Initial import of arm32 port

1 files changed, 1314 insertions, 0 deletions

diff --git a/sys/arch/arm32/mainbus/lpt.c b/sys/arch/arm32/mainbus/lpt.c
new file mode 100644
index 00000000000..35ff77c3f0d
--- /dev/null
+++ b/sys/arch/arm32/mainbus/lpt.c
@@ -0,0 +1,1314 @@
+/* $NetBSD: lpt.c,v 1.6 1996/03/28 21:52:47 mark Exp $ */
+
+/*
+ * Copyright (c) 1995 Mark Brinicombe
+ * Copyright (c) 1993, 1994 Charles Hannum.
+ * Copyright (c) 1990 William F. Jolitz, TeleMuse
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This software is a component of "386BSD" developed by 
+ *	William F. Jolitz, TeleMuse.
+ * 4. Neither the name of the developer nor the name "386BSD"
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 
+ * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 
+ * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 
+ * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 
+ * NOT MAKE USE OF THIS WORK.
+ *
+ * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
+ * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 
+ * REFERENCES SUCH AS THE  "PORTING UNIX TO THE 386" SERIES 
+ * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 
+ * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 
+ * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 
+ * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 
+ * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE DEVELOPER BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	from:$NetBSD: lpt.c,v 1.6 1996/03/28 21:52:47 mark Exp $
+ */
+
+/*
+ * Device Driver for AT parallel printer port
+ */
+/*
+ * PLIP driver code added by Mark Brinicombe
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/user.h>
+#include <sys/buf.h>
+#include <sys/kernel.h>
+#include <sys/ioctl.h>
+#include <sys/uio.h>
+#include <sys/device.h>
+#include <sys/syslog.h>
+
+#if defined(INET) && defined(PLIP)
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/if_types.h>
+#include <net/netisr.h>
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include "bpfilter.h"
+#if NBPFILTER > 0
+#include <sys/time.h>
+#include <net/bpf.h>
+#endif
+#endif
+
+#include <machine/cpu.h>
+#include <machine/katelib.h>
+#include <machine/irqhandler.h>
+#include <machine/io.h>
+#include <arm32/mainbus/lptreg.h>
+#include <arm32/mainbus/mainbus.h>
+
+#define	TIMEOUT		hz*16	/* wait up to 16 seconds for a ready */
+#define	STEP		hz/4
+
+#define	LPTPRI		(PZERO+8)
+#define	LPT_BSIZE	1024
+
+#if defined(INET) && defined(PLIP)
+#ifndef PLIPMTU                 /* MTU for the plip# interfaces */
+#if defined(COMPAT_PLIP10)
+#define PLIPMTU         1600
+#else
+#define PLIPMTU         (ETHERMTU - ifp->if_hdrlen)
+#endif
+#endif
+
+#ifndef PLIPMXSPIN1             /* DELAY factor for the plip# interfaces */
+#define PLIPMXSPIN1     2000    /* Spinning for remote intr to happen */
+#endif
+
+#ifndef PLIPMXSPIN2             /* DELAY factor for the plip# interfaces */
+#define PLIPMXSPIN2     6000    /* Spinning for remote handshake to happen */
+#endif
+
+#ifndef PLIPMXERRS              /* Max errors before !RUNNING */
+#define PLIPMXERRS      100
+#endif
+#ifndef PLIPMXRETRY
+#define PLIPMXRETRY     10      /* Max number of retransmits */
+#endif
+#ifndef PLIPRETRY
+#define PLIPRETRY       hz/10   /* Time between retransmits */
+#endif
+#endif
+
+#if !defined(DEBUG) || !defined(notdef)
+#define lprintf
+#else
+#define lprintf		if (lptdebug) printf
+int lptdebug = 1;
+#endif
+
+struct lpt_softc {
+	struct device sc_dev;
+	irqhandler_t sc_ih;
+
+	size_t sc_count;
+	struct buf *sc_inbuf;
+	u_char *sc_cp;
+	int sc_spinmax;
+	int sc_iobase;
+	int sc_irq;
+	u_char sc_state;
+#define	LPT_OPEN	0x01	/* device is open */
+#define	LPT_OBUSY	0x02	/* printer is busy doing output */
+#define	LPT_INIT	0x04	/* waiting to initialize for open */
+#define LPT_PLIP	0x08	/* busy with PLIP */
+	u_char sc_flags;
+#define	LPT_AUTOLF	0x20	/* automatic LF on CR */
+#define	LPT_NOPRIME	0x40	/* don't prime on open */
+#define	LPT_NOINTR	0x80	/* do not use interrupt */
+	u_char sc_control;
+	u_char sc_laststatus;
+#if defined(INET) && defined(PLIP)
+	struct arpcom	sc_arpcom;
+	u_char		*sc_ifbuf;
+	int		sc_iferrs;
+	int		sc_ifretry;
+#if defined(COMPAT_PLIP10)
+	u_char		sc_adrcksum;
+#endif
+#endif
+};
+
+int lptprobe __P((struct device *, void *, void *));
+void lptattach __P((struct device *, struct device *, void *));
+int lptintr __P((void *));
+
+#if defined(INET) && defined(PLIP)
+/* Functions for the plip# interface */
+static void plipattach(struct lpt_softc *,int);
+static int plipioctl(struct ifnet *, u_long, caddr_t);
+static void plipstart(struct ifnet *);
+static int plipintr(struct lpt_softc *);
+#endif
+
+struct cfattach lpt_ca = {
+	sizeof(struct lpt_softc), lptprobe, lptattach
+};
+
+struct cfdriver lpt_cd = {
+	NULL, "lpt", DV_TTY
+};
+
+#define	LPTUNIT(s)	(minor(s) & 0x1f)
+#define	LPTFLAGS(s)	(minor(s) & 0xe0)
+
+#define	LPS_INVERT	(LPS_SELECT|LPS_NERR|LPS_NBSY|LPS_NACK)
+#define	LPS_MASK	(LPS_SELECT|LPS_NERR|LPS_NBSY|LPS_NACK|LPS_NOPAPER)
+#define	NOT_READY()	((inb(iobase + lpt_status) ^ LPS_INVERT) & LPS_MASK)
+#define	NOT_READY_ERR()	not_ready(inb(iobase + lpt_status), sc)
+static int not_ready __P((u_char, struct lpt_softc *));
+
+static void lptwakeup __P((void *arg));
+static int pushbytes __P((struct lpt_softc *));
+
+/*
+ * Internal routine to lptprobe to do port tests of one byte value.
