The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: src/sys/dev/acpica/acpi_isab.c,v 1.11 2009/06/05 18:44:36 jkim
   27  */
   28 
   29 /*
   30  * ISA Bridge driver for Generic ISA Bus Devices.  See section 10.7 of the
   31  * ACPI 2.0a specification for details on this device.
   32  */
   33 
   34 #include "opt_acpi.h"
   35 #include <sys/param.h>
   36 #include <sys/bus.h>
   37 #include <sys/kernel.h>
   38 #include <sys/malloc.h>
   39 #include <sys/module.h>
   40 
   41 #include "acpi.h"
   42 #include "accommon.h"
   43 
   44 #include <dev/acpica/acpivar.h>
   45 #include <bus/isa/isavar.h>
   46 
   47 /* Hooks for the ACPI CA debugging infrastructure. */
   48 #define _COMPONENT      ACPI_BUS
   49 ACPI_MODULE_NAME("ISA_ACPI")
   50 
   51 struct acpi_isab_softc {
   52         device_t        ap_dev;
   53         ACPI_HANDLE     ap_handle;
   54 };
   55 
   56 static int      acpi_isab_probe(device_t bus);
   57 static int      acpi_isab_attach(device_t bus);
   58 static int      acpi_isab_read_ivar(device_t dev, device_t child, int which,
   59                     uintptr_t *result);
   60 
   61 static device_method_t acpi_isab_methods[] = {
   62         /* Device interface */
   63         DEVMETHOD(device_probe,         acpi_isab_probe),
   64         DEVMETHOD(device_attach,        acpi_isab_attach),
   65         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   66         DEVMETHOD(device_suspend,       bus_generic_suspend),
   67         DEVMETHOD(device_resume,        bus_generic_resume),
   68 
   69         /* Bus interface */
   70         DEVMETHOD(bus_print_child,      bus_generic_print_child),
   71         DEVMETHOD(bus_read_ivar,        acpi_isab_read_ivar),
   72         DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
   73         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
   74         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   75         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   76         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   77         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   78 
   79         DEVMETHOD_END
   80 };
   81 
   82 static driver_t acpi_isab_driver = {
   83         "isab",
   84         acpi_isab_methods,
   85         sizeof(struct acpi_isab_softc),
   86 };
   87 
   88 DRIVER_MODULE(acpi_isab, acpi, acpi_isab_driver, isab_devclass, NULL, NULL);
   89 MODULE_DEPEND(acpi_isab, acpi, 1, 1, 1);
   90 
   91 static int
   92 acpi_isab_probe(device_t dev)
   93 {
   94         static char *isa_ids[] = { "PNP0A05", "PNP0A06", NULL };
   95 
   96         if (acpi_disabled("isab") ||
   97             ACPI_ID_PROBE(device_get_parent(dev), dev, isa_ids) == NULL ||
   98             devclass_get_device(isab_devclass, 0) != dev)
   99                 return (ENXIO);
  100 
  101         device_set_desc(dev, "ACPI Generic ISA bridge");
  102         return (0);
  103 }
  104 
  105 static int
  106 acpi_isab_attach(device_t dev)
  107 {
  108         struct acpi_isab_softc *sc;
  109 
  110         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  111 
  112         sc = device_get_softc(dev);
  113         sc->ap_dev = dev;
  114         sc->ap_handle = acpi_get_handle(dev);
  115 
  116         return (isab_attach(dev));
  117 }
  118 
  119 static int
  120 acpi_isab_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  121 {
  122         struct acpi_isab_softc *sc = device_get_softc(dev);
  123 
  124         switch (which) {
  125         case ACPI_IVAR_HANDLE:
  126                 *result = (uintptr_t)sc->ap_handle;
  127                 return (0);
  128         }
  129         return (ENOENT);
  130 }

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