Token ring driver for Tropic based boards; from NetBSD.

This is as is in NetBSD. I've some mods in my tree ready to be merged.

For the records:
* This driver needs massive work to be ready for production (people is
invited to help, don't be shy). Rewrite part/whole is my list.
* IP isn't working at the moment. ARP handling needs several changes.
(remember this guys? maybe this time...)
* This only handle SNAP frames. IPX using IPX frames doesn't work (you
could receive but not transmit to be exact). In order to do that, dsap
needs to be changed. I don't know how to setup multiple dsap's at the
moment (don't worry about it now, our IPX code is going to be replaced
soon since the current implementation is buggy).
* Source routing is missing.
* tcpdump needs some hacking too (in my tree too).
* More things I'm probably forgetting now (haven't worked on this for
a while).

  Our networking code needs some cleanup and rearrangement (specially
the headers). net/if_ether.h is an example; arp is not ether specific.

3 files changed, 789 insertions, 0 deletions

diff --git a/sys/dev/isa/if_tr_isa.c b/sys/dev/isa/if_tr_isa.c
new file mode 100644
index 00000000000..bfd9bcfe485
--- /dev/null
+++ b/sys/dev/isa/if_tr_isa.c
@@ -0,0 +1,256 @@
+/*	$OpenBSD: if_tr_isa.c,v 1.1 1999/12/27 21:51:35 fgsch Exp $	*/
+/*	$NetBSD: if_tr_isa.c,v 1.4 1999/04/30 15:29:24 bad Exp $	*/
+
+#undef TRISADEBUG
+/*
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Onno van der Linden.
+ *
+ * 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/device.h>
+
+#include <net/if.h>
+#include <net/if_media.h>
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+
+#include <machine/cpu.h>
+#include <machine/bus.h>
+#include <machine/intr.h>
+
+#include <dev/isa/isavar.h>
+
+#include <dev/ic/tropicreg.h>
+#include <dev/ic/tropicvar.h>
+
+
+int	tr_isa_probe __P((struct device *, void *, void *));
+int	trtcm_isa_probe __P((struct device *, void *, void *));
+int	tribm_isa_probe __P((struct device *, void *, void *));
+void	tr_isa_attach __P((struct device *, struct device *, void *));
+int	tr_isa_map_io __P((struct isa_attach_args *, bus_space_handle_t *,
+	    bus_space_handle_t *));
+void	tr_isa_unmap_io __P((struct isa_attach_args *, bus_space_handle_t,
+	    bus_space_handle_t));
+int	trtcm_isa_mediachange __P((struct tr_softc *));
+void	trtcm_isa_mediastatus __P((struct tr_softc *, struct ifmediareq *));
+#ifdef TRISADEBUG
+void	tr_isa_dumpaip __P((bus_space_tag_t, bus_space_handle_t));
+#endif
+
+/*
+ * List of manufacturer specific probe routines.  Order is important.
