/*
 * $Id:$
 */
#ifndef __ide_h__
#define __ide_h__

#include "io.h"

struct Ide
{
	Relative<U8 ,0,Io<U8>  > data8;
	Relative<U16,0,Io<U16> > data16;
	Relative<U8 ,1,Io<U8>  > errorCode;
	Relative<U8 ,1,Io<U8>  > features;
	Relative<U8 ,2,Io<U8>  > sectorCount;
	Relative<U8 ,3,Io<U8>  > sectorNumber;
	Relative<U8 ,4,Io<U8>  > cylinderLow;
	Relative<U8 ,5,Io<U8>  > cylinderHigh;
	Relative<U8 ,6,Io<U8>  > driveHead;
	Relative<U8 ,7,Io<U8>  > status;
	Relative<U8 ,7,Io<U8>  > command;

	Relative<U8 ,0x206,Io<U8>  > altStatus;
	Relative<U8 ,0x206,Io<U8>  > deviceCtrl;
	Relative<U8 ,0x207,Io<U8>  > driveAddress;

	inline void sectorNumber32(unsigned v)
	{
		sectorNumber=v;
		cylinderLow=v>>8;
		cylinderHigh=v>>16;
		driveHead=0xe0|(v>>24);
	};

	/* commands*/
	static const U8 READ_SECT     =0x20;
	static const U8 WRITE_SECT    =0x30;
	static const U8 SEEK          =0x70;
	static const U8 EXEC_DIAG     =0x90;
	static const U8 INIT_DEV_PARAM=0x91;
	static const U8 SMART         =0xB0;
	static const U8 READ_DMA      =0xC8;
	static const U8 WRITE_DMA     =0xCA;
	static const U8 CHECK_MODE    =0xE5;
	static const U8 IDLE          =0xE1;
	static const U8 IDLE_IMMEDIATE=0xE7;
	static const U8 FLUSH_CACHE   =0xE7;
	static const U8 IDENTIFY      =0xEC;
	static const U8 IDENTIFY_DMA  =0xEE;
	static const U8 SET_FEATURES  =0xEF;
	static const U8 READ_MAXLBA   =0xF8;

	static const U8 featureCacheEnable=0x02;
	static const U8 featureCacheDisable=0x82;
	static const U8 featureXferMode=0x03;
	static const U8 featureAddressOffsetModeEnable=0x09;
	static const U8 AdvancedPowerManagementDisable=0x85;

	static const U8 ultraDmaMode=0x40;

	enum statusBits
	{
		busy=0x80,
		ready=0x40,
		fault=0x20,
		seekComplete=0x10,
		dataRequest=0x08,
		correctData=0x04,
		index=0x02,
		error=0x01
	};

	inline bool diskReady()
	{
		return (altStatus & (ready|busy)) == ready;
	}

	inline bool dataRequested()
	{
		return (altStatus & (dataRequest|busy)) == dataRequest;
	}

	inline bool pb()
	{
		return (altStatus & (error)) == error;
	}

	bool waitReady(int dcnt);

	void init();
	inline void reset()
	{
		int dcnt=10;
		deviceCtrl=0x04;
		while(dcnt--)
		{
			U8 c;
			c=altStatus;
		}
		deviceCtrl=0;
	}

	bool verify(char *s=0);

	bool genericSet (U8 *req);
	bool genericGet (U8 *req);
	bool genericTo  (U8 *req,U8*buf,U32 len);
	bool genericFrom(U8 *req,U8*buf,U32 len);
	U32 read(U32 sector,U32 qt,U16 *buf);
	U32 write(U32 sector,U32 qt,U16 *buf);
	bool seek(U32 sector);
	bool idle(U32 quintupleSec);
	bool idleImmediate();
#if 0
	bool smart(int subCmd,int param=0,U16 *data=NULL,U16 *status=NULL);
#endif
	bool identify(U8 *buf,int len);
};

#define ide ((Ide* )0x1f0)


#endif /* __ide_h__ */
/*
 * $Log:$
 */