author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 02:02:59 +0200 | |
changeset 0 | c9bc50fca66e |
child 15 | f92a4f87e424 |
permissions | -rw-r--r-- |
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/* |
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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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* |
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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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@released |
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*/ |
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#ifndef FDCINTERFACE_H |
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#define FDCINTERFACE_H |
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|
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#include <e32base.h> |
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class TUsbDeviceDescriptor; |
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class TUsbConfigurationDescriptor; |
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|
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/** |
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The UID of this FDC interface. |
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If the FDC API ever has to change, a new UID and associated M class will be |
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created. New FDC implementations may implement the new API. Old (non-updated) |
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FDCs will still work because the FDF examines at run-time which interfaces are |
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supported by any particular FDC. |
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*/ |
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const TInt KFdcInterfaceV1 = 0x10282B4C; |
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|
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/** |
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Mixin for the FDC API. |
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*/ |
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class MFdcInterfaceV1 |
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{ |
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public: |
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/** |
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Called when a device is attached. |
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|
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The Function Driver Framework has determined that this Function Driver is |
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the most suitable to drive at least one of the interfaces in the device's |
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selected configuration. |
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|
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Each call to this method represents an attempt by the Function Driver |
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Framework to get the Function Driver Controller to take ownership of |
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interfaces (exactly one Function) on the device. |
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|
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Not all the interfaces contained may be relevant to this Function Driver. |
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Some interfaces may be relevant to this Function Driver, but should *not* |
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be claimed in this call, as described below. |
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|
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The device's entire device descriptor and configuration descriptor are |
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given. |
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|
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The Function Driver Framework provides a collection (aInterfaces) of |
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interfaces which it is offering to the Function Driver Controller. The |
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Function Driver Controller MUST take ownership of the first of these by |
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calling MFdcPluginObserver::TokenForInterface (the Function Driver |
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Controller was selected by the Function Driver Framework on the basis of |
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its default_data field matching this particular interface). The Function |
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Driver Controller MUST also take ownership of as many following interfaces |
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as make up a single Function as defined by the relevant USB Class, again |
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by calling MFdcPluginObserver::TokenForInterface for them. |
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|
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The Function Driver Controller may examine interface descriptors for the |
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interfaces it is being offered using the bInterfaceNumber items in |
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aInterfaces, and the TUsbConfigurationDescriptor given |
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(aConfigurationDescriptor). |
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Once exactly one Function has been claimed, the Function Driver Controller |
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may return from this method. |
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The Function Driver Framework does not make further attempts to load |
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Function Drivers for the interfaces that have been claimed, whether an |
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error is returned or not. |
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If an error is returned, then (a) the FDF will send a driver loading error |
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to USBMAN, and (b) the FDC must not have opened ANY RUsbInterfaces as a |
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result of this call to Mfi1NewFunction. |
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It is important for the Function Driver Controller to claim all the |
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interfaces it should, even if it finds out early on that it won't be able |
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to handle the Function for environmental or other reasons. |
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The FDC may also return an error indicating that the Class-specific |
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descriptors are incorrectly formatted. |
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|
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The FD is not required to open RUsbInterface handles during |
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Mfi1NewFunction. If it does, then it can pass any failure back as a return |
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value to Mfi1NewFunction and this will be relayed to USBMAN as a driver |
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loading error. If it does not, then the FD must itself take responsibility |
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for relaying relevant failures to the user. (This is in aid of the 'no |
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silent failures' requirement.) |
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|
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This method may be called zero or more times for each device attached, |
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depending on the interfaces present in the device's active configuration |
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and on the other FDs present on the phone. If this function is called (and |
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returns KErrNone) one or more times on a particular FDC, then |
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Mfi1DeviceDetached will be called exactly once when the device is detached. |
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If on device attachment this function is called one or more times for a |
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particular FDC, and each time the FDC returns an error, then no device |
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detachment notification will be given to that FDC. Hence any RUsbInterface |
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handles successfully opened in a call to this function should be cleaned |
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up immediately if the function returns error. |
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111 |
|
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@see MFdcPluginObserver::TokenForInterface. |
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113 |
|
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@param aDeviceId This is the ID of the new device. This identifier is |
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private between the Function Driver Framework and the Function Driver. Its |
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significance is to identify a device when it is removed (see |
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Mfi1DeviceDetached). It is not equivalent to the device address or to |
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anything else. |
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119 |
|
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@param aInterfaces A collection of interface numbers (bInterfaceNumber) |
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which are being offered to the Function Driver Controller. The Function |
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Driver Controller uses items in this array in calls to |
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MFdcPluginObserver::TokenForInterface. Ownership of the array is retained |
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by the FDF. |
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125 |
|
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@param aDeviceDescriptor The device descriptor of the device. Ownership is |
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retained by the FDF. |
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128 |
|
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@param aConfigurationDescriptor The selected configuration descriptor of |
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the device. Ownership is retained by the FDF. |
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131 |
|
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@return Error. On return (ANY error code), the interfaces claimed in calls |
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to MFdcPluginObserver::TokenForInterface are claimed by this FDC. If an |
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error is returned, the FDC must cause no interface handles to be opened as |
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a result of this call. The FDF will indicate a failure to load drivers to |
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USBMAN. |
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*/ |
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virtual TInt Mfi1NewFunction(TUint aDeviceId, |
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const TArray<TUint>& aInterfaces, |
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const TUsbDeviceDescriptor& aDeviceDescriptor, |
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const TUsbConfigurationDescriptor& aConfigurationDescriptor) = 0; |
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142 |
|
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/** |
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Called when a device is detached. |
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The device is one of those which have previously been notified to the |
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Function Driver in a Mfi1NewFunction call. |
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Any RUsbInterface handles which were opened as a result of the |
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corresponding earlier Mfi1NewFunction call should be closed as they |
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will be useless. |
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150 |
|
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@param aDeviceId This serves to identify the device which has disappeared. |
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This will be the device ID given in a previously completed |
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Mfi1NewFunction call. |
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*/ |
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virtual void Mfi1DeviceDetached(TUint aDeviceId) = 0; |
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}; |
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157 |
|
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#endif // FDCINTERFACE_H |