1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/usb/gadget/function/uvc_queue.h b/drivers/usb/gadget/function/uvc_queue.h
new file mode 100644
index 000000000000..8e76ce982f1e
--- /dev/null
+++ b/drivers/usb/gadget/function/uvc_queue.h
@@ -0,0 +1,63 @@
+#ifndef _UVC_QUEUE_H_
+#define _UVC_QUEUE_H_
+
+#ifdef __KERNEL__
+
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/videodev2.h>
+#include <media/videobuf2-core.h>
+
+/* Maximum frame size in bytes, for sanity checking. */
+#define UVC_MAX_FRAME_SIZE      (16*1024*1024)
+/* Maximum number of video buffers. */
+#define UVC_MAX_VIDEO_BUFFERS   32
+
+/* ------------------------------------------------------------------------
+ * Structures.
+ */
+
+enum uvc_buffer_state {
+        UVC_BUF_STATE_IDLE      = 0,
+        UVC_BUF_STATE_QUEUED    = 1,
+        UVC_BUF_STATE_ACTIVE    = 2,
+        UVC_BUF_STATE_DONE      = 3,
+        UVC_BUF_STATE_ERROR     = 4,
+};
+
+struct uvc_buffer {
+        struct vb2_buffer buf;
+        struct list_head queue;
+
+        enum uvc_buffer_state state;
+        void *mem;
+        unsigned int length;
+        unsigned int bytesused;
+};
+
+#define UVC_QUEUE_DISCONNECTED          (1 << 0)
+#define UVC_QUEUE_DROP_INCOMPLETE       (1 << 1)
+#define UVC_QUEUE_PAUSED                (1 << 2)
+
+struct uvc_video_queue {
+        struct vb2_queue queue;
+        struct mutex mutex;     /* Protects queue */
+
+        unsigned int flags;
+        __u32 sequence;
+
+        unsigned int buf_used;
+
+        spinlock_t irqlock;     /* Protects flags and irqqueue */
+        struct list_head irqqueue;
+};
+
+static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
+{
+        return vb2_is_streaming(&queue->queue);
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* _UVC_QUEUE_H_ */
+