1 /* $NetBSD: acpi_bat.c,v 1.104 2010/08/14 05:41:22 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 1.104 2010/08/14 05:41:22 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 envsys_data_t *sc_sensor; 152 char sc_serial[64]; 153 kmutex_t sc_mutex; 154 kcondvar_t sc_condvar; 155 int32_t sc_lcapacity; 156 int32_t sc_wcapacity; 157 int sc_present; 158 }; 159 160 static const char * const bat_hid[] = { 161 "PNP0C0A", 162 NULL 163 }; 164 165 #define ACPIBAT_PWRUNIT_MA 0x00000001 /* mA not mW */ 166 #define ACPIBAT_ST_DISCHARGING 0x00000001 /* battery is discharging */ 167 #define ACPIBAT_ST_CHARGING 0x00000002 /* battery is charging */ 168 #define ACPIBAT_ST_CRITICAL 0x00000004 /* battery is critical */ 169 170 /* 171 * A value used when _BST or _BIF is temporarily unknown. 172 */ 173 #define ACPIBAT_VAL_UNKNOWN 0xFFFFFFFF 174 175 #define ACPIBAT_VAL_ISVALID(x) \ 176 (((x) != ACPIBAT_VAL_UNKNOWN) ? ENVSYS_SVALID : ENVSYS_SINVALID) 177 178 static int acpibat_match(device_t, cfdata_t, void *); 179 static void acpibat_attach(device_t, device_t, void *); 180 static int acpibat_detach(device_t, int); 181 static int acpibat_get_sta(device_t); 182 static ACPI_OBJECT *acpibat_get_object(ACPI_HANDLE, const char *, int); 183 static void acpibat_get_info(device_t); 184 static void acpibat_print_info(device_t, ACPI_OBJECT *); 185 static void acpibat_get_status(device_t); 186 static void acpibat_update_info(void *); 187 static void acpibat_update_status(void *); 188 static void acpibat_init_envsys(device_t); 189 static void acpibat_notify_handler(ACPI_HANDLE, uint32_t, void *); 190 static void acpibat_refresh(struct sysmon_envsys *, envsys_data_t *); 191 static bool acpibat_resume(device_t, const pmf_qual_t *); 192 static void acpibat_get_limits(struct sysmon_envsys *, envsys_data_t *, 193 sysmon_envsys_lim_t *, uint32_t *); 194 195 CFATTACH_DECL_NEW(acpibat, sizeof(struct acpibat_softc), 196 acpibat_match, acpibat_attach, acpibat_detach, NULL); 197 198 /* 199 * acpibat_match: 200 * 201 * Autoconfiguration `match' routine. 202 */ 203 static int 204 acpibat_match(device_t parent, cfdata_t match, void *aux) 205 { 206 struct acpi_attach_args *aa = aux; 207 208 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 209 return 0; 210 211 return acpi_match_hid(aa->aa_node->ad_devinfo, bat_hid); 212 } 213 214 /* 215 * acpibat_attach: 216 * 217 * Autoconfiguration `attach' routine. 