acpi_battery.c revision 143002
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 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi_battery.c 143002 2005-03-02 09:22:34Z obrien $"); 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/acpica/acpivar.h> 40#include <dev/acpica/acpiio.h> 41 42MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data"); 43 44struct acpi_batteries { 45 TAILQ_ENTRY(acpi_batteries) link; 46 struct acpi_battdesc battdesc; 47}; 48 49static TAILQ_HEAD(,acpi_batteries) acpi_batteries; 50static int acpi_batteries_initted; 51static int acpi_batteries_units; 52static int acpi_battery_info_expire = 5; 53static struct acpi_battinfo acpi_battery_battinfo; 54ACPI_SERIAL_DECL(battery, "ACPI generic battery"); 55 56int 57acpi_battery_get_info_expire(void) 58{ 59 return (acpi_battery_info_expire); 60} 61 62int 63acpi_battery_get_units(void) 64{ 65 return (acpi_batteries_units); 66} 67 68int 69acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc) 70{ 71 struct acpi_batteries *bp; 72 int error, i; 73 74 error = ENXIO; 75 ACPI_SERIAL_BEGIN(battery); 76 if (logical_unit < 0 || logical_unit >= acpi_batteries_units) 77 goto out; 78 79 i = 0; 80 TAILQ_FOREACH(bp, &acpi_batteries, link) { 81 if (logical_unit == i) { 82 battdesc->type = bp->battdesc.type; 83 battdesc->phys_unit = bp->battdesc.phys_unit; 84 error = 0; 85 break; 86 } 87 i++; 88 } 89 90out: 91 ACPI_SERIAL_END(battery); 92 return (error); 93} 94 95int 96acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo) 97{ 98 struct acpi_battdesc battdesc; 99 int error; 100 101 error = 0; 102 if (unit == -1) { 103 error = acpi_cmbat_get_battinfo(-1, battinfo); 104 goto out; 105 } else { 106 error = acpi_battery_get_battdesc(unit, &battdesc); 107 if (error != 0) 108 goto out; 109 110 switch (battdesc.type) { 111 case ACPI_BATT_TYPE_CMBAT: 112 error = acpi_cmbat_get_battinfo(battdesc.phys_unit, battinfo); 113 break; 114 default: 115 error = ENXIO; 116 break; 117 } 118 } 119 120out: 121 return (error); 122} 123 124static int 125acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg) 126{ 127 union acpi_battery_ioctl_arg *ioctl_arg; 128 int error, logical_unit; 129 130 ioctl_arg = (union acpi_battery_ioctl_arg *)addr; 131 error = 0; 132 133 /* 134 * No security check required: information retrieval only. If 135 * new functions are added here, a check might be required. 136 */ 137 switch (cmd) { 138 case ACPIIO_BATT_GET_UNITS: 139 *(int *)addr = acpi_battery_get_units(); 140 break; 141 case ACPIIO_BATT_GET_BATTDESC: 142 logical_unit = ioctl_arg->unit; 143 error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc); 144 break; 145 case ACPIIO_BATT_GET_BATTINFO: 146 logical_unit = ioctl_arg->unit; 147 error = acpi_battery_get_battinfo(logical_unit, &ioctl_arg->battinfo); 148 break; 149 default: 150 error = EINVAL; 151 break; 152 } 153 154 return (error); 155} 156 157static int 158acpi_battery_sysctl(SYSCTL_HANDLER_ARGS) 159{ 160 int val, error; 161 162 acpi_battery_get_battinfo(-1, &acpi_battery_battinfo); 163 val = *(u_int *)oidp->oid_arg1; 164 error = sysctl_handle_int(oidp, &val, 0, req); 165 return (error); 166} 167 168static int 169acpi_battery_init(void) 170{ 171 struct acpi_softc *sc; 172 device_t dev; 173 int error; 174 175 ACPI_SERIAL_ASSERT(battery); 176 177 error = ENXIO; 178 dev = devclass_get_device(devclass_find("acpi"), 0); 179 if (dev == NULL) 180 goto out; 181 sc = device_get_softc(dev); 182 183 TAILQ_INIT(&acpi_batteries); 184 185 /* XXX We should back out registered ioctls on error. */ 186 error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS, acpi_battery_ioctl, 187 NULL); 188 if (error != 0) 189 goto out; 190 error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC, acpi_battery_ioctl, 191 NULL); 192 if (error != 0) 193 goto out; 194 error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO, acpi_battery_ioctl, 195 NULL); 196 if (error != 0) 197 goto out; 198 199 sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx); 200 sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx, 201 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, "battery", CTLFLAG_RD, 202 0, ""); 203 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx, 204 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 205 OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD, 206 &acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", ""); 207 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx, 208 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 209 OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD, 210 &acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", ""); 211 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx, 212 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 213 OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD, 214 &acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", ""); 215 SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx, 216 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 217 OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, ""); 218 SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx, 219 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 220 OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW, 221 &acpi_battery_info_expire, 0, ""); 222 223 acpi_batteries_initted = TRUE; 224 225out: 226 return (error); 227} 228 229int 230acpi_battery_register(int type, int phys_unit) 231{ 232 struct acpi_batteries *bp; 233 int error; 234 235 error = 0; 236 bp = malloc(sizeof(*bp), M_ACPIBATT, M_NOWAIT); 237 if (bp == NULL) 238 return (ENOMEM); 239 240 ACPI_SERIAL_BEGIN(battery); 241 if (!acpi_batteries_initted && (error = acpi_battery_init()) != 0) { 242 printf("acpi_battery_register failed for unit %d\n", phys_unit); 243 goto out; 244 } 245 bp->battdesc.type = type; 246 bp->battdesc.phys_unit = phys_unit; 247 TAILQ_INSERT_TAIL(&acpi_batteries, bp, link); 248 acpi_batteries_units++; 249 250out: 251 ACPI_SERIAL_END(battery); 252 if (error) 253 free(bp, M_ACPIBATT); 254 return (error); 255} 256 257int 258acpi_battery_remove(int type, int phys_unit) 259{ 260 struct acpi_batteries *bp, *tmp; 261 int ret; 262 263 ret = ENOENT; 264 ACPI_SERIAL_BEGIN(battery); 265 TAILQ_FOREACH_SAFE(bp, &acpi_batteries, link, tmp) { 266 if (bp->battdesc.type == type && bp->battdesc.phys_unit == phys_unit) { 267 TAILQ_REMOVE(&acpi_batteries, bp, link); 268 acpi_batteries_units--; 269 ret = 0; 270 break; 271 } 272 } 273 ACPI_SERIAL_END(battery); 274 if (ret == 0) 275 free(bp, M_ACPIBATT); 276 return (ret); 277} 278