+ */
+int	(*tr_isa_probe_list[])(struct device *, void *, void *) = {
+		trtcm_isa_probe,
+		tribm_isa_probe,
+		0
+	};
+
+struct cfattach tr_isa_ca = {
+	sizeof(struct tr_softc), tr_isa_probe, tr_isa_attach
+};
+
+int
+tr_isa_map_io(ia, pioh, mmioh)
+struct isa_attach_args *ia;
+bus_space_handle_t *pioh, *mmioh;
+{
+	bus_size_t mmio;
+	u_int8_t s;
+
+	if (bus_space_map(ia->ia_iot, ia->ia_iobase, ia->ia_iosize, 0, pioh)) {
+		printf("tr_isa_map_io: can't map PIO ports\n");
+		return 1;
+	}
+
+	/* Read adapter switches and calculate addresses of MMIO. */
+	s = bus_space_read_1(ia->ia_iot, *pioh, TR_SWITCH);
+
+	if ((s & 0xfc) < ((TR_MMIO_MINADDR - TR_MMIO_OFFSET) >> 11) ||
+	    (s & 0xfc) > ((TR_MMIO_MAXADDR - TR_MMIO_OFFSET) >> 11)) {
+		bus_space_unmap(ia->ia_iot, *pioh, ia->ia_iosize);
+		return 1;
+	}
+
+	mmio = ((s & 0xfc) << 11) + TR_MMIO_OFFSET;
+	if (bus_space_map(ia->ia_memt, mmio, TR_MMIO_SIZE, 0, mmioh)) {
+		printf("tr_isa_map_io: can't map MMIO region 0x%05lx/%d\n",
+			mmio, TR_MMIO_SIZE);
+		bus_space_unmap(ia->ia_iot, *pioh, ia->ia_iosize);
+		return 1;
+	}
+	return 0;
+}
+
+void
+tr_isa_unmap_io(ia, pioh, mmioh)
+struct isa_attach_args *ia;
+bus_space_handle_t pioh, mmioh;
+{
+	bus_space_unmap(ia->ia_memt, mmioh, TR_MMIO_SIZE);
+	bus_space_unmap(ia->ia_iot, pioh, ia->ia_iosize);
+}
+
+static u_char tr_isa_id[] = {
+	5, 0, 4, 9, 4, 3, 4, 15, 3, 6, 3, 1, 3, 1, 3, 0, 3, 9, 3, 9, 3, 0, 2, 0
+};
+
+/*
+ * XXX handle multiple IBM TR cards (sram mapping !!)
+ */
+
+int
+tr_isa_probe(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct isa_attach_args *ia = aux;
+	int	i;
+	bus_size_t	tr_id;
+	bus_space_handle_t sramh, pioh, mmioh;
+	int probecode;
+	int matched = 0;
+
+	for (i = 0; tr_isa_probe_list[i] != 0; i++) {
+		probecode = tr_isa_probe_list[i](parent, match, aux);
+		if (probecode < 0)
+			return 0;	/* Fail instantly. */
+		if (probecode > 0)
+			break;		/* We have a match. */
+	}
+	if (tr_isa_probe_list[i] == 0)
+		return 0;		/* Nothing matched. */
+	if (tr_isa_map_io(ia, &pioh, &mmioh))
+		return 0;
+	tr_id = TR_ID_OFFSET;
+	matched = 1;
+	for (i = 0; i < sizeof(tr_isa_id); i++) {
+		if (bus_space_read_1(ia->ia_memt, mmioh, tr_id) !=
+		    tr_isa_id[i])
+			matched = 0;
+		tr_id += 2;
+	}
+#ifdef TRISADEBUG
+	tr_isa_dumpaip(ia->ia_memt, mmioh);
+#endif
+	tr_isa_unmap_io(ia, pioh, mmioh);
+	if (!matched) {
+		return 0;
+	}
+	if (bus_space_map(ia->ia_memt, ia->ia_maddr, ia->ia_msize, 0, &sramh)) {
+		printf("tr_isa_probe: can't map shared ram\n");
+		return 0;
+	}
+	bus_space_unmap(ia->ia_memt, sramh, ia->ia_msize);
+	return 1;
+}
+
+int trtcm_setspeed(struct tr_softc *, int);
+
+void
+tr_isa_attach(parent, self, aux)
+	struct device *parent, *self;
+	void	*aux;
+{
+	struct tr_softc *sc = (void *) self;
+	struct isa_attach_args *ia = aux;
+
+	sc->sc_piot = ia->ia_iot;
+	sc->sc_memt = ia->ia_memt;
+	if (tr_isa_map_io(ia, &sc->sc_pioh, &sc->sc_mmioh)) {
+		printf("tr_isa_attach: IO space vanished\n");
+		return;
+	}
+	if (bus_space_map(sc->sc_memt, ia->ia_maddr, ia->ia_msize, 0,
+	    &sc->sc_sramh)) {
+		printf("tr_isa_attach: shared ram space vanished\n");
+		return;
+	}
+	/* set ACA offset */
+	sc->sc_aca = TR_ACA_OFFSET;
+	sc->sc_memwinsz = ia->ia_msize;
+	sc->sc_maddr = ia->ia_maddr;
+	/*
+	 * Determine total RAM on adapter and decide how much to use.
