| 1 | /* $NetBSD: wmi_acpi.c,v 1.14 2012/08/14 14:38:02 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 1.14 2012/08/14 14:38:02 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 |
| 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 bool 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 | return acpi_wmi_add(sc, obj); |
| 217 | |
| 218 | fail: |
| 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 | |
| 228 | static bool |
| 229 | acpi_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 | if ((wmi = kmem_zalloc(sizeof(*wmi), KM_SLEEP)) == NULL) |
| 242 | goto fail; |
| 243 | |
| 244 | (void)memcpy(&wmi->guid, obj->Buffer.Pointer + offset, siz); |
| 245 | |
| 246 | wmi->eevent = false; |
| 247 | offset = offset + siz; |
| 248 | |
| 249 | SIMPLEQ_INSERT_TAIL(&sc->wmi_head, wmi, wmi_link); |
| 250 | } |
| 251 | |
| 252 | ACPI_FREE(obj); |
| 253 | |
| 254 | return true; |
| 255 | |
| 256 | fail: |
| 257 | ACPI_FREE(obj); |
| 258 | acpi_wmi_del(sc); |
| 259 | |
| 260 | return false; |
| 261 | } |
| 262 | |
| 263 | static void |
| 264 | acpi_wmi_del(struct acpi_wmi_softc *sc) |
| 265 | { |
| 266 | struct wmi_t *wmi; |
| 267 | |
| 268 | while (SIMPLEQ_FIRST(&sc->wmi_head) != NULL) { |
| 269 | wmi = SIMPLEQ_FIRST(&sc->wmi_head); |
| 270 | SIMPLEQ_REMOVE_HEAD(&sc->wmi_head, wmi_link); |
| 271 | kmem_free(wmi, sizeof(*wmi)); |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | static void |
| 276 | acpi_wmi_dump(struct acpi_wmi_softc *sc) |
| 277 | { |
| 278 | struct wmi_t *wmi; |
| 279 | |
| 280 | KASSERT(SIMPLEQ_EMPTY(&sc->wmi_head) == 0); |
| 281 | |
| 282 | SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { |
| 283 | |
| 284 | aprint_debug_dev(sc->sc_dev, "{%08X-%04X-%04X-" , |
| 285 | wmi->guid.data1, wmi->guid.data2, wmi->guid.data3); |
| 286 | |
| 287 | aprint_debug("%02X%02X-%02X%02X%02X%02X%02X%02X} " , |
| 288 | wmi->guid.data4[0], wmi->guid.data4[1], |
| 289 | wmi->guid.data4[2], wmi->guid.data4[3], |
| 290 | wmi->guid.data4[4], wmi->guid.data4[5], |
| 291 | wmi->guid.data4[6], wmi->guid.data4[7]); |
| 292 | |
| 293 | aprint_debug("oid %04X count %02X flags %02X\n" , |
| 294 | UGET16(wmi->guid.oid), wmi->guid.count, wmi->guid.flags); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | static void |
| 299 | acpi_wmi_init_ec(struct acpi_wmi_softc *sc) |
| 300 | { |
| 301 | ACPI_STATUS rv; |
| 302 | deviter_t i; |
| 303 | device_t d; |
| 304 | |
| 305 | d = deviter_first(&i, DEVITER_F_ROOT_FIRST); |
| 306 | |
| 307 | for (; d != NULL; d = deviter_next(&i)) { |
| 308 | |
| 309 | if (device_is_a(d, "acpiec" ) != false || |
| 310 | device_is_a(d, "acpiecdt" ) != false) { |
| 311 | sc->sc_ecdev = d; |
| 312 | break; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | deviter_release(&i); |
| 317 | |
| 318 | if (sc->sc_ecdev == NULL) |
| 319 | return; |
| 320 | |
| 321 | rv = AcpiInstallAddressSpaceHandler(sc->sc_node->ad_handle, |
| 322 | ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler, NULL, sc); |
