2 * 1. Redistributions of source code must retain the
3 * Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Amancio Hasty and
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
29 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
30 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
33 * $FreeBSD: src/sys/dev/bktr/bktr_tuner.c,v 1.12 2003/12/08 07:59:18 obrien Exp $
34 * $DragonFly: src/sys/dev/video/bktr/bktr_tuner.c,v 1.6 2004/05/15 17:54:13 joerg Exp $
39 * This is part of the Driver for Video Capture Cards (Frame grabbers)
40 * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
42 * Copyright Roger Hardiman and Amancio Hasty.
44 * bktr_tuner : This deals with controlling the tuner fitted to TV cards.
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/kernel.h>
50 #include <sys/vnode.h>
52 #include <bus/pci/pcivar.h>
54 #include <machine/bus_memio.h> /* for bus space */
55 #include <machine/bus.h>
58 #include <dev/video/meteor/ioctl_meteor.h>
59 #include <dev/video/bktr/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
60 #include <dev/video/bktr/bktr_reg.h>
61 #include <dev/video/bktr/bktr_tuner.h>
62 #include <dev/video/bktr/bktr_card.h>
63 #include <dev/video/bktr/bktr_core.h>
67 #if defined( TUNER_AFC )
68 #define AFC_DELAY 10000 /* 10 millisend delay */
70 #define AFC_FREQ_MINUS_125 0x00
71 #define AFC_FREQ_MINUS_62 0x01
72 #define AFC_FREQ_CENTERED 0x02
73 #define AFC_FREQ_PLUS_62 0x03
74 #define AFC_FREQ_PLUS_125 0x04
75 #define AFC_MAX_STEP (5 * FREQFACTOR) /* no more than 5 MHz */
76 #endif /* TUNER_AFC */
81 #define TTYPE_NTSC_J 2
87 #define TSA552x_CB_MSB (0x80)
88 #define TSA552x_CB_CP (1<<6) /* set this for fast tuning */
89 #define TSA552x_CB_T2 (1<<5) /* test mode - Normally set to 0 */
90 #define TSA552x_CB_T1 (1<<4) /* test mode - Normally set to 0 */
91 #define TSA552x_CB_T0 (1<<3) /* test mode - Normally set to 1 */
92 #define TSA552x_CB_RSA (1<<2) /* 0 for 31.25 khz, 1 for 62.5 kHz */
93 #define TSA552x_CB_RSB (1<<1) /* 0 for FM 50kHz steps, 1 = Use RSA*/
94 #define TSA552x_CB_OS (1<<0) /* Set to 0 for normal operation */
96 #define TSA552x_RADIO (TSA552x_CB_MSB | \
99 /* raise the charge pump voltage for fast tuning */
100 #define TSA552x_FCONTROL (TSA552x_CB_MSB | \
106 /* lower the charge pump voltage for better residual oscillator FM */
107 #define TSA552x_SCONTROL (TSA552x_CB_MSB | \
112 /* The control value for the ALPS TSCH5 Tuner */
113 #define TSCH5_FCONTROL 0x82
114 #define TSCH5_RADIO 0x86
116 /* The control value for the ALPS TSBH1 Tuner */
117 #define TSBH1_FCONTROL 0xce
120 static const struct TUNER tuners[] = {
121 /* XXX FIXME: fill in the band-switch crosspoints */
123 { "<no>", /* the 'name' */
124 TTYPE_XXX, /* input type */
125 { 0x00, /* control byte for Tuner PLL */
129 { 0x00, 0x00 }, /* band-switch crosspoints */
130 { 0x00, 0x00, 0x00,0x00} }, /* the band-switch values */
133 { "Temic NTSC", /* the 'name' */
134 TTYPE_NTSC, /* input type */
135 { TSA552x_SCONTROL, /* control byte for Tuner PLL */
139 { 0x00, 0x00}, /* band-switch crosspoints */
140 { 0x02, 0x04, 0x01, 0x00 } }, /* the band-switch values */
143 { "Temic PAL", /* the 'name' */
144 TTYPE_PAL, /* input type */
145 { TSA552x_SCONTROL, /* control byte for Tuner PLL */
149 { 0x00, 0x00 }, /* band-switch crosspoints */
150 { 0x02, 0x04, 0x01, 0x00 } }, /* the band-switch values */
153 { "Temic SECAM", /* the 'name' */
154 TTYPE_SECAM, /* input type */
155 { TSA552x_SCONTROL, /* control byte for Tuner PLL */
159 { 0x00, 0x00 }, /* band-switch crosspoints */
160 { 0x02, 0x04, 0x01,0x00 } }, /* the band-switch values */
163 { "Philips NTSC", /* the 'name' */
164 TTYPE_NTSC, /* input type */
165 { TSA552x_SCONTROL, /* control byte for Tuner PLL */
