- generic Arcnet framework

- device driver for SMC COM90cx6 Arcnet network adapters

Obtained from:	NetBSD

4 files changed, 1400 insertions, 0 deletions

diff --git a/sys/dev/cm/if_cm_isa.c b/sys/dev/cm/if_cm_isa.c
new file mode 100644
index 0000000..8af2dff
--- /dev/null
+++ b/sys/dev/cm/if_cm_isa.c
@@ -0,0 +1,135 @@
+/*	$NetBSD: if_bah_zbus.c,v 1.6 2000/01/23 21:06:12 aymeric Exp $ */
+/*	$FreeBSD$ */
+
+/*-
+ * Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Ignatios Souvatzis.
+ *
+ * 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 product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/socket.h>
+#include <sys/kernel.h>
+
+#include <sys/module.h>
+#include <sys/bus.h>
+
+#include <machine/bus.h>
+
+#include <net/if.h>
+#include <net/if_arc.h>
+
+#include <dev/cm/smc90cx6var.h>
+
+static int cm_isa_probe		__P((device_t));
+static int cm_isa_attach	__P((device_t));
+
+static int
+cm_isa_probe(dev)
+	device_t dev;
+{
+	struct cm_softc *sc = device_get_softc(dev);
+	int error;
+
+	bzero(sc, sizeof(struct cm_softc));
+
+	error = cm_probe(dev);
+	if (error == 0)
+		goto end;
+
+end:
+	if (error == 0)
+		error = cm_alloc_irq(dev, 0);
+
+	cm_release_resources(dev);
+	return (error);
+}
+
+static int
+cm_isa_attach(dev)
+	device_t dev;
+{
+	struct cm_softc *sc = device_get_softc(dev);
+	int error;
+
+	cm_alloc_port(dev, sc->port_rid, sc->port_used);
+	cm_alloc_memory(dev, sc->mem_rid, sc->mem_used);
+	cm_alloc_irq(dev, sc->irq_rid);
+
+	error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
+			       cmintr, sc, &sc->irq_handle);
+	if (error) {
+		cm_release_resources(dev);
+		return (error);
+	}
+
+	return cm_attach(sc, device_get_unit(dev));
+}
+
+static int
+cm_isa_detach(device_t dev)
+{
+	struct cm_softc *sc = device_get_softc(dev);
+	struct ifnet *ifp = &sc->sc_arccom.ac_if;
+	int s;
+
+	cm_stop(sc);
+	ifp->if_flags &= ~IFF_RUNNING;
+
+	s = splimp();
+	arc_ifdetach(&sc->sc_arccom.ac_if);
+	splx(s);
+
+	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
+	cm_release_resources(dev);
+
+	return (0);
+}
+
+static device_method_t cm_isa_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		cm_isa_probe),
+	DEVMETHOD(device_attach,	cm_isa_attach),
+	DEVMETHOD(device_detach,	cm_isa_detach),
+
+	{ 0, 0 }
+};
+
+static driver_t cm_isa_driver = {
+	"cm",
+	cm_isa_methods,
+	sizeof(struct cm_softc)
+};
+
+DRIVER_MODULE(if_cm, isa, cm_isa_driver, cm_devclass, 0, 0);
diff --git a/sys/dev/cm/smc90cx6.c b/sys/dev/cm/smc90cx6.c
new file mode 100644
index 0000000..a5dfb9c
--- /dev/null
+++ b/sys/dev/cm/smc90cx6.c
@@ -0,0 +1,1071 @@
+/*	$NetBSD: smc90cx6.c,v 1.38 2001/07/07 15:57:53 thorpej Exp $ */
+/*	$FreeBSD$ */
+
+/*-
+ * Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Ignatios Souvatzis.
+ *
+ * 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 product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+/*
+ * Chip core driver for the SMC90c26 / SMC90c56 (and SMC90c66 in '56
+ * compatibility mode) boards
+ */
+
+/* #define CMSOFTCOPY */
+#define CMRETRANSMIT /**/
+#undef CM_DEBUG
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sockio.h>
+#include <sys/mbuf.h>
+#include <sys/module.h>
+#include <sys/kernel.h>
+#include <sys/socket.h>
+#include <sys/syslog.h>
+#include <sys/bus.h>
+
+#include <machine/bus.h>
+#include <sys/rman.h>
+#include <machine/resource.h>
+
+#if __FreeBSD_version < 500000
+#include <machine/clock.h>
+#endif
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+#include <net/if_arc.h>
+#include <net/bpf.h>
+
+#if 0
+#if NBPFILTER > 0
+#include <net/bpfdesc.h>
+#endif
+#endif
+
+#include <dev/cm/smc90cx6reg.h>
+#include <dev/cm/smc90cx6var.h>
+
+MODULE_DEPEND(if_cm, arcnet, 1, 1, 1);
+
+/* these should be elsewhere */
+
+#define ARC_MIN_LEN 1
+#define ARC_MIN_FORBID_LEN 254
+#define ARC_MAX_FORBID_LEN 256
+#define ARC_MAX_LEN 508
+#define ARC_ADDR_LEN 1
+
+/* for watchdog timer. This should be more than enough. */
+#define ARCTIMEOUT (5*IFNET_SLOWHZ)
+
+/* short notation */
+
+#define GETREG(off)							\
+	bus_space_read_1(rman_get_bustag((sc)->port_res),		\
+			 rman_get_bushandle((sc)->port_res),		\
+			 (off))
+#define PUTREG(off, value)						\
+	bus_space_write_1(rman_get_bustag((sc)->port_res),		\
+			  rman_get_bushandle((sc)->port_res),		\
+			  (off), (value))
+#define GETMEM(off)							\
+	bus_space_read_1(rman_get_bustag((sc)->mem_res),		\
+			 rman_get_bushandle((sc)->mem_res),		\
+			 (off))
+#define PUTMEM(off, value)						\
+	bus_space_write_1(rman_get_bustag((sc)->mem_res),		\
+			  rman_get_bushandle((sc)->mem_res),		\
+			  (off), (value))
+
+devclass_t cm_devclass;
+
+/*
+ * This currently uses 2 bufs for tx, 2 for rx
+ *
+ * New rx protocol:
+ *
+ * rx has a fillcount variable. If fillcount > (NRXBUF-1),
+ * rx can be switched off from rx hard int.
