/*      $NetBSD: if_hme_sbus.c,v 1.35 2025/10/15 01:36:25 thorpej Exp $ */

/*-
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Paul Kranenburg.
 *
 * 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.
 */

/*
 * SBus front-end device driver for the HME ethernet device.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_hme_sbus.c,v 1.35 2025/10/15 01:36:25 thorpej Exp $");

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

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

#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>

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

#include <dev/sbus/sbusvar.h>
#include <dev/ic/hmevar.h>

struct hmesbus_softc {
        struct  hme_softc       hsc_hme;        /* HME device */
        /* sbus specific stuff here */
};

int     hmematch_sbus(device_t, cfdata_t, void *);
void    hmeattach_sbus(device_t, device_t, void *);

CFATTACH_DECL_NEW(hme_sbus, sizeof(struct hmesbus_softc),
    hmematch_sbus, hmeattach_sbus, NULL, NULL);

int
hmematch_sbus(device_t parent, cfdata_t cf, void *aux)
{
        struct sbus_attach_args *sa = aux;

        return (strcmp(cf->cf_name, sa->sa_name) == 0 ||
            strcmp("SUNW,qfe", sa->sa_name) == 0 ||
            strcmp("SUNW,hme", sa->sa_name) == 0);
}

void
hmeattach_sbus(device_t parent, device_t self, void *aux)
{
        struct sbus_attach_args *sa = aux;
        struct hmesbus_softc *hsc = device_private(self);
        struct hme_softc *sc = &hsc->hsc_hme;
        struct sbus_softc *sbsc = device_private(parent);
        uint32_t burst, sbusburst;
        int node;

        sc->sc_dev = self;
        node = sa->sa_node;

        /* Pass on the bus tags */
        sc->sc_bustag = sa->sa_bustag;
        sc->sc_dmatag = sa->sa_dmatag;

        aprint_normal(": Sun Happy Meal Ethernet (%s)\n",
            sa->sa_name);

        if (sa->sa_nreg < 5) {
                aprint_error_dev(self, "only %d register sets\n",
                    sa->sa_nreg);
                return;
        }

        if (! ether_getaddr(self, sc->sc_enaddr)) {
                aprint_error_dev(self, "unable to get MAC address\n");
                return;
        }

        /*
         * Map five register banks:
         *
         *      bank 0: HME SEB registers
         *      bank 1: HME ETX registers
         *      bank 2: HME ERX registers
         *      bank 3: HME MAC registers
         *      bank 4: HME MIF registers
         *
         */
        if (sbus_bus_map(sa->sa_bustag,
                         sa->sa_reg[0].oa_space,
                         sa->sa_reg[0].oa_base,
                         (bus_size_t)sa->sa_reg[0].oa_size,
                         0, &sc->sc_seb) != 0) {
                aprint_error_dev(self, "cannot map SEB registers\n");
                return;
        }
        if (sbus_bus_map(sa->sa_bustag,
                         sa->sa_reg[1].oa_space,
                         sa->sa_reg[1].oa_base,
                         (bus_size_t)sa->sa_reg[1].oa_size,
                         0, &sc->sc_etx) != 0) {
                aprint_error_dev(self, "cannot map ETX registers\n");
                return;
        }
        if (sbus_bus_map(sa->sa_bustag,
                         sa->sa_reg[2].oa_space,
                         sa->sa_reg[2].oa_base,
                         (bus_size_t)sa->sa_reg[2].oa_size,
                         0, &sc->sc_erx) != 0) {
                aprint_error_dev(self, "cannot map ERX registers\n");
                return;
        }
        if (sbus_bus_map(sa->sa_bustag,
                         sa->sa_reg[3].oa_space,
                         sa->sa_reg[3].oa_base,
                         (bus_size_t)sa->sa_reg[3].oa_size,
                         0, &sc->sc_mac) != 0) {
                aprint_error_dev(self, "cannot map MAC registers\n");
                return;
        }
        if (sbus_bus_map(sa->sa_bustag,
                         sa->sa_reg[4].oa_space,
                         sa->sa_reg[4].oa_base,
                         (bus_size_t)sa->sa_reg[4].oa_size,
                         0, &sc->sc_mif) != 0) {
                aprint_error_dev(self, "cannot map MIF registers\n");
                return;
        }

        /*
         * Get transfer burst size from PROM and pass it on
         * to the back-end driver.
         */
        sbusburst = sbsc->sc_burst;
        if (sbusburst == 0)
                sbusburst = SBUS_BURST_32 - 1; /* 1->16 */

        burst = prom_getpropint(node, "burst-sizes", -1);
        if (burst == -1)
                /* take SBus burst sizes */
                burst = sbusburst;

        /* Clamp at parent's burst sizes */
        burst &= sbusburst;

        /* Translate into plain numerical format */
        sc->sc_burst =  (burst & SBUS_BURST_32) ? 32 :
                        (burst & SBUS_BURST_16) ? 16 : 0;

        sc->sc_pci = 0; /* XXXXX should all be done in bus_dma. */
        hme_config(sc);

        /* Establish interrupt handler */
        if (sa->sa_nintr != 0)
                (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET,
                                         hme_intr, sc);
}