/* Ported from:

** Source: /cvsroot/bluemsx/blueMSX/Src/IoDevice/MB89352.h,v

** Revision: 1.4

** Date: 2007/03/28 17:35:35

**

** More info: http://www.bluemsx.com

**

** Copyright (C) 2003-2007 Daniel Vik, white cat

*/

#ifndef MB89352_HH

#define MB89352_HH

#include "SCSI.hh"

#include "SCSIDevice.hh"

#include "AlignedBuffer.hh"

#include <array>

#include <memory>

namespace openmsx {

class DeviceConfig;

class MB89352

{

public:

	explicit MB89352(DeviceConfig& config);

	void reset(bool scsiReset);

	[[nodiscard]] uint8_t readRegister(uint8_t reg);

	[[nodiscard]] uint8_t peekRegister(uint8_t reg) const;

	[[nodiscard]] uint8_t readDREG();

	[[nodiscard]] uint8_t peekDREG() const;

	void writeRegister(uint8_t reg, uint8_t value);

	void writeDREG(uint8_t value);

	template<typename Archive>

	void serialize(Archive& ar, unsigned version);

private:

	void disconnect();

	void softReset();

	void setACKREQ(uint8_t& value);

	void resetACKREQ();

	[[nodiscard]] uint8_t getSSTS() const;

private:

	static constexpr unsigned MAX_DEV = 8;

	std::array<std::unique_ptr<SCSIDevice>, MAX_DEV> dev;

	AlignedByteArray<SCSIDevice::BUFFER_SIZE> buffer; // buffer for transfer

	unsigned cdbIdx;                // cdb index

	unsigned bufIdx;                // buffer index

	int msgin = 0;                  // Message In flag

	int counter;                    // read and written number of bytes

	                                // within the range in the buffer

	unsigned blockCounter = 0;      // Number of blocks outside buffer

	                                // (512bytes / block)

	int tc;                         // counter for hardware transfer

	SCSI::Phase phase;              //

	SCSI::Phase nextPhase = SCSI::Phase::UNDEFINED; // for message system

	uint8_t myId;                   // SPC SCSI ID 0..7

	uint8_t targetId = 0;           // SCSI Device target ID 0..7

	std::array<uint8_t, 16> regs;   // SPC register

	bool rst;                       // SCSI bus reset signal

	uint8_t atn;                    // SCSI bus attention signal

	bool isEnabled;                 // spc enable flag

	bool isBusy;                    // spc now working

	bool isTransfer;                // hardware transfer mode

	//TODO: bool devBusy;           // CD-ROM busy (buffer conflict prevention)

	std::array<uint8_t, 12> cdb;    // Command Descriptor Block

};

} // namespace openmsx

#endif