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  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifndef BITBANG_H
  24 #define BITBANG_H
  25
  26 #include <jtag/interface.h>
  27
  28 struct jtag_device;
  29 struct bitbang_device;
  30
  31 /**
  32  * Defines the set of low-level callbacks for bit-bang devices.
  33  */
  34 struct bitbang_interface {
  35         int (*read)(struct bitbang_device *interface);
  36         void (*write)(struct bitbang_device *interface,
  37                         bool tck, bool tms, bool tdi);
  38         void (*reset)(struct bitbang_device *interface, bool trst, bool srst);
  39         void (*blink)(struct bitbang_device *interface, bool on);
  40 };
  41
  42 struct bitbang_device {
  43         struct bitbang_interface *driver;
  44 };
  45
  46 static inline
  47 struct bitbang_device *bitbang_from_jtag_device(struct jtag_device *jtag)
  48 {
  49         return (struct bitbang_device *)jtag_device_data(jtag);
  50 }
  51
  52
  53 int bitbang_execute_queue(struct jtag_device *jtag);
  54
  55 #endif /* BITBANG_H */