1 /* $OpenBSD: pcib.c,v 1.7 2022/02/21 11:03:39 mpi 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 47 int pcibmatch(struct device *, void *, void *); 48 void pcibattach(struct device *, struct device *, void *); 49 void pcib_callback(struct device *); 50 int pcib_print(void *, const char *); 51 52 const struct cfattach pcib_ca = { 53 sizeof(struct device), pcibmatch, pcibattach 54 }; 55 56 struct cfdriver pcib_cd = { 57 NULL, "pcib", DV_DULL 58 }; 59 60 int 61 pcibmatch(struct device *parent, void *match, void *aux) 62 { 63 struct pci_attach_args *pa = aux; 64 65 switch (PCI_VENDOR(pa->pa_id)) { 66 case PCI_VENDOR_INTEL: 67 switch (PCI_PRODUCT(pa->pa_id)) { 68 case PCI_PRODUCT_INTEL_SIO: 69 case PCI_PRODUCT_INTEL_82371MX: 70 case PCI_PRODUCT_INTEL_82371AB_ISA: 71 case PCI_PRODUCT_INTEL_82440MX_ISA: 72 /* The above bridges mis-identify themselves */ 73 return (1); 74 } 75 break; 76 case PCI_VENDOR_SIS: 77 switch (PCI_PRODUCT(pa->pa_id)) { 78 case PCI_PRODUCT_SIS_85C503: 79 /* mis-identifies itself as a miscellaneous prehistoric */ 80 return (1); 81 } 82 break; 83 case PCI_VENDOR_VIATECH: 84 switch (PCI_PRODUCT(pa->pa_id)) { 85 case PCI_PRODUCT_VIATECH_VT82C686A_SMB: 86 /* mis-identifies itself as a ISA bridge */ 87 return (0); 88 } 89 break; 90 } 91 92 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 93 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) 94 return (1); 95 96 return (0); 97 } 98 99 void 100 pcibattach(struct device *parent, struct device *self, void *aux) 101 { 102 /* 103 * Cannot attach isa bus now; must postpone for various reasons 104 */ 105 printf("\n"); 106 107 config_defer(self, pcib_callback); 108 } 109 110 void 111 pcib_callback(struct device *self) 112 { 113 struct isabus_attach_args iba; 114 115 /* 116 * Attach the ISA bus behind this bridge. 117 */ 118 memset(&iba, 0, sizeof(iba)); 119 iba.iba_busname = "isa"; 120 iba.iba_iot = X86_BUS_SPACE_IO; 121 iba.iba_memt = X86_BUS_SPACE_MEM; 122 #if NISADMA > 0 123 iba.iba_dmat = &isa_bus_dma_tag; 124 #endif 125 config_found(self, &iba, pcib_print); 126 } 127 128 int 129 pcib_print(void *aux, const char *pnp) 130 { 131 /* Only ISAs can attach to pcib's; easy. */ 132 if (pnp) 133 printf("isa at %s", pnp); 134 return (UNCONF); 135 } 136