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path: root/drivers/dma/fsl-edma-common.c
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Diffstat (limited to 'drivers/dma/fsl-edma-common.c')
-rw-r--r--drivers/dma/fsl-edma-common.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index 5800747b8fb3..2b91863502d4 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -42,6 +42,32 @@
#define EDMA_TCD 0x1000
+void fsl_edma_tx_chan_handler(struct fsl_edma_chan *fsl_chan)
+{
+ spin_lock(&fsl_chan->vchan.lock);
+
+ if (!fsl_chan->edesc) {
+ /* terminate_all called before */
+ spin_unlock(&fsl_chan->vchan.lock);
+ return;
+ }
+
+ if (!fsl_chan->edesc->iscyclic) {
+ list_del(&fsl_chan->edesc->vdesc.node);
+ vchan_cookie_complete(&fsl_chan->edesc->vdesc);
+ fsl_chan->edesc = NULL;
+ fsl_chan->status = DMA_COMPLETE;
+ fsl_chan->idle = true;
+ } else {
+ vchan_cyclic_callback(&fsl_chan->edesc->vdesc);
+ }
+
+ if (!fsl_chan->edesc)
+ fsl_edma_xfer_desc(fsl_chan);
+
+ spin_unlock(&fsl_chan->vchan.lock);
+}
+
static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan)
{
struct edma_regs *regs = &fsl_chan->edma->regs;