1 /* $NetBSD: acpi_bat.c,v 1.117 2021/01/29 15:20:13 thorpej 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 1.117 2021/01/29 15:20:13 thorpej 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 struct device_compatible_entry compat_data[] = { 163 { .compat = "PNP0C0A" }, 164 DEVICE_COMPAT_EOL 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 return acpi_compatible_match(aa, compat_data); 211 } 212 213 /* 214 * acpibat_attach: 215 * 216 * Autoconfiguration `attach' routine. 217 */ 218 static void 219 acpibat_attach(device_t parent, device_t self, void *aux) 220 { 221 struct acpibat_softc *sc = device_private(self); 222 struct acpi_attach_args *aa = aux; 223 ACPI_HANDLE tmp; 224 ACPI_STATUS rv; 225 226 aprint_naive(": ACPI Battery\n"); 227 aprint_normal(": ACPI Battery\n"); 228 229 sc->sc_node = aa->aa_node; 230 231 sc->sc_present = 0; 232 sc->sc_dvoltage = 0; 233 sc->sc_dcapacity = 0; 234 sc->sc_lcapacity = 0; 235 sc->sc_wcapacity = 0; 236 237 sc->sc_sme = NULL; 238 sc->sc_sensor = NULL; 239 240 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_NONE); 241 cv_init(&sc->sc_condvar, device_xname(self)); 242 243 (void)pmf_device_register(self, NULL, acpibat_resume); 244 (void)acpi_register_notify(sc->sc_node, acpibat_notify_handler); 245 246 sc->sc_sensor = kmem_zalloc(ACPIBAT_COUNT * 247 sizeof(*sc->sc_sensor), KM_SLEEP); 248 249 if (sc->sc_sensor == NULL) 250 return; 251 252 config_interrupts(self, acpibat_init_envsys); 253 254 /* 255 * If this is ever seen, the driver should be extended. 256 */ 257 rv = AcpiGetHandle(sc->sc_node->ad_handle, "_BIX", &tmp); 258 259 if (ACPI_SUCCESS(rv)) 260 aprint_verbose_dev(self, "ACPI 4.0 functionality present\n"); 261 } 262 263 /* 264 * acpibat_detach: 265 * 266 * Autoconfiguration `detach' routine. 267 */ 268 static int 269 acpibat_detach(device_t self, int flags) 270 { 271 struct acpibat_softc *sc = device_private(self); 272 273 acpi_deregister_notify(sc->sc_node); 274 275 cv_destroy(&sc->sc_condvar); 276 mutex_destroy(&sc->sc_mutex); 277 278 if (sc->sc_sme != NULL) 279 sysmon_envsys_unregister(sc->sc_sme); 280 281 if (sc->sc_sensor != NULL) 282 kmem_free(sc->sc_sensor, ACPIBAT_COUNT * 283 sizeof(*sc->sc_sensor)); 284 285 pmf_device_deregister(self); 286 287 return 0; 288 } 289 290 /* 291 * acpibat_get_sta: 292 * 293 * Evaluate whether the battery is present or absent. 294 * 295 * Returns: 0 for no battery, 1 for present, and -1 on error. 296 */ 297 static int 298 acpibat_get_sta(device_t dv) 299 { 300 struct acpibat_softc *sc = device_private(dv); 301 ACPI_INTEGER val; 302 ACPI_STATUS rv; 303 304 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_STA", &val); 305 306 if (ACPI_FAILURE(rv)) { 307 aprint_error_dev(dv, "failed to evaluate _STA\n"); 308 return -1; 309 } 310 311 sc->sc_sensor[ACPIBAT_PRESENT].state = ENVSYS_SVALID; 312 313 if ((val & ACPI_STA_BATTERY_PRESENT) == 0) { 314 sc->sc_sensor[ACPIBAT_PRESENT].value_cur = 0; 315 return 0; 316 } 317 318 sc->sc_sensor[ACPIBAT_PRESENT].value_cur = 1; 319 320 return 1; 321 } 322 323 static ACPI_OBJECT * 324 acpibat_get_object(ACPI_HANDLE