author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 09:24:54 +0200 | |
changeset 43 | 96e5fb8b040d |
permissions | -rw-r--r-- |
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// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of the License "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// |
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/** |
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@file |
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@internalTechnology |
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*/ |
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#ifndef CSCSIPROTOCOL_H |
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#define CSCSIPROTOCOL_H |
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class CMassStorageFsm; |
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class TSbcClientInterface; |
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class RMediaChangeNotifier |
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{ |
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public: |
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RMediaChangeNotifier(); |
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~RMediaChangeNotifier(); |
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void Register(const RMessage2& aMessage); |
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void DoNotifyL(); |
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void DoCancelL(); |
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private: |
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void CompleteNotifierL(TInt); |
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private: |
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/** Notification service */ |
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RMessage2 iNotifier; |
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/** Flag to indicate that media change notification is active */ |
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TBool iRegistered; |
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}; |
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/** |
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SCSI Protocol procedures |
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*/ |
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class CScsiProtocol: public CBase, public MProtocol, public MBlockTransferProtocol |
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{ |
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public: |
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/** SCSI state */ |
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enum TScsiState |
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{ |
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EConnected, |
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EDisconnected |
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}; |
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static CScsiProtocol* NewL(TLun aLun, MTransport& aTransport); |
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~CScsiProtocol(); |
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private: |
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void ConstructL(TLun aLun); |
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CScsiProtocol(MTransport& aTransport); |
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public: |
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void InitialiseUnitL(); |
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// Stop unit command to uninitialise the lun |
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void UninitialiseUnitL(); |
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// Read command to read the media |
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void ReadL(TPos aPos, TDes8& aCopybuf, TInt aLen); |
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// Write command to write to the media |
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void WriteL(TPos aPos, TDesC8& aCopybuf, TInt aLen); |
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// ReadCapacity command to find the capacity of the media |
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void GetCapacityL(TCapsInfo& aCapsInfo); |
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// unit testing |
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void CreateSbcInterfaceL(TUint32 aBlockLen, TUint32 aLastLba); |
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void DoScsiReadyCheckEventL(); |
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void NotifyChange(const RMessage2& aMessage); |
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void ForceCompleteNotifyChangeL(); |
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void CancelChangeNotifierL(); |
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void CompleteNotifyChangeL(); |
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void SuspendL(); |
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void ResumeL(); |
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TBool IsConnected(); |
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// Supported Mass Storage commands |
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TInt MsInquiryL(); |
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TInt MsTestUnitReadyL(); |
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TInt MsStartStopUnitL(TBool aStart); |
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TInt MsPreventAllowMediaRemovalL(TBool aPrevent); |
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TInt MsReadCapacityL(); |
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TInt MsModeSense10L(); |
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TInt MsModeSense6L(); |
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TInt MsRequestSenseL(); |
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TBool MsIsSbcSet() const; |
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TBool MsIsRemovableMedia() const; |
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const TSenseInfo& MsSenseInfo() const; |
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// MBlockTransferProtocol interface |
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void BlockReadL(TPos aPos, TDes8& aBuf, TInt aLength); |
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void BlockWriteL(TPos aPos, TDesC8& aBuf, TUint aOffset, TInt aLength); |
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private: |
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void ResetSbc(); |
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void DoCheckConditionL(); |
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TInt GetSystemWideSenseError(const TSenseInfo& aSenseInfo); |
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TInt ProcessAsCodes(const TSenseInfo& aSenseInfo); |
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private: |
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/** State machine for device initialisation protocol */ |
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CMassStorageFsm* iFsm; |
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/** SCSI SPC interface methods */ |
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TSpcClientInterface iSpcInterface; |
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/** SCSI SBC interface methods */ |
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TSbcClientInterface* iSbcInterface; |
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// buffers for block manipulation (for use in iSbcInterface) |
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RBuf8 iHeadbuf; |
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RBuf8 iTailbuf; |
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// Logical Unit properties |
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/** LU removable */ |
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TBool iRemovableMedia; |
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/** LU write protected */ |
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TBool iWriteProtect; |
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/** Result of the last SCSI command */ |
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TSenseInfo iSenseInfo; |
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/** State of the LUN represented by this object */ |
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TScsiState iState; |
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/** Notifier for media changes */ |
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RMediaChangeNotifier iMediaChangeNotifier; |
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}; |
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/** |
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Returns the state of the SBC interface. INQUIRY command is used to detect if |
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device supports SBC and initialise the SBC interface. |
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@return TBool ETrue is SBC interface is initialised |
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*/ |
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inline TBool CScsiProtocol::MsIsSbcSet() const |
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{ |
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return iSbcInterface ? ETrue : EFalse; |
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} |
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/** |
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Returns the device removable property. MODE SENSE command is used to detect if |
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the device is removable. |
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@return TBool ETrue if device is removable |
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*/ |
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inline TBool CScsiProtocol::MsIsRemovableMedia() const |
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{ |
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return iRemovableMedia; |
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} |
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/** |
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Helper to return current SenseInfo. SCSI REQUEST SENSE command sets the sense |
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info. The protocol will retrieve device's sense info in the event of a SCSI |
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command error. |
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@return const TSenseInfo& |
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*/ |
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inline const TSenseInfo& CScsiProtocol::MsSenseInfo() const |
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{ |
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return iSenseInfo; |
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} |
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#endif // CSCSIPROTOCOL_H |