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rtl-sdr/src/tuner_fc0013.c

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/*
* Fitipower FC0013 tuner driver, taken from the kernel driver that can be found
* on http://linux.terratec.de/tv_en.html
*
* This driver is a mess, and should be cleaned up/rewritten.
*
*/
#include <stdint.h>
#include "tuner_fc0013.h"
#define CRYSTAL_FREQ 28800000
#define FC0013_I2C_ADDR 0xc6
/* glue functions to rtl-sdr code */
int FC0013_Write(int pTuner, unsigned char RegAddr, unsigned char Byte)
{
uint8_t data[2];
data[0] = RegAddr;
data[1] = Byte;
if (rtl_i2c_write(FC0013_I2C_ADDR, data, 2) < 0)
return FC0013_I2C_ERROR;
return FC0013_I2C_SUCCESS;
}
int FC0013_Read(int pTuner, unsigned char RegAddr, unsigned char *pByte)
{
uint8_t data = RegAddr;
if (rtl_i2c_write(FC0013_I2C_ADDR, &data, 1) < 0)
return FC0013_I2C_ERROR;
if (rtl_i2c_read(FC0013_I2C_ADDR, &data, 1) < 0)
return FC0013_I2C_ERROR;
*pByte = data;
return FC0013_I2C_SUCCESS;
}
int FC0013_SetVhfTrack(int pTuner, unsigned long FrequencyKHz)
{
unsigned char read_byte;
if (FrequencyKHz <= 177500) // VHF Track: 7
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x1C) != FC0013_I2C_SUCCESS) goto error_status;
}
else if (FrequencyKHz <= 184500) // VHF Track: 6
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x18) != FC0013_I2C_SUCCESS) goto error_status;
}
else if (FrequencyKHz <= 191500) // VHF Track: 5
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x14) != FC0013_I2C_SUCCESS) goto error_status;
}
else if (FrequencyKHz <= 198500) // VHF Track: 4
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x10) != FC0013_I2C_SUCCESS) goto error_status;
}
else if (FrequencyKHz <= 205500) // VHF Track: 3
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x0C) != FC0013_I2C_SUCCESS) goto error_status;
}
else if (FrequencyKHz <= 212500) // VHF Track: 2
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x08) != FC0013_I2C_SUCCESS) goto error_status;
}
else if (FrequencyKHz <= 219500) // VHF Track: 2
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x08) != FC0013_I2C_SUCCESS) goto error_status;
}
else if (FrequencyKHz <= 226500) // VHF Track: 1
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x04) != FC0013_I2C_SUCCESS) goto error_status;
}
else // VHF Track: 1
{
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x04) != FC0013_I2C_SUCCESS) goto error_status;
}
//------------------------------------------------ arios modify 2010-12-24
// " | 0x10" ==> " | 0x30" (make sure reg[0x07] bit5 = 1)
// Enable VHF filter.
if(FC0013_Read(pTuner, 0x07, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x07, read_byte | 0x10) != FC0013_I2C_SUCCESS) goto error_status;
// Disable UHF & GPS.
if(FC0013_Read(pTuner, 0x14, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x14, read_byte & 0x1F) != FC0013_I2C_SUCCESS) goto error_status;
return FC0013_FUNCTION_SUCCESS;
error_status:
return FC0013_FUNCTION_ERROR;
}
// FC0013 Open Function, includes enable/reset pin control and registers initialization.
//void FC0013_Open()
int FC0013_Open()
{
int pTuner = 1;
// Enable FC0013 Power
// (...)
// FC0013 Enable = High
// (...)
// FC0013 Reset = High -> Low
// (...)
//================================ update base on new FC0013 register bank
if(FC0013_Write(pTuner, 0x01, 0x09) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x02, 0x16) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x03, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x04, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x05, 0x17) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x06, 0x02) != FC0013_I2C_SUCCESS) goto error_status;
// if(FC0013_Write(pTuner, 0x07, 0x27) != FC0013_I2C_SUCCESS) goto error_status; // 28.8MHz, GainShift: 15
if(FC0013_Write(pTuner, 0x07, 0x2A) != FC0013_I2C_SUCCESS) goto error_status; // 28.8MHz, modified by Realtek
if(FC0013_Write(pTuner, 0x08, 0xFF) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x09, 0x6F) != FC0013_I2C_SUCCESS) goto error_status; // Enable Loop Through
if(FC0013_Write(pTuner, 0x0A, 0xB8) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0B, 0x82) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0C, 0xFE) != FC0013_I2C_SUCCESS) goto error_status; // Modified for up-dowm AGC by Realtek(for master, and for 2836BU dongle).
