void _USB_DEVICE_AUDIO_IRPCancelAll(USB_DEVICE_AUDIO_INDEX iAudio)
{
USB_DEVICE_AUDIO_INSTANCE * thisAudioInstance = &gUsbDeviceAudioInstance[iAudio];
uint8_t noOfStreamingInterface;
uint8_t count;
uint8_t activeInterfaceSetting;
USB_DEVICE_AUDIO_STREAMING_INTERFACE* streamingInterface;
uint8_t endpointAddress;
/* Find out howmany Streaming interfaces are supported by this Audio Instance*/
noOfStreamingInterface = thisAudioInstance->infCollection.numStreamingInf;
/* We have to cancel IRPs submitted for all of the streams */
for (count=0; count < noOfStreamingInterface; count++)
{
/* Get pointer current streaing interface */
streamingInterface = &thisAudioInstance->infCollection.streamInf[count];
/* Find out active alternate setting*/
activeInterfaceSetting = streamingInterface->activeSetting;
if (streamingInterface->alterntSetting[activeInterfaceSetting].numEndPoints)
{
/* Retrive Isochronus Data Endpoint address */
endpointAddress = streamingInterface->alterntSetting[activeInterfaceSetting].isoDataEp.epAddr;
/* Double if this not Endpoint 0*/
if (endpointAddress !=0)
{
/* Cancel all IRPs on this Endpoint */
USB_DEVICE_IRPCancelAll(gUsbDeviceAudioInstance[iAudio].devLayerHandle, endpointAddress);
}
if (streamingInterface->alterntSetting[activeInterfaceSetting].numEndPoints == 2)
{
/* If there are Two Endpoints, second Endpoint is a Sync Endpoint */
endpointAddress = streamingInterface->alterntSetting[activeInterfaceSetting].isoSyncEp.epAddr;
/* Double if this not Endpoint 0*/
if (endpointAddress !=0)
{
/* Cancel all IRPs on this Endpoint */
USB_DEVICE_IRPCancelAll(gUsbDeviceAudioInstance[iAudio].devLayerHandle, endpointAddress);
}
}
}
}
}
/******************************************************************************
Function:
USB_DEVICE_RESULT USB_DEVICE_EndpointTransferCancel
(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT_ADDRESS endpoint,
USB_DEVICE_TRANSFER_HANDLE transferHandle
);
Summary:
This function cancels a transfer scheduled on an endpoint.
Description:
Refer to usb_device.h for usage information.
Returns:
Refer to usb_device.h for usage information.
*/
USB_DEVICE_RESULT USB_DEVICE_EndpointTransferCancel
(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT_ADDRESS endpoint,
USB_DEVICE_TRANSFER_HANDLE transferHandle
)
{
USB_DEVICE_OBJ* devClientHandle;
USB_DEVICE_IRP * irp ;
USB_ERROR irpCancelError;
/* Validate the handle */
devClientHandle = _USB_DEVICE_ClientHandleValidate(usbDeviceHandle);
if (devClientHandle == NULL)
{
SYS_DEBUG(0, "USB Device Layer: Invalid Client Handle");
return(USB_DEVICE_RESULT_ERROR_DEVICE_HANDLE_INVALID);
}
if (transferHandle == USB_DEVICE_TRANSFER_HANDLE_INVALID)
{
SYS_DEBUG(0, "USB_Device_Endpoint_Transfer_Cancel: Invalid Transfer Handle");
return USB_DEVICE_RESULT_ERROR;
}
irp = (USB_DEVICE_IRP*)transferHandle;
if (irp->status == USB_DEVICE_IRP_STATUS_PENDING)
{
irpCancelError = USB_DEVICE_IRPCancelAll(devClientHandle,endpoint );
return irpCancelError;
}
SYS_DEBUG(0, "USB_Device_Endpoint_Transfer_Cancel: Transfer could not be cancelled");
return USB_DEVICE_RESULT_ERROR;
}
void _USB_DEVICE_CDC_EndpointDisable
(
USB_DEVICE_HANDLE deviceHandle,
USB_DEVICE_CDC_ENDPOINT * deviceCDCEndpoint
)
{
if(deviceCDCEndpoint->isConfigured)
{
USB_DEVICE_IRPCancelAll(deviceHandle, deviceCDCEndpoint->address);
USB_DEVICE_EndpointDisable(deviceHandle, deviceCDCEndpoint->address);
deviceCDCEndpoint->isConfigured = false;
}
}
/* Function:
void _USB_DEVICE_AUDIO_SetupPacketHandler
(
USB_DEVICE_AUDIO_INDEX iAudio ,
USB_SETUP_PACKET * setupPkt
)
Summary:
Handles a fresh SETUP packet received from Host.
