sys/dev/acpica5/acpi_lid.c

   1 /*-
   2  * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
   3  * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
   4  * Copyright (c) 2000 Michael Smith <msmith@freebd.org>
   5  * Copyright (c) 2000 BSDi
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/dev/acpica/acpi_lid.c,v 1.23 2004/06/13 22:52:30 njl Exp $
  30  * $DragonFly: src/sys/dev/acpica5/acpi_lid.c,v 1.5 2007/10/23 03:04:48 y0netan1 Exp $
  31  */
  32
  33 #include "opt_acpi.h"
  34 #include <sys/param.h>
  35 #include <sys/kernel.h>
  36 #include <sys/module.h>
  37 #include <sys/bus.h>
  38 #include <sys/proc.h>
  39
  40 #include "acpi.h"
  41 #include "accommon.h"
  42 #include <dev/acpica5/acpivar.h>
  43
  44 /* Hooks for the ACPI CA debugging infrastructure */
  45 #define _COMPONENT      ACPI_BUTTON
  46 ACPI_MODULE_NAME("LID")
  47
  48 struct acpi_lid_softc {
  49     device_t    lid_dev;
  50     ACPI_HANDLE lid_handle;
  51     int         lid_status;     /* open or closed */
  52 };
  53
  54 static int      acpi_lid_probe(device_t dev);
  55 static int      acpi_lid_attach(device_t dev);
  56 static int      acpi_lid_suspend(device_t dev);
  57 static int      acpi_lid_resume(device_t dev);
  58 static void     acpi_lid_notify_status_changed(void *arg);
  59 static void     acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
  60                                         void *context);
  61
  62 static device_method_t acpi_lid_methods[] = {
  63     /* Device interface */
  64     DEVMETHOD(device_probe,     acpi_lid_probe),
  65     DEVMETHOD(device_attach,    acpi_lid_attach),
  66     DEVMETHOD(device_suspend,   acpi_lid_suspend),
  67     DEVMETHOD(device_resume,    acpi_lid_resume),
  68
  69     {0, 0}
  70 };
  71
  72 static driver_t acpi_lid_driver = {
  73     "acpi_lid",
  74     acpi_lid_methods,
  75     sizeof(struct acpi_lid_softc),
  76 };
  77
  78 static devclass_t acpi_lid_devclass;
  79 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
  80 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
  81
  82 static int
  83 acpi_lid_probe(device_t dev)
  84 {
  85     if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("lid") &&
  86         acpi_MatchHid(acpi_get_handle(dev), "PNP0C0D")) {
  87
  88         device_set_desc(dev, "Control Method Lid Switch");
  89         return (0);
  90     }
  91     return (ENXIO);
  92 }
  93
  94 static int
  95 acpi_lid_attach(device_t dev)
  96 {
  97     struct acpi_lid_softc       *sc;
  98
  99     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 100
 101     sc = device_get_softc(dev);
 102     sc->lid_dev = dev;
 103     sc->lid_handle = acpi_get_handle(dev);
 104
 105     /*
 106      * If a system does not get lid events, it may make sense to change
 107      * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake and
 108      * runtime notify in that case though.
 109      */
 110     AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
 111                              acpi_lid_notify_handler, sc);
 112
 113     /* Enable the GPE for wake/runtime. */
 114     acpi_wake_init(dev, ACPI_GPE_TYPE_WAKE_RUN);
 115     acpi_wake_set_enable(dev, 1);
 116
 117     return_VALUE (0);
 118 }
 119
 120 static int
 121 acpi_lid_suspend(device_t dev)
 122 {
 123     struct acpi_softc           *acpi_sc;
 124
 125     acpi_sc = acpi_device_get_parent_softc(dev);
 126     acpi_wake_sleep_prep(dev, acpi_sc->acpi_sstate);
 127     return (0);
 128 }
 129
 130 static int
 131 acpi_lid_resume(device_t dev)
 132 {
 133     acpi_wake_run_prep(dev);
 134     return (0);
 135 }
 136
 137 static void
 138 acpi_lid_notify_status_changed(void *arg)
 139 {
 140     struct acpi_lid_softc       *sc;
 141     struct acpi_softc           *acpi_sc;
 142     ACPI_STATUS                 status;
 143
 144     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 145
 146     sc = (struct acpi_lid_softc *)arg;
 147
 148     /*
 149      * Evaluate _LID and check the return value, update lid status.
 150      *  Zero:           The lid is closed
 151      *  Non-zero:       The lid is open
 152      */
 153     status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
 154     if (ACPI_FAILURE(status))
 155         return_VOID;
 156
 157     acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
 158     if (acpi_sc == NULL)
 159         return_VOID;
 160
 161     ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
 162                 sc->lid_status ? "opened" : "closed");
 163
 164     acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
 165
 166     if (sc->lid_status == 0)
 167         EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
 168     else
 169         EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
 170
 171     return_VOID;
 172 }
 173
 174 /* XXX maybe not here */
 175 #define ACPI_NOTIFY_STATUS_CHANGED      0x80
 176
 177 static void
 178 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 179 {
 180     struct acpi_lid_softc       *sc;
 181
 182     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 183
 184     sc = (struct acpi_lid_softc *)context;
 185     switch (notify) {
 186     case ACPI_NOTIFY_STATUS_CHANGED:
 187         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_lid_notify_status_changed, sc);
 188         break;
 189     default:
 190         device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
 191         break;
 192     }
 193
 194     return_VOID;
 195 }