pceb.c revision 1.21 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(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,
69 void *aux)
70 {
71 struct pci_attach_args *pa = aux;
72
73 /*
74 * Match anything which claims to be PCI-EISA bridge.
75 */
76 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
77 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_EISA)
78 return (1);
79
80 /*
81 * Match some known PCI-EISA bridges explicitly.
82 * XXX this is probably not necessary, should be matched by above
83 * condition
84 */
85 switch (PCI_VENDOR(pa->pa_id)) {
86 case PCI_VENDOR_INTEL:
87 switch (PCI_PRODUCT(pa->pa_id)) {
88 case PCI_PRODUCT_INTEL_PCEB:
89 return (1);
90 }
91 break;
92 }
93
94 return (0);
95 }
96
97 void
98 pcebattach(struct device *parent, struct device *self, void *aux)
99 {
100 struct pci_attach_args *pa = aux;
101 char devinfo[256];
102
103 aprint_naive("\n");
104 aprint_normal("\n");
105
106 /*
107 * Just print out a description and defer configuration
108 * until all PCI devices have been attached.
109 */
110 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
111 aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
112 PCI_REVISION(pa->pa_class));
113
114 config_defer(self, pceb_callback);
115 }
116
117 void
118 pceb_callback(struct device *self)
119 {
120 union pceb_attach_args ea;
121
122 /*
123 * Attach the EISA bus behind this bridge.
124 */
125 memset(&ea, 0, sizeof(ea));
126 ea.ea_eba.eba_iot = X86_BUS_SPACE_IO;
127 ea.ea_eba.eba_memt = X86_BUS_SPACE_MEM;
128 #if NEISA > 0
129 ea.ea_eba.eba_dmat = &eisa_bus_dma_tag;
130 #endif
131 config_found_ia(self, "eisabus", &ea.ea_eba, eisabusprint);
132
133 /*
134 * Attach the ISA bus behind this bridge.
135 */
136 memset(&ea, 0, sizeof(ea));
137 ea.ea_iba.iba_iot = X86_BUS_SPACE_IO;
138 ea.ea_iba.iba_memt = X86_BUS_SPACE_MEM;
139 #if NISA > 0
140 ea.ea_iba.iba_dmat = &isa_bus_dma_tag;
141 #endif
142 config_found_ia(self, "isabus", &ea.ea_iba, isabusprint);
143 }
144