169 { 0x00, 0x00 }, /* band-switch crosspoints */
170 { 0xa0, 0x90, 0x30, 0x00 } }, /* the band-switch values */
173 { "Philips PAL", /* the 'name' */
174 TTYPE_PAL, /* input type */
175 { TSA552x_SCONTROL, /* control byte for Tuner PLL */
179 { 0x00, 0x00 }, /* band-switch crosspoints */
180 { 0xa0, 0x90, 0x30, 0x00 } }, /* the band-switch values */
183 { "Philips SECAM", /* the 'name' */
184 TTYPE_SECAM, /* input type */
185 { TSA552x_SCONTROL, /* control byte for Tuner PLL */
189 { 0x00, 0x00 }, /* band-switch crosspoints */
190 { 0xa7, 0x97, 0x37, 0x00 } }, /* the band-switch values */
193 { "Temic PAL I", /* the 'name' */
194 TTYPE_PAL, /* input type */
195 { TSA552x_SCONTROL, /* control byte for Tuner PLL */
199 { 0x00, 0x00 }, /* band-switch crosspoints */
200 { 0x02, 0x04, 0x01,0x00 } }, /* the band-switch values */
203 { "Philips PAL I", /* the 'name' */
204 TTYPE_PAL, /* input type */
205 { TSA552x_SCONTROL, /* control byte for Tuner PLL */
209 { 0x00, 0x00 }, /* band-switch crosspoints */
210 { 0xa0, 0x90, 0x30,0x00 } }, /* the band-switch values */
212 /* PHILIPS_FR1236_NTSC */
213 { "Philips FR1236 NTSC FM", /* the 'name' */
214 TTYPE_NTSC, /* input type */
215 { TSA552x_FCONTROL, /* control byte for Tuner PLL */
219 { 0x00, 0x00 }, /* band-switch crosspoints */
220 { 0xa0, 0x90, 0x30,0xa4 } }, /* the band-switch values */
222 /* PHILIPS_FR1216_PAL */
223 { "Philips FR1216 PAL FM" , /* the 'name' */
224 TTYPE_PAL, /* input type */
225 { TSA552x_FCONTROL, /* control byte for Tuner PLL */
229 { 0x00, 0x00 }, /* band-switch crosspoints */
230 { 0xa0, 0x90, 0x30, 0xa4 } }, /* the band-switch values */
232 /* PHILIPS_FR1236_SECAM */
233 { "Philips FR1236 SECAM FM", /* the 'name' */
234 TTYPE_SECAM, /* input type */
235 { TSA552x_FCONTROL, /* control byte for Tuner PLL */
239 { 0x00, 0x00 }, /* band-switch crosspoints */
240 { 0xa7, 0x97, 0x37, 0xa4 } }, /* the band-switch values */
242 /* ALPS TSCH5 NTSC */
243 { "ALPS TSCH5 NTSC FM", /* the 'name' */
244 TTYPE_NTSC, /* input type */
245 { TSCH5_FCONTROL, /* control byte for Tuner PLL */
249 { 0x00, 0x00 }, /* band-switch crosspoints */
250 { 0x14, 0x12, 0x11, 0x04 } }, /* the band-switch values */
252 /* ALPS TSBH1 NTSC */
253 { "ALPS TSBH1 NTSC", /* the 'name' */
254 TTYPE_NTSC, /* input type */
255 { TSBH1_FCONTROL, /* control byte for Tuner PLL */
259 { 0x00, 0x00 }, /* band-switch crosspoints */
260 { 0x01, 0x02, 0x08, 0x00 } } /* the band-switch values */
264 /* scaling factor for frequencies expressed as ints */
265 #define FREQFACTOR 16
269 * entry 0: MAX legal channel
270 * entry 1: IF frequency
271 * expressed as fi{mHz} * 16,
272 * eg 45.75mHz == 45.75 * 16 = 732
273 * entry 2: [place holder/future]
274 * entry 3: base of channel record 0
275 * entry 3 + (x*3): base of channel record 'x'
276 * entry LAST: NULL channel entry marking end of records
279 * int 0: base channel
280 * int 1: frequency of base channel,
281 * expressed as fb{mHz} * 16,
282 * int 2: offset frequency between channels,
283 * expressed as fo{mHz} * 16,
287 * North American Broadcast Channels:
289 * 2: 55.25 mHz - 4: 67.25 mHz
290 * 5: 77.25 mHz - 6: 83.25 mHz
291 * 7: 175.25 mHz - 13: 211.25 mHz
292 * 14: 471.25 mHz - 83: 885.25 mHz
297 static int nabcst[] = {
298 83, (int)( 45.75 * FREQFACTOR), 0,
299 14, (int)(471.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
300 7, (int)(175.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
301 5, (int)( 77.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
302 2, (int)( 55.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
308 * North American Cable Channels, IRC:
310 * 2: 55.25 mHz - 4: 67.25 mHz
311 * 5: 77.25 mHz - 6: 83.25 mHz
312 * 7: 175.25 mHz - 13: 211.25 mHz
