Merge tag 'isdn-removal' of https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground

Arnd Bergmann says:

====================
isdn: deprecate non-mISDN drivers

When isdn4linux came up in the context of another patch series, I
remembered that we had discussed removing it a while ago.

It turns out that the suggestion from Karsten Keil wa to remove I4L
in 2018 after the last public ISDN networks are shut down. This has
happened now (with a very small number of exceptions), so I guess it's
time to try again.

We currently have three ISDN stacks in the kernel: the original
isdn4linux (with the hisax driver), the newer CAPI (with four drivers),
and finally the mISDN stack (supporting roughly the same hardware as
hisax).

As far as I can tell, anyone using ISDN with mainline kernel drivers in
the past few years uses mISDN, and this is typically used for voice-only
PBX installations that don't require a public network.

The older stacks support additional features for data networks, but those
typically make no sense any more if there is no network to connect to.

My proposal for this time is to kill off isdn4linux entirely, as it seems
to have been unusable for quite a while. This code has been abandoned
for many years and it does cause problems for treewide maintenance as
it tends to do everything that we try to stop doing.
Birger Harzenetter mentioned that is is still using i4l in order to
make use of the 'divert' feature that is not part of mISDN, but has
otherwise moved on to mISDN for normal operation, like apparently
everyone else.

CAPI in turn is not quite as obsolete, but two of the drivers (avm
and hysdn) don't seem to be used at all, while another one (gigaset)
will stop being maintained as Paul Bolle is no longer able to
test it after the network gets shut down in September.
All three are now moved into drivers/staging to let others speak
up in case there are remaining users.
This leaves Bluetooth CMTP as the only remaining user of CAPI, but
Marcel Holtmann wishes to keep maintaining it.

For the discussion on version 1, see [2]
Unfortunately, Karsten Keil as the maintainer has not participated in
the discussion.

      Arnd

[1] https://patchwork.kernel.org/patch/8484861/#17900371
[2] https://listserv.isdn4linux.de/pipermail/isdn4linux/2019-April/thread.html
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

7 files changed, 0 insertions, 1399 deletions

diff --git a/include/linux/concap.h b/include/linux/concap.h
deleted file mode 100644
index 977acb3d1fb2..000000000000
--- a/include/linux/concap.h
+++ /dev/null
@@ -1,112 +0,0 @@
-/* $Id: concap.h,v 1.3.2.2 2004/01/12 23:08:35 keil Exp $
- *
- * Copyright 1997 by Henner Eisen <eis@baty.hanse.de>
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- */
-
-#ifndef _LINUX_CONCAP_H
-#define _LINUX_CONCAP_H
-
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-
-/* Stuff to support encapsulation protocols genericly. The encapsulation
-   protocol is processed at the uppermost layer of the network interface.
-
-   Based on a ideas developed in a 'synchronous device' thread in the
-   linux-x25 mailing list contributed by Alan Cox, Thomasz Motylewski
-   and Jonathan Naylor.
-
-   For more documetation on this refer to Documentation/isdn/README.concap
-*/
-
-struct concap_proto_ops;
-struct concap_device_ops;
-
-/* this manages all data needed by the encapsulation protocol
- */
-struct concap_proto{
-	struct net_device *net_dev;	/* net device using our service  */
-	struct concap_device_ops *dops;	/* callbacks provided by device */
- 	struct concap_proto_ops  *pops;	/* callbacks provided by us */
- 	spinlock_t lock;
-	int flags;
-	void *proto_data;		/* protocol specific private data, to
-					   be accessed via *pops methods only*/
-	/*
-	  :
-	  whatever 
-	  :
-	  */
-};
-
-/* Operations to be supported by the net device. Called by the encapsulation
- * protocol entity. No receive method is offered because the encapsulation
- * protocol directly calls netif_rx().
- */
-struct concap_device_ops{
-
-	/* to request data is submitted by device*/ 
-	int (*data_req)(struct concap_proto *, struct sk_buff *);
-
-	/* Control methods must be set to NULL by devices which do not
-	   support connection control.*/
-	/* to request a connection is set up */ 
-	int (*connect_req)(struct concap_proto *);
-
-	/* to request a connection is released */
-	int (*disconn_req)(struct concap_proto *);	
-};
-
-/* Operations to be supported by the encapsulation protocol. Called by
- * device driver.
- */
-struct concap_proto_ops{
-
-	/* create a new encapsulation protocol instance of same type */
-	struct concap_proto *  (*proto_new) (void);
-
-	/* delete encapsulation protocol instance and free all its resources.
-	   cprot may no loger be referenced after calling this */
-	void (*proto_del)(struct concap_proto *cprot);
-
-	/* initialize the protocol's data. To be called at interface startup
-	   or when the device driver resets the interface. All services of the
-	   encapsulation protocol may be used after this*/
-	int (*restart)(struct concap_proto *cprot, 
-		       struct net_device *ndev,
-		       struct concap_device_ops *dops);
-
-	/* inactivate an encapsulation protocol instance. The encapsulation
-	   protocol may not call any *dops methods after this. */
-	int (*close)(struct concap_proto *cprot);
-
-	/* process a frame handed down to us by upper layer */
-	int (*encap_and_xmit)(struct concap_proto *cprot, struct sk_buff *skb);
-
-	/* to be called for each data entity received from lower layer*/ 
-	int (*data_ind)(struct concap_proto *cprot, struct sk_buff *skb);
-
-	/* to be called when a connection was set up/down.
-	   Protocols that don't process these primitives might fill in
-	   dummy methods here */
-	int (*connect_ind)(struct concap_proto *cprot);
-	int (*disconn_ind)(struct concap_proto *cprot);
-  /*
-    Some network device support functions, like net_header(), rebuild_header(),
-    and others, that depend solely on the encapsulation protocol, might
-    be provided here, too. The net device would just fill them in its
-    corresponding fields when it is opened.
-    */
-};
-
-/* dummy restart/close/connect/reset/disconn methods
- */
-extern int concap_nop(struct concap_proto *cprot); 
-
-/* dummy submit method
- */
-extern int concap_drop_skb(struct concap_proto *cprot, struct sk_buff *skb);
-#endif
diff --git a/include/linux/isdn.h b/include/linux/isdn.h
deleted file mode 100644
index df97c8444f5d..000000000000
--- a/include/linux/isdn.h
+++ /dev/null
@@ -1,473 +0,0 @@
-/* $Id: isdn.h,v 1.125.2.3 2004/02/10 01:07:14 keil Exp $
- *
- * Main header for the Linux ISDN subsystem (linklevel).