hdl, const char *pth, uint32_t count) 325 { 326 ACPI_OBJECT *obj; 327 ACPI_BUFFER buf; 328 ACPI_STATUS rv; 329 330 rv = acpi_eval_struct(hdl, pth, &buf); 331 332 if (ACPI_FAILURE(rv)) 333 return NULL; 334 335 obj = buf.Pointer; 336 337 if (obj->Type != ACPI_TYPE_PACKAGE) { 338 ACPI_FREE(buf.Pointer); 339 return NULL; 340 } 341 342 if (obj->Package.Count != count) { 343 ACPI_FREE(buf.Pointer); 344 return NULL; 345 } 346 347 return obj; 348 } 349 350 /* 351 * acpibat_get_info: 352 * 353 * Get the battery info. 354 */ 355 static void 356 acpibat_get_info(device_t dv) 357 { 358 struct acpibat_softc *sc = device_private(dv); 359 ACPI_HANDLE hdl = sc->sc_node->ad_handle; 360 ACPI_OBJECT *elm, *obj; 361 ACPI_STATUS rv = AE_OK; 362 int capunit, i, rateunit; 363 uint64_t val; 364 365 obj = acpibat_get_object(hdl, "_BIF", ACPIBAT_BIF_COUNT); 366 367 if (obj == NULL) { 368 rv = AE_ERROR; 369 goto out; 370 } 371 372 elm = obj->Package.Elements; 373 374 for (i = ACPIBAT_BIF_UNIT; i < ACPIBAT_BIF_MODEL; i++) { 375 376 if (elm[i].Type != ACPI_TYPE_INTEGER) { 377 rv = AE_TYPE; 378 goto out; 379 } 380 381 if (elm[i].Integer.Value != ACPIBAT_VAL_UNKNOWN && 382 elm[i].Integer.Value >= INT_MAX) { 383 rv = AE_LIMIT; 384 goto out; 385 } 386 } 387 388 switch (elm[ACPIBAT_BIF_UNIT].Integer.Value) { 389 case ACPIBAT_PWRUNIT_MA: 390 capunit = ENVSYS_SAMPHOUR; 391 rateunit = ENVSYS_SAMPS; 392 break; 393 default: 394 capunit = ENVSYS_SWATTHOUR; 395 rateunit = ENVSYS_SWATTS; 396 break; 397 } 398 399 sc->sc_sensor[ACPIBAT_DCAPACITY].units = capunit; 400 sc->sc_sensor[ACPIBAT_LFCCAPACITY].units = capunit; 401 sc->sc_sensor[ACPIBAT_CHARGERATE].units = rateunit; 402 sc->sc_sensor[ACPIBAT_DISCHARGERATE].units = rateunit; 403 sc->sc_sensor[ACPIBAT_CAPACITY].units = capunit; 404 405 /* Design capacity. */ 406 val = elm[ACPIBAT_BIF_DCAPACITY].Integer.Value; 407 sc->sc_sensor[ACPIBAT_DCAPACITY].value_cur = val * 1000; 408 sc->sc_sensor[ACPIBAT_DCAPACITY].state = ACPIBAT_VAL_ISVALID(val); 409 410 /* Last full charge capacity. */ 411 val = elm[ACPIBAT_BIF_LFCCAPACITY].Integer.Value; 412 sc->sc_sensor[ACPIBAT_LFCCAPACITY].value_cur = val * 1000; 413 sc->sc_sensor[ACPIBAT_LFCCAPACITY].state = ACPIBAT_VAL_ISVALID(val); 414 415 /* Design voltage. */ 416 val = elm[ACPIBAT_BIF_DVOLTAGE].Integer.Value; 417 sc->sc_sensor[ACPIBAT_DVOLTAGE].value_cur = val * 1000; 418 sc->sc_sensor[ACPIBAT_DVOLTAGE].state = ACPIBAT_VAL_ISVALID(val); 419 420 /* Design low and warning capacity. */ 421 sc->sc_lcapacity = elm[ACPIBAT_BIF_LCAPACITY].Integer.Value * 1000; 422 sc->sc_wcapacity = elm[ACPIBAT_BIF_WCAPACITY].Integer.Value * 1000; 423 424 /* 425 * Initialize the maximum of current capacity 426 * to the last known full charge capacity. 