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>

1 files changed, 0 insertions, 243 deletions

diff --git a/drivers/isdn/hardware/avm/b1isa.c b/drivers/isdn/hardware/avm/b1isa.c
deleted file mode 100644
index cdfea72e0ef6..000000000000
--- a/drivers/isdn/hardware/avm/b1isa.c
+++ /dev/null
@@ -1,243 +0,0 @@
-/* $Id: b1isa.c,v 1.1.2.3 2004/02/10 01:07:12 keil Exp $
- *
- * Module for AVM B1 ISA-card.
- *
- * Copyright 1999 by Carsten Paeth <calle@calle.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/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/delay.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/capi.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <asm/io.h>
-#include <linux/isdn/capicmd.h>
-#include <linux/isdn/capiutil.h>
-#include <linux/isdn/capilli.h>
-#include "avmcard.h"
-
-/* ------------------------------------------------------------- */
-
-static char *revision = "$Revision: 1.1.2.3 $";
-
-/* ------------------------------------------------------------- */
-
-MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM B1 ISA card");
-MODULE_AUTHOR("Carsten Paeth");
-MODULE_LICENSE("GPL");
-
-/* ------------------------------------------------------------- */
-
-static void b1isa_remove(struct pci_dev *pdev)
-{
-	avmctrl_info *cinfo = pci_get_drvdata(pdev);
-	avmcard *card;
-
-	if (!cinfo)
-		return;
-
-	card = cinfo->card;
-
-	b1_reset(card->port);
-	b1_reset(card->port);
-
-	detach_capi_ctr(&cinfo->capi_ctrl);
-	free_irq(card->irq, card);
-	release_region(card->port, AVMB1_PORTLEN);
-	b1_free_card(card);
-}
-
-/* ------------------------------------------------------------- */
-
-static char *b1isa_procinfo(struct capi_ctr *ctrl);
-
-static int b1isa_probe(struct pci_dev *pdev)
-{
-	avmctrl_info *cinfo;
-	avmcard *card;
-	int retval;
-
-	card = b1_alloc_card(1);
-	if (!card) {
-		printk(KERN_WARNING "b1isa: no memory.\n");
-		retval = -ENOMEM;
-		goto err;
-	}
-
-	cinfo = card->ctrlinfo;
-
-	card->port = pci_resource_start(pdev, 0);
-	card->irq = pdev->irq;
-	card->cardtype = avm_b1isa;
-	sprintf(card->name, "b1isa-%x", card->port);
-
-	if (card->port != 0x150 && card->port != 0x250
-	    && card->port != 0x300 && card->port != 0x340) {
-		printk(KERN_WARNING "b1isa: invalid port 0x%x.\n", card->port);
-		retval = -EINVAL;
-		goto err_free;
-	}
-	if (b1_irq_table[card->irq & 0xf] == 0) {
-		printk(KERN_WARNING "b1isa: irq %d not valid.\n", card->irq);
-		retval = -EINVAL;
-		goto err_free;
-	}
-	if (!request_region(card->port, AVMB1_PORTLEN, card->name)) {
-		printk(KERN_WARNING "b1isa: ports 0x%03x-0x%03x in use.\n",
-		       card->port, card->port + AVMB1_PORTLEN);
-		retval = -EBUSY;
-		goto err_free;
-	}
-	retval = request_irq(card->irq, b1_interrupt, 0, card->name, card);
-	if (retval) {
-		printk(KERN_ERR "b1isa: unable to get IRQ %d.\n", card->irq);
-		goto err_release_region;
-	}
-	b1_reset(card->port);
-	if ((retval = b1_detect(card->port, card->cardtype)) != 0) {
-		printk(KERN_NOTICE "b1isa: NO card at 0x%x (%d)\n",
-		       card->port, retval);
-		retval = -ENODEV;
-		goto err_free_irq;
-	}
-	b1_reset(card->port);
-	b1_getrevision(card);
-
-	cinfo->capi_ctrl.owner = THIS_MODULE;
