1 /* $NetBSD: acpi_bat.c,v 1.112 2012/08/14 14:36:43 jruoho Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum of By Noon Software, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright 2001 Bill Sommerfeld. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed for the NetBSD Project by 47 * Wasabi Systems, Inc. 48 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 49 * or promote products derived from this software without specific prior 50 * written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 54 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 55 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 56 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 57 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 58 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 59 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 60 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 61 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 62 * POSSIBILITY OF SUCH DAMAGE. 63 */ 64 65 /* 66 * ACPI Battery Driver. 67 * 68 * ACPI defines two different battery device interfaces: "Control 69 * Method" batteries, in which AML methods are defined in order to get 70 * battery status and set battery alarm thresholds, and a "Smart 71 * Battery" device, which is an SMbus device accessed through the ACPI 72 * Embedded Controller device. 73 * 74 * This driver is for the "Control Method"-style battery only. 75 */ 76 77 #include <sys/cdefs.h> 78 __KERNEL_RCSID(0, "$NetBSD: acpi_bat.c,v 1.112 2012/08/14 14:36:43 jruoho Exp $"); 79 80 #include <sys/param.h> 81 #include <sys/condvar.h> 82 #include <sys/device.h> 83 #include <sys/kernel.h> 84 #include <sys/kmem.h> 85 #include <sys/module.h> 86 #include <sys/mutex.h> 87 #include <sys/systm.h> 88 89 #include <dev/acpi/acpireg.h> 90 #include <dev/acpi/acpivar.h> 91 92 #define _COMPONENT ACPI_BAT_COMPONENT 93 ACPI_MODULE_NAME ("acpi_bat") 94 95 #define ACPI_NOTIFY_BAT_STATUS 0x80 96 #define ACPI_NOTIFY_BAT_INFO 0x81 97 98 /* 99 * Sensor indexes. 100 */ 101 enum { 102 ACPIBAT_PRESENT = 0, 103 ACPIBAT_DVOLTAGE = 1, 104 ACPIBAT_VOLTAGE = 2, 105 ACPIBAT_DCAPACITY = 3, 106 ACPIBAT_LFCCAPACITY = 4, 107 ACPIBAT_CAPACITY = 5, 108 ACPIBAT_CHARGERATE = 6, 109 ACPIBAT_DISCHARGERATE = 7, 110 ACPIBAT_CHARGING = 8, 111 ACPIBAT_CHARGE_STATE = 9, 112 ACPIBAT_COUNT = 10 113 }; 114 115 /* 116 * Battery Information, _BIF 117 * (ACPI 3.0, sec. 10.2.2.1). 118 */ 119 enum { 120 ACPIBAT_BIF_UNIT = 0, 121 ACPIBAT_BIF_DCAPACITY = 1, 122 ACPIBAT_BIF_LFCCAPACITY = 2, 123 ACPIBAT_BIF_TECHNOLOGY = 3, 124 ACPIBAT_BIF_DVOLTAGE = 4, 125 ACPIBAT_BIF_WCAPACITY = 5, 126 ACPIBAT_BIF_LCAPACITY = 6, 127 ACPIBAT_BIF_GRANULARITY1 = 7, 128 ACPIBAT_BIF_GRANULARITY2 = 8, 129 ACPIBAT_BIF_MODEL = 9, 130 ACPIBAT_BIF_SERIAL = 10, 131 ACPIBAT_BIF_TYPE = 11, 132 ACPIBAT_BIF_OEM = 12, 133 ACPIBAT_BIF_COUNT = 13 134 }; 135 136 /* 137 * Battery Status, _BST 138 * (ACPI 3.0, sec. 10.2.2.3). 