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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [sh/] [shared/] [console.c] - Blame information for rev 493

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1 30 unneback 
/*
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 * /dev/console for Hitachi SH 703X
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 *
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 * The SH doesn't have a designated console device. Therefore we "alias"
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 * another device as /dev/console and revector all calls to /dev/console
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 * to this device.
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 *
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 * This approach is similar to installing a sym-link from one device to
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 * another device. If rtems once will support sym-links for devices files,
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 * this implementation could be dropped.
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 *
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 *  Author: Ralf Corsepius (corsepiu@faw.uni-ulm.de)
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 *
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 *  COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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 *
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 *
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 *  COPYRIGHT (c) 1998.
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 *  On-Line Applications Research Corporation (OAR).
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 *  Copyright assigned to U.S. Government, 1994.
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: console.c,v 1.2 2001-09-27 12:01:12 chris Exp $
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 */
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#include <bsp.h>
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#include <rtems.h>
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#include <rtems/libio.h>
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#include <iosupp.h>
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#ifndef BSP_CONSOLE_DEVNAME
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#error Missing BSP_CONSOLE_DEVNAME
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#endif
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static rtems_driver_name_t *low_level_device_info = NULL ;
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/*  console_initialize
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 *
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 *  This routine initializes the console IO driver.
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 *
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 *  Input parameters: NONE
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 *
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 *  Output parameters:  NONE
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 *
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 *  Return values:
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 */
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rtems_device_driver console_initialize(
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  rtems_device_major_number  major,
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  rtems_device_minor_number  minor,
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  void                      *arg
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)
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{
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  rtems_device_driver status ;
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  status = rtems_io_register_name(
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    "/dev/console",
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    major,
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    (rtems_device_minor_number) 0
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  );
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  if (status != RTEMS_SUCCESSFUL)
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    rtems_fatal_error_occurred(status);
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  status = rtems_io_lookup_name( BSP_CONSOLE_DEVNAME,
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    &low_level_device_info );
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  if (status != RTEMS_SUCCESSFUL)
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    rtems_fatal_error_occurred(status);
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  return RTEMS_SUCCESSFUL;
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}
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/*
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 *  Open entry point
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 */
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rtems_device_driver console_open(
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  rtems_device_major_number major,
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  rtems_device_minor_number minor,
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  void                    * arg
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)
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{
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  return rtems_io_open( low_level_device_info->major,
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    low_level_device_info->minor,
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    arg );
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}
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/*
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 *  Close entry point
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 */
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rtems_device_driver console_close(
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  rtems_device_major_number major,
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  rtems_device_minor_number minor,
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  void                    * arg
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)
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{
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  return rtems_io_close( low_level_device_info->major,
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    low_level_device_info->minor,
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    arg );
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}
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/*
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 * read bytes from the serial port. We only have stdin.
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 */
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rtems_device_driver console_read(
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  rtems_device_major_number major,
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  rtems_device_minor_number minor,
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  void                    * arg
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)
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{
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  return rtems_io_read( low_level_device_info->major,
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    low_level_device_info->minor,
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    arg );
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}
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/*
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 * write bytes to the serial port. Stdout and stderr are the same.
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 */
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rtems_device_driver console_write(
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  rtems_device_major_number major,
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  rtems_device_minor_number minor,
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  void                    * arg
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)
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{
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  return rtems_io_write( low_level_device_info->major,
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    low_level_device_info->minor,
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    arg );
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}
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/*
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 *  IO Control entry point
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 */
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rtems_device_driver console_control(
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  rtems_device_major_number major,
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  rtems_device_minor_number minor,
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  void                    * arg
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)
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{
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  return rtems_io_control( low_level_device_info->major,
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    low_level_device_info->minor,
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    arg );
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}

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