| 323 | |
| 324 | if (ACPI_FAILURE(rv)) |
| 325 | sc->sc_ecdev = NULL; |
| 326 | } |
| 327 | |
| 328 | static ACPI_STATUS |
| 329 | acpi_wmi_guid_get(struct acpi_wmi_softc *sc, |
| 330 | const char *src, struct wmi_t **out) |
| 331 | { |
| 332 | struct wmi_t *wmi; |
| 333 | struct guid_t *guid; |
| 334 | char bin[16]; |
| 335 | char hex[2]; |
| 336 | const char *ptr; |
| 337 | uint8_t i; |
| 338 | |
| 339 | if (sc == NULL || src == NULL || strlen(src) != 36) |
| 340 | return AE_BAD_PARAMETER; |
| 341 | |
| 342 | for (ptr = src, i = 0; i < 16; i++) { |
| 343 | |
| 344 | if (*ptr == '-') |
| 345 | ptr++; |
| 346 | |
| 347 | (void)memcpy(hex, ptr, 2); |
| 348 | |
| 349 | if (HEXCHAR(hex[0]) == 0 || HEXCHAR(hex[1]) == 0) |
| 350 | return AE_BAD_HEX_CONSTANT; |
| 351 | |
| 352 | bin[i] = strtoul(hex, NULL, 16) & 0xFF; |
| 353 | |
| 354 | ptr++; |
| 355 | ptr++; |
| 356 | } |
| 357 | |
| 358 | guid = (struct guid_t *)bin; |
| 359 | guid->data1 = be32toh(guid->data1); |
| 360 | guid->data2 = be16toh(guid->data2); |
| 361 | guid->data3 = be16toh(guid->data3); |
| 362 | |
| 363 | SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { |
| 364 | |
| 365 | if (GUIDCMP(guid, &wmi->guid) != 0) { |
| 366 | |
| 367 | if (out != NULL) |
| 368 | *out = wmi; |
| 369 | |
| 370 | return AE_OK; |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | return AE_NOT_FOUND; |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Checks if a GUID is present. Child devices |
| 379 | * can use this in their autoconf(9) routines. |
| 380 | */ |
| 381 | int |
| 382 | acpi_wmi_guid_match(device_t self, const char *guid) |
| 383 | { |
| 384 | struct acpi_wmi_softc *sc = device_private(self); |
| 385 | ACPI_STATUS rv; |
| 386 | |
| 387 | rv = acpi_wmi_guid_get(sc, guid, NULL); |
| 388 | |
| 389 | if (ACPI_SUCCESS(rv)) |
| 390 | return 1; |
| 391 | |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | /* |
| 396 | * Adds internal event handler. |
| 397 | */ |
| 398 | static void |
| 399 | acpi_wmi_event_add(struct acpi_wmi_softc *sc) |
| 400 | { |
| 401 | struct wmi_t *wmi; |
| 402 | ACPI_STATUS rv; |
| 403 | |
| 404 | if (acpi_register_notify(sc->sc_node, acpi_wmi_event_handler) != true) |
| 405 | return; |
| 406 | |
| 407 | /* |
| 408 | * Enable possible events, expensive or otherwise. |
| 409 | */ |
| 410 | SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { |
| 411 | |
| 412 | if ((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) != 0) { |
| 413 | |
| 414 | rv = acpi_wmi_enable_event(sc->sc_node->ad_handle, |
| 415 | wmi->guid.nid, true); |
| 416 | |
| 417 | if (ACPI_SUCCESS(rv)) { |
| 418 | wmi->eevent = true; |
| 419 | continue; |
| 420 | } |
| 421 | |
| 422 | aprint_debug_dev(sc->sc_dev, "failed to enable " |
| 423 | "expensive WExx: %s\n" , AcpiFormatException(rv)); |
| 424 | } |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /* |
| 429 | * Removes the internal event handler. |
| 430 | */ |
| 431 | static void |
| 432 | acpi_wmi_event_del(struct acpi_wmi_softc *sc) |
