/*- * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier * Copyright (c) 2000 Michael Smith * Copyright (c) 2000 BSDi * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: head/sys/dev/pci/isa_pci.c 119285 2003-08-22 06:42:59Z imp $ */ /* * PCI:ISA bridge support */ #include #include #include #include #include #include #include #include #include #include #define ELCR_IOADDR 0x4d0 /* Interrupt Edge/Level Control Registers */ #define ELCR_IOLEN 2 struct isab_softc { struct resource *elcr_res; u_char saved_elcr[ELCR_IOLEN]; }; static int isab_probe(device_t dev); static int pci_isab_attach(device_t dev); static int isab_detach(device_t dev); static int isab_resume(device_t dev); static int isab_suspend(device_t dev); static device_method_t isab_methods[] = { /* Device interface */ DEVMETHOD(device_probe, isab_probe), DEVMETHOD(device_attach, pci_isab_attach), DEVMETHOD(device_detach, isab_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, isab_suspend), DEVMETHOD(device_resume, isab_resume), /* Bus interface */ DEVMETHOD(bus_print_child, bus_generic_print_child), DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), DEVMETHOD(bus_release_resource, bus_generic_release_resource), DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), { 0, 0 } }; static driver_t isab_driver = { "isab", isab_methods, sizeof(struct isab_softc), }; DRIVER_MODULE(isab, pci, isab_driver, isab_devclass, 0, 0); /* * XXX we need to add a quirk list here for bridges that don't correctly * report themselves. */ static int isab_probe(device_t dev) { int matched = 0; /* * Try for a generic match based on class/subclass. */ if ((pci_get_class(dev) == PCIC_BRIDGE) && (pci_get_subclass(dev) == PCIS_BRIDGE_ISA)) { matched = 1; } else { /* * These are devices that we *know* are PCI:ISA bridges. * Sometimes, however, they don't report themselves as * such. Check in case one of them is pretending to be * something else. */ switch (pci_get_devid(dev)) { case 0x04848086: /* Intel 82378ZB/82378IB */ case 0x122e8086: /* Intel 82371FB */ case 0x70008086: /* Intel 82371SB */ case 0x71108086: /* Intel 82371AB */ case 0x71988086: /* Intel 82443MX */ case 0x24108086: /* Intel 82801AA (ICH) */ case 0x24208086: /* Intel 82801AB (ICH0) */ case 0x24408086: /* Intel 82801AB (ICH2) */ case 0x00061004: /* VLSI 82C593 */ case 0x05861106: /* VIA 82C586 */ case 0x05961106: /* VIA 82C596 */ case 0x06861106: /* VIA 82C686 */ case 0x153310b9: /* AcerLabs M1533 */ case 0x154310b9: /* AcerLabs M1543 */ case 0x00081039: /* SiS 85c503 */ case 0x00001078: /* Cyrix Cx5510 */ case 0x01001078: /* Cyrix Cx5530 */ case 0xc7001045: /* OPTi 82C700 (FireStar) */ case 0x00011033: /* NEC 0001 (C-bus) */ case 0x002c1033: /* NEC 002C (C-bus) */ case 0x003b1033: /* NEC 003B (C-bus) */ case 0x886a1060: /* UMC UM8886 ISA */ case 0x02001166: /* ServerWorks IB6566 PCI */ if (bootverbose) printf("PCI-ISA bridge with incorrect subclass 0x%x\n", pci_get_subclass(dev)); matched = 1; break; default: break; } } if (matched) { device_set_desc(dev, "PCI-ISA bridge"); return(-10000); } return(ENXIO); } static int pci_isab_attach(device_t dev) { struct isab_softc *sc = device_get_softc(dev); int error, rid; /* * Attach an ISA bus. Note that we can only have one ISA bus. */ error = isab_attach(dev); if (error) return (error); switch (pci_get_devid(dev)) { case 0x71108086: /* Intel 82371AB */ /* * Sometimes the ELCR (Edge/Level Control Register) is not restored * correctly on resume by the BIOS, so we handle it ourselves. */ rid = 0; bus_set_resource(dev, SYS_RES_IOPORT, rid, ELCR_IOADDR, ELCR_IOLEN); sc->elcr_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE); if (sc->elcr_res == NULL) device_printf(dev, "failed to allocate ELCR resource\n"); break; } return(0); } static int isab_detach(device_t dev) { struct isab_softc *sc = device_get_softc(dev); if (sc->elcr_res != NULL) bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->elcr_res); return (bus_generic_detach(dev)); } static int isab_suspend(device_t dev) { struct isab_softc *sc = device_get_softc(dev); bus_space_tag_t bst; bus_space_handle_t bsh; int i; /* Save the ELCR if required. */ if (sc->elcr_res != NULL) { bst = rman_get_bustag(sc->elcr_res); bsh = rman_get_bushandle(sc->elcr_res); for (i = 0; i < ELCR_IOLEN; i++) sc->saved_elcr[i] = bus_space_read_1(bst, bsh, i); } return (bus_generic_suspend(dev)); } static int isab_resume(device_t dev) { struct isab_softc *sc = device_get_softc(dev); bus_space_tag_t bst; bus_space_handle_t bsh; int i; /* Restore the ELCR if required. */ if (sc->elcr_res != NULL) { bst = rman_get_bustag(sc->elcr_res); bsh = rman_get_bushandle(sc->elcr_res); for (i = 0; i < ELCR_IOLEN; i++) bus_space_write_1(bst, bsh, i, sc->saved_elcr[i]); } return (bus_generic_resume(dev)); }