+ * Else rx is restarted on the other receiver.
+ * rx soft int counts down. if it is == (NRXBUF-1), it restarts
+ * the receiver.
+ * To ensure packet ordering (we need that for 1201 later), we have a counter
+ * which is incremented modulo 256 on each receive and a per buffer
+ * variable, which is set to the counter on filling. The soft int can
+ * compare both values to determine the older packet.
+ *
+ * Transmit direction:
+ *
+ * cm_start checks tx_fillcount
+ * case 2: return
+ *
+ * else fill tx_act ^ 1 && inc tx_fillcount
+ *
+ * check tx_fillcount again.
+ * case 2: set IFF_OACTIVE to stop arc_output from filling us.
+ * case 1: start tx
+ *
+ * tint clears IFF_OCATIVE, decrements and checks tx_fillcount
+ * case 1: start tx on tx_act ^ 1, softcall cm_start
+ * case 0: softcall cm_start
+ *
+ * #define fill(i) get mbuf && copy mbuf to chip(i)
+ */
+
+void	cm_init __P((void *));
+void	cm_reset __P((struct cm_softc *));
+void	cm_start __P((struct ifnet *));
+int	cm_ioctl __P((struct ifnet *, unsigned long, caddr_t));
+void	cm_watchdog __P((struct ifnet *));
+void	cm_srint __P((void *vsc));
+static	void cm_tint __P((struct cm_softc *, int));
+void	cm_reconwatch(void *);
+
+int
+cm_probe(dev)
+	device_t dev;
+{
+	int error;
+	struct cm_softc *sc = device_get_softc(dev);
+
+	error = cm_alloc_port(dev, 0, CM_IO_PORTS);
+	if (error)
+		return error;
+
+	if (GETREG(CMSTAT) == 0xff)
+		return ENXIO;
+
+	error = cm_alloc_memory(dev, 0, 0x800);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+/*
+ * Allocate a port resource with the given resource id.
+ */
+int
+cm_alloc_port(dev, rid, size)
+	device_t dev;
+	int rid;
+	int size;
+{
+	struct cm_softc *sc = device_get_softc(dev);
+	struct resource *res;
+
+	res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
+				 0ul, ~0ul, size, RF_ACTIVE);
+	if (res) {
+		sc->port_rid = rid;
+		sc->port_res = res;
+		sc->port_used = size;
+		return (0);
+	} else {
+		return (ENOENT);
+	}
+}
+
+/*
+ * Allocate a memory resource with the given resource id.
+ */
+int
+cm_alloc_memory(dev, rid, size)
+	device_t dev;
+	int rid;
+	int size;
+{
+	struct cm_softc *sc = device_get_softc(dev);
+	struct resource *res;
+
+	res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
+				 0ul, ~0ul, size, RF_ACTIVE);
+	if (res) {
+		sc->mem_rid = rid;
+		sc->mem_res = res;
+		sc->mem_used = size;
+		return (0);
+	} else {
+		return (ENOENT);
+	}
+}
+
+/*
+ * Allocate an irq resource with the given resource id.
