| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #define EXPORT_ACPI_INTERFACES |
| 45 | |
| 46 | #include "acpi.h" |
| 47 | #include "accommon.h" |
| 48 | #include "acevents.h" |
| 49 | #include "acnamesp.h" |
| 50 | |
| 51 | #define _COMPONENT ACPI_EVENTS |
| 52 | ACPI_MODULE_NAME ("evxfgpe" ) |
| 53 | |
| 54 | |
| 55 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
| 56 | /******************************************************************************* |
| 57 | * |
| 58 | * FUNCTION: AcpiUpdateAllGpes |
| 59 | * |
| 60 | * PARAMETERS: None |
| 61 | * |
| 62 | * RETURN: Status |
| 63 | * |
| 64 | * DESCRIPTION: Complete GPE initialization and enable all GPEs that have |
| 65 | * associated _Lxx or _Exx methods and are not pointed to by any |
| 66 | * device _PRW methods (this indicates that these GPEs are |
| 67 | * generally intended for system or device wakeup. Such GPEs |
| 68 | * have to be enabled directly when the devices whose _PRW |
| 69 | * methods point to them are set up for wakeup signaling.) |
| 70 | * |
| 71 | * NOTE: Should be called after any GPEs are added to the system. Primarily, |
| 72 | * after the system _PRW methods have been run, but also after a GPE Block |
| 73 | * Device has been added or if any new GPE methods have been added via a |
| 74 | * dynamic table load. |
| 75 | * |
| 76 | ******************************************************************************/ |
| 77 | |
| 78 | ACPI_STATUS |
| 79 | AcpiUpdateAllGpes ( |
| 80 | void) |
| 81 | { |
| 82 | ACPI_STATUS Status; |
| 83 | |
| 84 | |
| 85 | ACPI_FUNCTION_TRACE (AcpiUpdateAllGpes); |
| 86 | |
| 87 | |
| 88 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 89 | if (ACPI_FAILURE (Status)) |
| 90 | { |
| 91 | return_ACPI_STATUS (Status); |
| 92 | } |
| 93 | |
| 94 | if (AcpiGbl_AllGpesInitialized) |
| 95 | { |
| 96 | goto UnlockAndExit; |
| 97 | } |
| 98 | |
| 99 | Status = AcpiEvWalkGpeList (AcpiEvInitializeGpeBlock, NULL); |
| 100 | if (ACPI_SUCCESS (Status)) |
| 101 | { |
| 102 | AcpiGbl_AllGpesInitialized = TRUE; |
| 103 | } |
| 104 | |
| 105 | UnlockAndExit: |
| 106 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 107 | return_ACPI_STATUS (Status); |
| 108 | } |
| 109 | |
| 110 | ACPI_EXPORT_SYMBOL (AcpiUpdateAllGpes) |
| 111 | |
| 112 | |
| 113 | /******************************************************************************* |
| 114 | * |
| 115 | * FUNCTION: AcpiEnableGpe |
| 116 | * |
| 117 | * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 118 | * GpeNumber - GPE level within the GPE block |
| 119 | * |
| 120 | * RETURN: Status |
| 121 | * |
| 122 | * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is |
| 123 | * hardware-enabled. |
| 124 | * |
| 125 | ******************************************************************************/ |
| 126 | |
| 127 | ACPI_STATUS |
| 128 | AcpiEnableGpe ( |
| 129 | ACPI_HANDLE GpeDevice, |
| 130 | UINT32 GpeNumber) |
| 131 | { |
| 132 | ACPI_STATUS Status = AE_BAD_PARAMETER; |
| 133 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 134 | ACPI_CPU_FLAGS Flags; |
| 135 | |
| 136 | |
| 137 | ACPI_FUNCTION_TRACE (AcpiEnableGpe); |
| 138 | |
| 139 | |
| 140 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 141 | |
| 142 | /* |
| 143 | * Ensure that we have a valid GPE number and that there is some way |
| 144 | * of handling the GPE (handler or a GPE method). In other words, we |
| 145 | * won't allow a valid GPE to be enabled if there is no way to handle it. |
| 146 | */ |
| 147 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 148 | if (GpeEventInfo) |
| 149 | { |
| 150 | if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) != |
| 151 | ACPI_GPE_DISPATCH_NONE) |
| 152 | { |
| 153 | Status = AcpiEvAddGpeReference (GpeEventInfo); |
| 154 | } |
| 155 | else |
| 156 | { |
| 157 | Status = AE_NO_HANDLER; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 162 | return_ACPI_STATUS (Status); |
| 163 | } |
| 164 | |
| 165 | ACPI_EXPORT_SYMBOL (AcpiEnableGpe) |
| 166 | |
| 167 | |
| 168 | /******************************************************************************* |
| 169 | * |
| 170 | * FUNCTION: AcpiDisableGpe |
| 171 | * |
| 172 | * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 173 | * GpeNumber - GPE level within the GPE block |
| 174 | * |
| 175 | * RETURN: Status |
| 176 | * |
| 177 | * DESCRIPTION: Remove a reference to a GPE. When the last reference is |