- *
- * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
- * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
- * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
- * 
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-#ifndef __ISDN_H__
-#define __ISDN_H__
-
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/major.h>
-#include <asm/io.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/slab.h>
-#include <linux/timer.h>
-#include <linux/wait.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_reg.h>
-#include <linux/fcntl.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/ip.h>
-#include <linux/in.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/tcp.h>
-#include <linux/mutex.h>
-#include <uapi/linux/isdn.h>
-
-#define ISDN_TTY_MAJOR    43
-#define ISDN_TTYAUX_MAJOR 44
-#define ISDN_MAJOR        45
-
-/* The minor-devicenumbers for Channel 0 and 1 are used as arguments for
- * physical Channel-Mapping, so they MUST NOT be changed without changing
- * the correspondent code in isdn.c
- */
-
-#define ISDN_MINOR_B        0
-#define ISDN_MINOR_BMAX     (ISDN_MAX_CHANNELS-1)
-#define ISDN_MINOR_CTRL     64
-#define ISDN_MINOR_CTRLMAX  (64 + (ISDN_MAX_CHANNELS-1))
-#define ISDN_MINOR_PPP      128
-#define ISDN_MINOR_PPPMAX   (128 + (ISDN_MAX_CHANNELS-1))
-#define ISDN_MINOR_STATUS   255
-
-#ifdef CONFIG_ISDN_PPP
-
-#ifdef CONFIG_ISDN_PPP_VJ
-#  include <net/slhc_vj.h>
-#endif
-
-#include <linux/ppp_defs.h>
-#include <linux/ppp-ioctl.h>
-
-#include <linux/isdn_ppp.h>
-#endif
-
-#ifdef CONFIG_ISDN_X25
-#  include <linux/concap.h>
-#endif
-
-#include <linux/isdnif.h>
-
-#define ISDN_DRVIOCTL_MASK       0x7f  /* Mask for Device-ioctl */
-
-/* Until now unused */
-#define ISDN_SERVICE_VOICE 1
-#define ISDN_SERVICE_AB    1<<1 
-#define ISDN_SERVICE_X21   1<<2
-#define ISDN_SERVICE_G4    1<<3
-#define ISDN_SERVICE_BTX   1<<4
-#define ISDN_SERVICE_DFUE  1<<5
-#define ISDN_SERVICE_X25   1<<6
-#define ISDN_SERVICE_TTX   1<<7
-#define ISDN_SERVICE_MIXED 1<<8
-#define ISDN_SERVICE_FW    1<<9
-#define ISDN_SERVICE_GTEL  1<<10
-#define ISDN_SERVICE_BTXN  1<<11
-#define ISDN_SERVICE_BTEL  1<<12
-
-/* Macros checking plain usage */
-#define USG_NONE(x)         ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)
-#define USG_RAW(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW)
-#define USG_MODEM(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)
-#define USG_VOICE(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)
-#define USG_NET(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET)
-#define USG_FAX(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX)
-#define USG_OUTGOING(x)     ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING)
-#define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \
-                             ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)     )
-
-/* Timer-delays and scheduling-flags */
-#define ISDN_TIMER_RES         4                         /* Main Timer-Resolution   */
-#define ISDN_TIMER_02SEC       (HZ/ISDN_TIMER_RES/5)     /* Slow-Timer1 .2 sec      */
-#define ISDN_TIMER_1SEC        (HZ/ISDN_TIMER_RES)       /* Slow-Timer2 1 sec       */
-#define ISDN_TIMER_RINGING     5 /* tty RINGs = ISDN_TIMER_1SEC * this factor       */
-#define ISDN_TIMER_KEEPINT    10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */
-#define ISDN_TIMER_MODEMREAD   1
-#define ISDN_TIMER_MODEMPLUS   2
-#define ISDN_TIMER_MODEMRING   4
-#define ISDN_TIMER_MODEMXMIT   8
-#define ISDN_TIMER_NETDIAL    16 
-#define ISDN_TIMER_NETHANGUP  32
-#define ISDN_TIMER_CARRIER   256 /* Wait for Carrier */
-#define ISDN_TIMER_FAST      (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \
-                              ISDN_TIMER_MODEMXMIT)
-#define ISDN_TIMER_SLOW      (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \
-                              ISDN_TIMER_NETDIAL | ISDN_TIMER_CARRIER)
-
-/* Timeout-Values for isdn_net_dial() */
-#define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
-#define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
-#define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
-
-/* GLOBAL_FLAGS */
-#define ISDN_GLOBAL_STOPPED 1
-
-/*=================== Start of ip-over-ISDN stuff =========================*/
-
-/* Feature- and status-flags for a net-interface */
-#define ISDN_NET_CONNECTED  0x01       /* Bound to ISDN-Channel             */
-#define ISDN_NET_SECURE     0x02       /* Accept calls from phonelist only  */
-#define ISDN_NET_CALLBACK   0x04       /* activate callback                 */
-#define ISDN_NET_CBHUP      0x08       /* hangup before callback            */
-#define ISDN_NET_CBOUT      0x10       /* remote machine does callback      */
-
-#define ISDN_NET_MAGIC      0x49344C02 /* for paranoia-checking             */
-
-/* Phone-list-element */
-typedef struct {
-  void *next;
-  char num[ISDN_MSNLEN];
-} isdn_net_phone;
-
-/*
-   Principles when extending structures for generic encapsulation protocol
-   ("concap") support:
-   - Stuff which is hardware specific (here i4l-specific) goes in 
-     the netdev -> local structure (here: isdn_net_local)
-   - Stuff which is encapsulation protocol specific goes in the structure
-     which holds the linux device structure (here: isdn_net_device)
-*/
-
-/* Local interface-data */
-typedef struct isdn_net_local_s {
-  ulong                  magic;
-  struct net_device_stats stats;       /* Ethernet Statistics              */
-  int                    isdn_device;  /* Index to isdn-device             */
-  int                    isdn_channel; /* Index to isdn-channel            */
-  int			 ppp_slot;     /* PPPD device slot number          */
-  int                    pre_device;   /* Preselected isdn-device          */
-  int                    pre_channel;  /* Preselected isdn-channel         */
-  int                    exclusive;    /* If non-zero idx to reserved chan.*/
-  int                    flags;        /* Connection-flags                 */
-  int                    dialretry;    /* Counter for Dialout-retries      */
-  int                    dialmax;      /* Max. Number of Dial-retries      */
-  int                    cbdelay;      /* Delay before Callback starts     */
-  int                    dtimer;       /* Timeout-counter for dialing      */
-  char                   msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */
-  u_char                 cbhup;        /* Flag: Reject Call before Callback*/
-  u_char                 dialstate;    /* State for dialing                */
-  u_char                 p_encap;      /* Packet encapsulation             */
-                                       /*   0 = Ethernet over ISDN         */
-				       /*   1 = RAW-IP                     */
-                                       /*   2 = IP with type field         */
-  u_char                 l2_proto;     /* Layer-2-protocol                 */
-				       /* See ISDN_PROTO_L2..-constants in */
-                                       /* isdnif.h                         */
-                                       /*   0 = X75/LAPB with I-Frames     */
-				       /*   1 = X75/LAPB with UI-Frames    */
-				       /*   2 = X75/LAPB with BUI-Frames   */
-				       /*   3 = HDLC                       */
-  u_char                 l3_proto;     /* Layer-3-protocol                 */
-				       /* See ISDN_PROTO_L3..-constants in */
-                                       /* isdnif.h                         */
-                                       /*   0 = Transparent                */
-  int                    huptimer;     /* Timeout-counter for auto-hangup  */
-  int                    charge;       /* Counter for charging units       */
-  ulong                  chargetime;   /* Timer for Charging info          */
-  int                    hupflags;     /* Flags for charge-unit-hangup:    */
-				       /* bit0: chargeint is invalid       */
-				       /* bit1: Getting charge-interval    */
-                                       /* bit2: Do charge-unit-hangup      */
-                                       /* bit3: Do hangup even on incoming */
-  int                    outgoing;     /* Flag: outgoing call              */
-  int                    onhtime;      /* Time to keep link up             */
-  int                    chargeint;    /* Interval between charge-infos    */
-  int                    onum;         /* Flag: at least 1 outgoing number */
-  int                    cps;          /* current speed of this interface  */
-  int                    transcount;   /* byte-counter for cps-calculation */
-  int                    sqfull;       /* Flag: netdev-queue overloaded    */
-  ulong                  sqfull_stamp; /* Start-Time of overload           */
-  ulong                  slavedelay;   /* Dynamic bundling delaytime       */
-  int                    triggercps;   /* BogoCPS needed for trigger slave */
-  isdn_net_phone         *phone[2];    /* List of remote-phonenumbers      */
-				       /* phone[0] = Incoming Numbers      */
-				       /* phone[1] = Outgoing Numbers      */
-  isdn_net_phone         *dial;        /* Pointer to dialed number         */
-  struct net_device      *master;      /* Ptr to Master device for slaves  */
-  struct net_device      *slave;       /* Ptr to Slave device for masters  */
-  struct isdn_net_local_s *next;       /* Ptr to next link in bundle       */
-  struct isdn_net_local_s *last;       /* Ptr to last link in bundle       */
-  struct isdn_net_dev_s  *netdev;      /* Ptr to netdev                    */
-  struct sk_buff_head    super_tx_queue; /* List of supervisory frames to  */
-	                               /* be transmitted asap              */
-  atomic_t frame_cnt;                  /* number of frames currently       */
-                        	       /* queued in HL driver              */    
-                                       /* Ptr to orig. hard_header_cache   */
-  spinlock_t             xmit_lock;    /* used to protect the xmit path of */
-                                       /* a particular channel (including  */
-                                       /* the frame_cnt                    */
-
-  int  pppbind;                        /* ippp device for bindings         */
-  int					dialtimeout;	/* How long shall we try on dialing? (jiffies) */
-  int					dialwait;		/* How long shall we wait after failed attempt? (jiffies) */
-  ulong					dialstarted;	/* jiffies of first dialing-attempt */
-  ulong					dialwait_timer;	/* jiffies of earliest next dialing-attempt */
-  int					huptimeout;		/* How long will the connection be up? (seconds) */
-#ifdef CONFIG_ISDN_X25
-  struct concap_device_ops *dops;      /* callbacks used by encapsulator   */
-#endif
-  /* use an own struct for that in later versions */
-  ulong cisco_myseq;                   /* Local keepalive seq. for Cisco   */
-  ulong cisco_mineseen;                /* returned keepalive seq. from remote */
-  ulong cisco_yourseq;                 /* Remote keepalive seq. for Cisco  */
-  int cisco_keepalive_period;		/* keepalive period */
-  ulong cisco_last_slarp_in;		/* jiffie of last keepalive packet we received */
-  char cisco_line_state;		/* state of line according to keepalive packets */
-  char cisco_debserint;			/* debugging flag of cisco hdlc with slarp */
-  struct timer_list cisco_timer;
-  struct work_struct tqueue;
-} isdn_net_local;
-
-/* the interface itself */
-typedef struct isdn_net_dev_s {
-  isdn_net_local *local;
-  isdn_net_local *queue;               /* circular list of all bundled
-					  channels, which are currently
-					  online                           */
-  spinlock_t queue_lock;               /* lock to protect queue            */
-  void *next;                          /* Pointer to next isdn-interface   */
-  struct net_device *dev;              /* interface to upper levels        */
-#ifdef CONFIG_ISDN_PPP
-  ippp_bundle * pb;		/* pointer to the common bundle structure
-   			         * with the per-bundle data */
-#endif
-#ifdef CONFIG_ISDN_X25
-  struct concap_proto  *cprot; /* connection oriented encapsulation protocol */
-#endif
-
-} isdn_net_dev;
-
-/*===================== End of ip-over-ISDN stuff ===========================*/
-
-/*======================= Start of ISDN-tty stuff ===========================*/
-
-#define ISDN_ASYNC_MAGIC          0x49344C01 /* for paranoia-checking        */
-#define ISDN_SERIAL_XMIT_SIZE           1024 /* Default bufsize for write    */
-#define ISDN_SERIAL_XMIT_MAX            4000 /* Maximum bufsize for write    */
-
-#ifdef CONFIG_ISDN_AUDIO
-/* For using sk_buffs with audio we need some private variables
- * within each sk_buff. For this purpose, we declare a struct here,
- * and put it always at the private skb->cb data array. A few macros help
- * accessing the variables.