+ */
+int
+cm_alloc_irq(dev, rid)
+	device_t dev;
+	int rid;
+{
+	struct cm_softc *sc = device_get_softc(dev);
+	struct resource *res;
+
+	res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
+				 0ul, ~0ul, 1, RF_ACTIVE);
+	if (res) {
+		sc->irq_rid = rid;
+		sc->irq_res = res;
+		return (0);
+	} else {
+		return (ENOENT);
+	}
+}
+
+/*
+ * Release all resources
+ */
+void
+cm_release_resources(dev)
+	device_t dev;
+{
+	struct cm_softc *sc = device_get_softc(dev);
+
+	if (sc->port_res) {
+		bus_deactivate_resource(dev, SYS_RES_IOPORT,
+				     sc->port_rid, sc->port_res);
+		bus_release_resource(dev, SYS_RES_IOPORT,
+				     sc->port_rid, sc->port_res);
+		sc->port_res = 0;
+	}
+	if (sc->mem_res) {
+		bus_deactivate_resource(dev, SYS_RES_MEMORY,
+				     sc->mem_rid, sc->mem_res);
+		bus_release_resource(dev, SYS_RES_MEMORY,
+				     sc->mem_rid, sc->mem_res);
+		sc->mem_res = 0;
+	}
+	if (sc->irq_res) {
+		bus_deactivate_resource(dev, SYS_RES_IRQ,
+				     sc->irq_rid, sc->irq_res);
+		bus_release_resource(dev, SYS_RES_IRQ,
+				     sc->irq_rid, sc->irq_res);
+		sc->irq_res = 0;
+	}
+}
+
+int
+cm_attach(sc, unit)
+	struct cm_softc *sc;
+	int unit;
+{
+	struct ifnet *ifp = &sc->sc_arccom.ac_if;
+	int s;
+	u_int8_t linkaddress;
+
+	s = splhigh();
+
+	/*
+	 * read the arcnet address from the board
+	 */
+
+	GETREG(CMRESET);
+	do {
+		DELAY(200);
+	} while (!(GETREG(CMSTAT) & CM_POR));
+
+	linkaddress = GETMEM(CMMACOFF);
+
+	/* clear the int mask... */
+
+	sc->sc_intmask = 0;
+	PUTREG(CMSTAT, 0);
+
+	PUTREG(CMCMD, CM_CONF(CONF_LONG));
+	PUTREG(CMCMD, CM_CLR(CLR_POR|CLR_RECONFIG));
+	sc->sc_recontime = sc->sc_reconcount = 0;
+
+	/* and reenable kernel int level */
+	splx(s);
+
+	/*
+	 * set interface to stopped condition (reset)
+	 */
+	cm_stop(sc);
+
+	if (!ifp->if_name) {
+		ifp->if_softc = sc;
+		ifp->if_unit = unit;
+		ifp->if_name = "cm";
+		ifp->if_output = arc_output;
+		ifp->if_start = cm_start;
+		ifp->if_ioctl = cm_ioctl;
+		ifp->if_watchdog  = cm_watchdog;
+		ifp->if_init = cm_init;
+		/* XXX IFQ_SET_READY(&ifp->if_snd); */
+		ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
+		ifp->if_timer = 0;
+		ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
+
+		arc_ifattach(ifp, linkaddress);
+
+#ifdef CMSOFTCOPY
+		sc->sc_rxcookie = softintr_establish(IPL_SOFTNET, cm_srint, sc);
+		sc->sc_txcookie = softintr_establish(IPL_SOFTNET,
+			(void (*) __P((void *)))cm_start, ifp);
+#endif
+
+#if __FreeBSD_version < 500000
+		callout_init(&sc->sc_recon_ch);
+#else
+		callout_init(&sc->sc_recon_ch, 0);
+#endif
+	}
+
+	printf("%s%d: link addr 0x%02x(%d)\n",
+	       ifp->if_name, ifp->if_unit, linkaddress, linkaddress);
+	return 0;
+}
+
+/*
+ * Initialize device
+ *
+ */
+void
+cm_init(xsc)
+	void *xsc;
+{
+	struct cm_softc *sc = (struct cm_softc *)xsc;
+	struct ifnet *ifp;
+	int s;
+
+	ifp = &sc->sc_arccom.ac_if;
+
+	if ((ifp->if_flags & IFF_RUNNING) == 0) {
+		s = splimp();
+		ifp->if_flags |= IFF_RUNNING;
+		cm_reset(sc);
+		cm_start(ifp);
+		splx(s);
+	}
+}
+
+/*
+ * Reset the interface...
+ *
+ * this assumes that it is called inside a critical section...
+ *
+ */
+void
+cm_reset(sc)
+	struct cm_softc *sc;
+{
+	struct ifnet *ifp;
+	int linkaddress;
+
+	ifp = &sc->sc_arccom.ac_if;
+
+#ifdef CM_DEBUG
+	printf("%s%d: reset\n", ifp->if_name, ifp->if_unit);
+#endif
+	/* stop and restart hardware */
+
+	GETREG(CMRESET);
+	do {
+		DELAY(200);
+	} while (!(GETREG(CMSTAT) & CM_POR));
+
+	linkaddress = GETMEM(CMMACOFF);
+
+#if defined(CM_DEBUG) && (CM_DEBUG > 2)
+	printf("%s%d: reset: card reset, link addr = 0x%02x (%d)\n",
+	    ifp->if_name, ifp->if_unit, linkaddress, linkaddress);
+#endif
+
+	/* tell the routing level about the (possibly changed) link address */
+	arc_storelladdr(ifp, linkaddress);
+	arc_frag_init(ifp);
+
+	/* POR is NMI, but we need it below: */
+	sc->sc_intmask = CM_RECON|CM_POR;
+	PUTREG(CMSTAT, sc->sc_intmask);
+	PUTREG(CMCMD, CM_CONF(CONF_LONG));
+
+#ifdef CM_DEBUG
+	printf("%s%d: reset: chip configured, status=0x%02x\n",
+	    ifp->if_name, ifp->if_unit, GETREG(CMSTAT));
+#endif
+	PUTREG(CMCMD, CM_CLR(CLR_POR|CLR_RECONFIG));
+
+#ifdef CM_DEBUG
+	printf("%s%d: reset: bits cleared, status=0x%02x\n",
+	    ifp->if_name, ifp->if_unit, GETREG(CMSTAT));
+#endif
+
+	sc->sc_reconcount_excessive = ARC_EXCESSIVE_RECONS;
+
+	/* start receiver */
+
+	sc->sc_intmask  |= CM_RI;
+	sc->sc_rx_fillcount = 0;
+	sc->sc_rx_act = 2;
+
+	PUTREG(CMCMD, CM_RXBC(2));
+	PUTREG(CMSTAT, sc->sc_intmask);
+
+#ifdef CM_DEBUG
+	printf("%s%d: reset: started receiver, status=0x%02x\n",
+	    ifp->if_name, ifp->if_unit, GETREG(CMSTAT));
+#endif
+
+	/* and init transmitter status */
+	sc->sc_tx_act = 0;
+	sc->sc_tx_fillcount = 0;
+
+	ifp->if_flags |= IFF_RUNNING;
+	ifp->if_flags &= ~IFF_OACTIVE;
+
+	cm_start(ifp);
+}
+
+/*
+ * Take interface offline
+ */
+void
+cm_stop(sc)
+	struct cm_softc *sc;
+{
+	/* Stop the interrupts */
+	PUTREG(CMSTAT, 0);
+
+	/* Stop the interface */
+	GETREG(CMRESET);
+
+	/* Stop watchdog timer */
+	sc->sc_arccom.ac_if.if_timer = 0;
+}
+
+/*
+ * Start output on interface. Get another datagram to send
+ * off the interface queue, and copy it to the
+ * interface becore starting the output
+ *
+ * this assumes that it is called inside a critical section...
