/******************************************************************************
*
* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* 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.
*/
#include <linux/module.h>
#include <acpi/acpi.h>
#include <acpi/acevents.h>
#include <acpi/acnamesp.h>
#define _COMPONENT ACPI_EVENTS
ACPI_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 = AE_OK;
ACPI_FUNCTION_TRACE ("acpi_enable");
/* Make sure we have the FADT*/
if (!acpi_gbl_FADT) {
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
}
else {
/* Transition to ACPI mode */
status = acpi_hw_set_mode (ACPI_SYS_MODE_ACPI);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n"));
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"Transition to ACPI mode successful\n"));
}
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* 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 (!acpi_gbl_FADT) {
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
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_DEBUG_PRINT ((ACPI_DB_ERROR,
"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);
}
/*******************************************************************************
*
* 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_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
1, ACPI_MTX_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Make sure that the hardware responded */
status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
&value, ACPI_MTX_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
if (value != 1) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not enable %s event\n", acpi_ut_get_event_name (event)));
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
}
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_enable_event);
/*******************************************************************************
*
* FUNCTION: acpi_set_gpe_type
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* Type - New GPE type
*
* RETURN: Status
*
* DESCRIPTION: Set the type of an individual GPE
*
******************************************************************************/
acpi_status
acpi_set_gpe_type (
acpi_handle gpe_device,
u32 gpe_number,
u8 type)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE ("acpi_set_gpe_type");
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
return_ACPI_STATUS (AE_OK);
}
/* Set the new type (will disable GPE if currently enabled) */
status = acpi_ev_set_gpe_type (gpe_event_info, type);
unlock_and_exit:
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_set_gpe_type);
/*******************************************************************************
*
* FUNCTION: acpi_enable_gpe
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* Flags - Just enable, or also wake enable?
* Called from ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Enable an ACPI event (general purpose)
*
******************************************************************************/
acpi_status
acpi_enable_gpe (
acpi_handle gpe_device,
u32 gpe_number,
u32 flags)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE ("acpi_enable_gpe");
/* Use semaphore lock if not executing at interrupt level */
if (flags & ACPI_NOT_ISR) {
status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/* Perform the enable */
status = acpi_ev_enable_gpe (gpe_event_info, TRUE);
unlock_and_exit:
if (flags & ACPI_NOT_ISR) {
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
}
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_enable_gpe);
/*******************************************************************************
*
* FUNCTION: acpi_disable_gpe
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* Flags - Just disable, or also wake disable?
* Called from ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Disable an ACPI event (general purpose)
*
******************************************************************************/
acpi_status
acpi_disable_gpe (
acpi_handle gpe_device,
u32 gpe_number,
u32 flags)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE ("acpi_disable_gpe");
/* Use semaphore lock if not executing at interrupt level */
if (flags & ACPI_NOT_ISR) {
status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
status = acpi_ev_disable_gpe (gpe_event_info);
unlock_and_exit:
if (flags & ACPI_NOT_ISR) {
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
}
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_disable_event
*
* PARAMETERS: Event - The fixed eventto be enabled
* 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_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
0, ACPI_MTX_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
&value, ACPI_MTX_LOCK);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
if (value != 0) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not disable %s events\n", acpi_ut_get_event_name (event)));
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
}
return_ACPI_STATUS (status);
}
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_set_register (acpi_gbl_fixed_event_info[event].status_register_id,
1, ACPI_MTX_LOCK);
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_clear_event);
/*******************************************************************************
