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, 261 deletions

diff --git a/drivers/isdn/hisax/hfcscard.c b/drivers/isdn/hisax/hfcscard.c
deleted file mode 100644
index 91b5219499ca..000000000000
--- a/drivers/isdn/hisax/hfcscard.c
+++ /dev/null
@@ -1,261 +0,0 @@
-/* $Id: hfcscard.c,v 1.10.2.4 2004/01/14 16:04:48 keil Exp $
- *
- * low level stuff for hfcs based cards (Teles3c, ACER P10)
- *
- * 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 <linux/isapnp.h>
-#include "hisax.h"
-#include "hfc_2bds0.h"
-#include "isdnl1.h"
-
-static const char *hfcs_revision = "$Revision: 1.10.2.4 $";
-
-static irqreturn_t
-hfcs_interrupt(int intno, void *dev_id)
-{
-	struct IsdnCardState *cs = dev_id;
-	u_char val, stat;
-	u_long flags;
-
-	spin_lock_irqsave(&cs->lock, flags);
-	if ((HFCD_ANYINT | HFCD_BUSY_NBUSY) &
-	    (stat = cs->BC_Read_Reg(cs, HFCD_DATA, HFCD_STAT))) {
-		val = cs->BC_Read_Reg(cs, HFCD_DATA, HFCD_INT_S1);
-		if (cs->debug & L1_DEB_ISAC)
-			debugl1(cs, "HFCS: stat(%02x) s1(%02x)", stat, val);
-		hfc2bds0_interrupt(cs, val);
-	} else {
-		if (cs->debug & L1_DEB_ISAC)
-			debugl1(cs, "HFCS: irq_no_irq stat(%02x)", stat);
-	}
-	spin_unlock_irqrestore(&cs->lock, flags);
-	return IRQ_HANDLED;
-}
-
-static void
-hfcs_Timer(struct timer_list *t)
-{
-	struct IsdnCardState *cs = from_timer(cs, t, hw.hfcD.timer);
-	cs->hw.hfcD.timer.expires = jiffies + 75;
-	/* WD RESET */
-/*	WriteReg(cs, HFCD_DATA, HFCD_CTMT, cs->hw.hfcD.ctmt | 0x80);
-	add_timer(&cs->hw.hfcD.timer);
-*/
-}
-
-static void
-release_io_hfcs(struct IsdnCardState *cs)
-{
-	release2bds0(cs);
-	del_timer(&cs->hw.hfcD.timer);
-	if (cs->hw.hfcD.addr)
-		release_region(cs->hw.hfcD.addr, 2);
-}
-
-static void
-reset_hfcs(struct IsdnCardState *cs)
-{
-	printk(KERN_INFO "HFCS: resetting card\n");
-	cs->hw.hfcD.cirm = HFCD_RESET;
-	if (cs->typ == ISDN_CTYPE_TELES3C)
-		cs->hw.hfcD.cirm |= HFCD_MEM8K;
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_CIRM, cs->hw.hfcD.cirm);	/* Reset On */
-	mdelay(10);
-	cs->hw.hfcD.cirm = 0;
-	if (cs->typ == ISDN_CTYPE_TELES3C)
-		cs->hw.hfcD.cirm |= HFCD_MEM8K;
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_CIRM, cs->hw.hfcD.cirm);	/* Reset Off */
-	mdelay(10);
-	if (cs->typ == ISDN_CTYPE_TELES3C)
-		cs->hw.hfcD.cirm |= HFCD_INTB;
-	else if (cs->typ == ISDN_CTYPE_ACERP10)
-		cs->hw.hfcD.cirm |= HFCD_INTA;
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_CIRM, cs->hw.hfcD.cirm);
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_CLKDEL, 0x0e);
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_TEST, HFCD_AUTO_AWAKE); /* S/T Auto awake */
-	cs->hw.hfcD.ctmt = HFCD_TIM25 | HFCD_AUTO_TIMER;
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_CTMT, cs->hw.hfcD.ctmt);
-	cs->hw.hfcD.int_m2 = HFCD_IRQ_ENABLE;
-	cs->hw.hfcD.int_m1 = HFCD_INTS_B1TRANS | HFCD_INTS_B2TRANS |
