sane-project-backends/backend/plustek-pp.c

/*.............................................................................
 * Project : SANE library for Plustek flatbed scanners.
 *.............................................................................
 * File:	 plustek_pp.c - the interface to the parport driver...
 *.............................................................................
 *
 * based on Kazuhiro Sasayama previous work on
 * plustek.[ch] file from the SANE package.
 * original code taken from sane-0.71
 * Copyright (C) 1997 Hypercore Software Design, Ltd.
 * also based on the work done by Rick Bronson
 * Copyright (C) 2000-2002 Gerhard Jaeger <gerhard@gjaeger.de>
 *.............................................................................
 * History:
 * 0.40 - initial version
 * 0.41 - added _PTDRV_ADJUST call
 * 0.42 - added setmap function
 *        fixed the stopscan problem, that causes a crash in the kernel module
 * 0.43 - no changes
 *
 *.............................................................................
 *
 * 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.
 */

/******************* wrapper functions for parport device ********************/

/*.............................................................................
 *
 */
static int ppDev_open( const char *dev_name, void *misc )
{
	int 		    result;
	int			    handle;
	CompatAdjDef    compatAdj;
	unsigned short  version = _PTDRV_IOCTL_VERSION;
	Plustek_Device *dev     = (Plustek_Device *)misc;

	_INIT(0x378,190,15);

	if ((handle = _OPEN(dev_name)) < 0) {
	    DBG(_DBG_ERROR, "open: can't open %s as a device\n", dev_name);
    	return handle;
	}
	
	result = _IOCTL( handle, _PTDRV_OPEN_DEVICE, &version );
	if( result < 0 ) {

        if( -9019 == result ) {

			DBG( _DBG_INFO, "Version 0x%04x not supported, trying "
                            "compatibility version 0x%04x\n",
                            _PTDRV_IOCTL_VERSION, _PTDRV_COMPAT_IOCTL_VERSION);

			version = _PTDRV_COMPAT_IOCTL_VERSION;

			result = _IOCTL( handle, _PTDRV_OPEN_DEVICE, &version );
			if( result < 0 ) {
				_CLOSE( handle );
				DBG( _DBG_ERROR,
					 "ioctl PT_DRV_OPEN_DEVICE failed(%d)\n", result );

		        if( -9019 == result ) {
	    			DBG( _DBG_ERROR,
						 "Version problem, please recompile driver!\n" );
				}
			} else {

				DBG( _DBG_INFO, "Using compatibility version\n" );

				compatAdj.lampOff      = dev->adj.lampOff;
				compatAdj.lampOffOnEnd = dev->adj.lampOffOnEnd;
				compatAdj.warmup       = dev->adj.warmup;

				memcpy( &compatAdj.pos, &dev->adj.pos, sizeof(OffsDef));
				memcpy( &compatAdj.neg, &dev->adj.neg, sizeof(OffsDef));
				memcpy( &compatAdj.tpa, &dev->adj.tpa, sizeof(OffsDef));

				_IOCTL( handle, _PTDRV_ADJUST, &compatAdj );
				return handle;
			}
		}
		return result;
    }

	_IOCTL( handle, _PTDRV_ADJUST, &dev->adj );

	return handle;
}

/*.............................................................................
 *
 */
static int ppDev_close( Plustek_Device *dev )
{
	return _CLOSE( dev->fd );
}

/*.............................................................................
 *
 */
static int ppDev_getCaps( Plustek_Device *dev )
{
	return _IOCTL( dev->fd, _PTDRV_GET_CAPABILITIES, &dev->caps );
}

/*.............................................................................
 *
 */
static int ppDev_getLensInfo( Plustek_Device *dev, pLensInfo lens )
{
	return _IOCTL( dev->fd, _PTDRV_GET_LENSINFO, lens );
}

/*.............................................................................
 *
 */
static int ppDev_getCropInfo( Plustek_Device *dev, pCropInfo crop )
{
	return _IOCTL( dev->fd, _PTDRV_GET_CROPINFO, crop );
}

/*.............................................................................
 *
 */
static int ppDev_putImgInfo( Plustek_Device *dev, pImgDef img )
{
	return _IOCTL( dev->fd, _PTDRV_PUT_IMAGEINFO, img );
}

/*.............................................................................
 *
 */
static int ppDev_setScanEnv( Plustek_Device *dev, pScanInfo sinfo )
{
	return _IOCTL( dev->fd, _PTDRV_SET_ENV, sinfo );
}

/*.............................................................................
 *
 */
static int ppDev_startScan( Plustek_Device *dev, pStartScan start )
{
	return _IOCTL( dev->fd, _PTDRV_START_SCAN, start );
}

/**
 * function to send a gamma table to the kernel module. As the default table
 * entry is 16-bit, but the maps are 8-bit, we have to copy the values...
 */
static int ppDev_setMap( Plustek_Device *dev, SANE_Word *map,
						 SANE_Word length, SANE_Word channel )
{
	SANE_Byte *buf;
	SANE_Word  i;
	MapDef     m;

	m.len    = length;
	m.map_id = channel;

	m.map = (void *)map;
		
	DBG(_DBG_INFO,"Setting map[%u] at 0x%08lx\n", channel, (unsigned long)map);

	buf = (SANE_Byte*)malloc( m.len );
	
	if( !buf )
		return _E_ALLOC;
	
	for( i = 0; i < m.len; i++ ) {
		buf[i] = (SANE_Byte)map[i];
		
		if( map[i] > 0xFF )
			buf[i] = 0xFF;
	}	
	
	m.map = buf;
	
	_IOCTL( dev->fd, _PTDRV_SETMAP, &m );
	/* we ignore the return values */

	free( buf );
	
	return 0;
}

/*.............................................................................
 *
 */
static int ppDev_stopScan( Plustek_Device *dev, int *mode )
{
	int retval, tmp;

	/* save this one... */
	tmp = *mode;

	retval = _IOCTL( dev->fd, _PTDRV_STOP_SCAN, mode );

	/* ... and use it here */
	if( 0 == tmp )
		_IOCTL( dev->fd, _PTDRV_CLOSE_DEVICE, 0);
	else
		sleep( 1 );		

	return retval;
}

/*.............................................................................
 *
 */
static int ppDev_readImage( Plustek_Device *dev,
                            SANE_Byte *buf, unsigned long data_length )
{
	return _READ( dev->fd, buf, data_length );
}

/* END PLUSTEK_PP.C .........................................................*/