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, 659 deletions

diff --git a/drivers/isdn/hisax/elsa_ser.c b/drivers/isdn/hisax/elsa_ser.c
deleted file mode 100644
index 999effd7a276..000000000000
--- a/drivers/isdn/hisax/elsa_ser.c
+++ /dev/null
@@ -1,659 +0,0 @@
-/* $Id: elsa_ser.c,v 2.14.2.3 2004/02/11 13:21:33 keil Exp $
- *
- * stuff for the serial modem on ELSA cards
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-
-#include <linux/serial.h>
-#include <linux/serial_reg.h>
-#include <linux/slab.h>
-
-#define MAX_MODEM_BUF	256
-#define WAKEUP_CHARS	(MAX_MODEM_BUF / 2)
-#define RS_ISR_PASS_LIMIT 256
-#define BASE_BAUD (1843200 / 16)
-
-//#define SERIAL_DEBUG_OPEN 1
-//#define SERIAL_DEBUG_INTR 1
-//#define SERIAL_DEBUG_FLOW 1
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_REG
-//#define SERIAL_DEBUG_REG 1
-
-#ifdef SERIAL_DEBUG_REG
-static u_char deb[32];
-const char *ModemIn[] = {"RBR", "IER", "IIR", "LCR", "MCR", "LSR", "MSR", "SCR"};
-const char *ModemOut[] = {"THR", "IER", "FCR", "LCR", "MCR", "LSR", "MSR", "SCR"};
-#endif
-
-static char *MInit_1 = "AT&F&C1E0&D2\r\0";
-static char *MInit_2 = "ATL2M1S64=13\r\0";
-static char *MInit_3 = "AT+FCLASS=0\r\0";
-static char *MInit_4 = "ATV1S2=128X1\r\0";
-static char *MInit_5 = "AT\\V8\\N3\r\0";
-static char *MInit_6 = "ATL0M0&G0%E1\r\0";
-static char *MInit_7 = "AT%L1%M0%C3\r\0";
-
-static char *MInit_speed28800 = "AT%G0%B28800\r\0";
-
-static char *MInit_dialout = "ATs7=60 x1 d\r\0";
-static char *MInit_dialin = "ATs7=60 x1 a\r\0";
-
-
-static inline unsigned int serial_in(struct IsdnCardState *cs, int offset)
-{
-#ifdef SERIAL_DEBUG_REG
-	u_int val = inb(cs->hw.elsa.base + 8 + offset);
-	debugl1(cs, "in   %s %02x", ModemIn[offset], val);
-	return (val);
-#else
-	return inb(cs->hw.elsa.base + 8 + offset);
-#endif
-}
-
-static inline unsigned int serial_inp(struct IsdnCardState *cs, int offset)
-{
-#ifdef SERIAL_DEBUG_REG
-#ifdef ELSA_SERIAL_NOPAUSE_IO
-	u_int val = inb(cs->hw.elsa.base + 8 + offset);
-	debugl1(cs, "inp  %s %02x", ModemIn[offset], val);
-#else
-	u_int val = inb_p(cs->hw.elsa.base + 8 + offset);
-	debugl1(cs, "inP  %s %02x", ModemIn[offset], val);
-#endif
-	return (val);
-#else
-#ifdef ELSA_SERIAL_NOPAUSE_IO
-	return inb(cs->hw.elsa.base + 8 + offset);
-#else
-	return inb_p(cs->hw.elsa.base + 8 + offset);
-#endif
-#endif
-}
-
-static inline void serial_out(struct IsdnCardState *cs, int offset, int value)
-{
-#ifdef SERIAL_DEBUG_REG
-	debugl1(cs, "out  %s %02x", ModemOut[offset], value);
-#endif
-	outb(value, cs->hw.elsa.base + 8 + offset);
-}
-
-static inline void serial_outp(struct IsdnCardState *cs, int offset,
