719 lines
19 KiB
C
719 lines
19 KiB
C
/******************************************************************************
|
|
*
|
|
* 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);
|