kopia lustrzana https://gitlab.com/sane-project/backends
822 wiersze
20 KiB
C
822 wiersze
20 KiB
C
/* @file plustek-pp_misc.c
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* @brief here we have some helpful functions
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*
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* based on sources acquired from Plustek Inc.
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* Copyright (C) 1998 Plustek Inc.
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* Copyright (C) 2000-2004 Gerhard Jaeger <gerhard@gjaeger.de>
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* also based on the work done by Rick Bronson
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*
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* History:
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* - 0.30 - initial version
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* - 0.31 - no changes
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* - 0.32 - moved the parport functions inside this module
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* - now using the information, the parport-driver provides
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* - for selecting the port-mode this driver uses
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* - 0.33 - added code to use faster portmodes
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* - 0.34 - added sample code for changing from ECP to PS/2 bidi mode
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* - 0.35 - added Kevins' changes (new function miscSetFastMode())
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* - moved function initPageSettings() to module models.c
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* - 0.36 - added random generator
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* - added additional debug messages
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* - changed prototype of MiscInitPorts()
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* - added miscPreemptionCallback()
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* - 0.37 - changed inb_p/outb_p to macro calls (kernel-mode)
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* - added MiscGetModelName()
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* - added miscShowPortModes()
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* - 0.38 - fixed a small bug in MiscGetModelName()
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* - 0.39 - added forceMode support
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* - 0.40 - no changes
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* - 0.41 - merged Kevins' patch to make EPP(ECP) work
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* - 0.42 - changed get_fast_time to _GET_TIME
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* - changed include names
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* - 0.43 - added LINUX_26 stuff
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* - minor fixes
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* - removed floating point stuff
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* .
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* <hr>
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* This file is part of the SANE package.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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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., 59 Temple Place - Suite 330, Boston,
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* MA 02111-1307, USA.
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*
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* As a special exception, the authors of SANE give permission for
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* additional uses of the libraries contained in this release of SANE.
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*
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* The exception is that, if you link a SANE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public
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* License. Your use of that executable is in no way restricted on
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* account of linking the SANE library code into it.
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*
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* This exception does not, however, invalidate any other reasons why
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* the executable file might be covered by the GNU General Public
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* License.
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*
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* If you submit changes to SANE to the maintainers to be included in
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* a subsequent release, you agree by submitting the changes that
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* those changes may be distributed with this exception intact.
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*
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* If you write modifications of your own for SANE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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* <hr>
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*/
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#include "plustek-pp_scan.h"
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/*************************** some definitions ********************************/
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#ifndef __KERNEL__
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# define PPA_PROBE_SPP 0x0001
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# define PPA_PROBE_PS2 0x0002
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# define PPA_PROBE_ECR 0x0010
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# define PPA_PROBE_EPP17 0x0100
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# define PPA_PROBE_EPP19 0x0200
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#else
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/* the parport driver in Kernel 2.4 has changed. It does report the
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* possible modes in a different, more general way. As long, as
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* we do not use the parport-module change mode facility, I assume
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* the following correlations
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*/
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#if defined LINUX_24 || defined LINUX_26
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# define PARPORT_MODE_PCPS2 PARPORT_MODE_TRISTATE
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# define PARPORT_MODE_PCEPP PARPORT_MODE_EPP
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# define PARPORT_MODE_PCECPPS2 PARPORT_MODE_TRISTATE
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# define PARPORT_MODE_PCECPEPP PARPORT_MODE_EPP
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# define PARPORT_MODE_PCECR PARPORT_MODE_ECP
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#endif
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#endif
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#define _PP_A 16807 /**< multiplier */
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#define _PP_M 2147483647L /**< 2**31 - 1 */
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/*************************** some local vars *********************************/
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static int port_feature = 0;
