1 /******************************************************************************
3 * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2014, Intel Corp.
12 * All rights reserved.
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
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
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;
37 * The above copyright and patent license is granted only if the following
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.
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
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
72 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
80 * 4. Disclaimer and Export Compliance
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
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
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.
114 *****************************************************************************/
116 #define EXPORT_ACPI_INTERFACES
119 #include "accommon.h"
120 #include "actables.h"
122 #define _COMPONENT ACPI_EVENTS
123 ACPI_MODULE_NAME ("evxfevnt")
126 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
127 /*******************************************************************************
129 * FUNCTION: AcpiEnable
135 * DESCRIPTION: Transfers the system into ACPI mode.
137 ******************************************************************************/
143 ACPI_STATUS Status
= AE_OK
;
146 ACPI_FUNCTION_TRACE (AcpiEnable
);
149 /* ACPI tables must be present */
151 if (!AcpiTbTablesLoaded ())
153 return_ACPI_STATUS (AE_NO_ACPI_TABLES
);
156 /* If the Hardware Reduced flag is set, machine is always in acpi mode */
158 if (AcpiGbl_ReducedHardware
)
160 return_ACPI_STATUS (AE_OK
);
163 /* Check current mode */
165 if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI
)
167 ACPI_DEBUG_PRINT ((ACPI_DB_INIT
, "System is already in ACPI mode\n"));
171 /* Transition to ACPI mode */
173 Status
= AcpiHwSetMode (ACPI_SYS_MODE_ACPI
);
174 if (ACPI_FAILURE (Status
))
176 ACPI_ERROR ((AE_INFO
, "Could not transition to ACPI mode"));
177 return_ACPI_STATUS (Status
);
180 ACPI_DEBUG_PRINT ((ACPI_DB_INIT
,
181 "Transition to ACPI mode successful\n"));
184 return_ACPI_STATUS (Status
);
187 ACPI_EXPORT_SYMBOL (AcpiEnable
)
190 /*******************************************************************************
192 * FUNCTION: AcpiDisable
198 * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
200 ******************************************************************************/
206 ACPI_STATUS Status
= AE_OK
;
209 ACPI_FUNCTION_TRACE (AcpiDisable
);
212 /* If the Hardware Reduced flag is set, machine is always in acpi mode */
214 if (AcpiGbl_ReducedHardware
)
216 return_ACPI_STATUS (AE_OK
);
219 if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY
)
221 ACPI_DEBUG_PRINT ((ACPI_DB_INIT
,
222 "System is already in legacy (non-ACPI) mode\n"));
226 /* Transition to LEGACY mode */
228 Status
= AcpiHwSetMode (ACPI_SYS_MODE_LEGACY
);
230 if (ACPI_FAILURE (Status
))
232 ACPI_ERROR ((AE_INFO
,
233 "Could not exit ACPI mode to legacy mode"));
234 return_ACPI_STATUS (Status
);
237 ACPI_DEBUG_PRINT ((ACPI_DB_INIT
, "ACPI mode disabled\n"));
240 return_ACPI_STATUS (Status
);
243 ACPI_EXPORT_SYMBOL (AcpiDisable
)
246 /*******************************************************************************
248 * FUNCTION: AcpiEnableEvent
250 * PARAMETERS: Event - The fixed eventto be enabled
255 * DESCRIPTION: Enable an ACPI event (fixed)
257 ******************************************************************************/
264 ACPI_STATUS Status
= AE_OK
;
268 ACPI_FUNCTION_TRACE (AcpiEnableEvent
);
271 /* Decode the Fixed Event */
273 if (Event
> ACPI_EVENT_MAX
)
275 return_ACPI_STATUS (AE_BAD_PARAMETER
);
279 * Enable the requested fixed event (by writing a one to the enable
282 Status
= AcpiWriteBitRegister (
283 AcpiGbl_FixedEventInfo
