evxfevnt.c revision 193529 
1/******************************************************************************
2 *
3 * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
4 *
5 *****************************************************************************/
6
7/******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights.  You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code.  No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision.  In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change.  Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee.  Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution.  In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government.  In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************/
115
116
117#define __EVXFEVNT_C__
118
119#include <contrib/dev/acpica/include/acpi.h>
120#include <contrib/dev/acpica/include/accommon.h>
121#include <contrib/dev/acpica/include/acevents.h>
122#include <contrib/dev/acpica/include/acnamesp.h>
123#include <contrib/dev/acpica/include/actables.h>
124
125#define _COMPONENT          ACPI_EVENTS
126        ACPI_MODULE_NAME    ("evxfevnt")
127
128/* Local prototypes */
129
130static ACPI_STATUS
131AcpiEvGetGpeDevice (
132    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
133    ACPI_GPE_BLOCK_INFO     *GpeBlock,
134    void                    *Context);
135
136
137/*******************************************************************************
138 *
139 * FUNCTION:    AcpiEnable
140 *
141 * PARAMETERS:  None
142 *
143 * RETURN:      Status
144 *
145 * DESCRIPTION: Transfers the system into ACPI mode.
146 *
147 ******************************************************************************/
148
149ACPI_STATUS
150AcpiEnable (
151    void)
152{
153    ACPI_STATUS             Status = AE_OK;
154
155
156    ACPI_FUNCTION_TRACE (AcpiEnable);
157
158
159    /* ACPI tables must be present */
160
161    if (!AcpiTbTablesLoaded ())
162    {
163        return_ACPI_STATUS (AE_NO_ACPI_TABLES);
164    }
165
166    /* Check current mode */
167
168    if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
169    {
170        ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
171    }
172    else
173    {
174        /* Transition to ACPI mode */
175
176        Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
177        if (ACPI_FAILURE (Status))
178        {
179            ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode"));
180            return_ACPI_STATUS (Status);
181        }
182
183        ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
184            "Transition to ACPI mode successful\n"));
185    }
186
187    return_ACPI_STATUS (Status);
188}
189
190ACPI_EXPORT_SYMBOL (AcpiEnable)
191
192
193/*******************************************************************************
194 *
195 * FUNCTION:    AcpiDisable
196 *
197 * PARAMETERS:  None
198 *
199 * RETURN:      Status
200 *
201 * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
202 *
203 ******************************************************************************/
204
205ACPI_STATUS
206AcpiDisable (
207    void)
208{
209    ACPI_STATUS             Status = AE_OK;
210
211
212    ACPI_FUNCTION_TRACE (AcpiDisable);
213
214
215    if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
216    {
217        ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
218            "System is already in legacy (non-ACPI) mode\n"));
219    }
220    else
221    {
222        /* Transition to LEGACY mode */
223
224        Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
225
226        if (ACPI_FAILURE (Status))
227        {
228            ACPI_ERROR ((AE_INFO,
229                "Could not exit ACPI mode to legacy mode"));
230            return_ACPI_STATUS (Status);
231        }
232
233        ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
234    }
235
236    return_ACPI_STATUS (Status);
237}
238
239ACPI_EXPORT_SYMBOL (AcpiDisable)
240
241
242/*******************************************************************************
243 *
244 * FUNCTION:    AcpiEnableEvent
245 *
246 * PARAMETERS:  Event           - The fixed eventto be enabled
247 *              Flags           - Reserved
248 *
249 * RETURN:      Status
250 *
251 * DESCRIPTION: Enable an ACPI event (fixed)
252 *
253 ******************************************************************************/
254
255ACPI_STATUS
256AcpiEnableEvent (
257    UINT32                  Event,
258    UINT32                  Flags)
259{
260    ACPI_STATUS             Status = AE_OK;
261    UINT32                  Value;
262
263
264    ACPI_FUNCTION_TRACE (AcpiEnableEvent);