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static long randomnum = 1;
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#ifdef __KERNEL__
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static int portIsClaimed[_MAX_PTDEVS] = { [0 ... (_MAX_PTDEVS-1)] = 0 };
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MODELSTR; /**< a static char array (see plustek-pp.h) */
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#else
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static int portIsClaimed[_MAX_PTDEVS] = { 0, 0, 0, 0 };
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#endif
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/*************************** local functions *********************************/
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#ifdef __KERNEL__
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#ifdef LINUX_26
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static pScanData __ps = NULL;
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static int __pa = -1;
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/** callback from parport driver
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*/
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static void misc_attach(struct parport *port)
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{
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DBG( DBG_LOW, "misc_attach\n" );
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__ps->pp = NULL;
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if( port->base == (unsigned long)__pa ) {
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DBG( DBG_LOW, "Requested port (0x%02x) found\n", __pa );
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DBG( DBG_LOW, "Port mode reported: (0x%04x)\n", port->modes );
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__ps->pp = port;
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}
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}
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static void misc_detach( struct parport *port )
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{
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DBG( DBG_LOW, "misc_detach\n" );
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}
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static struct parport_driver pt_drv = {
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.name = "pt_drv",
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.attach = misc_attach,
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.detach = misc_detach,
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};
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#endif
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/** display the avaialable port-modes
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*/
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#ifdef DEBUG
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static void miscShowPortModes( int modes )
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{
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DBG( DBG_LOW, "parport-modi:" );
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if( modes & PARPORT_MODE_PCSPP )
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DBG( DBG_LOW, " SPP" );
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if( modes & PARPORT_MODE_PCPS2 )
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DBG( DBG_LOW, " PS/2" );
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if( modes & PARPORT_MODE_PCEPP )
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DBG( DBG_LOW, " EPP" );
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if( modes & PARPORT_MODE_PCECR )
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DBG( DBG_LOW, " ECP" );
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if( modes & PARPORT_MODE_PCECPEPP )
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DBG( DBG_LOW, " EPP(ECP)" );
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if( modes & PARPORT_MODE_PCECPPS2 )
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DBG( DBG_LOW, " PS/2(ECP)" );
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DBG( DBG_LOW, "\n" );
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}
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#endif
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/** probe the parallel port
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*/
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static int initPortProbe( pScanData ps )
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{
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int retv = 0;
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/* clear the controls */
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ps->IO.lastPortMode = 0xFFFF;
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if( NULL != ps->pardev )
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retv = ps->pardev->port->modes;
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return retv;
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}
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/** will be called by the parport module when we already have access, but
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* another module wants access to the port...
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*/
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static int miscPreemptionCallback( pVoid data )
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{
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pScanData ps = (pScanData)data;
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if( NULL != ps ) {
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/* never release during scanning */
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if( ps->DataInf.dwScanFlag & _SCANNER_SCANNING ) {
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DBG( DBG_LOW, "no way!!!\n" );
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return 1;
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}
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}
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/* let the port go...*/
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return 0;
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}
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/** depending on the reported possible port modes, we try to set a faster mode
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* than SPP
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*/
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static int miscSetFastMode( pScanData ps )
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{
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UChar a, b;
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/*
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* when previously found the EPP mode, break right here
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*/
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if (( _PORT_EPP == ps->IO.portMode ) && (!(port_feature & PARPORT_MODE_PCECR)))
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return _OK;
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/* CHECK REMOVE: from here we should have SPP (Paranoia Code !) */
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if (( _PORT_SPP != ps->IO.portMode ) && (!(port_feature & PARPORT_MODE_PCECR)))
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return _OK;
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DBG(DBG_LOW, "Trying faster mode...\n" );
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/*
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* ECP mode usually has sub-modes of EPP and/or PS2.
