1 /******************************************************************************
3 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2015, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
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.
44 #define EXPORT_ACPI_INTERFACES
51 #define _COMPONENT ACPI_EVENTS
52 ACPI_MODULE_NAME ("evxfgpe")
55 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
56 /*******************************************************************************
58 * FUNCTION: AcpiUpdateAllGpes
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.)
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
76 ******************************************************************************/
85 ACPI_FUNCTION_TRACE (AcpiUpdateAllGpes);
88 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
89 if (ACPI_FAILURE (Status))
91 return_ACPI_STATUS (Status);
94 if (AcpiGbl_AllGpesInitialized)
99 Status = AcpiEvWalkGpeList (AcpiEvInitializeGpeBlock, NULL);
100 if (ACPI_SUCCESS (Status))
102 AcpiGbl_AllGpesInitialized = TRUE;
106 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
107 return_ACPI_STATUS (Status);
110 ACPI_EXPORT_SYMBOL (AcpiUpdateAllGpes)
113 /*******************************************************************************
115 * FUNCTION: AcpiEnableGpe
117 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
118 * GpeNumber - GPE level within the GPE block
122 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
125 ******************************************************************************/
129 ACPI_HANDLE GpeDevice,
132 ACPI_STATUS Status = AE_BAD_PARAMETER;
133 ACPI_GPE_EVENT_INFO *GpeEventInfo;
134 ACPI_CPU_FLAGS Flags;
137 ACPI_FUNCTION_TRACE (AcpiEnableGpe);
140 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
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.
147 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
150 if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) !=
151 ACPI_GPE_DISPATCH_NONE)
153 Status = AcpiEvAddGpeReference (GpeEventInfo);
157 Status = AE_NO_HANDLER;
161 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
162 return_ACPI_STATUS (Status);
165 ACPI_EXPORT_SYMBOL (AcpiEnableGpe)
168 /*******************************************************************************
170 * FUNCTION: AcpiDisableGpe
172 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
173 * GpeNumber - GPE level within the GPE block
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)
181 ******************************************************************************/
185 ACPI_HANDLE GpeDevice,
188 ACPI_STATUS Status = AE_BAD_PARAMETER;
189 ACPI_GPE_EVENT_INFO *GpeEventInfo;
190 ACPI_CPU_FLAGS Flags;
193 ACPI_FUNCTION_TRACE (AcpiDisableGpe);
196 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
198 /* Ensure that we have a valid GPE number */
200 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
203 Status = AcpiEvRemoveGpeReference (GpeEventInfo);
206 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
207 return_ACPI_STATUS (Status);
210 ACPI_EXPORT_SYMBOL (AcpiDisableGpe)
213 /*******************************************************************************
215 * FUNCTION: AcpiSetGpe
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
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
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.
240 ******************************************************************************/
244 ACPI_HANDLE GpeDevice,
248 ACPI_GPE_EVENT_INFO *GpeEventInfo;
250 ACPI_CPU_FLAGS Flags;
253 ACPI_FUNCTION_TRACE (AcpiSetGpe);
256 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
258 /* Ensure that we have a valid GPE number */
260 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
263 Status = AE_BAD_PARAMETER;
267 /* Perform the action */
271 case ACPI_GPE_ENABLE:
273 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
276 case ACPI_GPE_DISABLE:
278 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
283 Status = AE_BAD_PARAMETER;
288 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
289 return_ACPI_STATUS (Status);
292 ACPI_EXPORT_SYMBOL (AcpiSetGpe)
295 /*******************************************************************************
297 * FUNCTION: AcpiMarkGpeForWake
299 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
300 * GpeNumber - GPE level within the GPE block
304 * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply
305 * sets the ACPI_GPE_CAN_WAKE flag.
307 * Some potential callers of AcpiSetupGpeForWake may know in advance that
308 * there won't be any notify handlers installed for device wake notifications
309 * from the given GPE (one example is a button GPE in Linux). For these cases,
310 * AcpiMarkGpeForWake should be used instead of AcpiSetupGpeForWake.
311 * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to
312 * setup implicit wake notification for it (since there's no handler method).
