1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * u_uvc.h 4 * 5 * Utility definitions for the uvc function 6 * 7 * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd. 8 * http://www.samsung.com 9 * 10 * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com> 11 */ 12 13 #ifndef U_UVC_H 14 #define U_UVC_H 15 16 #include <linux/mutex.h> 17 #include <linux/usb/composite.h> 18 #include <linux/usb/video.h> 19 20 #define fi_to_f_uvc_opts(f) container_of(f, struct f_uvc_opts, func_inst) 21 22 struct f_uvc_opts { 23 struct usb_function_instance func_inst; 24 unsigned int streaming_interval; 25 unsigned int streaming_maxpacket; 26 unsigned int streaming_maxburst; 27 28 unsigned int control_interface; 29 unsigned int streaming_interface; 30 char function_name[32]; 31 32 bool enable_interrupt_ep; 33 34 /* 35 * Control descriptors array pointers for full-/high-speed and 36 * super-speed. They point by default to the uvc_fs_control_cls and 37 * uvc_ss_control_cls arrays respectively. Legacy gadgets must 38 * override them in their gadget bind callback. 39 */ 40 const struct uvc_descriptor_header * const *fs_control; 41 const struct uvc_descriptor_header * const *ss_control; 42 43 /* 44 * Streaming descriptors array pointers for full-speed, high-speed and 45 * super-speed. They will point to the uvc_[fhs]s_streaming_cls arrays 46 * for configfs-based gadgets. Legacy gadgets must initialize them in 47 * their gadget bind callback. 48 */ 49 const struct uvc_descriptor_header * const *fs_streaming; 50 const struct uvc_descriptor_header * const *hs_streaming; 51 const struct uvc_descriptor_header * const *ss_streaming; 52 53 /* Default control descriptors for configfs-based gadgets. */ 54 struct uvc_camera_terminal_descriptor uvc_camera_terminal; 55 struct uvc_processing_unit_descriptor uvc_processing; 56 struct uvc_output_terminal_descriptor uvc_output_terminal; 57 58 /* 59 * Control descriptors pointers arrays for full-/high-speed and 60 * super-speed. The first element is a configurable control header 61 * descriptor, the other elements point to the fixed default control 62 * descriptors. Used by configfs only, must not be touched by legacy 63 * gadgets. 64 */ 65 struct uvc_descriptor_header *uvc_fs_control_cls[5]; 66 struct uvc_descriptor_header *uvc_ss_control_cls[5]; 67 68 /* 69 * Streaming descriptors for full-speed, high-speed and super-speed. 70 * Used by configfs only, must not be touched by legacy gadgets. The 71 * arrays are allocated at runtime as the number of descriptors isn't 72 * known in advance. 73 */ 74 struct uvc_descriptor_header **uvc_fs_streaming_cls; 75 struct uvc_descriptor_header **uvc_hs_streaming_cls; 76 struct uvc_descriptor_header **uvc_ss_streaming_cls; 77 78 /* 79 * Read/write access to configfs attributes is handled by configfs. 80 * 81 * This lock protects the descriptors from concurrent access by 82 * read/write and symlink creation/removal. 83 */ 84 struct mutex lock; 85 int refcnt; 86 }; 87 88 #endif /* U_UVC_H */ 89