Added missing tegra files.HEADmaster

1 files changed, 126 insertions, 0 deletions

diff --git a/drivers/media/video/uvc/uvc_entity.c b/drivers/media/video/uvc/uvc_entity.c
new file mode 100644
index 00000000000..29e239911d0
--- /dev/null
+++ b/drivers/media/video/uvc/uvc_entity.c
@@ -0,0 +1,126 @@
+/*
+ *      uvc_entity.c  --  USB Video Class driver
+ *
+ *      Copyright (C) 2005-2011
+ *          Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+ *      (at your option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-common.h>
+
+#include "uvcvideo.h"
+
+/* ------------------------------------------------------------------------
+ * Video subdevices registration and unregistration
+ */
+
+static int uvc_mc_register_entity(struct uvc_video_chain *chain,
+        struct uvc_entity *entity)
+{
+        const u32 flags = MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE;
+        struct media_entity *sink;
+        unsigned int i;
+        int ret;
+
+        sink = (UVC_ENTITY_TYPE(entity) == UVC_TT_STREAMING)
+             ? (entity->vdev ? &entity->vdev->entity : NULL)
+             : &entity->subdev.entity;
+        if (sink == NULL)
+                return 0;
+
+        for (i = 0; i < entity->num_pads; ++i) {
+                struct media_entity *source;
+                struct uvc_entity *remote;
+                u8 remote_pad;
+
+                if (!(entity->pads[i].flags & MEDIA_PAD_FL_SINK))
+                        continue;
+
+                remote = uvc_entity_by_id(chain->dev, entity->baSourceID[i]);
+                if (remote == NULL)
+                        return -EINVAL;
+
+                source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING)
+                       ? (remote->vdev ? &remote->vdev->entity : NULL)
+                       : &remote->subdev.entity;
+                if (source == NULL)
+                        continue;
+
+                remote_pad = remote->num_pads - 1;
+                ret = media_entity_create_link(source, remote_pad,
+                                               sink, i, flags);
+                if (ret < 0)
+                        return ret;
+        }
+
+        if (UVC_ENTITY_TYPE(entity) == UVC_TT_STREAMING)
+                return 0;
+
+        return v4l2_device_register_subdev(&chain->dev->vdev, &entity->subdev);
+}
+
+static struct v4l2_subdev_ops uvc_subdev_ops = {
+};
+
+void uvc_mc_cleanup_entity(struct uvc_entity *entity)
+{
+        if (UVC_ENTITY_TYPE(entity) != UVC_TT_STREAMING)
+                media_entity_cleanup(&entity->subdev.entity);
+        else if (entity->vdev != NULL)
+                media_entity_cleanup(&entity->vdev->entity);
+}
+
+static int uvc_mc_init_entity(struct uvc_entity *entity)
+{
+        int ret;
+
+        if (UVC_ENTITY_TYPE(entity) != UVC_TT_STREAMING) {
+                v4l2_subdev_init(&entity->subdev, &uvc_subdev_ops);
+                strlcpy(entity->subdev.name, entity->name,
+                        sizeof(entity->subdev.name));
+
+                ret = media_entity_init(&entity->subdev.entity,
+                                        entity->num_pads, entity->pads, 0);
+        } else if (entity->vdev != NULL) {
+                ret = media_entity_init(&entity->vdev->entity,
+                                        entity->num_pads, entity->pads, 0);
+        } else
+                ret = 0;
+
+        return ret;
+}
+
+int uvc_mc_register_entities(struct uvc_video_chain *chain)
+{
+        struct uvc_entity *entity;
+        int ret;
+
+        list_for_each_entry(entity, &chain->entities, chain) {
+                ret = uvc_mc_init_entity(entity);
+                if (ret < 0) {
+                        uvc_printk(KERN_INFO, "Failed to initialize entity for "
+                                   "entity %u\n", entity->id);
+                        return ret;
+                }
+        }
+
+        list_for_each_entry(entity, &chain->entities, chain) {
+                ret = uvc_mc_register_entity(chain, entity);
+                if (ret < 0) {
+                        uvc_printk(KERN_INFO, "Failed to register entity for "
+                                   "entity %u\n", entity->id);
+                        return ret;
+                }
+        }
+
+        return 0;
+}