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* First we try to set EPP
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*/
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if((port_feature & PARPORT_MODE_PCECR) &&
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(port_feature & PARPORT_MODE_PCECPEPP)){
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DBG(DBG_LOW, "Attempting to set EPP from ECP mode.\n" );
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a = _INB_ECTL(ps); /* get current ECR */
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ps->IO.lastPortMode = a; /* save it for restoring later */
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a = (a & 0x1F) | 0x80; /* set to EPP */
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_OUTB_ECTL(ps, a); /* write it back */
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_DO_UDELAY(1);
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/*
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* It is probably unnecessary to
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* do this check but it makes me feel better
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*/
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b = _INB_ECTL(ps); /* check to see if port set */
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if( a == b ) {
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DBG( DBG_LOW, "Port is set to (ECP) EPP mode.\n" );
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ps->IO.portMode = _PORT_EPP;
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return _OK;
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} else {
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DBG( DBG_LOW, "Port could not be set to (ECP) EPP mode. "
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"Using SPP mode.\n" );
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_OUTB_ECTL(ps,(Byte)ps->IO.lastPortMode); /* restore */
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_DO_UDELAY(1);
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ps->IO.portMode = _PORT_SPP;
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/* go ahead and try with other settings...*/
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}
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}
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/* If port cannot be set to EPP, try PS2 */
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if((port_feature & PARPORT_MODE_PCECR) &&
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(port_feature & PARPORT_MODE_PCECPPS2)) {
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DBG(DBG_LOW, "Attempting to set PS2 from ECPPS2 mode.\n" );
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a = _INB_ECTL(ps); /* get current ECR */
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ps->IO.lastPortMode = a; /* save it for restoring later */
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/* set to Fast Centronics/bi-directional/PS2 */
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a = (a & 0x1F) | 0x20;
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_OUTB_ECTL(ps,a); /* write it back */
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_DO_UDELAY(1);
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/*
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* It is probably unnecessary to do this check
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* but it makes me feel better
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*/
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b = _INB_ECTL(ps); /* check to see if port set */
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if (a == b) {
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DBG(DBG_LOW, "Port is set to (ECP) PS2 bidirectional mode.\n");
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ps->IO.portMode = _PORT_BIDI;
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return _OK;
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} else {
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DBG(DBG_LOW, "Port could not be set to (ECP) PS2 mode. "
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"Using SPP mode.\n");
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a = ps->IO.lastPortMode & 0x1F;
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_OUTB_ECTL(ps, a); /* set ECP ctrl to SPP */
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_DO_UDELAY(1);
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ps->IO.portMode = _PORT_SPP;
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/* next mode, last attempt... */
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}
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}
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/*
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* Some BIOS/cards have only a Bi-directional/PS2 mode (no EPP).
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* Make one last attemp to set to PS2 mode.
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*/
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if ( port_feature & PARPORT_MODE_PCPS2 ){
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DBG(DBG_LOW, "Attempting to set PS2 mode.\n" );
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a = _INB_CTRL(ps); /* get current setting of control register*/
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ps->IO.lastPortMode = a; /* save it for restoring later */
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a = a | 0x20; /* set bit 5 of control reg */
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_OUTB_CTRL(ps,a); /* set to Fast Centronics/bi-directional/PS2 */
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_DO_UDELAY(1);
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a = 0;
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_OUTB_DATA(ps,0x55);
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_DO_UDELAY(1);
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if ((inb(ps->IO.portBase)) != 0x55) /* read data */
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a++;
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_OUTB_DATA(ps,0xAA);
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_DO_UDELAY(1);
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if (_INB_DATA(ps) != 0xAA) /* read data */
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a++;
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if( 2 == a ) {
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DBG(DBG_LOW, "Port is set to PS2 bidirectional mode.\n");
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ps->IO.portMode = _PORT_BIDI;
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return _OK;
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} else {
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DBG(DBG_LOW, "Port could not be set to PS2 mode. "
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"Using SPP mode.\n");
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_OUTB_CTRL(ps,(Byte)ps->IO.lastPortMode); /* restore */
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_DO_UDELAY(1);
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ps->IO.portMode = _PORT_SPP;
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}
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}
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/* reaching this point, we're back in SPP mode and there's no need
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* to restore at shutdown...
