MIO_EMM_DMA_FIFO_CFG
writeq(BIT_ULL(16), host->base + MIO_EMM_DMA_FIFO_CFG(host));
fifo_cfg = readq(host->dma_base + MIO_EMM_DMA_FIFO_CFG(host));
writeq(BIT_ULL(16), host->dma_base + MIO_EMM_DMA_FIFO_CFG(host));
writeq(0, host->dma_base + MIO_EMM_DMA_FIFO_CFG(host));
writeq(BIT_ULL(16), host->dma_base + MIO_EMM_DMA_FIFO_CFG(host));