1/* $NetBSD: wmi_acpi.c,v 1.23 2023/08/11 08:36:59 riastradh 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 1.23 2023/08/11 08:36:59 riastradh 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 45ACPI_MODULE_NAME ("wmi_acpi") 46 47/* 48 * This implements something called "Microsoft Windows Management 49 * Instrumentation" (WMI). This subset of ACPI is described 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 56static int acpi_wmi_match(device_t, cfdata_t, void *); 57static void acpi_wmi_attach(device_t, device_t, void *); 58static int acpi_wmi_detach(device_t, int); 59static int acpi_wmi_rescan(device_t, const char *, const int *); 60static void acpi_wmi_childdet(device_t, device_t); 61static int acpi_wmi_print(void *, const char *); 62static bool acpi_wmi_init(struct acpi_wmi_softc *); 63static void acpi_wmi_init_ec(struct acpi_wmi_softc *); 64static void acpi_wmi_add(struct acpi_wmi_softc *, ACPI_OBJECT *); 65static void acpi_wmi_del(struct acpi_wmi_softc *); 66static void acpi_wmi_dump(struct acpi_wmi_softc *); 67static ACPI_STATUS acpi_wmi_guid_get(struct acpi_wmi_softc *, 68 const char *, struct wmi_t **); 69static void acpi_wmi_event_add(struct acpi_wmi_softc *); 70static void acpi_wmi_event_del(struct acpi_wmi_softc *); 71static void acpi_wmi_event_handler(ACPI_HANDLE, uint32_t, void *); 72static ACPI_STATUS acpi_wmi_ec_handler(uint32_t, ACPI_PHYSICAL_ADDRESS, 73 uint32_t, ACPI_INTEGER *, void *, void *); 74static bool acpi_wmi_suspend(device_t, const pmf_qual_t *); 75static bool acpi_wmi_resume(device_t, const pmf_qual_t *); 76static ACPI_STATUS acpi_wmi_enable_event(ACPI_HANDLE, uint8_t, bool); 77static ACPI_STATUS acpi_wmi_enable_collection(ACPI_HANDLE, const char *, bool); 78static bool acpi_wmi_input(struct wmi_t *, uint8_t, uint8_t); 79 80static const struct device_compatible_entry compat_data[] = { 81 { .compat = "PNP0C14" }, 82 { .compat = "pnp0c14" }, 83 DEVICE_COMPAT_EOL 84}; 85 86CFATTACH_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 90static int 91acpi_wmi_match(device_t parent, cfdata_t match, void *aux) 92{ 93 struct acpi_attach_args *aa = aux; 94 95 return acpi_compatible_match(aa, compat_data); 96} 97 98static void 99acpi_wmi_attach(device_t parent, device_t self, void *aux) 100{ 101 struct acpi_wmi_softc *sc = device_private(self); 102 struct acpi_attach_args *aa = aux; 103 104 sc->sc_dev = self; 105 sc->sc_node = aa->aa_node; 106 107 sc->sc_child = NULL; 108 sc->sc_ecdev = NULL; 109 sc->sc_handler = NULL; 110 111 aprint_naive("\n"); 112 aprint_normal(": ACPI WMI Interface\n"); 113 114 if (acpi_wmi_init(sc) != true) 115 return; 116 117 acpi_wmi_dump(sc); 118 acpi_wmi_init_ec(sc); 119 acpi_wmi_event_add(sc); 120 acpi_wmi_rescan(self, NULL, NULL); 121 122 (void)pmf_device_register(self, acpi_wmi_suspend, acpi_wmi_resume); 123} 124 125static int 126acpi_wmi_detach(device_t self, int flags) 127{ 128 struct acpi_wmi_softc *sc = device_private(self); 129 int error; 130 131 error = config_detach_children(self, flags); 132 if (error) 133 return error; 134 135 acpi_wmi_event_del(sc); 136 137 if (sc->sc_ecdev != NULL) { 138 (void)AcpiRemoveAddressSpaceHandler(sc->sc_node->ad_handle, 139 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler); 140 } 141 142 acpi_wmi_del(sc); 143 pmf_device_deregister(self); 144 145 return 0; 146} 147 148static int 149acpi_wmi_rescan(device_t self, const char *ifattr, const int *locators) 150{ 151 struct acpi_wmi_softc *sc = device_private(self); 152 153 if (sc->sc_child == NULL) { 154 sc->sc_child = 155 config_found(self, NULL, acpi_wmi_print, CFARGS_NONE); 156 } 157 158 return 0; 159} 160 161static void 162acpi_wmi_childdet(device_t self, device_t child) 163{ 164 struct acpi_wmi_softc *sc = device_private(self); 165 166 if (sc->sc_child == child) 167 sc->sc_child = NULL; 168} 169 170static int 171acpi_wmi_print(void *aux, const char *pnp) 172{ 173 174 if (pnp != NULL) 175 aprint_normal("acpiwmibus at %s", pnp); 176 177 return UNCONF; 178} 179 180static bool 181acpi_wmi_init(struct acpi_wmi_softc *sc) 182{ 183 ACPI_OBJECT *obj; 184 ACPI_BUFFER buf; 185 ACPI_STATUS rv; 186 uint32_t len; 187 188 rv = acpi_eval_struct(sc->sc_node->ad_handle, "_WDG", &buf); 189 190 if (ACPI_FAILURE(rv)) 191 goto fail; 192 193 obj = buf.Pointer; 194 195 if (obj->Type != ACPI_TYPE_BUFFER) { 196 rv = AE_TYPE; 197 goto fail; 198 } 199 200 len = obj->Buffer.Length; 201 202 if (len != obj->Package.Count) { 203 rv = AE_BAD_VALUE; 204 goto fail; 205 } 206 207 CTASSERT(sizeof(struct guid_t) == 20); 208 209 if (len < sizeof(struct guid_t) || 210 len % sizeof(struct guid_t) != 0) { 211 rv = AE_BAD_DATA; 212 goto fail; 213 } 214 215 acpi_wmi_add(sc, obj); 216 return true; 217 218fail: 219 aprint_error_dev(sc->sc_dev, "failed to evaluate _WDG: %s\n", 220 AcpiFormatException(rv)); 221 222 if (buf.Pointer != NULL) 223 ACPI_FREE(buf.Pointer); 224 225 return false; 226} 227 228static void 229acpi_wmi_add(struct acpi_wmi_softc *sc, ACPI_OBJECT *obj) 230{ 231 struct wmi_t *wmi; 232 size_t i, n, offset, siz; 233 234 siz = sizeof(struct guid_t); 235 n = obj->Buffer.Length / siz; 236 237 SIMPLEQ_INIT(&sc->wmi_head); 238 239 for (i = offset = 0; i < n; ++i) { 240 241 wmi = kmem_zalloc(sizeof(*wmi), KM_SLEEP); 242 (void)memcpy(&wmi->guid, obj->Buffer.Pointer + offset, siz); 243 244 wmi->eevent = false; 245 offset = offset + siz; 246 247 SIMPLEQ_INSERT_TAIL(&sc->wmi_head, wmi, wmi_link); 248 } 249 250 ACPI_FREE(obj); 251} 252 253static void 254acpi_wmi_del(struct acpi_wmi_softc *sc) 255{ 256 struct wmi_t *wmi; 257 258 while (SIMPLEQ_FIRST(&sc->wmi_head) != NULL) { 259 wmi = SIMPLEQ_FIRST(&sc->wmi_head); 260 SIMPLEQ_REMOVE_HEAD(&sc->wmi_head, wmi_link); 261 kmem_free(wmi, sizeof(*wmi)); 262 } 263} 264 265static void 266acpi_wmi_dump(struct acpi_wmi_softc *sc) 267{ 268 struct wmi_t *wmi; 269 270 KASSERT(SIMPLEQ_EMPTY(&sc->wmi_head) == 0); 271 272 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 273 274 aprint_debug_dev(sc->sc_dev, "{%08X-%04X-%04X-", 275 wmi->guid.data1, wmi->guid.data2, wmi->guid.data3); 276 277 aprint_debug("%02X%02X-%02X%02X%02X%02X%02X%02X} ", 278 wmi->guid.data4[0], wmi->guid.data4[1], 279 wmi->guid.data4[2], wmi->guid.data4[3], 280 wmi->guid.data4[4], wmi->guid.data4[5], 281 wmi->guid.data4[6], wmi->guid.data4[7]); 282 283 aprint_debug("oid %04X count %02X flags %02X\n", 284 UGET16(wmi->guid.oid), wmi->guid.count, wmi->guid.flags); 285 } 286} 287 288static void 289acpi_wmi_init_ec(struct acpi_wmi_softc *sc) 290{ 291 ACPI_STATUS rv; 292 deviter_t i; 293 device_t d; 294 295 d = deviter_first(&i, DEVITER_F_ROOT_FIRST); 296 297 for (; d != NULL; d = deviter_next(&i)) { 298 299 if (device_is_a(d, "acpiec") != false || 300 device_is_a(d, "acpiecdt") != false) { 301 sc->sc_ecdev = d; 302 break; 303 } 304 } 305 306 deviter_release(&i); 307 308 if (sc->sc_ecdev == NULL) 309 return; 310 311 rv = AcpiInstallAddressSpaceHandler(sc->sc_node->ad_handle, 312 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler, NULL, sc); 313 314 if (ACPI_FAILURE(rv)) 315 sc->sc_ecdev = NULL; 316} 317 318static ACPI_STATUS 319acpi_wmi_guid_get(struct acpi_wmi_softc *sc, 320 const char *src, struct wmi_t **out) 321{ 322 struct wmi_t *wmi; 323 struct guid_t guid; 324 char bin[16]; 325 char hex[3]; 326 const char *ptr; 327 uint8_t i; 328 329 if (sc == NULL || src == NULL || strlen(src) != 36) 330 return AE_BAD_PARAMETER; 331 332 for (ptr = src, i = 0; i < 16; i++) { 333 334 if (*ptr == '-') 335 ptr++; 336 337 (void)memcpy(hex, ptr, 2); 338 hex[2] = '\0'; 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.data1 = be32dec(&bin[0]); 350 guid.data2 = be16dec(&bin[4]); 351 guid.data3 = be16dec(&bin[6]); 352 memcpy(guid.data4, &bin[8], 8); 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 */ 372int 373acpi_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 */ 389static void 390acpi_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 */ 422static void 423acpi_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 */ 453ACPI_STATUS 454acpi_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 */ 496static void 497acpi_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 513ACPI_STATUS 514acpi_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 529ACPI_STATUS 530acpi_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 */ 538static ACPI_STATUS 539acpi_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 */ 572static bool 573acpi_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 582static bool 583acpi_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 592static ACPI_STATUS 593acpi_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 602static ACPI_STATUS 603acpi_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 613static bool 614acpi_wmi_input(struct wmi_t *wmi, uint8_t flag, uint8_t idx) 615{ 616 /* A data block may have no flags at all */ 617 if ((wmi->guid.flags & flag) == 0 && 618 (flag == ACPI_WMI_FLAG_DATA && 619 (wmi->guid.flags & ~ACPI_WMI_FLAG_EXPENSIVE) != 0)) 620 return false; 621 622 if (wmi->guid.count == 0x00) 623 return false; 624 625 if (wmi->guid.count < idx) 626 return false; 627 628 return true; 629} 630 631/* 632 * Makes a WMI data block query (WQxx). The corresponding control 633 * method for data collection will be invoked if it is available. 634 */ 635ACPI_STATUS 636acpi_wmi_data_query(device_t self, const char *guid, 637 uint8_t idx, ACPI_BUFFER *obuf) 638{ 639 struct acpi_wmi_softc *sc = device_private(self); 640 struct wmi_t *wmi; 641 char path[5] = "WQ"; 642 ACPI_OBJECT_LIST arg; 643 ACPI_STATUS rv, rvxx; 644 ACPI_OBJECT obj; 645 646 rvxx = AE_SUPPORT; 647 648 if (obuf == NULL) 649 return AE_BAD_PARAMETER; 650 651 rv = acpi_wmi_guid_get(sc, guid, &wmi); 652 653 if (ACPI_FAILURE(rv)) 654 return rv; 655 656 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) 657 return AE_BAD_DATA; 658 659 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 660 661 obj.Type = ACPI_TYPE_INTEGER; 662 obj.Integer.Value = idx; 663 664 arg.Count = 0x01; 665 arg.Pointer = &obj; 666 667 obuf->Pointer = NULL; 668 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 669 670 /* 671 * If the expensive flag is set, we should enable 672 * data collection before evaluating the WQxx buffer. 673 */ 674 if ((wmi->guid.flags & ACPI_WMI_FLAG_EXPENSIVE) != 0) { 675 676 rvxx = acpi_wmi_enable_collection(sc->sc_node->ad_handle, 677 wmi->guid.oid, true); 678 } 679 680 rv = AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); 681 682 /* No longer needed. */ 683 if (ACPI_SUCCESS(rvxx)) { 684 685 (void)acpi_wmi_enable_collection(sc->sc_node->ad_handle, 686 wmi->guid.oid, false); 687 } 688 689#ifdef DIAGNOSTIC 690 /* 691 * XXX: It appears that quite a few laptops have WQxx 692 * methods that are declared as expensive, but lack the 693 * corresponding WCxx control method. 