427 */ 428 val = sc->sc_sensor[ACPIBAT_LFCCAPACITY].value_cur; 429 sc->sc_sensor[ACPIBAT_CAPACITY].value_max = val; 430 431 acpibat_print_info(dv, elm); 432 433 out: 434 if (obj != NULL) 435 ACPI_FREE(obj); 436 437 if (ACPI_FAILURE(rv)) 438 aprint_error_dev(dv, "failed to evaluate _BIF: %s\n", 439 AcpiFormatException(rv)); 440 } 441 442 /* 443 * acpibat_print_info: 444 * 445 * Display the battery info. 446 */ 447 static void 448 acpibat_print_info(device_t dv, ACPI_OBJECT *elm) 449 { 450 struct acpibat_softc *sc = device_private(dv); 451 const char *tech, *unit; 452 int32_t dcap, dvol; 453 int i; 454 455 for (i = ACPIBAT_BIF_OEM; i > ACPIBAT_BIF_GRANULARITY2; i--) { 456 457 if (elm[i].Type != ACPI_TYPE_STRING) 458 return; 459 460 if (elm[i].String.Pointer == NULL) 461 return; 462 463 if (elm[i].String.Pointer[0] == '\0') 464 return; 465 } 466 467 dcap = elm[ACPIBAT_BIF_DCAPACITY].Integer.Value; 468 dvol = elm[ACPIBAT_BIF_DVOLTAGE].Integer.Value; 469 470 /* 471 * Try to detect whether the battery was switched. 472 */ 473 if (sc->sc_dcapacity == dcap && sc->sc_dvoltage == dvol) 474 return; 475 else { 476 sc->sc_dcapacity = dcap; 477 sc->sc_dvoltage = dvol; 478 } 479 480 tech = (elm[ACPIBAT_BIF_TECHNOLOGY].Integer.Value != 0) ? 481 "rechargeable" : "non-rechargeable"; 482 483 aprint_normal_dev(dv, "%s %s %s battery\n", 484 elm[ACPIBAT_BIF_OEM].String.Pointer, 485 elm[ACPIBAT_BIF_TYPE].String.Pointer, tech); 486 487 aprint_debug_dev(dv, "model number %s, serial number %s\n", 488 elm[ACPIBAT_BIF_MODEL].String.Pointer, 489 elm[ACPIBAT_BIF_SERIAL].String.Pointer); 490 491 #define SCALE(x) (((int)x) / 1000000), ((((int)x) % 1000000) / 1000) 492 493 /* 494 * These values are defined as follows (ACPI 4.0, p. 388): 495 * 496 * Granularity 1. "Battery capacity granularity between low 497 * and warning in [mAh] or [mWh]. That is, 498 * this is the smallest increment in capacity 499 * that the battery is capable of measuring." 500 * 501 * Granularity 2. "Battery capacity granularity between warning 502 * and full in [mAh] or [mWh]. [...]" 503 */ 504 switch (elm[ACPIBAT_BIF_UNIT].Integer.Value) { 505 case ACPIBAT_PWRUNIT_MA: 506 unit = "Ah"; 507 break; 508 default: 509 unit = "Wh"; 510 break; 511 } 512 513 aprint_verbose_dev(dv, "granularity: " 514 "low->warn %d.%03d %s, warn->full %d.%03d %s\n", 515 SCALE(elm[ACPIBAT_BIF_GRANULARITY1].Integer.Value * 1000), unit, 516 SCALE(elm[ACPIBAT_BIF_GRANULARITY2].Integer.Value * 1000), unit); 517 } 518 519 /* 520 * acpibat_get_status: 521 * 522 * Get the current battery status. 523 */ 524 static void 525 acpibat_get_status(device_t dv) 526 { 527 struct acpibat_softc *sc = device_private(dv); 528 ACPI_HANDLE hdl = sc->sc_node->ad_handle; 529 ACPI_OBJECT *elm, *obj; 530 ACPI_STATUS rv = AE_OK; 531 int i, rate, state; 532 uint64_t val; 533 534 obj = acpibat_get_object(hdl, "_BST", ACPIBAT_BST_COUNT); 535 536 if (obj == NULL) { 537 rv = AE_ERROR; 538 goto out; 539 } 540 541 elm = obj->Package.Elements; 542 543 for (i = ACPIBAT_BST_STATE; i < ACPIBAT_BST_COUNT; i++) { 544 545 if (elm[i].Type != ACPI_TYPE_INTEGER) { 546 rv = AE_TYPE; 547 goto out; 548 } 549 } 550 551 state = elm[ACPIBAT_BST_STATE].Integer.Value; 552 553 if ((state & ACPIBAT_ST_CHARGING) != 0) { 554 /* XXX rate can be invalid */ 555 rate = elm[ACPIBAT_BST_RATE].Integer.Value; 556 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SVALID; 557 sc->sc_sensor[ACPIBAT_CHARGERATE].value_cur = rate * 1000; 558 