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220222_final/GW/rtl-sdr/src/tuner_fc2580.c
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/*
* FCI FC2580 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 "rtlsdr_i2c.h"
#include "tuner_fc2580.h"
/* 16.384 MHz (at least on the Logilink VG0002A) */
#define CRYSTAL_FREQ 16384000
/* glue functions to rtl-sdr code */
fc2580_fci_result_type fc2580_i2c_write(void *pTuner, unsigned char reg, unsigned char val)
{
uint8_t data[2];
data[0] = reg;
data[1] = val;
if (rtlsdr_i2c_write_fn(pTuner, FC2580_I2C_ADDR, data, 2) < 0)
return FC2580_FCI_FAIL;
return FC2580_FCI_SUCCESS;
}
fc2580_fci_result_type fc2580_i2c_read(void *pTuner, unsigned char reg, unsigned char *read_data)
{
uint8_t data = reg;
if (rtlsdr_i2c_write_fn(pTuner, FC2580_I2C_ADDR, &data, 1) < 0)
return FC2580_FCI_FAIL;
if (rtlsdr_i2c_read_fn(pTuner, FC2580_I2C_ADDR, &data, 1) < 0)
return FC2580_FCI_FAIL;
*read_data = data;
return FC2580_FCI_SUCCESS;
}
int
fc2580_Initialize(
void *pTuner
)
{
int AgcMode;
unsigned int CrystalFreqKhz;
//TODO set AGC mode
AgcMode = FC2580_AGC_EXTERNAL;
// Initialize tuner with AGC mode.
// Note: CrystalFreqKhz = round(CrystalFreqHz / 1000)
CrystalFreqKhz = (unsigned int)((CRYSTAL_FREQ + 500) / 1000);
if(fc2580_set_init(pTuner, AgcMode, CrystalFreqKhz) != FC2580_FCI_SUCCESS)
goto error_status_initialize_tuner;
return FUNCTION_SUCCESS;
error_status_initialize_tuner:
return FUNCTION_ERROR;
}
int
fc2580_SetRfFreqHz(
void *pTuner,
unsigned long RfFreqHz
)
{
unsigned int RfFreqKhz;
unsigned int CrystalFreqKhz;
// Set tuner RF frequency in KHz.
// Note: RfFreqKhz = round(RfFreqHz / 1000)
// CrystalFreqKhz = round(CrystalFreqHz / 1000)
RfFreqKhz = (unsigned int)((RfFreqHz + 500) / 1000);
CrystalFreqKhz = (unsigned int)((CRYSTAL_FREQ + 500) / 1000);
if(fc2580_set_freq(pTuner, RfFreqKhz, CrystalFreqKhz) != FC2580_FCI_SUCCESS)
goto error_status_set_tuner_rf_frequency;
return FUNCTION_SUCCESS;
error_status_set_tuner_rf_frequency:
return FUNCTION_ERROR;
}
/**
@brief Set FC2580 tuner bandwidth mode.
*/
int
fc2580_SetBandwidthMode(
void *pTuner,
int BandwidthMode
)
{
unsigned int CrystalFreqKhz;
// Set tuner bandwidth mode.
