/*
* This file contains the template for a console IO package.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#define NO_BSP_INIT
/* only one of the following can be defined */
#define SERIAL_INPUT /* use serial input */
/* #define HIF_INPUT */ /* use HIF input */
#if defined(SERIAL_INPUT) && defined(HIF_INPUT)
#error SERIAL_INPUT and HIF_INPUT cannot both be defined!!!
#endif
/* both of the following can be defined */
#define SERIAL_OUTPUT /* remove to disable serial port console output */
/* #define HIF_OUTPUT */ /* remove to disable HIF console output */
#include <bsp.h>
#include <rtems/libio.h>
#include "serial.h"
#include "concntl.h"
#ifndef lint
static char _sccsid[] = "@(#)console.c 09/12/96 1.13\n";
#endif
/* console_initialize
*
* This routine initializes the console IO driver.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values:
*/
rtems_device_driver console_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code status;
if ( arg )
{
if ( console_duartinit(minor,*(unsigned32*)arg) )
return RTEMS_INVALID_NUMBER;
}
else
{
if ( console_duartinit(1,9600) || console_duartinit(0,9600) )
{
return RTEMS_INVALID_NUMBER;
}
}
status = rtems_io_register_name(
"/dev/console",
major,
(rtems_device_minor_number) 0
);
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
return RTEMS_SUCCESSFUL;
}
/* is_character_ready
*
* This routine returns TRUE if a character is available.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values:
*/
rtems_boolean is_character_ready(
char *ch
)
{
*ch = '\0'; /* return NULL for no particular reason */
return(TRUE);
}
/* inbyte
*
* This routine reads a character from the SOURCE.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values:
* character read from SOURCE
*/
char inbyte( unsigned int minor )
{
/*
* If polling, wait until a character is available.
*/
#ifdef HIF_INPUT
char retch;
_read( 1, &retch, 1 );
return retch;
#endif
#ifdef SERIAL_INPUT
return console_sps_getc( minor );
#endif
}
/* outbyte
*
* This routine transmits a character out the SOURCE. It may support
* XON/XOFF flow control.
*
* Input parameters:
* ch - character to be transmitted
*
* Output parameters: NONE
*/
void outbyte( unsigned int minor,
char ch
)
{
/*
* If polling, wait for the transmitter to be ready.
* Check for flow control requests and process.
* Then output the character.
*/
#ifdef SERIAL_OUTPUT
console_sps_putc( minor, ch );
#endif
/*
* Carriage Return/New line translation.
*/
if ( ch == '\n' )
outbyte( minor, '\r' );
}
/*
* Open entry point
*/
rtems_device_driver console_open(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
return RTEMS_SUCCESSFUL;
}
/*
* Close entry point
*/
rtems_device_driver console_close(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
return RTEMS_SUCCESSFUL;
}
/*
* read bytes from the serial port. We only have stdin.
*/
rtems_device_driver console_read(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
rtems_libio_rw_args_t *rw_args;
unsigned8 *buffer;
unsigned32 maximum;
unsigned32 count = 0;
rw_args = (rtems_libio_rw_args_t *) arg;
buffer = rw_args->buffer;
maximum = rw_args->count;
for (count = 0; count < maximum; count++) {
buffer[ count ] = inbyte(minor);
if (buffer[ count ] == '\n' || buffer[ count ] == '\r') {
buffer[ count++ ] = '\n';
outbyte( minor, '\n' ); /* newline */
break;
}
else if (buffer[ count ] == '\b' && count > 0 )
{
outbyte( minor, '\b' ); /* move back one space */
outbyte( minor, ' ' ); /* erase the character */
outbyte( minor, '\b' ); /* move back one space */
count-=2;
}
else
outbyte( minor, buffer[ count ] ); /* echo the character */
}
rw_args->bytes_moved = count;
return (count > 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED;
}
/*
* write bytes to the serial port. Stdout and stderr are the same.
*/
rtems_device_driver console_write(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
int count;
int maximum;
rtems_libio_rw_args_t *rw_args;
unsigned8 *buffer;
rw_args = (rtems_libio_rw_args_t *) arg;
buffer = rw_args->buffer;
maximum = rw_args->count;
#ifdef HIF_OUTPUT
_write( 0, buffer, maximum );
#endif
#ifdef SERIAL_OUTPUT
for (count = 0; count < maximum; count++) {
if ( buffer[ count ] == '\n') {
outbyte(minor,'\r');
}
outbyte( minor,buffer[ count ] );
}
#endif
rw_args->bytes_moved = maximum;
return 0;
}
/*
* IO Control entry point
*/
rtems_device_driver console_control(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
if (!arg)
return RTEMS_INVALID_ADDRESS;
switch( ((console_ioctl_request_t *)arg)->ioctl_type )
{
case CON_KBHIT:
/* check if keyboard was hit */
((console_ioctl_request_t *)arg)->param = console_sps_kbhit(minor);
break;
case CON_GET_RAW_BYTE:
((console_ioctl_request_t *)arg)->param = inbyte(minor);
break;
case CON_SEND_RAW_BYTE:
outbyte(minor, ((console_ioctl_request_t *)arg)->param);
break;
default:
break;
}
return RTEMS_SUCCESSFUL;
}
