dmaengine: dw: provide DMA capabilities
The new DMAEngine requirement is to provide what the DMA controller can do,
such as directions, bus widths, and residue granularity. The patch sets those
properties for the DesignWare DMA controller driver.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index 4bc3077..fcb9a91 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -61,6 +61,13 @@
*/
#define NR_DESCS_PER_CHANNEL 64
+/* The set of bus widths supported by the DMA controller */
+#define DW_DMA_BUSWIDTHS \
+ BIT(DMA_SLAVE_BUSWIDTH_UNDEFINED) | \
+ BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)
+
/*----------------------------------------------------------------------*/
static struct device *chan2dev(struct dma_chan *chan)
@@ -1660,8 +1667,8 @@
dw->dma.device_free_chan_resources = dwc_free_chan_resources;
dw->dma.device_prep_dma_memcpy = dwc_prep_dma_memcpy;
-
dw->dma.device_prep_slave_sg = dwc_prep_slave_sg;
+
dw->dma.device_config = dwc_config;
dw->dma.device_pause = dwc_pause;
dw->dma.device_resume = dwc_resume;
@@ -1670,6 +1677,13 @@
dw->dma.device_tx_status = dwc_tx_status;
dw->dma.device_issue_pending = dwc_issue_pending;
+ /* DMA capabilities */
+ dw->dma.src_addr_widths = DW_DMA_BUSWIDTHS;
+ dw->dma.dst_addr_widths = DW_DMA_BUSWIDTHS;
+ dw->dma.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV) |
+ BIT(DMA_MEM_TO_MEM);
+ dw->dma.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+
err = dma_async_device_register(&dw->dma);
if (err)
goto err_dma_register;