NIG_REG_XGXS0_CTRL_MD_DEVAD
REG_WR(bp, NIG_REG_XGXS0_CTRL_MD_DEVAD + params->port*0x18,
md_devad = REG_RD(bp, (NIG_REG_XGXS0_CTRL_MD_DEVAD +
REG_WR(bp, NIG_REG_XGXS0_CTRL_MD_DEVAD + port*0x18,
REG_WR(bp, NIG_REG_XGXS0_CTRL_MD_DEVAD + port*0x18,