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/****************************************************************************** |
* |
* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable |
* |
*****************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, Intel Corp. |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* 1. Redistributions of source code must retain the above copyright |
* notice, this list of conditions, and the following disclaimer, |
* without modification. |
* 2. Redistributions in binary form must reproduce at minimum a disclaimer |
* substantially similar to the "NO WARRANTY" disclaimer below |
* ("Disclaimer") and any redistribution must be conditioned upon |
* including a substantially similar Disclaimer requirement for further |
* binary redistribution. |
* 3. Neither the names of the above-listed copyright holders nor the names |
* of any contributors may be used to endorse or promote products derived |
* from this software without specific prior written permission. |
* |
* Alternatively, this software may be distributed under the terms of the |
* GNU General Public License ("GPL") version 2 as published by the Free |
* Software Foundation. |
* |
* NO WARRANTY |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
* POSSIBILITY OF SUCH DAMAGES. |
*/ |
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#define EXPORT_ACPI_INTERFACES |
|
#include <acpi/acpi.h> |
#include "accommon.h" |
#include "actables.h" |
|
#define _COMPONENT ACPI_EVENTS |
ACPI_MODULE_NAME("evxfevnt") |
|
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
/******************************************************************************* |
* |
* FUNCTION: acpi_enable |
* |
* PARAMETERS: None |
* |
* RETURN: Status |
* |
* DESCRIPTION: Transfers the system into ACPI mode. |
* |
******************************************************************************/ |
acpi_status acpi_enable(void) |
{ |
acpi_status status; |
int retry; |
|
ACPI_FUNCTION_TRACE(acpi_enable); |
|
/* ACPI tables must be present */ |
|
if (acpi_gbl_fadt_index == ACPI_INVALID_TABLE_INDEX) { |
return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
} |
|
/* If the Hardware Reduced flag is set, machine is always in acpi mode */ |
|
if (acpi_gbl_reduced_hardware) { |
return_ACPI_STATUS(AE_OK); |
} |
|
/* Check current mode */ |
|
if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { |
ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
"System is already in ACPI mode\n")); |
return_ACPI_STATUS(AE_OK); |
} |
|
/* Transition to ACPI mode */ |
|
status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI); |
if (ACPI_FAILURE(status)) { |
ACPI_ERROR((AE_INFO, |
"Could not transition to ACPI mode")); |
return_ACPI_STATUS(status); |
} |
|
/* Sanity check that transition succeeded */ |
|
for (retry = 0; retry < 30000; ++retry) { |
if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { |
if (retry != 0) |
ACPI_WARNING((AE_INFO, |
"Platform took > %d00 usec to enter ACPI mode", retry)); |
return_ACPI_STATUS(AE_OK); |
} |
acpi_os_stall(100); /* 100 usec */ |
} |
|
ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode")); |
return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_enable) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_disable |
* |
* PARAMETERS: None |
* |
* RETURN: Status |
* |
* DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. |
* |
******************************************************************************/ |
acpi_status acpi_disable(void) |
{ |
acpi_status status = AE_OK; |
|
ACPI_FUNCTION_TRACE(acpi_disable); |
|
/* If the Hardware Reduced flag is set, machine is always in acpi mode */ |
|
if (acpi_gbl_reduced_hardware) { |
return_ACPI_STATUS(AE_OK); |
} |
|
if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { |
ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
"System is already in legacy (non-ACPI) mode\n")); |
} else { |
/* Transition to LEGACY mode */ |
|
status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY); |
|
if (ACPI_FAILURE(status)) { |
ACPI_ERROR((AE_INFO, |
"Could not exit ACPI mode to legacy mode")); |
return_ACPI_STATUS(status); |
} |
|
ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n")); |
} |
|
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_disable) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_enable_event |
* |
* PARAMETERS: event - The fixed eventto be enabled |
* flags - Reserved |
* |
* RETURN: Status |
* |
* DESCRIPTION: Enable an ACPI event (fixed) |
* |
******************************************************************************/ |
acpi_status acpi_enable_event(u32 event, u32 flags) |
{ |
acpi_status status = AE_OK; |
u32 value; |
|
ACPI_FUNCTION_TRACE(acpi_enable_event); |
|
/* Decode the Fixed Event */ |
|
if (event > ACPI_EVENT_MAX) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
/* |
* Enable the requested fixed event (by writing a one to the enable |
* register bit) |
*/ |
status = |
acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
enable_register_id, ACPI_ENABLE_EVENT); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Make sure that the hardware responded */ |
|
status = |
acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
enable_register_id, &value); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
if (value != 1) { |
ACPI_ERROR((AE_INFO, |
"Could not enable %s event", |
acpi_ut_get_event_name(event))); |
return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
} |
|
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_enable_event) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_disable_event |
* |
* PARAMETERS: event - The fixed event to be disabled |
* flags - Reserved |
* |
* RETURN: Status |
* |
* DESCRIPTION: Disable an ACPI event (fixed) |
* |
******************************************************************************/ |
acpi_status acpi_disable_event(u32 event, u32 flags) |
{ |
acpi_status status = AE_OK; |
u32 value; |
|
ACPI_FUNCTION_TRACE(acpi_disable_event); |
|
/* Decode the Fixed Event */ |
|
if (event > ACPI_EVENT_MAX) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
/* |
* Disable the requested fixed event (by writing a zero to the enable |
* register bit) |
*/ |
status = |
acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
enable_register_id, ACPI_DISABLE_EVENT); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
status = |
acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
enable_register_id, &value); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
if (value != 0) { |
ACPI_ERROR((AE_INFO, |
"Could not disable %s events", |
acpi_ut_get_event_name(event))); |
return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
} |
|
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_disable_event) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_clear_event |
* |
* PARAMETERS: event - The fixed event to be cleared |
* |
* RETURN: Status |
* |
* DESCRIPTION: Clear an ACPI event (fixed) |
* |
******************************************************************************/ |
acpi_status acpi_clear_event(u32 event) |
{ |
acpi_status status = AE_OK; |
|
ACPI_FUNCTION_TRACE(acpi_clear_event); |
|
/* Decode the Fixed Event */ |
|
if (event > ACPI_EVENT_MAX) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
/* |
* Clear the requested fixed event (By writing a one to the status |
* register bit) |
*/ |
status = |
acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
status_register_id, ACPI_CLEAR_STATUS); |
|
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_clear_event) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_get_event_status |
* |
* PARAMETERS: event - The fixed event |
* 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, acpi_event_status * event_status) |
{ |
acpi_status status; |
acpi_event_status local_event_status = 0; |
u32 in_byte; |
|
ACPI_FUNCTION_TRACE(acpi_get_event_status); |
|
if (!event_status) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
/* Decode the Fixed Event */ |
|
if (event > ACPI_EVENT_MAX) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
/* Fixed event currently can be dispatched? */ |
|
if (acpi_gbl_fixed_event_handlers[event].handler) { |
local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER; |
} |
|
/* Fixed event currently enabled? */ |
|
status = |
acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
enable_register_id, &in_byte); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
if (in_byte) { |
local_event_status |= |
(ACPI_EVENT_FLAG_ENABLED | ACPI_EVENT_FLAG_ENABLE_SET); |
} |
|
/* Fixed event currently active? */ |
|
status = |
acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
status_register_id, &in_byte); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
if (in_byte) { |
local_event_status |= ACPI_EVENT_FLAG_STATUS_SET; |
} |
|
(*event_status) = local_event_status; |
return_ACPI_STATUS(AE_OK); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_get_event_status) |
#endif /* !ACPI_REDUCED_HARDWARE */ |