265
266
267    /* Decode the Fixed Event */
268
269    if (Event > ACPI_EVENT_MAX)
270    {
271        return_ACPI_STATUS (AE_BAD_PARAMETER);
272    }
273
274    /*
275     * Enable the requested fixed event (by writing a one to the enable
276     * register bit)
277     */
278    Status = AcpiWriteBitRegister (
279                AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
280                ACPI_ENABLE_EVENT);
281    if (ACPI_FAILURE (Status))
282    {
283        return_ACPI_STATUS (Status);
284    }
285
286    /* Make sure that the hardware responded */
287
288    Status = AcpiReadBitRegister (
289                AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value);
290    if (ACPI_FAILURE (Status))
291    {
292        return_ACPI_STATUS (Status);
293    }
294
295    if (Value != 1)
296    {
297        ACPI_ERROR ((AE_INFO,
298            "Could not enable %s event", AcpiUtGetEventName (Event)));
299        return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
300    }
301
302    return_ACPI_STATUS (Status);
303}
304
305ACPI_EXPORT_SYMBOL (AcpiEnableEvent)
306
307
308/*******************************************************************************
309 *
310 * FUNCTION:    AcpiSetGpeType
311 *
312 * PARAMETERS:  GpeDevice       - Parent GPE Device
313 *              GpeNumber       - GPE level within the GPE block
314 *              Type            - New GPE type
315 *
316 * RETURN:      Status
317 *
318 * DESCRIPTION: Set the type of an individual GPE
319 *
320 ******************************************************************************/
321
322ACPI_STATUS
323AcpiSetGpeType (
324    ACPI_HANDLE             GpeDevice,
325    UINT32                  GpeNumber,
326    UINT8                   Type)
327{
328    ACPI_STATUS             Status = AE_OK;
329    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
330
331
332    ACPI_FUNCTION_TRACE (AcpiSetGpeType);
333
334
335    /* Ensure that we have a valid GPE number */
336
337    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
338    if (!GpeEventInfo)
339    {
340        Status = AE_BAD_PARAMETER;
341        goto UnlockAndExit;
342    }
343
344    if ((GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) == Type)
345    {
346        return_ACPI_STATUS (AE_OK);
347    }
348
349    /* Set the new type (will disable GPE if currently enabled) */
350
351    Status = AcpiEvSetGpeType (GpeEventInfo, Type);
352
353UnlockAndExit:
354    return_ACPI_STATUS (Status);
355}
356
357ACPI_EXPORT_SYMBOL (AcpiSetGpeType)
358
359
360/*******************************************************************************
361 *
362 * FUNCTION:    AcpiEnableGpe
363 *
364 * PARAMETERS:  GpeDevice       - Parent GPE Device
365 *              GpeNumber       - GPE level within the GPE block
366 *              Flags           - Just enable, or also wake enable?
367 *                                Called from ISR or not
368 *
369 * RETURN:      Status
370 *
371 * DESCRIPTION: Enable an ACPI event (general purpose)
372 *
373 ******************************************************************************/
374
375ACPI_STATUS
376AcpiEnableGpe (
377    ACPI_HANDLE             GpeDevice,
378    UINT32                  GpeNumber,
379    UINT32                  Flags)
380{
381    ACPI_STATUS             Status = AE_OK;
382    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
383
384
385    ACPI_FUNCTION_TRACE (AcpiEnableGpe);
386
387
388    /* Use semaphore lock if not executing at interrupt level */
389
390    if (Flags & ACPI_NOT_ISR)
391    {
392        Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
393        if (ACPI_FAILURE (Status))
394        {
395            return_ACPI_STATUS (Status);
396        }
397    }
398
399    /* Ensure that we have a valid GPE number */
400
401    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
402    if (!GpeEventInfo)
403    {
404        Status = AE_BAD_PARAMETER;
405        goto UnlockAndExit;
406    }
407
408    /* Perform the enable */
409
410    Status = AcpiEvEnableGpe (GpeEventInfo, TRUE);
411
412UnlockAndExit:
413    if (Flags & ACPI_NOT_ISR)
414    {
415        (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
416    }
417    return_ACPI_STATUS (Status);
418}
419
420ACPI_EXPORT_SYMBOL (AcpiEnableGpe)
421
422
423/*******************************************************************************
424 *
425 * FUNCTION:    AcpiDisableGpe
426 *
427 * PARAMETERS:  GpeDevice       - Parent GPE Device
428 *              GpeNumber       - GPE level within the GPE block
429 *              Flags           - Just disable, or also wake disable?
