zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/acpi/acpica/evxface.c b/ap/os/linux/linux-3.4.x/drivers/acpi/acpica/evxface.c
new file mode 100644
index 0000000..44bef57
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/acpi/acpica/evxface.c
@@ -0,0 +1,990 @@
+/******************************************************************************
+ *
+ * Module Name: evxface - External interfaces for ACPI events
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, 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.
+ */
+
+#include <linux/export.h>
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+#include "acevents.h"
+#include "acinterp.h"
+
+#define _COMPONENT ACPI_EVENTS
+ACPI_MODULE_NAME("evxface")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_populate_handler_object
+ *
+ * PARAMETERS: handler_obj - Handler object to populate
+ * handler_type - The type of handler:
+ * ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
+ * ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
+ * ACPI_ALL_NOTIFY: both system and device
+ * handler - Address of the handler
+ * context - Value passed to the handler on each GPE
+ * next - Address of a handler object to link to
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Populate a handler object.
+ *
+ ******************************************************************************/
+static void
+acpi_populate_handler_object(struct acpi_object_notify_handler *handler_obj,
+ u32 handler_type,
+ acpi_notify_handler handler, void *context,
+ struct acpi_object_notify_handler *next)
+{
+ handler_obj->handler_type = handler_type;
+ handler_obj->handler = handler;
+ handler_obj->context = context;
+ handler_obj->next = next;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_add_handler_object
+ *
+ * PARAMETERS: parent_obj - Parent of the new object
+ * handler - Address of the handler
+ * context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new handler object and populate it.
+ *
+ ******************************************************************************/
+static acpi_status
+acpi_add_handler_object(struct acpi_object_notify_handler *parent_obj,
+ acpi_notify_handler handler, void *context)
+{
+ struct acpi_object_notify_handler *handler_obj;
+
+ /* The parent must not be a defice notify handler object. */
+ if (parent_obj->handler_type & ACPI_DEVICE_NOTIFY)
+ return AE_BAD_PARAMETER;
+
+ handler_obj = ACPI_ALLOCATE_ZEROED(sizeof(*handler_obj));
+ if (!handler_obj)
+ return AE_NO_MEMORY;
+
+ acpi_populate_handler_object(handler_obj,
+ ACPI_SYSTEM_NOTIFY,
+ handler, context,
+ parent_obj->next);
+ parent_obj->next = handler_obj;
+
+ return AE_OK;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_notify_handler
+ *
+ * PARAMETERS: Device - The device for which notifies will be handled
+ * handler_type - The type of handler:
+ * ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
+ * ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
+ * ACPI_ALL_NOTIFY: both system and device
+ * Handler - Address of the handler
+ * Context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Install a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_notify_handler(acpi_handle device,
+ u32 handler_type,
+ acpi_notify_handler handler, void *context)
+{
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object *notify_obj;
+ struct acpi_namespace_node *node;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_install_notify_handler);
+
+ /* Parameter validation */
+
+ if ((!device) ||
+ (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Convert and validate the device handle */
+
+ node = acpi_ns_validate_handle(device);
+ if (!node) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /*
+ * Root Object:
+ * Registering a notify handler on the root object indicates that the
+ * caller wishes to receive notifications for all objects. Note that
+ * only one <external> global handler can be regsitered (per notify type).
+ */
+ if (device == ACPI_ROOT_OBJECT) {
+
+ /* Make sure the handler is not already installed */
+
+ if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
+ acpi_gbl_system_notify.handler) ||
+ ((handler_type & ACPI_DEVICE_NOTIFY) &&
+ acpi_gbl_device_notify.handler)) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
+ if (handler_type & ACPI_SYSTEM_NOTIFY) {
+ acpi_gbl_system_notify.node = node;
+ acpi_gbl_system_notify.handler = handler;
+ acpi_gbl_system_notify.context = context;
+ }
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ acpi_gbl_device_notify.node = node;
+ acpi_gbl_device_notify.handler = handler;
+ acpi_gbl_device_notify.context = context;
+ }
+
+ /* Global notify handler installed */
+ }
+
+ /*
+ * All Other Objects:
+ * Caller will only receive notifications specific to the target object.
