summaryrefslogtreecommitdiffstats
path: root/drivers/media/tuners/tda8290.c
blob: 998e82bba9c0d1a13bd5fad9fe0bcce8dbfefc86 (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
/*

   i2c tv tuner chip device driver
   controls the philips tda8290+75 tuner chip combo.

   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.

   This "tda8290" module was split apart from the original "tuner" module.
*/

#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include "tuner-i2c.h"
#include "tda8290.h"
#include "tda827x.h"
#include "tda18271.h"

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

static int deemphasis_50;
module_param(deemphasis_50, int, 0644);
MODULE_PARM_DESC(deemphasis_50, "0 - 75us deemphasis; 1 - 50us deemphasis");

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

struct tda8290_priv {
	struct tuner_i2c_props i2c_props;

	unsigned char tda8290_easy_mode;

	unsigned char tda827x_addr;

	unsigned char ver;
#define TDA8290   1
#define TDA8295   2
#define TDA8275   4
#define TDA8275A  8
#define TDA18271 16

	struct tda827x_config cfg;
	struct tda18271_std_map *tda18271_std_map;
};

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

static int tda8290_i2c_bridge(struct dvb_frontend *fe, int close)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char  enable[2] = { 0x21, 0xC0 };
	unsigned char disable[2] = { 0x21, 0x00 };
	unsigned char *msg;

	if (close) {
		msg = enable;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
		/* let the bridge stabilize */
		msleep(20);
	} else {
		msg = disable;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
	}

	return 0;
}

static int tda8295_i2c_bridge(struct dvb_frontend *fe, int close)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char  enable[2] = { 0x45, 0xc1 };
	unsigned char disable[2] = { 0x46, 0x00 };
	unsigned char buf[3] = { 0x45, 0x01, 0x00 };
	unsigned char *msg;

	if (close) {
		msg = enable;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
		/* let the bridge stabilize */
		msleep(20);
	} else {
		msg = disable;
		tuner_i2c_xfer_send_recv(&priv->i2c_props, msg, 1, &msg[1], 1);

		buf[2] = msg[1];
		buf[2] &= ~0x04;
		tuner_i2c_xfer_send(&priv->i2c_props, buf, 3);
		msleep(5);

		msg[1] |= 0x04;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
	}

	return 0;
}

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

static void set_audio(struct dvb_frontend *fe,
		      struct analog_parameters *params)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	char* mode;

	if (params->std & V4L2_STD_MN) {
		priv->tda8290_easy_mode = 0x01;
		mode = "MN";
	} else if (params->std & V4L2_STD_B) {
		priv->tda8290_easy_mode = 0x02;
		mode = "B";
	} else if (params->std & V4L2_STD_GH) {
		priv->tda8290_easy_mode = 0x04;
		mode = "GH";
	} else if (params->std & V4L2_STD_PAL_I) {
		priv->tda8290_easy_mode = 0x08;
		mode = "I";
	} else if (params->std & V4L2_STD_DK) {
		priv->tda8290_easy_mode = 0x10;
		mode = "DK";
	} else if (params->std & V4L2_STD_SECAM_L) {
		priv->tda8290_easy_mode = 0x20;
		mode = "L";
	} else if (params->std & V4L2_STD_SECAM_LC) {
		priv->tda8290_easy_mode = 0x40;
		mode = "LC";
	} else {
		priv->tda8290_easy_mode = 0x10;
		mode = "xx";
	}

	if (params->mode == V4L2_TUNER_RADIO) {
		/* Set TDA8295 to FM radio; Start TDA8290 with MN values */
		priv->tda8290_easy_mode = (priv->ver & TDA8295) ? 0x80 : 0x01;
		tuner_dbg("setting to radio FM\n");
	} else {
		tuner_dbg("setting tda829x to system %s\n", mode);
	}
}

static struct {
	unsigned char seq[2];
} fm_mode[] = {
	{ { 0x01, 0x81} },	/* Put device into expert mode */
	{ { 0x03, 0x48} },	/* Disable NOTCH and VIDEO filters */
	{ { 0x04, 0x04} },	/* Disable color carrier filter (SSIF) */
	{ { 0x05, 0x04} },	/* ADC headroom */
	{ { 0x06, 0x10} },	/* group delay flat */

	{ { 0x07, 0x00} },	/* use the same radio DTO values as a tda8295 */
	{ { 0x08, 0x00} },
	{ { 0x09, 0x80} },
	{ { 0x0a, 0xda} },
	{ { 0x0b, 0x4b} },
	{ { 0x0c, 0x68} },

