1 /* $NetBSD: pcib.c,v 1.1 2011/08/27 13:42:46 bouyer 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 1.1 2011/08/27 13:42:46 bouyer Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 39 40 #include <evbmips/loongson/autoconf.h> 41 42 #include <dev/pci/pcireg.h> 43 #include <dev/pci/pcivar.h> 44 #include <dev/pci/pcidevs.h> 45 46 #include <dev/isa/isavar.h> 47 48 #include <evbmips/loongson/loongson_bus_defs.h> 49 #include <evbmips/loongson/dev/pcibvar.h> 50 51 #include "isa.h" 52 53 int pcibmatch(device_t, cfdata_t, void *); 54 void pcib_callback(device_t); 55 56 CFATTACH_DECL3_NEW(pcib, sizeof(struct pcib_softc), 57 pcibmatch, pcibattach, pcibdetach, NULL, pcibrescan, pcibchilddet, 58 DVF_DETACH_SHUTDOWN); 59 60 61 int 62 pcibmatch(device_t parent, cfdata_t match, void *aux) 63 { 64 struct pci_attach_args *pa = aux; 65 66 switch (PCI_VENDOR(pa->pa_id)) { 67 case PCI_VENDOR_INTEL: 68 switch (PCI_PRODUCT(pa->pa_id)) { 69 case PCI_PRODUCT_INTEL_SIO: 70 case PCI_PRODUCT_INTEL_82371MX: 71 case PCI_PRODUCT_INTEL_82371AB_ISA: 72 case PCI_PRODUCT_INTEL_82440MX_ISA: 73 /* The above bridges mis-identify themselves */ 74 return (1); 75 } 76 break; 77 case PCI_VENDOR_SIS: 78 switch (PCI_PRODUCT(pa->pa_id)) { 79 case PCI_PRODUCT_SIS_85C503: 80 /* mis-identifies itself as a miscellaneous prehistoric */ 81 return (1); 82 } 83 break; 84 case PCI_VENDOR_VIATECH: 85 switch (PCI_PRODUCT(pa->pa_id)) { 86 case PCI_PRODUCT_VIATECH_VT82C686A_SMB: 87 /* mis-identifies itself as a ISA bridge */ 88 return (0); 89 } 90 break; 91 } 92 93 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 94 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) 95 return (1); 96 97 return (0); 98 } 99 100 void 101 pcibattach(device_t parent, device_t self, void *aux) 102 { 103 struct pcib_softc *sc = device_private(self); 104 struct pci_attach_args *pa = (struct pci_attach_args *)aux; 105 char devinfo[256]; 106 107 aprint_naive("\n"); 108 109 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 110 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, 111 PCI_REVISION(pa->pa_class)); 112 113 /* 114 * Wait until all PCI devices are attached before attaching isa; 115 * otherwise this might mess the interrupt setup on some systems. 116 */ 117 sc->sc_pc = pa->pa_pc; 118 sc->sc_tag = pa->pa_tag; 119 120 if (!pmf_device_register(self, NULL, NULL)) 121 aprint_error_dev(self, "couldn't establish power handler\n"); 122 config_defer(self, pcib_callback); 123 } 124 125 int 126 pcibdetach(device_t self, int flags) 127 { 128 int rc; 129 130 if ((rc = config_detach_children(self, flags)) != 0) 131 return rc; 132 pmf_device_deregister(self); 133 return 0; 134 } 135 136 void 137 pcibchilddet(device_t self, device_t child) 138 { 139 struct pcib_softc *sc = device_private(self); 140 141 if (sc->sc_isabus == child) 142 sc->sc_isabus = NULL; 143 } 144 145 int 146 pcibrescan(device_t self, const char *ifattr, const int *loc) 147 { 148 struct pcib_softc *sc = device_private(self); 149 struct isabus_attach_args iba; 150 151 if (ifattr_match(ifattr, "isabus") && sc->sc_isabus == NULL) { 152 /* 153 * Attach the ISA bus behind this bridge. 154 */ 155 memset(&iba, 0, sizeof(iba)); 156 iba.iba_iot = &bonito_iot; 157 iba.iba_memt = &bonito_memt; 158 #if NISA > 0 159 iba.iba_dmat = &bonito_dmat; 160 #endif 161 iba.iba_ic = sys_platform->isa_chipset; 162 163 if (iba.iba_ic != NULL) 164 sc->sc_isabus = 165 config_found_ia(self, "isabus", &iba, isabusprint); 166 } 167 return 0; 168 } 169 170 171 void 172 pcib_callback(device_t self) 173 { 174 pcibrescan(self, "isabus", NULL); 175 } 176