include/linux/pti.h

   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 */
  32 struct pti_masterchannel {
  33         u8 master;
  34         u8 channel;
  35 };
  36
  37 /* the following functions are defined in misc/pti.c */
  38 void pti_writedata(struct pti_masterchannel *mc, u8 *buf, int count);
  39 struct pti_masterchannel *pti_request_masterchannel(u8 type,
  40                                                     const char *thread_name);
  41 void pti_release_masterchannel(struct pti_masterchannel *mc);
  42
  43 #endif /*PTI_H_*/