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-rw-r--r--backend/plustek-pp_wrapper.c361
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+/** @file plustek-pp_wrapper.c
+ * @brief The interface to the parport driver-code and the kernel module.
+ *
+ * Based on sources acquired from Plustek Inc.<br>
+ * Copyright (C) 2001-2004 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 - added initialized setting
+ * - cleanup
+ * .
+ * <hr>
+ * 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.
+ * <hr>
+ */
+
+/******************* wrapper functions for parport device ********************/
+
+#ifndef _BACKEND_ENABLED
+
+static int PtDrvInit( char *dev_name, unsigned short model_override )
+{
+ _VAR_NOT_USED( dev_name );
+ _VAR_NOT_USED( model_override );
+ DBG( _DBG_ERROR, "Backend does not support direct I/O!\n" );
+ return -1;
+}
+
+static int PtDrvShutdown( void )
+{
+ return 0;
+}
+
+static int PtDrvOpen( void )
+{
+ DBG( _DBG_ERROR, "Backend does not support direct I/O!\n" );
+ return -1;
+}
+
+static int PtDrvClose( void )
+{
+ DBG( _DBG_ERROR, "Backend does not support direct I/O!\n" );
+ return 0;
+}
+
+static int PtDrvIoctl( unsigned int cmd, void *arg )
+{
+ DBG( _DBG_ERROR, "Backend does not support direct I/O!\n" );
+ _VAR_NOT_USED( cmd );
+ if( arg == NULL )
+ return -2;
+ return -1;
+}
+
+static int PtDrvRead( unsigned char *buffer, int count )
+{
+ DBG( _DBG_ERROR, "Backend does not support direct I/O!\n" );
+ _VAR_NOT_USED( count );
+ if( buffer == NULL )
+ return -2;
+ return -1;
+}
+#endif /* _BACKEND_ENABLED */
+
+/**
+ */
+static int ppDev_open( const char *dev_name, void *misc )
+{
+ int result;
+ int handle;
+ CompatAdjDef compatAdj;
+ PPAdjDef adj;
+ unsigned short version = _PTDRV_IOCTL_VERSION;
+ Plustek_Device *dev = (Plustek_Device *)misc;
+
+ if( dev->adj.direct_io ) {
+ result = PtDrvInit( dev_name, dev->adj.mov );
+ if( 0 != result ) {
+ DBG( _DBG_ERROR, "open: PtDrvInit failed: %d\n", result );
+ return -1;
+ }
+ }
+
+ if( dev->adj.direct_io )
+ handle = PtDrvOpen();
+ else
+ handle = open( dev_name, O_RDONLY );
+
+ if ( handle < 0 ) {
+ DBG( _DBG_ERROR, "open: can't open %s as a device\n", dev_name );
+ return handle;
+ }
+
+ if( dev->adj.direct_io )
+ result = PtDrvIoctl( _PTDRV_OPEN_DEVICE, &version );
+ else
+ 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;
+
+ if( dev->adj.direct_io )
+ result = PtDrvIoctl( _PTDRV_OPEN_DEVICE, &version );
+ else
+ result = ioctl( handle, _PTDRV_OPEN_DEVICE, &version );
+
+ if( result < 0 ) {
+
+ if( dev->adj.direct_io )
+ PtDrvClose();
+ else
+ close( dev->fd );
+
+ 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));
+
+ if( dev->adj.direct_io )
+ PtDrvIoctl( _PTDRV_ADJUST, &compatAdj );
+ else
+ ioctl( handle, _PTDRV_ADJUST, &compatAdj );
+ return handle;
+ }
+ }
+ return result;
+ }
+
+ memset( &adj, 0, sizeof(PPAdjDef));
+
+ adj.lampOff = dev->adj.lampOff;