- */
-typedef struct _isdn_audio_data {
-  unsigned short dle_count;
-  unsigned char  lock;
-} isdn_audio_data_t;
-
-#define ISDN_AUDIO_SKB_DLECOUNT(skb)	(((isdn_audio_data_t *)&skb->cb[0])->dle_count)
-#define ISDN_AUDIO_SKB_LOCK(skb)	(((isdn_audio_data_t *)&skb->cb[0])->lock)
-#endif
-
-/* Private data of AT-command-interpreter */
-typedef struct atemu {
-	u_char       profile[ISDN_MODEM_NUMREG]; /* Modem-Regs. Profile 0              */
-	u_char       mdmreg[ISDN_MODEM_NUMREG];  /* Modem-Registers                    */
-	char         pmsn[ISDN_MSNLEN];          /* EAZ/MSNs Profile 0                 */
-	char         msn[ISDN_MSNLEN];           /* EAZ/MSN                            */
-	char         plmsn[ISDN_LMSNLEN];        /* Listening MSNs Profile 0           */
-	char         lmsn[ISDN_LMSNLEN];         /* Listening MSNs                     */
-	char         cpn[ISDN_MSNLEN];           /* CalledPartyNumber on incoming call */
-	char         connmsg[ISDN_CMSGLEN];	 /* CONNECT-Msg from HL-Driver	       */
-#ifdef CONFIG_ISDN_AUDIO
-	u_char       vpar[10];                   /* Voice-parameters                   */
-	int          lastDLE;                    /* Flag for voice-coding: DLE seen    */
-#endif
-	int          mdmcmdl;                    /* Length of Modem-Commandbuffer      */
-	int          pluscount;                  /* Counter for +++ sequence           */
-	u_long       lastplus;                   /* Timestamp of last +                */
-	int	     carrierwait;                /* Seconds of carrier waiting         */
-	char         mdmcmd[255];                /* Modem-Commandbuffer                */
-	unsigned int charge;                     /* Charge units of current connection */
-} atemu;
-
-/* Private data (similar to async_struct in <linux/serial.h>) */
-typedef struct modem_info {
-  int			magic;
-  struct tty_port	port;
-  int			x_char;		 /* xon/xoff character             */
-  int			mcr;		 /* Modem control register         */
-  int                   msr;             /* Modem status register          */
-  int                   lsr;             /* Line status register           */
-  int			line;
-  int                   online;          /* 1 = B-Channel is up, drop data */
-					 /* 2 = B-Channel is up, deliver d.*/
-  int                   dialing;         /* Dial in progress or ATA        */
-  int                   closing;
-  int                   rcvsched;        /* Receive needs schedule         */
-  int                   isdn_driver;	 /* Index to isdn-driver           */
-  int                   isdn_channel;    /* Index to isdn-channel          */
-  int                   drv_index;       /* Index to dev->usage            */
-  int                   ncarrier;        /* Flag: schedule NO CARRIER      */
-  unsigned char         last_cause[8];   /* Last cause message             */
-  unsigned char         last_num[ISDN_MSNLEN];
-	                                 /* Last phone-number              */
-  unsigned char         last_l2;         /* Last layer-2 protocol          */
-  unsigned char         last_si;         /* Last service                   */
-  unsigned char         last_lhup;       /* Last hangup local?             */
-  unsigned char         last_dir;        /* Last direction (in or out)     */
-  struct timer_list     nc_timer;        /* Timer for delayed NO CARRIER   */
-  int                   send_outstanding;/* # of outstanding send-requests */
-  int                   xmit_size;       /* max. # of chars in xmit_buf    */
-  int                   xmit_count;      /* # of chars in xmit_buf         */
-  struct sk_buff_head   xmit_queue;      /* transmit queue                 */
-  atomic_t              xmit_lock;       /* Semaphore for isdn_tty_write   */
-#ifdef CONFIG_ISDN_AUDIO
-  int                   vonline;         /* Voice-channel status           */
-					 /* Bit 0 = recording              */
-					 /* Bit 1 = playback               */
-					 /* Bit 2 = playback, DLE-ETX seen */
-  struct sk_buff_head   dtmf_queue;      /* queue for dtmf results         */
-  void                  *adpcms;         /* state for adpcm decompression  */
-  void                  *adpcmr;         /* state for adpcm compression    */
-  void                  *dtmf_state;     /* state for dtmf decoder         */
-  void                  *silence_state;  /* state for silence detection    */
-#endif
-#ifdef CONFIG_ISDN_TTY_FAX
-  struct T30_s		*fax;		 /* T30 Fax Group 3 data/interface */
-  int			faxonline;	 /* Fax-channel status             */
-#endif
-  atemu                 emu;             /* AT-emulator data               */
-  spinlock_t	        readlock;
-} modem_info;
-
-#define ISDN_MODEM_WINSIZE 8
-
-/* Description of one ISDN-tty */
-typedef struct _isdn_modem {
-  int                refcount;				/* Number of opens        */
-  struct tty_driver  *tty_modem;			/* tty-device             */
-  struct tty_struct  *modem_table[ISDN_MAX_CHANNELS];	/* ?? copied from Orig    */
-  struct ktermios     *modem_termios[ISDN_MAX_CHANNELS];
-  struct ktermios     *modem_termios_locked[ISDN_MAX_CHANNELS];
-  modem_info         info[ISDN_MAX_CHANNELS];	   /* Private data           */
-} isdn_modem_t;
-
-/*======================= End of ISDN-tty stuff ============================*/
-
-/*======================== Start of V.110 stuff ============================*/
-#define V110_BUFSIZE 1024
-
-typedef struct {
-	int nbytes;                    /* 1 Matrixbyte -> nbytes in stream     */
-	int nbits;                     /* Number of used bits in streambyte    */
-	unsigned char key;             /* Bitmask in stream eg. 11 (nbits=2)   */
-	int decodelen;                 /* Amount of data in decodebuf          */
-	int SyncInit;                  /* Number of sync frames to send        */
-	unsigned char *OnlineFrame;    /* Precalculated V110 idle frame        */
-	unsigned char *OfflineFrame;   /* Precalculated V110 sync Frame        */
-	int framelen;                  /* Length of frames                     */
-	int skbuser;                   /* Number of unacked userdata skbs      */
-	int skbidle;                   /* Number of unacked idle/sync skbs     */
-	int introducer;                /* Local vars for decoder               */
-	int dbit;
-	unsigned char b;
-	int skbres;                    /* space to reserve in outgoing skb     */
-	int maxsize;                   /* maxbufsize of lowlevel driver        */
-	unsigned char *encodebuf;      /* temporary buffer for encoding        */
