isdn: remove isdn4linux

With all isdn4linux hardware drivers gone, this is only a wrapper around
CAPI to support old user space. However, from looking at the mailing
list, it seems that the last time anyone asked about it was in 2014,
when the upgrade from a linux-2.4 installation failed, and mISDN was
suggested as a replacement.

The largest public ISDN network (Deutsche Telekom) was supposed to be
shut down 2018, which must have drastically reduced the number of legacy
installations.

When we last discussed removing i4l in 2016, Karsten Keil suggested
revisiting this in 2018. I guess this is overdue.

Link: http://listserv.isdn4linux.de/pipermail/isdn4linux/2014-October/006165.html
Link: https://patchwork.kernel.org/patch/8484861/#17900371
Link: https://listserv.isdn4linux.de/pipermail/isdn4linux/2019-April/thread.html
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 151 deletions

diff --git a/drivers/isdn/i4l/isdn_net.h b/drivers/isdn/i4l/isdn_net.h
deleted file mode 100644
index cca6d68da171..000000000000
--- a/drivers/isdn/i4l/isdn_net.h
+++ /dev/null
@@ -1,151 +0,0 @@
-/* $Id: isdn_net.h,v 1.1.2.2 2004/01/12 22:37:19 keil Exp $
- *
- * header for Linux ISDN subsystem, network related functions (linklevel).
- *
- * Copyright 1994-1999  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.
- *
- */
-
-/* Definitions for hupflags:                */
-#define ISDN_WAITCHARGE  1      /* did not get a charge info yet            */
-#define ISDN_HAVECHARGE  2      /* We know a charge info                    */
-#define ISDN_CHARGEHUP   4      /* We want to use the charge mechanism      */
-#define ISDN_INHUP       8      /* Even if incoming, close after huptimeout */
-#define ISDN_MANCHARGE  16      /* Charge Interval manually set             */
-
-/*
- * Definitions for Cisco-HDLC header.
- */
-
-#define CISCO_ADDR_UNICAST    0x0f
-#define CISCO_ADDR_BROADCAST  0x8f
-#define CISCO_CTRL            0x00
-#define CISCO_TYPE_CDP        0x2000
-#define CISCO_TYPE_SLARP      0x8035
-#define CISCO_SLARP_REQUEST   0
-#define CISCO_SLARP_REPLY     1
-#define CISCO_SLARP_KEEPALIVE 2
-
-extern char *isdn_net_new(char *, struct net_device *);
-extern char *isdn_net_newslave(char *);
-extern int isdn_net_rm(char *);
-extern int isdn_net_rmall(void);
-extern int isdn_net_stat_callback(int, isdn_ctrl *);
-extern int isdn_net_setcfg(isdn_net_ioctl_cfg *);
-extern int isdn_net_getcfg(isdn_net_ioctl_cfg *);
-extern int isdn_net_addphone(isdn_net_ioctl_phone *);
-extern int isdn_net_getphones(isdn_net_ioctl_phone *, char __user *);
-extern int isdn_net_getpeer(isdn_net_ioctl_phone *, isdn_net_ioctl_phone __user *);
-extern int isdn_net_delphone(isdn_net_ioctl_phone *);
-extern int isdn_net_find_icall(int, int, int, setup_parm *);
-extern void isdn_net_hangup(struct net_device *);
-extern void isdn_net_dial(void);
-extern void isdn_net_autohup(void);
-extern int isdn_net_force_hangup(char *);
-extern int isdn_net_force_dial(char *);
-extern isdn_net_dev *isdn_net_findif(char *);
-extern int isdn_net_rcv_skb(int, struct sk_buff *);
-extern int isdn_net_dial_req(isdn_net_local *);
-extern void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb);
-extern void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb);
-
-#define ISDN_NET_MAX_QUEUE_LENGTH 2
-
-#define ISDN_MASTER_PRIV(lp) ((isdn_net_local *) netdev_priv(lp->master))
-#define ISDN_SLAVE_PRIV(lp) ((isdn_net_local *) netdev_priv(lp->slave))
-#define MASTER_TO_SLAVE(master)					\
-	(((isdn_net_local *) netdev_priv(master))->slave)
-
-/*
- * is this particular channel busy?
- */
-static __inline__ int isdn_net_lp_busy(isdn_net_local *lp)
-{
-	if (atomic_read(&lp->frame_cnt) < ISDN_NET_MAX_QUEUE_LENGTH)
-		return 0;
-	else
-		return 1;
-}
-
-/*
- * For the given net device, this will get a non-busy channel out of the
- * corresponding bundle. The returned channel is locked.
- */
-static __inline__ isdn_net_local *isdn_net_get_locked_lp(isdn_net_dev *nd)
-{
-	unsigned long flags;
-	isdn_net_local *lp;
-
-	spin_lock_irqsave(&nd->queue_lock, flags);
-	lp = nd->queue;         /* get lp on top of queue */
-	while (isdn_net_lp_busy(nd->queue)) {
-		nd->queue = nd->queue->next;
-		if (nd->queue == lp) { /* not found -- should never happen */
-			lp = NULL;
-			goto errout;
-		}
-	}
-	lp = nd->queue;
-	nd->queue = nd->queue->next;
-	spin_unlock_irqrestore(&nd->queue_lock, flags);
-	spin_lock(&lp->xmit_lock);
-	local_bh_disable();
-	return lp;
-errout:
-	spin_unlock_irqrestore(&nd->queue_lock, flags);
-	return lp;
-}
-
-/*
- * add a channel to a bundle
- */
-static __inline__ void isdn_net_add_to_bundle(isdn_net_dev *nd, isdn_net_local *nlp)
-{
-	isdn_net_local *lp;
-	unsigned long flags;
-
-	spin_lock_irqsave(&nd->queue_lock, flags);
-
-	lp = nd->queue;
-//	printk(KERN_DEBUG "%s: lp:%s(%p) nlp:%s(%p) last(%p)\n",
-//		__func__, lp->name, lp, nlp->name, nlp, lp->last);
-	nlp->last = lp->last;
-	lp->last->next = nlp;
-	lp->last = nlp;
-	nlp->next = lp;
-	nd->queue = nlp;
-
-	spin_unlock_irqrestore(&nd->queue_lock, flags);
-}
-/*
- * remove a channel from the bundle it belongs to
- */
-static __inline__ void isdn_net_rm_from_bundle(isdn_net_local *lp)
-{
-	isdn_net_local *master_lp = lp;
-	unsigned long flags;
-
-	if (lp->master)
-		master_lp = ISDN_MASTER_PRIV(lp);
-
-//	printk(KERN_DEBUG "%s: lp:%s(%p) mlp:%s(%p) last(%p) next(%p) mndq(%p)\n",
-//		__func__, lp->name, lp, master_lp->name, master_lp, lp->last, lp->next, master_lp->netdev->queue);
-	spin_lock_irqsave(&master_lp->netdev->queue_lock, flags);
-	lp->last->next = lp->next;
-	lp->next->last = lp->last;
-	if (master_lp->netdev->queue == lp) {
-		master_lp->netdev->queue = lp->next;
-		if (lp->next == lp) { /* last in queue */
-			master_lp->netdev->queue = master_lp->netdev->local;
-		}
-	}
-	lp->next = lp->last = lp;	/* (re)set own pointers */
-//	printk(KERN_DEBUG "%s: mndq(%p)\n",
-//		__func__, master_lp->netdev->queue);
-	spin_unlock_irqrestore(&master_lp->netdev->queue_lock, flags);
-}