DREQE
r8a66597_bclr(r8a66597, DREQE, ep->fifosel);
r8a66597_bset(r8a66597, DREQE, ep->fifosel);
r8a66597_bclr(r8a66597, DREQE, ep->fifosel);
#define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
usbhs_bset(priv, fifo->sel, DREQE, dreqe);