-	unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices     */
-} isdn_v110_stream;
-
-/*========================= End of V.110 stuff =============================*/
-
-/*======================= Start of general stuff ===========================*/
-
-typedef struct {
-	char *next;
-	char *private;
-} infostruct;
-
-#define DRV_FLAG_RUNNING 1
-#define DRV_FLAG_REJBUS  2
-#define DRV_FLAG_LOADED  4
-
-/* Description of hardware-level-driver */
-typedef struct _isdn_driver {
-	ulong               online;           /* Channel-Online flags             */
-	ulong               flags;            /* Misc driver Flags                */
-	int                 locks;            /* Number of locks for this driver  */
-	int                 channels;         /* Number of channels               */
-	wait_queue_head_t   st_waitq;         /* Wait-Queue for status-read's     */
-	int                 maxbufsize;       /* Maximum Buffersize supported     */
-	unsigned long       pktcount;         /* Until now: unused                */
-	int                 stavail;          /* Chars avail on Status-device     */
-	isdn_if            *interface;        /* Interface to driver              */
-	int                *rcverr;           /* Error-counters for B-Ch.-receive */
-	int                *rcvcount;         /* Byte-counters for B-Ch.-receive  */
-#ifdef CONFIG_ISDN_AUDIO
-	unsigned long      DLEflag;           /* Flags: Insert DLE at next read   */
-#endif
-	struct sk_buff_head *rpqueue;         /* Pointers to start of Rcv-Queue   */
-	wait_queue_head_t  *rcv_waitq;       /* Wait-Queues for B-Channel-Reads  */
-	wait_queue_head_t  *snd_waitq;       /* Wait-Queue for B-Channel-Send's  */
-	char               msn2eaz[10][ISDN_MSNLEN];  /* Mapping-Table MSN->EAZ   */
-} isdn_driver_t;
-
-/* Main driver-data */
-typedef struct isdn_devt {
-	struct module     *owner;
-	spinlock_t	  lock;
-	unsigned short    flags;		      /* Bitmapped Flags:           */
-	int               drivers;		      /* Current number of drivers  */
-	int               channels;		      /* Current number of channels */
-	int               net_verbose;                /* Verbose-Flag               */
-	int               modempoll;		      /* Flag: tty-read active      */
-	spinlock_t	  timerlock;
-	int               tflags;                     /* Timer-Flags:               */
-	/*  see ISDN_TIMER_..defines  */
-	int               global_flags;
-	infostruct        *infochain;                 /* List of open info-devs.    */
-	wait_queue_head_t info_waitq;                 /* Wait-Queue for isdninfo    */
-	struct timer_list timer;		      /* Misc.-function Timer       */
-	int               chanmap[ISDN_MAX_CHANNELS]; /* Map minor->device-channel  */
-	int               drvmap[ISDN_MAX_CHANNELS];  /* Map minor->driver-index    */
-	int               usage[ISDN_MAX_CHANNELS];   /* Used by tty/ip/voice       */
-	char              num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
-	/* Remote number of active ch.*/
-	int               m_idx[ISDN_MAX_CHANNELS];   /* Index for mdm....          */
-	isdn_driver_t     *drv[ISDN_MAX_DRIVERS];     /* Array of drivers           */
-	isdn_net_dev      *netdev;		      /* Linked list of net-if's    */
-	char              drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID                 */
-	struct task_struct *profd;                    /* For iprofd                 */
-	isdn_modem_t      mdm;			      /* tty-driver-data            */
-	isdn_net_dev      *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers     */
-	isdn_net_dev      *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers   */
-	ulong             ibytes[ISDN_MAX_CHANNELS];  /* Statistics incoming bytes  */
-	ulong             obytes[ISDN_MAX_CHANNELS];  /* Statistics outgoing bytes  */
-	int               v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */
-	atomic_t          v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */
-	isdn_v110_stream  *v110[ISDN_MAX_CHANNELS];   /* V.110 private data         */
-	struct mutex      mtx;                        /* serialize list access*/
-	unsigned long     global_features;
-} isdn_dev;
-
-extern isdn_dev *dev;
-
-
-#endif /* __ISDN_H__ */
diff --git a/include/linux/isdn/hdlc.h b/include/linux/isdn/hdlc.h
deleted file mode 100644
index fe2c1279c139..000000000000
--- a/include/linux/isdn/hdlc.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * hdlc.h  --  General purpose ISDN HDLC decoder.
- *
- * Implementation of a HDLC decoder/encoder in software.
- * Necessary because some ISDN devices don't have HDLC
- * controllers.
- *
- * Copyright (C)
- *	2009	Karsten Keil		<keil@b1-systems.de>
- *	2002	Wolfgang Mües		<wolfgang@iksw-muees.de>
- *	2001	Frode Isaksen		<fisaksen@bewan.com>
- *	2001	Kai Germaschewski	<kai.germaschewski@gmx.de>
- */
-
-#ifndef __ISDNHDLC_H__
-#define __ISDNHDLC_H__
-
-struct isdnhdlc_vars {
-	int bit_shift;
-	int hdlc_bits1;
-	int data_bits;
-	int ffbit_shift;	/* encoding only */
-	int state;
-	int dstpos;
-
-	u16 crc;
-
-	u8 cbin;
-	u8 shift_reg;
-	u8 ffvalue;
-
-	/* set if transferring data */
-	u32 data_received:1;
-	/* set if D channel (send idle instead of flags) */
-	u32 dchannel:1;
-	/* set if 56K adaptation */
-	u32 do_adapt56:1;
-	/* set if in closing phase (need to send CRC + flag) */
-	u32 do_closing:1;
-	/* set if data is bitreverse */
-	u32 do_bitreverse:1;
-};
-
-/* Feature Flags */
-#define HDLC_56KBIT	0x01
-#define HDLC_DCHANNEL	0x02
-#define HDLC_BITREVERSE	0x04
-
-/*
-  The return value from isdnhdlc_decode is
-  the frame length, 0 if no complete frame was decoded,
-  or a negative error number
-*/
-#define HDLC_FRAMING_ERROR     1
-#define HDLC_CRC_ERROR         2
-#define HDLC_LENGTH_ERROR      3
-
-extern void	isdnhdlc_rcv_init(struct isdnhdlc_vars *hdlc, u32 features);
-
-extern int	isdnhdlc_decode(struct isdnhdlc_vars *hdlc, const u8 *src,
-			int slen, int *count, u8 *dst, int dsize);
-
-extern void	isdnhdlc_out_init(struct isdnhdlc_vars *hdlc, u32 features);
-
-extern int	isdnhdlc_encode(struct isdnhdlc_vars *hdlc, const u8 *src,
-			u16 slen, int *count, u8 *dst, int dsize);
-
-#endif /* __ISDNHDLC_H__ */
diff --git a/include/linux/isdn_divertif.h b/include/linux/isdn_divertif.h
deleted file mode 100644
index 19ab361f9f07..000000000000
--- a/include/linux/isdn_divertif.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/* $Id: isdn_divertif.h,v 1.4.6.1 2001/09/23 22:25:05 kai Exp $
- *
- * Header for the diversion supplementary interface for i4l.
