MII_SREVISION
phy_reserved = mii_rw(dev, np->phyaddr, MII_SREVISION, MII_READ);
if (mii_rw(dev, np->phyaddr, MII_SREVISION, phy_reserved))
MII_REG_BITS_ON(TCSR_ECHODIS, MII_SREVISION,
MII_REG_BITS_OFF(TCSR_ECHODIS, MII_SREVISION,
MII_REG_BITS_ON(TCSR_ECHODIS, MII_SREVISION, vptr->mac_regs);
MII_REG_BITS_OFF(TCSR_ECHODIS, MII_SREVISION, vptr->mac_regs);
MII_REG_BITS_ON(TCSR_ECHODIS, MII_SREVISION, vptr->mac_regs);
MII_REG_BITS_OFF(TCSR_ECHODIS, MII_SREVISION, vptr->mac_regs);
case MII_SREVISION: /* silicon revision */