1 /*- 2 * Copyright (c) 2000 Munehiro Matsuda 3 * Copyright (c) 2000 Takanori Watanabe 4 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include "opt_acpi.h" 32 #include <sys/param.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/bus.h> 36 #include <sys/ioccom.h> 37 38 #include <machine/bus.h> 39 #include <sys/rman.h> 40 #include <sys/malloc.h> 41 42 #include "acpi.h" 43 #include <dev/acpica/acpivar.h> 44 #include <dev/acpica/acpiio.h> 45 46 MALLOC_DEFINE(M_ACPICMBAT, "acpicmbat", "ACPI control method battery data"); 47 48 /* Number of times to retry initialization before giving up. */ 49 #define ACPI_CMBAT_RETRY_MAX 6 50 51 /* Check the battery once a minute. */ 52 #define CMBAT_POLLRATE (60 * hz) 53 54 /* Hooks for the ACPI CA debugging infrastructure */ 55 #define _COMPONENT ACPI_BATTERY 56 ACPI_MODULE_NAME("BATTERY") 57 58 #define ACPI_BATTERY_BST_CHANGE 0x80 59 #define ACPI_BATTERY_BIF_CHANGE 0x81 60 61 struct acpi_cmbat_softc { 62 device_t dev; 63 64 struct acpi_bif bif; 65 struct acpi_bst bst; 66 struct timespec bif_lastupdated; 67 struct timespec bst_lastupdated; 68 int bif_updating; 69 int bst_updating; 70 71 int present; 72 int cap; 73 int min; 74 int full_charge_time; 75 int initializing; 76 int phys_unit; 77 }; 78 79 static struct timespec acpi_cmbat_info_lastupdated; 80 81 /* XXX: devclass_get_maxunit() don't give us the current allocated units. */ 82 static int acpi_cmbat_units = 0; 83 84 static int acpi_cmbat_info_expired(struct timespec *); 85 static void acpi_cmbat_info_updated(struct timespec *); 86 static void acpi_cmbat_get_bst(void *); 87 static void acpi_cmbat_get_bif(void *); 88 static void acpi_cmbat_notify_handler(ACPI_HANDLE, UINT32, void *); 89 static int acpi_cmbat_probe(device_t); 90 static int acpi_cmbat_attach(device_t); 91 static int acpi_cmbat_detach(device_t); 92 static int acpi_cmbat_resume(device_t); 93 static int acpi_cmbat_ioctl(u_long, caddr_t, void *); 94 static int acpi_cmbat_is_bst_valid(struct acpi_bst*); 95 static int acpi_cmbat_is_bif_valid(struct acpi_bif*); 96 static int acpi_cmbat_get_total_battinfo(struct acpi_battinfo *); 97 static void acpi_cmbat_init_battery(void *); 98 99 static device_method_t acpi_cmbat_methods[] = { 100 /* Device interface */ 101 DEVMETHOD(device_probe, acpi_cmbat_probe), 102 DEVMETHOD(device_attach, acpi_cmbat_attach), 103 DEVMETHOD(device_detach, acpi_cmbat_detach), 104 DEVMETHOD(device_resume, acpi_cmbat_resume), 105 106 {0, 0} 107 }; 108 109 static driver_t acpi_cmbat_driver = { 110 "acpi_cmbat", 111 acpi_cmbat_methods, 112 sizeof(struct acpi_cmbat_softc), 113 }; 114 115 static devclass_t acpi_cmbat_devclass; 116 DRIVER_MODULE(acpi_cmbat, acpi, acpi_cmbat_driver, acpi_cmbat_devclass, 0, 0); 117 MODULE_DEPEND(acpi_cmbat, acpi, 1, 1, 1); 118 119 static int 120 acpi_cmbat_info_expired(struct timespec *lastupdated) 121 { 122 struct timespec curtime; 123 124 if (lastupdated == NULL) 125 return (1); 126 if (!timespecisset(lastupdated)) 127 return (1); 128 129 getnanotime(&curtime); 130 timespecsub(&curtime, lastupdated); 131 return (curtime.tv_sec < 0 || 132 curtime.tv_sec > acpi_battery_get_info_expire()); 133 } 134 135 136 static void 137 acpi_cmbat_info_updated(struct timespec *lastupdated) 138 { 139 if (lastupdated != NULL) 140 getnanotime(lastupdated); 141 } 142 143 static void 144 acpi_cmbat_get_bst(void *context) 145 { 146 device_t dev; 147 struct acpi_cmbat_softc *sc; 148 ACPI_STATUS as; 149 ACPI_OBJECT *res; 150 ACPI_HANDLE h; 151 