linux/include/linux/pti.h
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   1/*
   2 *  Copyright (C) Intel 2011
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope that it will be useful,
   9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 * GNU General Public License for more details.
  12 *
  13 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  14 *
  15 * The PTI (Parallel Trace Interface) driver directs trace data routed from
  16 * various parts in the system out through the Intel Penwell PTI port and
  17 * out of the mobile device for analysis with a debugging tool
  18 * (Lauterbach, Fido). This is part of a solution for the MIPI P1149.7,
  19 * compact JTAG, standard.
  20 *
  21 * This header file will allow other parts of the OS to use the
  22 * interface to write out it's contents for debugging a mobile system.
  23 */
  24
  25#ifndef PTI_H_
  26#define PTI_H_
  27
  28/* offset for last dword of any PTI message. Part of MIPI P1149.7 */
  29#define PTI_LASTDWORD_DTS       0x30
  30
  31/* basic structure used as a write address to the PTI HW */
  32struct pti_masterchannel {
  33        u8 master;
  34        u8 channel;
  35};
  36
  37/* the following functions are defined in misc/pti.c */
  38void pti_writedata(struct pti_masterchannel *mc, u8 *buf, int count);
  39struct pti_masterchannel *pti_request_masterchannel(u8 type,
  40                                                    const char *thread_name);
  41void pti_release_masterchannel(struct pti_masterchannel *mc);
  42
  43#endif /*PTI_H_*/
  44
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