/* $OpenBSD: bktr_tuner.c,v 1.9 2020/01/11 08:24:08 cheloha Exp $ */ /* $FreeBSD: src/sys/dev/bktr/bktr_tuner.c,v 1.9 2000/10/19 07:33:28 roger Exp $ */ /* * This is part of the Driver for Video Capture Cards (Frame grabbers) * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879 * chipset. * Copyright Roger Hardiman and Amancio Hasty. * * bktr_tuner : This deals with controlling the tuner fitted to TV cards. * */ /* * 1. Redistributions of source code must retain the * Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Amancio Hasty and * Roger Hardiman * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include /* OpenBSD .h file location */ #include #include #include #if defined( TUNER_AFC ) #define AFC_DELAY 10000 /* 10 millisend delay */ #define AFC_BITS 0x07 #define AFC_FREQ_MINUS_125 0x00 #define AFC_FREQ_MINUS_62 0x01 #define AFC_FREQ_CENTERED 0x02 #define AFC_FREQ_PLUS_62 0x03 #define AFC_FREQ_PLUS_125 0x04 #define AFC_MAX_STEP (5 * FREQFACTOR) /* no more than 5 MHz */ #endif /* TUNER_AFC */ #define TTYPE_XXX 0 #define TTYPE_NTSC 1 #define TTYPE_NTSC_J 2 #define TTYPE_PAL 3 #define TTYPE_PAL_M 4 #define TTYPE_PAL_N 5 #define TTYPE_SECAM 6 #define TSA552x_CB_MSB (0x80) #define TSA552x_CB_CP (1<<6) /* set this for fast tuning */ #define TSA552x_CB_T2 (1<<5) /* test mode - Normally set to 0 */ #define TSA552x_CB_T1 (1<<4) /* test mode - Normally set to 0 */ #define TSA552x_CB_T0 (1<<3) /* test mode - Normally set to 1 */ #define TSA552x_CB_RSA (1<<2) /* 0 for 31.25 khz, 1 for 62.5 kHz */ #define TSA552x_CB_RSB (1<<1) /* 0 for FM 50kHz steps, 1 = Use RSA*/ #define TSA552x_CB_OS (1<<0) /* Set to 0 for normal operation */ #define TSA552x_RADIO (TSA552x_CB_MSB | \ TSA552x_CB_T0) /* raise the charge pump voltage for fast tuning */ #define TSA552x_FCONTROL (TSA552x_CB_MSB | \ TSA552x_CB_CP | \ TSA552x_CB_T0 | \ TSA552x_CB_RSA | \ TSA552x_CB_RSB) /* lower the charge pump voltage for better residual oscillator FM */ #define TSA552x_SCONTROL (TSA552x_CB_MSB | \ TSA552x_CB_T0 | \ TSA552x_CB_RSA | \ TSA552x_CB_RSB) /* The control value for the ALPS TSCH5 Tuner */ #define TSCH5_FCONTROL 0x82 #define TSCH5_RADIO 0x86 /* The control value for the ALPS TSBH1 Tuner */ #define TSBH1_FCONTROL 0xce static const struct TUNER tuners[] = { /* XXX FIXME: fill in the band-switch crosspoints */ /* NO_TUNER */ { "", /* the 'name' */ TTYPE_XXX, /* input type */ { 0x00, /* control byte for Tuner PLL */ 0x00, 0x00, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0x00, 0x00, 0x00,0x00} }, /* the band-switch values */ /* TEMIC_NTSC */ { "Temic NTSC", /* the 'name' */ TTYPE_NTSC, /* input type */ { TSA552x_SCONTROL, /* control byte for Tuner PLL */ TSA552x_SCONTROL, TSA552x_SCONTROL, 0x00 }, { 0x00, 0x00}, /* band-switch crosspoints */ { 0x02, 0x04, 0x01, 0x00 } }, /* the band-switch values */ /* TEMIC_PAL */ { "Temic PAL", /* the 'name' */ TTYPE_PAL, /* input type */ { TSA552x_SCONTROL, /* control byte for Tuner PLL */ TSA552x_SCONTROL, TSA552x_SCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0x02, 0x04, 0x01, 0x00 } }, /* the band-switch values */ /* TEMIC_SECAM */ { "Temic SECAM", /* the 'name' */ TTYPE_SECAM, /* input type */ { TSA552x_SCONTROL, /* control byte for Tuner PLL */ TSA552x_SCONTROL, TSA552x_SCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0x02, 0x04, 0x01,0x00 } }, /* the band-switch values */ /* PHILIPS_NTSC */ { "Philips NTSC", /* the 'name' */ TTYPE_NTSC, /* input type */ { TSA552x_SCONTROL, /* control byte for Tuner PLL */ TSA552x_SCONTROL, TSA552x_SCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0xa0, 0x90, 0x30, 0x00 } }, /* the band-switch values */ /* PHILIPS_PAL */ { "Philips PAL", /* the 'name' */ TTYPE_PAL, /* input type */ { TSA552x_SCONTROL, /* control byte for Tuner PLL */ TSA552x_SCONTROL, TSA552x_SCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0xa0, 0x90, 0x30, 0x00 } }, /* the band-switch values */ /* PHILIPS_SECAM */ { "Philips SECAM", /* the 'name' */ TTYPE_SECAM, /* input type */ { TSA552x_SCONTROL, /* control byte for Tuner PLL */ TSA552x_SCONTROL, TSA552x_SCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0xa7, 0x97, 0x37, 0x00 } }, /* the band-switch values */ /* TEMIC_PAL I */ { "Temic PAL I", /* the 'name' */ TTYPE_PAL, /* input type */ { TSA552x_SCONTROL, /* control byte for Tuner PLL */ TSA552x_SCONTROL, TSA552x_SCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0x02, 0x04, 0x01,0x00 } }, /* the band-switch values */ /* PHILIPS_PALI */ { "Philips PAL I", /* the 'name' */ TTYPE_PAL, /* input type */ { TSA552x_SCONTROL, /* control byte for Tuner PLL */ TSA552x_SCONTROL, TSA552x_SCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0xa0, 0x90, 0x30,0x00 } }, /* the band-switch values */ /* PHILIPS_FR1236_NTSC */ { "Philips FR1236 NTSC FM", /* the 'name' */ TTYPE_NTSC, /* input type */ { TSA552x_FCONTROL, /* control byte for Tuner PLL */ TSA552x_FCONTROL, TSA552x_FCONTROL, TSA552x_RADIO }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0xa0, 0x90, 0x30,0xa4 } }, /* the band-switch values */ /* PHILIPS_FR1216_PAL */ { "Philips FR1216 PAL FM" , /* the 'name' */ TTYPE_PAL, /* input type */ { TSA552x_FCONTROL, /* control byte for Tuner PLL */ TSA552x_FCONTROL, TSA552x_FCONTROL, TSA552x_RADIO }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0xa0, 0x90, 0x30, 0xa4 } }, /* the band-switch values */ /* PHILIPS_FR1236_SECAM */ { "Philips FR1236 SECAM FM", /* the 'name' */ TTYPE_SECAM, /* input type */ { TSA552x_FCONTROL, /* control byte for Tuner PLL */ TSA552x_FCONTROL, TSA552x_FCONTROL, TSA552x_RADIO }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0xa7, 0x97, 0x37, 0xa4 } }, /* the band-switch values */ /* ALPS TSCH5 NTSC */ { "ALPS TSCH5 NTSC FM", /* the 'name' */ TTYPE_NTSC, /* input type */ { TSCH5_FCONTROL, /* control byte for Tuner PLL */ TSCH5_FCONTROL, TSCH5_FCONTROL, TSCH5_RADIO }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0x14, 0x12, 0x11, 0x04 } }, /* the band-switch values */ /* ALPS TSBH1 NTSC */ { "ALPS TSBH1 NTSC", /* the 'name' */ TTYPE_NTSC, /* input type */ { TSBH1_FCONTROL, /* control byte for Tuner PLL */ TSBH1_FCONTROL, TSBH1_FCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0x01, 0x02, 0x08, 0x00 } }, /* the band-switch values */ /* Tivision TVF5533-MF NTSC */ { "Tivision TVF5533-MF NTSC", /* the 'name' */ TTYPE_NTSC, /* input 'type' */ { TSBH1_FCONTROL, /* ctr byte for Tuner PLL */ TSBH1_FCONTROL, TSBH1_FCONTROL, 0x00 }, { 0x00, 0x00 }, /* band-switch crosspoints */ { 0x01, 0x02, 0x04, 0x00 } }, /* the band-switch values */ }; /* scaling factor for frequencies expressed as ints */ #define FREQFACTOR 16 /* * Format: * entry 0: MAX legal channel * entry 1: IF frequency * expressed as fi{mHz} * 16, * eg 45.75mHz == 45.75 * 16 = 732 * entry 2: [place holder/future] * entry 3: base of channel record 0 * entry 3 + (x*3): base of channel record 'x' * entry LAST: NULL channel entry marking end of records * * Record: * int 0: base channel * int 1: frequency of base channel, * expressed as fb{mHz} * 16, * int 2: offset frequency between channels, * expressed as fo{mHz} * 16, */ /* * North American Broadcast Channels: * * 2: 55.25 mHz - 4: 67.25 mHz * 5: 77.25 mHz - 6: 83.25 mHz * 7: 175.25 mHz - 13: 211.25 mHz * 14: 471.25 mHz - 83: 885.25 mHz * * IF freq: 45.75 mHz */ #define OFFSET 6.00 static const int nabcst[] = { 83, (int)( 45.75 * FREQFACTOR), 0, 14, (int)(471.