sys/arch/i386/pci/pceb.c

   1 /*      $NetBSD: pceb.c,v 1.21 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.
   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 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: pceb.c,v 1.21 2008/04/28 20:23:25 martin Exp $");
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/device.h>
  39
  40 #include <machine/bus.h>
  41
  42 #include <dev/isa/isavar.h>
  43 #include <dev/eisa/eisavar.h>
  44
  45 #include <dev/pci/pcivar.h>
  46 #include <dev/pci/pcireg.h>
  47
  48 #include <dev/pci/pcidevs.h>
  49
  50 #include "eisa.h"
  51 #include "isa.h"
  52
  53 int     pcebmatch(device_t , cfdata_t, void *);
  54 void    pcebattach(device_t, device_t, void *);
  55
  56 CFATTACH_DECL_NEW(pceb, 0, pcebmatch, pcebattach, NULL, NULL);
  57
  58 void    pceb_callback(device_t);
  59
  60 union pceb_attach_args {
  61         const char *ea_name;                    /* XXX should be common */
  62         struct isabus_attach_args ea_iba;
  63         struct eisabus_attach_args ea_eba;
  64 };
  65
  66 int
  67 pcebmatch(device_t parent, cfdata_t match, void *aux)
  68 {
  69         struct pci_attach_args *pa = aux;
  70
  71         /*
  72          * Match anything which claims to be PCI-EISA bridge.
  73          */
  74         if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
  75             PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_EISA)
  76                 return (1);
  77
  78         /*
  79          * Match some known PCI-EISA bridges explicitly.
  80          * XXX this is probably not necessary, should be matched by above
  81          * condition
  82          */
  83         switch (PCI_VENDOR(pa->pa_id)) {
  84         case PCI_VENDOR_INTEL:
  85                 switch (PCI_PRODUCT(pa->pa_id)) {
  86                 case PCI_PRODUCT_INTEL_PCEB:
  87                         return (1);
  88                 }
  89                 break;
  90         }
  91
  92         return (0);
  93 }
  94
  95 void
  96 pcebattach(device_t parent, device_t self, void *aux)
  97 {
  98         struct pci_attach_args *pa = aux;
  99         char devinfo[256];
 100
 101         aprint_naive("\n");
 102         aprint_normal("\n");
 103
 104         /*
 105          * Just print out a description and defer configuration
 106          * until all PCI devices have been attached.
 107          */
 108         pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
 109         aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
 110             PCI_REVISION(pa->pa_class));
 111
 112         config_defer(self, pceb_callback);
 113 }
 114
 115 void
 116 pceb_callback(device_t self)
 117 {
 118         union pceb_attach_args ea;
 119
 120         /*
 121          * Attach the EISA bus behind this bridge.
 122          */
 123         memset(&ea, 0, sizeof(ea));
 124         ea.ea_eba.eba_iot = X86_BUS_SPACE_IO;
 125         ea.ea_eba.eba_memt = X86_BUS_SPACE_MEM;
 126 #if NEISA > 0
 127         ea.ea_eba.eba_dmat = &eisa_bus_dma_tag;
 128 #endif
 129         config_found_ia(self, "eisabus", &ea.ea_eba, eisabusprint);
 130
 131         /*
 132          * Attach the ISA bus behind this bridge.
 133          */
 134         memset(&ea, 0, sizeof(ea));
 135         ea.ea_iba.iba_iot = X86_BUS_SPACE_IO;
 136         ea.ea_iba.iba_memt = X86_BUS_SPACE_MEM;
 137 #if NISA > 0
 138         ea.ea_iba.iba_dmat = &isa_bus_dma_tag;
 139 #endif
 140         config_found_ia(self, "isabus", &ea.ea_iba, isabusprint);
 141 }