Message-Id: <20190423151143.464992-4-arnd@arndb.de>
Date:   Tue, 23 Apr 2019 17:11:35 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Karsten Keil <isdn@...ux-pingi.de>, netdev@...r.kernel.org
Cc:     isdn4linux@...tserv.isdn4linux.de, Paul Bolle <pebolle@...cali.nl>,
        Holger Schurig <holgerschurig@...glemail.com>,
        Tilman Schmidt <tilman@...p.cc>,
        Al Viro <viro@...iv.linux.org.uk>,
        gigaset307x-common@...ts.sourceforge.net,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 3/5] 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 shut down 2018,
which must have drastically reduced the number of legacy installations,
if there were any that managed to get isdn4linux to work with a linux-4.x
kernel at all.

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
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 Documentation/isdn/INTERFACE        |  759 ------
 Documentation/isdn/INTERFACE.fax    |  163 --
 Documentation/isdn/README           |  599 -----
 Documentation/isdn/README.FAQ       |   26 -
 Documentation/isdn/README.audio     |  138 -
 Documentation/isdn/README.concap    |  259 --
 Documentation/isdn/README.diversion |  127 -
 Documentation/isdn/README.fax       |   45 -
 Documentation/isdn/README.hfc-pci   |   41 -
 Documentation/isdn/README.syncppp   |   58 -
 Documentation/isdn/README.x25       |  184 --
 Documentation/isdn/syncPPP.FAQ      |  224 --
 Documentation/process/changes.rst   |   16 +-
 MAINTAINERS                         |    2 -
 drivers/isdn/Kconfig                |   26 -
 drivers/isdn/Makefile               |    2 -
 drivers/isdn/capi/Kconfig           |    9 -
 drivers/isdn/capi/capidrv.c         | 2525 ------------------
 drivers/isdn/capi/capidrv.h         |  140 -
 drivers/isdn/divert/Makefile        |    9 -
 drivers/isdn/divert/divert_init.c   |   82 -
 drivers/isdn/divert/divert_procfs.c |  336 ---
 drivers/isdn/divert/isdn_divert.c   |  846 ------
 drivers/isdn/divert/isdn_divert.h   |  132 -
 drivers/isdn/i4l/Kconfig            |  126 -
 drivers/isdn/i4l/Makefile           |   14 -
 drivers/isdn/i4l/isdn_audio.c       |  711 -----
 drivers/isdn/i4l/isdn_audio.h       |   44 -
 drivers/isdn/i4l/isdn_bsdcomp.c     |  930 -------
 drivers/isdn/i4l/isdn_common.c      | 2368 -----------------
 drivers/isdn/i4l/isdn_common.h      |   47 -
 drivers/isdn/i4l/isdn_concap.c      |   99 -
 drivers/isdn/i4l/isdn_concap.h      |   11 -
 drivers/isdn/i4l/isdn_net.c         | 3198 -----------------------
 drivers/isdn/i4l/isdn_net.h         |  151 --
 drivers/isdn/i4l/isdn_ppp.c         | 3053 ----------------------
 drivers/isdn/i4l/isdn_ppp.h         |   41 -
 drivers/isdn/i4l/isdn_tty.c         | 3756 ---------------------------
 drivers/isdn/i4l/isdn_tty.h         |  120 -
 drivers/isdn/i4l/isdn_ttyfax.c      | 1123 --------
 drivers/isdn/i4l/isdn_ttyfax.h      |   17 -
 drivers/isdn/i4l/isdn_v110.c        |  625 -----
 drivers/isdn/i4l/isdn_v110.h        |   29 -
 drivers/isdn/i4l/isdn_x25iface.c    |  332 ---
 drivers/isdn/i4l/isdn_x25iface.h    |   30 -
 drivers/isdn/isdnloop/Makefile      |    5 -
 drivers/isdn/isdnloop/isdnloop.c    | 1528 -----------
 drivers/isdn/isdnloop/isdnloop.h    |  112 -