+ */
+int
+lpt_port_test(port, data, mask)
+	int port;
+	u_char data, mask;
+{
+	int timeout;
+	u_char temp;
+
+	data &= mask;
+	outb(port, data);
+	timeout = 1000;
+	do {
+		delay(10);
+		temp = inb(port) & mask;
+	} while (temp != data && --timeout);
+	lprintf("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n", port, data,
+	    temp, timeout);
+	return (temp == data);
+}
+
+/*
+ * Logic:
+ *	1) You should be able to write to and read back the same value
+ *	   to the data port.  Do an alternating zeros, alternating ones,
+ *	   walking zero, and walking one test to check for stuck bits.
+ *
+ *	2) You should be able to write to and read back the same value
+ *	   to the control port lower 5 bits, the upper 3 bits are reserved
+ *	   per the IBM PC technical reference manauls and different boards
+ *	   do different things with them.  Do an alternating zeros, alternating
+ *	   ones, walking zero, and walking one test to check for stuck bits.
+ *
+ *	   Some printers drag the strobe line down when the are powered off
+ * 	   so this bit has been masked out of the control port test.
+ *
+ *	   XXX Some printers may not like a fast pulse on init or strobe, I
+ *	   don't know at this point, if that becomes a problem these bits
+ *	   should be turned off in the mask byte for the control port test.
+ *
+ *	3) Set the data and control ports to a value of 0
+ */
+int
+lptprobe(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct mainbus_attach_args *mb = aux;
+	int iobase = mb->mb_iobase;
+	int port;
+	u_char mask, data;
+	int i;
+
+#ifdef DEBUG
+#define	ABORT	do {printf("lptprobe: mask %x data %x failed\n", mask, data); \
+		    return 0;} while (0)
+#else
+#define	ABORT	return 0
+#endif
+
+	port = iobase + lpt_data;
+	mask = 0xff;
+
+	data = 0x55;				/* Alternating zeros */
+	if (!lpt_port_test(port, data, mask))
+		ABORT;
+
+	data = 0xaa;				/* Alternating ones */
+	if (!lpt_port_test(port, data, mask))
+		ABORT;
+
+	for (i = 0; i < CHAR_BIT; i++) {	/* Walking zero */
+		data = ~(1 << i);
+		if (!lpt_port_test(port, data, mask))
+			ABORT;
+	}
+
+	for (i = 0; i < CHAR_BIT; i++) {	/* Walking one */
+		data = (1 << i);
+		if (!lpt_port_test(port, data, mask))
+			ABORT;
+	}
+
+	outb(iobase + lpt_data, 0);
+	outb(iobase + lpt_control, 0);
+
+	mb->mb_iosize = LPT_NPORTS;
+	return 1;
+}
+
+void
+lptattach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct lpt_softc *sc = (void *)self;
+	struct mainbus_attach_args *mb = aux;
+	int iobase = mb->mb_iobase;
+
+	if (mb->mb_irq != IRQUNK)
+		printf("\n");
+	else
+		printf(": polled\n");
+
+	sc->sc_iobase = iobase;
+	sc->sc_irq = mb->mb_irq;
+	sc->sc_state = 0;
+	outb(iobase + lpt_control, LPC_NINIT);
+
+	if (mb->mb_irq != IRQUNK) {
+		sc->sc_ih.ih_func = lptintr;
+		sc->sc_ih.ih_arg = sc;
+#if defined(INET) && defined(PLIP)
+		sc->sc_ih.ih_level = IPL_NET;
+		sc->sc_ih.ih_name = "lpt/plip";
+        	plipattach(sc, self->dv_unit);
+#else
+		sc->sc_ih.ih_level = IPL_NONE;
+		sc->sc_ih.ih_name = "lpt";
+#endif
+		if (irq_claim(mb->mb_irq, &sc->sc_ih))
+			panic("Cannot claim IRQ %d for lpt%d\n", mb->mb_irq, sc->sc_dev.dv_unit);
+
+	}
+#if defined(INET) && defined(PLIP)
+	else {
+		printf("Warning PLIP device needs IRQ driven lpt driver\n");
+	}
+#endif
+}
+
+/*
+ * Reset the printer, then wait until it's selected and not busy.
