/*      $NetBSD: if_le.c,v 1.53 2024/12/20 23:52:00 tsutsui Exp $       */

/*-
 * Copyright (c) 1996 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Adam Glass and Gordon W. Ross.
 *
 * 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>
__KERNEL_RCSID(0, "$NetBSD: if_le.c,v 1.53 2024/12/20 23:52:00 tsutsui Exp $");

#include "opt_inet.h"

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

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

#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif

#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/dvma.h>
#include <machine/idprom.h>

#include <dev/ic/lancereg.h>
#include <dev/ic/lancevar.h>
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>

#define LE_MEMSIZE      0x4000  /* 16K */

/*
 * LANCE registers.
 * The real stuff is in dev/ic/am7990reg.h
 */
struct lereg1 {
        volatile uint16_t       ler1_rdp;       /* data port */
        volatile uint16_t       ler1_rap;       /* register select port */
};

/*
 * Ethernet software status per interface.
 * The real stuff is in dev/ic/am7990var.h
 */
struct  le_softc {
        struct  am7990_softc sc_am7990; /* glue to MI code */

        struct  lereg1 *sc_r1;          /* LANCE registers */
};

static int      le_match(device_t, cfdata_t, void *);
static void     le_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(le, sizeof(struct le_softc),
    le_match, le_attach, NULL, NULL);

#if defined(_KERNEL_OPT)
#include "opt_ddb.h"
#endif

#ifdef DDB
#define integrate
#define hide
#else
#define integrate       static inline
#define hide            static
#endif

hide void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
hide uint16_t lerdcsr(struct lance_softc *, uint16_t);

hide void
lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
{
        struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;

        ler1->ler1_rap = port;
        ler1->ler1_rdp = val;
}

hide uint16_t
lerdcsr(struct lance_softc *sc, uint16_t port)
{
        struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
        uint16_t val;

        ler1->ler1_rap = port;
        val = ler1->ler1_rdp;
        return (val);
}

int
le_match(device_t parent, cfdata_t cf, void *aux)
{
        struct confargs *ca = aux;

        /* Make sure there is something there... */
        if (bus_peek(ca->ca_bustype, ca->ca_paddr, 2) == -1)
                return (0);

        /* Default interrupt priority. */
        if (ca->ca_intpri == -1)
                ca->ca_intpri = 3;

        return (1);
}

void
le_attach(device_t parent, device_t self, void *aux)
{
        struct le_softc *lesc = device_private(self);
        struct lance_softc *sc = &lesc->sc_am7990.lsc;
        struct confargs *ca = aux;

        sc->sc_dev = self;
        lesc->sc_r1 = bus_mapin(ca->ca_bustype,
            ca->ca_paddr, sizeof(struct lereg1));

        sc->sc_memsize = LE_MEMSIZE;
        sc->sc_mem = dvma_malloc(sc->sc_memsize);
        sc->sc_addr = dvma_kvtopa(sc->sc_mem, ca->ca_bustype);
#ifdef  _SUN3X_
        sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
#else
        sc->sc_conf3 = LE_C3_BSWP;
#endif

        idprom_etheraddr(sc->sc_enaddr);

        sc->sc_copytodesc = lance_copytobuf_contig;
        sc->sc_copyfromdesc = lance_copyfrombuf_contig;
        sc->sc_copytobuf = lance_copytobuf_contig;
        sc->sc_copyfrombuf = lance_copyfrombuf_contig;
        sc->sc_zerobuf = lance_zerobuf_contig;

        sc->sc_rdcsr = lerdcsr;
        sc->sc_wrcsr = lewrcsr;
        sc->sc_hwinit = NULL;

        am7990_config(&lesc->sc_am7990);

        /* Install interrupt handler. */
        isr_add_autovect(am7990_intr, (void *)sc, ca->ca_intpri);
}