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// Copyright (c) 2007-2010 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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// Description:
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// Symbian USBDI Descriptors Parsing Routines.
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//
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//
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/**
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@file
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@publishedPartner
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*/
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#include <d32usbdescriptors.h>
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#include "usbdescutils.h"
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// ----------------
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// TUsbGenericDescriptor
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// ----------------
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EXPORT_C TUsbGenericDescriptor::TUsbGenericDescriptor()
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: iRecognisedAndParsed(EUnrecognised)
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, iNextPeer(NULL)
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, iFirstChild(NULL)
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, iParent(NULL)
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{
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}
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/**
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Deletes all child and peer descriptors. Does not delete this descriptor, the caller is responsible for
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doing this separately.
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*/
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EXPORT_C void TUsbGenericDescriptor::DestroyTree()
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{
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// Store the tree pointers
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TUsbGenericDescriptor* child = this->iFirstChild;
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TUsbGenericDescriptor* peer = this->iNextPeer;
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// Now we chop off the tree from the root node, by doing this
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// we don't need to NULL pointers as we go down (which makes
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// the iterative algorithm more efficient).
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this->iFirstChild = NULL;
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this->iNextPeer = NULL;
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// Now we walk and destroy the tree from the two pointers
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// we have
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WalkAndDelete(child);
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WalkAndDelete(peer);
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}
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void TUsbGenericDescriptor::WalkAndDelete(TUsbGenericDescriptor* aDesc)
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{
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if(!aDesc)
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{
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return;
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}
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TUsbGenericDescriptor* topLevel = aDesc->iParent;
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do
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{
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if(aDesc->iFirstChild)
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{
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// walk down the tree depth first.
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aDesc = aDesc->iFirstChild;
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}
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else if(aDesc->iNextPeer)
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{
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// Walk along each peer at the "bottom"
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TUsbGenericDescriptor* peer = aDesc->iNextPeer;
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delete aDesc;
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aDesc = peer;
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}
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else
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{
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// End of bottom tier, so we go back up to the parent
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// and null the first child pointer so we don't go back
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// down again.
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TUsbGenericDescriptor* parent = aDesc->iParent;
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delete aDesc;
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aDesc = parent;
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if(aDesc)
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{
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aDesc->iFirstChild = NULL;
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}
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// if we have gone up to the top level for destruction then we don't
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// do anymore.
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if(aDesc == topLevel)
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{
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break;
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}
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}
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}
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while(aDesc);
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}
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/**
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Utility method to retrieve a TUint8 value from a given offset in the descriptor.
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@param aOffset The offset in the binary blob at which to retrieve the value.
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@return The value from the descriptor.
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*/
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EXPORT_C TUint8 TUsbGenericDescriptor::TUint8At(TInt aOffset) const
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{
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return ParseTUint8(iBlob, aOffset);
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}
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/**
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Utility method to retrieve a TUint16 value from a given offset in the descriptor.
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@param aOffset The offset in the binary blob at which to retrieve the value.
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@return The value from the descriptor.
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*/
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EXPORT_C TUint16 TUsbGenericDescriptor::TUint16At(TInt aOffset) const
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{
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return ParseTUint16(iBlob, aOffset);
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}
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/**
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Utility method to retrieve a TUint32 value from a given offset in the descriptor.
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@param aOffset The offset in the binary blob at which to retrieve the value.
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@return The value from the descriptor.
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*/
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EXPORT_C TUint32 TUsbGenericDescriptor::TUint32At(TInt aOffset) const
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{
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return ParseTUint32(iBlob, aOffset);
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}
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/**
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Assignment operator to fill in the TUsbGenericDescriptor fields from a TUsbGenericDescriptor.
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Note that if a TUsbGenericDescriptor derived class has additional member fields then
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they should define a specialised assignment overload for that type.
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*/
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EXPORT_C TUsbGenericDescriptor& TUsbGenericDescriptor::operator=(const TUsbGenericDescriptor& aDescriptor)
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{
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ibLength = aDescriptor.ibLength;
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ibDescriptorType = aDescriptor.ibDescriptorType;
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iRecognisedAndParsed = aDescriptor.iRecognisedAndParsed;
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iNextPeer = aDescriptor.iNextPeer;
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iFirstChild = aDescriptor.iFirstChild;
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iParent = aDescriptor.iParent;
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iBlob.Set(aDescriptor.iBlob);
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return *this;
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}
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/**
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This function determines whether the given USB descriptor is a parent
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of the descriptor the method is called on. The implementation may be
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specialised for each type of descriptor to ensure the tree is correctly
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built up.
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@param aPotentialRelative The USB descriptor that is being queried to see if it is a parent or peer.
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@return TBool Efalse if the given USB descriptor is a parent of this USB descriptor, ETrue if a peer of this descriptor
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*/
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/*virtual*/ TBool TUsbGenericDescriptor::IsParent(TUsbGenericDescriptor& aPotentialParent)
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{
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// As generic descriptors we consider all other "unknown" descriptors as peers, and
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// all "known" descriptors as parents of the descriptor.
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switch(aPotentialParent.ibDescriptorType)
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{
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case EDevice:
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case EConfiguration:
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case EString:
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case EInterface:
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case EEndpoint:
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case EDeviceQualifier:
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case EOtherSpeedConfiguration:
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case EInterfacePower:
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case EOTG:
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case EDebug:
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case EInterfaceAssociation:
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return ETrue;
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default:
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return EFalse;
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}
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}
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/**
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This function determines whether the given USB descriptor is a peer
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of the descriptor the method is called on. The implementation may be
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specialised for each type of descriptor to ensure the tree is correctly
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built up.
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@param aPotentialPeer The USB descriptor that is being queried to see if it is a peer.
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@return TBool EFalse if the given USB descriptor is a parent of this USB descriptor, ETrue if a peer of this descriptor
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*/
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/*virtual*/ TBool TUsbGenericDescriptor::IsPeer(TUsbGenericDescriptor& /*aPotentialPeer*/)
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{
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// As generic descriptors we are very permissive in binding peers.
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return ETrue;
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}
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/**
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This function determines whether the given USB descriptor is a child
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of the descriptor the method is called on. The implementation may be
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specialised for each type of descriptor to ensure the tree is correctly
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built up.
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@param aPotentialChild The USB descriptor that is being queried to see if it is a child.
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@return TBool ETrue if the given USB descriptor is a child of this USB descriptor, ETrue if a peer of this descriptor
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*/
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/*virtual*/ TBool TUsbGenericDescriptor::IsChild(TUsbGenericDescriptor& /*aPotentialChild*/)
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{
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// We just use the logic in the IsParent.
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return EFalse;
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}
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/**
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Ensures no memory is leaked if an owned TUsbGenericDescriptor is no longer needed.
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@param aPtr The TUsbGenericDescriptor that is to be cleaned up.
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@internalComponent
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*/
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EXPORT_C /*static*/ void TUsbGenericDescriptor::Cleanup(TAny* aPtr)
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{
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TUsbGenericDescriptor* ptr = static_cast<TUsbGenericDescriptor*>(aPtr);
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ptr->DestroyTree(); // belt and braces really.
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delete ptr;
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}
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// ----------------------
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// TUsbDeviceDescriptor
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// See section 9.6.1 of the USB 2.0 specification.
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// ----------------------
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EXPORT_C TUsbDeviceDescriptor::TUsbDeviceDescriptor()
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{
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}
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EXPORT_C /*static*/ TUsbDeviceDescriptor* TUsbDeviceDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
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{
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TUsbDeviceDescriptor* ret = NULL;
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// Only cast if correctly indentified as device descriptor
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if( aOriginal &&
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aOriginal->ibDescriptorType == EDevice &&
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aOriginal->ibLength == TUsbDeviceDescriptor::KSizeInOctets &&
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aOriginal->iRecognisedAndParsed == ERecognised)
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{
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ret = static_cast<TUsbDeviceDescriptor*>(aOriginal);
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}
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return ret;
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}
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EXPORT_C TUint16 TUsbDeviceDescriptor::USBBcd() const
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{
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return ParseTUint16(iBlob, EbcdUSB);
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}
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EXPORT_C TUint8 TUsbDeviceDescriptor::DeviceClass() const
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{
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return ParseTUint8(iBlob, EbDeviceClass);
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}
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EXPORT_C TUint8 TUsbDeviceDescriptor::DeviceSubClass() const
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{
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return ParseTUint8(iBlob, EbDeviceSubClass);
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}
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EXPORT_C TUint8 TUsbDeviceDescriptor::DeviceProtocol() const
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{
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return ParseTUint8(iBlob, EbDeviceProtocol);
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}
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EXPORT_C TUint8 TUsbDeviceDescriptor::MaxPacketSize0() const
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{
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return ParseTUint8(iBlob, EbMaxPacketSize0);
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}
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EXPORT_C TUint16 TUsbDeviceDescriptor::VendorId() const
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{
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return ParseTUint16(iBlob, EidVendor);
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}
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EXPORT_C TUint16 TUsbDeviceDescriptor::ProductId() const
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{
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return ParseTUint16(iBlob, EidProduct);
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}
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EXPORT_C TUint16 TUsbDeviceDescriptor::DeviceBcd() const
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{
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return ParseTUint16(iBlob, EbcdDevice);
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}
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EXPORT_C TUint8 TUsbDeviceDescriptor::ManufacturerIndex() const
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{
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return ParseTUint8(iBlob, EiManufacturer);
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}
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EXPORT_C TUint8 TUsbDeviceDescriptor::ProductIndex() const
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{
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return ParseTUint8(iBlob, EiProduct);
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}
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EXPORT_C TUint8 TUsbDeviceDescriptor::SerialNumberIndex() const
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{
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return ParseTUint8(iBlob, EiSerialNumber);
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}
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EXPORT_C TUint8 TUsbDeviceDescriptor::NumConfigurations() const
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{
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return ParseTUint8(iBlob, EbNumConfigurations);
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}
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/**
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The parsing routine for device descriptors.