+ * XXX hm... does it still?
+ *
+ */
+void
+cm_start(ifp)
+	struct ifnet *ifp;
+{
+	struct cm_softc *sc = ifp->if_softc;
+	struct mbuf *m,*mp;
+
+	int cm_ram_ptr;
+	int len, tlen, offset, s, buffer;
+#ifdef CMTIMINGS
+	u_long copystart, lencopy, perbyte;
+#endif
+
+#if defined(CM_DEBUG) && (CM_DEBUG > 3)
+	printf("%s%d: start(%p)\n", ifp->if_name, ifp->if_unit, ifp);
+#endif
+
+	if ((ifp->if_flags & IFF_RUNNING) == 0)
+		return;
+
+	s = splimp();
+
+	if (sc->sc_tx_fillcount >= 2) {
+		splx(s);
+		return;
+	}
+
+	m = arc_frag_next(ifp);
+	buffer = sc->sc_tx_act ^ 1;
+
+	splx(s);
+
+	if (m == 0)
+		return;
+
+	/*
+	 * If bpf is listening on this interface, let it
+	 * see the packet before we commit it to the wire
+	 *
+	 * (can't give the copy in A2060 card RAM to bpf, because
+	 * that RAM is just accessed as on every other byte)
+	 */
+	if (ifp->if_bpf)
+		bpf_mtap(ifp, m);
+
+#ifdef CM_DEBUG
+	if (m->m_len < ARC_HDRLEN)
+		m = m_pullup(m, ARC_HDRLEN);/* gcc does structure padding */
+	printf("%s%d: start: filling %d from %d to %d type %d\n",
+	    ifp->if_name, ifp->if_unit, buffer, mtod(m, u_char *)[0],
+	    mtod(m, u_char *)[1], mtod(m, u_char *)[2]);
+#else
+	if (m->m_len < 2)
+		m = m_pullup(m, 2);
+#endif
+	cm_ram_ptr = buffer*512;
+
+	if (m == 0)
+		return;
+
+	/* write the addresses to RAM and throw them away */
+
+	/*
+	 * Hardware does this: Yet Another Microsecond Saved.
+	 * (btw, timing code says usually 2 microseconds)
+	 * PUTMEM(cm_ram_ptr + 0, mtod(m, u_char *)[0]);
+	 */
+
+	PUTMEM(cm_ram_ptr + 1, mtod(m, u_char *)[1]);
+	m_adj(m, 2);
+
+	/* get total length left at this point */
+	tlen = m->m_pkthdr.len;
+	if (tlen < ARC_MIN_FORBID_LEN) {
+		offset = 256 - tlen;
+		PUTMEM(cm_ram_ptr + 2, offset);
+	} else {
+		PUTMEM(cm_ram_ptr + 2, 0);
+		if (tlen <= ARC_MAX_FORBID_LEN)
+			offset = 255;		/* !!! */
+		else {
+			if (tlen > ARC_MAX_LEN)
+				tlen = ARC_MAX_LEN;
+			offset = 512 - tlen;
+		}
+		PUTMEM(cm_ram_ptr + 3, offset);
+
+	}
+	cm_ram_ptr += offset;
+
+	/* lets loop through the mbuf chain */
+
+	for (mp = m; mp; mp = mp->m_next) {
+		if ((len = mp->m_len)) {		/* YAMS */
+			bus_space_write_region_1(
+			    rman_get_bustag(sc->mem_res),
+			    rman_get_bushandle(sc->mem_res),
+			    cm_ram_ptr, mtod(mp, caddr_t), len);
+
+			cm_ram_ptr += len;
+		}
+	}
+
+	sc->sc_broadcast[buffer] = (m->m_flags & M_BCAST) != 0;
+	sc->sc_retransmits[buffer] = (m->m_flags & M_BCAST) ? 1 : 5;
+
+	/* actually transmit the packet */
+	s = splimp();
+
+	if (++sc->sc_tx_fillcount > 1) {
+		/*
+		 * We are filled up to the rim. No more bufs for the moment,
+		 * please.
