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
52int pcibmatch(device_t, cfdata_t, void *);
53
54CFATTACH_DECL3_NEW(pcib, sizeof(struct pcib_softc),
55 pcibmatch, pcibattach, pcibdetach, NULL, pcibrescan, pcibchilddet,
56 DVF_DETACH_SHUTDOWN);
57
58void pcib_callback(device_t);
59
60int
61pcibmatch(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
183void
184pcibattach(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
204int
205pcibdetach(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
215void
216pcibchilddet(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
224int
225pcibrescan(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
246void
247pcib_callback(device_t self)
248{
249 pcibrescan(self, "isabus", NULL);
250}
251