-		HFCD_INTS_DTRANS | HFCD_INTS_B1REC | HFCD_INTS_B2REC |
-		HFCD_INTS_DREC | HFCD_INTS_L1STATE;
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_INT_M1, cs->hw.hfcD.int_m1);
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_INT_M2, cs->hw.hfcD.int_m2);
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_STATES, HFCD_LOAD_STATE | 2); /* HFC ST 2 */
-	udelay(10);
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_STATES, 2); /* HFC ST 2 */
-	cs->hw.hfcD.mst_m = HFCD_MASTER;
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_MST_MODE, cs->hw.hfcD.mst_m); /* HFC Master */
-	cs->hw.hfcD.sctrl = 0;
-	cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_SCTRL, cs->hw.hfcD.sctrl);
-}
-
-static int
-hfcs_card_msg(struct IsdnCardState *cs, int mt, void *arg)
-{
-	u_long flags;
-	int delay;
-
-	if (cs->debug & L1_DEB_ISAC)
-		debugl1(cs, "HFCS: card_msg %x", mt);
-	switch (mt) {
-	case CARD_RESET:
-		spin_lock_irqsave(&cs->lock, flags);
-		reset_hfcs(cs);
-		spin_unlock_irqrestore(&cs->lock, flags);
-		return (0);
-	case CARD_RELEASE:
-		release_io_hfcs(cs);
-		return (0);
-	case CARD_INIT:
-		delay = (75 * HZ) / 100 + 1;
-		mod_timer(&cs->hw.hfcD.timer, jiffies + delay);
-		spin_lock_irqsave(&cs->lock, flags);
-		reset_hfcs(cs);
-		init2bds0(cs);
-		spin_unlock_irqrestore(&cs->lock, flags);
-		delay = (80 * HZ) / 1000 + 1;
-		msleep(80);
-		spin_lock_irqsave(&cs->lock, flags);
-		cs->hw.hfcD.ctmt |= HFCD_TIM800;
-		cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_CTMT, cs->hw.hfcD.ctmt);
-		cs->BC_Write_Reg(cs, HFCD_DATA, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
-		spin_unlock_irqrestore(&cs->lock, flags);
-		return (0);
-	case CARD_TEST:
-		return (0);
-	}
-	return (0);
-}
-
-#ifdef __ISAPNP__
-static struct isapnp_device_id hfc_ids[] = {
-	{ ISAPNP_VENDOR('A', 'N', 'X'), ISAPNP_FUNCTION(0x1114),
-	  ISAPNP_VENDOR('A', 'N', 'X'), ISAPNP_FUNCTION(0x1114),
-	  (unsigned long) "Acer P10" },
-	{ ISAPNP_VENDOR('B', 'I', 'L'), ISAPNP_FUNCTION(0x0002),
-	  ISAPNP_VENDOR('B', 'I', 'L'), ISAPNP_FUNCTION(0x0002),
-	  (unsigned long) "Billion 2" },
-	{ ISAPNP_VENDOR('B', 'I', 'L'), ISAPNP_FUNCTION(0x0001),
-	  ISAPNP_VENDOR('B', 'I', 'L'), ISAPNP_FUNCTION(0x0001),
-	  (unsigned long) "Billion 1" },
-	{ ISAPNP_VENDOR('T', 'A', 'G'), ISAPNP_FUNCTION(0x7410),
-	  ISAPNP_VENDOR('T', 'A', 'G'), ISAPNP_FUNCTION(0x7410),
-	  (unsigned long) "IStar PnP" },
-	{ ISAPNP_VENDOR('T', 'A', 'G'), ISAPNP_FUNCTION(0x2610),
-	  ISAPNP_VENDOR('T', 'A', 'G'), ISAPNP_FUNCTION(0x2610),
-	  (unsigned long) "Teles 16.3c" },
-	{ ISAPNP_VENDOR('S', 'F', 'M'), ISAPNP_FUNCTION(0x0001),
-	  ISAPNP_VENDOR('S', 'F', 'M'), ISAPNP_FUNCTION(0x0001),
-	  (unsigned long) "Tornado Tipa C" },
-	{ ISAPNP_VENDOR('K', 'Y', 'E'), ISAPNP_FUNCTION(0x0001),
-	  ISAPNP_VENDOR('K', 'Y', 'E'), ISAPNP_FUNCTION(0x0001),
-	  (unsigned long) "Genius Speed Surfer" },
