f0002ba642
for the i82596 PORT access interface, from the documentation for that chip. These help clarify writes to the SYSBUS part of the SCP, and PORT usage by i82596-aware drivers.
500 lines
13 KiB
C
500 lines
13 KiB
C
/* $NetBSD: if_ai.c,v 1.13 2001/11/26 23:31:00 fredette Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Rafal K. Boni.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: if_ai.c,v 1.13 2001/11/26 23:31:00 fredette Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_media.h>
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#include <net/if_ether.h>
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#include <machine/cpu.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#include <dev/ic/i82586reg.h>
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#include <dev/ic/i82586var.h>
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#include <dev/isa/if_aireg.h>
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#ifdef AI_DEBUG
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#define DPRINTF(x) printf x
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#else
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#define DPRINTF(x)
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#endif
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struct ai_softc {
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struct ie_softc sc_ie;
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bus_space_tag_t sc_regt; /* space tag for registers */
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bus_space_handle_t sc_regh; /* space handle for registers */
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u_int8_t card_rev;
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u_int8_t card_type;
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void *sc_ih; /* interrupt handle */
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};
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const char *ai_names[] = {
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"StarLAN 10",
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"EN100",
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"StarLAN Fiber",
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};
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/* Functions required by the i82586 MI driver */
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static void ai_reset __P((struct ie_softc *, int));
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static void ai_atten __P((struct ie_softc *, int));
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static void ai_copyin __P((struct ie_softc *, void *, int, size_t));
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static void ai_copyout __P((struct ie_softc *, const void *, int, size_t));
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static u_int16_t ai_read_16 __P((struct ie_softc *, int));
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static void ai_write_16 __P((struct ie_softc *, int, u_int16_t));
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static void ai_write_24 __P((struct ie_softc *, int, int));
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/* Local support functions */
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static int check_ie_present __P((struct ie_softc*, bus_space_tag_t,
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bus_space_handle_t, bus_size_t));
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static int ai_find_mem_size __P((struct ai_softc*, bus_space_tag_t,
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bus_size_t));
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int ai_match __P((struct device *, struct cfdata *, void *));
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void ai_attach __P((struct device *, struct device *, void *));
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/*
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* AT&T StarLan support routines
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*/
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static void
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ai_reset(sc, why)
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struct ie_softc *sc;
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int why;
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{
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struct ai_softc* asc = (struct ai_softc *) sc;
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switch (why) {
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case CHIP_PROBE:
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/* reset to chip to see if it responds */
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bus_space_write_1(asc->sc_regt, asc->sc_regh, AI_RESET, 0);
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DELAY(100);
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break;
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case CARD_RESET:
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/*
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* this takes around 10sec, and we can get
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* by quite well w/out it...
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*/
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break;
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}
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}
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static void
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ai_atten(sc, why)
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struct ie_softc *sc;
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int why;
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{
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struct ai_softc* asc = (struct ai_softc *) sc;
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bus_space_write_1(asc->sc_regt, asc->sc_regh, AI_ATTN, 0);
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}
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static void
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ai_copyin (sc, dst, offset, size)
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struct ie_softc *sc;
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void *dst;
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int offset;
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size_t size;
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{
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int dribble;
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u_int8_t* bptr = dst;
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bus_space_barrier(sc->bt, sc->bh, offset, size,
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BUS_SPACE_BARRIER_READ);
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if (offset % 2) {
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*bptr = bus_space_read_1(sc->bt, sc->bh, offset);
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offset++; bptr++; size--;
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}
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dribble = size % 2;
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bus_space_read_region_2(sc->bt, sc->bh, offset, (u_int16_t *) bptr,
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size >> 1);
