MAX_BYTES_PER_FRAME
[FHCI_TF_CTRL] = MAX_BYTES_PER_FRAME,
[FHCI_TF_ISO] = (MAX_BYTES_PER_FRAME *
[FHCI_TF_BULK] = MAX_BYTES_PER_FRAME,
[FHCI_TF_INTR] = (MAX_BYTES_PER_FRAME *
(MAX_BYTES_PER_FRAME >> 3) - 7;
usb->max_bytes_per_frame = (MAX_BYTES_PER_FRAME - 15);