acpi_acad.c

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    1 /*-
    2  * Copyright (c) 2000 Takanori Watanabe
    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: releng/5.1/sys/dev/acpica/acpi_acad.c 110894 2003-02-15 01:46:22Z takawata $
   27  */
   28 
   29 #include "opt_acpi.h"
   30 #include <sys/param.h>
   31 #include <sys/kernel.h>
   32 #include <sys/bus.h>
   33 
   34 #include <machine/bus.h>
   35 #include <machine/resource.h>
   36 #include <sys/rman.h>
   37 #include <sys/ioccom.h>
   38 #include <sys/malloc.h>
   39 #include <sys/conf.h>
   40 #include <sys/power.h>
   41 
   42 #include  "acpi.h"
   43 #include <dev/acpica/acpivar.h>
   44 #include <dev/acpica/acpiio.h>
   45  
   46 /*
   47  * Hooks for the ACPI CA debugging infrastructure
   48  */
   49 #define _COMPONENT      ACPI_AC_ADAPTER
   50 ACPI_MODULE_NAME("AC_ADAPTER")
   51 
   52 #define ACPI_DEVICE_CHECK_PNP           0x00
   53 #define ACPI_DEVICE_CHECK_EXISTENCE     0x01
   54 #define ACPI_POWERSOURCE_STAT_CHANGE    0x80
   55 
   56 static void acpi_acad_get_status(void * );
   57 static void acpi_acad_notify_handler(ACPI_HANDLE , UINT32 ,void *);
   58 static int acpi_acad_probe(device_t);
   59 static int acpi_acad_attach(device_t);
   60 static int acpi_acad_ioctl(u_long, caddr_t, void *);
   61 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
   62 static void acpi_acad_init_acline(void *arg);
   63 
   64 struct  acpi_acad_softc {
   65         int status;
   66 
   67         int initializing;
   68 };
   69 
   70 static void
   71 acpi_acad_get_status(void *context)
   72 {
   73         int newstatus;
   74         device_t dev = context;
   75         struct acpi_acad_softc *sc = device_get_softc(dev);
   76         ACPI_HANDLE h = acpi_get_handle(dev);
   77 
   78         if (ACPI_FAILURE(acpi_EvaluateInteger(h, "_PSR", &newstatus))) {
   79                 sc->status = -1;
   80                 return;
   81         }
   82 
   83         if (sc->status != newstatus) {
   84                 sc->status = newstatus;
   85                 /* set system power profile based on AC adapter status */
   86                 power_profile_set_state(sc->status ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY);
   87                 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
   88                     "%s Line\n",(sc->status) ? "On" : "Off");
   89         }
   90 }
   91 
   92 static void
   93 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
   94 {
   95         device_t dev = context;
   96 
   97         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
   98             "Notify %d\n", notify);
   99 
  100         switch (notify) {
  101         case ACPI_DEVICE_CHECK_PNP:
  102         case ACPI_DEVICE_CHECK_EXISTENCE:
  103         case ACPI_POWERSOURCE_STAT_CHANGE:
  104                 /*Temporally. It is better to notify policy manager*/
  105                 AcpiOsQueueForExecution(OSD_PRIORITY_LO,
  106                     acpi_acad_get_status,context);
  107                 break;
  108         default:
  109                 break;
  110         }
  111 }
  112 
  113 static int
  114 acpi_acad_probe(device_t dev)
  115 {
  116 
  117     if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
  118         acpi_MatchHid(dev, "ACPI0003")) {
  119       
  120       /*
  121        * Set device description 
  122        */
  123         device_set_desc(dev, "AC adapter");
  124         return(0);
  125     }
  126     return(ENXIO);
  127 }
  128 
  129 static int
  130 acpi_acad_attach(device_t dev)
  131 {
  132         int      error;
  133         struct acpi_acad_softc  *sc;
  134         struct acpi_softc       *acpi_sc;
  135 
  136         ACPI_HANDLE handle = acpi_get_handle(dev);
  137         AcpiInstallNotifyHandler(handle, 
  138                                  ACPI_DEVICE_NOTIFY,
  139                                  acpi_acad_notify_handler, dev);
  140         /*Installing system notify is not so good*/
  141         AcpiInstallNotifyHandler(handle, 
  142                                  ACPI_SYSTEM_NOTIFY,
  143                                  acpi_acad_notify_handler, dev);
  144 
  145         if ((sc = device_get_softc(dev)) == NULL) {
  146                 return (ENXIO);
  147         }
