MU3D_EP_TXCR1
mtu3_writel(mbase, MU3D_EP_TXCR1(epnum), csr1);
mtu3_readl(mbase, MU3D_EP_TXCR1(epnum)),
mtu3_writel(mbase, MU3D_EP_TXCR1(epnum), 0);
regs[1].offset = in ? MU3D_EP_TXCR1(epnum) : MU3D_EP_RXCR1(epnum);