+	 * XXX Since we don't use RAM paging, use sc_memwinsz for now.
+	 */
+	sc->sc_memsize = sc->sc_memwinsz;
+	sc->sc_memreserved = 0;
+
+	if (tr_reset(sc) != 0)
+		return;
+
+	if (ia->ia_aux != NULL) {
+		sc->sc_mediastatus = trtcm_isa_mediastatus;
+		sc->sc_mediachange = trtcm_isa_mediachange;
+	}
+	else {
+		sc->sc_mediastatus = NULL;
+		sc->sc_mediachange = NULL;
+	}
+
+	if (tr_attach(sc) != 0)
+		return;
+
+/*
+ * XXX 3Com 619 can use LEVEL intr
+ */
+	sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
+	    IPL_NET, tr_intr, sc, sc->sc_dev.dv_xname);
+}
+
+#ifdef TRISADEBUG
+/*
+ * Dump the adapters AIP
+ */
+void
+tr_isa_dumpaip(memt, mmioh)
+	bus_space_tag_t memt;
+	bus_space_handle_t mmioh;
+{
+	unsigned int off, val;
+	printf("AIP contents:");
+	for (off=0; off < 256; off++) {
+		val = bus_space_read_1(memt, mmioh, TR_MAC_OFFSET + off);
+		if ((off % 16) == 0)
+			printf("\n");
+		printf("%02x ", val);
+	}
+	printf("\n");
+}
+#endif
diff --git a/sys/dev/isa/if_tribm_isa.c b/sys/dev/isa/if_tribm_isa.c
new file mode 100644
index 00000000000..69f92b688f9
--- /dev/null
+++ b/sys/dev/isa/if_tribm_isa.c
@@ -0,0 +1,174 @@
+/*	$OpenBSD: if_tribm_isa.c,v 1.1 1999/12/27 21:51:35 fgsch Exp $	*/
+/*	$NetBSD: if_tribm_isa.c,v 1.2 1999/03/22 23:01:37 bad Exp $	*/
+
+/*
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Onno van der Linden.
+ *
+ * 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/device.h>
+
+#include <net/if.h>
+#include <net/if_media.h>
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+
+#include <machine/bus.h>
+
+#include <dev/isa/isavar.h>
+
+#include <dev/ic/tropicreg.h>
+#include <dev/ic/tropicvar.h>
+
+int	tribm_isa_probe __P((struct device *, void *, void *));
+int	tr_isa_map_io __P((struct isa_attach_args *, bus_space_handle_t *,
+	    bus_space_handle_t *));
+void	tr_isa_unmap_io __P((struct isa_attach_args *, bus_space_handle_t,
+	    bus_space_handle_t));
+
+int
+tribm_isa_probe(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct isa_attach_args *ia = aux;
+	static int irq_f[4] = { 9, 3, 6, 7 };
+	static int irq_e[4] = { 9, 3, 10, 11 };
+	bus_space_tag_t piot = ia->ia_iot;
+	bus_space_tag_t memt = ia->ia_memt;
+	bus_space_handle_t pioh, mmioh;
+	int i, irq;
+	u_int8_t s;
+
+#ifdef notyet
+/* XXX Try both 0xa20 and 0xa24 and store that info like 3com */
+	if (ia->ia_iobase == IOBASEUNK)
+		ia->ia_iobase = 0xa20;
+#else
+	if (ia->ia_iobase == IOBASEUNK)
+		return 0;
+#endif
+
+	ia->ia_iosize = 4;
+	ia->ia_aux = NULL;
+
+	if (tr_isa_map_io(ia, &pioh, &mmioh))
+		return 0;
+
+/*
+ * F = Token-Ring Network PC Adapter
