1 /* $NetBSD: wmi_acpi.c,v 1.16 2017/12/03 17:34:50 bouyer 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 1.16 2017/12/03 17:34:50 bouyer 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[3]; 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 hex[2] = '\0'; 340 341 if (HEXCHAR(hex[0]) == 0 || HEXCHAR(hex[1]) == 0) 342 return AE_BAD_HEX_CONSTANT; 343 344 bin[i] = strtoul(hex, NULL, 16) & 0xFF; 345 346 ptr++; 347 ptr++; 348 } 349 350 guid = (struct guid_t *)bin; 351 guid->data1 = be32toh(guid->data1); 352 guid->data2 = be16toh(guid->data2); 353 guid->data3 = be16toh(guid->data3); 354 355 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 356 357 if (GUIDCMP(guid, &wmi->guid) != 0) { 358 359 if (out != NULL) 360 *out = wmi; 361 362 return AE_OK; 363 } 364 } 365 366 return AE_NOT_FOUND; 367 } 368 369 /* 370 * Checks if a GUID is present. Child devices 371 * can use this in their autoconf(9) routines. 372 */ 373 int 374 acpi_wmi_guid_match(device_t self, const char *guid) 375 { 376 struct acpi_wmi_softc *sc = device_private(self); 377 ACPI_STATUS rv; 378 379 rv = acpi_wmi_guid_get(sc, guid, NULL); 380 381 if (ACPI_SUCCESS(rv)) 382 return 1; 383 384 return 0; 385 } 386 387 /* 388 * Adds internal event handler. 389 */ 390 static void 391 acpi_wmi_event_add(struct acpi_wmi_softc *sc) 392 { 393 struct wmi_t *wmi; 394 ACPI_STATUS rv; 395 396 if (acpi_register_notify(sc->sc_node, acpi_wmi_event_handler) != true) 397 return; 398 399 /* 400 * Enable possible events, expensive or otherwise. 401 */ 402 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 403 404 if ((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) != 0) { 405 406 rv = acpi_wmi_enable_event(sc->sc_node->ad_handle, 407 wmi->guid.nid, true); 408 409 if (ACPI_SUCCESS(rv)) { 410 wmi->eevent = true; 411 continue; 412 } 413 414 aprint_debug_dev(sc->sc_dev, "failed to enable " 415 "expensive WExx: %s\n", AcpiFormatException(rv)); 416 } 417 } 418 } 419 420 /* 421 * Removes the internal event handler. 422 */ 423 static void 424 acpi_wmi_event_del(struct acpi_wmi_softc *sc) 425 { 426 struct wmi_t *wmi; 427 ACPI_STATUS rv; 428 429 acpi_deregister_notify(sc->sc_node); 430 431 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 432 433 if (wmi->eevent != true) 434 continue; 435 436 KASSERT((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) != 0); 437 438 rv = acpi_wmi_enable_event(sc->sc_node->ad_handle, 439 wmi->guid.nid, false); 440 441 if (ACPI_SUCCESS(rv)) { 442 wmi->eevent = false; 443 continue; 444 } 445 446 aprint_debug_dev(sc->sc_dev, "failed to disable " 447 "expensive WExx: %s\n", AcpiFormatException(rv)); 448 } 449 } 450 451 /* 452 * Returns extra information possibly associated with an event. 453 */ 454 ACPI_STATUS 455 acpi_wmi_event_get(device_t self, uint32_t event, ACPI_BUFFER *obuf) 456 { 457 struct acpi_wmi_softc *sc = device_private(self); 458 struct wmi_t *wmi; 459 ACPI_OBJECT_LIST arg; 460 ACPI_OBJECT obj; 461 ACPI_HANDLE hdl; 462 463 if (sc == NULL || obuf == NULL) 464 return AE_BAD_PARAMETER; 465 466 if (sc->sc_handler == NULL) 467 return AE_ABORT_METHOD; 468 469 hdl = sc->sc_node->ad_handle; 470 471 obj.Type = ACPI_TYPE_INTEGER; 472 obj.Integer.Value = event; 473 474 arg.Count = 0x01; 475 arg.Pointer = &obj; 476 477 obuf->Pointer = NULL; 478 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 479 480 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 481 482 if ((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) == 0) 483 continue; 484 485 if (wmi->guid.nid != event) 486 continue; 487 488 return AcpiEvaluateObject(hdl, "_WED", &arg, obuf); 489 } 490 491 return AE_NOT_FOUND; 492 } 493 494 /* 495 * Forwards events to the external handler through the internal one. 496 */ 497 static void 498 acpi_wmi_event_handler(ACPI_HANDLE hdl, uint32_t evt, void *aux) 499 { 500 struct acpi_wmi_softc *sc; 501 device_t self = aux; 502 503 sc = device_private(self); 