UTMI_TX
u2o_clear(base, UTMI_TX, UTMI_TX_REG_EXT_FS_RCAL_EN_MASK
u2o_set(base, UTMI_TX, 3<<UTMI_TX_TXVDD12_SHIFT
u2o_set(base, UTMI_TX, REG_RCAL_START);
u2o_clear(base, UTMI_TX, REG_RCAL_START);