diff options
| -rw-r--r-- | drivers/dma/imx-dma.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c index b51391adb28..9a179787316 100644 --- a/drivers/dma/imx-dma.c +++ b/drivers/dma/imx-dma.c @@ -195,7 +195,8 @@ static int imxdma_alloc_chan_resources(struct dma_chan *chan) struct imxdma_channel *imxdmac = to_imxdma_chan(chan); struct imx_dma_data *data = chan->private; - imxdmac->dma_request = data->dma_request; + if (data != NULL) + imxdmac->dma_request = data->dma_request; dma_async_tx_descriptor_init(&imxdmac->desc, chan); imxdmac->desc.tx_submit = imxdma_tx_submit; @@ -327,6 +328,36 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic( return &imxdmac->desc; } +static struct dma_async_tx_descriptor *imxdma_prep_dma_memcpy( + struct dma_chan *chan, dma_addr_t dest, + dma_addr_t src, size_t len, unsigned long flags) +{ + struct imxdma_channel *imxdmac = to_imxdma_chan(chan); + struct imxdma_engine *imxdma = imxdmac->imxdma; + int ret; + + dev_dbg(imxdma->dev, "%s channel: %d src=0x%x dst=0x%x len=%d\n", + __func__, imxdmac->channel, src, dest, len); + + if (imxdmac->status == DMA_IN_PROGRESS) + return NULL; + imxdmac->status = DMA_IN_PROGRESS; + + ret = imx_dma_config_channel(imxdmac->imxdma_channel, + IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, + IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, + 0, 0); + if (ret) + return NULL; + + ret = imx_dma_setup_single(imxdmac->imxdma_channel, src, len, + dest, DMA_MODE_WRITE); + if (ret) + return NULL; + + return &imxdmac->desc; +} + static void imxdma_issue_pending(struct dma_chan *chan) { struct imxdma_channel *imxdmac = to_imxdma_chan(chan); @@ -348,6 +379,7 @@ static int __init imxdma_probe(struct platform_device *pdev) dma_cap_set(DMA_SLAVE, imxdma->dma_device.cap_mask); dma_cap_set(DMA_CYCLIC, imxdma->dma_device.cap_mask); + dma_cap_set(DMA_MEMCPY, imxdma->dma_device.cap_mask); /* Initialize channel parameters */ for (i = 0; i < MAX_DMA_CHANNELS; i++) { @@ -381,11 +413,13 @@ static int __init imxdma_probe(struct platform_device *pdev) imxdma->dma_device.device_tx_status = imxdma_tx_status; imxdma->dma_device.device_prep_slave_sg = imxdma_prep_slave_sg; imxdma->dma_device.device_prep_dma_cyclic = imxdma_prep_dma_cyclic; + imxdma->dma_device.device_prep_dma_memcpy = imxdma_prep_dma_memcpy; imxdma->dma_device.device_control = imxdma_control; imxdma->dma_device.device_issue_pending = imxdma_issue_pending; platform_set_drvdata(pdev, imxdma); + imxdma->dma_device.copy_align = 2; /* 2^2 = 4 bytes alignment */ imxdma->dma_device.dev->dma_parms = &imxdma->dma_parms; dma_set_max_seg_size(imxdma->dma_device.dev, 0xffffff); |