1 /*- 2 * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier 3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org> 4 * Copyright (c) 2000 BSDi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 /* 34 * PCI:ISA bridge support 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <machine/bus.h> 41 #include <machine/resource.h> 42 #include <sys/bus.h> 43 #include <sys/rman.h> 44 45 #include <pci/pcivar.h> 46 #include <pci/pcireg.h> 47 48 #define ELCR_IOADDR 0x4d0 /* Interrupt Edge/Level Control Registers */ 49 #define ELCR_IOLEN 2 50 51 struct isab_softc { 52 struct resource *elcr_res; 53 u_char saved_elcr[ELCR_IOLEN]; 54 }; 55 56 static int isab_probe(device_t dev); 57 static int isab_attach(device_t dev); 58 static int isab_detach(device_t dev); 59 static int isab_resume(device_t dev); 60 static int isab_suspend(device_t dev); 61 62 static device_method_t isab_methods[] = { 63 /* Device interface */ 64 DEVMETHOD(device_probe, isab_probe), 65 DEVMETHOD(device_attach, isab_attach), 66 DEVMETHOD(device_detach, isab_detach), 67 DEVMETHOD(device_shutdown, bus_generic_shutdown), 68 DEVMETHOD(device_suspend, isab_suspend), 69 DEVMETHOD(device_resume, isab_resume), 70 71 /* Bus interface */ 72 DEVMETHOD(bus_print_child, bus_generic_print_child), 73 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 74 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 75 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 76 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 77 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 78 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 79 80 { 0, 0 } 81 }; 82 83 static driver_t isab_driver = { 84 "isab", 85 isab_methods, 86 sizeof(struct isab_softc), 87 }; 88 89 static devclass_t isab_devclass; 90 91 DRIVER_MODULE(isab, pci, isab_driver, isab_devclass, 0, 0); 92 93 /* 94 * XXX we need to add a quirk list here for bridges that don't correctly 95 * report themselves. 96 */ 97 static int 98 isab_probe(device_t dev) 99 { 100 int matched = 0; 101 102 /* 103 * Try for a generic match based on class/subclass. 104 */ 105 if ((pci_get_class(dev) == PCIC_BRIDGE) && 106 (pci_get_subclass(dev) == PCIS_BRIDGE_ISA)) { 107 matched = 1; 108 } else { 109 /* 110 * These are devices that we *know* are PCI:ISA bridges. 111 * Sometimes, however, they don't report themselves as 112 * such. Check in case one of them is pretending to be 113 * something else. 114 */ 115 switch (pci_get_devid(dev)) { 116 case 0x04848086: /* Intel 82378ZB/82378IB */ 117 case 0x122e8086: /* Intel 82371FB */ 118 case 0x70008086: /* Intel 82371SB */ 119 case 0x71108086: /* Intel 82371AB */ 120 case 0x71988086: /* Intel 82443MX */ 121 case 0x24108086: /* Intel 82801AA (ICH) */ 122 case 0x24208086: /* Intel 82801AB (ICH0) */ 123 case 0x24408086: /* Intel 82801AB (ICH2) */ 124 case 0x00061004: /* VLSI 82C593 */ 125 case 0x05861106: /* VIA 82C586 */ 126 case 0x05961106: /* VIA 82C596 */ 127 case 0x06861106: /* VIA 82C686 */ 128 case 0x153310b9: /* AcerLabs M1533 */ 129 case 0x154310b9: /* AcerLabs M1543 */ 130 case 0x00081039: /* SiS 85c503 */ 131 case 0x00001078: /* Cyrix Cx5510 */ 132 case 0x01001078: /* Cyrix Cx5530 */ 133 case 0xc7001045: /* OPTi 82C700 (FireStar) */ 134 case 0x00011033: /* NEC 0001 (C-bus) */ 135 case 0x002c1033: /* NEC 002C (C-bus) */ 136 case 0x003b1033: /* NEC 003B (C-bus) */ 137 case 0x886a1060: /* UMC UM8886 ISA */ 138 case 0x02001166: /* ServerWorks IB6566 PCI */ 139 if (bootverbose) 140 printf("PCI-ISA bridge with incorrect subclass 0x%x\n", 141 pci_get_subclass(dev)); 142 matched = 1; 143 break; 144 145 default: 146 break; 147 } 148 } 149 150 if (matched) { 151 device_set_desc(dev, "PCI-ISA bridge"); 152 return(-10000); 153 } 154 return(ENXIO); 155 } 156 157 static int 158 isab_attach(device_t dev) 159 { 160 device_t child; 161 struct isab_softc *sc = device_get_softc(dev); 162 int error, rid; 163 164 /* 165 * Attach an ISA bus. Note that we can only have one ISA bus. 166 */ 167 child = device_add_child(dev, "isa", 0); 168 if (child != NULL) { 169 error = bus_generic_attach(dev); 170 if (error) 171 return (error); 172 } 173 174 switch (pci_get_devid(dev)) { 175 case 0x71108086: /* Intel 82371AB */ 176 /* 177 * Sometimes the ELCR (Edge/Level Control Register) is not restored 178 * correctly on resume by the BIOS, so we handle it ourselves. 179 */ 180 rid = 0; 181 bus_set_resource(dev, SYS_RES_IOPORT, rid, ELCR_IOADDR, ELCR_IOLEN); 182 sc->elcr_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, 183 RF_ACTIVE); 184 if (sc->elcr_res == NULL) 185 device_printf(dev, "failed to allocate ELCR resource\n"); 186 break; 187 } 188 189 return(0); 190 } 191 192 static int 193 isab_detach(device_t dev) 194 { 195 struct isab_softc *sc = device_get_softc(dev); 196 197 if (sc->elcr_res != NULL) 198 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->elcr_res); 199 200 return (bus_generic_detach(dev)); 201 } 202 203 static int 204 isab_suspend(device_t dev) 205 { 206 struct isab_softc *sc = device_get_softc(dev); 207 bus_space_tag_t bst; 208 bus_space_handle_t bsh; 209 int i; 210 211 /* Save the ELCR if required. */ 212 if (sc->elcr_res != NULL) { 213 bst = rman_get_bustag(sc->elcr_res); 214 bsh = rman_get_bushandle(sc->elcr_res); 215 for (i = 0; i < ELCR_IOLEN; i++) 216 sc->saved_elcr[i] = bus_space_read_1(bst, bsh, i); 217 } 218 219 return (bus_generic_suspend(dev)); 220 } 221 222 static int 223 isab_resume(device_t dev) 224 { 225 struct isab_softc *sc = device_get_softc(dev); 226 bus_space_tag_t bst; 227 bus_space_handle_t bsh; 228 int i; 229 230 /* Restore the ELCR if required. */ 231 if (sc->elcr_res != NULL) { 232 bst = rman_get_bustag(sc->elcr_res); 233 bsh = rman_get_bushandle(sc->elcr_res); 234 for (i = 0; i < ELCR_IOLEN; i++) 235 bus_space_write_1(bst, bsh, i, sc->saved_elcr[i]); 236 } 237 238 return (bus_generic_resume(dev)); 239 } 240