218 */ 219 static void 220 acpibat_attach(device_t parent, device_t self, void *aux) 221 { 222 struct acpibat_softc *sc = device_private(self); 223 struct acpi_attach_args *aa = aux; 224 225 aprint_naive(": ACPI Battery\n"); 226 aprint_normal(": ACPI Battery\n"); 227 228 sc->sc_node = aa->aa_node; 229 230 sc->sc_present = 0; 231 sc->sc_lcapacity = 0; 232 sc->sc_wcapacity = 0; 233 234 sc->sc_sme = NULL; 235 sc->sc_sensor = NULL; 236 237 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_NONE); 238 cv_init(&sc->sc_condvar, device_xname(self)); 239 240 (void)pmf_device_register(self, NULL, acpibat_resume); 241 (void)memset(sc->sc_serial, '\0', sizeof(sc->sc_serial)); 242 (void)acpi_register_notify(sc->sc_node, acpibat_notify_handler); 243 244 sc->sc_sensor = kmem_zalloc(ACPIBAT_COUNT * 245 sizeof(*sc->sc_sensor), KM_SLEEP); 246 247 if (sc->sc_sensor == NULL) 248 return; 249 250 acpibat_init_envsys(self); 251 } 252 253 /* 254 * acpibat_detach: 255 * 256 * Autoconfiguration `detach' routine. 257 */ 258 static int 259 acpibat_detach(device_t self, int flags) 260 { 261 struct acpibat_softc *sc = device_private(self); 262 263 acpi_deregister_notify(sc->sc_node); 264 265 cv_destroy(&sc->sc_condvar); 266 mutex_destroy(&sc->sc_mutex); 267 268 if (sc->sc_sme != NULL) 269 sysmon_envsys_unregister(sc->sc_sme); 270 271 if (sc->sc_sensor != NULL) 272 kmem_free(sc->sc_sensor, ACPIBAT_COUNT * 273 sizeof(*sc->sc_sensor)); 274 275 pmf_device_deregister(self); 276 277 return 0; 278 } 279 280 /* 281 * acpibat_get_sta: 282 * 283 * Evaluate whether the battery is present or absent. 284 * 285 * Returns: 0 for no battery, 1 for present, and -1 on error. 286 */ 287 static int 288 acpibat_get_sta(device_t dv) 289 { 290 struct acpibat_softc *sc = device_private(dv); 291 ACPI_INTEGER val; 292 ACPI_STATUS rv; 293 294 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_STA", &val); 295 296 if (ACPI_FAILURE(rv)) { 297 aprint_error_dev(dv, "failed to evaluate _STA\n"); 298 return -1; 299 } 300 301 sc->sc_sensor[ACPIBAT_PRESENT].state = ENVSYS_SVALID; 302 303 if ((val & ACPI_STA_BATTERY_PRESENT) == 0) { 304 sc->sc_sensor[ACPIBAT_PRESENT].value_cur = 0; 305 return 0; 306 } 307 308 sc->sc_sensor[ACPIBAT_PRESENT].value_cur = 1; 309 310 return 1; 311 } 312 313 static ACPI_OBJECT * 314 acpibat_get_object(ACPI_HANDLE hdl, const char *pth, int count) 315 { 316 ACPI_OBJECT *obj; 317 ACPI_BUFFER buf; 318 ACPI_STATUS rv; 319 320 rv = acpi_eval_struct(hdl, pth, &buf); 321 322 if (ACPI_FAILURE(rv)) 323 return NULL; 324 325 obj = buf.Pointer; 326 327 if (obj->Type != ACPI_TYPE_PACKAGE) { 328 ACPI_FREE(buf.Pointer); 329 return NULL; 330 } 331 332 if (obj->Package.Count != count) { 333 ACPI_FREE(buf.Pointer); 334 return NULL; 335 } 336 337 return obj; 338 } 339 340 /* 341 * acpibat_get_info: 342 * 343 * Get the battery info. 344 */ 345 static void 346 acpibat_get_info(device_t dv) 347 { 348 struct acpibat_softc *sc = device_private(dv); 349 ACPI_HANDLE hdl = sc->sc_node->ad_handle; 350 int capunit, i, rateunit, val; 351 ACPI_OBJECT *elm, *obj; 352 ACPI_STATUS rv = AE_OK; 353 354 obj = acpibat_get_object(hdl, "_BIF", ACPIBAT_BIF_COUNT); 