| 178 | * removed, only then is the GPE disabled (for runtime GPEs), or |
| 179 | * the GPE mask bit disabled (for wake GPEs) |
| 180 | * |
| 181 | ******************************************************************************/ |
| 182 | |
| 183 | ACPI_STATUS |
| 184 | AcpiDisableGpe ( |
| 185 | ACPI_HANDLE GpeDevice, |
| 186 | UINT32 GpeNumber) |
| 187 | { |
| 188 | ACPI_STATUS Status = AE_BAD_PARAMETER; |
| 189 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 190 | ACPI_CPU_FLAGS Flags; |
| 191 | |
| 192 | |
| 193 | ACPI_FUNCTION_TRACE (AcpiDisableGpe); |
| 194 | |
| 195 | |
| 196 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 197 | |
| 198 | /* Ensure that we have a valid GPE number */ |
| 199 | |
| 200 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 201 | if (GpeEventInfo) |
| 202 | { |
| 203 | Status = AcpiEvRemoveGpeReference (GpeEventInfo); |
| 204 | } |
| 205 | |
| 206 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 207 | return_ACPI_STATUS (Status); |
| 208 | } |
| 209 | |
| 210 | ACPI_EXPORT_SYMBOL (AcpiDisableGpe) |
| 211 | |
| 212 | |
| 213 | /******************************************************************************* |
| 214 | * |
| 215 | * FUNCTION: AcpiSetGpe |
| 216 | * |
| 217 | * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 218 | * GpeNumber - GPE level within the GPE block |
| 219 | * Action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE |
| 220 | * |
| 221 | * RETURN: Status |
| 222 | * |
| 223 | * DESCRIPTION: Enable or disable an individual GPE. This function bypasses |
| 224 | * the reference count mechanism used in the AcpiEnableGpe(), |
| 225 | * AcpiDisableGpe() interfaces. |
| 226 | * This API is typically used by the GPE raw handler mode driver |
| 227 | * to switch between the polling mode and the interrupt mode after |
| 228 | * the driver has enabled the GPE. |
| 229 | * The APIs should be invoked in this order: |
| 230 | * AcpiEnableGpe() <- Ensure the reference count > 0 |
| 231 | * AcpiSetGpe(ACPI_GPE_DISABLE) <- Enter polling mode |
| 232 | * AcpiSetGpe(ACPI_GPE_ENABLE) <- Leave polling mode |
| 233 | * AcpiDisableGpe() <- Decrease the reference count |
| 234 | * |
| 235 | * Note: If a GPE is shared by 2 silicon components, then both the drivers |
| 236 | * should support GPE polling mode or disabling the GPE for long period |
| 237 | * for one driver may break the other. So use it with care since all |
| 238 | * firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode. |
| 239 | * |
| 240 | ******************************************************************************/ |
| 241 | |
| 242 | ACPI_STATUS |
| 243 | AcpiSetGpe ( |
| 244 | ACPI_HANDLE GpeDevice, |
| 245 | UINT32 GpeNumber, |
| 246 | UINT8 Action) |
| 247 | { |
| 248 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 249 | ACPI_STATUS Status; |
| 250 | ACPI_CPU_FLAGS Flags; |
| 251 | |
| 252 | |
| 253 | ACPI_FUNCTION_TRACE (AcpiSetGpe); |
| 254 | |
| 255 | |
| 256 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 257 | |
| 258 | /* Ensure that we have a valid GPE number */ |
| 259 | |
| 260 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 261 | if (!GpeEventInfo) |
| 262 | { |
| 263 | Status = AE_BAD_PARAMETER; |
| 264 | goto UnlockAndExit; |
| 265 | } |
| 266 | |
| 267 | /* Perform the action */ |
| 268 | |
| 269 | switch (Action) |
| 270 | { |
| 271 | case ACPI_GPE_ENABLE: |
| 272 | |
| 273 | Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE); |
| 274 | GpeEventInfo->DisableForDispatch = FALSE; |
| 275 | break; |
| 276 | |
| 277 | case ACPI_GPE_DISABLE: |
| 278 | |
| 279 | Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE); |
| 280 | GpeEventInfo->DisableForDispatch = TRUE; |
| 281 | break; |
| 282 | |
| 283 | default: |
| 284 | |
| 285 | Status = AE_BAD_PARAMETER; |
| 286 | break; |
| 287 | } |
| 288 | |
| 289 | UnlockAndExit: |
| 290 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 291 | return_ACPI_STATUS (Status); |
| 292 | } |
| 293 | |
| 294 | ACPI_EXPORT_SYMBOL (AcpiSetGpe) |
| 295 | |
| 296 | |
| 297 | /******************************************************************************* |
| 298 | * |
| 299 | * FUNCTION: AcpiMaskGpe |
| 300 | * |
| 301 | * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 302 | * GpeNumber - GPE level within the GPE block |
| 303 | * IsMasked - Whether the GPE is masked or not |
| 304 | * |
| 305 | * RETURN: Status |
| 306 | * |
