acpi_battery.c revision 110894
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: head/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 50MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data"); 51 52/* 53 * ACPI Battery Abstruction Layer. 54 */ 55 56struct acpi_batteries { 57 TAILQ_ENTRY(acpi_batteries) link; 58 struct acpi_battdesc battdesc; 59}; 60 61static TAILQ_HEAD(,acpi_batteries) acpi_batteries; 62static int acpi_batteries_initted = 0; 63static int acpi_batteries_units = 0; 64static int acpi_battery_info_expire = 5; 65static struct acpi_battinfo acpi_battery_battinfo; 66 67int 68acpi_battery_get_units(void) 69{ 70 71 return (acpi_batteries_units); 72} 73 74int 75acpi_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 97int 98acpi_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 } 121out: 122 return (error); 123} 124 125int 126acpi_battery_get_info_expire(void) 127{ 128 129 return (acpi_battery_info_expire); 130} 131 132static int 133acpi_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 171static int 172acpi_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 183static int 184acpi_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 242int 243acpi_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} 267