+ *     Token-Ring Network PC Adapter II
+ *     Token-Ring Network Adapter/A
+ * E = Token-Ring Network 16/4 Adapter/A (long card)
+ *     Token-Ring Network 16/4 Adapter
+ * D = Token-Ring Network 16/4 Adapter/A (short card)
+ *     16/4 ISA-16 Adapter
+ * C = Auto 16/4 Token-Ring ISA Adapter
+ *     Auto 16/4 Token-Ring MC Adapter
+ */
+/*
+ * XXX Both 0xD and 0xC types should be able to use 16-bit read and writes
+ */
+	switch (bus_space_read_1(memt, mmioh, TR_TYP_OFFSET)) {
+	case 0xF:
+	case 0xE:
+	case 0xD:
+		if (ia->ia_maddr == MADDRUNK)
+#ifdef notyet
+			ia->ia_maddr = TR_SRAM_DEFAULT;
+#else
+			return 0;
+#endif
+		break;
+	case 0xC:
+		i = bus_space_read_1(memt, mmioh, TR_ACA_OFFSET) << 12;
+		if (ia->ia_maddr == MADDRUNK)
+			ia->ia_maddr = i;
+		else if (ia->ia_maddr != i) {
+			printf(
+"tribm_isa_probe: sram mismatch; kernel configured %x != board configured %x\n",
+				ia->ia_maddr, i);
+			tr_isa_unmap_io(ia, pioh, mmioh);
+			return 0;
+		}
+		break;
+	default:
+		printf("tribm_isa_probe: unknown type code %x\n",
+		    bus_space_read_1(memt, mmioh, TR_TYP_OFFSET));
+		tr_isa_unmap_io(ia, pioh, mmioh);
+		return 0;
+	}
+
+	s = bus_space_read_1(piot, pioh, TR_SWITCH);
+
+	switch (bus_space_read_1(memt, mmioh, TR_IRQ_OFFSET)) {
+	case 0xF:
+		irq = irq_f[s & 3];
+		break;
+	case 0xE:
+		irq = irq_e[s & 3];
+		break;
+	default:
+		printf("tribm_isa_probe: Unknown IRQ code %x\n",
+		    bus_space_read_1(memt, mmioh, TR_IRQ_OFFSET));
+		tr_isa_unmap_io(ia, pioh, mmioh);
+		return 0;
+	}
+
+	if (ia->ia_irq == IRQUNK)
+		ia->ia_irq = irq;
+	else if (ia->ia_irq != irq) {
+		printf(
+"tribm_isa_probe: irq mismatch; kernel configured %d != board configured %d\n",
+			ia->ia_irq, irq);
+		tr_isa_unmap_io(ia, pioh, mmioh);
+		return 0;
+	}
+/*
+ * XXX 0x0c == MSIZEMASK (MSIZEBITS)
+ */
+	ia->ia_msize = 8192 <<
+	    ((bus_space_read_1(memt, mmioh, TR_ACA_OFFSET + 1) & 0x0c) >> 2);
+	tr_isa_unmap_io(ia, pioh, mmioh);
+	/* Check alignment of membase. */
+	if ((ia->ia_maddr & (ia->ia_msize-1)) != 0) {
+		printf("tribm_isa_probe: SRAM unaligned 0x%04x/%d\n",
+		    ia->ia_maddr, ia->ia_msize);
+		return 0;
+	}
+ 	return 1;
+}
diff --git a/sys/dev/isa/if_trtcm_isa.c b/sys/dev/isa/if_trtcm_isa.c
new file mode 100644
index 00000000000..3fb6063b675
--- /dev/null
+++ b/sys/dev/isa/if_trtcm_isa.c
@@ -0,0 +1,359 @@
+/*	$OpenBSD: if_trtcm_isa.c,v 1.1 1999/12/27 21:51:35 fgsch Exp $	*/
+/*	$NetBSD: if_trtcm_isa.c,v 1.3 1999/04/30 15:29:24 bad Exp $	*/
+
+#undef TRTCMISADEBUG
+/*
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Onno van der Linden.