+ */
+int
+lptopen(dev, flag)
+	dev_t dev;
+	int flag;
+{
+	int unit = LPTUNIT(dev);
+	u_char flags = LPTFLAGS(dev);
+	struct lpt_softc *sc;
+	int iobase;
+	u_char control;
+	int error;
+	int spin;
+
+	if (unit >= lpt_cd.cd_ndevs)
+		return ENXIO;
+	sc = lpt_cd.cd_devs[unit];
+	if (!sc)
+		return ENXIO;
+
+	if (sc->sc_irq == IRQUNK && (flags & LPT_NOINTR) == 0)
+		return ENXIO;
+
+#ifdef DIAGNOSTIC
+	if (sc->sc_state)
+		printf("%s: stat=0x%x not zero\n", sc->sc_dev.dv_xname,
+		    sc->sc_state);
+#endif
+
+	if (sc->sc_state)
+		return EBUSY;
+
+	sc->sc_state = LPT_INIT;
+	sc->sc_flags = flags;
+	lprintf("%s: open: flags=0x%x\n", sc->sc_dev.dv_xname, flags);
+	iobase = sc->sc_iobase;
+
+	if ((flags & LPT_NOPRIME) == 0) {
+		/* assert INIT for 100 usec to start up printer */
+		outb(iobase + lpt_control, LPC_SELECT);
+		delay(100);
+	}
+
+	control = LPC_SELECT | LPC_NINIT;
+	outb(iobase + lpt_control, control);
+
+	/* wait till ready (printer running diagnostics) */
+	for (spin = 0; NOT_READY_ERR(); spin += STEP) {
+		if (spin >= TIMEOUT) {
+			sc->sc_state = 0;
+			return EBUSY;
+		}
+
+		/* wait 1/4 second, give up if we get a signal */
+		if (error = tsleep((caddr_t)sc, LPTPRI | PCATCH, "lptopen",
+		    STEP) != EWOULDBLOCK) {
+			sc->sc_state = 0;
+			return error;
+		}
+	}
+
+	if ((flags & LPT_NOINTR) == 0)
+		control |= LPC_IENABLE;
+	if (flags & LPT_AUTOLF)
+		control |= LPC_AUTOLF;
+	sc->sc_control = control;
+	outb(iobase + lpt_control, control);
+
+	sc->sc_inbuf = geteblk(LPT_BSIZE);
+	sc->sc_count = 0;
+	sc->sc_state = LPT_OPEN;
+
+	if ((sc->sc_flags & LPT_NOINTR) == 0)
+		lptwakeup(sc);
+
+	lprintf("%s: opened\n", sc->sc_dev.dv_xname);
+	return 0;
+}
+
+int
+not_ready(status, sc)
+	u_char status;
+	struct lpt_softc *sc;
+{
+	u_char new;
+
+	status = (status ^ LPS_INVERT) & LPS_MASK;
+	new = status & ~sc->sc_laststatus;
+	sc->sc_laststatus = status;
+
+	if (new & LPS_SELECT)
+		log(LOG_NOTICE, "%s: offline\n", sc->sc_dev.dv_xname);
+	else if (new & LPS_NOPAPER)
+		log(LOG_NOTICE, "%s: out of paper\n", sc->sc_dev.dv_xname);
+	else if (new & LPS_NERR)
+		log(LOG_NOTICE, "%s: output error\n", sc->sc_dev.dv_xname);
+
+	return status;
+}
+
+
+void
+lptwakeup(arg)
+	void *arg;
+{
+	struct lpt_softc *sc = arg;
+	int s;
+
+	s = spltty();
+	lptintr(sc);
+	splx(s);
+
+	timeout(lptwakeup, sc, STEP);
+}
+
+/*
+ * Close the device, and free the local line buffer.
+ */
+lptclose(dev, flag)
+	dev_t dev;
+	int flag;
+{
+	int unit = LPTUNIT(dev);
+	struct lpt_softc *sc = lpt_cd.cd_devs[unit];
+	int iobase = sc->sc_iobase;
+
+	if (sc->sc_count)
+		(void) pushbytes(sc);
+
+	if ((sc->sc_flags & LPT_NOINTR) == 0)
+		untimeout(lptwakeup, sc);
+
+	outb(iobase + lpt_control, LPC_NINIT);
+	sc->sc_state = 0;
+	outb(iobase + lpt_control, LPC_NINIT);
+	brelse(sc->sc_inbuf);
+
+	lprintf("%s: closed\n", sc->sc_dev.dv_xname);
+	return 0;
+}
+
+int
+pushbytes(sc)
+	struct lpt_softc *sc;
+{
+	int iobase = sc->sc_iobase;
+	int error;
+
+	if (sc->sc_flags & LPT_NOINTR) {
+		int spin, tic;
+		u_char control = sc->sc_control;
+
+		while (sc->sc_count > 0) {
+			spin = 0;
+			while (NOT_READY()) {
+				if (++spin < sc->sc_spinmax)
+					continue;
+				tic = 0;
+				/* adapt busy-wait algorithm */
+				sc->sc_spinmax++;
+				while (NOT_READY_ERR()) {
+					/* exponential backoff */
+					tic = tic + tic + 1;
+					if (tic > TIMEOUT)
+						tic = TIMEOUT;
+					error = tsleep((caddr_t)sc,
+					    LPTPRI | PCATCH, "lptpsh", tic);
+					if (error != EWOULDBLOCK)
+						return error;
+				}
+				break;
+			}
+
+			outb(iobase + lpt_data, *sc->sc_cp++);
+			outb(iobase + lpt_control, control | LPC_STROBE);
+			sc->sc_count--;
+			outb(iobase + lpt_control, control);
+
+			/* adapt busy-wait algorithm */
+			if (spin*2 + 16 < sc->sc_spinmax)
+				sc->sc_spinmax--;
+		}
+	} else {
+		int s;
+
+		while (sc->sc_count > 0) {
+			/* if the printer is ready for a char, give it one */
+			if ((sc->sc_state & LPT_OBUSY) == 0) {
+				lprintf("%s: write %d\n", sc->sc_dev.dv_xname,
+				    sc->sc_count);
+				s = spltty();
+				(void) lptintr(sc);
+				splx(s);
+			}
+			if (error = tsleep((caddr_t)sc, LPTPRI | PCATCH,
+			    "lptwrite2", 0))
+				return error;
+		}
+	}
+	return 0;
+}
+
+/* 
+ * Copy a line from user space to a local buffer, then call putc to get the
+ * chars moved to the output queue.