-	{ 0, }
-};
-
-static struct isapnp_device_id *ipid = &hfc_ids[0];
-static struct pnp_card *pnp_c = NULL;
-#endif
-
-int setup_hfcs(struct IsdnCard *card)
-{
-	struct IsdnCardState *cs = card->cs;
-	char tmp[64];
-
-	strcpy(tmp, hfcs_revision);
-	printk(KERN_INFO "HiSax: HFC-S driver Rev. %s\n", HiSax_getrev(tmp));
-
-#ifdef __ISAPNP__
-	if (!card->para[1] && isapnp_present()) {
-		struct pnp_dev *pnp_d;
-		while (ipid->card_vendor) {
-			if ((pnp_c = pnp_find_card(ipid->card_vendor,
-						   ipid->card_device, pnp_c))) {
-				pnp_d = NULL;
-				if ((pnp_d = pnp_find_dev(pnp_c,
-							  ipid->vendor, ipid->function, pnp_d))) {
-					int err;
-
-					printk(KERN_INFO "HiSax: %s detected\n",
-					       (char *)ipid->driver_data);
-					pnp_disable_dev(pnp_d);
-					err = pnp_activate_dev(pnp_d);
-					if (err < 0) {
-						printk(KERN_WARNING "%s: pnp_activate_dev ret(%d)\n",
-						       __func__, err);
-						return (0);
-					}
-					card->para[1] = pnp_port_start(pnp_d, 0);
-					card->para[0] = pnp_irq(pnp_d, 0);
-					if (card->para[0] == -1 || !card->para[1]) {
-						printk(KERN_ERR "HFC PnP:some resources are missing %ld/%lx\n",
-						       card->para[0], card->para[1]);
-						pnp_disable_dev(pnp_d);
-						return (0);
-					}
-					break;
-				} else {
-					printk(KERN_ERR "HFC PnP: PnP error card found, no device\n");
-				}
-			}
-			ipid++;
-			pnp_c = NULL;
-		}
-		if (!ipid->card_vendor) {
-			printk(KERN_INFO "HFC PnP: no ISAPnP card found\n");
-			return (0);
-		}
-	}
-#endif
-	cs->hw.hfcD.addr = card->para[1] & 0xfffe;
-	cs->irq = card->para[0];
-	cs->hw.hfcD.cip = 0;
-	cs->hw.hfcD.int_s1 = 0;
-	cs->hw.hfcD.send = NULL;
-	cs->bcs[0].hw.hfc.send = NULL;
-	cs->bcs[1].hw.hfc.send = NULL;
-	cs->hw.hfcD.dfifosize = 512;
-	cs->dc.hfcd.ph_state = 0;
-	cs->hw.hfcD.fifo = 255;
-	if (cs->typ == ISDN_CTYPE_TELES3C) {
-		cs->hw.hfcD.bfifosize = 1024 + 512;
-	} else if (cs->typ == ISDN_CTYPE_ACERP10) {
-		cs->hw.hfcD.bfifosize = 7 * 1024 + 512;
-	} else
-		return (0);
-	if (!request_region(cs->hw.hfcD.addr, 2, "HFCS isdn")) {
-		printk(KERN_WARNING
-		       "HiSax: %s config port %x-%x already in use\n",
-		       CardType[card->typ],
-		       cs->hw.hfcD.addr,
-		       cs->hw.hfcD.addr + 2);
-		return (0);
-	}
-	printk(KERN_INFO
-	       "HFCS: defined at 0x%x IRQ %d HZ %d\n",
-	       cs->hw.hfcD.addr,
-	       cs->irq, HZ);
-	if (cs->typ == ISDN_CTYPE_TELES3C) {
-		/* Teles 16.3c IO ADR is 0x200 | YY0U (YY Bit 15/14 address) */
-		outb(0x00, cs->hw.hfcD.addr);
-		outb(0x56, cs->hw.hfcD.addr | 1);
-	} else if (cs->typ == ISDN_CTYPE_ACERP10) {
-		/* Acer P10 IO ADR is 0x300 */
-		outb(0x00, cs->hw.hfcD.addr);
-		outb(0x57, cs->hw.hfcD.addr | 1);
-	}
-	set_cs_func(cs);
-	timer_setup(&cs->hw.hfcD.timer, hfcs_Timer, 0);
-	cs->cardmsg = &hfcs_card_msg;
-	cs->irq_func = &hfcs_interrupt;
-	return (1);
-}