| 433 | { |
| 434 | struct wmi_t *wmi; |
| 435 | ACPI_STATUS rv; |
| 436 | |
| 437 | acpi_deregister_notify(sc->sc_node); |
| 438 | |
| 439 | SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { |
| 440 | |
| 441 | if (wmi->eevent != true) |
| 442 | continue; |
| 443 | |
| 444 | KASSERT((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) != 0); |
| 445 | |
| 446 | rv = acpi_wmi_enable_event(sc->sc_node->ad_handle, |
| 447 | wmi->guid.nid, false); |
| 448 | |
| 449 | if (ACPI_SUCCESS(rv)) { |
| 450 | wmi->eevent = false; |
| 451 | continue; |
| 452 | } |
| 453 | |
| 454 | aprint_debug_dev(sc->sc_dev, "failed to disable " |
| 455 | "expensive WExx: %s\n" , AcpiFormatException(rv)); |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | /* |
| 460 | * Returns extra information possibly associated with an event. |
| 461 | */ |
| 462 | ACPI_STATUS |
| 463 | acpi_wmi_event_get(device_t self, uint32_t event, ACPI_BUFFER *obuf) |
| 464 | { |
| 465 | struct acpi_wmi_softc *sc = device_private(self); |
| 466 | struct wmi_t *wmi; |
| 467 | ACPI_OBJECT_LIST arg; |
| 468 | ACPI_OBJECT obj; |
| 469 | ACPI_HANDLE hdl; |
| 470 | |
| 471 | if (sc == NULL || obuf == NULL) |
| 472 | return AE_BAD_PARAMETER; |
| 473 | |
| 474 | if (sc->sc_handler == NULL) |
| 475 | return AE_ABORT_METHOD; |
| 476 | |
| 477 | hdl = sc->sc_node->ad_handle; |
| 478 | |
| 479 | obj.Type = ACPI_TYPE_INTEGER; |
| 480 | obj.Integer.Value = event; |
| 481 | |
| 482 | arg.Count = 0x01; |
| 483 | arg.Pointer = &obj; |
| 484 | |
| 485 | obuf->Pointer = NULL; |
| 486 | obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; |
| 487 | |
| 488 | SIMPLEQ_FOREACH(wmi, &sc->wmi_head, wmi_link) { |
| 489 | |
| 490 | if ((wmi->guid.flags & ACPI_WMI_FLAG_EVENT) == 0) |
| 491 | continue; |
| 492 | |
| 493 | if (wmi->guid.nid != event) |
| 494 | continue; |
| 495 | |
| 496 | return AcpiEvaluateObject(hdl, "_WED" , &arg, obuf); |
| 497 | } |
| 498 | |
| 499 | return AE_NOT_FOUND; |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * Forwards events to the external handler through the internal one. |
| 504 | */ |
| 505 | static void |
| 506 | acpi_wmi_event_handler(ACPI_HANDLE hdl, uint32_t evt, void *aux) |
| 507 | { |
| 508 | struct acpi_wmi_softc *sc; |
| 509 | device_t self = aux; |
| 510 | |
| 511 | sc = device_private(self); |
| 512 | |
| 513 | if (sc->sc_child == NULL) |
| 514 | return; |
| 515 | |
| 516 | if (sc->sc_handler == NULL) |
| 517 | return; |
| 518 | |
| 519 | (*sc->sc_handler)(NULL, evt, sc->sc_child); |
| 520 | } |
| 521 | |
| 522 | ACPI_STATUS |
| 523 | acpi_wmi_event_register(device_t self, ACPI_NOTIFY_HANDLER handler) |
| 524 | { |
| 525 | struct acpi_wmi_softc *sc = device_private(self); |
| 526 | |
| 527 | if (sc == NULL) |
| 528 | return AE_BAD_PARAMETER; |
| 529 | |
| 530 | if (handler != NULL && sc->sc_handler != NULL) |
| 531 | return AE_ALREADY_EXISTS; |
| 532 | |
| 533 | sc->sc_handler = handler; |
| 534 | |
| 535 | return AE_OK; |
| 536 | } |