-			       int value)
-{
-#ifdef SERIAL_DEBUG_REG
-#ifdef ELSA_SERIAL_NOPAUSE_IO
-	debugl1(cs, "outp %s %02x", ModemOut[offset], value);
-#else
-	debugl1(cs, "outP %s %02x", ModemOut[offset], value);
-#endif
-#endif
-#ifdef ELSA_SERIAL_NOPAUSE_IO
-	outb(value, cs->hw.elsa.base + 8 + offset);
-#else
-	outb_p(value, cs->hw.elsa.base + 8 + offset);
-#endif
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(struct IsdnCardState *cs, int baud)
-{
-	int	quot = 0, baud_base;
-	unsigned cval, fcr = 0;
-
-
-	/* byte size and parity */
-	cval = 0x03;
-	/* Determine divisor based on baud rate */
-	baud_base = BASE_BAUD;
-	quot = baud_base / baud;
-	/* If the quotient is ever zero, default to 9600 bps */
-	if (!quot)
-		quot = baud_base / 9600;
-
-	/* Set up FIFO's */
-	if ((baud_base / quot) < 2400)
-		fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
-	else
-		fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
-	serial_outp(cs, UART_FCR, fcr);
-	/* CTS flow control flag and modem status interrupts */
-	cs->hw.elsa.IER &= ~UART_IER_MSI;
-	cs->hw.elsa.IER |= UART_IER_MSI;
-	serial_outp(cs, UART_IER, cs->hw.elsa.IER);
-
-	debugl1(cs, "modem quot=0x%x", quot);
-	serial_outp(cs, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
-	serial_outp(cs, UART_DLL, quot & 0xff);		/* LS of divisor */
-	serial_outp(cs, UART_DLM, quot >> 8);		/* MS of divisor */
-	serial_outp(cs, UART_LCR, cval);		/* reset DLAB */
-	serial_inp(cs, UART_RX);
-}
-
-static int mstartup(struct IsdnCardState *cs)
-{
-	int retval = 0;
-
-	/*
-	 * Clear the FIFO buffers and disable them
-	 * (they will be reenabled in change_speed())
-	 */
-	serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
-
-	/*
-	 * At this point there's no way the LSR could still be 0xFF;
-	 * if it is, then bail out, because there's likely no UART
-	 * here.
-	 */
-	if (serial_inp(cs, UART_LSR) == 0xff) {
-		retval = -ENODEV;
-		goto errout;
-	}
-
-	/*
-	 * Clear the interrupt registers.
-	 */
-	(void) serial_inp(cs, UART_RX);
-	(void) serial_inp(cs, UART_IIR);
-	(void) serial_inp(cs, UART_MSR);
-
-	/*
-	 * Now, initialize the UART
-	 */
-	serial_outp(cs, UART_LCR, UART_LCR_WLEN8);	/* reset DLAB */
-
-	cs->hw.elsa.MCR = 0;
-	cs->hw.elsa.MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
-	serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
-
-	/*
-	 * Finally, enable interrupts
-	 */
-	cs->hw.elsa.IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
-	serial_outp(cs, UART_IER, cs->hw.elsa.IER);	/* enable interrupts */
-
-	/*
-	 * And clear the interrupt registers again for luck.
