diff options
| -rw-r--r-- | drivers/dma/ti-dma-crossbar.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/dma/ti-dma-crossbar.c b/drivers/dma/ti-dma-crossbar.c index 1fd3fb73d6e8..10487d91e60d 100644 --- a/drivers/dma/ti-dma-crossbar.c +++ b/drivers/dma/ti-dma-crossbar.c @@ -20,6 +20,9 @@ #define TI_XBAR_OUTPUTS 127 #define TI_XBAR_INPUTS 256 +#define TI_XBAR_EDMA_OFFSET 0 +#define TI_XBAR_SDMA_OFFSET 1 + struct ti_dma_xbar_data { void __iomem *iomem; @@ -29,6 +32,7 @@ struct ti_dma_xbar_data { u16 safe_val; /* Value to rest the crossbar lines */ u32 xbar_requests; /* number of DMA requests connected to XBAR */ u32 dma_requests; /* number of DMA requests forwarded to DMA */ + u32 dma_offset; }; struct ti_dma_xbar_map { @@ -84,8 +88,7 @@ static void *ti_dma_xbar_route_allocate(struct of_phandle_args *dma_spec, GFP_KERNEL); map->xbar_in = (u16)dma_spec->args[0]; - /* The DMA request is 1 based in sDMA */ - dma_spec->args[0] = map->xbar_out + 1; + dma_spec->args[0] = map->xbar_out + xbar->dma_offset; dev_dbg(&pdev->dev, "Mapping XBAR%u to DMA%d\n", map->xbar_in, map->xbar_out); @@ -95,9 +98,22 @@ static void *ti_dma_xbar_route_allocate(struct of_phandle_args *dma_spec, return map; } +static const struct of_device_id ti_dma_master_match[] = { + { + .compatible = "ti,omap4430-sdma", + .data = (void *)TI_XBAR_SDMA_OFFSET, + }, + { + .compatible = "ti,edma3", + .data = (void *)TI_XBAR_EDMA_OFFSET, + }, + {}, +}; + static int ti_dma_xbar_probe(struct platform_device *pdev) { struct device_node *node = pdev->dev.of_node; + const struct of_device_id *match; struct device_node *dma_node; struct ti_dma_xbar_data *xbar; struct resource *res; @@ -120,6 +136,12 @@ static int ti_dma_xbar_probe(struct platform_device *pdev) return -ENODEV; } + match = of_match_node(ti_dma_master_match, dma_node); + if (!match) { + dev_err(&pdev->dev, "DMA master is not supported\n"); + return -EINVAL; + } + if (of_property_read_u32(dma_node, "dma-requests", &xbar->dma_requests)) { dev_info(&pdev->dev, @@ -151,6 +173,7 @@ static int ti_dma_xbar_probe(struct platform_device *pdev) xbar->dmarouter.dev = &pdev->dev; xbar->dmarouter.route_free = ti_dma_xbar_free; + xbar->dma_offset = (u32)match->data; platform_set_drvdata(pdev, xbar); |