diff --git a/build_keyboard.mk b/build_keyboard.mk
index bfadede37..410870487 100644
--- a/build_keyboard.mk
+++ b/build_keyboard.mk
@@ -244,34 +244,6 @@ else
     FIRMWARE_FORMAT?=hex
 endif
 
-ifeq ($(PLATFORM),CHIBIOS)
-    include $(TMK_PATH)/chibios.mk
-    OPT_OS = chibios
-    ifneq ("$(wildcard $(KEYBOARD_PATH_5)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_5)/bootloader_defs.h
-     else ifneq ("$(wildcard $(KEYBOARD_PATH_5)/boards/$(BOARD)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_5)/boards/$(BOARD)/bootloader_defs.h
-    else ifneq ("$(wildcard $(KEYBOARD_PATH_4)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_4)/bootloader_defs.h
-     else ifneq ("$(wildcard $(KEYBOARD_PATH_4)/boards/$(BOARD)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_4)/boards/$(BOARD)/bootloader_defs.h
-    else ifneq ("$(wildcard $(KEYBOARD_PATH_3)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_3)/bootloader_defs.h
-     else ifneq ("$(wildcard $(KEYBOARD_PATH_3)/boards/$(BOARD)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_3)/boards/$(BOARD)/bootloader_defs.h
-    else ifneq ("$(wildcard $(KEYBOARD_PATH_2)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_2)/bootloader_defs.h
-     else ifneq ("$(wildcard $(KEYBOARD_PATH_2)/boards/$(BOARD)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_2)/boards/$(BOARD)/bootloader_defs.h
-    else ifneq ("$(wildcard $(KEYBOARD_PATH_1)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_1)/bootloader_defs.h
-     else ifneq ("$(wildcard $(KEYBOARD_PATH_1)/boards/$(BOARD)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(KEYBOARD_PATH_1)/boards/$(BOARD)/bootloader_defs.h
-    else ifneq ("$(wildcard $(TOP_DIR)/drivers/boards/$(BOARD)/bootloader_defs.h)","")
-        OPT_DEFS += -include $(TOP_DIR)/drivers/boards/$(BOARD)/bootloader_defs.h
-    endif
-endif
-
 # Find all of the config.h files and add them to our CONFIG_H define.
 CONFIG_H :=
 ifneq ("$(wildcard $(KEYBOARD_PATH_5)/config.h)","")
@@ -307,11 +279,6 @@ ifneq ("$(wildcard $(KEYBOARD_PATH_5)/post_config.h)","")
     POST_CONFIG_H += $(KEYBOARD_PATH_5)/post_config.h
 endif
 
-# Save the defines and includes here, so we don't include any keymap specific ones
-PROJECT_DEFS := $(OPT_DEFS)
-PROJECT_INC := $(VPATH) $(EXTRAINCDIRS) $(KEYBOARD_PATHS)
-PROJECT_CONFIG := $(CONFIG_H)
-
 # Userspace setup and definitions
 ifeq ("$(USER_NAME)","")
     USER_NAME := $(KEYMAP)
@@ -357,23 +324,17 @@ SRC += $(TMK_COMMON_SRC)
 OPT_DEFS += $(TMK_COMMON_DEFS)
 EXTRALDFLAGS += $(TMK_COMMON_LDFLAGS)
 
-ifeq ($(PLATFORM),AVR)
-ifeq ($(strip $(PROTOCOL)), VUSB)
-    include $(TMK_PATH)/protocol/vusb.mk
+include $(TMK_PATH)/$(PLATFORM_KEY).mk
+ifneq ($(strip $(PROTOCOL)),)
+    include $(TMK_PATH)/protocol/$(strip $(shell echo $(PROTOCOL) | tr '[:upper:]' '[:lower:]')).mk
 else
-    include $(TMK_PATH)/protocol/lufa.mk
-endif
-    include $(TMK_PATH)/avr.mk
+    include $(TMK_PATH)/protocol/$(PLATFORM_KEY).mk
 endif
 