313 * 14: 121.25 mHz - 22: 169.25 mHz
314 * 23: 217.25 mHz - 94: 643.25 mHz
315 * 95: 91.25 mHz - 99: 115.25 mHz
320 static int irccable[] = {
321 116, (int)( 45.75 * FREQFACTOR), 0,
322 100, (int)(649.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
323 95, (int)( 91.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
324 23, (int)(217.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
325 14, (int)(121.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
326 7, (int)(175.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
327 5, (int)( 77.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
328 2, (int)( 55.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
334 * North American Cable Channels, HRC:
336 * 2: 54 mHz - 4: 66 mHz
337 * 5: 78 mHz - 6: 84 mHz
338 * 7: 174 mHz - 13: 210 mHz
339 * 14: 120 mHz - 22: 168 mHz
340 * 23: 216 mHz - 94: 642 mHz
341 * 95: 90 mHz - 99: 114 mHz
346 static int hrccable[] = {
347 116, (int)( 45.75 * FREQFACTOR), 0,
348 100, (int)(648.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
349 95, (int)( 90.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
350 23, (int)(216.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
351 14, (int)(120.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
352 7, (int)(174.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
353 5, (int)( 78.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
354 2, (int)( 54.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
360 * Western European broadcast channels:
362 * (there are others that appear to vary between countries - rmt)
364 * here's the table Philips provides:
365 * caution, some of the offsets don't compute...
474 * Channels S21 - S41 are taken from
475 * http://gemma.apple.com:80/dev/technotes/tn/tn1012.html
499 * 121 3890 000 IFFREQ
502 static int weurope[] = {
503 121, (int)( 38.90 * FREQFACTOR), 0,
504 100, (int)(303.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR),
505 90, (int)(231.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR),
506 80, (int)(105.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR),
507 74, (int)( 69.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR),
508 21, (int)(471.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR),
509 17, (int)(183.25 * FREQFACTOR), (int)(9.00 * FREQFACTOR),
510 16, (int)(175.25 * FREQFACTOR), (int)(9.00 * FREQFACTOR),
511 15, (int)(82.25 * FREQFACTOR), (int)(8.50 * FREQFACTOR),
512 13, (int)(53.75 * FREQFACTOR), (int)(8.50 * FREQFACTOR),
513 5, (int)(175.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR),
514 2, (int)(48.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR),
519 * Japanese Broadcast Channels:
521 * 1: 91.25MHz - 3: 103.25MHz
522 * 4: 171.25MHz - 7: 189.25MHz
523 * 8: 193.25MHz - 12: 217.25MHz (VHF)
524 * 13: 471.25MHz - 62: 765.25MHz (UHF)
531 #define IF_FREQ 45.75
532 static int jpnbcst[] = {
533 62, (int)(IF_FREQ * FREQFACTOR), 0,
534 13, (int)(471.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
535 8, (int)(193.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
536 4, (int)(171.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
537 1, (int)( 91.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
544 * Japanese Cable Channels:
546 * 1: 91.25MHz - 3: 103.25MHz
547 * 4: 171.25MHz - 7: 189.25MHz
548 * 8: 193.25MHz - 12: 217.25MHz
549 * 13: 109.25MHz - 21: 157.25MHz
551 * 23: 223.25MHz - 63: 463.25MHz
556 #define IF_FREQ 45.75
557 static int jpncable[] = {
558 63, (int)(IF_FREQ * FREQFACTOR), 0,
559 23, (int)(223.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
560 22, (int)(165.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
561 13, (int)(109.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
