wmi_acpi.c revision 1.12
1/* $NetBSD: wmi_acpi.c,v 1.12 2011/02/16 08:19:56 jruoho 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 1.12 2011/02/16 08:19:56 jruoho 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 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 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 bool 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(ACPI_HANDLE, const char *, bool, bool); 77static bool acpi_wmi_input(struct wmi_t *, uint8_t, uint8_t); 78 79const char * const acpi_wmi_ids[] = { 80 "PNP0C14", 81 "pnp0c14", 82 NULL 83}; 84 85CFATTACH_DECL2_NEW(acpiwmi, sizeof(struct acpi_wmi_softc), 86 acpi_wmi_match, acpi_wmi_attach, acpi_wmi_detach, NULL, 87 acpi_wmi_rescan, acpi_wmi_childdet); 88 89static int 90acpi_wmi_match(device_t parent, cfdata_t match, void *aux) 91{ 92 struct acpi_attach_args *aa = aux; 93 94 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 95 return 0; 96 97 return acpi_match_hid(aa->aa_node->ad_devinfo, acpi_wmi_ids); 98} 99 100static void 101acpi_wmi_attach(device_t parent, device_t self, void *aux) 102{ 103 struct acpi_wmi_softc *sc = device_private(self); 104 struct acpi_attach_args *aa = aux; 105 106 sc->sc_dev = self; 107 sc->sc_node = aa->aa_node; 108 109 sc->sc_child = NULL; 110 sc->sc_ecdev = NULL; 111 sc->sc_handler = NULL; 112 113 aprint_naive("\n"); 114 aprint_normal(": ACPI WMI Interface\n"); 115 116 if (acpi_wmi_init(sc) != true) 117 return; 118 119 acpi_wmi_dump(sc); 120 acpi_wmi_init_ec(sc); 121 acpi_wmi_event_add(sc); 122 acpi_wmi_rescan(self, NULL, NULL); 123 124 (void)pmf_device_register(self, acpi_wmi_suspend, acpi_wmi_resume); 125} 126 127static int 128acpi_wmi_detach(device_t self, int flags) 129{ 130 struct acpi_wmi_softc *sc = device_private(self); 131 132 acpi_wmi_event_del(sc); 133 134 if (sc->sc_ecdev != NULL) { 135 136 (void)AcpiRemoveAddressSpaceHandler(sc->sc_node->ad_handle, 137 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler); 138 } 139 140 if (sc->sc_child != NULL) 141 (void)config_detach(sc->sc_child, flags); 142 143 acpi_wmi_del(sc); 144 pmf_device_deregister(self); 145 146 return 0; 147} 148 149static int 150acpi_wmi_rescan(device_t self, const char *ifattr, const int *locators) 151{ 152 struct acpi_wmi_softc *sc = device_private(self); 153 154 if (ifattr_match(ifattr, "acpiwmibus") && sc->sc_child == NULL) 155 sc->sc_child = config_found_ia(self, "acpiwmibus", 156 NULL, acpi_wmi_print); 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 return acpi_wmi_add(sc, obj); 216 217fail: 218 aprint_error_dev(sc->sc_dev, "failed to evaluate _WDG: %s\n", 219 AcpiFormatException(rv)); 220 221 if (buf.Pointer != NULL) 222 ACPI_FREE(buf.Pointer); 223 224 return false; 225} 226 227static bool 228acpi_wmi_add(struct acpi_wmi_softc *sc, ACPI_OBJECT *obj) 229{ 230 struct wmi_t *wmi; 231 size_t i, n, offset, siz; 232 233 siz = sizeof(struct guid_t); 234 n = obj->Buffer.Length / siz; 235 236 SIMPLEQ_INIT(&sc->wmi_head); 237 238 for (i = offset = 0; i < n; ++i) { 239 240 if ((wmi = kmem_zalloc(sizeof(*wmi), KM_NOSLEEP)) == NULL) 241 goto fail; 242 243 (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 return true; 254 255fail: 256 ACPI_FREE(obj); 257 acpi_wmi_del(sc); 258 259 return false; 260} 261 262static void 263acpi_wmi_del(struct acpi_wmi_softc *sc) 264{ 265 struct