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iodev.c

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/****************************************************************
  File: iodev.c

  Author: Steven Legowik

  Description:
    Device driver to allow access to PC IO space without
    requiring root permission of executing program.
****************************************************************/

#include "iodev.h"
#include "pcio.h"

int iodev_open()
{
  return( OK );
}

int iodev_close()
{
  return( OK );
}

int iodev_read( char *s,
                struct file *f,
                char *buff,
                int count )
{
  pseterr( ENXIO );
  return( SYSERR );             /* read is not valid operation */
}

int iodev_write( char *s,
                struct file *f,
                char *buff,
                int count )
{
  pseterr( ENXIO );
  return( SYSERR );             /* write is not valid operation */
}

int iodev_ioctl(char *s,
                struct file *f,
                int command,
                struct _ioValStruct *arg )
{
  switch( command )
  {
  case READ_8:
    arg->value = inputb( arg->address );
    break;
  case WRITE_8:
    outputb( arg->address, arg->value );
    break;
  case READ_16:
    arg->value = inputw( arg->address );
    break;
  case WRITE_16:
    outputw( arg->address, arg->value );
    break;
  case READ_32:
    arg->value = inputl( arg->address );
    break;
  case WRITE_32:
    outputl( arg->address, arg->value );
    break;
  }

  return( 0 );
}

int iodev_select()
{
  return( OK );
}

int iodev_install()
{
  return( 0 );
}

int iodev_uninstall()
{
  return( OK );
}

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