[media] s5p-mfc: Add device tree support

This patch will add the device tree support for MFC driver.

Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Acked-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index 3afe879..e2fe64e 100644 (file)
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -21,6 +21,7 @@
 #include <linux/videodev2.h>
 #include <media/v4l2-event.h>
 #include <linux/workqueue.h>
+#include <linux/of.h>
 #include <media/videobuf2-core.h>
 #include "s5p_mfc_common.h"
 #include "s5p_mfc_ctrl.h"
@@ -1027,6 +1028,8 @@ static int match_child(struct device *dev, void *data)
        return !strcmp(dev_name(dev), (char *)data);
 }
 
+static void *mfc_get_drv_data(struct platform_device *pdev);
+
 /* MFC probe function */
 static int s5p_mfc_probe(struct platform_device *pdev)
 {
@@ -1034,6 +1037,7 @@ static int s5p_mfc_probe(struct platform_device *pdev)
        struct video_device *vfd;
        struct resource *res;
        int ret;
+       unsigned int mem_info[2];
 
        pr_debug("%s++\n", __func__);
        dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
@@ -1050,8 +1054,7 @@ static int s5p_mfc_probe(struct platform_device *pdev)
                return -ENODEV;
        }
 
-       dev->variant = (struct s5p_mfc_variant *)
-               platform_get_device_id(pdev)->driver_data;
+       dev->variant = mfc_get_drv_data(pdev);
 
        ret = s5p_mfc_init_pm(dev);
        if (ret < 0) {
@@ -1081,20 +1084,55 @@ static int s5p_mfc_probe(struct platform_device *pdev)
                goto err_res;
        }
 
-       dev->mem_dev_l = device_find_child(&dev->plat_dev->dev, "s5p-mfc-l",
-                                          match_child);
-       if (!dev->mem_dev_l) {
-               mfc_err("Mem child (L) device get failed\n");
-               ret = -ENODEV;
-               goto err_res;
-       }
+       if (pdev->dev.of_node) {
+               dev->mem_dev_l = kzalloc(sizeof(struct device), GFP_KERNEL);
+               if (!dev->mem_dev_l) {
+                       mfc_err("Not enough memory\n");
+                       ret = -ENOMEM;
+                       goto err_res;
+               }
+               of_property_read_u32_array(pdev->dev.of_node, "samsung,mfc-l",
+                               mem_info, 2);
+               if (dma_declare_coherent_memory(dev->mem_dev_l, mem_info[0],
+                               mem_info[0], mem_info[1],
+                               DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0) {
+                       mfc_err("Failed to declare coherent memory for\n"
+                                       "MFC device\n");
+                       ret = -ENOMEM;
+                       goto err_res;
+               }
 
-       dev->mem_dev_r = device_find_child(&dev->plat_dev->dev, "s5p-mfc-r",
-                                          match_child);
-       if (!dev->mem_dev_r) {
-               mfc_err("Mem child (R) device get failed\n");
-               ret = -ENODEV;
-               goto err_res;
+               dev->mem_dev_r = kzalloc(sizeof(struct device), GFP_KERNEL);
+               if (!dev->mem_dev_r) {
+                       mfc_err("Not enough memory\n");
+                       ret = -ENOMEM;
+                       goto err_res;
+               }
+               of_property_read_u32_array(pdev->dev.of_node, "samsung,mfc-r",
+                               mem_info, 2);
+               if (dma_declare_coherent_memory(dev->mem_dev_r, mem_info[0],
+                               mem_info[0], mem_info[1],
+                               DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0) {
+                       pr_err("Failed to declare coherent memory for\n"
+                                       "MFC device\n");
+                       ret = -ENOMEM;
+                       goto err_res;
+               }
+       } else {
+               dev->mem_dev_l = device_find_child(&dev->plat_dev->dev,
+                               "s5p-mfc-l", match_child);
+               if (!dev->mem_dev_l) {
+                       mfc_err("Mem child (L) device get failed\n");
+                       ret = -ENODEV;
+                       goto err_res;
+               }
+               dev->mem_dev_r = device_find_child(&dev->plat_dev->dev,
+                               "s5p-mfc-r", match_child);
+               if (!dev->mem_dev_r) {
+                       mfc_err("Mem child (R) device get failed\n");
+                       ret = -ENODEV;
+                       goto err_res;
+               }
        }
 
        dev->alloc_ctx[0] = vb2_dma_contig_init_ctx(dev->mem_dev_l);
@@ -1366,6 +1404,35 @@ static struct platform_device_id mfc_driver_ids[] = {
 };
 MODULE_DEVICE_TABLE(platform, mfc_driver_ids);
 
+static const struct of_device_id exynos_mfc_match[] = {
+       {
+               .compatible = "samsung,mfc-v5",
+               .data = &mfc_drvdata_v5,
+       }, {
+               .compatible = "samsung,mfc-v6",
+               .data = &mfc_drvdata_v6,
+       },
+       {},
+};
+MODULE_DEVICE_TABLE(of, exynos_mfc_match);
+
+static void *mfc_get_drv_data(struct platform_device *pdev)
+{
+       struct s5p_mfc_variant *driver_data = NULL;
+
+       if (pdev->dev.of_node) {
+               const struct of_device_id *match;
+               match = of_match_node(of_match_ptr(exynos_mfc_match),
+                               pdev->dev.of_node);
+               if (match)
+                       driver_data = (struct s5p_mfc_variant *)match->data;
+       } else {
+               driver_data = (struct s5p_mfc_variant *)
+                       platform_get_device_id(pdev)->driver_data;
+       }
+       return driver_data;
+}
+
 static struct platform_driver s5p_mfc_driver = {
        .probe          = s5p_mfc_probe,
        .remove         = __devexit_p(s5p_mfc_remove),
@@ -1373,7 +1440,8 @@ static struct platform_driver s5p_mfc_driver = {
        .driver = {
                .name   = S5P_MFC_NAME,
                .owner  = THIS_MODULE,
-               .pm     = &s5p_mfc_pm_ops
+               .pm     = &s5p_mfc_pm_ops,
+               .of_match_table = exynos_mfc_match,
        },
 };