	{ { 0x0d, 0x00} },	/* PLL off, no video carrier detect */
	{ { 0x14, 0x00} },	/* disable auto mute if no video */
};

static void tda8290_set_params(struct dvb_frontend *fe,
			       struct analog_parameters *params)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char soft_reset[]  = { 0x00, 0x00 };
	unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
	unsigned char expert_mode[] = { 0x01, 0x80 };
	unsigned char agc_out_on[]  = { 0x02, 0x00 };
	unsigned char gainset_off[] = { 0x28, 0x14 };
	unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
	unsigned char adc_head_6[]  = { 0x05, 0x04 };
	unsigned char adc_head_9[]  = { 0x05, 0x02 };
	unsigned char adc_head_12[] = { 0x05, 0x01 };
	unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
	unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
	unsigned char gainset_2[]   = { 0x28, 0x64 };
	unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
	unsigned char agc_rst_off[] = { 0x0e, 0x09 };
	unsigned char if_agc_set[]  = { 0x0f, 0x81 };
	unsigned char addr_adc_sat  = 0x1a;
	unsigned char addr_agc_stat = 0x1d;
	unsigned char addr_pll_stat = 0x1b;
	unsigned char adc_sat, agc_stat,
		      pll_stat;
	int i;

	set_audio(fe, params);

	if (priv->cfg.config)
		tuner_dbg("tda827xa config is 0x%02x\n", priv->cfg.config);
	tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
	msleep(1);

	if (params->mode == V4L2_TUNER_RADIO) {
		unsigned char deemphasis[]  = { 0x13, 1 };

		/* FIXME: allow using a different deemphasis */

		if (deemphasis_50)
			deemphasis[1] = 2;

		for (i = 0; i < ARRAY_SIZE(fm_mode); i++)
			tuner_i2c_xfer_send(&priv->i2c_props, fm_mode[i].seq, 2);

		tuner_i2c_xfer_send(&priv->i2c_props, deemphasis, 2);
	} else {
		expert_mode[1] = priv->tda8290_easy_mode + 0x80;
		tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
		tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
		tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
		if (priv->tda8290_easy_mode & 0x60)
			tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
		else
			tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
		tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);
	}


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

	if (fe->ops.tuner_ops.set_analog_params)
		fe->ops.tuner_ops.set_analog_params(fe, params);

	for (i = 0; i < 3; i++) {
		tuner_i2c_xfer_send_recv(&priv->i2c_props,
					 &addr_pll_stat, 1, &pll_stat, 1);
		if (pll_stat & 0x80) {
			tuner_i2c_xfer_send_recv(&priv->i2c_props,
						 &addr_adc_sat, 1,
						 &adc_sat, 1);
			tuner_i2c_xfer_send_recv(&priv->i2c_props,
						 &addr_agc_stat, 1,
						 &agc_stat, 1);
			tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
			break;
		} else {
			tuner_dbg("tda8290 not locked, no signal?\n");
			msleep(100);
		}
	}
	/* adjust headroom resp. gain */
	if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
		tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
			   agc_stat, adc_sat, pll_stat & 0x80);
		tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
		msleep(100);
		tuner_i2c_xfer_send_recv(&priv->i2c_props,
					 &addr_agc_stat, 1, &agc_stat, 1);
		tuner_i2c_xfer_send_recv(&priv->i2c_props,
					 &addr_pll_stat, 1, &pll_stat, 1);
		if ((agc_stat > 115) || !(pll_stat & 0x80)) {
			tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
				   agc_stat, pll_stat & 0x80);
			if (priv->cfg.agcf)
				priv->cfg.agcf(fe);
			msleep(100);
			tuner_i2c_xfer_send_recv(&priv->i2c_props,
						 &addr_agc_stat, 1,
						 &agc_stat, 1);
			tuner_i2c_xfer_send_recv(&priv->i2c_props,
						 &addr_pll_stat, 1,
						 &pll_stat, 1);
			if((agc_stat > 115) || !(pll_stat & 0x80)) {
				tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
				tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
				tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
				msleep(100);
			}
		}
	}

