/*      $NetBSD: pcmb.c,v 1.22 2021/08/07 16:18:55 thorpej Exp $        */

/*-
* Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe and Jaromir Dolecek.
*
* 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.
*/

/*
* "Driver" for PCI-MCA Bridges.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pcmb.c,v 1.22 2021/08/07 16:18:55 thorpej Exp $");

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

#include <dev/mca/mcavar.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>

#include <dev/pci/pcidevs.h>

#include "mca.h"

int     pcmbmatch(device_t, cfdata_t, void *);
void    pcmbattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(pcmb, 0, pcmbmatch, pcmbattach, NULL, NULL);

void    pcmb_callback(device_t);

int
pcmbmatch(device_t parent, cfdata_t match, void *aux)
{
       struct pci_attach_args *pa = aux;

       /*
        * Match anything which claims to be PCI-MCA bridge.
        */
       if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE
           && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_MC)
               return (1);

       return (0);
}

void
pcmbattach(device_t parent, device_t self, void *aux)
{
       struct pci_attach_args *pa = aux;
       char devinfo[256];

       aprint_naive("\n");
       aprint_normal("\n");

       /*
        * Just print out a description and defer configuration
        * until all PCI devices have been attached.
        */
       pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
       aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
           PCI_REVISION(pa->pa_class));

       config_defer(self, pcmb_callback);
}

void
pcmb_callback(device_t self)
{
       struct mcabus_attach_args ma;

       /*
        * Attach MCA bus behind this bridge.
        */
       ma.mba_iot = x86_bus_space_io;
       ma.mba_memt = x86_bus_space_mem;
#if NMCA > 0
       ma.mba_dmat = &mca_bus_dma_tag;
#endif
       ma.mba_mc = NULL;
       ma.mba_bus = 0;
       config_found(self, &ma, mcabusprint, CFARGS_NONE);
}