+		 */
+		ifp->if_flags |= IFF_OACTIVE;
+	} else {
+#ifdef CM_DEBUG
+		printf("%s%d: start: starting transmitter on buffer %d\n",
+		    ifp->if_name, ifp->if_unit, buffer);
+#endif
+		/* Transmitter was off, start it */
+		sc->sc_tx_act = buffer;
+
+		/*
+		 * We still can accept another buf, so don't:
+		 * ifp->if_flags |= IFF_OACTIVE;
+		 */
+		sc->sc_intmask |= CM_TA;
+		PUTREG(CMCMD, CM_TX(buffer));
+		PUTREG(CMSTAT, sc->sc_intmask);
+
+		sc->sc_arccom.ac_if.if_timer = ARCTIMEOUT;
+	}
+	splx(s);
+	m_freem(m);
+
+	/*
+	 * After 10 times reading the docs, I realized
+	 * that in the case the receiver NAKs the buffer request,
+	 * the hardware retries till shutdown.
+	 * This is integrated now in the code above.
+	 */
+
+	return;
+}
+
+/*
+ * Arcnet interface receiver soft interrupt:
+ * get the stuff out of any filled buffer we find.
+ */
+void
+cm_srint(vsc)
+	void *vsc;
+{
+	struct cm_softc *sc = (struct cm_softc *)vsc;
+	int buffer, len, offset, s, type;
+	int cm_ram_ptr;
+	struct mbuf *m;
+	struct arc_header *ah;
+	struct ifnet *ifp;
+
+	ifp = &sc->sc_arccom.ac_if;
+
+	s = splimp();
+	buffer = sc->sc_rx_act ^ 1;
+	splx(s);
+
+	/* Allocate header mbuf */
+	MGETHDR(m, M_DONTWAIT, MT_DATA);
+
+	if (m == 0) {
+		/*
+		 * in case s.th. goes wrong with mem, drop it
+		 * to make sure the receiver can be started again
+		 * count it as input error (we dont have any other
+		 * detectable)
+		 */
+		ifp->if_ierrors++;
+		goto cleanup;
+	}
+
+	m->m_pkthdr.rcvif = ifp;
+
+	/*
+	 * Align so that IP packet will be longword aligned. Here we
+	 * assume that m_data of new packet is longword aligned.
+	 * When implementing PHDS, we might have to change it to 2,
+	 * (2*sizeof(ulong) - CM_HDRNEWLEN)), packet type dependent.
+	 */
+
+	cm_ram_ptr = buffer*512;
+	offset = GETMEM(cm_ram_ptr + 2);
+	if (offset)
+		len = 256 - offset;
+	else {
+		offset = GETMEM(cm_ram_ptr + 3);
+		len = 512 - offset;
+	}
+
+	/*
+	 * first +2 bytes for align fixup below
+	 * second +2 bytes are for src/dst addresses
+	 */
+	if ((len + 2 + 2) > MHLEN) {
+		/* attach an mbuf cluster */
+		MCLGET(m, M_DONTWAIT);
+
+		/* Insist on getting a cluster */
+		if ((m->m_flags & M_EXT) == 0) {
+			ifp->if_ierrors++;
+			goto cleanup;
+		}
+	}
+
+	if (m == 0) {
+		ifp->if_ierrors++;
+		goto cleanup;
+	}
+
+	type = GETMEM(cm_ram_ptr + offset);
+	m->m_data += 1 + arc_isphds(type);
+	/* mbuf filled with ARCnet addresses */
+	m->m_pkthdr.len = m->m_len = len + 2;
+
+	ah = mtod(m, struct arc_header *);
+	ah->arc_shost = GETMEM(cm_ram_ptr + 0);
+	ah->arc_dhost = GETMEM(cm_ram_ptr + 1);
+
+	bus_space_read_region_1(
+	    rman_get_bustag(sc->mem_res), rman_get_bushandle(sc->mem_res),
+	    cm_ram_ptr + offset, mtod(m, u_char *) + 2, len);
+
+	arc_input(ifp, m);
+
+	m = NULL;
+	ifp->if_ipackets++;
+
+cleanup:
+
+	if (m != NULL)
+		m_freem(m);
+
+	/* mark buffer as invalid by source id 0 */
+	PUTMEM(buffer << 9, 0);
+	s = splimp();
+
+	if (--sc->sc_rx_fillcount == 2 - 1) {
+
+		/* was off, restart it on buffer just emptied */
+		sc->sc_rx_act = buffer;
+		sc->sc_intmask |= CM_RI;
+
+		/* this also clears the RI flag interupt: */
+		PUTREG(CMCMD, CM_RXBC(buffer));
+		PUTREG(CMSTAT, sc->sc_intmask);
+
+#ifdef CM_DEBUG
+		printf("%s%d: srint: restarted rx on buf %d\n",
+		    ifp->if_name, ifp->if_unit, buffer);
+#endif
+	}
+	splx(s);
+}
+
+__inline static void
+cm_tint(sc, isr)
+	struct cm_softc *sc;
+	int isr;
+{
+	struct ifnet *ifp;
+
+	int buffer;
+#ifdef CMTIMINGS
+	int clknow;
+#endif
+
+	ifp = &(sc->sc_arccom.ac_if);
+	buffer = sc->sc_tx_act;
+
+	/*
+	 * retransmit code:
+	 * Normal situtations first for fast path:
+	 * If acknowledgement received ok or broadcast, we're ok.
