author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 07 Jan 2010 13:38:45 +0200 | |
changeset 10 | 36bfc973b146 |
parent 9 | 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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#include <f32fsys.h> |
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#include <e32property.h> |
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#include "hostusbmsproxy.h" |
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#include "hostusbmsfactory.h" |
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#include "debug.h" |
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CUsbHostMsProxyDriveFactory::CUsbHostMsProxyDriveFactory() |
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{ |
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__MSFNSLOG |
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} |
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CUsbHostMsProxyDriveFactory::~CUsbHostMsProxyDriveFactory() |
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{ |
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__MSFNSLOG |
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} |
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TInt CUsbHostMsProxyDriveFactory::Install() |
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{ |
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__MSFNSLOG |
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_LIT(KLoggerName,"usbhostms"); |
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return SetName(&KLoggerName); |
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} |
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TInt CUsbHostMsProxyDriveFactory::CreateProxyDrive(CProxyDrive*& aMountProxyDrive,CMountCB* aMount) |
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{ |
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__MSFNSLOG |
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aMountProxyDrive = new CUsbHostMsProxyDrive(aMount,this); |
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return (aMountProxyDrive==NULL) ? KErrNoMemory : KErrNone; |
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} |
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extern "C" { |
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/* |
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Create the proxy drive factory object for the usbhost mass storage proxy |
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*/ |
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EXPORT_C CExtProxyDriveFactory* CreateFileSystem() |
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{ |
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__MSFNSLOG |
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return new CUsbHostMsProxyDriveFactory(); |
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} |
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} |
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/* |
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This function will be called to kick off a speculative probe for USB mass storage devices. |
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This function issues an application session request (through publish and subscribe) to the USB manager. |
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Upon USB Manager receiving this application session request in consent with the USB watcher application, |
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the Bus request is passed to the OTG component to bringup the VBus, thus enumerating the mass storage |
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devices Upon enumerating the FDF will communicate with the Mount Manager which will allocate mass storage |
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drives for the logical units and continues drive access through the Usb host mass storage proxy drive. |
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|
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Ps: Note that the this request cant be handled by the MSC since, in the scenario where MSC is not running |
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initially, the request will try to create the process. Creation of process will involve the file server inturn |
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to load the MSC binary (.exe) to run. Since the RMessages are handled sequentially, the file server would not |
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be able to service the request until the AsyncEnuerate is completed. Where, the process creation will wait |
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for the rendezvous to complete creating the deadlock situation. Hence the application session request is handled |
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in the factory object itself! |
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*/ |
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void CUsbHostMsProxyDriveFactory::AsyncEnumerate() |
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{ |
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__MSFNSLOG |
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RProperty prop; |
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TInt ret; |
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|
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/* The property category is the USB manager */ |
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const TUid KUidUsbManCategory={0x101fe1db}; |
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/* The Key used is #6 for the Usb request session */ |
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const TInt KUsbRequestSessionProperty = 6; |
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|
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/* By this time the property should be available and allow us to get the handle. |
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If the property is not created (for some reason), we do not have anything to do */ |
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ret = prop.Attach(KUidUsbManCategory, KUsbRequestSessionProperty); |
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__PXYPRINT1(_L("Property attach returned %d"),ret); |
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if(ret == KErrNone) |
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{ |
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/* The Usb Manager does not evaluate the value passed through this property. |
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We pass 1 (an arbitary value) for completion */ |
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ret = prop.Set(KUidUsbManCategory, KUsbRequestSessionProperty, 1); |
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__PXYPRINT1(_L("Property set returned %d"),ret); |
96e5fb8b040d
Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
103 |
prop.Close(); |
96e5fb8b040d
Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
104 |
} |
96e5fb8b040d
Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
105 |
} |
96e5fb8b040d
Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
106 |