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*/
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ps->IO.lastPortMode = 0xFFFF;
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return _OK;
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}
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/** check the state of the par-port and switch to EPP-mode if possible
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*/
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static int miscSetPortMode( pScanData ps )
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{
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/* try to detect the port settings, SPP seems to work in any case ! */
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port_feature = initPortProbe( ps );
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#ifdef DEBUG
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miscShowPortModes( port_feature );
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#endif
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switch( ps->IO.forceMode ) {
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case 1:
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DBG( DBG_LOW, "Use of SPP-mode enforced\n" );
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ps->IO.portMode = _PORT_SPP;
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return _OK;
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break;
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case 2:
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DBG( DBG_LOW, "Use of EPP-mode enforced\n" );
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ps->IO.portMode = _PORT_EPP;
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return _OK;
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break;
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default:
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break;
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}
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if( !(port_feature & PARPORT_MODE_PCEPP)) {
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if( !(port_feature & PARPORT_MODE_PCSPP )) {
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_PRINT("\nThis Port supports not the SPP- or EPP-Mode\n" );
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_PRINT("Please activate SPP-Mode, EPP-Mode or\nEPP + ECP-Mode!\n");
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return _E_NOSUPP;
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} else {
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DBG(DBG_LOW, "Using SPP-mode\n" );
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ps->IO.portMode = _PORT_SPP;
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}
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} else {
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DBG(DBG_LOW, "Using EPP-mode\n" );
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ps->IO.portMode = _PORT_EPP;
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}
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/* else try to set to a faster mode than SPP */
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return miscSetFastMode( ps );
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}
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#endif
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/** miscNextLongRand() -- generate 2**31-2 random numbers
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**
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** public domain by Ray Gardner
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**
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** based on "Random Number Generators: Good Ones Are Hard to Find",
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** S.K. Park and K.W. Miller, Communications of the ACM 31:10 (Oct 1988),
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** and "Two Fast Implementations of the 'Minimal Standard' Random
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** Number Generator", David G. Carta, Comm. ACM 33, 1 (Jan 1990), p. 87-88
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**
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** linear congruential generator f(z) = 16807 z mod (2 ** 31 - 1)
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**
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** uses L. Schrage's method to avoid overflow problems
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*/
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static Long miscNextLongRand( Long seed )
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{
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ULong lo, hi;
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lo = _PP_A * (Long)(seed & 0xFFFF);
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hi = _PP_A * (Long)((ULong)seed >> 16);
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lo += (hi & 0x7FFF) << 16;
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if (lo > _PP_M) {
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lo &= _PP_M;
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++lo;
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}
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lo += hi >> 15;
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if (lo > _PP_M) {
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lo &= _PP_M;
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++lo;
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}
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return (Long)lo;
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}
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/** initialize the random number generator
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*/
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static void miscSeedLongRand( ULong seed )
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{
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randomnum = seed ? (seed & _PP_M) : 1; /* nonzero seed */
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}
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/************************ exported functions *********************************/
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/** allocate and initialize some memory for the scanner structure