| 307 | * DESCRIPTION: Unconditionally mask/unmask the an individual GPE, ex., to |
| 308 | * prevent a GPE flooding. |
| 309 | * |
| 310 | ******************************************************************************/ |
| 311 | |
| 312 | ACPI_STATUS |
| 313 | AcpiMaskGpe ( |
| 314 | ACPI_HANDLE GpeDevice, |
| 315 | UINT32 GpeNumber, |
| 316 | BOOLEAN IsMasked) |
| 317 | { |
| 318 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 319 | ACPI_STATUS Status; |
| 320 | ACPI_CPU_FLAGS Flags; |
| 321 | |
| 322 | |
| 323 | ACPI_FUNCTION_TRACE (AcpiMaskGpe); |
| 324 | |
| 325 | |
| 326 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 327 | |
| 328 | /* Ensure that we have a valid GPE number */ |
| 329 | |
| 330 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 331 | if (!GpeEventInfo) |
| 332 | { |
| 333 | Status = AE_BAD_PARAMETER; |
| 334 | goto UnlockAndExit; |
| 335 | } |
| 336 | |
| 337 | Status = AcpiEvMaskGpe (GpeEventInfo, IsMasked); |
| 338 | |
| 339 | UnlockAndExit: |
| 340 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 341 | return_ACPI_STATUS (Status); |
| 342 | } |
| 343 | |
| 344 | ACPI_EXPORT_SYMBOL (AcpiMaskGpe) |
| 345 | |
| 346 | |
| 347 | /******************************************************************************* |
| 348 | * |
| 349 | * FUNCTION: AcpiMarkGpeForWake |
| 350 | * |
| 351 | * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 352 | * GpeNumber - GPE level within the GPE block |
| 353 | * |
| 354 | * RETURN: Status |
| 355 | * |
| 356 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply |
| 357 | * sets the ACPI_GPE_CAN_WAKE flag. |
| 358 | * |
| 359 | * Some potential callers of AcpiSetupGpeForWake may know in advance that |
| 360 | * there won't be any notify handlers installed for device wake notifications |
| 361 | * from the given GPE (one example is a button GPE in Linux). For these cases, |
| 362 | * AcpiMarkGpeForWake should be used instead of AcpiSetupGpeForWake. |
| 363 | * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to |
| 364 | * setup implicit wake notification for it (since there's no handler method). |
| 365 | * |
| 366 | ******************************************************************************/ |
| 367 | |
| 368 | ACPI_STATUS |
| 369 | AcpiMarkGpeForWake ( |
| 370 | ACPI_HANDLE GpeDevice, |
| 371 | UINT32 GpeNumber) |
| 372 | { |
| 373 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 374 | ACPI_STATUS Status = AE_BAD_PARAMETER; |
| 375 | ACPI_CPU_FLAGS Flags; |
| 376 | |
| 377 | |
| 378 | ACPI_FUNCTION_TRACE (AcpiMarkGpeForWake); |
| 379 | |
| 380 | |
| 381 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 382 | |
| 383 | /* Ensure that we have a valid GPE number */ |
| 384 | |
| 385 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 386 | if (GpeEventInfo) |
| 387 | { |
| 388 | /* Mark the GPE as a possible wake event */ |
| 389 | |
| 390 | GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE; |
| 391 | Status = AE_OK; |
| 392 | } |
| 393 | |
| 394 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 395 | return_ACPI_STATUS (Status); |
| 396 | } |
| 397 | |
| 398 | ACPI_EXPORT_SYMBOL (AcpiMarkGpeForWake) |
| 399 | |
| 400 | |
| 401 | /******************************************************************************* |
| 402 | * |
| 403 | * FUNCTION: AcpiSetupGpeForWake |
| 404 | * |
| 405 | * PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW) |
| 406 | * GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 407 | * GpeNumber - GPE level within the GPE block |
| 408 | * |
| 409 | * RETURN: Status |
| 410 | * |
| 411 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. This |
| 412 | * interface is intended to be used as the host executes the |
| 413 | * _PRW methods (Power Resources for Wake) in the system tables. |
| 414 | * Each _PRW appears under a Device Object (The WakeDevice), and |
| 415 | * contains the info for the wake GPE associated with the |
| 416 | * WakeDevice. |
| 417 | * |
| 418 | ******************************************************************************/ |
| 419 | |
| 420 | ACPI_STATUS |
| 421 | AcpiSetupGpeForWake ( |
| 422 | ACPI_HANDLE WakeDevice, |
| 423 | ACPI_HANDLE GpeDevice, |
| 424 | UINT32 GpeNumber) |
| 425 | { |
| 426 | ACPI_STATUS Status; |
| 427 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 428 | ACPI_NAMESPACE_NODE *DeviceNode; |
| 429 | ACPI_GPE_NOTIFY_INFO *Notify; |
| 430 | ACPI_GPE_NOTIFY_INFO *NewNotify; |
| 431 | ACPI_CPU_FLAGS Flags; |
