1 /* $NetBSD: pceb.c,v 1.8 2021/08/07 16:19:03 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 1.8 2021/08/07 16:19:03 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,
57 pcebmatch, pcebattach, NULL, NULL);
58
59 void pceb_callback(device_t);
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
pcebmatch(device_t parent,cfdata_t match,void * aux)68 pcebmatch(device_t parent, cfdata_t 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
pcebattach(device_t parent,device_t self,void * aux)97 pcebattach(device_t parent, device_t 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_dev(self, "%s (rev. 0x%02x)\n", 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
pceb_callback(device_t self)127 pceb_callback(device_t 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(self, &ea.ea_eba, eisabusprint,
141 CFARGS(.iattr = "eisabus"));
142
143 /*
144 * Attach the ISA bus behind this bridge.
145 */
146 memset(&ea, 0, sizeof(ea));
147 ea.ea_iba.iba_iot = &genppc_isa_io_space_tag;
148 ea.ea_iba.iba_memt = &genppc_isa_mem_space_tag;
149 #if NISA > 0
150 ea.ea_iba.iba_dmat = &isa_bus_dma_tag;
151 #endif
152 config_found(self, &ea.ea_iba, isabusprint,
153 CFARGS(.iattr = "isabus"));
154 }
155