     = tda9887_set_params,
	.standby        = tda9887_standby,
	.tuner_status   = tda9887_tuner_status,
	.get_afc        = tda9887_get_afc,
	.release        = tda9887_release,
	.set_config     = tda9887_set_config,
};

struct dvb_frontend *tda9887_attach(struct dvb_frontend *fe,
				    struct i2c_adapter *i2c_adap,
				    u8 i2c_addr)
{
	struct tda9887_priv *priv = NULL;
	int instance;

	mutex_lock(&tda9887_list_mutex);

	instance = hybrid_tuner_request_state(struct tda9887_priv, priv,
					      hybrid_tuner_instance_list,
					      i2c_adap, i2c_addr, "tda9887");
	switch (instance) {
	case 0:
		mutex_unlock(&tda9887_list_mutex);
		return NULL;
	case 1:
		fe->analog_demod_priv = priv;
		priv->standby = true;
		tuner_info("tda988[5/6/7] found\n");
		break;
	default:
		fe->analog_demod_priv = priv;
		break;
	}

	mutex_unlock(&tda9887_list_mutex);

	memcpy(&fe->ops.analog_ops, &tda9887_ops,
	       sizeof(struct analog_demod_ops));

	return fe;
}
EXPORT_SYMBOL_GPL(tda9887_attach);

MODULE_LICENSE("GPL");

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