1 | /* $NetBSD: pcib.c,v 1.15 2012/04/06 20:38:52 plunky 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 1.15 2012/04/06 20:38:52 plunky 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 | |
44 | #include <dev/pci/pcivar.h> |
45 | #include <dev/pci/pcireg.h> |
46 | |
47 | #include <dev/pci/pcidevs.h> |
48 | |
49 | #include "isa.h" |
50 | #include "pcibvar.h" |
51 | |
52 | int pcibmatch(device_t, cfdata_t, void *); |
53 | |
54 | CFATTACH_DECL3_NEW(pcib, sizeof(struct pcib_softc), |
55 | pcibmatch, pcibattach, pcibdetach, NULL, pcibrescan, pcibchilddet, |
56 | DVF_DETACH_SHUTDOWN); |
57 | |
58 | void pcib_callback(device_t); |
59 | |
60 | int |
61 | pcibmatch(device_t parent, cfdata_t match, void *aux) |
62 | { |
63 | struct pci_attach_args *pa = aux; |
64 | |
65 | #if 0 |
66 | /* |
67 | * PCI-ISA bridges are matched on class/subclass. |
68 | * This list contains only the bridges where correct |
69 | * (or incorrect) behaviour is not yet confirmed. |
70 | */ |
71 | switch (PCI_VENDOR(pa->pa_id)) { |
72 | case PCI_VENDOR_INTEL: |
73 | switch (PCI_PRODUCT(pa->pa_id)) { |
74 | case PCI_PRODUCT_INTEL_82426EX: |
75 | case PCI_PRODUCT_INTEL_82380AB: |
76 | return (1); |
77 | } |
78 | break; |
79 | |
80 | case PCI_VENDOR_UMC: |
81 | switch (PCI_PRODUCT(pa->pa_id)) { |
82 | case PCI_PRODUCT_UMC_UM8886F: |
83 | case PCI_PRODUCT_UMC_UM82C886: |
84 | return (1); |
85 | } |
86 | break; |
87 | case PCI_VENDOR_ALI: |
88 | switch (PCI_PRODUCT(pa->pa_id)) { |
89 | case PCI_PRODUCT_ALI_M1449: |
90 | case PCI_PRODUCT_ALI_M1543: |
91 | return (1); |
92 | } |
93 | break; |
94 | case PCI_VENDOR_COMPAQ: |
95 | switch (PCI_PRODUCT(pa->pa_id)) { |
96 | case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE: |
97 | return (1); |
98 | } |
99 | break; |
100 | case PCI_VENDOR_VIATECH: |
101 | switch (PCI_PRODUCT(pa->pa_id)) { |
102 | case PCI_PRODUCT_VIATECH_VT82C570MV: |
103 | case PCI_PRODUCT_VIATECH_VT82C586_ISA: |
104 | return (1); |
105 | } |
106 | break; |
107 | } |
108 | #endif |
109 | |
110 | /* |
111 | * some special cases: |
112 | */ |
113 | switch (PCI_VENDOR(pa->pa_id)) { |
114 | case PCI_VENDOR_INTEL: |
115 | switch (PCI_PRODUCT(pa->pa_id)) { |
116 | case PCI_PRODUCT_INTEL_SIO: |
117 | /* |
118 | * The Intel SIO identifies itself as a |
119 | * miscellaneous prehistoric. |
120 | */ |
121 | case PCI_PRODUCT_INTEL_82371MX: |
122 | /* |
123 | * The Intel 82371MX identifies itself erroneously as a |
124 | * miscellaneous bridge. |
125 | */ |
126 | case PCI_PRODUCT_INTEL_82371AB_ISA: |
127 | /* |
128 | * Some Intel 82371AB PCI-ISA bridge identifies |
129 | * itself as miscellaneous bridge. |
130 | */ |
131 | return (1); |
132 | } |
133 | break; |
134 | case PCI_VENDOR_SIS: |
135 | switch (PCI_PRODUCT(pa->pa_id)) { |
136 | case PCI_PRODUCT_SIS_85C503: |
137 | /* |
138 | * The SIS 85C503 identifies itself as a |
139 | * miscellaneous prehistoric. |
140 | */ |
141 | return (1); |
142 | } |
143 | break; |
144 | case PCI_VENDOR_VIATECH: |