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*/
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_LOC pScanData MiscAllocAndInitStruct( void )
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{
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pScanData ps;
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ps = (pScanData)_KALLOC(sizeof(ScanData), GFP_KERNEL);
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if( NULL != ps ) {
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MiscReinitStruct( ps );
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}
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DBG( DBG_HIGH, "ScanData = 0x%08lx\n", (ULong)ps );
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return ps;
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}
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/** re-initialize the memory for the scanner structure
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*/
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_LOC int MiscReinitStruct( pScanData ps )
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{
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if( NULL == ps )
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return _E_NULLPTR;
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memset( ps, 0, sizeof(ScanData));
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/* first init all constant stuff in ScanData
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*/
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ps->bCurrentSpeed = 1;
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ps->pbMapRed = ps->a_bMapTable;
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ps->pbMapGreen = &ps->a_bMapTable[256];
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ps->pbMapBlue = &ps->a_bMapTable[512];
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ps->sCaps.wIOBase = _NO_BASE;
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/* use memory address to seed the generator */
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miscSeedLongRand((Long)ps);
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DBG( DBG_HIGH, "Init settings done\n" );
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return _OK;
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}
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/** in USER-Mode: probe the specified port and try to get the port-mode
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* in KERNEL-Mode: only use the modes, the driver returns
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*/
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_LOC int MiscInitPorts( pScanData ps, int port )
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{
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#ifdef __KERNEL__
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int status;
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if( NULL == ps )
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return _E_NULLPTR;
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/*
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* Get access to the ports
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*/
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ps->IO.portBase = (UShort)port;
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status = miscSetPortMode(ps);
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if( _OK != status ) {
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ps->sCaps.wIOBase = _NO_BASE;
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ps->IO.portBase = _NO_BASE;
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return status;
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}
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/*
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* the port settings
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*/
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ps->IO.pbSppDataPort = (UShort)port;
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ps->IO.pbStatusPort = (UShort)port+1;
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ps->IO.pbControlPort = (UShort)port+2;
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ps->IO.pbEppDataPort = (UShort)port+4;
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#else
|
|
int mode, mts;
|
|
|
|
if( NULL == ps )
|
|
return _E_NULLPTR;
|
|
|
|
if( SANE_STATUS_GOOD != sanei_pp_getmodes( ps->pardev, &mode )) {
|
|
DBG( DBG_HIGH, "Cannot get port mode!\n" );
|
|
return _E_NO_PORT;
|
|
}
|
|
|
|
ps->IO.portMode = _PORT_NONE;
|
|
mts = -1;
|
|
if( mode & SANEI_PP_MODE_SPP ) {
|
|
DBG( DBG_LOW, "Setting SPP-mode\n" );
|
|
ps->IO.portMode = _PORT_SPP;
|
|
mts = SANEI_PP_MODE_SPP;
|
|
}
|
|
if( mode & SANEI_PP_MODE_BIDI ) {
|
|
DBG( DBG_LOW, "Setting PS/2-mode\n" );
|
|
ps->IO.portMode = _PORT_BIDI;
|
|
mts = SANEI_PP_MODE_BIDI;
|
|
}
|
|
if( mode & SANEI_PP_MODE_EPP ) {
|
|
DBG( DBG_LOW, "Setting EPP-mode\n" );
|
|
ps->IO.portMode = _PORT_EPP;
|
|
mts = SANEI_PP_MODE_EPP;
|
|
}
|
|
if( mode & SANEI_PP_MODE_ECP ) {
|
|
DBG( DBG_HIGH, "ECP detected --> not supported\n" );
|
|
}
|
|
|
|
if( sanei_pp_uses_directio()) {
|
|
DBG( DBG_LOW, "We're using direct I/O\n" );
|
|
} else {
|
|
DBG( DBG_LOW, "We're using libIEEE1284 I/O\n" );
|
|
}
|
|
|
|
if( ps->IO.portMode == _PORT_NONE ) {
|
|
DBG( DBG_HIGH, "None of the portmodes is supported.\n" );
|
|
return _E_NOSUPP;
|
|
}
|
|
|
|
sanei_pp_setmode( ps->pardev, mts );
|
|
_VAR_NOT_USED( port );
|
|
#endif
|
|
return _OK;
|
|
}
|
|
|
|
/** Function to restore the port
|
|
*/
|
|
_LOC void MiscRestorePort( pScanData ps )
|
|
{
|
|
#ifdef __KERNEL__
|
|
if( 0 == ps->IO.pbSppDataPort )
|
|
return;
|
|
#endif
|
|
|
|
DBG(DBG_LOW,"MiscRestorePort()\n");
|
|
|
|
/* don't restore if not necessary */
|
|
if( 0xFFFF == ps->IO.lastPortMode ) {
|
|
DBG(DBG_LOW,"- no need to restore portmode !\n");
|
|
return;
|
|
}
|
|
|
|
/*Restore Port-Mode*/
|
|
#ifdef __KERNEL__
|
|
if( port_feature & PARPORT_MODE_PCECR ){
|
|
_OUTB_ECTL( ps, (Byte)ps->IO.lastPortMode );
|
|
_DO_UDELAY(1);
|
|
} else {
|
|
_OUTB_CTRL( ps, (Byte)ps->IO.lastPortMode );
|
|
_DO_UDELAY(1);
|
|
}
|
|
#else
|
|
if( port_feature & PPA_PROBE_ECR ){
|
|
_OUTB_ECTL(ps,ps->IO.lastPortMode);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/** Initializes a timer.
