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

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8.9 KiB
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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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