133 lines
4.9 KiB
C
133 lines
4.9 KiB
C
/****************************************************************************
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* drivers/serial/lowconsole.c
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*
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* Copyright (C) 2008-2009, 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/fs/fs.h>
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* The architecture must provide up_putc for this driver */
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#ifndef CONFIG_ARCH_LOWPUTC
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# error "Architecture must provide up_putc() for this driver"
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#endif
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static ssize_t lowconsole_read(struct file *filep, char *buffer, size_t buflen);
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static ssize_t lowconsole_write(struct file *filep, const char *buffer, size_t buflen);
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static int lowconsole_ioctl(struct file *filep, int cmd, unsigned long arg);
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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static const struct file_operations g_consoleops =
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{
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0, /* open */
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0, /* close */
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lowconsole_read, /* read */
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lowconsole_write, /* write */
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0, /* seek */
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lowconsole_ioctl /* ioctl */
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#ifndef CONFIG_DISABLE_POLL
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, 0 /* poll */
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#endif
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lowconsole_ioctl
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****************************************************************************/
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static int lowconsole_ioctl(struct file *filep, int cmd, unsigned long arg)
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{
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return -ENOTTY;
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}
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/****************************************************************************
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* Name: lowconsole_read
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****************************************************************************/
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static ssize_t lowconsole_read(struct file *filep, char *buffer, size_t buflen)
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{
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return 0;
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}
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/****************************************************************************
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* Name: lowconsole_write
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****************************************************************************/
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static ssize_t lowconsole_write(struct file *filep, const char *buffer, size_t buflen)
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{
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ssize_t ret = buflen;
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for (; buflen; buflen--)
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{
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up_putc(*buffer++);
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}
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return ret;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lowconsole_init
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****************************************************************************/
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void lowconsole_init(void)
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{
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(void)register_driver("/dev/console", &g_consoleops, 0666, NULL);
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}
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