EDMA_CMD
writelfl(EDMA_EN, port_mmio + EDMA_CMD);
writelfl(EDMA_DS, port_mmio + EDMA_CMD);
u32 reg = readl(port_mmio + EDMA_CMD);
writelfl(EDMA_RESET, port_mmio + EDMA_CMD);
writelfl(EDMA_RESET, port_mmio + EDMA_CMD);
writelfl(0, port_mmio + EDMA_CMD);