pcib.c revision 1.4.4.1
1 /* $NetBSD: pcib.c,v 1.4.4.1 2008/07/28 14:37:26 simonb 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 1.4.4.1 2008/07/28 14:37:26 simonb 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 <machine/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, struct cfdata *, void *); 53 void pcibattach(device_t, device_t, void *); 54 int pcibdetach(device_t, int); 55 void pcibchilddet(device_t, device_t); 56 57 CFATTACH_DECL2_NEW(pcib, sizeof(struct pcib_softc), 58 pcibmatch, pcibattach, pcibdetach, NULL, NULL, pcibchilddet); 59 60 void pcib_callback(device_t); 61 62 int 63 pcibmatch(device_t parent, struct cfdata *match, void *aux) 64 { 65 struct pci_attach_args *pa = aux; 66 67 #if 0 68 /* 69 * PCI-ISA bridges are matched on class/subclass. 70 * This list contains only the bridges where correct 71 * (or incorrect) behaviour is not yet confirmed. 72 */ 73 switch (PCI_VENDOR(pa->pa_id)) { 74 case PCI_VENDOR_INTEL: 75 switch (PCI_PRODUCT(pa->pa_id)) { 76 case PCI_PRODUCT_INTEL_82426EX: 77 case PCI_PRODUCT_INTEL_82380AB: 78 return (1); 79 } 80 break; 81 82 case PCI_VENDOR_UMC: 83 switch (PCI_PRODUCT(pa->pa_id)) { 84 case PCI_PRODUCT_UMC_UM8886F: 85 case PCI_PRODUCT_UMC_UM82C886: 86 return (1); 87 } 88 break; 89 case PCI_VENDOR_ALI: 90 switch (PCI_PRODUCT(pa->pa_id)) { 91 case PCI_PRODUCT_ALI_M1449: 92 case PCI_PRODUCT_ALI_M1543: 93 return (1); 94 } 95 break; 96 case PCI_VENDOR_COMPAQ: 97 switch (PCI_PRODUCT(pa->pa_id)) { 98 case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE: 99 return (1); 100 } 101 break; 102 case PCI_VENDOR_VIATECH: 103 switch (PCI_PRODUCT(pa->pa_id)) { 104 case PCI_PRODUCT_VIATECH_VT82C570MV: 105 case PCI_PRODUCT_VIATECH_VT82C586_ISA: 106 return (1); 107 } 108 break; 109 } 110 #endif 111 112 /* 113 * some special cases: 114 */ 115 switch (PCI_VENDOR(pa->pa_id)) { 116 case PCI_VENDOR_INTEL: 117 switch (PCI_PRODUCT(pa->pa_id)) { 118 case PCI_PRODUCT_INTEL_SIO: 119 /* 120 * The Intel SIO identifies itself as a 121 * miscellaneous prehistoric. 122 */ 123 case PCI_PRODUCT_INTEL_82371MX: 124 /* 125 * The Intel 82371MX identifies itself erroneously as a 126 * miscellaneous bridge. 127 */ 128 case PCI_PRODUCT_INTEL_82371AB_ISA: 129 /* 130 * Some Intel 82371AB PCI-ISA bridge identifies 131 * itself as miscellaneous bridge. 132 */ 133 return (1); 134 } 135 break; 136 case PCI_VENDOR_SIS: 137 switch (PCI_PRODUCT(pa->pa_id)) { 138 case PCI_PRODUCT_SIS_85C503: 139 /* 140 * The SIS 85C503 identifies itself as a 141 * miscellaneous prehistoric. 142 */ 143 return (1); 144 } 145 break; 146 case PCI_VENDOR_VIATECH: 147 switch (PCI_PRODUCT(pa->pa_id)) { 148 case PCI_PRODUCT_VIATECH_VT82C686A_SMB: 149 /* 150 * The VIA VT82C686A SMBus Controller itself as 151 * ISA bridge, but it's wrong ! 152 */ 153 return (0); 154 } 155 /* 156 * The Cyrix cs5530 PCI host bridge does not have a broken 157 * latch on the i8254 clock core, unlike its predecessors 158 * the cs5510 and cs5520. This reverses the setting from 159 * i386/i386/identcpu.c where it arguably should not have 160 * been set in the first place. XXX 161 */ 162 case PCI_VENDOR_CYRIX: 163 switch (PCI_PRODUCT(pa->pa_id)) { 164 case PCI_PRODUCT_CYRIX_CX5530_PCIB: 165 { 166 extern int clock_broken_latch; 167 168 clock_broken_latch = 0; 169 } 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 char devinfo[256]; 189 190 aprint_naive("\n"); 191 aprint_normal("\n"); 192 193 /* 194 * Just print out a description and defer configuration 195 * until all PCI devices have been attached. 196 */ 197 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 198 aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo, 199 PCI_REVISION(pa->pa_class)); 200 201 sc->sc_pc = pa->pa_pc; 202 sc->sc_tag = pa->pa_tag; 203 204 /* If a more specific pcib implementation has already registered a 205 * power handler, don't overwrite it. 206 */ 207 if (!device_pmf_is_registered(self)) { 208 if (!pmf_device_register(self, NULL, NULL)) 209 aprint_error_dev(self, "couldn't establish power handler\n"); 210 } 211 212 config_defer(self, pcib_callback); 213 } 214 215 int 216 pcibdetach(device_t self, int flags) 217 { 218 int rc; 219 220 if ((rc = config_detach_children(self, flags)) != 0) 221 return rc; 222 pmf_device_deregister(self); 223 return 0; 224 } 225 226 void 227 pcibchilddet(device_t self, device_t child) 228 { 229 /* we keep no references to children, so do nothing */ 230 } 231 232 void 233 pcib_callback(device_t self) 234 { 235 struct isabus_attach_args iba; 236 237 /* 238 * Attach the ISA bus behind this bridge. 239 */ 240 memset(&iba, 0, sizeof(iba)); 241 iba.iba_iot = X86_BUS_SPACE_IO; 242 iba.iba_memt = X86_BUS_SPACE_MEM; 243 #if NISA > 0 244 iba.iba_dmat = &isa_bus_dma_tag; 245 #endif 246 config_found_ia(self, "isabus", &iba, isabusprint); 247 } 248
Indexes created Fri Oct 03 02:09:57 GMT 2025