1 // SPDX-License-Identifier: GPL-2.0
5 * Utility definitions for the uvc function
7 * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd.
8 * http://www.samsung.com
10 * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
20 #include <linux/usb/composite.h>
21 #include <linux/usb/video.h>
23 #define fi_to_f_uvc_opts(f) container_of(f, struct f_uvc_opts, func_inst)
26 struct usb_function_instance func_inst;
27 unsigned int uvc_gadget_trace_param;
28 unsigned int streaming_interval;
29 unsigned int streaming_maxpacket;
30 unsigned int streaming_maxburst;
33 * Control descriptors array pointers for full-/high-speed and
34 * super-speed. They point by default to the uvc_fs_control_cls and
35 * uvc_ss_control_cls arrays respectively. Legacy gadgets must
36 * override them in their gadget bind callback.
38 const struct uvc_descriptor_header * const *fs_control;
39 const struct uvc_descriptor_header * const *ss_control;
42 * Streaming descriptors array pointers for full-speed, high-speed and
43 * super-speed. They will point to the uvc_[fhs]s_streaming_cls arrays
44 * for configfs-based gadgets. Legacy gadgets must initialize them in
45 * their gadget bind callback.
47 const struct uvc_descriptor_header * const *fs_streaming;
48 const struct uvc_descriptor_header * const *hs_streaming;
49 const struct uvc_descriptor_header * const *ss_streaming;
51 /* Default control descriptors for configfs-based gadgets. */
52 struct uvc_camera_terminal_descriptor uvc_camera_terminal;
53 struct uvc_processing_unit_descriptor uvc_processing;
54 struct uvc_output_terminal_descriptor uvc_output_terminal;
55 struct uvc_color_matching_descriptor uvc_color_matching;
58 * Control descriptors pointers arrays for full-/high-speed and
59 * super-speed. The first element is a configurable control header
60 * descriptor, the other elements point to the fixed default control
61 * descriptors. Used by configfs only, must not be touched by legacy
64 struct uvc_descriptor_header *uvc_fs_control_cls[5];
65 struct uvc_descriptor_header *uvc_ss_control_cls[5];
68 * Streaming descriptors for full-speed, high-speed and super-speed.
69 * Used by configfs only, must not be touched by legacy gadgets. The
70 * arrays are allocated at runtime as the number of descriptors isn't
73 struct uvc_descriptor_header **uvc_fs_streaming_cls;
74 struct uvc_descriptor_header **uvc_hs_streaming_cls;
75 struct uvc_descriptor_header **uvc_ss_streaming_cls;
78 * Read/write access to configfs attributes is handled by configfs.
80 * This lock protects the descriptors from concurrent access by
81 * read/write and symlink creation/removal.
87 void uvc_set_trace_param(unsigned int trace);