+ */
+lptwrite(dev, uio)
+	dev_t dev;
+	struct uio *uio;
+{
+	struct lpt_softc *sc = lpt_cd.cd_devs[LPTUNIT(dev)];
+	size_t n;
+	int error = 0;
+
+	while (n = min(LPT_BSIZE, uio->uio_resid)) {
+		uiomove(sc->sc_cp = sc->sc_inbuf->b_data, n, uio);
+		sc->sc_count = n;
+		error = pushbytes(sc);
+		if (error) {
+			/*
+			 * Return accurate residual if interrupted or timed
+			 * out.
+			 */
+			uio->uio_resid += sc->sc_count;
+			sc->sc_count = 0;
+			return error;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Handle printer interrupts which occur when the printer is ready to accept
+ * another char.
+ */
+int
+lptintr(arg)
+	void *arg;
+{
+	struct lpt_softc *sc = arg;
+	int iobase = sc->sc_iobase;
+
+/*printf("lptintr:\n");*/
+
+#if defined(INET) && defined(PLIP)
+	if (sc->sc_arpcom.ac_if.if_flags & IFF_UP) {
+		return(plipintr(sc));
+	}
+#endif
+
+#if 0
+	if ((sc->sc_state & LPT_OPEN) == 0)
+		return 0;
+#endif
+
+	/* is printer online and ready for output */
+	if (NOT_READY() && NOT_READY_ERR())
+		return 0;
+
+	if (sc->sc_count) {
+		u_char control = sc->sc_control;
+		/* send char */
+		outb(iobase + lpt_data, *sc->sc_cp++);
+		outb(iobase + lpt_control, control | LPC_STROBE);
+		sc->sc_count--;
+		outb(iobase + lpt_control, control);
+		sc->sc_state |= LPT_OBUSY;
+	} else
+		sc->sc_state &= ~LPT_OBUSY;
+
+	if (sc->sc_count == 0) {
+		/* none, wake up the top half to get more */
+		wakeup((caddr_t)sc);
+	}
+
+	return(1);
+}
+
+int
+lptioctl(dev, cmd, data, flag)
+	dev_t dev;
+	u_long cmd;
+	caddr_t data;
+	int flag;
+{
+	int error = 0;
+
+	switch (cmd) {
+	default:
+		error = ENODEV;
+	}
+
+	return error;
+}
+
+
+#if defined(INET) && defined(PLIP)
+
+#define PLIP_INTR_ENABLE	(LPC_NINIT | LPC_SELECT | LPC_IENABLE)
+#define PLIP_INTR_DISABLE	(LPC_NINIT | LPC_SELECT)
+#define PLIP_DATA		(iobase + lpt_data)
+#define PLIP_STATUS		(iobase + lpt_status)
+#define PLIP_CONTROL		(iobase + lpt_control)
+#define PLIP_REMOTE_TRIGGER	0x08
+#define PLIP_DELAY_UNIT		50
+#if PLIP_DELAY_UNIT > 0	
+#define PLIP_DELAY		DELAY(PLIP_DELAY_UNIT)
+#else
+#define PLIP_DELAY
+#endif
+#define PLIP_DEBUG_RX	0x01
+#define PLIP_DEBUG_TX	0x02
+#define PLIP_DEBUG_IF	0x04
+#define PLIP_DEBUG	0x07
+#if PLIP_DEBUG != 0
+static int plip_debug = PLIP_DEBUG;
+#endif
+
+static void
+plipattach(struct lpt_softc *sc, int unit)
+{
+	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
+
+	sc->sc_ifbuf = NULL;
+	ifp->if_unit = unit;
+	ifp->if_name = "plip";
+	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS;
+	ifp->if_output = ether_output;
+	ifp->if_start = plipstart;
+	ifp->if_ioctl = plipioctl;
+	ifp->if_watchdog = 0;
+
+	ifp->if_type = IFT_ETHER;
+	ifp->if_addrlen = 6;
+	ifp->if_hdrlen = 14;
+	ifp->if_mtu = PLIPMTU;
+
+	if_attach(ifp);
+	ether_ifattach(ifp);
+
+	printf("plip%d at lpt%d: mtu=%d,%d,%d", unit, unit, (int) ifp->if_mtu,
+	    ifp->if_hdrlen, ifp->if_addrlen);
+	if (sizeof(struct ether_header) != 14)
+		printf(" ethhdr super kludge mode enabled\n");
+	else
+		printf("\n");
+
+#if NBPFILTER > 0
+	bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
+#endif                 
+}
+
+/*
+ * Process an ioctl request.