	/* l/ l' deadlock? */
	if(priv->tda8290_easy_mode & 0x60) {
		tuner_i2c_xfer_send_recv(&priv->i2c_props,
					 &addr_adc_sat, 1,
					 &adc_sat, 1);
		tuner_i2c_xfer_send_recv(&priv->i2c_props,
					 &addr_pll_stat, 1,
					 &pll_stat, 1);
		if ((adc_sat > 20) || !(pll_stat & 0x80)) {
			tuner_dbg("trying to resolve SECAM L deadlock\n");
			tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
			msleep(40);
			tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
		}
	}

	if (fe->ops.analog_ops.i2c_gate_ctrl)
		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
	tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
}

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

static void tda8295_power(struct dvb_frontend *fe, int enable)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char buf[] = { 0x30, 0x00 }; /* clb_stdbt */

	tuner_i2c_xfer_send_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);

	if (enable)
		buf[1] = 0x01;
	else
		buf[1] = 0x03;

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
}

static void tda8295_set_easy_mode(struct dvb_frontend *fe, int enable)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char buf[] = { 0x01, 0x00 };

	tuner_i2c_xfer_send_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);

	if (enable)
		buf[1] = 0x01; /* rising edge sets regs 0x02 - 0x23 */
	else
		buf[1] = 0x00; /* reset active bit */

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
}

static void tda8295_set_video_std(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char buf[] = { 0x00, priv->tda8290_easy_mode };

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);

	tda8295_set_easy_mode(fe, 1);
	msleep(20);
	tda8295_set_easy_mode(fe, 0);
}

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

static void tda8295_agc1_out(struct dvb_frontend *fe, int enable)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char buf[] = { 0x02, 0x00 }; /* DIV_FUNC */

	tuner_i2c_xfer_send_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);

	if (enable)
		buf[1] &= ~0x40;
	else
		buf[1] |= 0x40;

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
}

static void tda8295_agc2_out(struct dvb_frontend *fe, int enable)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char set_gpio_cf[]    = { 0x44, 0x00 };
	unsigned char set_gpio_val[]   = { 0x46, 0x00 };

	tuner_i2c_xfer_send_recv(&priv->i2c_props,
				 &set_gpio_cf[0], 1, &set_gpio_cf[1], 1);
	tuner_i2c_xfer_send_recv(&priv->i2c_props,
				 &set_gpio_val[0], 1, &set_gpio_val[1], 1);

	set_gpio_cf[1] &= 0xf0; /* clear GPIO_0 bits 3-0 */

	if (enable) {
		set_gpio_cf[1]  |= 0x01; /* config GPIO_0 as Open Drain Out */
		set_gpio_val[1] &= 0xfe; /* set GPIO_0 pin low */
	}
	tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_cf, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_val, 2);
}

static int tda8295_has_signal(struct dvb_frontend *fe, u16 *signal)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char hvpll_stat = 0x26;
	unsigned char ret;

	tuner_i2c_xfer_send_recv(&priv->i2c_props, &hvpll_stat, 1, &ret, 1);
	*signal = (ret & 0x01) ? 65535 : 0;
	return 0;
}

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

static void tda8295_set_params(struct dvb_frontend *fe,
			       struct analog_parameters *params)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	u16 signal = 0;
	unsigned char blanking_mode[]     = { 0x1d, 0x00 };

	set_audio(fe, params);

	tuner_dbg("%s: freq = %d\n", __func__, params->frequency);

	tda8295_power(fe, 1);
	tda8295_agc1_out(fe, 1);

	tuner_i2c_xfer_send_recv(&priv->i2c_props,
				 &blanking_mode[0], 1, &blanking_mode[1], 1);

	tda8295_set_video_std(fe);

	blanking_mode[1] = 0x03;
	tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
	msleep(20);

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

	if (fe->ops.tuner_ops.set_analog_params)
		fe->ops.tuner_ops.set_analog_params(fe, params);

	if (priv->cfg.agcf)
		priv->cfg.agcf(fe);

	tda8295_has_signal(fe, &signal);
	if (signal)
		tuner_dbg("tda8295 is locked\n");
	else
		tuner_dbg("tda8295 not locked, no signal?\n");

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

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

static int tda8290_has_signal(struct dvb_frontend *fe, u16 *signal)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char i2c_get_afc[1] = { 0x1B };
	unsigned char afc = 0;

	tuner_i2c_xfer_send_recv(&priv->i2c_props,
				 i2c_get_afc, ARRAY_SIZE(i2c_get_afc), &afc, 1);
	*signal = (afc & 0x80) ? 65535 : 0;
	return 0;
}

