1 /* $NetBSD: wmi_acpi.c,v 1.15 2017/06/01 02:45:09 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 2009, 2010 Jukka Ruohonen <jruohonen@iki.fi> 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 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: wmi_acpi.c,v 1.15 2017/06/01 02:45:09 chs Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/device.h> 34 #include <sys/endian.h> 35 #include <sys/kmem.h> 36 #include <sys/systm.h> 37 #include <sys/module.h> 38 39 #include <dev/acpi/acpireg.h> 40 #include <dev/acpi/acpivar.h> 41 #include <dev/acpi/acpi_ecvar.h> 42 #include <dev/acpi/wmi/wmi_acpivar.h> 43 44 #define _COMPONENT ACPI_RESOURCE_COMPONENT 45 ACPI_MODULE_NAME ("wmi_acpi") 46 47 /* 48 * This implements something called "Microsoft Windows Management 49 * Instrumentation" (WMI). This subset of ACPI is desribed in: 50 * 51 * http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx 52 * 53 * (Obtained on Thu Feb 12 18:21:44 EET 2009.) 54 */ 55 56 static int acpi_wmi_match(device_t, cfdata_t, void *); 57 static void acpi_wmi_attach(device_t, device_t, void *); 58 static int acpi_wmi_detach(device_t, int); 59 static int acpi_wmi_rescan(device_t, const char *, const int *); 60 static void acpi_wmi_childdet(device_t, device_t); 61 static int acpi_wmi_print(void *, const char *); 62 static bool acpi_wmi_init(struct acpi_wmi_softc *); 63 static void acpi_wmi_init_ec(struct acpi_wmi_softc *); 64 static void acpi_wmi_add(struct acpi_wmi_softc *, ACPI_OBJECT *); 65 static void acpi_wmi_del(struct acpi_wmi_softc *); 66 static void acpi_wmi_dump(struct acpi_wmi_softc *); 67 static ACPI_STATUS acpi_wmi_guid_get(struct acpi_wmi_softc *, 68 const char *, struct wmi_t **); 69 static void acpi_wmi_event_add(struct acpi_wmi_softc *); 70 static void acpi_wmi_event_del(struct acpi_wmi_softc *); 71 static void acpi_wmi_event_handler(ACPI_HANDLE, uint32_t, void *); 72 static ACPI_STATUS acpi_wmi_ec_handler(uint32_t, ACPI_PHYSICAL_ADDRESS, 73 uint32_t, ACPI_INTEGER *, void *, void *); 74 static bool acpi_wmi_suspend(device_t, const pmf_qual_t *); 75 static bool acpi_wmi_resume(device_t, const pmf_qual_t *); 76 static ACPI_STATUS acpi_wmi_enable_event(ACPI_HANDLE, uint8_t, bool); 77 static ACPI_STATUS acpi_wmi_enable_collection(ACPI_HANDLE, const char *, bool); 78 static bool acpi_wmi_input(struct wmi_t *, uint8_t, uint8_t); 79 80 const char * const acpi_wmi_ids[] = { 81 "PNP0C14", 82 "pnp0c14", 83 NULL 84 }; 85 86 CFATTACH_DECL2_NEW(acpiwmi, sizeof(struct acpi_wmi_softc), 87 acpi_wmi_match, acpi_wmi_attach, acpi_wmi_detach, NULL, 88 acpi_wmi_rescan, acpi_wmi_childdet); 89 90 static int 91 acpi_wmi_match(device_t parent, cfdata_t match, void *aux) 92 { 93 struct acpi_attach_args *aa = aux; 94 95 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 96 return 0; 97 98 return acpi_match_hid(aa->aa_node->ad_devinfo, acpi_wmi_ids); 99 } 100 101 static void 102 acpi_wmi_attach(device_t parent, device_t self, void *aux) 103 { 104 struct acpi_wmi_softc *sc = device_private(self); 105 struct acpi_attach_args *aa = aux; 106 107 sc->sc_dev = self; 108 sc->sc_node = aa->aa_node; 109 110 sc->sc_child = NULL; 111 sc->sc_ecdev = NULL; 112 sc->sc_handler = NULL; 113 114 aprint_naive("\n"); 115 aprint_normal(": ACPI WMI Interface\n"); 