| 432 | |
| 433 | |
| 434 | ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake); |
| 435 | |
| 436 | |
| 437 | /* Parameter Validation */ |
| 438 | |
| 439 | if (!WakeDevice) |
| 440 | { |
| 441 | /* |
| 442 | * By forcing WakeDevice to be valid, we automatically enable the |
| 443 | * implicit notify feature on all hosts. |
| 444 | */ |
| 445 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 446 | } |
| 447 | |
| 448 | /* Handle root object case */ |
| 449 | |
| 450 | if (WakeDevice == ACPI_ROOT_OBJECT) |
| 451 | { |
| 452 | DeviceNode = AcpiGbl_RootNode; |
| 453 | } |
| 454 | else |
| 455 | { |
| 456 | DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice); |
| 457 | } |
| 458 | |
| 459 | /* Validate WakeDevice is of type Device */ |
| 460 | |
| 461 | if (DeviceNode->Type != ACPI_TYPE_DEVICE) |
| 462 | { |
| 463 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 464 | } |
| 465 | |
| 466 | /* |
| 467 | * Allocate a new notify object up front, in case it is needed. |
| 468 | * Memory allocation while holding a spinlock is a big no-no |
| 469 | * on some hosts. |
| 470 | */ |
| 471 | NewNotify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO)); |
| 472 | if (!NewNotify) |
| 473 | { |
| 474 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 475 | } |
| 476 | |
| 477 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 478 | |
| 479 | /* Ensure that we have a valid GPE number */ |
| 480 | |
| 481 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 482 | if (!GpeEventInfo) |
| 483 | { |
| 484 | Status = AE_BAD_PARAMETER; |
| 485 | goto UnlockAndExit; |
| 486 | } |
| 487 | |
| 488 | /* |
| 489 | * If there is no method or handler for this GPE, then the |
| 490 | * WakeDevice will be notified whenever this GPE fires. This is |
| 491 | * known as an "implicit notify". Note: The GPE is assumed to be |
| 492 | * level-triggered (for windows compatibility). |
| 493 | */ |
| 494 | if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == |
| 495 | ACPI_GPE_DISPATCH_NONE) |
| 496 | { |
| 497 | /* |
| 498 | * This is the first device for implicit notify on this GPE. |
| 499 | * Just set the flags here, and enter the NOTIFY block below. |
| 500 | */ |
| 501 | GpeEventInfo->Flags = |
| 502 | (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); |
| 503 | } |
| 504 | |
| 505 | /* |
| 506 | * If we already have an implicit notify on this GPE, add |
| 507 | * this device to the notify list. |
| 508 | */ |
| 509 | if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == |
| 510 | ACPI_GPE_DISPATCH_NOTIFY) |
| 511 | { |
| 512 | /* Ensure that the device is not already in the list */ |
| 513 | |
| 514 | Notify = GpeEventInfo->Dispatch.NotifyList; |
| 515 | while (Notify) |
| 516 | { |
| 517 | if (Notify->DeviceNode == DeviceNode) |
| 518 | { |
| 519 | Status = AE_ALREADY_EXISTS; |
| 520 | goto UnlockAndExit; |
| 521 | } |
| 522 | Notify = Notify->Next; |
| 523 | } |
| 524 | |
| 525 | /* Add this device to the notify list for this GPE */ |
| 526 | |
| 527 | NewNotify->DeviceNode = DeviceNode; |
| 528 | NewNotify->Next = GpeEventInfo->Dispatch.NotifyList; |
| 529 | GpeEventInfo->Dispatch.NotifyList = NewNotify; |
| 530 | NewNotify = NULL; |
| 531 | } |
| 532 | |
| 533 | /* Mark the GPE as a possible wake event */ |
| 534 | |
| 535 | GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE; |
| 536 | Status = AE_OK; |
| 537 | |
| 538 | |
| 539 | UnlockAndExit: |
| 540 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 541 | |
| 542 | /* Delete the notify object if it was not used above */ |
| 543 | |
| 544 | if (NewNotify) |
| 545 | { |
| 546 | ACPI_FREE (NewNotify); |
| 547 | } |
| 548 | return_ACPI_STATUS (Status); |
| 549 | } |
| 550 | |
| 551 | ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake) |
| 552 | |
| 553 | |
| 554 | /******************************************************************************* |
| 555 | * |
| 556 | * FUNCTION: AcpiSetGpeWakeMask |
| 557 | * |
| 558 | * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 559 | * GpeNumber - GPE level within the GPE block |
| 560 | * Action - Enable or Disable |
| 561 | * |
| 562 | * RETURN: Status |
| 563 | * |
| 564 | * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must |
| 565 | * already be marked as a WAKE GPE. |
| 566 | * |
| 567 | ******************************************************************************/ |
| 568 | |
| 569 | ACPI_STATUS |
