FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/eisa_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:EISA bridge support
     */
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    
    static int      eisab_probe(device_t dev);
    static int      eisab_attach(device_t dev);
    
    static device_method_t eisab_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,             eisab_probe),
        DEVMETHOD(device_attach,            eisab_attach),
        DEVMETHOD(device_shutdown,          bus_generic_shutdown),
        DEVMETHOD(device_suspend,           bus_generic_suspend),
        DEVMETHOD(device_resume,            bus_generic_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 eisab_driver = {
        "eisab",
        eisab_methods,
        0,
    };
    
    static devclass_t eisab_devclass;
    
    DRIVER_MODULE(eisab, pci, eisab_driver, eisab_devclass, 0, 0);
    
    static int
    eisab_probe(device_t dev)
    {
        int         matched = 0;
    
        /*
         * Generic match by class/subclass.
         */
        if ((pci_get_class(dev) == PCIC_BRIDGE) &&
            (pci_get_subclass(dev) == PCIS_BRIDGE_EISA))
            matched = 1;
    
        /*
         * Some bridges don't correctly report their class.
         */
        switch (pci_get_devid(dev)) {
        case 0x04828086:            /* may show up as PCI-HOST or 0:0 */
            matched = 1;
            break;
        default:
            break;
       }
       
       if (matched) {
           device_set_desc(dev, "PCI-EISA bridge");
           return(-10000);
       }
       return(ENXIO);
   }
   
   static int
   eisab_attach(device_t dev)
   {
       /*
        * Attach an EISA bus.  Note that we can only have one EISA bus.
        */
       if (!devclass_get_device(devclass_find("eisa"), 0))
           device_add_child(dev, "eisa", -1);
   
       /*
        * Attach an ISA bus as well, since the EISA bus may have ISA
        * cards installed, and we may have no EISA support in the system.
        */
       if (!devclass_get_device(devclass_find("isa"), 0))
           device_add_child(dev, "isa", -1);
   
       bus_generic_attach(dev);
   
       return(0);
   }

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