// Note: CrystalFreqKhz = round(CrystalFreqHz / 1000)
CrystalFreqKhz = (unsigned int)((CRYSTAL_FREQ + 500) / 1000);
if(fc2580_set_filter(pTuner, (unsigned char)BandwidthMode, CrystalFreqKhz) != FC2580_FCI_SUCCESS)
goto error_status_set_tuner_bandwidth_mode;
return FUNCTION_SUCCESS;
error_status_set_tuner_bandwidth_mode:
return FUNCTION_ERROR;
}
void fc2580_wait_msec(void *pTuner, int a)
{
/* USB latency is enough for now ;) */
// usleep(a * 1000);
return;
}
/*==============================================================================
fc2580 initial setting
This function is a generic function which gets called to initialize
fc2580 in DVB-H mode or L-Band TDMB mode
<input parameter>
ifagc_mode
type : integer
1 : Internal AGC
2 : Voltage Control Mode
==============================================================================*/
fc2580_fci_result_type fc2580_set_init( void *pTuner, int ifagc_mode, unsigned int freq_xtal )
{
fc2580_fci_result_type result = FC2580_FCI_SUCCESS;
result &= fc2580_i2c_write(pTuner, 0x00, 0x00); /*** Confidential ***/
result &= fc2580_i2c_write(pTuner, 0x12, 0x86);
result &= fc2580_i2c_write(pTuner, 0x14, 0x5C);
result &= fc2580_i2c_write(pTuner, 0x16, 0x3C);
result &= fc2580_i2c_write(pTuner, 0x1F, 0xD2);
result &= fc2580_i2c_write(pTuner, 0x09, 0xD7);
result &= fc2580_i2c_write(pTuner, 0x0B, 0xD5);
result &= fc2580_i2c_write(pTuner, 0x0C, 0x32);
result &= fc2580_i2c_write(pTuner, 0x0E, 0x43);
result &= fc2580_i2c_write(pTuner, 0x21, 0x0A);
result &= fc2580_i2c_write(pTuner, 0x22, 0x82);
if( ifagc_mode == 1 )
{
result &= fc2580_i2c_write(pTuner, 0x45, 0x10); //internal AGC
result &= fc2580_i2c_write(pTuner, 0x4C, 0x00); //HOLD_AGC polarity
}
else if( ifagc_mode == 2 )
{
result &= fc2580_i2c_write(pTuner, 0x45, 0x20); //Voltage Control Mode
result &= fc2580_i2c_write(pTuner, 0x4C, 0x02); //HOLD_AGC polarity
}
result &= fc2580_i2c_write(pTuner, 0x3F, 0x88);
result &= fc2580_i2c_write(pTuner, 0x02, 0x0E);
result &= fc2580_i2c_write(pTuner, 0x58, 0x14);
result &= fc2580_set_filter(pTuner, 8, freq_xtal); //BW = 7.8MHz
return result;
}
/*==============================================================================
fc2580 frequency setting
This function is a generic function which gets called to change LO Frequency
of fc2580 in DVB-H mode or L-Band TDMB mode
<input parameter>
freq_xtal: kHz
f_lo
Value of target LO Frequency in 'kHz' unit
ex) 2.6GHz = 2600000
==============================================================================*/
fc2580_fci_result_type fc2580_set_freq( void *pTuner, unsigned int f_lo, unsigned int freq_xtal )
{
unsigned int f_diff, f_diff_shifted, n_val, k_val;
unsigned int f_vco, r_val, f_comp;
unsigned char pre_shift_bits = 4;// number of preshift to prevent overflow in shifting f_diff to f_diff_shifted
unsigned char data_0x18;
unsigned char data_0x02 = (USE_EXT_CLK<<5)|0x0E;
fc2580_band_type band = ( f_lo > 1000000 )? FC2580_L_BAND : ( f_lo > 400000 )? FC2580_UHF_BAND : FC2580_VHF_BAND;
fc2580_fci_result_type result = FC2580_FCI_SUCCESS;
