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// Copyright (c) 2007-2009 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 "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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// Implementaion of the media abstraction classs.
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//
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//
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/**
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@file
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*/
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#include "win_media.h"
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#include "win_media_device.h"
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//#########################################################################################################################
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//## CMediaBase abstract base class implementation
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//#########################################################################################################################
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CMediaBase::CMediaBase(TInt aEpocDrvNumber)
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:iEpocDrvNumber((TDriveNumber)aEpocDrvNumber), iReadOnly(0), ipDevice(NULL)
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{
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ASSERT(iEpocDrvNumber >= EDriveA && iEpocDrvNumber <= EDriveZ);
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ipSettingsManager = NULL;
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}
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CMediaBase::~CMediaBase()
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{
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Disconnect();
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delete ipDevice;
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delete ipSettingsManager;
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}
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/**
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This method is called in order to disconnect from the media (on dismount)
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*/
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void CMediaBase::Disconnect()
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{
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if(ipDevice)
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ipDevice->Disconnect();
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}
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//-----------------------------------------------------------------------------
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/**
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Get EPOC-style drive capabilities
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@param aCaps - some fields of this structure will be filled with the information from the WinMediaDevice
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@return standard EPOC code
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*/
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TInt CMediaBase::GetEpocCaps(TLocalDriveCaps& aCaps)
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{
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//-- get real drive geometry from the windows device we are using and
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//-- override the native media driver's data
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TDriveGeometry dg;
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ipDevice->GetDriveGeometry(dg);
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aCaps.iSize = dg.TotalSizeInBytes();
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//-- here we can also override other information, like drive and media attributes etc..
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//-- media type
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TUint32 val = ipSettingsManager->TMediaType_Override();
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if(val)
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aCaps.iType = (TMediaType)val;
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//-- media attributes
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TUint32 andMask, orMask;
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ipSettingsManager->MediaAtt_OverrideMasks(andMask, orMask);
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aCaps.iMediaAtt &= andMask;
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aCaps.iMediaAtt |= orMask;
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//-- drive attributes
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ipSettingsManager->DriveAtt_OverrideMasks(andMask, orMask);
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aCaps.iDriveAtt &= andMask;
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aCaps.iDriveAtt |= orMask;
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return KErrNone;
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}
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//#########################################################################################################################
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//## CGenericBlockMedia class implementation
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//#########################################################################################################################
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CGenericBlockMedia::CGenericBlockMedia(TInt aEpocDrvNumber)
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:CMediaBase(aEpocDrvNumber)
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{
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}
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CGenericBlockMedia::~CGenericBlockMedia()
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{
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}
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//-----------------------------------------------------------------------------
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/**
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Connect to the media, i.e. do mounting job.
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Read settings from the ini file, instantiate "windows device" class..
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*/
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TInt CGenericBlockMedia::Connect()
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{
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__LOG1(_L("#-- CGenericBlockMedia::Connect(), epocDrv:%d"), iEpocDrvNumber);
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if(ipDevice)
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{
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ASSERT(0);
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return KErrInUse;
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}
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//-- initialise an object to work with settings from ini file
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if(!ipSettingsManager)
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{
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ipSettingsManager = TSettingsManager::Create(iEpocDrvNumber);
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if(!ipSettingsManager)
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{
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__LOG(_L("#-- Can not create TSettingsManager!"));
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return KErrGeneral;
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}
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}
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//-- 1. obtain and process windows device name
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char szDevName[KMaxFileName];
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Settings().WinDeviceName(szDevName, sizeof(szDevName));
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if(strlen(szDevName) < 4)
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{
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__LOG(_L("#-- CGenericBlockMedia::Connect() Bad device name!"));
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__LOGF(szDevName);
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return KErrBadName;
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}
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//-- 1.1 find out if it is the physical volume or image file
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TBool bImageFile = ETrue;
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const char szDevPrefix[] = "\\\\.\\";
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if( memcmp(szDevName, szDevPrefix, strlen(szDevPrefix)) == 0)
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{//-- this is a physical device
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bImageFile = EFalse;
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}
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//-- 2. instantinate an interface to the Windows media device
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TInt nRes;
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if(bImageFile)
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{//-- device name corresponds to the image file
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ipDevice = new CWinImgFileDevice;
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}
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else
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{//-- device name corresponds to the physical volume file
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ipDevice = new CWinVolumeDevice;
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}
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ASSERT(ipDevice);
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//-- 3. other parameters
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iReadOnly = Settings().IsReadOnly();
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//-- set and validate parameters
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TMediaDeviceParams connectParams;
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const TUint32 bps = Settings().MediaSectorSize();
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if(bps > 0)
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{//-- some value is provided in the ini file.