504 505 if (sc->sc_child == NULL) 506 return; 507 508 if (sc->sc_handler == NULL) 509 return; 510 511 (*sc->sc_handler)(NULL, evt, sc->sc_child); 512 } 513 514 ACPI_STATUS 515 acpi_wmi_event_register(device_t self, ACPI_NOTIFY_HANDLER handler) 516 { 517 struct acpi_wmi_softc *sc = device_private(self); 518 519 if (sc == NULL) 520 return AE_BAD_PARAMETER; 521 522 if (handler != NULL && sc->sc_handler != NULL) 523 return AE_ALREADY_EXISTS; 524 525 sc->sc_handler = handler; 526 527 return AE_OK; 528 } 529 530 ACPI_STATUS 531 acpi_wmi_event_deregister(device_t self) 532 { 533 return acpi_wmi_event_register(self, NULL); 534 } 535 536 /* 537 * Handler for EC regions, which may be embedded in WMI. 538 */ 539 static ACPI_STATUS 540 acpi_wmi_ec_handler(uint32_t func, ACPI_PHYSICAL_ADDRESS addr, 541 uint32_t width, ACPI_INTEGER *val, void *setup, void *aux) 542 { 543 struct acpi_wmi_softc *sc = aux; 544 545 if (aux == NULL || val == NULL) 546 return AE_BAD_PARAMETER; 547 548 if (addr > 0xFF || width % 8 != 0) 549 return AE_BAD_ADDRESS; 550 551 switch (func) { 552 553 case ACPI_READ: 554 (void)acpiec_bus_read(sc->sc_ecdev, addr, val, width); 555 break; 556 557 case ACPI_WRITE: 558 (void)acpiec_bus_write(sc->sc_ecdev, addr, *val, width); 559 break; 560 561 default: 562 return AE_BAD_PARAMETER; 563 } 564 565 return AE_OK; 566 } 567 568 /* 569 * As there is no prior knowledge about the expensive 570 * events that cause "significant overhead", try to 571 * disable (enable) these before suspending (resuming). 572 */ 573 static bool 574 acpi_wmi_suspend(device_t self, const pmf_qual_t *qual) 575 { 576 struct acpi_wmi_softc *sc = device_private(self); 577 578 acpi_wmi_event_del(sc); 579 580 return true; 581 } 582 583 static bool 584 acpi_wmi_resume(device_t self, const pmf_qual_t *qual) 585 { 586 struct acpi_wmi_softc *sc = device_private(self); 587 588 acpi_wmi_event_add(sc); 589 590 return true; 591 } 592 593 static ACPI_STATUS 594 acpi_wmi_enable_event(ACPI_HANDLE hdl, uint8_t nid, bool flag) 595 { 596 char path[5]; 597 598 snprintf(path, sizeof(path), "WE%02X", nid); 599 600 return acpi_eval_set_integer(hdl, path, (flag != false) ? 0x01 : 0x00); 601 } 602 603 static ACPI_STATUS 604 acpi_wmi_enable_collection(ACPI_HANDLE hdl, const char *oid, bool flag) 605 { 606 char path[5]; 607 608 strlcpy(path, "WC", sizeof(path)); 609 strlcat(path, oid, sizeof(path)); 610 611 return acpi_eval_set_integer(hdl, path, (flag != false) ? 0x01 : 0x00); 612 } 613 614 static bool 615 acpi_wmi_input(struct wmi_t *wmi, uint8_t flag, uint8_t idx) 616 { 617 /* A data block may have no flags at all */ 618 if ((wmi->guid.flags & flag) == 0 && 619 (flag == ACPI_WMI_FLAG_DATA && 620 (wmi->guid.flags & ~ACPI_WMI_FLAG_EXPENSIVE) != 0)) 621 return false; 622 623 if (wmi->guid.count == 0x00) 624 return false; 625 626 if (wmi->guid.count < idx) 627 return false; 628 629 return true; 630 } 631 632 /* 633 * Makes a WMI data block query (WQxx). The corresponding control 634 * method for data collection will be invoked if it is available. 635 */ 636 ACPI_STATUS 637 acpi_wmi_data_query(device_t self, const char *guid, 638 uint8_t idx, ACPI_BUFFER *obuf) 639 { 640 struct acpi_wmi_softc *sc = device_private(self); 641 struct wmi_t *wmi; 642 char path[5] = "WQ"; 643 ACPI_OBJECT_LIST arg; 644 ACPI_STATUS rv, rvxx; 645 ACPI_OBJECT obj; 646 647 rvxx = AE_SUPPORT; 648 649 if (obuf == NULL) 650 return AE_BAD_PARAMETER; 651 652 rv = acpi_wmi_guid_get(sc, guid, &wmi); 653 654 if (ACPI_FAILURE(rv)) 655 return rv; 656 657 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) 658 return AE_BAD_DATA; 659 660 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 661 662 obj.Type = ACPI_TYPE_INTEGER; 663 obj.Integer.Value = idx; 664 665 arg.Count = 0x01; 666 arg.Pointer = &obj; 667 668 obuf->Pointer = NULL; 669 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 670 671 /* 672 * If the expensive flag is set, we should enable 673 * data collection before evaluating the WQxx buffer. 