opencbm: ppread.c Source File

00001 /*
00002  *  This program is free software; you can redistribute it and/or
00003  *  modify it under the terms of the GNU General Public License
00004  *  as published by the Free Software Foundation; either version
00005  *  2 of the License, or (at your option) any later version.
00006  *
00007  *  Copyright 1999-2004 Michael Klein <michael(dot)klein(at)puffin(dot)lb(dot)shuttle(dot)de>
00008  *  Copyright 2001-2004 Spiro Trikaliotis
00009  *
00010  */
00011 
00023 #include <wdm.h>
00024 #include "cbm_driver.h"
00025 #include "i_iec.h"
00026 
00042 NTSTATUS
00043 cbmiec_pp_read(IN PDEVICE_EXTENSION Pdx, OUT UCHAR *Return)
00044 {
00045     FUNC_ENTER();
00046 
00047     if (!(Pdx->IecOutBits & PP_LP_BIDIR))
00048     {
00049         WRITE_PORT_UCHAR(PAR_PORT, 0xFF);
00050         CBMIEC_SET(PP_LP_BIDIR);
00051     }
00052 
00053     *Return = READ_PORT_UCHAR(PAR_PORT);
00054 
00055     FUNC_LEAVE_NTSTATUS_CONST(STATUS_SUCCESS);
00056 }