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132 lines
4.9 KiB
132 lines
4.9 KiB
/**************************************************************************** |
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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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