+ * Note that only certain object types can receive notifications.
+ */
+ else {
+ /* Notifies allowed on this object? */
+
+ if (!acpi_ev_is_notify_object(node)) {
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
+ /* Check for an existing internal object */
+
+ obj_desc = acpi_ns_get_attached_object(node);
+ if (obj_desc) {
+
+ /* Object exists. */
+
+ /* For a device notify, make sure there's no handler. */
+ if ((handler_type & ACPI_DEVICE_NOTIFY) &&
+ obj_desc->common_notify.device_notify) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
+ /* System notifies may have more handlers installed. */
+ notify_obj = obj_desc->common_notify.system_notify;
+
+ if ((handler_type & ACPI_SYSTEM_NOTIFY) && notify_obj) {
+ struct acpi_object_notify_handler *parent_obj;
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
+ parent_obj = ¬ify_obj->notify;
+ status = acpi_add_handler_object(parent_obj,
+ handler,
+ context);
+ goto unlock_and_exit;
+ }
+ } else {
+ /* Create a new object */
+
+ obj_desc = acpi_ut_create_internal_object(node->type);
+ if (!obj_desc) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ /* Attach new object to the Node */
+
+ status =
+ acpi_ns_attach_object(device, obj_desc, node->type);
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference(obj_desc);
+ if (ACPI_FAILURE(status)) {
+ goto unlock_and_exit;
+ }
+ }
+
+ /* Install the handler */
+
+ notify_obj =
+ acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY);
+ if (!notify_obj) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ acpi_populate_handler_object(¬ify_obj->notify,
+ handler_type,
+ handler, context,
+ NULL);
+
+ if (handler_type & ACPI_SYSTEM_NOTIFY) {
+ obj_desc->common_notify.system_notify = notify_obj;
+ }
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ obj_desc->common_notify.device_notify = notify_obj;
+ }
+
+ if (handler_type == ACPI_ALL_NOTIFY) {
+
+ /* Extra ref if installed in both */
+
+ acpi_ut_add_reference(notify_obj);
+ }
+ }
+
+ unlock_and_exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_notify_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_notify_handler
+ *
+ * PARAMETERS: Device - The device for which notifies will be handled
+ * handler_type - The type of handler:
+ * ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
+ * ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
+ * ACPI_ALL_NOTIFY: both system and device
+ * Handler - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Remove a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_notify_handler(acpi_handle device,
+ u32 handler_type, acpi_notify_handler handler)
+{
+ union acpi_operand_object *notify_obj;
+ union acpi_operand_object *obj_desc;
+ struct acpi_namespace_node *node;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_remove_notify_handler);
+
+ /* Parameter validation */
+
+ if ((!device) ||
+ (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+ status = AE_BAD_PARAMETER;
+ goto exit;
+ }
+
+
+ /* Make sure all deferred tasks are completed */
+ acpi_os_wait_events_complete(NULL);
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Convert and validate the device handle */
+
+ node = acpi_ns_validate_handle(device);
+ if (!node) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Root Object */
+
+ if (device == ACPI_ROOT_OBJECT) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Removing notify handler for namespace root object\n"));
+
+ if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
+ !acpi_gbl_system_notify.handler) ||
+ ((handler_type & ACPI_DEVICE_NOTIFY) &&
+ !acpi_gbl_device_notify.handler)) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ if (handler_type & ACPI_SYSTEM_NOTIFY) {
+ acpi_gbl_system_notify.node = NULL;
+ acpi_gbl_system_notify.handler = NULL;
+ acpi_gbl_system_notify.context = NULL;
+ }
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ acpi_gbl_device_notify.node = NULL;
+ acpi_gbl_device_notify.handler = NULL;
+ acpi_gbl_device_notify.context = NULL;
+ }
+ }
+
+ /* All Other Objects */
+
+ else {
+ /* Notifies allowed on this object? */
+
+ if (!acpi_ev_is_notify_object(node)) {
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
+ /* Check for an existing internal object */
+
+ obj_desc = acpi_ns_get_attached_object(node);
+ if (!obj_desc) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ /* Object exists - make sure there's an existing handler */
+
+ if (handler_type & ACPI_SYSTEM_NOTIFY) {
+ struct acpi_object_notify_handler *handler_obj;
+ struct acpi_object_notify_handler *parent_obj;
+
+ notify_obj = obj_desc->common_notify.system_notify;
+ if (!notify_obj) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ handler_obj = ¬ify_obj->notify;
+ parent_obj = NULL;
+ while (handler_obj->handler != handler) {
+ if (handler_obj->next) {
+ parent_obj = handler_obj;
+ handler_obj = handler_obj->next;
+ } else {
+ break;
+ }
+ }
+
+ if (handler_obj->handler != handler) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /*
+ * Remove the handler. There are three possible cases.
