1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef __CSI_SLAVE_H__

    21 #define __CSI_SLAVE_H__

    22 

    23 #include <assp/naviengine/naviengine.h>

    24 #include <drivers/iic.h>

    25 #include <drivers/iic_channel.h>

    26 #ifdef MASTER_MODE

    27 #include "csi_master.h"

    28 #endif

    29 class DCsiChannelSlave: public DIicBusChannelSlave

    30 	{

    31 

    32 public:

    33 #ifdef STANDALONE_CHANNEL

    34 	IMPORT_C

    35 #endif

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

    37 					const TChannelDuplex aChanDuplex);

    38 	// Gateway function for PSL implementation

    39 	virtual TInt DoRequest(TInt aOperation);

    40 

    41 	DCsiChannelSlave(TInt aChannelNumber, const TBusType aBusType,

    42 	                 const TChannelDuplex aChanDuplex);

    43 

    44 protected:

    45 	// overriders for base pure-virtual methods..

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

    47 	virtual TInt CheckHdr(TDes8* aHdrBuff);

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

    49 

    50 private:

    51 	// some internal methods..

    52 	TBool TransConfigDiffersFromPrev();

    53 	TInt ConfigureInterface();

    54 	TInt InitTransfer();

    55 

    56 	// ISR handler and other static methods..

    57 	static void CsiIsr(TAny* aPtr);

    58 	static void TimeoutCallback(TAny* aPtr);

    59 	static inline void NotifyClientEnd(DCsiChannelSlave* aPtr);

    60 

    61 	// as implementation is common/generic for both channels

    62 	// store base register address and interruptID

    63 	TUint iChannelBase;

    64 	TInt iInterruptId;

    65 

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

    67 	TInt8 iSSPinActiveMode;

    68 	TUint8 iTrigger;

    69 

    70 	// granularity..

    71 	TInt8 iWordSize;

    72 

    73 	// flags indicating transmission/operation competition

    74 	TInt8 iInProgress;

    75 

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

    77 	TInt8 *iTxData;

    78 	TInt8 *iRxData;

    79 	TInt8 *iTxDataEnd;

    80 	TInt8 *iRxDataEnd;

    81 

    82 	// Timer to guard 'while' loops..

    83 	NTimer iHwGuardTimer;

    84 	// guard-timer timeout value (in ms)

    85 	TInt32 iHwTimeoutValue;

    86 

    87 	// status of the transaction

    88 	volatile TInt iTransactionStatus;

    89 

    90 #ifdef MASTER_MODE

    91 public:

    92 	DCsiChannelMaster *iMasterAddress;

    93 #endif

    94 	};

    95 

    96 

    97 

    98 #endif /*__CSI_SLAVE_H__*/