1 /* $OpenBSD: pcib.c,v 1.23 2010/07/08 20:17:54 deraadt Exp $ */ 2 /* $NetBSD: pcib.c,v 1.6 1997/06/06 23:29:16 thorpej Exp $ */ 3 4 /*- 5 * Copyright (c) 1996 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 37 #include <machine/bus.h> 38 #include <dev/isa/isavar.h> 39 40 #include <dev/pci/pcivar.h> 41 #include <dev/pci/pcireg.h> 42 43 #include <dev/pci/pcidevs.h> 44 45 #include "isa.h" 46 #include "pcibios.h" 47 #if NPCIBIOS > 0 48 #include <i386/pci/pcibiosvar.h> 49 #endif 50 51 int pcibmatch(struct device *, void *, void *); 52 void pcibattach(struct device *, struct device *, void *); 53 void pcib_callback(struct device *); 54 int pcib_print(void *, const char *); 55 56 struct cfattach pcib_ca = { 57 sizeof(struct device), pcibmatch, pcibattach, NULL, 58 config_activate_children 59 }; 60 61 struct cfdriver pcib_cd = { 62 NULL, "pcib", DV_DULL 63 }; 64 65 int 66 pcibmatch(struct device *parent, void *match, void *aux) 67 { 68 struct pci_attach_args *pa = aux; 69 70 switch (PCI_VENDOR(pa->pa_id)) { 71 case PCI_VENDOR_INTEL: 72 switch (PCI_PRODUCT(pa->pa_id)) { 73 case PCI_PRODUCT_INTEL_SIO: 74 case PCI_PRODUCT_INTEL_82371MX: 75 case PCI_PRODUCT_INTEL_82371AB_ISA: 76 case PCI_PRODUCT_INTEL_82440MX_ISA: 77 /* The above bridges mis-identify themselves */ 78 return (1); 79 } 80 break; 81 case PCI_VENDOR_SIS: 82 switch (PCI_PRODUCT(pa->pa_id)) { 83 case PCI_PRODUCT_SIS_85C503: 84 /* mis-identifies itself as a miscellaneous prehistoric */ 85 return (1); 86 } 87 break; 88 case PCI_VENDOR_VIATECH: 89 switch (PCI_PRODUCT(pa->pa_id)) { 90 case PCI_PRODUCT_VIATECH_VT82C686A_SMB: 91 /* mis-identifies itself as a ISA bridge */ 92 return (0); 93 } 94 break; 95 } 96 97 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 98 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) 99 return (1); 100 101 return (0); 102 } 103 104 void 105 pcibattach(struct device *parent, struct device *self, void *aux) 106 { 107 /* 108 * Cannot attach isa bus now; must postpone for various reasons 109 */ 110 printf("\n"); 111 112 config_defer(self, pcib_callback); 113 } 114 115 void 116 pcib_callback(struct device *self) 117 { 118 struct isabus_attach_args iba; 119 120 #if NPCIBIOS > 0 121 pci_intr_post_fixup(); 122 #endif 123 124 /* 125 * Attach the ISA bus behind this bridge. 126 */ 127 memset(&iba, 0, sizeof(iba)); 128 iba.iba_busname = "isa"; 129 iba.iba_iot = I386_BUS_SPACE_IO; 130 iba.iba_memt = I386_BUS_SPACE_MEM; 131 #if NISADMA > 0 132 iba.iba_dmat = &isa_bus_dma_tag; 133 #endif 134 config_found(self, &iba, pcib_print); 135 } 136 137 int 138 pcib_print(void *aux, const char *pnp) 139 { 140 /* Only ISAs can attach to pcib's; easy. */ 141 if (pnp) 142 printf("isa at %s", pnp); 143 return (UNCONF); 144 } 145