Update LUFA core to be compatible with the AVR-GCC -Wswitch-default warning switch.

BuildTests/ModuleTest/makefile.test

@@ -45,6 +45,7 @@ CC_FLAGS += -Wmissing-declarations
 CC_FLAGS += -Wmissing-field-initializers
 CC_FLAGS += -Wmissing-format-attribute
 CC_FLAGS += -Woverlength-strings
+CC_FLAGS += -Wswitch-default
 
 # Only enable rendundant declaration warnings for AVR8 target (FIXME)
 ifeq ($(ARCH), AVR8)
@@ -56,7 +57,6 @@ C_FLAGS += -Wmissing-parameter-type
 C_FLAGS += -Wnested-externs
 
 # Potential additional warnings to enable in the future (FIXME)
-#CC_FLAGS += -Wswitch-default
 #CC_FLAGS += -Wc++-compat
 #CC_FLAGS += -Wcast-qual
 #CC_FLAGS += -Wconversion

LUFA/Drivers/USB/Class/Common/HIDParser.c

@@ -53,7 +53,7 @@ uint8_t USB_ProcessHIDReport(const uint8_t* ReportData,
 	while (ReportSize)
 	{
 		uint8_t  HIDReportItem  = *ReportData;
-		uint32_t ReportItemData = 0;
+		uint32_t ReportItemData;
 
 		ReportData++;
 		ReportSize--;
@@ -66,16 +66,22 @@ uint8_t USB_ProcessHIDReport(const uint8_t* ReportData,
 				ReportSize     -= 4;
 				ReportData     += 4;
 				break;
+
 			case HID_RI_DATA_BITS_16:
 				ReportItemData  = (((uint16_t)ReportData[1] << 8) | (ReportData[0]));
 				ReportSize     -= 2;
 				ReportData     += 2;
 				break;
+
 			case HID_RI_DATA_BITS_8:
 				ReportItemData  = ReportData[0];
 				ReportSize     -= 1;
 				ReportData     += 1;
 				break;
+
+			default:
+				ReportItemData  = 0;
+				break;
 		}
 
 		switch (HIDReportItem & (HID_RI_TYPE_MASK | HID_RI_TAG_MASK))
@@ -269,6 +275,9 @@ uint8_t USB_ProcessHIDReport(const uint8_t* ReportData,
 				}
 
 				break;
+			
+			default:
+				break;
 		}
 
 		if ((HIDReportItem & HID_RI_TYPE_MASK) == HID_RI_TYPE_MAIN)

LUFA/Drivers/USB/Core/AVR8/Host_AVR8.c

@@ -180,6 +180,9 @@ void USB_Host_ProcessNextHostState(void)
 
 			EVENT_USB_Host_DeviceEnumerationComplete();
 			break;
+
+		default:
+			break;
 	}
 
 	if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached))

LUFA/Drivers/USB/Core/AVR8/USBInterrupt_AVR8.h

@@ -139,6 +139,8 @@
 						OTGIEN |= (1 << SRPE);
 						break;
 					#endif
+					default:
+						break;
 				}
 			}
 
@@ -197,6 +199,8 @@
 						OTGIEN &= ~(1 << SRPE);
 						break;
 					#endif
+					default:
+						break;
 				}
 			}
 
@@ -255,6 +259,8 @@
 						OTGINT &= ~(1 << SRPI);
 						break;
 					#endif
+					default:
+						break;
 				}
 			}
 
@@ -299,10 +305,10 @@
 					case USB_INT_SRPI:
 						return (OTGIEN & (1 << SRPE));
 					#endif
-				}
+					default:
-
 						return false;
 				}
+			}
 
 			static inline bool USB_INT_HasOccurred(const uint8_t Interrupt) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 			static inline bool USB_INT_HasOccurred(const uint8_t Interrupt)
@@ -345,10 +351,10 @@
 					case USB_INT_SRPI:
 						return (OTGINT & (1 << SRPI));
 					#endif
-				}
+					default:
-
 						return false;
 				}
+			}
 
 		/* Includes: */
 			#include "../USBMode.h"

LUFA/Drivers/USB/Core/DeviceStandardReq.c

@@ -109,6 +109,9 @@ void USB_Device_ProcessControlRequest(void)
 				  USB_Device_SetConfiguration();
 
 				break;
+
+			default:
+				break;
 		}
 	}
 

LUFA/Drivers/USB/Core/UC3/Host_UC3.c

@@ -180,6 +180,9 @@ void USB_Host_ProcessNextHostState(void)
 
 			EVENT_USB_Host_DeviceEnumerationComplete();
 			break;
+			
+		default:
+			break;
 	}
 
 	if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached))