430 *                                Called from ISR or not
431 *
432 * RETURN:      Status
433 *
434 * DESCRIPTION: Disable an ACPI event (general purpose)
435 *
436 ******************************************************************************/
437
438ACPI_STATUS
439AcpiDisableGpe (
440    ACPI_HANDLE             GpeDevice,
441    UINT32                  GpeNumber,
442    UINT32                  Flags)
443{
444    ACPI_STATUS             Status = AE_OK;
445    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
446
447
448    ACPI_FUNCTION_TRACE (AcpiDisableGpe);
449
450
451    /* Use semaphore lock if not executing at interrupt level */
452
453    if (Flags & ACPI_NOT_ISR)
454    {
455        Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
456        if (ACPI_FAILURE (Status))
457        {
458            return_ACPI_STATUS (Status);
459        }
460    }
461
462    /* Ensure that we have a valid GPE number */
463
464    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
465    if (!GpeEventInfo)
466    {
467        Status = AE_BAD_PARAMETER;
468        goto UnlockAndExit;
469    }
470
471    Status = AcpiEvDisableGpe (GpeEventInfo);
472
473UnlockAndExit:
474    if (Flags & ACPI_NOT_ISR)
475    {
476        (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
477    }
478    return_ACPI_STATUS (Status);
479}
480
481ACPI_EXPORT_SYMBOL (AcpiDisableGpe)
482
483
484/*******************************************************************************
485 *
486 * FUNCTION:    AcpiDisableEvent
487 *
488 * PARAMETERS:  Event           - The fixed eventto be enabled
489 *              Flags           - Reserved
490 *
491 * RETURN:      Status
492 *
493 * DESCRIPTION: Disable an ACPI event (fixed)
494 *
495 ******************************************************************************/
496
497ACPI_STATUS
498AcpiDisableEvent (
499    UINT32                  Event,
500    UINT32                  Flags)
501{
502    ACPI_STATUS             Status = AE_OK;
503    UINT32                  Value;
504
505
506    ACPI_FUNCTION_TRACE (AcpiDisableEvent);
507
508
509    /* Decode the Fixed Event */
510
511    if (Event > ACPI_EVENT_MAX)
512    {
513        return_ACPI_STATUS (AE_BAD_PARAMETER);
514    }
515
516    /*
517     * Disable the requested fixed event (by writing a zero to the enable
518     * register bit)
519     */
520    Status = AcpiWriteBitRegister (
521                AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
522                ACPI_DISABLE_EVENT);
523    if (ACPI_FAILURE (Status))
524    {
525        return_ACPI_STATUS (Status);
526    }
527
528    Status = AcpiReadBitRegister (
529                AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value);
530    if (ACPI_FAILURE (Status))
531    {
532        return_ACPI_STATUS (Status);
533    }
534
535    if (Value != 0)
536    {
537        ACPI_ERROR ((AE_INFO,
538            "Could not disable %s events", AcpiUtGetEventName (Event)));
539        return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
540    }
541
542    return_ACPI_STATUS (Status);
543}
544
545ACPI_EXPORT_SYMBOL (AcpiDisableEvent)
546
547
548/*******************************************************************************
549 *
550 * FUNCTION:    AcpiClearEvent
551 *
552 * PARAMETERS:  Event           - The fixed event to be cleared
553 *
554 * RETURN:      Status
555 *
556 * DESCRIPTION: Clear an ACPI event (fixed)
557 *
558 ******************************************************************************/
559
560ACPI_STATUS
561AcpiClearEvent (
562    UINT32                  Event)
563{
564    ACPI_STATUS             Status = AE_OK;
565
566
567    ACPI_FUNCTION_TRACE (AcpiClearEvent);
568
569
570    /* Decode the Fixed Event */
571
572    if (Event > ACPI_EVENT_MAX)
573    {
574        return_ACPI_STATUS (AE_BAD_PARAMETER);
575    }
576
577    /*
578     * Clear the requested fixed event (By writing a one to the status
579     * register bit)
580     */
581    Status = AcpiWriteBitRegister (
582                AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
583                ACPI_CLEAR_STATUS);
584
585    return_ACPI_STATUS (Status);
586}
587
588ACPI_EXPORT_SYMBOL (AcpiClearEvent)
589
590
591/*******************************************************************************
592 *
593 * FUNCTION:    AcpiClearGpe
594 *
595 * PARAMETERS:  GpeDevice       - Parent GPE Device
596 *              GpeNumber       - GPE level within the GPE block
597 *              Flags           - Called from an ISR or not
598 *
599 * RETURN:      Status
600 *
601 * DESCRIPTION: Clear an ACPI event (general purpose)
602 *
603 ******************************************************************************/
604
605ACPI_STATUS
606AcpiClearGpe (
607    ACPI_HANDLE             GpeDevice,
608    UINT32                  GpeNumber,
