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-rw-r--r--drivers/acpi/namespace/nsxfname.c369
1 files changed, 369 insertions, 0 deletions
diff --git a/drivers/acpi/namespace/nsxfname.c b/drivers/acpi/namespace/nsxfname.c
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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);
+
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