// 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 <andrzej.p@samsung.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; /* * 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 */