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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: head/sys/dev/acpica/acpi_acad.c 339754 2018-10-26 00:05:46Z takawata $");
   29 
   30 #include "opt_acpi.h"
   31 #include <sys/param.h>
   32 #include <sys/kernel.h>
   33 #include <sys/bus.h>
   34 
   35 #include <machine/bus.h>
   36 #include <sys/rman.h>
   37 #include <sys/ioccom.h>
   38 #include <sys/malloc.h>
   39 #include <sys/module.h>
   40 #include <sys/conf.h>
   41 #include <sys/power.h>
   42 
   43 #include <contrib/dev/acpica/include/acpi.h>
   44 
   45 #include <dev/acpica/acpivar.h>
   46 #include <dev/acpica/acpiio.h>
   47 #include <isa/isavar.h>
   48 #include <isa/pnpvar.h>
   49  
   50 /* Hooks for the ACPI CA debugging infrastructure */
   51 #define _COMPONENT      ACPI_AC_ADAPTER
   52 ACPI_MODULE_NAME("AC_ADAPTER")
   53 
   54 /* Number of times to retry initialization before giving up. */
   55 #define ACPI_ACAD_RETRY_MAX             6
   56 
   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 static void     acpi_acad_ac_only(void *arg);
   71 
   72 static device_method_t acpi_acad_methods[] = {
   73     /* Device interface */
   74     DEVMETHOD(device_probe,     acpi_acad_probe),
   75     DEVMETHOD(device_attach,    acpi_acad_attach),
   76 
   77     DEVMETHOD_END
   78 };
   79 
   80 static driver_t acpi_acad_driver = {
   81     "acpi_acad",
   82     acpi_acad_methods,
   83     sizeof(struct acpi_acad_softc),
   84 };
   85 
   86 static devclass_t acpi_acad_devclass;
   87 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
   88 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
   89 
   90 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
   91 
   92 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
   93 
   94 static void
   95 acpi_acad_get_status(void *context)
   96 {
   97     struct acpi_acad_softc *sc;
   98     device_t    dev;
   99     ACPI_HANDLE h;
  100     int         newstatus;
  101 
  102     dev = context;
  103     sc = device_get_softc(dev);
  104     h = acpi_get_handle(dev);
  105     newstatus = -1;
  106     acpi_GetInteger(h, "_PSR", &newstatus);
  107 
  108     /* If status is valid and has changed, notify the system. */
  109     ACPI_SERIAL_BEGIN(acad);
  110     if (newstatus != -1 && sc->status != newstatus) {
  111         sc->status = newstatus;
  112         ACPI_SERIAL_END(acad);
  113         power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
  114             POWER_PROFILE_ECONOMY);
  115         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  116             "%s Line\n", newstatus ? "On" : "Off");
  117         acpi_UserNotify("ACAD", h, newstatus);
  118     } else
  119         ACPI_SERIAL_END(acad);
  120 }
  121 
  122 static void
  123 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  124 {
  125     device_t dev;
  126 
  127     dev = (device_t)context;
  128     switch (notify) {
  129     case ACPI_NOTIFY_BUS_CHECK:
  130     case ACPI_NOTIFY_DEVICE_CHECK:
  131     case ACPI_POWERSOURCE_STAT_CHANGE:
  132         /* Temporarily.  It is better to notify policy manager */
  133         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
  134         break;
  135     default:
  136         device_printf(dev, "unknown notify %#x\n", notify);
  137         break;
  138     }
  139 }
  140 
  141 static int
  142 acpi_acad_probe(device_t dev)
  143 {
  144     static char *acad_ids[] = { "ACPI0003", NULL };
  145     int rv;
  146 
  147     if (acpi_disabled("acad"))
  148         return (ENXIO);
  149     rv = ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids, NULL);
  150     if (rv <= 0)
  151         device_set_desc(dev, "AC Adapter");
  152     return (rv);
  153 }
  154 
  155 static int
  156 acpi_acad_attach(device_t dev)
  157 {
  158     struct acpi_acad_softc *sc;
  159     struct acpi_softc      *acpi_sc;
  160     ACPI_HANDLE handle;
  161     int         error;
  162 
  163     sc = device_get_softc(dev);
  164     handle = acpi_get_handle(dev);
  165 
  166     error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
  167     if (error != 0)
  168         return (error);
  169 
  170     if (device_get_unit(dev) == 0) {
  171         acpi_sc = acpi_device_get_parent_softc(dev);
  172         SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
  173                         SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
  174                         OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
  175                         &sc->status, 0, acpi_acad_sysctl, "I", "");
  176     }
  177 
  178     /* Get initial status after whole system is up. */
  179     sc->status = -1;
  180 
  181     /*
  182      * Install both system and device notify handlers since the Casio
  183      * FIVA needs them.
  184      */
  185     AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
  186                              acpi_acad_notify_handler, dev);
  187     AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
  188 
  189     return (0);
  190 }
  191 
  192 static int
  193 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
  194 {
  195     struct acpi_acad_softc *sc;
  196     device_t dev;
  197 
  198     dev = (device_t)arg;
  199     sc = device_get_softc(dev);
  200 
  201     /*
  202      * No security check required: information retrieval only.  If
  203      * new functions are added here, a check might be required.
  204      */
  205     switch (cmd) {
  206     case ACPIIO_ACAD_GET_STATUS:
  207         acpi_acad_get_status(dev);
  208         *(int *)addr = sc->status;
  209         break;
  210     default:
  211         break;
  212     }
  213 
  214     return (0);
  215 }
  216 
  217 static int
  218 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
  219 {
  220     int val, error;
  221 
  222     if (acpi_acad_get_acline(&val) != 0)
  223         return (ENXIO);
  224 
  225     val = *(u_int *)oidp->oid_arg1;
  226     error = sysctl_handle_int(oidp, &val, 0, req);
  227     return (error);
  228 }
  229 
  230 static void
  231 acpi_acad_init_acline(void *arg)
  232 {
  233     struct acpi_acad_softc *sc;
  234     device_t    dev;
  235     int         retry;
  236 
  237     dev = (device_t)arg;
  238     sc = device_get_softc(dev);
  239     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  240                 "acline initialization start\n");
  241 
  242     for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
  243         acpi_acad_get_status(dev);
  244         if (sc->status != -1)
  245             break;
  246         AcpiOsSleep(10000);
  247     }
  248 
  249     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  250                 "acline initialization done, tried %d times\n", retry + 1);
  251 }
  252 
  253 /*
  254  * If no AC line devices detected after boot, create an "online" event
  255  * so that userland code can adjust power settings accordingly.  The default
  256  * power profile is "performance" so we don't need to repeat that here.
  257  */
  258 static void
  259 acpi_acad_ac_only(void __unused *arg)
  260 {
  261 
  262     if (devclass_get_count(acpi_acad_devclass) == 0)
  263         acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
  264 }
  265 
  266 /*
  267  * Public interfaces.
  268  */
  269 int
  270 acpi_acad_get_acline(int *status)
  271 {
  272     struct acpi_acad_softc *sc;
  273     device_t dev;
  274 
  275     dev = devclass_get_device(acpi_acad_devclass, 0);
  276     if (dev == NULL)
  277         return (ENXIO);
  278     sc = device_get_softc(dev);
  279 
  280     acpi_acad_get_status(dev);
  281     *status = sc->status;
  282 
  283     return (0);
  284 }

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