/*      $NetBSD: mainbus.c,v 1.23 2021/08/07 16:18:57 thorpej Exp $     */

/*
 * Copyright (c) 1996 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.23 2021/08/07 16:18:57 thorpej Exp $");

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

#define _M68K_BUS_DMA_PRIVATE
#include <machine/autoconf.h>

static int      mainbus_match(device_t, cfdata_t, void *);
static void     mainbus_attach(device_t, device_t, void *);
static int      mainbus_search(device_t, cfdata_t,
                               const int *ldesc, void *);

CFATTACH_DECL_NEW(mainbus, 0,
    mainbus_match, mainbus_attach, NULL, NULL);

struct m68k_bus_dma_tag mac68k_bus_dma_tag = {
        NULL,                                   /* _cookie */

        0,                                      /* _boundary */

        _bus_dmamap_create,                     /* _dmamap_create */
        _bus_dmamap_destroy,                    /* _dmamap_destroy */
        _bus_dmamap_load_direct,                /* _dmamap_load */
        _bus_dmamap_load_mbuf_direct,           /* _dmamap_load_mbuf */
        _bus_dmamap_load_uio_direct,            /* _dmamap_load_uio */
        _bus_dmamap_load_raw_direct,            /* _dmamap_load_raw */
        _bus_dmamap_unload,                     /* _dmamap_unload */
        _bus_dmamap_sync,                       /* _dmamap_sync */
  
        _bus_dmamem_alloc,                      /* _dmamem_alloc */
        _bus_dmamem_free,                       /* _dmamem_free */
        _bus_dmamem_map,                        /* _dmamem_map */
        _bus_dmamem_unmap,                      /* _dmamem_unmap */
        _bus_dmamem_mmap                        /* _dmamem_mmap */
};

static int
mainbus_match(device_t parent, cfdata_t cf, void *aux)
{
        static int mainbus_matched = 0;

        /* Allow only one instance. */
        if (mainbus_matched)
                return (0);

        mainbus_matched = 1;
        return 1;
}

static void
mainbus_attach(device_t parent, device_t self, void *aux)
{
        struct mainbus_attach_args      mba;

        printf("\n");

        mba.mba_bst = MAC68K_BUS_SPACE_MEM;
        mba.mba_dmat = &mac68k_bus_dma_tag;

        /* Search for and attach children. */
        config_search(self, &mba,
            CFARGS(.search = mainbus_search));
}

static int
mainbus_search(device_t parent, cfdata_t cf,
               const int *ldesc, void *aux)
{
        if (config_probe(parent, cf, aux))
                config_attach(parent, cf, aux, NULL, CFARGS_NONE);
        return 0;
}