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, 66 deletions

diff --git a/drivers/isdn/hisax/hisax_if.h b/drivers/isdn/hisax/hisax_if.h
deleted file mode 100644
index 7098d6bd5ff2..000000000000
--- a/drivers/isdn/hisax/hisax_if.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Interface between low level (hardware) drivers and
- * HiSax protocol stack
- *
- * Author       Kai Germaschewski
- * Copyright    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.
- *
- */
-
-#ifndef __HISAX_IF_H__
-#define __HISAX_IF_H__
-
-#include <linux/skbuff.h>
-
-#define REQUEST		0
-#define CONFIRM		1
-#define INDICATION	2
-#define RESPONSE	3
-
-#define PH_ACTIVATE	0x0100
-#define PH_DEACTIVATE	0x0110
-#define PH_DATA		0x0120
-#define PH_PULL		0x0130
-#define PH_DATA_E	0x0140
-
-#define L1_MODE_NULL	0
-#define L1_MODE_TRANS	1
-#define L1_MODE_HDLC	2
-#define L1_MODE_EXTRN	3
-#define L1_MODE_HDLC_56K 4
-#define L1_MODE_MODEM	7
-#define L1_MODE_V32	8
-#define L1_MODE_FAX	9
-
-struct hisax_if {
-	void *priv; // private to driver
-	void (*l1l2)(struct hisax_if *, int pr, void *arg);
-	void (*l2l1)(struct hisax_if *, int pr, void *arg);
-};
-
-struct hisax_b_if {
-	struct hisax_if ifc;
-
-	// private to hisax
-	struct BCState *bcs;
-};
-
-struct hisax_d_if {
-	struct hisax_if ifc;
-
-	// private to hisax
-	struct module *owner;
-	struct IsdnCardState *cs;
-	struct hisax_b_if *b_if[2];
-	struct sk_buff_head erq;
-	unsigned long ph_state;
-};
-
-int hisax_register(struct hisax_d_if *hisax_if, struct hisax_b_if *b_if[],
-		   char *name, int protocol);
-void hisax_unregister(struct hisax_d_if *hisax_if);
-
-#endif