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 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 /* 35 * PCI:ISA bridge support 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 #include <sys/bus.h> 45 #include <sys/rman.h> 46 47 #include <isa/isavar.h> 48 #include <dev/pci/pcivar.h> 49 #include <dev/pci/pcireg.h> 50 51 #define ELCR_IOADDR 0x4d0 /* Interrupt Edge/Level Control Registers */ 52 #define ELCR_IOLEN 2 53 54 struct isab_softc { 55 struct resource *elcr_res; 56 u_char saved_elcr[ELCR_IOLEN]; 57 }; 58 59 static int isab_probe(device_t dev); 60 static int pci_isab_attach(device_t dev); 61 static int isab_detach(device_t dev); 62 static int isab_resume(device_t dev); 63 static int isab_suspend(device_t dev); 64 65 static device_method_t isab_methods[] = { 66 /* Device interface */ 67 DEVMETHOD(device_probe, isab_probe), 68 DEVMETHOD(device_attach, pci_isab_attach), 69 DEVMETHOD(device_detach, isab_detach), 70 DEVMETHOD(device_shutdown, bus_generic_shutdown), 71 DEVMETHOD(device_suspend, isab_suspend), 72 DEVMETHOD(device_resume, isab_resume), 73 74 /* Bus interface */ 75 DEVMETHOD(bus_print_child, bus_generic_print_child), 76 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 77 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 78 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 79 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 80 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 81 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 82 83 { 0, 0 } 84 }; 85 86 static driver_t isab_driver = { 87 "isab", 88 isab_methods, 89 sizeof(struct isab_softc), 90 }; 91 92 DRIVER_MODULE(isab, pci, isab_driver, isab_devclass, 0, 0); 93 94 /* 95 * XXX we need to add a quirk list here for bridges that don't correctly 96 * report themselves. 97 */ 98 static int 99 isab_probe(device_t dev) 100 { 101 int matched = 0; 102 103 /* 104 * Try for a generic match based on class/subclass. 105 */ 106 if ((pci_get_class(dev) == PCIC_BRIDGE) && 107 (pci_get_subclass(dev) == PCIS_BRIDGE_ISA)) { 108 matched = 1; 109 } else { 110 /* 111 * These are devices that we *know* are PCI:ISA bridges. 112 * Sometimes, however, they don't report themselves as 113 * such. Check in case one of them is pretending to be 114 * something else. 115 */ 116 switch (pci_get_devid(dev)) { 117 case 0x04848086: /* Intel 82378ZB/82378IB */ 118 case 0x122e8086: /* Intel 82371FB */ 119 case 0x70008086: /* Intel 82371SB */ 120 case 0x71108086: /* Intel 82371AB */ 121 case 0x71988086: /* Intel 82443MX */ 122 case 0x24108086: /* Intel 82801AA (ICH) */ 123 case 0x24208086: /* Intel 82801AB (ICH0) */ 124 case 0x24408086: /* Intel 82801AB (ICH2) */ 125 case 0x00061004: /* VLSI 82C593 */ 126 case 0x05861106: /* VIA 82C586 */ 127 case 0x05961106: /* VIA 82C596 */ 128 case 0x06861106: /* VIA 82C686 */ 129 case 0x153310b9: /* AcerLabs M1533 */ 130 case 0x154310b9: /* AcerLabs M1543 */ 131 case 0x00081039: /* SiS 85c503 */ 132 case 0x00001078: /* Cyrix Cx5510 */ 133 case 0x01001078: /* Cyrix Cx5530 */ 134 case 0xc7001045: /* OPTi 82C700 (FireStar) */ 135 case 0x00011033: /* NEC 0001 (C-bus) */ 136 case 0x002c1033: /* NEC 002C (C-bus) */ 137 case 0x003b1033: /* NEC 003B (C-bus) */ 138 case 0x886a1060: /* UMC UM8886 ISA */ 139 case 0x02001166: /* ServerWorks IB6566 PCI */ 140 if (bootverbose) 141 printf("PCI-ISA bridge with incorrect subclass 0x%x\n", 142 pci_get_subclass(dev)); 143 matched = 1; 144 break; 145 146 default: 147 break; 148 } 149 } 150 151 if (matched) { 152 device_set_desc(dev, "PCI-ISA bridge"); 153 return(-10000); 154 } 155 return(ENXIO); 156 } 157 158 static int 159 pci_isab_attach(device_t dev) 160 { 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 error = isab_attach(dev); 168 if (error) 169 return (error); 170 171 switch (pci_get_devid(dev)) { 172 case 0x71108086: /* Intel 82371AB */ 173 /* 174 * Sometimes the ELCR (Edge/Level Control Register) is not restored 175 * correctly on resume by the BIOS, so we handle it ourselves. 176 */ 177 rid = 0; 178 bus_set_resource(dev, SYS_RES_IOPORT, rid, ELCR_IOADDR, ELCR_IOLEN); 179 sc->elcr_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 180 RF_ACTIVE); 181 if (sc->elcr_res == NULL) 182 device_printf(dev, "failed to allocate ELCR resource\n"); 183 break; 184 } 185 186 return(0); 187 } 188 189 static int 190 isab_detach(device_t dev) 191 { 192 struct isab_softc *sc = device_get_softc(dev); 193 194 if (sc->elcr_res != NULL) 195 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->elcr_res); 196 197 return (bus_generic_detach(dev)); 198 } 199 200 static int 201 isab_suspend(device_t dev) 202 { 203 struct isab_softc *sc = device_get_softc(dev); 204 bus_space_tag_t bst; 205 bus_space_handle_t bsh; 206 int i; 207 208 /* Save the ELCR if required. */ 209 if (sc->elcr_res != NULL) { 210 bst = rman_get_bustag(sc->elcr_res); 211 bsh = rman_get_bushandle(sc->elcr_res); 212 for (i = 0; i < ELCR_IOLEN; i++) 213 sc->saved_elcr[i] = bus_space_read_1(bst, bsh, i); 214 } 215 216 return (bus_generic_suspend(dev)); 217 } 218 219 static int 220 isab_resume(device_t dev) 221 { 222 struct isab_softc *sc = device_get_softc(dev); 223 bus_space_tag_t bst; 224 bus_space_handle_t bsh; 225 int i; 226 227 /* Restore the ELCR if required. */ 228 if (sc->elcr_res != NULL) { 229 bst = rman_get_bustag(sc->elcr_res); 230 bsh = rman_get_bushandle(sc->elcr_res); 231 for (i = 0; i < ELCR_IOLEN; i++) 232 bus_space_write_1(bst, bsh, i, sc->saved_elcr[i]); 233 } 234 235 return (bus_generic_resume(dev)); 236 } 237