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-rw-r--r--drivers/usb/gadget/function/u_uvc.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/u_uvc.h b/drivers/usb/gadget/function/u_uvc.h
new file mode 100644
index 000000000..24b8681b0
--- /dev/null
+++ b/drivers/usb/gadget/function/u_uvc.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * u_uvc.h
+ *
+ * Utility definitions for the uvc function
+ *
+ * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
+ */
+
+#ifndef U_UVC_H
+#define U_UVC_H
+
+#include <linux/mutex.h>
+#include <linux/usb/composite.h>
+#include <linux/usb/video.h>
+
+#define fi_to_f_uvc_opts(f) container_of(f, struct f_uvc_opts, func_inst)
+
+struct f_uvc_opts {
+ struct usb_function_instance func_inst;
+ unsigned int streaming_interval;
+ unsigned int streaming_maxpacket;
+ unsigned int streaming_maxburst;
+
+ unsigned int control_interface;
+ unsigned int streaming_interface;
+ char function_name[32];
+
+ /*
+ * Control descriptors array pointers for full-/high-speed and
+ * super-speed. They point by default to the uvc_fs_control_cls and
+ * uvc_ss_control_cls arrays respectively. Legacy gadgets must
+ * override them in their gadget bind callback.
+ */
+ const struct uvc_descriptor_header * const *fs_control;
+ const struct uvc_descriptor_header * const *ss_control;
+
+ /*
+ * Streaming descriptors array pointers for full-speed, high-speed and
+ * super-speed. They will point to the uvc_[fhs]s_streaming_cls arrays
+ * for configfs-based gadgets. Legacy gadgets must initialize them in
+ * their gadget bind callback.
+ */
+ const struct uvc_descriptor_header * const *fs_streaming;
+ const struct uvc_descriptor_header * const *hs_streaming;
+ const struct uvc_descriptor_header * const *ss_streaming;
+
+ /* Default control descriptors for configfs-based gadgets. */
+ struct uvc_camera_terminal_descriptor uvc_camera_terminal;
+ struct uvc_processing_unit_descriptor uvc_processing;
+ struct uvc_output_terminal_descriptor uvc_output_terminal;
+ struct uvc_color_matching_descriptor uvc_color_matching;
+
+ /*
+ * Control descriptors pointers arrays for full-/high-speed and
+ * super-speed. The first element is a configurable control header
+ * descriptor, the other elements point to the fixed default control
+ * descriptors. Used by configfs only, must not be touched by legacy
+ * gadgets.
+ */
+ struct uvc_descriptor_header *uvc_fs_control_cls[5];
+ struct uvc_descriptor_header *uvc_ss_control_cls[5];
+
+ /*
+ * Streaming descriptors for full-speed, high-speed and super-speed.
+ * Used by configfs only, must not be touched by legacy gadgets. The
+ * arrays are allocated at runtime as the number of descriptors isn't
+ * known in advance.
+ */
+ struct uvc_descriptor_header **uvc_fs_streaming_cls;
+ struct uvc_descriptor_header **uvc_hs_streaming_cls;
+ struct uvc_descriptor_header **uvc_ss_streaming_cls;
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This lock protects the descriptors from concurrent access by
+ * read/write and symlink creation/removal.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+#endif /* U_UVC_H */