MCIR2_MOUSE_NBITS
data->wanted_bits = MCIR2_MOUSE_NBITS;
case MCIR2_MOUSE_NBITS:
((u64)MCIR2_MOUSE_HEADER << MCIR2_MOUSE_NBITS);
len = MCIR2_MOUSE_NBITS + MCIR2_HEADER_NBITS;