isdn: move capi drivers to staging

I tried to find any indication of whether the capi drivers are still in
use, and have not found anything from a long time ago.

With public ISDN networks almost completely shut down over the past 12
months, there is very little you can actually do with this hardware. The
main remaining use case would be to connect ISDN voice phones to an
in-house installation with Asterisk or LCR, but anyone trying this in
turn seems to be using either the mISDN driver stack, or out-of-tree
drivers from the hardware vendors.

I may of course have missed something, so I would suggest moving these
three drivers (avm, hysdn, gigaset) into drivers/staging/ just in case
someone still uses them.

If nobody complains, we can remove them entirely in six months, or
otherwise move the core code and any drivers that are still needed back
into drivers/isdn.

As Paul Bolle notes, he is still testing the gigaset driver as long as
he can, but the Dutch ISDN network will be shut down in September 2019,
which puts an end to that.

Marcel Holtmann still maintains the Bluetooth CMTP profile and wants to
keep that alive, so the actual CAPI subsystem code remains in place for
now, after all other drivers are gone, CMTP and CAPI can be merged into
a single driver directory.

Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 357 deletions

diff --git a/drivers/isdn/hysdn/hysdn_proclog.c b/drivers/isdn/hysdn/hysdn_proclog.c
deleted file mode 100644
index 6e898b90e86e..000000000000
--- a/drivers/isdn/hysdn/hysdn_proclog.c
+++ /dev/null
@@ -1,357 +0,0 @@
-/* $Id: hysdn_proclog.c,v 1.9.6.3 2001/09/23 22:24:54 kai Exp $
- *
- * Linux driver for HYSDN cards, /proc/net filesystem log functions.
- *
- * Author    Werner Cornelius (werner@titro.de) for Hypercope GmbH
- * Copyright 1999 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.
- *
- */
-
-#include <linux/module.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <linux/kernel.h>
-
-#include "hysdn_defs.h"
-
-/* the proc subdir for the interface is defined in the procconf module */
-extern struct proc_dir_entry *hysdn_proc_entry;
-
-static DEFINE_MUTEX(hysdn_log_mutex);
-static void put_log_buffer(hysdn_card *card, char *cp);
-
-/*************************************************/
-/* structure keeping ascii log for device output */
-/*************************************************/
-struct log_data {
-	struct log_data *next;
-	unsigned long usage_cnt;/* number of files still to work */
-	void *proc_ctrl;	/* pointer to own control procdata structure */
-	char log_start[2];	/* log string start (final len aligned by size) */
-};
-
-/**********************************************/
-/* structure holding proc entrys for one card */
-/**********************************************/
-struct procdata {
-	struct proc_dir_entry *log;	/* log entry */
-	char log_name[15];	/* log filename */
-	struct log_data *log_head, *log_tail;	/* head and tail for queue */
-	int if_used;		/* open count for interface */
-	unsigned char logtmp[LOG_MAX_LINELEN];
-	wait_queue_head_t rd_queue;
-};
-
-
-/**********************************************/
-/* log function for cards error log interface */
-/**********************************************/
-void
-hysdn_card_errlog(hysdn_card *card, tErrLogEntry *logp, int maxsize)
-{
-	char buf[ERRLOG_TEXT_SIZE + 40];
-
-	sprintf(buf, "LOG 0x%08lX 0x%08lX : %s\n", logp->ulErrType, logp->ulErrSubtype, logp->ucText);
-	put_log_buffer(card, buf);	/* output the string */
-}				/* hysdn_card_errlog */
-
-/***************************************************/
-/* Log function using format specifiers for output */
-/***************************************************/
-void
-hysdn_addlog(hysdn_card *card, char *fmt, ...)
-{
-	struct procdata *pd = card->proclog;
-	char *cp;
-	va_list args;
-
-	if (!pd)
-		return;		/* log structure non existent */
-
-	cp = pd->logtmp;
-	cp += sprintf(cp, "HYSDN: card %d ", card->myid);
-
-	va_start(args, fmt);
-	cp += vsprintf(cp, fmt, args);
-	va_end(args);
-	*cp++ = '\n';
-	*cp = 0;
-
-	if (card->debug_flags & DEB_OUT_SYSLOG)
-		printk(KERN_INFO "%s", pd->logtmp);
-	else
-		put_log_buffer(card, pd->logtmp);
-
-}				/* hysdn_addlog */
-
