STGE_AsicCtrl
ac = CSR_READ_4(sc, STGE_AsicCtrl);
CSR_WRITE_4(sc, STGE_AsicCtrl, ac);
if ((CSR_READ_4(sc, STGE_AsicCtrl) & AC_ResetBusy) == 0)
ac = CSR_READ_4(sc, STGE_AsicCtrl);
CSR_WRITE_4(sc, STGE_AsicCtrl, ac);
if ((CSR_READ_4(sc, STGE_AsicCtrl) & AC_ResetBusy) == 0)
ac = CSR_READ_4(sc, STGE_AsicCtrl);
CSR_WRITE_4(sc, STGE_AsicCtrl, ac);
if (CSR_READ_4(sc, STGE_AsicCtrl) & AC_PhyMedia)
CSR_WRITE_4(sc, STGE_AsicCtrl,
CSR_READ_4(sc, STGE_AsicCtrl) | AC_TxReset);