-ifeq ($(PLATFORM),ARM_ATSAM)
-    include $(TMK_PATH)/arm_atsam.mk
-    include $(TMK_PATH)/protocol/arm_atsam.mk
-endif
-
-ifeq ($(PLATFORM),CHIBIOS)
-    include $(TMK_PATH)/protocol/chibios.mk
-endif
+# TODO: remove this bodge?
+PROJECT_DEFS := $(OPT_DEFS)
+PROJECT_INC := $(VPATH) $(EXTRAINCDIRS) $(KEYBOARD_PATHS)
+PROJECT_CONFIG := $(CONFIG_H)
 
 ifeq ($(strip $(VISUALIZER_ENABLE)), yes)
     VISUALIZER_DIR = $(QUANTUM_DIR)/visualizer
diff --git a/quantum/mcu_selection.mk b/quantum/mcu_selection.mk
index f15a4f58c..ef7e8ae75 100644
--- a/quantum/mcu_selection.mk
+++ b/quantum/mcu_selection.mk
@@ -213,6 +213,8 @@ ifneq ($(findstring STM32F103, $(MCU)),)
 endif
 
 ifneq (,$(filter $(MCU),atmega16u2 atmega32u2 atmega16u4 atmega32u4 at90usb646 at90usb1286))
+  PROTOCOL = LUFA
+
   # Processor frequency.
   #     This will define a symbol, F_CPU, in all source code files equal to the
   #     processor frequency in Hz. You can then use this symbol in your source code to
diff --git a/tmk_core/chibios.mk b/tmk_core/chibios.mk
index b400e9e0f..f3b4b399c 100644
--- a/tmk_core/chibios.mk
+++ b/tmk_core/chibios.mk
@@ -24,6 +24,7 @@ endif
 #
 
 # Imported source files and paths
+OPT_OS = chibios
 CHIBIOS = $(TOP_DIR)/lib/chibios
 CHIBIOS_CONTRIB = $(TOP_DIR)/lib/chibios-contrib
 # Startup files. Try a few different locations, for compability with old versions and
@@ -49,6 +50,34 @@ PLATFORM_MK = $(CHIBIOS_CONTRIB)/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)/$(PLAT
 endif
 include $(PLATFORM_MK)
 
+# Bootloader address
+ifdef STM32_BOOTLOADER_ADDRESS
+    OPT_DEFS += -DSTM32_BOOTLOADER_ADDRESS=$(STM32_BOOTLOADER_ADDRESS)
+endif
+
+ifneq ("$(wildcard $(KEYBOARD_PATH_5)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_5)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_5)/boards/$(BOARD)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_5)/boards/$(BOARD)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_4)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_4)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_4)/boards/$(BOARD)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_4)/boards/$(BOARD)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_3)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_3)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_3)/boards/$(BOARD)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_3)/boards/$(BOARD)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_2)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_2)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_2)/boards/$(BOARD)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_2)/boards/$(BOARD)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_1)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_1)/bootloader_defs.h
+else ifneq ("$(wildcard $(KEYBOARD_PATH_1)/boards/$(BOARD)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(KEYBOARD_PATH_1)/boards/$(BOARD)/bootloader_defs.h
+else ifneq ("$(wildcard $(TOP_DIR)/drivers/boards/$(BOARD)/bootloader_defs.h)","")
+    OPT_DEFS += -include $(TOP_DIR)/drivers/boards/$(BOARD)/bootloader_defs.h
+endif
 
 BOARD_MK :=
 
diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index 3cc72a845..4d4272d26 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -166,11 +166,6 @@ ifeq ($(strip $(LINK_TIME_OPTIMIZATION_ENABLE)), yes)
     TMK_COMMON_DEFS += -DNO_ACTION_FUNCTION
 endif
 
-# Bootloader address
-ifdef STM32_BOOTLOADER_ADDRESS
-    TMK_COMMON_DEFS += -DSTM32_BOOTLOADER_ADDRESS=$(STM32_BOOTLOADER_ADDRESS)
-endif
-
 # Search Path
 VPATH += $(TMK_PATH)/$(COMMON_DIR)
 VPATH += $(TMK_PATH)/$(PLATFORM_COMMON_DIR)