Re-add in old Endpoint/Pipe workaround for unordered pipes - add new ORDERED_EP_CONFIG compile time option to override the workaround and use the previous behaviour that imposes correct Endpoint/Pipe ordering but produces smaller compiled code.

LUFA/Drivers/USB/LowLevel/Endpoint.c

@@ -43,6 +43,7 @@ bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number,
                                     const uint8_t UECFG0XData,
                                     const uint8_t UECFG1XData)
 {
+#if defined(CONTROL_ONLY_DEVICE) || defined(ORDERED_EP_CONFIG)
 	Endpoint_SelectEndpoint(Number);
 	Endpoint_EnableEndpoint();
 
@@ -51,6 +52,51 @@ bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number,
 	UECFG1X = UECFG1XData;
 
 	return Endpoint_IsConfigured();
+#else
+	uint8_t UECFG0XTemp[ENDPOINT_TOTAL_ENDPOINTS];
+	uint8_t UECFG1XTemp[ENDPOINT_TOTAL_ENDPOINTS];
+	uint8_t UEIENXTemp[ENDPOINT_TOTAL_ENDPOINTS];
+	
+	for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
+	{
+		Endpoint_SelectEndpoint(EPNum);
+		UECFG0XTemp[EPNum] = UECFG0X;
+		UECFG1XTemp[EPNum] = UECFG1X;
+		UEIENXTemp[EPNum]  = UEIENX;
+	}
+	
+	UECFG0XTemp[Number] = UECFG0XData;
+	UECFG1XTemp[Number] = UECFG1XData;
+	UEIENXTemp[Number]  = 0;
+	
+	for (uint8_t EPNum = 1; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
+	{
+		Endpoint_SelectEndpoint(EPNum);	
+		UEIENX  = 0;
+		UEINTX  = 0;
+		UECFG1X = 0;
+		Endpoint_DisableEndpoint();
+	}
+
+	for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
+	{
+		if (!(UECFG1XTemp[EPNum] & (1 << ALLOC)))
+		  continue;
+		
+		Endpoint_SelectEndpoint(EPNum);		
+		Endpoint_EnableEndpoint();
+
+		UECFG0X = UECFG0XTemp[EPNum];
+		UECFG1X = UECFG1XTemp[EPNum];
+		UEIENX  = UEIENXTemp[EPNum];
+		
+		if (!(Endpoint_IsConfigured()))
+		  return false;
+	}
+	
+	Endpoint_SelectEndpoint(Number);
+	return true;
+#endif
 }
 
 void Endpoint_ClearEndpoints(void)

LUFA/Drivers/USB/LowLevel/Endpoint.h

@@ -273,7 +273,8 @@
 			 *                        More banks uses more USB DPRAM, but offers better performance. Isochronous type
 			 *                        endpoints <b>must</b> have at least two banks.
 			 *
-			 *  \note Endpoints <b>must</b> be configured in ascending order, or bank corruption will occur.
+			 *  \note When the ORDERED_EP_CONFIG compile time option is used, Endpoints <b>must</b> be configured in ascending
+			 *        order, or bank corruption will occur.
 			 *        \n\n
 			 *
 			 *  \note Certain models of USB AVR's endpoints may have different maximum packet sizes based on the endpoint's

LUFA/Drivers/USB/LowLevel/Pipe.c

@@ -44,6 +44,7 @@ bool Pipe_ConfigurePipe(const uint8_t Number,
                         const uint16_t Size,
                         const uint8_t Banks)
 {
+#if defined(ORDERED_EP_CONFIG)
 	Pipe_SelectPipe(Number);
 	Pipe_EnablePipe();
 
@@ -55,6 +56,63 @@ bool Pipe_ConfigurePipe(const uint8_t Number,
 	Pipe_SetInfiniteINRequests();
 
 	return Pipe_IsConfigured();
+#else
+	uint8_t UPCFG0XTemp[PIPE_TOTAL_PIPES];
+	uint8_t UPCFG1XTemp[PIPE_TOTAL_PIPES];
+	uint8_t UPCFG2XTemp[PIPE_TOTAL_PIPES];
+	uint8_t UPCONXTemp[PIPE_TOTAL_PIPES];
+	uint8_t UPINRQXTemp[PIPE_TOTAL_PIPES];
+	uint8_t UPIENXTemp[PIPE_TOTAL_PIPES];
+	
+	for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
+	{
+		Pipe_SelectPipe(PNum);
+		UPCFG0XTemp[PNum] = UPCFG0X;
+		UPCFG1XTemp[PNum] = UPCFG1X;
+		UPCFG2XTemp[PNum] = UPCFG2X;
+		UPCONXTemp[PNum]  = UPCONX;
+		UPINRQXTemp[PNum] = UPINRQX;
+		UPIENXTemp[PNum]  = UPIENX;
+	}
+	
+	UPCFG0XTemp[Number] = ((Type << EPTYPE0) | Token | ((EndpointNumber & PIPE_EPNUM_MASK) << PEPNUM0));
+	UPCFG1XTemp[Number] = ((1 << ALLOC) | Banks | Pipe_BytesToEPSizeMask(Size));
+	UPCFG2XTemp[Number] = 0;
+	UPCONXTemp[Number]  = (1 << INMODE);
+	UPINRQXTemp[Number] = 0;
+	UPIENXTemp[Number]  = 0;
+	
+	for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
+	{
+		Pipe_SelectPipe(PNum);
+		UPIENX  = 0;
+		UPINTX  = 0;
+		UPCFG1X = 0;
+		Pipe_DisablePipe();
+	}
+
+	for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
+	{
+		if (!(UPCFG1XTemp[PNum] & (1 << ALLOC)))
+		  continue;
+		
+		Pipe_SelectPipe(PNum);		
+		Pipe_EnablePipe();
+
+		UPCFG0X  = UPCFG0XTemp[PNum];
+		UPCFG1X  = UPCFG1XTemp[PNum];
+		UPCFG2X  = UPCFG2XTemp[PNum];
+		UPCONX  |= UPCONXTemp[PNum];
+		UPINRQX  = UPINRQXTemp[PNum];
+		UPIENX   = UPIENXTemp[PNum];
+
+		if (!(Pipe_IsConfigured()))
+		  return false;
+	}
+		
+	Pipe_SelectPipe(Number);	
+	return true;
+#endif
 }
 
 void Pipe_ClearPipes(void)

LUFA/Drivers/USB/LowLevel/Pipe.h

@@ -861,7 +861,8 @@
 			 *                             uses more USB DPRAM, but offers better performance. Isochronous type pipes <b>must</b>
 			 *                             have at least two banks.
 			 *
-			 *  \note Endpoints <b>must</b> be configured in ascending order, or bank corruption will occur.
+			 *  \note When the ORDERED_EP_CONFIG compile time option is used, Pipes <b>must</b> be configured in ascending order,
+			 *        or bank corruption will occur.
 			 *        \n\n
 			 *
 			 *  \note Certain models of USB AVR's pipes may have different maximum packet sizes based on the pipe's

LUFA/Drivers/USB/LowLevel/USBController.c

@@ -152,6 +152,7 @@ void USB_ResetInterface(void)
 	{
 		#if defined(USB_CAN_BE_HOST)
 		UHWCON &= ~(1 << UIMOD);
+
 		USB_Init_Host();
 		#endif
 	}