freebsd-skq/sys/contrib/dev/acpica/evsci.c
2001-01-31 09:17:50 +00:00

437 lines
14 KiB
C

/*******************************************************************************
*
* Module Name: evsci - System Control Interrupt configuration and
* legacy to ACPI mode state transition functions
* $Revision: 69 $
*
******************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#include "acpi.h"
#include "acnamesp.h"
#include "achware.h"
#include "acevents.h"
#define _COMPONENT EVENT_HANDLING
MODULE_NAME ("evsci")
/*
* Elements correspond to counts for TMR, NOT_USED, GBL, PWR_BTN, SLP_BTN, RTC,
* and GENERAL respectively. These counts are modified by the ACPI interrupt
* handler.
*
* TBD: [Investigate] Note that GENERAL should probably be split out into
* one element for each bit in the GPE registers
*/
/*******************************************************************************
*
* FUNCTION: AcpiEvSciHandler
*
* PARAMETERS: Context - Calling Context
*
* RETURN: Status code indicates whether interrupt was handled.
*
* DESCRIPTION: Interrupt handler that will figure out what function or
* control method to call to deal with a SCI. Installed
* using BU interrupt support.
*
******************************************************************************/
static UINT32
AcpiEvSciHandler (void *Context)
{
UINT32 InterruptHandled = INTERRUPT_NOT_HANDLED;
FUNCTION_TRACE("EvSciHandler");
/*
* Make sure that ACPI is enabled by checking SCI_EN. Note that we are
* required to treat the SCI interrupt as sharable, level, active low.
*/
if (!AcpiHwRegisterBitAccess (ACPI_READ, ACPI_MTX_DO_NOT_LOCK, SCI_EN))
{
/* ACPI is not enabled; this interrupt cannot be for us */
return_VALUE (INTERRUPT_NOT_HANDLED);
}
/*
* Fixed AcpiEvents:
* -------------
* Check for and dispatch any Fixed AcpiEvents that have occurred
*/
InterruptHandled |= AcpiEvFixedEventDetect ();
/*
* GPEs:
* -----
* Check for and dispatch any GPEs that have occurred
*/
InterruptHandled |= AcpiEvGpeDetect ();
return_VALUE (InterruptHandled);
}
/******************************************************************************
*
* FUNCTION: AcpiEvInstallSciHandler
*
* PARAMETERS: none
*
* RETURN: Status
*
* DESCRIPTION: Installs SCI handler.
*
******************************************************************************/
UINT32
AcpiEvInstallSciHandler (void)
{
UINT32 Except = AE_OK;
FUNCTION_TRACE ("EvInstallSciHandler");
Except = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT->SciInt,
AcpiEvSciHandler,
NULL);
return_ACPI_STATUS (Except);
}
/******************************************************************************
*
* FUNCTION: AcpiEvRemoveSciHandler
*
* PARAMETERS: none
*
* RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not
* installed to begin with
*
* DESCRIPTION: Restores original status of all fixed event enable bits and
* removes SCI handler.
*
******************************************************************************/
ACPI_STATUS
AcpiEvRemoveSciHandler (void)
{
FUNCTION_TRACE ("EvRemoveSciHandler");
#if 0
/* TBD:[Investigate] Figure this out!! Disable all events first ??? */
if (OriginalFixedEnableBitStatus ^ 1 << AcpiEventIndex (TMR_FIXED_EVENT))
{
AcpiEventDisableEvent (TMR_FIXED_EVENT);
}
if (OriginalFixedEnableBitStatus ^ 1 << AcpiEventIndex (GBL_FIXED_EVENT))
{
AcpiEventDisableEvent (GBL_FIXED_EVENT);
}
if (OriginalFixedEnableBitStatus ^ 1 << AcpiEventIndex (PWR_BTN_FIXED_EVENT))
{
AcpiEventDisableEvent (PWR_BTN_FIXED_EVENT);
}
if (OriginalFixedEnableBitStatus ^ 1 << AcpiEventIndex (SLP_BTN_FIXED_EVENT))
{
AcpiEventDisableEvent (SLP_BTN_FIXED_EVENT);
}
if (OriginalFixedEnableBitStatus ^ 1 << AcpiEventIndex (RTC_FIXED_EVENT))
{
AcpiEventDisableEvent (RTC_FIXED_EVENT);
}
OriginalFixedEnableBitStatus = 0;
#endif
AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT->SciInt,
AcpiEvSciHandler);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvSciCount
*
* PARAMETERS: Event Event that generated an SCI.
