// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// Provides utilities to build SCSI commands

// 

//

/**

 @file

 @internalTechnology

*/

#ifndef __SCSICMDBUILDER_H__

#define __SCSICMDBUILDER_H__

#include <e32std.h>

#include <f32file.h>

const TInt KScsiCmdMaxLen 	= 10;

const TInt KCbwLength       = 31;

const TInt KCswLength       = 13;

const TInt KKiloBytes		= 1024;

GLREF_D TBuf8<KScsiCmdMaxLen> scsiCmdBuf;

/**

 builds read/write SCSI command

 */

GLREF_C void BuildReadWrite(TInt aFlag, TInt aLogicalBlkAddr, TInt aTotalBlks);

/**

 Builds prevent/allow medium removal SCSI command

 @param aFlag: indicating if the command is to allow or prevent medium removal

 */ 

GLREF_C void BuildMediumRemoval(TInt aFlag);

/**

 Builds a test unit ready SCSI command

 */

GLREF_C void BuildTestUnitReady();

/**

 Builds a start/stop unit command

 @param aFlag: indicating if the command is to start or stop unit

 */ 

GLREF_C void BuildStartStopUnit(TInt aFlag);

/**

 Copy an int. Little endian

 @param dest the destination

 @param source the source

 */

GLREF_C void fillInt(TUint8* dest, TInt source);

/**

 Extracts an integer from a buffer. Assume little endian 

 */

GLREF_C TInt extractInt(const TUint8* aBuf);

/**

 Builds a CBW message

 @param aCbw:            stores CBW

 @param aDCBWTag:        a command block tag sent by the host. Used to associates a CSW

         				 with corresponding CBW

 @param aDataTranferLen: the number of bytes the host expects to transfer

 @param aInOutFlag:      value for bmCBWFlags field, indicating the direction of transfer

 @param aCBWCB:			 the actual command to be wrapped

 @param aTestLun:	 	 local unit number

 */

GLREF_C void createCBW(TDes8& aCbw, TInt aDCBWTag, TInt aDataTransferLen, TUint8 aInOutFlag, TDes8& aCBWCB, TUint8 aTestLun);

#endif // __SCSICMDBUILDER_H__