+ *
+ * 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/device.h>
+#include <sys/malloc.h>
+
+#include <net/if.h>
+#include <net/if_media.h>
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+
+#include <machine/bus.h>
+
+#include <dev/isa/isavar.h>
+#include <dev/isa/elink.h>
+
+#include <dev/ic/tropicreg.h>
+#include <dev/ic/tropicvar.h>
+
+#include <dev/ic/elink3reg.h>
+
+u_int16_t	tcmreadeeprom __P((bus_space_tag_t, bus_space_handle_t, int));
+#ifdef TRTCMISADEBUG
+void	tcmdumpeeprom __P((bus_space_tag_t, bus_space_handle_t));
+#endif
+
+int	trtcm_isa_probe __P((struct device *, void *, void *));
+
+int	trtcm_isa_mediachange __P((struct tr_softc *));
+void	trtcm_isa_mediastatus __P((struct tr_softc *, struct ifmediareq *));
+
+/*
+ * TODO:
+ * 
+ * if_media handling in the 3com case
+ * mediachange() and mediastatus() function
+ * certain newer cards can set their speed on the fly via
+ * DIR_SET_DEFAULT_RING_SPEED or set the speed in the eeprom ??
+ */
+
+static	void tcmaddcard __P((int, int, int, int, u_int, int, int));
+
+/*
+ * This keeps track of which ISAs have been through a 3com probe sequence.
+ * A simple static variable isn't enough, since it's conceivable that
+ * a system might have more than one ISA bus.
+ *
+ * The "tcm_bus" member is the unit number of the parent ISA bus, e.g. "0"
+ * for "isa0".
+ */
+struct tcm_isa_done_probe {
+	LIST_ENTRY(tcm_isa_done_probe)	tcm_link;
+	int				tcm_bus;
+};
+static LIST_HEAD(, tcm_isa_done_probe) tcm_isa_all_probes;
+static int tcm_isa_probes_initialized;
+
+#define MAXTCMCARDS	20	/* if you have more than 20, you lose */
+
+static struct tcmcard {
+	int	bus;
+	int	iobase;
+	int	irq;
+	int	maddr;
+	u_int	msize;
+	long	model;
+	char	available;
+	char	pnpmode;
+} tcmcards[MAXTCMCARDS];
+
+static int ntcmcards = 0;
+
+static void
+tcmaddcard(bus, iobase, irq, maddr, msize, model, pnpmode)
+	int bus, iobase, irq, maddr;
+	u_int msize;
+	int model, pnpmode;
+{
+
+	if (ntcmcards >= MAXTCMCARDS)
+		return;
+	tcmcards[ntcmcards].bus = bus;
+	tcmcards[ntcmcards].iobase = iobase;
+	tcmcards[ntcmcards].irq = irq;
+	tcmcards[ntcmcards].maddr = maddr;
+	tcmcards[ntcmcards].msize = msize;
+	tcmcards[ntcmcards].model = model;
+	tcmcards[ntcmcards].available = 1;
+	tcmcards[ntcmcards].pnpmode = pnpmode;
+	ntcmcards++;
+}
+
+/*
+ * We get eeprom data from the id_port given an offset into the
+ * eeprom.  Basically; after the ID_sequence is sent to all of
+ * the cards; they enter the ID_CMD state where they will accept
+ * command requests. 0x80-0xbf loads the eeprom data.  We then
+ * read the port 16 times and with every read; the cards check
+ * for contention (ie: if one card writes a 0 bit and another
+ * writes a 1 bit then the host sees a 0. At the end of the cycle;
+ * each card compares the data on the bus; if there is a difference
+ * then that card goes into ID_WAIT state again). In the meantime;
+ * one bit of data is returned in the AX register which is conveniently
+ * returned to us by bus_space_read_1().  Hence; we read 16 times getting one
+ * bit of data with each read.
+ *
+ * NOTE: the caller must provide an i/o handle for ELINK_ID_PORT!
