FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_isab.c

     /*-
      * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
      *
      * 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.
     *
     * 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("$FreeBSD$");
    
    /*
     * ISA Bridge driver for Generic ISA Bus Devices.  See section 10.7 of the
     * ACPI 2.0a specification for details on this device.
     */
    
    #include "opt_acpi.h"
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/module.h>
    
    #include <contrib/dev/acpica/include/acpi.h>
    #include <contrib/dev/acpica/include/accommon.h>
    
    #include <dev/acpica/acpivar.h>
    #include <isa/isavar.h>
    
    /* Hooks for the ACPI CA debugging infrastructure. */
    #define _COMPONENT      ACPI_BUS
    ACPI_MODULE_NAME("ISA_ACPI")
    
    struct acpi_isab_softc {
            device_t        ap_dev;
            ACPI_HANDLE     ap_handle;
    };
    
    static int      acpi_isab_probe(device_t bus);
    static int      acpi_isab_attach(device_t bus);
    static int      acpi_isab_read_ivar(device_t dev, device_t child, int which,
                        uintptr_t *result);
    
    static device_method_t acpi_isab_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         acpi_isab_probe),
            DEVMETHOD(device_attach,        acpi_isab_attach),
            DEVMETHOD(device_shutdown,      bus_generic_shutdown),
            DEVMETHOD(device_suspend,       bus_generic_suspend),
            DEVMETHOD(device_resume,        bus_generic_resume),
    
            /* Bus interface */
            DEVMETHOD(bus_read_ivar,        acpi_isab_read_ivar),
            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),
    
            DEVMETHOD_END
    };
    
    static driver_t acpi_isab_driver = {
            "isab",
            acpi_isab_methods,
            sizeof(struct acpi_isab_softc),
    };
    
    DRIVER_MODULE(acpi_isab, acpi, acpi_isab_driver, isab_devclass, 0, 0);
    MODULE_DEPEND(acpi_isab, acpi, 1, 1, 1);
    
    static int
    acpi_isab_probe(device_t dev)
    {
            static char *isa_ids[] = { "PNP0A05", "PNP0A06", NULL };
    
            if (acpi_disabled("isab") ||
                ACPI_ID_PROBE(device_get_parent(dev), dev, isa_ids) == NULL ||
                devclass_get_device(isab_devclass, 0) != dev)
                    return (ENXIO);
    
           device_set_desc(dev, "ACPI Generic ISA bridge");
           return (0);
   }
   
   static int
   acpi_isab_attach(device_t dev)
   {
           struct acpi_isab_softc *sc;
   
           ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   
           sc = device_get_softc(dev);
           sc->ap_dev = dev;
           sc->ap_handle = acpi_get_handle(dev);
   
           return (isab_attach(dev));
   }
   
   static int
   acpi_isab_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
   {
           struct acpi_isab_softc *sc = device_get_softc(dev);
   
           switch (which) {
           case ACPI_IVAR_HANDLE:
                   *result = (uintptr_t)sc->ap_handle;
                   return (0);
           }
           return (ENOENT);
   }

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