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diff --git a/firmware/target/hosted/sonynwz/nwz_keys.h b/firmware/target/hosted/sonynwz/nwz_keys.h
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+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2016 Amaury Pouly
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef __NWZ_KEYS_H__
+#define __NWZ_KEYS_H__
+
+/* The Sony icx_key driver reports keys via the /dev/input/event0 device and
+ * abuses the standard struct input_event. The input_event.code is split into
+ * two parts:
+ * - one part giving the code of the key just pressed/released
+ * - one part is a bitmap of various keys (such as HOLD)
+ * The status of the HOLD can be queried at any time by reading the state of
+ * the first LED.
+ */
+
+/* device name */
+#define NWZ_KEY_NAME "icx_key"
+
+/* key code and mask */
+#define NWZ_KEY_MASK 0x1f
+#define NWZ_KEY_PLAY 0
+#define NWZ_KEY_RIGHT 1
+#define NWZ_KEY_LEFT 2
+#define NWZ_KEY_UP 3
+#define NWZ_KEY_DOWN 4
+#define NWZ_KEY_ZAPPIN 5
+#define NWZ_KEY_AD0_6 6
+#define NWZ_KEY_AD0_7 7
+/* special "key" when event is for bitmap key, like HOLD */
+#define NWZ_KEY_NONE 15
+#define NWZ_KEY_VOL_DOWN 16
+#define NWZ_KEY_VOL_UP 17
+#define NWZ_KEY_BACK 18
+#define NWZ_KEY_OPTION 19
+#define NWZ_KEY_BT 20
+#define NWZ_KEY_AD1_5 21
+#define NWZ_KEY_AD1_6 22
+#define NWZ_KEY_AD1_7 23
+
+/* bitmap of other things */
+#define NWZ_KEY_NMLHP_MASK 0x20
+#define NWZ_KEY_NCHP_MASK 0x40
+#define NWZ_KEY_HOLD_MASK 0x80
+#define NWZ_KEY_NC_MASK 0x100
+
+#endif /* __NWZ_KEYS_H__ */