f_vco = ( band == FC2580_UHF_BAND )? f_lo * 4 : (( band == FC2580_L_BAND )? f_lo * 2 : f_lo * 12);
r_val = ( f_vco >= 2*76*freq_xtal )? 1 : ( f_vco >= 76*freq_xtal )? 2 : 4;
f_comp = freq_xtal/r_val;
n_val = ( f_vco / 2 ) / f_comp;
f_diff = f_vco - 2* f_comp * n_val;
f_diff_shifted = f_diff << ( 20 - pre_shift_bits );
k_val = f_diff_shifted / ( ( 2* f_comp ) >> pre_shift_bits );
if( f_diff_shifted - k_val * ( ( 2* f_comp ) >> pre_shift_bits ) >= ( f_comp >> pre_shift_bits ) )
k_val = k_val + 1;
if( f_vco >= BORDER_FREQ ) //Select VCO Band
data_0x02 = data_0x02 | 0x08; //0x02[3] = 1;
else
data_0x02 = data_0x02 & 0xF7; //0x02[3] = 0;
// if( band != curr_band ) {
switch(band)
{
case FC2580_UHF_BAND:
data_0x02 = (data_0x02 & 0x3F);
result &= fc2580_i2c_write(pTuner, 0x25, 0xF0);
result &= fc2580_i2c_write(pTuner, 0x27, 0x77);
result &= fc2580_i2c_write(pTuner, 0x28, 0x53);
result &= fc2580_i2c_write(pTuner, 0x29, 0x60);
result &= fc2580_i2c_write(pTuner, 0x30, 0x09);
result &= fc2580_i2c_write(pTuner, 0x50, 0x8C);
result &= fc2580_i2c_write(pTuner, 0x53, 0x50);
if( f_lo < 538000 )
result &= fc2580_i2c_write(pTuner, 0x5F, 0x13);
else
result &= fc2580_i2c_write(pTuner, 0x5F, 0x15);
if( f_lo < 538000 )
{
result &= fc2580_i2c_write(pTuner, 0x61, 0x07);
result &= fc2580_i2c_write(pTuner, 0x62, 0x06);
result &= fc2580_i2c_write(pTuner, 0x67, 0x06);
result &= fc2580_i2c_write(pTuner, 0x68, 0x08);
result &= fc2580_i2c_write(pTuner, 0x69, 0x10);
result &= fc2580_i2c_write(pTuner, 0x6A, 0x12);
}
else if( f_lo < 794000 )
{
result &= fc2580_i2c_write(pTuner, 0x61, 0x03);
result &= fc2580_i2c_write(pTuner, 0x62, 0x03);
result &= fc2580_i2c_write(pTuner, 0x67, 0x03); //ACI improve
result &= fc2580_i2c_write(pTuner, 0x68, 0x05); //ACI improve
result &= fc2580_i2c_write(pTuner, 0x69, 0x0C);
result &= fc2580_i2c_write(pTuner, 0x6A, 0x0E);
}
else
{
result &= fc2580_i2c_write(pTuner, 0x61, 0x07);
result &= fc2580_i2c_write(pTuner, 0x62, 0x06);
result &= fc2580_i2c_write(pTuner, 0x67, 0x07);
result &= fc2580_i2c_write(pTuner, 0x68, 0x09);
result &= fc2580_i2c_write(pTuner, 0x69, 0x10);
result &= fc2580_i2c_write(pTuner, 0x6A, 0x12);
}
result &= fc2580_i2c_write(pTuner, 0x63, 0x15);
result &= fc2580_i2c_write(pTuner, 0x6B, 0x0B);
result &= fc2580_i2c_write(pTuner, 0x6C, 0x0C);
result &= fc2580_i2c_write(pTuner, 0x6D, 0x78);
result &= fc2580_i2c_write(pTuner, 0x6E, 0x32);
result &= fc2580_i2c_write(pTuner, 0x6F, 0x14);
result &= fc2580_set_filter(pTuner, 8, freq_xtal); //BW = 7.8MHz
break;
case FC2580_VHF_BAND:
data_0x02 = (data_0x02 & 0x3F) | 0x80;
result &= fc2580_i2c_write(pTuner, 0x27, 0x77);
result &= fc2580_i2c_write(pTuner, 0x28, 0x33);
result &= fc2580_i2c_write(pTuner, 0x29, 0x40);
result &= fc2580_i2c_write(pTuner, 0x30, 0x09);
result &= fc2580_i2c_write(pTuner, 0x50, 0x8C);
result &= fc2580_i2c_write(pTuner, 0x53, 0x50);
result &= fc2580_i2c_write(pTuner, 0x5F, 0x0F);
result &= fc2580_i2c_write(pTuner, 0x61, 0x07);
result &= fc2580_i2c_write(pTuner, 0x62, 0x00);
result &= fc2580_i2c_write(pTuner, 0x63, 0x15);
result &= fc2580_i2c_write(pTuner, 0x67, 0x03);
