drivers/i2c/busses/i2c-parport.h

   1 /* ------------------------------------------------------------------------ *
   2  * i2c-parport.h I2C bus over parallel port                                 *
   3  * ------------------------------------------------------------------------ *
   4    Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  * ------------------------------------------------------------------------ */
  20
  21 #ifdef DATA
  22 #undef DATA
  23 #endif
  24
  25 #define DATA    0
  26 #define STAT    1
  27 #define CTRL    2
  28
  29 struct lineop {
  30         u8 val;
  31         u8 port;
  32         u8 inverted;
  33 };
  34
  35 struct adapter_parm {
  36         struct lineop setsda;
  37         struct lineop setscl;
  38         struct lineop getsda;
  39         struct lineop getscl;
  40         struct lineop init;
  41 };
  42
  43 static struct adapter_parm adapter_parm[] = {
  44         /* type 0: Philips adapter */
  45         {
  46                 .setsda = { 0x80, DATA, 1 },
  47                 .setscl = { 0x08, CTRL, 0 },
  48                 .getsda = { 0x80, STAT, 0 },
  49                 .getscl = { 0x08, STAT, 0 },
  50         },
  51         /* type 1: home brew teletext adapter */
  52         {
  53                 .setsda = { 0x02, DATA, 0 },
  54                 .setscl = { 0x01, DATA, 0 },
  55                 .getsda = { 0x80, STAT, 1 },
  56         },
  57         /* type 2: Velleman K8000 adapter */
  58         {
  59                 .setsda = { 0x02, CTRL, 1 },
  60                 .setscl = { 0x08, CTRL, 1 },
  61                 .getsda = { 0x10, STAT, 0 },
  62         },
  63         /* type 3: ELV adapter */
  64         {
  65                 .setsda = { 0x02, DATA, 1 },
  66                 .setscl = { 0x01, DATA, 1 },
  67                 .getsda = { 0x40, STAT, 1 },
  68                 .getscl = { 0x08, STAT, 1 },
  69         },
  70         /* type 4: ADM1032 evaluation board */
  71         {
  72                 .setsda = { 0x02, DATA, 1 },
  73                 .setscl = { 0x01, DATA, 1 },
  74                 .getsda = { 0x10, STAT, 1 },
  75                 .init   = { 0xf0, DATA, 0 },
  76         },
  77         /* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
  78         {
  79                 .setsda = { 0x02, DATA, 1 },
  80                 .setscl = { 0x01, DATA, 1 },
  81                 .getsda = { 0x10, STAT, 1 },
  82         },
  83 };
  84
  85 static int type;
  86 module_param(type, int, 0);
  87 MODULE_PARM_DESC(type,
  88         "Type of adapter:\n"
  89         " 0 = Philips adapter\n"
  90         " 1 = home brew teletext adapter\n"
  91         " 2 = Velleman K8000 adapter\n"
  92         " 3 = ELV adapter\n"
  93         " 4 = ADM1032 evaluation board\n"
  94         " 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n");