release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/comedi/drivers/am9513.h

   1 /*
   2     module/am9513.h
   3     value added preprocessor definitions for Am9513 timer chip
   4
   5     COMEDI - Linux Control and Measurement Device Interface
   6     Copyright (C) 1998 David A. Schleef <ds@schleef.org>
   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 Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23
  24 #ifndef _AM9513_H_
  25 #define _AM9513_H_
  26
  27
  28 /*
  29  *
  30  */
  31
  32 #ifdef Am9513_8BITBUS
  33
  34 #define Am9513_write_register(reg, val)                         \
  35         do {                                                    \
  36                 Am9513_output_control(reg);                     \
  37                 Am9513_output_data(val>>8);                     \
  38                 Am9513_output_data(val&0xff);                   \
  39         } while (0)
  40
  41 #define Am9513_read_register(reg, val)                          \
  42         do {                                                    \
  43                 Am9513_output_control(reg);                     \
  44                 val = Am9513_input_data()<<8;                   \
  45                 val |= Am9513_input_data();                     \
  46         } while (0)
  47
  48 #else /* Am9513_16BITBUS */
  49
  50 #define Am9513_write_register(reg, val)                         \
  51         do {                                                    \
  52                 Am9513_output_control(reg);                     \
  53                 Am9513_output_data(val);                        \
  54         } while (0)
  55
  56 #define Am9513_read_register(reg, val)                          \
  57         do {                                                    \
  58                 Am9513_output_control(reg);                     \
  59                 val = Am9513_input_data();                      \
  60         } while (0)
  61
  62 #endif
  63
  64 #endif