355 356 if (obj == NULL) { 357 rv = AE_ERROR; 358 goto out; 359 } 360 361 elm = obj->Package.Elements; 362 363 for (i = ACPIBAT_BIF_UNIT; i < ACPIBAT_BIF_MODEL; i++) { 364 365 if (elm[i].Type != ACPI_TYPE_INTEGER) { 366 rv = AE_TYPE; 367 goto out; 368 } 369 370 KDASSERT((uint64_t)elm[i].Integer.Value < INT_MAX); 371 } 372 373 if ((elm[ACPIBAT_BIF_UNIT].Integer.Value & ACPIBAT_PWRUNIT_MA) != 0) { 374 capunit = ENVSYS_SAMPHOUR; 375 rateunit = ENVSYS_SAMPS; 376 } else { 377 capunit = ENVSYS_SWATTHOUR; 378 rateunit = ENVSYS_SWATTS; 379 } 380 381 sc->sc_sensor[ACPIBAT_DCAPACITY].units = capunit; 382 sc->sc_sensor[ACPIBAT_LFCCAPACITY].units = capunit; 383 sc->sc_sensor[ACPIBAT_CHARGERATE].units = rateunit; 384 sc->sc_sensor[ACPIBAT_DISCHARGERATE].units = rateunit; 385 sc->sc_sensor[ACPIBAT_CAPACITY].units = capunit; 386 387 /* Design capacity. */ 388 val = elm[ACPIBAT_BIF_DCAPACITY].Integer.Value; 389 sc->sc_sensor[ACPIBAT_DCAPACITY].value_cur = val * 1000; 390 sc->sc_sensor[ACPIBAT_DCAPACITY].state = ACPIBAT_VAL_ISVALID(val); 391 392 /* Last full charge capacity. */ 393 val = elm[ACPIBAT_BIF_LFCCAPACITY].Integer.Value; 394 sc->sc_sensor[ACPIBAT_LFCCAPACITY].value_cur = val * 1000; 395 sc->sc_sensor[ACPIBAT_LFCCAPACITY].state = ACPIBAT_VAL_ISVALID(val); 396 397 /* Design voltage. */ 398 val = elm[ACPIBAT_BIF_DVOLTAGE].Integer.Value; 399 sc->sc_sensor[ACPIBAT_DVOLTAGE].value_cur = val * 1000; 400 sc->sc_sensor[ACPIBAT_DVOLTAGE].state = ACPIBAT_VAL_ISVALID(val); 401 402 /* Design low and warning capacity. */ 403 sc->sc_lcapacity = elm[ACPIBAT_BIF_LCAPACITY].Integer.Value * 1000; 404 sc->sc_wcapacity = elm[ACPIBAT_BIF_WCAPACITY].Integer.Value * 1000; 405 406 /* 407 * Initialize the maximum of current capacity 408 * to the last known full charge capacity. 409 */ 410 val = sc->sc_sensor[ACPIBAT_LFCCAPACITY].value_cur; 411 sc->sc_sensor[ACPIBAT_CAPACITY].value_max = val; 412 413 acpibat_print_info(dv, elm); 414 415 out: 416 if (obj != NULL) 417 ACPI_FREE(obj); 418 419 if (ACPI_FAILURE(rv)) 420 aprint_error_dev(dv, "failed to evaluate _BIF: %s\n", 421 AcpiFormatException(rv)); 422 } 423 424 /* 425 * acpibat_print_info: 426 * 427 * Display the battery info. 428 */ 429 static void 430 acpibat_print_info(device_t dv, ACPI_OBJECT *elm) 431 { 432 struct acpibat_softc *sc = device_private(dv); 433 const char *model, *serial, *tech, *unit; 434 int i; 435 436 for (i = ACPIBAT_BIF_OEM; i > ACPIBAT_BIF_GRANULARITY2; i--) { 437 438 if (elm[i].Type != ACPI_TYPE_STRING) 439 return; 440 441 if (elm[i].String.Pointer == NULL) 442 return; 443 444 if (elm[i].String.Pointer[0] == '\0') 445 return; 446 } 447 448 model = elm[ACPIBAT_BIF_MODEL].String.Pointer; 449 serial = elm[ACPIBAT_BIF_SERIAL].String.Pointer; 450 451 if (elm[ACPIBAT_BIF_SERIAL].String.Length > sizeof(sc->sc_serial)) 452 return; 453 454 if (sc->sc_serial[0] == '\0') 455 (void)strlcpy(sc->sc_serial, serial, sizeof(sc->sc_serial)); 456 else { 457 if (strcmp(sc->sc_serial, serial) == 0) 458 return; 459 460 (void)memset(sc->sc_serial, '\0', sizeof(sc->sc_serial)); 461 (void)strlcpy(sc->sc_serial, serial, sizeof(sc->sc_serial)); 462 } 463 464 tech = (elm[ACPIBAT_BIF_TECHNOLOGY].Integer.Value != 0) ? 