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: src/sys/dev/acpica/acpi_cmbat.c,v 1.22.2.1 2003/08/22 20:49:20 jhb Exp $ 29 * $DragonFly: src/sys/dev/acpica/Attic/acpi_cmbat.c,v 1.2 2004/05/05 22:19:23 dillon Exp $ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/ioccom.h> 37 #include <sys/conf.h> 38 39 #include <machine/bus.h> 40 #include <machine/resource.h> 41 #include <sys/rman.h> 42 #include <sys/malloc.h> 43 44 #include "acpi.h" 45 46 #include <dev/acpica/acpivar.h> 47 #include <dev/acpica/acpiio.h> 48 49 MALLOC_DEFINE(M_ACPICMBAT, "acpicmbat", "ACPI control method battery data"); 50 51 #define CMBAT_POLLRATE (60 * hz) 52 53 /* 54 * Hooks for the ACPI CA debugging infrastructure 55 */ 56 #define _COMPONENT ACPI_BATTERY 57 ACPI_MODULE_NAME("BATTERY") 58 59 #define ACPI_BATTERY_BST_CHANGE 0x80 60 #define ACPI_BATTERY_BIF_CHANGE 0x81 61 62 #define PKG_GETINT(res, tmp, idx, dest, label) do { \ 63 tmp = &res->Package.Elements[idx]; \ 64 if (tmp == NULL) { \ 65 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), \ 66 "%s: PKG_GETINT error, idx = %d\n.", __func__, idx); \ 67 goto label; \ 68 } \ 69 if (tmp->Type != ACPI_TYPE_INTEGER) \ 70 goto label; \ 71 dest = tmp->Integer.Value; \ 72 } while (0) 73 74 #define PKG_GETSTR(res, tmp, idx, dest, size, label) do { \ 75 size_t length; \ 76 length = size; \ 77 tmp = &res->Package.Elements[idx]; \ 78 if (tmp == NULL) { \ 79 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), \ 80 "%s: PKG_GETSTR error, idx = %d\n.", __func__, idx); \ 81 goto label; \ 82 } \ 83 bzero(dest, sizeof(dest)); \ 84 switch (tmp->Type) { \ 85 case ACPI_TYPE_STRING: \ 86 if (tmp->String.Length < length) { \ 87 length = tmp->String.Length; \ 88 } \ 89 strncpy(dest, tmp->String.Pointer, length); \ 90 break; \ 91 case ACPI_TYPE_BUFFER: \ 92 if (tmp->Buffer.Length < length) { \ 93 length = tmp->Buffer.Length; \ 94 } \ 95 strncpy(dest, tmp->Buffer.Pointer, length); \ 96 break; \ 97 default: \ 98 goto label; \ 99 } \ 100 dest[sizeof(dest)-1] = '\0'; \ 101 } while (0) 102 103 struct acpi_cmbat_softc { 104 device_t dev; 105 106 struct acpi_bif bif; 107 struct acpi_bst bst; 108 struct timespec bif_lastupdated; 109 struct timespec bst_lastupdated; 110 int bif_updating; 111 int bst_updating; 112 113 int present; 114 int cap; 115 int min; 116 int full_charge_time; 117 int initializing; 118 }; 119 120 static struct timespec acpi_cmbat_info_lastupdated; 121 122 /* XXX: devclass_get_maxunit() don't give us the current allocated units... */ 123 static int acpi_cmbat_units = 0; 124 125 static int acpi_cmbat_info_expired(struct timespec *); 126 static void acpi_cmbat_info_updated(struct timespec *); 127 static void acpi_cmbat_get_bst(void *); 128 static void acpi_cmbat_get_bif(void *); 129 static void acpi_cmbat_notify_handler(ACPI_HANDLE, UINT32, void *); 130 static int acpi_cmbat_probe(device_t); 131 static int acpi_cmbat_attach(device_t); 132 static int acpi_cmbat_resume(device_t); 133 static int acpi_cmbat_ioctl(u_long, caddr_t, void *); 134 static int acpi_cmbat_is_bst_valid(struct acpi_bst*); 135 static int acpi_cmbat_is_bif_valid(struct acpi_bif*); 136 static int acpi_cmbat_get_total_battinfo(struct acpi_battinfo *); 137 static void acpi_cmbat_init_battery(void *); 138 139 static __inline int 140 acpi_cmbat_info_expired(struct timespec *lastupdated) 141 { 142 struct timespec curtime; 143 144 if (lastupdated == NULL) { 145 return (1); 146 } 147 148 if (!timespecisset(lastupdated)) { 149 return (1); 150 } 151 152 getnanotime(&curtime); 153 timespecsub(&curtime, lastupdated); 154 