diff options
Diffstat (limited to 'drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c')
| -rw-r--r-- | drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c | 57 |
1 files changed, 52 insertions, 5 deletions
diff --git a/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c b/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c index f36dc6258900..eff34ded6305 100644 --- a/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c +++ b/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c @@ -11,6 +11,7 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> @@ -28,6 +29,12 @@ #include "sun4i_csi.h" +struct sun4i_csi_traits { + unsigned int channels; + unsigned int max_width; + bool has_isp; +}; + static const struct media_entity_operations sun4i_csi_video_entity_ops = { .link_validate = v4l2_subdev_link_validate, }; @@ -155,6 +162,31 @@ static int sun4i_csi_probe(struct platform_device *pdev) subdev = &csi->subdev; vdev = &csi->vdev; + csi->traits = of_device_get_match_data(&pdev->dev); + if (!csi->traits) + return -EINVAL; + + /* + * On Allwinner SoCs, some high memory bandwidth devices do DMA + * directly over the memory bus (called MBUS), instead of the + * system bus. The memory bus has a different addressing scheme + * without the DRAM starting offset. + * + * In some cases this can be described by an interconnect in + * the device tree. In other cases where the hardware is not + * fully understood and the interconnect is left out of the + * device tree, fall back to a default offset. + */ + if (of_find_property(csi->dev->of_node, "interconnects", NULL)) { + ret = of_dma_configure(csi->dev, csi->dev->of_node, true); + if (ret) + return ret; + } else { +#ifdef PHYS_PFN_OFFSET + csi->dev->dma_pfn_offset = PHYS_PFN_OFFSET; +#endif + } + csi->mdev.dev = csi->dev; strscpy(csi->mdev.model, "Allwinner Video Capture Device", sizeof(csi->mdev.model)); @@ -177,10 +209,12 @@ static int sun4i_csi_probe(struct platform_device *pdev) return PTR_ERR(csi->bus_clk); } - csi->isp_clk = devm_clk_get(&pdev->dev, "isp"); - if (IS_ERR(csi->isp_clk)) { - dev_err(&pdev->dev, "Couldn't get our ISP clock\n"); - return PTR_ERR(csi->isp_clk); + if (csi->traits->has_isp) { + csi->isp_clk = devm_clk_get(&pdev->dev, "isp"); + if (IS_ERR(csi->isp_clk)) { + dev_err(&pdev->dev, "Couldn't get our ISP clock\n"); + return PTR_ERR(csi->isp_clk); + } } csi->ram_clk = devm_clk_get(&pdev->dev, "ram"); @@ -258,8 +292,21 @@ static int sun4i_csi_remove(struct platform_device *pdev) return 0; } +static const struct sun4i_csi_traits sun4i_a10_csi1_traits = { + .channels = 1, + .max_width = 24, + .has_isp = false, +}; + +static const struct sun4i_csi_traits sun7i_a20_csi0_traits = { + .channels = 4, + .max_width = 16, + .has_isp = true, +}; + static const struct of_device_id sun4i_csi_of_match[] = { - { .compatible = "allwinner,sun7i-a20-csi0" }, + { .compatible = "allwinner,sun4i-a10-csi1", .data = &sun4i_a10_csi1_traits }, + { .compatible = "allwinner,sun7i-a20-csi0", .data = &sun7i_a20_csi0_traits }, { /* Sentinel */ } }; MODULE_DEVICE_TABLE(of, sun4i_csi_of_match); |