sys/dev/acpica/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 1.30 2009/06/05 18:44:36 jkim Exp $
  30  */
  31
  32 #include "opt_acpi.h"
  33 #include <sys/param.h>
  34 #include <sys/kernel.h>
  35 #include <sys/module.h>
  36 #include <sys/bus.h>
  37 #include <sys/proc.h>
  38
  39 #include "acpi.h"
  40 #include "accommon.h"
  41
  42 #include <dev/acpica/acpivar.h>
  43
  44 /* Hooks for the ACPICA debugging infrastructure */
  45 #define _COMPONENT      ACPI_BUTTON
  46 ACPI_MODULE_NAME("LID")
  47
  48 #define ACPI_NOTIFY_STATUS_CHANGED      0x80
  49
  50 struct acpi_lid_softc {
  51     device_t    lid_dev;
  52     ACPI_HANDLE lid_handle;
  53     int         lid_status;     /* open or closed */
  54 };
  55
  56 ACPI_SERIAL_DECL(lid, "ACPI lid");
  57
  58 static int      acpi_lid_probe(device_t dev);
  59 static int      acpi_lid_attach(device_t dev);
  60 static int      acpi_lid_suspend(device_t dev);
  61 static int      acpi_lid_resume(device_t dev);
  62 static void     acpi_lid_notify_status_changed(void *arg);
  63 static void     acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
  64                                         void *context);
  65
  66 static device_method_t acpi_lid_methods[] = {
  67     /* Device interface */
  68     DEVMETHOD(device_probe,     acpi_lid_probe),
  69     DEVMETHOD(device_attach,    acpi_lid_attach),
  70     DEVMETHOD(device_suspend,   acpi_lid_suspend),
  71     DEVMETHOD(device_resume,    acpi_lid_resume),
  72
  73     DEVMETHOD_END
  74 };
  75
  76 static driver_t acpi_lid_driver = {
  77     "acpi_lid",
  78     acpi_lid_methods,
  79     sizeof(struct acpi_lid_softc),
  80     .gpri = KOBJ_GPRI_ACPI
  81 };
  82
  83 static devclass_t acpi_lid_devclass;
  84 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, NULL, NULL);
  85 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
  86
  87 static int
  88 acpi_lid_probe(device_t dev)
  89 {
  90     static char *lid_ids[] = { "PNP0C0D", NULL };
  91
  92     ACPI_SERIAL_INIT(lid);
  93
  94     if (acpi_disabled("lid") ||
  95         ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL)
  96         return (ENXIO);
  97
  98     device_set_desc(dev, "Control Method Lid Switch");
  99     return (0);
 100 }
 101
 102 static int
 103 acpi_lid_attach(device_t dev)
 104 {
 105     struct acpi_prw_data        prw;
 106     struct acpi_lid_softc       *sc;
 107
 108     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 109
 110     sc = device_get_softc(dev);
 111     sc->lid_dev = dev;
 112     sc->lid_handle = acpi_get_handle(dev);
 113
 114     ACPI_SERIAL_INIT(lid);
 115
 116     /*
 117      * If a system does not get lid events, it may make sense to change
 118      * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake and
 119      * runtime notify in that case though.
 120      */
 121     AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
 122                              acpi_lid_notify_handler, sc);
 123
 124     /* Enable the GPE for wake/runtime */
 125     acpi_wake_set_enable(dev, 1);
 126     if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
 127         AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
 128
 129     return (0);
 130 }
 131
 132 static int
 133 acpi_lid_suspend(device_t dev)
 134 {
 135     return (0);
 136 }
 137
 138 static int
 139 acpi_lid_resume(device_t dev)
 140 {
 141     return (0);
 142 }
 143
 144 static void
 145 acpi_lid_notify_status_changed(void *arg)
 146 {
 147     struct acpi_lid_softc       *sc;
 148     struct acpi_softc           *acpi_sc;
 149     ACPI_STATUS                 status;
 150
 151     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 152
 153     sc = (struct acpi_lid_softc *)arg;
 154     ACPI_SERIAL_BEGIN(lid);
 155
 156     /*
 157      * Evaluate _LID and check the return value, update lid status.
 158      *  Zero:           The lid is closed
 159      *  Non-zero:       The lid is open
 160      */
 161     status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
 162     if (ACPI_FAILURE(status))
 163         goto out;
 164
 165     acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
 166     if (acpi_sc == NULL)
 167         goto out;
 168
 169     ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
 170                 sc->lid_status ? "opened" : "closed");
 171
 172     acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
 173
 174     if (sc->lid_status == 0)
 175         EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
 176     else
 177         EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
 178
 179 out:
 180     ACPI_SERIAL_END(lid);
 181     return_VOID;
 182 }
 183
 184 static void
 185 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 186 {
 187     struct acpi_lid_softc       *sc;
 188
 189     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 190
 191     sc = (struct acpi_lid_softc *)context;
 192     switch (notify) {
 193     case ACPI_NOTIFY_STATUS_CHANGED:
 194         AcpiOsExecute(OSL_NOTIFY_HANDLER,
 195                       acpi_lid_notify_status_changed, sc);
 196         break;
 197     default:
 198         device_printf(sc->lid_dev, "unknown notify: %#x\n", notify);
 199         break;
 200     }
 201
 202     return_VOID;
 203 }