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

static void tda8290_standby(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char cb1[] = { 0x30, 0xD0 };
	unsigned char tda8290_standby[] = { 0x00, 0x02 };
	unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
	struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};

	if (fe->ops.analog_ops.i2c_gate_ctrl)
		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
	if (priv->ver & TDA8275A)
		cb1[1] = 0x90;
	i2c_transfer(priv->i2c_props.adap, &msg, 1);
	if (fe->ops.analog_ops.i2c_gate_ctrl)
		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
	tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2);
}

static void tda8295_standby(struct dvb_frontend *fe)
{
	tda8295_agc1_out(fe, 0); /* Put AGC in tri-state */

	tda8295_power(fe, 0);
}

static void tda8290_init_if(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char set_VS[] = { 0x30, 0x6F };
	unsigned char set_GP00_CF[] = { 0x20, 0x01 };
	unsigned char set_GP01_CF[] = { 0x20, 0x0B };

	if ((priv->cfg.config == TDA8290_LNA_GP0_HIGH_ON) ||
	    (priv->cfg.config == TDA8290_LNA_GP0_HIGH_OFF))
		tuner_i2c_xfer_send(&priv->i2c_props, set_GP00_CF, 2);
	else
		tuner_i2c_xfer_send(&priv->i2c_props, set_GP01_CF, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_VS, 2);
}

static void tda8295_init_if(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	static unsigned char set_adc_ctl[]       = { 0x33, 0x14 };
	static unsigned char set_adc_ctl2[]      = { 0x34, 0x00 };
	static unsigned char set_pll_reg6[]      = { 0x3e, 0x63 };
	static unsigned char set_pll_reg0[]      = { 0x38, 0x23 };
	static unsigned char set_pll_reg7[]      = { 0x3f, 0x01 };
	static unsigned char set_pll_reg10[]     = { 0x42, 0x61 };
	static unsigned char set_gpio_reg0[]     = { 0x44, 0x0b };

	tda8295_power(fe, 1);

	tda8295_set_easy_mode(fe, 0);
	tda8295_set_video_std(fe);

	tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl2, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg6, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg0, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg7, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg10, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_reg0, 2);

	tda8295_agc1_out(fe, 0);
	tda8295_agc2_out(fe, 0);
}

static void tda8290_init_tuner(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char tda8275_init[]  = { 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
					  0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
	unsigned char tda8275a_init[] = { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
					  0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
	struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0,
			      .buf=tda8275_init, .len = 14};
	if (priv->ver & TDA8275A)
		msg.buf = tda8275a_init;

	if (fe->ops.analog_ops.i2c_gate_ctrl)
		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_props.adap, &msg, 1);
	if (fe->ops.analog_ops.i2c_gate_ctrl)
		fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
}

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

static void tda829x_release(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	/* only try to release the tuner if we've
	 * attached it from within this module */
	if (priv->ver & (TDA18271 | TDA8275 | TDA8275A))
		if (fe->ops.tuner_ops.release)
			fe->ops.tuner_ops.release(fe);

	kfree(fe->analog_demod_priv);
	fe->analog_demod_priv = NULL;
}

static struct tda18271_config tda829x_tda18271_config = {
	.gate    = TDA18271_GATE_ANALOG,
};

static int tda829x_find_tuner(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	int i, ret, tuners_found;
	u32 tuner_addrs;
	u8 data;
	struct i2c_msg msg = { .flags = I2C_M_RD, .buf = &data, .len = 1 };

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

	/* probe for tuner chip */
	tuners_found = 0;
	tuner_addrs = 0;
	for (i = 0x60; i <= 0x63; i++) {
		msg.addr = i;
		ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
		if (ret == 1) {
			tuners_found++;
			tuner_addrs = (tuner_addrs << 8) + i;
		}
	}
	/* if there is more than one tuner, we expect the right one is
	   behind the bridge and we choose the highest address that doesn't
	   give a response now
	 */