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Here the previous descriptor parameter is ignored - because logically a device descriptor can be neither a peer
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nor a child.
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@internalComponent
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*/
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/*static*/ TUsbDeviceDescriptor* TUsbDeviceDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* aPreviousDesc)
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{
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TUsbDeviceDescriptor* devDes = NULL;
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const TInt KMinDeviceDesDecisionLength = 2;
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if( aUsbDes.Length() >= KMinDeviceDesDecisionLength &&
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aUsbDes[KbDescriptorTypeOffset] == EDevice &&
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aUsbDes[KbLengthOffset] == TUsbDeviceDescriptor::KSizeInOctets)
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{
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// Robustness check - check the length field is valid, and that we have enough data.
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if(aUsbDes.Length() < TUsbDeviceDescriptor::KSizeInOctets)
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{
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User::Leave(KErrCorrupt);
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}
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// Robustness check - check that the device descriptor is the first to be parsed.
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if(aPreviousDesc)
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{
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User::Leave(KErrCorrupt);
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}
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// Looks ok to be a device descriptor.
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devDes = new(ELeave) TUsbDeviceDescriptor;
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// Set the standard fields
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devDes->ibLength = TUsbDeviceDescriptor::KSizeInOctets;
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devDes->ibDescriptorType = EDevice;
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// Set the blob appropriately
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devDes->iBlob.Set(aUsbDes.Left(TUsbDeviceDescriptor::KSizeInOctets));
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devDes->iRecognisedAndParsed = ERecognised;
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// Update the data-left-to-parse Symbian descriptor
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aUsbDes.Set(aUsbDes.Mid(TUsbDeviceDescriptor::KSizeInOctets));
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}
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return devDes;
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}
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/**
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@internalComponent
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*/
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/*virtual*/ TBool TUsbDeviceDescriptor::IsParent(TUsbGenericDescriptor& /*aPotentialParent*/)
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{
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// The device descriptor should only come by itself in a bundle, so must be top-level.
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return EFalse;
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}
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/**
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@internalComponent
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*/
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/*virtual*/ TBool TUsbDeviceDescriptor::IsPeer(TUsbGenericDescriptor& /*aPotentialPeer*/)
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{
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// The device descriptor should only come by itself in a bundle, so no other peers.
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return EFalse;
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}
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// ------------------------------
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// TUsbDeviceQualifierDescriptor
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373 |
// See section 9.6.2 of the USB 2.0 specification.
|
|
|
374 |
// ------------------------------
|
|
|
375 |
|
|
|
376 |
EXPORT_C TUsbDeviceQualifierDescriptor::TUsbDeviceQualifierDescriptor()
|
|
|
377 |
{
|
|
|
378 |
}
|
|
|
379 |
|
|
|
380 |
EXPORT_C /*static*/ TUsbDeviceQualifierDescriptor* TUsbDeviceQualifierDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
|
|
|
381 |
{
|
|
|
382 |
TUsbDeviceQualifierDescriptor* ret = NULL;
|
|
|
383 |
// Only cast if correctly indentified as device qualifier descriptor
|
|
|
384 |
if( aOriginal &&
|
|
|
385 |
aOriginal->ibDescriptorType == EDeviceQualifier &&
|
|
|
386 |
aOriginal->ibLength == TUsbDeviceQualifierDescriptor::KSizeInOctets &&
|
|
|
387 |
aOriginal->iRecognisedAndParsed == ERecognised)
|
|
|
388 |
{
|
|
|
389 |
ret = static_cast<TUsbDeviceQualifierDescriptor*>(aOriginal);
|
|
|
390 |
}
|
|
|
391 |
return ret;
|
|
|
392 |
}
|
|
|
393 |
|
|
|
394 |
EXPORT_C TUint16 TUsbDeviceQualifierDescriptor::USBBcd() const
|
|
|
395 |
{
|
|
|
396 |
return ParseTUint16(iBlob, EbcdUSB);
|
|
|
397 |
}
|
|
|
398 |
|
|
|
399 |
EXPORT_C TUint8 TUsbDeviceQualifierDescriptor::DeviceClass() const
|
|
|
400 |
{
|
|
|
401 |
return ParseTUint8(iBlob, EbDeviceClass);
|
|
|
402 |
}
|
|
|
403 |
|
|
|
404 |
EXPORT_C TUint8 TUsbDeviceQualifierDescriptor::DeviceSubClass() const
|
|
|
405 |
{
|
|
|
406 |
return ParseTUint8(iBlob, EbDeviceSubClass);
|
|
|
407 |
}
|
|
|
408 |
|
|
|
409 |
EXPORT_C TUint8 TUsbDeviceQualifierDescriptor::DeviceProtocol() const
|
|
|
410 |
{
|
|
|
411 |
return ParseTUint8(iBlob, EbDeviceProtocol);
|
|
|
412 |
}
|
|
|
413 |
|
|
|
414 |
EXPORT_C TUint8 TUsbDeviceQualifierDescriptor::MaxPacketSize0() const
|
|
|
415 |
{
|
|
|
416 |
return ParseTUint8(iBlob, EbMaxPacketSize0);
|
|
|
417 |
}
|
|
|
418 |
|
|
|
419 |
EXPORT_C TUint8 TUsbDeviceQualifierDescriptor::NumConfigurations() const
|
|
|
420 |
{
|
|
|
421 |
return ParseTUint8(iBlob, EbNumConfigurations);
|
|
|
422 |
}
|
|
|
423 |
|
|
|
424 |
EXPORT_C TUint8 TUsbDeviceQualifierDescriptor::Reserved() const
|
|
|
425 |
{
|
|
|
426 |
return ParseTUint8(iBlob, EbReserved);
|
|
|
427 |
}
|
|
|
428 |
|
|
|
429 |
/**
|
|
|
430 |
The parsing routine for device qualifier descriptors.
|
|
|
431 |
|
|
|
432 |
@internalComponent
|
|
|
433 |
*/
|
|
|
434 |
/*static*/ TUsbDeviceQualifierDescriptor* TUsbDeviceQualifierDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* /*aPreviousDesc*/)
|
|
|
435 |
{
|
|
|
436 |
TUsbDeviceQualifierDescriptor* devQualDes = NULL;
|
|
|
437 |
|
|
|
438 |
const TInt KMinDevQualDesDecisionLength = 2;
|
|
|
439 |
if( aUsbDes.Length() >= KMinDevQualDesDecisionLength &&
|
|
|
440 |
aUsbDes[KbDescriptorTypeOffset] == EDeviceQualifier &&
|
|
|
441 |
aUsbDes[KbLengthOffset] == TUsbDeviceQualifierDescriptor::KSizeInOctets)
|
|
|
442 |
{
|
|
|
443 |
// Robustness check - check the length field is valid, and that we have enough data.
|
|
|
444 |
if(aUsbDes.Length() < TUsbDeviceQualifierDescriptor::KSizeInOctets)
|
|
|
445 |
{
|
|
|
446 |
User::Leave(KErrCorrupt);
|
|
|
447 |
}
|
|
|
448 |
|
|
|
449 |
// Looks ok to be a device quialifier descriptor.
|
|
|
450 |
devQualDes = new(ELeave) TUsbDeviceQualifierDescriptor;
|
|
|
451 |
// Set the standard fields
|
|
|
452 |
devQualDes->ibLength = TUsbDeviceQualifierDescriptor::KSizeInOctets;
|
|
|
453 |
devQualDes->ibDescriptorType = EDeviceQualifier;
|
|
|
454 |
// Set the blob appropriately
|
|
|
455 |
devQualDes->iBlob.Set(aUsbDes.Left(TUsbDeviceQualifierDescriptor::KSizeInOctets));
|
|
|
456 |
|
|
|
457 |
devQualDes->iRecognisedAndParsed = ERecognised;
|
|
|
458 |
|
|
|
459 |
// Update the data-left-to-parse Symbian descriptor
|
|
|
460 |
aUsbDes.Set(aUsbDes.Mid(TUsbDeviceQualifierDescriptor::KSizeInOctets));
|
|
|
461 |
}
|
|
|
462 |
|
|
|
463 |
return devQualDes;
|
|
|
464 |
}
|
|
|
465 |
|
|
|
466 |
/**
|
|
|
467 |
@internalComponent
|
|
|
468 |
*/
|
|
|
469 |
/*virtual*/ TBool TUsbDeviceQualifierDescriptor::IsParent(TUsbGenericDescriptor& /*aPotentialParent*/)
|
|
|
470 |
{
|
|
|
471 |
// Like a device descriptor, they should be top-level.
