evxfevnt.c revision 193251 
1/******************************************************************************
2 *
3 * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
4 *              $Revision: 1.93 $
5 *
6 *****************************************************************************/
7
8/******************************************************************************
9 *
10 * 1. Copyright Notice
11 *
12 * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp.
13 * All rights reserved.
14 *
15 * 2. License
16 *
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights.  You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
20 * property rights.
21 *
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
28 *
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code.  No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
37 *
38 * The above copyright and patent license is granted only if the following
39 * conditions are met:
40 *
41 * 3. Conditions
42 *
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision.  In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change.  Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee.  Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
54 *
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution.  In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
65 * make.
66 *
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3.4. Intel retains all right, title, and interest in and to the Original
74 * Intel Code.
75 *
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
80 *
81 * 4. Disclaimer and Export Compliance
82 *
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
89 * PARTICULAR PURPOSE.
90 *
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
98 * LIMITED REMEDY.
99 *
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government.  In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
114 *
115 *****************************************************************************/
116
117
118#define __EVXFEVNT_C__
119
120#include "acpi.h"
121#include "acevents.h"
122#include "acnamesp.h"
123#include "actables.h"
124
125#define _COMPONENT          ACPI_EVENTS
126        ACPI_MODULE_NAME    ("evxfevnt")
127
128
129/*******************************************************************************
130 *
131 * FUNCTION:    AcpiEnable
132 *
133 * PARAMETERS:  None
134 *
135 * RETURN:      Status
136 *
137 * DESCRIPTION: Transfers the system into ACPI mode.
138 *
139 ******************************************************************************/
140
141ACPI_STATUS
142AcpiEnable (
143    void)
144{
145    ACPI_STATUS             Status = AE_OK;
146
147
148    ACPI_FUNCTION_TRACE (AcpiEnable);
149
150
151    /* ACPI tables must be present */
152
153    if (!AcpiTbTablesLoaded ())
154    {
155        return_ACPI_STATUS (AE_NO_ACPI_TABLES);
156    }
157
158    /* Check current mode */
159
160    if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
161    {
162        ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
163    }
164    else
165    {
166        /* Transition to ACPI mode */
167
168        Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
169        if (ACPI_FAILURE (Status))
170        {
171            ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode"));
172            return_ACPI_STATUS (Status);
173        }
174
175        ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
176            "Transition to ACPI mode successful\n"));
177    }
178
179    return_ACPI_STATUS (Status);
180}
181
182ACPI_EXPORT_SYMBOL (AcpiEnable)
183
184
185/*******************************************************************************
186 *
187 * FUNCTION:    AcpiDisable
188 *
189 * PARAMETERS:  None
190 *
191 * RETURN:      Status
192 *
193 * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
194 *
195 ******************************************************************************/
196
197ACPI_STATUS
198AcpiDisable (
199    void)
200{
201    ACPI_STATUS             Status = AE_OK;
202
203
204    ACPI_FUNCTION_TRACE (AcpiDisable);
205
206
207    if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
208    {
209        ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
210            "System is already in legacy (non-ACPI) mode\n"));
211    }
212    else
213    {
214        /* Transition to LEGACY mode */
215
216        Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
217
218        if (ACPI_FAILURE (Status))
219        {
220            ACPI_ERROR ((AE_INFO,
221                "Could not exit ACPI mode to legacy mode"));
222            return_ACPI_STATUS (Status);
223        }
224
225        ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
226    }
227
228    return_ACPI_STATUS (Status);
229}
230
231ACPI_EXPORT_SYMBOL (AcpiDisable)
232
233
234/*******************************************************************************
235 *
236 * FUNCTION:    AcpiEnableEvent
237 *
238 * PARAMETERS:  Event           - The fixed eventto be enabled
