145 lines
3.3 KiB
C
145 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* uvc_configfs.h
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*
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* Configfs support for the uvc function.
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*
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* Copyright (c) 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 UVC_CONFIGFS_H
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#define UVC_CONFIGFS_H
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#include <linux/configfs.h>
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#include "u_uvc.h"
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static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item)
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{
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return container_of(to_config_group(item), struct f_uvc_opts,
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func_inst.group);
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}
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#define UVCG_STREAMING_CONTROL_SIZE 1
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DECLARE_UVC_HEADER_DESCRIPTOR(1);
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struct uvcg_control_header {
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struct config_item item;
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struct UVC_HEADER_DESCRIPTOR(1) desc;
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unsigned linked;
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};
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static inline struct uvcg_control_header *to_uvcg_control_header(struct config_item *item)
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{
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return container_of(item, struct uvcg_control_header, item);
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}
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enum uvcg_format_type {
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UVCG_UNCOMPRESSED = 0,
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UVCG_MJPEG,
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UVCG_FRAMEBASED,
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};
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struct uvcg_format {
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struct config_group group;
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enum uvcg_format_type type;
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unsigned linked;
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struct list_head frames;
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unsigned num_frames;
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__u8 bmaControls[UVCG_STREAMING_CONTROL_SIZE];
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};
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struct uvcg_format_ptr {
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struct uvcg_format *fmt;
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struct list_head entry;
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};
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static inline struct uvcg_format *to_uvcg_format(struct config_item *item)
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{
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return container_of(to_config_group(item), struct uvcg_format, group);
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}
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struct uvcg_streaming_header {
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struct config_item item;
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struct uvc_input_header_descriptor desc;
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unsigned linked;
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struct list_head formats;
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unsigned num_fmt;
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};
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static inline struct uvcg_streaming_header *to_uvcg_streaming_header(struct config_item *item)
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{
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return container_of(item, struct uvcg_streaming_header, item);
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}
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struct uvcg_frame_ptr {
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struct uvcg_frame *frm;
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struct list_head entry;
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};
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struct uvcg_frame {
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struct config_item item;
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enum uvcg_format_type fmt_type;
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struct {
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u8 b_length;
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u8 b_descriptor_type;
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u8 b_descriptor_subtype;
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u8 b_frame_index;
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u8 bm_capabilities;
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u16 w_width;
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u16 w_height;
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u32 dw_min_bit_rate;
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u32 dw_max_bit_rate;
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/*
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* dw_max_video_frame_buffer_size is only for uncompressed and
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* mjpeg format
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*/
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u32 dw_max_video_frame_buffer_size;
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u32 dw_default_frame_interval;
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u8 b_frame_interval_type;
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/* dw_bytes_perline is only for framebased format */
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u32 dw_bytes_perline;
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} __attribute__((packed)) frame;
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u32 *dw_frame_interval;
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};
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static inline struct uvcg_frame *to_uvcg_frame(struct config_item *item)
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{
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return container_of(item, struct uvcg_frame, item);
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}
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/* -----------------------------------------------------------------------------
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* streaming/uncompressed/<NAME>
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*/
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struct uvcg_uncompressed {
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struct uvcg_format fmt;
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struct uvc_format_uncompressed desc;
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};
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static inline struct uvcg_uncompressed *to_uvcg_uncompressed(struct config_item *item)
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{
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return container_of(to_uvcg_format(item), struct uvcg_uncompressed, fmt);
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}
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/* -----------------------------------------------------------------------------
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* streaming/mjpeg/<NAME>
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*/
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struct uvcg_mjpeg {
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struct uvcg_format fmt;
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struct uvc_format_mjpeg desc;
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};
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static inline struct uvcg_mjpeg *to_uvcg_mjpeg(struct config_item *item)
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{
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return container_of(to_uvcg_format(item), struct uvcg_mjpeg, fmt);
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}
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int uvcg_attach_configfs(struct f_uvc_opts *opts);
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#endif /* UVC_CONFIGFS_H */
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