| 570 | AcpiSetGpeWakeMask ( |
| 571 | ACPI_HANDLE GpeDevice, |
| 572 | UINT32 GpeNumber, |
| 573 | UINT8 Action) |
| 574 | { |
| 575 | ACPI_STATUS Status = AE_OK; |
| 576 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 577 | ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; |
| 578 | ACPI_CPU_FLAGS Flags; |
| 579 | UINT32 RegisterBit; |
| 580 | |
| 581 | |
| 582 | ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask); |
| 583 | |
| 584 | |
| 585 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 586 | |
| 587 | /* |
| 588 | * Ensure that we have a valid GPE number and that this GPE is in |
| 589 | * fact a wake GPE |
| 590 | */ |
| 591 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 592 | if (!GpeEventInfo) |
| 593 | { |
| 594 | Status = AE_BAD_PARAMETER; |
| 595 | goto UnlockAndExit; |
| 596 | } |
| 597 | |
| 598 | if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE)) |
| 599 | { |
| 600 | Status = AE_TYPE; |
| 601 | goto UnlockAndExit; |
| 602 | } |
| 603 | |
| 604 | GpeRegisterInfo = GpeEventInfo->RegisterInfo; |
| 605 | if (!GpeRegisterInfo) |
| 606 | { |
| 607 | Status = AE_NOT_EXIST; |
| 608 | goto UnlockAndExit; |
| 609 | } |
| 610 | |
| 611 | RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo); |
| 612 | |
| 613 | /* Perform the action */ |
| 614 | |
| 615 | switch (Action) |
| 616 | { |
| 617 | case ACPI_GPE_ENABLE: |
| 618 | |
| 619 | ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit); |
| 620 | break; |
| 621 | |
| 622 | case ACPI_GPE_DISABLE: |
| 623 | |
| 624 | ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit); |
| 625 | break; |
| 626 | |
| 627 | default: |
| 628 | |
| 629 | ACPI_ERROR ((AE_INFO, "%u, Invalid action" , Action)); |
| 630 | Status = AE_BAD_PARAMETER; |
| 631 | break; |
| 632 | } |
| 633 | |
| 634 | UnlockAndExit: |
| 635 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 636 | return_ACPI_STATUS (Status); |
| 637 | } |
| 638 | |
| 639 | ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask) |
| 640 | |
| 641 | |
| 642 | /******************************************************************************* |
| 643 | * |
| 644 | * FUNCTION: AcpiClearGpe |
| 645 | * |
| 646 | * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 647 | * GpeNumber - GPE level within the GPE block |
| 648 | * |
| 649 | * RETURN: Status |
| 650 | * |
| 651 | * DESCRIPTION: Clear an ACPI event (general purpose) |
| 652 | * |
| 653 | ******************************************************************************/ |
| 654 | |
| 655 | ACPI_STATUS |
| 656 | AcpiClearGpe ( |
| 657 | ACPI_HANDLE GpeDevice, |
| 658 | UINT32 GpeNumber) |
| 659 | { |
| 660 | ACPI_STATUS Status = AE_OK; |
| 661 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 662 | ACPI_CPU_FLAGS Flags; |
| 663 | |
| 664 | |
| 665 | ACPI_FUNCTION_TRACE (AcpiClearGpe); |
| 666 | |
| 667 | |
| 668 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 669 | |
| 670 | /* Ensure that we have a valid GPE number */ |
| 671 | |
| 672 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 673 | if (!GpeEventInfo) |
| 674 | { |
| 675 | Status = AE_BAD_PARAMETER; |
| 676 | goto UnlockAndExit; |
| 677 | } |
| 678 | |
| 679 | Status = AcpiHwClearGpe (GpeEventInfo); |
| 680 | |
| 681 | UnlockAndExit: |
| 682 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 683 | return_ACPI_STATUS (Status); |
| 684 | } |
| 685 | |
| 686 | ACPI_EXPORT_SYMBOL (AcpiClearGpe) |
| 687 | |
| 688 | |
| 689 | /******************************************************************************* |
| 690 | * |
| 691 | * FUNCTION: AcpiGetGpeStatus |
| 692 | * |
| 693 | * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 |
| 694 | * GpeNumber - GPE level within the GPE block |
| 695 | * EventStatus - Where the current status of the event |
| 696 | * will be returned |
| 697 | * |
| 698 | * RETURN: Status |
| 699 | * |
| 700 | * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) |
| 701 | * |
| 702 | ******************************************************************************/ |
| 703 | |
| 704 | ACPI_STATUS |
| 705 | AcpiGetGpeStatus ( |
| 706 | ACPI_HANDLE GpeDevice, |
| 707 | UINT32 GpeNumber, |
| 708 | ACPI_EVENT_STATUS *EventStatus) |
| 709 | { |
| 710 | ACPI_STATUS Status = AE_OK; |
| 711 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 712 | ACPI_CPU_FLAGS Flags; |
| 713 | |
| 714 | |
| 715 | ACPI_FUNCTION_TRACE (AcpiGetGpeStatus); |
| 716 | |
| 717 | |
