DMA_INTR_ENA
u32 value = readl(ioaddr + DMA_INTR_ENA);
writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_INTR_ENA);
#define DMA_CHAN_INTR_ENA(chan) dma_chan_base_addr(DMA_INTR_ENA, chan)
u32 value = readl(ioaddr + DMA_INTR_ENA);