1 /******************************************************************************
3 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2014, Intel Corp.
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46 #define EXPORT_ACPI_INTERFACES
53 #define _COMPONENT ACPI_EVENTS
54 ACPI_MODULE_NAME ("evxfgpe")
57 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
58 /*******************************************************************************
60 * FUNCTION: AcpiUpdateAllGpes
66 * DESCRIPTION: Complete GPE initialization and enable all GPEs that have
67 * associated _Lxx or _Exx methods and are not pointed to by any
68 * device _PRW methods (this indicates that these GPEs are
69 * generally intended for system or device wakeup. Such GPEs
70 * have to be enabled directly when the devices whose _PRW
71 * methods point to them are set up for wakeup signaling.)
73 * NOTE: Should be called after any GPEs are added to the system. Primarily,
74 * after the system _PRW methods have been run, but also after a GPE Block
75 * Device has been added or if any new GPE methods have been added via a
78 ******************************************************************************/
87 ACPI_FUNCTION_TRACE (AcpiUpdateAllGpes);
90 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
91 if (ACPI_FAILURE (Status))
93 return_ACPI_STATUS (Status);
96 if (AcpiGbl_AllGpesInitialized)
101 Status = AcpiEvWalkGpeList (AcpiEvInitializeGpeBlock, NULL);
102 if (ACPI_SUCCESS (Status))
104 AcpiGbl_AllGpesInitialized = TRUE;
108 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
109 return_ACPI_STATUS (Status);
112 ACPI_EXPORT_SYMBOL (AcpiUpdateAllGpes)
115 /*******************************************************************************
117 * FUNCTION: AcpiEnableGpe
119 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
120 * GpeNumber - GPE level within the GPE block
124 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
127 ******************************************************************************/
131 ACPI_HANDLE GpeDevice,
134 ACPI_STATUS Status = AE_BAD_PARAMETER;
135 ACPI_GPE_EVENT_INFO *GpeEventInfo;
136 ACPI_CPU_FLAGS Flags;
139 ACPI_FUNCTION_TRACE (AcpiEnableGpe);
142 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
144 /* Ensure that we have a valid GPE number */
146 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
149 Status = AcpiEvAddGpeReference (GpeEventInfo);
152 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
153 return_ACPI_STATUS (Status);
156 ACPI_EXPORT_SYMBOL (AcpiEnableGpe)
159 /*******************************************************************************
161 * FUNCTION: AcpiDisableGpe
163 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
164 * GpeNumber - GPE level within the GPE block
168 * DESCRIPTION: Remove a reference to a GPE. When the last reference is
169 * removed, only then is the GPE disabled (for runtime GPEs), or
170 * the GPE mask bit disabled (for wake GPEs)
172 ******************************************************************************/
176 ACPI_HANDLE GpeDevice,
179 ACPI_STATUS Status = AE_BAD_PARAMETER;
180 ACPI_GPE_EVENT_INFO *GpeEventInfo;
181 ACPI_CPU_FLAGS Flags;
184 ACPI_FUNCTION_TRACE (AcpiDisableGpe);
187 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
189 /* Ensure that we have a valid GPE number */
191 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
194 Status = AcpiEvRemoveGpeReference (GpeEventInfo);
197 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
198 return_ACPI_STATUS (Status);
201 ACPI_EXPORT_SYMBOL (AcpiDisableGpe)
204 /*******************************************************************************
206 * FUNCTION: AcpiSetGpe
208 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
209 * GpeNumber - GPE level within the GPE block
210 * Action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
214 * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
215 * the reference count mechanism used in the AcpiEnableGpe and
216 * AcpiDisableGpe interfaces -- and should be used with care.
218 * Note: Typically used to disable a runtime GPE for short period of time,
219 * then re-enable it, without disturbing the existing reference counts. This
220 * is useful, for example, in the Embedded Controller (EC) driver.