+	 * else if
+	 */
+
+	if (isr & CM_TMA || sc->sc_broadcast[buffer])
+		sc->sc_arccom.ac_if.if_opackets++;
+#ifdef CMRETRANSMIT
+	else if (ifp->if_flags & IFF_LINK2 && ifp->if_timer > 0
+	    && --sc->sc_retransmits[buffer] > 0) {
+		/* retransmit same buffer */
+		PUTREG(CMCMD, CM_TX(buffer));
+		return;
+	}
+#endif
+	else
+		ifp->if_oerrors++;
+
+
+	/* We know we can accept another buffer at this point. */
+	ifp->if_flags &= ~IFF_OACTIVE;
+
+	if (--sc->sc_tx_fillcount > 0) {
+
+		/*
+		 * start tx on other buffer.
+		 * This also clears the int flag
+		 */
+		buffer ^= 1;
+		sc->sc_tx_act = buffer;
+
+		/*
+		 * already given:
+		 * sc->sc_intmask |= CM_TA;
+		 * PUTREG(CMSTAT, sc->sc_intmask);
+		 */
+		PUTREG(CMCMD, CM_TX(buffer));
+		/* init watchdog timer */
+		ifp->if_timer = ARCTIMEOUT;
+
+#if defined(CM_DEBUG) && (CM_DEBUG > 1)
+		printf("%s%d: tint: starting tx on buffer %d, status 0x%02x\n",
+		    ifp->if_name, ifp->if_unit, buffer, GETREG(CMSTAT));
+#endif
+	} else {
+		/* have to disable TX interrupt */
+		sc->sc_intmask &= ~CM_TA;
+		PUTREG(CMSTAT, sc->sc_intmask);
+		/* ... and watchdog timer */
+		ifp->if_timer = 0;
+
+#ifdef CM_DEBUG
+		printf("%s%d: tint: no more buffers to send, status 0x%02x\n",
+		    ifp->if_name, ifp->if_unit, GETREG(CMSTAT));
+#endif
+	}
+
+	/* XXXX TODO */
+#ifdef CMSOFTCOPY
+	/* schedule soft int to fill a new buffer for us */
+	softintr_schedule(sc->sc_txcookie);
+#else
+	/* call it directly */
+	cm_start(ifp);
+#endif
+}
+
+/*
+ * Our interrupt routine
+ */
+void
+cmintr(arg)
+	void *arg;
+{
+	struct cm_softc *sc = arg;
+	struct ifnet *ifp = &sc->sc_arccom.ac_if;
+
+	u_char isr, maskedisr;
+	int buffer;
+	u_long newsec;
+
+	isr = GETREG(CMSTAT);
+	maskedisr = isr & sc->sc_intmask;
+	if (!maskedisr)
+		return;
+	do {
+
+#if defined(CM_DEBUG) && (CM_DEBUG>1)
+		printf("%s%d: intr: status 0x%02x, intmask 0x%02x\n",
+		    ifp->if_name, ifp->if_unit, isr, sc->sc_intmask);
+#endif
+
+		if (maskedisr & CM_POR) {
+			/*
+			 * XXX We should never see this. Don't bother to store
+			 * the address.
+			 * sc->sc_arccom.ac_anaddr = GETMEM(CMMACOFF);
+			 */
+			PUTREG(CMCMD, CM_CLR(CLR_POR));
+			log(LOG_WARNING,
+			    "%s%d: intr: got spurious power on reset int\n",
+			    ifp->if_name, ifp->if_unit);
+		}
+
+		if (maskedisr & CM_RECON) {
+			/*
+			 * we dont need to:
+			 * PUTREG(CMCMD, CM_CONF(CONF_LONG));
+			 */
+			PUTREG(CMCMD, CM_CLR(CLR_RECONFIG));
+			sc->sc_arccom.ac_if.if_collisions++;
+
+			/*
+			 * If less than 2 seconds per reconfig:
+			 *	If ARC_EXCESSIVE_RECONFIGS
+			 *	since last burst, complain and set treshold for
+			 *	warnings to ARC_EXCESSIVE_RECONS_REWARN.
+			 *
+			 * This allows for, e.g., new stations on the cable, or
+			 * cable switching as long as it is over after
+			 * (normally) 16 seconds.
+			 *
+			 * XXX TODO: check timeout bits in status word and
+			 * double time if necessary.
+			 */
+
+			callout_stop(&sc->sc_recon_ch);
+			newsec = time_second;
+			if ((newsec - sc->sc_recontime <= 2) &&
+			    (++sc->sc_reconcount == ARC_EXCESSIVE_RECONS)) {
+				log(LOG_WARNING,
+				    "%s%d: excessive token losses, "
+				    "cable problem?\n",
+				    ifp->if_name, ifp->if_unit);
+			}
+			sc->sc_recontime = newsec;
+			callout_reset(&sc->sc_recon_ch, 15 * hz,
+			    cm_reconwatch, (void *)sc);
+		}
+
+		if (maskedisr & CM_RI) {
+#if defined(CM_DEBUG) && (CM_DEBUG > 1)
+			printf("%s%d: intr: hard rint, act %d\n",
+			    ifp->if_name, ifp->if_unit, sc->sc_rx_act);
+#endif
+
+			buffer = sc->sc_rx_act;
+			/* look if buffer is marked invalid: */
+			if (GETMEM(buffer*512) == 0) {
+				/*
+				 * invalid marked buffer (or illegally
+				 * configured sender)
+				 */
+				log(LOG_WARNING,
+				    "%s%d: spurious RX interupt or sender 0 "
+				    " (ignored)\n", ifp->if_name, ifp->if_unit);
+				/*
+				 * restart receiver on same buffer.