| 718 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 719 | |
| 720 | /* Ensure that we have a valid GPE number */ |
| 721 | |
| 722 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 723 | if (!GpeEventInfo) |
| 724 | { |
| 725 | Status = AE_BAD_PARAMETER; |
| 726 | goto UnlockAndExit; |
| 727 | } |
| 728 | |
| 729 | /* Obtain status on the requested GPE number */ |
| 730 | |
| 731 | Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus); |
| 732 | |
| 733 | UnlockAndExit: |
| 734 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 735 | return_ACPI_STATUS (Status); |
| 736 | } |
| 737 | |
| 738 | ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus) |
| 739 | |
| 740 | |
| 741 | /******************************************************************************* |
| 742 | * |
| 743 | * FUNCTION: AcpiFinishGpe |
| 744 | * |
| 745 | * PARAMETERS: GpeDevice - Namespace node for the GPE Block |
| 746 | * (NULL for FADT defined GPEs) |
| 747 | * GpeNumber - GPE level within the GPE block |
| 748 | * |
| 749 | * RETURN: Status |
| 750 | * |
| 751 | * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE |
| 752 | * processing. Intended for use by asynchronous host-installed |
| 753 | * GPE handlers. The GPE is only reenabled if the EnableForRun bit |
| 754 | * is set in the GPE info. |
| 755 | * |
| 756 | ******************************************************************************/ |
| 757 | |
| 758 | ACPI_STATUS |
| 759 | AcpiFinishGpe ( |
| 760 | ACPI_HANDLE GpeDevice, |
| 761 | UINT32 GpeNumber) |
| 762 | { |
| 763 | ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| 764 | ACPI_STATUS Status; |
| 765 | ACPI_CPU_FLAGS Flags; |
| 766 | |
| 767 | |
| 768 | ACPI_FUNCTION_TRACE (AcpiFinishGpe); |
| 769 | |
| 770 | |
| 771 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 772 | |
| 773 | /* Ensure that we have a valid GPE number */ |
| 774 | |
| 775 | GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| 776 | if (!GpeEventInfo) |
| 777 | { |
| 778 | Status = AE_BAD_PARAMETER; |
| 779 | goto UnlockAndExit; |
| 780 | } |
| 781 | |
| 782 | Status = AcpiEvFinishGpe (GpeEventInfo); |
| 783 | |
| 784 | UnlockAndExit: |
| 785 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 786 | return_ACPI_STATUS (Status); |
| 787 | } |
| 788 | |
| 789 | ACPI_EXPORT_SYMBOL (AcpiFinishGpe) |
| 790 | |
| 791 | |
| 792 | /****************************************************************************** |
| 793 | * |
| 794 | * FUNCTION: AcpiDisableAllGpes |
| 795 | * |
| 796 | * PARAMETERS: None |
| 797 | * |
| 798 | * RETURN: Status |
| 799 | * |
| 800 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks |
| 801 | * |
| 802 | ******************************************************************************/ |
| 803 | |
| 804 | ACPI_STATUS |
| 805 | AcpiDisableAllGpes ( |
| 806 | void) |
| 807 | { |
| 808 | ACPI_STATUS Status; |
| 809 | |
| 810 | |
| 811 | ACPI_FUNCTION_TRACE (AcpiDisableAllGpes); |
| 812 | |
| 813 | |
| 814 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 815 | if (ACPI_FAILURE (Status)) |
| 816 | { |
| 817 | return_ACPI_STATUS (Status); |
| 818 | } |
| 819 | |
| 820 | Status = AcpiHwDisableAllGpes (); |
| 821 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 822 | |
| 823 | return_ACPI_STATUS (Status); |
| 824 | } |
| 825 | |
| 826 | ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes) |
| 827 | |
| 828 | |
| 829 | /****************************************************************************** |
| 830 | * |
| 831 | * FUNCTION: AcpiEnableAllRuntimeGpes |
| 832 | * |
| 833 | * PARAMETERS: None |
| 834 | * |
| 835 | * RETURN: Status |
| 836 | * |
| 837 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks |
| 838 | * |
| 839 | ******************************************************************************/ |
| 840 | |
| 841 | ACPI_STATUS |
| 842 | AcpiEnableAllRuntimeGpes ( |
| 843 | void) |
| 844 | { |
| 845 | ACPI_STATUS Status; |
| 846 | |
| 847 | |
| 848 | ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes); |
| 849 | |
| 850 | |
| 851 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 852 | if (ACPI_FAILURE (Status)) |
| 853 | { |
| 854 | return_ACPI_STATUS (Status); |
| 855 | } |
| 856 | |
| 857 | Status = AcpiHwEnableAllRuntimeGpes (); |
| 858 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 859 | |
| 860 | return_ACPI_STATUS (Status); |
| 861 | } |
| 862 | |
| 863 | ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes) |
