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/******************************************************************************
*
* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
* $Revision: 38 $
*
*****************************************************************************/
/*
* Copyright (C) 2000, 2001 R. Byron Moore
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "acpi.h"
#include "achware.h"
#include "acnamesp.h"
#include "acevents.h"
#include "amlcode.h"
#include "acinterp.h"
#define _COMPONENT ACPI_EVENTS
MODULE_NAME ("evxfevnt")
/*******************************************************************************
*
* FUNCTION: Acpi_enable
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Transfers the system into ACPI mode.
*
******************************************************************************/
acpi_status
acpi_enable (void)
{
acpi_status status;
FUNCTION_TRACE ("Acpi_enable");
/* Make sure we've got ACPI tables */
if (!acpi_gbl_DSDT) {
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No ACPI tables present!\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Make sure the BIOS supports ACPI mode */
if (SYS_MODE_LEGACY == acpi_hw_get_mode_capabilities()) {
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Only legacy mode supported!\n"));
return_ACPI_STATUS (AE_ERROR);
}
/* Transition to ACPI mode */
status = acpi_hw_set_mode (SYS_MODE_ACPI);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_FATAL, "Could not transition to ACPI mode.\n"));
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_OK, "Transition to ACPI mode successful\n"));
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_disable
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Returns the system to original ACPI/legacy mode, and
* uninstalls the SCI interrupt handler.
*
******************************************************************************/
acpi_status
acpi_disable (void)
{
acpi_status status;
FUNCTION_TRACE ("Acpi_disable");
/* Restore original mode */
status = acpi_hw_set_mode (acpi_gbl_original_mode);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unable to transition to original mode"));
return_ACPI_STATUS (status);
}
/* Unload the SCI interrupt handler */
acpi_ev_remove_sci_handler ();
acpi_ev_restore_acpi_state ();
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_enable_event
*
* PARAMETERS: Event - The fixed event or GPE to be enabled
* Type - The type of event
* Flags - Just enable, or also wake enable?
*
* RETURN: Status
*
* DESCRIPTION: Enable an ACPI event (fixed and general purpose)
*
******************************************************************************/
acpi_status
acpi_enable_event (
u32 event,
u32 type,
u32 flags)
{
acpi_status status = AE_OK;
u32 register_id;
FUNCTION_TRACE ("Acpi_enable_event");
/* The Type must be either Fixed Acpi_event or GPE */
switch (type) {
case ACPI_EVENT_FIXED:
/* Decode the Fixed Acpi_event */
switch (event) {
case ACPI_EVENT_PMTIMER:
register_id = TMR_EN;
break;
case ACPI_EVENT_GLOBAL:
register_id = GBL_EN;
break;
case ACPI_EVENT_POWER_BUTTON:
register_id = PWRBTN_EN;
break;
case ACPI_EVENT_SLEEP_BUTTON:
register_id = SLPBTN_EN;
break;
case ACPI_EVENT_RTC:
register_id = RTC_EN;
break;
default:
return_ACPI_STATUS (AE_BAD_PARAMETER);
break;
}
/*
* Enable the requested fixed event (by writing a one to the
* enable register bit)
*/
acpi_hw_register_bit_access (ACPI_WRITE, ACPI_MTX_LOCK, register_id, 1);
if (1 != acpi_hw_register_bit_access(ACPI_READ, ACPI_MTX_LOCK, register_id)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Fixed event bit clear when it should be set\n"));
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
}
break;
case ACPI_EVENT_GPE:
/* Ensure that we have a valid GPE number */
if ((event > ACPI_GPE_MAX) ||
(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Enable the requested GPE number */
if (flags & ACPI_EVENT_ENABLE) {
acpi_hw_enable_gpe (event);
}
if (flags & ACPI_EVENT_WAKE_ENABLE) {
acpi_hw_enable_gpe_for_wakeup (event);
}
break;
default:
status = AE_BAD_PARAMETER;
}
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_disable_event
*
* PARAMETERS: Event - The fixed event or GPE to be enabled
* Type - The type of event, fixed or general purpose
* Flags - Wake disable vs. non-wake disable
*
* RETURN: Status
*
* DESCRIPTION: Disable an ACPI event (fixed and general purpose)
*