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 7, (int)(175.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 5, (int)( 77.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 2, (int)( 55.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 0 }; #undef OFFSET /* * North American Cable Channels, IRC: * * 2: 55.25 mHz - 4: 67.25 mHz * 5: 77.25 mHz - 6: 83.25 mHz * 7: 175.25 mHz - 13: 211.25 mHz * 14: 121.25 mHz - 22: 169.25 mHz * 23: 217.25 mHz - 94: 643.25 mHz * 95: 91.25 mHz - 99: 115.25 mHz * * IF freq: 45.75 mHz */ #define OFFSET 6.00 static const int irccable[] = { 116, (int)( 45.75 * FREQFACTOR), 0, 100, (int)(649.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 95, (int)( 91.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 23, (int)(217.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 14, (int)(121.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 7, (int)(175.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 5, (int)( 77.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 2, (int)( 55.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 0 }; #undef OFFSET /* * North American Cable Channels, HRC: * * 2: 54 mHz - 4: 66 mHz * 5: 78 mHz - 6: 84 mHz * 7: 174 mHz - 13: 210 mHz * 14: 120 mHz - 22: 168 mHz * 23: 216 mHz - 94: 642 mHz * 95: 90 mHz - 99: 114 mHz * * IF freq: 45.75 mHz */ #define OFFSET 6.00 static const int hrccable[] = { 116, (int)( 45.75 * FREQFACTOR), 0, 100, (int)(648.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 95, (int)( 90.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 23, (int)(216.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 14, (int)(120.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 7, (int)(174.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 5, (int)( 78.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 2, (int)( 54.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 0 }; #undef OFFSET /* * Western European broadcast channels: * * (there are others that appear to vary between countries - rmt) * * here's the table Philips provides: * caution, some of the offsets don't compute... * * 1 4525 700 N21 * * 2 4825 700 E2 * 3 5525 700 E3 * 4 6225 700 E4 * * 5 17525 700 E5 * 6 18225 700 E6 * 7 18925 700 E7 * 8 19625 700 E8 * 9 20325 700 E9 * 10 21025 700 E10 * 11 21725 700 E11 * 12 22425 700 E12 * * 13 5375 700 ITA * 14 6225 700 ITB * * 15 8225 700 ITC * * 16 17525 700 ITD * 17 18325 700 ITE * * 18 19225 700 ITF * 19 20125 700 ITG * 20 21025 700 ITH * * 21 47125 800 E21 * 22 47925 800 E22 * 23 48725 800 E23 * 24 49525 800 E24 * 25 50325 800 E25 * 26 51125 800 E26 * 27 51925 800 E27 * 28 52725 800 E28 * 29 53525 800 E29 * 30 54325 800 E30 * 31 55125 800 E31 * 32 55925 800 E32 * 33 56725 800 E33 * 34 57525 800 E34 * 35 58325 800 E35 * 36 59125 800 E36 * 37 59925 800 E37 * 38 60725 800 E38 * 39 61525 800 E39 * 40 62325 800 E40 * 41 63125 800 E41 * 42 63925 800 E42 * 43 64725 800 E43 * 44 65525 800 E44 * 45 66325 800 E45 * 46 67125 800 E46 * 47 67925 800 E47 * 48 68725 800 E48 * 49 69525 800 E49 * 50 70325 800 E50 * 51 71125 800 E51 * 52 71925 800 E52 * 53 72725 800 E53 * 54 73525 800 E54 * 55 74325 800 E55 * 56 75125 800 E56 * 57 75925 800 