sun4i_usb_phy_write
sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);