VT8500_URFIDX
while (vt8500_read(port, VT8500_URFIDX) & 0x1f00) {
unsigned int idx = vt8500_read(port, VT8500_URFIDX) & 0x1f;
status = vt8500_read(port, VT8500_URFIDX);
unsigned int status = vt8500_read(port, VT8500_URFIDX);
status = vt8500_read(port, VT8500_URFIDX);