/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_GSMMUX_H
#define _LINUX_GSMMUX_H

#include <linux/if.h>
#include <linux/ioctl.h>
#include <linux/types.h>

struct gsm_config
{
    unsigned int adaption;
    unsigned int encapsulation;
    unsigned int initiator;
    unsigned int t1;
    unsigned int t2;
    unsigned int t3;
    unsigned int n2;
    unsigned int mru;
    unsigned int mtu;
    unsigned int k;
    unsigned int i;
    unsigned int unused[8];    /* Can not be used */
};

#define GSMIOC_GETCONF        _IOR('G', 0, struct gsm_config)
#define GSMIOC_SETCONF        _IOW('G', 1, struct gsm_config)

struct gsm_netconfig {
    unsigned int adaption;  /* Adaption to use in network mode */
    unsigned short protocol;/* Protocol to use - only ETH_P_IP supported */
    unsigned short unused2;    /* Can not be used */
    char if_name[IFNAMSIZ];    /* interface name format string */
    __u8 unused[28];        /* Can not be used */
};

#define GSMIOC_ENABLE_NET      _IOW('G', 2, struct gsm_netconfig)
#define GSMIOC_DISABLE_NET     _IO('G', 3)

/* get the base tty number for a configured gsmmux tty */
#define GSMIOC_GETFIRST        _IOR('G', 4, __u32)

struct gsm_config_ext {
    __u32 keep_alive;    /* Control channel keep-alive in 1/100th of a
                 * second (0 to disable)
                 */
    __u32 wait_config;    /* Wait for DLCI config before opening virtual link? */
    __u32 reserved[6];    /* For future use, must be initialized to zero */
};

#define GSMIOC_GETCONF_EXT    _IOR('G', 5, struct gsm_config_ext)
#define GSMIOC_SETCONF_EXT    _IOW('G', 6, struct gsm_config_ext)

/* Set channel accordingly before calling GSMIOC_GETCONF_DLCI. */
struct gsm_dlci_config {
    __u32 channel;        /* DLCI (0 for the associated DLCI) */
    __u32 adaption;        /* Convergence layer type */
    __u32 mtu;        /* Maximum transfer unit */
    __u32 priority;        /* Priority (0 for default value) */
    __u32 i;        /* Frame type (1 = UIH, 2 = UI) */
    __u32 k;        /* Window size (0 for default value) */
    __u32 reserved[8];    /* For future use, must be initialized to zero */
};

#define GSMIOC_GETCONF_DLCI    _IOWR('G', 7, struct gsm_dlci_config)
#define GSMIOC_SETCONF_DLCI    _IOW('G', 8, struct gsm_dlci_config)

#endif