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, 65 insertions, 0 deletions

diff --git a/drivers/staging/isdn/avm/Kconfig b/drivers/staging/isdn/avm/Kconfig
new file mode 100644
index 000000000000..81483db067bb
--- /dev/null
+++ b/drivers/staging/isdn/avm/Kconfig
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# ISDN AVM drivers
+#
+
+menuconfig CAPI_AVM
+	bool "Active AVM cards"
+	help
+	  Enable support for AVM active ISDN cards.
+
+if CAPI_AVM
+
+config ISDN_DRV_AVMB1_B1ISA
+	tristate "AVM B1 ISA support"
+	depends on ISA
+	help
+	  Enable support for the ISA version of the AVM B1 card.
+
+config ISDN_DRV_AVMB1_B1PCI
+	tristate "AVM B1 PCI support"
+	depends on PCI
+	help
+	  Enable support for the PCI version of the AVM B1 card.
+
+config ISDN_DRV_AVMB1_B1PCIV4
+	bool "AVM B1 PCI V4 support"
+	depends on ISDN_DRV_AVMB1_B1PCI
+	help
+	  Enable support for the V4 version of AVM B1 PCI card.
+
+config ISDN_DRV_AVMB1_T1ISA
+	tristate "AVM T1/T1-B ISA support"
+	depends on ISA
+	help
+	  Enable support for the AVM T1 T1B card.
+	  Note: This is a PRI card and handle 30 B-channels.
+
+config ISDN_DRV_AVMB1_B1PCMCIA
+	tristate "AVM B1/M1/M2 PCMCIA support"
+	depends on PCMCIA
+	help
+	  Enable support for the PCMCIA version of the AVM B1 card.
+
+config ISDN_DRV_AVMB1_AVM_CS
+	tristate "AVM B1/M1/M2 PCMCIA cs module"
+	depends on ISDN_DRV_AVMB1_B1PCMCIA
+	help
+	  Enable the PCMCIA client driver for the AVM B1/M1/M2
+	  PCMCIA cards.
+
+config ISDN_DRV_AVMB1_T1PCI
+	tristate "AVM T1/T1-B PCI support"
+	depends on PCI
+	help
+	  Enable support for the AVM T1 T1B card.
+	  Note: This is a PRI card and handle 30 B-channels.
+
+config ISDN_DRV_AVMB1_C4
+	tristate "AVM C4/C2 support"
+	depends on PCI
+	help
+	  Enable support for the AVM C4/C2 PCI cards.
+	  These cards handle 4/2 BRI ISDN lines (8/4 channels).
+
+endif # CAPI_AVM