139 */ 140 enum { 141 ACPIBAT_BST_STATE = 0, 142 ACPIBAT_BST_RATE = 1, 143 ACPIBAT_BST_CAPACITY = 2, 144 ACPIBAT_BST_VOLTAGE = 3, 145 ACPIBAT_BST_COUNT = 4 146 }; 147 148 struct acpibat_softc { 149 struct acpi_devnode *sc_node; 150 struct sysmon_envsys *sc_sme; 151 struct timeval sc_last; 152 envsys_data_t *sc_sensor; 153 kmutex_t sc_mutex; 154 kcondvar_t sc_condvar; 155 int32_t sc_dcapacity; 156 int32_t sc_dvoltage; 157 int32_t sc_lcapacity; 158 int32_t sc_wcapacity; 159 int sc_present; 160 }; 161 162 static const char * const bat_hid[] = { 163 "PNP0C0A", 164 NULL 165 }; 166 167 #define ACPIBAT_PWRUNIT_MA 0x00000001 /* mA not mW */ 168 #define ACPIBAT_ST_DISCHARGING 0x00000001 /* battery is discharging */ 169 #define ACPIBAT_ST_CHARGING 0x00000002 /* battery is charging */ 170 #define ACPIBAT_ST_CRITICAL 0x00000004 /* battery is critical */ 171 172 /* 173 * A value used when _BST or _BIF is temporarily unknown. 174 */ 175 #define ACPIBAT_VAL_UNKNOWN 0xFFFFFFFF 176 177 #define ACPIBAT_VAL_ISVALID(x) \ 178 (((x) != ACPIBAT_VAL_UNKNOWN) ? ENVSYS_SVALID : ENVSYS_SINVALID) 179 180 static int acpibat_match(device_t, cfdata_t, void *); 181 static void acpibat_attach(device_t, device_t, void *); 182 static int acpibat_detach(device_t, int); 183 static int acpibat_get_sta(device_t); 184 static ACPI_OBJECT *acpibat_get_object(ACPI_HANDLE, const char *, uint32_t); 185 static void acpibat_get_info(device_t); 186 static void acpibat_print_info(device_t, ACPI_OBJECT *); 187 static void acpibat_get_status(device_t); 188 static void acpibat_update_info(void *); 189 static void acpibat_update_status(void *); 190 static void acpibat_init_envsys(device_t); 191 static void acpibat_notify_handler(ACPI_HANDLE, uint32_t, void *); 192 static void acpibat_refresh(struct sysmon_envsys *, envsys_data_t *); 193 static bool acpibat_resume(device_t, const pmf_qual_t *); 194 static void acpibat_get_limits(struct sysmon_envsys *, envsys_data_t *, 195 sysmon_envsys_lim_t *, uint32_t *); 196 197 CFATTACH_DECL_NEW(acpibat, sizeof(struct acpibat_softc), 198 acpibat_match, acpibat_attach, acpibat_detach, NULL); 199 200 /* 201 * acpibat_match: 202 * 203 * Autoconfiguration `match' routine. 204 */ 205 static int 206 acpibat_match(device_t parent, cfdata_t match, void *aux) 207 { 208 struct acpi_attach_args *aa = aux; 209 210 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 211 return 0; 212 213 return acpi_match_hid(aa->aa_node->ad_devinfo, bat_hid); 214 } 215 216 /* 217 * acpibat_attach: 218 * 219 * Autoconfiguration `attach' routine. 