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SINVALID; 559 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 560 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 1; 561 } else if ((state & ACPIBAT_ST_DISCHARGING) != 0) { 562 rate = elm[ACPIBAT_BST_RATE].Integer.Value; 563 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SVALID; 564 sc->sc_sensor[ACPIBAT_DISCHARGERATE].value_cur = rate * 1000; 565 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SINVALID; 566 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 567 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 0; 568 } else { 569 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 570 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 0; 571 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SINVALID; 572 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SINVALID; 573 } 574 575 /* Remaining capacity. */ 576 val = elm[ACPIBAT_BST_CAPACITY].Integer.Value; 577 sc->sc_sensor[ACPIBAT_CAPACITY].value_cur = val * 1000; 578 sc->sc_sensor[ACPIBAT_CAPACITY].state = ACPIBAT_VAL_ISVALID(val); 579 580 /* Battery voltage. */ 581 val = elm[ACPIBAT_BST_VOLTAGE].Integer.Value; 582 sc->sc_sensor[ACPIBAT_VOLTAGE].value_cur = val * 1000; 583 sc->sc_sensor[ACPIBAT_VOLTAGE].state = ACPIBAT_VAL_ISVALID(val); 584 585 sc->sc_sensor[ACPIBAT_CHARGE_STATE].state = ENVSYS_SVALID; 586 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 587 ENVSYS_BATTERY_CAPACITY_NORMAL; 588 589 if (sc->sc_sensor[ACPIBAT_CAPACITY].value_cur < sc->sc_wcapacity) { 590 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SWARNUNDER; 591 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 592 ENVSYS_BATTERY_CAPACITY_WARNING; 593 } 594 595 if (sc->sc_sensor[ACPIBAT_CAPACITY].value_cur < sc->sc_lcapacity) { 596 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SCRITUNDER; 597 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 598 ENVSYS_BATTERY_CAPACITY_LOW; 599 } 600 601 if ((state & ACPIBAT_ST_CRITICAL) != 0) { 602 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SCRITICAL; 603 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 604 ENVSYS_BATTERY_CAPACITY_CRITICAL; 605 } 606 607 out: 608 if (obj != NULL) 609 ACPI_FREE(obj); 610 611 if (ACPI_FAILURE(rv)) 612 aprint_error_dev(dv, "failed to evaluate _BST: %s\n", 613 AcpiFormatException(rv)); 614 } 615 616 static void 617 acpibat_update_info(void *arg) 618 { 619 device_t dv = arg; 620 struct acpibat_softc *sc = device_private(dv); 621 int i, rv; 622 623 mutex_enter(&sc->sc_mutex); 624 625 rv = acpibat_get_sta(dv); 626 627 if (rv > 0) { 628 acpibat_get_info(dv); 629 630 /* 631 * If the status changed, update the limits. 632 */ 633 if (sc->sc_present == 0 && 634 sc->sc_sensor[ACPIBAT_CAPACITY].value_max > 0) 635 sysmon_envsys_update_limits(sc->sc_sme, 636 &sc->sc_sensor[ACPIBAT_CAPACITY]); 637 } else { 638 i = (rv < 0) ? 