isdn: remove hisax driver

With the decline of ISDN, this seems to have become almost completely
obsolete, and even in the past years before that, almost all remaining
users appear to have used mISDN instead.

Birger Harzenetter noted that he is still using i4l/hisax to take
advantage of the 'divert' driver for call diversion, but otherwise uses
mISDN on the same hardware. This is a rare edge case as far as I
can tell, but we are still breaking an actively used work flow
(see https://xkcd.com/1172/).

We debated moving i4l/hisax to staging as an intermediate step, but as
he is not likely to change the setup, and that would just delay breaking
this use case.  The alternatives here are to stay on stable kernels
< 5.2, to create an external driver repository for isdn4linux, or to
add divert functionality to mISDN.

Cc: Birger Harzenetter <WIMPy@yeti.dk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 221 deletions

diff --git a/drivers/isdn/hisax/st5481_init.c b/drivers/isdn/hisax/st5481_init.c
deleted file mode 100644
index 54ef9e4f8cbc..000000000000
--- a/drivers/isdn/hisax/st5481_init.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * Driver for ST5481 USB ISDN modem
- *
- * Author       Frode Isaksen
- * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
- *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.de>
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-
-/*
- * TODO:
- *
- * b layer1 delay?
- * hotplug / unregister issues
- * mod_inc/dec_use_count
- * unify parts of d/b channel usb handling
- * file header
- * avoid copy to isoc buffer?
- * improve usb delay?
- * merge l1 state machines?
- * clean up debug
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/usb.h>
-#include <linux/slab.h>
-#include "st5481.h"
-
-MODULE_DESCRIPTION("ISDN4Linux: driver for ST5481 USB ISDN adapter");
-MODULE_AUTHOR("Frode Isaksen");
-MODULE_LICENSE("GPL");
-
-static int protocol = 2;       /* EURO-ISDN Default */
-module_param(protocol, int, 0);
-
-static int number_of_leds = 2;       /* 2 LEDs on the adpater default */
-module_param(number_of_leds, int, 0);
-
-#ifdef CONFIG_HISAX_DEBUG
-static int debug = 0;
-module_param(debug, int, 0);
-#endif
-int st5481_debug;
-
-/* ======================================================================
- * registration/deregistration with the USB layer
- */
-
-/*
- * This function will be called when the adapter is plugged
- * into the USB bus.
- */
-static int probe_st5481(struct usb_interface *intf,
-			const struct usb_device_id *id)
-{
-	struct usb_device *dev = interface_to_usbdev(intf);
-	struct st5481_adapter *adapter;
-	struct hisax_b_if *b_if[2];
-	int retval, i;
-
-	printk(KERN_INFO "st541: found adapter VendorId %04x, ProductId %04x, LEDs %d\n",
-	       le16_to_cpu(dev->descriptor.idVendor),
-	       le16_to_cpu(dev->descriptor.idProduct),
-	       number_of_leds);
-
-	adapter = kzalloc(sizeof(struct st5481_adapter), GFP_KERNEL);
-	if (!adapter)
-		return -ENOMEM;
-
-	adapter->number_of_leds = number_of_leds;
-	adapter->usb_dev = dev;
-
-	adapter->hisax_d_if.owner = THIS_MODULE;
-	adapter->hisax_d_if.ifc.priv = adapter;
-	adapter->hisax_d_if.ifc.l2l1 = st5481_d_l2l1;
-
-	for (i = 0; i < 2; i++) {
-		adapter->bcs[i].adapter = adapter;
-		adapter->bcs[i].channel = i;
-		adapter->bcs[i].b_if.ifc.priv = &adapter->bcs[i];
-		adapter->bcs[i].b_if.ifc.l2l1 = st5481_b_l2l1;
-	}
-
-	retval = st5481_setup_usb(adapter);
-	if (retval < 0)
-		goto err;
-
-	retval = st5481_setup_d(adapter);
-	if (retval < 0)
-		goto err_usb;
-
-	retval = st5481_setup_b(&adapter->bcs[0]);
-	if (retval < 0)
-		goto err_d;
-
-	retval = st5481_setup_b(&adapter->bcs[1]);
-	if (retval < 0)
-		goto err_b;
-
-	for (i = 0; i < 2; i++)
-		b_if[i] = &adapter->bcs[i].b_if;
-
-	if (hisax_register(&adapter->hisax_d_if, b_if, "st5481_usb",
-			   protocol) != 0)
-		goto err_b1;
-
-	st5481_start(adapter);
-
-	usb_set_intfdata(intf, adapter);
-	return 0;
-
-err_b1:
-	st5481_release_b(&adapter->bcs[1]);
-err_b:
-	st5481_release_b(&adapter->bcs[0]);
-err_d:
-	st5481_release_d(adapter);
-err_usb:
-	st5481_release_usb(adapter);
-err:
-	kfree(adapter);
-	return -EIO;
-}
-
-/*
- * This function will be called when the adapter is removed
- * from the USB bus.
- */
-static void disconnect_st5481(struct usb_interface *intf)
-{
-	struct st5481_adapter *adapter = usb_get_intfdata(intf);
-
-	DBG(1, "");
-
-	usb_set_intfdata(intf, NULL);
-	if (!adapter)
-		return;
-
-	st5481_stop(adapter);
-	st5481_release_b(&adapter->bcs[1]);
-	st5481_release_b(&adapter->bcs[0]);
-	st5481_release_d(adapter);
-	// we would actually better wait for completion of outstanding urbs
-	mdelay(2);
-	st5481_release_usb(adapter);
-
-	hisax_unregister(&adapter->hisax_d_if);
-
-	kfree(adapter);
-}
-
-/*
- * The last 4 bits in the Product Id is set with 4 pins on the chip.
- */
-static struct usb_device_id st5481_ids[] = {
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x0) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x1) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x2) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x3) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x4) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x5) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x6) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x7) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x8) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x9) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xA) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xB) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xC) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xD) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xE) },
-	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xF) },
-	{ }
-};
-MODULE_DEVICE_TABLE(usb, st5481_ids);
-
-static struct usb_driver st5481_usb_driver = {
-	.name =		"st5481_usb",
-	.probe =	probe_st5481,
-	.disconnect =	disconnect_st5481,
-	.id_table =	st5481_ids,
-	.disable_hub_initiated_lpm = 1,
-};
-
-static int __init st5481_usb_init(void)
-{
-	int retval;
-
-#ifdef CONFIG_HISAX_DEBUG
-	st5481_debug = debug;
-#endif
-
-	printk(KERN_INFO "hisax_st5481: ST5481 USB ISDN driver $Revision: 2.4.2.3 $\n");
-
-	retval = st5481_d_init();
-	if (retval < 0)
-		goto out;
-
-	retval = usb_register(&st5481_usb_driver);
-	if (retval < 0)
-		goto out_d_exit;
-
-	return 0;
-
-out_d_exit:
-	st5481_d_exit();
-out:
-	return retval;
-}
-
-static void __exit st5481_usb_exit(void)
-{
-	usb_deregister(&st5481_usb_driver);
-	st5481_d_exit();
-}
-
-module_init(st5481_usb_init);
-module_exit(st5481_usb_exit);