+				 * XXX maybe better reset interface?
+				 */
+				PUTREG(CMCMD, CM_RXBC(buffer));
+			} else {
+				if (++sc->sc_rx_fillcount > 1) {
+					sc->sc_intmask &= ~CM_RI;
+					PUTREG(CMSTAT, sc->sc_intmask);
+				} else {
+					buffer ^= 1;
+					sc->sc_rx_act = buffer;
+
+					/*
+					 * Start receiver on other receive
+					 * buffer. This also clears the RI
+					 * interupt flag.
+					 */
+					PUTREG(CMCMD, CM_RXBC(buffer));
+					/* in RX intr, so mask is ok for RX */
+
+#ifdef CM_DEBUG
+					printf("%s%d: strt rx for buf %d, "
+					    "stat 0x%02x\n",
+					    ifp->if_name, ifp->if_unit,
+					    sc->sc_rx_act, GETREG(CMSTAT));
+#endif
+				}
+
+#ifdef CMSOFTCOPY
+				/*
+				 * this one starts a soft int to copy out
+				 * of the hw
+				 */
+				softintr_schedule(sc->sc_rxcookie);
+#else
+				/* this one does the copy here */
+				cm_srint(sc);
+#endif
+			}
+		}
+		if (maskedisr & CM_TA) {
+			cm_tint(sc, isr);
+		}
+		isr = GETREG(CMSTAT);
+		maskedisr = isr & sc->sc_intmask;
+	} while (maskedisr);
+#if defined(CM_DEBUG) && (CM_DEBUG>1)
+	printf("%s%d: intr (exit): status 0x%02x, intmask 0x%02x\n",
+	    ifp->if_name, ifp->if_unit, isr, sc->sc_intmask);
+#endif
+}
+
+void
+cm_reconwatch(arg)
+	void *arg;
+{
+	struct cm_softc *sc = arg;
+	struct ifnet *ifp = &sc->sc_arccom.ac_if;
+
+	if (sc->sc_reconcount >= ARC_EXCESSIVE_RECONS) {
+		sc->sc_reconcount = 0;
+		log(LOG_WARNING, "%s%d: token valid again.\n",
+		    ifp->if_name, ifp->if_unit);
+	}
+	sc->sc_reconcount = 0;
+}
+
+
+/*
+ * Process an ioctl request.
+ * This code needs some work - it looks pretty ugly.
+ */
+int
+cm_ioctl(ifp, command, data)
+	struct ifnet *ifp;
+	u_long command;
+	caddr_t data;
+{
+	struct cm_softc *sc;
+	struct ifaddr *ifa;
+	struct ifreq *ifr;
+	int s, error;
+
+	error = 0;
+	sc = ifp->if_softc;
+	ifa = (struct ifaddr *)data;
+	ifr = (struct ifreq *)data;
+	s = splimp();
+
+#if defined(CM_DEBUG) && (CM_DEBUG > 2)
+	printf("%s%d: ioctl() called, cmd = 0x%lx\n",
+	    ifp->if_name, ifp->if_unit, command);
+#endif
+
+	switch (command) {
+	case SIOCSIFADDR:
+	case SIOCADDMULTI:
+	case SIOCDELMULTI:
+	case SIOCSIFMTU:
+		error = arc_ioctl(ifp, command, data);
+		break;
+
+	case SIOCSIFFLAGS:
+		if ((ifp->if_flags & IFF_UP) == 0 &&
+		    (ifp->if_flags & IFF_RUNNING) != 0) {
+			/*
+			 * If interface is marked down and it is running,
+			 * then stop it.
+			 */
+			cm_stop(sc);
+			ifp->if_flags &= ~IFF_RUNNING;
+		} else if ((ifp->if_flags & IFF_UP) != 0 &&
+			   (ifp->if_flags & IFF_RUNNING) == 0) {
+			/*
+			 * If interface is marked up and it is stopped, then
+			 * start it.
+			 */
+			cm_init(sc);
+		}
+		break;
+
+	default:
+		error = EINVAL;
+		break;
+	}
+
+	splx(s);
+	return (error);
+}
+
+/*
+ * watchdog routine for transmitter.
+ *
+ * We need this, because else a receiver whose hardware is alive, but whose
+ * software has not enabled the Receiver, would make our hardware wait forever
+ * Discovered this after 20 times reading the docs.
+ *
+ * Only thing we do is disable transmitter. We'll get an transmit timeout,
+ * and the int handler will have to decide not to retransmit (in case
+ * retransmission is implemented).
+ *
+ * This one assumes being called inside splimp()
+ */
+
+void
+cm_watchdog(ifp)
+	struct ifnet *ifp;
+{
+	struct cm_softc *sc = ifp->if_softc;
+
+	PUTREG(CMCMD, CM_TXDIS);
+	return;
+}
diff --git a/sys/dev/cm/smc90cx6reg.h b/sys/dev/cm/smc90cx6reg.h
new file mode 100644
index 0000000..35e7afd
--- /dev/null
+++ b/sys/dev/cm/smc90cx6reg.h
@@ -0,0 +1,91 @@
+/*	$NetBSD: smc90cx6reg.h,v 1.7 1999/02/16 23:34:13 is Exp $ */
+/*	$FreeBSD$ */
+
+/*-
+ * Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Ignatios Souvatzis.