609    UINT32                  Flags)
610{
611    ACPI_STATUS             Status = AE_OK;
612    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
613
614
615    ACPI_FUNCTION_TRACE (AcpiClearGpe);
616
617
618    /* Use semaphore lock if not executing at interrupt level */
619
620    if (Flags & ACPI_NOT_ISR)
621    {
622        Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
623        if (ACPI_FAILURE (Status))
624        {
625            return_ACPI_STATUS (Status);
626        }
627    }
628
629    /* Ensure that we have a valid GPE number */
630
631    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
632    if (!GpeEventInfo)
633    {
634        Status = AE_BAD_PARAMETER;
635        goto UnlockAndExit;
636    }
637
638    Status = AcpiHwClearGpe (GpeEventInfo);
639
640UnlockAndExit:
641    if (Flags & ACPI_NOT_ISR)
642    {
643        (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
644    }
645    return_ACPI_STATUS (Status);
646}
647
648ACPI_EXPORT_SYMBOL (AcpiClearGpe)
649
650
651/*******************************************************************************
652 *
653 * FUNCTION:    AcpiGetEventStatus
654 *
655 * PARAMETERS:  Event           - The fixed event
656 *              EventStatus     - Where the current status of the event will
657 *                                be returned
658 *
659 * RETURN:      Status
660 *
661 * DESCRIPTION: Obtains and returns the current status of the event
662 *
663 ******************************************************************************/
664
665ACPI_STATUS
666AcpiGetEventStatus (
667    UINT32                  Event,
668    ACPI_EVENT_STATUS       *EventStatus)
669{
670    ACPI_STATUS             Status = AE_OK;
671
672
673    ACPI_FUNCTION_TRACE (AcpiGetEventStatus);
674
675
676    if (!EventStatus)
677    {
678        return_ACPI_STATUS (AE_BAD_PARAMETER);
679    }
680
681    /* Decode the Fixed Event */
682
683    if (Event > ACPI_EVENT_MAX)
684    {
685        return_ACPI_STATUS (AE_BAD_PARAMETER);
686    }
687
688    /* Get the status of the requested fixed event */
689
690    Status = AcpiReadBitRegister (
691                AcpiGbl_FixedEventInfo[Event].StatusRegisterId, EventStatus);
692
693    return_ACPI_STATUS (Status);
694}
695
696ACPI_EXPORT_SYMBOL (AcpiGetEventStatus)
697
698
699/*******************************************************************************
700 *
701 * FUNCTION:    AcpiGetGpeStatus
702 *
703 * PARAMETERS:  GpeDevice       - Parent GPE Device
704 *              GpeNumber       - GPE level within the GPE block
705 *              Flags           - Called from an ISR or not
706 *              EventStatus     - Where the current status of the event will
707 *                                be returned
708 *
709 * RETURN:      Status
710 *
711 * DESCRIPTION: Get status of an event (general purpose)
712 *
713 ******************************************************************************/
714
715ACPI_STATUS
716AcpiGetGpeStatus (
717    ACPI_HANDLE             GpeDevice,
718    UINT32                  GpeNumber,
719    UINT32                  Flags,
720    ACPI_EVENT_STATUS       *EventStatus)
721{
722    ACPI_STATUS             Status = AE_OK;
723    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
724
725
726    ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
727
728
729    /* Use semaphore lock if not executing at interrupt level */
730
731    if (Flags & ACPI_NOT_ISR)
732    {
733        Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
734        if (ACPI_FAILURE (Status))
735        {
736            return_ACPI_STATUS (Status);
737        }
738    }
739
740    /* Ensure that we have a valid GPE number */
741
742    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
743    if (!GpeEventInfo)
744    {
745        Status = AE_BAD_PARAMETER;
746        goto UnlockAndExit;
747    }
748
749    /* Obtain status on the requested GPE number */
750
751    Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus);
752
753UnlockAndExit:
754    if (Flags & ACPI_NOT_ISR)
755    {
756        (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
757    }
758    return_ACPI_STATUS (Status);
759}
760
761ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
762
763
764/*******************************************************************************
765 *
766 * FUNCTION:    AcpiInstallGpeBlock
767 *
768 * PARAMETERS:  GpeDevice           - Handle to the parent GPE Block Device
769 *              GpeBlockAddress     - Address and SpaceID
770 *              RegisterCount       - Number of GPE register pairs in the block
771 *              InterruptNumber     - H/W interrupt for the block
772 *
773 * RETURN:      Status
774 *
775 * DESCRIPTION: Create and Install a block of GPE registers
776 *
