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  1. /******************************************************************************
  2.  *
  3.  * Module Name: evevent - Fixed Event handling and dispatch
  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. #include "acpi.h"
  117. #include "accommon.h"
  118. #include "acevents.h"
  119.  
  120. #define _COMPONENT          ACPI_EVENTS
  121.         ACPI_MODULE_NAME    ("evevent")
  122.  
  123. /* Local prototypes */
  124.  
  125. static ACPI_STATUS
  126. AcpiEvFixedEventInitialize (
  127.     void);
  128.  
  129. static UINT32
  130. AcpiEvFixedEventDispatch (
  131.     UINT32                  Event);
  132.  
  133.  
  134. /*******************************************************************************
  135.  *
  136.  * FUNCTION:    AcpiEvInitializeEvents
  137.  *
  138.  * PARAMETERS:  None
  139.  *
  140.  * RETURN:      Status
  141.  *
  142.  * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
  143.  *
  144.  ******************************************************************************/
  145.  
  146. ACPI_STATUS
  147. AcpiEvInitializeEvents (
  148.     void)
  149. {
  150.     ACPI_STATUS             Status;
  151.  
  152.  
  153.     ACPI_FUNCTION_TRACE (EvInitializeEvents);
  154.  
  155.  
  156.     /*
  157.      * Initialize the Fixed and General Purpose Events. This is done prior to
  158.      * enabling SCIs to prevent interrupts from occurring before the handlers
  159.      * are installed.
  160.      */
  161.     Status = AcpiEvFixedEventInitialize ();
  162.     if (ACPI_FAILURE (Status))
  163.     {
  164.         ACPI_EXCEPTION ((AE_INFO, Status,
  165.             "Unable to initialize fixed events"));
  166.         return_ACPI_STATUS (Status);
  167.     }
  168.  
  169.     Status = AcpiEvGpeInitialize ();
  170.     if (ACPI_FAILURE (Status))
  171.     {
  172.         ACPI_EXCEPTION ((AE_INFO, Status,
  173.             "Unable to initialize general purpose events"));
  174.         return_ACPI_STATUS (Status);
  175.     }
  176.  
  177.     return_ACPI_STATUS (Status);
  178. }
  179.  
  180.  
  181. /*******************************************************************************
  182.  *
  183.  * FUNCTION:    AcpiEvInstallXruptHandlers
  184.  *
  185.  * PARAMETERS:  None
  186.  *
  187.  * RETURN:      Status
  188.  *
  189.  * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
  190.  *
  191.  ******************************************************************************/
  192.  
  193. ACPI_STATUS
  194. AcpiEvInstallXruptHandlers (
  195.     void)
  196. {
  197.     ACPI_STATUS             Status;
  198.  
  199.  
  200.     ACPI_FUNCTION_TRACE (EvInstallXruptHandlers);
  201.  
  202.  
  203.     /* Install the SCI handler */
  204.  
  205.     Status = AcpiEvInstallSciHandler ();
  206.     if (ACPI_FAILURE (Status))
  207.     {
  208.         ACPI_EXCEPTION ((AE_INFO, Status,
  209.             "Unable to install System Control Interrupt handler"));
  210.         return_ACPI_STATUS (Status);
  211.     }
  212.  
  213.     /* Install the handler for the Global Lock */
  214.  
  215.     Status = AcpiEvInitGlobalLockHandler ();
  216.     if (ACPI_FAILURE (Status))
  217.     {
  218.         ACPI_EXCEPTION ((AE_INFO, Status,
  219.             "Unable to initialize Global Lock handler"));
  220.         return_ACPI_STATUS (Status);
  221.     }
  222.  
  223.     AcpiGbl_EventsInitialized = TRUE;
  224.     return_ACPI_STATUS (Status);
  225. }
  226.  
  227.  
  228. /*******************************************************************************
  229.  *
  230.  * FUNCTION:    AcpiEvFixedEventInitialize
  231.  *
  232.  * PARAMETERS:  None
  233.  *
  234.  * RETURN:      Status
  235.  *
  236.  * DESCRIPTION: Install the fixed event handlers and disable all fixed events.
  237.  *
  238.  ******************************************************************************/
  239.  
  240. static ACPI_STATUS
  241. AcpiEvFixedEventInitialize (
  242.     void)
  243. {
  244.     UINT32                  i;
  245.     ACPI_STATUS             Status;
  246.  
  247.  