116 117 if (acpi_wmi_init(sc) != true) 118 return; 119 120 acpi_wmi_dump(sc); 121 acpi_wmi_init_ec(sc); 122 acpi_wmi_event_add(sc); 123 acpi_wmi_rescan(self, NULL, NULL); 124 125 (void)pmf_device_register(self, acpi_wmi_suspend, acpi_wmi_resume); 126 } 127 128 static int 129 acpi_wmi_detach(device_t self, int flags) 130 { 131 struct acpi_wmi_softc *sc = device_private(self); 132 133 acpi_wmi_event_del(sc); 134 135 if (sc->sc_ecdev != NULL) { 136 137 (void)AcpiRemoveAddressSpaceHandler(sc->sc_node->ad_handle, 138 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler); 139 } 140 141 if (sc->sc_child != NULL) 142 (void)config_detach(sc->sc_child, flags); 143 144 acpi_wmi_del(sc); 145 pmf_device_deregister(self); 146 147 return 0; 148 } 149 150 static int 151 acpi_wmi_rescan(device_t self, const char *ifattr, const int *locators) 152 { 153 struct acpi_wmi_softc *sc = device_private(self); 154 155 if (ifattr_match(ifattr, "acpiwmibus") && sc->sc_child == NULL) 156 sc->sc_child = config_found_ia(self, "acpiwmibus", 157 NULL, acpi_wmi_print); 158 159 return 0; 160 } 161 162 static void 163 acpi_wmi_childdet(device_t self, device_t child) 164 { 165 struct acpi_wmi_softc *sc = device_private(self); 166 167 if (sc->sc_child == child) 168 sc->sc_child = NULL; 169 } 170 171 static int 172 acpi_wmi_print(void *aux, const char *pnp) 173 { 174 175 if (pnp != NULL) 176 aprint_normal("acpiwmibus at %s", pnp); 177 178 return UNCONF; 179 } 180 181 static bool 182 acpi_wmi_init(struct acpi_wmi_softc *sc) 183 { 184 ACPI_OBJECT *obj; 185 ACPI_BUFFER buf; 186 ACPI_STATUS rv; 187 uint32_t len; 188 189 rv = acpi_eval_struct(sc->sc_node->ad_handle, "_WDG", &buf); 190 191 if (ACPI_FAILURE(rv)) 192 goto fail; 193 194 obj = buf.Pointer; 195 196 if (obj->Type != ACPI_TYPE_BUFFER) { 197 rv = AE_TYPE; 198 goto fail; 199 } 200 201 len = obj->Buffer.Length; 202 203 if (len != obj->Package.Count) { 204 rv = AE_BAD_VALUE; 205 goto fail; 206 } 207 208 CTASSERT(sizeof(struct guid_t) == 20); 209 210 if (len < sizeof(struct guid_t) || 211 len % sizeof(struct guid_t) != 0) { 212 rv = AE_BAD_DATA; 213 goto fail; 214 } 215 216 acpi_wmi_add(sc, obj); 217 return true; 218 219 fail: 220 aprint_error_dev(sc->sc_dev, "failed to evaluate _WDG: %s\n", 221 AcpiFormatException(rv)); 222 223 if (buf.Pointer != NULL) 224 ACPI_FREE(buf.Pointer); 225 226 return false; 227 } 228 229 static void 230 acpi_wmi_add(struct acpi_wmi_softc *sc, ACPI_OBJECT *obj) 231 { 232 struct wmi_t *wmi; 233 size_t i, n, offset, siz; 234 235 siz = sizeof(struct guid_t); 236 n = obj->Buffer.Length / siz; 237 238 SIMPLEQ_INIT(&sc->wmi_head); 239 240 for (i = offset = 0; i < n; ++i) { 241 242 wmi = kmem_zalloc(sizeof(*wmi), KM_SLEEP); 243 (void)memcpy(&wmi->guid, obj->Buffer.Pointer + offset, siz); 244 245 wmi->eevent = false; 246 offset = offset + siz; 247 248 SIMPLEQ_INSERT_TAIL(&sc->wmi_head, wmi, wmi_link); 249 } 250 251 ACPI_FREE(obj); 252 } 253 254 static void 255 acpi_wmi_del(struct acpi_wmi_softc *sc) 256 { 257 struct wmi_t *wmi; 258 259 while (SIMPLEQ_FIRST(&sc->wmi_head) != NULL) { 260 wmi = SIMPLEQ_FIRST(&sc->wmi_head); 261 SIMPLEQ_REMOVE_HEAD(&sc->wmi_head, wmi_link); 262 kmem_free(wmi, sizeof(*wmi)); 263 } 264 } 265 266 static void 267 acpi_wmi_dump(struct acpi_wmi_softc *sc) 268 { 269 struct wmi_t *wmi; 270 271 KASSERT(SIMPLEQ_EMPTY(&sc->wmi_head) == 0); 272 273 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 274 275 aprint_debug_dev(sc->sc_dev, "{%08X-%04X-%04X-", 276 wmi->guid.data1, wmi->guid.data2, wmi->guid.data3); 277 278 aprint_debug("%02X%02X-%02X%02X%02X%02X%02X%02X} ", 279 wmi->guid.data4[0], wmi->guid.data4[1], 280 wmi->guid.data4[2], wmi->guid.data4[3], 281 wmi->guid.data4[4], wmi->guid.data4[5], 282 wmi->guid.data4[6], wmi->guid.data4[7]); 283 284 aprint_debug("oid %04X count %02X flags %02X\n", 285 UGET16(wmi->guid.oid), wmi->guid.count, wmi->guid.flags); 286 } 287 } 288 289 static void 290 acpi_wmi_init_ec(struct acpi_wmi_softc *sc) 291 { 292 ACPI_STATUS rv; 293 deviter_t i; 294 device_t d; 295 296 d = deviter_first(&i, DEVITER_F_ROOT_FIRST); 297 298 for (; d != NULL; d = deviter_next(&i)) { 299 300 if (device_is_a(d, "acpiec") != false || 301 device_is_a(d, "acpiecdt") != false) { 302 sc->sc_ecdev = d; 303 break; 304 } 305 } 306 307 deviter_release(&i); 308 309 if (sc->sc_ecdev == NULL) 310 return; 311 312 rv = AcpiInstallAddressSpaceHandler(sc->sc_node->ad_handle, 313 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler, NULL, sc); 314 315 if (ACPI_FAILURE(rv)) 316 sc->sc_ecdev = NULL; 317 } 318 319 static ACPI_STATUS 320 acpi_wmi_guid_get(struct acpi_wmi_softc *sc, 321 const char *src, struct wmi_t **out) 322 { 323 struct wmi_t *wmi; 324 struct guid_t *guid; 325 char bin[16]; 326 char hex[2]; 327 const char *ptr; 328 uint8_t i; 329 330 if (sc == NULL || src == NULL || strlen(src) != 36) 331 return AE_BAD_PARAMETER; 332 333 for (ptr = src, i = 0; i < 16; i++) { 334 335 if (*ptr == '-') 336 ptr++; 337 338 (void)memcpy(hex, ptr, 2); 339 340 if (HEXCHAR(hex[0]) == 0 || HEXCHAR(hex[1]) == 0) 341 return AE_BAD_HEX_CONSTANT; 342 343 bin[i] = strtoul(hex, NULL, 16) & 0xFF; 344 345 ptr++; 346 ptr++; 347 } 348 349 guid = (struct guid_t *)bin; 350 guid->data1 = be32toh(guid->data1); 351 guid->data2 = be16toh(guid->data2); 352 guid->data3 = be16toh(guid->data3); 353 354 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 355 356 if (GUIDCMP(guid, &wmi->guid) != 0) { 357 358 if (out != NULL) 359 *out = wmi; 360 361 return AE_OK; 362 } 363 } 364 365 return AE_NOT_FOUND; 366 } 367 368 /* 369 * Checks if a GUID is present. Child devices 370 * can use this in their autoconf(9) routines. 371 */ 372 int 373 acpi_wmi_guid_match(device_t self, const char *guid) 374 { 375 struct acpi_wmi_softc *sc = device_private(self); 376 ACPI_STATUS rv; 377 378 rv = acpi_wmi_guid_get(sc, guid, NULL); 379 380 if (ACPI_SUCCESS(rv)) 381 return 1; 382 383 return 0; 384 } 385 386 /* 387 * Adds internal event handler. 388 */ 389 static void 390 acpi_wmi_event_add(struct acpi_wmi_softc *sc) 391 { 392 struct wmi_t *wmi; 393 ACPI_STATUS rv; 394 395 if (acpi_register_notify(sc->sc_node, acpi_wmi_event_handler) != true) 396 return; 397 398 /* 399 * Enable possible events, expensive or otherwise. 400 */ 401 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 402 403 if ((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) != 0) { 404 405 rv = acpi_wmi_enable_event(sc->sc_node->ad_handle, 406 wmi->guid.nid, true); 407 408 if (ACPI_SUCCESS(rv)) { 409 wmi->eevent = true; 410 continue; 411 } 412 413 aprint_debug_dev(sc->sc_dev, "failed to enable " 414 "expensive WExx: %s\n", AcpiFormatException(rv)); 415 } 416 } 417 } 418 419 /* 420 * Removes the internal event handler. 