ACPI_BUFFER bst_buffer; 152 153 dev = context; 154 sc = device_get_softc(dev); 155 h = acpi_get_handle(dev); 156 157 if (!acpi_cmbat_info_expired(&sc->bst_lastupdated)) 158 return; 159 if (sc->bst_updating) 160 return; 161 sc->bst_updating = 1; 162 163 bst_buffer.Pointer = NULL; 164 bst_buffer.Length = ACPI_ALLOCATE_BUFFER; 165 as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer); 166 if (ACPI_FAILURE(as)) { 167 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 168 "error fetching current battery status -- %s\n", 169 AcpiFormatException(as)); 170 goto end; 171 } 172 173 res = (ACPI_OBJECT *)bst_buffer.Pointer; 174 if (!ACPI_PKG_VALID(res, 4)) { 175 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 176 "battery status corrupted\n"); 177 goto end; 178 } 179 180 if (acpi_PkgInt32(res, 0, &sc->bst.state) != 0) 181 goto end; 182 if (acpi_PkgInt32(res, 1, &sc->bst.rate) != 0) 183 goto end; 184 if (acpi_PkgInt32(res, 2, &sc->bst.cap) != 0) 185 goto end; 186 if (acpi_PkgInt32(res, 3, &sc->bst.volt) != 0) 187 goto end; 188 acpi_cmbat_info_updated(&sc->bst_lastupdated); 189 190 end: 191 if (bst_buffer.Pointer != NULL) 192 AcpiOsFree(bst_buffer.Pointer); 193 sc->bst_updating = 0; 194 } 195 196 static void 197 acpi_cmbat_get_bif(void *context) 198 { 199 device_t dev; 200 struct acpi_cmbat_softc *sc; 201 ACPI_STATUS as; 202 ACPI_OBJECT *res; 203 ACPI_HANDLE h; 204 ACPI_BUFFER bif_buffer; 205 206 dev = context; 207 sc = device_get_softc(dev); 208 h = acpi_get_handle(dev); 209 210 if (!acpi_cmbat_info_expired(&sc->bif_lastupdated)) 211 return; 212 if (sc->bif_updating) 213 return; 214 sc->bif_updating = 1; 215 216 bif_buffer.Pointer = NULL; 217 bif_buffer.Length = ACPI_ALLOCATE_BUFFER; 218 as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer); 219 if (ACPI_FAILURE(as)) { 220 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 221 "error fetching current battery info -- %s\n", 222 AcpiFormatException(as)); 223 goto end; 224 } 225 226 res = (ACPI_OBJECT *)bif_buffer.Pointer; 227 if (!ACPI_PKG_VALID(res, 13)) { 228 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 229 "battery info corrupted\n"); 230 goto end; 231 } 232 233 if (acpi_PkgInt32(res, 0, &sc->bif.units) != 0) 234 goto end; 235 if (acpi_PkgInt32(res, 1, &sc->bif.dcap) != 0) 236 goto end; 237 if (acpi_PkgInt32(res, 2, &sc->bif.lfcap) != 0) 238 goto end; 239 if (acpi_PkgInt32(res, 3, &sc->bif.btech) != 0) 240 goto end; 241 if (acpi_PkgInt32(res, 4, &sc->bif.dvol) != 0) 242 goto end; 243 if (acpi_PkgInt32(res, 5, &sc->bif.wcap) != 0) 244 goto end; 245 if (acpi_PkgInt32(res, 6, &sc->bif.lcap) != 0) 246 goto end; 247 if (acpi_PkgInt32(res, 7, &sc->bif.gra1) != 0) 248 goto end; 249 if (acpi_PkgInt32(res, 8, &sc->bif.gra2) != 0) 250 goto end; 251 if (acpi_PkgStr(res, 9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN) != 0) 252 goto end; 253 if (acpi_PkgStr(res, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN) != 0) 254 goto end; 255 if (acpi_PkgStr(res, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN) != 0) 256 goto end; 257 if (acpi_PkgStr(res, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN) != 0) 258 goto end; 259 acpi_cmbat_info_updated(&sc->bif_lastupdated); 260 261 end: 262 if (bif_buffer.Pointer != NULL) 263 AcpiOsFree(bif_buffer.Pointer); 264 sc->bif_updating = 0; 265 } 266 267 static void 268 acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 269 { 270 device_t dev; 271 struct acpi_cmbat_softc *sc; 272 273 dev = (device_t)context; 