STE_PHYCTL
#define MII_SET(x) STE_SETBIT1(sc, STE_PHYCTL, x)
#define MII_CLR(x) STE_CLRBIT1(sc, STE_PHYCTL, x)
CSR_WRITE_2(sc, STE_PHYCTL, 0);
ack = CSR_READ_2(sc, STE_PHYCTL) & STE_PHYCTL_MDATA;
if (CSR_READ_2(sc, STE_PHYCTL) & STE_PHYCTL_MDATA)