sys/arch/i386/pci/pcmb.c

   1 /*      $NetBSD: pcmb.c,v 1.17 2008/04/28 20:23:25 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe and Jaromir Dolecek.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * "Driver" for PCI-MCA Bridges.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: pcmb.c,v 1.17 2008/04/28 20:23:25 martin Exp $");
  38
  39 #include <sys/types.h>
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/device.h>
  43
  44 #include <machine/bus.h>
  45
  46 #include <dev/mca/mcavar.h>
  47
  48 #include <dev/pci/pcivar.h>
  49 #include <dev/pci/pcireg.h>
  50
  51 #include <dev/pci/pcidevs.h>
  52
  53 #include "mca.h"
  54
  55 int     pcmbmatch(device_t, cfdata_t, void *);
  56 void    pcmbattach(device_t, device_t, void *);
  57
  58 CFATTACH_DECL_NEW(pcmb, 0, pcmbmatch, pcmbattach, NULL, NULL);
  59
  60 void    pcmb_callback(device_t);
  61
  62 int
  63 pcmbmatch(device_t parent, cfdata_t match, void *aux)
  64 {
  65         struct pci_attach_args *pa = aux;
  66
  67         /*
  68          * Match anything which claims to be PCI-MCA bridge.
  69          */
  70         if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE
  71             && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_MC)
  72                 return (1);
  73
  74         return (0);
  75 }
  76
  77 void
  78 pcmbattach(device_t parent, device_t self, void *aux)
  79 {
  80         struct pci_attach_args *pa = aux;
  81         char devinfo[256];
  82
  83         aprint_naive("\n");
  84         aprint_normal("\n");
  85
  86         /*
  87          * Just print out a description and defer configuration
  88          * until all PCI devices have been attached.
  89          */
  90         pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
  91         aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
  92             PCI_REVISION(pa->pa_class));
  93
  94         config_defer(self, pcmb_callback);
  95 }
  96
  97 void
  98 pcmb_callback(device_t self)
  99 {
 100         struct mcabus_attach_args ma;
 101
 102         /*
 103          * Attach MCA bus behind this bridge.
 104          */
 105         ma.mba_iot = X86_BUS_SPACE_IO;
 106         ma.mba_memt = X86_BUS_SPACE_MEM;
 107 #if NMCA > 0
 108         ma.mba_dmat = &mca_bus_dma_tag;
 109 #endif
 110         ma.mba_mc = NULL;
 111         ma.mba_bus = 0;
 112         config_found_ia(self, "mcabus", &ma, mcabusprint);
 113 }