-	 */
-	(void)serial_inp(cs, UART_LSR);
-	(void)serial_inp(cs, UART_RX);
-	(void)serial_inp(cs, UART_IIR);
-	(void)serial_inp(cs, UART_MSR);
-
-	cs->hw.elsa.transcnt = cs->hw.elsa.transp = 0;
-	cs->hw.elsa.rcvcnt = cs->hw.elsa.rcvp = 0;
-
-	/*
-	 * and set the speed of the serial port
-	 */
-	change_speed(cs, BASE_BAUD);
-	cs->hw.elsa.MFlag = 1;
-errout:
-	return retval;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void mshutdown(struct IsdnCardState *cs)
-{
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk(KERN_DEBUG"Shutting down serial ....");
-#endif
-
-	/*
-	 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
-	 * here so the queue might never be waken up
-	 */
-
-	cs->hw.elsa.IER = 0;
-	serial_outp(cs, UART_IER, 0x00);	/* disable all intrs */
-	cs->hw.elsa.MCR &= ~UART_MCR_OUT2;
-
-	/* disable break condition */
-	serial_outp(cs, UART_LCR, serial_inp(cs, UART_LCR) & ~UART_LCR_SBC);
-
-	cs->hw.elsa.MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
-	serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
-
-	/* disable FIFO's */
-	serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
-	serial_inp(cs, UART_RX);    /* read data port to reset things */
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk(" done\n");
-#endif
-}
-
-static inline int
-write_modem(struct BCState *bcs) {
-	int ret = 0;
-	struct IsdnCardState *cs = bcs->cs;
-	int count, len, fp;
-
-	if (!bcs->tx_skb)
-		return 0;
-	if (bcs->tx_skb->len <= 0)
-		return 0;
-	len = bcs->tx_skb->len;
-	if (len > MAX_MODEM_BUF - cs->hw.elsa.transcnt)
-		len = MAX_MODEM_BUF - cs->hw.elsa.transcnt;
-	fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
-	fp &= (MAX_MODEM_BUF - 1);
-	count = len;
-	if (count > MAX_MODEM_BUF - fp) {
-		count = MAX_MODEM_BUF - fp;
-		skb_copy_from_linear_data(bcs->tx_skb,
-					  cs->hw.elsa.transbuf + fp, count);
-		skb_pull(bcs->tx_skb, count);
-		cs->hw.elsa.transcnt += count;
-		ret = count;
-		count = len - count;
-		fp = 0;
-	}
-	skb_copy_from_linear_data(bcs->tx_skb,
-				  cs->hw.elsa.transbuf + fp, count);
-	skb_pull(bcs->tx_skb, count);
-	cs->hw.elsa.transcnt += count;
-	ret += count;
-
-	if (cs->hw.elsa.transcnt &&
-	    !(cs->hw.elsa.IER & UART_IER_THRI)) {
-		cs->hw.elsa.IER |= UART_IER_THRI;
-		serial_outp(cs, UART_IER, cs->hw.elsa.IER);
-	}
-	return (ret);
-}
-
-static inline void
-modem_fill(struct BCState *bcs) {
-
-	if (bcs->tx_skb) {
-		if (bcs->tx_skb->len) {
-			write_modem(bcs);
-			return;
-		} else {
-			if (test_bit(FLG_LLI_L1WAKEUP, &bcs->st->lli.flag) &&
-			    (PACKET_NOACK != bcs->tx_skb->pkt_type)) {
-				u_long	flags;
-				spin_lock_irqsave(&bcs->aclock, flags);
-				bcs->ackcnt += bcs->hw.hscx.count;
-				spin_unlock_irqrestore(&bcs->aclock, flags);
-				schedule_event(bcs, B_ACKPENDING);
-			}
-			dev_kfree_skb_any(bcs->tx_skb);
-			bcs->tx_skb = NULL;
-		}
-	}
-	if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
-		bcs->hw.hscx.count = 0;
-		test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