+ *
+ * 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 product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+/*
+ * chip offsets and bits for the SMC Arcnet chipset.
+ */
+
+#ifndef _SMC90CXVAR_H_
+#define _SMC90CXVAR_H_
+
+#define CM_IO_PORTS 16
+
+/* register offsets */
+
+#define CMSTAT	0
+#define	CMCMD	1
+#define CMRESET 8
+
+/* memory offsets */
+#define CMCHECKBYTE 0
+#define CMMACOFF 1
+
+#define CM_TXDIS	0x01
+#define CM_RXDIS	0x02
+#define CM_TX(x)	(0x03 | ((x)<<3))
+#define CM_RX(x)	(0x04 | ((x)<<3))
+#define CM_RXBC(x)	(0x84 | ((x)<<3))
+
+#define CM_CONF(x)	(0x05 | (x))
+#define CLR_POR		0x08
+#define CLR_RECONFIG	0x10
+
+#define CM_CLR(x)	(0x06 | (x))
+#define CONF_LONG	0x08
+#define CONF_SHORT	0x00
+
+/*
+ * These are not in the COM90C65 docs. Derived from the arcnet.asm
+ * packet driver by Philippe Prindeville and Russel Nelson.
+ */
+
+#define CM_LDTST(x)	(0x07 | (x))
+#define TEST_ON		0x08
+#define TEST_OFF	0x00
+
+#define CM_TA		1	/* int mask also */
+#define CM_TMA		2
+#define CM_RECON	4	/* int mask also */
+#define CM_TEST	8		/* not in the COM90C65 docs (see above) */
+#define CM_POR		0x10	/* non maskable interrupt */
+#define CM_ET1		0x20	/* timeout value bits, normally 1 */
+#define CM_ET2		0x40	/* timeout value bits, normally 1 */
+#define CM_RI		0x80	/* int mask also */
+
+#endif
diff --git a/sys/dev/cm/smc90cx6var.h b/sys/dev/cm/smc90cx6var.h
new file mode 100644
index 0000000..6d00b8f
--- /dev/null
+++ b/sys/dev/cm/smc90cx6var.h
@@ -0,0 +1,103 @@
+/*	$NetBSD: smc90cx6var.h,v 1.5 2000/03/23 07:01:32 thorpej Exp $	*/
+/*	$FreeBSD$ */
+
+/*-
+ * Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Ignatios Souvatzis.
+ *
+ * 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 product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+/*
+ * BAH (SMC 8bit ARCnet chipset) k/dpi
+ *
+ * The SMC 8bit ARCnet chip family uses a register and a memory window, which
+ * we get passed via bus_space_tags and bus_space_handles.
+ *
+ * As the reset functionality differs between the Amiga boards (using the
+ * 90c26 chip) and middle-aged ISA boards (using the 90c56 chip), we have
+ * a sc_reset callback function in the softc, which does a stop function
+ * (reset and leave dead) or a reset function depending on wether the 2nd
+ * parameter is 0 or 1.
+ */
+
+#ifndef _SMC90CX6VAR_H_
+#define _SMC90CX6VAR_H_
+
+#include <sys/callout.h>
+
+struct cm_softc {
+	struct	arccom	sc_arccom;	/* Common arcnet structures */
+
+	int	port_rid;		/* resource id for port range */
+	struct resource *port_res;	/* resource for port range */
+	int	port_used;		/* ports used */
+
+	int	mem_rid;		/* resource id for memory range */
+	struct resource *mem_res;	/* resource for memory range */
+	int	mem_used;		/* memory used */
+
+	int	irq_rid;		/* resource id for irq */
+	struct resource *irq_res;	/* resource for irq */
+	void *	irq_handle;		/* handle for irq handler */
+
+	void	*sc_rxcookie;		/* softcallback cookies */
+	void	*sc_txcookie;
+	struct callout sc_recon_ch;
+	u_long	sc_recontime;		/* seconds only, I'm lazy */
+	u_long	sc_reconcount;		/* for the above */
+	u_long	sc_reconcount_excessive; /* for the above */
+#define ARC_EXCESSIVE_RECONS 20
+#define ARC_EXCESSIVE_RECONS_REWARN 400
+	u_char	sc_intmask;
+	u_char	sc_rx_act;		/* 2..3 */
+	u_char	sc_tx_act;		/* 0..1 */
+	u_char	sc_rx_fillcount;
+	u_char	sc_tx_fillcount;
+	u_char	sc_broadcast[2];	/* is it a broadcast packet? */
+	u_char	sc_retransmits[2];	/* unused at the moment */
+};
+
+int	cm_attach __P((struct cm_softc *, int unit));
+void	cmintr __P((void *));
+
+int	cm_probe __P((device_t dev));
+void	cm_stop __P((struct cm_softc *sc));
+
+int	cm_alloc_port __P((device_t dev, int rid, int size));
+int	cm_alloc_memory __P((device_t dev, int rid, int size));
+int	cm_alloc_irq __P((device_t dev, int rid));
+void	cm_release_resources __P((device_t dev));
+
+extern	devclass_t cm_devclass;
+
+#endif