sys/dev/acpica/acpi_isab.c

   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 ACPICA 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 }