421 */ 422 static void 423 acpi_wmi_event_del(struct acpi_wmi_softc *sc) 424 { 425 struct wmi_t *wmi; 426 ACPI_STATUS rv; 427 428 acpi_deregister_notify(sc->sc_node); 429 430 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 431 432 if (wmi->eevent != true) 433 continue; 434 435 KASSERT((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) != 0); 436 437 rv = acpi_wmi_enable_event(sc->sc_node->ad_handle, 438 wmi->guid.nid, false); 439 440 if (ACPI_SUCCESS(rv)) { 441 wmi->eevent = false; 442 continue; 443 } 444 445 aprint_debug_dev(sc->sc_dev, "failed to disable " 446 "expensive WExx: %s\n", AcpiFormatException(rv)); 447 } 448 } 449 450 /* 451 * Returns extra information possibly associated with an event. 452 */ 453 ACPI_STATUS 454 acpi_wmi_event_get(device_t self, uint32_t event, ACPI_BUFFER *obuf) 455 { 456 struct acpi_wmi_softc *sc = device_private(self); 457 struct wmi_t *wmi; 458 ACPI_OBJECT_LIST arg; 459 ACPI_OBJECT obj; 460 ACPI_HANDLE hdl; 461 462 if (sc == NULL || obuf == NULL) 463 return AE_BAD_PARAMETER; 464 465 if (sc->sc_handler == NULL) 466 return AE_ABORT_METHOD; 467 468 hdl = sc->sc_node->ad_handle; 469 470 obj.Type = ACPI_TYPE_INTEGER; 471 obj.Integer.Value = event; 472 473 arg.Count = 0x01; 474 arg.Pointer = &obj; 475 476 obuf->Pointer = NULL; 477 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 478 479 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 480 481 if ((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) == 0) 482 continue; 483 484 if (wmi->guid.nid != event) 485 continue; 486 487 return AcpiEvaluateObject(hdl, "_WED", &arg, obuf); 488 } 489 490 return AE_NOT_FOUND; 491 } 492 493 /* 494 * Forwards events to the external handler through the internal one. 495 */ 496 static void 497 acpi_wmi_event_handler(ACPI_HANDLE hdl, uint32_t evt, void *aux) 498 { 499 struct acpi_wmi_softc *sc; 500 device_t self = aux; 501 502 sc = device_private(self); 503 504 if (sc->sc_child == NULL) 505 return; 506 507 if (sc->sc_handler == NULL) 508 return; 509 510 (*sc->sc_handler)(NULL, evt, sc->sc_child); 511 } 512 513 ACPI_STATUS 514 acpi_wmi_event_register(device_t self, ACPI_NOTIFY_HANDLER handler) 515 { 516 struct acpi_wmi_softc *sc = device_private(self); 517 518 if (sc == NULL) 519 return AE_BAD_PARAMETER; 520 521 if (handler != NULL && sc->sc_handler != NULL) 522 return AE_ALREADY_EXISTS; 523 524 sc->sc_handler = handler; 525 526 return AE_OK; 527 } 528 529 ACPI_STATUS 530 acpi_wmi_event_deregister(device_t self) 531 { 532 return acpi_wmi_event_register(self, NULL); 533 } 534 535 /* 536 * Handler for EC regions, which may be embedded in WMI. 537 */ 538 static ACPI_STATUS 539 acpi_wmi_ec_handler(uint32_t func, ACPI_PHYSICAL_ADDRESS addr, 540 uint32_t width, ACPI_INTEGER *val, void *setup, void *aux) 541 { 542 struct acpi_wmi_softc *sc = aux; 543 544 if (aux == NULL || val == NULL) 545 return AE_BAD_PARAMETER; 546 547 if (addr > 0xFF || width % 8 != 0) 548 return AE_BAD_ADDRESS; 549 550 switch (func) { 551 552 case ACPI_READ: 553 (void)acpiec_bus_read(sc->sc_ecdev, addr, val, width); 554 break; 555 556 case ACPI_WRITE: 557 (void)acpiec_bus_write(sc->sc_ecdev, addr, *val, width); 558 break; 559 560 default: 561 return AE_BAD_PARAMETER; 562 } 563 564 return AE_OK; 565 } 566 567 /* 568 * As there is no prior knowledge about the expensive 569 * events that cause "significant overhead", try to 570 * disable (enable) these before suspending (resuming). 