220 */ 221 static void 222 acpibat_attach(device_t parent, device_t self, void *aux) 223 { 224 struct acpibat_softc *sc = device_private(self); 225 struct acpi_attach_args *aa = aux; 226 ACPI_HANDLE tmp; 227 ACPI_STATUS rv; 228 229 aprint_naive(": ACPI Battery\n"); 230 aprint_normal(": ACPI Battery\n"); 231 232 sc->sc_node = aa->aa_node; 233 234 sc->sc_present = 0; 235 sc->sc_dvoltage = 0; 236 sc->sc_dcapacity = 0; 237 sc->sc_lcapacity = 0; 238 sc->sc_wcapacity = 0; 239 240 sc->sc_sme = NULL; 241 sc->sc_sensor = NULL; 242 243 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_NONE); 244 cv_init(&sc->sc_condvar, device_xname(self)); 245 246 (void)pmf_device_register(self, NULL, acpibat_resume); 247 (void)acpi_register_notify(sc->sc_node, acpibat_notify_handler); 248 249 sc->sc_sensor = kmem_zalloc(ACPIBAT_COUNT * 250 sizeof(*sc->sc_sensor), KM_SLEEP); 251 252 if (sc->sc_sensor == NULL) 253 return; 254 255 acpibat_init_envsys(self); 256 257 /* 258 * If this is ever seen, the driver should be extended. 259 */ 260 rv = AcpiGetHandle(sc->sc_node->ad_handle, "_BIX", &tmp); 261 262 if (ACPI_SUCCESS(rv)) 263 aprint_verbose_dev(self, "ACPI 4.0 functionality present\n"); 264 } 265 266 /* 267 * acpibat_detach: 268 * 269 * Autoconfiguration `detach' routine. 270 */ 271 static int 272 acpibat_detach(device_t self, int flags) 273 { 274 struct acpibat_softc *sc = device_private(self); 275 276 acpi_deregister_notify(sc->sc_node); 277 278 cv_destroy(&sc->sc_condvar); 279 mutex_destroy(&sc->sc_mutex); 280 281 if (sc->sc_sme != NULL) 282 sysmon_envsys_unregister(sc->sc_sme); 283 284 if (sc->sc_sensor != NULL) 285 kmem_free(sc->sc_sensor, ACPIBAT_COUNT * 286 sizeof(*sc->sc_sensor)); 287 288 pmf_device_deregister(self); 289 290 return 0; 291 } 292 293 /* 294 * acpibat_get_sta: 295 * 296 * Evaluate whether the battery is present or absent. 297 * 298 * Returns: 0 for no battery, 1 for present, and -1 on error. 299 */ 300 static int 301 acpibat_get_sta(device_t dv) 302 { 303 struct acpibat_softc *sc = device_private(dv); 304 ACPI_INTEGER val; 305 ACPI_STATUS rv; 306 307 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_STA", &val); 308 309 if (ACPI_FAILURE(rv)) { 310 aprint_error_dev(dv, "failed to evaluate _STA\n"); 311 return -1; 312 } 313 314 sc->sc_sensor[ACPIBAT_PRESENT].state = ENVSYS_SVALID; 315 316 if ((val & ACPI_STA_BATTERY_PRESENT) == 0) { 317 sc->sc_sensor[ACPIBAT_PRESENT].value_cur = 0; 318 return 0; 319 } 320 321 sc->sc_sensor[ACPIBAT_PRESENT].value_cur = 1; 322 323 return 1; 324 } 325 326 static ACPI_OBJECT * 327 acpibat_get_object(ACPI_HANDLE hdl, const char *pth, uint32_t count) 328 { 329 ACPI_OBJECT *obj; 330 ACPI_BUFFER buf; 331 ACPI_STATUS rv; 332 333 rv = acpi_eval_struct(hdl, pth, &buf); 334 335 if (ACPI_FAILURE(rv)) 336 return NULL; 337 338 obj = buf.Pointer; 339 340 if (obj->Type != ACPI_TYPE_PACKAGE) { 341 ACPI_FREE(buf.Pointer); 342 return NULL; 343 } 344 345 if (obj->Package.Count != count) { 346 ACPI_FREE(buf.Pointer); 347 return NULL; 348 } 349 350 return obj; 351 } 352 353 /* 354 * acpibat_get_info: 355 * 356 * Get the battery info. 357 */ 358 static void 359 acpibat_get_info(device_t dv) 360 { 361 struct acpibat_softc *sc = device_private(dv); 362 ACPI_HANDLE hdl = sc->sc_node->ad_handle; 363 ACPI_OBJECT *elm, *obj; 364 