-		write_modem(bcs);
-	} else {
-		test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
-		schedule_event(bcs, B_XMTBUFREADY);
-	}
-}
-
-static inline void receive_chars(struct IsdnCardState *cs,
-				 int *status)
-{
-	unsigned char ch;
-	struct sk_buff *skb;
-
-	do {
-		ch = serial_in(cs, UART_RX);
-		if (cs->hw.elsa.rcvcnt >= MAX_MODEM_BUF)
-			break;
-		cs->hw.elsa.rcvbuf[cs->hw.elsa.rcvcnt++] = ch;
-#ifdef SERIAL_DEBUG_INTR
-		printk("DR%02x:%02x...", ch, *status);
-#endif
-		if (*status & (UART_LSR_BI | UART_LSR_PE |
-			       UART_LSR_FE | UART_LSR_OE)) {
-
-#ifdef SERIAL_DEBUG_INTR
-			printk("handling exept....");
-#endif
-		}
-		*status = serial_inp(cs, UART_LSR);
-	} while (*status & UART_LSR_DR);
-	if (cs->hw.elsa.MFlag == 2) {
-		if (!(skb = dev_alloc_skb(cs->hw.elsa.rcvcnt)))
-			printk(KERN_WARNING "ElsaSER: receive out of memory\n");
-		else {
-			skb_put_data(skb, cs->hw.elsa.rcvbuf,
-				     cs->hw.elsa.rcvcnt);
-			skb_queue_tail(&cs->hw.elsa.bcs->rqueue, skb);
-		}
-		schedule_event(cs->hw.elsa.bcs, B_RCVBUFREADY);
-	} else {
-		char tmp[128];
-		char *t = tmp;
-
-		t += sprintf(t, "modem read cnt %d", cs->hw.elsa.rcvcnt);
-		QuickHex(t, cs->hw.elsa.rcvbuf, cs->hw.elsa.rcvcnt);
-		debugl1(cs, "%s", tmp);
-	}
-	cs->hw.elsa.rcvcnt = 0;
-}
-
-static inline void transmit_chars(struct IsdnCardState *cs, int *intr_done)
-{
-	int count;
-
-	debugl1(cs, "transmit_chars: p(%x) cnt(%x)", cs->hw.elsa.transp,
-		cs->hw.elsa.transcnt);
-
-	if (cs->hw.elsa.transcnt <= 0) {
-		cs->hw.elsa.IER &= ~UART_IER_THRI;
-		serial_out(cs, UART_IER, cs->hw.elsa.IER);
-		return;
-	}
-	count = 16;
-	do {
-		serial_outp(cs, UART_TX, cs->hw.elsa.transbuf[cs->hw.elsa.transp++]);
-		if (cs->hw.elsa.transp >= MAX_MODEM_BUF)
-			cs->hw.elsa.transp = 0;
-		if (--cs->hw.elsa.transcnt <= 0)
-			break;
-	} while (--count > 0);
-	if ((cs->hw.elsa.transcnt < WAKEUP_CHARS) && (cs->hw.elsa.MFlag == 2))
-		modem_fill(cs->hw.elsa.bcs);
-
-#ifdef SERIAL_DEBUG_INTR
-	printk("THRE...");
-#endif
-	if (intr_done)
-		*intr_done = 0;
-	if (cs->hw.elsa.transcnt <= 0) {
-		cs->hw.elsa.IER &= ~UART_IER_THRI;
-		serial_outp(cs, UART_IER, cs->hw.elsa.IER);
-	}
-}
-
-
-static void rs_interrupt_elsa(struct IsdnCardState *cs)
-{
-	int status, iir, msr;
-	int pass_counter = 0;
-
-#ifdef SERIAL_DEBUG_INTR
-	printk(KERN_DEBUG "rs_interrupt_single(%d)...", cs->irq);
-#endif
-
-	do {
-		status = serial_inp(cs, UART_LSR);
-		debugl1(cs, "rs LSR %02x", status);
-#ifdef SERIAL_DEBUG_INTR
-		printk("status = %x...", status);
-#endif
-		if (status & UART_LSR_DR)
-			receive_chars(cs, &status);
-		if (status & UART_LSR_THRE)
-			transmit_chars(cs, NULL);
-		if (pass_counter++ > RS_ISR_PASS_LIMIT) {
-			printk("rs_single loop break.\n");
-			break;
-		}
-		iir = serial_inp(cs, UART_IIR);
-		debugl1(cs, "rs IIR %02x", iir);
-		if ((iir & 0xf) == 0) {
-			msr = serial_inp(cs, UART_MSR);
-			debugl1(cs, "rs MSR %02x", msr);
-		}
-	} while (!(iir & UART_IIR_NO_INT));
