helper: Add converter from JEP106 ID to manufacturer name

Use it to print the manufacturer of detected TAPs

Change-Id: Ic4384c61c7f6f7ae2a9b860a805a5997542f72cc
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3177
Tested-by: jenkins
Reviewed-by: Jiri Kastner <cz172638@gmail.com>
Reviewed-by: Paul Fertser <fercerpav@gmail.com>

src/helper/jep106.h

@@ -0,0 +1,29 @@
+/***************************************************************************
+ *   Copyright (C) 2015 Andreas Fritiofson                                 *
+ *   andreas.fritiofson@gmail.com                                          *
+ *                                                                         *
+ *   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 program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ ***************************************************************************/
+
+#ifndef JEP106_H
+#define JEP106_H
+
+/**
+ * Get the manufacturer name associated with a JEP106 ID.
+ * @param bank The bank (number of continuation codes) of the manufacturer ID.
+ * @param id The 7-bit manufacturer ID (i.e. with parity stripped).
+ * @return A pointer to static const storage containing the name of the
+ *         manufacturer associated with bank and id, or one of the strings
+ *         "<invalid>" and "<unknown>".
+ */
+const char *jep106_manufacturer(unsigned bank, unsigned id);
+
+#endif