// if(FC0013_Write(pTuner, 0x0C, 0xFC) != FC0013_I2C_SUCCESS) goto error_status; // Modified for up-dowm AGC by Realtek(for slave, and for 2832 mini dongle).
// if(FC0013_Write(pTuner, 0x0D, 0x09) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0D, 0x01) != FC0013_I2C_SUCCESS) goto error_status; // Modified for AGC non-forcing by Realtek.
if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0F, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x10, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x11, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x12, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x13, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x14, 0x50) != FC0013_I2C_SUCCESS) goto error_status; // DVB-T, High Gain
// if(FC0013_Write(pTuner, 0x14, 0x48) != FC0013_I2C_SUCCESS) goto error_status; // DVB-T, Middle Gain
// if(FC0013_Write(pTuner, 0x14, 0x40) != FC0013_I2C_SUCCESS) goto error_status; // DVB-T, Low Gain
if(FC0013_Write(pTuner, 0x15, 0x01) != FC0013_I2C_SUCCESS) goto error_status;
return FC0013_FUNCTION_SUCCESS;
error_status:
return FC0013_FUNCTION_ERROR;
}
int FC0013_SetFrequency(unsigned long Frequency, unsigned short Bandwidth)
{
// bool VCO1 = false;
// unsigned int doubleVCO;
// unsigned short xin, xdiv;
// unsigned char reg[21], am, pm, multi;
int VCO1 = FC0013_FALSE;
unsigned long doubleVCO;
unsigned short xin, xdiv;
unsigned char reg[21], am, pm, multi;
unsigned char read_byte;
unsigned long CrystalFreqKhz;
int pTuner =1;
int CrystalFreqHz = CRYSTAL_FREQ;
// Get tuner crystal frequency in KHz.
// Note: CrystalFreqKhz = round(CrystalFreqHz / 1000)
CrystalFreqKhz = (CrystalFreqHz + 500) / 1000;
// modified 2011-02-09: for D-Book test
// set VHF_Track = 7
if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
// VHF Track: 7
if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x1C) != FC0013_I2C_SUCCESS) goto error_status;
if( Frequency < 300000 )
{
// Set VHF Track.
if(FC0013_SetVhfTrack(pTuner, Frequency) != FC0013_I2C_SUCCESS) goto error_status;
// Enable VHF filter.
if(FC0013_Read(pTuner, 0x07, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x07, read_byte | 0x10) != FC0013_I2C_SUCCESS) goto error_status;
// Disable UHF & disable GPS.
if(FC0013_Read(pTuner, 0x14, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x14, read_byte & 0x1F) != FC0013_I2C_SUCCESS) goto error_status;
}
else if ( (Frequency >= 300000) && (Frequency <= 862000) )
{
// Disable VHF filter.
if(FC0013_Read(pTuner, 0x07, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x07, read_byte & 0xEF) != FC0013_I2C_SUCCESS) goto error_status;
// enable UHF & disable GPS.
if(FC0013_Read(pTuner, 0x14, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x14, (read_byte & 0x1F) | 0x40) != FC0013_I2C_SUCCESS) goto error_status;
}
else if (Frequency > 862000)
{
// Disable VHF filter
if(FC0013_Read(pTuner, 0x07, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x07, read_byte & 0xEF) != FC0013_I2C_SUCCESS) goto error_status;
// Disable UHF & enable GPS
if(FC0013_Read(pTuner, 0x14, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x14, (read_byte & 0x1F) | 0x20) != FC0013_I2C_SUCCESS) goto error_status;
}
if (Frequency * 96 < 3560000)
{
multi = 96;
reg[5] = 0x82;
reg[6] = 0x00;
}
else if (Frequency * 64 < 3560000)
{
multi = 64;
reg[5] = 0x02;
reg[6] = 0x02;
}
else if (Frequency * 48 < 3560000)
{
multi = 48;
reg[5] = 0x42;
reg[6] = 0x00;
}
else if (Frequency * 32 < 3560000)
{
multi = 32;
reg[5] = 0x82;
reg[6] = 0x02;
}
else if (Frequency * 24 < 3560000)
{
multi = 24;
reg[5] = 0x22;
reg[6] = 0x00;
}
else if (Frequency * 16 < 3560000)
{
multi = 16;
reg[5] = 0x42;
reg[6] = 0x02;
}
else if (Frequency * 12 < 3560000)
{
multi = 12;
reg[5] = 0x12;
reg[6] = 0x00;
}
else if (Frequency * 8 < 3560000)
{
multi = 8;
reg[5] = 0x22;
reg[6] = 0x02;
}
else if (Frequency * 6 < 3560000)
{
multi = 6;
reg[5] = 0x0A;
reg[6] = 0x00;
}
else if (Frequency * 4 < 3800000)
{
multi = 4;
reg[5] = 0x12;
reg[6] = 0x02;
}
else
{
Frequency = Frequency / 2;
multi = 4;
reg[5] = 0x0A;
reg[6] = 0x02;
}
doubleVCO = Frequency * multi;
reg[6] = reg[6] | 0x08;
// VCO1 = true;
VCO1 = FC0013_TRUE;
// Calculate VCO parameters: ap & pm & xin.
