drivers: sam dma xdmac: implemented dma device get_status() (bc695c6d) · Commits · Wenxi XU / zephyr

drivers/dma/dma_sam_xdmac.c

+25 −0

Changes for drivers/dma/dma_sam_xdmac.c: 25 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -375,11 +375,36 @@ static int sam_xdmac_initialize(const struct device *dev)
		return 0;
		}

		static int sam_xdmac_get_status(const struct device *dev, uint32_t channel,
		struct dma_status *status)
		{
		const struct sam_xdmac_dev_cfg *const dev_cfg = dev->config;

		Xdmac * const xdmac = dev_cfg->regs;
		uint32_t chan_cfg = xdmac->XDMAC_CHID[channel].XDMAC_CC;
		uint32_t ublen = xdmac->XDMAC_CHID[channel].XDMAC_CUBC;

		/* we need to check some of the XDMAC_CC registers to determine the DMA direction */
		if ((chan_cfg & XDMAC_CC_TYPE_Msk) == 0) {
		status->dir = MEMORY_TO_MEMORY;
		} else if ((chan_cfg & XDMAC_CC_DSYNC_Msk) == XDMAC_CC_DSYNC_MEM2PER) {
		status->dir = MEMORY_TO_PERIPHERAL;
		} else {
		status->dir = PERIPHERAL_TO_MEMORY;
		}

		status->busy = ((chan_cfg & XDMAC_CC_INITD_Msk) != 0) \|\| (ublen > 0);
		status->pending_length = ublen;

		return 0;
		}

		static const struct dma_driver_api sam_xdmac_driver_api = {
		.config = sam_xdmac_config,
		.reload = sam_xdmac_transfer_reload,
		.start = sam_xdmac_transfer_start,
		.stop = sam_xdmac_transfer_stop,
		.get_status = sam_xdmac_get_status,
		};

		/* DMA0 */