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/**
* @file
*
* @ingroup libmisc_devnull Device Driver
*
* @brief Devzero
*/
/*
* Copyright (c) 2011 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/devzero.h>
#include <string.h>
#include <rtems/libio.h>
rtems_device_driver dev_zero_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor RTEMS_UNUSED,
void *arg RTEMS_UNUSED
)
{
return rtems_io_register_name(DEVZERO_DEVICE_NAME, major, 0);
}
rtems_device_driver dev_zero_open(
rtems_device_major_number major RTEMS_UNUSED,
rtems_device_minor_number minor RTEMS_UNUSED,
void *arg RTEMS_UNUSED
)
{
return RTEMS_SUCCESSFUL;
}
rtems_device_driver dev_zero_close(
rtems_device_major_number major RTEMS_UNUSED,
rtems_device_minor_number minor RTEMS_UNUSED,
void *arg RTEMS_UNUSED
)
{
return RTEMS_SUCCESSFUL;
}
rtems_device_driver dev_zero_read(
rtems_device_major_number major RTEMS_UNUSED,
rtems_device_minor_number minor RTEMS_UNUSED,
void *arg RTEMS_UNUSED
)
{
rtems_libio_rw_args_t *rw = arg;
rw->bytes_moved = rw->count;
memset(rw->buffer, 0, rw->count);
return RTEMS_SUCCESSFUL;
}
rtems_device_driver dev_zero_write(
rtems_device_major_number major RTEMS_UNUSED,
rtems_device_minor_number minor RTEMS_UNUSED,
void *arg
)
{
rtems_libio_rw_args_t *rw = arg;
rw->bytes_moved = rw->count;
return RTEMS_SUCCESSFUL;
}
rtems_device_driver dev_zero_control(
rtems_device_major_number major RTEMS_UNUSED,
rtems_device_minor_number minor RTEMS_UNUSED,
void *arg RTEMS_UNUSED
)
{
return RTEMS_IO_ERROR;
}
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