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, 305 deletions

diff --git a/drivers/isdn/hisax/isurf.c b/drivers/isdn/hisax/isurf.c
deleted file mode 100644
index 53e299be4304..000000000000
--- a/drivers/isdn/hisax/isurf.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/* $Id: isurf.c,v 1.12.2.4 2004/01/13 21:46:03 keil Exp $
- *
- * low level stuff for Siemens I-Surf/I-Talk cards
- *
- * Author       Karsten Keil
- * Copyright    by Karsten Keil      <keil@isdn4linux.de>
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-
-#include <linux/init.h>
-#include "hisax.h"
-#include "isac.h"
-#include "isar.h"
-#include "isdnl1.h"
-#include <linux/isapnp.h>
-
-static const char *ISurf_revision = "$Revision: 1.12.2.4 $";
-
-#define byteout(addr, val) outb(val, addr)
-#define bytein(addr) inb(addr)
-
-#define ISURF_ISAR_RESET	1
-#define ISURF_ISAC_RESET	2
-#define ISURF_ISAR_EA		4
-#define ISURF_ARCOFI_RESET	8
-#define ISURF_RESET (ISURF_ISAR_RESET | ISURF_ISAC_RESET | ISURF_ARCOFI_RESET)
-
-#define ISURF_ISAR_OFFSET	0
-#define ISURF_ISAC_OFFSET	0x100
-#define ISURF_IOMEM_SIZE	0x400
-/* Interface functions */
-
-static u_char
-ReadISAC(struct IsdnCardState *cs, u_char offset)
-{
-	return (readb(cs->hw.isurf.isac + offset));
-}
-
-static void
-WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
-{
-	writeb(value, cs->hw.isurf.isac + offset); mb();
-}
-
-static void
-ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
-{
-	register int i;
-	for (i = 0; i < size; i++)
-		data[i] = readb(cs->hw.isurf.isac);
-}
-
-static void
-WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
-{
-	register int i;
-	for (i = 0; i < size; i++) {
-		writeb(data[i], cs->hw.isurf.isac); mb();
-	}
-}
-
-/* ISAR access routines
- * mode = 0 access with IRQ on
- * mode = 1 access with IRQ off
- * mode = 2 access with IRQ off and using last offset
- */
-
-static u_char
-ReadISAR(struct IsdnCardState *cs, int mode, u_char offset)
-{
-	return (readb(cs->hw.isurf.isar + offset));
-}
-
-static void
-WriteISAR(struct IsdnCardState *cs, int mode, u_char offset, u_char value)
-{
-	writeb(value, cs->hw.isurf.isar + offset); mb();
-}
-
-static irqreturn_t
-isurf_interrupt(int intno, void *dev_id)
-{
-	struct IsdnCardState *cs = dev_id;
-	u_char val;
-	int cnt = 5;
-	u_long flags;
-
-	spin_lock_irqsave(&cs->lock, flags);
-	val = readb(cs->hw.isurf.isar + ISAR_IRQBIT);
-Start_ISAR:
-	if (val & ISAR_IRQSTA)
-		isar_int_main(cs);
-	val = readb(cs->hw.isurf.isac + ISAC_ISTA);
-Start_ISAC:
-	if (val)
-		isac_interrupt(cs, val);
-	val = readb(cs->hw.isurf.isar + ISAR_IRQBIT);
-	if ((val & ISAR_IRQSTA) && --cnt) {
-		if (cs->debug & L1_DEB_HSCX)
-			debugl1(cs, "ISAR IntStat after IntRoutine");
-		goto Start_ISAR;
-	}
-	val = readb(cs->hw.isurf.isac + ISAC_ISTA);
-	if (val && --cnt) {
