/* $NetBSD: osiop_jazzio.c,v 1.11 2023/12/20 06:36:02 thorpej Exp $ */

/*-
 * Copyright (c) 2001 Izumi Tsutsui.  All rights reserved.
 *
 * 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 AUTHOR ``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 AUTHOR 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: osiop_jazzio.c,v 1.11 2023/12/20 06:36:02 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/buf.h>

#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>

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

#include <dev/ic/osiopreg.h>
#include <dev/ic/osiopvar.h>

#include <arc/jazz/jazziovar.h>

int osiop_jazzio_match(device_t, cfdata_t, void *);
void osiop_jazzio_attach(device_t, device_t, void *);
int osiop_jazzio_intr(void *);

CFATTACH_DECL_NEW(osiop_jazzio, sizeof(struct osiop_softc),
    osiop_jazzio_match, osiop_jazzio_attach, NULL, NULL);

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

        if (strcmp(ja->ja_name, "NCRC710") != 0)
                return 0;

        return 1;
}

void
osiop_jazzio_attach(device_t parent, device_t self, void *aux)
{
        struct osiop_softc *sc = device_private(self);
        struct jazzio_attach_args *ja = aux;
        int err, scid;

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

        /*
         * Map registers
         */
        err = bus_space_map(sc->sc_bst, ja->ja_addr,
            OSIOP_NREGS, 0, &sc->sc_reg);
        if (err) {
                aprint_error(": failed to map registers, err=%d\n", err);
                return;
        }

        sc->sc_clock_freq = 50; /* MHz */
        sc->sc_ctest7 = 0; /* | OSIOP_CTEST7_TT1 */
        sc->sc_dcntl = OSIOP_DCNTL_EA;

        /* XXX should check ID in BIOS variables? */
        scid = ffs(osiop_read_1(sc, OSIOP_SCID));

        if (scid == 0)
                scid = 7;
        else
                scid--;

        sc->sc_id = scid;

        /*
         * Call common attachment
         */
        osiop_attach(sc);

        /*
         * Set up interrupt handler.
         */
        jazzio_intr_establish(ja->ja_intr,
            (intr_handler_t)osiop_jazzio_intr, sc);
}

/*
 * interrupt handler
 */
int
osiop_jazzio_intr(void *arg)
{
        struct osiop_softc *sc = arg;
        uint8_t istat;

        /* This is potentially nasty, since the IRQ is level triggered... */
        if (sc->sc_flags & OSIOP_INTSOFF)
                return 0;

        istat = osiop_read_1(sc, OSIOP_ISTAT);

        if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
                return 0;

        /* Save interrupt details for the back-end interrupt handler */
        sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
        sc->sc_istat = istat;
        sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);

        /* Deal with the interrupt */
        osiop_intr(sc);

        return 1;
}