ACPI_STATUS rv = AE_OK; 365 int capunit, i, rateunit; 366 uint64_t val; 367 368 obj = acpibat_get_object(hdl, "_BIF", ACPIBAT_BIF_COUNT); 369 370 if (obj == NULL) { 371 rv = AE_ERROR; 372 goto out; 373 } 374 375 elm = obj->Package.Elements; 376 377 for (i = ACPIBAT_BIF_UNIT; i < ACPIBAT_BIF_MODEL; i++) { 378 379 if (elm[i].Type != ACPI_TYPE_INTEGER) { 380 rv = AE_TYPE; 381 goto out; 382 } 383 384 KDASSERT((uint64_t)elm[i].Integer.Value < INT_MAX); 385 } 386 387 if ((elm[ACPIBAT_BIF_UNIT].Integer.Value & ACPIBAT_PWRUNIT_MA) != 0) { 388 capunit = ENVSYS_SAMPHOUR; 389 rateunit = ENVSYS_SAMPS; 390 } else { 391 capunit = ENVSYS_SWATTHOUR; 392 rateunit = ENVSYS_SWATTS; 393 } 394 395 sc->sc_sensor[ACPIBAT_DCAPACITY].units = capunit; 396 sc->sc_sensor[ACPIBAT_LFCCAPACITY].units = capunit; 397 sc->sc_sensor[ACPIBAT_CHARGERATE].units = rateunit; 398 sc->sc_sensor[ACPIBAT_DISCHARGERATE].units = rateunit; 399 sc->sc_sensor[ACPIBAT_CAPACITY].units = capunit; 400 401 /* Design capacity. */ 402 val = elm[ACPIBAT_BIF_DCAPACITY].Integer.Value; 403 sc->sc_sensor[ACPIBAT_DCAPACITY].value_cur = val * 1000; 404 sc->sc_sensor[ACPIBAT_DCAPACITY].state = ACPIBAT_VAL_ISVALID(val); 405 406 /* Last full charge capacity. */ 407 val = elm[ACPIBAT_BIF_LFCCAPACITY].Integer.Value; 408 sc->sc_sensor[ACPIBAT_LFCCAPACITY].value_cur = val * 1000; 409 sc->sc_sensor[ACPIBAT_LFCCAPACITY].state = ACPIBAT_VAL_ISVALID(val); 410 411 /* Design voltage. */ 412 val = elm[ACPIBAT_BIF_DVOLTAGE].Integer.Value; 413 sc->sc_sensor[ACPIBAT_DVOLTAGE].value_cur = val * 1000; 414 sc->sc_sensor[ACPIBAT_DVOLTAGE].state = ACPIBAT_VAL_ISVALID(val); 415 416 /* Design low and warning capacity. */ 417 sc->sc_lcapacity = elm[ACPIBAT_BIF_LCAPACITY].Integer.Value * 1000; 418 sc->sc_wcapacity = elm[ACPIBAT_BIF_WCAPACITY].Integer.Value * 1000; 419 420 /* 421 * Initialize the maximum of current capacity 422 * to the last known full charge capacity. 423 */ 424 val = sc->sc_sensor[ACPIBAT_LFCCAPACITY].value_cur; 425 sc->sc_sensor[ACPIBAT_CAPACITY].value_max = val; 426 427 acpibat_print_info(dv, elm); 428 429 out: 430 if (obj != NULL) 431 ACPI_FREE(obj); 432 433 if (ACPI_FAILURE(rv)) 434 aprint_error_dev(dv, "failed to evaluate _BIF: %s\n", 435 AcpiFormatException(rv)); 436 } 437 438 /* 439 * acpibat_print_info: 440 * 441 * Display the battery info. 442 */ 443 static void 444 acpibat_print_info(device_t dv, ACPI_OBJECT *elm) 445 { 446 struct acpibat_softc *sc = device_private(dv); 447 const char *tech, *unit; 448 int32_t dcap, dvol; 449 int i; 450 451 for (i = ACPIBAT_BIF_OEM; i > ACPIBAT_BIF_GRANULARITY2; i--) { 452 453 if (elm[i].Type != ACPI_TYPE_STRING) 454 return; 455 456 if (elm[i].String.Pointer == NULL) 457 return; 458 459 if (elm[i].String.Pointer[0] == '\0') 460 return; 461 } 462 463 dcap = elm[ACPIBAT_BIF_DCAPACITY].Integer.Value; 464 dvol = elm[ACPIBAT_BIF_DVOLTAGE].Integer.Value; 465 466 /* 467 * Try to detect whether the battery was switched. 