366 строки
8.7 KiB
C
366 строки
8.7 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
|
|
*
|
|
* Copyright (C) 2000 - 2021, Intel Corp.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#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);
|
|
|
|
/* If Hardware Reduced flag is set, there are no fixed events */
|
|
|
|
if (acpi_gbl_reduced_hardware) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* If Hardware Reduced flag is set, there are no fixed events */
|
|
|
|
if (acpi_gbl_reduced_hardware) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* If Hardware Reduced flag is set, there are no fixed events */
|
|
|
|
if (acpi_gbl_reduced_hardware) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* 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 */
|