694 * 695 * -- Acer Aspire One is one example <jruohonen@iki.fi>. 696 */ 697 if (ACPI_FAILURE(rvxx) && rvxx != AE_SUPPORT) 698 aprint_error_dev(sc->sc_dev, "failed to evaluate WCxx " 699 "for %s: %s\n", path, AcpiFormatException(rvxx)); 700#endif 701 return rv; 702} 703 704/* 705 * Writes to a data block (WSxx). 706 */ 707ACPI_STATUS 708acpi_wmi_data_write(device_t self, const char *guid, 709 uint8_t idx, ACPI_BUFFER *ibuf) 710{ 711 struct acpi_wmi_softc *sc = device_private(self); 712 struct wmi_t *wmi; 713 ACPI_OBJECT_LIST arg; 714 ACPI_OBJECT obj[2]; 715 char path[5] = "WS"; 716 ACPI_STATUS rv; 717 718 if (ibuf == NULL) 719 return AE_BAD_PARAMETER; 720 721 rv = acpi_wmi_guid_get(sc, guid, &wmi); 722 723 if (ACPI_FAILURE(rv)) 724 return rv; 725 726 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) 727 return AE_BAD_DATA; 728 729 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 730 731 obj[0].Integer.Value = idx; 732 obj[0].Type = ACPI_TYPE_INTEGER; 733 734 obj[1].Buffer.Length = ibuf->Length; 735 obj[1].Buffer.Pointer = ibuf->Pointer; 736 737 obj[1].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? 738 ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; 739 740 arg.Count = 0x02; 741 arg.Pointer = obj; 742 743 return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, NULL); 744} 745 746/* 747 * Executes a method (WMxx). 748 */ 749ACPI_STATUS 750acpi_wmi_method(device_t self, const char *guid, uint8_t idx, 751 uint32_t mid, ACPI_BUFFER *ibuf, ACPI_BUFFER *obuf) 752{ 753 struct acpi_wmi_softc *sc = device_private(self); 754 struct wmi_t *wmi; 755 ACPI_OBJECT_LIST arg; 756 ACPI_OBJECT obj[3]; 757 char path[5] = "WM"; 758 ACPI_STATUS rv; 759 760 if (ibuf == NULL || obuf == NULL) 761 return AE_BAD_PARAMETER; 762 763 rv = acpi_wmi_guid_get(sc, guid, &wmi); 764 765 if (ACPI_FAILURE(rv)) 766 return rv; 767 768 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_METHOD, idx) != true) 769 return AE_BAD_DATA; 770 771 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 772 773 obj[0].Integer.Value = idx; 774 obj[1].Integer.Value = mid; 775 obj[0].Type = obj[1].Type = ACPI_TYPE_INTEGER; 776 777 obj[2].Buffer.Length = ibuf->Length; 778 obj[2].Buffer.Pointer = ibuf->Pointer; 779 780 obj[2].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? 781 ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; 782 783 arg.Count = 0x03; 784 arg.Pointer = obj; 785 786 obuf->Pointer = NULL; 787 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 788 789 return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); 790} 791 792MODULE(MODULE_CLASS_DRIVER, acpiwmi, NULL); 793 794#ifdef _MODULE 795#include "ioconf.c" 796#endif 797 798static int 799acpiwmi_modcmd(modcmd_t cmd, void *aux) 800{ 801 int rv = 0; 802 803 switch (cmd) { 804 805 case MODULE_CMD_INIT: 806 807#ifdef _MODULE 808 rv = config_init_component(cfdriver_ioconf_acpiwmi, 809 cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); 810#endif 811 break; 812 813 case MODULE_CMD_FINI: 814 815#ifdef _MODULE 816 rv = config_fini_component(cfdriver_ioconf_acpiwmi, 817 cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); 818#endif 819 break; 820 821 default: 822 rv = ENOTTY; 823 } 824 825 return rv; 826} 827