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 * $FreeBSD$ 27 */ 28 29 #include "opt_acpi.h" 30 #include <sys/param.h> 31 #include <sys/kernel.h> 32 #include <sys/malloc.h> 33 #include <sys/bus.h> 34 #include <sys/ioccom.h> 35 #include <sys/sysctl.h> 36 37 #include "acpi.h" 38 #include <dev/acpica/acpivar.h> 39 #include <dev/acpica/acpiio.h> 40 41 MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data"); 42 43 struct acpi_batteries { 44 TAILQ_ENTRY(acpi_batteries) link; 45 struct acpi_battdesc battdesc; 46 }; 47 48 static TAILQ_HEAD(,acpi_batteries) acpi_batteries; 49 static int acpi_batteries_initted; 50 static int acpi_batteries_units; 51 static int acpi_battery_info_expire = 5; 52 static struct acpi_battinfo acpi_battery_battinfo; 53 ACPI_SERIAL_DECL(battery, "ACPI generic battery"); 54 55 int 56 acpi_battery_get_info_expire(void) 57 { 58 return (acpi_battery_info_expire); 59 } 60 61 int 62 acpi_battery_get_units(void) 63 { 64 return (acpi_batteries_units); 65 } 66 67 int 68 acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc) 69 { 70 struct acpi_batteries *bp; 71 int error, i; 72 73 error = ENXIO; 74 ACPI_SERIAL_BEGIN(battery); 75 if (logical_unit < 0 || logical_unit >= acpi_batteries_units) 76 goto out; 77 78 i = 0; 79 TAILQ_FOREACH(bp, &acpi_batteries, link) { 80 if (logical_unit == i) { 81 battdesc->type = bp->battdesc.type; 82 battdesc->phys_unit = bp->battdesc.phys_unit; 83 error = 0; 84 break; 85 } 86 i++; 87 } 88 89 out: 90 ACPI_SERIAL_END(battery); 91 return (error); 92 } 93 94 int 95 acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo) 96 { 97 struct acpi_battdesc battdesc; 98 int error; 99 100 error = 0; 101 if (unit == -1) { 102 error = acpi_cmbat_get_battinfo(-1, battinfo); 103 goto out; 104 } else { 105 error = acpi_battery_get_battdesc(unit, &battdesc); 106 if (error != 0) 107 goto out; 108 109 switch (battdesc.type) { 110 case ACPI_BATT_TYPE_CMBAT: 111 error = acpi_cmbat_get_battinfo(battdesc.phys_unit, battinfo); 112 break; 113 default: 114 error = ENXIO; 115 break; 116 } 117 } 118 119 out: 120 return (error); 121 } 122 123 static int 124 acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg) 125 { 126 union acpi_battery_ioctl_arg *ioctl_arg; 127 int error, logical_unit; 128 129 ioctl_arg = (union acpi_battery_ioctl_arg *)addr; 130 error = 0; 131 132 /* 133 * No security check required: information retrieval only. If 134 * new functions are added here, a check might be required. 135 */ 136 switch (cmd) { 137 case ACPIIO_BATT_GET_UNITS: 138 *(int *)addr = acpi_battery_get_units(); 139 break; 140 case ACPIIO_BATT_GET_BATTDESC: 141 logical_unit = ioctl_arg->unit; 142 error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc); 143 break; 144 case ACPIIO_BATT_GET_BATTINFO: 145 logical_unit = ioctl_arg->unit; 146 error = acpi_battery_get_battinfo(logical_unit, &ioctl_arg->battinfo); 147 break; 148 default: 149 error = EINVAL; 150 break; 151 } 152 153 return (error); 154 } 155 156 static int 157 acpi_battery_sysctl(SYSCTL_HANDLER_ARGS) 158 { 159 int val, error; 160 161 acpi_battery_get_battinfo(-1, &acpi_battery_battinfo); 162 val = *(u_int *)oidp->oid_arg1; 163 error = sysctl_handle_int(oidp, &val, 0, req); 164 return (error); 165 } 166 167 static int 168 acpi_battery_init(void) 169 { 170 struct acpi_softc *sc; 171 device_t dev; 172 int error; 173 174 ACPI_SERIAL_ASSERT(battery); 175 176 error = ENXIO; 177 dev = devclass_get_device(devclass_find("acpi"), 0); 178 if (dev == NULL) 179 goto out; 180 sc = device_get_softc(dev); 181 182 TAILQ_INIT(&acpi_batteries); 183 184 /* XXX We should back out registered ioctls on error. */ 185 error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS, acpi_battery_ioctl, 186 NULL); 187 if (error != 0) 188 goto out; 189 error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC, acpi_battery_ioctl, 190 NULL); 191 if (error != 0) 192 goto out; 193 error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO, acpi_battery_ioctl, 194 NULL); 195 if (error != 0) 196 goto out; 197 198 sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx); 199 sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx, 200 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, "battery", CTLFLAG_RD, 201 0, ""); 202 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx, 203 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 204 OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD, 205 &acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", ""); 206 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx, 207 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 208 OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD, 209 &acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", ""); 210 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx, 211 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 212 OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD, 213 &acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", ""); 214 SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx, 215 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 216 OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, ""); 217 SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx, 218 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree), 219 OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW, 220 &acpi_battery_info_expire, 0, ""); 221 222 acpi_batteries_initted = TRUE; 223 224 out: 225 return (error); 226 } 227 228 int 229 acpi_battery_register(int type, int phys_unit) 230 { 231 struct acpi_batteries *bp; 232 int error; 233 234 error = 0; 235 bp = malloc(sizeof(*bp), M_ACPIBATT, M_NOWAIT); 236 if (bp == NULL) 237 return (ENOMEM); 238 239 ACPI_SERIAL_BEGIN(battery); 240 if (!acpi_batteries_initted && (error = acpi_battery_init()) != 0) { 241 printf("acpi_battery_register failed for unit %d\n", phys_unit); 242 goto out; 243 } 244 bp->battdesc.type = type; 245 bp->battdesc.phys_unit = phys_unit; 246 TAILQ_INSERT_TAIL(&acpi_batteries, bp, link); 247 acpi_batteries_units++; 248 249 out: 250 ACPI_SERIAL_END(battery); 251 if (error) 252 free(bp, M_ACPIBATT); 253 return (error); 254 } 255 256 int 257 acpi_battery_remove(int type, int phys_unit) 258 { 259 struct acpi_batteries *bp, *tmp; 260 int ret; 261 262 ret = ENOENT; 263 ACPI_SERIAL_BEGIN(battery); 264 TAILQ_FOREACH_SAFE(bp, &acpi_batteries, link, tmp) { 265 if (bp->battdesc.type == type && bp->battdesc.phys_unit == phys_unit) { 266 TAILQ_REMOVE(&acpi_batteries, bp, link); 267 acpi_batteries_units--; 268 ret = 0; 269 break; 270 } 271 } 272 ACPI_SERIAL_END(battery); 273 if (ret == 0) 274 free(bp, M_ACPIBATT); 275 return (ret); 276 } 277