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authorMaxime Ripard <maxime.ripard@free-electrons.com>2014-11-17 14:42:21 +0100
committerVinod Koul <vinod.koul@intel.com>2014-12-22 12:29:00 +0530
commita0abd6719b73c995eac23aa8835a79f67681e872 (patch)
tree73d9c6e7e6a9c0eab8244255fb8c96e4d7652b06 /drivers/dma
parentdb08425ebd51f3b4c73b0698ca3b0173ebd106be (diff)
dmaengine: mmp-pdma: Split device_control
Split the device_control callback of the Marvell MMP PDMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/mmp_pdma.c109
1 files changed, 56 insertions, 53 deletions
diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
index 8b8952f35e6c..8926f271904e 100644
--- a/drivers/dma/mmp_pdma.c
+++ b/drivers/dma/mmp_pdma.c
@@ -683,68 +683,70 @@ fail:
return NULL;
}
-static int mmp_pdma_control(struct dma_chan *dchan, enum dma_ctrl_cmd cmd,
- unsigned long arg)
+static int mmp_pdma_config(struct dma_chan *dchan,
+ struct dma_slave_config *cfg)
{
struct mmp_pdma_chan *chan = to_mmp_pdma_chan(dchan);
- struct dma_slave_config *cfg = (void *)arg;
- unsigned long flags;
u32 maxburst = 0, addr = 0;
enum dma_slave_buswidth width = DMA_SLAVE_BUSWIDTH_UNDEFINED;
if (!dchan)
return -EINVAL;
- switch (cmd) {
- case DMA_TERMINATE_ALL:
- disable_chan(chan->phy);
- mmp_pdma_free_phy(chan);
- spin_lock_irqsave(&chan->desc_lock, flags);
- mmp_pdma_free_desc_list(chan, &chan->chain_pending);
- mmp_pdma_free_desc_list(chan, &chan->chain_running);
- spin_unlock_irqrestore(&chan->desc_lock, flags);
- chan->idle = true;
- break;
- case DMA_SLAVE_CONFIG:
- if (cfg->direction == DMA_DEV_TO_MEM) {
- chan->dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC;
- maxburst = cfg->src_maxburst;
- width = cfg->src_addr_width;
- addr = cfg->src_addr;
- } else if (cfg->direction == DMA_MEM_TO_DEV) {
- chan->dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG;
- maxburst = cfg->dst_maxburst;
- width = cfg->dst_addr_width;
- addr = cfg->dst_addr;
- }
-
- if (width == DMA_SLAVE_BUSWIDTH_1_BYTE)
- chan->dcmd |= DCMD_WIDTH1;
- else if (width == DMA_SLAVE_BUSWIDTH_2_BYTES)
- chan->dcmd |= DCMD_WIDTH2;
- else if (width == DMA_SLAVE_BUSWIDTH_4_BYTES)
- chan->dcmd |= DCMD_WIDTH4;
-
- if (maxburst == 8)
- chan->dcmd |= DCMD_BURST8;
- else if (maxburst == 16)
- chan->dcmd |= DCMD_BURST16;
- else if (maxburst == 32)
- chan->dcmd |= DCMD_BURST32;
-
- chan->dir = cfg->direction;
- chan->dev_addr = addr;
- /* FIXME: drivers should be ported over to use the filter
- * function. Once that's done, the following two lines can
- * be removed.
- */
- if (cfg->slave_id)
- chan->drcmr = cfg->slave_id;
- break;
- default:
- return -ENOSYS;
+ if (cfg->direction == DMA_DEV_TO_MEM) {
+ chan->dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC;
+ maxburst = cfg->src_maxburst;
+ width = cfg->src_addr_width;
+ addr = cfg->src_addr;
+ } else if (cfg->direction == DMA_MEM_TO_DEV) {
+ chan->dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG;
+ maxburst = cfg->dst_maxburst;
+ width = cfg->dst_addr_width;
+ addr = cfg->dst_addr;
}
+ if (width == DMA_SLAVE_BUSWIDTH_1_BYTE)
+ chan->dcmd |= DCMD_WIDTH1;
+ else if (width == DMA_SLAVE_BUSWIDTH_2_BYTES)
+ chan->dcmd |= DCMD_WIDTH2;
+ else if (width == DMA_SLAVE_BUSWIDTH_4_BYTES)
+ chan->dcmd |= DCMD_WIDTH4;
+
+ if (maxburst == 8)
+ chan->dcmd |= DCMD_BURST8;
+ else if (maxburst == 16)
+ chan->dcmd |= DCMD_BURST16;
+ else if (maxburst == 32)
+ chan->dcmd |= DCMD_BURST32;
+
+ chan->dir = cfg->direction;
+ chan->dev_addr = addr;
+ /* FIXME: drivers should be ported over to use the filter
+ * function. Once that's done, the following two lines can
+ * be removed.
+ */
+ if (cfg->slave_id)
+ chan->drcmr = cfg->slave_id;
+
+ return 0;
+}
+
+static int mmp_pdma_terminate_all(struct dma_chan *dchan)
+{
+ struct mmp_pdma_chan *chan = to_mmp_pdma_chan(dchan);
+ unsigned long flags;
+
+ if (!dchan)
+ return -EINVAL;
+
+ disable_chan(chan->phy);
+ mmp_pdma_free_phy(chan);
+ spin_lock_irqsave(&chan->desc_lock, flags);
+ mmp_pdma_free_desc_list(chan, &chan->chain_pending);
+ mmp_pdma_free_desc_list(chan, &chan->chain_running);
+ spin_unlock_irqrestore(&chan->desc_lock, flags);
+ chan->idle = true;
+
return 0;
}
@@ -1061,7 +1063,8 @@ static int mmp_pdma_probe(struct platform_device *op)
pdev->device.device_prep_slave_sg = mmp_pdma_prep_slave_sg;
pdev->device.device_prep_dma_cyclic = mmp_pdma_prep_dma_cyclic;
pdev->device.device_issue_pending = mmp_pdma_issue_pending;
- pdev->device.device_control = mmp_pdma_control;
+ pdev->device.device_config = mmp_pdma_config;
+ pdev->device.device_terminate_all = mmp_pdma_terminate_all;
pdev->device.copy_align = PDMA_ALIGNMENT;
if (pdev->dev->coherent_dma_mask)