562 8, (int)(193.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
563 4, (int)(171.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
564 1, (int)( 91.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
571 * xUSSR Broadcast Channels:
573 * 1: 49.75MHz - 2: 59.25MHz
574 * 3: 77.25MHz - 5: 93.25MHz
575 * 6: 175.25MHz - 12: 223.25MHz
577 * 21: 471.25MHz - 34: 575.25MHz
578 * 35: 583.25MHz - 69: 855.25MHz
582 * 70: 111.25MHz - 77: 167.25MHz
583 * 78: 231.25MHz -107: 463.25MHz
587 #define IF_FREQ 38.90
588 static int xussr[] = {
589 107, (int)(IF_FREQ * FREQFACTOR), 0,
590 78, (int)(231.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR),
591 70, (int)(111.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR),
592 35, (int)(583.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR),
593 21, (int)(471.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR),
594 6, (int)(175.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR),
595 3, (int)( 77.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR),
596 1, (int)( 49.75 * FREQFACTOR), (int)(9.50 * FREQFACTOR),
602 * Australian broadcast channels
605 #define IF_FREQ 38.90
606 static int australia[] = {
607 83, (int)(IF_FREQ * FREQFACTOR), 0,
608 28, (int)(527.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
609 10, (int)(209.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
610 6, (int)(175.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
611 4, (int)( 95.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
612 3, (int)( 86.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
613 1, (int)( 57.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR),
620 * France broadcast channels
623 #define IF_FREQ 38.90
624 static int france[] = {
625 69, (int)(IF_FREQ * FREQFACTOR), 0,
626 21, (int)(471.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 21 -> 69 */
627 5, (int)(176.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 5 -> 10 */
628 4, (int)( 63.75 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 4 */
629 3, (int)( 60.50 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 3 */
630 1, (int)( 47.75 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 1 2 */
638 char name[BT848_MAX_CHNLSET_NAME_LEN];
642 {irccable, "cableirc"},
643 {hrccable, "cablehrc"},
644 {weurope, "weurope"},
645 {jpnbcst, "jpnbcst"},
646 {jpncable, "jpncable"},
648 {australia, "australia"},
653 #define TBL_CHNL freqTable[ bktr->tuner.chnlset ].ptr[ x ]
654 #define TBL_BASE_FREQ freqTable[ bktr->tuner.chnlset ].ptr[ x + 1 ]
655 #define TBL_OFFSET freqTable[ bktr->tuner.chnlset ].ptr[ x + 2 ]
657 frequency_lookup( bktr_ptr_t bktr, int channel )
661 /* check for "> MAX channel" */
663 if ( channel > TBL_CHNL )
666 /* search the table for data */
667 for ( x = 3; TBL_CHNL; x += 3 ) {
668 if ( channel >= TBL_CHNL ) {
669 return( TBL_BASE_FREQ +
670 ((channel - TBL_CHNL) * TBL_OFFSET) );
674 /* not found, must be below the MIN channel */
682 #define TBL_IF freqTable[ bktr->tuner.chnlset ].ptr[ 1 ]
685 /* Initialise the tuner structures in the bktr_softc */
686 /* This is needed as the tuner details are no longer globally declared */
688 void select_tuner( bktr_ptr_t bktr, int tuner_type ) {
689 if (tuner_type < Bt848_MAX_TUNER) {
690 bktr->card.tuner = &tuners[ tuner_type ];
692 bktr->card.tuner = NULL;
698 * Programming the tuner properly is quite complicated.
699 * Here are some notes, based on a FM1246 data sheet for a PAL-I tuner.
700 * The tuner (front end) covers 45.75 Mhz - 855.25 Mhz and an FM band of
701 * 87.5 Mhz to 108.0 Mhz.
703 * RF and IF. RF = radio frequencies, it is the transmitted signal.
704 * IF is the Intermediate Frequency (the offset from the base
705 * signal where the video, color, audio and NICAM signals are.