- *
- * Author    Werner Cornelius (werner@titro.de)
- * Copyright by Werner Cornelius (werner@titro.de)
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-#ifndef _LINUX_ISDN_DIVERTIF_H
-#define _LINUX_ISDN_DIVERTIF_H
-
-#include <linux/isdnif.h>
-#include <linux/types.h>
-#include <uapi/linux/isdn_divertif.h>
-
-/***************************************************************/
-/* structure exchanging data between isdn hl and divert module */
-/***************************************************************/ 
-typedef struct
-  { ulong if_magic; /* magic info and version */
-    int cmd; /* command */
-    int (*stat_callback)(isdn_ctrl *); /* supplied by divert module when calling */
-    int (*ll_cmd)(isdn_ctrl *); /* supplied by hl on return */
-    char * (*drv_to_name)(int); /* map a driver id to name, supplied by hl */
-    int (*name_to_drv)(char *); /* map a driver id to name, supplied by hl */
-  } isdn_divert_if;
-
-/*********************/
-/* function register */
-/*********************/
-extern int DIVERT_REG_NAME(isdn_divert_if *);
-#endif /* _LINUX_ISDN_DIVERTIF_H */
diff --git a/include/linux/isdn_ppp.h b/include/linux/isdn_ppp.h
deleted file mode 100644
index a0070c6dfaf8..000000000000
--- a/include/linux/isdn_ppp.h
+++ /dev/null
@@ -1,194 +0,0 @@
-/* Linux ISDN subsystem, sync PPP, interface to ipppd
- *
- * Copyright 1994-1999  by Fritz Elfert (fritz@isdn4linux.de)
- * Copyright 1995,96    Thinking Objects Software GmbH Wuerzburg
- * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
- * Copyright 2000-2002  by Kai Germaschewski (kai@germaschewski.name)
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-#ifndef _LINUX_ISDN_PPP_H
-#define _LINUX_ISDN_PPP_H
-
-
-
-
-#ifdef CONFIG_IPPP_FILTER
-#include <linux/filter.h>
-#endif
-#include <uapi/linux/isdn_ppp.h>
-
-#define DECOMP_ERR_NOMEM	(-10)
-
-#define MP_END_FRAG    0x40
-#define MP_BEGIN_FRAG  0x80
-
-#define MP_MAX_QUEUE_LEN	16
-
-/*
- * We need a way for the decompressor to influence the generation of CCP
- * Reset-Requests in a variety of ways. The decompressor is already returning
- * a lot of information (generated skb length, error conditions) so we use
- * another parameter. This parameter is a pointer to a structure which is
- * to be marked valid by the decompressor and only in this case is ever used.
- * Furthermore, the only case where this data is used is when the decom-
- * pressor returns DECOMP_ERROR.
- *
- * We use this same struct for the reset entry of the compressor to commu-
- * nicate to its caller how to deal with sending of a Reset Ack. In this
- * case, expra is not used, but other options still apply (suppressing
- * sending with rsend, appending arbitrary data, etc).
- */
-
-#define IPPP_RESET_MAXDATABYTES	32
-
-struct isdn_ppp_resetparams {
-  unsigned char valid:1;	/* rw Is this structure filled at all ? */
-  unsigned char rsend:1;	/* rw Should we send one at all ? */
-  unsigned char idval:1;	/* rw Is the id field valid ? */
-  unsigned char dtval:1;	/* rw Is the data field valid ? */
-  unsigned char expra:1;	/* rw Is an Ack expected for this Req ? */
-  unsigned char id;		/* wo Send CCP ResetReq with this id */
-  unsigned short maxdlen;	/* ro Max bytes to be stored in data field */
-  unsigned short dlen;		/* rw Bytes stored in data field */
-  unsigned char *data;		/* wo Data for ResetReq info field */
-};
-
-/*
- * this is an 'old friend' from ppp-comp.h under a new name 
- * check the original include for more information
- */
-struct isdn_ppp_compressor {
-  struct isdn_ppp_compressor *next, *prev;
-  struct module *owner;
-  int num; /* CCP compression protocol number */
-  
-  void *(*alloc) (struct isdn_ppp_comp_data *);
-  void (*free) (void *state);
-  int  (*init) (void *state, struct isdn_ppp_comp_data *,
-		int unit,int debug);
-  
-  /* The reset entry needs to get more exact information about the
-     ResetReq or ResetAck it was called with. The parameters are
-     obvious. If reset is called without a Req or Ack frame which
-     could be handed into it, code MUST be set to 0. Using rsparm,
-     the reset entry can control if and how a ResetAck is returned. */
-  
-  void (*reset) (void *state, unsigned char code, unsigned char id,
-		 unsigned char *data, unsigned len,
-		 struct isdn_ppp_resetparams *rsparm);
-  
-  int  (*compress) (void *state, struct sk_buff *in,
-		    struct sk_buff *skb_out, int proto);
-  
-	int  (*decompress) (void *state,struct sk_buff *in,
-			    struct sk_buff *skb_out,
-			    struct isdn_ppp_resetparams *rsparm);
-  
-  void (*incomp) (void *state, struct sk_buff *in,int proto);
-  void (*stat) (void *state, struct compstat *stats);
-};
-
-extern int isdn_ppp_register_compressor(struct isdn_ppp_compressor *);
-extern int isdn_ppp_unregister_compressor(struct isdn_ppp_compressor *);
-extern int isdn_ppp_dial_slave(char *);
-extern int isdn_ppp_hangup_slave(char *);
-
-typedef struct {
-  unsigned long seqerrs;
-  unsigned long frame_drops;
-  unsigned long overflows;
-  unsigned long max_queue_len;
-} isdn_mppp_stats;
-
-typedef struct {
-  int mp_mrru;                        /* unused                             */
-  struct sk_buff * frags;	/* fragments sl list -- use skb->next */
-  long frames;			/* number of frames in the frame list */
-  unsigned int seq;		/* last processed packet seq #: any packets
-  				 * with smaller seq # will be dropped
-				 * unconditionally */
-  spinlock_t lock;
-  int ref_ct;				 
-  /* statistics */
-  isdn_mppp_stats stats;
-} ippp_bundle;
-
-#define NUM_RCV_BUFFS     64
-
-struct ippp_buf_queue {
-  struct ippp_buf_queue *next;
-  struct ippp_buf_queue *last;
-  char *buf;                 /* NULL here indicates end of queue */
-  int len;
-};
-
-/* The data structure for one CCP reset transaction */
-enum ippp_ccp_reset_states {
-  CCPResetIdle,
-  CCPResetSentReq,
-  CCPResetRcvdReq,
-  CCPResetSentAck,
-  CCPResetRcvdAck
-};
-
-struct ippp_ccp_reset_state {
-  enum ippp_ccp_reset_states state;	/* State of this transaction */
-  struct ippp_struct *is;		/* Backlink to device stuff */
-  unsigned char id;			/* Backlink id index */
-  unsigned char ta:1;			/* The timer is active (flag) */
-  unsigned char expra:1;		/* We expect a ResetAck at all */
-  int dlen;				/* Databytes stored in data */
-  struct timer_list timer;		/* For timeouts/retries */
-  /* This is a hack but seems sufficient for the moment. We do not want
-     to have this be yet another allocation for some bytes, it is more
-     memory management overhead than the whole mess is worth. */
-  unsigned char data[IPPP_RESET_MAXDATABYTES];
-};
-
-/* The data structure keeping track of the currently outstanding CCP Reset
-   transactions. */
-struct ippp_ccp_reset {
-  struct ippp_ccp_reset_state *rs[256];	/* One per possible id */
-  unsigned char lastid;			/* Last id allocated by the engine */
-};
-
-struct ippp_struct {
-  struct ippp_struct *next_link;
-  int state;
-  spinlock_t buflock;
-  struct ippp_buf_queue rq[NUM_RCV_BUFFS]; /* packet queue for isdn_ppp_read() */
-  struct ippp_buf_queue *first;  /* pointer to (current) first packet */
-  struct ippp_buf_queue *last;   /* pointer to (current) last used packet in queue */
-  wait_queue_head_t wq;
-  struct task_struct *tk;
-  unsigned int mpppcfg;
-  unsigned int pppcfg;
-  unsigned int mru;
-  unsigned int mpmru;
-  unsigned int mpmtu;
-  unsigned int maxcid;
-  struct isdn_net_local_s *lp;
-  int unit;
-  int minor;
-  unsigned int last_link_seqno;
-  long mp_seqno;
-#ifdef CONFIG_ISDN_PPP_VJ
-  unsigned char *cbuf;
-  struct slcompress *slcomp;
-#endif
-#ifdef CONFIG_IPPP_FILTER
-  struct bpf_prog *pass_filter;   /* filter for packets to pass */
-  struct bpf_prog *active_filter; /* filter for pkts to reset idle */
-#endif
-  unsigned long debug;
-  struct isdn_ppp_compressor *compressor,*decompressor;
-  struct isdn_ppp_compressor *link_compressor,*link_decompressor;
-  void *decomp_stat,*comp_stat,*link_decomp_stat,*link_comp_stat;
-  struct ippp_ccp_reset *reset;	/* Allocated on demand, may never be needed */
-  unsigned long compflags;
-};
-
-#endif /* _LINUX_ISDN_PPP_H */
diff --git a/include/linux/isdnif.h b/include/linux/isdnif.h
deleted file mode 100644
index 8d80fdc68647..000000000000
--- a/include/linux/isdnif.h
+++ /dev/null
@@ -1,505 +0,0 @@
-/* $Id: isdnif.h,v 1.43.2.2 2004/01/12 23:08:35 keil Exp $
- *
- * Linux ISDN subsystem
- * Definition of the interface between the subsystem and its low-level drivers.