468 */ 469 if (sc->sc_dcapacity == dcap && sc->sc_dvoltage == dvol) 470 return; 471 else { 472 sc->sc_dcapacity = dcap; 473 sc->sc_dvoltage = dvol; 474 } 475 476 tech = (elm[ACPIBAT_BIF_TECHNOLOGY].Integer.Value != 0) ? 477 "rechargeable" : "non-rechargeable"; 478 479 aprint_normal_dev(dv, "%s %s %s battery\n", 480 elm[ACPIBAT_BIF_OEM].String.Pointer, 481 elm[ACPIBAT_BIF_TYPE].String.Pointer, tech); 482 483 aprint_debug_dev(dv, "model number %s, serial number %s\n", 484 elm[ACPIBAT_BIF_MODEL].String.Pointer, 485 elm[ACPIBAT_BIF_SERIAL].String.Pointer); 486 487 #define SCALE(x) (((int)x) / 1000000), ((((int)x) % 1000000) / 1000) 488 489 /* 490 * These values are defined as follows (ACPI 4.0, p. 388): 491 * 492 * Granularity 1. "Battery capacity granularity between low 493 * and warning in [mAh] or [mWh]. That is, 494 * this is the smallest increment in capacity 495 * that the battery is capable of measuring." 496 * 497 * Granularity 2. "Battery capacity granularity between warning 498 * and full in [mAh] or [mWh]. [...]" 499 */ 500 if ((elm[ACPIBAT_BIF_UNIT].Integer.Value & ACPIBAT_PWRUNIT_MA) != 0) 501 unit = "Ah"; 502 else 503 unit = "Wh"; 504 505 aprint_verbose_dev(dv, "granularity: " 506 "low->warn %d.%03d %s, warn->full %d.%03d %s\n", 507 SCALE(elm[ACPIBAT_BIF_GRANULARITY1].Integer.Value * 1000), unit, 508 SCALE(elm[ACPIBAT_BIF_GRANULARITY2].Integer.Value * 1000), unit); 509 } 510 511 /* 512 * acpibat_get_status: 513 * 514 * Get the current battery status. 515 */ 516 static void 517 acpibat_get_status(device_t dv) 518 { 519 struct acpibat_softc *sc = device_private(dv); 520 ACPI_HANDLE hdl = sc->sc_node->ad_handle; 521 ACPI_OBJECT *elm, *obj; 522 ACPI_STATUS rv = AE_OK; 523 int i, rate, state; 524 uint64_t val; 525 526 obj = acpibat_get_object(hdl, "_BST", ACPIBAT_BST_COUNT); 527 528 if (obj == NULL) { 529 rv = AE_ERROR; 530 goto out; 531 } 532 533 elm = obj->Package.Elements; 534 535 for (i = ACPIBAT_BST_STATE; i < ACPIBAT_BST_COUNT; i++) { 536 537 if (elm[i].Type != ACPI_TYPE_INTEGER) { 538 rv = AE_TYPE; 539 goto out; 540 } 541 } 542 543 state = elm[ACPIBAT_BST_STATE].Integer.Value; 544 545 if ((state & ACPIBAT_ST_CHARGING) != 0) { 546 /* XXX rate can be invalid */ 547 rate = elm[ACPIBAT_BST_RATE].Integer.Value; 548 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SVALID; 549 sc->sc_sensor[ACPIBAT_CHARGERATE].value_cur = rate * 1000; 550 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SINVALID; 551 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 552 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 1; 553 } else if ((state & ACPIBAT_ST_DISCHARGING) != 0) { 554 rate = elm[ACPIBAT_BST_RATE].Integer.Value; 555 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SVALID; 556 sc->sc_sensor[ACPIBAT_DISCHARGERATE].value_cur = rate * 1000; 557 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SINVALID; 558 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 