pcib.c revision 1.7.2.1
1 /* $NetBSD: pcib.c,v 1.7.2.1 2009/04/28 07:34:56 skrll 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 1.7.2.1 2009/04/28 07:34:56 skrll 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, cfdata_t, 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_DECL3_NEW(pcib, sizeof(struct pcib_softc), 58 pcibmatch, pcibattach, pcibdetach, NULL, NULL, pcibchilddet, 59 DVF_DETACH_SHUTDOWN); 60 61 void pcib_callback(device_t); 62 63 int 64 pcibmatch(device_t parent, cfdata_t match, void *aux) 65 { 66 struct pci_attach_args *pa = aux; 67 68 #if 0 69 /* 70 * PCI-ISA bridges are matched on class/subclass. 71 * This list contains only the bridges where correct 72 * (or incorrect) behaviour is not yet confirmed. 73 */ 74 switch (PCI_VENDOR(pa->pa_id)) { 75 case PCI_VENDOR_INTEL: 76 switch (PCI_PRODUCT(pa->pa_id)) { 77 case PCI_PRODUCT_INTEL_82426EX: 78 case PCI_PRODUCT_INTEL_82380AB: 79 return (1); 80 } 81 break; 82 83 case PCI_VENDOR_UMC: 84 switch (PCI_PRODUCT(pa->pa_id)) { 85 case PCI_PRODUCT_UMC_UM8886F: 86 case PCI_PRODUCT_UMC_UM82C886: 87 return (1); 88 } 89 break; 90 case PCI_VENDOR_ALI: 91 switch (PCI_PRODUCT(pa->pa_id)) { 92 case PCI_PRODUCT_ALI_M1449: 93 case PCI_PRODUCT_ALI_M1543: 94 return (1); 95 } 96 break; 97 case PCI_VENDOR_COMPAQ: 98 switch (PCI_PRODUCT(pa->pa_id)) { 99 case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE: 100 return (1); 101 } 102 break; 103 case PCI_VENDOR_VIATECH: 104 switch (PCI_PRODUCT(pa->pa_id)) { 105 case PCI_PRODUCT_VIATECH_VT82C570MV: 106 case PCI_PRODUCT_VIATECH_VT82C586_ISA: 107 return (1); 108 } 109 break; 110 } 111 #endif 112 113 /* 114 * some special cases: 115 */ 116 switch (PCI_VENDOR(pa->pa_id)) { 117 case PCI_VENDOR_INTEL: 118 switch (PCI_PRODUCT(pa->pa_id)) { 119 case PCI_PRODUCT_INTEL_SIO: 120 /* 121 * The Intel SIO identifies itself as a 122 * miscellaneous prehistoric. 123 */ 124 case PCI_PRODUCT_INTEL_82371MX: 125 /* 126 * The Intel 82371MX identifies itself erroneously as a 127 * miscellaneous bridge. 128 */ 129 case PCI_PRODUCT_INTEL_82371AB_ISA: 130 /* 131 * Some Intel 82371AB PCI-ISA bridge identifies 132 * itself as miscellaneous bridge. 133 */ 134 return (1); 135 } 136 break; 137 case PCI_VENDOR_SIS: 138 switch (PCI_PRODUCT(pa->pa_id)) { 139 case PCI_PRODUCT_SIS_85C503: 140 /* 141 * The SIS 85C503 identifies itself as a 142 * miscellaneous prehistoric. 143 */ 144 return (1); 145 } 146 break; 147 case PCI_VENDOR_VIATECH: 148 switch (PCI_PRODUCT(pa->pa_id)) { 149 case PCI_PRODUCT_VIATECH_VT82C686A_SMB: 150 /* 151 * The VIA VT82C686A SMBus Controller itself as 152 * ISA bridge, but it's wrong ! 153 */ 154 return (0); 155 } 156 /* 157 * The Cyrix cs5530 PCI host bridge does not have a broken 158 * latch on the i8254 clock core, unlike its predecessors 159 * the cs5510 and cs5520. This reverses the setting from 160 * i386/i386/identcpu.c where it arguably should not have 161 * been set in the first place. XXX 162 */ 163 case PCI_VENDOR_CYRIX: 164 switch (PCI_PRODUCT(pa->pa_id)) { 165 case PCI_PRODUCT_CYRIX_CX5530_PCIB: 166 #if !defined(XEN) 167 { 168 extern int clock_broken_latch; 169 170 clock_broken_latch = 0; 171 } 172 #endif 173 return(1); 174 } 175 break; 176 } 177 178 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 179 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 180 return (1); 181 } 182 183 return (0); 184 } 185 186 void 187 pcibattach(device_t parent, device_t self, void *aux) 188 { 189 struct pcib_softc *sc = device_private(self); 190 struct pci_attach_args *pa = aux; 191 char devinfo[256]; 192 193 aprint_naive("\n"); 194 aprint_normal("\n"); 195 196 /* 197 * Just print out a description and defer configuration 198 * until all PCI devices have been attached. 199 */ 200 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 201 aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo, 202 PCI_REVISION(pa->pa_class)); 203 204 sc->sc_pc = pa->pa_pc; 205 sc->sc_tag = pa->pa_tag; 206 207 /* If a more specific pcib implementation has already registered a 208 * power handler, don't overwrite it. 209 */ 210 if (!device_pmf_is_registered(self)) { 211 if (!pmf_device_register(self, NULL, NULL)) 212 aprint_error_dev(self, "couldn't establish power handler\n"); 213 } 214 215 config_defer(self, pcib_callback); 216 } 217 218 int 219 pcibdetach(device_t self, int flags) 220 { 221 int rc; 222 223 if ((rc = config_detach_children(self, flags)) != 0) 224 return rc; 225 pmf_device_deregister(self); 226 return 0; 227 } 228 229 void 230 pcibchilddet(device_t self, device_t child) 231 { 232 /* we keep no references to children, so do nothing */ 233 } 234 235 void 236 pcib_callback(device_t self) 237 { 238 struct isabus_attach_args iba; 239 240 /* 241 * Attach the ISA bus behind this bridge. 242 */ 243 memset(&iba, 0, sizeof(iba)); 244 iba.iba_iot = X86_BUS_SPACE_IO; 245 iba.iba_memt = X86_BUS_SPACE_MEM; 246 #if NISA > 0 247 iba.iba_dmat = &isa_bus_dma_tag; 248 #endif 249 config_found_ia(self, "isabus", &iba, isabusprint); 250 } 251
Indexes created Fri Oct 03 02:09:57 GMT 2025