674 */ 675 if ((wmi->guid.flags & ACPI_WMI_FLAG_EXPENSIVE) != 0) { 676 677 rvxx = acpi_wmi_enable_collection(sc->sc_node->ad_handle, 678 wmi->guid.oid, true); 679 } 680 681 rv = AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); 682 683 /* No longer needed. */ 684 if (ACPI_SUCCESS(rvxx)) { 685 686 (void)acpi_wmi_enable_collection(sc->sc_node->ad_handle, 687 wmi->guid.oid, false); 688 } 689 690 #ifdef DIAGNOSTIC 691 /* 692 * XXX: It appears that quite a few laptops have WQxx 693 * methods that are declared as expensive, but lack the 694 * corresponding WCxx control method. 695 * 696 * -- Acer Aspire One is one example <jruohonen@iki.fi>. 697 */ 698 if (ACPI_FAILURE(rvxx) && rvxx != AE_SUPPORT) 699 aprint_error_dev(sc->sc_dev, "failed to evaluate WCxx " 700 "for %s: %s\n", path, AcpiFormatException(rvxx)); 701 #endif 702 return rv; 703 } 704 705 /* 706 * Writes to a data block (WSxx). 707 */ 708 ACPI_STATUS 709 acpi_wmi_data_write(device_t self, const char *guid, 710 uint8_t idx, ACPI_BUFFER *ibuf) 711 { 712 struct acpi_wmi_softc *sc = device_private(self); 713 struct wmi_t *wmi; 714 ACPI_OBJECT_LIST arg; 715 ACPI_OBJECT obj[2]; 716 char path[5] = "WS"; 717 ACPI_STATUS rv; 718 719 if (ibuf == NULL) 720 return AE_BAD_PARAMETER; 721 722 rv = acpi_wmi_guid_get(sc, guid, &wmi); 723 724 if (ACPI_FAILURE(rv)) 725 return rv; 726 727 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) 728 return AE_BAD_DATA; 729 730 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 731 732 obj[0].Integer.Value = idx; 733 obj[0].Type = ACPI_TYPE_INTEGER; 734 735 obj[1].Buffer.Length = ibuf->Length; 736 obj[1].Buffer.Pointer = ibuf->Pointer; 737 738 obj[1].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? 739 ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; 740 741 arg.Count = 0x02; 742 arg.Pointer = obj; 743 744 return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, NULL); 745 } 746 747 /* 748 * Executes a method (WMxx). 749 */ 750 ACPI_STATUS 751 acpi_wmi_method(device_t self, const char *guid, uint8_t idx, 752 uint32_t mid, ACPI_BUFFER *ibuf, ACPI_BUFFER *obuf) 753 { 754 struct acpi_wmi_softc *sc = device_private(self); 755 struct wmi_t *wmi; 756 ACPI_OBJECT_LIST arg; 757 ACPI_OBJECT obj[3]; 758 char path[5] = "WM"; 759 ACPI_STATUS rv; 760 761 if (ibuf == NULL || obuf == NULL) 762 return AE_BAD_PARAMETER; 763 764 rv = acpi_wmi_guid_get(sc, guid, &wmi); 765 766 if (ACPI_FAILURE(rv)) 767 return rv; 768 769 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_METHOD, idx) != true) 770 return AE_BAD_DATA; 771 772 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 773 774 obj[0].Integer.Value = idx; 775 obj[1].Integer.Value = mid; 776 obj[0].Type = obj[1].Type = ACPI_TYPE_INTEGER; 777 778 obj[2].Buffer.Length = ibuf->Length; 779 obj[2].Buffer.Pointer = ibuf->Pointer; 780 781 obj[2].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? 782 ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; 783 784 arg.Count = 0x03; 785 arg.Pointer = obj; 786 787 obuf->Pointer = NULL; 788 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 789 790 return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); 791 } 792 793 MODULE(MODULE_CLASS_DRIVER, acpiwmi, NULL); 794 795 #ifdef _MODULE 796 #include "ioconf.c" 797 #endif 798 799 static int 800 acpiwmi_modcmd(modcmd_t cmd, void *aux) 801 { 802 int rv = 0; 803 804 switch (cmd) { 805 806 case MODULE_CMD_INIT: 807 808 #ifdef _MODULE 809 rv = config_init_component(cfdriver_ioconf_acpiwmi, 810 cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); 811 #endif 812 break; 813 814 case MODULE_CMD_FINI: 815 816 #ifdef _MODULE 817 rv = config_fini_component(cfdriver_ioconf_acpiwmi, 818 cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); 819 #endif 820 break; 821 822 default: 823 rv = ENOTTY; 824 } 825 826 return rv; 827 } 828