drivers/isdn/hardware/eicon/dfifo.h

   1
   2 /*
   3  *
   4  Copyright (c) Eicon Networks, 2002.
   5  *
   6  This source file is supplied for the use with
   7  Eicon Networks range of DIVA Server Adapters.
   8  *
   9  Eicon File Revision :    2.1
  10  *
  11  This program is free software; you can redistribute it and/or modify
  12  it under the terms of the GNU General Public License as published by
  13  the Free Software Foundation; either version 2, or (at your option)
  14  any later version.
  15  *
  16  This program is distributed in the hope that it will be useful,
  17  but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY
  18  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  19  See the GNU General Public License for more details.
  20  *
  21  You should have received a copy of the GNU General Public License
  22  along with this program; if not, write to the Free Software
  23  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  */
  26 #ifndef __DIVA_IDI_DFIFO_INC__
  27 #define __DIVA_IDI_DFIFO_INC__
  28 #define DIVA_DFIFO_CACHE_SZ   64 /* Used to isolate pipe from
  29                                     rest of the world
  30                                     should be divisible by 4
  31                                  */
  32 #define DIVA_DFIFO_RAW_SZ    (2512 * 8)
  33 #define DIVA_DFIFO_DATA_SZ   68
  34 #define DIVA_DFIFO_HDR_SZ    4
  35 #define DIVA_DFIFO_SEGMENT_SZ  (DIVA_DFIFO_DATA_SZ + DIVA_DFIFO_HDR_SZ)
  36 #define DIVA_DFIFO_SEGMENTS   ((DIVA_DFIFO_RAW_SZ) / (DIVA_DFIFO_SEGMENT_SZ) + 1)
  37 #define DIVA_DFIFO_MEM_SZ (                                             \
  38                 (DIVA_DFIFO_SEGMENT_SZ) * (DIVA_DFIFO_SEGMENTS) +       \
  39                 (DIVA_DFIFO_CACHE_SZ) * 2                               \
  40                 )
  41 #define DIVA_DFIFO_STEP DIVA_DFIFO_SEGMENT_SZ
  42 /* -------------------------------------------------------------------------
  43    Block header layout is:
  44    byte[0] -> flags
  45    byte[1] -> length of data in block
  46    byte[2] -> reserved
  47    byte[4] -> reserved
  48    ------------------------------------------------------------------------- */
  49 #define DIVA_DFIFO_WRAP   0x80 /* This is the last block in fifo   */
  50 #define DIVA_DFIFO_READY  0x40 /* This block is ready for processing */
  51 #define DIVA_DFIFO_LAST   0x20 /* This block is last in message      */
  52 #define DIVA_DFIFO_AUTO   0x10 /* Don't look for 'ready', don't ack */
  53 int diva_dfifo_create(void *start, int length);
  54 #endif