/*-
 * Copyright (c) 2012 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Paul Fleischer <paul@xpg.dk>
 *
 * 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.
 */
#include <sys/cdefs.h>

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/time.h>

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

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

#include <arch/arm/s3c2xx0/s3c2440reg.h>
#include <arch/arm/s3c2xx0/s3c2440var.h>

#include <arch/arm/s3c2xx0/s3c2440_dma.h>

#include <dev/ic/dm9000var.h>
#include <dev/ic/dm9000reg.h>

#include "opt_mini2440.h"

int     dme_ssextio_match(device_t, cfdata_t, void *);
void    dme_ssextio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(dme_ssextio, sizeof(struct dme_softc),
    dme_ssextio_match, dme_ssextio_attach, NULL, NULL);

int
dme_ssextio_match(device_t parent, cfdata_t cf, void *aux)
{
        struct s3c2xx0_attach_args *sa = aux;
        bus_space_tag_t iot = sa->sa_iot;
        bus_space_handle_t ioh;
        vaddr_t ioaddr;
        struct dme_softc sc; /* Used to temporarily access the device for
                               probing */
        int have_io = 0;
        int result = 0;
        uint8_t vendorId[2];
        uint8_t productId[2];

        /* Map memory to access the device during probing */
        ioaddr = sa->sa_addr;
        if (bus_space_map(iot, ioaddr, DM9000_IOSIZE, 0, &ioh))
                goto out;
        have_io = 1;

        /* Zero the device description */
        memset(&sc, 0, sizeof sc);
        sc.sc_iot = iot;
        sc.sc_ioh = ioh;
        sc.dme_io = 0x0;
        sc.dme_data = 0x4;

        vendorId[0] = dme_read(&sc, DM9000_VID0);
        vendorId[1] = dme_read(&sc, DM9000_VID1);

        productId[0] = dme_read(&sc, DM9000_PID0);
        productId[1] = dme_read(&sc, DM9000_PID1);

        if (vendorId[0] == 0x46 && vendorId[1] == 0x0a &&
            productId[0] == 0x00 && productId[1] == 0x90 ) {
                result = 1;
        }

out:
        if (have_io)
                bus_space_unmap(iot, ioh, DM9000_IOSIZE);

        return result;
}


void
dme_ssextio_attach(device_t parent, device_t self, void *aux)
{
        struct dme_softc           *sc = device_private(self);
        struct s3c2xx0_attach_args *sa = aux;
        vaddr_t                     ioaddr;
        uint8_t                 enaddr[ETHER_ADDR_LEN];

#ifdef MINI2440_ETHER_ADDR_FIXED
        static uint8_t enaddr_default[ETHER_ADDR_LEN] = {MINI2440_ETHER_ADDR_FIXED};
#endif

        sc->sc_iot = sa->sa_iot;
        sc->sc_dev = self;

        ioaddr = sa->sa_addr;
        if (bus_space_map(sc->sc_iot, ioaddr, DM9000_IOSIZE, 0, &sc->sc_ioh)) {
                aprint_error(": unable to map i/o space\n");
                return;
        }


        sc->sc_ih = s3c2440_extint_establish(sa->sa_intr, IPL_NET, IST_EDGE_RISING, dme_intr, sc);
        if (sc->sc_ih == NULL) {
                aprint_error(": unable to establish interrupt\n");
                return;
        }

        sc->dme_io = 0x0;
        sc->dme_data = 0x4;

        aprint_normal("\n");

        if (! ether_getaddr(self, enaddr)) {
#ifdef MINI2440_ETHER_ADDR_FIXED
                memcpy(enaddr, &enaddr_default, sizeof(enaddr));
#else
                aprint_error_dev(self, "Unable to get mac-address property\n");
                return;
#endif
        }

        dme_attach(sc, enaddr);
}