222 ******************************************************************************/
226 ACPI_HANDLE GpeDevice,
230 ACPI_GPE_EVENT_INFO *GpeEventInfo;
232 ACPI_CPU_FLAGS Flags;
235 ACPI_FUNCTION_TRACE (AcpiSetGpe);
238 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
240 /* Ensure that we have a valid GPE number */
242 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
245 Status = AE_BAD_PARAMETER;
249 /* Perform the action */
253 case ACPI_GPE_ENABLE:
255 Status = AcpiEvEnableGpe (GpeEventInfo);
258 case ACPI_GPE_DISABLE:
260 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
265 Status = AE_BAD_PARAMETER;
270 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
271 return_ACPI_STATUS (Status);
274 ACPI_EXPORT_SYMBOL (AcpiSetGpe)
277 /*******************************************************************************
279 * FUNCTION: AcpiSetupGpeForWake
281 * PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW)
282 * GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
283 * GpeNumber - GPE level within the GPE block
287 * DESCRIPTION: Mark a GPE as having the ability to wake the system. This
288 * interface is intended to be used as the host executes the
289 * _PRW methods (Power Resources for Wake) in the system tables.
290 * Each _PRW appears under a Device Object (The WakeDevice), and
291 * contains the info for the wake GPE associated with the
294 ******************************************************************************/
297 AcpiSetupGpeForWake (
298 ACPI_HANDLE WakeDevice,
299 ACPI_HANDLE GpeDevice,
303 ACPI_GPE_EVENT_INFO *GpeEventInfo;
304 ACPI_NAMESPACE_NODE *DeviceNode;
305 ACPI_GPE_NOTIFY_INFO *Notify;
306 ACPI_GPE_NOTIFY_INFO *NewNotify;
307 ACPI_CPU_FLAGS Flags;
310 ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake);
313 /* Parameter Validation */
318 * By forcing WakeDevice to be valid, we automatically enable the
319 * implicit notify feature on all hosts.
321 return_ACPI_STATUS (AE_BAD_PARAMETER);
324 /* Handle root object case */
326 if (WakeDevice == ACPI_ROOT_OBJECT)
328 DeviceNode = AcpiGbl_RootNode;
332 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice);
335 /* Validate WakeDevice is of type Device */
337 if (DeviceNode->Type != ACPI_TYPE_DEVICE)
339 return_ACPI_STATUS (AE_BAD_PARAMETER);
343 * Allocate a new notify object up front, in case it is needed.
344 * Memory allocation while holding a spinlock is a big no-no
347 NewNotify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO));
350 return_ACPI_STATUS (AE_NO_MEMORY);
353 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
355 /* Ensure that we have a valid GPE number */
357 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
360 Status = AE_BAD_PARAMETER;
365 * If there is no method or handler for this GPE, then the
366 * WakeDevice will be notified whenever this GPE fires. This is
367 * known as an "implicit notify". Note: The GPE is assumed to be
368 * level-triggered (for windows compatibility).
370 if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
371 ACPI_GPE_DISPATCH_NONE)
374 * This is the first device for implicit notify on this GPE.
375 * Just set the flags here, and enter the NOTIFY block below.
377 GpeEventInfo->Flags =
378 (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
382 * If we already have an implicit notify on this GPE, add
383 * this device to the notify list.
385 if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
386 ACPI_GPE_DISPATCH_NOTIFY)
388 /* Ensure that the device is not already in the list */
390 Notify = GpeEventInfo->Dispatch.NotifyList;
393 if (Notify->DeviceNode == DeviceNode)
395 Status = AE_ALREADY_EXISTS;
398 Notify = Notify->Next;
401 /* Add this device to the notify list for this GPE */
403 NewNotify->DeviceNode = DeviceNode;
404 NewNotify->Next = GpeEventInfo->Dispatch.NotifyList;
405 GpeEventInfo->Dispatch.NotifyList = NewNotify;
409 /* Mark the GPE as a possible wake event */
411 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
416 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
418 /* Delete the notify object if it was not used above */
422 ACPI_FREE (NewNotify);
424 return_ACPI_STATUS (Status);
427 ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake)
430 /*******************************************************************************
432 * FUNCTION: AcpiSetGpeWakeMask
434 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
435 * GpeNumber - GPE level within the GPE block
436 * Action - Enable or Disable
440 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
441 * already be marked as a WAKE GPE.