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

	if (tuners_found > 1)
		for (i = 0; i < tuners_found; i++) {
			msg.addr = tuner_addrs  & 0xff;
			ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
			if (ret == 1)
				tuner_addrs = tuner_addrs >> 8;
			else
				break;
		}

	if (tuner_addrs == 0) {
		tuner_addrs = 0x60;
		tuner_info("could not clearly identify tuner address, "
			   "defaulting to %x\n", tuner_addrs);
	} else {
		tuner_addrs = tuner_addrs & 0xff;
		tuner_info("setting tuner address to %x\n", tuner_addrs);
	}
	priv->tda827x_addr = tuner_addrs;
	msg.addr = tuner_addrs;

	if (fe->ops.analog_ops.i2c_gate_ctrl)
		fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
	ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);

	if (ret != 1) {
		tuner_warn("tuner access failed!\n");
		if (fe->ops.analog_ops.i2c_gate_ctrl)
			fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
		return -EREMOTEIO;
	}

	if ((data == 0x83) || (data == 0x84)) {
		priv->ver |= TDA18271;
		tda829x_tda18271_config.config = priv->cfg.config;
		tda829x_tda18271_config.std_map = priv->tda18271_std_map;
		dvb_attach(tda18271_attach, fe, priv->tda827x_addr,
			   priv->i2c_props.adap, &tda829x_tda18271_config);
	} else {
		if ((data & 0x3c) == 0)
			priv->ver |= TDA8275;
		else
			priv->ver |= TDA8275A;

		dvb_attach(tda827x_attach, fe, priv->tda827x_addr,
			   priv->i2c_props.adap, &priv->cfg);
		priv->cfg.switch_addr = priv->i2c_props.addr;
	}
	if (fe->ops.tuner_ops.init)
		fe->ops.tuner_ops.init(fe);

	if (fe->ops.tuner_ops.sleep)
		fe->ops.tuner_ops.sleep(fe);

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

	return 0;
}

static int tda8290_probe(struct tuner_i2c_props *i2c_props)
{
#define TDA8290_ID 0x89
	u8 reg = 0x1f, id;
	struct i2c_msg msg_read[] = {
		{ .addr = i2c_props->addr, .flags = 0, .len = 1, .buf = &reg },
		{ .addr = i2c_props->addr, .flags = I2C_M_RD, .len = 1, .buf = &id },
	};

	/* detect tda8290 */
	if (i2c_transfer(i2c_props->adap, msg_read, 2) != 2) {
		printk(KERN_WARNING "%s: couldn't read register 0x%02x\n",
			       __func__, reg);
		return -ENODEV;
	}

	if (id == TDA8290_ID) {
		if (debug)
			printk(KERN_DEBUG "%s: tda8290 detected @ %d-%04x\n",
			       __func__, i2c_adapter_id(i2c_props->adap),
			       i2c_props->addr);
		return 0;
	}
	return -ENODEV;
}

static int tda8295_probe(struct tuner_i2c_props *i2c_props)
{
#define TDA8295_ID 0x8a
#define TDA8295C2_ID 0x8b
	u8 reg = 0x2f, id;
	struct i2c_msg msg_read[] = {
		{ .addr = i2c_props->addr, .flags = 0, .len = 1, .buf = &reg },
		{ .addr = i2c_props->addr, .flags = I2C_M_RD, .len = 1, .buf = &id },
	};

	/* detect tda8295 */
	if (i2c_transfer(i2c_props->adap, msg_read, 2) != 2) {
		printk(KERN_WARNING "%s: couldn't read register 0x%02x\n",
			       __func__, reg);
		return -ENODEV;
	}

	if ((id & 0xfe) == TDA8295_ID) {
		if (debug)
			printk(KERN_DEBUG "%s: %s detected @ %d-%04x\n",
			       __func__, (id == TDA8295_ID) ?
			       "tda8295c1" : "tda8295c2",
			       i2c_adapter_id(i2c_props->adap),
			       i2c_props->addr);
		return 0;
	}

	return -ENODEV;
}

static struct analog_demod_ops tda8290_ops = {
	.set_params     = tda8290_set_params,
	.has_signal     = tda8290_has_signal,
	.standby        = tda8290_standby,
	.release        = tda829x_release,
	.i2c_gate_ctrl  = tda8290_i2c_bridge,
};

static struct analog_demod_ops tda8295_ops = {
	.set_params     = tda8295_set_params,
	.has_signal     = tda8295_has_signal,
	.standby        = tda8295_standby,
	.release        = tda829x_release,
	.i2c_gate_ctrl  = tda8295_i2c_bridge,
};

struct dvb_frontend *tda829x_attach(struct dvb_frontend *fe,
				    struct i2c_adapter *i2c_adap, u8 i2c_addr,
				    struct tda829x_config *cfg)
{
	struct tda8290_priv *priv = NULL;
	char *name;

	priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;
	fe->analog_demod_priv = priv;

