mirror of
https://github.com/rtlsdrblog/rtl-sdr-blog.git
synced 2024-11-06 18:57:42 +01:00
495 lines
15 KiB
C
495 lines
15 KiB
C
/*
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* FCI FC2580 tuner driver, taken from the kernel driver that can be found
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* on http://linux.terratec.de/tv_en.html
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*
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* This driver is a mess, and should be cleaned up/rewritten.
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*
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*/
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#include <stdint.h>
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#include "rtlsdr_i2c.h"
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#include "tuner_fc2580.h"
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/* 16.384 MHz (at least on the Logilink VG0002A) */
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#define CRYSTAL_FREQ 16384000
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/* glue functions to rtl-sdr code */
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fc2580_fci_result_type fc2580_i2c_write(void *pTuner, unsigned char reg, unsigned char val)
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{
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uint8_t data[2];
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data[0] = reg;
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data[1] = val;
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if (rtlsdr_i2c_write_fn(pTuner, FC2580_I2C_ADDR, data, 2) < 0)
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return FC2580_FCI_FAIL;
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return FC2580_FCI_SUCCESS;
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}
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fc2580_fci_result_type fc2580_i2c_read(void *pTuner, unsigned char reg, unsigned char *read_data)
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{
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uint8_t data = reg;
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if (rtlsdr_i2c_write_fn(pTuner, FC2580_I2C_ADDR, &data, 1) < 0)
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return FC2580_FCI_FAIL;
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if (rtlsdr_i2c_read_fn(pTuner, FC2580_I2C_ADDR, &data, 1) < 0)
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return FC2580_FCI_FAIL;
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*read_data = data;
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return FC2580_FCI_SUCCESS;
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}
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int
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fc2580_Initialize(
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void *pTuner
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)
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{
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int AgcMode;
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unsigned int CrystalFreqKhz;
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//TODO set AGC mode
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AgcMode = FC2580_AGC_EXTERNAL;
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// Initialize tuner with AGC mode.
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// Note: CrystalFreqKhz = round(CrystalFreqHz / 1000)
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CrystalFreqKhz = (unsigned int)((CRYSTAL_FREQ + 500) / 1000);
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if(fc2580_set_init(pTuner, AgcMode, CrystalFreqKhz) != FC2580_FCI_SUCCESS)
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goto error_status_initialize_tuner;
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return FUNCTION_SUCCESS;
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error_status_initialize_tuner:
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return FUNCTION_ERROR;
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}
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int
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fc2580_SetRfFreqHz(
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void *pTuner,
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unsigned long RfFreqHz
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)
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{
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unsigned int RfFreqKhz;
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unsigned int CrystalFreqKhz;
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// Set tuner RF frequency in KHz.
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// Note: RfFreqKhz = round(RfFreqHz / 1000)
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// CrystalFreqKhz = round(CrystalFreqHz / 1000)
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RfFreqKhz = (unsigned int)((RfFreqHz + 500) / 1000);
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CrystalFreqKhz = (unsigned int)((CRYSTAL_FREQ + 500) / 1000);
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if(fc2580_set_freq(pTuner, RfFreqKhz, CrystalFreqKhz) != FC2580_FCI_SUCCESS)
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goto error_status_set_tuner_rf_frequency;
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return FUNCTION_SUCCESS;
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error_status_set_tuner_rf_frequency:
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return FUNCTION_ERROR;
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}
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/**
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@brief Set FC2580 tuner bandwidth mode.
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*/
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int
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fc2580_SetBandwidthMode(
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void *pTuner,
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int BandwidthMode
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)
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{
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unsigned int CrystalFreqKhz;
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// Set tuner bandwidth mode.