465 "rechargeable" : "non-rechargeable"; 466 467 aprint_normal_dev(dv, "%s %s %s battery\n", 468 elm[ACPIBAT_BIF_OEM].String.Pointer, 469 elm[ACPIBAT_BIF_TYPE].String.Pointer, tech); 470 471 aprint_verbose_dev(dv, "model number %s, serial number %s\n", 472 model, serial); 473 474 #define SCALE(x) (((int)x) / 1000000), ((((int)x) % 1000000) / 1000) 475 476 /* 477 * These values are defined as follows (ACPI 4.0, p. 388): 478 * 479 * Granularity 1. "Battery capacity granularity between low 480 * and warning in [mAh] or [mWh]. That is, 481 * this is the smallest increment in capacity 482 * that the battery is capable of measuring." 483 * 484 * Granularity 2. "Battery capacity granularity between warning 485 * and full in [mAh] or [mWh]. [...]" 486 */ 487 if ((elm[ACPIBAT_BIF_UNIT].Integer.Value & ACPIBAT_PWRUNIT_MA) != 0) 488 unit = "Ah"; 489 else 490 unit = "Wh"; 491 492 aprint_verbose_dev(dv, "granularity: " 493 "low->warn %d.%03d %s, warn->full %d.%03d %s\n", 494 SCALE(elm[ACPIBAT_BIF_GRANULARITY1].Integer.Value * 1000), unit, 495 SCALE(elm[ACPIBAT_BIF_GRANULARITY2].Integer.Value * 1000), unit); 496 } 497 498 /* 499 * acpibat_get_status: 500 * 501 * Get the current battery status. 502 */ 503 static void 504 acpibat_get_status(device_t dv) 505 { 506 struct acpibat_softc *sc = device_private(dv); 507 ACPI_HANDLE hdl = sc->sc_node->ad_handle; 508 int i, rate, state, val; 509 ACPI_OBJECT *elm, *obj; 510 ACPI_STATUS rv = AE_OK; 511 512 obj = acpibat_get_object(hdl, "_BST", ACPIBAT_BST_COUNT); 513 514 if (obj == NULL) { 515 rv = AE_ERROR; 516 goto out; 517 } 518 519 elm = obj->Package.Elements; 520 521 for (i = ACPIBAT_BST_STATE; i < ACPIBAT_BST_COUNT; i++) { 522 523 if (elm[i].Type != ACPI_TYPE_INTEGER) { 524 rv = AE_TYPE; 525 goto out; 526 } 527 } 528 529 state = elm[ACPIBAT_BST_STATE].Integer.Value; 530 531 if ((state & ACPIBAT_ST_CHARGING) != 0) { 532 /* XXX rate can be invalid */ 533 rate = elm[ACPIBAT_BST_RATE].Integer.Value; 534 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SVALID; 535 sc->sc_sensor[ACPIBAT_CHARGERATE].value_cur = rate * 1000; 536 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SINVALID; 537 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 538 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 1; 539 } else if ((state & ACPIBAT_ST_DISCHARGING) != 0) { 540 rate = elm[ACPIBAT_BST_RATE].Integer.Value; 