-#ifdef SERIAL_DEBUG_INTR
-	printk("end.\n");
-#endif
-}
-
-extern int open_hscxstate(struct IsdnCardState *cs, struct BCState *bcs);
-extern void modehscx(struct BCState *bcs, int mode, int bc);
-extern void hscx_l2l1(struct PStack *st, int pr, void *arg);
-
-static void
-close_elsastate(struct BCState *bcs)
-{
-	modehscx(bcs, 0, bcs->channel);
-	if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
-		if (bcs->hw.hscx.rcvbuf) {
-			if (bcs->mode != L1_MODE_MODEM)
-				kfree(bcs->hw.hscx.rcvbuf);
-			bcs->hw.hscx.rcvbuf = NULL;
-		}
-		skb_queue_purge(&bcs->rqueue);
-		skb_queue_purge(&bcs->squeue);
-		if (bcs->tx_skb) {
-			dev_kfree_skb_any(bcs->tx_skb);
-			bcs->tx_skb = NULL;
-			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
-		}
-	}
-}
-
-static void
-modem_write_cmd(struct IsdnCardState *cs, u_char *buf, int len) {
-	int count, fp;
-	u_char *msg = buf;
-
-	if (!len)
-		return;
-	if (len > (MAX_MODEM_BUF - cs->hw.elsa.transcnt)) {
-		return;
-	}
-	fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
-	fp &= (MAX_MODEM_BUF - 1);
-	count = len;
-	if (count > MAX_MODEM_BUF - fp) {
-		count = MAX_MODEM_BUF - fp;
-		memcpy(cs->hw.elsa.transbuf + fp, msg, count);
-		cs->hw.elsa.transcnt += count;
-		msg += count;
-		count = len - count;
-		fp = 0;
-	}
-	memcpy(cs->hw.elsa.transbuf + fp, msg, count);
-	cs->hw.elsa.transcnt += count;
-	if (cs->hw.elsa.transcnt &&
-	    !(cs->hw.elsa.IER & UART_IER_THRI)) {
-		cs->hw.elsa.IER |= UART_IER_THRI;
-		serial_outp(cs, UART_IER, cs->hw.elsa.IER);
-	}
-}
-
-static void
-modem_set_init(struct IsdnCardState *cs) {
-	int timeout;
-
-#define RCV_DELAY 20
-	modem_write_cmd(cs, MInit_1, strlen(MInit_1));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-	modem_write_cmd(cs, MInit_2, strlen(MInit_2));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-	modem_write_cmd(cs, MInit_3, strlen(MInit_3));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-	modem_write_cmd(cs, MInit_4, strlen(MInit_4));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-	modem_write_cmd(cs, MInit_5, strlen(MInit_5));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-	modem_write_cmd(cs, MInit_6, strlen(MInit_6));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-	modem_write_cmd(cs, MInit_7, strlen(MInit_7));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-}
-
-static void
-modem_set_dial(struct IsdnCardState *cs, int outgoing) {
-	int timeout;
-#define RCV_DELAY 20
-
-	modem_write_cmd(cs, MInit_speed28800, strlen(MInit_speed28800));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-	if (outgoing)
-		modem_write_cmd(cs, MInit_dialout, strlen(MInit_dialout));
-	else
-		modem_write_cmd(cs, MInit_dialin, strlen(MInit_dialin));
-	timeout = 1000;
-	while (timeout-- && cs->hw.elsa.transcnt)
-		udelay(1000);
-	debugl1(cs, "msi tout=%d", timeout);
-	mdelay(RCV_DELAY);
-}
-
-static void
-modem_l2l1(struct PStack *st, int pr, void *arg)
-{
-	struct BCState *bcs = st->l1.bcs;