707 * Eg, Picture at 38.9 Mhz, Colour at 34.47 MHz, sound at 32.9 MHz
708 * NICAM at 32.348 Mhz.
709 * Strangely enough, there is an IF (intermediate frequency) for
710 * FM Radio which is 10.7 Mhz.
712 * The tuner also works in Bands. Philips bands are
713 * FM radio band 87.50 to 108.00 MHz
714 * Low band 45.75 to 170.00 MHz
715 * Mid band 170.00 to 450.00 MHz
716 * High band 450.00 to 855.25 MHz
719 * Now we need to set the PLL on the tuner to the required freuqncy.
720 * It has a programmable divisor.
722 * N = 16 (freq RF(pc) + freq IF(pc)) pc is picture carrier and RF and IF
725 * For RADIO we want a different equation.
726 * freq IF is 10.70 MHz (so the data sheet tells me)
727 * N = (freq RF + freq IF) / step size
728 * The step size must be set to 50 khz (so the data sheet tells me)
729 * (note this is 50 kHz, the other things are in MHz)
730 * so we end up with N = 20x(freq RF + 10.7)
737 #define FM_RADIO_BAND 3
740 /* Check if these are correct for other than Philips PAL */
741 #define STATUSBIT_COLD 0x80
742 #define STATUSBIT_LOCK 0x40
743 #define STATUSBIT_TV 0x20
744 #define STATUSBIT_STEREO 0x10 /* valid if FM (aka not TV) */
745 #define STATUSBIT_ADC 0x07
748 * set the frequency of the tuner
749 * If 'type' is TV_FREQUENCY, the frequency is freq MHz*16
750 * If 'type' is FM_RADIO_FREQUENCY, the frequency is freq MHz * 100
751 * (note *16 gives is 4 bits of fraction, eg steps of nnn.0625)
755 tv_freq( bktr_ptr_t bktr, int frequency, int type )
757 const struct TUNER* tuner;
763 #if defined( TEST_TUNER_AFC )
764 int oldFrequency, afcDelta;
767 tuner = bktr->card.tuner;
771 if (type == TV_FREQUENCY) {
773 * select the band based on frequency
774 * XXX FIXME: get the cross-over points from the tuner struct
776 if ( frequency < (160 * FREQFACTOR ) )
777 band_select = LOW_BAND;
778 else if ( frequency < (454 * FREQFACTOR ) )
779 band_select = MID_BAND;
781 band_select = HIGH_BAND;
783 #if defined( TEST_TUNER_AFC )
784 if ( bktr->tuner.afc )
788 * N = 16 * { fRF(pc) + fIF(pc) }
789 * or N = 16* fRF(pc) + 16*fIF(pc) }
791 * pc is picture carrier, fRF & fIF are in MHz
793 * fortunatly, frequency is passed in as MHz * 16
794 * and the TBL_IF frequency is also stored in MHz * 16
796 N = frequency + TBL_IF;
798 /* set the address of the PLL */
799 addr = bktr->card.tuner_pllAddr;
800 control = tuner->pllControl[ band_select ];
801 band = tuner->bandAddrs[ band_select ];
803 if(!(band && control)) /* Don't try to set un- */
804 return(-1); /* supported modes. */
806 if ( frequency > bktr->tuner.frequency ) {
807 i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff );
808 i2cWrite( bktr, addr, control, band );
811 i2cWrite( bktr, addr, control, band );
812 i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff );
815 #if defined( TUNER_AFC )
816 if ( bktr->tuner.afc == TRUE ) {
817 #if defined( TEST_TUNER_AFC )
818 oldFrequency = frequency;
820 if ( (N = do_afc( bktr, addr, N )) < 0 ) {
821 /* AFC failed, restore requested frequency */
822 N = frequency + TBL_IF;
823 #if defined( TEST_TUNER_AFC )
824 printf("%s: do_afc: failed to lock\n",
827 i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff );
830 frequency = N - TBL_IF;
831 #if defined( TEST_TUNER_AFC )
832 printf("%s: do_afc: returned freq %d (%d %% %d)\n", bktr_name(bktr), frequency, frequency / 16, frequency % 16);
833 afcDelta = frequency - oldFrequency;
834 printf("%s: changed by: %d clicks (%d mod %d)\n", bktr_name(bktr), afcDelta, afcDelta / 16, afcDelta % 16);
837 #endif /* TUNER_AFC */
839 bktr->tuner.frequency = frequency;
842 if ( type == FM_RADIO_FREQUENCY ) {
843 band_select = FM_RADIO_BAND;
846 * N = { fRF(pc) + fIF(pc) }/step_size
847 * The step size is 50kHz for FM radio.