274 if ((sc = device_get_softc(dev)) == NULL) 275 return; 276 277 acpi_UserNotify("CMBAT", h, notify); 278 279 switch (notify) { 280 case ACPI_NOTIFY_DEVICE_CHECK: 281 case ACPI_BATTERY_BST_CHANGE: 282 timespecclear(&sc->bst_lastupdated); 283 break; 284 case ACPI_NOTIFY_BUS_CHECK: 285 case ACPI_BATTERY_BIF_CHANGE: 286 timespecclear(&sc->bif_lastupdated); 287 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_get_bif, dev); 288 break; 289 default: 290 break; 291 } 292 } 293 294 static int 295 acpi_cmbat_probe(device_t dev) 296 { 297 static char *cmbat_ids[] = { "PNP0C0A", NULL }; 298 299 if (acpi_disabled("cmbat") || 300 ACPI_ID_PROBE(device_get_parent(dev), dev, cmbat_ids) == NULL) 301 return (ENXIO); 302 303 device_set_desc(dev, "Control Method Battery"); 304 return (0); 305 } 306 307 static int 308 acpi_cmbat_attach(device_t dev) 309 { 310 int error; 311 ACPI_HANDLE handle; 312 struct acpi_cmbat_softc *sc; 313 314 if ((sc = device_get_softc(dev)) == NULL) 315 return (ENXIO); 316 317 handle = acpi_get_handle(dev); 318 319 /* 320 * Install a system notify handler in addition to the device notify. 321 * Toshiba notebook uses this alternate notify for its battery. 322 */ 323 AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY, 324 acpi_cmbat_notify_handler, dev); 325 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY, 326 acpi_cmbat_notify_handler, dev); 327 328 sc->bif_updating = sc->bst_updating = 0; 329 sc->dev = dev; 330 331 timespecclear(&sc->bif_lastupdated); 332 timespecclear(&sc->bst_lastupdated); 333 334 if (acpi_cmbat_units == 0) { 335 error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BIF, 336 acpi_cmbat_ioctl, NULL); 337 if (error != 0) 338 return (error); 339 error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BST, 340 acpi_cmbat_ioctl, NULL); 341 if (error != 0) 342 return (error); 343 } 344 345 sc->phys_unit = acpi_cmbat_units; 346 error = acpi_battery_register(ACPI_BATT_TYPE_CMBAT, sc->phys_unit); 347 if (error != 0) 348 return (error); 349 350 acpi_cmbat_units++; 351 timespecclear(&acpi_cmbat_info_lastupdated); 352 sc->initializing = 0; 353 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_init_battery, dev); 354 355 return (0); 356 } 357 358 static int 359 acpi_cmbat_detach(device_t dev) 360 { 361 struct acpi_cmbat_softc *sc; 362 363 sc = device_get_softc(dev); 364 acpi_battery_remove(ACPI_BATT_TYPE_CMBAT, sc->phys_unit); 365 acpi_cmbat_units--; 366 return (0); 367 } 368 369 static int 370 acpi_cmbat_resume(device_t dev) 371 { 372 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_init_battery, dev); 373 return (0); 374 } 375 376 static int 377 acpi_cmbat_ioctl(u_long cmd, caddr_t addr, void *arg) 378 { 379 device_t dev; 380 union acpi_battery_ioctl_arg *ioctl_arg; 381 struct acpi_cmbat_softc *sc; 382 struct acpi_bif *bifp; 383 struct acpi_bst *bstp; 384 385 ioctl_arg = (union acpi_battery_ioctl_arg *)addr; 386 dev = devclass_get_device(acpi_cmbat_devclass, ioctl_arg->unit); 387 if (dev == NULL) 388 return (ENXIO); 389 sc = device_get_softc(dev); 390 if (sc == NULL) 391 return (ENXIO); 392 393 /* 394 * No security check required: information retrieval only. If 395 * new functions are added here, a check might be required. 