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if (dribble) {
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bptr += size - 1;
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offset += size - 1;
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*bptr = bus_space_read_1(sc->bt, sc->bh, offset);
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}
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}
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static void
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ai_copyout (sc, src, offset, size)
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struct ie_softc *sc;
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const void *src;
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int offset;
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size_t size;
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{
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int dribble;
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int osize = size;
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int ooffset = offset;
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const u_int8_t* bptr = src;
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if (offset % 2) {
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bus_space_write_1(sc->bt, sc->bh, offset, *bptr);
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offset++; bptr++; size--;
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}
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dribble = size % 2;
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bus_space_write_region_2(sc->bt, sc->bh, offset, (u_int16_t *)bptr,
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size >> 1);
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if (dribble) {
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bptr += size - 1;
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offset += size - 1;
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bus_space_write_1(sc->bt, sc->bh, offset, *bptr);
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}
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bus_space_barrier(sc->bt, sc->bh, ooffset, osize,
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BUS_SPACE_BARRIER_WRITE);
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}
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static u_int16_t
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ai_read_16 (sc, offset)
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struct ie_softc *sc;
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int offset;
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{
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bus_space_barrier(sc->bt, sc->bh, offset, 2, BUS_SPACE_BARRIER_READ);
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return bus_space_read_2(sc->bt, sc->bh, offset);
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}
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static void
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ai_write_16 (sc, offset, value)
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struct ie_softc *sc;
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int offset;
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u_int16_t value;
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{
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bus_space_write_2(sc->bt, sc->bh, offset, value);
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bus_space_barrier(sc->bt, sc->bh, offset, 2, BUS_SPACE_BARRIER_WRITE);
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}
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static void
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ai_write_24 (sc, offset, addr)
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struct ie_softc *sc;
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int offset, addr;
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{
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bus_space_write_4(sc->bt, sc->bh, offset, addr +
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(u_long) sc->sc_maddr - (u_long) sc->sc_iobase);
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bus_space_barrier(sc->bt, sc->bh, offset, 4, BUS_SPACE_BARRIER_WRITE);
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}
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int
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ai_match(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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int rv = 0;
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u_int8_t val, type;
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bus_size_t memsize;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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struct isa_attach_args * const ia = aux;
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struct ai_softc asc;
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/* Punt if wildcarded port, IRQ or memory address */
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if (ia->ia_irq == ISACF_IRQ_DEFAULT ||
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ia->ia_maddr == ISACF_IOMEM_DEFAULT ||
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ia->ia_iobase == ISACF_PORT_DEFAULT) {
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DPRINTF((
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"ai_match: wildcarded IRQ, IOAddr, or memAddr, skipping\n"));
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return (0);
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}
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iot = ia->ia_iot;
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/*
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* This probe is horribly bad, but I have no info on this card other
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* than the former driver, and it was just as bad!
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*/
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if (bus_space_map(iot, ia->ia_iobase,
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AI_IOSIZE, 0, &ioh) != 0) {
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DPRINTF(("ai_match: cannot map %d IO ports @ 0x%x\n",
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AI_IOSIZE, ia->ia_iobase));
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return (0);
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}
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val = bus_space_read_1(iot, ioh, AI_REVISION);
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type = SL_BOARD(val);
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if (type != SL10_BOARD && type != EN100_BOARD &&
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type != SLFIBER_BOARD) {
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DPRINTF(("ai_match: unknown board code 0x%02x @ 0x%x\n",
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type, ia->ia_iobase));
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goto out;
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}
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/*
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* Fill in just about enough of our local `ai_softc' for
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* ai_find_mem_size() to do its job.
