| 1 | /* $NetBSD: pcib.c,v 1.15 2012/04/06 20:38:52 plunky 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 1.15 2012/04/06 20:38:52 plunky Exp $" ); |
| 34 | |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/param.h> |
| 37 | #include <sys/systm.h> |
| 38 | #include <sys/device.h> |
| 39 | |
| 40 | #include <sys/bus.h> |
| 41 | |
| 42 | #include <dev/isa/isavar.h> |
| 43 | |
| 44 | #include <dev/pci/pcivar.h> |
| 45 | #include <dev/pci/pcireg.h> |
| 46 | |
| 47 | #include <dev/pci/pcidevs.h> |
| 48 | |
| 49 | #include "isa.h" |
| 50 | #include "pcibvar.h" |
| 51 | |
| 52 | int pcibmatch(device_t, cfdata_t, void *); |
| 53 | |
| 54 | CFATTACH_DECL3_NEW(pcib, sizeof(struct pcib_softc), |
| 55 | pcibmatch, pcibattach, pcibdetach, NULL, pcibrescan, pcibchilddet, |
| 56 | DVF_DETACH_SHUTDOWN); |
| 57 | |
| 58 | void pcib_callback(device_t); |
| 59 | |
| 60 | int |
| 61 | pcibmatch(device_t parent, cfdata_t match, void *aux) |
| 62 | { |
| 63 | struct pci_attach_args *pa = aux; |
| 64 | |
| 65 | #if 0 |
| 66 | /* |
| 67 | * PCI-ISA bridges are matched on class/subclass. |
| 68 | * This list contains only the bridges where correct |
| 69 | * (or incorrect) behaviour is not yet confirmed. |
| 70 | */ |
| 71 | switch (PCI_VENDOR(pa->pa_id)) { |
| 72 | case PCI_VENDOR_INTEL: |
| 73 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 74 | case PCI_PRODUCT_INTEL_82426EX: |
| 75 | case PCI_PRODUCT_INTEL_82380AB: |
| 76 | return (1); |
| 77 | } |
| 78 | break; |
| 79 | |
| 80 | case PCI_VENDOR_UMC: |
| 81 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 82 | case PCI_PRODUCT_UMC_UM8886F: |
| 83 | case PCI_PRODUCT_UMC_UM82C886: |
| 84 | return (1); |
| 85 | } |
| 86 | break; |
| 87 | case PCI_VENDOR_ALI: |
| 88 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 89 | case PCI_PRODUCT_ALI_M1449: |
| 90 | case PCI_PRODUCT_ALI_M1543: |
| 91 | return (1); |
| 92 | } |
| 93 | break; |
| 94 | case PCI_VENDOR_COMPAQ: |
| 95 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 96 | case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE: |
| 97 | return (1); |
| 98 | } |
| 99 | break; |
| 100 | case PCI_VENDOR_VIATECH: |
| 101 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 102 | case PCI_PRODUCT_VIATECH_VT82C570MV: |
| 103 | case PCI_PRODUCT_VIATECH_VT82C586_ISA: |
| 104 | return (1); |
| 105 | } |
| 106 | break; |
| 107 | } |
| 108 | #endif |
| 109 | |
| 110 | /* |
| 111 | * some special cases: |
| 112 | */ |
| 113 | switch (PCI_VENDOR(pa->pa_id)) { |
| 114 | case PCI_VENDOR_INTEL: |
| 115 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 116 | case PCI_PRODUCT_INTEL_SIO: |
| 117 | /* |
| 118 | * The Intel SIO identifies itself as a |
| 119 | * miscellaneous prehistoric. |
| 120 | */ |
| 121 | case PCI_PRODUCT_INTEL_82371MX: |
| 122 | /* |
| 123 | * The Intel 82371MX identifies itself erroneously as a |
| 124 | * miscellaneous bridge. |
| 125 | */ |
| 126 | case PCI_PRODUCT_INTEL_82371AB_ISA: |
| 127 | /* |
| 128 | * Some Intel 82371AB PCI-ISA bridge identifies |
| 129 | * itself as miscellaneous bridge. |
| 130 | */ |
| 131 | return (1); |
| 132 | } |
| 133 | break; |
| 134 | case PCI_VENDOR_SIS: |
| 135 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 136 | case PCI_PRODUCT_SIS_85C503: |
| 137 | /* |
| 138 | * The SIS 85C503 identifies itself as a |