0 : ACPIBAT_DVOLTAGE; 639 640 while (i < ACPIBAT_COUNT) { 641 sc->sc_sensor[i].state = ENVSYS_SINVALID; 642 i++; 643 } 644 } 645 646 sc->sc_present = rv; 647 648 mutex_exit(&sc->sc_mutex); 649 } 650 651 static void 652 acpibat_update_status(void *arg) 653 { 654 device_t dv = arg; 655 struct acpibat_softc *sc = device_private(dv); 656 int i, rv; 657 658 mutex_enter(&sc->sc_mutex); 659 660 rv = acpibat_get_sta(dv); 661 662 if (rv > 0) { 663 664 if (sc->sc_present == 0) 665 acpibat_get_info(dv); 666 667 acpibat_get_status(dv); 668 } else { 669 i = (rv < 0) ? 0 : ACPIBAT_DVOLTAGE; 670 671 while (i < ACPIBAT_COUNT) { 672 sc->sc_sensor[i].state = ENVSYS_SINVALID; 673 i++; 674 } 675 } 676 677 sc->sc_present = rv; 678 microtime(&sc->sc_last); 679 680 cv_broadcast(&sc->sc_condvar); 681 mutex_exit(&sc->sc_mutex); 682 } 683 684 /* 685 * acpibat_notify_handler: 686 * 687 * Callback from ACPI interrupt handler to notify us of an event. 688 */ 689 static void 690 acpibat_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context) 691 { 692 static const int handler = OSL_NOTIFY_HANDLER; 693 device_t dv = context; 694 695 switch (notify) { 696 697 case ACPI_NOTIFY_BUS_CHECK: 698 break; 699 700 case ACPI_NOTIFY_BAT_INFO: 701 case ACPI_NOTIFY_DEVICE_CHECK: 702 (void)AcpiOsExecute(handler, acpibat_update_info, dv); 703 break; 704 705 case ACPI_NOTIFY_BAT_STATUS: 706 (void)AcpiOsExecute(handler, acpibat_update_status, dv); 707 break; 708 709 default: 710 aprint_error_dev(dv, "unknown notify: 0x%02X\n", notify); 711 } 712 } 713 714 static void 715 acpibat_init_envsys(device_t dv) 716 { 717 struct acpibat_softc *sc = device_private(dv); 718 int i; 719 720 #define INITDATA(index, unit, string) \ 721 do { \ 722 sc->sc_sensor[index].state = ENVSYS_SVALID; \ 723 sc->sc_sensor[index].units = unit; \ 724 (void)strlcpy(sc->sc_sensor[index].desc, string, \ 725 sizeof(sc->sc_sensor[index].desc)); \ 726 } while (/* CONSTCOND */ 0) 727 728 INITDATA(ACPIBAT_PRESENT, ENVSYS_INDICATOR, "present"); 729 INITDATA(ACPIBAT_DCAPACITY, ENVSYS_SWATTHOUR, "design cap"); 730 INITDATA(ACPIBAT_LFCCAPACITY, ENVSYS_SWATTHOUR, "last full cap"); 731 INITDATA(ACPIBAT_DVOLTAGE, ENVSYS_SVOLTS_DC, "design voltage"); 732 INITDATA(ACPIBAT_VOLTAGE, ENVSYS_SVOLTS_DC, "voltage"); 733 INITDATA(ACPIBAT_CHARGERATE, ENVSYS_SWATTS, "charge rate"); 734 INITDATA(ACPIBAT_DISCHARGERATE, ENVSYS_SWATTS, "discharge rate"); 735 INITDATA(ACPIBAT_CAPACITY, ENVSYS_SWATTHOUR, "charge"); 736 INITDATA(ACPIBAT_CHARGING, ENVSYS_BATTERY_CHARGE, "charging"); 737 INITDATA(ACPIBAT_CHARGE_STATE, ENVSYS_BATTERY_CAPACITY, "charge state"); 738 739 #undef INITDATA 740 741 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 742 ENVSYS_BATTERY_CAPACITY_NORMAL; 743 744 sc->sc_sensor[ACPIBAT_CAPACITY].flags |= 745 ENVSYS_FPERCENT | ENVSYS_FVALID_MAX | ENVSYS_FMONLIMITS; 746 747 sc->sc_sensor[ACPIBAT_CHARGE_STATE].flags |= ENVSYS_FMONSTCHANGED; 748 749 /* Disable userland monitoring on these sensors. */ 750 sc->sc_sensor[ACPIBAT_VOLTAGE].flags = ENVSYS_FMONNOTSUPP; 751 sc->sc_sensor[ACPIBAT_CHARGERATE].flags = ENVSYS_FMONNOTSUPP; 752 sc->sc_sensor[ACPIBAT_DISCHARGERATE].flags = ENVSYS_FMONNOTSUPP; 753 sc->sc_sensor[ACPIBAT_DCAPACITY].flags = ENVSYS_FMONNOTSUPP; 754 sc->sc_sensor[ACPIBAT_LFCCAPACITY].flags = ENVSYS_FMONNOTSUPP; 755 sc->sc_sensor[ACPIBAT_DVOLTAGE].flags = ENVSYS_FMONNOTSUPP; 