sane-project-backends/include/sane/sanei_pp.h

/* sane - Scanner Access Now Easy.
   Copyright (C) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
   This file is part of the SANE package.

   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., 59 Temple Place - Suite 330, Boston,
   MA 02111-1307, USA.

   As a special exception, the authors of SANE give permission for
   additional uses of the libraries contained in this release of SANE.

   The exception is that, if you link a SANE library with other files
   to produce an executable, this does not by itself cause the
   resulting executable to be covered by the GNU General Public
   License.  Your use of that executable is in no way restricted on
   account of linking the SANE library code into it.

   This exception does not, however, invalidate any other reasons why
   the executable file might be covered by the GNU General Public
   License.

   If you submit changes to SANE to the maintainers to be included in
   a subsequent release, you agree by submitting the changes that
   those changes may be distributed with this exception intact.

   If you write modifications of your own for SANE, it is your choice
   whether to permit this exception to apply to your modifications.
   If you do not wish that, delete this exception notice. 
*/

/** @file sanei_pp.h
 * This file implements an interface for accessing the parallel-port
 *
 * @sa sanei_pp.h
 */
#ifndef sanei_pp_h
#define sanei_pp_h

#include <sys/types.h>
#include <sane/sane.h>

/** some modes, we'd like to see/use... */
enum sanei_pp_mode {
	SANEI_PP_MODE_SPP  = (1<<1),
	SANEI_PP_MODE_BIDI = (1<<2),
	SANEI_PP_MODE_EPP  = (1<<4),
	SANEI_PP_MODE_ECP  = (1<<8)
};

/**
 * Function to open a parport device. 
 *
 * @param dev -
 * @param fd  -
 * @return
 */
extern SANE_Status sanei_pp_open( const char *dev, int *fd );

/**
 * Function to close a previously opened parport device.
 *
 * @param fd - handle of the device to close
 */
extern void sanei_pp_close( int fd );

/**
 * Function to claim a parport device
 *
 * @param fd - handle of the device to claim
 * @return 
 */
extern SANE_Status sanei_pp_claim( int fd );

/**
 * Function to release a previously claimed device
 *
 * @param fd - handle of the device to release
 * @return
 */
extern SANE_Status sanei_pp_release( int fd );

/**
 * @param fd   -
 * @param mode -
 * @return
 */
extern SANE_Status sanei_pp_getmode( int fd, int *mode );

/**
 * @param fd  -
 * @param val -
 * @return
 */
extern SANE_Status sanei_pp_outb_data( int fd, SANE_Byte val );
extern SANE_Status sanei_pp_outb_ctrl( int fd, SANE_Byte val );
extern SANE_Status sanei_pp_outb_addr( int fd, SANE_Byte val );

/**
 * @param fd -
 * @return
 */
extern SANE_Byte sanei_pp_inb_data( int fd );
extern SANE_Byte sanei_pp_inb_stat( int fd );
extern SANE_Byte sanei_pp_inb_ctrl( int fd );
extern SANE_Byte sanei_pp_inb_epp ( int fd );

#endif