+ * First, we may need to remove a non-embedded object.
+ * Second, we may need to remove the embedded object's
+ * handler data, while non-embedded objects exist.
+ * Finally, we may need to remove the embedded object
+ * entirely along with its container.
+ */
+ if (parent_obj) {
+ /* Non-embedded object is being removed. */
+ parent_obj->next = handler_obj->next;
+ ACPI_FREE(handler_obj);
+ } else if (notify_obj->notify.next) {
+ /*
+ * The handler matches the embedded object, but
+ * there are more handler objects in the list.
+ * Replace the embedded object's data with the
+ * first next object's data and remove that
+ * object.
+ */
+ parent_obj = ¬ify_obj->notify;
+ handler_obj = notify_obj->notify.next;
+ *parent_obj = *handler_obj;
+ ACPI_FREE(handler_obj);
+ } else {
+ /* No more handler objects in the list. */
+ obj_desc->common_notify.system_notify = NULL;
+ acpi_ut_remove_reference(notify_obj);
+ }
+ }
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ notify_obj = obj_desc->common_notify.device_notify;
+ if (!notify_obj) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ if (notify_obj->notify.handler != handler) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Remove the handler */
+ obj_desc->common_notify.device_notify = NULL;
+ acpi_ut_remove_reference(notify_obj);
+ }
+ }
+
+ unlock_and_exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ exit:
+ if (ACPI_FAILURE(status))
+ ACPI_EXCEPTION((AE_INFO, status, "Removing notify handler"));
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_exception_handler
+ *
+ * PARAMETERS: Handler - Pointer to the handler function for the
+ * event
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
+{
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_install_exception_handler);
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Don't allow two handlers. */
+
+ if (acpi_gbl_exception_handler) {
+ status = AE_ALREADY_EXISTS;
+ goto cleanup;
+ }
+
+ /* Install the handler */
+
+ acpi_gbl_exception_handler = handler;
+
+ cleanup:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
+#endif /* ACPI_FUTURE_USAGE */
+
+#if (!ACPI_REDUCED_HARDWARE)
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_global_event_handler
+ *
+ * PARAMETERS: Handler - Pointer to the global event handler function
+ * Context - Value passed to the handler on each event
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function. The global handler
+ * is invoked upon each incoming GPE and Fixed Event. It is
+ * invoked at interrupt level at the time of the event dispatch.
+ * Can be used to update event counters, etc.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_global_event_handler(ACPI_GBL_EVENT_HANDLER handler, void *context)
+{
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_install_global_event_handler);
+
+ /* Parameter validation */
+
+ if (!handler) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Don't allow two handlers. */
+
+ if (acpi_gbl_global_event_handler) {
+ status = AE_ALREADY_EXISTS;
+ goto cleanup;
+ }
+
+ acpi_gbl_global_event_handler = handler;
+ acpi_gbl_global_event_handler_context = context;
+
+ cleanup:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_fixed_event_handler
+ *
+ * PARAMETERS: Event - Event type to enable.
