sys/dev/acpica5/acpi_battery.c

   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: src/sys/dev/acpica/acpi_battery.c,v 1.8 2003/08/11 15:34:43 njl Exp $
  27  * $DragonFly: src/sys/dev/acpica5/acpi_battery.c,v 1.3 2006/09/05 00:55:36 dillon Exp $
  28  */
  29
  30 #include "opt_acpi.h"
  31 #include <sys/param.h>
  32 #include <sys/kernel.h>
  33 #include <sys/malloc.h>
  34 #include <sys/bus.h>
  35 #include <sys/ioccom.h>
  36 #include <sys/sysctl.h>
  37
  38 #include "acpi.h"
  39 #include <dev/acpica5/acpivar.h>
  40 #include <dev/acpica5/acpiio.h>
  41
  42 MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data");
  43
  44 struct acpi_batteries {
  45     TAILQ_ENTRY(acpi_batteries) link;
  46     struct acpi_battdesc        battdesc;
  47 };
  48
  49 static TAILQ_HEAD(,acpi_batteries) acpi_batteries;
  50 static int                      acpi_batteries_initted = 0;
  51 static int                      acpi_batteries_units = 0;
  52 static int                      acpi_battery_info_expire = 5;
  53 static struct acpi_battinfo     acpi_battery_battinfo;
  54
  55 int
  56 acpi_battery_get_units(void)
  57 {
  58     return (acpi_batteries_units);
  59 }
  60
  61 int
  62 acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc)
  63 {
  64     struct acpi_batteries *bp;
  65     int i;
  66
  67     if (logical_unit < 0 || logical_unit >= acpi_batteries_units)
  68         return (ENXIO);
  69
  70     i = 0;
  71     TAILQ_FOREACH(bp, &acpi_batteries, link) {
  72         if (logical_unit == i) {
  73             battdesc->type = bp->battdesc.type;
  74             battdesc->phys_unit = bp->battdesc.phys_unit;
  75             return (0);
  76         }
  77         i++;
  78     }
  79
  80     return (ENXIO);
  81 }
  82
  83 int
  84 acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo)
  85 {
  86     struct acpi_battdesc battdesc;
  87     int error;
  88
  89     error = 0;
  90     if (unit == -1) {
  91         error = acpi_cmbat_get_battinfo(-1, battinfo);
  92         goto out;
  93     } else {
  94         error = acpi_battery_get_battdesc(unit, &battdesc);
  95         if (error != 0)
  96             goto out;
  97
  98         switch (battdesc.type) {
  99         case ACPI_BATT_TYPE_CMBAT:
 100             error = acpi_cmbat_get_battinfo(battdesc.phys_unit, battinfo);
 101             break;
 102         default:
 103             error = ENXIO;
 104             break;
 105         }
 106     }
 107
 108 out:
 109     return (error);
 110 }
 111
 112 int
 113 acpi_battery_get_info_expire(void)
 114 {
 115     return (acpi_battery_info_expire);
 116 }
 117
 118 static int
 119 acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg)
 120 {
 121     union acpi_battery_ioctl_arg *ioctl_arg;
 122     int error, logical_unit;
 123
 124     ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
 125     error = 0;
 126
 127     /*
 128      * No security check required: information retrieval only.  If
 129      * new functions are added here, a check might be required.
 130      */
 131     switch (cmd) {
 132     case ACPIIO_BATT_GET_UNITS:
 133         *(int *)addr = acpi_battery_get_units();
 134         break;
 135     case ACPIIO_BATT_GET_BATTDESC:
 136         logical_unit = ioctl_arg->unit;
 137         error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc);
 138         break;
 139     case ACPIIO_BATT_GET_BATTINFO:
 140         logical_unit = ioctl_arg->unit;
 141         error = acpi_battery_get_battinfo(logical_unit, &ioctl_arg->battinfo);
 142         break;
 143     default:
 144         error = EINVAL;
 145         break;
 146     }
 147
 148     return (error);
 149 }
 150
 151 static int
 152 acpi_battery_sysctl(SYSCTL_HANDLER_ARGS)
 153 {
 154     int val, error;
 155
 156     acpi_battery_get_battinfo(-1, &acpi_battery_battinfo);
 157     val = *(u_int *)oidp->oid_arg1;
 158     error = sysctl_handle_int(oidp, &val, 0, req);
 159     return (error);
 160 }
 161
 162 static int
 163 acpi_battery_init(void)
 164 {
 165     struct acpi_softc   *sc;
 166     device_t             dev;
 167     int                  error;
 168
 169     dev = devclass_get_device(devclass_find("acpi"), 0);
 170     if (dev == NULL)
 171         return (ENXIO);
 172     sc = device_get_softc(dev);
 173     if (sc == NULL)
 174         return (ENXIO);
 175
 176     error = 0;
 177     TAILQ_INIT(&acpi_batteries);
 178     acpi_batteries_initted = 1;
 179
 180     error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS, acpi_battery_ioctl,
 181                                 NULL);
 182     if (error != 0)
 183         return (error);
 184     error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC, acpi_battery_ioctl,
 185                                 NULL);
 186     if (error != 0)
 187         return (error);
 188     error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO, acpi_battery_ioctl,
 189                                 NULL);
 190     if (error != 0)
 191         return (error);
 192
 193     sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx);
 194     sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx,
 195                                    SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
 196                                    OID_AUTO, "battery", CTLFLAG_RD, 0, "");
 197     SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
 198         SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 199         OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD,
 200         &acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", "");
 201     SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
 202         SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 203         OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD,
 204         &acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", "");
 205     SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
 206         SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 207         OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD,
 208         &acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", "");
 209     SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
 210         SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 211         OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, "");
 212     SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
 213         SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 214         OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW,
 215         &acpi_battery_info_expire, 0, "");
 216
 217     return (error);
 218 }
 219
 220 int
 221 acpi_battery_register(int type, int phys_unit)
 222 {
 223     struct acpi_batteries *bp;
 224     int error;
 225
 226     error = 0;
 227     bp = kmalloc(sizeof(*bp), M_ACPIBATT, M_INTWAIT);
 228     bp->battdesc.type = type;
 229     bp->battdesc.phys_unit = phys_unit;
 230     if (acpi_batteries_initted == 0) {
 231         if ((error = acpi_battery_init()) != 0) {
 232             kfree(bp, M_ACPIBATT);
 233             return (error);
 234         }
 235     }
 236
 237     TAILQ_INSERT_TAIL(&acpi_batteries, bp, link);
 238     acpi_batteries_units++;
 239
 240     return (0);
 241 }