Merge branch 'topic/dma_control_fsl_acks' into for-linus

drivers/dma/fsldma.c

@@ -36,7 +36,7 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
-
+#include <linux/fsldma.h>
 #include "dmaengine.h"
 #include "fsldma.h"
 
@@ -367,6 +367,20 @@ static void fsl_chan_toggle_ext_start(struct fsldma_chan *chan, int enable)
 		chan->feature &= ~FSL_DMA_CHAN_START_EXT;
 }
 
+int fsl_dma_external_start(struct dma_chan *dchan, int enable)
+{
+	struct fsldma_chan *chan;
+
+	if (!dchan)
+		return -EINVAL;
+
+	chan = to_fsl_chan(dchan);
+
+	fsl_chan_toggle_ext_start(chan, enable);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(fsl_dma_external_start);
+
 static void append_ld_queue(struct fsldma_chan *chan, struct fsl_desc_sw *desc)
 {
 	struct fsl_desc_sw *tail = to_fsl_desc(chan->ld_pending.prev);
@@ -998,15 +1012,6 @@ static int fsl_dma_device_control(struct dma_chan *dchan,
 		chan->set_request_count(chan, size);
 		return 0;
 
-	case FSLDMA_EXTERNAL_START:
-
-		/* make sure the channel supports external start */
-		if (!chan->toggle_ext_start)
-			return -ENXIO;
-
-		chan->toggle_ext_start(chan, arg);
-		return 0;
-
 	default:
 		return -ENXIO;
 	}

drivers/misc/carma/carma-fpga-program.c

@@ -16,6 +16,7 @@
 #include <linux/completion.h>
 #include <linux/miscdevice.h>
 #include <linux/dmaengine.h>
+#include <linux/fsldma.h>
 #include <linux/interrupt.h>
 #include <linux/highmem.h>
 #include <linux/kernel.h>
@@ -518,23 +519,22 @@ static noinline int fpga_program_dma(struct fpga_dev *priv)
 	config.direction = DMA_MEM_TO_DEV;
 	config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 	config.dst_maxburst = fpga_fifo_size(priv->regs) / 2 / 4;
-	ret = chan->device->device_control(chan, DMA_SLAVE_CONFIG,
-					   (unsigned long)&config);
+	ret = dmaengine_slave_config(chan, &config);
 	if (ret) {
 		dev_err(priv->dev, "DMA slave configuration failed\n");
 		goto out_dma_unmap;
 	}
 
-	ret = chan->device->device_control(chan, FSLDMA_EXTERNAL_START, 1);
+	ret = fsl_dma_external_start(chan, 1)
 	if (ret) {
 		dev_err(priv->dev, "DMA external control setup failed\n");
 		goto out_dma_unmap;
 	}
 
 	/* setup and submit the DMA transaction */
-	tx = chan->device->device_prep_dma_sg(chan,
-					      table.sgl, num_pages,
-					      vb->sglist, vb->sglen, 0);
+
+	tx = dmaengine_prep_dma_sg(chan, table.sgl, num_pages,
+			vb->sglist, vb->sglen, 0);
 	if (!tx) {
 		dev_err(priv->dev, "Unable to prep DMA transaction\n");
 		ret = -ENOMEM;

include/linux/dmaengine.h

@@ -199,15 +199,12 @@ enum dma_ctrl_flags {
  * configuration data in statically from the platform). An additional
  * argument of struct dma_slave_config must be passed in with this
  * command.
- * @FSLDMA_EXTERNAL_START: this command will put the Freescale DMA controller
- * into external start mode.
  */
 enum dma_ctrl_cmd {
 	DMA_TERMINATE_ALL,
 	DMA_PAUSE,
 	DMA_RESUME,
 	DMA_SLAVE_CONFIG,
-	FSLDMA_EXTERNAL_START,
 };
 
 /**
@@ -757,6 +754,16 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_interleaved_dma(
 	return chan->device->device_prep_interleaved_dma(chan, xt, flags);
 }
 
+static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_sg(
+		struct dma_chan *chan,
+		struct scatterlist *dst_sg, unsigned int dst_nents,
+		struct scatterlist *src_sg, unsigned int src_nents,
+		unsigned long flags)
+{
+	return chan->device->device_prep_dma_sg(chan, dst_sg, dst_nents,
+			src_sg, src_nents, flags);
+}
+
 static inline int dma_get_slave_caps(struct dma_chan *chan, struct dma_slave_caps *caps)
 {
 	if (!chan || !caps)

include/linux/fsldma.h

@@ -0,0 +1,13 @@
+/*
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef FSL_DMA_H
+#define FSL_DMA_H
+/* fsl dma API for enxternal start */
+int fsl_dma_external_start(struct dma_chan *dchan, int enable);
+
+#endif