wmi_t *wmi; 266 267 if (SIMPLEQ_EMPTY(&sc->wmi_head) != 0) 268 return; 269 270 while (SIMPLEQ_FIRST(&sc->wmi_head) != NULL) { 271 272 wmi = SIMPLEQ_FIRST(&sc->wmi_head); 273 SIMPLEQ_REMOVE_HEAD(&sc->wmi_head, wmi_link); 274 275 KASSERT(wmi != NULL); 276 277 kmem_free(wmi, sizeof(*wmi)); 278 } 279} 280 281static void 282acpi_wmi_dump(struct acpi_wmi_softc *sc) 283{ 284 struct wmi_t *wmi; 285 286 KASSERT(SIMPLEQ_EMPTY(&sc->wmi_head) == 0); 287 288 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 289 290 aprint_debug_dev(sc->sc_dev, "{%08X-%04X-%04X-", 291 wmi->guid.data1, wmi->guid.data2, wmi->guid.data3); 292 293 aprint_debug("%02X%02X-%02X%02X%02X%02X%02X%02X} ", 294 wmi->guid.data4[0], wmi->guid.data4[1], 295 wmi->guid.data4[2], wmi->guid.data4[3], 296 wmi->guid.data4[4], wmi->guid.data4[5], 297 wmi->guid.data4[6], wmi->guid.data4[7]); 298 299 aprint_debug("oid %04X count %02X flags %02X\n", 300 UGET16(wmi->guid.oid), wmi->guid.count, wmi->guid.flags); 301 } 302} 303 304static void 305acpi_wmi_init_ec(struct acpi_wmi_softc *sc) 306{ 307 ACPI_STATUS rv; 308 deviter_t i; 309 device_t d; 310 311 d = deviter_first(&i, DEVITER_F_ROOT_FIRST); 312 313 for (; d != NULL; d = deviter_next(&i)) { 314 315 if (device_is_a(d, "acpiec") != false || 316 device_is_a(d, "acpiecdt") != false) { 317 sc->sc_ecdev = d; 318 break; 319 } 320 } 321 322 deviter_release(&i); 323 324 if (sc->sc_ecdev == NULL) 325 return; 326 327 rv = AcpiInstallAddressSpaceHandler(sc->sc_node->ad_handle, 328 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler, NULL, sc); 329 330 if (ACPI_FAILURE(rv)) 331 sc->sc_ecdev = NULL; 332} 333 334static ACPI_STATUS 335acpi_wmi_guid_get(struct acpi_wmi_softc *sc, 336 const char *src, struct wmi_t **out) 337{ 338 struct wmi_t *wmi; 339 struct guid_t *guid; 340 char bin[16]; 341 char hex[2]; 342 const char *ptr; 343 uint8_t i; 344 345 if (sc == NULL || src == NULL || strlen(src) != 36) 346 return AE_BAD_PARAMETER; 347 348 for (ptr = src, i = 0; i < 16; i++) { 349 350 if (*ptr == '-') 351 ptr++; 352 353 (void)memcpy(hex, ptr, 2); 354 355 if (HEXCHAR(hex[0]) == 0 || HEXCHAR(hex[1]) == 0) 356 return AE_BAD_HEX_CONSTANT; 357 358 bin[i] = strtoul(hex, NULL, 16) & 0xFF; 359 360 ptr++; 361 ptr++; 362 } 363 364 guid = (struct guid_t *)bin; 365 guid->data1 = be32toh(guid->data1); 366 guid->data2 = be16toh(guid->data2); 367 guid->data3 = be16toh(guid->data3); 368 369 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 370 371 if (GUIDCMP(guid, &wmi->guid) != 0) { 372 373 if (out != NULL) 374 *out = wmi; 375 376 return AE_OK; 377 } 378 } 379 380 return AE_NOT_FOUND; 381} 382 383/* 384 * Checks if a GUID is present. Child devices 385 * can use this in their autoconf(9) routines. 386 */ 387int 388acpi_wmi_guid_match(device_t self, const char *guid) 389{ 390 struct acpi_wmi_softc *sc = device_private(self); 391 ACPI_STATUS rv; 392 393 rv = acpi_wmi_guid_get(sc, guid, NULL); 394 395 if (ACPI_SUCCESS(rv)) 396 return 1; 397 398 return 0; 399} 400 401/* 402 * Adds internal event handler. 403 */ 404static void 405acpi_wmi_event_add(struct acpi_wmi_softc *sc) 406{ 407 struct wmi_t *wmi; 408 ACPI_STATUS rv; 409 410 if (acpi_register_notify(sc->sc_node, acpi_wmi_event_handler) != true) 411 return; 412 413 /* 414 * Enable possible expensive events. 