 include/linux/concap.h              |  112 -
 include/linux/isdn.h                |  473 ----
 include/linux/isdn_divertif.h       |   35 -
 include/linux/isdn_ppp.h            |  194 --
 include/linux/isdnif.h              |  505 ----
 include/linux/wanrouter.h           |   11 -
 include/uapi/linux/isdn.h           |  144 -
 include/uapi/linux/isdn_divertif.h  |   31 -
 include/uapi/linux/isdn_ppp.h       |   68 -
 include/uapi/linux/isdnif.h         |   57 -
 include/uapi/linux/wanrouter.h      |   18 -
 59 files changed, 2 insertions(+), 26864 deletions(-)
 delete mode 100644 Documentation/isdn/INTERFACE
 delete mode 100644 Documentation/isdn/INTERFACE.fax
 delete mode 100644 Documentation/isdn/README
 delete mode 100644 Documentation/isdn/README.FAQ
 delete mode 100644 Documentation/isdn/README.audio
 delete mode 100644 Documentation/isdn/README.concap
 delete mode 100644 Documentation/isdn/README.diversion
 delete mode 100644 Documentation/isdn/README.fax
 delete mode 100644 Documentation/isdn/README.hfc-pci
 delete mode 100644 Documentation/isdn/README.syncppp
 delete mode 100644 Documentation/isdn/README.x25
 delete mode 100644 Documentation/isdn/syncPPP.FAQ
 delete mode 100644 drivers/isdn/capi/capidrv.c
 delete mode 100644 drivers/isdn/capi/capidrv.h
 delete mode 100644 drivers/isdn/divert/Makefile
 delete mode 100644 drivers/isdn/divert/divert_init.c
 delete mode 100644 drivers/isdn/divert/divert_procfs.c
 delete mode 100644 drivers/isdn/divert/isdn_divert.c
 delete mode 100644 drivers/isdn/divert/isdn_divert.h
 delete mode 100644 drivers/isdn/i4l/Kconfig
 delete mode 100644 drivers/isdn/i4l/isdn_audio.c
 delete mode 100644 drivers/isdn/i4l/isdn_audio.h
 delete mode 100644 drivers/isdn/i4l/isdn_bsdcomp.c
 delete mode 100644 drivers/isdn/i4l/isdn_common.c
 delete mode 100644 drivers/isdn/i4l/isdn_common.h
 delete mode 100644 drivers/isdn/i4l/isdn_concap.c
 delete mode 100644 drivers/isdn/i4l/isdn_concap.h
 delete mode 100644 drivers/isdn/i4l/isdn_net.c
 delete mode 100644 drivers/isdn/i4l/isdn_net.h
 delete mode 100644 drivers/isdn/i4l/isdn_ppp.c
 delete mode 100644 drivers/isdn/i4l/isdn_ppp.h
 delete mode 100644 drivers/isdn/i4l/isdn_tty.c
 delete mode 100644 drivers/isdn/i4l/isdn_tty.h
 delete mode 100644 drivers/isdn/i4l/isdn_ttyfax.c
 delete mode 100644 drivers/isdn/i4l/isdn_ttyfax.h
 delete mode 100644 drivers/isdn/i4l/isdn_v110.c
 delete mode 100644 drivers/isdn/i4l/isdn_v110.h
 delete mode 100644 drivers/isdn/i4l/isdn_x25iface.c
 delete mode 100644 drivers/isdn/i4l/isdn_x25iface.h
 delete mode 100644 drivers/isdn/isdnloop/Makefile
 delete mode 100644 drivers/isdn/isdnloop/isdnloop.c
 delete mode 100644 drivers/isdn/isdnloop/isdnloop.h
 delete mode 100644 include/linux/concap.h
 delete mode 100644 include/linux/isdn.h
 delete mode 100644 include/linux/isdn_divertif.h
 delete mode 100644 include/linux/isdn_ppp.h
 delete mode 100644 include/linux/isdnif.h
 delete mode 100644 include/linux/wanrouter.h
 delete mode 100644 include/uapi/linux/isdn.h
 delete mode 100644 include/uapi/linux/isdn_divertif.h
 delete mode 100644 include/uapi/linux/isdn_ppp.h
 delete mode 100644 include/uapi/linux/isdnif.h
 delete mode 100644 include/uapi/linux/wanrouter.h

