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_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/5.4/sys/dev/acpica/acpi_acad.c 139032 2004-12-19 04:17:49Z marks $
   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 <sys/rman.h>
   36 #include <sys/ioccom.h>
   37 #include <sys/malloc.h>
   38 #include <sys/module.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 #include <isa/isavar.h>
   46 #include <isa/pnpvar.h>
   47  
   48 /* Hooks for the ACPI CA debugging infrastructure */
   49 #define _COMPONENT      ACPI_AC_ADAPTER
   50 ACPI_MODULE_NAME("AC_ADAPTER")
   51 
   52 /* Number of times to retry initialization before giving up. */
   53 #define ACPI_ACAD_RETRY_MAX             6
   54 
   55 #define ACPI_DEVICE_CHECK_PNP           0x00
   56 #define ACPI_DEVICE_CHECK_EXISTENCE     0x01
   57 #define ACPI_POWERSOURCE_STAT_CHANGE    0x80
   58 
   59 struct  acpi_acad_softc {
   60     int status;
   61 };
   62 
   63 static void     acpi_acad_get_status(void *);
   64 static void     acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
   65 static int      acpi_acad_probe(device_t);
   66 static int      acpi_acad_attach(device_t);
   67 static int      acpi_acad_ioctl(u_long, caddr_t, void *);
   68 static int      acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
   69 static void     acpi_acad_init_acline(void *arg);
   70 
   71 static device_method_t acpi_acad_methods[] = {
   72     /* Device interface */
   73     DEVMETHOD(device_probe,     acpi_acad_probe),
   74     DEVMETHOD(device_attach,    acpi_acad_attach),
   75 
   76     {0, 0}
   77 };
   78 
   79 static driver_t acpi_acad_driver = {
   80     "acpi_acad",
   81     acpi_acad_methods,
   82     sizeof(struct acpi_acad_softc),
   83 };
   84 
   85 static devclass_t acpi_acad_devclass;
   86 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
   87 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
   88 
   89 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
   90 
   91 static void
   92 acpi_acad_get_status(void *context)
   93 {
   94     struct acpi_acad_softc *sc;
   95     device_t    dev;
   96     ACPI_HANDLE h;
   97     int         newstatus;
   98 
   99     dev = context;
  100     sc = device_get_softc(dev);
  101     h = acpi_get_handle(dev);
  102     newstatus = -1;
  103     acpi_GetInteger(h, "_PSR", &newstatus);
  104 
  105     /* If status is valid and has changed, notify the system. */
  106     ACPI_SERIAL_BEGIN(acad);
  107     if (newstatus != -1 && sc->status != newstatus) {
  108         sc->status = newstatus;
  109         power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
  110             POWER_PROFILE_ECONOMY);
  111         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  112             "%s Line\n", newstatus ? "On" : "Off");
  113         acpi_UserNotify("ACAD", h, newstatus);
  114     }
  115     ACPI_SERIAL_END(acad);
  116 }
  117 
  118 static void
  119 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  120 {
  121     device_t dev;
  122 
  123     dev = (device_t)context;
  124     switch (notify) {
  125     case ACPI_DEVICE_CHECK_PNP:
  126     case ACPI_DEVICE_CHECK_EXISTENCE:
  127     case ACPI_POWERSOURCE_STAT_CHANGE:
  128         /* Temporarily.  It is better to notify policy manager */
  129         AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_get_status, context);
  130         break;
  131     default:
  132         device_printf(dev, "unknown notify %#x\n", notify);
  133         break;
  134     }
  135 }
  136 
  137 static int
  138 acpi_acad_probe(device_t dev)
  139 {
  140     static char *acad_ids[] = { "ACPI0003", NULL };
  141 
  142     if (acpi_disabled("acad") ||
  143         ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
  144         return (ENXIO);
  145 
  146     device_set_desc(dev, "AC Adapter");
  147     return (0);
  148 }
  149 
  150 static int
  151 acpi_acad_attach(device_t dev)
  152 {
  153     struct acpi_acad_softc *sc;
  154     struct acpi_softc      *acpi_sc;
  155     ACPI_HANDLE handle;
  156     int         error;
  157 
  158     sc = device_get_softc(dev);
  159     handle = acpi_get_handle(dev);
  160 
  161     error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
  162     if (error != 0)
  163         return (error);
  164 
  165     if (device_get_unit(dev) == 0) {
  166         acpi_sc = acpi_device_get_parent_softc(dev);
  167         SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
  168                         SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
  169                         OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
  170                         &sc->status, 0, acpi_acad_sysctl, "I", "");
  171     }
  172 
  173     /* Get initial status after whole system is up. */
  174     sc->status = -1;
  175 
  176     /*
  177      * Install both system and device notify handlers since the Casio
  178      * FIVA needs them.
  179      */
  180     AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
  181                              acpi_acad_notify_handler, dev);
  182     AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
  183 
  184     return (0);
  185 }
  186 
  187 static int
  188 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
  189 {
  190     struct acpi_acad_softc *sc;
  191     device_t dev;
  192 
  193     dev = (device_t)arg;
  194     sc = device_get_softc(dev);
  195 
  196     /*
  197      * No security check required: information retrieval only.  If
  198      * new functions are added here, a check might be required.
  199      */
  200     switch (cmd) {
  201     case ACPIIO_ACAD_GET_STATUS:
  202         acpi_acad_get_status(dev);
  203         *(int *)addr = sc->status;
  204         break;
  205     default:
  206         break;
  207     }
  208 
  209     return (0);
  210 }
  211 
  212 static int
  213 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
  214 {
  215     int val, error;
  216 
  217     if (acpi_acad_get_acline(&val) != 0)
  218         return (ENXIO);
  219 
  220     val = *(u_int *)oidp->oid_arg1;
  221     error = sysctl_handle_int(oidp, &val, 0, req);
  222     return (error);
  223 }
  224 
  225 static void
  226 acpi_acad_init_acline(void *arg)
  227 {
  228     struct acpi_acad_softc *sc;
  229     device_t    dev;
  230     int         retry;
  231 
  232     dev = (device_t)arg;
  233     sc = device_get_softc(dev);
  234     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  235                 "acline initialization start\n");
  236 
  237     for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
  238         acpi_acad_get_status(dev);
  239         if (sc->status != -1)
  240             break;
  241         AcpiOsSleep(10000);
  242     }
  243 
  244     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  245                 "acline initialization done, tried %d times\n", retry + 1);
  246 }
  247 
  248 /*
  249  * Public interfaces.
  250  */
  251 int
  252 acpi_acad_get_acline(int *status)
  253 {
  254     struct acpi_acad_softc *sc;
  255     device_t dev;
  256 
  257     dev = devclass_get_device(acpi_acad_devclass, 0);
  258     if (dev == NULL)
  259         return (ENXIO);
  260     sc = device_get_softc(dev);
  261 
  262     acpi_acad_get_status(dev);
  263     *status = sc->status;
  264 
  265     return (0);
  266 }

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