pcib.c revision 1.2
1 /* $NetBSD: pcib.c,v 1.2 2007/12/09 20:27:49 jmcneill 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: pcib.c,v 1.2 2007/12/09 20:27:49 jmcneill Exp $"); 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/device.h> 46 47 #include <machine/bus.h> 48 49 #include <dev/isa/isavar.h> 50 51 #include <dev/pci/pcivar.h> 52 #include <dev/pci/pcireg.h> 53 54 #include <dev/pci/pcidevs.h> 55 56 #include "isa.h" 57 58 struct pcib_softc { 59 pci_chipset_tag_t sc_pc; 60 pcitag_t sc_tag; 61 }; 62 63 int pcibmatch(struct device *, struct cfdata *, void *); 64 void pcibattach(struct device *, struct device *, void *); 65 66 CFATTACH_DECL_NEW(pcib, sizeof(struct pcib_softc), 67 pcibmatch, pcibattach, NULL, NULL); 68 69 void pcib_callback(struct device *); 70 71 int 72 pcibmatch(struct device *parent, struct cfdata *match, void *aux) 73 { 74 struct pci_attach_args *pa = aux; 75 76 #if 0 77 /* 78 * PCI-ISA bridges are matched on class/subclass. 79 * This list contains only the bridges where correct 80 * (or incorrect) behaviour is not yet confirmed. 81 */ 82 switch (PCI_VENDOR(pa->pa_id)) { 83 case PCI_VENDOR_INTEL: 84 switch (PCI_PRODUCT(pa->pa_id)) { 85 case PCI_PRODUCT_INTEL_82426EX: 86 case PCI_PRODUCT_INTEL_82380AB: 87 return (1); 88 } 89 break; 90 91 case PCI_VENDOR_UMC: 92 switch (PCI_PRODUCT(pa->pa_id)) { 93 case PCI_PRODUCT_UMC_UM8886F: 94 case PCI_PRODUCT_UMC_UM82C886: 95 return (1); 96 } 97 break; 98 case PCI_VENDOR_ALI: 99 switch (PCI_PRODUCT(pa->pa_id)) { 100 case PCI_PRODUCT_ALI_M1449: 101 case PCI_PRODUCT_ALI_M1543: 102 return (1); 103 } 104 break; 105 case PCI_VENDOR_COMPAQ: 106 switch (PCI_PRODUCT(pa->pa_id)) { 107 case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE: 108 return (1); 109 } 110 break; 111 case PCI_VENDOR_VIATECH: 112 switch (PCI_PRODUCT(pa->pa_id)) { 113 case PCI_PRODUCT_VIATECH_VT82C570MV: 114 case PCI_PRODUCT_VIATECH_VT82C586_ISA: 115 return (1); 116 } 117 break; 118 } 119 #endif 120 121 /* 122 * some special cases: 123 */ 124 switch (PCI_VENDOR(pa->pa_id)) { 125 case PCI_VENDOR_INTEL: 126 switch (PCI_PRODUCT(pa->pa_id)) { 127 case PCI_PRODUCT_INTEL_SIO: 128 /* 129 * The Intel SIO identifies itself as a 130 * miscellaneous prehistoric. 131 */ 132 case PCI_PRODUCT_INTEL_82371MX: 133 /* 134 * The Intel 82371MX identifies itself erroneously as a 135 * miscellaneous bridge. 136 */ 137 case PCI_PRODUCT_INTEL_82371AB_ISA: 138 /* 139 * Some Intel 82371AB PCI-ISA bridge identifies 140 * itself as miscellaneous bridge. 141 */ 142 return (1); 143 } 144 break; 145 case PCI_VENDOR_SIS: 146 switch (PCI_PRODUCT(pa->pa_id)) { 147 case PCI_PRODUCT_SIS_85C503: 148 /* 149 * The SIS 85C503 identifies itself as a 150 * miscellaneous prehistoric. 151 */ 152 return (1); 153 } 154 break; 155 case PCI_VENDOR_VIATECH: 156 switch (PCI_PRODUCT(pa->pa_id)) { 157 case PCI_PRODUCT_VIATECH_VT82C686A_SMB: 158 /* 159 * The VIA VT82C686A SMBus Controller itself as 160 * ISA bridge, but it's wrong ! 161 */ 162 return (0); 163 } 164 /* 165 * The Cyrix cs5530 PCI host bridge does not have a broken 166 * latch on the i8254 clock core, unlike its predecessors 167 * the cs5510 and cs5520. This reverses the setting from 168 * i386/i386/identcpu.c where it arguably should not have 169 * been set in the first place. XXX 170 */ 171 case PCI_VENDOR_CYRIX: 172 switch (PCI_PRODUCT(pa->pa_id)) { 173 case PCI_PRODUCT_CYRIX_CX5530_PCIB: 174 { 175 extern int clock_broken_latch; 176 177 clock_broken_latch = 0; 178 } 179 return(1); 180 } 181 break; 182 } 183 184 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 185 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 186 return (1); 187 } 188 189 return (0); 190 } 191 192 void 193 pcibattach(struct device *parent, struct device *self, void *aux) 194 { 195 struct pcib_softc *sc = device_private(self); 196 struct pci_attach_args *pa = aux; 197 char devinfo[256]; 198 199 aprint_naive("\n"); 200 aprint_normal("\n"); 201 202 /* 203 * Just print out a description and defer configuration 204 * until all PCI devices have been attached. 205 */ 206 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 207 aprint_normal("%s: %s (rev. 0x%02x)\n", self->dv_xname, devinfo, 208 PCI_REVISION(pa->pa_class)); 209 210 sc->sc_pc = pa->pa_pc; 211 sc->sc_tag = pa->pa_tag; 212 213 /* If a more specific pcib implementation has already registered a 214 * power handler, don't overwrite it. 215 */ 216 if (!device_pmf_is_registered(self)) { 217 if (!pmf_device_register(self, NULL, NULL)) 218 aprint_error_dev(self, "couldn't establish power handler\n"); 219 } 220 221 config_defer(self, pcib_callback); 222 } 223 224 void 225 pcib_callback(struct device *self) 226 { 227 struct isabus_attach_args iba; 228 229 /* 230 * Attach the ISA bus behind this bridge. 231 */ 232 memset(&iba, 0, sizeof(iba)); 233 iba.iba_iot = X86_BUS_SPACE_IO; 234 iba.iba_memt = X86_BUS_SPACE_MEM; 235 #if NISA > 0 236 iba.iba_dmat = &isa_bus_dma_tag; 237 #endif 238 config_found_ia(self, "isabus", &iba, isabusprint); 239 } 240
Indexes created Mon Sep 22 13:09:51 GMT 2025