MII_DBG_MSE20DB
val = alc_miidbg_readreg(sc, MII_DBG_MSE20DB);
alc_miidbg_writereg(sc, MII_DBG_MSE20DB, val);
val = alc_miidbg_readreg(sc, MII_DBG_MSE20DB);
alc_miidbg_writereg(sc, MII_DBG_MSE20DB, val);