Add support for TurboChannel alphas (DEC 3000/300 and 3000/500).

Obtained from: NetBSD
Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>

1 files changed, 170 insertions, 0 deletions

diff --git a/sys/alpha/tc/if_le_dec.c b/sys/alpha/tc/if_le_dec.c
new file mode 100644
index 0000000..6e1206b
--- /dev/null
+++ b/sys/alpha/tc/if_le_dec.c
@@ -0,0 +1,170 @@
+/* $Id$ */
+/*	$NetBSD: if_le_dec.c,v 1.8 1997/07/22 04:32:21 jonathan Exp $	*/
+
+/*-
+ * Copyright (c) 1997 Jonathan Stone. All rights reserved.
+ * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Ralph Campbell and Rick Macklem.
+ *
+ * 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 University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ *
+ *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
+ */
+
+#include "bpfilter.h"
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/mbuf.h>
+#include <sys/syslog.h>
+#include <sys/socket.h>
+#include <sys/device.h>
+
+#include <net/if.h>
+#include <net/netisr.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 <net/if_media.h>
+
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/if_inarp.h>
+#endif
+
+#include <alpha/tc/am7990reg.h>
+#include <alpha/tc/am7990var.h>
+
+#include <alpha/tc/if_levar.h>
+#include <alpha/tc/tcreg.h>
+#include <alpha/tc/tcvar.h>
+#include <alpha/tc/ioasicvar.h>
+#include <machine/clock.h>
+
+
+/* access LANCE registers */
+void le_dec_writereg __P((volatile u_short *regptr, u_short val));
+#define	LERDWR(cntl, src, dst)	{ (dst) = (src); tc_mb(); }
+#define	LEWREG(src, dst)	le_dec_writereg(&(dst), (src))
+
+hide void le_dec_wrcsr __P((struct am7990_softc *, u_int16_t, u_int16_t));
+hide u_int16_t le_dec_rdcsr __P((struct am7990_softc *, u_int16_t));  
+char *ether_sprintf(char *);
+void
+dec_le_common_attach(sc, eap)
+	struct am7990_softc *sc;
+	u_char *eap;
+{
+	int i;
+
+	sc->sc_rdcsr = le_dec_rdcsr;
+	sc->sc_wrcsr = le_dec_wrcsr;
+	sc->sc_hwinit = NULL;
+
+	sc->sc_conf3 = 0;
+	sc->sc_addr = 0;
+	sc->sc_memsize = 65536;
+
+	/*
+	 * Get the ethernet address out of rom
+	 */
+	for (i = 0; i < sizeof(sc->sc_enaddr); i++) {
+		sc->sc_enaddr[i] = *eap;
+		eap += 4;
+	}
+	am7990_config(sc);
+}
+
+hide void
+le_dec_wrcsr(sc, port, val)
+	struct am7990_softc *sc;
+	u_int16_t port, val;
+{
+	struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
+	LEWREG(port, ler1->ler1_rap);
+	LERDWR(port, val, ler1->ler1_rdp);
+}
+
+hide u_int16_t
+le_dec_rdcsr(sc, port)
+	struct am7990_softc *sc;
+	u_int16_t port;
+{
+	struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
+	u_int16_t val;
+	LEWREG(port, ler1->ler1_rap);
+	LERDWR(0, ler1->ler1_rdp, val);
+	return (val);
+}
+
+/*
+ * Write a lance register port, reading it back to ensure success. This seems
+ * to be necessary during initialization, since the chip appears to be a bit
+ * pokey sometimes.
+ */
+void
+le_dec_writereg(regptr, val)
+	register volatile u_short *regptr;
+	register u_short val;
+{
+	register int i = 0;
+	while (*regptr != val) {
+		*regptr = val;
+		tc_mb();
+		if (++i > 10000) {
+			printf("le: Reg did not settle (to x%x): x%x\n", val,
+			    *regptr);
+			return;
+		}
+		DELAY(100);
+	}
+}
+
+/*
+ * Routines for accessing the transmit and receive buffers are provided
+ * by am7990.c, because of the LE_NEED_BUF_* macros defined above.
+ * Unfortunately, CPU addressing of these buffers is done in one of
+ * 3 ways:
+ * - contiguous (for the 3max and turbochannel option card)
+ * - gap2, which means shorts (2 bytes) interspersed with short (2 byte)
+ *   spaces (for the pmax, vax 3400, and ioasic LANCE descriptors)
+ * - gap16, which means 16bytes interspersed with 16byte spaces
+ *   for buffers which must begin on a 32byte boundary (for 3min, maxine,
+ *   and alpha)
+ * The buffer offset is the logical byte offset, assuming contiguous storage.
+ */