result &= fc2580_i2c_write(pTuner, 0x68, 0x05);
result &= fc2580_i2c_write(pTuner, 0x69, 0x10);
result &= fc2580_i2c_write(pTuner, 0x6A, 0x12);
result &= fc2580_i2c_write(pTuner, 0x6B, 0x08);
result &= fc2580_i2c_write(pTuner, 0x6C, 0x0A);
result &= fc2580_i2c_write(pTuner, 0x6D, 0x78);
result &= fc2580_i2c_write(pTuner, 0x6E, 0x32);
result &= fc2580_i2c_write(pTuner, 0x6F, 0x54);
result &= fc2580_set_filter(pTuner, 7, freq_xtal); //BW = 6.8MHz
break;
case FC2580_L_BAND:
data_0x02 = (data_0x02 & 0x3F) | 0x40;
result &= fc2580_i2c_write(pTuner, 0x2B, 0x70);
result &= fc2580_i2c_write(pTuner, 0x2C, 0x37);
result &= fc2580_i2c_write(pTuner, 0x2D, 0xE7);
result &= fc2580_i2c_write(pTuner, 0x30, 0x09);
result &= fc2580_i2c_write(pTuner, 0x44, 0x20);
result &= fc2580_i2c_write(pTuner, 0x50, 0x8C);
result &= fc2580_i2c_write(pTuner, 0x53, 0x50);
result &= fc2580_i2c_write(pTuner, 0x5F, 0x0F);
result &= fc2580_i2c_write(pTuner, 0x61, 0x0F);
result &= fc2580_i2c_write(pTuner, 0x62, 0x00);
result &= fc2580_i2c_write(pTuner, 0x63, 0x13);
result &= fc2580_i2c_write(pTuner, 0x67, 0x00);
result &= fc2580_i2c_write(pTuner, 0x68, 0x02);
result &= fc2580_i2c_write(pTuner, 0x69, 0x0C);
result &= fc2580_i2c_write(pTuner, 0x6A, 0x0E);
result &= fc2580_i2c_write(pTuner, 0x6B, 0x08);
result &= fc2580_i2c_write(pTuner, 0x6C, 0x0A);
result &= fc2580_i2c_write(pTuner, 0x6D, 0xA0);
result &= fc2580_i2c_write(pTuner, 0x6E, 0x50);
result &= fc2580_i2c_write(pTuner, 0x6F, 0x14);
result &= fc2580_set_filter(pTuner, 1, freq_xtal); //BW = 1.53MHz
break;
default:
break;
}
// curr_band = band;
// }
//A command about AGC clock's pre-divide ratio
if( freq_xtal >= 28000 )
result &= fc2580_i2c_write(pTuner, 0x4B, 0x22 );
//Commands about VCO Band and PLL setting.
result &= fc2580_i2c_write(pTuner, 0x02, data_0x02);
data_0x18 = ( ( r_val == 1 )? 0x00 : ( ( r_val == 2 )? 0x10 : 0x20 ) ) + (unsigned char)(k_val >> 16);
result &= fc2580_i2c_write(pTuner, 0x18, data_0x18); //Load 'R' value and high part of 'K' values
result &= fc2580_i2c_write(pTuner, 0x1A, (unsigned char)( k_val >> 8 ) ); //Load middle part of 'K' value
result &= fc2580_i2c_write(pTuner, 0x1B, (unsigned char)( k_val ) ); //Load lower part of 'K' value
result &= fc2580_i2c_write(pTuner, 0x1C, (unsigned char)( n_val ) ); //Load 'N' value
//A command about UHF LNA Load Cap
if( band == FC2580_UHF_BAND )
result &= fc2580_i2c_write(pTuner, 0x2D, ( f_lo <= (unsigned int)794000 )? 0x9F : 0x8F ); //LNA_OUT_CAP
return result;
}
/*==============================================================================
fc2580 filter BW setting
This function is a generic function which gets called to change Bandwidth
frequency of fc2580's channel selection filter
<input parameter>
freq_xtal: kHz
filter_bw
1 : 1.53MHz(TDMB)
6 : 6MHz (Bandwidth 6MHz)
7 : 6.8MHz (Bandwidth 7MHz)
8 : 7.8MHz (Bandwidth 8MHz)
==============================================================================*/
fc2580_fci_result_type fc2580_set_filter( void *pTuner, unsigned char filter_bw, unsigned int freq_xtal )
{
unsigned char cal_mon = 0, i;
