1 /* 2 * Copyright (c) 2004-2007 Marcus Overhagen <marcus@overhagen.de> 3 * 4 * Permission is hereby granted, free of charge, to any person 5 * obtaining a copy of this software and associated documentation 6 * files (the "Software"), to deal in the Software without restriction, 7 * including without limitation the rights to use, copy, modify, 8 * merge, publish, distribute, sublicense, and/or sell copies of 9 * the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 #include <KernelExport.h> 26 #include "dtt7592.h" 27 #include "config.h" 28 29 #define TRACE_DTT7592 30 #ifdef TRACE_DTT7592 31 #define TRACE dprintf 32 #else 33 #define TRACE(a...) 34 #endif 35 36 37 status_t 38 dtt7592_write(i2c_bus *bus, const uint8 data[4]) 39 { 40 status_t res; 41 TRACE("dtt7592_write values 0x%02x 0x%02x 0x%02x 0x%02x\n", data[0], data[1], data[2], data[3]); 42 res = i2c_write(bus, I2C_ADDR_PLL, data, 4); 43 if (res != B_OK) 44 TRACE("dtt7592_write error, values 0x%02x 0x%02x 0x%02x 0x%02x\n", data[0], data[1], data[2], data[3]); 45 return res; 46 } 47 48 49 status_t 50 dtt7592_read(i2c_bus *bus, uint8 *data) 51 { 52 status_t res; 53 res = i2c_read(bus, I2C_ADDR_PLL, data, 1); 54 if (res != B_OK) 55 TRACE("dtt7592_read error\n"); 56 return res; 57 } 58 59 60 status_t 61 dtt7592_set_frequency(i2c_bus *bus, uint32 frequency, dvb_bandwidth_t bandwidth) 62 { 63 status_t res; 64 uint32 divider; 65 uint8 data[4]; 66 67 divider = (frequency + 36083333) / 166666; 68 if (divider > 0x7fff) 69 divider = 0x7fff; 70 71 TRACE("dtt7592_set_frequency frequency %" B_PRId32 ", divider 0x%" 72 B_PRIx32 " (%" B_PRId32 ")\n", frequency, divider, divider); 73 74 data[0] = divider >> 8; 75 data[1] = (uint8)divider; 76 77 if (frequency > 835000000) 78 data[2] = 0xfc; 79 else if (frequency > 735000000) 80 data[2] = 0xf4; 81 else if (frequency > 465000000) 82 data[2] = 0xbc; 83 else if (frequency > 445000000) 84 data[2] = 0xfc; 85 else if (frequency > 405000000) 86 data[2] = 0xf4; 87 else if (frequency > 305000000) 88 data[2] = 0xbc; 89 else 90 data[2] = 0xb4; 91 92 if (frequency > 429000000) 93 data[3] = 0x08; // select UHF IV/V 94 else 95 data[3] = 0x02; // select VHF III 96 97 // only used in Germany right now, where VHF channels 98 // are 7 MHz wide, while UHF are 8 MHz. 99 if (bandwidth == DVB_BANDWIDTH_5_MHZ 100 || bandwidth == DVB_BANDWIDTH_6_MHZ 101 || bandwidth == DVB_BANDWIDTH_7_MHZ) { 102 data[3] |= 0x10; // activate 7 Mhz filter 103 } 104 105 res = dtt7592_write(bus, data); 106 if (res != B_OK) { 107 dprintf("dtt7592_set_frequency step 1 failed\n"); 108 return res; 109 } 110 111 // enable AGC 112 data[2] = (data[2] & 0x40) | 0x9c; 113 data[3] = 0xa0; 114 res = dtt7592_write(bus, data); 115 if (res != B_OK) { 116 dprintf("dtt7592_set_frequency step 2 failed\n"); 117 return res; 118 } 119 120 // wait 100 ms 121 snooze(100000); 122 123 // disable AGC 124 data[3] = 0x20; 125 res = dtt7592_write(bus, data); 126 if (res != B_OK) { 127 dprintf("dtt7592_set_frequency step 3 failed\n"); 128 return res; 129 } 130 131 return B_OK; 132 } 133 134 135 #if 0 136 void 137 dtt7582_dump(i2c_bus *bus) 138 { 139 uint8 data; 140 if (B_OK != dtt7592_read(bus, &data)) { 141 TRACE("dtt7582_dump failed\n"); 142 } 143 TRACE("dtt7582_dump: 0x%02x, PLL %s, AGC %s\n", data, (data & 0x40) ? "locked" : "open", (data & 0x08) ? "active" : "off"); 144 } 145 146 147 void 148 dtt7582_test(i2c_bus *bus) 149 { 150 TRACE("dtt7582_test start\n"); 151 dtt7582_dump(bus); 152 TRACE("dtt7582_test freq 1\n"); 153 dtt7592_set_frequency(bus, 150000000, DVB_BANDWIDTH_7_MHZ); 154 dtt7582_dump(bus); 155 TRACE("dtt7582_test freq 2\n"); 156 dtt7592_set_frequency(bus, 746000000, DVB_BANDWIDTH_8_MHZ); // Kabel 1 157 dtt7582_dump(bus); 158 TRACE("dtt7582_test freq 3\n"); 159 dtt7592_set_frequency(bus, 538000000, DVB_BANDWIDTH_7_MHZ); // VOX 160 dtt7582_dump(bus); 161 TRACE("dtt7582_test freq 4\n"); 162 dtt7592_set_frequency(bus, 896000000, DVB_BANDWIDTH_8_MHZ); 163 dtt7582_dump(bus); 164 TRACE("dtt7582_test freq 5\n"); 165 dtt7592_set_frequency(bus, 333000000, DVB_BANDWIDTH_7_MHZ); 166 dtt7582_dump(bus); 167 } 168 #endif 169