-	struct sk_buff *skb = arg;
-	u_long flags;
-
-	if (pr == (PH_DATA | REQUEST)) {
-		spin_lock_irqsave(&bcs->cs->lock, flags);
-		if (bcs->tx_skb) {
-			skb_queue_tail(&bcs->squeue, skb);
-		} else {
-			bcs->tx_skb = skb;
-			test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
-			bcs->hw.hscx.count = 0;
-			write_modem(bcs);
-		}
-		spin_unlock_irqrestore(&bcs->cs->lock, flags);
-	} else if (pr == (PH_ACTIVATE | REQUEST)) {
-		test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
-		st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
-		set_arcofi(bcs->cs, st->l1.bc);
-		mstartup(bcs->cs);
-		modem_set_dial(bcs->cs, test_bit(FLG_ORIG, &st->l2.flag));
-		bcs->cs->hw.elsa.MFlag = 2;
-	} else if (pr == (PH_DEACTIVATE | REQUEST)) {
-		test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
-		bcs->cs->dc.isac.arcofi_bc = st->l1.bc;
-		arcofi_fsm(bcs->cs, ARCOFI_START, &ARCOFI_XOP_0);
-		wait_event_interruptible(bcs->cs->dc.isac.arcofi_wait,
-				 bcs->cs->dc.isac.arcofi_state == ARCOFI_NOP);
-		bcs->cs->hw.elsa.MFlag = 1;
-	} else {
-		printk(KERN_WARNING "ElsaSer: unknown pr %x\n", pr);
-	}
-}
-
-static int
-setstack_elsa(struct PStack *st, struct BCState *bcs)
-{
-
-	bcs->channel = st->l1.bc;
-	switch (st->l1.mode) {
-	case L1_MODE_HDLC:
-	case L1_MODE_TRANS:
-		if (open_hscxstate(st->l1.hardware, bcs))
-			return (-1);
-		st->l2.l2l1 = hscx_l2l1;
-		break;
-	case L1_MODE_MODEM:
-		bcs->mode = L1_MODE_MODEM;
-		if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
-			bcs->hw.hscx.rcvbuf = bcs->cs->hw.elsa.rcvbuf;
-			skb_queue_head_init(&bcs->rqueue);
-			skb_queue_head_init(&bcs->squeue);
-		}
-		bcs->tx_skb = NULL;
-		test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
-		bcs->event = 0;
-		bcs->hw.hscx.rcvidx = 0;
-		bcs->tx_cnt = 0;
-		bcs->cs->hw.elsa.bcs = bcs;
-		st->l2.l2l1 = modem_l2l1;
-		break;
-	}
-	st->l1.bcs = bcs;
-	setstack_manager(st);
-	bcs->st = st;
-	setstack_l1_B(st);
-	return (0);
-}
-
-static void
-init_modem(struct IsdnCardState *cs) {
-
-	cs->bcs[0].BC_SetStack = setstack_elsa;
-	cs->bcs[1].BC_SetStack = setstack_elsa;
-	cs->bcs[0].BC_Close = close_elsastate;
-	cs->bcs[1].BC_Close = close_elsastate;
-	if (!(cs->hw.elsa.rcvbuf = kmalloc(MAX_MODEM_BUF,
-					   GFP_ATOMIC))) {
-		printk(KERN_WARNING
-		       "Elsa: No modem mem hw.elsa.rcvbuf\n");
-		return;
-	}
-	if (!(cs->hw.elsa.transbuf = kmalloc(MAX_MODEM_BUF,
-					     GFP_ATOMIC))) {
-		printk(KERN_WARNING
-		       "Elsa: No modem mem hw.elsa.transbuf\n");
-		kfree(cs->hw.elsa.rcvbuf);
-		cs->hw.elsa.rcvbuf = NULL;
-		return;
-	}
-	if (mstartup(cs)) {
-		printk(KERN_WARNING "Elsa: problem startup modem\n");
-	}
-	modem_set_init(cs);
-}
-
-static void
-release_modem(struct IsdnCardState *cs) {
-
-	cs->hw.elsa.MFlag = 0;
-	if (cs->hw.elsa.transbuf) {
-		if (cs->hw.elsa.rcvbuf) {
-			mshutdown(cs);
-			kfree(cs->hw.elsa.rcvbuf);
-			cs->hw.elsa.rcvbuf = NULL;
-		}
-		kfree(cs->hw.elsa.transbuf);
-		cs->hw.elsa.transbuf = NULL;
-	}
-}