USBHC_HR_MASK
HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) | USBHC_HR_FHR);
HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) & ~(USBHC_HR_FHR));
HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) | USBHC_HR_FSBIR);
HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) & ~(USBHC_HR_SSE));
HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) &
HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) | USBHC_HR_FHR);
HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) & ~(USBHC_HR_FHR));