  148         if ((error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS,
  149                         acpi_acad_ioctl, dev)) != 0) {
  150                 return (error);
  151         }
  152 
  153         if (device_get_unit(dev) == 0) {
  154                 acpi_sc = acpi_device_get_parent_softc(dev);
  155                 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
  156                         SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
  157                         OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
  158                         &sc->status, 0, acpi_acad_sysctl, "I", "");
  159         }
  160 
  161         /* Get initial status after whole system is up. */
  162         sc->status = -1;
  163         sc->initializing = 0;
  164 
  165         AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
  166 
  167         return(0);
  168 }
  169 
  170 static device_method_t acpi_acad_methods[] = {
  171     /* Device interface */
  172     DEVMETHOD(device_probe,     acpi_acad_probe),
  173     DEVMETHOD(device_attach,    acpi_acad_attach),
  174 
  175     {0, 0}
  176 };
  177 
  178 static driver_t acpi_acad_driver = {
  179     "acpi_acad",
  180     acpi_acad_methods,
  181     sizeof(struct acpi_acad_softc),
  182 };
  183 
  184 static devclass_t acpi_acad_devclass;
  185 DRIVER_MODULE(acpi_acad,acpi,acpi_acad_driver,acpi_acad_devclass,0,0);
  186 
  187 static int
  188 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
  189 {
  190         device_t                 dev;
  191         struct acpi_acad_softc  *sc;
  192 
  193         dev = (device_t)arg;
  194         if ((sc = device_get_softc(dev)) == NULL) {
  195                 return(ENXIO);
  196         }
  197 
  198         /*
  199          * No security check required: information retrieval only.  If
  200          * new functions are added here, a check might be required.
  201          */
  202 
  203         switch (cmd) {
  204         case ACPIIO_ACAD_GET_STATUS:
  205                 acpi_acad_get_status(dev);
  206                 *(int *)addr = sc->status;
  207                 break;
  208         }
  209 
  210         return(0);
  211 }
  212 
  213 static int
  214 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
  215 {
  216         int     val;
  217         int     error;
  218 
  219         if (acpi_acad_get_acline(&val)) {
  220                 return (ENXIO);
  221         }
  222 
  223         val = *(u_int *)oidp->oid_arg1;
  224         error = sysctl_handle_int(oidp, &val, 0, req);
  225         return (error);
  226 }
  227 
  228 static void
  229 acpi_acad_init_acline(void *arg)
  230 {
  231         int             retry;
  232         int             status;
  233         device_t        dev = (device_t)arg;
  234         struct acpi_acad_softc  *sc = device_get_softc(dev);
  235 #define ACPI_ACAD_RETRY_MAX     6
  236 
  237         if (sc->initializing) {
  238                 return;
  239         }
  240 
  241         sc->initializing = 1;
  242 
  243         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  244                     "acline initialization start\n");
  245 
  246         status = 0;
  247         for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++, AcpiOsSleep(10, 0)) {
  248                 acpi_acad_get_status(dev);
  249                 if (status != sc->status)
  250                         break;
  251         }
  252 
  253         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  254                     "acline initialization done, tried %d times\n", retry+1);
  255 
  256         sc->initializing = 0;
  257 }
  258 
  259 /*
  260  * Public interfaces.
  261  */
  262 
  263 int
  264 acpi_acad_get_acline(int *status)
  265 {
  266         device_t                 dev;
  267         struct acpi_acad_softc  *sc;
  268 
  269         if ((dev = devclass_get_device(acpi_acad_devclass, 0)) == NULL) {
  270                 return (ENXIO);
  271         }
  272 
  273         if ((sc = device_get_softc(dev)) == NULL) {
  274                 return (ENXIO);
  275         }
  276 
  277         acpi_acad_get_status(dev);
  278         *status = sc->status;
  279 
  280         return (0);
  281 }
  282

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

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