541 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SVALID; 542 sc->sc_sensor[ACPIBAT_DISCHARGERATE].value_cur = rate * 1000; 543 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SINVALID; 544 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 545 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 0; 546 } else { 547 sc->sc_sensor[ACPIBAT_CHARGING].state = ENVSYS_SVALID; 548 sc->sc_sensor[ACPIBAT_CHARGING].value_cur = 0; 549 sc->sc_sensor[ACPIBAT_CHARGERATE].state = ENVSYS_SINVALID; 550 sc->sc_sensor[ACPIBAT_DISCHARGERATE].state = ENVSYS_SINVALID; 551 } 552 553 /* Remaining capacity. */ 554 val = elm[ACPIBAT_BST_CAPACITY].Integer.Value; 555 sc->sc_sensor[ACPIBAT_CAPACITY].value_cur = val * 1000; 556 sc->sc_sensor[ACPIBAT_CAPACITY].state = ACPIBAT_VAL_ISVALID(val); 557 558 /* Battery voltage. */ 559 val = elm[ACPIBAT_BST_VOLTAGE].Integer.Value; 560 sc->sc_sensor[ACPIBAT_VOLTAGE].value_cur = val * 1000; 561 sc->sc_sensor[ACPIBAT_VOLTAGE].state = ACPIBAT_VAL_ISVALID(val); 562 563 sc->sc_sensor[ACPIBAT_CHARGE_STATE].state = ENVSYS_SVALID; 564 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 565 ENVSYS_BATTERY_CAPACITY_NORMAL; 566 567 if (sc->sc_sensor[ACPIBAT_CAPACITY].value_cur < sc->sc_wcapacity) { 568 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SWARNUNDER; 569 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 570 ENVSYS_BATTERY_CAPACITY_WARNING; 571 } 572 573 if (sc->sc_sensor[ACPIBAT_CAPACITY].value_cur < sc->sc_lcapacity) { 574 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SCRITUNDER; 575 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 576 ENVSYS_BATTERY_CAPACITY_LOW; 577 } 578 579 if ((state & ACPIBAT_ST_CRITICAL) != 0) { 580 sc->sc_sensor[ACPIBAT_CAPACITY].state = ENVSYS_SCRITICAL; 581 sc->sc_sensor[ACPIBAT_CHARGE_STATE].value_cur = 582 ENVSYS_BATTERY_CAPACITY_CRITICAL; 583 } 584 585 out: 586 if (obj != NULL) 587 ACPI_FREE(obj); 588 589 if (ACPI_FAILURE(rv)) 590 aprint_error_dev(dv, "failed to evaluate _BST: %s\n", 591 AcpiFormatException(rv)); 592 } 593 594 static void 595 acpibat_update_info(void *arg) 596 { 597 device_t dv = arg; 598 struct acpibat_softc *sc = device_private(dv); 599 int i, rv; 600 601 mutex_enter(&sc->sc_mutex); 602 603 rv = acpibat_get_sta(dv); 604 605 if (rv > 0) { 606 acpibat_get_info(dv); 607 608 /* 609 * If the status changed, update the limits. 610 */ 611 if (sc->sc_present == 0 && 612 sc->sc_sensor[ACPIBAT_CAPACITY].value_max > 0) 613 sysmon_envsys_update_limits(sc->sc_sme, 614 &sc->sc_sensor[ACPIBAT_CAPACITY]); 615 } else { 616 i = (rv < 0) ? 