dma: pl330: Implement device_slave_caps

[karo-tx-linux.git] / drivers / dma / pl330.c

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 593827b3fdd4fd8556724da998934a7c191b8d49..7c02e83c7308768f8846f1593e2404c7551186c2 100644 (file)
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2855,6 +2855,32 @@ static irqreturn_t pl330_irq_handler(int irq, void *data)
                return IRQ_NONE;
 }
 
+#define PL330_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) | \
+       BIT(DMA_SLAVE_BUSWIDTH_8_BYTES)
+
+static int pl330_dma_device_slave_caps(struct dma_chan *dchan,
+       struct dma_slave_caps *caps)
+{
+       caps->src_addr_widths = PL330_DMA_BUSWIDTHS;
+       caps->dstn_addr_widths = PL330_DMA_BUSWIDTHS;
+       caps->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+       caps->cmd_pause = false;
+       caps->cmd_terminate = true;
+
+       /*
+        * This is the limit for transfers with a buswidth of 1, larger
+        * buswidths will have larger limits.
+        */
+       caps->max_sg_len = 1900800;
+       caps->max_sg_nr = 0;
+
+       return 0;
+}
+
 static int
 pl330_probe(struct amba_device *adev, const struct amba_id *id)
 {
@@ -2959,6 +2985,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
        pd->device_prep_slave_sg = pl330_prep_slave_sg;
        pd->device_control = pl330_control;
        pd->device_issue_pending = pl330_issue_pending;
+       pd->device_slave_caps = pl330_dma_device_slave_caps;
 
        ret = dma_async_device_register(pd);
        if (ret) {