/*      $NetBSD: if_sn_nubus.c,v 1.30 2021/02/20 09:36:30 rin Exp $     */

/*
 * Copyright (C) 1997 Allen Briggs
 * 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. 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 Allen Briggs
 * 4. 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_sn_nubus.c,v 1.30 2021/02/20 09:36:30 rin Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/ioctl.h>

#include <sys/rndsource.h>

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

#include <machine/bus.h>
#include <machine/viareg.h>

#include <dev/ic/dp83932reg.h>
#include <dev/ic/dp83932var.h>

#include <mac68k/nubus/nubus.h>
#include <mac68k/dev/if_snvar.h>

static int      sn_nubus_match(device_t, cfdata_t, void *);
static void     sn_nubus_attach(device_t, device_t, void *);
static int      sn_nb_card_vendor(bus_space_tag_t, bus_space_handle_t,
                    struct nubus_attach_args *);

CFATTACH_DECL_NEW(sn_nubus, sizeof(struct sonic_softc),
    sn_nubus_match, sn_nubus_attach, NULL, NULL);


static int
sn_nubus_match(device_t parent, cfdata_t cf, void *aux)
{
        struct nubus_attach_args *na = aux;
        bus_space_handle_t bsh;
        int rv;

        if (bus_space_map(na->na_tag,
            NUBUS_SLOT2PA(na->slot), NBMEMSIZE, 0, &bsh))
                return 0;

        rv = 0;

        if (na->category == NUBUS_CATEGORY_NETWORK &&
            na->type == NUBUS_TYPE_ETHERNET) {
                switch (sn_nb_card_vendor(na->na_tag, bsh, na)) {
                default:
                        break;

                case SN_VENDOR_APPLE:
                case SN_VENDOR_APPLE16:
                case SN_VENDOR_ASANTELC:
                case SN_VENDOR_DAYNA:
                        rv = 1;
                        break;
                }
        }

        bus_space_unmap(na->na_tag, bsh, NBMEMSIZE);

        return rv;
}

/*
 * Install interface into kernel networking data structures
 */
static void
sn_nubus_attach(device_t parent, device_t self, void *aux)
{
        struct sonic_softc *sc = device_private(self);
        struct nubus_attach_args *na = aux;
        int i, success, offset;
        bus_space_tag_t bst;
        bus_space_handle_t bsh, tmp_bsh;
        uint8_t myaddr[ETHER_ADDR_LEN];
        const char *cardtype;

        bst = na->na_tag;
        if (bus_space_map(bst, NUBUS_SLOT2PA(na->slot), NBMEMSIZE, 0, &bsh)) {
                aprint_error(": failed to map memory space.\n");
                return;
        }

        sc->sc_dev = self;
        sc->sc_st = bst;
        sc->sc_dmat = na->na_dmat;

        cardtype = nubus_get_card_name(bst, bsh, na->fmt);

        success = 0;
        offset = 0;

        switch (sn_nb_card_vendor(bst, bsh, na)) {
        case SN_VENDOR_DAYNA:
                sc->sc_dcr = DCR_BMS | DCR_RFT1 | DCR_TFT0;
                sc->sc_dcr2 = 0;
                sc->sc_32bit = 1;       /* 32 bit card */

                if (bus_space_subregion(bst, bsh,
                    0x00180000, SONIC_NREGS * 4, &sc->sc_sh)) {
                        aprint_error(": failed to map register space.\n");
                        break;
                }

                if (bus_space_subregion(bst, bsh,
                    0x00ffe004, ETHER_ADDR_LEN, &tmp_bsh)) {
                        aprint_error(": failed to map ROM space.\n");
                        break;
                }

                sn_get_enaddr(bst, tmp_bsh, 0, myaddr);

                offset = 2;
                success = 1;
                break;

        case SN_VENDOR_APPLE:
                sc->sc_dcr = DCR_BMS | DCR_RFT1 | DCR_TFT0;
                sc->sc_dcr2 = 0;
                sc->sc_32bit = 1; /* 32 bit card */

                if (bus_space_subregion(bst, bsh,
                    0x0, SONIC_NREGS * 4, &sc->sc_sh)) {
                        aprint_error(": failed to map register space.\n");
                        break;
                }

                if (bus_space_subregion(bst, bsh,
                    0x40000, ETHER_ADDR_LEN, &tmp_bsh)) {
                        aprint_error(": failed to map ROM space.\n");
                        break;
                }