415 */ 416 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 417 418 if ((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) != 0 && 419 (wmi->guid.flags & ACPI_WMI_FLAG_EXPENSIVE) != 0) { 420 421 rv = acpi_wmi_enable(sc->sc_node->ad_handle, 422 wmi->guid.oid, false, true); 423 424 if (ACPI_SUCCESS(rv)) { 425 wmi->eevent = true; 426 continue; 427 } 428 429 aprint_debug_dev(sc->sc_dev, "failed to enable " 430 "expensive WExx: %s\n", AcpiFormatException(rv)); 431 } 432 } 433} 434 435/* 436 * Removes the internal event handler. 437 */ 438static void 439acpi_wmi_event_del(struct acpi_wmi_softc *sc) 440{ 441 struct wmi_t *wmi; 442 ACPI_STATUS rv; 443 444 acpi_deregister_notify(sc->sc_node); 445 446 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 447 448 if (wmi->eevent != true) 449 continue; 450 451 KASSERT((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) != 0); 452 KASSERT((wmi->guid.flags & ACPI_WMI_FLAG_EXPENSIVE) != 0); 453 454 rv = acpi_wmi_enable(sc->sc_node->ad_handle, 455 wmi->guid.oid, false, false); 456 457 if (ACPI_SUCCESS(rv)) { 458 wmi->eevent = false; 459 continue; 460 } 461 462 aprint_debug_dev(sc->sc_dev, "failed to disable " 463 "expensive WExx: %s\n", AcpiFormatException(rv)); 464 } 465} 466 467/* 468 * Returns extra information possibly associated with an event. 469 */ 470ACPI_STATUS 471acpi_wmi_event_get(device_t self, uint32_t event, ACPI_BUFFER *obuf) 472{ 473 struct acpi_wmi_softc *sc = device_private(self); 474 struct wmi_t *wmi; 475 ACPI_OBJECT_LIST arg; 476 ACPI_OBJECT obj; 477 ACPI_HANDLE hdl; 478 479 if (sc == NULL || obuf == NULL) 480 return AE_BAD_PARAMETER; 481 482 if (sc->sc_handler == NULL) 483 return AE_ABORT_METHOD; 484 485 hdl = sc->sc_node->ad_handle; 486 487 obj.Type = ACPI_TYPE_INTEGER; 488 obj.Integer.Value = event; 489 490 arg.Count = 0x01; 491 arg.Pointer = &obj; 492 493 obuf->Pointer = NULL; 494 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 495 496 SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { 497 498 if ((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) == 0) 499 continue; 500 501 if (wmi->guid.nid != event) 502 continue; 503 504 return AcpiEvaluateObject(hdl, "_WED", &arg, obuf); 505 } 506 507 return AE_NOT_FOUND; 508} 509 510/* 511 * Forwards events to the external handler through the internal one. 512 */ 513static void 514acpi_wmi_event_handler(ACPI_HANDLE hdl, uint32_t evt, void *aux) 515{ 516 struct acpi_wmi_softc *sc; 517 device_t self = aux; 518 519 sc = device_private(self); 520 521 if (sc->sc_child == NULL) 522 return; 523 524 if (sc->sc_handler == NULL) 525 return; 526 527 (*sc->sc_handler)(NULL, evt, sc->sc_child); 528} 529 530ACPI_STATUS 531acpi_wmi_event_register(device_t self, ACPI_NOTIFY_HANDLER handler) 532{ 533 struct acpi_wmi_softc *sc = device_private(self); 534 535 if (sc == NULL) 536 return AE_BAD_PARAMETER; 537 538 if (handler != NULL && sc->sc_handler != NULL) 539 return AE_ALREADY_EXISTS; 540 541 sc->sc_handler = handler; 542 543 return AE_OK; 544} 545 546ACPI_STATUS 547acpi_wmi_event_deregister(device_t self) 548{ 549 return acpi_wmi_event_register(self, NULL); 550} 551 552/* 553 * Handler for EC regions, which may be embedded in WMI. 554 */ 555static ACPI_STATUS 556acpi_wmi_ec_handler(uint32_t func, ACPI_PHYSICAL_ADDRESS addr, 557 uint32_t width, ACPI_INTEGER *val, void *setup, void *aux) 558{ 559 