MACCFG1_RX_EN
etsec_write(sc, MACCFG1, sc->sc_maccfg1 | MACCFG1_TX_EN|MACCFG1_RX_EN);
etsec_write(sc, MACCFG1, sc->sc_maccfg1 | MACCFG1_TX_EN|MACCFG1_RX_EN);
if (etsec_read(sc, MACCFG1) & (MACCFG1_TX_EN | MACCFG1_RX_EN)) {
sc->sc_maccfg1 &= ~(MACCFG1_TX_EN | MACCFG1_RX_EN);