/*      $NetBSD: scsirom.c,v 1.22 2021/08/07 16:19:07 thorpej Exp $     */

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

/*
 * SCSI BIOS ROM.
 * Used to probe the board.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: scsirom.c,v 1.22 2021/08/07 16:19:07 thorpej Exp $");

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

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

#include <arch/x68k/dev/intiovar.h>
#include <arch/x68k/dev/scsiromvar.h>

struct {
        paddr_t addr, devaddr;
        int intr;
        const char id[7];
} scsirom_descr[] = {{
        0x00fc0000, 0x00e96020, 108, "SCSIIN"
}, {
        0x00ea0020, 0x00ea0000, 246, "SCSIEX"
}};

#define SCSIROM_ID      0x24

/*
 * autoconf stuff
 */
static int scsirom_find(device_t, struct intio_attach_args *);
static int scsirom_match(device_t, cfdata_t, void *);
static void scsirom_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(scsirom, sizeof(struct scsirom_softc),
    scsirom_match, scsirom_attach, NULL, NULL);

static int
scsirom_find(device_t parent, struct intio_attach_args *ia)
{
        bus_space_handle_t ioh;
        char buf[10];
        int which;
        int r = -1;

        if (ia->ia_addr == scsirom_descr[INTERNAL].addr)
                which = INTERNAL;
        else if (ia->ia_addr == scsirom_descr[EXTERNAL].addr)
                which = EXTERNAL;
        else
                return -1;

        ia->ia_size = 0x1fe0;
        if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY))
                return -1;

        if (bus_space_map(ia->ia_bst, ia->ia_addr, ia->ia_size, 0, &ioh) < 0)
                return -1;
        if (badaddr((void *)IIOV(ia->ia_addr+SCSIROM_ID))) {
                bus_space_unmap(ia->ia_bst, ioh, ia->ia_size);
                return -1;
        }
        bus_space_read_region_1(ia->ia_bst, ioh, SCSIROM_ID, buf, 6);
        if (memcmp(buf, scsirom_descr[which].id, 6) == 0)
                r = which;
        bus_space_unmap(ia->ia_bst, ioh, ia->ia_size);

        return r;
}

static int
scsirom_match(device_t parent, cfdata_t cf, void *aux)
{
        struct intio_attach_args *ia = aux;
        int r;

        if (strcmp(ia->ia_name, "scsirom") != 0)
                return 0;

        if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) {
                ia->ia_addr = scsirom_descr[0].addr;
                r = scsirom_find(parent, ia);
                if (r == INTERNAL)
                        return 1;
                ia->ia_addr = scsirom_descr[1].addr;
                r = scsirom_find(parent, ia);
                if (r == EXTERNAL)
                        return 1;
                return 0;
        } else if (scsirom_find(parent, ia) >= 0)
                return 1;
        else
                return 0;
}

static void
scsirom_attach(device_t parent, device_t self, void *aux)
{
        struct scsirom_softc *sc = device_private(self);
        struct intio_attach_args *ia = aux;
        int r __diagused;
        cfdata_t cf;

        sc->sc_addr = ia->ia_addr;
        sc->sc_which = scsirom_find(parent, ia);
#ifdef DIAGNOSTIC
        if (sc->sc_which < 0)
                panic("SCSIROM curruption??");
#endif
        r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
#ifdef DIAGNOSTIC
        if (r)
                panic("IO map for SCSIROM corruption??");
#endif

        ia->ia_addr = scsirom_descr[sc->sc_which].devaddr;
        if (ia->ia_intr == INTIOCF_INTR_DEFAULT)
                ia->ia_intr = scsirom_descr[sc->sc_which].intr;

        if (sc->sc_which == INTERNAL)
                aprint_normal(": On-board at %p\n", (void *)ia->ia_addr);
        else
                aprint_normal(": External at %p\n", (void *)ia->ia_addr);

        cf = config_search(self, ia,
            CFARGS_NONE);
        if (cf) {
                config_attach(self, cf, ia, NULL, CFARGS_NONE);
        } else {
                aprint_normal_dev(self, "no matching device; ignored.\n");
        }

        return;
}