rockbox/firmware/usbstack
..
usb_charging_only.c
usb_charging_only.h
usb_class_driver.h
usb_core.c
usb_hid.c
usb_hid.h
usb_hid_usage_tables.h
usb_serial.c
usb_serial.h
usb_storage.c
usb_storage.h