| 864 | |
| 865 | |
| 866 | /****************************************************************************** |
| 867 | * |
| 868 | * FUNCTION: AcpiEnableAllWakeupGpes |
| 869 | * |
| 870 | * PARAMETERS: None |
| 871 | * |
| 872 | * RETURN: Status |
| 873 | * |
| 874 | * DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in |
| 875 | * all GPE blocks. |
| 876 | * |
| 877 | ******************************************************************************/ |
| 878 | |
| 879 | ACPI_STATUS |
| 880 | AcpiEnableAllWakeupGpes ( |
| 881 | void) |
| 882 | { |
| 883 | ACPI_STATUS Status; |
| 884 | |
| 885 | |
| 886 | ACPI_FUNCTION_TRACE (AcpiEnableAllWakeupGpes); |
| 887 | |
| 888 | |
| 889 | Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| 890 | if (ACPI_FAILURE (Status)) |
| 891 | { |
| 892 | return_ACPI_STATUS (Status); |
| 893 | } |
| 894 | |
| 895 | Status = AcpiHwEnableAllWakeupGpes (); |
| 896 | (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| 897 | |
| 898 | return_ACPI_STATUS (Status); |
| 899 | } |
| 900 | |
| 901 | ACPI_EXPORT_SYMBOL (AcpiEnableAllWakeupGpes) |
| 902 | |
| 903 | |
| 904 | /******************************************************************************* |
| 905 | * |
| 906 | * FUNCTION: AcpiInstallGpeBlock |
| 907 | * |
| 908 | * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device |
| 909 | * GpeBlockAddress - Address and SpaceID |
| 910 | * RegisterCount - Number of GPE register pairs in the block |
| 911 | * InterruptNumber - H/W interrupt for the block |
| 912 | * |
| 913 | * RETURN: Status |
| 914 | * |
| 915 | * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not |
| 916 | * enabled here. |
| 917 | * |
| 918 | ******************************************************************************/ |
| 919 | |
| 920 | ACPI_STATUS |
| 921 | AcpiInstallGpeBlock ( |
| 922 | ACPI_HANDLE GpeDevice, |
| 923 | ACPI_GENERIC_ADDRESS *GpeBlockAddress, |
| 924 | UINT32 RegisterCount, |
| 925 | UINT32 InterruptNumber) |
| 926 | { |
| 927 | ACPI_STATUS Status; |
| 928 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 929 | ACPI_NAMESPACE_NODE *Node; |
| 930 | ACPI_GPE_BLOCK_INFO *GpeBlock; |
| 931 | |
| 932 | |
| 933 | ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock); |
| 934 | |
| 935 | |
| 936 | if ((!GpeDevice) || |
| 937 | (!GpeBlockAddress) || |
| 938 | (!RegisterCount)) |
| 939 | { |
| 940 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 941 | } |
| 942 | |
| 943 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 944 | if (ACPI_FAILURE (Status)) |
| 945 | { |
| 946 | return_ACPI_STATUS (Status); |
| 947 | } |
| 948 | |
| 949 | Node = AcpiNsValidateHandle (GpeDevice); |
| 950 | if (!Node) |
| 951 | { |
| 952 | Status = AE_BAD_PARAMETER; |
| 953 | goto UnlockAndExit; |
| 954 | } |
| 955 | |
| 956 | /* Validate the parent device */ |
| 957 | |
| 958 | if (Node->Type != ACPI_TYPE_DEVICE) |
| 959 | { |
| 960 | Status = AE_TYPE; |
| 961 | goto UnlockAndExit; |
| 962 | } |
| 963 | |
| 964 | if (Node->Object) |
| 965 | { |
| 966 | Status = AE_ALREADY_EXISTS; |
| 967 | goto UnlockAndExit; |
| 968 | } |
| 969 | |
| 970 | /* |
| 971 | * For user-installed GPE Block Devices, the GpeBlockBaseNumber |
| 972 | * is always zero |
| 973 | */ |
| 974 | Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress->Address, |
| 975 | GpeBlockAddress->SpaceId, RegisterCount, |
| 976 | 0, InterruptNumber, &GpeBlock); |
| 977 | if (ACPI_FAILURE (Status)) |
| 978 | { |
| 979 | goto UnlockAndExit; |
| 980 | } |
| 981 | |
| 982 | /* Install block in the DeviceObject attached to the node */ |
| 983 | |
| 984 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 985 | if (!ObjDesc) |
| 986 | { |
| 987 | /* |
| 988 | * No object, create a new one (Device nodes do not always have |
| 989 | * an attached object) |
| 990 | */ |
| 991 | ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE); |
| 992 | if (!ObjDesc) |
| 993 | { |
| 994 | Status = AE_NO_MEMORY; |
| 995 | goto UnlockAndExit; |
| 996 | } |
| 997 | |
| 998 | Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE); |
| 999 | |
| 1000 | /* Remove local reference to the object */ |
| 1001 | |
| 1002 | AcpiUtRemoveReference (ObjDesc); |
| 1003 | if (ACPI_FAILURE (Status)) |
| 1004 | { |
| 1005 | goto UnlockAndExit; |
| 1006 | } |
| 1007 | } |
| 1008 | |
| 1009 | /* Now install the GPE block in the DeviceObject */ |
| 1010 | |
| 1011 | ObjDesc->Device.GpeBlock = GpeBlock; |
| 1012 | |