+ adj.lampOffOnEnd = dev->adj.lampOffOnEnd;
+ adj.warmup = dev->adj.warmup;
+
+ memcpy( &adj.pos, &dev->adj.pos, sizeof(OffsDef));
+ memcpy( &adj.neg, &dev->adj.neg, sizeof(OffsDef));
+ memcpy( &adj.tpa, &dev->adj.tpa, sizeof(OffsDef));
+
+ adj.rgamma = dev->adj.rgamma;
+ adj.ggamma = dev->adj.ggamma;
+ adj.bgamma = dev->adj.bgamma;
+ adj.graygamma = dev->adj.graygamma;
+
+ if( dev->adj.direct_io )
+ PtDrvIoctl( _PTDRV_ADJUST, &adj );
+ else
+ ioctl( handle, _PTDRV_ADJUST, &adj );
+
+ dev->initialized = SANE_TRUE;
+ return handle;
+}
+
+/**
+ */
+static int ppDev_close( Plustek_Device *dev )
+{
+ if( dev->adj.direct_io )
+ return PtDrvClose();
+ else
+ return close( dev->fd );
+}
+
+/**
+ */
+static int ppDev_getCaps( Plustek_Device *dev )
+{
+ if( dev->adj.direct_io )
+ return PtDrvIoctl( _PTDRV_GET_CAPABILITIES, &dev->caps );
+ else
+ return ioctl( dev->fd, _PTDRV_GET_CAPABILITIES, &dev->caps );
+}
+
+/**
+ */
+static int ppDev_getLensInfo( Plustek_Device *dev, pLensInfo lens )
+{
+ if( dev->adj.direct_io )
+ return PtDrvIoctl( _PTDRV_GET_LENSINFO, lens );
+ else
+ return ioctl( dev->fd, _PTDRV_GET_LENSINFO, lens );
+}
+
+/**
+ */
+static int ppDev_getCropInfo( Plustek_Device *dev, pCropInfo crop )
+{
+ if( dev->adj.direct_io )
+ return PtDrvIoctl( _PTDRV_GET_CROPINFO, crop );
+ else
+ return ioctl( dev->fd, _PTDRV_GET_CROPINFO, crop );
+}
+
+/**
+ */
+static int ppDev_putImgInfo( Plustek_Device *dev, pImgDef img )
+{
+ if( dev->adj.direct_io )
+ return PtDrvIoctl( _PTDRV_PUT_IMAGEINFO, img );
+ else
+ return ioctl( dev->fd, _PTDRV_PUT_IMAGEINFO, img );
+}
+
+/**
+ */
+static int ppDev_setScanEnv( Plustek_Device *dev, pScanInfo sinfo )
+{
+ if( dev->adj.direct_io )
+ return PtDrvIoctl( _PTDRV_SET_ENV, sinfo );
+ else
+ return ioctl( dev->fd, _PTDRV_SET_ENV, sinfo );
+}
+
+/**
+ */
+static int ppDev_startScan( Plustek_Device *dev, pStartScan start )
+{
+ if( dev->adj.direct_io )
+ return PtDrvIoctl( _PTDRV_START_SCAN, start );
+ else
+ 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;
+
+ if( dev->adj.direct_io )
+ PtDrvIoctl( _PTDRV_SETMAP, &m );
+ else
+ ioctl( dev->fd, _PTDRV_SETMAP, &m );
+
+ /* we ignore the return values */
+ free( buf );
+ return 0;
+}
+
+/**
+ */
+static int ppDev_stopScan( Plustek_Device *dev, short *mode )
+{
+ int retval, tmp;
+
+ /* save this one... */
+ tmp = *mode;
+
+ if( dev->adj.direct_io )
+ retval = PtDrvIoctl( _PTDRV_STOP_SCAN, mode );
+ else
+ retval = ioctl( dev->fd, _PTDRV_STOP_SCAN, mode );
+
+ /* ... and use it here */
+ if( 0 == tmp ) {
+ if( dev->adj.direct_io )
+ PtDrvIoctl( _PTDRV_CLOSE_DEVICE, 0 );
+ else
+ 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 )
+{
+ if( dev->adj.direct_io )
+ return PtDrvRead( buf, data_length );
+ else
+ return read( dev->fd, buf, data_length );
+}
+
+/* END PLUSTEK-PP_WRAPPER.C .................................................*/
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