	priv->i2c_props.addr     = i2c_addr;
	priv->i2c_props.adap     = i2c_adap;
	priv->i2c_props.name     = "tda829x";
	if (cfg) {
		priv->cfg.config = cfg->lna_cfg;
		priv->tda18271_std_map = cfg->tda18271_std_map;
	}

	if (tda8290_probe(&priv->i2c_props) == 0) {
		priv->ver = TDA8290;
		memcpy(&fe->ops.analog_ops, &tda8290_ops,
		       sizeof(struct analog_demod_ops));
	}

	if (tda8295_probe(&priv->i2c_props) == 0) {
		priv->ver = TDA8295;
		memcpy(&fe->ops.analog_ops, &tda8295_ops,
		       sizeof(struct analog_demod_ops));
	}

	if (cfg && cfg->no_i2c_gate)
		fe->ops.analog_ops.i2c_gate_ctrl = NULL;

	if (!(cfg) || (TDA829X_PROBE_TUNER == cfg->probe_tuner)) {
		tda8295_power(fe, 1);
		if (tda829x_find_tuner(fe) < 0)
			goto fail;
	}

	switch (priv->ver) {
	case TDA8290:
		name = "tda8290";
		break;
	case TDA8295:
		name = "tda8295";
		break;
	case TDA8290 | TDA8275:
		name = "tda8290+75";
		break;
	case TDA8295 | TDA8275:
		name = "tda8295+75";
		break;
	case TDA8290 | TDA8275A:
		name = "tda8290+75a";
		break;
	case TDA8295 | TDA8275A:
		name = "tda8295+75a";
		break;
	case TDA8290 | TDA18271:
		name = "tda8290+18271";
		break;
	case TDA8295 | TDA18271:
		name = "tda8295+18271";
		break;
	default:
		goto fail;
	}
	tuner_info("type set to %s\n", name);

	fe->ops.analog_ops.info.name = name;

	if (priv->ver & TDA8290) {
		if (priv->ver & (TDA8275 | TDA8275A))
			tda8290_init_tuner(fe);
		tda8290_init_if(fe);
	} else if (priv->ver & TDA8295)
		tda8295_init_if(fe);

	return fe;

fail:
	memset(&fe->ops.analog_ops, 0, sizeof(struct analog_demod_ops));

	tda829x_release(fe);
	return NULL;
}
EXPORT_SYMBOL_GPL(tda829x_attach);

int tda829x_probe(struct i2c_adapter *i2c_adap, u8 i2c_addr)
{
	struct tuner_i2c_props i2c_props = {
		.adap = i2c_adap,
		.addr = i2c_addr,
	};

	unsigned char soft_reset[]   = { 0x00, 0x00 };
	unsigned char easy_mode_b[]  = { 0x01, 0x02 };
	unsigned char easy_mode_g[]  = { 0x01, 0x04 };
	unsigned char restore_9886[] = { 0x00, 0xd6, 0x30 };
	unsigned char addr_dto_lsb = 0x07;
	unsigned char data;
#define PROBE_BUFFER_SIZE 8
	unsigned char buf[PROBE_BUFFER_SIZE];
	int i;

	/* rule out tda9887, which would return the same byte repeatedly */
	tuner_i2c_xfer_send_recv(&i2c_props,
				 soft_reset, 1, buf, PROBE_BUFFER_SIZE);
	for (i = 1; i < PROBE_BUFFER_SIZE; i++) {
		if (buf[i] != buf[0])
			break;
	}

	/* all bytes are equal, not a tda829x - probably a tda9887 */
	if (i == PROBE_BUFFER_SIZE)
		return -ENODEV;

	if ((tda8290_probe(&i2c_props) == 0) ||
	    (tda8295_probe(&i2c_props) == 0))
		return 0;

	/* fall back to old probing method */
	tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 2);
	tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
	tuner_i2c_xfer_send_recv(&i2c_props, &addr_dto_lsb, 1, &data, 1);
	if (data == 0) {
		tuner_i2c_xfer_send(&i2c_props, easy_mode_g, 2);
		tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
		tuner_i2c_xfer_send_recv(&i2c_props,
					 &addr_dto_lsb, 1, &data, 1);
		if (data == 0x7b) {
			return 0;
		}
	}
	tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
	return -ENODEV;
}
EXPORT_SYMBOL_GPL(tda829x_probe);

MODULE_DESCRIPTION("Philips/NXP TDA8290/TDA8295 analog IF demodulator driver");
MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann, Michael Krufky");
MODULE_LICENSE("GPL");