diff --git a/Documentation/isdn/INTERFACE b/Documentation/isdn/INTERFACE
deleted file mode 100644
index 5df17e5b25c8..000000000000
diff --git a/Documentation/isdn/INTERFACE.fax b/Documentation/isdn/INTERFACE.fax
deleted file mode 100644
index 9c8c6d914ec7..000000000000
diff --git a/Documentation/isdn/README b/Documentation/isdn/README
deleted file mode 100644
index 74bd2bdb455b..000000000000
diff --git a/Documentation/isdn/README.FAQ b/Documentation/isdn/README.FAQ
deleted file mode 100644
index e5dd1addacdd..000000000000
diff --git a/Documentation/isdn/README.audio b/Documentation/isdn/README.audio
deleted file mode 100644
index 8ebca19290d9..000000000000
diff --git a/Documentation/isdn/README.concap b/Documentation/isdn/README.concap
deleted file mode 100644
index a76d74845a4c..000000000000
diff --git a/Documentation/isdn/README.diversion b/Documentation/isdn/README.diversion
deleted file mode 100644
index bddcd5fb86ff..000000000000
diff --git a/Documentation/isdn/README.fax b/Documentation/isdn/README.fax
deleted file mode 100644
index 5314958a8a6e..000000000000
diff --git a/Documentation/isdn/README.hfc-pci b/Documentation/isdn/README.hfc-pci
deleted file mode 100644
index e8a4ef0226e8..000000000000
diff --git a/Documentation/isdn/README.syncppp b/Documentation/isdn/README.syncppp
deleted file mode 100644
index 27d260095cce..000000000000
diff --git a/Documentation/isdn/README.x25 b/Documentation/isdn/README.x25
deleted file mode 100644
index e561a77c4e22..000000000000
diff --git a/Documentation/isdn/syncPPP.FAQ b/Documentation/isdn/syncPPP.FAQ
deleted file mode 100644
index 3257a4bc0786..000000000000
diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst
index 18735dc460a0..111636ad1bad 100644
--- a/Documentation/process/changes.rst
+++ b/Documentation/process/changes.rst
@@ -23,8 +23,8 @@ running, the suggested command should tell you.
 
 Again, keep in mind that this list assumes you are already functionally
 running a Linux kernel.  Also, not all tools are necessary on all
-systems; obviously, if you don't have any ISDN hardware, for example,
-you probably needn't concern yourself with isdn4k-utils.
+systems; obviously, if you don't have any PC Card hardware, for example,
+you probably needn't concern yourself with pcmciautils.
 
 ====================== ===============  ========================================
         Program        Minimal version       Command to check the version
@@ -45,7 +45,6 @@ btrfs-progs            0.18             btrfsck
 pcmciautils            004              pccardctl -V
 quota-tools            3.09             quota -V
 PPP                    2.4.0            pppd --version
-isdn4k-utils           3.1pre1          isdnctrl 2>&1|grep version
 nfs-utils              1.0.5            showmount --version
 procps                 3.2.0            ps --version
 oprofile               0.9              oprofiled --version
@@ -279,12 +278,6 @@ which can be made by::
 
 as root.
 
-Isdn4k-utils
-------------
-
-Due to changes in the length of the phone number field, isdn4k-utils
-needs to be recompiled or (preferably) upgraded.
-
 NFS-utils
 ---------
 
@@ -448,11 +441,6 @@ PPP
 
 - <ftp://ftp.samba.org/pub/ppp/>
 
-Isdn4k-utils
-------------
-
-- <ftp://ftp.isdn4linux.de/pub/isdn4linux/utils/>
-
 NFS-utils
 ---------
 
diff --git a/MAINTAINERS b/MAINTAINERS
index 3671fdea5010..1e3a739f0145 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8245,9 +8245,7 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kkeil/isdn-2.6.git
 S:	Maintained
 F:	Documentation/isdn/
 F:	drivers/isdn/
-F:	include/linux/isdn.h
 F:	include/linux/isdn/
-F:	include/uapi/linux/isdn.h
 F:	include/uapi/linux/isdn/
 
