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Diffstat (limited to 'kernel/drivers/usb/gadget/function/uvc_queue.h')
-rw-r--r--kernel/drivers/usb/gadget/function/uvc_queue.h96
1 files changed, 96 insertions, 0 deletions
diff --git a/kernel/drivers/usb/gadget/function/uvc_queue.h b/kernel/drivers/usb/gadget/function/uvc_queue.h
new file mode 100644
index 000000000..01ca9eab3
--- /dev/null
+++ b/kernel/drivers/usb/gadget/function/uvc_queue.h
@@ -0,0 +1,96 @@
+#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;
+
+ 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);
+}
+
+int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
+ struct mutex *lock);
+
+void uvcg_free_buffers(struct uvc_video_queue *queue);
+
+int uvcg_alloc_buffers(struct uvc_video_queue *queue,
+ struct v4l2_requestbuffers *rb);
+
+int uvcg_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf);
+
+int uvcg_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf);
+
+int uvcg_dequeue_buffer(struct uvc_video_queue *queue,
+ struct v4l2_buffer *buf, int nonblocking);
+
+unsigned int uvcg_queue_poll(struct uvc_video_queue *queue,
+ struct file *file, poll_table *wait);
+
+int uvcg_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma);
+
+#ifndef CONFIG_MMU
+unsigned long uvcg_queue_get_unmapped_area(struct uvc_video_queue *queue,
+ unsigned long pgoff);
+#endif /* CONFIG_MMU */
+
+void uvcg_queue_cancel(struct uvc_video_queue *queue, int disconnect);
+
+int uvcg_queue_enable(struct uvc_video_queue *queue, int enable);
+
+struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue,
+ struct uvc_buffer *buf);
+
+struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue);
+
+#endif /* __KERNEL__ */
+
+#endif /* _UVC_QUEUE_H_ */
+