239 *              Flags           - Reserved
240 *
241 * RETURN:      Status
242 *
243 * DESCRIPTION: Enable an ACPI event (fixed)
244 *
245 ******************************************************************************/
246
247ACPI_STATUS
248AcpiEnableEvent (
249    UINT32                  Event,
250    UINT32                  Flags)
251{
252    ACPI_STATUS             Status = AE_OK;
253    UINT32                  Value;
254
255
256    ACPI_FUNCTION_TRACE (AcpiEnableEvent);
257
258
259    /* Decode the Fixed Event */
260
261    if (Event > ACPI_EVENT_MAX)
262    {
263        return_ACPI_STATUS (AE_BAD_PARAMETER);
264    }
265
266    /*
267     * Enable the requested fixed event (by writing a one to the
268     * enable register bit)
269     */
270    Status = AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 1);
271    if (ACPI_FAILURE (Status))
272    {
273        return_ACPI_STATUS (Status);
274    }
275
276    /* Make sure that the hardware responded */
277
278    Status = AcpiGetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
279                    &Value);
280    if (ACPI_FAILURE (Status))
281    {
282        return_ACPI_STATUS (Status);
283    }
284
285    if (Value != 1)
286    {
287        ACPI_ERROR ((AE_INFO,
288            "Could not enable %s event", AcpiUtGetEventName (Event)));
289        return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
290    }
291
292    return_ACPI_STATUS (Status);
293}
294
295ACPI_EXPORT_SYMBOL (AcpiEnableEvent)
296
297
298/*******************************************************************************
299 *
300 * FUNCTION:    AcpiSetGpeType
301 *
302 * PARAMETERS:  GpeDevice       - Parent GPE Device
303 *              GpeNumber       - GPE level within the GPE block
304 *              Type            - New GPE type
305 *
306 * RETURN:      Status
307 *
308 * DESCRIPTION: Set the type of an individual GPE
309 *
310 ******************************************************************************/
311
312ACPI_STATUS
313AcpiSetGpeType (
314    ACPI_HANDLE             GpeDevice,
315    UINT32                  GpeNumber,
316    UINT8                   Type)
317{
318    ACPI_STATUS             Status = AE_OK;
319    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
320
321
322    ACPI_FUNCTION_TRACE (AcpiSetGpeType);
323
324
325    /* Ensure that we have a valid GPE number */
326
327    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
328    if (!GpeEventInfo)
329    {
330        Status = AE_BAD_PARAMETER;
331        goto UnlockAndExit;
332    }
333
334    if ((GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) == Type)
335    {
336        return_ACPI_STATUS (AE_OK);
337    }
338
339    /* Set the new type (will disable GPE if currently enabled) */
340
341    Status = AcpiEvSetGpeType (GpeEventInfo, Type);
342
343UnlockAndExit:
344    return_ACPI_STATUS (Status);
345}
346
347ACPI_EXPORT_SYMBOL (AcpiSetGpeType)
348
349
350/*******************************************************************************
351 *
352 * FUNCTION:    AcpiEnableGpe
353 *
354 * PARAMETERS:  GpeDevice       - Parent GPE Device
355 *              GpeNumber       - GPE level within the GPE block
356 *              Flags           - Just enable, or also wake enable?
357 *                                Called from ISR or not
358 *
359 * RETURN:      Status
360 *
361 * DESCRIPTION: Enable an ACPI event (general purpose)
362 *
363 ******************************************************************************/
364
365ACPI_STATUS
366AcpiEnableGpe (
367    ACPI_HANDLE             GpeDevice,
368    UINT32                  GpeNumber,
369    UINT32                  Flags)
370{
371    ACPI_STATUS             Status = AE_OK;
372    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
373
374
375    ACPI_FUNCTION_TRACE (AcpiEnableGpe);
376
377
378    /* Use semaphore lock if not executing at interrupt level */
379
380    if (Flags & ACPI_NOT_ISR)
381    {
382        Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
383        if (ACPI_FAILURE (Status))
384        {
385            return_ACPI_STATUS (Status);
386        }
387    }
388
389    /* Ensure that we have a valid GPE number */
390
391    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
392    if (!GpeEventInfo)
393    {
394        Status = AE_BAD_PARAMETER;
395        goto UnlockAndExit;
396    }
397
398    /* Perform the enable */
399
400    Status = AcpiEvEnableGpe (GpeEventInfo, TRUE);
401
402UnlockAndExit:
403    if (Flags & ACPI_NOT_ISR)
404    {
405        (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
406    }
407    return_ACPI_STATUS (Status);
408}
409
410ACPI_EXPORT_SYMBOL (AcpiEnableGpe)
411
412
413/*******************************************************************************
414 *
415 * FUNCTION:    AcpiDisableGpe
416 *
417 * PARAMETERS:  GpeDevice       - Parent GPE Device
418 *              GpeNumber       - GPE level within the GPE block
419 *              Flags           - Just disable, or also wake disable?