// xdiv = (unsigned short)(doubleVCO / (Crystal_Frequency/2));
xdiv = (unsigned short)(doubleVCO / (CrystalFreqKhz/2));
// if( (doubleVCO - xdiv * (Crystal_Frequency/2)) >= (Crystal_Frequency/4) )
if( (doubleVCO - xdiv * (CrystalFreqKhz/2)) >= (CrystalFreqKhz/4) )
{
xdiv = xdiv + 1;
}
pm = (unsigned char)( xdiv / 8 );
am = (unsigned char)( xdiv - (8 * pm));
if (am < 2)
{
reg[1] = am + 8;
reg[2] = pm - 1;
}
else
{
reg[1] = am;
reg[2] = pm;
}
// xin = (unsigned short)(doubleVCO - ((unsigned short)(doubleVCO / (Crystal_Frequency/2))) * (Crystal_Frequency/2));
xin = (unsigned short)(doubleVCO - ((unsigned short)(doubleVCO / (CrystalFreqKhz/2))) * (CrystalFreqKhz/2));
// xin = ((xin << 15)/(Crystal_Frequency/2));
xin = (unsigned short)((xin << 15)/(CrystalFreqKhz/2));
// if( xin >= (unsigned short) pow( (double)2, (double)14) )
// {
// xin = xin + (unsigned short) pow( (double)2, (double)15);
// }
if( xin >= (unsigned short) 16384 )
xin = xin + (unsigned short) 32768;
reg[3] = (unsigned char)(xin >> 8);
reg[4] = (unsigned char)(xin & 0x00FF);
//===================================== Only for testing
// printf("Frequency: %d, Fa: %d, Fp: %d, Xin:%d \n", Frequency, am, pm, xin);
// Set Low-Pass Filter Bandwidth.
switch(Bandwidth)
{
case 6:
reg[6] = 0x80 | reg[6];
break;
case 7:
reg[6] = ~0x80 & reg[6];
reg[6] = 0x40 | reg[6];
break;
case 8:
default:
reg[6] = ~0xC0 & reg[6];
break;
}
reg[5] = reg[5] | 0x07;
if(FC0013_Write(pTuner, 0x01, reg[1]) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x02, reg[2]) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x03, reg[3]) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x04, reg[4]) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x05, reg[5]) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x06, reg[6]) != FC0013_I2C_SUCCESS) goto error_status;
if (multi == 64)
{
// FC0013_Write(0x11, FC0013_Read(0x11) | 0x04);
if(FC0013_Read(pTuner, 0x11, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x11, read_byte | 0x04) != FC0013_I2C_SUCCESS) goto error_status;
}
else
{
// FC0013_Write(0x11, FC0013_Read(0x11) & 0xFB);
if(FC0013_Read(pTuner, 0x11, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x11, read_byte & 0xFB) != FC0013_I2C_SUCCESS) goto error_status;
}
if(FC0013_Write(pTuner, 0x0E, 0x80) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
// reg[14] = 0x3F & FC0013_Read(0x0E);
if(FC0013_Read(pTuner, 0x0E, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
reg[14] = 0x3F & read_byte;
if (VCO1)
{
if (reg[14] > 0x3C)
{
reg[6] = ~0x08 & reg[6];
if(FC0013_Write(pTuner, 0x06, reg[6]) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0E, 0x80) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
}
}
else
{
if (reg[14] < 0x02)
{
reg[6] = 0x08 | reg[6];
if(FC0013_Write(pTuner, 0x06, reg[6]) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0E, 0x80) != FC0013_I2C_SUCCESS) goto error_status;
if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
}
}
return 1;
error_status:
return 0;
}