+ */
+static int
+plipioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
+{
+	struct proc *p = curproc;
+	struct lpt_softc *sc = (struct lpt_softc *) lpt_cd.cd_devs[ifp->if_unit];
+	unsigned int iobase = sc->sc_iobase;
+	struct ifaddr *ifa = (struct ifaddr *)data;
+	struct ifreq *ifr = (struct ifreq *)data; 
+	int s;
+	int error = 0;
+
+#if PLIP_DEBUG > 0
+	printf("plipioctl: cmd=%08x ifp=%08x data=%08x\n", cmd, ifp, data);
+	printf("plipioctl: ifp->flags=%08x\n", ifp->if_flags);
+#endif
+
+	switch (cmd) {
+
+	case SIOCSIFFLAGS:
+		if (((ifp->if_flags & IFF_UP) == 0) &&
+		    (ifp->if_flags & IFF_RUNNING)) {
+		        ifp->if_flags &= ~IFF_RUNNING;
+/* Deactive the parallel port */
+#if PLIP_DEBUG != 0
+			if (plip_debug & PLIP_DEBUG_IF)
+				printf("plip: Disabling lpt irqs\n");
+#endif
+			outb(PLIP_DATA, 0x00);
+			outb(PLIP_CONTROL, PLIP_INTR_DISABLE);
+			sc->sc_state = 0;
+			         
+			if (sc->sc_ifbuf)
+				free(sc->sc_ifbuf, M_DEVBUF);
+				
+			sc->sc_ifbuf = NULL;
+		}
+		if (((ifp->if_flags & IFF_UP)) &&
+		    ((ifp->if_flags & IFF_RUNNING) == 0)) {
+			if (sc->sc_state) {
+				error = EBUSY;
+				break;
+			}
+/*			if (!(ifp->if_flags & IFF_DEBUG))
+				plip_debug = PLIP_DEBUG;
+			else
+				plip_debug = 0;*/
+			sc->sc_state = LPT_OPEN | LPT_PLIP;
+			if (!sc->sc_ifbuf)
+				sc->sc_ifbuf =
+					malloc(ifp->if_mtu + ifp->if_hdrlen,
+					       M_DEVBUF, M_WAITOK);
+		        ifp->if_flags |= IFF_RUNNING;
+/* This starts it running */
+/* Enable lpt interrupts */
+
+#if PLIP_DEBUG != 0
+			if (plip_debug & PLIP_DEBUG_IF)
+				printf("plip: Enabling lpt irqs\n");
+#endif
+			outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
+			outb(PLIP_DATA, 0x00);
+		}
+		break;
+
+	case SIOCSIFADDR:
+		if (ifa->ifa_addr->sa_family == AF_INET) {
+			if (!sc->sc_ifbuf)
+				sc->sc_ifbuf =
+					malloc(PLIPMTU + ifp->if_hdrlen,
+					       M_DEVBUF, M_WAITOK);
+
+			sc->sc_arpcom.ac_enaddr[0] = 0xfc;
+			sc->sc_arpcom.ac_enaddr[1] = 0xfc;
+			bcopy((caddr_t)&IA_SIN(ifa)->sin_addr,
+			      (caddr_t)&sc->sc_arpcom.ac_enaddr[2], 4);
+			sc->sc_arpcom.ac_ipaddr = IA_SIN(ifa)->sin_addr;
+#if defined(COMPAT_PLIP10)
+			if (ifp->if_flags & IFF_LINK0) {
+				int i;
+				sc->sc_arpcom.ac_enaddr[0] = 0xfd;
+				sc->sc_arpcom.ac_enaddr[1] = 0xfd;
+				for (i = sc->sc_adrcksum = 0; i < 5; i++)
+					sc->sc_adrcksum += sc->sc_arpcom.ac_enaddr[i];
+				sc->sc_adrcksum *= 2;
+			}
+#endif
+			ifp->if_flags |= IFF_RUNNING | IFF_UP;
+#if 0
+			for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
+				struct sockaddr_dl *sdl;
+				if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
+				    sdl->sdl_family == AF_LINK) {
+					sdl->sdl_type = IFT_ETHER;
+					sdl->sdl_alen = ifp->if_addrlen;
+					bcopy((caddr_t)((struct arpcom *)ifp)->ac_enaddr,
+					      LLADDR(sdl), ifp->if_addrlen);
+					break;
+				    }
+			}
+#endif
+/* Looks the same as the start condition above */
+/* Enable lpt interrupts */
+
+#if PLIP_DEBUG != 0
+			if (plip_debug & PLIP_DEBUG_IF)
+				printf("plip: Enabling lpt irqs\n");
+#endif
+			outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
+			outb(PLIP_DATA, 0x00);
+
+			arp_ifinit(&sc->sc_arpcom, ifa);
+		} else
+			error = EAFNOSUPPORT;
+		break;
+
+	case SIOCAIFADDR:
+	case SIOCDIFADDR:
+	case SIOCSIFDSTADDR:
+		if (ifa->ifa_addr->sa_family != AF_INET)
+			error = EAFNOSUPPORT;
+		break;
+
+	case SIOCSIFMTU:
+        	if ((error = suser(p->p_ucred, &p->p_acflag)))
+            		return(error);
+		if (ifp->if_mtu != ifr->ifr_metric) {
+		        ifp->if_mtu = ifr->ifr_metric;
+			if (sc->sc_ifbuf) {
+				s = splimp();
+
+				free(sc->sc_ifbuf, M_DEVBUF);
+				sc->sc_ifbuf =
+					malloc(ifp->if_mtu + ifp->if_hdrlen,
+					       M_DEVBUF, M_WAITOK);
+				splx(s);
+			}
+		}
+		break;
+
+        case SIOCGIFMTU:
+	        ifr->ifr_metric = ifp->if_mtu;
+		break;
+
+	default:
+		error = EINVAL;
+	}
+	return (error);
+}
+
+static int
+plipreceive(unsigned int iobase, u_char *buf, int len)
+{
+	int i;
+	u_char cksum = 0, c;
+	u_char c0, c1;
+
+#if PLIP_DEBUG != 0
+	if (plip_debug & PLIP_DEBUG_RX)
+		printf("Rx: ");
+#endif
+
+	while (len--) {
+		i = PLIPMXSPIN2;
+/* Receive a byte */
+
+/* Wait for a steady handshake */
