Move files that have no application-specific bits (e.g. USB stack, tuning, and RF path APIs) to ../common/.

firmware/hackrf_usb/Makefile

@@ -23,15 +23,15 @@
 BINARY = hackrf_usb
 
 SRC = $(BINARY).c \
-	rf_path.c \
+	../common/rf_path.c \
-	tuning.c \
+	../common/tuning.c \
 	sgpio_isr.c \
 	usb_bulk_buffer.c \
-	usb.c \
+	../common/usb.c \
-	usb_request.c \
+	../common/usb_request.c \
-	usb_standard_request.c \
+	../common/usb_standard_request.c \
 	usb_descriptor.c \
-	usb_queue.c \
+	../common/usb_queue.c \
 	../common/fault_handler.c \
 	../common/hackrf_core.c \
 	../common/sgpio.c \

firmware/hackrf_usb/Makefile_rom_to_ram

@@ -23,14 +23,15 @@
 BINARY = hackrf_usb_rom_to_ram
 
 SRC = hackrf_usb.c \
-	rf_path.c \
+	../common/rf_path.c \
-	tuning.c \
+	../common/tuning.c \
 	sgpio_isr.c \
 	usb_bulk_buffer.c \
-	usb.c \
+	../common/usb.c \
-	usb_request.c \
+	../common/usb_request.c \
-	usb_standard_request.c \
+	../common/usb_standard_request.c \
 	usb_descriptor.c \
+	../common/usb_queue.c \
 	../common/fault_handler.c \
 	../common/hackrf_core.c \
 	../common/sgpio.c \

firmware/hackrf_usb_rom_to_ram/Makefile

@@ -25,15 +25,15 @@ BINARY = hackrf_usb_rom_to_ram
 SRC_DIR = hackrf_usb
 
 SRC = hackrf_usb.c \
-	rf_path.c \
+	../common/rf_path.c \
-	tuning.c \
+	../common/tuning.c \
 	sgpio_isr.c \
 	usb_bulk_buffer.c \
-	usb.c \
+	../common/usb.c \
-	usb_request.c \
+	../common/usb_request.c \
-	usb_standard_request.c \
+	../common/usb_standard_request.c \
 	usb_descriptor.c \
-	usb_queue.c \
+	../common/usb_queue.c \
 	../common/fault_handler.c \
 	../common/hackrf_core.c \
 	../common/sgpio.c \