420 *                                Called from ISR or not
421 *
422 * RETURN:      Status
423 *
424 * DESCRIPTION: Disable an ACPI event (general purpose)
425 *
426 ******************************************************************************/
427
428ACPI_STATUS
429AcpiDisableGpe (
430    ACPI_HANDLE             GpeDevice,
431    UINT32                  GpeNumber,
432    UINT32                  Flags)
433{
434    ACPI_STATUS             Status = AE_OK;
435    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
436
437
438    ACPI_FUNCTION_TRACE (AcpiDisableGpe);
439
440
441    /* Use semaphore lock if not executing at interrupt level */
442
443    if (Flags & ACPI_NOT_ISR)
444    {
445        Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
446        if (ACPI_FAILURE (Status))
447        {
448            return_ACPI_STATUS (Status);
449        }
450    }
451
452    /* Ensure that we have a valid GPE number */
453
454    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
455    if (!GpeEventInfo)
456    {
457        Status = AE_BAD_PARAMETER;
458        goto UnlockAndExit;
459    }
460
461    Status = AcpiEvDisableGpe (GpeEventInfo);
462
463UnlockAndExit:
464    if (Flags & ACPI_NOT_ISR)
465    {
466        (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
467    }
468    return_ACPI_STATUS (Status);
469}
470
471ACPI_EXPORT_SYMBOL (AcpiDisableGpe)
472
473
474/*******************************************************************************
475 *
476 * FUNCTION:    AcpiDisableEvent
477 *
478 * PARAMETERS:  Event           - The fixed eventto be enabled
479 *              Flags           - Reserved
480 *
481 * RETURN:      Status
482 *
483 * DESCRIPTION: Disable an ACPI event (fixed)
484 *
485 ******************************************************************************/
486
487ACPI_STATUS
488AcpiDisableEvent (
489    UINT32                  Event,
490    UINT32                  Flags)
491{
492    ACPI_STATUS             Status = AE_OK;
493    UINT32                  Value;
494
495
496    ACPI_FUNCTION_TRACE (AcpiDisableEvent);
497
498
499    /* Decode the Fixed Event */
500
501    if (Event > ACPI_EVENT_MAX)
502    {
503        return_ACPI_STATUS (AE_BAD_PARAMETER);
504    }
505
506    /*
507     * Disable the requested fixed event (by writing a zero to the
508     * enable register bit)
509     */
510    Status = AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 0);
511    if (ACPI_FAILURE (Status))
512    {
513        return_ACPI_STATUS (Status);
514    }
515
516    Status = AcpiGetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
517                &Value);
518    if (ACPI_FAILURE (Status))
519    {
520        return_ACPI_STATUS (Status);
521    }
522
523    if (Value != 0)
524    {
525        ACPI_ERROR ((AE_INFO,
526            "Could not disable %s events", AcpiUtGetEventName (Event)));
527        return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
528    }
529
530    return_ACPI_STATUS (Status);
531}
532
533ACPI_EXPORT_SYMBOL (AcpiDisableEvent)
534
535
536/*******************************************************************************
537 *
538 * FUNCTION:    AcpiClearEvent
539 *
540 * PARAMETERS:  Event           - The fixed event to be cleared
541 *
542 * RETURN:      Status
543 *
544 * DESCRIPTION: Clear an ACPI event (fixed)
545 *
546 ******************************************************************************/
547
548ACPI_STATUS
549AcpiClearEvent (
550    UINT32                  Event)
551{
552    ACPI_STATUS             Status = AE_OK;
553
554
555    ACPI_FUNCTION_TRACE (AcpiClearEvent);
556
557
558    /* Decode the Fixed Event */
559
560    if (Event > ACPI_EVENT_MAX)
561    {
562        return_ACPI_STATUS (AE_BAD_PARAMETER);
563    }
564
565    /*
566     * Clear the requested fixed event (By writing a one to the
567     * status register bit)
568     */
569    Status = AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].StatusRegisterId, 1);
570
571    return_ACPI_STATUS (Status);
572}
573
574ACPI_EXPORT_SYMBOL (AcpiClearEvent)
575
576
577/*******************************************************************************
578 *
579 * FUNCTION:    AcpiClearGpe
580 *
581 * PARAMETERS:  GpeDevice       - Parent GPE Device
582 *              GpeNumber       - GPE level within the GPE block
583 *              Flags           - Called from an ISR or not
584 *
585 * RETURN:      Status
586 *
587 * DESCRIPTION: Clear an ACPI event (general purpose)
588 *
589 ******************************************************************************/
590
591ACPI_STATUS
592AcpiClearGpe (