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*/
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memset(&asc, 0, sizeof asc);
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asc.sc_regt = iot;
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asc.sc_regh = ioh;
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if ((memsize = ai_find_mem_size(&asc,ia->ia_memt,ia->ia_maddr)) == 0) {
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DPRINTF(("ai_match: cannot size memory of board @ 0x%x\n",
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ia->ia_iobase));
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goto out;
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}
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if (!ia->ia_msize)
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ia->ia_msize = memsize;
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else if (ia->ia_msize != memsize) {
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DPRINTF((
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"ai_match: memsize of board @ 0x%x doesn't match config\n",
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ia->ia_iobase));
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goto out;
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}
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rv = 1;
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ia->ia_msize = memsize;
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ia->ia_iosize = AI_IOSIZE;
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DPRINTF(("ai_match: found board @ 0x%x\n", ia->ia_iobase));
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out:
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bus_space_unmap(iot, ioh, AI_IOSIZE);
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return rv;
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}
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void
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ai_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct ai_softc *asc = (void *)self;
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struct ie_softc *sc = &asc->sc_ie;
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struct isa_attach_args *ia = aux;
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u_int8_t val = 0;
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bus_space_handle_t ioh, memh;
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u_int8_t ethaddr[ETHER_ADDR_LEN];
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char name[80];
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if (bus_space_map(ia->ia_iot, ia->ia_iobase,
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ia->ia_iosize, 0, &ioh) != 0) {
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DPRINTF(("\n%s: can't map i/o space 0x%x-0x%x\n",
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sc->sc_dev.dv_xname,
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ia->ia_iobase, ia->ia_iobase + ia->ia_iosize - 1));
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return;
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}
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if (bus_space_map(ia->ia_memt, ia->ia_maddr,
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ia->ia_msize, 0, &memh) != 0) {
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DPRINTF(("\n%s: can't map iomem space 0x%x-0x%x\n",
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sc->sc_dev.dv_xname,
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ia->ia_maddr, ia->ia_maddr + ia->ia_msize - 1));
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bus_space_unmap(ia->ia_iot, ioh, ia->ia_iosize);
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return;
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}
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asc->sc_regt = ia->ia_iot;
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asc->sc_regh = ioh;
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sc->hwinit = NULL;
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sc->intrhook = NULL;
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sc->hwreset = ai_reset;
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sc->chan_attn = ai_atten;
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sc->ie_bus_barrier = NULL;
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sc->memcopyin = ai_copyin;
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sc->memcopyout = ai_copyout;
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sc->ie_bus_read16 = ai_read_16;
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sc->ie_bus_write16 = ai_write_16;
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sc->ie_bus_write24 = ai_write_24;
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sc->do_xmitnopchain = 0;
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sc->sc_mediachange = NULL;
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sc->sc_mediastatus = NULL;
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sc->bt = ia->ia_memt;
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sc->bh = memh;
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/* Map i/o space. */
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sc->sc_msize = ia->ia_msize;
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sc->sc_maddr = (void *)memh;
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sc->sc_iobase = (char *)sc->sc_maddr + sc->sc_msize - (1 << 24);
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/* set up pointers to important on-card control structures */
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sc->iscp = 0;
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sc->scb = IE_ISCP_SZ;
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sc->scp = sc->sc_msize + IE_SCP_ADDR - (1 << 24);
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sc->buf_area = sc->scb + IE_SCB_SZ;
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sc->buf_area_sz = sc->sc_msize - IE_ISCP_SZ - IE_SCB_SZ - IE_SCP_SZ;
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/* zero card memory */
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bus_space_set_region_1(sc->bt, sc->bh, 0, 0, sc->sc_msize);
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/* set card to 16-bit bus mode */
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bus_space_write_1(sc->bt, sc->bh, IE_SCP_BUS_USE((u_long)sc->scp),
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IE_SYSBUS_16BIT);
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/* set up pointers to key structures */
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ai_write_24(sc, IE_SCP_ISCP((u_long)sc->scp), (u_long) sc->iscp);
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ai_write_16(sc, IE_ISCP_SCB((u_long)sc->iscp), (u_long) sc->scb);
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ai_write_24(sc, IE_ISCP_BASE((u_long)sc->iscp), (u_long) sc->iscp);
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/* flush setup of pointers, check if chip answers */
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bus_space_barrier(sc->bt, sc->bh, 0, sc->sc_msize,
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BUS_SPACE_BARRIER_WRITE);
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if (!i82586_proberam(sc)) {
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DPRINTF(("\n%s: can't talk to i82586!\n",
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sc->sc_dev.dv_xname));
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bus_space_unmap(ia->ia_iot, ioh, ia->ia_iosize);
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bus_space_unmap(ia->ia_memt, memh, ia->ia_msize);
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return;
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}
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val = bus_space_read_1(asc->sc_regt, asc->sc_regh, AI_REVISION);
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asc->card_rev = SL_REV(val);
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asc->card_type = SL_BOARD(val) - 1;
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sprintf(name, "%s, rev. %d",
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ai_names[asc->card_type], asc->card_rev);
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i82586_attach(sc, name, ethaddr, NULL, 0, 0);
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asc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
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IPL_NET, i82586_intr, sc);
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if (asc->sc_ih == NULL) {
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DPRINTF(("\n%s: can't establish interrupt\n",
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sc->sc_dev.dv_xname));
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}
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}
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/*
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* Divine the memory size of this board.