559 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 0; 560 } else { 561 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 562 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 0; 563 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SINVALID; 564 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SINVALID; 565 } 566 567 /* Remaining capacity. */ 568 val = elm[ACPIBAT_BST_CAPACITY].Integer.Value; 569 sc->sc_sensor[ACPIBAT_CAPACITY].value_cur = val * 1000; 570 sc->sc_sensor[ACPIBAT_CAPACITY].state = ACPIBAT_VAL_ISVALID(val); 571 572 /* Battery voltage. */ 573 val = elm[ACPIBAT_BST_VOLTAGE].Integer.Value; 574 sc->sc_sensor[ACPIBAT_VOLTAGE].value_cur = val * 1000; 575 sc->sc_sensor[ACPIBAT_VOLTAGE].state = ACPIBAT_VAL_ISVALID(val); 576 577 sc->sc_sensor[ACPIBAT_CHARGE_STATE].state = ENVSYS_SVALID; 578 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 579 ENVSYS_BATTERY_CAPACITY_NORMAL; 580 581 if (sc->sc_sensor[ACPIBAT_CAPACITY].value_cur < sc->sc_wcapacity) { 582 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SWARNUNDER; 583 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 584 ENVSYS_BATTERY_CAPACITY_WARNING; 585 } 586 587 if (sc->sc_sensor[ACPIBAT_CAPACITY].value_cur < sc->sc_lcapacity) { 588 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SCRITUNDER; 589 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 590 ENVSYS_BATTERY_CAPACITY_LOW; 591 } 592 593 if ((state & ACPIBAT_ST_CRITICAL) != 0) { 594 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SCRITICAL; 595 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 596 ENVSYS_BATTERY_CAPACITY_CRITICAL; 597 } 598 599 out: 600 if (obj != NULL) 601 ACPI_FREE(obj); 602 603 if (ACPI_FAILURE(rv)) 604 aprint_error_dev(dv, "failed to evaluate _BST: %s\n", 605 AcpiFormatException(rv)); 606 } 607 608 static void 609 acpibat_update_info(void *arg) 610 { 611 device_t dv = arg; 612 struct acpibat_softc *sc = device_private(dv); 613 int i, rv; 614 615 mutex_enter(&sc->sc_mutex); 616 617 rv = acpibat_get_sta(dv); 618 619 if (rv > 0) { 620 acpibat_get_info(dv); 621 622 /* 623 * If the status changed, update the limits. 624 */ 625 if (sc->sc_present == 0 && 626 sc->sc_sensor[ACPIBAT_CAPACITY].value_max > 0) 627 sysmon_envsys_update_limits(sc->sc_sme, 628 &sc->sc_sensor[ACPIBAT_CAPACITY]); 629 } else { 630 i = (rv < 0) ? 0 : ACPIBAT_DVOLTAGE; 631 632 while (i < ACPIBAT_COUNT) { 633 sc->sc_sensor[i].state = ENVSYS_SINVALID; 634 i++; 635 } 636 } 637 638 sc->sc_present = rv; 639 640 mutex_exit(&sc->sc_mutex); 641 } 642 643 static void 644 acpibat_update_status(void *arg) 645 { 646 device_t dv = arg; 647 struct acpibat_softc *sc = device_private(dv); 648 int i, rv; 649 650 mutex_enter(&sc->sc_mutex); 651 652 rv = acpibat_get_sta(dv); 653 654 if (rv > 0) { 655 656 if (sc->sc_present == 0) 657 acpibat_get_info(dv); 658 659 acpibat_get_status(dv); 660 } else { 661 i = (rv < 0) ? 