 IT87 HARDWARE MONITORING DRIVER
diff --git a/drivers/isdn/Kconfig b/drivers/isdn/Kconfig
index ef661acdda17..161f7527df70 100644
--- a/drivers/isdn/Kconfig
+++ b/drivers/isdn/Kconfig
@@ -20,27 +20,6 @@ menuconfig ISDN
 
 if ISDN
 
-menuconfig ISDN_I4L
-	tristate "Old ISDN4Linux (deprecated)"
-	depends on TTY
-	---help---
-	  This driver allows you to use an ISDN adapter for networking
-	  connections and as dialin/out device.  The isdn-tty's have a built
-	  in AT-compatible modem emulator.  Network devices support autodial,
-	  channel-bundling, callback and caller-authentication without having
-	  a daemon running.  A reduced T.70 protocol is supported with tty's
-	  suitable for German BTX.  On D-Channel, the protocols EDSS1
-	  (Euro-ISDN) and 1TR6 (German style) are supported.  See
-	  <file:Documentation/isdn/README> for more information.
-
-	  ISDN support in the linux kernel is moving towards a new API,
-	  called CAPI (Common ISDN Application Programming Interface).
-	  Therefore the old ISDN4Linux layer will eventually become obsolete.
-	  It is still available, though, for use with adapters that are not
-	  supported by the new CAPI subsystem yet.
-
-source "drivers/isdn/i4l/Kconfig"
-
 menuconfig ISDN_CAPI
 	tristate "CAPI 2.0 subsystem"
 	help
@@ -70,9 +49,4 @@ source "drivers/isdn/hysdn/Kconfig"
 
 source "drivers/isdn/mISDN/Kconfig"
 
-config ISDN_HDLC
-	tristate
-	select CRC_CCITT
-	select BITREVERSE
-
 endif # ISDN
diff --git a/drivers/isdn/Makefile b/drivers/isdn/Makefile
index 7487f0bbe855..379b4a03c321 100644
--- a/drivers/isdn/Makefile
+++ b/drivers/isdn/Makefile
@@ -7,7 +7,5 @@ obj-$(CONFIG_ISDN_I4L)			+= i4l/
 obj-$(CONFIG_ISDN_CAPI)			+= capi/
 obj-$(CONFIG_MISDN)			+= mISDN/
 obj-$(CONFIG_ISDN)			+= hardware/
-obj-$(CONFIG_ISDN_DIVERSION)		+= divert/
-obj-$(CONFIG_ISDN_DRV_LOOP)		+= isdnloop/
 obj-$(CONFIG_HYSDN)			+= hysdn/
 obj-$(CONFIG_ISDN_DRV_GIGASET)		+= gigaset/
diff --git a/drivers/isdn/capi/Kconfig b/drivers/isdn/capi/Kconfig
index 7641b3096ea6..fe4a265c2c6d 100644
--- a/drivers/isdn/capi/Kconfig
+++ b/drivers/isdn/capi/Kconfig
@@ -26,15 +26,6 @@ config ISDN_CAPI_MIDDLEWARE
 	  device.  If you want to use pppd with pppdcapiplugin to dial up to
 	  your ISP, say Y here.
 