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if(!IsPowerOf2(bps) || bps < KDefaultSectorSz || bps > 4096)
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{
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__LOG1(_L("#-- 'BytesPerSector' value is incorrect! :%d"), bps);
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return KErrArgument;
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}
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}
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connectParams.iDrvGeometry.iBytesPerSector = bps;
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//-- !!! chech size here!!
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connectParams.iDrvGeometry.iSizeInSectors = Settings().MediaSizeInSectors();
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connectParams.ipDevName = szDevName;
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connectParams.iReadOnly = iReadOnly;
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//-- connect to the device driver
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nRes = ipDevice->Connect(connectParams);
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return nRes;
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}
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//-----------------------------------------------------------------------------
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/**
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Disconnect from the media, dismounting.
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*/
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void CGenericBlockMedia::Disconnect()
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{
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__PRINT1(_L("#-- CGenericBlockMedia::Disconnect(), epocDrv:%d"), iEpocDrvNumber);
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ASSERT(ipDevice);
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CMediaBase::Disconnect();
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}
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//-----------------------------------------------------------------------------
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/**
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Read from the media. See corresponding CWinDrvProxyDrive:: method
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*/
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TInt CGenericBlockMedia::Read(TInt64 aPos, TInt aLength, TDes8& aDataDes)
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{
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//__PRINT3(_L("#-- CGenericBlockMedia::Read(), epocDrv:%d, pos:%LU, len:%u"), iEpocDrvNumber, aPos, aLength);
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ASSERT(ipDevice);
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return ipDevice->Read(aPos, aLength, aDataDes);
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}
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//-----------------------------------------------------------------------------
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/**
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Write to the media. See corresponding CWinDrvProxyDrive:: method
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*/
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TInt CGenericBlockMedia::Write(TInt64 aPos,TInt aLength, const TDesC8& aDataDes)
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{
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//__PRINT3(_L("#-- CGenericBlockMedia::Write(), epocDrv:%d, pos:%LU, len:%u"), iEpocDrvNumber, aPos, aLength);
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ASSERT(ipDevice);
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if(iReadOnly)
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return KErrAccessDenied;
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return ipDevice->Write(aPos, aLength, aDataDes);
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}
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//-----------------------------------------------------------------------------
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/**
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Format the media.
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For "formatting" called CWinMediaDeviceBase::Erase(...) method that fills required media region with zeroes (see its implementation).
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As soon as the number of erased sectors becomes >= max. number of sectors on this media, KErrEof is reurned indicationg the last
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formatting step done.
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*/
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TInt CGenericBlockMedia::Format(TFormatInfo& anInfo)
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{
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if(iReadOnly)
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return KErrAccessDenied;
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TInt nRes;
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const TUint32 KMaxFmtSteps = 100; //-- max. number of formatting steps.
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TDriveGeometry dg;
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ipDevice->GetDriveGeometry(dg);
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const TUint32 KFmtSectors = (dg.iSizeInSectors + (KMaxFmtSteps-1))/ KMaxFmtSteps; //-- how many sectors format during one step
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if(anInfo.iFormatIsCurrent == 0)
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{//-- this is a first entry, prepare format data
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iSectorsFormatted = 0;
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anInfo.iFormatIsCurrent = 1;
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}
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//-- erase block of the media
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TUint32 sectorsToErase = KFmtSectors;
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if(iSectorsFormatted+KFmtSectors > dg.iSizeInSectors)
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{
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sectorsToErase -= (iSectorsFormatted+KFmtSectors-dg.iSizeInSectors);
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}
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nRes = ipDevice->Erase(iSectorsFormatted*dg.iBytesPerSector, sectorsToErase*dg.iBytesPerSector, 0);
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if(nRes != KErrNone)
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{
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ASSERT(0);
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return nRes;
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}
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iSectorsFormatted+=KFmtSectors;
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anInfo.i512ByteSectorsFormatted = iSectorsFormatted;
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if(iSectorsFormatted >= dg.iSizeInSectors)
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return KErrEof; //-- formatted has finished
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return KErrNone;
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}
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//-----------------------------------------------------------------------------
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/**
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"format" the specified region on the media. See corresponding CWinDrvProxyDrive:: method.
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*/
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TInt CGenericBlockMedia::Format(TInt64 aPos, TInt aLength)
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{
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TInt nRes = ipDevice->Erase(aPos, aLength, 0);
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return nRes; //-- shall it be KErrEof ?
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}
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