E57 * 58 76725 800 E58 * 59 77525 800 E59 * 60 78325 800 E60 * 61 79125 800 E61 * 62 79925 800 E62 * 63 80725 800 E63 * 64 81525 800 E64 * 65 82325 800 E65 * 66 83125 800 E66 * 67 83925 800 E67 * 68 84725 800 E68 * 69 85525 800 E69 * * 70 4575 800 IA * 71 5375 800 IB * 72 6175 800 IC * * 74 6925 700 S01 * 75 7625 700 S02 * 76 8325 700 S03 * * 80 10525 700 S1 * 81 11225 700 S2 * 82 11925 700 S3 * 83 12625 700 S4 * 84 13325 700 S5 * 85 14025 700 S6 * 86 14725 700 S7 * 87 15425 700 S8 * 88 16125 700 S9 * 89 16825 700 S10 * 90 23125 700 S11 * 91 23825 700 S12 * 92 24525 700 S13 * 93 25225 700 S14 * 94 25925 700 S15 * 95 26625 700 S16 * 96 27325 700 S17 * 97 28025 700 S18 * 98 28725 700 S19 * 99 29425 700 S20 * * * Channels S21 - S41 are taken from * http://gemma.apple.com:80/dev/technotes/tn/tn1012.html * * 100 30325 800 S21 * 101 31125 800 S22 * 102 31925 800 S23 * 103 32725 800 S24 * 104 33525 800 S25 * 105 34325 800 S26 * 106 35125 800 S27 * 107 35925 800 S28 * 108 36725 800 S29 * 109 37525 800 S30 * 110 38325 800 S31 * 111 39125 800 S32 * 112 39925 800 S33 * 113 40725 800 S34 * 114 41525 800 S35 * 115 42325 800 S36 * 116 43125 800 S37 * 117 43925 800 S38 * 118 44725 800 S39 * 119 45525 800 S40 * 120 46325 800 S41 * * 121 3890 000 IFFREQ * */ static const int weurope[] = { 121, (int)( 38.90 * FREQFACTOR), 0, 100, (int)(303.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR), 90, (int)(231.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR), 80, (int)(105.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR), 74, (int)( 69.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR), 21, (int)(471.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR), 17, (int)(183.25 * FREQFACTOR), (int)(9.00 * FREQFACTOR), 16, (int)(175.25 * FREQFACTOR), (int)(9.00 * FREQFACTOR), 15, (int)(82.25 * FREQFACTOR), (int)(8.50 * FREQFACTOR), 13, (int)(53.75 * FREQFACTOR), (int)(8.50 * FREQFACTOR), 5, (int)(175.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR), 2, (int)(48.25 * FREQFACTOR), (int)(7.00 * FREQFACTOR), 0 }; /* * Japanese Broadcast Channels: * * 1: 91.25MHz - 3: 103.25MHz * 4: 171.25MHz - 7: 189.25MHz * 8: 193.25MHz - 12: 217.25MHz (VHF) * 13: 471.25MHz - 62: 765.25MHz (UHF) * * IF freq: 45.75 mHz * OR * IF freq: 58.75 mHz */ #define OFFSET 6.00 #define IF_FREQ 45.75 static const int jpnbcst[] = { 62, (int)(IF_FREQ * FREQFACTOR), 0, 13, (int)(471.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 8, (int)(193.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 4, (int)(171.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 1, (int)( 91.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 0 }; #undef IF_FREQ #undef OFFSET /* * Japanese Cable Channels: * * 1: 91.25MHz - 3: 103.25MHz * 4: 171.25MHz - 7: 189.25MHz * 8: 193.25MHz - 12: 217.25MHz * 13: 109.25MHz - 21: 157.25MHz * 22: 165.25MHz * 23: 223.25MHz - 63: 463.25MHz * * IF freq: 45.75 mHz */ #define OFFSET 6.00 #define IF_FREQ 45.75 static const int jpncable[] = { 63, (int)(IF_FREQ * FREQFACTOR), 0, 23, (int)(223.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 22, (int)(165.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 13, (int)(109.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 8, (int)(193.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 4, (int)(171.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 1, (int)( 91.