|
|
|
472 |
return EFalse;
|
|
|
473 |
}
|
|
|
474 |
|
|
|
475 |
/**
|
|
|
476 |
@internalComponent
|
|
|
477 |
*/
|
|
|
478 |
/*virtual*/ TBool TUsbDeviceQualifierDescriptor::IsPeer(TUsbGenericDescriptor& /*aPotentialPeer*/)
|
|
|
479 |
{
|
|
|
480 |
// Like a device descriptor, they should come by themselves.
|
|
|
481 |
return EFalse;
|
|
|
482 |
}
|
|
|
483 |
|
|
|
484 |
|
|
|
485 |
// ----------------------------
|
|
|
486 |
// TUsbConfigurationDescriptor
|
|
|
487 |
// See section 9.6.3 of the USB 2.0 specification.
|
|
|
488 |
// ----------------------------
|
|
|
489 |
|
|
|
490 |
EXPORT_C TUsbConfigurationDescriptor::TUsbConfigurationDescriptor()
|
|
|
491 |
{
|
|
|
492 |
}
|
|
|
493 |
|
|
|
494 |
EXPORT_C /*static*/ TUsbConfigurationDescriptor* TUsbConfigurationDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
|
|
|
495 |
{
|
|
|
496 |
TUsbConfigurationDescriptor* ret = NULL;
|
|
|
497 |
// Only cast if correctly indentified as configuration descriptor
|
|
|
498 |
if( aOriginal &&
|
|
|
499 |
aOriginal->ibDescriptorType == EConfiguration &&
|
|
|
500 |
aOriginal->ibLength == TUsbConfigurationDescriptor::KSizeInOctets &&
|
|
|
501 |
aOriginal->iRecognisedAndParsed == ERecognised)
|
|
|
502 |
{
|
|
|
503 |
ret = static_cast<TUsbConfigurationDescriptor*>(aOriginal);
|
|
|
504 |
}
|
|
|
505 |
return ret;
|
|
|
506 |
}
|
|
|
507 |
|
|
|
508 |
EXPORT_C TUint16 TUsbConfigurationDescriptor::TotalLength() const
|
|
|
509 |
{
|
|
|
510 |
return ParseTUint16(iBlob, EwTotalLength);
|
|
|
511 |
}
|
|
|
512 |
|
|
|
513 |
EXPORT_C TUint8 TUsbConfigurationDescriptor::NumInterfaces() const
|
|
|
514 |
{
|
|
|
515 |
return ParseTUint8(iBlob, EbNumInterfaces);
|
|
|
516 |
}
|
|
|
517 |
|
|
|
518 |
EXPORT_C TUint8 TUsbConfigurationDescriptor::ConfigurationValue() const
|
|
|
519 |
{
|
|
|
520 |
return ParseTUint8(iBlob, EbConfigurationValue);
|
|
|
521 |
}
|
|
|
522 |
|
|
|
523 |
EXPORT_C TUint8 TUsbConfigurationDescriptor::ConfigurationIndex() const
|
|
|
524 |
{
|
|
|
525 |
return ParseTUint8(iBlob, EiConfiguration);
|
|
|
526 |
}
|
|
|
527 |
|
|
|
528 |
EXPORT_C TUint8 TUsbConfigurationDescriptor::Attributes() const
|
|
|
529 |
{
|
|
|
530 |
return ParseTUint8(iBlob, EbmAttributes);
|
|
|
531 |
}
|
|
|
532 |
|
|
|
533 |
EXPORT_C TUint8 TUsbConfigurationDescriptor::MaxPower() const
|
|
|
534 |
{
|
|
|
535 |
return ParseTUint8(iBlob, EbMaxPower);
|
|
|
536 |
}
|
|
|
537 |
|
|
|
538 |
/**
|
|
|
539 |
The parsing routine for configuration descriptors.
|
|
|
540 |
|
|
|
541 |
@internalComponent
|
|
|
542 |
*/
|
|
|
543 |
/*static*/ TUsbConfigurationDescriptor* TUsbConfigurationDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* /*aPreviousDesc*/)
|
|
|
544 |
{
|
|
|
545 |
TUsbConfigurationDescriptor* configDes = NULL;
|
|
|
546 |
|
|
|
547 |
const TInt KMinConfigDesDecisionLength = 2;
|
|
|
548 |
if( aUsbDes.Length() >= KMinConfigDesDecisionLength &&
|
|
|
549 |
aUsbDes[KbDescriptorTypeOffset] == EConfiguration &&
|
|
|
550 |
aUsbDes[KbLengthOffset] == TUsbConfigurationDescriptor::KSizeInOctets)
|
|
|
551 |
{
|
|
|
552 |
// Robustness check - check the length field is valid, and that we have enough data.
|
|
|
553 |
if(aUsbDes.Length() < TUsbConfigurationDescriptor::KSizeInOctets)
|
|
|
554 |
{
|
|
|
555 |
User::Leave(KErrCorrupt);
|
|
|
556 |
}
|
|
|
557 |
|
|
|
558 |
// Robustness check - check that there is sufficient data for whole bundle (wTotalLength)
|
|
|
559 |
const TInt KwTotalLengthOffset = 2;
|
|
|
560 |
if(aUsbDes.Length() < ParseTUint16(aUsbDes, KwTotalLengthOffset))
|
|
|
561 |
{
|
|
|
562 |
User::Leave(KErrCorrupt);
|
|
|
563 |
}
|
|
|
564 |
|
|
|
565 |
// Looks ok to be a configuration descriptor.
|
|
|
566 |
configDes = new(ELeave) TUsbConfigurationDescriptor;
|
|
|
567 |
// Set the standard fields
|
|
|
568 |
configDes->ibLength = TUsbConfigurationDescriptor::KSizeInOctets;
|
|
|
569 |
configDes->ibDescriptorType = EConfiguration;
|
|
|
570 |
// Set the blob appropriately
|
|
|
571 |
configDes->iBlob.Set(aUsbDes.Left(TUsbConfigurationDescriptor::KSizeInOctets));
|
|
|
572 |
|
|
|
573 |
configDes->iRecognisedAndParsed = ERecognised;
|
|
|
574 |
|
|
|
575 |
// Update the data-left-to-parse Symbian descriptor
|
|
|
576 |
aUsbDes.Set(aUsbDes.Mid(TUsbConfigurationDescriptor::KSizeInOctets));
|
|
|
577 |
}
|
|
|
578 |
|
|
|
579 |
return configDes;
|
|
|
580 |
}
|
|
|
581 |
|
|
|
582 |
/**
|
|
|
583 |
@internalComponent
|
|
|
584 |
*/
|
|
|
585 |
/*virtual*/ TBool TUsbConfigurationDescriptor::IsParent(TUsbGenericDescriptor& /*aPotentialParent*/)
|
|
|
586 |
{
|
|
|
587 |
// A configuration descriptor should always be the top-level descriptor in a configuration
|
|
|
588 |
// bundle.
|
|
|
589 |
return EFalse;
|
|
|
590 |
}
|
|
|
591 |
|
|
|
592 |
/**
|
|
|
593 |
@internalComponent
|
|
|
594 |
*/
|
|
|
595 |
/*virtual*/ TBool TUsbConfigurationDescriptor::IsPeer(TUsbGenericDescriptor& /*aPotentialPeer*/)
|
|
|
596 |
{
|
|
|
597 |
// There should only ever be one configuration descriptor in a bundle.
|
|
|
598 |
return EFalse;
|
|
|
599 |
}
|
|
|
600 |
|
|
|
601 |
|
|
|
602 |
// --------------------------
|
|
|
603 |
// TUsbOtherSpeedDescriptor
|
|
|
604 |
// See section 9.6.4 of the USB 2.0 specification.