+ */
+u_int16_t
+tcmreadeeprom(iot, ioh, offset)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
+	int offset;
+{
+	u_int16_t data = 0;
+	int i;
+
+	bus_space_write_1(iot, ioh, 0, 0x80 + offset);
+	delay(1000);
+	for (i = 0; i < 16; i++)
+		data = (data << 1) | (bus_space_read_2(iot, ioh, 0) & 1);
+	return (data);
+}
+
+#ifdef TRTCMISADEBUG
+/*
+ * Dump the contents of the EEPROM to the console.
+ */
+void
+tcmdumpeeprom(iot, ioh)
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
+{
+	unsigned int off, val;
+
+	printf("EEPROM contents:");
+	for (off=0; off < 32; off++) {
+		val = tcmreadeeprom(iot, ioh, off);
+		if ((off % 8) == 0)
+			printf("\n");
+		printf("%04x ", val);
+	}
+	printf("\n");
+}
+#endif
+
+int
+trtcm_isa_mediachange(sc)
+	struct tr_softc *sc;
+{
+	return EINVAL;
+}
+
+void
+trtcm_isa_mediastatus(sc, ifmr)
+	struct tr_softc *sc;
+	struct ifmediareq *ifmr;
+{
+	struct ifmedia	*ifm = &sc->sc_media;
+
+	ifmr->ifm_active = ifm->ifm_cur->ifm_media;
+}
+
+/* XXX hard coded constants in readeeprom elink_idseq */
+
+int
+trtcm_isa_probe(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct isa_attach_args	*ia = aux;
+	int	bus = parent->dv_unit;
+	bus_space_tag_t iot = ia->ia_iot;
+	bus_space_handle_t ioh;
+	u_int	msize;
+	int slot, iobase, irq, i, maddr, rsrccfg, pnpmode;
+	u_int16_t vendor, model;
+	struct tcm_isa_done_probe *tcm;
+	static int irqs[] = { 7, 15, 6, 11, 3, 10, 9, 5 };
+
+	if (tcm_isa_probes_initialized == 0) {
+		LIST_INIT(&tcm_isa_all_probes);
+		tcm_isa_probes_initialized = 1;
+	}
+
+	/*
+	 * Probe this bus if we haven't done so already.
+	 */
+	for (tcm = tcm_isa_all_probes.lh_first; tcm != NULL;
+	    tcm = tcm->tcm_link.le_next)
+		if (tcm->tcm_bus == bus)
+			goto bus_probed;
+
+	/*
+	 * Mark this bus so we don't probe it again.
+	 */
+	tcm = (struct tcm_isa_done_probe *)
+	    malloc(sizeof(struct tcm_isa_done_probe), M_DEVBUF, M_NOWAIT);
+	if (tcm == NULL) {
+		printf("trtcm_isa_probe: can't allocate state storage");
+		return 0;
+	}
+
+	tcm->tcm_bus = bus;
+	LIST_INSERT_HEAD(&tcm_isa_all_probes, tcm, tcm_link);
+
+	/*
+	 * Map the TokenLink ID port for the probe sequence.
+	 */
+	if (bus_space_map(iot, ELINK_ID_PORT, 1, 0, &ioh)) {
+		printf("trtcm_isa_probe: can't map TokenLink ID port\n");
+		return 0;
+	}
+
+	for (slot = 0; slot < MAXTCMCARDS; slot++) {
+		pnpmode = 0;
+		elink_reset(iot, ioh, bus);
+		elink_idseq(iot, ioh, TLINK_619_POLY);
+
+		/* Untag all the adapters so they will talk to us. */
+		if (slot == 0)
+			bus_space_write_1(iot, ioh, 0, TAG_ADAPTER + 0);
+
+		vendor = htons(tcmreadeeprom(iot, ioh, EEPROM_MFG_ID));
+		if (vendor != MFG_ID)
+			continue;
+
+		model = htons(tcmreadeeprom(iot, ioh, EEPROM_PROD_ID));
+		if (((model & 0xfff0) != 0x6190) &&
+		    ((model & 0xfff0) != 0x3190)) { /* XXX hardcoded */
+#if 0
+			printf("trtcm: unknown model 0x%04x\n", model);
+#endif
+			continue;
+		}
+#ifdef TRTCMISADEBUG
+		tcmdumpeeprom(iot, ioh);
+
+		printf("speed: %d\n", (tcmreadeeprom(iot,ioh,8) & 2) ? 4 : 16);
+#endif
+
+		rsrccfg = iobase = tcmreadeeprom(iot, ioh, EEPROM_RESOURCE_CFG);
+		if (iobase & 0x20)
+			iobase = tcmreadeeprom(iot, ioh, EEPROM_ADDR_CFG) & 1 ?
