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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/i2c/busses/i2c-parport.h
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/* ------------------------------------------------------------------------ *

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 * i2c-parport.h I2C bus over parallel port                                 *

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 * ------------------------------------------------------------------------ *

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   Copyright (C) 2003-2010 Jean Delvare <[email protected]>

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   This program is free software; you can redistribute it and/or modify

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   it under the terms of the GNU General Public License as published by

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   the Free Software Foundation; either version 2 of the License, or

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   (at your option) any later version.

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   This program is distributed in the hope that it will be useful,

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   but WITHOUT ANY WARRANTY; without even the implied warranty of

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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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   GNU General Public License for more details.

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   You should have received a copy of the GNU General Public License

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   along with this program; if not, write to the Free Software

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   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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 * ------------------------------------------------------------------------ */

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#define PORT_DATA	0

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#define PORT_STAT	1

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#define PORT_CTRL	2

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struct lineop {

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	u8 val;

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	u8 port;

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	u8 inverted;

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};

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struct adapter_parm {

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	struct lineop setsda;

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	struct lineop setscl;

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	struct lineop getsda;

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	struct lineop getscl;

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	struct lineop init;

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	unsigned int smbus_alert:1;

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};

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static const struct adapter_parm adapter_parm[] = {

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	/* type 0: Philips adapter */

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	{

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		.setsda	= { 0x80, PORT_DATA, 1 },

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		.setscl	= { 0x08, PORT_CTRL, 0 },

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		.getsda	= { 0x80, PORT_STAT, 0 },

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		.getscl	= { 0x08, PORT_STAT, 0 },

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	},

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	/* type 1: home brew teletext adapter */

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	{

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		.setsda	= { 0x02, PORT_DATA, 0 },

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		.setscl	= { 0x01, PORT_DATA, 0 },

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		.getsda	= { 0x80, PORT_STAT, 1 },

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	},

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	/* type 2: Velleman K8000 adapter */

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	{

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		.setsda	= { 0x02, PORT_CTRL, 1 },

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		.setscl	= { 0x08, PORT_CTRL, 1 },

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		.getsda	= { 0x10, PORT_STAT, 0 },

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	},

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	/* type 3: ELV adapter */

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	{

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		.setsda	= { 0x02, PORT_DATA, 1 },

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		.setscl	= { 0x01, PORT_DATA, 1 },

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		.getsda	= { 0x40, PORT_STAT, 1 },

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		.getscl	= { 0x08, PORT_STAT, 1 },

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	},

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	/* type 4: ADM1032 evaluation board */

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	{

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		.setsda	= { 0x02, PORT_DATA, 1 },

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		.setscl	= { 0x01, PORT_DATA, 1 },

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		.getsda	= { 0x10, PORT_STAT, 1 },

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		.init	= { 0xf0, PORT_DATA, 0 },

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		.smbus_alert = 1,

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	},

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	/* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */

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	{

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		.setsda	= { 0x02, PORT_DATA, 1 },

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		.setscl	= { 0x01, PORT_DATA, 1 },

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		.getsda	= { 0x10, PORT_STAT, 1 },

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	},

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	/* type 6: Barco LPT->DVI (K5800236) adapter */

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	{

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		.setsda	= { 0x02, PORT_DATA, 1 },

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		.setscl	= { 0x01, PORT_DATA, 1 },

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		.getsda	= { 0x20, PORT_STAT, 0 },

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		.getscl	= { 0x40, PORT_STAT, 0 },

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		.init	= { 0xfc, PORT_DATA, 0 },

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	},

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	/* type 7: One For All JP1 parallel port adapter */

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	{

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		.setsda	= { 0x01, PORT_DATA, 0 },

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		.setscl	= { 0x02, PORT_DATA, 0 },

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		.getsda	= { 0x80, PORT_STAT, 1 },

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		.init	= { 0x04, PORT_DATA, 1 },

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	},

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};

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static int type = -1;

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module_param(type, int, 0);

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MODULE_PARM_DESC(type,

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	"Type of adapter:\n"

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	" 0 = Philips adapter\n"

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	" 1 = home brew teletext adapter\n"

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	" 2 = Velleman K8000 adapter\n"

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	" 3 = ELV adapter\n"

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	" 4 = ADM1032 evaluation board\n"

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	" 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n"

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	" 6 = Barco LPT->DVI (K5800236) adapter\n"

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	" 7 = One For All JP1 parallel port adapter\n"

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);

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