|
|
|
605 |
// --------------------------
|
|
|
606 |
|
|
|
607 |
EXPORT_C TUsbOtherSpeedDescriptor::TUsbOtherSpeedDescriptor()
|
|
|
608 |
{
|
|
|
609 |
}
|
|
|
610 |
|
|
|
611 |
EXPORT_C /*static*/ TUsbOtherSpeedDescriptor* TUsbOtherSpeedDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
|
|
|
612 |
{
|
|
|
613 |
TUsbOtherSpeedDescriptor* ret = NULL;
|
|
|
614 |
// Only cast if correctly indentified as other speed descriptor
|
|
|
615 |
if( aOriginal &&
|
|
|
616 |
aOriginal->ibDescriptorType == EOtherSpeedConfiguration &&
|
|
|
617 |
aOriginal->ibLength == TUsbOtherSpeedDescriptor::KSizeInOctets &&
|
|
|
618 |
aOriginal->iRecognisedAndParsed == ERecognised)
|
|
|
619 |
{
|
|
|
620 |
ret = static_cast<TUsbOtherSpeedDescriptor*>(aOriginal);
|
|
|
621 |
}
|
|
|
622 |
return ret;
|
|
|
623 |
}
|
|
|
624 |
|
|
|
625 |
EXPORT_C TUint16 TUsbOtherSpeedDescriptor::TotalLength() const
|
|
|
626 |
{
|
|
|
627 |
return ParseTUint16(iBlob, EwTotalLength);
|
|
|
628 |
}
|
|
|
629 |
|
|
|
630 |
EXPORT_C TUint8 TUsbOtherSpeedDescriptor::NumInterfaces() const
|
|
|
631 |
{
|
|
|
632 |
return ParseTUint8(iBlob, EbNumInterfaces);
|
|
|
633 |
}
|
|
|
634 |
|
|
|
635 |
EXPORT_C TUint8 TUsbOtherSpeedDescriptor::ConfigurationValue() const
|
|
|
636 |
{
|
|
|
637 |
return ParseTUint8(iBlob, EbConfigurationValue);
|
|
|
638 |
}
|
|
|
639 |
|
|
|
640 |
EXPORT_C TUint8 TUsbOtherSpeedDescriptor::ConfigurationIndex() const
|
|
|
641 |
{
|
|
|
642 |
return ParseTUint8(iBlob, EiConfiguration);
|
|
|
643 |
}
|
|
|
644 |
|
|
|
645 |
EXPORT_C TUint8 TUsbOtherSpeedDescriptor::Attributes() const
|
|
|
646 |
{
|
|
|
647 |
return ParseTUint8(iBlob, EbmAttributes);
|
|
|
648 |
}
|
|
|
649 |
|
|
|
650 |
EXPORT_C TUint8 TUsbOtherSpeedDescriptor::MaxPower() const
|
|
|
651 |
{
|
|
|
652 |
return ParseTUint8(iBlob, EbMaxPower);
|
|
|
653 |
}
|
|
|
654 |
|
|
|
655 |
/**
|
|
|
656 |
The parsing routine for other speed descriptors.
|
|
|
657 |
|
|
|
658 |
@internalComponent
|
|
|
659 |
*/
|
|
|
660 |
/*static*/ TUsbOtherSpeedDescriptor* TUsbOtherSpeedDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* /*aPreviousDesc*/)
|
|
|
661 |
{
|
|
|
662 |
TUsbOtherSpeedDescriptor* oSpeedDes = NULL;
|
|
|
663 |
|
|
|
664 |
const TInt KMinOtherSpeedDesDecisionLength = 2;
|
|
|
665 |
if( aUsbDes.Length() >= KMinOtherSpeedDesDecisionLength &&
|
|
|
666 |
aUsbDes[KbDescriptorTypeOffset] == EOtherSpeedConfiguration &&
|
|
|
667 |
aUsbDes[KbLengthOffset] == TUsbOtherSpeedDescriptor::KSizeInOctets)
|
|
|
668 |
{
|
|
|
669 |
// Robustness check - check the length field is valid, and that we have enough data.
|
|
|
670 |
if(aUsbDes.Length() < TUsbOtherSpeedDescriptor::KSizeInOctets)
|
|
|
671 |
{
|
|
|
672 |
User::Leave(KErrCorrupt);
|
|
|
673 |
}
|
|
|
674 |
|
|
|
675 |
// Robustness check - check that there is sufficient data for whole bundle (wTotalLength)
|
|
|
676 |
const TInt KwTotalLengthOffset = 2;
|
|
|
677 |
if(aUsbDes.Length() < ParseTUint16(aUsbDes, KwTotalLengthOffset))
|
|
|
678 |
{
|
|
|
679 |
User::Leave(KErrCorrupt);
|
|
|
680 |
}
|
|
|
681 |
|
|
|
682 |
// Looks ok to be an other speed descriptor.
|
|
|
683 |
oSpeedDes = new(ELeave) TUsbOtherSpeedDescriptor;
|
|
|
684 |
// Set the standard fields
|
|
|
685 |
oSpeedDes->ibLength = TUsbOtherSpeedDescriptor::KSizeInOctets;
|
|
|
686 |
oSpeedDes->ibDescriptorType = EOtherSpeedConfiguration;
|
|
|
687 |
// Set the blob appropriately
|
|
|
688 |
oSpeedDes->iBlob.Set(aUsbDes.Left(TUsbOtherSpeedDescriptor::KSizeInOctets));
|
|
|
689 |
|
|
|
690 |
oSpeedDes->iRecognisedAndParsed = ERecognised;
|
|
|
691 |
|
|
|
692 |
// Update the data-left-to-parse Symbian descriptor
|
|
|
693 |
aUsbDes.Set(aUsbDes.Mid(TUsbOtherSpeedDescriptor::KSizeInOctets));
|
|
|
694 |
}
|
|
|
695 |
|
|
|
696 |
return oSpeedDes;
|
|
|
697 |
}
|
|
|
698 |
|
|
|
699 |
/**
|
|
|
700 |
@internalComponent
|
|
|
701 |
*/
|
|
|
702 |
/*virtual*/ TBool TUsbOtherSpeedDescriptor::IsParent(TUsbGenericDescriptor& /*aPotentialParent*/)
|
|
|
703 |
{
|
|
|
704 |
// Other speed descriptor is like a configuration descriptor, in that it should
|
|
|
705 |
// not have any parents in a bundle.
|
|
|
706 |
return EFalse;
|
|
|
707 |
}
|
|
|
708 |
|
|
|
709 |
/**
|
|
|
710 |
@internalComponent
|
|
|
711 |
*/
|
|
|
712 |
/*virtual*/ TBool TUsbOtherSpeedDescriptor::IsPeer(TUsbGenericDescriptor& /*aPotentialPeer*/)
|
|
|
713 |
{
|
|
|
714 |
// There should only ever be one other speed descriptor in a bundle.
|
|
|
715 |
return EFalse;
|
|
|
716 |
}
|
|
|
717 |
|
|
|
718 |
|
|
|
719 |
// ------------------------------------
|
|
|
720 |
// TUsbInterfaceAssociationDescriptor
|
|
|
721 |
// See the USB IAD ECN.
|
|
|
722 |
// ------------------------------------
|
|
|
723 |
|
|
|
724 |
EXPORT_C TUsbInterfaceAssociationDescriptor::TUsbInterfaceAssociationDescriptor()
|
|
|
725 |
{
|
|
|
726 |
}
|
|
|
727 |
|
|
|
728 |
EXPORT_C /*static*/ TUsbInterfaceAssociationDescriptor* TUsbInterfaceAssociationDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
|
|
|
729 |
{
|
|
|
730 |
TUsbInterfaceAssociationDescriptor* ret = NULL;
|
|
|
731 |
// Only cast if correctly indentified as interface association descriptor
|
|
|
732 |
if( aOriginal &&
|
|
|
733 |
aOriginal->ibDescriptorType == EInterfaceAssociation &&
|
|
|
734 |
aOriginal->ibLength == TUsbInterfaceAssociationDescriptor::KSizeInOctets &&
|
|
|
735 |
aOriginal->iRecognisedAndParsed == ERecognised)
|
|
|
736 |
{
|
|
|
737 |
ret = static_cast<TUsbInterfaceAssociationDescriptor*>(aOriginal);
|
|
|
738 |
}
|
|
|
739 |
return ret;
|
|
|
740 |
}
|
|
|
741 |
|
|
|
742 |
EXPORT_C TUint8 TUsbInterfaceAssociationDescriptor::FirstInterface() const
|
|
|
743 |
{
|
|
|
744 |
return ParseTUint8(iBlob, EbFirstInterface);
|
|
|
745 |
}
|
|
|
746 |
|
|
|
747 |
EXPORT_C TUint8 TUsbInterfaceAssociationDescriptor::InterfaceCount() const
|
|
|
748 |
{
|
|
|
749 |
return ParseTUint8(iBlob, EbInterfaceCount);
|
|
|
750 |
}
|
|
|
751 |
|
|
|
752 |
EXPORT_C TUint8 TUsbInterfaceAssociationDescriptor::FunctionClass() const
|
|
|
753 |
{
|
|
|
754 |
return ParseTUint8(iBlob, EbFunctionClass);
|
|
|
755 |
}
|
|
|
756 |
|
|
|
757 |
EXPORT_C TUint8 TUsbInterfaceAssociationDescriptor::FunctionSubClass() const
|
|
|
758 |
{
|
|
|
759 |
return ParseTUint8(iBlob, EbFunctionSubClass);
|
|
|
760 |
}
|
|
|
761 |
|
|
|
762 |
EXPORT_C TUint8 TUsbInterfaceAssociationDescriptor::FunctionProtocol() const
|
|
|
763 |
{
|
|
|
764 |
return ParseTUint8(iBlob, EbFunctionProtocol);
|
|
|
765 |
}
|
|
|
766 |
|
|
|
767 |
EXPORT_C TUint8 TUsbInterfaceAssociationDescriptor::FunctionIndex() const
|
|
|
768 |
{
|
|
|
769 |
return ParseTUint8(iBlob, EiFunction);
|
|
|
770 |
}
|
|
|
771 |
|
|
|
772 |
/*static*/ TUsbInterfaceAssociationDescriptor* TUsbInterfaceAssociationDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* /*aPreviousDesc*/)
|
|
|
773 |
{
|
|
|
774 |
TUsbInterfaceAssociationDescriptor* intAssocDes = NULL;
|
|
|
775 |
|
|
|
776 |
const TInt KMinIntAssocDesDecisionLength = 2;
|
|
|
777 |
if( aUsbDes.Length() >= KMinIntAssocDesDecisionLength &&
|
|
|
778 |
aUsbDes[KbDescriptorTypeOffset] == EInterfaceAssociation &&
|
|
|
779 |
aUsbDes[KbLengthOffset] == TUsbInterfaceAssociationDescriptor::KSizeInOctets)
|
|
|
780 |
{
|
|
|
781 |
// Robustness check - check the length field is valid, and that we have enough data.