571 */ 572 static bool 573 acpi_wmi_suspend(device_t self, const pmf_qual_t *qual) 574 { 575 struct acpi_wmi_softc *sc = device_private(self); 576 577 acpi_wmi_event_del(sc); 578 579 return true; 580 } 581 582 static bool 583 acpi_wmi_resume(device_t self, const pmf_qual_t *qual) 584 { 585 struct acpi_wmi_softc *sc = device_private(self); 586 587 acpi_wmi_event_add(sc); 588 589 return true; 590 } 591 592 static ACPI_STATUS 593 acpi_wmi_enable_event(ACPI_HANDLE hdl, uint8_t nid, bool flag) 594 { 595 char path[5]; 596 597 snprintf(path, sizeof(path), "WE%02X", nid); 598 599 return acpi_eval_set_integer(hdl, path, (flag != false) ? 0x01 : 0x00); 600 } 601 602 static ACPI_STATUS 603 acpi_wmi_enable_collection(ACPI_HANDLE hdl, const char *oid, bool flag) 604 { 605 char path[5]; 606 607 strlcpy(path, "WC", sizeof(path)); 608 strlcat(path, oid, sizeof(path)); 609 610 return acpi_eval_set_integer(hdl, path, (flag != false) ? 0x01 : 0x00); 611 } 612 613 static bool 614 acpi_wmi_input(struct wmi_t *wmi, uint8_t flag, uint8_t idx) 615 { 616 617 if ((wmi->guid.flags & flag) == 0) 618 return false; 619 620 if (wmi->guid.count == 0x00) 621 return false; 622 623 if (wmi->guid.count < idx) 624 return false; 625 626 return true; 627 } 628 629 /* 630 * Makes a WMI data block query (WQxx). The corresponding control 631 * method for data collection will be invoked if it is available. 632 */ 633 ACPI_STATUS 634 acpi_wmi_data_query(device_t self, const char *guid, 635 uint8_t idx, ACPI_BUFFER *obuf) 636 { 637 struct acpi_wmi_softc *sc = device_private(self); 638 struct wmi_t *wmi; 639 char path[5] = "WQ"; 640 ACPI_OBJECT_LIST arg; 641 ACPI_STATUS rv, rvxx; 642 ACPI_OBJECT obj; 643 644 rvxx = AE_SUPPORT; 645 646 if (obuf == NULL) 647 return AE_BAD_PARAMETER; 648 649 rv = acpi_wmi_guid_get(sc, guid, &wmi); 650 651 if (ACPI_FAILURE(rv)) 652 return rv; 653 654 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) 655 return AE_BAD_DATA; 656 657 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 658 659 obj.Type = ACPI_TYPE_INTEGER; 660 obj.Integer.Value = idx; 661 662 arg.Count = 0x01; 663 arg.Pointer = &obj; 664 665 obuf->Pointer = NULL; 666 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 667 668 /* 669 * If the expensive flag is set, we should enable 670 * data collection before evaluating the WQxx buffer. 671 */ 672 if ((wmi->guid.flags & ACPI_WMI_FLAG_EXPENSIVE) != 0) { 673 674 rvxx = acpi_wmi_enable_collection(sc->sc_node->ad_handle, 675 wmi->guid.oid, true); 676 } 677 678 rv = AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); 679 680 /* No longer needed. */ 681 if (ACPI_SUCCESS(rvxx)) { 682 683 (void)acpi_wmi_enable_collection(sc->sc_node->ad_handle, 684 wmi->guid.oid, false); 685 } 686 687 #ifdef DIAGNOSTIC 688 /* 689 * XXX: It appears that quite a few laptops have WQxx 690 * methods that are declared as expensive, but lack the 691 * corresponding WCxx control method. 