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// Note: CrystalFreqKhz = round(CrystalFreqHz / 1000)
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CrystalFreqKhz = (unsigned int)((CRYSTAL_FREQ + 500) / 1000);
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if(fc2580_set_filter(pTuner, (unsigned char)BandwidthMode, CrystalFreqKhz) != FC2580_FCI_SUCCESS)
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goto error_status_set_tuner_bandwidth_mode;
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return FUNCTION_SUCCESS;
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error_status_set_tuner_bandwidth_mode:
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return FUNCTION_ERROR;
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}
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void fc2580_wait_msec(void *pTuner, int a)
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{
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/* USB latency is enough for now ;) */
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// usleep(a * 1000);
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return;
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}
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/*==============================================================================
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fc2580 initial setting
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This function is a generic function which gets called to initialize
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fc2580 in DVB-H mode or L-Band TDMB mode
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<input parameter>
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ifagc_mode
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type : integer
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1 : Internal AGC
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2 : Voltage Control Mode
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==============================================================================*/
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fc2580_fci_result_type fc2580_set_init( void *pTuner, int ifagc_mode, unsigned int freq_xtal )
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{
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fc2580_fci_result_type result = FC2580_FCI_SUCCESS;
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result &= fc2580_i2c_write(pTuner, 0x00, 0x00); /*** Confidential ***/
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result &= fc2580_i2c_write(pTuner, 0x12, 0x86);
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result &= fc2580_i2c_write(pTuner, 0x14, 0x5C);
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result &= fc2580_i2c_write(pTuner, 0x16, 0x3C);
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result &= fc2580_i2c_write(pTuner, 0x1F, 0xD2);
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result &= fc2580_i2c_write(pTuner, 0x09, 0xD7);
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result &= fc2580_i2c_write(pTuner, 0x0B, 0xD5);
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result &= fc2580_i2c_write(pTuner, 0x0C, 0x32);
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result &= fc2580_i2c_write(pTuner, 0x0E, 0x43);
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result &= fc2580_i2c_write(pTuner, 0x21, 0x0A);
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result &= fc2580_i2c_write(pTuner, 0x22, 0x82);
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if( ifagc_mode == 1 )
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{
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result &= fc2580_i2c_write(pTuner, 0x45, 0x10); //internal AGC
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result &= fc2580_i2c_write(pTuner, 0x4C, 0x00); //HOLD_AGC polarity
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}
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else if( ifagc_mode == 2 )
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{
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result &= fc2580_i2c_write(pTuner, 0x45, 0x20); //Voltage Control Mode
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result &= fc2580_i2c_write(pTuner, 0x4C, 0x02); //HOLD_AGC polarity
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}
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result &= fc2580_i2c_write(pTuner, 0x3F, 0x88);
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result &= fc2580_i2c_write(pTuner, 0x02, 0x0E);
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result &= fc2580_i2c_write(pTuner, 0x58, 0x14);
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result &= fc2580_set_filter(pTuner, 8, freq_xtal); //BW = 7.8MHz
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return result;
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}
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/*==============================================================================
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fc2580 frequency setting
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This function is a generic function which gets called to change LO Frequency
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of fc2580 in DVB-H mode or L-Band TDMB mode
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<input parameter>
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freq_xtal: kHz
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f_lo
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Value of target LO Frequency in 'kHz' unit
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ex) 2.6GHz = 2600000
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==============================================================================*/
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fc2580_fci_result_type fc2580_set_freq( void *pTuner, unsigned int f_lo, unsigned int freq_xtal )
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{
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unsigned int f_diff, f_diff_shifted, n_val, k_val;
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unsigned int f_vco, r_val, f_comp;
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unsigned char pre_shift_bits = 4;// number of preshift to prevent overflow in shifting f_diff to f_diff_shifted
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unsigned char data_0x18;
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unsigned char data_0x02 = (USE_EXT_CLK<<5)|0x0E;
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fc2580_band_type band = ( f_lo > 1000000 )? FC2580_L_BAND : ( f_lo > 400000 )? FC2580_UHF_BAND : FC2580_VHF_BAND;
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fc2580_fci_result_type result = FC2580_FCI_SUCCESS;
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f_vco = ( band == FC2580_UHF_BAND )? f_lo * 4 : (( band == FC2580_L_BAND )? f_lo * 2 : f_lo * 12);
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r_val = ( f_vco >= 2*76*freq_xtal )? 1 : ( f_vco >= 76*freq_xtal )? 2 : 4;
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f_comp = freq_xtal/r_val;