+		while (1) {
+			c0 = inb(PLIP_STATUS);
+			if ((c0 & LPS_NBSY) == 0) {
+				c1 = inb(PLIP_STATUS);
+				if (c0 == c1) break;
+#if PLIP_DEBUG != 0
+				if (plip_debug & PLIP_DEBUG_RX)
+					printf("rx: %02x-%02x ", c0, c1);
+#endif
+			}
+			--i;
+			if (i < 0) {
+#if PLIP_DEBUG > 0
+				printf("timeout rx lsn %02x\n", c0);
+#endif
+				return(-1);
+			}
+			PLIP_DELAY;
+		}
+		c = (c0 >> 3) & 0x0f;
+
+/* Acknowledge */
+		outb(PLIP_DATA, 0x10);
+
+/* Another handshake */		
+		i = PLIPMXSPIN2;
+		while (1) {
+			c0 = inb(PLIP_STATUS);
+			if (c0 & LPS_NBSY) {
+				c1 = inb(PLIP_STATUS);
+				if (c0 == c1) break;
+#if PLIP_DEBUG != 0
+				if (plip_debug & PLIP_DEBUG_RX)
+					printf("rx: %02x-%02x ", c0, c1);
+#endif
+			}
+			--i;
+			if (i < 0) {
+#if PLIP_DEBUG > 0
+				printf("timeout rx msn %02x\n", c0);
+#endif
+				return(-1);
+			}
+			PLIP_DELAY;
+		}
+		c = c | ((c0 << 1) & 0xf0);
+/* Acknowledge */
+		outb(PLIP_DATA, 0x00);
+#if PLIP_DEBUG != 0
+		if (plip_debug & PLIP_DEBUG_RX)
+			printf("%02x ", c);
+#endif
+
+		cksum += (*buf++ = c);
+	}
+#if PLIP_DEBUG != 0
+	if (plip_debug & PLIP_DEBUG_RX)
+		printf("\n");
+#endif
+	return(cksum);
+}
+
+static int
+plipintr(struct lpt_softc *sc)
+{
+	extern struct mbuf *m_devget(char *, int, int, struct ifnet *, void (*)());
+	struct ifnet *ifp = &sc->sc_arpcom.ac_if;
+	unsigned int iobase = sc->sc_iobase;
+	struct mbuf *m;
+	struct ether_header *eh;
+	u_char *p = sc->sc_ifbuf, minibuf[4];
+	int c, s, len, cksum;
+	u_char c0;
+
+printf("plipintr:\n");
+
+/* Get the status */
+
+	c0 = inb(PLIP_STATUS);
+#if PLIP_DEBUG > 0
+	if ((c0 & 0xf8) != 0xc0) {
+		printf("st5=%02x ", c0);
+	}
+#endif
+
+/* Don't want ints while receiving */
+
+	outb(PLIP_CONTROL, PLIP_INTR_DISABLE);
+
+	outb(PLIP_DATA, 0x01);   /* send ACK */ /* via NERR */
+                                              
+#if defined(COMPAT_PLIP10)
+	if (ifp->if_flags & IFF_LINK0) {
+		if (plipreceive(iobase, minibuf, 3) < 0) goto err;
+		len = (minibuf[1] << 8) | minibuf[2];
+		if (len > (ifp->if_mtu + ifp->if_hdrlen)) goto err;
+
+		switch (minibuf[0]) {
+		case 0xfc:
+			p[0] = p[ 6] = ifp->ac_enaddr[0];
+			p[1] = p[ 7] = ifp->ac_enaddr[1];
+			p[2] = p[ 8] = ifp->ac_enaddr[2];
+			p[3] = p[ 9] = ifp->ac_enaddr[3];
+			p[4] = p[10] = ifp->ac_enaddr[4];
+			p += 5;
+			if ((cksum = plipreceive(iobase, p, 1)) < 0) goto err;
+			p += 6;
+			if ((c = plipreceive(iobase, p, len - 11)) < 0) goto err;
+			cksum += c + sc->sc_adrcksum;
+			c = p[1]; p[1] = p[2]; p[2] = c;
+			cksum &= 0xff;
+			break;
+		case 0xfd:
+			if ((cksum = plipreceive(iobase, p, len)) < 0) goto err;
+			break;
+		default:
+			goto err;
+		}
+	} else
+#endif
+	{
+		if (plipreceive(iobase, minibuf, 2) < 0) goto err;
+		len = (minibuf[1] << 8) | minibuf[0];
+		if (len > (ifp->if_mtu + ifp->if_hdrlen)) {
+			log(LOG_NOTICE, "plip%d: packet > MTU\n", ifp->if_unit);
+			goto err;
+		}
+#if PLIP_DEBUG != 0
+		if (plip_debug & PLIP_DEBUG_RX)
+			printf("len=%d ", len);
+#endif
+       		if (sizeof(struct ether_header) != 14) {
+         		if ((cksum = plipreceive(iobase, p, 14)) < 0) goto err;
+         		if ((c = plipreceive(iobase, p+16, len-14)) < 0) goto err;
+         		cksum += c;
+			len += 2;
+		}
+		else
+         		if ((cksum = plipreceive(iobase, p, len)) < 0) goto err;
+	}
+	
+	if (plipreceive(iobase, minibuf, 1) < 0) goto err;
+	if ((cksum & 0xff) != minibuf[0]) {
+		printf("cksum=%d, %d, %d\n", cksum, c, minibuf[0]);
+		log(LOG_NOTICE, "plip%d: checksum error\n", ifp->if_unit);
+		goto err;
+	} 
+
+	outb(PLIP_DATA, 0x00);   /* clear ACK */ /* via NERR */
+#if PLIP_DEBUG != 0
+	if (plip_debug & PLIP_DEBUG_RX)
+		printf("done\n");
+#endif
+	s = splimp();
+	
+	eh = (struct ether_header *)sc->sc_ifbuf;
+
+	if ((m = m_devget(sc->sc_ifbuf + sizeof(struct ether_header), len - sizeof(struct ether_header), 0, ifp, NULL))) {
+		/* We assume that the header fit entirely in one mbuf. */
+/*		eh = mtod(m, struct ether_header *);*/
+/*		m->m_pkthdr.len -= sizeof(*eh);*/
+/*		m->m_len -= sizeof(*eh);*/
+/*		m->m_data += sizeof(*eh);*/
+/*		printf("m->m_data=%08x ifbuf=%08x eh=%08x\n", m->m_data, sc->sc_ifbuf, eh);*/
+
+#if NBPFILTER > 0
+/*
+ * Check if there's a BPF listener on this interface.
