drivers/i2c/busses/i2c-parport.h

   1 /* ------------------------------------------------------------------------ *
   2  * i2c-parport.h I2C bus over parallel port                                 *
   3  * ------------------------------------------------------------------------ *
   4    Copyright (C) 2003-2010 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         unsigned int smbus_alert:1;
  42 };
  43
  44 static struct adapter_parm adapter_parm[] = {
  45         /* type 0: Philips adapter */
  46         {
  47                 .setsda = { 0x80, DATA, 1 },
  48                 .setscl = { 0x08, CTRL, 0 },
  49                 .getsda = { 0x80, STAT, 0 },
  50                 .getscl = { 0x08, STAT, 0 },
  51         },
  52         /* type 1: home brew teletext adapter */
  53         {
  54                 .setsda = { 0x02, DATA, 0 },
  55                 .setscl = { 0x01, DATA, 0 },
  56                 .getsda = { 0x80, STAT, 1 },
  57         },
  58         /* type 2: Velleman K8000 adapter */
  59         {
  60                 .setsda = { 0x02, CTRL, 1 },
  61                 .setscl = { 0x08, CTRL, 1 },
  62                 .getsda = { 0x10, STAT, 0 },
  63         },
  64         /* type 3: ELV adapter */
  65         {
  66                 .setsda = { 0x02, DATA, 1 },
  67                 .setscl = { 0x01, DATA, 1 },
  68                 .getsda = { 0x40, STAT, 1 },
  69                 .getscl = { 0x08, STAT, 1 },
  70         },
  71         /* type 4: ADM1032 evaluation board */
  72         {
  73                 .setsda = { 0x02, DATA, 1 },
  74                 .setscl = { 0x01, DATA, 1 },
  75                 .getsda = { 0x10, STAT, 1 },
  76                 .init   = { 0xf0, DATA, 0 },
  77                 .smbus_alert = 1,
  78         },
  79         /* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
  80         {
  81                 .setsda = { 0x02, DATA, 1 },
  82                 .setscl = { 0x01, DATA, 1 },
  83                 .getsda = { 0x10, STAT, 1 },
  84         },
  85         /* type 6: Barco LPT->DVI (K5800236) adapter */
  86         {
  87                 .setsda = { 0x02, DATA, 1 },
  88                 .setscl = { 0x01, DATA, 1 },
  89                 .getsda = { 0x20, STAT, 0 },
  90                 .getscl = { 0x40, STAT, 0 },
  91                 .init   = { 0xfc, DATA, 0 },
  92         },
  93         /* type 7: One For All JP1 parallel port adapter */
  94         {
  95                 .setsda = { 0x01, DATA, 0 },
  96                 .setscl = { 0x02, DATA, 0 },
  97                 .getsda = { 0x80, STAT, 1 },
  98                 .init   = { 0x04, DATA, 1 },
  99         },
 100 };
 101
 102 static int type = -1;
 103 module_param(type, int, 0);
 104 MODULE_PARM_DESC(type,
 105         "Type of adapter:\n"
 106         " 0 = Philips adapter\n"
 107         " 1 = home brew teletext adapter\n"
 108         " 2 = Velleman K8000 adapter\n"
 109         " 3 = ELV adapter\n"
 110         " 4 = ADM1032 evaluation board\n"
 111         " 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n"
 112         " 6 = Barco LPT->DVI (K5800236) adapter\n"
 113         " 7 = One For All JP1 parallel port adapter\n"
 114 );