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/* SPDX-License-Identifier: GPL-2.0 */
/*
* uvc_configfs.h
*
* Configfs support for the uvc function.
*
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
*/
#ifndef UVC_CONFIGFS_H
#define UVC_CONFIGFS_H
#include <linux/configfs.h>
#include "u_uvc.h"
static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item)
{
return container_of(to_config_group(item), struct f_uvc_opts,
func_inst.group);
}
#define UVCG_STREAMING_CONTROL_SIZE 1
DECLARE_UVC_HEADER_DESCRIPTOR(1);
struct uvcg_control_header {
struct config_item item;
struct UVC_HEADER_DESCRIPTOR(1) desc;
unsigned linked;
};
static inline struct uvcg_control_header *to_uvcg_control_header(struct config_item *item)
{
return container_of(item, struct uvcg_control_header, item);
}
enum uvcg_format_type {
UVCG_UNCOMPRESSED = 0,
UVCG_MJPEG,
};
struct uvcg_format {
struct config_group group;
enum uvcg_format_type type;
unsigned linked;
unsigned num_frames;
__u8 bmaControls[UVCG_STREAMING_CONTROL_SIZE];
};
struct uvcg_format_ptr {
struct uvcg_format *fmt;
struct list_head entry;
};
static inline struct uvcg_format *to_uvcg_format(struct config_item *item)
{
return container_of(to_config_group(item), struct uvcg_format, group);
}
struct uvcg_streaming_header {
struct config_item item;
struct uvc_input_header_descriptor desc;
unsigned linked;
struct list_head formats;
unsigned num_fmt;
};
static inline struct uvcg_streaming_header *to_uvcg_streaming_header(struct config_item *item)
{
return container_of(item, struct uvcg_streaming_header, item);
}
struct uvcg_frame {
struct config_item item;
enum uvcg_format_type fmt_type;
struct {
u8 b_length;
u8 b_descriptor_type;
u8 b_descriptor_subtype;
u8 b_frame_index;
u8 bm_capabilities;
u16 w_width;
u16 w_height;
u32 dw_min_bit_rate;
u32 dw_max_bit_rate;
u32 dw_max_video_frame_buffer_size;
u32 dw_default_frame_interval;
u8 b_frame_interval_type;
} __attribute__((packed)) frame;
u32 *dw_frame_interval;
};
static inline struct uvcg_frame *to_uvcg_frame(struct config_item *item)
{
return container_of(item, struct uvcg_frame, item);
}
/* -----------------------------------------------------------------------------
* streaming/uncompressed/<NAME>
*/
struct uvcg_uncompressed {
struct uvcg_format fmt;
struct uvc_format_uncompressed desc;
};
static inline struct uvcg_uncompressed *to_uvcg_uncompressed(struct config_item *item)
{
return container_of(to_uvcg_format(item), struct uvcg_uncompressed, fmt);
}
/* -----------------------------------------------------------------------------
* streaming/mjpeg/<NAME>
*/
struct uvcg_mjpeg {
struct uvcg_format fmt;
struct uvc_format_mjpeg desc;
};
static inline struct uvcg_mjpeg *to_uvcg_mjpeg(struct config_item *item)
{
return container_of(to_uvcg_format(item), struct uvcg_mjpeg, fmt);
}
int uvcg_attach_configfs(struct f_uvc_opts *opts);
#endif /* UVC_CONFIGFS_H */
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