NS_PHY_DSPCFG
CSR_WRITE_4(sc, NS_PHY_DSPCFG, 0x5040);
reg = CSR_READ_4(sc, NS_PHY_DSPCFG) & 0xfff;
CSR_WRITE_4(sc, NS_PHY_DSPCFG, reg | 0x1000);
SIS_SETBIT(sc, NS_PHY_DSPCFG, 0x20);