MISC_REG_PORT4MODE_EN_OVWR
val = REG_RD(sc, MISC_REG_PORT4MODE_EN_OVWR);
if (REG_RD(sc, MISC_REG_PORT4MODE_EN_OVWR) == 0x3)
port4mode_ovwr_val = REG_RD(sc, MISC_REG_PORT4MODE_EN_OVWR);