|
|
|
782 |
if(aUsbDes.Length() < TUsbInterfaceAssociationDescriptor::KSizeInOctets)
|
|
|
783 |
{
|
|
|
784 |
User::Leave(KErrCorrupt);
|
|
|
785 |
}
|
|
|
786 |
|
|
|
787 |
// Looks ok to be a interface association descriptor.
|
|
|
788 |
intAssocDes = new(ELeave) TUsbInterfaceAssociationDescriptor;
|
|
|
789 |
// Set the standard fields
|
|
|
790 |
intAssocDes->ibLength = TUsbInterfaceAssociationDescriptor::KSizeInOctets;
|
|
|
791 |
intAssocDes->ibDescriptorType = EInterfaceAssociation;
|
|
|
792 |
// Set the blob appropriately
|
|
|
793 |
intAssocDes->iBlob.Set(aUsbDes.Left(TUsbInterfaceAssociationDescriptor::KSizeInOctets));
|
|
|
794 |
|
|
|
795 |
intAssocDes->iRecognisedAndParsed = ERecognised;
|
|
|
796 |
|
|
|
797 |
// Update the data-left-to-parse Symbian descriptor
|
|
|
798 |
aUsbDes.Set(aUsbDes.Mid(TUsbInterfaceAssociationDescriptor::KSizeInOctets));
|
|
|
799 |
}
|
|
|
800 |
|
|
|
801 |
return intAssocDes;
|
|
|
802 |
}
|
|
|
803 |
|
|
|
804 |
/**
|
|
|
805 |
@internalComponent
|
|
|
806 |
*/
|
|
|
807 |
/*virtual*/ TBool TUsbInterfaceAssociationDescriptor::IsParent(TUsbGenericDescriptor& aPotentialParent)
|
|
|
808 |
{
|
|
|
809 |
switch(aPotentialParent.ibDescriptorType)
|
|
|
810 |
{
|
|
|
811 |
case EConfiguration:
|
|
|
812 |
return ETrue;
|
|
|
813 |
case EOtherSpeedConfiguration:
|
|
|
814 |
return ETrue; // I think this should be EFalse by my reading of the USB spec - however
|
|
|
815 |
// it is not explicitly clear, so play it safe.
|
|
|
816 |
default:
|
|
|
817 |
return EFalse;
|
|
|
818 |
}
|
|
|
819 |
}
|
|
|
820 |
|
|
|
821 |
/**
|
|
|
822 |
@internalComponent
|
|
|
823 |
*/
|
|
|
824 |
/*virtual*/ TBool TUsbInterfaceAssociationDescriptor::IsPeer(TUsbGenericDescriptor& aPotentialPeer)
|
|
|
825 |
{
|
|
|
826 |
switch(aPotentialPeer.ibDescriptorType)
|
|
|
827 |
{
|
|
|
828 |
case EInterfaceAssociation:
|
|
|
829 |
return ETrue;
|
|
|
830 |
case EInterface:
|
|
|
831 |
// Only interfaces are peers of IADs.
|
|
|
832 |
{
|
|
|
833 |
TUsbInterfaceDescriptor* intDesc = TUsbInterfaceDescriptor::Cast(&aPotentialPeer);
|
|
|
834 |
if(intDesc)
|
|
|
835 |
{
|
|
|
836 |
TInt intNum = intDesc->InterfaceNumber();
|
|
|
837 |
intNum -= FirstInterface();
|
|
|
838 |
if(intNum < 0 || intNum >= InterfaceCount())
|
|
|
839 |
{
|
|
|
840 |
// The interface number is outside the IAD region.
|
|
|
841 |
return ETrue;
|
|
|
842 |
}
|
|
|
843 |
}
|
|
|
844 |
return EFalse;
|
|
|
845 |
}
|
|
|
846 |
default:
|
|
|
847 |
return EFalse;
|
|
|
848 |
}
|
|
|
849 |
}
|
|
|
850 |
|
|
|
851 |
/*virtual*/ TBool TUsbInterfaceAssociationDescriptor::IsChild(TUsbGenericDescriptor& aPotentialChild)
|
|
|
852 |
{
|
|
|
853 |
switch(aPotentialChild.ibDescriptorType)
|
|
|
854 |
{
|
|
|
855 |
case EInterface:
|
|
|
856 |
// Only interfaces are children of IADs. And only if they are special.
|
|
|
857 |
{
|
|
|
858 |
TUsbInterfaceDescriptor* intDesc = TUsbInterfaceDescriptor::Cast(&aPotentialChild);
|
|
|
859 |
if(intDesc)
|
|
|
860 |
{
|
|
|
861 |
TInt intNum = intDesc->InterfaceNumber();
|
|
|
862 |
intNum -= FirstInterface();
|
|
|
863 |
if(intNum >= 0 && intNum < InterfaceCount())
|
|
|
864 |
{
|
|
|
865 |
// The interface number is within the IAD region required.
|
|
|
866 |
return ETrue;
|
|
|
867 |
}
|
|
|
868 |
}
|
|
|
869 |
return EFalse;
|
|
|
870 |
}
|
|
|
871 |
default:
|
|
|
872 |
return EFalse;
|
|
|
873 |
}
|
|
|
874 |
}
|
|
|
875 |
|
|
|
876 |
|
|
|
877 |
// -------------------------
|
|
|
878 |
// TUsbInterfaceDescriptor
|
|
|
879 |
// See section 9.6.5 of the USB 2.0 specification.
|
|
|
880 |
// -------------------------
|
|
|
881 |
|
|
|
882 |
EXPORT_C TUsbInterfaceDescriptor::TUsbInterfaceDescriptor()
|
|
|
883 |
{
|
|
|
884 |
}
|
|
|
885 |
|
|
|
886 |
EXPORT_C /*static*/ TUsbInterfaceDescriptor* TUsbInterfaceDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
|
|
|
887 |
{
|
|
|
888 |
TUsbInterfaceDescriptor* ret = NULL;
|
|
|
889 |
// Only cast if correctly indentified as interface descriptor
|
|
|
890 |
if( aOriginal &&
|
|
|
891 |
aOriginal->ibDescriptorType == EInterface &&
|
|
|
892 |
aOriginal->ibLength == TUsbInterfaceDescriptor::KSizeInOctets &&
|
|
|
893 |
aOriginal->iRecognisedAndParsed == ERecognised)
|
|
|
894 |
{
|
|
|
895 |
ret = static_cast<TUsbInterfaceDescriptor*>(aOriginal);
|
|
|
896 |
}
|
|
|
897 |
return ret;
|
|
|
898 |
}
|
|
|
899 |
|
|
|
900 |
EXPORT_C TUint8 TUsbInterfaceDescriptor::InterfaceNumber() const
|
|
|
901 |
{
|
|
|
902 |
return ParseTUint8(iBlob, EbInterfaceNumber);
|
|
|
903 |
}
|
|
|
904 |
|
|
|
905 |
EXPORT_C TUint8 TUsbInterfaceDescriptor::AlternateSetting() const
|
|
|
906 |
{
|
|
|
907 |
return ParseTUint8(iBlob, EbAlternateSetting);
|
|
|
908 |
}
|
|
|
909 |
|
|
|
910 |
EXPORT_C TUint8 TUsbInterfaceDescriptor::NumEndpoints() const
|
|
|
911 |
{
|
|
|
912 |
return ParseTUint8(iBlob, EbNumEndpoints);
|
|
|
913 |
}
|
|
|
914 |
|
|
|
915 |
EXPORT_C TUint8 TUsbInterfaceDescriptor::InterfaceClass() const
|
|
|
916 |
{
|
|
|
917 |
return ParseTUint8(iBlob, EbInterfaceClass);
|
|
|
918 |
}
|
|
|
919 |
|
|
|
920 |
EXPORT_C TUint8 TUsbInterfaceDescriptor::InterfaceSubClass() const
|
|
|
921 |
{
|
|
|
922 |
return ParseTUint8(iBlob, EbInterfaceSubClass);
|
|
|
923 |
}
|
|
|
924 |
|
|
|
925 |
EXPORT_C TUint8 TUsbInterfaceDescriptor::InterfaceProtocol() const
|
|
|
926 |
{
|
|
|
927 |
return ParseTUint8(iBlob, EbInterfaceProtocol);
|
|
|
928 |
}
|
|
|
929 |
|
|
|
930 |
EXPORT_C TUint8 TUsbInterfaceDescriptor::Interface() const
|
|
|
931 |
{
|
|
|
932 |
return ParseTUint8(iBlob, EiInterface);
|
|
|
933 |
}
|
|
|
934 |
|
|
|
935 |
/**
|
|
|
936 |
The parsing routine for interface descriptors.
