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

     /*-
      * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      $FreeBSD: releng/5.2/sys/dev/acpica/acpi_battery.c 118783 2003-08-11 15:34:43Z njl $
     */
    
    #include "opt_acpi.h"
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/bus.h>
    #include <sys/ioccom.h>
    #include <sys/sysctl.h>
    
    #include "acpi.h"
    #include <dev/acpica/acpivar.h>
    #include <dev/acpica/acpiio.h>
    
    MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data");
    
    struct acpi_batteries {
        TAILQ_ENTRY(acpi_batteries) link;
        struct acpi_battdesc        battdesc;
    };
    
    static TAILQ_HEAD(,acpi_batteries) acpi_batteries;
    static int                      acpi_batteries_initted = 0;
    static int                      acpi_batteries_units = 0;
    static int                      acpi_battery_info_expire = 5;
    static struct acpi_battinfo     acpi_battery_battinfo;
    
    int
    acpi_battery_get_units(void)
    {
        return (acpi_batteries_units);
    }
    
    int
    acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc)
    {
        struct acpi_batteries *bp;
        int i;
    
        if (logical_unit < 0 || logical_unit >= acpi_batteries_units)
            return (ENXIO);
    
        i = 0;
        TAILQ_FOREACH(bp, &acpi_batteries, link) {
            if (logical_unit == i) {
                battdesc->type = bp->battdesc.type;
                battdesc->phys_unit = bp->battdesc.phys_unit;
                return (0);
            }
            i++;
        }
    
        return (ENXIO);
    }
    
    int
    acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo)
    {
        struct acpi_battdesc battdesc;
        int error;
    
        error = 0;
        if (unit == -1) {
            error = acpi_cmbat_get_battinfo(-1, battinfo);
            goto out;
        } else {
            error = acpi_battery_get_battdesc(unit, &battdesc);
            if (error != 0)
                goto out;
    
            switch (battdesc.type) {
            case ACPI_BATT_TYPE_CMBAT:
                error = acpi_cmbat_get_battinfo(battdesc.phys_unit, battinfo);
               break;
           default:
               error = ENXIO;
               break;
           }
       }
   
   out:
       return (error);
   }
   
   int
   acpi_battery_get_info_expire(void)
   {
       return (acpi_battery_info_expire);
   }
   
   static int
   acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg)
   {
       union acpi_battery_ioctl_arg *ioctl_arg;
       int error, logical_unit;
   
       ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
       error = 0;
   
       /*
        * No security check required: information retrieval only.  If
        * new functions are added here, a check might be required.
        */
       switch (cmd) {
       case ACPIIO_BATT_GET_UNITS:
           *(int *)addr = acpi_battery_get_units();
           break;
       case ACPIIO_BATT_GET_BATTDESC:
           logical_unit = ioctl_arg->unit;
           error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc);
           break;
       case ACPIIO_BATT_GET_BATTINFO:
           logical_unit = ioctl_arg->unit;
           error = acpi_battery_get_battinfo(logical_unit, &ioctl_arg->battinfo);
           break;
       default:
           error = EINVAL;
           break;
       }
   
       return (error);
   }
   
   static int
   acpi_battery_sysctl(SYSCTL_HANDLER_ARGS)
   {
       int val, error;
   
       acpi_battery_get_battinfo(-1, &acpi_battery_battinfo);
       val = *(u_int *)oidp->oid_arg1;
       error = sysctl_handle_int(oidp, &val, 0, req);
       return (error);
   }
   
   static int
   acpi_battery_init(void)
   {
       struct acpi_softc   *sc;
       device_t             dev;
       int                  error;
   
       dev = devclass_get_device(devclass_find("acpi"), 0);
       if (dev == NULL)
           return (ENXIO);
       sc = device_get_softc(dev);
       if (sc == NULL)
           return (ENXIO);
   
       error = 0;
       TAILQ_INIT(&acpi_batteries);
       acpi_batteries_initted = 1;
   
       error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS, acpi_battery_ioctl,
                                   NULL);
       if (error != 0)
           return (error);
       error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC, acpi_battery_ioctl,
                                   NULL);
       if (error != 0)
           return (error);
       error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO, acpi_battery_ioctl,
                                   NULL);
       if (error != 0)
           return (error);
   
       sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx);
       sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx,
                                      SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
                                      OID_AUTO, "battery", CTLFLAG_RD, 0, "");
       SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
           SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
           OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD,
           &acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", "");
       SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
           SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
           OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD,
           &acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", "");
       SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
           SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
           OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD,
           &acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", "");
       SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
           SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
           OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, "");
       SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
           SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
           OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW,
           &acpi_battery_info_expire, 0, "");
   
       return (error);
   }
   
   int
   acpi_battery_register(int type, int phys_unit)
   {
       struct acpi_batteries *bp;
       int error;
   
       error = 0;
       bp = malloc(sizeof(*bp), M_ACPIBATT, M_NOWAIT);
       if (bp == NULL)
           return (ENOMEM);
   
       bp->battdesc.type = type;
       bp->battdesc.phys_unit = phys_unit;
       if (acpi_batteries_initted == 0) {
           if ((error = acpi_battery_init()) != 0) {
               free(bp, M_ACPIBATT);
               return (error);
           }
       }
                   
       TAILQ_INSERT_TAIL(&acpi_batteries, bp, link);
       acpi_batteries_units++;
   
       return (0);
   }

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