| 537 | |
| 538 | ACPI_STATUS |
| 539 | acpi_wmi_event_deregister(device_t self) |
| 540 | { |
| 541 | return acpi_wmi_event_register(self, NULL); |
| 542 | } |
| 543 | |
| 544 | /* |
| 545 | * Handler for EC regions, which may be embedded in WMI. |
| 546 | */ |
| 547 | static ACPI_STATUS |
| 548 | acpi_wmi_ec_handler(uint32_t func, ACPI_PHYSICAL_ADDRESS addr, |
| 549 | uint32_t width, ACPI_INTEGER *val, void *setup, void *aux) |
| 550 | { |
| 551 | struct acpi_wmi_softc *sc = aux; |
| 552 | |
| 553 | if (aux == NULL || val == NULL) |
| 554 | return AE_BAD_PARAMETER; |
| 555 | |
| 556 | if (addr > 0xFF || width % 8 != 0) |
| 557 | return AE_BAD_ADDRESS; |
| 558 | |
| 559 | switch (func) { |
| 560 | |
| 561 | case ACPI_READ: |
| 562 | (void)acpiec_bus_read(sc->sc_ecdev, addr, val, width); |
| 563 | break; |
| 564 | |
| 565 | case ACPI_WRITE: |
| 566 | (void)acpiec_bus_write(sc->sc_ecdev, addr, *val, width); |
| 567 | break; |
| 568 | |
| 569 | default: |
| 570 | return AE_BAD_PARAMETER; |
| 571 | } |
| 572 | |
| 573 | return AE_OK; |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * As there is no prior knowledge about the expensive |
| 578 | * events that cause "significant overhead", try to |
| 579 | * disable (enable) these before suspending (resuming). |
| 580 | */ |
| 581 | static bool |
| 582 | acpi_wmi_suspend(device_t self, const pmf_qual_t *qual) |
| 583 | { |
| 584 | struct acpi_wmi_softc *sc = device_private(self); |
| 585 | |
| 586 | acpi_wmi_event_del(sc); |
| 587 | |
| 588 | return true; |
| 589 | } |
| 590 | |
| 591 | static bool |
| 592 | acpi_wmi_resume(device_t self, const pmf_qual_t *qual) |
| 593 | { |
| 594 | struct acpi_wmi_softc *sc = device_private(self); |
| 595 | |
| 596 | acpi_wmi_event_add(sc); |
| 597 | |
| 598 | return true; |
| 599 | } |
| 600 | |
| 601 | static ACPI_STATUS |
| 602 | acpi_wmi_enable_event(ACPI_HANDLE hdl, uint8_t nid, bool flag) |
| 603 | { |
| 604 | char path[5]; |
| 605 | |
| 606 | snprintf(path, sizeof(path), "WE%02X" , nid); |
| 607 | |
| 608 | return acpi_eval_set_integer(hdl, path, (flag != false) ? 0x01 : 0x00); |
| 609 | } |
| 610 | |
| 611 | static ACPI_STATUS |
| 612 | acpi_wmi_enable_collection(ACPI_HANDLE hdl, const char *oid, bool flag) |
| 613 | { |
| 614 | char path[5]; |
| 615 | |
| 616 | strlcpy(path, "WC" , sizeof(path)); |
| 617 | strlcat(path, oid, sizeof(path)); |
| 618 | |
| 619 | return acpi_eval_set_integer(hdl, path, (flag != false) ? 0x01 : 0x00); |
| 620 | } |
| 621 | |
| 622 | static bool |
| 623 | acpi_wmi_input(struct wmi_t *wmi, uint8_t flag, uint8_t idx) |
| 624 | { |
| 625 | |
| 626 | if ((wmi->guid.flags & flag) == 0) |
| 627 | return false; |
| 628 | |
| 629 | if (wmi->guid.count == 0x00) |
| 630 | return false; |
| 631 | |
| 632 | if (wmi->guid.count < idx) |
| 633 | return false; |
| 634 | |
| 635 | return true; |
| 636 | } |
| 637 | |
| 638 | /* |
| 639 | * Makes a WMI data block query (WQxx). The corresponding control |
