1 /* $OpenBSD: pcib.c,v 1.20 2006/09/19 11:06:34 jsg Exp $ */
2 /* $NetBSD: pcib.c,v 1.6 1997/06/06 23:29:16 thorpej Exp $ */
3
4 /*-
5 * Copyright (c) 1996 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/device.h>
43
44 #include <machine/bus.h>
45 #include <dev/isa/isavar.h>
46
47 #include <dev/pci/pcivar.h>
48 #include <dev/pci/pcireg.h>
49
50 #include <dev/pci/pcidevs.h>
51
52 #include "isa.h"
53 #include "pcibios.h"
54 #if NPCIBIOS > 0
55 #include <i386/pci/pcibiosvar.h>
56 #endif
57
58 int pcibmatch(struct device *, void *, void *);
59 void pcibattach(struct device *, struct device *, void *);
60 void pcib_callback(struct device *);
61 int pcib_print(void *, const char *);
62
63 struct cfattach pcib_ca = {
64 sizeof(struct device), pcibmatch, pcibattach
65 };
66
67 struct cfdriver pcib_cd = {
68 NULL, "pcib", DV_DULL
69 };
70
71 int
72 pcibmatch(struct device *parent, void *match, void *aux)
73 {
74 struct pci_attach_args *pa = aux;
75
76 switch (PCI_VENDOR(pa->pa_id)) {
77 case PCI_VENDOR_INTEL:
78 switch (PCI_PRODUCT(pa->pa_id)) {
79 case PCI_PRODUCT_INTEL_SIO:
80 case PCI_PRODUCT_INTEL_82371MX:
81 case PCI_PRODUCT_INTEL_82371AB_ISA:
82 case PCI_PRODUCT_INTEL_82440MX_ISA:
83 /* The above bridges mis-identify themselves */
84 return (1);
85 }
86 case PCI_VENDOR_SIS:
87 switch (PCI_PRODUCT(pa->pa_id)) {
88 case PCI_PRODUCT_SIS_85C503:
89 /* mis-identifies itself as a miscellaneous prehistoric */
90 return (1);
91 }
92 case PCI_VENDOR_VIATECH:
93 switch (PCI_PRODUCT(pa->pa_id)) {
94 case PCI_PRODUCT_VIATECH_VT82C686A_SMB:
95 /* mis-identifies itself as a ISA bridge */
96 return (0);
97 }
98 }
99
100 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
101 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA)
102 return (1);
103
104 return (0);
105 }
106
107 void
108 pcibattach(struct device *parent, struct device *self, void *aux)
109 {
110 /*
111 * Cannot attach isa bus now; must postpone for various reasons
112 */
113 printf("\n");
114
115 config_defer(self, pcib_callback);
116 }
117
118 void
119 pcib_callback(struct device *self)
120 {
121 struct isabus_attach_args iba;
122
123 #if NPCIBIOS > 0
124 pci_intr_post_fixup();
125 #endif
126
127 /*
128 * Attach the ISA bus behind this bridge.
129 */
130 memset(&iba, 0, sizeof(iba));
131 iba.iba_busname = "isa";
132 iba.iba_iot = I386_BUS_SPACE_IO;
133 iba.iba_memt = I386_BUS_SPACE_MEM;
134 #if NISADMA > 0
135 iba.iba_dmat = &isa_bus_dma_tag;
136 #endif
137 config_found(self, &iba, pcib_print);
138 }
139
140 int
141 pcib_print(void *aux, const char *pnp)
142 {
143 /* Only ISAs can attach to pcib's; easy. */
144 if (pnp)
145 printf("isa at %s", pnp);
146 return (UNCONF);
147 }