1 files changed, 369 insertions, 0 deletions

diff --git a/drivers/acpi/namespace/nsxfname.c b/drivers/acpi/namespace/nsxfname.c
new file mode 100644
index 000000000000..f2405efd1b9a
--- /dev/null
+++ b/drivers/acpi/namespace/nsxfname.c
@@ -0,0 +1,369 @@
+/******************************************************************************
+ *
+ * Module Name: nsxfname - Public interfaces to the ACPI subsystem
+ *                         ACPI Namespace 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    ("nsxfname")
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_handle
+ *
+ * PARAMETERS:  Parent          - Object to search under (search scope).
+ *              path_name       - Pointer to an asciiz string containing the
+ *                                  name
+ *              ret_handle      - Where the return handle is placed
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This routine will search for a caller specified name in the
+ *              name space.  The caller can restrict the search region by
+ *              specifying a non NULL parent.  The parent value is itself a
+ *              namespace handle.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_handle (
+        acpi_handle                     parent,
+        acpi_string                     pathname,
+        acpi_handle                     *ret_handle)
+{
+        acpi_status                     status;
+        struct acpi_namespace_node      *node = NULL;
+        struct acpi_namespace_node      *prefix_node = NULL;
+
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        /* Parameter Validation */
+
+        if (!ret_handle || !pathname) {
+                return (AE_BAD_PARAMETER);
+        }
+
+        /* Convert a parent handle to a prefix node */
+
+        if (parent) {
+                status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+                if (ACPI_FAILURE (status)) {
+                        return (status);
+                }
+
+                prefix_node = acpi_ns_map_handle_to_node (parent);
+                if (!prefix_node) {
+                        (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+                        return (AE_BAD_PARAMETER);
+                }
+
+                status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+                if (ACPI_FAILURE (status)) {
+                        return (status);
+                }
+        }
+
+        /* Special case for root, since we can't search for it */
+
+        if (ACPI_STRCMP (pathname, ACPI_NS_ROOT_PATH) == 0) {
+                *ret_handle = acpi_ns_convert_entry_to_handle (acpi_gbl_root_node);
+                return (AE_OK);
+        }
+
+        /*
+         *  Find the Node and convert to a handle
+         */
+        status = acpi_ns_get_node_by_path (pathname, prefix_node, ACPI_NS_NO_UPSEARCH,
+                          &node);
+
+        *ret_handle = NULL;
+        if (ACPI_SUCCESS (status)) {
+                *ret_handle = acpi_ns_convert_entry_to_handle (node);
+        }
+
+        return (status);
+}
+EXPORT_SYMBOL(acpi_get_handle);
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_name
+ *
+ * PARAMETERS:  Handle          - Handle to be converted to a pathname
+ *              name_type       - Full pathname or single segment
+ *              Buffer          - Buffer for returned path
+ *
+ * RETURN:      Pointer to a string containing the fully qualified Name.
+ *
+ * DESCRIPTION: This routine returns the fully qualified name associated with
+ *              the Handle parameter.  This and the acpi_pathname_to_handle are
+ *              complementary functions.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_name (
+        acpi_handle                     handle,
+        u32                             name_type,
+        struct acpi_buffer              *buffer)
+{
+        acpi_status                     status;
+        struct acpi_namespace_node      *node;
+
+
+        /* Parameter validation */
+
+        if (name_type > ACPI_NAME_TYPE_MAX) {
+                return (AE_BAD_PARAMETER);
+        }
+
+        status = acpi_ut_validate_buffer (buffer);
+        if (ACPI_FAILURE (status)) {
+                return (status);
+        }
+
+        if (name_type == ACPI_FULL_PATHNAME) {
+                /* Get the full pathname (From the namespace root) */
+
+                status = acpi_ns_handle_to_pathname (handle, buffer);
+                return (status);
+        }
+
+        /*
+         * Wants the single segment ACPI name.