756 757 /* Attach rnd(9) to the (dis)charge rates. */ 758 sc->sc_sensor[ACPIBAT_CHARGERATE].flags |= ENVSYS_FHAS_ENTROPY; 759 sc->sc_sensor[ACPIBAT_DISCHARGERATE].flags |= ENVSYS_FHAS_ENTROPY; 760 761 sc->sc_sme = sysmon_envsys_create(); 762 763 for (i = 0; i < ACPIBAT_COUNT; i++) { 764 765 if (sysmon_envsys_sensor_attach(sc->sc_sme, 766 &sc->sc_sensor[i])) 767 goto fail; 768 } 769 770 sc->sc_sme->sme_name = device_xname(dv); 771 sc->sc_sme->sme_cookie = dv; 772 sc->sc_sme->sme_refresh = acpibat_refresh; 773 sc->sc_sme->sme_class = SME_CLASS_BATTERY; 774 sc->sc_sme->sme_flags = SME_POLL_ONLY | SME_INIT_REFRESH; 775 sc->sc_sme->sme_get_limits = acpibat_get_limits; 776 777 acpibat_update_info(dv); 778 acpibat_update_status(dv); 779 780 if (sysmon_envsys_register(sc->sc_sme)) 781 goto fail; 782 783 return; 784 785 fail: 786 aprint_error_dev(dv, "failed to initialize sysmon\n"); 787 788 sysmon_envsys_destroy(sc->sc_sme); 789 kmem_free(sc->sc_sensor, ACPIBAT_COUNT * sizeof(*sc->sc_sensor)); 790 791 sc->sc_sme = NULL; 792 sc->sc_sensor = NULL; 793 } 794 795 static void 796 acpibat_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 797 { 798 device_t self = sme->sme_cookie; 799 struct acpibat_softc *sc; 800 struct timeval tv, tmp; 801 ACPI_STATUS rv; 802 803 sc = device_private(self); 804 805 tmp.tv_sec = 10; 806 tmp.tv_usec = 0; 807 808 microtime(&tv); 809 timersub(&tv, &tmp, &tv); 810 811 if (timercmp(&tv, &sc->sc_last, <) != 0) 812 return; 813 814 if (mutex_tryenter(&sc->sc_mutex) == 0) 815 return; 816 817 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_status, self); 818 819 if (ACPI_SUCCESS(rv)) 820 cv_timedwait(&sc->sc_condvar, &sc->sc_mutex, hz); 821 822 mutex_exit(&sc->sc_mutex); 823 } 824 825 static bool 826 acpibat_resume(device_t dv, const pmf_qual_t *qual) 827 { 828 829 (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_info, dv); 830 (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_status, dv); 831 832 return true; 833 } 834 835 static void 836 acpibat_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 837 sysmon_envsys_lim_t *limits, uint32_t *props) 838 { 839 device_t dv = sme->sme_cookie; 840 struct acpibat_softc *sc = device_private(dv); 841 842 if (edata->sensor != ACPIBAT_CAPACITY) 843 return; 844 845 limits->sel_critmin = sc->sc_lcapacity; 846 limits->sel_warnmin = sc->sc_wcapacity; 847 848 *props |= PROP_BATTCAP | PROP_BATTWARN | PROP_DRIVER_LIMITS; 849 } 850 851 MODULE(MODULE_CLASS_DRIVER, acpibat, "sysmon_envsys"); 852 853 #ifdef _MODULE 854 #include "ioconf.c" 855 #endif 856 857 static int 858 acpibat_modcmd(modcmd_t cmd, void *aux) 859 { 860 int rv = 0; 861 862 switch (cmd) { 863 864 case MODULE_CMD_INIT: 865 866 #ifdef _MODULE 867 rv = config_init_component(cfdriver_ioconf_acpibat, 868 cfattach_ioconf_acpibat, cfdata_ioconf_acpibat); 869 #endif 870 break; 871 872 case MODULE_CMD_FINI: 873 874 #ifdef _MODULE 875 rv = config_fini_component(cfdriver_ioconf_acpibat, 876 cfattach_ioconf_acpibat, cfdata_ioconf_acpibat); 877 #endif 878 break; 879 880 default: 881 rv = ENOTTY; 882 } 883 884 return rv; 885 } 886