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.

1 files changed, 174 insertions, 0 deletions

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;
+}