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 0 }; #undef IF_FREQ #undef OFFSET /* * xUSSR Broadcast Channels: * * 1: 49.75MHz - 2: 59.25MHz * 3: 77.25MHz - 5: 93.25MHz * 6: 175.25MHz - 12: 223.25MHz * 13-20 - not exist * 21: 471.25MHz - 34: 575.25MHz * 35: 583.25MHz - 69: 855.25MHz * * Cable channels * * 70: 111.25MHz - 77: 167.25MHz * 78: 231.25MHz -107: 463.25MHz * * IF freq: 38.90 MHz */ #define IF_FREQ 38.90 static const int xussr[] = { 107, (int)(IF_FREQ * FREQFACTOR), 0, 78, (int)(231.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR), 70, (int)(111.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR), 35, (int)(583.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR), 21, (int)(471.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR), 6, (int)(175.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR), 3, (int)( 77.25 * FREQFACTOR), (int)(8.00 * FREQFACTOR), 1, (int)( 49.75 * FREQFACTOR), (int)(9.50 * FREQFACTOR), 0 }; #undef IF_FREQ /* * Australian broadcast channels */ #define OFFSET 7.00 #define IF_FREQ 38.90 static const int australia[] = { 83, (int)(IF_FREQ * FREQFACTOR), 0, 28, (int)(527.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 10, (int)(209.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 6, (int)(175.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 4, (int)( 95.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 3, (int)( 86.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 1, (int)( 57.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), 0 }; #undef OFFSET #undef IF_FREQ /* * France broadcast channels */ #define OFFSET 8.00 #define IF_FREQ 38.90 static const int france[] = { 69, (int)(IF_FREQ * FREQFACTOR), 0, 21, (int)(471.25 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 21 -> 69 */ 5, (int)(176.00 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 5 -> 10 */ 4, (int)( 63.75 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 4 */ 3, (int)( 60.50 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 3 */ 1, (int)( 47.75 * FREQFACTOR), (int)(OFFSET * FREQFACTOR), /* 1 2 */ 0 }; #undef OFFSET #undef IF_FREQ static const struct { const int *ptr; char name[BT848_MAX_CHNLSET_NAME_LEN]; } freqTable[] = { {NULL, ""}, {nabcst, "nabcst"}, {irccable, "cableirc"}, {hrccable, "cablehrc"}, {weurope, "weurope"}, {jpnbcst, "jpnbcst"}, {jpncable, "jpncable"}, {xussr, "xussr"}, {australia, "australia"}, {france, "france"}, }; #define TBL_CHNL freqTable[ bktr->tuner.chnlset ].ptr[ x ] #define TBL_BASE_FREQ freqTable[ bktr->tuner.chnlset ].ptr[ x + 1 ] #define TBL_OFFSET freqTable[ bktr->tuner.chnlset ].ptr[ x + 2 ] static int frequency_lookup( bktr_ptr_t bktr, int channel ) { int x; /* check for "> MAX channel" */ x = 0; if ( channel > TBL_CHNL ) return( -1 ); /* search the table for data */ for ( x = 3; TBL_CHNL; x += 3 ) { if ( channel >= TBL_CHNL ) { return( TBL_BASE_FREQ + ((channel - TBL_CHNL) * TBL_OFFSET) ); } } /* not found, must be below the MIN channel */ return( -1 ); } #undef TBL_OFFSET #undef TBL_BASE_FREQ #undef TBL_CHNL #define TBL_IF freqTable[ bktr->tuner.chnlset ].ptr[ 1 ] /* Initialise the tuner structures in the bktr_softc */ /* This is needed as the tuner details are no longer globally declared */ void select_tuner( bktr_ptr_t bktr, int tuner_type ) { if (tuner_type < Bt848_MAX_TUNER) { bktr->card.tuner = &tuners[ tuner_type ]; } else { bktr->card.tuner = NULL; } } /* * Tuner Notes: * Programming the tuner properly is quite complicated. * Here are some notes, based on a FM1246 data sheet for a PAL-I tuner. * The tuner (front end) covers 45.75 MHz - 855.25 MHz and an FM band of * 87.5 MHz to 108.0 MHz. * * RF and IF. RF = radio frequencies, it