1 /* $NetBSD: pceb.c,v 1.26 2021/08/07 16:18:55 thorpej 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 1.26 2021/08/07 16:18:55 thorpej 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 <sys/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
pcebmatch(device_t parent,cfdata_t match,void * aux)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
pcebattach(device_t parent,device_t self,void * aux)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
pceb_callback(device_t self)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(self, &ea.ea_eba, eisabusprint,
130 CFARGS(.iattr = "eisabus"));
131
132 /*
133 * Attach the ISA bus behind this bridge.
134 */
135 memset(&ea, 0, sizeof(ea));
136 ea.ea_iba.iba_iot = x86_bus_space_io;
137 ea.ea_iba.iba_memt = x86_bus_space_mem;
138 #if NISA > 0
139 ea.ea_iba.iba_dmat = &isa_bus_dma_tag;
140 #endif
141 config_found(self, &ea.ea_iba, isabusprint,
142 CFARGS(.iattr = "isabus"));
143 }
144