******************************************************************************/
acpi_status
acpi_disable_event (
u32 event,
u32 type,
u32 flags)
{
acpi_status status = AE_OK;
u32 register_id;
FUNCTION_TRACE ("Acpi_disable_event");
/* The Type must be either Fixed Acpi_event or GPE */
switch (type) {
case ACPI_EVENT_FIXED:
/* Decode the Fixed Acpi_event */
switch (event) {
case ACPI_EVENT_PMTIMER:
register_id = TMR_EN;
break;
case ACPI_EVENT_GLOBAL:
register_id = GBL_EN;
break;
case ACPI_EVENT_POWER_BUTTON:
register_id = PWRBTN_EN;
break;
case ACPI_EVENT_SLEEP_BUTTON:
register_id = SLPBTN_EN;
break;
case ACPI_EVENT_RTC:
register_id = RTC_EN;
break;
default:
return_ACPI_STATUS (AE_BAD_PARAMETER);
break;
}
/*
* Disable the requested fixed event (by writing a zero to the
* enable register bit)
*/
acpi_hw_register_bit_access (ACPI_WRITE, ACPI_MTX_LOCK, register_id, 0);
if (0 != acpi_hw_register_bit_access(ACPI_READ, ACPI_MTX_LOCK, register_id)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Fixed event bit set when it should be clear,\n"));
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
}
break;
case ACPI_EVENT_GPE:
/* Ensure that we have a valid GPE number */
if ((event > ACPI_GPE_MAX) ||
(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Disable the requested GPE number */
if (flags & ACPI_EVENT_DISABLE) {
acpi_hw_disable_gpe (event);
}
if (flags & ACPI_EVENT_WAKE_DISABLE) {
acpi_hw_disable_gpe_for_wakeup (event);
}
break;
default:
status = AE_BAD_PARAMETER;
}
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_clear_event
*
* PARAMETERS: Event - The fixed event or GPE to be cleared
* Type - The type of event
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (fixed and general purpose)
*
******************************************************************************/
acpi_status
acpi_clear_event (
u32 event,
u32 type)
{
acpi_status status = AE_OK;
u32 register_id;
FUNCTION_TRACE ("Acpi_clear_event");
/* The Type must be either Fixed Acpi_event or GPE */
switch (type) {
case ACPI_EVENT_FIXED:
/* Decode the Fixed Acpi_event */
switch (event) {
case ACPI_EVENT_PMTIMER:
register_id = TMR_STS;
break;
case ACPI_EVENT_GLOBAL:
register_id = GBL_STS;
break;
case ACPI_EVENT_POWER_BUTTON:
register_id = PWRBTN_STS;
break;
case ACPI_EVENT_SLEEP_BUTTON:
register_id = SLPBTN_STS;
break;
case ACPI_EVENT_RTC:
register_id = RTC_STS;
break;
default:
return_ACPI_STATUS (AE_BAD_PARAMETER);
break;
}
/*
* Clear the requested fixed event (By writing a one to the
* status register bit)
*/
acpi_hw_register_bit_access (ACPI_WRITE, ACPI_MTX_LOCK, register_id, 1);
break;
case ACPI_EVENT_GPE:
/* Ensure that we have a valid GPE number */
if ((event > ACPI_GPE_MAX) ||
(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
acpi_hw_clear_gpe (event);
break;
default:
status = AE_BAD_PARAMETER;
}
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_get_event_status
*
* PARAMETERS: Event - The fixed event or GPE
* Type - The type of event
* Status - Where the current status of the event will
* be returned
*
* RETURN: Status
*
* DESCRIPTION: Obtains and returns the current status of the event
*
******************************************************************************/
acpi_status
acpi_get_event_status (
u32 event,
u32 type,
acpi_event_status *event_status)
{
acpi_status status = AE_OK;
u32 register_id;
FUNCTION_TRACE ("Acpi_get_event_status");
if (!event_status) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* The Type must be either Fixed Acpi_event or GPE */
switch (type) {
case ACPI_EVENT_FIXED:
/* Decode the Fixed Acpi_event */
switch (event) {
case ACPI_EVENT_PMTIMER:
register_id = TMR_STS;
break;
case ACPI_EVENT_GLOBAL:
register_id = GBL_STS;
break;
case ACPI_EVENT_POWER_BUTTON:
register_id = PWRBTN_STS;
break;
case ACPI_EVENT_SLEEP_BUTTON:
register_id = SLPBTN_STS;
break;
case ACPI_EVENT_RTC:
register_id = RTC_STS;
break;
default:
return_ACPI_STATUS (AE_BAD_PARAMETER);
break;
}
/* Get the status of the requested fixed event */
*event_status = acpi_hw_register_bit_access (ACPI_READ, ACPI_MTX_LOCK, register_id);
break;
case ACPI_EVENT_GPE:
/* Ensure that we have a valid GPE number */
if ((event > ACPI_GPE_MAX) ||
(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Obtain status on the requested GPE number */
acpi_hw_get_gpe_status (event, event_status);
break;
default:
status = AE_BAD_PARAMETER;
}
return_ACPI_STATUS (status);
}
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