v4.19.13 snapshot.
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h
new file mode 100644
index 0000000..93cf78b
--- /dev/null
+++ b/drivers/usb/gadget/function/uvc.h
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * uvc_gadget.h -- USB Video Class Gadget driver
+ *
+ * Copyright (C) 2009-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ */
+
+#ifndef _UVC_GADGET_H_
+#define _UVC_GADGET_H_
+
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/usb/composite.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+
+#include "uvc_queue.h"
+
+struct usb_ep;
+struct usb_request;
+struct uvc_descriptor_header;
+
+/* ------------------------------------------------------------------------
+ * Debugging, printing and logging
+ */
+
+#define UVC_TRACE_PROBE (1 << 0)
+#define UVC_TRACE_DESCR (1 << 1)
+#define UVC_TRACE_CONTROL (1 << 2)
+#define UVC_TRACE_FORMAT (1 << 3)
+#define UVC_TRACE_CAPTURE (1 << 4)
+#define UVC_TRACE_CALLS (1 << 5)
+#define UVC_TRACE_IOCTL (1 << 6)
+#define UVC_TRACE_FRAME (1 << 7)
+#define UVC_TRACE_SUSPEND (1 << 8)
+#define UVC_TRACE_STATUS (1 << 9)
+
+#define UVC_WARN_MINMAX 0
+#define UVC_WARN_PROBE_DEF 1
+
+extern unsigned int uvc_gadget_trace_param;
+
+#define uvc_trace(flag, msg...) \
+ do { \
+ if (uvc_gadget_trace_param & flag) \
+ printk(KERN_DEBUG "uvcvideo: " msg); \
+ } while (0)
+
+#define uvc_warn_once(dev, warn, msg...) \
+ do { \
+ if (!test_and_set_bit(warn, &dev->warnings)) \
+ printk(KERN_INFO "uvcvideo: " msg); \
+ } while (0)
+
+#define uvc_printk(level, msg...) \
+ printk(level "uvcvideo: " msg)
+
+/* ------------------------------------------------------------------------
+ * Driver specific constants
+ */
+
+#define UVC_NUM_REQUESTS 4
+#define UVC_MAX_REQUEST_SIZE 64
+#define UVC_MAX_EVENTS 4
+
+/* ------------------------------------------------------------------------
+ * Structures
+ */
+
+struct uvc_video {
+ struct usb_ep *ep;
+
+ /* Frame parameters */
+ u8 bpp;
+ u32 fcc;
+ unsigned int width;
+ unsigned int height;
+ unsigned int imagesize;
+ struct mutex mutex; /* protects frame parameters */
+
+ /* Requests */
+ unsigned int req_size;
+ struct usb_request *req[UVC_NUM_REQUESTS];
+ __u8 *req_buffer[UVC_NUM_REQUESTS];
+ struct list_head req_free;
+ spinlock_t req_lock;
+
+ void (*encode) (struct usb_request *req, struct uvc_video *video,
+ struct uvc_buffer *buf);
+
+ /* Context data used by the completion handler */
+ __u32 payload_size;
+ __u32 max_payload_size;
+
+ struct uvc_video_queue queue;
+ unsigned int fid;
+};
+
+enum uvc_state {
+ UVC_STATE_DISCONNECTED,
+ UVC_STATE_CONNECTED,
+ UVC_STATE_STREAMING,
+};
+
+struct uvc_device {
+ struct video_device vdev;
+ struct v4l2_device v4l2_dev;
+ enum uvc_state state;
+ struct usb_function func;
+ struct uvc_video video;
+
+ /* Descriptors */
+ struct {
+ const struct uvc_descriptor_header * const *fs_control;
+ const struct uvc_descriptor_header * const *ss_control;
+ const struct uvc_descriptor_header * const *fs_streaming;
+ const struct uvc_descriptor_header * const *hs_streaming;
+ const struct uvc_descriptor_header * const *ss_streaming;
+ } desc;
+
+ unsigned int control_intf;
+ struct usb_ep *control_ep;
+ struct usb_request *control_req;
+ void *control_buf;
+
+ unsigned int streaming_intf;
+
+ /* Events */
+ unsigned int event_length;
+ unsigned int event_setup_out : 1;
+};
+
+static inline struct uvc_device *to_uvc(struct usb_function *f)
+{
+ return container_of(f, struct uvc_device, func);
+}
+
+struct uvc_file_handle {
+ struct v4l2_fh vfh;
+ struct uvc_video *device;
+};
+
+#define to_uvc_file_handle(handle) \
+ container_of(handle, struct uvc_file_handle, vfh)
+
+/* ------------------------------------------------------------------------
+ * Functions
+ */
+
+extern void uvc_function_setup_continue(struct uvc_device *uvc);
+extern void uvc_endpoint_stream(struct uvc_device *dev);
+
+extern void uvc_function_connect(struct uvc_device *uvc);
+extern void uvc_function_disconnect(struct uvc_device *uvc);
+
+#endif /* _UVC_GADGET_H_ */