MII_MDO
CSR_WRITE(l, SPR_CSR9, MII_MDO);
CSR_WRITE(l, SPR_CSR9, MII_MDO | MII_MDC);
CSR_WRITE(l, SPR_CSR9, MII_MDO);
v |= MII_MDO;
v &= ~MII_MDO;
CSR_WRITE(l, SPR_CSR9, MII_MDO);
CSR_WRITE(l, SPR_CSR9, MII_MDO | MII_MDC);
CSR_WRITE(l, SPR_CSR9, MII_MDO);
v |= MII_MDO;
v &= ~MII_MDO;