- *
- * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
- * Copyright 1995,96    Thinking Objects Software GmbH Wuerzburg
- * 
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-#ifndef __ISDNIF_H__
-#define __ISDNIF_H__
-
-
-#include <linux/skbuff.h>
-#include <uapi/linux/isdnif.h>
-
-/***************************************************************************/
-/* Extensions made by Werner Cornelius (werner@ikt.de)                     */
-/*                                                                         */ 
-/* The proceed command holds a incoming call in a state to leave processes */
-/* enough time to check whether ist should be accepted.                    */
-/* The PROT_IO Command extends the interface to make protocol dependent    */
-/* features available (call diversion, call waiting...).                   */
-/*                                                                         */ 
-/* The PROT_IO Command is executed with the desired driver id and the arg  */
-/* parameter coded as follows:                                             */
-/* The lower 8 bits of arg contain the desired protocol from ISDN_PTYPE    */
-/* definitions. The upper 24 bits represent the protocol specific cmd/stat.*/
-/* Any additional data is protocol and command specific.                   */
-/* This mechanism also applies to the statcallb callback STAT_PROT.        */    
-/*                                                                         */
-/* This suggested extension permits an easy expansion of protocol specific */
-/* handling. Extensions may be added at any time without changing the HL   */
-/* driver code and not getting conflicts without certifications.           */
-/* The well known CAPI 2.0 interface handles such extensions in a similar  */
-/* way. Perhaps a protocol specific module may be added and separately     */
-/* loaded and linked to the basic isdn module for handling.                */                    
-/***************************************************************************/
-
-/*****************/
-/* DSS1 commands */ 
-/*****************/
-#define DSS1_CMD_INVOKE       ((0x00 << 8) | ISDN_PTYPE_EURO)   /* invoke a supplementary service */
-#define DSS1_CMD_INVOKE_ABORT ((0x01 << 8) | ISDN_PTYPE_EURO)   /* abort a invoke cmd */
-
-/*******************************/
-/* DSS1 Status callback values */
-/*******************************/
-#define DSS1_STAT_INVOKE_RES  ((0x80 << 8) | ISDN_PTYPE_EURO)   /* Result for invocation */
-#define DSS1_STAT_INVOKE_ERR  ((0x81 << 8) | ISDN_PTYPE_EURO)   /* Error Return for invocation */
-#define DSS1_STAT_INVOKE_BRD  ((0x82 << 8) | ISDN_PTYPE_EURO)   /* Deliver invoke broadcast info */
-
-
-/*********************************************************************/
-/* structures for DSS1 commands and callback                         */
-/*                                                                   */
-/* An action is invoked by sending a DSS1_CMD_INVOKE. The ll_id, proc*/
-/* timeout, datalen and data fields must be set before calling.      */
-/*                                                                   */
-/* The return value is a positive hl_id value also delivered in the  */
-/* hl_id field. A value of zero signals no more left hl_id capacitys.*/
-/* A negative return value signals errors in LL. So if the return    */
-/* value is <= 0 no action in LL will be taken -> request ignored    */
-/*                                                                   */
-/* The timeout field must be filled with a positive value specifying */
-/* the amount of time the INVOKED process waits for a reaction from  */
-/* the network.                                                      */
-/* If a response (either error or result) is received during this    */
-/* intervall, a reporting callback is initiated and the process will */
-/* be deleted, the hl identifier will be freed.                      */
-/* If no response is received during the specified intervall, a error*/
-/* callback is initiated with timeout set to -1 and a datalen set    */
-/* to 0.                                                             */
-/* If timeout is set to a value <= 0 during INVOCATION the process is*/
-/* immediately deleted after sending the data. No callback occurs !  */
-/*                                                                   */
-/* A currently waiting process may be aborted with INVOKE_ABORT. No  */
-/* callback will occur when a process has been aborted.              */
-/*                                                                   */
-/* Broadcast invoke frames from the network are reported via the     */
-/* STAT_INVOKE_BRD callback. The ll_id is set to 0, the other fields */
-/* are supplied by the network and not by the HL.                    */   
-/*********************************************************************/
-
-/*****************/
-/* NI1 commands */ 
-/*****************/
-#define NI1_CMD_INVOKE       ((0x00 << 8) | ISDN_PTYPE_NI1)   /* invoke a supplementary service */
-#define NI1_CMD_INVOKE_ABORT ((0x01 << 8) | ISDN_PTYPE_NI1)   /* abort a invoke cmd */
-
-/*******************************/
-/* NI1 Status callback values */
-/*******************************/
-#define NI1_STAT_INVOKE_RES  ((0x80 << 8) | ISDN_PTYPE_NI1)   /* Result for invocation */
-#define NI1_STAT_INVOKE_ERR  ((0x81 << 8) | ISDN_PTYPE_NI1)   /* Error Return for invocation */
-#define NI1_STAT_INVOKE_BRD  ((0x82 << 8) | ISDN_PTYPE_NI1)   /* Deliver invoke broadcast info */
-
-typedef struct
-  { ulong ll_id; /* ID supplied by LL when executing    */
-		 /* a command and returned by HL for    */
-                 /* INVOKE_RES and INVOKE_ERR           */
-    int hl_id;   /* ID supplied by HL when called       */
-                 /* for executing a cmd and delivered   */
-                 /* for results and errors              */
-                 /* must be supplied by LL when aborting*/  
-    int proc;    /* invoke procedure used by CMD_INVOKE */
-                 /* returned by callback and broadcast  */ 
-    int timeout; /* timeout for INVOKE CMD in ms        */
-                 /* -1  in stat callback when timed out */
-                 /* error value when error callback     */
-    int datalen; /* length of cmd or stat data          */
-    u_char *data;/* pointer to data delivered or send   */
-  } isdn_cmd_stat;
-
-/*
- * Commands from linklevel to lowlevel
- *
- */
-#define ISDN_CMD_IOCTL    0       /* Perform ioctl                         */
-#define ISDN_CMD_DIAL     1       /* Dial out                              */
-#define ISDN_CMD_ACCEPTD  2       /* Accept an incoming call on D-Chan.    */
-#define ISDN_CMD_ACCEPTB  3       /* Request B-Channel connect.            */
-#define ISDN_CMD_HANGUP   4       /* Hangup                                */
-#define ISDN_CMD_CLREAZ   5       /* Clear EAZ(s) of channel               */
-#define ISDN_CMD_SETEAZ   6       /* Set EAZ(s) of channel                 */
-#define ISDN_CMD_GETEAZ   7       /* Get EAZ(s) of channel                 */
-#define ISDN_CMD_SETSIL   8       /* Set Service-Indicator-List of channel */
-#define ISDN_CMD_GETSIL   9       /* Get Service-Indicator-List of channel */
-#define ISDN_CMD_SETL2   10       /* Set B-Chan. Layer2-Parameter          */
-#define ISDN_CMD_GETL2   11       /* Get B-Chan. Layer2-Parameter          */
-#define ISDN_CMD_SETL3   12       /* Set B-Chan. Layer3-Parameter          */
-#define ISDN_CMD_GETL3   13       /* Get B-Chan. Layer3-Parameter          */
-// #define ISDN_CMD_LOCK    14       /* Signal usage by upper levels          */
-// #define ISDN_CMD_UNLOCK  15       /* Release usage-lock                    */
-#define ISDN_CMD_SUSPEND 16       /* Suspend connection                    */
-#define ISDN_CMD_RESUME  17       /* Resume connection                     */
-#define ISDN_CMD_PROCEED 18       /* Proceed with call establishment       */
-#define ISDN_CMD_ALERT   19       /* Alert after Proceeding                */
-#define ISDN_CMD_REDIR   20       /* Redir a incoming call                 */
-#define ISDN_CMD_PROT_IO 21       /* Protocol specific commands            */
-#define CAPI_PUT_MESSAGE 22       /* CAPI message send down or up          */
-#define ISDN_CMD_FAXCMD  23       /* FAX commands to HL-driver             */
-#define ISDN_CMD_AUDIO   24       /* DSP, DTMF, ... settings               */
-
-/*
- * Status-Values delivered from lowlevel to linklevel via
- * statcallb().