|
|
* @param timer - pointer to the timer to start
|
|
* @param us - timeout value in micro-seconds
|
|
*/
|
|
_LOC _INL void MiscStartTimer( pTimerDef timer , unsigned long us)
|
|
{
|
|
struct timeval start_time;
|
|
|
|
#ifdef __KERNEL__
|
|
_GET_TIME( &start_time );
|
|
#else
|
|
gettimeofday(&start_time, NULL);
|
|
#endif
|
|
|
|
*timer = start_time.tv_sec * 1000000 + start_time.tv_usec + us;
|
|
}
|
|
|
|
/** Checks if a timer has been expired or not. In Kernel-mode, the scheduler
|
|
* will also be triggered, if the timer has not been expired.
|
|
* @param timer - pointer to the timer to check
|
|
* @return Function returns _E_TIMEOUT when the timer has been expired,
|
|
* otherwise _OK;
|
|
*/
|
|
_LOC _INL int MiscCheckTimer( pTimerDef timer )
|
|
{
|
|
struct timeval current_time;
|
|
|
|
#ifdef __KERNEL__
|
|
_GET_TIME( ¤t_time );
|
|
#else
|
|
gettimeofday(¤t_time, NULL);
|
|
#endif
|
|
|
|
if (current_time.tv_sec * 1000000 + current_time.tv_usec > *timer) {
|
|
return _E_TIMEOUT;
|
|
} else {
|
|
#ifdef __KERNEL__
|
|
schedule();
|
|
/*#else
|
|
sched_yield();
|
|
*/
|
|
#endif
|
|
return _OK;
|
|
}
|
|
}
|
|
|
|
/** Checks the function pointers
|
|
* @param ps - pointer to the scanner data structure.
|
|
* @return Function returns _TRUE if everything is okay and _FALSE if a NULL
|
|
* ptr has been detected.
|
|
*/
|
|
#ifdef DEBUG
|
|
_LOC Bool MiscAllPointersSet( pScanData ps )
|
|
{
|
|
ULong i;
|
|
pULong ptr;
|
|
|
|
for( ptr = (pULong)&ps->OpenScanPath, i = 1;
|
|
ptr <= (pULong)&ps->ReadOneImageLine; ptr++, i++ ) {
|
|
|
|
if( NULL == (pVoid)*ptr ) {
|
|
DBG( DBG_HIGH, "Function pointer not set (pos = %lu) !\n", i );
|
|
return _FALSE;
|
|
}
|
|
}
|
|
|
|
return _TRUE;
|
|
}
|
|
#endif
|
|
|
|
/** registers this driver to use port "portAddr" (KERNEL-Mode only)
|
|
* @param ps - pointer to the scanner data structure.
|
|
* @param portAddr -
|
|
*/
|
|
_LOC int MiscRegisterPort( pScanData ps, int portAddr )
|
|
{
|
|
#ifndef __KERNEL__
|
|
DBG( DBG_LOW, "Assigning port handle %i\n", portAddr );
|
|
ps->pardev = portAddr;
|
|
#else
|
|
|
|
#ifdef LINUX_26
|
|
__ps = ps;
|
|
__pa = portAddr;
|
|
|
|
DBG( DBG_LOW, "Requested port at 0x%02x\n", portAddr );
|
|
|
|
if( parport_register_driver(&pt_drv)) {
|
|
/* Failed; nothing we can do. */
|
|
return _E_REGISTER;
|
|
}
|
|
|
|
#else
|
|
struct parport *pp = NULL;
|
|
|
|
DBG( DBG_LOW, "Requested port at 0x%02x\n", portAddr );
|
|
|
|
pp = parport_enumerate();
|
|
ps->pardev = NULL;
|
|
|
|
if( NULL == pp ) {
|
|
return _E_PORTSEARCH;
|
|
}
|
|
|
|
/* go through the list
|
|
*/
|
|
for( ps->pp = NULL; NULL != pp; ) {
|
|
|
|
if( pp->base == (unsigned long)portAddr ) {
|
|
DBG( DBG_LOW, "Requested port (0x%02x) found\n", portAddr );