-		if (cs->debug & L1_DEB_ISAC)
-			debugl1(cs, "ISAC IntStat after IntRoutine");
-		goto Start_ISAC;
-	}
-	if (!cnt)
-		printk(KERN_WARNING "ISurf IRQ LOOP\n");
-
-	writeb(0, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
-	writeb(0xFF, cs->hw.isurf.isac + ISAC_MASK); mb();
-	writeb(0, cs->hw.isurf.isac + ISAC_MASK); mb();
-	writeb(ISAR_IRQMSK, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
-	spin_unlock_irqrestore(&cs->lock, flags);
-	return IRQ_HANDLED;
-}
-
-static void
-release_io_isurf(struct IsdnCardState *cs)
-{
-	release_region(cs->hw.isurf.reset, 1);
-	iounmap(cs->hw.isurf.isar);
-	release_mem_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
-}
-
-static void
-reset_isurf(struct IsdnCardState *cs, u_char chips)
-{
-	printk(KERN_INFO "ISurf: resetting card\n");
-
-	byteout(cs->hw.isurf.reset, chips); /* Reset On */
-	mdelay(10);
-	byteout(cs->hw.isurf.reset, ISURF_ISAR_EA); /* Reset Off */
-	mdelay(10);
-}
-
-static int
-ISurf_card_msg(struct IsdnCardState *cs, int mt, void *arg)
-{
-	u_long flags;
-
-	switch (mt) {
-	case CARD_RESET:
-		spin_lock_irqsave(&cs->lock, flags);
-		reset_isurf(cs, ISURF_RESET);
-		spin_unlock_irqrestore(&cs->lock, flags);
-		return (0);
-	case CARD_RELEASE:
-		release_io_isurf(cs);
-		return (0);
-	case CARD_INIT:
-		spin_lock_irqsave(&cs->lock, flags);
-		reset_isurf(cs, ISURF_RESET);
-		clear_pending_isac_ints(cs);
-		writeb(0, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
-		initisac(cs);
-		initisar(cs);
-		/* Reenable ISAC IRQ */
-		cs->writeisac(cs, ISAC_MASK, 0);
-		/* RESET Receiver and Transmitter */
-		cs->writeisac(cs, ISAC_CMDR, 0x41);
-		spin_unlock_irqrestore(&cs->lock, flags);
-		return (0);
-	case CARD_TEST:
-		return (0);
-	}
-	return (0);
-}
-
-static int
-isurf_auxcmd(struct IsdnCardState *cs, isdn_ctrl *ic) {
-	int ret;
-	u_long flags;
-
-	if ((ic->command == ISDN_CMD_IOCTL) && (ic->arg == 9)) {
-		ret = isar_auxcmd(cs, ic);
-		spin_lock_irqsave(&cs->lock, flags);
-		if (!ret) {
-			reset_isurf(cs, ISURF_ISAR_EA | ISURF_ISAC_RESET |
-				    ISURF_ARCOFI_RESET);
-			initisac(cs);
-			cs->writeisac(cs, ISAC_MASK, 0);
-			cs->writeisac(cs, ISAC_CMDR, 0x41);
-		}
-		spin_unlock_irqrestore(&cs->lock, flags);
-		return (ret);
-	}
-	return (isar_auxcmd(cs, ic));
-}
-
-#ifdef __ISAPNP__
-static struct pnp_card *pnp_c = NULL;
-#endif
-
-int setup_isurf(struct IsdnCard *card)
-{
-	int ver;
-	struct IsdnCardState *cs = card->cs;
-	char tmp[64];
-
-	strcpy(tmp, ISurf_revision);
-	printk(KERN_INFO "HiSax: ISurf driver Rev. %s\n", HiSax_getrev(tmp));
-
-	if (cs->typ != ISDN_CTYPE_ISURF)
-		return (0);
-	if (card->para[1] && card->para[2]) {
-		cs->hw.isurf.reset = card->para[1];
-		cs->hw.isurf.phymem = card->para[2];
-		cs->irq = card->para[0];
-	} else {
-#ifdef __ISAPNP__
-		if (isapnp_present()) {