848 * (eg after 102.35MHz comes 102.40 MHz)
849 * fIF is 10.7 MHz (as detailed in the specs)
851 * frequency is passed in as MHz * 100
853 * So, we have N = (frequency/100 + 10.70) /(50/1000)
855 N = (frequency + 1070)/5;
857 /* set the address of the PLL */
858 addr = bktr->card.tuner_pllAddr;
859 control = tuner->pllControl[ band_select ];
860 band = tuner->bandAddrs[ band_select ];
862 if(!(band && control)) /* Don't try to set un- */
863 return(-1); /* supported modes. */
865 band |= bktr->tuner.radio_mode; /* tuner.radio_mode is set in
866 * the ioctls RADIO_SETMODE
867 * and RADIO_GETMODE */
869 i2cWrite( bktr, addr, control, band );
870 i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff );
872 bktr->tuner.frequency = (N * 5) - 1070;
883 #if defined( TUNER_AFC )
888 do_afc( bktr_ptr_t bktr, int addr, int frequency )
894 origFrequency = frequency;
896 /* wait for first setting to take effect */
897 tsleep( BKTR_SLEEP, 0, "tuning", hz/8 );
899 if ( (status = i2cRead( bktr, addr + 1 )) < 0 )
902 #if defined( TEST_TUNER_AFC )
903 printf( "%s: Original freq: %d, status: 0x%02x\n", bktr_name(bktr), frequency, status );
905 for ( step = 0; step < AFC_MAX_STEP; ++step ) {
906 if ( (status = i2cRead( bktr, addr + 1 )) < 0 )
908 if ( !(status & 0x40) ) {
909 #if defined( TEST_TUNER_AFC )
910 printf( "%s: no lock!\n", bktr_name(bktr) );
915 switch( status & AFC_BITS ) {
916 case AFC_FREQ_CENTERED:
917 #if defined( TEST_TUNER_AFC )
918 printf( "%s: Centered, freq: %d, status: 0x%02x\n", bktr_name(bktr), frequency, status );
922 case AFC_FREQ_MINUS_125:
923 case AFC_FREQ_MINUS_62:
924 #if defined( TEST_TUNER_AFC )
925 printf( "%s: Low, freq: %d, status: 0x%02x\n", bktr_name(bktr), frequency, status );
930 case AFC_FREQ_PLUS_62:
931 case AFC_FREQ_PLUS_125:
932 #if defined( TEST_TUNER_AFC )
933 printf( "%s: Hi, freq: %d, status: 0x%02x\n", bktr_name(bktr), frequency, status );
939 i2cWrite( bktr, addr,
940 (frequency>>8) & 0x7f, frequency & 0xff );
945 i2cWrite( bktr, addr,
946 (origFrequency>>8) & 0x7f, origFrequency & 0xff );
950 #endif /* TUNER_AFC */
955 * Get the Tuner status and signal strength
957 int get_tuner_status( bktr_ptr_t bktr ) {
958 return i2cRead( bktr, bktr->card.tuner_pllAddr + 1 );
962 * set the channel of the tuner
965 tv_channel( bktr_ptr_t bktr, int channel )
969 /* calculate the frequency according to tuner type */
970 if ( (frequency = frequency_lookup( bktr, channel )) < 0 )
973 /* set the new frequency */
974 if ( tv_freq( bktr, frequency, TV_FREQUENCY ) < 0 )
977 /* OK to update records */
978 return( (bktr->tuner.channel = channel) );
982 * get channelset name
985 tuner_getchnlset(struct bktr_chnlset *chnlset)
987 if (( chnlset->index < CHNLSET_MIN ) ||
988 ( chnlset->index > CHNLSET_MAX ))
991 memcpy(&chnlset->name, &freqTable[chnlset->index].name,
992 BT848_MAX_CHNLSET_NAME_LEN);
994 chnlset->max_channel=freqTable[chnlset->index].ptr[0];