struct acpi_wmi_softc *sc = aux; 560 561 if (aux == NULL || val == NULL) 562 return AE_BAD_PARAMETER; 563 564 if (addr > 0xFF || width % 8 != 0) 565 return AE_BAD_ADDRESS; 566 567 switch (func) { 568 569 case ACPI_READ: 570 (void)acpiec_bus_read(sc->sc_ecdev, addr, val, width); 571 break; 572 573 case ACPI_WRITE: 574 (void)acpiec_bus_write(sc->sc_ecdev, addr, *val, width); 575 break; 576 577 default: 578 return AE_BAD_PARAMETER; 579 } 580 581 return AE_OK; 582} 583 584/* 585 * As there is no prior knowledge about the expensive 586 * events that cause "significant overhead", try to 587 * disable (enable) these before suspending (resuming). 588 */ 589static bool 590acpi_wmi_suspend(device_t self, const pmf_qual_t *qual) 591{ 592 struct acpi_wmi_softc *sc = device_private(self); 593 594 acpi_wmi_event_del(sc); 595 596 return true; 597} 598 599static bool 600acpi_wmi_resume(device_t self, const pmf_qual_t *qual) 601{ 602 struct acpi_wmi_softc *sc = device_private(self); 603 604 acpi_wmi_event_add(sc); 605 606 return true; 607} 608 609/* 610 * Enables or disables data collection (WCxx) or an event (WExx). 611 */ 612static ACPI_STATUS 613acpi_wmi_enable(ACPI_HANDLE hdl, const char *oid, bool data, bool flag) 614{ 615 char path[5]; 616 const char *str; 617 618 str = (data != false) ? "WC" : "WE"; 619 620 (void)strlcpy(path, str, sizeof(path)); 621 (void)strlcat(path, oid, sizeof(path)); 622 623 return acpi_eval_set_integer(hdl, path, (flag != false) ? 0x01 : 0x00); 624} 625 626static bool 627acpi_wmi_input(struct wmi_t *wmi, uint8_t flag, uint8_t idx) 628{ 629 630 if ((wmi->guid.flags & flag) == 0) 631 return false; 632 633 if (wmi->guid.count == 0x00) 634 return false; 635 636 if (wmi->guid.count < idx) 637 return false; 638 639 return true; 640} 641 642/* 643 * Makes a WMI data block query (WQxx). The corresponding control 644 * method for data collection will be invoked if it is available. 645 */ 646ACPI_STATUS 647acpi_wmi_data_query(device_t self, const char *guid, 648 uint8_t idx, ACPI_BUFFER *obuf) 649{ 650 struct acpi_wmi_softc *sc = device_private(self); 651 struct wmi_t *wmi; 652 char path[5] = "WQ"; 653 ACPI_OBJECT_LIST arg; 654 ACPI_STATUS rv, rvxx; 655 ACPI_OBJECT obj; 656 657 rvxx = AE_SUPPORT; 658 659 if (obuf == NULL) 660 return AE_BAD_PARAMETER; 661 662 rv = acpi_wmi_guid_get(sc, guid, &wmi); 663 664 if (ACPI_FAILURE(rv)) 665 return rv; 666 667 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) 668 return AE_BAD_DATA; 669 670 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 671 672 obj.Type = ACPI_TYPE_INTEGER; 673 obj.Integer.Value = idx; 674 675 arg.Count = 0x01; 676 arg.Pointer = &obj; 677 678 obuf->Pointer = NULL; 679 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 680 681 /* 682 * If the expensive flag is set, we should enable 683 * data collection before evaluating the WQxx buffer. 684 */ 685 if ((wmi->guid.flags & ACPI_WMI_FLAG_EXPENSIVE) != 0) { 686 687 rvxx = acpi_wmi_enable(sc->sc_node->ad_handle, 688 wmi->guid.oid, true, true); 689 } 690 691 rv = AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); 692 693 /* No longer needed. */ 694 if (ACPI_SUCCESS(rvxx)) { 695 696 (void)acpi_wmi_enable(sc->sc_node->ad_handle, 697 wmi->guid.oid, true, false); 698 } 699 700#ifdef DIAGNOSTIC 701 /* 702 * XXX: It appears that quite a few laptops have WQxx 703 * methods that are declared as expensive, but lack the 704 * corresponding WCxx control method. 