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 the License "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 #ifndef __IIC_SLAVE_H__

    20 #define __IIC_SLAVE_H__

    21 

    22 #include <drivers/iic_channel.h>

    23 

    24 class DIicBusChannelSlavePsl: public DIicBusChannelSlave

    25 	{

    26 

    27 public:

    28 	static DIicBusChannelSlavePsl* New(TInt aChannelNumber, const TBusType aBusType,

    29 	                              const TChannelDuplex aChanDuplex);

    30 

    31 	// Gateway function for PSL implementation

    32 	virtual TInt DoRequest(TInt aOperation);

    33 

    34 	DIicBusChannelSlavePsl(TInt aChannelNumber, const TBusType aBusType,

    35 	                 const TChannelDuplex aChanDuplex);

    36 

    37 private:

    38 	// Overriders for base class pure-virtual methods

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

    40 	virtual TInt CheckHdr(TDes8* aHdrBuff);

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

    42 

    43 	// Internal methods..

    44 	TBool TransConfigDiffersFromPrev();

    45 	TInt ConfigureInterface();

    46 	TInt AsynchConfigureInterface();

    47 	TInt InitTransfer();

    48 

    49 	// ISR handler and other static methods..

    50 	static void IicPslIsr(TAny* aPtr);

    51 	static void TimeoutCallback(TAny* aPtr);

    52 	static inline void NotifyClientEnd(DIicBusChannelSlavePsl* aPtr);

    53 

    54 	// Register base for the Master channel

    55 	TUint iSlaveChanBase;

    56 

    57 	// Interrupt ID for the Master channel

    58 	TInt iSlaveIntId;

    59 

    60 	// Bit mask of the transfer triggers managed by the channel

    61 	TUint8 iTrigger;

    62 

    63 	// Granularity, expressed as the number of bytes in a word

    64 	TInt8 iWordSize;

    65 

    66 	// Flag indicating transmission activity - optional, may not be required for all bus types

    67 	// In the template example it is used to indicate transitions on a chip-select line, such as for SPI.

    68 	TInt8 iInProgress;

    69 

    70 	// Dummy variable used merely to demonstrate the asynchronous channel capture mechanism

    71 	// See method AsynchConfigureInterface

    72 	TInt8 iAsyncConfig;

    73 

    74 	// Pointers to buffers used for Rx and Tx transfers

    75 	TInt8 *iTxData;

    76 	TInt8 *iRxData;

    77 	TInt8 *iTxDataEnd;

    78 	TInt8 *iRxDataEnd;

    79 

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

    81 	NTimer iHwGuardTimer;

    82 

    83 	// status of the transaction

    84 	volatile TInt iTransactionStatus;

    85 	};

    86 

    87 #endif /*__IIC_SLAVE_H__*/