[dev] add primitive keys state management (keys device)
diff --git a/include/dev/keys.h b/include/dev/keys.h
new file mode 100644
index 0000000..129f21b
--- /dev/null
+++ b/include/dev/keys.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2009, Google Inc.
+ * All rights reserved.
+ *
+ * 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 Google, Inc. 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.
+ */
+
+#ifndef __DEV_KEYS_H
+#define __DEV_KEYS_H
+
+#include <sys/types.h>
+
+/* these are just the ascii values for the chars */
+#define KEY_0 0x30
+#define KEY_1 0x31
+#define KEY_2 0x32
+#define KEY_3 0x33
+#define KEY_4 0x34
+#define KEY_5 0x35
+#define KEY_6 0x36
+#define KEY_7 0x37
+#define KEY_8 0x38
+#define KEY_9 0x39
+
+#define KEY_A 0x61
+
+#define KEY_ESC 0x100
+#define KEY_F1 0x101
+#define KEY_F2 0x102
+#define KEY_F3 0x103
+#define KEY_F4 0x104
+#define KEY_F5 0x105
+#define KEY_F6 0x106
+#define KEY_F7 0x107
+#define KEY_F8 0x108
+#define KEY_F9 0x109
+
+#define KEY_LEFT 0x110
+#define KEY_RIGHT 0x111
+#define KEY_UP 0x112
+#define KEY_DOWN 0x113
+#define KEY_CENTER 0x114
+
+#define KEY_VOLUMEUP 0x115
+#define KEY_VOLUMEDOWN 0x116
+#define KEY_MUTE 0x117
+
+#define KEY_SOFT1 0x11a
+#define KEY_SOFT2 0x11b
+#define KEY_STAR 0x11c
+#define KEY_SHARP 0x11d
+#define KEY_MAIL 0x11e
+
+#define KEY_SEND 0x120
+#define KEY_CLEAR 0x121
+#define KEY_HOME 0x122
+#define KEY_BACK 0x123
+
+#define MAX_KEYS 0x1ff
+
+void keys_init(void);
+void keys_post_event(uint16_t code, int16_t value);
+int keys_get_state(uint16_t code);
+
+#endif /* __DEV_KEYS_H */