+ * If so, hand off the raw packet to bpf.
+ */
+		if (sc->sc_arpcom.ac_if.if_bpf) {
+			bpf_mtap(sc->sc_arpcom.ac_if.if_bpf, m);
+		}
+#endif
+		ether_input(ifp, eh, m);
+	}
+	splx(s);
+	sc->sc_iferrs = 0;
+	ifp->if_ipackets++;
+
+/* Allow ints again */
+
+	outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
+	return(1);
+
+err:
+	outb(PLIP_DATA, 0x00);   /* clear ACK */ /* via NERR */
+
+	ifp->if_ierrors++;
+	sc->sc_iferrs++;
+	if (sc->sc_iferrs > PLIPMXERRS
+	    || (sc->sc_iferrs > 5 && (inb(iobase + lpt_status) & LPS_NBSY))) {
+		/* We are not able to send receive anything for now,
+		 * so stop wasting our time and leave the interrupt
+		 * disabled.
+		 */
+		if (sc->sc_iferrs == PLIPMXERRS + 1)
+			log(LOG_NOTICE, "plip%d: rx hard error\n", ifp->if_unit);
+/*	xxx	i8255->port_a |= LPA_ACTIVE;*/
+	} else
+;
+/*	xxx	i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;*/
+
+/* Allow ints again */
+
+	outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
+	return(1);
+}
+
+static int
+pliptransmit(unsigned int iobase, u_char *buf, int len)
+{
+	int i;
+	u_char cksum = 0, c;
+	u_char c0;
+#if PLIP_DEBUG != 0
+	if (plip_debug & PLIP_DEBUG_TX)
+		printf("tx: len=%d ", len);
+#endif
+
+	while (len--) {
+		i = PLIPMXSPIN2;
+		cksum += (c = *buf++);
+#if PLIP_DEBUG != 0
+		if (plip_debug & PLIP_DEBUG_TX)
+			printf("%02x ", c);
+#endif
+/*	xxx	while ((i8255->port_c & LPC_NBUSY) == 0)
+			if (i-- < 0) return -1;
+		i8255->port_b = c & 0x0f;
+		i8255->port_b = c & 0x0f | 0x10;
+		c >>= 4;
+		while ((i8255->port_c & LPC_NBUSY) != 0)
+			if (i-- < 0) return -1;
+		i8255->port_b = c | 0x10;
+		i8255->port_b = c;
+*/
+
+/* Send the nibble + handshake */
+
+		outb(PLIP_DATA, 0x00 | (c & 0x0f));
+		outb(PLIP_DATA, 0x10 | (c & 0x0f));
+
+		while (1) {
+			c0 = inb(PLIP_STATUS);
+			if ((c0 & LPS_NBSY) == 0)
+				break;
+			if (--i == 0) { /* time out */
+#if PLIP_DEBUG > 0
+				printf("timeout tx lsn %02x ", c0);
+#endif
+				return(-1);
+			}
+			PLIP_DELAY;
+		}
+
+		outb(PLIP_DATA, 0x10 | (c >> 4));
+		outb(PLIP_DATA, 0x00 | (c >> 4));
+		i = PLIPMXSPIN2;
+		while (1) {
+			c0 = inb(PLIP_STATUS);
+			if ((c0 & LPS_NBSY) != 0)
+				break;
+			if (--i == 0) { /* time out */
+#if PLIP_DEBUG > 0
+				printf("timeout tx msn %02x ", c0);
+#endif
+				return(-1);
+			}
+			PLIP_DELAY;
+		}
+	}
+#if PLIP_DEBUG != 0
+	if (plip_debug & PLIP_DEBUG_TX)
+		printf("done\n");
+#endif
+	return(cksum);
+}
+
+/*
+ * Setup output on interface.