|
|
|
937 |
|
|
|
938 |
@internalComponent
|
|
|
939 |
*/
|
|
|
940 |
/*static*/ TUsbInterfaceDescriptor* TUsbInterfaceDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* /*aPreviousDesc*/)
|
|
|
941 |
{
|
|
|
942 |
TUsbInterfaceDescriptor* intDes = NULL;
|
|
|
943 |
|
|
|
944 |
const TInt KMinInterfaceDesDecisionLength = 2;
|
|
|
945 |
if( aUsbDes.Length() >= KMinInterfaceDesDecisionLength &&
|
|
|
946 |
aUsbDes[KbDescriptorTypeOffset] == EInterface &&
|
|
|
947 |
aUsbDes[KbLengthOffset] == TUsbInterfaceDescriptor::KSizeInOctets)
|
|
|
948 |
{
|
|
|
949 |
// Robustness check - check the length field is valid, and that we have enough data.
|
|
|
950 |
if(aUsbDes.Length() < TUsbInterfaceDescriptor::KSizeInOctets)
|
|
|
951 |
{
|
|
|
952 |
User::Leave(KErrCorrupt);
|
|
|
953 |
}
|
|
|
954 |
|
|
|
955 |
// Looks ok to be an interface descriptor.
|
|
|
956 |
intDes = new(ELeave) TUsbInterfaceDescriptor;
|
|
|
957 |
// Set the standard fields
|
|
|
958 |
intDes->ibLength = TUsbInterfaceDescriptor::KSizeInOctets;
|
|
|
959 |
intDes->ibDescriptorType = EInterface;
|
|
|
960 |
// Set the blob appropriately
|
|
|
961 |
intDes->iBlob.Set(aUsbDes.Left(TUsbInterfaceDescriptor::KSizeInOctets));
|
|
|
962 |
|
|
|
963 |
intDes->iRecognisedAndParsed = ERecognised;
|
|
|
964 |
|
|
|
965 |
// Update the data-left-to-parse Symbian descriptor
|
|
|
966 |
aUsbDes.Set(aUsbDes.Mid(TUsbInterfaceDescriptor::KSizeInOctets));
|
|
|
967 |
}
|
|
|
968 |
|
|
|
969 |
return intDes;
|
|
|
970 |
}
|
|
|
971 |
|
|
|
972 |
/**
|
|
|
973 |
@internalComponent
|
|
|
974 |
*/
|
|
|
975 |
/*virtual*/ TBool TUsbInterfaceDescriptor::IsParent(TUsbGenericDescriptor& aPotentialParent)
|
|
|
976 |
{
|
|
|
977 |
switch(aPotentialParent.ibDescriptorType)
|
|
|
978 |
{
|
|
|
979 |
case EConfiguration:
|
|
|
980 |
return ETrue;
|
|
|
981 |
case EOtherSpeedConfiguration:
|
|
|
982 |
return ETrue; // I think this should be EFalse by my reading of the USB spec - however
|
|
|
983 |
// it is not explicitly clear, so play it safe.
|
|
|
984 |
// case EInterfaceAssociation:
|
|
|
985 |
// We let the IAD descriptor handle the logic of how we bind to it.
|
|
|
986 |
default:
|
|
|
987 |
return EFalse;
|
|
|
988 |
}
|
|
|
989 |
}
|
|
|
990 |
|
|
|
991 |
/**
|
|
|
992 |
@internalComponent
|
|
|
993 |
*/
|
|
|
994 |
/*virtual*/ TBool TUsbInterfaceDescriptor::IsPeer(TUsbGenericDescriptor& aPotentialPeer)
|
|
|
995 |
{
|
|
|
996 |
switch(aPotentialPeer.ibDescriptorType)
|
|
|
997 |
{
|
|
|
998 |
//case EInterfaceAssociation:
|
|
|
999 |
// We let the IAD descriptor handle the logic of how we bind to it.
|
|
|
1000 |
case EInterface:
|
|
|
1001 |
// If another interface descriptor then it is a peer not child.
|
|
|
1002 |
return ETrue;
|
|
|
1003 |
default:
|
|
|
1004 |
// Any other descriptors are ignored.
|
|
|
1005 |
return EFalse;
|
|
|
1006 |
}
|
|
|
1007 |
}
|
|
|
1008 |
|
|
|
1009 |
|
|
|
1010 |
// ------------------------
|
|
|
1011 |
// TUsbEndpointDescriptor
|
|
|
1012 |
// See section 9.6.6 of the USB 2.0 specification.
|
|
|
1013 |
// ------------------------
|
|
|
1014 |
|
|
|
1015 |
EXPORT_C TUsbEndpointDescriptor::TUsbEndpointDescriptor()
|
|
|
1016 |
{
|
|
|
1017 |
}
|
|
|
1018 |
|
|
|
1019 |
EXPORT_C /*static*/ TUsbEndpointDescriptor* TUsbEndpointDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
|
|
|
1020 |
{
|
|
|
1021 |
TUsbEndpointDescriptor* ret = NULL;
|
|
|
1022 |
// Only cast if correctly indentified as endpoint descriptor
|
|
|
1023 |
if( aOriginal &&
|
|
|
1024 |
aOriginal->ibDescriptorType == EEndpoint &&
|
|
|
1025 |
aOriginal->ibLength == TUsbEndpointDescriptor::KSizeInOctets &&
|
|
|
1026 |
aOriginal->iRecognisedAndParsed == ERecognised)
|
|
|
1027 |
{
|
|
|
1028 |
ret = static_cast<TUsbEndpointDescriptor*>(aOriginal);
|
|
|
1029 |
}
|
|
|
1030 |
return ret;
|
|
|
1031 |
}
|
|
|
1032 |
|
|
|
1033 |
EXPORT_C TUint8 TUsbEndpointDescriptor::EndpointAddress() const
|
|
|
1034 |
{
|
|
|
1035 |
return ParseTUint8(iBlob, EbEndpointAddress);
|
|
|
1036 |
}
|
|
|
1037 |
|
|
|
1038 |
EXPORT_C TUint8 TUsbEndpointDescriptor::Attributes() const
|
|
|
1039 |
{
|
|
|
1040 |
return ParseTUint8(iBlob, EbmAttributes);
|
|
|
1041 |
}
|
|
|
1042 |
|
|
|
1043 |
EXPORT_C TUint16 TUsbEndpointDescriptor::MaxPacketSize() const
|
|
|
1044 |
{
|
|
|
1045 |
return ParseTUint16(iBlob, EwMaxPacketSize);
|
|
|
1046 |
}
|
|
|
1047 |
|
|
|
1048 |
EXPORT_C TUint8 TUsbEndpointDescriptor::Interval() const
|
|
|
1049 |
{
|
|
|
1050 |
return ParseTUint8(iBlob, EbInterval);
|
|
|
1051 |
}
|
|
|
1052 |
|
|
|
1053 |
/**
|
|
|
1054 |
The parsing routine for endpoint descriptors.
|
|
|
1055 |
|
|
|
1056 |
@internalComponent
|
|
|
1057 |
*/
|
|
|
1058 |
/*static*/ TUsbEndpointDescriptor* TUsbEndpointDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* /*aPreviousDesc*/)
|
|
|
1059 |
{
|
|
|
1060 |
TUsbEndpointDescriptor* endDes = NULL;
|
|
|
1061 |
|
|
|
1062 |
const TInt KMinEndpointDesDecisionLength = 2;
|
|
|
1063 |
if( aUsbDes.Length() >= KMinEndpointDesDecisionLength &&
|
|
|
1064 |
aUsbDes[KbDescriptorTypeOffset] == EEndpoint &&
|
|
|
1065 |
aUsbDes[KbLengthOffset] == TUsbEndpointDescriptor::KSizeInOctets)
|
|
|
1066 |
{
|
|
|
1067 |
// Robustness check - check the length field is valid, and that we have enough data.
|
|
|
1068 |
if(aUsbDes.Length() < TUsbEndpointDescriptor::KSizeInOctets)
|
|
|
1069 |
{
|
|
|
1070 |
User::Leave(KErrCorrupt);
|
|
|
1071 |
}
|
|
|
1072 |
|
|
|
1073 |
// Looks ok to be an endpoint descriptor.
