94720e3009
i82586-based controller, similarily to e.g. ai(4), el(4) or ix(4). The driver was modelled after the ai(4) driver. Due to lack of better documentation, Linux 3c523 driver was used to find out 3c523-specific quirks. Of course, the necessary work was greatly reduced by our decend generic ic/i82586 code :) Finally, NetBSD supports an ethernet card on IBM PS/2!
462 lines
13 KiB
C
462 lines
13 KiB
C
/* $NetBSD: if_elmc_mca.c,v 1.1 2001/03/16 23:03:15 jdolecek Exp $ */
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/*-
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* Copyright (c) 2001 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 and Jaromir Dolecek.
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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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/*
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* 3Com 3c523 EtherLink/MC Ethernet card driver (uses i82586 Ethernet chip).
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*
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* The 3c523-specific hooks were derived from Linux driver (file
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* drivers/net/3c523.[ch]).
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*
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* This driver uses generic i82586 stuff. See also ai(4), ef(4), ix(4).
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*
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* Known issues:
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* o seems like the initialization is not bullet proof; initially, the
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* card I had responded with "incorrect termination" warning and started
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* to work correctly after I booted the PS/2 with Slackware 3.3 bootdisk
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*/
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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 <sys/syslog.h>
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#include <sys/reboot.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_efreg.h>
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#include <dev/isa/elink.h>
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#include <dev/mca/mcadevs.h>
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#include <dev/mca/mcavar.h>
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#include <dev/mca/3c523reg.h>
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struct elmc_mca_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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void *sc_ih; /* interrupt handle */
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};
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int elmc_mca_match __P((struct device *, struct cfdata *, void *));
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void elmc_mca_attach __P((struct device *, struct device *, void *));
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static void elmc_mca_copyin __P((struct ie_softc *, void *, int, size_t));
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static void elmc_mca_copyout __P((struct ie_softc *, const void *, int, size_t));
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static u_int16_t elmc_mca_read_16 __P((struct ie_softc *, int));
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static void elmc_mca_write_16 __P((struct ie_softc *, int, u_int16_t));
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static void elmc_mca_write_24 __P((struct ie_softc *, int, int));
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static void elmc_mca_attn __P((struct ie_softc *, int));
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static void elmc_mca_hwreset __P((struct ie_softc *, int));
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static int elmc_mca_intrhook __P((struct ie_softc *, int));
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int
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elmc_mca_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct mca_attach_args *ma = aux;
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switch (ma->ma_id) {
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case MCA_PRODUCT_3C523:
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return 1;
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}
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return 0;
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}
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void
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elmc_mca_attach(struct device *parent, struct device *self, void *aux)
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{
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struct elmc_mca_softc *asc = (void *) self;
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struct ie_softc *sc = &asc->sc_ie;
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struct mca_attach_args *ma = aux;
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int pos2, pos3, i, revision;
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char buf[100];
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int iobase, irq, pbram_addr;
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bus_space_handle_t ioh, memh;
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u_int8_t myaddr[ETHER_ADDR_LEN];
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mca_devinfo(ma->ma_id, buf);
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printf(" slot %d: %s\n", ma->ma_slot + 1, buf);
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pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2);
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pos3 = mca_conf_read(ma->ma_mc, ma->ma_slot, 3);
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/*
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* POS register 2: (adf pos0)
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*
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* 7 6 5 4 3 2 1 0
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* \ \_/ \_/ \__ enable: 0=adapter disabled, 1=adapter enabled
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* \ \ \____ I/O Address Range: 00=300-307, 01=1300-1307,
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* \ \ 10=2300-2307, 11=3300-3307
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* \ \______ Packet Buffer RAM Address Range:
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* \ 00=0x0c0000-0x0c5fff 01=0x0c8000-0x0cdfff
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* \ 10=0x0d0000-0x0d5fff 11=0x0d8000-0x0ddfff
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* \______ Transceiver Type: 0=onboard(BNC) 1=ext(DIX)
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*
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* POS register 3: (adf pos1)
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*
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* 7 6 5 4 3 2 1 0
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* \____/
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* \__ Interrupt level: 0100=3, 0010=7, 1000=9, 0001=12
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*/
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iobase = ELMC_IOADDR_BASE + (0x1000 * ((pos2 & 0x6) >> 1));
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/* get irq */
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switch (pos3 & 0x1f) {
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case 4: irq = 3; break;
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case 2: irq = 7; break;
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case 8: irq = 9; break;
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case 1: irq = 12; break;
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}
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pbram_addr = ELMC_MADDR_BASE + (((pos2 & 24) >> 3) * 0x8000);
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/* map the pio registers */
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if (bus_space_map(ma->ma_iot, iobase, ELMC_IOADDR_SIZE, 0, &ioh)) {
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printf("%s: unable to map i/o space\n", sc->sc_dev.dv_xname);
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return;
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}
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/*
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* 3c523 has a 24K memory. The first 16K is the shared memory, while
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* the last 8K is for the EtherStart BIOS ROM, which we don't care
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* about. Just use the first 16K.