145 | switch (PCI_PRODUCT(pa->pa_id)) { |
146 | case PCI_PRODUCT_VIATECH_VT82C686A_SMB: |
147 | /* |
148 | * The VIA VT82C686A SMBus Controller itself as |
149 | * ISA bridge, but it's wrong ! |
150 | */ |
151 | return (0); |
152 | } |
153 | /* |
154 | * The Cyrix cs5530 PCI host bridge does not have a broken |
155 | * latch on the i8254 clock core, unlike its predecessors |
156 | * the cs5510 and cs5520. This reverses the setting from |
157 | * i386/i386/identcpu.c where it arguably should not have |
158 | * been set in the first place. XXX |
159 | */ |
160 | case PCI_VENDOR_CYRIX: |
161 | switch (PCI_PRODUCT(pa->pa_id)) { |
162 | case PCI_PRODUCT_CYRIX_CX5530_PCIB: |
163 | #if !defined(XEN) |
164 | { |
165 | extern int clock_broken_latch; |
166 | |
167 | clock_broken_latch = 0; |
168 | } |
169 | #endif |
170 | return(1); |
171 | } |
172 | break; |
173 | } |
174 | |
175 | if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && |
176 | PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { |
177 | return (1); |
178 | } |
179 | |
180 | return (0); |
181 | } |
182 | |
183 | void |
184 | pcibattach(device_t parent, device_t self, void *aux) |
185 | { |
186 | struct pcib_softc *sc = device_private(self); |
187 | struct pci_attach_args *pa = aux; |
188 | |
189 | /* |
190 | * Just print out a description and defer configuration |
191 | * until all PCI devices have been attached. |
192 | */ |
193 | pci_aprint_devinfo(pa, NULL); |
194 | |
195 | sc->sc_pc = pa->pa_pc; |
196 | sc->sc_tag = pa->pa_tag; |
197 | |
198 | if (!pmf_device_register(self, NULL, NULL)) |
199 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
200 | |
201 | config_defer(self, pcib_callback); |
202 | } |
203 | |
204 | int |
205 | pcibdetach(device_t self, int flags) |
206 | { |
207 | int rc; |
208 | |
209 | if ((rc = config_detach_children(self, flags)) != 0) |
210 | return rc; |
211 | pmf_device_deregister(self); |
212 | return 0; |
213 | } |
214 | |
215 | void |
216 | pcibchilddet(device_t self, device_t child) |
217 | { |
218 | struct pcib_softc *sc = device_private(self); |
219 | |
220 | if (sc->sc_isabus == child) |
221 | sc->sc_isabus = NULL; |
222 | } |
223 | |
224 | int |
225 | pcibrescan(device_t self, const char *ifattr, const int *loc) |
226 | { |
227 | struct pcib_softc *sc = device_private(self); |
228 | struct isabus_attach_args iba; |
229 | |
230 | if (ifattr_match(ifattr, "isabus" ) && sc->sc_isabus == NULL) { |
231 | /* |
232 | * Attach the ISA bus behind this bridge. |
233 | */ |
234 | memset(&iba, 0, sizeof(iba)); |
235 | iba.iba_iot = x86_bus_space_io; |
236 | iba.iba_memt = x86_bus_space_mem; |
237 | #if NISA > 0 |
238 | iba.iba_dmat = &isa_bus_dma_tag; |
239 | #endif |
240 | sc->sc_isabus = |
241 | config_found_ia(self, "isabus" , &iba, isabusprint); |
242 | } |
243 | return 0; |
244 | } |
245 | |
246 | void |
247 | pcib_callback(device_t self) |
248 | { |
249 | pcibrescan(self, "isabus" , NULL); |
250 | } |
251 | |