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+/*
+ * Copyright (c) 2011, 2018 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * 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 MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * 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 DAMAGE.
+ *
+ * Authors: Ali Saidi
+ */
+
+#ifndef __DEV_PS2_HH__
+#define __DEV_PS2_HH__
+
+#include <stdint.h>
+
+#include <list>
+#include <vector>
+
+#include "base/bitunion.hh"
+
+/** @file misc functions and constants required to interface with or
+ * emulate ps2 devices
+ */
+
+namespace Ps2 {
+
+enum {
+    SelfTestPass       = 0xAA,
+    ReadID             = 0xF2,
+    Enable             = 0xF4,
+    Disable            = 0xF5,
+    DefaultsAndDisable = 0xF6,
+    SelfTestFail       = 0xFC,
+    Ack                = 0xFA,
+    Resend             = 0xFE,
+    Reset              = 0xFF,
+};
+
+namespace Keyboard {
+
+enum {
+    LEDWrite = 0xED,
+    DiagnosticEcho = 0xEE,
+    AlternateScanCodes = 0xF0,
+    TypematicInfo = 0xF3,
+    AllKeysToTypematic = 0xF7,
+    AllKeysToMakeRelease = 0xF8,
+    AllKeysToMake = 0xF9,
+    AllKeysToTypematicMakeRelease = 0xFA,
+    KeyToTypematic = 0xFB,
+    KeyToMakeRelease = 0xFC,
+    KeyToMakeOnly = 0xFD,
+};
+
+extern const std::vector<uint8_t> ID;
+
+};
+
+namespace Mouse {
+
+enum {
+    Scale1to1 = 0xE6,
+    Scale2to1 = 0xE7,
+    SetResolution = 0xE8,
+    GetStatus = 0xE9,
+    ReadData = 0xEB,
+    ResetWrapMode = 0xEC,
+    WrapMode = 0xEE,
+    RemoteMode = 0xF0,
+    SampleRate = 0xF3,
+};
+
+extern const std::vector<uint8_t> ID;
+
+};
+
+/** A bitfield that represents the first byte of a mouse movement packet
+ */
+BitUnion8(Ps2MouseMovement)
+    Bitfield<0> leftButton;
+    Bitfield<1> rightButton;
+    Bitfield<2> middleButton;
+    Bitfield<3> one;
+    Bitfield<4> xSign;
+    Bitfield<5> ySign;
+    Bitfield<6> xOverflow;
+    Bitfield<7> yOverflow;
+EndBitUnion(Ps2MouseMovement)
+
+/** Convert an x11 key symbol into a set of ps2 charecters.
+ * @param key x11 key symbol
+ * @param down if the key is being pressed or released
+ * @param cur_shift if device has already sent a shift
+ * @param keys list of keys command to send to emulate the x11 key symbol
+ */
+void keySymToPs2(uint32_t key, bool down, bool &cur_shift,
+        std::list<uint8_t> &keys);
+
+} /* namespace Ps2 */
+#endif // __DEV_PS2_HH__