GENET_MDIO_CMD
WR4(sc, GENET_MDIO_CMD, GENET_MDIO_READ |
val = RD4(sc, GENET_MDIO_CMD);
WR4(sc, GENET_MDIO_CMD, val | GENET_MDIO_START_BUSY);
if (((val = RD4(sc, GENET_MDIO_CMD)) &
WR4(sc, GENET_MDIO_CMD, GENET_MDIO_WRITE |
val = RD4(sc, GENET_MDIO_CMD);
WR4(sc, GENET_MDIO_CMD, val | GENET_MDIO_START_BUSY);
val = RD4(sc, GENET_MDIO_CMD);