Spi_Codec.h

/*
 * Spi_Codec.h
 *
 * @brief Used for configuration of AD1938 codec for CTAG face2|4 Audio Card via spi-gpio
 *
 * Copyright (C) 2017 Henrik Langer henni19790@googlemail.com
 */

#ifndef SPI_CODEC_H_
#define SPI_CODEC_H_

#include "AudioCodec.h"
#include <cstdlib>

#define REG_PLL_CLK_CONTROL_0   0
#define REG_PLL_CLK_CONTROL_1   1
#define REG_DAC_CONTROL_0               2
#define REG_DAC_CONTROL_1               3
#define REG_DAC_CONTROL_2               4
#define REG_DAC_CHANNEL_MUTES   5
#define REG_DAC_VOLUME_L1               6
#define REG_DAC_VOLUME_R1               7
#define REG_DAC_VOLUME_L2               8
#define REG_DAC_VOLUME_R2               9
#define REG_DAC_VOLUME_L3               10
#define REG_DAC_VOLUME_R3               11
#define REG_DAC_VOLUME_L4               12
#define REG_DAC_VOLUME_R4               13
#define REG_ADC_CONTROL_0               14
#define REG_ADC_CONTROL_1               15
#define REG_ADC_CONTROL_2               16

class Spi_Codec : public AudioCodec {

public:
        enum CODEC_TYPE {
                MASTER_CODEC,
                SLAVE_CODEC
        };

        Spi_Codec(const char* spidev_gpio_cs0, const char* spidev_gpio_cs1, bool isVerbose = false);
        ~Spi_Codec();

        int writeRegister(unsigned char reg, unsigned char value, CODEC_TYPE codec = MASTER_CODEC);
        unsigned char readRegister(unsigned char reg, CODEC_TYPE codec = MASTER_CODEC);

        int initCodec();
        int startAudio(int shouldBeReady);
        int stopAudio();
        unsigned int getNumIns();
        unsigned int getNumOuts();
        float getSampleRate();
        int dumpRegisters();
        int reset(); // Hard reset of codec(s)
        bool masterIsDetected(); // CTAG face2|4
        bool slaveIsDetected();  // CTAG Beast
        int setLineOutVolume(int channel, float gain);
        int setHpVolume(int channel, float gain) { return 0; };
        int setInputGain(int channel, float newGain) { return 0; };
        int disable() {return 0;};
        McaspConfig& getMcaspConfig();

private:
        int _fd_master, _fd_slave;
        std::vector<int> _dacVolumethreeEighthsDbs;
        int _writeDACVolumeRegisters(bool mute);
        int _spiTransfer(unsigned char* tx_buf, unsigned char* rx_buf, size_t bytes, CODEC_TYPE codec = MASTER_CODEC);
        McaspConfig mcaspConfig;
        bool _isBeast = false;
        bool _verbose;
        bool _shouldPinmux;
};

#endif /* SPI_CODEC_H_ */