| 139 | * miscellaneous prehistoric. |
| 140 | */ |
| 141 | return (1); |
| 142 | } |
| 143 | break; |
| 144 | case PCI_VENDOR_VIATECH: |
| 145 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 146 | case PCI_PRODUCT_VIATECH_VT82C686A_SMB: |
| 147 | /* |
| 148 | * The VIA VT82C686A SMBus Controller itself as |
| 149 | * ISA bridge, but it's wrong ! |
| 150 | */ |
| 151 | return (0); |
| 152 | } |
| 153 | /* |
| 154 | * The Cyrix cs5530 PCI host bridge does not have a broken |
| 155 | * latch on the i8254 clock core, unlike its predecessors |
| 156 | * the cs5510 and cs5520. This reverses the setting from |
| 157 | * i386/i386/identcpu.c where it arguably should not have |
| 158 | * been set in the first place. XXX |
| 159 | */ |
| 160 | case PCI_VENDOR_CYRIX: |
| 161 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 162 | case PCI_PRODUCT_CYRIX_CX5530_PCIB: |
| 163 | #if !defined(XEN) |
| 164 | { |
| 165 | extern int clock_broken_latch; |
| 166 | |
| 167 | clock_broken_latch = 0; |
| 168 | } |
| 169 | #endif |
| 170 | return(1); |
| 171 | } |
| 172 | break; |
| 173 | } |
| 174 | |
| 175 | if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && |
| 176 | PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { |
| 177 | return (1); |
| 178 | } |
| 179 | |
| 180 | return (0); |
| 181 | } |
| 182 | |
| 183 | void |
| 184 | pcibattach(device_t parent, device_t self, void *aux) |
| 185 | { |
| 186 | struct pcib_softc *sc = device_private(self); |
| 187 | struct pci_attach_args *pa = aux; |
| 188 | |
| 189 | /* |
| 190 | * Just print out a description and defer configuration |
| 191 | * until all PCI devices have been attached. |
| 192 | */ |
| 193 | pci_aprint_devinfo(pa, NULL); |
| 194 | |
| 195 | sc->sc_pc = pa->pa_pc; |
| 196 | sc->sc_tag = pa->pa_tag; |
| 197 | |
| 198 | if (!pmf_device_register(self, NULL, NULL)) |
| 199 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
| 200 | |
| 201 | config_defer(self, pcib_callback); |
| 202 | } |
| 203 | |
| 204 | int |
| 205 | pcibdetach(device_t self, int flags) |
| 206 | { |
| 207 | int rc; |
| 208 | |
| 209 | if ((rc = config_detach_children(self, flags)) != 0) |
| 210 | return rc; |
| 211 | pmf_device_deregister(self); |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | void |
| 216 | pcibchilddet(device_t self, device_t child) |
| 217 | { |
| 218 | struct pcib_softc *sc = device_private(self); |
| 219 | |
| 220 | if (sc->sc_isabus == child) |
| 221 | sc->sc_isabus = NULL; |
| 222 | } |
| 223 | |
| 224 | int |
| 225 | pcibrescan(device_t self, const char *ifattr, const int *loc) |
| 226 | { |
| 227 | struct pcib_softc *sc = device_private(self); |
| 228 | struct isabus_attach_args iba; |
| 229 | |
| 230 | if (ifattr_match(ifattr, "isabus" ) && sc->sc_isabus == NULL) { |
| 231 | /* |
| 232 | * Attach the ISA bus behind this bridge. |
| 233 | */ |
| 234 | memset(&iba, 0, sizeof(iba)); |
| 235 | iba.iba_iot = x86_bus_space_io; |
| 236 | iba.iba_memt = x86_bus_space_mem; |
| 237 | #if NISA > 0 |
| 238 | iba.iba_dmat = &isa_bus_dma_tag; |
| 239 | #endif |
| 240 | sc->sc_isabus = |
| 241 | config_found_ia(self, "isabus" , &iba, isabusprint); |
| 242 | } |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | void |
| 247 | pcib_callback(device_t self) |
| 248 | { |
| 249 | pcibrescan(self, "isabus" , NULL); |
| 250 | } |
| 251 | |