return ((curtime.tv_sec < 0 || curtime.tv_sec > acpi_battery_get_info_expire())); 155 } 156 157 158 static __inline void 159 acpi_cmbat_info_updated(struct timespec *lastupdated) 160 { 161 162 if (lastupdated != NULL) { 163 getnanotime(lastupdated); 164 } 165 } 166 167 static void 168 acpi_cmbat_get_bst(void *context) 169 { 170 device_t dev; 171 struct acpi_cmbat_softc *sc; 172 ACPI_STATUS as; 173 ACPI_OBJECT *res, *tmp; 174 ACPI_HANDLE h; 175 ACPI_BUFFER bst_buffer; 176 177 dev = context; 178 sc = device_get_softc(dev); 179 h = acpi_get_handle(dev); 180 bst_buffer.Pointer = NULL; 181 182 if (!acpi_cmbat_info_expired(&sc->bst_lastupdated)) { 183 return; 184 } 185 186 if (sc->bst_updating) { 187 return; 188 } 189 sc->bst_updating = 1; 190 191 bst_buffer.Length = ACPI_ALLOCATE_BUFFER; 192 if (ACPI_FAILURE(as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer))) { 193 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 194 "error fetching current battery status -- %s\n", 195 AcpiFormatException(as)); 196 goto end; 197 } 198 199 res = (ACPI_OBJECT *)bst_buffer.Pointer; 200 201 if ((res == NULL) || (res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count != 4)) { 202 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 203 "battery status corrupted\n"); 204 goto end; 205 } 206 207 PKG_GETINT(res, tmp, 0, sc->bst.state, end); 208 PKG_GETINT(res, tmp, 1, sc->bst.rate, end); 209 PKG_GETINT(res, tmp, 2, sc->bst.cap, end); 210 PKG_GETINT(res, tmp, 3, sc->bst.volt, end); 211 acpi_cmbat_info_updated(&sc->bst_lastupdated); 212 end: 213 if (bst_buffer.Pointer != NULL) 214 AcpiOsFree(bst_buffer.Pointer); 215 sc->bst_updating = 0; 216 } 217 218 static void 219 acpi_cmbat_get_bif(void *context) 220 { 221 device_t dev; 222 struct acpi_cmbat_softc *sc; 223 ACPI_STATUS as; 224 ACPI_OBJECT *res, *tmp; 225 ACPI_HANDLE h; 226 ACPI_BUFFER bif_buffer; 227 228 dev = context; 229 sc = device_get_softc(dev); 230 h = acpi_get_handle(dev); 231 bif_buffer.Pointer = NULL; 232 233 if (!acpi_cmbat_info_expired(&sc->bif_lastupdated)) { 234 return; 235 } 236 237 if (sc->bif_updating) { 238 return; 239 } 240 sc->bif_updating = 1; 241 242 bif_buffer.Length = ACPI_ALLOCATE_BUFFER; 243 if (ACPI_FAILURE(as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer))) { 244 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 245 "error fetching current battery info -- %s\n", 246 AcpiFormatException(as)); 247 goto end; 248 } 249 250 res = (ACPI_OBJECT *)bif_buffer.Pointer; 251 252 if ((res == NULL) || (res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count != 13)) { 253 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 254 "battery info corrupted\n"); 255 goto end; 256 } 257 258 PKG_GETINT(res, tmp, 0, sc->bif.unit, end); 259 PKG_GETINT(res, tmp, 1, sc->bif.dcap, end); 260 PKG_GETINT(res, tmp, 2, sc->bif.lfcap, end); 261 PKG_GETINT(res, tmp, 3, sc->bif.btech, end); 262 PKG_GETINT(res, tmp, 4, sc->bif.dvol, end); 263 PKG_GETINT(res, tmp, 5, sc->bif.wcap, end); 264 PKG_GETINT(res, tmp, 6, sc->bif.lcap, end); 265 PKG_GETINT(res, tmp, 7, sc->bif.gra1, end); 266 PKG_GETINT(res, tmp, 8, sc->bif.gra2, end); 267 PKG_GETSTR(res, tmp, 9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN, end); 268 PKG_GETSTR(res, tmp, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN, end); 269 PKG_GETSTR(res, tmp, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN, end); 270 PKG_GETSTR(res, tmp, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN, end); 271 acpi_cmbat_info_updated(&sc->bif_lastupdated); 272 end: 273 if (bif_buffer.Pointer != NULL) 274 AcpiOsFree(bif_buffer.Pointer); 275 sc->bif_updating = 0; 276 } 277 278 static void 279 acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 280 { 281 device_t dev; 282 struct acpi_cmbat_softc *sc; 283 284 dev = (device_t)context; 285 if ((sc = device_get_softc(dev)) == NULL) { 286 return; 287 } 288 289 switch (notify) { 290 case ACPI_BATTERY_BST_CHANGE: 291 timespecclear(&sc->bst_lastupdated); 292 break; 293 case ACPI_BATTERY_BIF_CHANGE: 294 timespecclear(&sc->bif_lastupdated); 295 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_get_bif, dev); 296 break; 297 default: 298 break; 299 } 300 } 301 302 static int 303 acpi_cmbat_probe(device_t dev) 304 { 305 306 if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && 307 !acpi_disabled("cmbat") && 308 acpi_MatchHid(dev, "PNP0C0A")) { 309 /* 310 * Set device description. 311 */ 312 device_set_desc(dev, "Control method Battery"); 313 return (0); 314 } 315 return (ENXIO); 316 } 317 318 static int 319 acpi_cmbat_attach(device_t dev) 320 { 321 int error; 322 ACPI_HANDLE handle; 323 struct acpi_cmbat_softc *sc; 324 325 if ((sc = device_get_softc(dev)) == NULL) { 326 return (ENXIO); 327 } 328 329 handle = acpi_get_handle(dev); 330 331 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY, 332 acpi_cmbat_notify_handler, dev); 333 334 sc->bif_updating = sc->bst_updating = 0; 335 sc->dev = dev; 336 337 timespecclear(&sc->bif_lastupdated); 338 timespecclear(&sc->bst_lastupdated); 339 340 if (acpi_cmbat_units == 0) { 341 if ((error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BIF, 342 acpi_cmbat_ioctl, NULL)) != 0) { 343 return (error); 344 } 345 if ((error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BST, 346 acpi_cmbat_ioctl, NULL)) != 0) { 347 return (error); 348 } 349 } 350 351 if ((error = acpi_battery_register(ACPI_BATT_TYPE_CMBAT, 352 acpi_cmbat_units)) != 0) { 353 return (error); 354 } 355 356 acpi_cmbat_units++; 357 timespecclear(&acpi_cmbat_info_lastupdated); 358 sc->initializing = 0; 359 360 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_init_battery, dev); 361 return (0); 362 } 363 364 static int 365 acpi_cmbat_resume(device_t dev) 366 { 367 368 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_init_battery, dev); 369 return (0); 370 } 371 372 static device_method_t acpi_cmbat_methods[] = { 373 /* Device interface */ 374 DEVMETHOD(device_probe, acpi_cmbat_probe), 375 DEVMETHOD(device_attach, acpi_cmbat_attach), 376 DEVMETHOD(device_resume, acpi_cmbat_resume), 377 378 {0, 0} 379 }; 380 381 static driver_t acpi_cmbat_driver = { 382 "acpi_cmbat", 383 acpi_cmbat_methods, 384 sizeof(struct acpi_cmbat_softc), 385 }; 386 387 static devclass_t acpi_cmbat_devclass; 388 DRIVER_MODULE(acpi_cmbat, acpi, acpi_cmbat_driver, acpi_cmbat_devclass, 0, 0); 389 390 static int 391 acpi_cmbat_ioctl(u_long cmd, caddr_t addr, void *arg) 392 { 393 device_t dev; 394 union acpi_battery_ioctl_arg *ioctl_arg; 395 struct acpi_cmbat_softc *sc; 396 struct acpi_bif *bifp; 397 struct acpi_bst *bstp; 398 399 ioctl_arg = (union acpi_battery_ioctl_arg *)addr; 400 if ((dev = devclass_get_device(acpi_cmbat_devclass, 401 ioctl_arg->unit)) == NULL) { 402 return (ENXIO); 403 } 404 405 if ((sc = device_get_softc(dev)) == NULL) { 406 return (ENXIO); 407 } 408 409 /* 410 * No security check required: information retrieval only. If 411 * new functions are added here, a check might be required. 