Description:
Handles a fresh SETUP packet received from Host.
Returns:
This is a local function and should not be called directly by the
application.
*/
void _USB_DEVICE_AUDIO_SetupPacketHandler
(
USB_DEVICE_AUDIO_INDEX iAudio ,
USB_SETUP_PACKET * setupPkt
)
{
uint8_t audioControlInterfaceId;
uint8_t interfaceId;
uint8_t curAlternateSetting;
uint8_t prevAlternateSetting;
uint8_t streamIntfcIndex;
uint8_t noOfEndpoints;
USB_ENDPOINT ep;
uint16_t maxPacketSize;
USB_DEVICE_HANDLE usbDeviceHandle;
USB_DEVICE_AUDIO_EVENT event;
USB_DEVICE_AUDIO_EVENT_DATA_INTERFACE_SETTING_CHANGED interfaceInfo;
USB_ERROR endpointEnableResult;
USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNATE_SETTING *pCurAlternateStng;
USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNATE_SETTING *pPrevAlternateStng;
USB_DEVICE_AUDIO_STREAMING_INTERFACE *pStreamingInterface;
uint16_t adjustedMaxPacketSize =1;
/* Obtain pointer to the Audio Instance that is being addressed*/
USB_DEVICE_AUDIO_INSTANCE* audioInstance = &gUsbDeviceAudioInstance[iAudio];
/* Obtain pointer to the Audio Interface collection*/
USB_DEVICE_AUDIO_INTERFACE_COLLECTION *curInfCollection =
&(audioInstance->infCollection);
/* Get the Device Layer handle */
usbDeviceHandle = gUsbDeviceAudioInstance[iAudio].devLayerHandle;
/* Check if the request is a standard interface request*/
if ( (setupPkt->RequestType == USB_SETUP_REQUEST_TYPE_STANDARD)
&& (setupPkt->Recipient == USB_SETUP_REQUEST_RECIPIENT_INTERFACE))
{
/* We have received Standard Set request */
/* retrieve interface number from the Setup packet */
interfaceId = setupPkt->bIntfID;
/* retrieve audio Control interface number*/
audioControlInterfaceId = curInfCollection->bControlInterfaceNum;
switch(setupPkt->bRequest)
{
case USB_REQUEST_SET_INTERFACE:
curAlternateSetting = setupPkt->bAltID;
if (interfaceId == audioControlInterfaceId)
{
/*SET INTERFACE command was received to Audio Control
Interface */
curInfCollection->bControlAltSetng = curAlternateSetting;
}
else
{
/*An Audio Streaming interface has received SET INTERFACE
command */
streamIntfcIndex = interfaceId - audioControlInterfaceId - 1;
/* Get pointer to the current audio streaming interface */
pStreamingInterface = &(curInfCollection->streamInf[streamIntfcIndex]);
/* Get pointer to the Interface Alternate setting. */
pCurAlternateStng
= &(pStreamingInterface->alterntSetting[curAlternateSetting]);
/* Find out how many endpoint are present for this Interface
* Alternate setting */
noOfEndpoints = pCurAlternateStng->numEndPoints;
if ((noOfEndpoints) && (curAlternateSetting))
{
/* We have to enable the endpoint only if this alternate
setting has at least one endpoint and the alternate
setting is a non zero value */
/*Retrieve endpoint size */
ep = pCurAlternateStng->isoDataEp.epAddr;
/* retrieve max packet size. */
maxPacketSize
= pCurAlternateStng->isoDataEp.epMaxPacketSize;
/* maxpacket size should be adjusted to upper power of
two. As per the PIC32MZ USB module requirement.*/
if (maxPacketSize)
{
while(adjustedMaxPacketSize < maxPacketSize)
adjustedMaxPacketSize <<= 1;
}
else
adjustedMaxPacketSize = 0;
/* Enable Isochronous Data Endpoint */
endpointEnableResult = USB_DEVICE_EndpointEnable
(
usbDeviceHandle ,
0,
ep ,
USB_TRANSFER_TYPE_ISOCHRONOUS ,
adjustedMaxPacketSize
);
if (endpointEnableResult != USB_ERROR_NONE)
{
SYS_ASSERT (false, "Endpoint not Enabled");
}
if (noOfEndpoints == 2)
{
/* If number of Endpoints is Two, then it is sure
* that this alternate setting reports a Isochronous
* Sync Endpoint. Enable the Sync Endpoint. */
}
//Change Audio Instance object state to Initialized.
pStreamingInterface->state
= USB_DEVICE_AUDIO_STRMNG_INTFC_INITIALIZED;
}
else //alternateSetting = 0
{
if (pStreamingInterface->state
== USB_DEVICE_AUDIO_STRMNG_INTFC_INITIALIZED)
{
//Disable the Endpoint in the previous Active Alternate setting.
