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authorVinod Koul <vinod.koul@intel.com>2013-09-02 12:10:40 (GMT)
committerVinod Koul <vinod.koul@intel.com>2013-09-02 12:10:40 (GMT)
commit355cdafe14d72c616dc804a756f3af4f4df4fe8c (patch)
tree592ef60b65da9a539daa84f5d1cf52cf483b362b /drivers/dma
parent4770ee44359ad454992d544cf14f8d330a93f5ca (diff)
parentca38ff133eb85b64e62b508a7726ea0247edd359 (diff)
downloadlinux-355cdafe14d72c616dc804a756f3af4f4df4fe8c.tar.xz
Merge branch 'topic/api_caps' into for-linus
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/pl330.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index cfd2d70..36ed301 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2870,6 +2870,32 @@ 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)
{
@@ -2975,6 +3001,7 @@ 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) {