LUFA/Drivers/USB/Core/UC3/USBInterrupt_UC3.h

@@ -134,6 +134,8 @@
 						AVR32_USBB.USBCON.vberre      = true;
 						break;
 					#endif
+					default:
+						break;
 				}
 			}
 
@@ -187,6 +189,8 @@
 						AVR32_USBB.USBCON.vberre      = false;
 						break;
 					#endif
+					default:
+						break;
 				}
 			}
 
@@ -252,6 +256,8 @@
 						(void)AVR32_USBB.USBSTACLR;
 						break;
 					#endif
+					default:
+						break;
 				}
 			}
 
@@ -292,10 +298,10 @@
 					case USB_INT_VBERRI:
 						return AVR32_USBB.USBCON.vberre;
 					#endif
-				}
+					default:
-
 						return false;
 				}
+			}
 
 			static inline bool USB_INT_HasOccurred(const uint8_t Interrupt) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 			static inline bool USB_INT_HasOccurred(const uint8_t Interrupt)
@@ -334,10 +340,10 @@
 					case USB_INT_VBERRI:
 						return AVR32_USBB.USBSTA.vberri;
 					#endif
-				}
+					default:
-
 						return false;
 				}
+			}
 
 		/* Includes: */
 			#include "../USBMode.h"

LUFA/Drivers/USB/Core/XMEGA/USBInterrupt_XMEGA.h

@@ -74,10 +74,12 @@
 				{
 					case USB_INT_BUSEVENTI:
 						USB.INTCTRLA |= USB_BUSEVIE_bm;
-						return;
+						break;
 					case USB_INT_SOFI:
 						USB.INTCTRLA |= USB_SOFIE_bm;
-						return;
+						break;
+					default:
+						break;
 				}
 			}
 
@@ -88,10 +90,12 @@
 				{
 					case USB_INT_BUSEVENTI:
 						USB.INTCTRLA &= ~USB_BUSEVIE_bm;
-						return;
+						break;
 					case USB_INT_SOFI:
 						USB.INTCTRLA &= ~USB_SOFIE_bm;
-						return;
+						break;
+					default:
+						break;
 				}
 			}
 
@@ -102,16 +106,18 @@
 				{
 					case USB_INT_BUSEVENTI_Suspend:
 						USB.INTFLAGSACLR = USB_SUSPENDIF_bm;
-						return;
+						break;
 					case USB_INT_BUSEVENTI_Resume:
 						USB.INTFLAGSACLR = USB_RESUMEIF_bm;
-						return;
+						break;
 					case USB_INT_BUSEVENTI_Reset:
 						USB.INTFLAGSACLR = USB_RSTIF_bm;
-						return;
+						break;
 					case USB_INT_SOFI:
 						USB.INTFLAGSACLR = USB_SOFIF_bm;
-						return;
+						break;
+					default:
+						break;
 				}
 			}
 
@@ -124,10 +130,10 @@
 						return ((USB.INTCTRLA & USB_BUSEVIE_bm) ? true : false);
 					case USB_INT_SOFI:
 						return ((USB.INTCTRLA & USB_SOFIE_bm) ? true : false);
-				}
+					default:
-
 						return false;
 				}
+			}
 
 			static inline bool USB_INT_HasOccurred(const uint8_t Interrupt) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 			static inline bool USB_INT_HasOccurred(const uint8_t Interrupt)
@@ -142,10 +148,10 @@
 						return ((USB.INTFLAGSACLR & USB_RSTIF_bm) ? true : false);
 					case USB_INT_SOFI:
 						return ((USB.INTFLAGSACLR & USB_SOFIF_bm) ? true : false);
-				}
+					default:
-
 						return false;
 				}
+			}
 
 		/* Includes: */
 			#include "../USBMode.h"

LUFA/Platform/XMEGA/ClockManagement.h

@@ -188,10 +188,10 @@
 						OSC.CTRL |= OSC_RC32KEN_bm;
 						while (!(OSC.STATUS & OSC_RC32KRDY_bm));
 						return true;
-				}
+					default:
-
 						return false;
 				}
+			}
 
 			/** Stops the given internal oscillator of the XMEGA microcontroller.
 			 *
@@ -213,10 +213,10 @@
 					case CLOCK_SRC_INT_RC32KHZ:
 						OSC.CTRL &= ~OSC_RC32KEN_bm;
 						return true;
-				}
+					default:
-
 						return false;
 				}
+			}
 
 			/** Starts the PLL of the XMEGA microcontroller, with the given options. This routine blocks until the PLL is ready for use.
 			 *