+			    0xa20 : 0xa24;
+		else
+			iobase = (iobase & 0x1f) * 0x10 + 0x200;
+
+		maddr = ((tcmreadeeprom(iot, ioh, EEPROM_OEM_ADDR0) & 0xfc00)
+		    << 3) + 0x80000;
+		msize = 65536 >> ((tcmreadeeprom(iot, ioh, 8) & 0x0c) >> 2);
+
+		irq = tcmreadeeprom(iot, ioh, EEPROM_ADDR_CFG) & 0x180;
+		irq |= (tcmreadeeprom(iot, ioh, EEPROM_RESOURCE_CFG) & 0x40);
+		irq = irqs[irq >> 6];
+
+		/* Tag card so it will not respond to contention again. */
+		bus_space_write_1(iot, ioh, 0, TAG_ADAPTER + 1);
+
+		/*
+		 * Don't attach a 3c319 in PnP mode.
+		 *
+		 * XXX Testing for the 13th bit in iobase being 0 might not
+		 * be the right thing to do, but the EEPROM of the 3C319 is
+		 * undocumented according to 3COM and this is one of the
+		 * three bits that changed when I put the card in PnP mode. -chb
+		 */
+		if (((model & 0xffff0) == 0x3190) &&
+		    ((rsrccfg & 0x1000) == 0)) {
+			printf("3COM 3C319 TokenLink Velocity in PnP mode\n");
+			pnpmode = 1;
+		}
+		else {
+			/*
+			 * XXX: this should probably not be done here
+			 * because it enables the drq/irq lines from
+			 * the board. Perhaps it should be done after
+			 * we have checked for irq/drq collisions?
+			 */
+			bus_space_write_1(iot, ioh, 0,
+			    ACTIVATE_ADAPTER_TO_CONFIG);
+		}
+		tcmaddcard(bus, iobase, irq, maddr, msize, model, pnpmode);
+	}
+	bus_space_unmap(iot, ioh, 1);
+
+bus_probed:
+
+	for (i = 0; i < ntcmcards; i++) {
+		if (tcmcards[i].bus != bus)
+			continue;
+		if (tcmcards[i].available == 0)
+			continue;
+		if (ia->ia_iobase != IOBASEUNK &&
+		    ia->ia_iobase != tcmcards[i].iobase)
+			continue;
+		if (ia->ia_irq != IRQUNK &&
+		    ia->ia_irq != tcmcards[i].irq)
+			continue;
+		goto good;
+	}
+	return 0;
+
+good:
+	tcmcards[i].available = 0;
+	if (tcmcards[i].pnpmode)
+		return -1;	/* XXX Don't actually probe this card. */
+	ia->ia_iobase = tcmcards[i].iobase;
+	ia->ia_irq = tcmcards[i].irq;
+	/* XXX probably right, but ...... */
+	if (ia->ia_iobase == 0xa20 || ia->ia_iobase == 0x0a24)
+		ia->ia_iosize = 4;
+	else
+		ia->ia_iosize = 16;
+	ia->ia_maddr = tcmcards[i].maddr;
+	ia->ia_msize = tcmcards[i].msize;
+	ia->ia_aux = (void *) tcmcards[i].model;
+	return 1;
+}