0 : ACPIBAT_DVOLTAGE; 617 618 while (i < ACPIBAT_COUNT) { 619 sc->sc_sensor[i].state = ENVSYS_SINVALID; 620 i++; 621 } 622 } 623 624 sc->sc_present = rv; 625 626 mutex_exit(&sc->sc_mutex); 627 } 628 629 static void 630 acpibat_update_status(void *arg) 631 { 632 device_t dv = arg; 633 struct acpibat_softc *sc = device_private(dv); 634 int i, rv; 635 636 mutex_enter(&sc->sc_mutex); 637 638 rv = acpibat_get_sta(dv); 639 640 if (rv > 0) { 641 642 if (sc->sc_present == 0) 643 acpibat_get_info(dv); 644 645 acpibat_get_status(dv); 646 } else { 647 i = (rv < 0) ? 0 : ACPIBAT_DVOLTAGE; 648 649 while (i < ACPIBAT_COUNT) { 650 sc->sc_sensor[i].state = ENVSYS_SINVALID; 651 i++; 652 } 653 } 654 655 sc->sc_present = rv; 656 657 cv_broadcast(&sc->sc_condvar); 658 mutex_exit(&sc->sc_mutex); 659 } 660 661 /* 662 * acpibat_notify_handler: 663 * 664 * Callback from ACPI interrupt handler to notify us of an event. 665 */ 666 static void 667 acpibat_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context) 668 { 669 static const int handler = OSL_NOTIFY_HANDLER; 670 device_t dv = context; 671 672 switch (notify) { 673 674 case ACPI_NOTIFY_BUS_CHECK: 675 break; 676 677 case ACPI_NOTIFY_BAT_INFO: 678 case ACPI_NOTIFY_DEVICE_CHECK: 679 (void)AcpiOsExecute(handler, acpibat_update_info, dv); 680 break; 681 682 case ACPI_NOTIFY_BAT_STATUS: 683 (void)AcpiOsExecute(handler, acpibat_update_status, dv); 684 break; 685 686 default: 687 aprint_error_dev(dv, "unknown notify: 0x%02X\n", notify); 688 } 689 } 690 691 static void 692 acpibat_init_envsys(device_t dv) 693 { 694 struct acpibat_softc *sc = device_private(dv); 695 int i; 696 697 #define INITDATA(index, unit, string) \ 698 do { \ 699 sc->sc_sensor[index].state = ENVSYS_SVALID; \ 700 sc->sc_sensor[index].units = unit; \ 701 (void)strlcpy(sc->sc_sensor[index].desc, string, \ 702 sizeof(sc->sc_sensor[index].desc)); \ 703 } while (/* CONSTCOND */ 0) 704 705 INITDATA(ACPIBAT_PRESENT, ENVSYS_INDICATOR, "present"); 706 INITDATA(ACPIBAT_DCAPACITY, ENVSYS_SWATTHOUR, "design cap"); 707 INITDATA(ACPIBAT_LFCCAPACITY, ENVSYS_SWATTHOUR, "last full cap"); 708 INITDATA(ACPIBAT_DVOLTAGE, ENVSYS_SVOLTS_DC, "design voltage"); 709 INITDATA(ACPIBAT_VOLTAGE, ENVSYS_SVOLTS_DC, "voltage"); 710 INITDATA(ACPIBAT_CHARGERATE, ENVSYS_SWATTS, "charge rate"); 711 INITDATA(ACPIBAT_DISCHARGERATE, ENVSYS_SWATTS, "discharge rate"); 712 INITDATA(ACPIBAT_CAPACITY, ENVSYS_SWATTHOUR, "charge"); 713 INITDATA(ACPIBAT_CHARGING, ENVSYS_BATTERY_CHARGE, "charging"); 714 INITDATA(ACPIBAT_CHARGE_STATE, ENVSYS_BATTERY_CAPACITY, "charge state"); 715 716 #undef INITDATA 717 718 sc->sc_sensor[ACPIBAT_CAPACITY].flags |= 719 ENVSYS_FPERCENT | ENVSYS_FVALID_MAX | ENVSYS_FMONLIMITS; 720 721 sc->sc_sensor[ACPIBAT_CHARGE_STATE].flags |= ENVSYS_FMONSTCHANGED; 722 723 /* Disable userland monitoring on these sensors. */ 724 sc->sc_sensor[ACPIBAT_VOLTAGE].flags = ENVSYS_FMONNOTSUPP; 725 sc->sc_sensor[ACPIBAT_CHARGERATE].flags = ENVSYS_FMONNOTSUPP; 726 