fc2580_fci_result_type result = FC2580_FCI_SUCCESS;
if(filter_bw == 1)
{
result &= fc2580_i2c_write(pTuner, 0x36, 0x1C);
result &= fc2580_i2c_write(pTuner, 0x37, (unsigned char)(4151*freq_xtal/1000000) );
result &= fc2580_i2c_write(pTuner, 0x39, 0x00);
result &= fc2580_i2c_write(pTuner, 0x2E, 0x09);
}
if(filter_bw == 6)
{
result &= fc2580_i2c_write(pTuner, 0x36, 0x18);
result &= fc2580_i2c_write(pTuner, 0x37, (unsigned char)(4400*freq_xtal/1000000) );
result &= fc2580_i2c_write(pTuner, 0x39, 0x00);
result &= fc2580_i2c_write(pTuner, 0x2E, 0x09);
}
else if(filter_bw == 7)
{
result &= fc2580_i2c_write(pTuner, 0x36, 0x18);
result &= fc2580_i2c_write(pTuner, 0x37, (unsigned char)(3910*freq_xtal/1000000) );
result &= fc2580_i2c_write(pTuner, 0x39, 0x80);
result &= fc2580_i2c_write(pTuner, 0x2E, 0x09);
}
else if(filter_bw == 8)
{
result &= fc2580_i2c_write(pTuner, 0x36, 0x18);
result &= fc2580_i2c_write(pTuner, 0x37, (unsigned char)(3300*freq_xtal/1000000) );
result &= fc2580_i2c_write(pTuner, 0x39, 0x80);
result &= fc2580_i2c_write(pTuner, 0x2E, 0x09);
}
for(i=0; i<5; i++)
{
fc2580_wait_msec(pTuner, 5);//wait 5ms
result &= fc2580_i2c_read(pTuner, 0x2F, &cal_mon);
if( (cal_mon & 0xC0) != 0xC0)
{
result &= fc2580_i2c_write(pTuner, 0x2E, 0x01);
result &= fc2580_i2c_write(pTuner, 0x2E, 0x09);
}
else
break;
}
result &= fc2580_i2c_write(pTuner, 0x2E, 0x01);
return result;
}
/*==============================================================================
fc2580 RSSI function
This function is a generic function which returns fc2580's
current RSSI value.
<input parameter>
none
<return value>
int
rssi : estimated input power.
==============================================================================*/
//int fc2580_get_rssi(void) {
//
// unsigned char s_lna, s_rfvga, s_cfs, s_ifvga;
// int ofs_lna, ofs_rfvga, ofs_csf, ofs_ifvga, rssi;
//
// fc2580_i2c_read(0x71, &s_lna );
// fc2580_i2c_read(0x72, &s_rfvga );
// fc2580_i2c_read(0x73, &s_cfs );
// fc2580_i2c_read(0x74, &s_ifvga );
//
//
// ofs_lna =
// (curr_band==FC2580_UHF_BAND)?
// (s_lna==0)? 0 :
// (s_lna==1)? -6 :
// (s_lna==2)? -17 :
// (s_lna==3)? -22 : -30 :
// (curr_band==FC2580_VHF_BAND)?
// (s_lna==0)? 0 :
// (s_lna==1)? -6 :
// (s_lna==2)? -19 :
// (s_lna==3)? -24 : -32 :
// (curr_band==FC2580_L_BAND)?
// (s_lna==0)? 0 :
// (s_lna==1)? -6 :
// (s_lna==2)? -11 :
// (s_lna==3)? -16 : -34 :
// 0;//FC2580_NO_BAND
// ofs_rfvga = -s_rfvga+((s_rfvga>=11)? 1 : 0) + ((s_rfvga>=18)? 1 : 0);
// ofs_csf = -6*s_cfs;
// ofs_ifvga = s_ifvga/4;
//
// return rssi = ofs_lna+ofs_rfvga+ofs_csf+ofs_ifvga+OFS_RSSI;
//
//}
/*==============================================================================
fc2580 Xtal frequency Setting
This function is a generic function which sets
the frequency of xtal.
<input parameter>
frequency
frequency value of internal(external) Xtal(clock) in kHz unit.
==============================================================================*/
//void fc2580_set_freq_xtal(unsigned int frequency) {
//
// freq_xtal = frequency;
//
//}
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