is the transmitted signal. * IF is the Intermediate Frequency (the offset from the base * signal where the video, color, audio and NICAM signals are. * * Eg, Picture at 38.9 MHz, Colour at 34.47 MHz, sound at 32.9 MHz * NICAM at 32.348 MHz. * Strangely enough, there is an IF (intermediate frequency) for * FM Radio which is 10.7 MHz. * * The tuner also works in Bands. Philips bands are * FM radio band 87.50 to 108.00 MHz * Low band 45.75 to 170.00 MHz * Mid band 170.00 to 450.00 MHz * High band 450.00 to 855.25 MHz * * * Now we need to set the PLL on the tuner to the required freuqncy. * It has a programmable divisor. * For TV we want * N = 16 (freq RF(pc) + freq IF(pc)) pc is picture carrier and RF and IF * are in MHz. * For RADIO we want a different equation. * freq IF is 10.70 MHz (so the data sheet tells me) * N = (freq RF + freq IF) / step size * The step size must be set to 50 khz (so the data sheet tells me) * (note this is 50 kHz, the other things are in MHz) * so we end up with N = 20x(freq RF + 10.7) * */ #define LOW_BAND 0 #define MID_BAND 1 #define HIGH_BAND 2 #define FM_RADIO_BAND 3 /* Check if these are correct for other than Philips PAL */ #define STATUSBIT_COLD 0x80 #define STATUSBIT_LOCK 0x40 #define STATUSBIT_TV 0x20 #define STATUSBIT_STEREO 0x10 /* valid if FM (aka not TV) */ #define STATUSBIT_ADC 0x07 /* * set the frequency of the tuner * If 'type' is TV_FREQUENCY, the frequency is freq MHz*16 * If 'type' is FM_RADIO_FREQUENCY, the frequency is freq MHz * 100 * (note *16 gives is 4 bits of fraction, eg steps of nnn.0625) * */ int tv_freq( bktr_ptr_t bktr, int frequency, int type ) { const struct TUNER* tuner; u_char addr; u_char control; u_char band; int N; int band_select = 0; #if defined( TEST_TUNER_AFC ) int oldFrequency, afcDelta; #endif tuner = bktr->card.tuner; if ( tuner == NULL ) return( -1 ); if (type == TV_FREQUENCY) { /* * select the band based on frequency * XXX FIXME: get the cross-over points from the tuner struct */ if ( frequency < (160 * FREQFACTOR ) ) band_select = LOW_BAND; else if ( frequency < (454 * FREQFACTOR ) ) band_select = MID_BAND; else band_select = HIGH_BAND; bktr->tuner.tuner_mode = BT848_TUNER_MODE_TV; #if defined( TEST_TUNER_AFC ) if ( bktr->tuner.afc ) frequency -= 4; #endif /* * N = 16 * { fRF(pc) + fIF(pc) } * or N = 16* fRF(pc) + 16*fIF(pc) } * where: * pc is picture carrier, fRF & fIF are in MHz * * fortunatly, frequency is passed in as MHz * 16 * and the TBL_IF frequency is also stored in MHz * 16 */ N = frequency + TBL_IF; /* set the address of the PLL */ addr = bktr->card.tuner_pllAddr; control = tuner->pllControl[ band_select ]; band = tuner->bandAddrs[ band_select ]; if(!(band && control)) /* Don't try to set un- */ return(-1); /* supported modes. */ if ( frequency > bktr->tuner.frequency ) { i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff ); i2cWrite( bktr, addr, control, band ); } else { i2cWrite( bktr, addr, control, band ); i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff ); } #if defined( TUNER_AFC ) if ( bktr->tuner.afc == TRUE ) { #if defined( TEST_TUNER_AFC ) oldFrequency = frequency; #endif if ( (N = do_afc( bktr, addr, N )) < 0 ) { /* AFC failed, restore requested frequency */ N = frequency + TBL_IF; #if defined( TEST_TUNER_AFC ) printf("%s: do_afc: failed to lock\n", bktr_name(bktr)); #endif i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff ); } else frequency = N - TBL_IF; #if defined( TEST_TUNER_AFC ) printf("%s: do_afc: returned freq %d (%d %% %d)\n", bktr_name(bktr), frequency, frequency / 16, frequency % 16); afcDelta = frequency - oldFrequency; printf("%s: changed by: %d clicks (%d mod %d)\n", bktr_name(bktr), afcDelta, afcDelta / 16, afcDelta % 16); #endif } #endif /* TUNER_AFC */ bktr->tuner.frequency = frequency; } if ( type == FM_RADIO_FREQUENCY ) { band_select = FM_RADIO_BAND; bktr->tuner.tuner_mode = BT848_TUNER_MODE_RADIO; /* * N = { fRF(pc) + fIF(pc) }/step_size * The step size is 50kHz for FM radio. * (eg after 102.35MHz comes 102.40 MHz) * fIF is 10.7 MHz (as detailed in the specs) * * frequency is passed in as MHz * 100 * * So, we have N = (frequency/100 + 10.70) /(50/1000) */ N = (frequency + 1070)/5; /* set the address of the PLL */ addr = bktr->card.tuner_pllAddr; control = tuner->pllControl[ band_select ]; band = tuner->bandAddrs[ band_select ]; if(!(band && control)) /* Don't try to set un- */ return(-1); /* supported modes. */ band |= bktr->tuner.radio_mode; /* tuner.radio_mode is set in * the ioctls RADIO_SETMODE * and RADIO_GETMODE */ i2cWrite( bktr, addr, control, band ); i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff ); bktr->tuner.frequency = (N * 5) - 1070; } return( 0 ); } #if defined( TUNER_AFC ) /* * */ int do_afc( bktr_ptr_t bktr, int addr, int frequency ) { int step; int status; int origFrequency; origFrequency = frequency; /* wait for first setting to take effect */ tsleep_nsec( BKTR_SLEEP, PZERO, "tuning", MSEC_TO_NSEC(1000 / 8) ); if ( (status = i2cRead( bktr, addr + 1 )) < 0 ) return( -1 ); #if defined( TEST_TUNER_AFC ) printf( "%s: Original freq: %d, status: 0x%02x\n", bktr_name(bktr), frequency, status ); #endif for ( step = 0; step < AFC_MAX_STEP; ++step ) { if ( (status = i2cRead( bktr, addr + 1 )) < 0 ) goto fubar; if ( !(status & 0x40) ) { #if defined( TEST_TUNER_AFC ) printf( "%s: no lock!\n", bktr_name(bktr) ); #endif goto fubar; } switch( status & AFC_BITS ) { case AFC_FREQ_CENTERED: #if defined( TEST_TUNER_AFC ) printf( "%s: Centered, freq: %d, status: 0x%02x\n", bktr_name(bktr), frequency, status ); #endif return( frequency ); case AFC_FREQ_MINUS_125: case AFC_FREQ_MINUS_62: #if defined( TEST_TUNER_AFC ) printf( "%s: Low, freq: %d, status: 0x%02x\n", bktr_name(bktr), frequency, status ); #endif --frequency; break; case AFC_FREQ_PLUS_62: case AFC_FREQ_PLUS_125: #if defined( TEST_TUNER_AFC ) printf( "%s: Hi, freq: %d, status: 0x%02x\n", bktr_name(bktr), frequency, status ); #endif ++frequency; break; } i2cWrite( bktr, addr, (frequency>>8) & 0x7f, frequency & 0xff ); DELAY( AFC_DELAY ); } fubar: i2cWrite( bktr, addr, (origFrequency>>8) & 0x7f, origFrequency & 0xff ); return( -1 ); } #endif /* TUNER_AFC */ #undef TBL_IF /* * Get the Tuner status and signal strength */ int get_tuner_status( bktr_ptr_t bktr ) { return i2cRead( bktr, bktr->card.tuner_pllAddr + 1 ); } /* * set the channel of the tuner */ int tv_channel( bktr_ptr_t bktr, int channel ) { int frequency; /* calculate the frequency according to tuner type */ if ( (frequency = frequency_lookup( bktr, channel )) < 0 ) return( -1 ); /* set the new frequency */ if ( tv_freq( bktr, frequency, TV_FREQUENCY ) < 0 ) return( -1 ); /* OK to update records */ return( (bktr->tuner.channel = channel) ); } /* * get channelset name */ int tuner_getchnlset(struct bktr_chnlset *chnlset) { if (( chnlset->index < CHNLSET_MIN ) || ( chnlset->index > CHNLSET_MAX )) return( EINVAL ); memcpy(&chnlset->name, &freqTable[chnlset->index].name, BT848_MAX_CHNLSET_NAME_LEN); chnlset->max_channel=freqTable[chnlset->index].ptr[0]; return( 0 ); }