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n_val = ( f_vco / 2 ) / f_comp;
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f_diff = f_vco - 2* f_comp * n_val;
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f_diff_shifted = f_diff << ( 20 - pre_shift_bits );
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k_val = f_diff_shifted / ( ( 2* f_comp ) >> pre_shift_bits );
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if( f_diff_shifted - k_val * ( ( 2* f_comp ) >> pre_shift_bits ) >= ( f_comp >> pre_shift_bits ) )
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k_val = k_val + 1;
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if( f_vco >= BORDER_FREQ ) //Select VCO Band
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data_0x02 = data_0x02 | 0x08; //0x02[3] = 1;
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else
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data_0x02 = data_0x02 & 0xF7; //0x02[3] = 0;
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// if( band != curr_band ) {
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switch(band)
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{
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case FC2580_UHF_BAND:
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data_0x02 = (data_0x02 & 0x3F);
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result &= fc2580_i2c_write(pTuner, 0x25, 0xF0);
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result &= fc2580_i2c_write(pTuner, 0x27, 0x77);
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result &= fc2580_i2c_write(pTuner, 0x28, 0x53);
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result &= fc2580_i2c_write(pTuner, 0x29, 0x60);
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result &= fc2580_i2c_write(pTuner, 0x30, 0x09);
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result &= fc2580_i2c_write(pTuner, 0x50, 0x8C);
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result &= fc2580_i2c_write(pTuner, 0x53, 0x50);
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if( f_lo < 538000 )
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result &= fc2580_i2c_write(pTuner, 0x5F, 0x13);
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else
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result &= fc2580_i2c_write(pTuner, 0x5F, 0x15);
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if( f_lo < 538000 )
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{
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result &= fc2580_i2c_write(pTuner, 0x61, 0x07);
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result &= fc2580_i2c_write(pTuner, 0x62, 0x06);
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result &= fc2580_i2c_write(pTuner, 0x67, 0x06);
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result &= fc2580_i2c_write(pTuner, 0x68, 0x08);
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result &= fc2580_i2c_write(pTuner, 0x69, 0x10);
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result &= fc2580_i2c_write(pTuner, 0x6A, 0x12);
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}
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else if( f_lo < 794000 )
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{
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result &= fc2580_i2c_write(pTuner, 0x61, 0x03);
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result &= fc2580_i2c_write(pTuner, 0x62, 0x03);
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result &= fc2580_i2c_write(pTuner, 0x67, 0x03); //ACI improve
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result &= fc2580_i2c_write(pTuner, 0x68, 0x05); //ACI improve
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result &= fc2580_i2c_write(pTuner, 0x69, 0x0C);
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result &= fc2580_i2c_write(pTuner, 0x6A, 0x0E);
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}
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else
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{
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result &= fc2580_i2c_write(pTuner, 0x61, 0x07);
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result &= fc2580_i2c_write(pTuner, 0x62, 0x06);
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result &= fc2580_i2c_write(pTuner, 0x67, 0x07);
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result &= fc2580_i2c_write(pTuner, 0x68, 0x09);
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result &= fc2580_i2c_write(pTuner, 0x69, 0x10);
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result &= fc2580_i2c_write(pTuner, 0x6A, 0x12);
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}
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result &= fc2580_i2c_write(pTuner, 0x63, 0x15);
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result &= fc2580_i2c_write(pTuner, 0x6B, 0x0B);
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result &= fc2580_i2c_write(pTuner, 0x6C, 0x0C);
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result &= fc2580_i2c_write(pTuner, 0x6D, 0x78);
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result &= fc2580_i2c_write(pTuner, 0x6E, 0x32);
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result &= fc2580_i2c_write(pTuner, 0x6F, 0x14);
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result &= fc2580_set_filter(pTuner, 8, freq_xtal); //BW = 7.8MHz
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break;
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case FC2580_VHF_BAND:
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data_0x02 = (data_0x02 & 0x3F) | 0x80;
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result &= fc2580_i2c_write(pTuner, 0x27, 0x77);
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result &= fc2580_i2c_write(pTuner, 0x28, 0x33);
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result &= fc2580_i2c_write(pTuner, 0x29, 0x40);
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result &= fc2580_i2c_write(pTuner, 0x30, 0x09);
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result &= fc2580_i2c_write(pTuner, 0x50, 0x8C);
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result &= fc2580_i2c_write(pTuner, 0x53, 0x50);
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result &= fc2580_i2c_write(pTuner, 0x5F, 0x0F);
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result &= fc2580_i2c_write(pTuner, 0x61, 0x07);
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result &= fc2580_i2c_write(pTuner, 0x62, 0x00);
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result &= fc2580_i2c_write(pTuner, 0x63, 0x15);
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result &= fc2580_i2c_write(pTuner, 0x67, 0x03);
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result &= fc2580_i2c_write(pTuner, 0x68, 0x05);
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result &= fc2580_i2c_write(pTuner, 0x69, 0x10);
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result &= fc2580_i2c_write(pTuner, 0x6A, 0x12);
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result &= fc2580_i2c_write(pTuner, 0x6B, 0x08);
