diff --git a/media/mtp/MtpDebug.cpp b/media/mtp/MtpDebug.cpp
new file mode 100644
index 0000000..6d0273d
--- /dev/null
+++ b/media/mtp/MtpDebug.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "MtpDebug.h"
+
+
+struct OperationCodeEntry {
+    const char* name;
+    MtpOperationCode code;
+};
+
+static const OperationCodeEntry sOperationCodes[] = {
+    { "MTP_OPERATION_GET_DEVICE_INFO",              0x1001 },
+    { "MTP_OPERATION_OPEN_SESSION",                 0x1002 },
+    { "MTP_OPERATION_CLOSE_SESSION",                0x1003 },
+    { "MTP_OPERATION_GET_STORAGE_IDS",              0x1004 },
+    { "MTP_OPERATION_GET_STORAGE_INFO",             0x1005 },
+    { "MTP_OPERATION_GET_NUM_OBJECTS",              0x1006 },
+    { "MTP_OPERATION_GET_OBJECT_HANDLES",           0x1007 },
+    { "MTP_OPERATION_GET_OBJECT_INFO",              0x1008 },
+    { "MTP_OPERATION_GET_OBJECT",                   0x1009 },
+    { "MTP_OPERATION_GET_THUMB",                    0x100A },
+    { "MTP_OPERATION_DELETE_OBJECT",                0x100B },
+    { "MTP_OPERATION_SEND_OBJECT_INFO",             0x100C },
+    { "MTP_OPERATION_SEND_OBJECT",                  0x100D },
+    { "MTP_OPERATION_INITIATE_CAPTURE",             0x100E },
+    { "MTP_OPERATION_FORMAT_STORE",                 0x100F },
+    { "MTP_OPERATION_RESET_DEVICE",                 0x1010 },
+    { "MTP_OPERATION_SELF_TEST",                    0x1011 },
+    { "MTP_OPERATION_SET_OBJECT_PROTECTION",        0x1012 },
+    { "MTP_OPERATION_POWER_DOWN",                   0x1013 },
+    { "MTP_OPERATION_GET_DEVICE_PROP_DESC",         0x1014 },
+    { "MTP_OPERATION_GET_DEVICE_PROP_VALUE",        0x1015 },
+    { "MTP_OPERATION_SET_DEVICE_PROP_VALUE",        0x1016 },
+    { "MTP_OPERATION_RESET_DEVICE_PROP_VALUE",      0x1017 },
+    { "MTP_OPERATION_TERMINATE_OPEN_CAPTURE",       0x1018 },
+    { "MTP_OPERATION_MOVE_OBJECT",                  0x1019 },
+    { "MTP_OPERATION_COPY_OBJECT",                  0x101A },
+    { "MTP_OPERATION_GET_PARTIAL_OBJECT",           0x101B },
+    { "MTP_OPERATION_INITIATE_OPEN_CAPTURE",        0x101C },
+    { "MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED",   0x9801 },
+    { "MTP_OPERATION_GET_OBJECT_PROP_DESC",         0x9802 },
+    { "MTP_OPERATION_GET_OBJECT_PROP_VALUE",        0x9803 },
+    { "MTP_OPERATION_SET_OBJECT_PROP_VALUE",        0x9804 },
+    { "MTP_OPERATION_GET_OBJECT_REFERENCES",        0x9810 },
+    { "MTP_OPERATION_SET_OBJECT_REFERENCES",        0x9811 },
+    { "MTP_OPERATION_SKIP",                         0x9820 },
+    { 0,                                            0      },
+};
+
+
+const char* MtpDebug::getOperationCodeName(MtpOperationCode code) {
+    const OperationCodeEntry* entry = sOperationCodes;
+    while (entry->name) {
+        if (entry->code == code)
+            return entry->name;
+        entry++;
+    }
+    return "*** UNKNOWN OPERATION ***";
+}