|
|
|
1074 |
endDes = new(ELeave) TUsbEndpointDescriptor;
|
|
|
1075 |
// Set the standard fields
|
|
|
1076 |
endDes->ibLength = TUsbEndpointDescriptor::KSizeInOctets;
|
|
|
1077 |
endDes->ibDescriptorType = EEndpoint;
|
|
|
1078 |
// Set the blob appropriately
|
|
|
1079 |
endDes->iBlob.Set(aUsbDes.Left(TUsbEndpointDescriptor::KSizeInOctets));
|
|
|
1080 |
|
|
|
1081 |
endDes->iRecognisedAndParsed = ERecognised;
|
|
|
1082 |
|
|
|
1083 |
// Update the data-left-to-parse Symbian descriptor
|
|
|
1084 |
aUsbDes.Set(aUsbDes.Mid(TUsbEndpointDescriptor::KSizeInOctets));
|
|
|
1085 |
}
|
|
|
1086 |
|
|
|
1087 |
return endDes;
|
|
|
1088 |
}
|
|
|
1089 |
|
|
|
1090 |
/**
|
|
|
1091 |
@internalComponent
|
|
|
1092 |
*/
|
|
|
1093 |
/*virtual*/ TBool TUsbEndpointDescriptor::IsParent(TUsbGenericDescriptor& aPotentialParent)
|
|
|
1094 |
{
|
|
|
1095 |
switch(aPotentialParent.ibDescriptorType)
|
|
|
1096 |
{
|
|
|
1097 |
case EInterface:
|
|
|
1098 |
return ETrue;
|
|
|
1099 |
default:
|
|
|
1100 |
return EFalse;
|
|
|
1101 |
}
|
|
|
1102 |
}
|
|
|
1103 |
|
|
|
1104 |
/**
|
|
|
1105 |
@internalComponent
|
|
|
1106 |
*/
|
|
|
1107 |
/*virtual*/ TBool TUsbEndpointDescriptor::IsPeer(TUsbGenericDescriptor& aPotentialPeer)
|
|
|
1108 |
{
|
|
|
1109 |
switch(aPotentialPeer.ibDescriptorType)
|
|
|
1110 |
{
|
|
|
1111 |
case EEndpoint:
|
|
|
1112 |
return ETrue;
|
|
|
1113 |
default:
|
|
|
1114 |
return EFalse;
|
|
|
1115 |
}
|
|
|
1116 |
}
|
|
|
1117 |
|
|
|
1118 |
// ------------------------
|
|
|
1119 |
// TUsbOTGDescriptor
|
|
|
1120 |
// See section 6.4 of the USB 2.0 On-The-Go Supplement Revision 1.3
|
|
|
1121 |
// ------------------------
|
|
|
1122 |
|
|
|
1123 |
EXPORT_C TUsbOTGDescriptor::TUsbOTGDescriptor()
|
|
|
1124 |
{
|
|
|
1125 |
}
|
|
|
1126 |
|
|
|
1127 |
EXPORT_C /*static*/ TUsbOTGDescriptor* TUsbOTGDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
|
|
|
1128 |
{
|
|
|
1129 |
TUsbOTGDescriptor* ret = NULL;
|
|
|
1130 |
// Only cast if correctly indentified as otg descriptor
|
|
|
1131 |
if( aOriginal &&
|
|
|
1132 |
aOriginal->ibDescriptorType == EOTG &&
|
|
273
|
1133 |
TUsbOTGDescriptor::IsValidOTGDescriptorLength( aOriginal->ibLength ) &&
|
|
189
|
1134 |
aOriginal->iRecognisedAndParsed == ERecognised)
|
|
|
1135 |
{
|
|
|
1136 |
ret = static_cast<TUsbOTGDescriptor*>(aOriginal);
|
|
|
1137 |
}
|
|
|
1138 |
return ret;
|
|
|
1139 |
}
|
|
|
1140 |
|
|
|
1141 |
EXPORT_C TUint8 TUsbOTGDescriptor::Attributes() const
|
|
|
1142 |
{
|
|
|
1143 |
return ParseTUint8(iBlob, EbmAttributes);
|
|
|
1144 |
}
|
|
|
1145 |
|
|
|
1146 |
EXPORT_C TBool TUsbOTGDescriptor::HNPSupported() const
|
|
|
1147 |
{
|
|
|
1148 |
return (ParseTUint8(iBlob, EbmAttributes) & 0x02) == 0x02;
|
|
|
1149 |
}
|
|
|
1150 |
|
|
|
1151 |
EXPORT_C TBool TUsbOTGDescriptor::SRPSupported() const
|
|
|
1152 |
{
|
|
|
1153 |
// Note: an illegal device (see 6.4.2 of the OTG specification) could
|
|
|
1154 |
// incorrectly return False for SRP and True for HNP
|
|
|
1155 |
// However this function just extracts the bit rather than attempting to
|
|
|
1156 |
// fix up a broken device. Devices broken in this way wouldn't be expected on
|
|
|
1157 |
// the TPL.
|
|
|
1158 |
return (ParseTUint8(iBlob, EbmAttributes) & 0x01) == 0x01;
|
|
|
1159 |
}
|
|
273
|
1160 |
|
|
|
1161 |
EXPORT_C TUint16 TUsbOTGDescriptor::BcdOTG() const
|
|
|
1162 |
{
|
|
|
1163 |
TUint16 bcdOTG = 0x0000;
|
|
|
1164 |
if ( iBlob[EbmLength] > TUsbOTGDescriptor::KSizeInOctets )
|
|
|
1165 |
{
|
|
|
1166 |
bcdOTG = ( iBlob[EbcdOTG] ) | ( iBlob[EbcdOTG + 1] << 8 );
|
|
|
1167 |
}
|
|
|
1168 |
return bcdOTG;
|
|
|
1169 |
}
|
|
|
1170 |
|
|
189
|
1171 |
/**
|
|
|
1172 |
The parsing routine for OTG descriptors.
|
|
|
1173 |
|
|
|
1174 |
@internalComponent
|
|
|
1175 |
*/
|
|
|
1176 |
/*static*/ TUsbOTGDescriptor* TUsbOTGDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* /*aPreviousDesc*/)
|
|
|
1177 |
{
|
|
|
1178 |
TUsbOTGDescriptor* endDes = NULL;
|
|
|
1179 |
|
|
273
|
1180 |
TUint8 descriptorLength = aUsbDes[KbLengthOffset];
|
|
189
|
1181 |
const TInt KMinOTGDesDecisionLength = 2;
|
|
|
1182 |
if( aUsbDes.Length() >= KMinOTGDesDecisionLength &&
|
|
|
1183 |
aUsbDes[KbDescriptorTypeOffset] == EOTG &&
|
|
273
|
1184 |
TUsbOTGDescriptor::IsValidOTGDescriptorLength( descriptorLength ) )
|
|
189
|
1185 |
{
|
|
|
1186 |
// Robustness check - check the length field is valid, and that we have enough data.
|
|
273
|
1187 |
if(aUsbDes.Length() < descriptorLength)
|
|
189
|
1188 |
{
|
|
|
1189 |
User::Leave(KErrCorrupt);
|
|
|
1190 |
}
|
|
|
1191 |
|
|
|
1192 |
// Looks ok to be an OTG descriptor.
|
|
|
1193 |
endDes = new(ELeave) TUsbOTGDescriptor;
|
|
|
1194 |
// Set the standard fields
|
|
273
|
1195 |
endDes->ibLength = descriptorLength;
|
|
189
|
1196 |
endDes->ibDescriptorType = EOTG;
|
|
|
1197 |
// Set the blob appropriately
|
|
273
|
1198 |
endDes->iBlob.Set(aUsbDes.Left(descriptorLength));
|
|
189
|
1199 |
|
|
|
1200 |
// Null the pointers
|
|
|
1201 |
endDes->iFirstChild = NULL;
|
|
|
1202 |
endDes->iNextPeer = NULL;
|
|
|
1203 |
endDes->iParent = NULL;
|
|
|
1204 |
|
|
|
1205 |
endDes->iRecognisedAndParsed = ERecognised;
|
|
|
1206 |
|
|
|
1207 |
// Update the data-left-to-parse Symbian descriptor
|
|
273
|
1208 |
aUsbDes.Set(aUsbDes.Mid(descriptorLength));
|
|
189
|
1209 |
}
|
|
|
1210 |
|
|
|
1211 |
return endDes;
|
|
|
1212 |
}
|
|
|
1213 |
|
|
|
1214 |
/**
|
|
|
1215 |
@internalComponent
|
|
|
1216 |
*/
|
|
|
1217 |
/*virtual*/ TBool TUsbOTGDescriptor::IsParent(TUsbGenericDescriptor& aPotentialParent)
|
|
|
1218 |
{
|
|
|
1219 |
switch(aPotentialParent.ibDescriptorType)
|
|
|
1220 |
{
|
|
|
1221 |
case EConfiguration: // we are part of a configuration descriptor, or standalone
|
|
|
1222 |
return ETrue;
|
|
|
1223 |
default:
|
|
|
1224 |
return EFalse;
|
|
|
1225 |
}
|
|
|
1226 |
}
|
|
|
1227 |
|
|
|
1228 |
/**
|
|
|
1229 |
@internalComponent
|
|
|
1230 |
*/
|
|
|
1231 |
/*virtual*/ TBool TUsbOTGDescriptor::IsPeer(TUsbGenericDescriptor& aPotentialPeer)
|
|
|
1232 |
{
|
|
|
1233 |
switch(aPotentialPeer.ibDescriptorType)
|
|
|
1234 |
{
|
|
|
1235 |
//case EInterfaceAssociation:
|
|
|
1236 |
// We let the IAD descriptor handle the logic of how we bind to it.