412 */ 413 414 switch (cmd) { 415 case ACPIIO_CMBAT_GET_BIF: 416 acpi_cmbat_get_bif(dev); 417 bifp = &ioctl_arg->bif; 418 bifp->unit = sc->bif.unit; 419 bifp->dcap = sc->bif.dcap; 420 bifp->lfcap = sc->bif.lfcap; 421 bifp->btech = sc->bif.btech; 422 bifp->dvol = sc->bif.dvol; 423 bifp->wcap = sc->bif.wcap; 424 bifp->lcap = sc->bif.lcap; 425 bifp->gra1 = sc->bif.gra1; 426 bifp->gra2 = sc->bif.gra2; 427 strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model)); 428 strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial)); 429 strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type)); 430 strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo)); 431 break; 432 433 case ACPIIO_CMBAT_GET_BST: 434 bstp = &ioctl_arg->bst; 435 if (acpi_BatteryIsPresent(dev)) { 436 acpi_cmbat_get_bst(dev); 437 bstp->state = sc->bst.state; 438 bstp->rate = sc->bst.rate; 439 bstp->cap = sc->bst.cap; 440 bstp->volt = sc->bst.volt; 441 } else 442 bstp->state = ACPI_BATT_STAT_NOT_PRESENT; 443 break; 444 } 445 446 return (0); 447 } 448 449 static __inline int 450 acpi_cmbat_is_bst_valid(struct acpi_bst *bst) 451 { 452 if (bst->state >= ACPI_BATT_STAT_MAX || 453 bst->cap == 0xffffffff || 454 bst->volt == 0xffffffff) { 455 return (0); 456 } 457 458 return (1); 459 } 460 461 static __inline int 462 acpi_cmbat_is_bif_valid(struct acpi_bif *bif) 463 { 464 if (bif->lfcap == 0) { 465 return (0); 466 } 467 468 return (1); 469 } 470 471 static int 472 acpi_cmbat_get_total_battinfo(struct acpi_battinfo *battinfo) 473 { 474 int i; 475 int error; 476 int batt_stat; 477 int valid_rate, valid_units; 478 int cap, min; 479 int total_cap, total_min, total_full; 480 device_t dev; 481 struct acpi_cmbat_softc *sc; 482 static int bat_units = 0; 483 static struct acpi_cmbat_softc **bat = NULL; 484 485 cap = min = -1; 486 batt_stat = ACPI_BATT_STAT_NOT_PRESENT; 487 error = 0; 488 489 /* Allocate array of softc pointers */ 490 if (bat_units != acpi_cmbat_units) { 491 if (bat != NULL) { 492 free(bat, M_ACPICMBAT); 493 bat = NULL; 494 } 495 bat_units = 0; 496 } 497 if (bat == NULL) { 498 bat_units = acpi_cmbat_units; 499 bat = malloc(sizeof(struct acpi_cmbat_softc *) * bat_units, 500 M_ACPICMBAT, M_INTWAIT); 501 502 /* Collect softc pointers */ 503 for (i = 0; i < acpi_cmbat_units; i++) { 504 if ((dev = devclass_get_device(acpi_cmbat_devclass, i)) == NULL) { 505 error = ENXIO; 506 goto out; 507 } 508 509 if ((sc = device_get_softc(dev)) == NULL) { 510 error = ENXIO; 511 goto out; 512 } 513 514 bat[i] = sc; 515 } 516 } 517 518 /* Get battery status, valid rate and valid units */ 519 batt_stat = valid_rate = valid_units = 0; 520 for (i = 0; i < acpi_cmbat_units; i++) { 521 bat[i]->present = acpi_BatteryIsPresent(bat[i]->dev); 522 if (!bat[i]->present) 523 continue; 524 525 acpi_cmbat_get_bst(bat[i]->dev); 526 527 /* If battey not installed, we get strange values */ 528 if (!acpi_cmbat_is_bst_valid(&(bat[i]->bst)) || 529 !acpi_cmbat_is_bif_valid(&(bat[i]->bif))) { 530 bat[i]->present = 0; 531 continue; 532 } 533 534 valid_units++; 535 536 bat[i]->cap = 100 * bat[i]->bst.cap / bat[i]->bif.lfcap; 537 538 batt_stat |= bat[i]->bst.state; 539 540 if (bat[i]->bst.rate > 0) { 541 /* 542 * XXX Hack to calculate total battery time. 543 * Systems with 2 or more battries, they may get used 544 * one by one, thus bst.rate is set only to the one 545 * in use. For remaining batteries bst.rate = 0, which 546 * makes it impossible to calculate remaining time. 547 * Some other systems may need sum of bst.rate in 548 * dis-charging state. 