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/* SPDX-License-Identifier: LGPL-2.1-only */
/*
* Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*/
#ifndef _MEDIA_INFO_H
#define _MEDIA_INFO_H
enum media_type {
MEDIA_TYPE_CANT_STAT,
MEDIA_TYPE_UNKNOWN,
MEDIA_TYPE_VIDEO,
MEDIA_TYPE_VBI,
MEDIA_TYPE_RADIO,
MEDIA_TYPE_SDR,
MEDIA_TYPE_TOUCH,
MEDIA_TYPE_SUBDEV,
MEDIA_TYPE_DVB_FRONTEND,
MEDIA_TYPE_DVB_DEMUX,
MEDIA_TYPE_DVB_DVR,
MEDIA_TYPE_DVB_NET,
MEDIA_TYPE_DTV_CA,
MEDIA_TYPE_MEDIA,
};
/*
* Detect what type the device is.
*/
media_type mi_media_detect_type(const char *device);
/*
* Return the device name given the major and minor numbers.
*/
std::string mi_media_get_device(__u32 major, __u32 minor);
/*
* For a given device fd retrieve the dev_t (major/minor) value.
* Returns 0 if successful (and fills in *dev) and -1 on failure.
*/
int mi_get_dev_t_from_fd(int fd, dev_t *dev);
/*
* For a given dev_t value (major/minor), find the corresponding
* device name.
* Returns the /dev/... path if successful, or an empty string on
* failure.
*/
std::string mi_get_devpath_from_dev_t(dev_t dev);
/*
* For a given device fd return the corresponding media device
* or -1 if there is none.
*
* If bus_info is not NULL, then find the media device that
* matches the given bus_info.
*/
int mi_get_media_fd(int fd, const char *bus_info = NULL);
/* Return entity flags description */
std::string mi_entflags2s(__u32 flags);
/* Return interface flags description */
std::string mi_ifacetype2s(__u32 type);
/* Return true if this function requires an interface */
bool mi_func_requires_intf(__u32 function);
/* Return function description */
std::string mi_entfunction2s(__u32 function, bool *is_invalid = NULL);
/* Return pad flags description */
std::string mi_padflags2s(__u32 flags);
/* Return link flags description */
std::string mi_linkflags2s(__u32 flags);
/*
* Show media controller information media_fd and (if >= 0) the
* corresponsing entity/interface information for the fd.
*
* If is_invalid != NULL, then set it to true if errors are detected
* in the media information.
*
* Return 0 if the driver doesn't support MEDIA_IOC_G_TOPOLOGY.
* Return MEDIA_ENT_F_UNKNOWN if it does support this but there were
* errors reading the topology. Otherwise return the entity ID of fd.
*/
__u32 mi_media_info_for_fd(int media_fd, int fd, bool *is_invalid = NULL);
#endif
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