-	cinfo->capi_ctrl.driver_name   = "b1isa";
-	cinfo->capi_ctrl.driverdata    = cinfo;
-	cinfo->capi_ctrl.register_appl = b1_register_appl;
-	cinfo->capi_ctrl.release_appl  = b1_release_appl;
-	cinfo->capi_ctrl.send_message  = b1_send_message;
-	cinfo->capi_ctrl.load_firmware = b1_load_firmware;
-	cinfo->capi_ctrl.reset_ctr     = b1_reset_ctr;
-	cinfo->capi_ctrl.procinfo      = b1isa_procinfo;
-	cinfo->capi_ctrl.proc_show     = b1_proc_show;
-	strcpy(cinfo->capi_ctrl.name, card->name);
-
-	retval = attach_capi_ctr(&cinfo->capi_ctrl);
-	if (retval) {
-		printk(KERN_ERR "b1isa: attach controller failed.\n");
-		goto err_free_irq;
-	}
-
-	printk(KERN_INFO "b1isa: AVM B1 ISA at i/o %#x, irq %d, revision %d\n",
-	       card->port, card->irq, card->revision);
-
-	pci_set_drvdata(pdev, cinfo);
-	return 0;
-
-err_free_irq:
-	free_irq(card->irq, card);
-err_release_region:
-	release_region(card->port, AVMB1_PORTLEN);
-err_free:
-	b1_free_card(card);
-err:
-	return retval;
-}
-
-static char *b1isa_procinfo(struct capi_ctr *ctrl)
-{
-	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
-
-	if (!cinfo)
-		return "";
-	sprintf(cinfo->infobuf, "%s %s 0x%x %d r%d",
-		cinfo->cardname[0] ? cinfo->cardname : "-",
-		cinfo->version[VER_DRIVER] ? cinfo->version[VER_DRIVER] : "-",
-		cinfo->card ? cinfo->card->port : 0x0,
-		cinfo->card ? cinfo->card->irq : 0,
-		cinfo->card ? cinfo->card->revision : 0
-		);
-	return cinfo->infobuf;
-}
-
-/* ------------------------------------------------------------- */
-
-#define MAX_CARDS 4
-static struct pci_dev isa_dev[MAX_CARDS];
-static int io[MAX_CARDS];
-static int irq[MAX_CARDS];
-
-module_param_hw_array(io, int, ioport, NULL, 0);
-module_param_hw_array(irq, int, irq, NULL, 0);
-MODULE_PARM_DESC(io, "I/O base address(es)");
-MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
-
-static int b1isa_add_card(struct capi_driver *driver, capicardparams *data)
-{
-	int i;
-
-	for (i = 0; i < MAX_CARDS; i++) {
-		if (isa_dev[i].resource[0].start)
-			continue;
-
-		isa_dev[i].resource[0].start = data->port;
-		isa_dev[i].irq = data->irq;
-
-		if (b1isa_probe(&isa_dev[i]) == 0)
-			return 0;
-	}
-	return -ENODEV;
-}
-
-static struct capi_driver capi_driver_b1isa = {
-	.name		= "b1isa",
-	.revision	= "1.0",
-	.add_card       = b1isa_add_card,
-};
-
-static int __init b1isa_init(void)
-{
-	char *p;
-	char rev[32];
-	int i;
-
-	if ((p = strchr(revision, ':')) != NULL && p[1]) {
-		strlcpy(rev, p + 2, 32);
-		if ((p = strchr(rev, '$')) != NULL && p > rev)
-			*(p - 1) = 0;
-	} else
-		strcpy(rev, "1.0");
-
-	for (i = 0; i < MAX_CARDS; i++) {
-		if (!io[i])
-			break;
-
-		isa_dev[i].resource[0].start = io[i];
-		isa_dev[i].irq = irq[i];
-
-		if (b1isa_probe(&isa_dev[i]) != 0)
-			return -ENODEV;
-	}
-
-	strlcpy(capi_driver_b1isa.revision, rev, 32);
-	register_capi_driver(&capi_driver_b1isa);
-	printk(KERN_INFO "b1isa: revision %s\n", rev);
-
-	return 0;
-}
-
-static void __exit b1isa_exit(void)
-{
-	int i;
-
-	for (i = 0; i < MAX_CARDS; i++) {
-		if (isa_dev[i].resource[0].start)
-			b1isa_remove(&isa_dev[i]);
-	}
-	unregister_capi_driver(&capi_driver_b1isa);
-}
-
-module_init(b1isa_init);
-module_exit(b1isa_exit);