-config ISDN_CAPI_CAPIDRV
-	tristate "CAPI2.0 capidrv interface support"
-	depends on ISDN_I4L
-	help
-	  This option provides the glue code to hook up CAPI driven cards to
-	  the legacy isdn4linux link layer.  If you have a card which is
-	  supported by a CAPI driver, but still want to use old features like
-	  ippp interfaces or ttyI emulation, say Y/M here.
-
 config ISDN_CAPI_CAPIDRV_VERBOSE
 	bool "Verbose reason code reporting"
 	depends on ISDN_CAPI_CAPIDRV
diff --git a/drivers/isdn/capi/capidrv.c b/drivers/isdn/capi/capidrv.c
deleted file mode 100644
index e8949f3dcae1..000000000000
diff --git a/drivers/isdn/capi/capidrv.h b/drivers/isdn/capi/capidrv.h
deleted file mode 100644
index 4466b2e0176d..000000000000
diff --git a/drivers/isdn/divert/Makefile b/drivers/isdn/divert/Makefile
deleted file mode 100644
index dd4a202e0bc2..000000000000
diff --git a/drivers/isdn/divert/divert_init.c b/drivers/isdn/divert/divert_init.c
deleted file mode 100644
index 267dede13bfd..000000000000
diff --git a/drivers/isdn/divert/divert_procfs.c b/drivers/isdn/divert/divert_procfs.c
deleted file mode 100644
index 342585e04fd3..000000000000
diff --git a/drivers/isdn/divert/isdn_divert.c b/drivers/isdn/divert/isdn_divert.c
deleted file mode 100644
index 5620fd2c6009..000000000000
diff --git a/drivers/isdn/divert/isdn_divert.h b/drivers/isdn/divert/isdn_divert.h
deleted file mode 100644
index 55033dd872c0..000000000000
diff --git a/drivers/isdn/i4l/Kconfig b/drivers/isdn/i4l/Kconfig
deleted file mode 100644
index dc8ab12199e9..000000000000
diff --git a/drivers/isdn/i4l/Makefile b/drivers/isdn/i4l/Makefile
index be77500c9e86..11fe697739d5 100644
--- a/drivers/isdn/i4l/Makefile
+++ b/drivers/isdn/i4l/Makefile
@@ -3,18 +3,4 @@
 