777 ******************************************************************************/
778
779ACPI_STATUS
780AcpiInstallGpeBlock (
781    ACPI_HANDLE             GpeDevice,
782    ACPI_GENERIC_ADDRESS    *GpeBlockAddress,
783    UINT32                  RegisterCount,
784    UINT32                  InterruptNumber)
785{
786    ACPI_STATUS             Status;
787    ACPI_OPERAND_OBJECT     *ObjDesc;
788    ACPI_NAMESPACE_NODE     *Node;
789    ACPI_GPE_BLOCK_INFO     *GpeBlock;
790
791
792    ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock);
793
794
795    if ((!GpeDevice)       ||
796        (!GpeBlockAddress) ||
797        (!RegisterCount))
798    {
799        return_ACPI_STATUS (AE_BAD_PARAMETER);
800    }
801
802    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
803    if (ACPI_FAILURE (Status))
804    {
805        return (Status);
806    }
807
808    Node = AcpiNsMapHandleToNode (GpeDevice);
809    if (!Node)
810    {
811        Status = AE_BAD_PARAMETER;
812        goto UnlockAndExit;
813    }
814
815    /*
816     * For user-installed GPE Block Devices, the GpeBlockBaseNumber
817     * is always zero
818     */
819    Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress, RegisterCount,
820                0, InterruptNumber, &GpeBlock);
821    if (ACPI_FAILURE (Status))
822    {
823        goto UnlockAndExit;
824    }
825
826    /* Run the _PRW methods and enable the GPEs */
827
828    Status = AcpiEvInitializeGpeBlock (Node, GpeBlock);
829    if (ACPI_FAILURE (Status))
830    {
831        goto UnlockAndExit;
832    }
833
834    /* Get the DeviceObject attached to the node */
835
836    ObjDesc = AcpiNsGetAttachedObject (Node);
837    if (!ObjDesc)
838    {
839        /* No object, create a new one */
840
841        ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE);
842        if (!ObjDesc)
843        {
844            Status = AE_NO_MEMORY;
845            goto UnlockAndExit;
846        }
847
848        Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE);
849
850        /* Remove local reference to the object */
851
852        AcpiUtRemoveReference (ObjDesc);
853
854        if (ACPI_FAILURE (Status))
855        {
856            goto UnlockAndExit;
857        }
858    }
859
860    /* Install the GPE block in the DeviceObject */
861
862    ObjDesc->Device.GpeBlock = GpeBlock;
863
864
865UnlockAndExit:
866    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
867    return_ACPI_STATUS (Status);
868}
869
870ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock)
871
872
873/*******************************************************************************
874 *
875 * FUNCTION:    AcpiRemoveGpeBlock
876 *
877 * PARAMETERS:  GpeDevice           - Handle to the parent GPE Block Device
878 *
879 * RETURN:      Status
880 *
881 * DESCRIPTION: Remove a previously installed block of GPE registers
882 *
883 ******************************************************************************/
884
885ACPI_STATUS
886AcpiRemoveGpeBlock (
887    ACPI_HANDLE             GpeDevice)
888{
889    ACPI_OPERAND_OBJECT     *ObjDesc;
890    ACPI_STATUS             Status;
891    ACPI_NAMESPACE_NODE     *Node;
892
893
894    ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock);
895
896
897    if (!GpeDevice)
898    {
899        return_ACPI_STATUS (AE_BAD_PARAMETER);
900    }
901
902    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
903    if (ACPI_FAILURE (Status))
904    {
905        return (Status);
906    }
907
908    Node = AcpiNsMapHandleToNode (GpeDevice);
909    if (!Node)
910    {
911        Status = AE_BAD_PARAMETER;
912        goto UnlockAndExit;
913    }
914
915    /* Get the DeviceObject attached to the node */
916
917    ObjDesc = AcpiNsGetAttachedObject (Node);
918    if (!ObjDesc ||
919        !ObjDesc->Device.GpeBlock)
920    {
921        return_ACPI_STATUS (AE_NULL_OBJECT);
922    }
923
924    /* Delete the GPE block (but not the DeviceObject) */
925
926    Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock);
927    if (ACPI_SUCCESS (Status))
928    {
929        ObjDesc->Device.GpeBlock = NULL;
930    }
931
932UnlockAndExit:
933    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
934    return_ACPI_STATUS (Status);
935}
936
937ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock)
938
939
940/*******************************************************************************
941 *
942 * FUNCTION:    AcpiGetGpeDevice
943 *
944 * PARAMETERS:  Index               - System GPE index (0-CurrentGpeCount)
945 *              GpeDevice           - Where the parent GPE Device is returned
946 *
947 * RETURN:      Status
948 *
949 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
950 *              gpe device indicates that the gpe number is contained in one of
951 *              the FADT-defined gpe blocks. Otherwise, the GPE block device.
