forked from Imagelibrary/rtems
95 lines
1.8 KiB
C
95 lines
1.8 KiB
C
/**
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* @file
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*
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* @ingroup libmisc_devnull Device Driver
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*
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* @brief Devzero
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*/
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/*
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* Copyright (c) 2011 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Obere Lagerstr. 30
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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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.rtems.org/license/LICENSE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/devzero.h>
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#include <string.h>
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#include <rtems/libio.h>
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rtems_device_driver dev_zero_initialize(
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rtems_device_major_number major,
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rtems_device_minor_number minor RTEMS_UNUSED,
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void *arg RTEMS_UNUSED
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)
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{
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return rtems_io_register_name(DEVZERO_DEVICE_NAME, major, 0);
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}
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rtems_device_driver dev_zero_open(
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rtems_device_major_number major RTEMS_UNUSED,
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rtems_device_minor_number minor RTEMS_UNUSED,
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void *arg RTEMS_UNUSED
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)
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{
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return RTEMS_SUCCESSFUL;
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}
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rtems_device_driver dev_zero_close(
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rtems_device_major_number major RTEMS_UNUSED,
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rtems_device_minor_number minor RTEMS_UNUSED,
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void *arg RTEMS_UNUSED
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)
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{
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return RTEMS_SUCCESSFUL;
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}
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rtems_device_driver dev_zero_read(
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rtems_device_major_number major RTEMS_UNUSED,
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rtems_device_minor_number minor RTEMS_UNUSED,
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void *arg RTEMS_UNUSED
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)
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{
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rtems_libio_rw_args_t *rw = arg;
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rw->bytes_moved = rw->count;
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memset(rw->buffer, 0, rw->count);
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return RTEMS_SUCCESSFUL;
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}
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rtems_device_driver dev_zero_write(
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rtems_device_major_number major RTEMS_UNUSED,
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rtems_device_minor_number minor RTEMS_UNUSED,
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void *arg
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)
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{
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rtems_libio_rw_args_t *rw = arg;
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rw->bytes_moved = rw->count;
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return RTEMS_SUCCESSFUL;
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}
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rtems_device_driver dev_zero_control(
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rtems_device_major_number major RTEMS_UNUSED,
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rtems_device_minor_number minor RTEMS_UNUSED,
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void *arg RTEMS_UNUSED
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)
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{
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return RTEMS_IO_ERROR;
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}
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