*
* RETURN: Number of SCI's for requested event since last time
* SciOccured() was called for this event.
*
* DESCRIPTION: Checks to see if SCI has been generated from requested source
* since the last time this function was called.
*
******************************************************************************/
#ifdef ACPI_DEBUG
UINT32
AcpiEvSciCount (
UINT32 Event)
{
UINT32 Count;
FUNCTION_TRACE ("EvSciCount");
/*
* Elements correspond to counts for TMR, NOT_USED, GBL,
* PWR_BTN, SLP_BTN, RTC, and GENERAL respectively.
*/
if (Event >= NUM_FIXED_EVENTS)
{
Count = (UINT32) -1;
}
else
{
Count = AcpiGbl_EventCount[Event];
}
return_VALUE (Count);
}
#endif
/*******************************************************************************
*
* FUNCTION: AcpiEvRestoreAcpiState
*
* PARAMETERS: none
*
* RETURN: none
*
* DESCRIPTION: Restore the original ACPI state of the machine
*
******************************************************************************/
void
AcpiEvRestoreAcpiState (void)
{
UINT32 Index;
FUNCTION_TRACE ("EvRestoreAcpiState");
/* Restore the state of the chipset enable bits. */
if (AcpiGbl_RestoreAcpiChipset == TRUE)
{
/* Restore the fixed events */
if (AcpiHwRegisterRead (ACPI_MTX_LOCK, PM1_EN) !=
AcpiGbl_Pm1EnableRegisterSave)
{
AcpiHwRegisterWrite (ACPI_MTX_LOCK, PM1_EN,
AcpiGbl_Pm1EnableRegisterSave);
}
/* Ensure that all status bits are clear */
AcpiHwClearAcpiStatus ();
/* Now restore the GPEs */
for (Index = 0; Index < DIV_2 (AcpiGbl_FADT->Gpe0BlkLen); Index++)
{
if (AcpiHwRegisterRead (ACPI_MTX_LOCK, GPE0_EN_BLOCK | Index) !=
AcpiGbl_Gpe0EnableRegisterSave[Index])
{
AcpiHwRegisterWrite (ACPI_MTX_LOCK, GPE0_EN_BLOCK | Index,
AcpiGbl_Gpe0EnableRegisterSave[Index]);
}
}
/* GPE 1 present? */
if (AcpiGbl_FADT->Gpe1BlkLen)
{
for (Index = 0; Index < DIV_2 (AcpiGbl_FADT->Gpe1BlkLen); Index++)
{
if (AcpiHwRegisterRead (ACPI_MTX_LOCK, GPE1_EN_BLOCK | Index) !=
AcpiGbl_Gpe1EnableRegisterSave[Index])
{
AcpiHwRegisterWrite (ACPI_MTX_LOCK, GPE1_EN_BLOCK | Index,
AcpiGbl_Gpe1EnableRegisterSave[Index]);
}
}
}
if (AcpiHwGetMode() != AcpiGbl_OriginalMode)
{
AcpiHwSetMode (AcpiGbl_OriginalMode);
}
}
return_VOID;
}
/******************************************************************************
*
* FUNCTION: AcpiEvTerminate
*
* PARAMETERS: none
*
* RETURN: none
*
* DESCRIPTION: free memory allocated for table storage.
*
******************************************************************************/
void
AcpiEvTerminate (void)
{
FUNCTION_TRACE ("EvTerminate");
/*
* Free global tables, etc.
*/
if (AcpiGbl_GpeRegisters)
{
AcpiCmFree (AcpiGbl_GpeRegisters);
}
if (AcpiGbl_GpeInfo)
{
AcpiCmFree (AcpiGbl_GpeInfo);
}
return_VOID;
}