314 ******************************************************************************/
318 ACPI_HANDLE GpeDevice,
321 ACPI_GPE_EVENT_INFO *GpeEventInfo;
322 ACPI_STATUS Status = AE_BAD_PARAMETER;
323 ACPI_CPU_FLAGS Flags;
326 ACPI_FUNCTION_TRACE (AcpiMarkGpeForWake);
329 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
331 /* Ensure that we have a valid GPE number */
333 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
336 /* Mark the GPE as a possible wake event */
338 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
342 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
343 return_ACPI_STATUS (Status);
346 ACPI_EXPORT_SYMBOL (AcpiMarkGpeForWake)
349 /*******************************************************************************
351 * FUNCTION: AcpiSetupGpeForWake
353 * PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW)
354 * GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
355 * GpeNumber - GPE level within the GPE block
359 * DESCRIPTION: Mark a GPE as having the ability to wake the system. This
360 * interface is intended to be used as the host executes the
361 * _PRW methods (Power Resources for Wake) in the system tables.
362 * Each _PRW appears under a Device Object (The WakeDevice), and
363 * contains the info for the wake GPE associated with the
366 ******************************************************************************/
369 AcpiSetupGpeForWake (
370 ACPI_HANDLE WakeDevice,
371 ACPI_HANDLE GpeDevice,
375 ACPI_GPE_EVENT_INFO *GpeEventInfo;
376 ACPI_NAMESPACE_NODE *DeviceNode;
377 ACPI_GPE_NOTIFY_INFO *Notify;
378 ACPI_GPE_NOTIFY_INFO *NewNotify;
379 ACPI_CPU_FLAGS Flags;
382 ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake);
385 /* Parameter Validation */
390 * By forcing WakeDevice to be valid, we automatically enable the
391 * implicit notify feature on all hosts.
393 return_ACPI_STATUS (AE_BAD_PARAMETER);
396 /* Handle root object case */
398 if (WakeDevice == ACPI_ROOT_OBJECT)
400 DeviceNode = AcpiGbl_RootNode;
404 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice);
407 /* Validate WakeDevice is of type Device */
409 if (DeviceNode->Type != ACPI_TYPE_DEVICE)
411 return_ACPI_STATUS (AE_BAD_PARAMETER);
415 * Allocate a new notify object up front, in case it is needed.
416 * Memory allocation while holding a spinlock is a big no-no
419 NewNotify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO));
422 return_ACPI_STATUS (AE_NO_MEMORY);
425 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
427 /* Ensure that we have a valid GPE number */
429 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
432 Status = AE_BAD_PARAMETER;
437 * If there is no method or handler for this GPE, then the
438 * WakeDevice will be notified whenever this GPE fires. This is
439 * known as an "implicit notify". Note: The GPE is assumed to be
440 * level-triggered (for windows compatibility).
442 if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
443 ACPI_GPE_DISPATCH_NONE)
446 * This is the first device for implicit notify on this GPE.
447 * Just set the flags here, and enter the NOTIFY block below.
449 GpeEventInfo->Flags =
450 (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
454 * If we already have an implicit notify on this GPE, add
455 * this device to the notify list.
457 if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
458 ACPI_GPE_DISPATCH_NOTIFY)
460 /* Ensure that the device is not already in the list */
462 Notify = GpeEventInfo->Dispatch.NotifyList;
465 if (Notify->DeviceNode == DeviceNode)
467 Status = AE_ALREADY_EXISTS;
470 Notify = Notify->Next;
473 /* Add this device to the notify list for this GPE */
475 NewNotify->DeviceNode = DeviceNode;
476 NewNotify->Next = GpeEventInfo->Dispatch.NotifyList;
477 GpeEventInfo->Dispatch.NotifyList = NewNotify;
481 /* Mark the GPE as a possible wake event */
483 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
488 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
490 /* Delete the notify object if it was not used above */
494 ACPI_FREE (NewNotify);
496 return_ACPI_STATUS (Status);
499 ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake)
502 /*******************************************************************************
504 * FUNCTION: AcpiSetGpeWakeMask
506 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
507 * GpeNumber - GPE level within the GPE block
508 * Action - Enable or Disable
512 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
513 * already be marked as a WAKE GPE.