*
* FUNCTION: acpi_clear_gpe
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* Flags - Called from an ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (general purpose)
*
******************************************************************************/
acpi_status
acpi_clear_gpe (
acpi_handle gpe_device,
u32 gpe_number,
u32 flags)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE ("acpi_clear_gpe");
/* Use semaphore lock if not executing at interrupt level */
if (flags & ACPI_NOT_ISR) {
status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
status = acpi_hw_clear_gpe (gpe_event_info);
unlock_and_exit:
if (flags & ACPI_NOT_ISR) {
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
}
return_ACPI_STATUS (status);
}
#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
*
* 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 = AE_OK;
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);
}
/* Get the status of the requested fixed event */
status = acpi_get_register (acpi_gbl_fixed_event_info[event].status_register_id,
event_status, ACPI_MTX_LOCK);
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_get_gpe_status
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* Flags - Called from an ISR or not
* event_status - Where the current status of the event will
* be returned
*
* RETURN: Status
*
* DESCRIPTION: Get status of an event (general purpose)
*
******************************************************************************/
acpi_status
acpi_get_gpe_status (
acpi_handle gpe_device,
u32 gpe_number,
u32 flags,
acpi_event_status *event_status)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE ("acpi_get_gpe_status");
/* Use semaphore lock if not executing at interrupt level */
if (flags & ACPI_NOT_ISR) {
status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/* Obtain status on the requested GPE number */
status = acpi_hw_get_gpe_status (gpe_event_info, event_status);
unlock_and_exit:
if (flags & ACPI_NOT_ISR) {
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
}
return_ACPI_STATUS (status);
}
#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* FUNCTION: acpi_install_gpe_block
*
* PARAMETERS: gpe_device - Handle to the parent GPE Block Device
* gpe_block_address - Address and space_iD
* register_count - Number of GPE register pairs in the block
* interrupt_number - H/W interrupt for the block
*
* RETURN: Status
*
* DESCRIPTION: Create and Install a block of GPE registers
*
******************************************************************************/
acpi_status
acpi_install_gpe_block (
acpi_handle gpe_device,
struct acpi_generic_address *gpe_block_address,
u32 register_count,
u32 interrupt_number)
{
acpi_status status;
union acpi_operand_object *obj_desc;
struct acpi_namespace_node *node;
struct acpi_gpe_block_info *gpe_block;
ACPI_FUNCTION_TRACE ("acpi_install_gpe_block");
if ((!gpe_device) ||
(!gpe_block_address) ||
(!register_count)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status)) {
return (status);
}
node = acpi_ns_map_handle_to_node (gpe_device);
if (!node) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/*
* For user-installed GPE Block Devices, the gpe_block_base_number
* is always zero
*/
status = acpi_ev_create_gpe_block (node, gpe_block_address, register_count,
0, interrupt_number, &gpe_block);
if (ACPI_FAILURE (status)) {
goto unlock_and_exit;
}
/* Get the device_object attached to the node */
obj_desc = acpi_ns_get_attached_object (node);
if (!obj_desc) {
/* No object, create a new one */
obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_DEVICE);
if (!obj_desc) {
status = AE_NO_MEMORY;
goto unlock_and_exit;
}
status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_DEVICE);
/* Remove local reference to the object */
acpi_ut_remove_reference (obj_desc);
if (ACPI_FAILURE (status)) {
goto unlock_and_exit;
}
}
/* Install the GPE block in the device_object */
obj_desc->device.gpe_block = gpe_block;
unlock_and_exit:
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_install_gpe_block);
/*******************************************************************************
*
* FUNCTION: acpi_remove_gpe_block
*
* PARAMETERS: gpe_device - Handle to the parent GPE Block Device
*
* RETURN: Status
*
* DESCRIPTION: Remove a previously installed block of GPE registers
*
******************************************************************************/
acpi_status
acpi_remove_gpe_block (
acpi_handle gpe_device)
{
union acpi_operand_object *obj_desc;
acpi_status status;
struct acpi_namespace_node *node;
ACPI_FUNCTION_TRACE ("acpi_remove_gpe_block");
if (!gpe_device) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status)) {
return (status);
}
node = acpi_ns_map_handle_to_node (gpe_device);
if (!node) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/* Get the device_object attached to the node */
obj_desc = acpi_ns_get_attached_object (node);
if (!obj_desc ||
!obj_desc->device.gpe_block) {
return_ACPI_STATUS (AE_NULL_OBJECT);
}
/* Delete the GPE block (but not the device_object) */
status = acpi_ev_delete_gpe_block (obj_desc->device.gpe_block);
if (ACPI_SUCCESS (status)) {
obj_desc->device.gpe_block = NULL;
}
unlock_and_exit:
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_remove_gpe_block);
