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 #define PORT_DATA       0
  22 #define PORT_STAT       1
  23 #define PORT_CTRL       2
  24
  25 struct lineop {
  26         u8 val;
  27         u8 port;
  28         u8 inverted;
  29 };
  30
  31 struct adapter_parm {
  32         struct lineop setsda;
  33         struct lineop setscl;
  34         struct lineop getsda;
  35         struct lineop getscl;
  36         struct lineop init;
  37         unsigned int smbus_alert:1;
  38 };
  39
  40 static const struct adapter_parm adapter_parm[] = {
  41         /* type 0: Philips adapter */
  42         {
  43                 .setsda = { 0x80, PORT_DATA, 1 },
  44                 .setscl = { 0x08, PORT_CTRL, 0 },
  45                 .getsda = { 0x80, PORT_STAT, 0 },
  46                 .getscl = { 0x08, PORT_STAT, 0 },
  47         },
  48         /* type 1: home brew teletext adapter */
  49         {
  50                 .setsda = { 0x02, PORT_DATA, 0 },
  51                 .setscl = { 0x01, PORT_DATA, 0 },
  52                 .getsda = { 0x80, PORT_STAT, 1 },
  53         },
  54         /* type 2: Velleman K8000 adapter */
  55         {
  56                 .setsda = { 0x02, PORT_CTRL, 1 },
  57                 .setscl = { 0x08, PORT_CTRL, 1 },
  58                 .getsda = { 0x10, PORT_STAT, 0 },
  59         },
  60         /* type 3: ELV adapter */
  61         {
  62                 .setsda = { 0x02, PORT_DATA, 1 },
  63                 .setscl = { 0x01, PORT_DATA, 1 },
  64                 .getsda = { 0x40, PORT_STAT, 1 },
  65                 .getscl = { 0x08, PORT_STAT, 1 },
  66         },
  67         /* type 4: ADM1032 evaluation board */
  68         {
  69                 .setsda = { 0x02, PORT_DATA, 1 },
  70                 .setscl = { 0x01, PORT_DATA, 1 },
  71                 .getsda = { 0x10, PORT_STAT, 1 },
  72                 .init   = { 0xf0, PORT_DATA, 0 },
  73                 .smbus_alert = 1,
  74         },
  75         /* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
  76         {
  77                 .setsda = { 0x02, PORT_DATA, 1 },
  78                 .setscl = { 0x01, PORT_DATA, 1 },
  79                 .getsda = { 0x10, PORT_STAT, 1 },
  80         },
  81         /* type 6: Barco LPT->DVI (K5800236) adapter */
  82         {
  83                 .setsda = { 0x02, PORT_DATA, 1 },
  84                 .setscl = { 0x01, PORT_DATA, 1 },
  85                 .getsda = { 0x20, PORT_STAT, 0 },
  86                 .getscl = { 0x40, PORT_STAT, 0 },
  87                 .init   = { 0xfc, PORT_DATA, 0 },
  88         },
  89         /* type 7: One For All JP1 parallel port adapter */
  90         {
  91                 .setsda = { 0x01, PORT_DATA, 0 },
  92                 .setscl = { 0x02, PORT_DATA, 0 },
  93                 .getsda = { 0x80, PORT_STAT, 1 },
  94                 .init   = { 0x04, PORT_DATA, 1 },
  95         },
  96 };
  97
  98 static int type = -1;
  99 module_param(type, int, 0);
 100 MODULE_PARM_DESC(type,
 101         "Type of adapter:\n"
 102         " 0 = Philips adapter\n"
 103         " 1 = home brew teletext adapter\n"
 104         " 2 = Velleman K8000 adapter\n"
 105         " 3 = ELV adapter\n"
 106         " 4 = ADM1032 evaluation board\n"
 107         " 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n"
 108         " 6 = Barco LPT->DVI (K5800236) adapter\n"
 109         " 7 = One For All JP1 parallel port adapter\n"
 110 );