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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>
This commit is contained in:
Maxime Ripard 2014-11-17 14:42:21 +01:00 committed by Vinod Koul
parent db08425ebd
commit a0abd6719b
1 changed files with 56 additions and 53 deletions
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109
drivers/dma/mmp_pdma.c
View File

@ -683,68 +683,70 @@ mmp_pdma_prep_dma_cyclic(struct dma_chan *dchan,
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)