396 */ 397 switch (cmd) { 398 case ACPIIO_CMBAT_GET_BIF: 399 acpi_cmbat_get_bif(dev); 400 bifp = &ioctl_arg->bif; 401 bifp->units = sc->bif.units; 402 bifp->dcap = sc->bif.dcap; 403 bifp->lfcap = sc->bif.lfcap; 404 bifp->btech = sc->bif.btech; 405 bifp->dvol = sc->bif.dvol; 406 bifp->wcap = sc->bif.wcap; 407 bifp->lcap = sc->bif.lcap; 408 bifp->gra1 = sc->bif.gra1; 409 bifp->gra2 = sc->bif.gra2; 410 strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model)); 411 strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial)); 412 strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type)); 413 strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo)); 414 break; 415 case ACPIIO_CMBAT_GET_BST: 416 bstp = &ioctl_arg->bst; 417 if (acpi_BatteryIsPresent(dev)) { 418 acpi_cmbat_get_bst(dev); 419 bstp->state = sc->bst.state; 420 bstp->rate = sc->bst.rate; 421 bstp->cap = sc->bst.cap; 422 bstp->volt = sc->bst.volt; 423 } else { 424 bstp->state = ACPI_BATT_STAT_NOT_PRESENT; 425 } 426 break; 427 default: 428 break; 429 } 430 431 return (0); 432 } 433 434 static int 435 acpi_cmbat_is_bst_valid(struct acpi_bst *bst) 436 { 437 if (bst->state >= ACPI_BATT_STAT_MAX || bst->cap == 0xffffffff || 438 bst->volt == 0xffffffff) 439 440 return (0); 441 else 442 return (1); 443 } 444 445 static int 446 acpi_cmbat_is_bif_valid(struct acpi_bif *bif) 447 { 448 if (bif->lfcap == 0) 449 return (0); 450 else 451 return (1); 452 } 453 454 static int 455 acpi_cmbat_get_total_battinfo(struct acpi_battinfo *battinfo) 456 { 457 int i; 458 int error; 459 int batt_stat; 460 int valid_rate, valid_units; 461 int cap, min; 462 int total_cap, total_min, total_full; 463 device_t dev; 464 struct acpi_cmbat_softc *sc; 465 static int bat_units = 0; 466 static struct acpi_cmbat_softc **bat = NULL; 467 468 cap = min = -1; 469 batt_stat = ACPI_BATT_STAT_NOT_PRESENT; 470 error = 0; 471 472 /* Allocate array of softc pointers */ 473 if (bat_units != acpi_cmbat_units) { 474 if (bat != NULL) { 475 free(bat, M_ACPICMBAT); 476 bat = NULL; 477 } 478 bat_units = 0; 479 } 480 if (bat == NULL) { 481 bat_units = acpi_cmbat_units; 482 bat = malloc(sizeof(struct acpi_cmbat_softc *) * bat_units, 483 M_ACPICMBAT, M_NOWAIT); 484 if (bat == NULL) { 485 error = ENOMEM; 486 goto out; 487 } 488 489 /* Collect softc pointers */ 490 for (i = 0; i < acpi_cmbat_units; i++) { 491 if ((dev = devclass_get_device(acpi_cmbat_devclass, i)) == NULL) { 492 error = ENXIO; 493 goto out; 494 } 495 if ((sc = device_get_softc(dev)) == NULL) { 496 error = ENXIO; 497 goto out; 498 } 499 bat[i] = sc; 500 } 501 } 502 503 /* Get battery status, valid rate and valid units */ 504 batt_stat = valid_rate = valid_units = 0; 505 for (i = 0; i < acpi_cmbat_units; i++) { 506 bat[i]->present = acpi_BatteryIsPresent(bat[i]->dev); 507 if (!bat[i]->present) 508 continue; 509 510 acpi_cmbat_get_bst(bat[i]->dev); 511 512 /* If battery not installed, we get strange values */ 513 if (!acpi_cmbat_is_bst_valid(&(bat[i]->bst)) || 514 !acpi_cmbat_is_bif_valid(&(bat[i]->bif))) { 515 516 bat[i]->present = 0; 517 continue; 518 } 519 520 valid_units++; 521 bat[i]->cap = 100 * bat[i]->bst.cap / bat[i]->bif.lfcap; 522 batt_stat |= bat[i]->bst.state; 523 524 if (bat[i]->bst.rate > 0) { 525 /* 526 * XXX Hack to calculate total battery time. 527 * Systems with 2 or more battries, they may get used 528 * one by one, thus bst.rate is set only to the one 529 * in use. For remaining batteries bst.rate = 0, which 530 * makes it impossible to calculate remaining time. 531 * Some other systems may need sum of bst.rate in 532 * dis-charging state. 