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/****************************************************************************
* drivers/lowconsole.c
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/fs.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* The architecture must provide up_putc for this driver */
#ifndef CONFIG_ARCH_LOWPUTC
# error "Architecture must provide up_putc() for this driver"
#endif
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static ssize_t lowconsole_read(struct file *filep, char *buffer, size_t buflen);
static ssize_t lowconsole_write(struct file *filep, const char *buffer, size_t buflen);
static int lowconsole_ioctl(struct file *filep, int cmd, unsigned long arg);
/****************************************************************************
* Private Variables
****************************************************************************/
struct file_operations g_serialops =
{
0, /* open */
0, /* close */
lowconsole_read, /* read */
lowconsole_write, /* write */
0, /* seek */
lowconsole_ioctl /* ioctl */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lowconsole_ioctl
****************************************************************************/
static int lowconsole_ioctl(struct file *filep, int cmd, unsigned long arg)
{
return -ENOTTY;
}
/****************************************************************************
* Name: lowconsole_read
****************************************************************************/
static ssize_t lowconsole_read(struct file *filep, char *buffer, size_t buflen)
{
return 0;
}
/****************************************************************************
* Name: lowconsole_write
****************************************************************************/
static ssize_t lowconsole_write(struct file *filep, const char *buffer, size_t buflen)
{
ssize_t ret = buflen;
for (; buflen; buflen--)
{
up_putc(*buffer++);
}
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lowconsole_init
****************************************************************************/
void lowconsole_init(void)
{
(void)register_driver("/dev/console", &g_serialops, 0666, NULL);
}
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