+ * Handler - Pointer to the handler function for the
+ * event
+ * Context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function and then enables the
+ * event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_fixed_event_handler(u32 event,
+ acpi_event_handler handler, void *context)
+{
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler);
+
+ /* Parameter validation */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Don't allow two handlers. */
+
+ if (NULL != acpi_gbl_fixed_event_handlers[event].handler) {
+ status = AE_ALREADY_EXISTS;
+ goto cleanup;
+ }
+
+ /* Install the handler before enabling the event */
+
+ acpi_gbl_fixed_event_handlers[event].handler = handler;
+ acpi_gbl_fixed_event_handlers[event].context = context;
+
+ status = acpi_clear_event(event);
+ if (ACPI_SUCCESS(status))
+ status = acpi_enable_event(event, 0);
+ if (ACPI_FAILURE(status)) {
+ ACPI_WARNING((AE_INFO, "Could not enable fixed event 0x%X",
+ event));
+
+ /* Remove the handler */
+
+ acpi_gbl_fixed_event_handlers[event].handler = NULL;
+ acpi_gbl_fixed_event_handlers[event].context = NULL;
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Enabled fixed event %X, Handler=%p\n", event,
+ handler));
+ }
+
+ cleanup:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_fixed_event_handler
+ *
+ * PARAMETERS: Event - Event type to disable.
+ * Handler - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Disables the event and unregisters the event handler.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler);
+
+ /* Parameter validation */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Disable the event before removing the handler */
+
+ status = acpi_disable_event(event, 0);
+
+ /* Always Remove the handler */
+
+ acpi_gbl_fixed_event_handlers[event].handler = NULL;
+ acpi_gbl_fixed_event_handlers[event].context = NULL;
+
+ if (ACPI_FAILURE(status)) {
+ ACPI_WARNING((AE_INFO,
+ "Could not write to fixed event enable register 0x%X",
+ event));
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabled fixed event %X\n",
+ event));
+ }
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_gpe_handler
+ *
+ * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
+ * defined GPEs)
+ * gpe_number - The GPE number within the GPE block
+ * Type - Whether this GPE should be treated as an
+ * edge- or level-triggered interrupt.
+ * Address - Address of the handler
+ * Context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_gpe_handler(acpi_handle gpe_device,
+ u32 gpe_number,
+ u32 type, acpi_gpe_handler address, void *context)
+{
+ struct acpi_gpe_event_info *gpe_event_info;
+ struct acpi_gpe_handler_info *handler;
+ acpi_status status;
+ acpi_cpu_flags flags;
+
+ ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
+
+ /* Parameter validation */
+
+ if ((!address) || (type & ~ACPI_GPE_XRUPT_TYPE_MASK)) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Allocate memory for the handler object */
+
+ handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_handler_info));
+ if (!handler) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+ /* 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 free_and_exit;
+ }
+
+ /* Make sure that there isn't a handler there already */
+
+ if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+ ACPI_GPE_DISPATCH_HANDLER) {
+ status = AE_ALREADY_EXISTS;
+ goto free_and_exit;
+ }
+
+ /* Allocate and init handler object */
+
+ handler->address = address;
+ handler->context = context;
+ handler->method_node = gpe_event_info->dispatch.method_node;
+ handler->original_flags = gpe_event_info->flags &
+ (ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+
+ /*
+ * If the GPE is associated with a method, it might have been enabled
+ * automatically during initialization, in which case it has to be
+ * disabled now to avoid spurious execution of the handler.
