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  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 - 2011, 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 "acpi.h"
  120. #include "accommon.h"
  121. #include "actables.h"
  122.  
  123. #define _COMPONENT          ACPI_EVENTS
  124.         ACPI_MODULE_NAME    ("evxfevnt")
  125.  
  126.  
  127. /*******************************************************************************
  128.  *
  129.  * FUNCTION:    AcpiEnable
  130.  *
  131.  * PARAMETERS:  None
  132.  *
  133.  * RETURN:      Status
  134.  *
  135.  * DESCRIPTION: Transfers the system into ACPI mode.
  136.  *
  137.  ******************************************************************************/
  138.  
  139. ACPI_STATUS
  140. AcpiEnable (
  141.     void)
  142. {
  143.     ACPI_STATUS             Status = AE_OK;
  144.  
  145.  
  146.     ACPI_FUNCTION_TRACE (AcpiEnable);
  147.  
  148.  
  149.     /* ACPI tables must be present */
  150.  
  151.     if (!AcpiTbTablesLoaded ())
  152.     {
  153.         return_ACPI_STATUS (AE_NO_ACPI_TABLES);
  154.     }
  155.  
  156.     /* Check current mode */
  157.  
  158.     if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
  159.     {
  160.         ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
  161.     }
  162.     else
  163.     {
  164.         /* Transition to ACPI mode */
  165.  
  166.         Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
  167.         if (ACPI_FAILURE (Status))
  168.         {
  169.             ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode"));
  170.             return_ACPI_STATUS (Status);
  171.         }
  172.  
  173.         ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
  174.             "Transition to ACPI mode successful\n"));
  175.     }
  176.  
  177.     return_ACPI_STATUS (Status);
  178. }
  179.  
  180. ACPI_EXPORT_SYMBOL (AcpiEnable)
  181.  
  182.  
  183. /*******************************************************************************
  184.  *
  185.  * FUNCTION:    AcpiDisable
  186.  *
  187.  * PARAMETERS:  None
  188.  *
  189.  * RETURN:      Status
  190.  *
  191.  * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
  192.  *
  193.  ******************************************************************************/
  194.  
  195. ACPI_STATUS
  196. AcpiDisable (
  197.     void)
  198. {
  199.     ACPI_STATUS             Status = AE_OK;
  200.  
  201.  
  202.     ACPI_FUNCTION_TRACE (AcpiDisable);
  203.  
  204.  
  205.     if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
  206.     {
  207.         ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
  208.             "System is already in legacy (non-ACPI) mode\n"));
  209.     }
  210.     else
  211.     {
  212.         /* Transition to LEGACY mode */
  213.  
  214.         Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
  215.  
  216.         if (ACPI_FAILURE (Status))
  217.         {
  218.             ACPI_ERROR ((AE_INFO,
  219.                 "Could not exit ACPI mode to legacy mode"));
  220.             return_ACPI_STATUS (Status);
  221.         }
  222.  
  223.         ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
  224.     }
  225.  
  226.     return_ACPI_STATUS (Status);
  227. }
  228.  
  229. ACPI_EXPORT_SYMBOL (AcpiDisable)
  230.  
  231.  
  232. /*******************************************************************************
  233.  *
  234.  * FUNCTION:    AcpiEnableEvent
  235.  *
  236.  * PARAMETERS:  Event           - The fixed eventto be enabled
  237.  *              Flags           - Reserved
  238.  *
  239.  * RETURN:      Status
  240.  *
  241.  * DESCRIPTION: Enable an ACPI event (fixed)
  242.  *
  243.  ******************************************************************************/
  244.  
  245. ACPI_STATUS
  246. AcpiEnableEvent (
  247.     UINT32                  Event,
  248.     UINT32                  Flags)
  249. {
  250.     ACPI_STATUS             Status = AE_OK;
  251.     UINT32                  Value;
  252.  
  253.  
  254.     ACPI_FUNCTION_TRACE (AcpiEnableEvent);
  255.  
  256.  
  257.     /* Decode the Fixed Event */
  258.  
  259.     if (Event > ACPI_EVENT_MAX)
  260.     {
  261.         return_ACPI_STATUS (AE_BAD_PARAMETER);
  262.     }
  263.  
  264.     /*
  265.      * Enable the requested fixed event (by writing a one to the enable
  266.      * register bit)
  267.      */
  268.     Status = AcpiWriteBitRegister (
  269.                 AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
  270.                 ACPI_ENABLE_EVENT);
  271.     if (ACPI_FAILURE (Status))
  272.     {
  273.         return_ACPI_STATUS (Status);
  274.     }
  275.  
  276.     /* Make sure that the hardware responded */
  277.  
  278.     Status = AcpiReadBitRegister (
  279.                 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &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.  
  295. ACPI_EXPORT_SYMBOL (AcpiEnableEvent)
  296.  
  297.  
