34b7ebdf68
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4500 42af7a65-404d-4744-a932-0658087f49c3
117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
/****************************************************************************
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* arch/x86/src/qemu/qemu_serial.c
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*
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* Copyright (C) 2011-2012 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 <nuttx/arch.h>
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#include <nuttx/serial/uart_16550.h>
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#include <arch/io.h>
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#include "up_internal.h"
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/* This is a "stub" file to suppport up_putc if no real serial driver is
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* configured. Normally, drivers/serial/uart_16550.c provides the serial
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* driver for this platform.
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*/
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#ifdef USE_SERIALDRIVER
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: uart_getreg(), uart_putreg()
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*
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* Description:
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* These functions must be provided by the processor-specific code in order
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* to correctly access 16550 registers
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*
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****************************************************************************/
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uart_datawidth_t uart_getreg(uart_addrwidth_t base, unsigned int offset)
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{
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return inb(base + offset);
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}
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void uart_putreg(uart_addrwidth_t base, unsigned int offset, uart_datawidth_t value)
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{
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outb(value, base + offset);
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}
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#else /* USE_SERIALDRIVER */
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/****************************************************************************
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* Name: up_putc
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*
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* Description:
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* Provide priority, low-level access to support OS debug writes
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*
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****************************************************************************/
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int up_putc(int ch)
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{
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/* Check for LF */
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if (ch == '\n')
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{
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/* Add CR */
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up_lowputc('\r');
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}
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up_lowputc(ch);
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return ch;
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}
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#endif /* USE_SERIALDRIVER */
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