BOOL PXA271_USB_Driver::StartOutput( USB_CONTROLLER_STATE* State, int endpoint )
{
ASSERT( State );
ASSERT(endpoint < c_Used_Endpoints);
GLOBAL_LOCK(irq);
// If endpoint is not an output
if( State->Queues[endpoint] == NULL || !State->IsTxQueue[endpoint] )
return FALSE;
/* if the halt feature for this endpoint is set, then just
clear all the characters */
if(State->EndpointStatus[endpoint] & USB_STATUS_ENDPOINT_HALT)
{
ClearTxQueue( State, endpoint );
return TRUE;
}
//If TxRunning, interrupts will drain the queue
if(!g_PXA271_USB_Driver.TxRunning[endpoint])
{
g_PXA271_USB_Driver.TxRunning[endpoint] = TRUE;
// Calling both TxPacket & EP_TxISR in this routine could cause a TX FIFO overflow
TxPacket( State, endpoint );
}
else if(irq.WasDisabled())
{
PXA271_USB& USB = PXA271::USB();
// This could be called during Flush with all interrupts off. Just taking care of the endpoint
// in question may cause a logjam if the host is expecting a response from another endpoint.
// All endpoints must be examined for activity.
if( USB.UDCISR0 & USB.UDCICR0 & USB.UDCICR__BOTH ) // If endpoint 0 needs attention
EP0_ISR( 0 );
for( int ep = 1; ep < c_Used_Endpoints; ep++ )
{
// If no interrupt for this endpoint
if( (((USB.UDCISR0 & USB.UDCICR0) >> (ep * 2)) & USB.UDCICR__BOTH) == 0 )
continue;
if(State->Queues[ep])
{
if( State->IsTxQueue[endpoint] )
EP_TxISR( endpoint );
else
EP_RxISR( endpoint );
}
}
}
BOOL AT91_USBHS_Driver::StartOutput( USB_CONTROLLER_STATE* State, int endpoint )
{
ASSERT(State);
ASSERT(endpoint < c_Used_Endpoints);
GLOBAL_LOCK(irq);
struct AT91_UDPHS *pUdp = (struct AT91_UDPHS *) AT91C_BASE_UDP;
// If endpoint is not an output
if( State->Queues[endpoint] == NULL || !State->IsTxQueue[endpoint] )
return FALSE;
pUdp->UDPHS_IEN |= 1 << SHIFT_INTERUPT << endpoint;
pUdp->UDPHS_EPT[endpoint].UDPHS_EPTCTLENB = AT91C_UDPHS_TX_PK_RDY;
/* if the halt feature for this endpoint is set, then just
clear all the characters */
if(g_AT91_USBHS_Driver.EndpointStatus[endpoint] & USB_STATUS_ENDPOINT_HALT)
{
ClearTxQueue( State, endpoint );
return TRUE;
}
//If TxRunning, interrupts will drain the queue
if(!(BOOL)((UINT8)g_AT91_USBHS_Driver.TxRunning[endpoint]))
{
num_ep_int1++;
g_AT91_USBHS_Driver.TxRunning[endpoint] = TRUE;
TxPacket( State, endpoint );
}
else if(irq.WasDisabled()) // We should not call EP_TxISR after calling TxPacket becuase it can cause a TX FIFO overflow error.
{
Endpoint_ISR(endpoint);
}
return TRUE;
}