- *
- */
-#define ISDN_STAT_STAVAIL 256    /* Raw status-data available             */
-#define ISDN_STAT_ICALL   257    /* Incoming call detected                */
-#define ISDN_STAT_RUN     258    /* Signal protocol-code is running       */
-#define ISDN_STAT_STOP    259    /* Signal halt of protocol-code          */
-#define ISDN_STAT_DCONN   260    /* Signal D-Channel connect              */
-#define ISDN_STAT_BCONN   261    /* Signal B-Channel connect              */
-#define ISDN_STAT_DHUP    262    /* Signal D-Channel disconnect           */
-#define ISDN_STAT_BHUP    263    /* Signal B-Channel disconnect           */
-#define ISDN_STAT_CINF    264    /* Charge-Info                           */
-#define ISDN_STAT_LOAD    265    /* Signal new lowlevel-driver is loaded  */
-#define ISDN_STAT_UNLOAD  266    /* Signal unload of lowlevel-driver      */
-#define ISDN_STAT_BSENT   267    /* Signal packet sent                    */
-#define ISDN_STAT_NODCH   268    /* Signal no D-Channel                   */
-#define ISDN_STAT_ADDCH   269    /* Add more Channels                     */
-#define ISDN_STAT_CAUSE   270    /* Cause-Message                         */
-#define ISDN_STAT_ICALLW  271    /* Incoming call without B-chan waiting  */
-#define ISDN_STAT_REDIR   272    /* Redir result                          */
-#define ISDN_STAT_PROT    273    /* protocol IO specific callback         */
-#define ISDN_STAT_DISPLAY 274    /* deliver a received display message    */
-#define ISDN_STAT_L1ERR   275    /* Signal Layer-1 Error                  */
-#define ISDN_STAT_FAXIND  276    /* FAX indications from HL-driver        */
-#define ISDN_STAT_AUDIO   277    /* DTMF, DSP indications                 */
-#define ISDN_STAT_DISCH   278    /* Disable/Enable channel usage          */
-
-/*
- * Audio commands
- */
-#define ISDN_AUDIO_SETDD	0	/* Set DTMF detection           */
-#define ISDN_AUDIO_DTMF		1	/* Rx/Tx DTMF                   */
-
-/*
- * Values for errcode field
- */
-#define ISDN_STAT_L1ERR_SEND 1
-#define ISDN_STAT_L1ERR_RECV 2
-
-/*
- * Values for feature-field of interface-struct.
- */
-/* Layer 2 */
-#define ISDN_FEATURE_L2_X75I    (0x0001 << ISDN_PROTO_L2_X75I)
-#define ISDN_FEATURE_L2_X75UI   (0x0001 << ISDN_PROTO_L2_X75UI)
-#define ISDN_FEATURE_L2_X75BUI  (0x0001 << ISDN_PROTO_L2_X75BUI)
-#define ISDN_FEATURE_L2_HDLC    (0x0001 << ISDN_PROTO_L2_HDLC)
-#define ISDN_FEATURE_L2_TRANS   (0x0001 << ISDN_PROTO_L2_TRANS)
-#define ISDN_FEATURE_L2_X25DTE  (0x0001 << ISDN_PROTO_L2_X25DTE)
-#define ISDN_FEATURE_L2_X25DCE  (0x0001 << ISDN_PROTO_L2_X25DCE)
-#define ISDN_FEATURE_L2_V11096  (0x0001 << ISDN_PROTO_L2_V11096)
-#define ISDN_FEATURE_L2_V11019  (0x0001 << ISDN_PROTO_L2_V11019)
-#define ISDN_FEATURE_L2_V11038  (0x0001 << ISDN_PROTO_L2_V11038)
-#define ISDN_FEATURE_L2_MODEM   (0x0001 << ISDN_PROTO_L2_MODEM)
-#define ISDN_FEATURE_L2_FAX	(0x0001 << ISDN_PROTO_L2_FAX)
-#define ISDN_FEATURE_L2_HDLC_56K (0x0001 << ISDN_PROTO_L2_HDLC_56K)
-
-#define ISDN_FEATURE_L2_MASK    (0x0FFFF) /* Max. 16 protocols */
-#define ISDN_FEATURE_L2_SHIFT   (0)
-
-/* Layer 3 */
-#define ISDN_FEATURE_L3_TRANS   (0x10000 << ISDN_PROTO_L3_TRANS)
-#define ISDN_FEATURE_L3_TRANSDSP (0x10000 << ISDN_PROTO_L3_TRANSDSP)
-#define ISDN_FEATURE_L3_FCLASS2	(0x10000 << ISDN_PROTO_L3_FCLASS2)
-#define ISDN_FEATURE_L3_FCLASS1	(0x10000 << ISDN_PROTO_L3_FCLASS1)
-
-#define ISDN_FEATURE_L3_MASK    (0x0FF0000) /* Max. 8 Protocols */
-#define ISDN_FEATURE_L3_SHIFT   (16)
-
-/* Signaling */
-#define ISDN_FEATURE_P_UNKNOWN  (0x1000000 << ISDN_PTYPE_UNKNOWN)
-#define ISDN_FEATURE_P_1TR6     (0x1000000 << ISDN_PTYPE_1TR6)
-#define ISDN_FEATURE_P_EURO     (0x1000000 << ISDN_PTYPE_EURO)
-#define ISDN_FEATURE_P_NI1      (0x1000000 << ISDN_PTYPE_NI1)
-
-#define ISDN_FEATURE_P_MASK     (0x0FF000000) /* Max. 8 Protocols */
-#define ISDN_FEATURE_P_SHIFT    (24)
-
-typedef struct setup_parm {
-    unsigned char phone[32];	/* Remote Phone-Number */
-    unsigned char eazmsn[32];	/* Local EAZ or MSN    */
-    unsigned char si1;      /* Service Indicator 1 */
-    unsigned char si2;      /* Service Indicator 2 */
-    unsigned char plan;     /* Numbering plan      */
-    unsigned char screen;   /* Screening info      */
-} setup_parm;
-
-
-#ifdef CONFIG_ISDN_TTY_FAX
-/* T.30 Fax G3 */
-
-#define FAXIDLEN 21
-
-typedef struct T30_s {
-	/* session parameters */
-	__u8 resolution;
-	__u8 rate;
-	__u8 width;
-	__u8 length;
-	__u8 compression;
-	__u8 ecm;
-	__u8 binary;
-	__u8 scantime;
-	__u8 id[FAXIDLEN];
-	/* additional parameters */
-	__u8 phase;
-	__u8 direction;
-	__u8 code;
-	__u8 badlin;
-	__u8 badmul;
-	__u8 bor;
-	__u8 fet;
-	__u8 pollid[FAXIDLEN];
-	__u8 cq;
-	__u8 cr;
-	__u8 ctcrty;
-	__u8 minsp;
-	__u8 phcto;
-	__u8 rel;
-	__u8 nbc;
-	/* remote station parameters */
-	__u8 r_resolution;
-	__u8 r_rate;
-	__u8 r_width;
-	__u8 r_length;
-	__u8 r_compression;
-	__u8 r_ecm;
-	__u8 r_binary;
-	__u8 r_scantime;
-	__u8 r_id[FAXIDLEN];
-	__u8 r_code;
-} __packed T30_s;
-
-#define ISDN_TTY_FAX_CONN_IN	0
-#define ISDN_TTY_FAX_CONN_OUT	1
-
-#define ISDN_TTY_FAX_FCON	0
-#define ISDN_TTY_FAX_DIS 	1
-#define ISDN_TTY_FAX_FTT 	2
-#define ISDN_TTY_FAX_MCF 	3
-#define ISDN_TTY_FAX_DCS 	4
-#define ISDN_TTY_FAX_TRAIN_OK	5
-#define ISDN_TTY_FAX_EOP 	6
-#define ISDN_TTY_FAX_EOM 	7
-#define ISDN_TTY_FAX_MPS 	8
-#define ISDN_TTY_FAX_DTC 	9
-#define ISDN_TTY_FAX_RID 	10
-#define ISDN_TTY_FAX_HNG 	11
-#define ISDN_TTY_FAX_DT  	12
-#define ISDN_TTY_FAX_FCON_I	13
-#define ISDN_TTY_FAX_DR  	14
-#define ISDN_TTY_FAX_ET  	15
-#define ISDN_TTY_FAX_CFR 	16
-#define ISDN_TTY_FAX_PTS 	17
-#define ISDN_TTY_FAX_SENT	18
-
-#define ISDN_FAX_PHASE_IDLE	0
-#define ISDN_FAX_PHASE_A	1
-#define ISDN_FAX_PHASE_B   	2
-#define ISDN_FAX_PHASE_C   	3
-#define ISDN_FAX_PHASE_D   	4
-#define ISDN_FAX_PHASE_E   	5
-
-#endif /* TTY_FAX */
-
-#define ISDN_FAX_CLASS1_FAE	0
-#define ISDN_FAX_CLASS1_FTS	1