  248.     /*
  249.      * Initialize the structure that keeps track of fixed event handlers and
  250.      * enable the fixed events.
  251.      */
  252.     for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
  253.     {
  254.         AcpiGbl_FixedEventHandlers[i].Handler = NULL;
  255.         AcpiGbl_FixedEventHandlers[i].Context = NULL;
  256.  
  257.         /* Disable the fixed event */
  258.  
  259.         if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF)
  260.         {
  261.             Status = AcpiWriteBitRegister (
  262.                         AcpiGbl_FixedEventInfo[i].EnableRegisterId,
  263.                         ACPI_DISABLE_EVENT);
  264.             if (ACPI_FAILURE (Status))
  265.             {
  266.                 return (Status);
  267.             }
  268.         }
  269.     }
  270.  
  271.     return (AE_OK);
  272. }
  273.  
  274.  
  275. /*******************************************************************************
  276.  *
  277.  * FUNCTION:    AcpiEvFixedEventDetect
  278.  *
  279.  * PARAMETERS:  None
  280.  *
  281.  * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
  282.  *
  283.  * DESCRIPTION: Checks the PM status register for active fixed events
  284.  *
  285.  ******************************************************************************/
  286.  
  287. UINT32
  288. AcpiEvFixedEventDetect (
  289.     void)
  290. {
  291.     UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
  292.     UINT32                  FixedStatus;
  293.     UINT32                  FixedEnable;
  294.     UINT32                  i;
  295.  
  296.  
  297.     ACPI_FUNCTION_NAME (EvFixedEventDetect);
  298.  
  299.  
  300.     /*
  301.      * Read the fixed feature status and enable registers, as all the cases
  302.      * depend on their values. Ignore errors here.
  303.      */
  304.     (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus);
  305.     (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable);
  306.  
  307.     ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
  308.         "Fixed Event Block: Enable %08X Status %08X\n",
  309.         FixedEnable, FixedStatus));
  310.  
  311.     /*
  312.      * Check for all possible Fixed Events and dispatch those that are active
  313.      */
  314.     for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
  315.     {
  316.         /* Both the status and enable bits must be on for this event */
  317.  
  318.         if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) &&
  319.             (FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask))
  320.         {
  321.             /*
  322.              * Found an active (signalled) event. Invoke global event
  323.              * handler if present.
  324.              */
  325.             AcpiFixedEventCount[i]++;
  326.             if (AcpiGbl_GlobalEventHandler)
  327.             {
  328.                 AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_FIXED, NULL,
  329.                      i, AcpiGbl_GlobalEventHandlerContext);
  330.             }
  331.  
  332.             IntStatus |= AcpiEvFixedEventDispatch (i);
  333.         }
  334.     }
  335.  
  336.     return (IntStatus);
  337. }
  338.  
  339.  
  340. /*******************************************************************************
  341.  *
  342.  * FUNCTION:    AcpiEvFixedEventDispatch
  343.  *
  344.  * PARAMETERS:  Event               - Event type
  345.  *
  346.  * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
  347.  *
  348.  * DESCRIPTION: Clears the status bit for the requested event, calls the
  349.  *              handler that previously registered for the event.
  350.  *
  351.  ******************************************************************************/
  352.  
  353. static UINT32
  354. AcpiEvFixedEventDispatch (
  355.     UINT32                  Event)
  356. {
  357.  
  358.     ACPI_FUNCTION_ENTRY ();
  359.  
  360.  
  361.     /* Clear the status bit */
  362.  
  363.     (void) AcpiWriteBitRegister (
  364.             AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
  365.             ACPI_CLEAR_STATUS);
  366.  
  367.     /*
  368.      * Make sure we've got a handler. If not, report an error. The event is
  369.      * disabled to prevent further interrupts.
  370.      */
  371.     if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler)
  372.     {
  373.         (void) AcpiWriteBitRegister (
  374.                 AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
  375.                 ACPI_DISABLE_EVENT);
  376.  
  377.         ACPI_ERROR ((AE_INFO,
  378.             "No installed handler for fixed event [0x%08X]",
  379.             Event));
  380.  
  381.         return (ACPI_INTERRUPT_NOT_HANDLED);
  382.     }
  383.  
  384.     /* Invoke the Fixed Event handler */
  385.  
  386.     return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
  387.                 AcpiGbl_FixedEventHandlers[Event].Context));
  388. }
  389.  
  390.  
  391.