acpi_battery.c

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    1 /*-
    2  * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
    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_battery.c 110894 2003-02-15 01:46:22Z takawata $
   27  */
   28 
   29 #include "opt_acpi.h"           /* XXX trim includes */
   30 #include <sys/param.h>
   31 #include <sys/kernel.h>
   32 #include <sys/proc.h>
   33 #include <sys/malloc.h>
   34 #include <sys/bus.h>
   35 #include <sys/conf.h>
   36 #include <sys/ioccom.h>
   37 #include <sys/reboot.h>
   38 #include <sys/sysctl.h>
   39 #include <sys/ctype.h>
   40 
   41 #include <machine/clock.h>
   42 
   43 #include <machine/resource.h>
   44 
   45 #include "acpi.h"
   46 
   47 #include <dev/acpica/acpivar.h>
   48 #include <dev/acpica/acpiio.h>
   49 
   50 MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data");
   51 
   52 /*
   53  * ACPI Battery Abstruction Layer.
   54  */
   55 
   56 struct acpi_batteries {
   57         TAILQ_ENTRY(acpi_batteries) link;
   58         struct   acpi_battdesc battdesc;
   59 };
   60 
   61 static TAILQ_HEAD(,acpi_batteries) acpi_batteries;
   62 static int                      acpi_batteries_initted = 0;
   63 static int                      acpi_batteries_units = 0;
   64 static int                      acpi_battery_info_expire = 5;
   65 static struct acpi_battinfo     acpi_battery_battinfo;
   66 
   67 int
   68 acpi_battery_get_units(void)
   69 {
   70 
   71         return (acpi_batteries_units);
   72 }
   73 
   74 int
   75 acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc)
   76 {
   77         int      i;
   78         struct acpi_batteries   *bp;
   79 
   80         if (logical_unit < 0 || logical_unit >= acpi_batteries_units) {
   81                 return (ENXIO);
   82         }
   83 
   84         i = 0;
   85         TAILQ_FOREACH(bp, &acpi_batteries, link) {
   86                 if (logical_unit == i) {
   87                         battdesc->type = bp->battdesc.type;
   88                         battdesc->phys_unit = bp->battdesc.phys_unit;
   89                         return (0);
   90                 }
   91                 i++;
   92         }
   93 
   94         return (ENXIO);
   95 }
   96 
   97 int
   98 acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo)
   99 {
  100         int      error;
  101         struct   acpi_battdesc battdesc;
  102 
  103         error = 0;
  104         if (unit == -1) {
  105                 error = acpi_cmbat_get_battinfo(-1, battinfo);
  106                 goto out;
  107         } else {
  108                 if ((error = acpi_battery_get_battdesc(unit, &battdesc)) != 0) {
  109                         goto out;
  110                 }
  111                 switch (battdesc.type) {
  112                 case ACPI_BATT_TYPE_CMBAT:
  113                         error = acpi_cmbat_get_battinfo(battdesc.phys_unit,
  114                            battinfo);
  115                         break;
  116                 default:
  117                         error = ENXIO;
  118                         break;
  119                 }
  120         }
  121 out:
  122         return (error);
  123 }
  124 
  125 int
  126 acpi_battery_get_info_expire(void)
  127 {
  128 
  129         return (acpi_battery_info_expire);
  130 }
  131 
  132 static int
  133 acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg)
  134 {
  135         int      error;
  136         int      logical_unit;
  137         union acpi_battery_ioctl_arg    *ioctl_arg;
  138 
  139         ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
  140         error = 0;
  141 
  142         /*
  143          * No security check required: information retrieval only.  If
  144          * new functions are added here, a check might be required.
  145          */
  146 
  147         switch (cmd) {
  148         case ACPIIO_BATT_GET_UNITS:
  149                 *(int *)addr = acpi_battery_get_units();
  150                 break;
  151 
  152         case ACPIIO_BATT_GET_BATTDESC:
  153                 logical_unit = ioctl_arg->unit;
  154                 error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc);
  155                 break;
  156 
  157         case ACPIIO_BATT_GET_BATTINFO:
  158                 logical_unit = ioctl_arg->unit;
  159                 error = acpi_battery_get_battinfo(logical_unit,
  160                     &ioctl_arg->battinfo);
  161                 break;
  162 
  163         default:
  164                 error = EINVAL;
  165                 break;
  166         }
  167 
  168         return (error);
  169 }
  170 
  171 static int
  172 acpi_battery_sysctl(SYSCTL_HANDLER_ARGS)
  173 {
  174         int     val;
  175         int     error;
  176 
  177         acpi_battery_get_battinfo(-1, &acpi_battery_battinfo);
  178         val = *(u_int *)oidp->oid_arg1;
  179         error = sysctl_handle_int(oidp, &val, 0, req);
  180         return (error);
  181 }
  182 
  183 static int
  184 acpi_battery_init(void)
  185 {
  186         device_t                 dev;
  187         struct acpi_softc       *sc;
  188         int                      error;
  189 
  190         if ((dev = devclass_get_device(devclass_find("acpi"), 0)) == NULL) {
  191                 return (ENXIO);
  192         }
  193         if ((sc = device_get_softc(dev)) == NULL) {
  194                 return (ENXIO);
  195         }
  196 
  197         error = 0;
  198 
  199         TAILQ_INIT(&acpi_batteries);
  200         acpi_batteries_initted = 1;
  201 
  202         if ((error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS,
  203                         acpi_battery_ioctl, NULL)) != 0) {
  204                 return (error);
  205         }
  206         if ((error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC,
  207                         acpi_battery_ioctl, NULL)) != 0) {
  208                 return (error);
  209         }
  210         if ((error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO,
  211                         acpi_battery_ioctl, NULL)) != 0) {
  212                 return (error);
  213         }
  214 
  215         sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx);
  216         sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx,
  217                                 SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
  218                                 OID_AUTO, "battery", CTLFLAG_RD, 0, "");
  219         SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
  220                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
  221                 OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD,
  222                 &acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", "");
  223         SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
  224                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
  225                 OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD,
  226                 &acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", "");
  227         SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
  228                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
  229                 OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD,
  230                 &acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", "");
  231         SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
  232                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
  233                 OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, "");
  234         SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
  235                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
  236                 OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW,
  237                 &acpi_battery_info_expire, 0, "");
  238 
  239         return (error);
  240 }
  241 
  242 int
  243 acpi_battery_register(int type, int phys_unit)
  244 {
  245         int     error;
  246         struct acpi_batteries   *bp;
  247 
  248         error = 0;
  249         if ((bp = malloc(sizeof(*bp), M_ACPIBATT, M_NOWAIT)) == NULL) {
  250                 return(ENOMEM);
  251         }
  252 
  253         bp->battdesc.type = type;
  254         bp->battdesc.phys_unit = phys_unit;
  255         if (acpi_batteries_initted == 0) {
  256                 if ((error = acpi_battery_init()) != 0) {
  257                         free(bp, M_ACPIBATT);
  258                         return(error);
  259                 }
  260         }
  261                 
  262         TAILQ_INSERT_TAIL(&acpi_batteries, bp, link);
  263         acpi_batteries_units++;
  264 
  265         return(0);
  266 }

Cache object: 215fc9081ce9f041fdf745a3e82c91fc

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

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