sys/dev/acpica/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 1.8.2.1 2003/08/22 20:49:20 jhb Exp $
  27  *      $DragonFly: src/sys/dev/acpica/Attic/acpi_battery.c,v 1.2 2004/05/05 22:19:22 dillon Exp $
  28  */
  29
  30 #include "opt_acpi.h"           /* XXX trim includes */
  31 #include <sys/param.h>
  32 #include <sys/kernel.h>
  33 #include <sys/proc.h>
  34 #include <sys/malloc.h>
  35 #include <sys/bus.h>
  36 #include <sys/conf.h>
  37 #include <sys/ioccom.h>
  38 #include <sys/reboot.h>
  39 #include <sys/sysctl.h>
  40 #include <sys/ctype.h>
  41
  42 #include <machine/clock.h>
  43
  44 #include <machine/resource.h>
  45
  46 #include "acpi.h"
  47
  48 #include <dev/acpica/acpivar.h>
  49 #include <dev/acpica/acpiio.h>
  50
  51 MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data");
  52
  53 /*
  54  * ACPI Battery Abstruction Layer.
  55  */
  56
  57 struct acpi_batteries {
  58         TAILQ_ENTRY(acpi_batteries) link;
  59         struct   acpi_battdesc battdesc;
  60 };
  61
  62 static TAILQ_HEAD(,acpi_batteries) acpi_batteries;
  63 static int                      acpi_batteries_initted = 0;
  64 static int                      acpi_batteries_units = 0;
  65 static int                      acpi_battery_info_expire = 5;
  66 static struct acpi_battinfo     acpi_battery_battinfo;
  67
  68 int
  69 acpi_battery_get_units(void)
  70 {
  71
  72         return (acpi_batteries_units);
  73 }
  74
  75 int
  76 acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc)
  77 {
  78         int      i;
  79         struct acpi_batteries   *bp;
  80
  81         if (logical_unit < 0 || logical_unit >= acpi_batteries_units) {
  82                 return (ENXIO);
  83         }
  84
  85         i = 0;
  86         TAILQ_FOREACH(bp, &acpi_batteries, link) {
  87                 if (logical_unit == i) {
  88                         battdesc->type = bp->battdesc.type;
  89                         battdesc->phys_unit = bp->battdesc.phys_unit;
  90                         return (0);
  91                 }
  92                 i++;
  93         }
  94
  95         return (ENXIO);
  96 }
  97
  98 int
  99 acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo)
 100 {
 101         int      error;
 102         struct   acpi_battdesc battdesc;
 103
 104         error = 0;
 105         if (unit == -1) {
 106                 error = acpi_cmbat_get_battinfo(-1, battinfo);
 107                 goto out;
 108         } else {
 109                 if ((error = acpi_battery_get_battdesc(unit, &battdesc)) != 0) {
 110                         goto out;
 111                 }
 112                 switch (battdesc.type) {
 113                 case ACPI_BATT_TYPE_CMBAT:
 114                         error = acpi_cmbat_get_battinfo(battdesc.phys_unit,
 115                            battinfo);
 116                         break;
 117                 default:
 118                         error = ENXIO;
 119                         break;
 120                 }
 121         }
 122 out:
 123         return (error);
 124 }
 125
 126 int
 127 acpi_battery_get_info_expire(void)
 128 {
 129
 130         return (acpi_battery_info_expire);
 131 }
 132
 133 static int
 134 acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg)
 135 {
 136         int      error;
 137         int      logical_unit;
 138         union acpi_battery_ioctl_arg    *ioctl_arg;
 139
 140         ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
 141         error = 0;
 142
 143         /*
 144          * No security check required: information retrieval only.  If
 145          * new functions are added here, a check might be required.
 146          */
 147
 148         switch (cmd) {
 149         case ACPIIO_BATT_GET_UNITS:
 150                 *(int *)addr = acpi_battery_get_units();
 151                 break;
 152
 153         case ACPIIO_BATT_GET_BATTDESC:
 154                 logical_unit = ioctl_arg->unit;
 155                 error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc);
 156                 break;
 157
 158         case ACPIIO_BATT_GET_BATTINFO:
 159                 logical_unit = ioctl_arg->unit;
 160                 error = acpi_battery_get_battinfo(logical_unit,
 161                     &ioctl_arg->battinfo);
 162                 break;
 163
 164         default:
 165                 error = EINVAL;
 166                 break;
 167         }
 168
 169         return (error);
 170 }
 171
 172 static int
 173 acpi_battery_sysctl(SYSCTL_HANDLER_ARGS)
 174 {
 175         int     val;
 176         int     error;
 177
 178         acpi_battery_get_battinfo(-1, &acpi_battery_battinfo);
 179         val = *(u_int *)oidp->oid_arg1;
 180         error = sysctl_handle_int(oidp, &val, 0, req);
 181         return (error);
 182 }
 183
 184 static int
 185 acpi_battery_init(void)
 186 {
 187         device_t                 dev;
 188         struct acpi_softc       *sc;
 189         int                      error;
 190
 191         if ((dev = devclass_get_device(devclass_find("acpi"), 0)) == NULL) {
 192                 return (ENXIO);
 193         }
 194         if ((sc = device_get_softc(dev)) == NULL) {
 195                 return (ENXIO);
 196         }
 197
 198         error = 0;
 199
 200         TAILQ_INIT(&acpi_batteries);
 201         acpi_batteries_initted = 1;
 202
 203         if ((error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS,
 204                         acpi_battery_ioctl, NULL)) != 0) {
 205                 return (error);
 206         }
 207         if ((error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC,
 208                         acpi_battery_ioctl, NULL)) != 0) {
 209                 return (error);
 210         }
 211         if ((error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO,
 212                         acpi_battery_ioctl, NULL)) != 0) {
 213                 return (error);
 214         }
 215
 216         sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx);
 217         sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx,
 218                                 SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
 219                                 OID_AUTO, "battery", CTLFLAG_RD, 0, "");
 220         SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
 221                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 222                 OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD,
 223                 &acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", "");
 224         SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
 225                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 226                 OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD,
 227                 &acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", "");
 228         SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
 229                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 230                 OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD,
 231                 &acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", "");
 232         SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
 233                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 234                 OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, "");
 235         SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
 236                 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
 237                 OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW,
 238                 &acpi_battery_info_expire, 0, "");
 239
 240         return (error);
 241 }
 242
 243 int
 244 acpi_battery_register(int type, int phys_unit)
 245 {
 246         int     error;
 247         struct acpi_batteries   *bp;
 248
 249         error = 0;
 250         bp = malloc(sizeof(*bp), M_ACPIBATT, M_INTWAIT);
 251         bp->battdesc.type = type;
 252         bp->battdesc.phys_unit = phys_unit;
 253         if (acpi_batteries_initted == 0) {
 254                 if ((error = acpi_battery_init()) != 0) {
 255                         free(bp, M_ACPIBATT);
 256                         return(error);
 257                 }
 258         }
 259
 260         TAILQ_INSERT_TAIL(&acpi_batteries, bp, link);
 261         acpi_batteries_units++;
 262
 263         return(0);
 264 }