705 * 706 * -- Acer Aspire One is one example <jruohonen@iki.fi>. 707 */ 708 if (ACPI_FAILURE(rvxx) && rvxx != AE_SUPPORT) 709 aprint_error_dev(sc->sc_dev, "failed to evaluate WCxx " 710 "for %s: %s\n", path, AcpiFormatException(rvxx)); 711#endif 712 return rv; 713} 714 715/* 716 * Writes to a data block (WSxx). 717 */ 718ACPI_STATUS 719acpi_wmi_data_write(device_t self, const char *guid, 720 uint8_t idx, ACPI_BUFFER *ibuf) 721{ 722 struct acpi_wmi_softc *sc = device_private(self); 723 struct wmi_t *wmi; 724 ACPI_OBJECT_LIST arg; 725 ACPI_OBJECT obj[2]; 726 char path[5] = "WS"; 727 ACPI_STATUS rv; 728 729 if (ibuf == NULL) 730 return AE_BAD_PARAMETER; 731 732 rv = acpi_wmi_guid_get(sc, guid, &wmi); 733 734 if (ACPI_FAILURE(rv)) 735 return rv; 736 737 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) 738 return AE_BAD_DATA; 739 740 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 741 742 obj[0].Integer.Value = idx; 743 obj[0].Type = ACPI_TYPE_INTEGER; 744 745 obj[1].Buffer.Length = ibuf->Length; 746 obj[1].Buffer.Pointer = ibuf->Pointer; 747 748 obj[1].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? 749 ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; 750 751 arg.Count = 0x02; 752 arg.Pointer = obj; 753 754 return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, NULL); 755} 756 757/* 758 * Executes a method (WMxx). 759 */ 760ACPI_STATUS 761acpi_wmi_method(device_t self, const char *guid, uint8_t idx, 762 uint32_t mid, ACPI_BUFFER *ibuf, ACPI_BUFFER *obuf) 763{ 764 struct acpi_wmi_softc *sc = device_private(self); 765 struct wmi_t *wmi; 766 ACPI_OBJECT_LIST arg; 767 ACPI_OBJECT obj[3]; 768 char path[5] = "WM"; 769 ACPI_STATUS rv; 770 771 if (ibuf == NULL || obuf == NULL) 772 return AE_BAD_PARAMETER; 773 774 rv = acpi_wmi_guid_get(sc, guid, &wmi); 775 776 if (ACPI_FAILURE(rv)) 777 return rv; 778 779 if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_METHOD, idx) != true) 780 return AE_BAD_DATA; 781 782 (void)strlcat(path, wmi->guid.oid, sizeof(path)); 783 784 obj[0].Integer.Value = idx; 785 obj[1].Integer.Value = mid; 786 obj[0].Type = obj[1].Type = ACPI_TYPE_INTEGER; 787 788 obj[2].Buffer.Length = ibuf->Length; 789 obj[2].Buffer.Pointer = ibuf->Pointer; 790 791 obj[2].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? 792 ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; 793 794 arg.Count = 0x03; 795 arg.Pointer = obj; 796 797 obuf->Pointer = NULL; 798 obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 799 800 return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); 801} 802 803MODULE(MODULE_CLASS_DRIVER, acpiwmi, NULL); 804 805#ifdef _MODULE 806#include "ioconf.c" 807#endif 808 809static int 810acpiwmi_modcmd(modcmd_t cmd, void *aux) 811{ 812 int rv = 0; 813 814 switch (cmd) { 815 816 case MODULE_CMD_INIT: 817 818#ifdef _MODULE 819 rv = config_init_component(cfdriver_ioconf_acpiwmi, 820 cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); 821#endif 822 break; 823 824 case MODULE_CMD_FINI: 825 826#ifdef _MODULE 827 rv = config_fini_component(cfdriver_ioconf_acpiwmi, 828 cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); 829#endif 830 break; 831 832 default: 833 rv = ENOTTY; 834 } 835 836 return rv; 837} 838