prevAlternateSetting = pStreamingInterface->activeSetting;
//get a pointer to the previous alternate setting.
pPrevAlternateStng = &(pStreamingInterface->alterntSetting[prevAlternateSetting]);
//Get endpoint no of the previous alternate setting
ep = pPrevAlternateStng->isoDataEp.epAddr;
//Disable the Endpoint
USB_DEVICE_EndpointDisable(usbDeviceHandle ,ep);
if (noOfEndpoints == 2)
{
/* If number of Endpoints is Two, then it is sure
* that this alternate setting reports a Isochronous
* Sync Endpoint. Disable the Sync Endpoint. */
}
curInfCollection->streamInf[streamIntfcIndex].state
= USB_DEVICE_AUDIO_STRMNG_INTFC_NOT_INITIALIZED;
USB_DEVICE_IRPCancelAll(usbDeviceHandle, ep);
}
}
/* Remember the new alternate setting received */
curInfCollection->streamInf[streamIntfcIndex].activeSetting
= curAlternateSetting;
/* Notify application about the SET_INTERFACE request */
interfaceInfo.interfaceNumber = interfaceId;
interfaceInfo.interfaceAlternateSetting = curAlternateSetting;
audioInstance->appEventCallBack
(
iAudio,
USB_DEVICE_AUDIO_EVENT_INTERFACE_SETTING_CHANGED,
&interfaceInfo,
0
);
}
/* Send an Acknowledgement to the Host */
USB_DEVICE_ControlStatus( usbDeviceHandle,
USB_DEVICE_CONTROL_STATUS_OK);
break;
case USB_REQUEST_GET_INTERFACE:
if (interfaceId == audioControlInterfaceId)
{
curAlternateSetting = curInfCollection->bControlAltSetng;
}
else
{
streamIntfcIndex = interfaceId - audioControlInterfaceId - 1;
curAlternateSetting
= curInfCollection->streamInf[streamIntfcIndex].activeSetting;
}
USB_DEVICE_ControlSend( usbDeviceHandle,
(void *)&curAlternateSetting, 1);
break;
default:
break;
}
}//end of if((setupPkt->bmRequestType ==
else if ( (setupPkt->RequestType == USB_SETUP_REQUEST_TYPE_CLASS )
&& (setupPkt->Recipient == USB_SETUP_REQUEST_RECIPIENT_INTERFACE))
{
/* We have recived a Audio Class specific Interface request */
switch (setupPkt->bRequest)
{
case USB_AUDIO_CS_SET_CUR:
event = USB_DEVICE_AUDIO_EVENT_CONTROL_SET_CUR;
break;
case USB_AUDIO_CS_GET_CUR:
event = USB_DEVICE_AUDIO_EVENT_CONTROL_GET_CUR;
break;
case USB_AUDIO_CS_SET_MIN:
event = USB_DEVICE_AUDIO_EVENT_CONTROL_SET_MIN;
break;
case USB_AUDIO_CS_GET_MIN:
event = USB_DEVICE_AUDIO_EVENT_CONTROL_GET_MIN;
break;
case USB_AUDIO_CS_SET_MAX:
event = USB_DEVICE_AUDIO_EVENT_CONTROL_SET_MAX;
break;
case USB_AUDIO_CS_GET_MAX:
event = USB_DEVICE_AUDIO_EVENT_CONTROL_GET_MAX;
break;
case USB_AUDIO_CS_SET_RES:
event = USB_DEVICE_AUDIO_EVENT_CONTROL_SET_RES;
break;
case USB_AUDIO_CS_GET_RES:
event = USB_DEVICE_AUDIO_EVENT_CONTROL_GET_RES;
break;
case USB_AUDIO_CS_SET_MEM:
event = USB_DEVICE_AUDIO_EVENT_ENTITY_SET_MEM;
break;
case USB_AUDIO_CS_GET_MEM:
event = USB_DEVICE_AUDIO_EVENT_ENTITY_GET_MEM;
break;
case USB_AUDIO_CS_GET_STAT:
event = USB_DEVICE_AUDIO_EVENT_ENTITY_GET_STAT;
break;
default:
/* Unknown request. Stall the request */
event = 0;
USB_DEVICE_ControlStatus(audioInstance->devLayerHandle,
USB_DEVICE_CONTROL_STATUS_ERROR);
}
if (( audioInstance->appEventCallBack) && (event))
{
/* inform the application about the request */
/* the application needs to handle both EP and entity specific
requests */
audioInstance->appEventCallBack ( iAudio, event, setupPkt, 0);
}
}// end of else if
}//end of function _USB_DEVICE_AUDIO_SetupPacketHandler
