atmegadci_device_done
atmegadci_device_done(xfer, err);
static void atmegadci_device_done(struct usb_xfer *, usb_error_t);
atmegadci_device_done(xfer, USB_ERR_STALLED);
atmegadci_device_done(xfer, USB_ERR_CANCELLED);
atmegadci_device_done(xfer, USB_ERR_CANCELLED);
atmegadci_device_done(xfer, USB_ERR_TIMEOUT);