                sn_get_enaddr(bst, tmp_bsh, 0, myaddr);

                offset = 0;
                success = 1;
                break;
        
        case SN_VENDOR_APPLE16:
                sc->sc_dcr = DCR_EXBUS | DCR_BMS | DCR_PO1 |
                    DCR_RFT1 | DCR_TFT0;
                sc->sc_dcr2 = 0;
                sc->sc_32bit = 0; /* 16 bit card */

                if (bus_space_subregion(bst, bsh,
                    0x0, SONIC_NREGS * 4, &sc->sc_sh)) {
                        aprint_error(": failed to map register space.\n");
                        break;
                }

                if (bus_space_subregion(bst, bsh,
                    0x40000, ETHER_ADDR_LEN, &tmp_bsh)) {
                        aprint_error(": failed to map ROM space.\n");
                        break;
                }

                sn_get_enaddr(bst, tmp_bsh, 0, myaddr);

                offset = 0;
                success = 1;
                break;

        case SN_VENDOR_ASANTELC: /* Macintosh LC Ethernet Adapter */
                sc->sc_dcr = DCR_BMS | DCR_PO1 | DCR_RFT1 | DCR_TFT0;
                sc->sc_dcr2 = 0;
                sc->sc_32bit = 0; /* 16 bit card */

                if (bus_space_subregion(bst, bsh,
                    0x0, SONIC_NREGS * 4, &sc->sc_sh)) {
                        aprint_error(": failed to map register space.\n");
                        break;
                }

                if (bus_space_subregion(bst, bsh,
                    0x400000, ETHER_ADDR_LEN, &tmp_bsh)) {
                        aprint_error(": failed to map ROM space.\n");
                        break;
                }

                sn_get_enaddr(bst, tmp_bsh, 0, myaddr);

                offset = 0;
                success = 1;
                break;

        default:
                /*
                 * You can't actually get this default, the snmatch
                 * will fail for unknown hardware. If you're adding support
                 * for a new card, the following defaults are a
                 * good starting point.
                 */
                sc->sc_dcr = DCR_SBUS | DCR_BMS | DCR_RFT1 | DCR_TFT0;
                sc->sc_dcr2 = 0;
                sc->sc_32bit = 1;
                success = 0;
                aprint_error(": unknown card: attachment incomplete.\n");
        }

        if (!success) {
                bus_space_unmap(bst, bsh, NBMEMSIZE);
                return;
        }

        /* Regs are addressed as words, big endian. */
        for (i = 0; i < SONIC_NREGS; i++) {
                sc->sc_regmap[i] = (bus_size_t)((i * 4) + offset);
        }

        sc->sc_bigendian = 1;

        aprint_error(": %s\n", cardtype);

        add_nubus_intr(na->slot, (void (*)(void *))sonic_intr, (void *)sc);

        sonic_attach(sc, myaddr);

        return;
}

static int
sn_nb_card_vendor(bus_space_tag_t bst, bus_space_handle_t bsh,
    struct nubus_attach_args *na)
{
        int vendor = SN_VENDOR_UNKNOWN;

        switch (na->drsw) {
        case NUBUS_DRSW_3COM:
                if (na->drhw == NUBUS_DRHW_APPLE_SNT)
                        vendor = SN_VENDOR_APPLE;
                else if (na->drhw == NUBUS_DRHW_APPLE_SN)
                        vendor = SN_VENDOR_APPLE16;
                break;
        case NUBUS_DRSW_APPLE:
                if (na->drhw == NUBUS_DRHW_ASANTE_LC)
                        vendor = SN_VENDOR_ASANTELC;
                else
                        vendor = SN_VENDOR_APPLE;
                break;
        case NUBUS_DRSW_TECHWORKS:
                vendor = SN_VENDOR_APPLE;
                break;
        case NUBUS_DRSW_GATOR:
                if (na->drhw == NUBUS_DRHW_KINETICS &&
                    strncmp(nubus_get_card_name(bst, bsh, na->fmt),
                    "EtherPort", 9) != 0)
                        vendor = SN_VENDOR_DAYNA;
                break;
        case NUBUS_DRSW_DAYNA:
                vendor = SN_VENDOR_DAYNA;
                break;
        }

        return vendor;
}