src/jtag/drivers/bitbang.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  22  ***************************************************************************/
  23
  24 #ifndef BITBANG_H
  25 #define BITBANG_H
  26
  27 #include <jtag/swd.h>
  28
  29 struct bitbang_interface {
  30         /* low level callbacks (for bitbang)
  31          */
  32         int (*read)(void);
  33         void (*write)(int tck, int tms, int tdi);
  34         void (*reset)(int trst, int srst);
  35         void (*blink)(int on);
  36         int (*swdio_read)(void);
  37         void (*swdio_drive)(bool on);
  38 };
  39
  40 const struct swd_driver bitbang_swd;
  41
  42 extern bool swd_mode;
  43
  44 int bitbang_execute_queue(void);
  45
  46 extern struct bitbang_interface *bitbang_interface;
  47 void bitbang_switch_to_swd(void);
  48 int bitbang_swd_switch_seq(enum swd_special_seq seq);
  49
  50 #endif /* BITBANG_H */