pcib.c revision 1.1.4.3
1 /* $NetBSD: pcib.c,v 1.1.4.3 2007/11/06 14:27:10 joerg 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 1.1.4.3 2007/11/06 14:27:10 joerg 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 struct pci_conf_state sc_pciconf; 62 }; 63 64 int pcibmatch(struct device *, struct cfdata *, void *); 65 void pcibattach(struct device *, struct device *, void *); 66 67 CFATTACH_DECL_NEW(pcib, sizeof(struct pcib_softc), 68 pcibmatch, pcibattach, NULL, NULL); 69 70 void pcib_callback(struct device *); 71 72 int 73 pcibmatch(struct device *parent, struct cfdata *match, void *aux) 74 { 75 struct pci_attach_args *pa = aux; 76 77 #if 0 78 /* 79 * PCI-ISA bridges are matched on class/subclass. 80 * This list contains only the bridges where correct 81 * (or incorrect) behaviour is not yet confirmed. 82 */ 83 switch (PCI_VENDOR(pa->pa_id)) { 84 case PCI_VENDOR_INTEL: 85 switch (PCI_PRODUCT(pa->pa_id)) { 86 case PCI_PRODUCT_INTEL_82426EX: 87 case PCI_PRODUCT_INTEL_82380AB: 88 return (1); 89 } 90 break; 91 92 case PCI_VENDOR_UMC: 93 switch (PCI_PRODUCT(pa->pa_id)) { 94 case PCI_PRODUCT_UMC_UM8886F: 95 case PCI_PRODUCT_UMC_UM82C886: 96 return (1); 97 } 98 break; 99 case PCI_VENDOR_ALI: 100 switch (PCI_PRODUCT(pa->pa_id)) { 101 case PCI_PRODUCT_ALI_M1449: 102 case PCI_PRODUCT_ALI_M1543: 103 return (1); 104 } 105 break; 106 case PCI_VENDOR_COMPAQ: 107 switch (PCI_PRODUCT(pa->pa_id)) { 108 case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE: 109 return (1); 110 } 111 break; 112 case PCI_VENDOR_VIATECH: 113 switch (PCI_PRODUCT(pa->pa_id)) { 114 case PCI_PRODUCT_VIATECH_VT82C570MV: 115 case PCI_PRODUCT_VIATECH_VT82C586_ISA: 116 return (1); 117 } 118 break; 119 } 120 #endif 121 122 /* 123 * some special cases: 124 */ 125 switch (PCI_VENDOR(pa->pa_id)) { 126 case PCI_VENDOR_INTEL: 127 switch (PCI_PRODUCT(pa->pa_id)) { 128 case PCI_PRODUCT_INTEL_SIO: 129 /* 130 * The Intel SIO identifies itself as a 131 * miscellaneous prehistoric. 132 */ 133 case PCI_PRODUCT_INTEL_82371MX: 134 /* 135 * The Intel 82371MX identifies itself erroneously as a 136 * miscellaneous bridge. 137 */ 138 case PCI_PRODUCT_INTEL_82371AB_ISA: 139 /* 140 * Some Intel 82371AB PCI-ISA bridge identifies 141 * itself as miscellaneous bridge. 142 */ 143 return (1); 144 } 145 break; 146 case PCI_VENDOR_SIS: 147 switch (PCI_PRODUCT(pa->pa_id)) { 148 case PCI_PRODUCT_SIS_85C503: 149 /* 150 * The SIS 85C503 identifies itself as a 151 * miscellaneous prehistoric. 152 */ 153 return (1); 154 } 155 break; 156 case PCI_VENDOR_VIATECH: 157 switch (PCI_PRODUCT(pa->pa_id)) { 158 case PCI_PRODUCT_VIATECH_VT82C686A_SMB: 159 /* 160 * The VIA VT82C686A SMBus Controller itself as 161 * ISA bridge, but it's wrong ! 162 */ 163 return (0); 164 } 165 /* 166 * The Cyrix cs5530 PCI host bridge does not have a broken 167 * latch on the i8254 clock core, unlike its predecessors 168 * the cs5510 and cs5520. This reverses the setting from 169 * i386/i386/identcpu.c where it arguably should not have 170 * been set in the first place. XXX 171 */ 172 case PCI_VENDOR_CYRIX: 173 switch (PCI_PRODUCT(pa->pa_id)) { 174 case PCI_PRODUCT_CYRIX_CX5530_PCIB: 175 { 176 extern int clock_broken_latch; 177 178 clock_broken_latch = 0; 179 } 180 return(1); 181 } 182 break; 183 } 184 185 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 186 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 187 return (1); 188 } 189 190 return (0); 191 } 192 193 void 194 pcibattach(struct device *parent, struct device *self, void *aux) 195 { 196 struct pcib_softc *sc = device_private(self); 197 struct pci_attach_args *pa = aux; 198 char devinfo[256]; 199 200 aprint_naive("\n"); 201 aprint_normal("\n"); 202 203 /* 204 * Just print out a description and defer configuration 205 * until all PCI devices have been attached. 206 */ 207 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 208 aprint_normal("%s: %s (rev. 0x%02x)\n", self->dv_xname, devinfo, 209 PCI_REVISION(pa->pa_class)); 210 211 sc->sc_pc = pa->pa_pc; 212 sc->sc_tag = pa->pa_tag; 213 214 /* If a more specific pcib implementation has already registered a 215 * power handler, don't overwrite it. 216 */ 217 if (!device_pnp_is_registered(self)) { 218 if (!pnp_device_register(self, NULL, NULL)) 219 aprint_error_dev(self, "couldn't establish power handler\n"); 220 } 221 222 config_defer(self, pcib_callback); 223 } 224 225 void 226 pcib_callback(struct device *self) 227 { 228 struct isabus_attach_args iba; 229 230 /* 231 * Attach the ISA bus behind this bridge. 232 */ 233 memset(&iba, 0, sizeof(iba)); 234 iba.iba_iot = X86_BUS_SPACE_IO; 235 iba.iba_memt = X86_BUS_SPACE_MEM; 236 #if NISA > 0 237 iba.iba_dmat = &isa_bus_dma_tag; 238 #endif 239 config_found_ia(self, "isabus", &iba, isabusprint); 240 } 241
Indexes created Fri Oct 03 02:09:57 GMT 2025