443 ******************************************************************************/
447 ACPI_HANDLE GpeDevice,
451 ACPI_STATUS Status = AE_OK;
452 ACPI_GPE_EVENT_INFO *GpeEventInfo;
453 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
454 ACPI_CPU_FLAGS Flags;
458 ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask);
461 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
464 * Ensure that we have a valid GPE number and that this GPE is in
467 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
470 Status = AE_BAD_PARAMETER;
474 if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
480 GpeRegisterInfo = GpeEventInfo->RegisterInfo;
481 if (!GpeRegisterInfo)
483 Status = AE_NOT_EXIST;
487 RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
489 /* Perform the action */
493 case ACPI_GPE_ENABLE:
495 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
498 case ACPI_GPE_DISABLE:
500 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
505 ACPI_ERROR ((AE_INFO, "%u, Invalid action", Action));
506 Status = AE_BAD_PARAMETER;
511 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
512 return_ACPI_STATUS (Status);
515 ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask)
518 /*******************************************************************************
520 * FUNCTION: AcpiClearGpe
522 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
523 * GpeNumber - GPE level within the GPE block
527 * DESCRIPTION: Clear an ACPI event (general purpose)
529 ******************************************************************************/
533 ACPI_HANDLE GpeDevice,
536 ACPI_STATUS Status = AE_OK;
537 ACPI_GPE_EVENT_INFO *GpeEventInfo;
538 ACPI_CPU_FLAGS Flags;
541 ACPI_FUNCTION_TRACE (AcpiClearGpe);
544 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
546 /* Ensure that we have a valid GPE number */
548 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
551 Status = AE_BAD_PARAMETER;
555 Status = AcpiHwClearGpe (GpeEventInfo);
558 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
559 return_ACPI_STATUS (Status);
562 ACPI_EXPORT_SYMBOL (AcpiClearGpe)
565 /*******************************************************************************
567 * FUNCTION: AcpiGetGpeStatus
569 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
570 * GpeNumber - GPE level within the GPE block
571 * EventStatus - Where the current status of the event
576 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
578 ******************************************************************************/
582 ACPI_HANDLE GpeDevice,
584 ACPI_EVENT_STATUS *EventStatus)
586 ACPI_STATUS Status = AE_OK;
587 ACPI_GPE_EVENT_INFO *GpeEventInfo;
588 ACPI_CPU_FLAGS Flags;
591 ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
594 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
596 /* Ensure that we have a valid GPE number */
598 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
601 Status = AE_BAD_PARAMETER;
605 /* Obtain status on the requested GPE number */
607 Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus);
610 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
611 return_ACPI_STATUS (Status);
614 ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
617 /*******************************************************************************
619 * FUNCTION: AcpiFinishGpe
621 * PARAMETERS: GpeDevice - Namespace node for the GPE Block
622 * (NULL for FADT defined GPEs)
623 * GpeNumber - GPE level within the GPE block
627 * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
628 * processing. Intended for use by asynchronous host-installed
629 * GPE handlers. The GPE is only reenabled if the EnableForRun bit
630 * is set in the GPE info.
632 ******************************************************************************/
636 ACPI_HANDLE GpeDevice,
639 ACPI_GPE_EVENT_INFO *GpeEventInfo;
641 ACPI_CPU_FLAGS Flags;
644 ACPI_FUNCTION_TRACE (AcpiFinishGpe);
647 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
649 /* Ensure that we have a valid GPE number */
651 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
654 Status = AE_BAD_PARAMETER;
658 Status = AcpiEvFinishGpe (GpeEventInfo);
661 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
662 return_ACPI_STATUS (Status);
665 ACPI_EXPORT_SYMBOL (AcpiFinishGpe)
668 /******************************************************************************
670 * FUNCTION: AcpiDisableAllGpes
676 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
678 ******************************************************************************/
687 ACPI_FUNCTION_TRACE (AcpiDisableAllGpes);
690 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
691 if (ACPI_FAILURE (Status))
693 return_ACPI_STATUS (Status);
696 Status = AcpiHwDisableAllGpes ();
697 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
699 return_ACPI_STATUS (Status);
702 ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes)
705 /******************************************************************************
707 * FUNCTION: AcpiEnableAllRuntimeGpes
713 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