+ */
+
+ if ((handler->original_flags & ACPI_GPE_DISPATCH_METHOD)
+ && gpe_event_info->runtime_count) {
+ handler->originally_enabled = 1;
+ (void)acpi_ev_remove_gpe_reference(gpe_event_info);
+ }
+
+ /* Install the handler */
+
+ gpe_event_info->dispatch.handler = handler;
+
+ /* Setup up dispatch flags to indicate handler (vs. method) */
+
+ gpe_event_info->flags &=
+ ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+ gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER);
+
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+unlock_and_exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+
+free_and_exit:
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ ACPI_FREE(handler);
+ goto unlock_and_exit;
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_gpe_handler
+ *
+ * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
+ * defined GPEs)
+ * gpe_number - The event to remove a handler
+ * Address - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Remove a handler for a General Purpose acpi_event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_gpe_handler(acpi_handle gpe_device,
+ u32 gpe_number, acpi_gpe_handler address)
+{
+ struct acpi_gpe_event_info *gpe_event_info;
+ struct acpi_gpe_handler_info *handler;
+ acpi_status status;
+ acpi_cpu_flags flags;
+
+ ACPI_FUNCTION_TRACE(acpi_remove_gpe_handler);
+
+ /* Parameter validation */
+
+ if (!address) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ /* Make sure all deferred tasks are completed */
+
+ acpi_os_wait_events_complete(NULL);
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+ /* 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;
+ }
+
+ /* Make sure that a handler is indeed installed */
+
+ if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) !=
+ ACPI_GPE_DISPATCH_HANDLER) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ /* Make sure that the installed handler is the same */
+
+ if (gpe_event_info->dispatch.handler->address != address) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Remove the handler */
+
+ handler = gpe_event_info->dispatch.handler;
+
+ /* Restore Method node (if any), set dispatch flags */
+
+ gpe_event_info->dispatch.method_node = handler->method_node;
+ gpe_event_info->flags &=
+ ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+ gpe_event_info->flags |= handler->original_flags;
+
+ /*
+ * If the GPE was previously associated with a method and it was
+ * enabled, it should be enabled at this point to restore the
+ * post-initialization configuration.
+ */
+
+ if ((handler->original_flags & ACPI_GPE_DISPATCH_METHOD)
+ && handler->originally_enabled)
+ (void)acpi_ev_add_gpe_reference(gpe_event_info);
+
+ /* Now we can free the handler object */
+
+ ACPI_FREE(handler);
+
+unlock_and_exit:
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_acquire_global_lock
+ *
+ * PARAMETERS: Timeout - How long the caller is willing to wait
+ * Handle - Where the handle to the lock is returned
+ * (if acquired)
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Acquire the ACPI Global Lock
+ *
+ * Note: Allows callers with the same thread ID to acquire the global lock
+ * multiple times. In other words, externally, the behavior of the global lock
+ * is identical to an AML mutex. On the first acquire, a new handle is
+ * returned. On any subsequent calls to acquire by the same thread, the same
+ * handle is returned.
+ *
+ ******************************************************************************/
+acpi_status acpi_acquire_global_lock(u16 timeout, u32 * handle)
+{
+ acpi_status status;
+
+ if (!handle) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ /* Must lock interpreter to prevent race conditions */
+
+ acpi_ex_enter_interpreter();
+
+ status = acpi_ex_acquire_mutex_object(timeout,
+ acpi_gbl_global_lock_mutex,
+ acpi_os_get_thread_id());
+
+ if (ACPI_SUCCESS(status)) {
+
+ /* Return the global lock handle (updated in acpi_ev_acquire_global_lock) */
+
+ *handle = acpi_gbl_global_lock_handle;
+ }
+
+ acpi_ex_exit_interpreter();
+ return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_release_global_lock
+ *
+ * PARAMETERS: Handle - Returned from acpi_acquire_global_lock
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid.
+ *
+ ******************************************************************************/
+acpi_status acpi_release_global_lock(u32 handle)
+{
+ acpi_status status;
+
+ if (!handle || (handle != acpi_gbl_global_lock_handle)) {
+ return (AE_NOT_ACQUIRED);
+ }
+
+ status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);
+ return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_release_global_lock)
+#endif /* !ACPI_REDUCED_HARDWARE */