| 640 | * method for data collection will be invoked if it is available. |
| 641 | */ |
| 642 | ACPI_STATUS |
| 643 | acpi_wmi_data_query(device_t self, const char *guid, |
| 644 | uint8_t idx, ACPI_BUFFER *obuf) |
| 645 | { |
| 646 | struct acpi_wmi_softc *sc = device_private(self); |
| 647 | struct wmi_t *wmi; |
| 648 | char path[5] = "WQ" ; |
| 649 | ACPI_OBJECT_LIST arg; |
| 650 | ACPI_STATUS rv, rvxx; |
| 651 | ACPI_OBJECT obj; |
| 652 | |
| 653 | rvxx = AE_SUPPORT; |
| 654 | |
| 655 | if (obuf == NULL) |
| 656 | return AE_BAD_PARAMETER; |
| 657 | |
| 658 | rv = acpi_wmi_guid_get(sc, guid, &wmi); |
| 659 | |
| 660 | if (ACPI_FAILURE(rv)) |
| 661 | return rv; |
| 662 | |
| 663 | if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) |
| 664 | return AE_BAD_DATA; |
| 665 | |
| 666 | (void)strlcat(path, wmi->guid.oid, sizeof(path)); |
| 667 | |
| 668 | obj.Type = ACPI_TYPE_INTEGER; |
| 669 | obj.Integer.Value = idx; |
| 670 | |
| 671 | arg.Count = 0x01; |
| 672 | arg.Pointer = &obj; |
| 673 | |
| 674 | obuf->Pointer = NULL; |
| 675 | obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; |
| 676 | |
| 677 | /* |
| 678 | * If the expensive flag is set, we should enable |
| 679 | * data collection before evaluating the WQxx buffer. |
| 680 | */ |
| 681 | if ((wmi->guid.flags & ACPI_WMI_FLAG_EXPENSIVE) != 0) { |
| 682 | |
| 683 | rvxx = acpi_wmi_enable_collection(sc->sc_node->ad_handle, |
| 684 | wmi->guid.oid, true); |
| 685 | } |
| 686 | |
| 687 | rv = AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); |
| 688 | |
| 689 | /* No longer needed. */ |
| 690 | if (ACPI_SUCCESS(rvxx)) { |
| 691 | |
| 692 | (void)acpi_wmi_enable_collection(sc->sc_node->ad_handle, |
| 693 | wmi->guid.oid, false); |
| 694 | } |
| 695 | |
| 696 | #ifdef DIAGNOSTIC |
| 697 | /* |
| 698 | * XXX: It appears that quite a few laptops have WQxx |
| 699 | * methods that are declared as expensive, but lack the |
| 700 | * corresponding WCxx control method. |
| 701 | * |
| 702 | * -- Acer Aspire One is one example <jruohonen@iki.fi>. |
| 703 | */ |
| 704 | if (ACPI_FAILURE(rvxx) && rvxx != AE_SUPPORT) |
| 705 | aprint_error_dev(sc->sc_dev, "failed to evaluate WCxx " |
| 706 | "for %s: %s\n" , path, AcpiFormatException(rvxx)); |
| 707 | #endif |
| 708 | return rv; |
| 709 | } |
| 710 | |
| 711 | /* |
| 712 | * Writes to a data block (WSxx). |
| 713 | */ |
| 714 | ACPI_STATUS |
| 715 | acpi_wmi_data_write(device_t self, const char *guid, |
| 716 | uint8_t idx, ACPI_BUFFER *ibuf) |
| 717 | { |
| 718 | struct acpi_wmi_softc *sc = device_private(self); |
| 719 | struct wmi_t *wmi; |
| 720 | ACPI_OBJECT_LIST arg; |
| 721 | ACPI_OBJECT obj[2]; |
| 722 | char path[5] = "WS" ; |
| 723 | ACPI_STATUS rv; |
| 724 | |
| 725 | if (ibuf == NULL) |
| 726 | return AE_BAD_PARAMETER; |
| 727 | |
| 728 | rv = acpi_wmi_guid_get(sc, guid, &wmi); |
| 729 | |
| 730 | if (ACPI_FAILURE(rv)) |
| 731 | return rv; |
| 732 | |
| 733 | if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_DATA, idx) != true) |