0 : ACPIBAT_DVOLTAGE; 662 663 while (i < ACPIBAT_COUNT) { 664 sc->sc_sensor[i].state = ENVSYS_SINVALID; 665 i++; 666 } 667 } 668 669 sc->sc_present = rv; 670 microtime(&sc->sc_last); 671 672 cv_broadcast(&sc->sc_condvar); 673 mutex_exit(&sc->sc_mutex); 674 } 675 676 /* 677 * acpibat_notify_handler: 678 * 679 * Callback from ACPI interrupt handler to notify us of an event. 680 */ 681 static void 682 acpibat_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context) 683 { 684 static const int handler = OSL_NOTIFY_HANDLER; 685 device_t dv = context; 686 687 switch (notify) { 688 689 case ACPI_NOTIFY_BUS_CHECK: 690 break; 691 692 case ACPI_NOTIFY_BAT_INFO: 693 case ACPI_NOTIFY_DEVICE_CHECK: 694 (void)AcpiOsExecute(handler, acpibat_update_info, dv); 695 break; 696 697 case ACPI_NOTIFY_BAT_STATUS: 698 (void)AcpiOsExecute(handler, acpibat_update_status, dv); 699 break; 700 701 default: 702 aprint_error_dev(dv, "unknown notify: 0x%02X\n", notify); 703 } 704 } 705 706 static void 707 acpibat_init_envsys(device_t dv) 708 { 709 struct acpibat_softc *sc = device_private(dv); 710 int i; 711 712 #define INITDATA(index, unit, string) \ 713 do { \ 714 sc->sc_sensor[index].state = ENVSYS_SVALID; \ 715 sc->sc_sensor[index].units = unit; \ 716 (void)strlcpy(sc->sc_sensor[index].desc, string, \ 717 sizeof(sc->sc_sensor[index].desc)); \ 718 } while (/* CONSTCOND */ 0) 719 720 INITDATA(ACPIBAT_PRESENT, ENVSYS_INDICATOR, "present"); 721 INITDATA(ACPIBAT_DCAPACITY, ENVSYS_SWATTHOUR, "design cap"); 722 INITDATA(ACPIBAT_LFCCAPACITY, ENVSYS_SWATTHOUR, "last full cap"); 723 INITDATA(ACPIBAT_DVOLTAGE, ENVSYS_SVOLTS_DC, "design voltage"); 724 INITDATA(ACPIBAT_VOLTAGE, ENVSYS_SVOLTS_DC, "voltage"); 725 INITDATA(ACPIBAT_CHARGERATE, ENVSYS_SWATTS, "charge rate"); 726 INITDATA(ACPIBAT_DISCHARGERATE, ENVSYS_SWATTS, "discharge rate"); 727 INITDATA(ACPIBAT_CAPACITY, ENVSYS_SWATTHOUR, "charge"); 728 INITDATA(ACPIBAT_CHARGING, ENVSYS_BATTERY_CHARGE, "charging"); 729 INITDATA(ACPIBAT_CHARGE_STATE, ENVSYS_BATTERY_CAPACITY, "charge state"); 730 731 #undef INITDATA 732 733 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 734 ENVSYS_BATTERY_CAPACITY_NORMAL; 735 736 sc->sc_sensor[ACPIBAT_CAPACITY].flags |= 737 ENVSYS_FPERCENT | ENVSYS_FVALID_MAX | ENVSYS_FMONLIMITS; 738 739 sc->sc_sensor[ACPIBAT_CHARGE_STATE].flags |= ENVSYS_FMONSTCHANGED; 740 741 /* Disable userland monitoring on these sensors. */ 742 sc->sc_sensor[ACPIBAT_VOLTAGE].flags = ENVSYS_FMONNOTSUPP; 743 sc->sc_sensor[ACPIBAT_CHARGERATE].flags = ENVSYS_FMONNOTSUPP; 744 sc->sc_sensor[ACPIBAT_DISCHARGERATE].flags = ENVSYS_FMONNOTSUPP; 745 sc->sc_sensor[ACPIBAT_DCAPACITY].flags = ENVSYS_FMONNOTSUPP; 746 sc->sc_sensor[ACPIBAT_LFCCAPACITY].flags = ENVSYS_FMONNOTSUPP; 747 sc->sc_sensor[ACPIBAT_DVOLTAGE].flags = ENVSYS_FMONNOTSUPP; 748 749 /* Attach rnd(9) to the (dis)charge rates. */ 750 sc->sc_sensor[ACPIBAT_CHARGERATE].flags |= ENVSYS_FHAS_ENTROPY; 751 sc->sc_sensor[ACPIBAT_DISCHARGERATE].flags |= ENVSYS_FHAS_ENTROPY; 752 753 sc->sc_sme = sysmon_envsys_create(); 754 755 for (i = 0; i < ACPIBAT_COUNT; i++) { 756 757 if (sysmon_envsys_sensor_attach(sc->sc_sme, 758 &sc->sc_sensor[i])) 759 goto fail; 760 } 761 762 sc->sc_sme->sme_name = device_xname(dv); 763 sc->sc_sme->sme_cookie = dv; 764 sc->sc_sme->sme_refresh = acpibat_refresh; 765 sc->sc_sme->sme_class = SME_CLASS_BATTERY; 766 sc->sc_sme->sme_flags = SME_POLL_ONLY | SME_INIT_REFRESH; 767 sc->sc_sme->sme_get_limits = acpibat_get_limits; 768 769 acpibat_update_info(dv); 770 acpibat_update_status(dv); 771 772 if (sysmon_envsys_register(sc->sc_sme)) 773 goto fail; 774 775 return; 776 777 fail: 778 aprint_error_dev(dv, "failed to initialize sysmon\n"); 779 780 sysmon_envsys_destroy(sc->sc_sme); 781 kmem_free(sc->sc_sensor, ACPIBAT_COUNT * sizeof(*sc->sc_sensor)); 782 783 sc->sc_sme = NULL; 784 sc->sc_sensor = NULL; 785 } 786 787 static void 788 acpibat_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 789 { 790 device_t self = sme->sme_cookie; 791 struct acpibat_softc *sc; 792 struct timeval tv, tmp; 793 ACPI_STATUS rv; 794 795 sc = device_private(self); 796 797 tmp.tv_sec = 10; 798 tmp.tv_usec = 0; 799 800 microtime(&tv); 801 timersub(&tv, &tmp, &tv); 802 803 if (timercmp(&tv, &sc->sc_last, <) != 0) 804 return; 805 806 if (mutex_tryenter(&sc->sc_mutex) == 0) 807 return; 808 809 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_status, self); 810 811 if (ACPI_SUCCESS(rv)) 812 cv_timedwait(&sc->sc_condvar, &sc->sc_mutex, hz); 813 814 mutex_exit(&sc->sc_mutex); 815 } 816 817 static bool 818 acpibat_resume(device_t dv, const pmf_qual_t *qual) 819 { 820 821 (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_info, dv); 822 (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_status, dv); 823 824 return true; 825 } 826 827 static void 828 acpibat_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 829 sysmon_envsys_lim_t *limits, uint32_t *props) 830 { 831 device_t dv = sme->sme_cookie; 832 struct acpibat_softc *sc = device_private(dv); 833 834 if (edata->sensor != ACPIBAT_CAPACITY) 835 return; 836 837 limits->sel_critmin = sc->sc_lcapacity; 838 limits->sel_warnmin = sc->sc_wcapacity; 839 840 *props |= PROP_BATTCAP | PROP_BATTWARN | PROP_DRIVER_LIMITS; 841 } 842 843 MODULE(MODULE_CLASS_DRIVER, acpibat, NULL); 844 845 #ifdef _MODULE 846 #include "ioconf.c" 847 #endif 848 849 static int 850 acpibat_modcmd(modcmd_t cmd, void *aux) 851 { 852 int rv = 0; 853 854 switch (cmd) { 855 856 case MODULE_CMD_INIT: 857 858 #ifdef _MODULE 859 rv = config_init_component(cfdriver_ioconf_acpibat, 860 cfattach_ioconf_acpibat, cfdata_ioconf_acpibat); 861 #endif 862 break; 863 864 case MODULE_CMD_FINI: 865 866 #ifdef _MODULE 867 rv = config_fini_component(cfdriver_ioconf_acpibat, 868 cfattach_ioconf_acpibat, cfdata_ioconf_acpibat); 869 #endif 870 break; 871 872 default: 873 rv = ENOTTY; 874 } 875 876 return rv; 877 } 878