_sc92031_mii_read
output_status = _sc92031_mii_read(port_base, MII_OutputStatus);
bmcr = _sc92031_mii_read(port_base, MII_BMCR);
bmsr = _sc92031_mii_read(port_base, MII_BMSR);
u16 output_status = _sc92031_mii_read(port_base,