/*

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

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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: 

*

*/

#ifndef __CSI_SLAVE_H__

#define __CSI_SLAVE_H__

#include <assp/naviengine/naviengine.h>

#include <drivers/iic.h>

#include <drivers/iic_channel.h>

#ifdef MASTER_MODE

#include "csi_master.h"

#endif

class DCsiChannelSlave: public DIicBusChannelSlave

	{

public:

#ifdef STANDALONE_CHANNEL

	IMPORT_C

#endif

	static DCsiChannelSlave* New(TInt aChannelNumber, const TBusType aBusType,

					const TChannelDuplex aChanDuplex);

	// Gateway function for PSL implementation

	virtual TInt DoRequest(TInt aOperation);

	DCsiChannelSlave(TInt aChannelNumber, const TBusType aBusType,

	                 const TChannelDuplex aChanDuplex);

protected:

	// overriders for base pure-virtual methods..

	virtual TInt DoCreate(); // second-stage construction,

	virtual TInt CheckHdr(TDes8* aHdrBuff);

	virtual void ProcessData(TInt aTrigger, TIicBusSlaveCallback* aCb);

private:

	// some internal methods..

	TBool TransConfigDiffersFromPrev();

	TInt ConfigureInterface();

	TInt InitTransfer();

	// ISR handler and other static methods..

	static void CsiIsr(TAny* aPtr);

	static void TimeoutCallback(TAny* aPtr);

	static inline void NotifyClientEnd(DCsiChannelSlave* aPtr);

	// as implementation is common/generic for both channels

	// store base register address and interruptID

	TUint iChannelBase;

	TInt iInterruptId;

	// to store SS pin active mode (1-active on high, 0 - active on low)

	TInt8 iSSPinActiveMode;

	TUint8 iTrigger;

	// granularity..

	TInt8 iWordSize;

	// flags indicating transmission/operation competition

	TInt8 iInProgress;

	// pointers to buffers used to transfer data from/to...

	TInt8 *iTxData;

	TInt8 *iRxData;

	TInt8 *iTxDataEnd;

	TInt8 *iRxDataEnd;

	// Timer to guard 'while' loops..

	NTimer iHwGuardTimer;

	// guard-timer timeout value (in ms)

	TInt32 iHwTimeoutValue;

	// status of the transaction

	volatile TInt iTransactionStatus;

#ifdef MASTER_MODE

public:

	DCsiChannelMaster *iMasterAddress;

#endif

	};

#endif /*__CSI_SLAVE_H__*/