forked from Imagelibrary/rtems
65c6425de9
These modifications were required by hand after running the script. In some cases, the file names did not match patterns. In others, the format of the file did not match any common patterns.
239 lines
8.4 KiB
C
239 lines
8.4 KiB
C
/*===============================================================*\
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| File: termios_printk.c |
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+-----------------------------------------------------------------+
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| Copyright (c) 2002 IMD |
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| Ingenieurbuero fuer Microcomputertechnik Th. Doerfler |
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| Hebststr. 8, 82178 Puchheim, Germany |
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| <Thomas.Doerfler@imd-systems.de> |
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| The license and distribution terms for this file may be |
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| found in the file LICENSE in this distribution or at |
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| http://www.rtems.com/license/LICENSE. |
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| all rights reserved |
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+-----------------------------------------------------------------+
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| TERMIOS printk support |
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| this module performs low-level printk output using |
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| a polled termios driver |
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| |
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+-----------------------------------------------------------------+
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| date history ID |
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| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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| 13.05.02 creation doe |
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|*****************************************************************|
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\*===============================================================*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems.h>
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#include <rtems/libio_.h>
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#include <errno.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <termios.h>
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#include <rtems/termiostypes.h>
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#include <rtems/bspIo.h>
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#include <rtems/termios_printk.h>
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/*
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* internal variables
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*/
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int termios_printk_fd = -1;
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struct rtems_termios_tty *termios_printk_tty;
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static void _termios_printk_null_char(
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char c __attribute__((unused)))
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{
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return;
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}
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BSP_output_char_function_type BSP_output_char = _termios_printk_null_char;
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BSP_polling_getchar_function_type BSP_poll_char;
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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void termios_printk_outputchar
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| send one character to serial port |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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(
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char c /* character to print */
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)
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| <none> |
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\*=========================================================================*/
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{
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static const char cr = '\r';
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/*
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* check, whether printk serial port is available
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*/
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if ((termios_printk_tty != NULL) &&
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(termios_printk_tty->device.write != NULL)) {
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/*
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* call termios_printk polling callout, if available
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*/
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if (termios_printk_conf.callout != NULL) {
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termios_printk_conf.callout();
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}
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/*
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* send character to debug serial port
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*/
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if (c == '\n') {
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termios_printk_tty->device.write(termios_printk_tty->minor,&cr,1);
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}
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termios_printk_tty->device.write(termios_printk_tty->minor,&c,1);
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}
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}
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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int termios_printk_inputchar
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| wait for one character from serial port |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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(
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void /* none */
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)
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| received character |
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\*=========================================================================*/
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{
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int c = -1;
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/*
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* check, whether debug serial port is available
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*/
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if ((termios_printk_tty != NULL) &&
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(termios_printk_tty->device.pollRead != NULL)) {
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do {
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/*
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* call termios_printk polling callout, if available
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*/
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if (termios_printk_conf.callout != NULL) {
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termios_printk_conf.callout();
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}
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/*
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* get character from debug serial port
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*/
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c = termios_printk_tty->device.pollRead(termios_printk_tty->minor);
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} while (c < 0);
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}
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return c;
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}
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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int termios_printk_open
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| try to open given serial debug port |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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(
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const char *dev_name, /* name of device to open */
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uint32_t baudrate /* baud rate to use */
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)
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| 0 on success, -1 and errno otherwise |
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\*=========================================================================*/
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{
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bool err_occurred = false;
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rtems_libio_t *iop = NULL;
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struct termios act_termios;
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tcflag_t baudcode = B0;
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if (termios_printk_fd >= 0) {
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/*
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* already initialized
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*/
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return 0;
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}
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/*
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* translate baudrate into baud code
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*/
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switch(baudrate) {
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case 50: baudcode = B50; break;
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case 75: baudcode = B75; break;
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case 110: baudcode = B110; break;
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case 134: baudcode = B134; break;
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case 150: baudcode = B150; break;
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case 200: baudcode = B200; break;
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case 300: baudcode = B300; break;
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case 600: baudcode = B600; break;
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case 1200: baudcode = B1200; break;
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case 1800: baudcode = B1800; break;
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case 2400: baudcode = B2400; break;
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case 4800: baudcode = B4800; break;
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case 9600: baudcode = B9600; break;
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case 19200: baudcode = B19200; break;
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case 38400: baudcode = B38400; break;
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case 57600: baudcode = B57600; break;
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case 115200: baudcode = B115200; break;
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case 230400: baudcode = B230400; break;
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case 460800: baudcode = B460800; break;
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default : err_occurred = true; errno = EINVAL; break;
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}
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/*
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* open device for serdbg operation
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*/
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if (!err_occurred &&
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(dev_name != NULL) &&
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(dev_name[0] != '\0')) {
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termios_printk_fd = open(dev_name,O_RDWR);
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if (termios_printk_fd < 0) {
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err_occurred = true;
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}
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}
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/*
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* capture tty structure
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*/
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if (!err_occurred) {
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iop = &rtems_libio_iops[termios_printk_fd];
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termios_printk_tty = iop->data1;
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}
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/*
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* set device baudrate
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* (and transp mode, this is not really needed)
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* ...
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*/
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/*
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* ... get fd settings
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*/
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if (!err_occurred &&
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(0 != tcgetattr(termios_printk_fd,&act_termios))) {
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err_occurred = true;
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}
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if (!err_occurred) {
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cfsetospeed(&act_termios,baudcode);
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cfsetispeed(&act_termios,baudcode);
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if (0 != tcsetattr(termios_printk_fd,TCSANOW,&act_termios)) {
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err_occurred = true;
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}
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}
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if (!err_occurred) {
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BSP_output_char = termios_printk_outputchar;
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BSP_poll_char = termios_printk_inputchar;
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}
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return (err_occurred
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? -1
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: 0);
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}
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