/*
 * floppy.h
 *
 *  Created on: Aug 20, 2011
 *      Author: Tiberiu
 */

#ifndef FLOPPY_H_
#define FLOPPY_H_

#include <types.h>

enum FloppyRegisters
{
	FloppyRegisterStatusA                = 0x3F0, // read-only
	FloppyRegisterStatusB                = 0x3F1, // read-only
	FloppyRegisterDigitalOutput          = 0x3F2,
	FloppyRegisterTapeDrive              = 0x3F3,
	FloppyRegisterMainStatus             = 0x3F4, // read-only
	FloppyRegisterDatarateSelect         = 0x3F4, // write-only
	FloppyRegisterFIFO               	 = 0x3F5,
	FloppyRegisterDigitalInput			 = 0x3F7, // read-only
	FloppyRegisterConfigurationControl	 = 0x3F7  // write-only
};

enum FloppyCommands
{
   FloppyCommandReadTrack 					= 2,	// generates IRQ6
   FloppyCommandSpecify						= 3,	// * set drive parameters
   FloppyCommandSenseDriveStatus 			= 4,
   FloppyCommandWriteData					= 5,	// * write to the disk
   FloppyCommandReadData					= 6,	// * read from the disk
   FloppyCommandRecalibrate					= 7,	// * seek to cylinder 0
   FloppyCommandSenseInterrupt				= 8,	// * ack IRQ6, get status of last command
   FloppyCommandWriteDeletedData			= 9,
   FloppyCommandReadID						= 10,	// generates IRQ6
   FloppyCommandReadDeletedData				= 12,
   FloppyCommandFormatTrack					= 13,	// *
   FloppyCommandSeek						= 15,	// * seek both heads to cylinder X
   FloppyCommandVersion						= 16,	// * used during initialization, once
   FloppyCommandScanEqual					= 17,
   FloppyCommandPerpendicularMode			= 18,	// * used during initialization, once, maybe
   FloppyCommandConfigure					= 19,	// * set controller parameters
   FloppyCommandLock						= 20,	// * protect controller params from a reset
   FloppyCommandVerify						= 22,
   FloppyCommandScanLowOrEqual				= 25,
   FloppyCommandScanHighOrEqual				= 29,

   FloppyModeMultitrack 					= 0x80,
   FloppyModeMagneticEncoding				= 0x40,	// always set for read/write/verify/format
   FloppyModeSkip							= 0x20
};

enum FloppyMSRMasks
{
	FloppyMsrRQM	= 0x80,
	FloppyMsrDIO	= 0x40,
	FloppyMsrNDMA	= 0x20,
	FloppyMsrBusy	= 0x10
};

typedef struct {
        uint32 Size, SectorsPerTrack, Heads, Tracks;
        uint8 Gap, DataRate, Spec1, SRT, HLT, HUT;
        uint32 Spinup, Spindown, InterruptTimeout;
        string Name;
} FloppyType;

extern void FloppyInitialize();
extern void FloppyIrqHandler(_RegsStack32 *r);
extern void FloppyWaitIrq();
extern void FloppyInitDma();

extern void FloppyReset();
extern void FloppyConfigure();
extern void FloppySendCommand (uint8 command);
extern uint8 FloppyReadData ();
extern void FloppySenseInterrupt(uint8 *st0, uint8 *cyl);
extern void FloppySpecify (uint8 fd);
extern void FloppyMotor (uint8 fd_number, uint8 status);
extern void FloppySelectDrive(uint8 number);
extern void FloppyRecalibrate(uint8 fd_number);
extern void FloppyRW(uint8 isWrite, uint8 fd_number, uint8 head, uint8 cylinder, uint8 sector);
extern uint32 FloppyRead(uint8 drive, uint32 lba);

#endif /* FLOPPY_H_ */