text: /* ------------------------------------------------------------------------ *
   * i2c-parport.h I2C bus over parallel port                                 *
   * ------------------------------------------------------------------------ *
     Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   * ------------------------------------------------------------------------ */
  
  #define PORT_DATA	0
  #define PORT_STAT	1
  #define PORT_CTRL	2
  
  struct lineop {
  	u8 val;
  	u8 port;
  	u8 inverted;
  };
  
  struct adapter_parm {
  	struct lineop setsda;
  	struct lineop setscl;
  	struct lineop getsda;
  	struct lineop getscl;
  	struct lineop init;
  	unsigned int smbus_alert:1;
  };
  
  static const struct adapter_parm adapter_parm[] = {
  	/* type 0: Philips adapter */
  	{
  		.setsda	= { 0x80, PORT_DATA, 1 },
  		.setscl	= { 0x08, PORT_CTRL, 0 },
  		.getsda	= { 0x80, PORT_STAT, 0 },
  		.getscl	= { 0x08, PORT_STAT, 0 },
  	},
  	/* type 1: home brew teletext adapter */
  	{
  		.setsda	= { 0x02, PORT_DATA, 0 },
  		.setscl	= { 0x01, PORT_DATA, 0 },
  		.getsda	= { 0x80, PORT_STAT, 1 },
  	},
  	/* type 2: Velleman K8000 adapter */
  	{
  		.setsda	= { 0x02, PORT_CTRL, 1 },
  		.setscl	= { 0x08, PORT_CTRL, 1 },
  		.getsda	= { 0x10, PORT_STAT, 0 },
  	},
  	/* type 3: ELV adapter */
  	{
  		.setsda	= { 0x02, PORT_DATA, 1 },
  		.setscl	= { 0x01, PORT_DATA, 1 },
  		.getsda	= { 0x40, PORT_STAT, 1 },
  		.getscl	= { 0x08, PORT_STAT, 1 },
  	},
  	/* type 4: ADM1032 evaluation board */
  	{
  		.setsda	= { 0x02, PORT_DATA, 1 },
  		.setscl	= { 0x01, PORT_DATA, 1 },
  		.getsda	= { 0x10, PORT_STAT, 1 },
  		.init	= { 0xf0, PORT_DATA, 0 },
  		.smbus_alert = 1,
  	},
  	/* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
  	{
  		.setsda	= { 0x02, PORT_DATA, 1 },
  		.setscl	= { 0x01, PORT_DATA, 1 },
  		.getsda	= { 0x10, PORT_STAT, 1 },
  	},
  	/* type 6: Barco LPT->DVI (K5800236) adapter */
  	{
  		.setsda	= { 0x02, PORT_DATA, 1 },
  		.setscl	= { 0x01, PORT_DATA, 1 },
  		.getsda	= { 0x20, PORT_STAT, 0 },
  		.getscl	= { 0x40, PORT_STAT, 0 },
  		.init	= { 0xfc, PORT_DATA, 0 },
  	},
  	/* type 7: One For All JP1 parallel port adapter */
  	{
  		.setsda	= { 0x01, PORT_DATA, 0 },
  		.setscl	= { 0x02, PORT_DATA, 0 },
  		.getsda	= { 0x80, PORT_STAT, 1 },
  		.init	= { 0x04, PORT_DATA, 1 },
  	},
  };
  
  static int type = -1;
  module_param(type, int, 0);
  MODULE_PARM_DESC(type,
  	"Type of adapter:\n"
  	" 0 = Philips adapter\n"
  	" 1 = home brew teletext adapter\n"
  	" 2 = Velleman K8000 adapter\n"
  	" 3 = ELV adapter\n"
  	" 4 = ADM1032 evaluation board\n"
  	" 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n"
  	" 6 = Barco LPT->DVI (K5800236) adapter\n"
  	" 7 = One For All JP1 parallel port adapter\n"
  );
  