FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/isa_pci.c

     /*-
      * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
      * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
      * 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     * PCI:ISA bridge support
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <machine/bus.h>
    #include <machine/resource.h>
    #include <sys/bus.h>
    #include <sys/rman.h>
    
    #include <isa/isavar.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    
    #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_any(dev, SYS_RES_IOPORT, &rid,
               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));
   }

Cache object: 83fc9f859156b705930d9b9ae233d1dd