-#define ISDN_FAX_CLASS1_FRS	2
-#define ISDN_FAX_CLASS1_FTM	3
-#define ISDN_FAX_CLASS1_FRM	4
-#define ISDN_FAX_CLASS1_FTH	5
-#define ISDN_FAX_CLASS1_FRH	6
-#define ISDN_FAX_CLASS1_CTRL	7
-
-#define ISDN_FAX_CLASS1_OK	0
-#define ISDN_FAX_CLASS1_CONNECT	1
-#define ISDN_FAX_CLASS1_NOCARR	2
-#define ISDN_FAX_CLASS1_ERROR	3
-#define ISDN_FAX_CLASS1_FCERROR	4
-#define ISDN_FAX_CLASS1_QUERY	5
-
-typedef struct {
-	__u8	cmd;
-	__u8	subcmd;
-	__u8	para[50];
-} aux_s;
-
-#define AT_COMMAND	0
-#define AT_EQ_VALUE	1
-#define AT_QUERY	2
-#define AT_EQ_QUERY	3
-
-/* CAPI structs */
-
-/* this is compatible to the old union size */
-#define MAX_CAPI_PARA_LEN 50
-
-typedef struct {
-	/* Header */
-	__u16 Length;
-	__u16 ApplId;
-	__u8 Command;
-	__u8 Subcommand;
-	__u16 Messagenumber;
-
-	/* Parameter */
-	union {
-		__u32 Controller;
-		__u32 PLCI;
-		__u32 NCCI;
-	} adr;
-	__u8 para[MAX_CAPI_PARA_LEN];
-} capi_msg;
-
-/*
- * Structure for exchanging above infos
- *
- */
-typedef struct {
-	int   driver;		/* Lowlevel-Driver-ID            */
-	int   command;		/* Command or Status (see above) */
-	ulong arg;		/* Additional Data               */
-	union {
-		ulong errcode;	/* Type of error with STAT_L1ERR	*/
-		int length;	/* Amount of bytes sent with STAT_BSENT	*/
-		u_char num[50];	/* Additional Data			*/
-		setup_parm setup;/* For SETUP msg			*/
-		capi_msg cmsg;	/* For CAPI like messages		*/
-		char display[85];/* display message data		*/ 
-		isdn_cmd_stat isdn_io; /* ISDN IO-parameter/result	*/
-		aux_s aux;	/* for modem commands/indications	*/
-#ifdef CONFIG_ISDN_TTY_FAX
-		T30_s	*fax;	/* Pointer to ttys fax struct		*/
-#endif
-		ulong userdata;	/* User Data */
-	} parm;
-} isdn_ctrl;
-
-#define dss1_io    isdn_io
-#define ni1_io     isdn_io
-
-/*
- * The interface-struct itself (initialized at load-time of lowlevel-driver)
- *
- * See Documentation/isdn/INTERFACE for a description, how the communication
- * between the ISDN subsystem and its drivers is done.
- *
- */
-typedef struct {
-  struct module *owner;
-
-  /* Number of channels supported by this driver
-   */
-  int channels;
-
-  /* 
-   * Maximum Size of transmit/receive-buffer this driver supports.
-   */
-  int maxbufsize;
-
-  /* Feature-Flags for this driver.
-   * See defines ISDN_FEATURE_... for Values
-   */
-  unsigned long features;
-
-  /*
-   * Needed for calculating
-   * dev->hard_header_len = linklayer header + hl_hdrlen;
-   * Drivers, not supporting sk_buff's should set this to 0.
-   */
-  unsigned short hl_hdrlen;
-
-  /*
-   * Receive-Callback using sk_buff's
-   * Parameters:
-   *             int                    Driver-ID
-   *             int                    local channel-number (0 ...)
-   *             struct sk_buff *skb    received Data
-   */
-  void (*rcvcallb_skb)(int, int, struct sk_buff *);
-
-  /* Status-Callback
-   * Parameters:
-   *             isdn_ctrl*
-   *                   driver  = Driver ID.
-   *                   command = One of above ISDN_STAT_... constants.
-   *                   arg     = depending on status-type.
-   *                   num     = depending on status-type.
-   */
-  int (*statcallb)(isdn_ctrl*);
-
-  /* Send command
-   * Parameters:
-   *             isdn_ctrl*
-   *                   driver  = Driver ID.
-   *                   command = One of above ISDN_CMD_... constants.
-   *                   arg     = depending on command.
-   *                   num     = depending on command.
-   */
-  int (*command)(isdn_ctrl*);
-
-  /*
-   * Send data using sk_buff's
-   * Parameters:
-   *             int                    driverId
-   *             int                    local channel-number (0...)
-   *             int                    Flag: Need ACK for this packet.
-   *             struct sk_buff *skb    Data to send
-   */
-  int (*writebuf_skb) (int, int, int, struct sk_buff *);
-
-  /* Send raw D-Channel-Commands
-   * Parameters:
-   *             u_char pointer data
-   *             int    length of data
-   *             int    driverId
-   *             int    local channel-number (0 ...)
-   */
-  int (*writecmd)(const u_char __user *, int, int, int);
-
-  /* Read raw Status replies
-   *             u_char pointer data (volatile)
-   *             int    length of buffer
-   *             int    driverId
-   *             int    local channel-number (0 ...)
-   */
-  int (*readstat)(u_char __user *, int, int, int);
-
-  char id[20];
-} isdn_if;
-
-/*
- * Function which must be called by lowlevel-driver at loadtime with
- * the following fields of above struct set:
- *
- * channels     Number of channels that will be supported.
- * hl_hdrlen    Space to preserve in sk_buff's when sending. Drivers, not
- *              supporting sk_buff's should set this to 0.
- * command      Address of Command-Handler.
- * features     Bitwise coded Features of this driver. (use ISDN_FEATURE_...)
- * writebuf_skb Address of Skbuff-Send-Handler.
- * writecmd        "    "  D-Channel  " which accepts raw D-Ch-Commands.
- * readstat        "    "  D-Channel  " which delivers raw Status-Data.
- *
- * The linklevel-driver fills the following fields:
- *
- * channels      Driver-ID assigned to this driver. (Must be used on all
- *               subsequent callbacks.
- * rcvcallb_skb  Address of handler for received Skbuff's.
- * statcallb        "    "     "    for status-changes.
- *
- */
-extern int register_isdn(isdn_if*);
-#include <linux/uaccess.h>
-
-#endif /* __ISDNIF_H__ */
diff --git a/include/linux/wanrouter.h b/include/linux/wanrouter.h
deleted file mode 100644
index f6358558f9f5..000000000000
--- a/include/linux/wanrouter.h
+++ /dev/null
@@ -1,11 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * wanrouter.h	Legacy declarations kept around until X25 is removed
- */
-
-#ifndef	_ROUTER_H
-#define	_ROUTER_H
-
-#include <uapi/linux/wanrouter.h>
-
-#endif	/* _ROUTER_H */