/*      $NetBSD: if_sn_jazzio.c,v 1.16 2023/12/20 06:36:02 thorpej Exp $        */

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * 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.
 */

/*
 * Microsoft JAZZ front-end for the National Semiconductor DP83932
 * Systems-Oriented Network Interface Controller (SONIC).
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_sn_jazzio.c,v 1.16 2023/12/20 06:36:02 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/kcore.h>

#include <sys/rndsource.h>

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

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

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

#include <arc/arc/arcbios.h>
#include <arc/jazz/jazziovar.h>

int     sonic_jazzio_match(device_t, cfdata_t, void *);
void    sonic_jazzio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(sn_jazzio, sizeof(struct sonic_softc),
    sonic_jazzio_match, sonic_jazzio_attach, NULL, NULL);

int
sonic_jazzio_match(device_t parent, cfdata_t cf, void *aux)
{
        struct jazzio_attach_args *ja = aux;

        if (strcmp(ja->ja_name, "SONIC") != 0)
                return 0;

        return 1;
}

void
sonic_jazzio_attach(device_t parent, device_t self, void *aux)
{
        struct sonic_softc *sc = device_private(self);
        struct jazzio_attach_args *ja = aux;
        int i;
        uint8_t enaddr[ETHER_ADDR_LEN];

        sc->sc_dev = self;
        sc->sc_st = ja->ja_bust;
        sc->sc_dmat = ja->ja_dmat;

        aprint_normal(": SONIC Ethernet\n");

        /* Map the device. */
        if (bus_space_map(sc->sc_st, ja->ja_addr, SONIC_NREGS * 4,
            0, &sc->sc_sh) != 0) {
                aprint_error_dev(sc->sc_dev, "unable to map SONIC registers\n");
                return;
        }

        /* We run in 32-bit mode. */
        sc->sc_32bit = 1;

        /* BMODE is set for little-endian. */
        sc->sc_bigendian = 0;

        /* Regs are 16-bit, plus 16-bit pad. */
        for (i = 0; i < SONIC_NREGS; i++)
                sc->sc_regmap[i] = i * 4;

        /*
         * Configure DCR:
         *
         *      - Latched bug retry
         *      - Synchronous bus (memory cycle 2 clocks)
         *      - 0 wait states added (WC0,WC1 == 0,0)
         *      - 4 byte Rx DMA threshold (RFT0,RFT1 == 0,0)
         *      - 28 byte Tx DMA threshold (TFT0,TFT1 == 1,1)
         *        XXX There was a comment
         *              "XXX RFT & TFT according to MIPS manual"
         *            in old MD sys/arch/arc/dev/if_sn.c in Attic.
         */
        sc->sc_dcr = DCR_LBR | DCR_SBUS | DCR_TFT0 | DCR_TFT1;
        sc->sc_dcr2 = 0;

        /* Hook up our interrupt handler. */
        jazzio_intr_establish(ja->ja_intr, sonic_intr, sc);

        /* The Ethernet address is from the product ID. */
        memcpy(enaddr, arc_product_id, sizeof(enaddr));

        /* Finish off the attach. */
        sonic_attach(sc, enaddr);
}