1 files changed, 262 insertions, 0 deletions

diff --git a/drivers/acpi/namespace/nsxfobj.c b/drivers/acpi/namespace/nsxfobj.c
new file mode 100644
index 000000000000..19acf32674b9
--- /dev/null
+++ b/drivers/acpi/namespace/nsxfobj.c
@@ -0,0 +1,262 @@
+/*******************************************************************************
+ *
+ * Module Name: nsxfobj - Public interfaces to the ACPI subsystem
+ *                         ACPI Object oriented interfaces
+ *
+ ******************************************************************************/
+
+/*
+ * 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/acnamesp.h>
+
+
+#define _COMPONENT          ACPI_NAMESPACE
+         ACPI_MODULE_NAME    ("nsxfobj")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_type
+ *
+ * PARAMETERS:  Handle          - Handle of object whose type is desired
+ *              *ret_type       - Where the type will be placed
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This routine returns the type associatd with a particular handle
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_type (
+        acpi_handle                     handle,
+        acpi_object_type                *ret_type)
+{
+        struct acpi_namespace_node      *node;
+        acpi_status                     status;
+
+
+        /* Parameter Validation */
+
+        if (!ret_type) {
+                return (AE_BAD_PARAMETER);
+        }
+
+        /*
+         * Special case for the predefined Root Node
+         * (return type ANY)
+         */
+        if (handle == ACPI_ROOT_OBJECT) {
+                *ret_type = ACPI_TYPE_ANY;
+                return (AE_OK);
+        }
+
+        status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE (status)) {
+                return (status);
+        }
+
+        /* Convert and validate the handle */
+
+        node = acpi_ns_map_handle_to_node (handle);
+        if (!node) {
+                (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+                return (AE_BAD_PARAMETER);
+        }
+
+        *ret_type = node->type;
+
+
+        status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+        return (status);
+}
+EXPORT_SYMBOL(acpi_get_type);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_parent
+ *
+ * PARAMETERS:  Handle          - Handle of object whose parent is desired
+ *              ret_handle      - Where the parent handle will be placed
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Returns a handle to the parent of the object represented by
+ *              Handle.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_parent (
+        acpi_handle                     handle,
+        acpi_handle                     *ret_handle)
+{
+        struct acpi_namespace_node      *node;
+        acpi_status                     status;
+
+
+        if (!ret_handle) {
+                return (AE_BAD_PARAMETER);
+        }
+
+        /* Special case for the predefined Root Node (no parent) */
+
+        if (handle == ACPI_ROOT_OBJECT) {
+                return (AE_NULL_ENTRY);
+        }
+
+        status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE (status)) {
+                return (status);
+        }
+
+        /* Convert and validate the handle */
+
+        node = acpi_ns_map_handle_to_node (handle);
+        if (!node) {
+                status = AE_BAD_PARAMETER;
+                goto unlock_and_exit;
+        }
+
+        /* Get the parent entry */
+
+        *ret_handle =
+                acpi_ns_convert_entry_to_handle (acpi_ns_get_parent_node (node));
+
+        /* Return exception if parent is null */
+
+        if (!acpi_ns_get_parent_node (node)) {
+                status = AE_NULL_ENTRY;
+        }
+
+
+unlock_and_exit:
+
+        (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+        return (status);
+}
+EXPORT_SYMBOL(acpi_get_parent);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_next_object
+ *
+ * PARAMETERS:  Type            - Type of object to be searched for
+ *              Parent          - Parent object whose children we are getting
+ *              last_child      - Previous child that was found.
+ *                                The NEXT child will be returned
+ *              ret_handle      - Where handle to the next object is placed
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Return the next peer object within the namespace.  If Handle is
+ *              valid, Scope is ignored.  Otherwise, the first object within
+ *              Scope is returned.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_next_object (
+        acpi_object_type                type,
+        acpi_handle                     parent,
+        acpi_handle                     child,
+        acpi_handle                     *ret_handle)
+{
+        acpi_status                     status;
+        struct acpi_namespace_node      *node;
+        struct acpi_namespace_node      *parent_node = NULL;
+        struct acpi_namespace_node      *child_node = NULL;
+
+
+        /* Parameter validation */
+
+        if (type > ACPI_TYPE_EXTERNAL_MAX) {
+                return (AE_BAD_PARAMETER);
+        }
+
+        status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE (status)) {
+                return (status);
+        }
+
+        /* If null handle, use the parent */
+
+        if (!child) {
+                /* Start search at the beginning of the specified scope */
+
+                parent_node = acpi_ns_map_handle_to_node (parent);
+                if (!parent_node) {
+                        status = AE_BAD_PARAMETER;
+                        goto unlock_and_exit;
+                }
+        }
+        else {
+                /* Non-null handle, ignore the parent */
+                /* Convert and validate the handle */
+
+                child_node = acpi_ns_map_handle_to_node (child);
+                if (!child_node) {
+                        status = AE_BAD_PARAMETER;
+                        goto unlock_and_exit;
+                }
+        }
+
+        /* Internal function does the real work */
+
+        node = acpi_ns_get_next_node (type, parent_node, child_node);
+        if (!node) {
+                status = AE_NOT_FOUND;
+                goto unlock_and_exit;
+        }
+
+        if (ret_handle) {
+                *ret_handle = acpi_ns_convert_entry_to_handle (node);
+        }
+
+
+unlock_and_exit:
+
+        (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+        return (status);
+}
+EXPORT_SYMBOL(acpi_get_next_object);
+