| 1013 | |
| 1014 | UnlockAndExit: |
| 1015 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 1016 | return_ACPI_STATUS (Status); |
| 1017 | } |
| 1018 | |
| 1019 | ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock) |
| 1020 | |
| 1021 | |
| 1022 | /******************************************************************************* |
| 1023 | * |
| 1024 | * FUNCTION: AcpiRemoveGpeBlock |
| 1025 | * |
| 1026 | * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device |
| 1027 | * |
| 1028 | * RETURN: Status |
| 1029 | * |
| 1030 | * DESCRIPTION: Remove a previously installed block of GPE registers |
| 1031 | * |
| 1032 | ******************************************************************************/ |
| 1033 | |
| 1034 | ACPI_STATUS |
| 1035 | AcpiRemoveGpeBlock ( |
| 1036 | ACPI_HANDLE GpeDevice) |
| 1037 | { |
| 1038 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 1039 | ACPI_STATUS Status; |
| 1040 | ACPI_NAMESPACE_NODE *Node; |
| 1041 | |
| 1042 | |
| 1043 | ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock); |
| 1044 | |
| 1045 | |
| 1046 | if (!GpeDevice) |
| 1047 | { |
| 1048 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 1049 | } |
| 1050 | |
| 1051 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 1052 | if (ACPI_FAILURE (Status)) |
| 1053 | { |
| 1054 | return_ACPI_STATUS (Status); |
| 1055 | } |
| 1056 | |
| 1057 | Node = AcpiNsValidateHandle (GpeDevice); |
| 1058 | if (!Node) |
| 1059 | { |
| 1060 | Status = AE_BAD_PARAMETER; |
| 1061 | goto UnlockAndExit; |
| 1062 | } |
| 1063 | |
| 1064 | /* Validate the parent device */ |
| 1065 | |
| 1066 | if (Node->Type != ACPI_TYPE_DEVICE) |
| 1067 | { |
| 1068 | Status = AE_TYPE; |
| 1069 | goto UnlockAndExit; |
| 1070 | } |
| 1071 | |
| 1072 | /* Get the DeviceObject attached to the node */ |
| 1073 | |
| 1074 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 1075 | if (!ObjDesc || |
| 1076 | !ObjDesc->Device.GpeBlock) |
| 1077 | { |
| 1078 | return_ACPI_STATUS (AE_NULL_OBJECT); |
| 1079 | } |
| 1080 | |
| 1081 | /* Delete the GPE block (but not the DeviceObject) */ |
| 1082 | |
| 1083 | Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock); |
| 1084 | if (ACPI_SUCCESS (Status)) |
| 1085 | { |
| 1086 | ObjDesc->Device.GpeBlock = NULL; |
| 1087 | } |
| 1088 | |
| 1089 | UnlockAndExit: |
| 1090 | (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 1091 | return_ACPI_STATUS (Status); |
| 1092 | } |
| 1093 | |
| 1094 | ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock) |
| 1095 | |
| 1096 | |
| 1097 | /******************************************************************************* |
| 1098 | * |
| 1099 | * FUNCTION: AcpiGetGpeDevice |
| 1100 | * |
| 1101 | * PARAMETERS: Index - System GPE index (0-CurrentGpeCount) |
| 1102 | * GpeDevice - Where the parent GPE Device is returned |
| 1103 | * |
| 1104 | * RETURN: Status |
| 1105 | * |
| 1106 | * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL |
| 1107 | * gpe device indicates that the gpe number is contained in one of |
| 1108 | * the FADT-defined gpe blocks. Otherwise, the GPE block device. |
| 1109 | * |
| 1110 | ******************************************************************************/ |
| 1111 | |
| 1112 | ACPI_STATUS |
| 1113 | AcpiGetGpeDevice ( |
| 1114 | UINT32 Index, |
| 1115 | ACPI_HANDLE *GpeDevice) |
| 1116 | { |
| 1117 | ACPI_GPE_DEVICE_INFO Info; |
| 1118 | ACPI_STATUS Status; |
| 1119 | |
| 1120 | |
| 1121 | ACPI_FUNCTION_TRACE (AcpiGetGpeDevice); |
| 1122 | |
| 1123 | |
| 1124 | if (!GpeDevice) |
| 1125 | { |
| 1126 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 1127 | } |
| 1128 | |
| 1129 | if (Index >= AcpiCurrentGpeCount) |
| 1130 | { |
| 1131 | return_ACPI_STATUS (AE_NOT_EXIST); |
| 1132 | } |
| 1133 | |
| 1134 | /* Setup and walk the GPE list */ |
| 1135 | |
| 1136 | Info.Index = Index; |
| 1137 | Info.Status = AE_NOT_EXIST; |
| 1138 | Info.GpeDevice = NULL; |
| 1139 | Info.NextBlockBaseIndex = 0; |
| 1140 | |
| 1141 | Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info); |
| 1142 | if (ACPI_FAILURE (Status)) |
| 1143 | { |
| 1144 | return_ACPI_STATUS (Status); |
| 1145 | } |
| 1146 | |
| 1147 | *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice); |
| 1148 | return_ACPI_STATUS (Info.Status); |
| 1149 | } |
| 1150 | |
| 1151 | ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice) |
| 1152 | |
| 1153 | #endif /* !ACPI_REDUCED_HARDWARE */ |
| 1154 | |