 # Each configuration option enables a list of files.
 
-obj-$(CONFIG_ISDN_I4L)		+= isdn.o
-obj-$(CONFIG_ISDN_PPP_BSDCOMP)	+= isdn_bsdcomp.o
 obj-$(CONFIG_ISDN_HDLC)		+= isdnhdlc.o
-
-# Multipart objects.
-
-isdn-y				:= isdn_net.o isdn_tty.o isdn_v110.o isdn_common.o
-
-# Optional parts of multipart objects.
-
-isdn-$(CONFIG_ISDN_PPP)		+= isdn_ppp.o
-isdn-$(CONFIG_ISDN_X25)		+= isdn_concap.o isdn_x25iface.o
-isdn-$(CONFIG_ISDN_AUDIO)		+= isdn_audio.o
-isdn-$(CONFIG_ISDN_TTY_FAX)	+= isdn_ttyfax.o
-
diff --git a/drivers/isdn/i4l/isdn_audio.c b/drivers/isdn/i4l/isdn_audio.c
deleted file mode 100644
index b6bcd1eca128..000000000000
diff --git a/drivers/isdn/i4l/isdn_audio.h b/drivers/isdn/i4l/isdn_audio.h
deleted file mode 100644
index 013c3582e0d1..000000000000
diff --git a/drivers/isdn/i4l/isdn_bsdcomp.c b/drivers/isdn/i4l/isdn_bsdcomp.c
deleted file mode 100644
index 7f28b967ed19..000000000000
diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
deleted file mode 100644
index 74ee00f5b310..000000000000
diff --git a/drivers/isdn/i4l/isdn_common.h b/drivers/isdn/i4l/isdn_common.h
deleted file mode 100644
index 2260ef07ab9c..000000000000
diff --git a/drivers/isdn/i4l/isdn_concap.c b/drivers/isdn/i4l/isdn_concap.c
deleted file mode 100644
index 336523ec077c..000000000000
diff --git a/drivers/isdn/i4l/isdn_concap.h b/drivers/isdn/i4l/isdn_concap.h
deleted file mode 100644
index cd7e3ba74e25..000000000000
diff --git a/drivers/isdn/i4l/isdn_net.c b/drivers/isdn/i4l/isdn_net.c
deleted file mode 100644
index c138f66f2659..000000000000
diff --git a/drivers/isdn/i4l/isdn_net.h b/drivers/isdn/i4l/isdn_net.h
deleted file mode 100644
index cca6d68da171..000000000000
diff --git a/drivers/isdn/i4l/isdn_ppp.c b/drivers/isdn/i4l/isdn_ppp.c
deleted file mode 100644
index 1f17126c5fa4..000000000000
diff --git a/drivers/isdn/i4l/isdn_ppp.h b/drivers/isdn/i4l/isdn_ppp.h
deleted file mode 100644
index 34b8a2ce84f3..000000000000
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
deleted file mode 100644
index 43700fc19a31..000000000000
diff --git a/drivers/isdn/i4l/isdn_tty.h b/drivers/isdn/i4l/isdn_tty.h
deleted file mode 100644
index a6f801d2263b..000000000000
diff --git a/drivers/isdn/i4l/isdn_ttyfax.c b/drivers/isdn/i4l/isdn_ttyfax.c
deleted file mode 100644
index 47aae4916730..000000000000
diff --git a/drivers/isdn/i4l/isdn_ttyfax.h b/drivers/isdn/i4l/isdn_ttyfax.h
deleted file mode 100644
index ccda4fcf8f7b..000000000000
diff --git a/drivers/isdn/i4l/isdn_v110.c b/drivers/isdn/i4l/isdn_v110.c
deleted file mode 100644
index d11fe76f138f..000000000000
diff --git a/drivers/isdn/i4l/isdn_v110.h b/drivers/isdn/i4l/isdn_v110.h
deleted file mode 100644
index de774ab598c9..000000000000
diff --git a/drivers/isdn/i4l/isdn_x25iface.c b/drivers/isdn/i4l/isdn_x25iface.c
deleted file mode 100644
index 48bfbcb4a09d..000000000000
diff --git a/drivers/isdn/i4l/isdn_x25iface.h b/drivers/isdn/i4l/isdn_x25iface.h
deleted file mode 100644
index ca08e082cf7c..000000000000
diff --git a/drivers/isdn/isdnloop/Makefile b/drivers/isdn/isdnloop/Makefile
deleted file mode 100644
index 317cd3c5b8ee..000000000000
diff --git a/drivers/isdn/isdnloop/isdnloop.c b/drivers/isdn/isdnloop/isdnloop.c
deleted file mode 100644
index 755c6bbc9553..000000000000
diff --git a/drivers/isdn/isdnloop/isdnloop.h b/drivers/isdn/isdnloop/isdnloop.h
deleted file mode 100644
index e9e035552bb4..000000000000
diff --git a/include/linux/concap.h b/include/linux/concap.h
deleted file mode 100644
index 977acb3d1fb2..000000000000
diff --git a/include/linux/isdn.h b/include/linux/isdn.h
deleted file mode 100644
index df97c8444f5d..000000000000
diff --git a/include/linux/isdn_divertif.h b/include/linux/isdn_divertif.h
deleted file mode 100644
index 19ab361f9f07..000000000000
diff --git a/include/linux/isdn_ppp.h b/include/linux/isdn_ppp.h
deleted file mode 100644
index a0070c6dfaf8..000000000000
diff --git a/include/linux/isdnif.h b/include/linux/isdnif.h
deleted file mode 100644
index 8d80fdc68647..000000000000
diff --git a/include/linux/wanrouter.h b/include/linux/wanrouter.h
deleted file mode 100644
index f6358558f9f5..000000000000
diff --git a/include/uapi/linux/isdn.h b/include/uapi/linux/isdn.h
deleted file mode 100644
index f371fd52ed75..000000000000
diff --git a/include/uapi/linux/isdn_divertif.h b/include/uapi/linux/isdn_divertif.h
deleted file mode 100644
index 0a17bb1bcb1b..000000000000
diff --git a/include/uapi/linux/isdn_ppp.h b/include/uapi/linux/isdn_ppp.h
deleted file mode 100644
index 0bdc4efaacb2..000000000000
diff --git a/include/uapi/linux/isdnif.h b/include/uapi/linux/isdnif.h
deleted file mode 100644
index 611a69196738..000000000000
diff --git a/include/uapi/linux/wanrouter.h b/include/uapi/linux/wanrouter.h
deleted file mode 100644
index 2f1216d00caa..000000000000
-- 
2.20.0

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