-			struct pnp_dev *pnp_d = NULL;
-			int err;
-
-			cs->subtyp = 0;
-			if ((pnp_c = pnp_find_card(
-				     ISAPNP_VENDOR('S', 'I', 'E'),
-				     ISAPNP_FUNCTION(0x0010), pnp_c))) {
-				if (!(pnp_d = pnp_find_dev(pnp_c,
-							   ISAPNP_VENDOR('S', 'I', 'E'),
-							   ISAPNP_FUNCTION(0x0010), pnp_d))) {
-					printk(KERN_ERR "ISurfPnP: PnP error card found, no device\n");
-					return (0);
-				}
-				pnp_disable_dev(pnp_d);
-				err = pnp_activate_dev(pnp_d);
-				if (err < 0) {
-					pr_warn("%s: pnp_activate_dev ret=%d\n",
-						__func__, err);
-					return 0;
-				}
-				cs->hw.isurf.reset = pnp_port_start(pnp_d, 0);
-				cs->hw.isurf.phymem = pnp_mem_start(pnp_d, 1);
-				cs->irq = pnp_irq(pnp_d, 0);
-				if (cs->irq == -1 || !cs->hw.isurf.reset || !cs->hw.isurf.phymem) {
-					printk(KERN_ERR "ISurfPnP:some resources are missing %d/%x/%lx\n",
-					       cs->irq, cs->hw.isurf.reset, cs->hw.isurf.phymem);
-					pnp_disable_dev(pnp_d);
-					return (0);
-				}
-			} else {
-				printk(KERN_INFO "ISurfPnP: no ISAPnP card found\n");
-				return (0);
-			}
-		} else {
-			printk(KERN_INFO "ISurfPnP: no ISAPnP bus found\n");
-			return (0);
-		}
-#else
-		printk(KERN_WARNING "HiSax: Siemens I-Surf port/mem not set\n");
-		return (0);
-#endif
-	}
-	if (!request_region(cs->hw.isurf.reset, 1, "isurf isdn")) {
-		printk(KERN_WARNING
-		       "HiSax: Siemens I-Surf config port %x already in use\n",
-		       cs->hw.isurf.reset);
-		return (0);
-	}
-	if (!request_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE, "isurf iomem")) {
-		printk(KERN_WARNING "HiSax: Siemens I-Surf memory region "
-		       "%lx-%lx already in use\n",
-		       cs->hw.isurf.phymem,
-		       cs->hw.isurf.phymem + ISURF_IOMEM_SIZE);
-		release_region(cs->hw.isurf.reset, 1);
-		return (0);
-	}
-	cs->hw.isurf.isar = ioremap(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
-	cs->hw.isurf.isac = cs->hw.isurf.isar + ISURF_ISAC_OFFSET;
-	printk(KERN_INFO
-	       "ISurf: defined at 0x%x 0x%lx IRQ %d\n",
-	       cs->hw.isurf.reset,
-	       cs->hw.isurf.phymem,
-	       cs->irq);
-
-	setup_isac(cs);
-	cs->cardmsg = &ISurf_card_msg;
-	cs->irq_func = &isurf_interrupt;
-	cs->auxcmd = &isurf_auxcmd;
-	cs->readisac = &ReadISAC;
-	cs->writeisac = &WriteISAC;
-	cs->readisacfifo = &ReadISACfifo;
-	cs->writeisacfifo = &WriteISACfifo;
-	cs->bcs[0].hw.isar.reg = &cs->hw.isurf.isar_r;
-	cs->bcs[1].hw.isar.reg = &cs->hw.isurf.isar_r;
-	test_and_set_bit(HW_ISAR, &cs->HW_Flags);
-	ISACVersion(cs, "ISurf:");
-	cs->BC_Read_Reg = &ReadISAR;
-	cs->BC_Write_Reg = &WriteISAR;
-	cs->BC_Send_Data = &isar_fill_fifo;
-	ver = ISARVersion(cs, "ISurf:");
-	if (ver < 0) {
-		printk(KERN_WARNING
-		       "ISurf: wrong ISAR version (ret = %d)\n", ver);
-		release_io_isurf(cs);
-		return (0);
-	}
-	return (1);
-}