+ */
+static void
+plipstart(struct ifnet *ifp)
+{
+	struct lpt_softc *sc = (struct lpt_softc *) lpt_cd.cd_devs[ifp->if_unit];
+	unsigned int iobase = sc->sc_iobase;
+	struct mbuf *m0, *m;
+	u_char minibuf[4], cksum;
+	int len, i, s;
+	u_char *p;
+
+#if PLIP_DEBUG != 0
+	if (plip_debug & PLIP_DEBUG_TX)
+		printf("plipstart: ");
+#endif
+	if (ifp->if_flags & IFF_OACTIVE)
+		return;
+	ifp->if_flags |= IFF_OACTIVE;
+
+	if (sc->sc_ifretry)
+		untimeout((void (*)(void *))plipstart, ifp);
+
+	for (;;) {
+		s = splimp();
+		IF_DEQUEUE(&ifp->if_snd, m0);
+		splx(s);
+		if (!m0)
+			break;
+
+		for (len = 0, m = m0; m; m = m->m_next) {
+#if PLIP_DEBUG > 0
+			if (plip_debug & PLIP_DEBUG_TX)
+				printf("len=%d %d\n", m->m_len, len);
+#endif
+			len += m->m_len;
+		}
+#if NBPFILTER > 0
+		p = sc->sc_ifbuf;
+		for (m = m0; m; m = m->m_next) {
+			if (m->m_len == 0)
+				continue;
+			bcopy(mtod(m, u_char *), p, m->m_len);
+			p += m->m_len;
+		}
+		if (sc->sc_arpcom.ac_if.if_bpf)
+			bpf_tap(sc->sc_arpcom.ac_if.if_bpf, sc->sc_ifbuf, len);
+#endif
+       		if (sizeof(struct ether_header) != 14)
+			len -= 2;
+#if defined(COMPAT_PLIP10)
+		if (ifp->if_flags & IFF_LINK0) {
+			minibuf[0] = 3;
+			minibuf[1] = 0xfd;
+			minibuf[2] = len >> 8;
+			minibuf[3] = len;
+		} else
+#endif
+		{
+			minibuf[0] = 2;
+			minibuf[1] = len;
+			minibuf[2] = len >> 8;
+		}
+
+/*yyy		for (i = PLIPMXSPIN1; (inb(PLIP_STATUS) & LPS_NERR) != 0; i--)
+			if (i < 0) goto retry;*/
+
+		/* Trigger remote interrupt */
+
+#if PLIP_DEBUG > 0
+		if (plip_debug & PLIP_DEBUG_TX)
+			printf("st=%02x ", inb(PLIP_STATUS));
+#endif
+		if (inb(PLIP_STATUS) & LPS_NERR) {
+			for (i = PLIPMXSPIN1; (inb(PLIP_STATUS) & LPS_NERR) != 0; i--)
+				PLIP_DELAY;
+#if PLIP_DEBUG > 0
+			if (plip_debug & PLIP_DEBUG_TX)
+				printf("st1=%02x ", inb(PLIP_STATUS));
+#endif
+		}
+
+		outb(PLIP_DATA, PLIP_REMOTE_TRIGGER);
+		for (i = PLIPMXSPIN1; (inb(PLIP_STATUS) & LPS_NERR) == 0; i--) {
+			if (i < 0 || (i > PLIPMXSPIN1/3
+			    && inb(PLIP_STATUS) & LPS_NACK)) {
+#if PLIP_DEBUG > 0
+			    printf("trigger ack timeout\n");
+#endif
+				goto retry;
+			}
+			PLIP_DELAY;
+		}
+#if PLIP_DEBUG > 0
+		if (plip_debug & PLIP_DEBUG_TX)
+			printf("st3=%02x ", inb(PLIP_STATUS));
+#endif
+
+/* Don't want ints while transmitting */
+
+		outb(PLIP_CONTROL, PLIP_INTR_DISABLE);
+
+		if (pliptransmit(iobase, minibuf + 1, minibuf[0]) < 0) goto retry;
+		for (cksum = 0, m = m0; m; m = m->m_next) {
+			if (sizeof(struct ether_header) != 14 && m == m0) {
+				i = pliptransmit(iobase, mtod(m, u_char *), 14);
+				if (i < 0) goto retry;
+				cksum += i;
+				i = pliptransmit(iobase, mtod(m, u_char *)+16, m->m_len-16);
+				if (i < 0) goto retry;
+			}
+			else			         
+				i = pliptransmit(iobase, mtod(m, u_char *), m->m_len);
+			if (i < 0) goto retry;
+			cksum += i;
+		}
+		if (pliptransmit(iobase, &cksum, 1) < 0) goto retry;
+		i = PLIPMXSPIN2;
+		while ((inb(PLIP_STATUS) & LPS_NBSY) == 0)
+			if (i-- < 0) goto retry;
+
+		outb(iobase + lpt_data, 0x00);
+/* Re-enable ints */
+
+		outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
+
+		ifp->if_opackets++;
+		ifp->if_obytes += len + 4;
+		sc->sc_ifretry = 0;
+		s = splimp();
+		m_freem(m0);
+		splx(s);
+	}
+	ifp->if_flags &= ~IFF_OACTIVE;
+	return;
+
+retry:
+#if PLIP_DEBUG > 0
+	if (plip_debug & PLIP_DEBUG_TX)
+		printf("retry: %02x", inb(iobase + lpt_status));
+#endif
+	if (inb(PLIP_STATUS & LPS_NACK))
+		ifp->if_collisions++;
+	else
+		ifp->if_oerrors++;
+	if ((ifp->if_flags & (IFF_RUNNING | IFF_UP)) == (IFF_RUNNING | IFF_UP)
+	    && sc->sc_ifretry < PLIPMXRETRY) {
+		sc->sc_ifretry++;
+		s = splimp();
+		IF_PREPEND(&ifp->if_snd, m0);
+		splx(s);
+		timeout((void (*)(void *))plipstart, ifp, PLIPRETRY);
+	} else {
+		if (sc->sc_ifretry == PLIPMXRETRY) {
+			sc->sc_ifretry++;
+			log(LOG_NOTICE, "plip%d: tx hard error\n", ifp->if_unit);
+		}
+		s = splimp();
+		m_freem(m0);
+		splx(s);
+	}
+	ifp->if_flags &= ~IFF_OACTIVE;
+		outb(PLIP_DATA, 0x00);
+
+/* Re-enable ints */
+
+		outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
+/*xxx	if (sc->sc_iferrs > PLIPMXERRS)
+		i8255->port_a |= LPA_ACTIVE;
+	else
+		i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;*/
+	return;
+}
+
+#endif