sc->sc_sensor[ACPIBAT_DISCHARGERATE].flags = ENVSYS_FMONNOTSUPP; 727 sc->sc_sensor[ACPIBAT_DCAPACITY].flags = ENVSYS_FMONNOTSUPP; 728 sc->sc_sensor[ACPIBAT_LFCCAPACITY].flags = ENVSYS_FMONNOTSUPP; 729 sc->sc_sensor[ACPIBAT_DVOLTAGE].flags = ENVSYS_FMONNOTSUPP; 730 731 sc->sc_sme = sysmon_envsys_create(); 732 733 for (i = 0; i < ACPIBAT_COUNT; i++) { 734 735 if (sysmon_envsys_sensor_attach(sc->sc_sme, 736 &sc->sc_sensor[i])) 737 goto fail; 738 } 739 740 sc->sc_sme->sme_name = device_xname(dv); 741 sc->sc_sme->sme_cookie = dv; 742 sc->sc_sme->sme_refresh = acpibat_refresh; 743 sc->sc_sme->sme_class = SME_CLASS_BATTERY; 744 sc->sc_sme->sme_flags = SME_POLL_ONLY | SME_INIT_REFRESH; 745 sc->sc_sme->sme_get_limits = acpibat_get_limits; 746 747 acpibat_update_info(dv); 748 acpibat_update_status(dv); 749 750 if (sysmon_envsys_register(sc->sc_sme)) 751 goto fail; 752 753 return; 754 755 fail: 756 aprint_error_dev(dv, "failed to initialize sysmon\n"); 757 758 sysmon_envsys_destroy(sc->sc_sme); 759 kmem_free(sc->sc_sensor, ACPIBAT_COUNT * sizeof(*sc->sc_sensor)); 760 761 sc->sc_sme = NULL; 762 sc->sc_sensor = NULL; 763 } 764 765 static void 766 acpibat_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 767 { 768 device_t dv = sme->sme_cookie; 769 struct acpibat_softc *sc = device_private(dv); 770 ACPI_STATUS rv; 771 772 if (mutex_tryenter(&sc->sc_mutex) == 0) 773 return; 774 775 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, acpibat_update_status, dv); 776 777 if (ACPI_SUCCESS(rv)) 778 cv_timedwait(&sc->sc_condvar, &sc->sc_mutex, hz); 779 780 mutex_exit(&sc->sc_mutex); 781 } 782 783 static bool 784 acpibat_resume(device_t dv, const pmf_qual_t *qual) 785 { 786 787 acpibat_update_info(dv); 788 acpibat_update_status(dv); 789 790 return true; 791 } 792 793 static void 794 acpibat_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 795 sysmon_envsys_lim_t *limits, uint32_t *props) 796 { 797 device_t dv = sme->sme_cookie; 798 struct acpibat_softc *sc = device_private(dv); 799 800 if (edata->sensor != ACPIBAT_CAPACITY) 801 return; 802 803 limits->sel_critmin = sc->sc_lcapacity; 804 limits->sel_warnmin = sc->sc_wcapacity; 805 806 *props |= PROP_BATTCAP | PROP_BATTWARN | PROP_DRIVER_LIMITS; 807 } 808 809 #ifdef _MODULE 810 811 MODULE(MODULE_CLASS_DRIVER, acpibat, NULL); 812 813 #include "ioconf.c" 814 815 static int 816 acpibat_modcmd(modcmd_t cmd, void *context) 817 { 818 819 switch (cmd) { 820 821 case MODULE_CMD_INIT: 822 return config_init_component(cfdriver_ioconf_acpibat, 823 cfattach_ioconf_acpibat, cfdata_ioconf_acpibat); 824 825 case MODULE_CMD_FINI: 826 return config_fini_component(cfdriver_ioconf_acpibat, 827 cfattach_ioconf_acpibat, cfdata_ioconf_acpibat); 828 829 default: 830 return ENOTTY; 831 } 832 } 833 834 #endif /* _MODULE */ 835