549 * There for we sum up the bst.rate that is valid 550 * (in dis-charging state), and use the sum to 551 * calcutate remaining batteries' time. 552 */ 553 if (bat[i]->bst.state & ACPI_BATT_STAT_DISCHARG) { 554 valid_rate += bat[i]->bst.rate; 555 } 556 } 557 } 558 559 /* Calculate total battery capacity and time */ 560 total_cap = total_min = total_full = 0; 561 for (i = 0; i < acpi_cmbat_units; i++) { 562 if (!bat[i]->present) { 563 continue; 564 } 565 566 if (valid_rate > 0) { 567 /* Use the sum of bst.rate */ 568 bat[i]->min = 60 * bat[i]->bst.cap / valid_rate; 569 } else if (bat[i]->full_charge_time > 0) { 570 bat[i]->min = (bat[i]->full_charge_time * bat[i]->cap) / 100; 571 } else { 572 /* Couldn't find valid rate and full battery time */ 573 bat[i]->min = 0; 574 } 575 total_min += bat[i]->min; 576 total_cap += bat[i]->cap; 577 total_full += bat[i]->full_charge_time; 578 } 579 580 /* Battery life */ 581 if (valid_units == 0) { 582 cap = -1; 583 batt_stat = ACPI_BATT_STAT_NOT_PRESENT; 584 } else { 585 cap = total_cap / valid_units; 586 } 587 588 /* Battery time */ 589 if (valid_units == 0) { 590 min = -1; 591 } else if (valid_rate == 0 || (batt_stat & ACPI_BATT_STAT_CHARGING)) { 592 if (total_full == 0) { 593 min = -1; 594 } else { 595 min = (total_full * cap) / 100; 596 } 597 } else { 598 min = total_min; 599 } 600 601 acpi_cmbat_info_updated(&acpi_cmbat_info_lastupdated); 602 out: 603 battinfo->cap = cap; 604 battinfo->min = min; 605 battinfo->state = batt_stat; 606 607 return (error); 608 } 609 610 static void 611 acpi_cmbat_init_battery(void *arg) 612 { 613 int retry; 614 device_t dev = (device_t)arg; 615 struct acpi_cmbat_softc *sc = device_get_softc(dev); 616 #define ACPI_CMBAT_RETRY_MAX 6 617 618 if (sc->initializing) { 619 return; 620 } 621 622 sc->initializing = 1; 623 624 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 625 "battery initialization start\n"); 626 627 for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10, 0)) { 628 sc->present = acpi_BatteryIsPresent(dev); 629 if (!sc->present) { 630 continue; 631 } 632 633 timespecclear(&sc->bst_lastupdated); 634 timespecclear(&sc->bif_lastupdated); 635 636 acpi_cmbat_get_bst(dev); 637 638 if (!acpi_cmbat_is_bst_valid(&sc->bst)) { 639 continue; 640 } 641 642 acpi_cmbat_get_bif(dev); 643 644 if (!acpi_cmbat_is_bif_valid(&sc->bif)) { 645 continue; 646 } 647 648 break; 649 } 650 651 if (retry == ACPI_CMBAT_RETRY_MAX) 652 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 653 "battery initialization failed, giving up\n"); 654 else 655 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 656 "battery initialization done, tried %d times\n", 657 retry+1); 658 659 sc->initializing = 0; 660 } 661 662 /* 663 * Public interfaces. 664 */ 665 666 int 667 acpi_cmbat_get_battinfo(int unit, struct acpi_battinfo *battinfo) 668 { 669 int error; 670 device_t dev; 671 struct acpi_cmbat_softc *sc; 672 673 if (unit == -1) { 674 return (acpi_cmbat_get_total_battinfo(battinfo)); 675 } 676 677 if (acpi_cmbat_info_expired(&acpi_cmbat_info_lastupdated)) { 678 error = acpi_cmbat_get_total_battinfo(battinfo); 679 if (error) { 680 goto out; 681 } 682 } 683 684 error = 0; 685 if (unit >= acpi_cmbat_units) { 686 error = ENXIO; 687 goto out; 688 } 689 690 if ((dev = devclass_get_device(acpi_cmbat_devclass, unit)) == NULL) { 691 error = ENXIO; 692 goto out; 693 } 694 695 if ((sc = device_get_softc(dev)) == NULL) { 696 error = ENXIO; 697 goto out; 698 } 699 700 if (!sc->present) { 701 battinfo->cap = -1; 702 battinfo->min = -1; 703 battinfo->state = ACPI_BATT_STAT_NOT_PRESENT; 704 } else { 705 battinfo->cap = sc->cap; 706 battinfo->min = sc->min; 707 battinfo->state = sc->bst.state; 708 } 709 out: 710 return (error); 711 } 712 713