593    ACPI_HANDLE             GpeDevice,
594    UINT32                  GpeNumber,
595    UINT32                  Flags)
596{
597    ACPI_STATUS             Status = AE_OK;
598    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
599
600
601    ACPI_FUNCTION_TRACE (AcpiClearGpe);
602
603
604    /* Use semaphore lock if not executing at interrupt level */
605
606    if (Flags & ACPI_NOT_ISR)
607    {
608        Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
609        if (ACPI_FAILURE (Status))
610        {
611            return_ACPI_STATUS (Status);
612        }
613    }
614
615    /* Ensure that we have a valid GPE number */
616
617    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
618    if (!GpeEventInfo)
619    {
620        Status = AE_BAD_PARAMETER;
621        goto UnlockAndExit;
622    }
623
624    Status = AcpiHwClearGpe (GpeEventInfo);
625
626UnlockAndExit:
627    if (Flags & ACPI_NOT_ISR)
628    {
629        (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
630    }
631    return_ACPI_STATUS (Status);
632}
633
634ACPI_EXPORT_SYMBOL (AcpiClearGpe)
635
636
637/*******************************************************************************
638 *
639 * FUNCTION:    AcpiGetEventStatus
640 *
641 * PARAMETERS:  Event           - The fixed event
642 *              EventStatus     - Where the current status of the event will
643 *                                be returned
644 *
645 * RETURN:      Status
646 *
647 * DESCRIPTION: Obtains and returns the current status of the event
648 *
649 ******************************************************************************/
650
651ACPI_STATUS
652AcpiGetEventStatus (
653    UINT32                  Event,
654    ACPI_EVENT_STATUS       *EventStatus)
655{
656    ACPI_STATUS             Status = AE_OK;
657
658
659    ACPI_FUNCTION_TRACE (AcpiGetEventStatus);
660
661
662    if (!EventStatus)
663    {
664        return_ACPI_STATUS (AE_BAD_PARAMETER);
665    }
666
667    /* Decode the Fixed Event */
668
669    if (Event > ACPI_EVENT_MAX)
670    {
671        return_ACPI_STATUS (AE_BAD_PARAMETER);
672    }
673
674    /* Get the status of the requested fixed event */
675
676    Status = AcpiGetRegister (AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
677                    EventStatus);
678
679    return_ACPI_STATUS (Status);
680}
681
682ACPI_EXPORT_SYMBOL (AcpiGetEventStatus)
683
684
685/*******************************************************************************
686 *
687 * FUNCTION:    AcpiGetGpeStatus
688 *
689 * PARAMETERS:  GpeDevice       - Parent GPE Device
690 *              GpeNumber       - GPE level within the GPE block
691 *              Flags           - Called from an ISR or not
692 *              EventStatus     - Where the current status of the event will
693 *                                be returned
694 *
695 * RETURN:      Status
696 *
697 * DESCRIPTION: Get status of an event (general purpose)
698 *
699 ******************************************************************************/
700
701ACPI_STATUS
702AcpiGetGpeStatus (
703    ACPI_HANDLE             GpeDevice,
704    UINT32                  GpeNumber,
705    UINT32                  Flags,
706    ACPI_EVENT_STATUS       *EventStatus)
707{
708    ACPI_STATUS             Status = AE_OK;
709    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
710
711
712    ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
713
714
715    /* Use semaphore lock if not executing at interrupt level */
716
717    if (Flags & ACPI_NOT_ISR)
718    {
719        Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
720        if (ACPI_FAILURE (Status))
721        {
722            return_ACPI_STATUS (Status);
723        }
724    }
725
726    /* Ensure that we have a valid GPE number */
727
728    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
729    if (!GpeEventInfo)
730    {
731        Status = AE_BAD_PARAMETER;
732        goto UnlockAndExit;
733    }
734
735    /* Obtain status on the requested GPE number */
736
737    Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus);
738
739UnlockAndExit:
740    if (Flags & ACPI_NOT_ISR)
741    {
742        (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
743    }
744    return_ACPI_STATUS (Status);
745}
746
747ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
748
749
750/*******************************************************************************
751 *
752 * FUNCTION:    AcpiInstallGpeBlock
753 *
754 * PARAMETERS:  GpeDevice           - Handle to the parent GPE Block Device
755 *              GpeBlockAddress     - Address and SpaceID
