PHY_BMCR_RAN
control &= ~(PHY_BMCR_ANE | PHY_BMCR_RAN |
control |= (PHY_BMCR_ANE | PHY_BMCR_RAN);
control |= (PHY_BMCR_ANE | PHY_BMCR_RAN);
control &= ~(PHY_BMCR_FDX | PHY_BMCR_ANE | PHY_BMCR_RAN);