  298. /*******************************************************************************
  299.  *
  300.  * FUNCTION:    AcpiDisableEvent
  301.  *
  302.  * PARAMETERS:  Event           - The fixed event to be disabled
  303.  *              Flags           - Reserved
  304.  *
  305.  * RETURN:      Status
  306.  *
  307.  * DESCRIPTION: Disable an ACPI event (fixed)
  308.  *
  309.  ******************************************************************************/
  310.  
  311. ACPI_STATUS
  312. AcpiDisableEvent (
  313.     UINT32                  Event,
  314.     UINT32                  Flags)
  315. {
  316.     ACPI_STATUS             Status = AE_OK;
  317.     UINT32                  Value;
  318.  
  319.  
  320.     ACPI_FUNCTION_TRACE (AcpiDisableEvent);
  321.  
  322.  
  323.     /* Decode the Fixed Event */
  324.  
  325.     if (Event > ACPI_EVENT_MAX)
  326.     {
  327.         return_ACPI_STATUS (AE_BAD_PARAMETER);
  328.     }
  329.  
  330.     /*
  331.      * Disable the requested fixed event (by writing a zero to the enable
  332.      * register bit)
  333.      */
  334.     Status = AcpiWriteBitRegister (
  335.                 AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
  336.                 ACPI_DISABLE_EVENT);
  337.     if (ACPI_FAILURE (Status))
  338.     {
  339.         return_ACPI_STATUS (Status);
  340.     }
  341.  
  342.     Status = AcpiReadBitRegister (
  343.                 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value);
  344.     if (ACPI_FAILURE (Status))
  345.     {
  346.         return_ACPI_STATUS (Status);
  347.     }
  348.  
  349.     if (Value != 0)
  350.     {
  351.         ACPI_ERROR ((AE_INFO,
  352.             "Could not disable %s events", AcpiUtGetEventName (Event)));
  353.         return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
  354.     }
  355.  
  356.     return_ACPI_STATUS (Status);
  357. }
  358.  
  359. ACPI_EXPORT_SYMBOL (AcpiDisableEvent)
  360.  
  361.  
  362. /*******************************************************************************
  363.  *
  364.  * FUNCTION:    AcpiClearEvent
  365.  *
  366.  * PARAMETERS:  Event           - The fixed event to be cleared
  367.  *
  368.  * RETURN:      Status
  369.  *
  370.  * DESCRIPTION: Clear an ACPI event (fixed)
  371.  *
  372.  ******************************************************************************/
  373.  
  374. ACPI_STATUS
  375. AcpiClearEvent (
  376.     UINT32                  Event)
  377. {
  378.     ACPI_STATUS             Status = AE_OK;
  379.  
  380.  
  381.     ACPI_FUNCTION_TRACE (AcpiClearEvent);
  382.  
  383.  
  384.     /* Decode the Fixed Event */
  385.  
  386.     if (Event > ACPI_EVENT_MAX)
  387.     {
  388.         return_ACPI_STATUS (AE_BAD_PARAMETER);
  389.     }
  390.  
  391.     /*
  392.      * Clear the requested fixed event (By writing a one to the status
  393.      * register bit)
  394.      */
  395.     Status = AcpiWriteBitRegister (
  396.                 AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
  397.                 ACPI_CLEAR_STATUS);
  398.  
  399.     return_ACPI_STATUS (Status);
  400. }
  401.  
  402. ACPI_EXPORT_SYMBOL (AcpiClearEvent)
  403.  
  404.  
  405. /*******************************************************************************
  406.  *
  407.  * FUNCTION:    AcpiGetEventStatus
  408.  *
  409.  * PARAMETERS:  Event           - The fixed event
  410.  *              EventStatus     - Where the current status of the event will
  411.  *                                be returned
  412.  *
  413.  * RETURN:      Status
  414.  *
  415.  * DESCRIPTION: Obtains and returns the current status of the event
  416.  *
  417.  ******************************************************************************/
  418.  
  419. ACPI_STATUS
  420. AcpiGetEventStatus (
  421.     UINT32                  Event,
  422.     ACPI_EVENT_STATUS       *EventStatus)
  423. {
  424.     ACPI_STATUS             Status = AE_OK;
  425.  
  426.  
  427.     ACPI_FUNCTION_TRACE (AcpiGetEventStatus);
  428.  
  429.  
  430.     if (!EventStatus)
  431.     {
  432.         return_ACPI_STATUS (AE_BAD_PARAMETER);
  433.     }
  434.  
  435.     /* Decode the Fixed Event */
  436.  
  437.     if (Event > ACPI_EVENT_MAX)
  438.     {
  439.         return_ACPI_STATUS (AE_BAD_PARAMETER);
  440.     }
  441.  
  442.     /* Get the status of the requested fixed event */
  443.  
  444.     Status = AcpiReadBitRegister (
  445.                 AcpiGbl_FixedEventInfo[Event].StatusRegisterId, EventStatus);
  446.  
  447.     return_ACPI_STATUS (Status);
  448. }
  449.  
  450. ACPI_EXPORT_SYMBOL (AcpiGetEventStatus)
  451.  
  452.  
  453.