/*      $NetBSD: if_lc_isa.c,v 1.35 2016/07/11 11:31:50 msaitoh Exp $ */

/*-
 * Copyright (c) 1994, 1995, 1997 Matt Thomas <matt@3am-software.com>
 * All rights reserved.
 *
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/*
 * DEC EtherWORKS 3 Ethernet Controllers
 *
 * Written by Matt Thomas
 *
 *   This driver supports the LEMAC (DE203, DE204, and DE205) cards.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_lc_isa.c,v 1.35 2016/07/11 11:31:50 msaitoh Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <sys/select.h>
#include <sys/device.h>
#include <sys/queue.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>

#include <sys/cpu.h>
#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/ic/lemacreg.h>
#include <dev/ic/lemacvar.h>

#include <dev/isa/isavar.h>

extern struct cfdriver lc_cd;

static int lemac_isa_find(lemac_softc_t *, const char *,
    struct isa_attach_args *, int);
static int lemac_isa_probe(device_t, cfdata_t, void *);
static void lemac_isa_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(lc_isa, sizeof(lemac_softc_t),
    lemac_isa_probe, lemac_isa_attach, NULL, NULL);

static int
lemac_isa_find(lemac_softc_t *sc, const char *xname,
    struct isa_attach_args *ia, int attach)
{
        bus_addr_t maddr;
        bus_size_t msiz;
        int rv = 0, irq;

        if (ia->ia_nio < 1)
                return (0);
        if (ia->ia_niomem < 1)
                return (0);
        if (ia->ia_nirq < 1)
                return (0);

        if (ISA_DIRECT_CONFIG(ia))
                return (0);

        /*
         * Disallow wildcarded i/o addresses.
         */
        if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
                return 0;

        /*
         * Make sure this is a valid LEMAC address.
         */
        if (ia->ia_io[0].ir_addr & (LEMAC_IOSIZE - 1))
                return 0;

        sc->sc_iot = ia->ia_iot;

        if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, LEMAC_IOSIZE, 0,
            &sc->sc_ioh)) {
                if (attach)
                        printf(": can't map i/o space\n");
                return 0;
        }

        /*
         * Read the Ethernet address from the EEPROM.
         * It must start with one of the DEC OUIs and pass the
         * DEC ethernet checksum test.
         */
        if (lemac_port_check(sc->sc_iot, sc->sc_ioh) == 0)
                goto outio;

        /*
         * Get information about memory space and attempt to map it.
         */
        lemac_info_get(sc->sc_iot, sc->sc_ioh, &maddr, &msiz, &irq);

        if (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM &&
            ia->ia_iomem[0].ir_addr != maddr)
                goto outio;

        if (attach) {
                if (msiz == 0) {
                        printf(": memory configuration is invalid\n");
                        goto outio;
                }

                sc->sc_memt = ia->ia_memt;
                if (bus_space_map(ia->ia_memt, maddr, msiz, 0, &sc->sc_memh)) {
                        printf(": can't map mem space\n");
                        goto outio;
                }
        }

        /*
         * Double-check IRQ configuration.
         */
        if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ &&
            ia->ia_irq[0].ir_irq != irq)
                printf("%s: overriding IRQ %d to %d\n", xname,
                       ia->ia_irq[0].ir_irq, irq);

        if (attach) {
                sc->sc_ats = shutdownhook_establish(lemac_shutdown, sc);
                if (sc->sc_ats == NULL) {
                        aprint_normal("\n");
                        aprint_error(
                                "%s: warning: can't establish shutdown hook\n",
                                xname);
                }

                lemac_ifattach(sc);

                sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE,
                    IPL_NET, lemac_intr, sc);
        }

        /*
         * I guess we've found one.
         */
        rv = 1;

        ia->ia_nio = 1;
        ia->ia_io[0].ir_size = LEMAC_IOSIZE;

        ia->ia_niomem = 1;
        ia->ia_iomem[0].ir_addr = maddr;
        ia->ia_iomem[0].ir_size = msiz;

        ia->ia_nirq = 1;
        ia->ia_irq[0].ir_irq = irq;

        ia->ia_ndrq = 0;

outio:
        if (rv == 0 || !attach)
                bus_space_unmap(sc->sc_iot, sc->sc_ioh, LEMAC_IOSIZE);
        return rv;
}

static int
lemac_isa_probe(device_t parent, cfdata_t match, void *aux)
{
        struct isa_attach_args *ia = aux;
        cfdata_t cf = match;
        lemac_softc_t sc;
        char xname[16];

        snprintf(xname, sizeof(xname), "%s%d", lc_cd.cd_name, cf->cf_unit);

        return lemac_isa_find(&sc, xname, ia, 0);
}

static void
lemac_isa_attach(device_t parent, device_t self, void *aux)
{
        lemac_softc_t *sc = device_private(self);
        struct isa_attach_args *ia = aux;

        sc->sc_dev = self;
        (void) lemac_isa_find(sc, device_xname(self), ia, 1);
}