|
|
DBG( DBG_LOW, "Port mode reported: (0x%04x)\n", pp->modes );
|
|
ps->pp = pp;
|
|
break;
|
|
}
|
|
pp = pp->next;
|
|
}
|
|
#endif
|
|
|
|
if( NULL == ps->pp ) {
|
|
printk("PORT not found!!!\n");
|
|
return _E_NO_PORT;
|
|
}
|
|
|
|
/*
|
|
* register this device
|
|
*/
|
|
ps->pardev = parport_register_device( ps->pp, "Plustek Driver",
|
|
miscPreemptionCallback, NULL, NULL, 0, (pVoid)ps );
|
|
|
|
if( NULL == ps->pardev ) {
|
|
return _E_REGISTER;
|
|
}
|
|
|
|
DBG( DBG_LOW, "Port for device %lu registered\n", ps->devno );
|
|
#endif
|
|
|
|
portIsClaimed[ps->devno] = 0;
|
|
return _OK;
|
|
}
|
|
|
|
/** unregisters the port from driver
|
|
*/
|
|
_LOC void MiscUnregisterPort( pScanData ps )
|
|
{
|
|
#ifdef __KERNEL__
|
|
if( NULL != ps->pardev ) {
|
|
DBG( DBG_LOW, "Port unregistered\n" );
|
|
parport_unregister_device( ps->pardev );
|
|
}
|
|
#ifdef LINUX_26
|
|
parport_unregister_driver( &pt_drv );
|
|
#endif
|
|
#else
|
|
sanei_pp_close( ps->pardev );
|
|
#endif
|
|
}
|
|
|
|
/** Try to claim the port
|
|
* @param ps - pointer to the scanner data structure.
|
|
* @return Function returns _OK on success, otherwise _E_BUSY.
|
|
*/
|
|
_LOC int MiscClaimPort( pScanData ps )
|
|
{
|
|
if( 0 == portIsClaimed[ps->devno] ) {
|
|
|
|
DBG( DBG_HIGH, "Try to claim the parport\n" );
|
|
#ifdef __KERNEL__
|
|
if( 0 != parport_claim( ps->pardev )) {
|
|
#else
|
|
if( SANE_STATUS_GOOD != sanei_pp_claim( ps->pardev )) {
|
|
#endif
|
|
return _E_BUSY;
|
|
}
|
|
}
|
|
portIsClaimed[ps->devno]++;
|
|
return _OK;
|
|
}
|
|
|
|
/** Release previously claimed port
|
|
* @param ps - pointer to the scanner data structure
|
|
*/
|
|
_LOC void MiscReleasePort( pScanData ps )
|
|
{
|
|
if( portIsClaimed[ps->devno] > 0 ) {
|
|
portIsClaimed[ps->devno]--;
|
|
|
|
if( 0 == portIsClaimed[ps->devno] ) {
|
|
DBG( DBG_HIGH, "Releasing parport\n" );
|
|
#ifdef __KERNEL__
|
|
parport_release( ps->pardev );
|
|
#else
|
|
sanei_pp_release( ps->pardev );
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
/** Get random number
|
|
* @return a random number.
|
|
*/
|
|
_LOC Long MiscLongRand( void )
|
|
{
|
|
randomnum = miscNextLongRand( randomnum );
|
|
|
|
return randomnum;
|
|
}
|
|
|
|
/** According to the id, the function returns a pointer to the model name
|
|
* @param id - internal id of the various scanner models.
|
|
* @return a pointer to the model-string.
|
|
*/
|
|
_LOC const char *MiscGetModelName( UShort id )
|
|
{
|
|
DBG( DBG_HIGH, "MiscGetModelName - id = %i\n", id );
|
|
|
|
if( MODEL_OP_PT12 < id )
|
|
return ModelStr[0];
|
|
|
|
return ModelStr[id];
|
|
}
|
|
|
|
/* END PLUSTEK-PP_MISC.C ....................................................*/
|