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*/
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if (bus_space_map(ma->ma_memt, pbram_addr, ELMC_MADDR_SIZE, 0, &memh)) {
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printf("%s: unable to map memory space\n", sc->sc_dev.dv_xname);
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if (pbram_addr == 0xc0000) {
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printf("%s: memory space 0xc0000 may conflict with vga\n",
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sc->sc_dev.dv_xname);
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}
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bus_space_unmap(ma->ma_iot, ioh, ELMC_IOADDR_SIZE);
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return;
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}
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asc->sc_regt = ma->ma_iot;
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asc->sc_regh = ioh;
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sc->hwinit = NULL;
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sc->intrhook = elmc_mca_intrhook;
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sc->hwreset = elmc_mca_hwreset;
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sc->chan_attn = elmc_mca_attn;
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sc->ie_bus_barrier = NULL;
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sc->memcopyin = elmc_mca_copyin;
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sc->memcopyout = elmc_mca_copyout;
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sc->ie_bus_read16 = elmc_mca_read_16;
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sc->ie_bus_write16 = elmc_mca_write_16;
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sc->ie_bus_write24 = elmc_mca_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 = ma->ma_memt;
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sc->bh = memh;
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/* Map i/o space. */
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sc->sc_msize = ELMC_MADDR_SIZE;
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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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/* reset the card first */
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elmc_mca_hwreset(sc, CARD_RESET);
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delay(1000000 / ( 1<< 5));
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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), 0);
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/* set up pointers to key structures */
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elmc_mca_write_24(sc, IE_SCP_ISCP((u_long)sc->scp), (u_long) sc->iscp);
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elmc_mca_write_16(sc, IE_ISCP_SCB((u_long)sc->iscp), (u_long) sc->scb);
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elmc_mca_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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printf("%s: can't talk to i82586!\n", sc->sc_dev.dv_xname);
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bus_space_unmap(asc->sc_regt, asc->sc_regh, ELMC_IOADDR_SIZE);
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bus_space_unmap(sc->bt, sc->bh, ELMC_MADDR_SIZE);
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return;
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}
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/* revision is stored in the first 4 bits of the revision register */
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revision = (int) bus_space_read_1(asc->sc_regt, asc->sc_regh,
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ELMC_REVISION) & ELMC_REVISION_MASK;
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/* dump known info */
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printf("%s: rev %d, i/o %#04x-%#04x, mem %#06x-%#06x, %sternal xcvr\n",
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sc->sc_dev.dv_xname, revision,
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iobase, iobase + ELMC_IOADDR_SIZE - 1,
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pbram_addr, pbram_addr + ELMC_MADDR_SIZE - 1,
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(pos2 & 0x20) ? "ex" : "in");
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/*
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* Hardware ethernet address is stored in the first six bytes
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* of the IO space.
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*/
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for(i=0; i < MIN(6, ETHER_ADDR_LEN); i++)
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myaddr[i] = bus_space_read_1(asc->sc_regt, asc->sc_regh, i);
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printf("%s:", sc->sc_dev.dv_xname);
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i82586_attach((void *)sc, "3C523", myaddr, NULL, 0, 0);
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/* establish interrupt handler */
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asc->sc_ih = mca_intr_establish(ma->ma_mc, irq, IPL_NET, i82586_intr,
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sc);
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if (asc->sc_ih == NULL)
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printf("%s: couldn't establish interrupt handler\n",
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sc->sc_dev.dv_xname);
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else
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printf("%s: interrupting at irq %d\n", sc->sc_dev.dv_xname, irq);
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/*
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* According to docs, we might need to read the interrupt number and
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* write it back to the IRQ select register, since the POST might not
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* configure the IRQ properly.
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*/
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(void) mca_conf_write(ma->ma_mc, ma->ma_slot, 3, pos3 & 0x1f);
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return;
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}
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static void
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elmc_mca_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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elmc_mca_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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elmc_mca_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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elmc_mca_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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elmc_mca_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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/*
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* Channel attention hook.
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*/
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static void
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elmc_mca_attn(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 elmc_mca_softc* asc = (struct elmc_mca_softc *) sc;
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int intr = 0;
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switch (why) {
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case CHIP_PROBE:
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intr = 0;
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break;
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case CARD_RESET:
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intr = ELMC_CTRL_INT;
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break;
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}
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bus_space_write_1(asc->sc_regt, asc->sc_regh, ELMC_CTRL,
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ELMC_CTRL_RST | ELMC_CTRL_BS3 | ELMC_CTRL_CHA | intr);
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delay(16); /* should be > 500 ns */
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bus_space_write_1(asc->sc_regt, asc->sc_regh, ELMC_CTRL,
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ELMC_CTRL_RST | ELMC_CTRL_BS3 | intr);
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}
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/*
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* Do full card hardware reset.
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*/
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static void
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elmc_mca_hwreset(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 elmc_mca_softc* asc = (struct elmc_mca_softc *) sc;
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int intr = 0;
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switch (why) {
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case CHIP_PROBE:
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intr = 0;
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break;
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case CARD_RESET:
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intr = ELMC_CTRL_INT;
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break;
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}
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/* toggle the RST bit low then high */
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bus_space_write_1(asc->sc_regt, asc->sc_regh, ELMC_CTRL,
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ELMC_CTRL_BS3 | ELMC_CTRL_LOOP);
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delay(16); /* should be > 500 ns */
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bus_space_write_1(asc->sc_regt, asc->sc_regh, ELMC_CTRL,
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ELMC_CTRL_BS3 | ELMC_CTRL_LOOP | ELMC_CTRL_RST);
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elmc_mca_attn(sc, why);
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}
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/*
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* Interrupt hook.
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*/
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static int
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elmc_mca_intrhook(sc, why)
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struct ie_softc *sc;
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int why;
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{
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switch (why) {
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case INTR_ACK:
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elmc_mca_attn(sc, CHIP_PROBE);
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break;
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default:
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/* do nothing */
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break;
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}
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return (0);
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}
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struct cfattach elmc_mca_ca = {
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sizeof(struct elmc_mca_softc), elmc_mca_match, elmc_mca_attach
|
|
};
|