952 *
953 ******************************************************************************/
954
955ACPI_STATUS
956AcpiGetGpeDevice (
957    UINT32                  Index,
958    ACPI_HANDLE             *GpeDevice)
959{
960    ACPI_GPE_DEVICE_INFO    Info;
961    ACPI_STATUS             Status;
962
963
964    ACPI_FUNCTION_TRACE (AcpiGetGpeDevice);
965
966
967    if (!GpeDevice)
968    {
969        return_ACPI_STATUS (AE_BAD_PARAMETER);
970    }
971
972    if (Index >= AcpiCurrentGpeCount)
973    {
974        return_ACPI_STATUS (AE_NOT_EXIST);
975    }
976
977    /* Setup and walk the GPE list */
978
979    Info.Index = Index;
980    Info.Status = AE_NOT_EXIST;
981    Info.GpeDevice = NULL;
982    Info.NextBlockBaseIndex = 0;
983
984    Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info);
985    if (ACPI_FAILURE (Status))
986    {
987        return_ACPI_STATUS (Status);
988    }
989
990    *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice);
991    return_ACPI_STATUS (Info.Status);
992}
993
994ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice)
995
996
997/*******************************************************************************
998 *
999 * FUNCTION:    AcpiEvGetGpeDevice
1000 *
1001 * PARAMETERS:  GPE_WALK_CALLBACK
1002 *
1003 * RETURN:      Status
1004 *
1005 * DESCRIPTION: Matches the input GPE index (0-CurrentGpeCount) with a GPE
1006 *              block device. NULL if the GPE is one of the FADT-defined GPEs.
1007 *
1008 ******************************************************************************/
1009
1010static ACPI_STATUS
1011AcpiEvGetGpeDevice (
1012    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
1013    ACPI_GPE_BLOCK_INFO     *GpeBlock,
1014    void                    *Context)
1015{
1016    ACPI_GPE_DEVICE_INFO    *Info = Context;
1017
1018
1019    /* Increment Index by the number of GPEs in this block */
1020
1021    Info->NextBlockBaseIndex +=
1022        (GpeBlock->RegisterCount * ACPI_GPE_REGISTER_WIDTH);
1023
1024    if (Info->Index < Info->NextBlockBaseIndex)
1025    {
1026        /*
1027         * The GPE index is within this block, get the node. Leave the node
1028         * NULL for the FADT-defined GPEs
1029         */
1030        if ((GpeBlock->Node)->Type == ACPI_TYPE_DEVICE)
1031        {
1032            Info->GpeDevice = GpeBlock->Node;
1033        }
1034
1035        Info->Status = AE_OK;
1036        return (AE_CTRL_END);
1037    }
1038
1039    return (AE_OK);
1040}
1041
1042
1043/******************************************************************************
1044 *
1045 * FUNCTION:    AcpiDisableAllGpes
1046 *
1047 * PARAMETERS:  None
1048 *
1049 * RETURN:      Status
1050 *
1051 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
1052 *
1053 ******************************************************************************/
1054
1055ACPI_STATUS
1056AcpiDisableAllGpes (
1057    void)
1058{
1059    ACPI_STATUS             Status;
1060
1061
1062    ACPI_FUNCTION_TRACE (AcpiDisableAllGpes);
1063
1064
1065    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
1066    if (ACPI_FAILURE (Status))
1067    {
1068        return_ACPI_STATUS (Status);
1069    }
1070
1071    Status = AcpiHwDisableAllGpes ();
1072    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
1073
1074    return_ACPI_STATUS (Status);
1075}
1076
1077
1078/******************************************************************************
1079 *
1080 * FUNCTION:    AcpiEnableAllRuntimeGpes
1081 *
1082 * PARAMETERS:  None
1083 *
1084 * RETURN:      Status
1085 *
1086 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
1087 *
1088 ******************************************************************************/
1089
1090ACPI_STATUS
1091AcpiEnableAllRuntimeGpes (
1092    void)
1093{
1094    ACPI_STATUS             Status;
1095
1096
1097    ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes);
1098
1099
1100    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
1101    if (ACPI_FAILURE (Status))
1102    {
1103        return_ACPI_STATUS (Status);
1104    }
1105
1106    Status = AcpiHwEnableAllRuntimeGpes ();
1107    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
1108
1109    return_ACPI_STATUS (Status);
1110}
1111
1112
1113