| 734 | return AE_BAD_DATA; |
| 735 | |
| 736 | (void)strlcat(path, wmi->guid.oid, sizeof(path)); |
| 737 | |
| 738 | obj[0].Integer.Value = idx; |
| 739 | obj[0].Type = ACPI_TYPE_INTEGER; |
| 740 | |
| 741 | obj[1].Buffer.Length = ibuf->Length; |
| 742 | obj[1].Buffer.Pointer = ibuf->Pointer; |
| 743 | |
| 744 | obj[1].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? |
| 745 | ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; |
| 746 | |
| 747 | arg.Count = 0x02; |
| 748 | arg.Pointer = obj; |
| 749 | |
| 750 | return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, NULL); |
| 751 | } |
| 752 | |
| 753 | /* |
| 754 | * Executes a method (WMxx). |
| 755 | */ |
| 756 | ACPI_STATUS |
| 757 | acpi_wmi_method(device_t self, const char *guid, uint8_t idx, |
| 758 | uint32_t mid, ACPI_BUFFER *ibuf, ACPI_BUFFER *obuf) |
| 759 | { |
| 760 | struct acpi_wmi_softc *sc = device_private(self); |
| 761 | struct wmi_t *wmi; |
| 762 | ACPI_OBJECT_LIST arg; |
| 763 | ACPI_OBJECT obj[3]; |
| 764 | char path[5] = "WM" ; |
| 765 | ACPI_STATUS rv; |
| 766 | |
| 767 | if (ibuf == NULL || obuf == NULL) |
| 768 | return AE_BAD_PARAMETER; |
| 769 | |
| 770 | rv = acpi_wmi_guid_get(sc, guid, &wmi); |
| 771 | |
| 772 | if (ACPI_FAILURE(rv)) |
| 773 | return rv; |
| 774 | |
| 775 | if (acpi_wmi_input(wmi, ACPI_WMI_FLAG_METHOD, idx) != true) |
| 776 | return AE_BAD_DATA; |
| 777 | |
| 778 | (void)strlcat(path, wmi->guid.oid, sizeof(path)); |
| 779 | |
| 780 | obj[0].Integer.Value = idx; |
| 781 | obj[1].Integer.Value = mid; |
| 782 | obj[0].Type = obj[1].Type = ACPI_TYPE_INTEGER; |
| 783 | |
| 784 | obj[2].Buffer.Length = ibuf->Length; |
| 785 | obj[2].Buffer.Pointer = ibuf->Pointer; |
| 786 | |
| 787 | obj[2].Type = ((wmi->guid.flags & ACPI_WMI_FLAG_STRING) != 0) ? |
| 788 | ACPI_TYPE_STRING : ACPI_TYPE_BUFFER; |
| 789 | |
| 790 | arg.Count = 0x03; |
| 791 | arg.Pointer = obj; |
| 792 | |
| 793 | obuf->Pointer = NULL; |
| 794 | obuf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; |
| 795 | |
| 796 | return AcpiEvaluateObject(sc->sc_node->ad_handle, path, &arg, obuf); |
| 797 | } |
| 798 | |
| 799 | MODULE(MODULE_CLASS_DRIVER, acpiwmi, NULL); |
| 800 | |
| 801 | #ifdef _MODULE |
| 802 | #include "ioconf.c" |
| 803 | #endif |
| 804 | |
| 805 | static int |
| 806 | acpiwmi_modcmd(modcmd_t cmd, void *aux) |
| 807 | { |
| 808 | int rv = 0; |
| 809 | |
| 810 | switch (cmd) { |
| 811 | |
| 812 | case MODULE_CMD_INIT: |
| 813 | |
| 814 | #ifdef _MODULE |
| 815 | rv = config_init_component(cfdriver_ioconf_acpiwmi, |
| 816 | cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); |
| 817 | #endif |
| 818 | break; |
| 819 | |
| 820 | case MODULE_CMD_FINI: |
| 821 | |
| 822 | #ifdef _MODULE |
| 823 | rv = config_fini_component(cfdriver_ioconf_acpiwmi, |
| 824 | cfattach_ioconf_acpiwmi, cfdata_ioconf_acpiwmi); |
| 825 | #endif |
| 826 | break; |
| 827 | |
| 828 | default: |
| 829 | rv = ENOTTY; |
| 830 | } |
| 831 | |
| 832 | return rv; |
| 833 | } |
| 834 | |