usba_readl
ctrl = usba_readl(udc, CTRL);
regval = usba_readl(udc, CTRL);
usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
status = usba_readl(udc, INT_STA) & (int_enb | USBA_HIGH_SPEED);
ctrl = usba_readl(udc, CTRL);
return USBA_BFEXT(FRAME_NUMBER, usba_readl(udc, FNUM));