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* Better hope there's nothing important hiding just below the card...
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*/
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static int
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ai_find_mem_size(asc, memt, maddr)
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struct ai_softc* asc;
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bus_space_tag_t memt;
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bus_size_t maddr;
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{
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int size;
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bus_space_handle_t memh;
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struct ie_softc* sc = &asc->sc_ie;
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for (size = 65536; size >= 16384; size -= 16384) {
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if (bus_space_map(memt, maddr, size, 0, &memh) == 0) {
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size = check_ie_present(sc, memt, maddr, size);
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bus_space_unmap(memt, memh, size);
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if (size != 0)
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return size;
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}
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}
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return (0);
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}
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/*
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* Check to see if there's an 82586 out there.
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*/
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static int
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check_ie_present(sc, memt, memh, size)
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struct ie_softc* sc;
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bus_space_tag_t memt;
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bus_space_handle_t memh;
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bus_size_t size;
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{
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sc->hwreset = ai_reset;
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sc->chan_attn = ai_atten;
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sc->ie_bus_read16 = ai_read_16;
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sc->ie_bus_write16 = ai_write_16;
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sc->bt = memt;
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sc->bh = memh;
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sc->sc_iobase = (char *)memh + size - (1 << 24);
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sc->scp = size + IE_SCP_ADDR - (1 << 24);
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bus_space_set_region_1(memt, memh, (u_long) sc->scp, 0, IE_SCP_SZ);
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sc->iscp = 0;
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bus_space_set_region_1(memt, memh, (u_long) sc->iscp, 0, IE_ISCP_SZ);
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sc->scb = IE_ISCP_SZ;
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bus_space_set_region_1(memt, memh, sc->scb, 0, IE_SCB_SZ);
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/* set card to 16-bit bus mode */
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bus_space_write_1(sc->bt, sc->bh, IE_SCP_BUS_USE((u_long)sc->scp),
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|
IE_SYSBUS_16BIT);
|
|
|
|
/* set up pointers to key structures */
|
|
ai_write_24(sc, IE_SCP_ISCP((u_long)sc->scp), (u_long) sc->iscp);
|
|
ai_write_16(sc, IE_ISCP_SCB((u_long)sc->iscp), (u_long) sc->scb);
|
|
ai_write_24(sc, IE_ISCP_BASE((u_long)sc->iscp), (u_long) sc->iscp);
|
|
|
|
/* flush setup of pointers, check if chip answers */
|
|
bus_space_barrier(sc->bt, sc->bh, 0, sc->sc_msize,
|
|
BUS_SPACE_BARRIER_WRITE);
|
|
|
|
if (!i82586_proberam(sc))
|
|
return (0);
|
|
|
|
return (size);
|
|
}
|
|
|
|
struct cfattach ai_ca = {
|
|
sizeof(struct ai_softc), ai_match, ai_attach
|
|
};
|