MTW_USB_DMA_CFG
return (mtw_write(sc, MTW_USB_DMA_CFG, val));
mtw_write(sc, MTW_USB_DMA_CFG, tmp);
mtw_write(sc, MTW_USB_DMA_CFG, 0);
mtw_write(sc, MTW_USB_DMA_CFG,
mtw_read(sc, MTW_USB_DMA_CFG, &tmp);
mtw_write(sc, MTW_USB_DMA_CFG, tmp);