/*      $OpenBSD: if_ne_cbus.c,v 1.5 2024/06/01 00:48:16 aoyama Exp $   */
/*      $NetBSD: if_ne_isa.c,v 1.6 1998/07/05 06:49:13 jonathan Exp $   */

/*-
 * Copyright (c) 1997 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
 * NASA Ames Research Center.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * Driver for C-bus NE2000 based Ethernet board
 *  based on: OpenBSD:src/sys/dev/isa/if_ne_isa.c
 */

/*
 * Supported boards:
 * - Allied Telesis  CentreCOM LA-98 series
 *   Available configuration:
 *   INT(IRQ): 0(3), 1(5), 2(6), 3(9), 4(10), 5(12), 6(13) (default: INT0)
 *   I/O address: 0xc8d0, 0xc2d0, 0xc4d0, 0xc460, 0xc9d0, 0xcad0, 0xcbd0
 *              (default 0xc8d0)
 */

#include "bpfilter.h"

#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/device.h>

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

#include <netinet/in.h>
#include <netinet/if_ether.h>

#if NBPFILTER > 0
#include <net/bpf.h>
#endif

#include <machine/board.h>              /* PC_BASE */
#include <machine/bus.h>
#include <machine/intr.h>

#include <dev/ic/dp8390reg.h>
#include <dev/ic/dp8390var.h>

#include <dev/ic/ne2000reg.h>
#include <dev/ic/ne2000var.h>

#include <dev/ic/rtl80x9reg.h>
#include <dev/ic/rtl80x9var.h>

#include <arch/luna88k/cbus/cbusvar.h>

/* bus space tag for if_ne_cbus */
struct luna88k_bus_space_tag ne_cbus_io_bst = {
        .bs_stride_1 = 0,
        .bs_stride_2 = 0,
        .bs_stride_4 = 0,
        .bs_stride_8 = 0,       /* not used */
        .bs_offset = PCEXIO_BASE,
        .bs_flags = TAG_LITTLE_ENDIAN
};

int     ne_cbus_match(struct device *, void *, void *);
void    ne_cbus_attach(struct device *, struct device *, void *);

struct ne_cbus_softc {
        struct  ne2000_softc sc_ne2000;         /* real "ne2000" softc */

        /* C-bus specific goo. */
        void    *sc_ih;                         /* interrupt cookie */
};

const struct cfattach ne_cbus_ca = {
        sizeof(struct ne_cbus_softc), ne_cbus_match, ne_cbus_attach
};

int
ne_cbus_match(struct device *parent, void *match, void *aux)
{
        struct ne_cbus_softc *csc = match;
        struct ne2000_softc *nsc = &csc->sc_ne2000;
        struct dp8390_softc *dsc = &nsc->sc_dp8390;
        struct cbus_attach_args *caa = aux;
        bus_space_tag_t nict = &ne_cbus_io_bst;
        bus_space_handle_t nich;
        bus_space_tag_t asict;
        bus_space_handle_t asich;
        struct cfdata *cf = match;

        if (strcmp(caa->ca_name, cf->cf_driver->cd_name) != 0)
                return (0);

        SET_TAG_LITTLE_ENDIAN(nict);

        caa->ca_iobase = cf->cf_iobase;
        caa->ca_int    = cf->cf_int;

        /* Disallow wildcarded values. */
        if (caa->ca_int ==  -1)
                return (0);
        if (caa->ca_iobase == -1)
                return (0);

#if 0   /* XXX: Is this not true on PC-9801? */
        /* Make sure this is a valid NE[12]000 i/o address. */
        if ((caa->ca_iobase & 0x1f) != 0)
                return (0);
#endif
        /* Map i/o space. */
        if (bus_space_map(nict, caa->ca_iobase, NE2000_NPORTS, 0, &nich))
                return (0);

        asict = nict;
        if (bus_space_subregion(nict, nich, NE2000_ASIC_OFFSET,
            NE2000_ASIC_NPORTS, &asich))
                goto out;

        dsc->sc_regt = nict;
        dsc->sc_regh = nich;

        nsc->sc_asict = asict;
        nsc->sc_asich = asich;

        /* Look for an NE2000-compatible card. */
        nsc->sc_type = ne2000_detect(nsc);

        if (nsc->sc_type)
                caa->ca_iosize = NE2000_NPORTS;

 out:
        bus_space_unmap(nict, nich, NE2000_NPORTS);
        return (nsc->sc_type);
}

void
ne_cbus_attach(struct device *parent, struct device *self, void *aux)
{
        struct ne_cbus_softc *csc = (void *)self;
        struct ne2000_softc *nsc = &csc->sc_ne2000;
        struct dp8390_softc *dsc = &nsc->sc_dp8390;
        struct cbus_attach_args *caa = aux;
        bus_space_tag_t nict = &ne_cbus_io_bst;
        bus_space_handle_t nich;
        bus_space_tag_t asict = nict;
        bus_space_handle_t asich;
        const char *typestr;

        /* Map i/o space. */
        if (bus_space_map(nict, caa->ca_iobase, NE2000_NPORTS, 0, &nich)) {
                printf("%s: can't map i/o space\n", dsc->sc_dev.dv_xname);
                return;
        }

        if (bus_space_subregion(nict, nich, NE2000_ASIC_OFFSET,
            NE2000_ASIC_NPORTS, &asich)) {
                printf("%s: can't subregion i/o space\n", dsc->sc_dev.dv_xname);
                return;
        }

        dsc->sc_regt = nict;
        dsc->sc_regh = nich;

        nsc->sc_asict = asict;
        nsc->sc_asich = asich;

        /* Look for an NE2000-compatible card. */
        nsc->sc_type = ne2000_detect(nsc);

        switch (nsc->sc_type) {
        case NE2000_TYPE_NE1000:
                typestr = "NE1000";
                break;

        case NE2000_TYPE_NE2000:
                typestr = "NE2000";
                /*
                 * Check for a Realtek 8019.
                 */
                bus_space_write_1(nict, nich, ED_P0_CR,
                    ED_CR_PAGE_0 | ED_CR_STP);
                if (bus_space_read_1(nict, nich, NERTL_RTL0_8019ID0) ==
                                                                RTL0_8019ID0 &&
                    bus_space_read_1(nict, nich, NERTL_RTL0_8019ID1) ==
                                                                RTL0_8019ID1) {
                        typestr = "NE2000 (RTL8019)";
                        dsc->sc_mediachange = rtl80x9_mediachange;
                        dsc->sc_mediastatus = rtl80x9_mediastatus;
                        dsc->init_card = rtl80x9_init_card;
                        dsc->sc_media_init = rtl80x9_media_init;
                }
                break;

        default:
                printf(": where did the card go?!\n");
                return;
        }

        printf(", %s", typestr);

        /* This interface is always enabled. */
        dsc->sc_enabled = 1;

        /*
         * Do generic NE2000 attach.  This will read the station address
         * from the EEPROM.
         */
        ne2000_attach(nsc, NULL);

        /* Establish the interrupt handler. */
        if (cbus_isrlink(dp8390_intr, dsc, caa->ca_int, IPL_NET,
            dsc->sc_dev.dv_xname) != 0)
                printf(": couldn't establish interrupt handler\n");
}