515 ******************************************************************************/
519 ACPI_HANDLE GpeDevice,
523 ACPI_STATUS Status = AE_OK;
524 ACPI_GPE_EVENT_INFO *GpeEventInfo;
525 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
526 ACPI_CPU_FLAGS Flags;
530 ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask);
533 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
536 * Ensure that we have a valid GPE number and that this GPE is in
539 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
542 Status = AE_BAD_PARAMETER;
546 if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
552 GpeRegisterInfo = GpeEventInfo->RegisterInfo;
553 if (!GpeRegisterInfo)
555 Status = AE_NOT_EXIST;
559 RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
561 /* Perform the action */
565 case ACPI_GPE_ENABLE:
567 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
570 case ACPI_GPE_DISABLE:
572 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
577 ACPI_ERROR ((AE_INFO, "%u, Invalid action", Action));
578 Status = AE_BAD_PARAMETER;
583 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
584 return_ACPI_STATUS (Status);
587 ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask)
590 /*******************************************************************************
592 * FUNCTION: AcpiClearGpe
594 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
595 * GpeNumber - GPE level within the GPE block
599 * DESCRIPTION: Clear an ACPI event (general purpose)
601 ******************************************************************************/
605 ACPI_HANDLE GpeDevice,
608 ACPI_STATUS Status = AE_OK;
609 ACPI_GPE_EVENT_INFO *GpeEventInfo;
610 ACPI_CPU_FLAGS Flags;
613 ACPI_FUNCTION_TRACE (AcpiClearGpe);
616 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
618 /* Ensure that we have a valid GPE number */
620 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
623 Status = AE_BAD_PARAMETER;
627 Status = AcpiHwClearGpe (GpeEventInfo);
630 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
631 return_ACPI_STATUS (Status);
634 ACPI_EXPORT_SYMBOL (AcpiClearGpe)
637 /*******************************************************************************
639 * FUNCTION: AcpiGetGpeStatus
641 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
642 * GpeNumber - GPE level within the GPE block
643 * EventStatus - Where the current status of the event
648 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
650 ******************************************************************************/
654 ACPI_HANDLE GpeDevice,
656 ACPI_EVENT_STATUS *EventStatus)
658 ACPI_STATUS Status = AE_OK;
659 ACPI_GPE_EVENT_INFO *GpeEventInfo;
660 ACPI_CPU_FLAGS Flags;
663 ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
666 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
668 /* Ensure that we have a valid GPE number */
670 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
673 Status = AE_BAD_PARAMETER;
677 /* Obtain status on the requested GPE number */
679 Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus);
682 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
683 return_ACPI_STATUS (Status);
686 ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
689 /*******************************************************************************
691 * FUNCTION: AcpiFinishGpe
693 * PARAMETERS: GpeDevice - Namespace node for the GPE Block
694 * (NULL for FADT defined GPEs)
695 * GpeNumber - GPE level within the GPE block
699 * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
700 * processing. Intended for use by asynchronous host-installed
701 * GPE handlers. The GPE is only reenabled if the EnableForRun bit
702 * is set in the GPE info.
704 ******************************************************************************/
708 ACPI_HANDLE GpeDevice,
711 ACPI_GPE_EVENT_INFO *GpeEventInfo;
713 ACPI_CPU_FLAGS Flags;
716 ACPI_FUNCTION_TRACE (AcpiFinishGpe);
719 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
721 /* Ensure that we have a valid GPE number */
723 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
726 Status = AE_BAD_PARAMETER;
730 Status = AcpiEvFinishGpe (GpeEventInfo);
733 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
734 return_ACPI_STATUS (Status);
737 ACPI_EXPORT_SYMBOL (AcpiFinishGpe)
740 /******************************************************************************
742 * FUNCTION: AcpiDisableAllGpes
748 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
750 ******************************************************************************/
759 ACPI_FUNCTION_TRACE (AcpiDisableAllGpes);
762 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
763 if (ACPI_FAILURE (Status))
765 return_ACPI_STATUS (Status);
768 Status = AcpiHwDisableAllGpes ();
769 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
771 return_ACPI_STATUS (Status);
774 ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes)
777 /******************************************************************************
779 * FUNCTION: AcpiEnableAllRuntimeGpes
785 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
787 ******************************************************************************/
790 AcpiEnableAllRuntimeGpes (
796 ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes);
799 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
800 if (ACPI_FAILURE (Status))
802 return_ACPI_STATUS (Status);
805 Status = AcpiHwEnableAllRuntimeGpes ();
806 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
