USBCTRL_READ4
stat = USBCTRL_READ4(sc, USBCTRL_STAT);
stat = USBCTRL_READ4(ssc, USBCTRL_STAT);
stat0 = USBCTRL_READ4(ssc, USBCTRL_IRQ_STAT0);
stat1 = USBCTRL_READ4(ssc, USBCTRL_IRQ_STAT1);
reg = USBCTRL_READ4(sc, USBCTRL_MODE);
reg = USBCTRL_READ4(sc, USBCTRL_MODE);