-/********************************************/
-/* put an log buffer into the log queue.    */
-/* This buffer will be kept until all files */
-/* opened for read got the contents.        */
-/* Flushes buffers not longer in use.       */
-/********************************************/
-static void
-put_log_buffer(hysdn_card *card, char *cp)
-{
-	struct log_data *ib;
-	struct procdata *pd = card->proclog;
-	unsigned long flags;
-
-	if (!pd)
-		return;
-	if (!cp)
-		return;
-	if (!*cp)
-		return;
-	if (pd->if_used <= 0)
-		return;		/* no open file for read */
-
-	if (!(ib = kmalloc(sizeof(struct log_data) + strlen(cp), GFP_ATOMIC)))
-		return;	/* no memory */
-	strcpy(ib->log_start, cp);	/* set output string */
-	ib->next = NULL;
-	ib->proc_ctrl = pd;	/* point to own control structure */
-	spin_lock_irqsave(&card->hysdn_lock, flags);
-	ib->usage_cnt = pd->if_used;
-	if (!pd->log_head)
-		pd->log_head = ib;	/* new head */
-	else
-		pd->log_tail->next = ib;	/* follows existing messages */
-	pd->log_tail = ib;	/* new tail */
-
-	/* delete old entrys */
-	while (pd->log_head->next) {
-		if ((pd->log_head->usage_cnt <= 0) &&
-		    (pd->log_head->next->usage_cnt <= 0)) {
-			ib = pd->log_head;
-			pd->log_head = pd->log_head->next;
-			kfree(ib);
-		} else {
-			break;
-		}
-	}		/* pd->log_head->next */
-
-	spin_unlock_irqrestore(&card->hysdn_lock, flags);
-
-	wake_up_interruptible(&(pd->rd_queue));		/* announce new entry */
-}				/* put_log_buffer */
-
-
-/******************************/
-/* file operations and tables */
-/******************************/
-
-/****************************************/
-/* write log file -> set log level bits */
-/****************************************/
-static ssize_t
-hysdn_log_write(struct file *file, const char __user *buf, size_t count, loff_t *off)
-{
-	int rc;
-	hysdn_card *card = file->private_data;
-
-	rc = kstrtoul_from_user(buf, count, 0, &card->debug_flags);
-	if (rc < 0)
-		return rc;
-	hysdn_addlog(card, "debug set to 0x%lx", card->debug_flags);
-	return (count);
-}				/* hysdn_log_write */
-
-/******************/
-/* read log file */
-/******************/
-static ssize_t
-hysdn_log_read(struct file *file, char __user *buf, size_t count, loff_t *off)
-{
-	struct log_data *inf;
-	int len;
-	hysdn_card *card = PDE_DATA(file_inode(file));
-
-	if (!(inf = *((struct log_data **) file->private_data))) {
-		struct procdata *pd = card->proclog;
-		if (file->f_flags & O_NONBLOCK)
-			return (-EAGAIN);
-
-		wait_event_interruptible(pd->rd_queue, (inf =
-				*((struct log_data **) file->private_data)));
-	}
-	if (!inf)
-		return (0);
-
-	inf->usage_cnt--;	/* new usage count */
-	file->private_data = &inf->next;	/* next structure */
-	if ((len = strlen(inf->log_start)) <= count) {
-		if (copy_to_user(buf, inf->log_start, len))
-			return -EFAULT;
-		*off += len;
-		return (len);
-	}
-	return (0);
-}				/* hysdn_log_read */
-
-/******************/
-/* open log file */
-/******************/
-static int
-hysdn_log_open(struct inode *ino, struct file *filep)
-{
-	hysdn_card *card = PDE_DATA(ino);
-
-	mutex_lock(&hysdn_log_mutex);
-	if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE) {
-		/* write only access -> write log level only */
-		filep->private_data = card;	/* remember our own card */
-	} else if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
-		struct procdata *pd = card->proclog;
-		unsigned long flags;
-
-		/* read access -> log/debug read */
-		spin_lock_irqsave(&card->hysdn_lock, flags);
-		pd->if_used++;
-		if (pd->log_head)
-			filep->private_data = &pd->log_tail->next;
-		else
-			filep->private_data = &pd->log_head;
-		spin_unlock_irqrestore(&card->hysdn_lock, flags);
-	} else {		/* simultaneous read/write access forbidden ! */
-		mutex_unlock(&hysdn_log_mutex);
-		return (-EPERM);	/* no permission this time */
-	}
-	mutex_unlock(&hysdn_log_mutex);
-	return nonseekable_open(ino, filep);
-}				/* hysdn_log_open */
-
-/*******************************************************************************/
-/* close a cardlog file. If the file has been opened for exclusive write it is */
-/* assumed as pof data input and the pof loader is noticed about.              */
-/* Otherwise file is handled as log output. In this case the interface usage   */
