pcib.c revision 1.2.6.1
1 /* $NetBSD: pcib.c,v 1.2.6.1 2008/03/24 07:15:09 keiichi 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 1.2.6.1 2008/03/24 07:15:09 keiichi 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(device_t, struct cfdata *, void *); 64 void pcibattach(device_t, device_t, void *); 65 int pcibdetach(device_t, int); 66 void pcibchilddet(device_t, device_t); 67 68 CFATTACH_DECL2_NEW(pcib, sizeof(struct pcib_softc), 69 pcibmatch, pcibattach, pcibdetach, NULL, NULL, pcibchilddet); 70 71 void pcib_callback(device_t); 72 73 int 74 pcibmatch(device_t parent, struct cfdata *match, void *aux) 75 { 76 struct pci_attach_args *pa = aux; 77 78 #if 0 79 /* 80 * PCI-ISA bridges are matched on class/subclass. 81 * This list contains only the bridges where correct 82 * (or incorrect) behaviour is not yet confirmed. 83 */ 84 switch (PCI_VENDOR(pa->pa_id)) { 85 case PCI_VENDOR_INTEL: 86 switch (PCI_PRODUCT(pa->pa_id)) { 87 case PCI_PRODUCT_INTEL_82426EX: 88 case PCI_PRODUCT_INTEL_82380AB: 89 return (1); 90 } 91 break; 92 93 case PCI_VENDOR_UMC: 94 switch (PCI_PRODUCT(pa->pa_id)) { 95 case PCI_PRODUCT_UMC_UM8886F: 96 case PCI_PRODUCT_UMC_UM82C886: 97 return (1); 98 } 99 break; 100 case PCI_VENDOR_ALI: 101 switch (PCI_PRODUCT(pa->pa_id)) { 102 case PCI_PRODUCT_ALI_M1449: 103 case PCI_PRODUCT_ALI_M1543: 104 return (1); 105 } 106 break; 107 case PCI_VENDOR_COMPAQ: 108 switch (PCI_PRODUCT(pa->pa_id)) { 109 case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE: 110 return (1); 111 } 112 break; 113 case PCI_VENDOR_VIATECH: 114 switch (PCI_PRODUCT(pa->pa_id)) { 115 case PCI_PRODUCT_VIATECH_VT82C570MV: 116 case PCI_PRODUCT_VIATECH_VT82C586_ISA: 117 return (1); 118 } 119 break; 120 } 121 #endif 122 123 /* 124 * some special cases: 125 */ 126 switch (PCI_VENDOR(pa->pa_id)) { 127 case PCI_VENDOR_INTEL: 128 switch (PCI_PRODUCT(pa->pa_id)) { 129 case PCI_PRODUCT_INTEL_SIO: 130 /* 131 * The Intel SIO identifies itself as a 132 * miscellaneous prehistoric. 133 */ 134 case PCI_PRODUCT_INTEL_82371MX: 135 /* 136 * The Intel 82371MX identifies itself erroneously as a 137 * miscellaneous bridge. 138 */ 139 case PCI_PRODUCT_INTEL_82371AB_ISA: 140 /* 141 * Some Intel 82371AB PCI-ISA bridge identifies 142 * itself as miscellaneous bridge. 143 */ 144 return (1); 145 } 146 break; 147 case PCI_VENDOR_SIS: 148 switch (PCI_PRODUCT(pa->pa_id)) { 149 case PCI_PRODUCT_SIS_85C503: 150 /* 151 * The SIS 85C503 identifies itself as a 152 * miscellaneous prehistoric. 153 */ 154 return (1); 155 } 156 break; 157 case PCI_VENDOR_VIATECH: 158 switch (PCI_PRODUCT(pa->pa_id)) { 159 case PCI_PRODUCT_VIATECH_VT82C686A_SMB: 160 /* 161 * The VIA VT82C686A SMBus Controller itself as 162 * ISA bridge, but it's wrong ! 163 */ 164 return (0); 165 } 166 /* 167 * The Cyrix cs5530 PCI host bridge does not have a broken 168 * latch on the i8254 clock core, unlike its predecessors 169 * the cs5510 and cs5520. This reverses the setting from 170 * i386/i386/identcpu.c where it arguably should not have 171 * been set in the first place. XXX 172 */ 173 case PCI_VENDOR_CYRIX: 174 switch (PCI_PRODUCT(pa->pa_id)) { 175 case PCI_PRODUCT_CYRIX_CX5530_PCIB: 176 { 177 extern int clock_broken_latch; 178 179 clock_broken_latch = 0; 180 } 181 return(1); 182 } 183 break; 184 } 185 186 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 187 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 188 return (1); 189 } 190 191 return (0); 192 } 193 194 void 195 pcibattach(device_t parent, device_t self, void *aux) 196 { 197 struct pcib_softc *sc = device_private(self); 198 struct pci_attach_args *pa = aux; 199 char devinfo[256]; 200 201 aprint_naive("\n"); 202 aprint_normal("\n"); 203 204 /* 205 * Just print out a description and defer configuration 206 * until all PCI devices have been attached. 207 */ 208 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 209 aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo, 210 PCI_REVISION(pa->pa_class)); 211 212 sc->sc_pc = pa->pa_pc; 213 sc->sc_tag = pa->pa_tag; 214 215 /* If a more specific pcib implementation has already registered a 216 * power handler, don't overwrite it. 217 */ 218 if (!device_pmf_is_registered(self)) { 219 if (!pmf_device_register(self, NULL, NULL)) 220 aprint_error_dev(self, "couldn't establish power handler\n"); 221 } 222 223 config_defer(self, pcib_callback); 224 } 225 226 int 227 pcibdetach(device_t self, int flags) 228 { 229 int rc; 230 231 if ((rc = config_detach_children(self, flags)) != 0) 232 return rc; 233 pmf_device_deregister(self); 234 return 0; 235 } 236 237 void 238 pcibchilddet(device_t self, device_t child) 239 { 240 /* we keep no references to children, so do nothing */ 241 } 242 243 void 244 pcib_callback(device_t self) 245 { 246 struct isabus_attach_args iba; 247 248 /* 249 * Attach the ISA bus behind this bridge. 250 */ 251 memset(&iba, 0, sizeof(iba)); 252 iba.iba_iot = X86_BUS_SPACE_IO; 253 iba.iba_memt = X86_BUS_SPACE_MEM; 254 #if NISA > 0 255 iba.iba_dmat = &isa_bus_dma_tag; 256 #endif 257 config_found_ia(self, "isabus", &iba, isabusprint); 258 } 259
Indexes created Fri Oct 03 02:09:57 GMT 2025