808 return_ACPI_STATUS (Status);
811 ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes)
814 /******************************************************************************
816 * FUNCTION: AcpiEnableAllWakeupGpes
822 * DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in
825 ******************************************************************************/
828 AcpiEnableAllWakeupGpes (
834 ACPI_FUNCTION_TRACE (AcpiEnableAllWakeupGpes);
837 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
838 if (ACPI_FAILURE (Status))
840 return_ACPI_STATUS (Status);
843 Status = AcpiHwEnableAllWakeupGpes ();
844 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
846 return_ACPI_STATUS (Status);
849 ACPI_EXPORT_SYMBOL (AcpiEnableAllWakeupGpes)
852 /*******************************************************************************
854 * FUNCTION: AcpiInstallGpeBlock
856 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
857 * GpeBlockAddress - Address and SpaceID
858 * RegisterCount - Number of GPE register pairs in the block
859 * InterruptNumber - H/W interrupt for the block
863 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
866 ******************************************************************************/
869 AcpiInstallGpeBlock (
870 ACPI_HANDLE GpeDevice,
871 ACPI_GENERIC_ADDRESS *GpeBlockAddress,
872 UINT32 RegisterCount,
873 UINT32 InterruptNumber)
876 ACPI_OPERAND_OBJECT *ObjDesc;
877 ACPI_NAMESPACE_NODE *Node;
878 ACPI_GPE_BLOCK_INFO *GpeBlock;
881 ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock);
885 (!GpeBlockAddress) ||
888 return_ACPI_STATUS (AE_BAD_PARAMETER);
891 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
892 if (ACPI_FAILURE (Status))
894 return_ACPI_STATUS (Status);
897 Node = AcpiNsValidateHandle (GpeDevice);
900 Status = AE_BAD_PARAMETER;
904 /* Validate the parent device */
906 if (Node->Type != ACPI_TYPE_DEVICE)
914 Status = AE_ALREADY_EXISTS;
919 * For user-installed GPE Block Devices, the GpeBlockBaseNumber
922 Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress->Address,
923 GpeBlockAddress->SpaceId, RegisterCount,
924 0, InterruptNumber, &GpeBlock);
925 if (ACPI_FAILURE (Status))
930 /* Install block in the DeviceObject attached to the node */
932 ObjDesc = AcpiNsGetAttachedObject (Node);
936 * No object, create a new one (Device nodes do not always have
937 * an attached object)
939 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE);
942 Status = AE_NO_MEMORY;
946 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE);
948 /* Remove local reference to the object */
950 AcpiUtRemoveReference (ObjDesc);
951 if (ACPI_FAILURE (Status))
957 /* Now install the GPE block in the DeviceObject */
959 ObjDesc->Device.GpeBlock = GpeBlock;
963 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
964 return_ACPI_STATUS (Status);
967 ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock)
970 /*******************************************************************************
972 * FUNCTION: AcpiRemoveGpeBlock
974 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
978 * DESCRIPTION: Remove a previously installed block of GPE registers
980 ******************************************************************************/
984 ACPI_HANDLE GpeDevice)
986 ACPI_OPERAND_OBJECT *ObjDesc;
988 ACPI_NAMESPACE_NODE *Node;
991 ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock);
996 return_ACPI_STATUS (AE_BAD_PARAMETER);
999 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
1000 if (ACPI_FAILURE (Status))
1002 return_ACPI_STATUS (Status);
1005 Node = AcpiNsValidateHandle (GpeDevice);
1008 Status = AE_BAD_PARAMETER;
1012 /* Validate the parent device */
1014 if (Node->Type != ACPI_TYPE_DEVICE)
1020 /* Get the DeviceObject attached to the node */
1022 ObjDesc = AcpiNsGetAttachedObject (Node);
1024 !ObjDesc->Device.GpeBlock)
1026 return_ACPI_STATUS (AE_NULL_OBJECT);
1029 /* Delete the GPE block (but not the DeviceObject) */
1031 Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock);
1032 if (ACPI_SUCCESS (Status))
1034 ObjDesc->Device.GpeBlock = NULL;
1038 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
1039 return_ACPI_STATUS (Status);
1042 ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock)
1045 /*******************************************************************************
1047 * FUNCTION: AcpiGetGpeDevice
1049 * PARAMETERS: Index - System GPE index (0-CurrentGpeCount)
1050 * GpeDevice - Where the parent GPE Device is returned
1054 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
1055 * gpe device indicates that the gpe number is contained in one of
1056 * the FADT-defined gpe blocks. Otherwise, the GPE block device.
1058 ******************************************************************************/
1063 ACPI_HANDLE *GpeDevice)
1065 ACPI_GPE_DEVICE_INFO Info;
1069 ACPI_FUNCTION_TRACE (AcpiGetGpeDevice);
1074 return_ACPI_STATUS (AE_BAD_PARAMETER);
1077 if (Index >= AcpiCurrentGpeCount)
1079 return_ACPI_STATUS (AE_NOT_EXIST);
1082 /* Setup and walk the GPE list */
1085 Info.Status = AE_NOT_EXIST;
1086 Info.GpeDevice = NULL;
1087 Info.NextBlockBaseIndex = 0;
1089 Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info);
1090 if (ACPI_FAILURE (Status))
1092 return_ACPI_STATUS (Status);
1095 *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice);
1096 return_ACPI_STATUS (Info.Status);
1099 ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice)
1101 #endif /* !ACPI_REDUCED_HARDWARE */