715 ******************************************************************************/
718 AcpiEnableAllRuntimeGpes (
724 ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes);
727 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
728 if (ACPI_FAILURE (Status))
730 return_ACPI_STATUS (Status);
733 Status = AcpiHwEnableAllRuntimeGpes ();
734 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
736 return_ACPI_STATUS (Status);
739 ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes)
742 /*******************************************************************************
744 * FUNCTION: AcpiInstallGpeBlock
746 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
747 * GpeBlockAddress - Address and SpaceID
748 * RegisterCount - Number of GPE register pairs in the block
749 * InterruptNumber - H/W interrupt for the block
753 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
756 ******************************************************************************/
759 AcpiInstallGpeBlock (
760 ACPI_HANDLE GpeDevice,
761 ACPI_GENERIC_ADDRESS *GpeBlockAddress,
762 UINT32 RegisterCount,
763 UINT32 InterruptNumber)
766 ACPI_OPERAND_OBJECT *ObjDesc;
767 ACPI_NAMESPACE_NODE *Node;
768 ACPI_GPE_BLOCK_INFO *GpeBlock;
771 ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock);
775 (!GpeBlockAddress) ||
778 return_ACPI_STATUS (AE_BAD_PARAMETER);
781 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
782 if (ACPI_FAILURE (Status))
784 return_ACPI_STATUS (Status);
787 Node = AcpiNsValidateHandle (GpeDevice);
790 Status = AE_BAD_PARAMETER;
794 /* Validate the parent device */
796 if (Node->Type != ACPI_TYPE_DEVICE)
804 Status = AE_ALREADY_EXISTS;
809 * For user-installed GPE Block Devices, the GpeBlockBaseNumber
812 Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress->Address,
813 GpeBlockAddress->SpaceId, RegisterCount,
814 0, InterruptNumber, &GpeBlock);
815 if (ACPI_FAILURE (Status))
820 /* Install block in the DeviceObject attached to the node */
822 ObjDesc = AcpiNsGetAttachedObject (Node);
826 * No object, create a new one (Device nodes do not always have
827 * an attached object)
829 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE);
832 Status = AE_NO_MEMORY;
836 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE);
838 /* Remove local reference to the object */
840 AcpiUtRemoveReference (ObjDesc);
841 if (ACPI_FAILURE (Status))
847 /* Now install the GPE block in the DeviceObject */
849 ObjDesc->Device.GpeBlock = GpeBlock;
853 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
854 return_ACPI_STATUS (Status);
857 ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock)
860 /*******************************************************************************
862 * FUNCTION: AcpiRemoveGpeBlock
864 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
868 * DESCRIPTION: Remove a previously installed block of GPE registers
870 ******************************************************************************/
874 ACPI_HANDLE GpeDevice)
876 ACPI_OPERAND_OBJECT *ObjDesc;
878 ACPI_NAMESPACE_NODE *Node;
881 ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock);
886 return_ACPI_STATUS (AE_BAD_PARAMETER);
889 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
890 if (ACPI_FAILURE (Status))
892 return_ACPI_STATUS (Status);
895 Node = AcpiNsValidateHandle (GpeDevice);
898 Status = AE_BAD_PARAMETER;
902 /* Validate the parent device */
904 if (Node->Type != ACPI_TYPE_DEVICE)
910 /* Get the DeviceObject attached to the node */
912 ObjDesc = AcpiNsGetAttachedObject (Node);
914 !ObjDesc->Device.GpeBlock)
916 return_ACPI_STATUS (AE_NULL_OBJECT);
919 /* Delete the GPE block (but not the DeviceObject) */
921 Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock);
922 if (ACPI_SUCCESS (Status))
924 ObjDesc->Device.GpeBlock = NULL;
928 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
929 return_ACPI_STATUS (Status);
932 ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock)
935 /*******************************************************************************
937 * FUNCTION: AcpiGetGpeDevice
939 * PARAMETERS: Index - System GPE index (0-CurrentGpeCount)
940 * GpeDevice - Where the parent GPE Device is returned
944 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
945 * gpe device indicates that the gpe number is contained in one of
946 * the FADT-defined gpe blocks. Otherwise, the GPE block device.
948 ******************************************************************************/
953 ACPI_HANDLE *GpeDevice)
955 ACPI_GPE_DEVICE_INFO Info;
959 ACPI_FUNCTION_TRACE (AcpiGetGpeDevice);
964 return_ACPI_STATUS (AE_BAD_PARAMETER);
967 if (Index >= AcpiCurrentGpeCount)
969 return_ACPI_STATUS (AE_NOT_EXIST);
972 /* Setup and walk the GPE list */
975 Info.Status = AE_NOT_EXIST;
976 Info.GpeDevice = NULL;
977 Info.NextBlockBaseIndex = 0;
979 Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info);
980 if (ACPI_FAILURE (Status))
982 return_ACPI_STATUS (Status);
985 *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice);
986 return_ACPI_STATUS (Info.Status);
989 ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice)
991 #endif /* !ACPI_REDUCED_HARDWARE */