-/* count is decremented and all buffers are noticed of closing. If this file   */
-/* was the last one to be closed, all buffers are freed.                       */
-/*******************************************************************************/
-static int
-hysdn_log_close(struct inode *ino, struct file *filep)
-{
-	struct log_data *inf;
-	struct procdata *pd;
-	hysdn_card *card;
-	int retval = 0;
-
-	mutex_lock(&hysdn_log_mutex);
-	if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE) {
-		/* write only access -> write debug level written */
-		retval = 0;	/* success */
-	} else {
-		/* read access -> log/debug read, mark one further file as closed */
-
-		inf = *((struct log_data **) filep->private_data);	/* get first log entry */
-		if (inf)
-			pd = (struct procdata *) inf->proc_ctrl;	/* still entries there */
-		else {
-			/* no info available -> search card */
-			card = PDE_DATA(file_inode(filep));
-			pd = card->proclog;	/* pointer to procfs log */
-		}
-		if (pd)
-			pd->if_used--;	/* decrement interface usage count by one */
-
-		while (inf) {
-			inf->usage_cnt--;	/* decrement usage count for buffers */
-			inf = inf->next;
-		}
-
-		if (pd)
-			if (pd->if_used <= 0)	/* delete buffers if last file closed */
-				while (pd->log_head) {
-					inf = pd->log_head;
-					pd->log_head = pd->log_head->next;
-					kfree(inf);
-				}
-	}			/* read access */
-	mutex_unlock(&hysdn_log_mutex);
-
-	return (retval);
-}				/* hysdn_log_close */
-
-/*************************************************/
-/* select/poll routine to be able using select() */
-/*************************************************/
-static __poll_t
-hysdn_log_poll(struct file *file, poll_table *wait)
-{
-	__poll_t mask = 0;
-	hysdn_card *card = PDE_DATA(file_inode(file));
-	struct procdata *pd = card->proclog;
-
-	if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE)
-		return (mask);	/* no polling for write supported */
-
-	poll_wait(file, &(pd->rd_queue), wait);
-
-	if (*((struct log_data **) file->private_data))
-		mask |= EPOLLIN | EPOLLRDNORM;
-
-	return mask;
-}				/* hysdn_log_poll */
-
-/**************************************************/
-/* table for log filesystem functions defined above. */
-/**************************************************/
-static const struct file_operations log_fops =
-{
-	.owner		= THIS_MODULE,
-	.llseek         = no_llseek,
-	.read           = hysdn_log_read,
-	.write          = hysdn_log_write,
-	.poll           = hysdn_log_poll,
-	.open           = hysdn_log_open,
-	.release        = hysdn_log_close,
-};
-
-
-/***********************************************************************************/
-/* hysdn_proclog_init is called when the module is loaded after creating the cards */
-/* conf files.                                                                     */
-/***********************************************************************************/
-int
-hysdn_proclog_init(hysdn_card *card)
-{
-	struct procdata *pd;
-
-	/* create a cardlog proc entry */
-
-	if ((pd = kzalloc(sizeof(struct procdata), GFP_KERNEL)) != NULL) {
-		sprintf(pd->log_name, "%s%d", PROC_LOG_BASENAME, card->myid);
-		pd->log = proc_create_data(pd->log_name,
-				      S_IFREG | S_IRUGO | S_IWUSR, hysdn_proc_entry,
-				      &log_fops, card);
-
-		init_waitqueue_head(&(pd->rd_queue));
-
-		card->proclog = (void *) pd;	/* remember procfs structure */
-	}
-	return (0);
-}				/* hysdn_proclog_init */
-
-/************************************************************************************/
-/* hysdn_proclog_release is called when the module is unloaded and before the cards */
-/* conf file is released                                                            */
-/* The module counter is assumed to be 0 !                                          */
-/************************************************************************************/
-void
-hysdn_proclog_release(hysdn_card *card)
-{
-	struct procdata *pd;
-
-	if ((pd = (struct procdata *) card->proclog) != NULL) {
-		if (pd->log)
-			remove_proc_entry(pd->log_name, hysdn_proc_entry);
-		kfree(pd);	/* release memory */
-		card->proclog = NULL;
-	}
-}				/* hysdn_proclog_release */