104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* u_uvc.h
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*
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* Utility definitions for the uvc function
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*
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* Copyright (c) 2013-2014 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
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*/
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#ifndef U_UVC_H
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#define U_UVC_H
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#include <linux/mutex.h>
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#include <linux/usb/composite.h>
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#include <linux/usb/video.h>
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#define fi_to_f_uvc_opts(f) container_of(f, struct f_uvc_opts, func_inst)
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struct f_uvc_opts {
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struct usb_function_instance func_inst;
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unsigned int streaming_interval;
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unsigned int streaming_maxpacket;
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unsigned int streaming_maxburst;
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unsigned int control_interface;
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unsigned int streaming_interface;
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char function_name[32];
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unsigned int last_unit_id;
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bool enable_interrupt_ep;
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/*
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* Control descriptors array pointers for full-/high-speed and
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* super-speed. They point by default to the uvc_fs_control_cls and
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* uvc_ss_control_cls arrays respectively. Legacy gadgets must
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* override them in their gadget bind callback.
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*/
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const struct uvc_descriptor_header * const *fs_control;
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const struct uvc_descriptor_header * const *ss_control;
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/*
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* Streaming descriptors array pointers for full-speed, high-speed and
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* super-speed. They will point to the uvc_[fhs]s_streaming_cls arrays
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* for configfs-based gadgets. Legacy gadgets must initialize them in
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* their gadget bind callback.
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*/
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const struct uvc_descriptor_header * const *fs_streaming;
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const struct uvc_descriptor_header * const *hs_streaming;
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const struct uvc_descriptor_header * const *ss_streaming;
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/* Default control descriptors for configfs-based gadgets. */
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struct uvc_camera_terminal_descriptor uvc_camera_terminal;
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struct uvc_processing_unit_descriptor uvc_processing;
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struct uvc_output_terminal_descriptor uvc_output_terminal;
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/*
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* Control descriptors pointers arrays for full-/high-speed and
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* super-speed. The first element is a configurable control header
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* descriptor, the other elements point to the fixed default control
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* descriptors. Used by configfs only, must not be touched by legacy
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* gadgets.
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*/
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struct uvc_descriptor_header *uvc_fs_control_cls[5];
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struct uvc_descriptor_header *uvc_ss_control_cls[5];
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/*
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* Control descriptors for extension units. There could be any number
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* of these, including none at all.
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*/
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struct list_head extension_units;
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/*
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* Streaming descriptors for full-speed, high-speed and super-speed.
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* Used by configfs only, must not be touched by legacy gadgets. The
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* arrays are allocated at runtime as the number of descriptors isn't
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* known in advance.
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*/
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struct uvc_descriptor_header **uvc_fs_streaming_cls;
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struct uvc_descriptor_header **uvc_hs_streaming_cls;
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struct uvc_descriptor_header **uvc_ss_streaming_cls;
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/*
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* Indexes into the function's string descriptors allowing users to set
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* custom descriptions rather than the hard-coded defaults.
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*/
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u8 iad_index;
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u8 vs0_index;
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u8 vs1_index;
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/*
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* Read/write access to configfs attributes is handled by configfs.
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*
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* This lock protects the descriptors from concurrent access by
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* read/write and symlink creation/removal.
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*/
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struct mutex lock;
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int refcnt;
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};
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#endif /* U_UVC_H */
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