756 *              RegisterCount       - Number of GPE register pairs in the block
757 *              InterruptNumber     - H/W interrupt for the block
758 *
759 * RETURN:      Status
760 *
761 * DESCRIPTION: Create and Install a block of GPE registers
762 *
763 ******************************************************************************/
764
765ACPI_STATUS
766AcpiInstallGpeBlock (
767    ACPI_HANDLE             GpeDevice,
768    ACPI_GENERIC_ADDRESS    *GpeBlockAddress,
769    UINT32                  RegisterCount,
770    UINT32                  InterruptNumber)
771{
772    ACPI_STATUS             Status;
773    ACPI_OPERAND_OBJECT     *ObjDesc;
774    ACPI_NAMESPACE_NODE     *Node;
775    ACPI_GPE_BLOCK_INFO     *GpeBlock;
776
777
778    ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock);
779
780
781    if ((!GpeDevice)       ||
782        (!GpeBlockAddress) ||
783        (!RegisterCount))
784    {
785        return_ACPI_STATUS (AE_BAD_PARAMETER);
786    }
787
788    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
789    if (ACPI_FAILURE (Status))
790    {
791        return (Status);
792    }
793
794    Node = AcpiNsMapHandleToNode (GpeDevice);
795    if (!Node)
796    {
797        Status = AE_BAD_PARAMETER;
798        goto UnlockAndExit;
799    }
800
801    /*
802     * For user-installed GPE Block Devices, the GpeBlockBaseNumber
803     * is always zero
804     */
805    Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress, RegisterCount,
806                    0, InterruptNumber, &GpeBlock);
807    if (ACPI_FAILURE (Status))
808    {
809        goto UnlockAndExit;
810    }
811
812    /* Run the _PRW methods and enable the GPEs */
813
814    Status = AcpiEvInitializeGpeBlock (Node, GpeBlock);
815    if (ACPI_FAILURE (Status))
816    {
817        goto UnlockAndExit;
818    }
819
820    /* Get the DeviceObject attached to the node */
821
822    ObjDesc = AcpiNsGetAttachedObject (Node);
823    if (!ObjDesc)
824    {
825        /* No object, create a new one */
826
827        ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE);
828        if (!ObjDesc)
829        {
830            Status = AE_NO_MEMORY;
831            goto UnlockAndExit;
832        }
833
834        Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE);
835
836        /* Remove local reference to the object */
837
838        AcpiUtRemoveReference (ObjDesc);
839
840        if (ACPI_FAILURE (Status))
841        {
842            goto UnlockAndExit;
843        }
844    }
845
846    /* Install the GPE block in the DeviceObject */
847
848    ObjDesc->Device.GpeBlock = GpeBlock;
849
850
851UnlockAndExit:
852    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
853    return_ACPI_STATUS (Status);
854}
855
856ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock)
857
858
859/*******************************************************************************
860 *
861 * FUNCTION:    AcpiRemoveGpeBlock
862 *
863 * PARAMETERS:  GpeDevice           - Handle to the parent GPE Block Device
864 *
865 * RETURN:      Status
866 *
867 * DESCRIPTION: Remove a previously installed block of GPE registers
868 *
869 ******************************************************************************/
870
871ACPI_STATUS
872AcpiRemoveGpeBlock (
873    ACPI_HANDLE             GpeDevice)
874{
875    ACPI_OPERAND_OBJECT     *ObjDesc;
876    ACPI_STATUS             Status;
877    ACPI_NAMESPACE_NODE     *Node;
878
879
880    ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock);
881
882
883    if (!GpeDevice)
884    {
885        return_ACPI_STATUS (AE_BAD_PARAMETER);
886    }
887
888    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
889    if (ACPI_FAILURE (Status))
890    {
891        return (Status);
892    }
893
894    Node = AcpiNsMapHandleToNode (GpeDevice);
895    if (!Node)
896    {
897        Status = AE_BAD_PARAMETER;
898        goto UnlockAndExit;
899    }
900
901    /* Get the DeviceObject attached to the node */
902
903    ObjDesc = AcpiNsGetAttachedObject (Node);
904    if (!ObjDesc ||
905        !ObjDesc->Device.GpeBlock)
906    {
907        return_ACPI_STATUS (AE_NULL_OBJECT);
908    }
909
910    /* Delete the GPE block (but not the DeviceObject) */
911
912    Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock);
913    if (ACPI_SUCCESS (Status))
914    {
915        ObjDesc->Device.GpeBlock = NULL;
916    }
917
918UnlockAndExit:
919    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
920    return_ACPI_STATUS (Status);
921}
922
923ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock)
924
925