mii_bitbang_ops_t
mii_bitbang_ops_t sc_bitbang_ops;
mii_bitbang_readreg(device_t sc, mii_bitbang_ops_t ops, int phy, int reg,
mii_bitbang_writereg(device_t sc, mii_bitbang_ops_t ops, int phy, int reg,
mii_bitbang_sync(device_t sc, mii_bitbang_ops_t ops)
mii_bitbang_sendbits(device_t sc, mii_bitbang_ops_t ops, uint32_t data,
int mii_bitbang_readreg(device_t, mii_bitbang_ops_t, int, int, uint16_t *);
int mii_bitbang_writereg(device_t, mii_bitbang_ops_t, int, int, uint16_t);