[Event
].EnableRegisterId
,
285 if (ACPI_FAILURE (Status
))
287 return_ACPI_STATUS (Status
);
290 /* Make sure that the hardware responded */
292 Status
= AcpiReadBitRegister (
293 AcpiGbl_FixedEventInfo
[Event
].EnableRegisterId
, &Value
);
294 if (ACPI_FAILURE (Status
))
296 return_ACPI_STATUS (Status
);
301 ACPI_ERROR ((AE_INFO
,
302 "Could not enable %s event", AcpiUtGetEventName (Event
)));
303 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE
);
306 return_ACPI_STATUS (Status
);
309 ACPI_EXPORT_SYMBOL (AcpiEnableEvent
)
312 /*******************************************************************************
314 * FUNCTION: AcpiDisableEvent
316 * PARAMETERS: Event - The fixed event to be disabled
321 * DESCRIPTION: Disable an ACPI event (fixed)
323 ******************************************************************************/
330 ACPI_STATUS Status
= AE_OK
;
334 ACPI_FUNCTION_TRACE (AcpiDisableEvent
);
337 /* Decode the Fixed Event */
339 if (Event
> ACPI_EVENT_MAX
)
341 return_ACPI_STATUS (AE_BAD_PARAMETER
);
345 * Disable the requested fixed event (by writing a zero to the enable
348 Status
= AcpiWriteBitRegister (
349 AcpiGbl_FixedEventInfo
[Event
].EnableRegisterId
,
351 if (ACPI_FAILURE (Status
))
353 return_ACPI_STATUS (Status
);
356 Status
= AcpiReadBitRegister (
357 AcpiGbl_FixedEventInfo
[Event
].EnableRegisterId
, &Value
);
358 if (ACPI_FAILURE (Status
))
360 return_ACPI_STATUS (Status
);
365 ACPI_ERROR ((AE_INFO
,
366 "Could not disable %s events", AcpiUtGetEventName (Event
)));
367 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE
);
370 return_ACPI_STATUS (Status
);
373 ACPI_EXPORT_SYMBOL (AcpiDisableEvent
)
376 /*******************************************************************************
378 * FUNCTION: AcpiClearEvent
380 * PARAMETERS: Event - The fixed event to be cleared
384 * DESCRIPTION: Clear an ACPI event (fixed)
386 ******************************************************************************/
392 ACPI_STATUS Status
= AE_OK
;
395 ACPI_FUNCTION_TRACE (AcpiClearEvent
);
398 /* Decode the Fixed Event */
400 if (Event
> ACPI_EVENT_MAX
)
402 return_ACPI_STATUS (AE_BAD_PARAMETER
);
406 * Clear the requested fixed event (By writing a one to the status
409 Status
= AcpiWriteBitRegister (
410 AcpiGbl_FixedEventInfo
[Event
].StatusRegisterId
,
413 return_ACPI_STATUS (Status
);
416 ACPI_EXPORT_SYMBOL (AcpiClearEvent
)
419 /*******************************************************************************
421 * FUNCTION: AcpiGetEventStatus
423 * PARAMETERS: Event - The fixed event
424 * EventStatus - Where the current status of the event will
429 * DESCRIPTION: Obtains and returns the current status of the event
431 ******************************************************************************/
436 ACPI_EVENT_STATUS
*EventStatus
)
439 ACPI_EVENT_STATUS LocalEventStatus
= 0;
443 ACPI_FUNCTION_TRACE (AcpiGetEventStatus
);
448 return_ACPI_STATUS (AE_BAD_PARAMETER
);
451 /* Decode the Fixed Event */
453 if (Event
> ACPI_EVENT_MAX
)
455 return_ACPI_STATUS (AE_BAD_PARAMETER
);
458 /* Fixed event currently can be dispatched? */
460 if (AcpiGbl_FixedEventHandlers
[Event
].Handler
)
462 LocalEventStatus
|= ACPI_EVENT_FLAG_HAS_HANDLER
;
465 /* Fixed event currently enabled? */
467 Status
= AcpiReadBitRegister (
468 AcpiGbl_FixedEventInfo
[Event
].EnableRegisterId
, &InByte
);
469 if (ACPI_FAILURE (Status
))
471 return_ACPI_STATUS (Status
);
476 LocalEventStatus
|= ACPI_EVENT_FLAG_ENABLED
;
479 /* Fixed event currently active? */
481 Status
= AcpiReadBitRegister (
482 AcpiGbl_FixedEventInfo
[Event
].StatusRegisterId
, &InByte
);
483 if (ACPI_FAILURE (Status
))
485 return_ACPI_STATUS (Status
);
490 LocalEventStatus
|= ACPI_EVENT_FLAG_SET
;
493 (*EventStatus
) = LocalEventStatus
;
494 return_ACPI_STATUS (AE_OK
);
497 ACPI_EXPORT_SYMBOL (AcpiGetEventStatus
)
499 #endif /* !ACPI_REDUCED_HARDWARE */