533 * There for we sum up the bst.rate that is valid 534 * (in dis-charging state), and use the sum to 535 * calcutate remaining batteries' time. 536 */ 537 if (bat[i]->bst.state & ACPI_BATT_STAT_DISCHARG) 538 valid_rate += bat[i]->bst.rate; 539 } 540 } 541 542 /* Calculate total battery capacity and time */ 543 total_cap = total_min = total_full = 0; 544 for (i = 0; i < acpi_cmbat_units; i++) { 545 if (!bat[i]->present) 546 continue; 547 548 if (valid_rate > 0) { 549 /* Use the sum of bst.rate */ 550 bat[i]->min = 60 * bat[i]->bst.cap / valid_rate; 551 } else if (bat[i]->full_charge_time > 0) { 552 bat[i]->min = (bat[i]->full_charge_time * bat[i]->cap) / 100; 553 } else { 554 /* Couldn't find valid rate and full battery time */ 555 bat[i]->min = 0; 556 } 557 total_min += bat[i]->min; 558 total_cap += bat[i]->cap; 559 total_full += bat[i]->full_charge_time; 560 } 561 562 /* Battery life */ 563 if (valid_units == 0) { 564 cap = -1; 565 batt_stat = ACPI_BATT_STAT_NOT_PRESENT; 566 } else { 567 cap = total_cap / valid_units; 568 } 569 570 /* Battery time */ 571 if (valid_units == 0) { 572 min = -1; 573 } else if (valid_rate == 0 || (batt_stat & ACPI_BATT_STAT_CHARGING)) { 574 if (total_full == 0) 575 min = -1; 576 else 577 min = (total_full * cap) / 100; 578 } else { 579 min = total_min; 580 } 581 acpi_cmbat_info_updated(&acpi_cmbat_info_lastupdated); 582 583 out: 584 battinfo->cap = cap; 585 battinfo->min = min; 586 battinfo->state = batt_stat; 587 588 return (error); 589 } 590 591 static void 592 acpi_cmbat_init_battery(void *arg) 593 { 594 int retry; 595 device_t dev = (device_t)arg; 596 struct acpi_cmbat_softc *sc = device_get_softc(dev); 597 598 if (sc->initializing) 599 return; 600 601 sc->initializing = 1; 602 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 603 "battery initialization start\n"); 604 605 for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10, 0)) { 606 sc->present = acpi_BatteryIsPresent(dev); 607 if (!sc->present) 608 continue; 609 610 timespecclear(&sc->bst_lastupdated); 611 timespecclear(&sc->bif_lastupdated); 612 613 acpi_cmbat_get_bst(dev); 614 if (!acpi_cmbat_is_bst_valid(&sc->bst)) 615 continue; 616 617 acpi_cmbat_get_bif(dev); 618 if (!acpi_cmbat_is_bif_valid(&sc->bif)) 619 continue; 620 break; 621 } 622 623 sc->initializing = 0; 624 if (retry == ACPI_CMBAT_RETRY_MAX) { 625 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 626 "battery initialization failed, giving up\n"); 627 } else { 628 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 629 "battery initialization done, tried %d times\n", retry + 1); 630 } 631 } 632 633 /* 634 * Public interfaces. 635 */ 636 int 637 acpi_cmbat_get_battinfo(int unit, struct acpi_battinfo *battinfo) 638 { 639 int error; 640 device_t dev; 641 struct acpi_cmbat_softc *sc; 642 643 if (unit == -1) 644 return (acpi_cmbat_get_total_battinfo(battinfo)); 645 646 if (acpi_cmbat_info_expired(&acpi_cmbat_info_lastupdated)) { 647 error = acpi_cmbat_get_total_battinfo(battinfo); 648 if (error) 649 goto out; 650 } 651 652 error = 0; 653 if (unit >= acpi_cmbat_units) { 654 error = ENXIO; 655 goto out; 656 } 657 658 if ((dev = devclass_get_device(acpi_cmbat_devclass, unit)) == NULL) { 659 error = ENXIO; 660 goto out; 661 } 662 if ((sc = device_get_softc(dev)) == NULL) { 663 error = ENXIO; 664 goto out; 665 } 666 667 if (!sc->present) { 668 battinfo->cap = -1; 669 battinfo->min = -1; 670 battinfo->state = ACPI_BATT_STAT_NOT_PRESENT; 671 } else { 672 battinfo->cap = sc->cap; 673 battinfo->min = sc->min; 674 battinfo->state = sc->bst.state; 675 } 676 677 out: 678 return (error); 679 } 680