1 /* $NetBSD: pcib.c,v 1.4 2021/08/07 16:18:51 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: pcib.c,v 1.4 2021/08/07 16:18:51 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/device.h>
38
39
40 #include <evbmips/loongson/autoconf.h>
41
42 #include <dev/pci/pcireg.h>
43 #include <dev/pci/pcivar.h>
44 #include <dev/pci/pcidevs.h>
45
46 #include <dev/isa/isavar.h>
47
48 #include <evbmips/loongson/loongson_bus_defs.h>
49 #include <evbmips/loongson/dev/pcibvar.h>
50
51 #include "isa.h"
52
53 int pcibmatch(device_t, cfdata_t, void *);
54 void pcib_callback(device_t);
55
56 CFATTACH_DECL3_NEW(pcib, sizeof(struct pcib_softc),
57 pcibmatch, pcibattach, pcibdetach, NULL, pcibrescan, pcibchilddet,
58 DVF_DETACH_SHUTDOWN);
59
60
61 int
pcibmatch(device_t parent,cfdata_t match,void * aux)62 pcibmatch(device_t parent, cfdata_t match, void *aux)
63 {
64 struct pci_attach_args *pa = aux;
65
66 switch (PCI_VENDOR(pa->pa_id)) {
67 case PCI_VENDOR_INTEL:
68 switch (PCI_PRODUCT(pa->pa_id)) {
69 case PCI_PRODUCT_INTEL_SIO:
70 case PCI_PRODUCT_INTEL_82371MX:
71 case PCI_PRODUCT_INTEL_82371AB_ISA:
72 case PCI_PRODUCT_INTEL_82440MX_ISA:
73 /* The above bridges mis-identify themselves */
74 return (1);
75 }
76 break;
77 case PCI_VENDOR_SIS:
78 switch (PCI_PRODUCT(pa->pa_id)) {
79 case PCI_PRODUCT_SIS_85C503:
80 /* mis-identifies itself as a miscellaneous prehistoric */
81 return (1);
82 }
83 break;
84 case PCI_VENDOR_VIATECH:
85 switch (PCI_PRODUCT(pa->pa_id)) {
86 case PCI_PRODUCT_VIATECH_VT82C686A_PWR:
87 /* mis-identifies itself as a ISA bridge */
88 return (0);
89 }
90 break;
91 }
92
93 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
94 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA)
95 return (1);
96
97 return (0);
98 }
99
100 void
pcibattach(device_t parent,device_t self,void * aux)101 pcibattach(device_t parent, device_t self, void *aux)
102 {
103 struct pcib_softc *sc = device_private(self);
104 struct pci_attach_args *pa = (struct pci_attach_args *)aux;
105 char devinfo[256];
106
107 aprint_naive("\n");
108
109 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
110 aprint_normal(": %s (rev. 0x%02x)\n", devinfo,
111 PCI_REVISION(pa->pa_class));
112
113 /*
114 * Wait until all PCI devices are attached before attaching isa;
115 * otherwise this might mess the interrupt setup on some systems.
116 */
117 sc->sc_pc = pa->pa_pc;
118 sc->sc_tag = pa->pa_tag;
119
120 if (!pmf_device_register(self, NULL, NULL))
121 aprint_error_dev(self, "couldn't establish power handler\n");
122 config_defer(self, pcib_callback);
123 }
124
125 int
pcibdetach(device_t self,int flags)126 pcibdetach(device_t self, int flags)
127 {
128 int rc;
129
130 if ((rc = config_detach_children(self, flags)) != 0)
131 return rc;
132 pmf_device_deregister(self);
133 return 0;
134 }
135
136 void
pcibchilddet(device_t self,device_t child)137 pcibchilddet(device_t self, device_t child)
138 {
139 struct pcib_softc *sc = device_private(self);
140
141 if (sc->sc_isabus == child)
142 sc->sc_isabus = NULL;
143 }
144
145 int
pcibrescan(device_t self,const char * ifattr,const int * loc)146 pcibrescan(device_t self, const char *ifattr, const int *loc)
147 {
148 struct pcib_softc *sc = device_private(self);
149 struct isabus_attach_args iba;
150
151 /*
152 * pcib only carries "isabus", but this can also be used
153 * by other drivers that carry additional interface attributes.
154 */
155 if (ifattr_match(ifattr, "isabus") && sc->sc_isabus == NULL) {
156 /*
157 * Attach the ISA bus behind this bridge.
158 */
159 memset(&iba, 0, sizeof(iba));
160 iba.iba_iot = &bonito_iot;
161 iba.iba_memt = &bonito_memt;
162 #if NISA > 0
163 iba.iba_dmat = &bonito_dmat;
164 #endif
165 iba.iba_ic = sys_platform->isa_chipset;
166
167 if (iba.iba_ic != NULL)
168 sc->sc_isabus =
169 config_found(self, &iba, isabusprint,
170 CFARGS(.iattr = "isabus"));
171 }
172 return 0;
173 }
174
175
176 void
pcib_callback(device_t self)177 pcib_callback(device_t self)
178 {
179 pcibrescan(self, "isabus", NULL);
180 }
181