sys/arch/prep/pci/pceb.c

   1 /*      $NetBSD: pceb.c,v 1.2 2007/10/17 19:56:51 garbled 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 1.2 2007/10/17 19:56:51 garbled 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(struct device *, struct cfdata *, void *);
  54 void    pcebattach(struct device *, struct device *, void *);
  55
  56 CFATTACH_DECL(pceb, sizeof(struct device),
  57     pcebmatch, pcebattach, NULL, NULL);
  58
  59 void    pceb_callback(struct device *);
  60
  61 union pceb_attach_args {
  62         const char *ea_name;                    /* XXX should be common */
  63         struct isabus_attach_args ea_iba;
  64         struct eisabus_attach_args ea_eba;
  65 };
  66
  67 int
  68 pcebmatch(struct device *parent, struct cfdata *match, void *aux)
  69 {
  70         struct pci_attach_args *pa = aux;
  71
  72         /*
  73          * Match anything which claims to be PCI-EISA bridge.
  74          */
  75         if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
  76             PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_EISA)
  77                 return (1);
  78
  79         /*
  80          * Match some known PCI-EISA bridges explicitly.
  81          * XXX this is probably not necessary, should be matched by above
  82          * condition
  83          */
  84         switch (PCI_VENDOR(pa->pa_id)) {
  85         case PCI_VENDOR_INTEL:
  86                 switch (PCI_PRODUCT(pa->pa_id)) {
  87                 case PCI_PRODUCT_INTEL_PCEB:
  88                         return (1);
  89                 }
  90                 break;
  91         }
  92
  93         return (0);
  94 }
  95
  96 void
  97 pcebattach(struct device *parent, struct device *self, void *aux)
  98 {
  99         struct pci_attach_args *pa = aux;
 100         char devinfo[256];
 101         int error;
 102
 103         aprint_normal("\n");
 104
 105         /*
 106          * Just print out a description and defer configuration
 107          * until all PCI devices have been attached.
 108          */
 109         pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
 110         aprint_normal("%s: %s (rev. 0x%02x)\n", self->dv_xname, devinfo,
 111             PCI_REVISION(pa->pa_class));
 112
 113         prep_eisa_io_space_tag.pbs_extent = prep_io_space_tag.pbs_extent;
 114         error = bus_space_init(&prep_eisa_io_space_tag, "eisa-ioport", NULL, 0);
 115         if (error)
 116                 panic("prep_bus_space_init: can't init eisa io tag");
 117
 118         prep_eisa_mem_space_tag.pbs_extent = prep_mem_space_tag.pbs_extent;
 119         error = bus_space_init(&prep_eisa_mem_space_tag, "eisa-iomem", NULL, 0);
 120         if (error)
 121                 panic("prep_bus_space_init: can't init eisa mem tag");
 122
 123         config_defer(self, pceb_callback);
 124 }
 125
 126 void
 127 pceb_callback(struct device *self)
 128 {
 129         union pceb_attach_args ea;
 130
 131         /*
 132          * Attach the EISA bus behind this bridge.
 133          */
 134         memset(&ea, 0, sizeof(ea));
 135         ea.ea_eba.eba_iot = &prep_eisa_io_space_tag;
 136         ea.ea_eba.eba_memt = &prep_eisa_mem_space_tag;
 137 #if NEISA > 0
 138         ea.ea_eba.eba_dmat = &eisa_bus_dma_tag;
 139 #endif
 140         config_found_ia(self, "eisabus", &ea.ea_eba, eisabusprint);
 141
 142         /*
 143          * Attach the ISA bus behind this bridge.
 144          */
 145         memset(&ea, 0, sizeof(ea));
 146         ea.ea_iba.iba_iot = &genppc_isa_io_space_tag;
 147         ea.ea_iba.iba_memt = &genppc_isa_mem_space_tag;
 148 #if NISA > 0
 149         ea.ea_iba.iba_dmat = &isa_bus_dma_tag;
 150 #endif
 151         config_found_ia(self, "isabus", &ea.ea_iba, isabusprint);
 152 }