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result &= fc2580_i2c_write(pTuner, 0x6C, 0x0A);
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result &= fc2580_i2c_write(pTuner, 0x6D, 0x78);
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result &= fc2580_i2c_write(pTuner, 0x6E, 0x32);
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result &= fc2580_i2c_write(pTuner, 0x6F, 0x54);
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result &= fc2580_set_filter(pTuner, 7, freq_xtal); //BW = 6.8MHz
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break;
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case FC2580_L_BAND:
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data_0x02 = (data_0x02 & 0x3F) | 0x40;
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result &= fc2580_i2c_write(pTuner, 0x2B, 0x70);
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result &= fc2580_i2c_write(pTuner, 0x2C, 0x37);
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result &= fc2580_i2c_write(pTuner, 0x2D, 0xE7);
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result &= fc2580_i2c_write(pTuner, 0x30, 0x09);
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result &= fc2580_i2c_write(pTuner, 0x44, 0x20);
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result &= fc2580_i2c_write(pTuner, 0x50, 0x8C);
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result &= fc2580_i2c_write(pTuner, 0x53, 0x50);
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result &= fc2580_i2c_write(pTuner, 0x5F, 0x0F);
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result &= fc2580_i2c_write(pTuner, 0x61, 0x0F);
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result &= fc2580_i2c_write(pTuner, 0x62, 0x00);
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result &= fc2580_i2c_write(pTuner, 0x63, 0x13);
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result &= fc2580_i2c_write(pTuner, 0x67, 0x00);
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result &= fc2580_i2c_write(pTuner, 0x68, 0x02);
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result &= fc2580_i2c_write(pTuner, 0x69, 0x0C);
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result &= fc2580_i2c_write(pTuner, 0x6A, 0x0E);
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result &= fc2580_i2c_write(pTuner, 0x6B, 0x08);
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result &= fc2580_i2c_write(pTuner, 0x6C, 0x0A);
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result &= fc2580_i2c_write(pTuner, 0x6D, 0xA0);
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result &= fc2580_i2c_write(pTuner, 0x6E, 0x50);
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result &= fc2580_i2c_write(pTuner, 0x6F, 0x14);
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result &= fc2580_set_filter(pTuner, 1, freq_xtal); //BW = 1.53MHz
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break;
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default:
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break;
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}
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// curr_band = band;
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// }
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//A command about AGC clock's pre-divide ratio
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if( freq_xtal >= 28000 )
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result &= fc2580_i2c_write(pTuner, 0x4B, 0x22 );
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//Commands about VCO Band and PLL setting.
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result &= fc2580_i2c_write(pTuner, 0x02, data_0x02);
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data_0x18 = ( ( r_val == 1 )? 0x00 : ( ( r_val == 2 )? 0x10 : 0x20 ) ) + (unsigned char)(k_val >> 16);
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result &= fc2580_i2c_write(pTuner, 0x18, data_0x18); //Load 'R' value and high part of 'K' values
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result &= fc2580_i2c_write(pTuner, 0x1A, (unsigned char)( k_val >> 8 ) ); //Load middle part of 'K' value
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result &= fc2580_i2c_write(pTuner, 0x1B, (unsigned char)( k_val ) ); //Load lower part of 'K' value
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result &= fc2580_i2c_write(pTuner, 0x1C, (unsigned char)( n_val ) ); //Load 'N' value
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//A command about UHF LNA Load Cap
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if( band == FC2580_UHF_BAND )
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result &= fc2580_i2c_write(pTuner, 0x2D, ( f_lo <= (unsigned int)794000 )? 0x9F : 0x8F ); //LNA_OUT_CAP
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return result;
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}
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/*==============================================================================
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fc2580 filter BW setting
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This function is a generic function which gets called to change Bandwidth
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frequency of fc2580's channel selection filter
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<input parameter>
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freq_xtal: kHz
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filter_bw
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1 : 1.53MHz(TDMB)
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6 : 6MHz (Bandwidth 6MHz)
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7 : 6.8MHz (Bandwidth 7MHz)
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8 : 7.8MHz (Bandwidth 8MHz)
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==============================================================================*/
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fc2580_fci_result_type fc2580_set_filter( void *pTuner, unsigned char filter_bw, unsigned int freq_xtal )
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{
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unsigned char cal_mon = 0, i;
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fc2580_fci_result_type result = FC2580_FCI_SUCCESS;
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if(filter_bw == 1)
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{
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result &= fc2580_i2c_write(pTuner, 0x36, 0x1C);
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result &= fc2580_i2c_write(pTuner, 0x37, (unsigned char)(4151*freq_xtal/1000000) );
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result &= fc2580_i2c_write(pTuner, 0x39, 0x00);
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result &= fc2580_i2c_write(pTuner, 0x2E, 0x09);
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}
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if(filter_bw == 6)
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{
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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;
|
|
//
|
|
//}
|
|
|