692 * 693 * -- Acer Aspire One is one example <jruohonen@iki.fi>. 694 */ 695 if (ACPI_FAILURE(rvxx) && rvxx != AE_SUPPORT) 696 aprint_error_dev(sc->sc_dev, "failed to evaluate WCxx " 697 "for %s: %s\n", path, AcpiFormatException(rvxx)); 698 #endif 699 return rv; 700 } 701 702 /* 703 * Writes to a data block (WSxx). 704 */ 705 ACPI_STATUS 706 acpi_wmi_data_write(device_t self, const char *guid, 707 uint8_t idx, ACPI_BUFFER *ibuf) 708 { 709 struct acpi_wmi_softc *sc = device_private(self); 710 struct wmi_t *wmi; 711 ACPI_OBJECT_LIST arg; 712 ACPI_OBJECT obj[2]; 713 char path[5] = "WS"; 714 ACPI_STATUS rv; 715 716 if (ibuf == NULL) 717 return AE_BAD_PARAMETER; 718 719 rv = acpi_wmi_guid_get(sc, guid, &wmi); 720 721 if (ACPI_FAILURE(rv)) 722 return rv; 723 724 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) 725 return AE_BAD_DATA; 726 727 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 728 729 obj[0].Integer.Value = idx; 730 obj[0].Type = ACPI_TYPE_INTEGER; 731 732 obj[1].Buffer.Length = ibuf->Length; 733 obj[1].Buffer.Pointer = ibuf->Pointer; 734 735 obj[1].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? 736 ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; 737 738 arg.Count = 0x02; 739 arg.Pointer = obj; 740 741 return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, NULL); 742 } 743 744 /* 745 * Executes a method (WMxx). 746 */ 747 ACPI_STATUS 748 acpi_wmi_method(device_t self, const char *guid, uint8_t idx, 749 uint32_t mid, ACPI_BUFFER *ibuf, ACPI_BUFFER *obuf) 750 { 751 struct acpi_wmi_softc *sc = device_private(self); 752 struct wmi_t *wmi; 753 ACPI_OBJECT_LIST arg; 754 ACPI_OBJECT obj[3]; 755 char path[5] = "WM"; 756 ACPI_STATUS rv; 757 758 if (ibuf == NULL || obuf == NULL) 759 return AE_BAD_PARAMETER; 760 761 rv = acpi_wmi_guid_get(sc, guid, &wmi); 762 763 if (ACPI_FAILURE(rv)) 764 return rv; 765 766 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_METHOD, idx) != true) 767 return AE_BAD_DATA; 768 769 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 770 771 obj[0].Integer.Value = idx; 772 obj[1].Integer.Value = mid; 773 obj[0].Type = obj[1].Type = ACPI_TYPE_INTEGER; 774 775 obj[2].Buffer.Length = ibuf->Length; 776 obj[2].Buffer.Pointer = ibuf->Pointer; 777 778 obj[2].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? 779 ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; 780 781 arg.Count = 0x03; 782 arg.Pointer = obj; 783 784 obuf->Pointer = NULL; 785 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 786 787 return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); 788 } 789 790 MODULE(MODULE_CLASS_DRIVER, acpiwmi, NULL); 791 792 #ifdef _MODULE 793 #include "ioconf.c" 794 #endif 795 796 static int 797 acpiwmi_modcmd(modcmd_t cmd, void *aux) 798 { 799 int rv = 0; 800 801 switch (cmd) { 802 803 case MODULE_CMD_INIT: 804 805 #ifdef _MODULE 806 rv = config_init_component(cfdriver_ioconf_acpiwmi, 807 cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); 808 #endif 809 break; 810 811 case MODULE_CMD_FINI: 812 813 #ifdef _MODULE 814 rv = config_fini_component(cfdriver_ioconf_acpiwmi, 815 cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); 816 #endif 817 break; 818 819 default: 820 rv = ENOTTY; 821 } 822 823 return rv; 824 } 825