+         * Validate handle and convert to a namespace Node
+         */
+        status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE (status)) {
+                return (status);
+        }
+
+        node = acpi_ns_map_handle_to_node (handle);
+        if (!node) {
+                status = AE_BAD_PARAMETER;
+                goto unlock_and_exit;
+        }
+
+        /* Validate/Allocate/Clear caller buffer */
+
+        status = acpi_ut_initialize_buffer (buffer, ACPI_PATH_SEGMENT_LENGTH);
+        if (ACPI_FAILURE (status)) {
+                goto unlock_and_exit;
+        }
+
+        /* Just copy the ACPI name from the Node and zero terminate it */
+
+        ACPI_STRNCPY (buffer->pointer, acpi_ut_get_node_name (node),
+                         ACPI_NAME_SIZE);
+        ((char *) buffer->pointer) [ACPI_NAME_SIZE] = 0;
+        status = AE_OK;
+
+
+unlock_and_exit:
+
+        (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+        return (status);
+}
+EXPORT_SYMBOL(acpi_get_name);
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_object_info
+ *
+ * PARAMETERS:  Handle          - Object Handle
+ *              Info            - Where the info is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Returns information about an object as gleaned from the
+ *              namespace node and possibly by running several standard
+ *              control methods (Such as in the case of a device.)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_object_info (
+        acpi_handle                     handle,
+        struct acpi_buffer              *buffer)
+{
+        acpi_status                     status;
+        struct acpi_namespace_node      *node;
+        struct acpi_device_info         *info;
+        struct acpi_device_info         *return_info;
+        struct acpi_compatible_id_list *cid_list = NULL;
+        acpi_size                       size;
+
+
+        /* Parameter validation */
+
+        if (!handle || !buffer) {
+                return (AE_BAD_PARAMETER);
+        }
+
+        status = acpi_ut_validate_buffer (buffer);
+        if (ACPI_FAILURE (status)) {
+                return (status);
+        }
+
+        info = ACPI_MEM_CALLOCATE (sizeof (struct acpi_device_info));
+        if (!info) {
+                return (AE_NO_MEMORY);
+        }
+
+        status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE (status)) {
+                goto cleanup;
+        }
+
+        node = acpi_ns_map_handle_to_node (handle);
+        if (!node) {
+                (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+                goto cleanup;
+        }
+
+        /* Init return structure */
+
+        size = sizeof (struct acpi_device_info);
+
+        info->type  = node->type;
+        info->name  = node->name.integer;
+        info->valid = 0;
+
+        status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE (status)) {
+                goto cleanup;
+        }
+
+        /* If not a device, we are all done */
+
+        if (info->type == ACPI_TYPE_DEVICE) {
+                /*
+                 * Get extra info for ACPI Devices objects only:
+                 * Run the Device _HID, _UID, _CID, _STA, _ADR and _sx_d methods.
+                 *
+                 * Note: none of these methods are required, so they may or may
+                 * not be present for this device.  The Info->Valid bitfield is used
+                 * to indicate which methods were found and ran successfully.
+                 */
+
+                /* Execute the Device._HID method */
+
+                status = acpi_ut_execute_HID (node, &info->hardware_id);
+                if (ACPI_SUCCESS (status)) {
+                        info->valid |= ACPI_VALID_HID;
+                }
+
+                /* Execute the Device._UID method */
+
+                status = acpi_ut_execute_UID (node, &info->unique_id);
+                if (ACPI_SUCCESS (status)) {
+                        info->valid |= ACPI_VALID_UID;
+                }
+
+                /* Execute the Device._CID method */
+
+                status = acpi_ut_execute_CID (node, &cid_list);
+                if (ACPI_SUCCESS (status)) {
+                        size += ((acpi_size) cid_list->count - 1) *
+                                         sizeof (struct acpi_compatible_id);
+                        info->valid |= ACPI_VALID_CID;
+                }
+
+                /* Execute the Device._STA method */
+
+                status = acpi_ut_execute_STA (node, &info->current_status);
+                if (ACPI_SUCCESS (status)) {
+                        info->valid |= ACPI_VALID_STA;
+                }
+
+                /* Execute the Device._ADR method */
+
+                status = acpi_ut_evaluate_numeric_object (METHOD_NAME__ADR, node,
+                                  &info->address);
+                if (ACPI_SUCCESS (status)) {
+                        info->valid |= ACPI_VALID_ADR;
+                }
+
+                /* Execute the Device._sx_d methods */
+
+                status = acpi_ut_execute_sxds (node, info->highest_dstates);
+                if (ACPI_SUCCESS (status)) {
+                        info->valid |= ACPI_VALID_SXDS;
+                }
+        }
+
+        /* Validate/Allocate/Clear caller buffer */
+
+        status = acpi_ut_initialize_buffer (buffer, size);
+        if (ACPI_FAILURE (status)) {
+                goto cleanup;
+        }
+
+        /* Populate the return buffer */
+
+        return_info = buffer->pointer;
+        ACPI_MEMCPY (return_info, info, sizeof (struct acpi_device_info));
+
+        if (cid_list) {
+                ACPI_MEMCPY (&return_info->compatibility_id, cid_list, cid_list->size);
+        }
+
+
+cleanup:
+        ACPI_MEM_FREE (info);
+        if (cid_list) {
+                ACPI_MEM_FREE (cid_list);
+        }
+        return (status);
+}
+EXPORT_SYMBOL(acpi_get_object_info);
+