|
|
|
1237 |
case EInterface:
|
|
|
1238 |
// If another interface descriptor then it is a peer not child.
|
|
|
1239 |
return ETrue;
|
|
|
1240 |
default:
|
|
|
1241 |
// Any other descriptors are ignored.
|
|
|
1242 |
return EFalse;
|
|
|
1243 |
}
|
|
|
1244 |
}
|
|
|
1245 |
|
|
273
|
1246 |
/**
|
|
|
1247 |
@internalComponent
|
|
|
1248 |
*/
|
|
|
1249 |
/*static*/ TBool TUsbOTGDescriptor::IsValidOTGDescriptorLength(TUint8 aLength)
|
|
|
1250 |
{
|
|
|
1251 |
TBool ret = EFalse;
|
|
|
1252 |
const TUint8 KOTG13DescriptorLength = 3; //OTG1.3
|
|
|
1253 |
const TUint8 KOTG20DescriptorLength = 5; //OTG2.0
|
|
|
1254 |
if ( ( aLength == KOTG13DescriptorLength ) || ( aLength == KOTG20DescriptorLength ) )
|
|
|
1255 |
{
|
|
|
1256 |
ret = ETrue;
|
|
|
1257 |
}
|
|
|
1258 |
return ret;
|
|
|
1259 |
}
|
|
189
|
1260 |
|
|
|
1261 |
// ----------------------
|
|
|
1262 |
// TUsbStringDescriptor
|
|
|
1263 |
// See section 9.6.7 of the USB 2.0 specification.
|
|
|
1264 |
// ----------------------
|
|
|
1265 |
|
|
|
1266 |
// The length of the header in a string descriptor (i.e. the same as every other standard USB descriptor).
|
|
|
1267 |
static const TInt KStringDescriptorHeaderFieldLength = 2;
|
|
|
1268 |
|
|
|
1269 |
EXPORT_C TUsbStringDescriptor::TUsbStringDescriptor()
|
|
|
1270 |
{
|
|
|
1271 |
}
|
|
|
1272 |
|
|
|
1273 |
EXPORT_C /*static*/ TUsbStringDescriptor* TUsbStringDescriptor::Cast(TUsbGenericDescriptor* aOriginal)
|
|
|
1274 |
{
|
|
|
1275 |
TUsbStringDescriptor* ret = NULL;
|
|
|
1276 |
// Only cast if correctly indentified as string descriptor
|
|
|
1277 |
if( aOriginal &&
|
|
|
1278 |
aOriginal->ibDescriptorType == EString &&
|
|
|
1279 |
aOriginal->ibLength >= KStringDescriptorHeaderFieldLength &&
|
|
|
1280 |
aOriginal->iRecognisedAndParsed == ERecognised)
|
|
|
1281 |
{
|
|
|
1282 |
ret = static_cast<TUsbStringDescriptor*>(aOriginal);
|
|
|
1283 |
}
|
|
|
1284 |
return ret;
|
|
|
1285 |
}
|
|
|
1286 |
|
|
|
1287 |
/**
|
|
|
1288 |
For string descriptor zero, this function allows a means to iterate through the list of supported languages
|
|
|
1289 |
for strings on this device.
|
|
|
1290 |
|
|
|
1291 |
@param aIndex Index into language ID table.
|
|
|
1292 |
@return The language ID at the requested index, or KErrNotFound if the end of the list has been reached.
|
|
|
1293 |
Note that the language IDs are unsigned 16-bit numbers, while the return from this function is signed 32-bit.
|
|
|
1294 |
*/
|
|
|
1295 |
EXPORT_C TInt TUsbStringDescriptor::GetLangId(TInt aIndex) const
|
|
|
1296 |
{
|
|
|
1297 |
__ASSERT_ALWAYS(aIndex >= 0, UsbDescPanic(UsbdiPanics::EUsbDescNegativeIndexToLangId));
|
|
|
1298 |
const TUint8 KSizeOfLangIdField = 2;
|
|
|
1299 |
|
|
|
1300 |
TInt offset = KStringDescriptorHeaderFieldLength + KSizeOfLangIdField * aIndex;
|
|
|
1301 |
if(offset >= ibLength)
|
|
|
1302 |
{
|
|
|
1303 |
return KErrNotFound;
|
|
|
1304 |
}
|
|
|
1305 |
return ParseTUint16(iBlob, offset);
|
|
|
1306 |
}
|
|
|
1307 |
|
|
|
1308 |
/**
|
|
|
1309 |
Writes the string data into a Symbian descriptor of sufficient size.
|
|
|
1310 |
|
|
|
1311 |
@param aString The Symbian descriptor that will have the string data written into it.
|
|
|
1312 |
*/
|
|
|
1313 |
EXPORT_C void TUsbStringDescriptor::StringData(TDes16& aString) const
|
|
|
1314 |
{
|
|
|
1315 |
const TUint8 KUnicodeCharacterWidth = 2;
|
|
|
1316 |
aString.Zero();
|
|
|
1317 |
|
|
|
1318 |
TInt index = KStringDescriptorHeaderFieldLength;
|
|
|
1319 |
while(index+KUnicodeCharacterWidth <= ibLength)
|
|
|
1320 |
{
|
|
|
1321 |
aString.Append(ParseTUint16(iBlob, index));
|
|
|
1322 |
index += KUnicodeCharacterWidth;
|
|
|
1323 |
}
|
|
|
1324 |
}
|
|
|
1325 |
|
|
|
1326 |
|
|
|
1327 |
/*static*/ TUsbStringDescriptor* TUsbStringDescriptor::ParseL(TPtrC8& aUsbDes, TUsbGenericDescriptor* /*aPreviousDesc*/)
|
|
|
1328 |
{
|
|
|
1329 |
TUsbStringDescriptor* stringDes = NULL;
|
|
|
1330 |
|
|
|
1331 |
if( aUsbDes.Length() >= KStringDescriptorHeaderFieldLength &&
|
|
|
1332 |
aUsbDes[KbDescriptorTypeOffset] == EString)
|
|
|
1333 |
{
|
|
|
1334 |
TUint8 stringDesLen = aUsbDes[KbLengthOffset];
|
|
|
1335 |
|
|
|
1336 |
// Robustness check - check the length field is valid
|
|
|
1337 |
if(aUsbDes.Length() < stringDesLen || stringDesLen < KStringDescriptorHeaderFieldLength)
|
|
|
1338 |
{
|
|
|
1339 |
User::Leave(KErrCorrupt);
|
|
|
1340 |
}
|
|
|
1341 |
// Robustness check - check the length is a multiple of two.
|
|
|
1342 |
if(stringDesLen % 2 != 0)
|
|
|
1343 |
{
|
|
|
1344 |
User::Leave(KErrCorrupt);
|
|
|
1345 |
}
|
|
|
1346 |
|
|
|
1347 |
// Looks ok to be a string descriptor.
|
|
|
1348 |
stringDes = new(ELeave) TUsbStringDescriptor;
|
|
|
1349 |
// Set the standard fields
|
|
|
1350 |
stringDes->ibLength = stringDesLen;
|
|
|
1351 |
stringDes->ibDescriptorType = EString;
|
|
|
1352 |
// Set the blob appropriately
|
|
|
1353 |
stringDes->iBlob.Set(aUsbDes.Left(stringDesLen));
|
|
|
1354 |
|
|
|
1355 |
stringDes->iRecognisedAndParsed = ERecognised;
|
|
|
1356 |
|
|
|
1357 |
// Update the data-left-to-parse Symbian descriptor
|
|
|
1358 |
aUsbDes.Set(aUsbDes.Mid(stringDesLen));
|
|
|
1359 |
}
|
|
|
1360 |
|
|
|
1361 |
return stringDes;
|
|
|
1362 |
}
|
|
|
1363 |
|
|
|
1364 |
/**
|
|
|
1365 |
@internalComponent
|
|
|
1366 |
*/
|
|
|
1367 |
/*virtual*/ TBool TUsbStringDescriptor::IsParent(TUsbGenericDescriptor& /*aPotentialParent*/)
|
|
|
1368 |
{
|
|
|
1369 |
// String descriptors have no parents - they are standalone.
|
|
|
1370 |
return EFalse;
|
|
|
1371 |
}
|
|
|
1372 |
|
|
|
1373 |
/**
|
|
|
1374 |
@internalComponent
|
|
|
1375 |
*/
|
|
|
1376 |
/*virtual*/ TBool TUsbStringDescriptor::IsPeer(TUsbGenericDescriptor& /*aPotentialPeer*/)
|
|
|
1377 |
{
|
|
|
1378 |
// String descriptors have no peers - they are standalone.
|
|
|
1379 |
return EFalse;
|
|
|
1380 |
}
|
|
|
1381 |
|