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/*
* This file contains the MVME147 console IO package.
*
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* MVME147 port for TNI - Telecom Bretagne
* by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
* May 1996
*
* This file was taken from the DMV152 bsp
*
* $Id$
*/
#define M147_INIT
#include <bsp.h>
#include <rtems/libio.h>
#include <z8530.h>
/* 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;
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
)
{
rtems_unsigned8 rr_0;
for ( ; ; ) {
Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
if ( !(rr_0 & RR_0_RX_DATA_AVAILABLE) )
return( FALSE );
Z8x30_READ_DATA( CONSOLE_DATA, *ch );
return( TRUE );
}
}
/* inbyte
*
* This routine reads a character from the SCC.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values:
* character read from SCC
*/
char inbyte( void )
{
rtems_unsigned8 rr_0;
char ch;
for ( ; ; ) {
Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) != 0 )
break;
}
Z8x30_READ_DATA( CONSOLE_DATA, ch );
return ( ch );
}
/* outbyte
*
* This routine transmits a character out the SCC. It supports
* XON/XOFF flow control.
*
* Input parameters:
* ch - character to be transmitted
*
* Output parameters: NONE
*/
void outbyte(
char ch
)
{
rtems_unsigned8 rr_0;
char flow_control;
for ( ; ; ) {
Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
if ( (rr_0 & RR_0_TX_BUFFER_EMPTY) != 0 )
break;
}
for ( ; ; ) {
Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 )
break;
Z8x30_READ_DATA( CONSOLE_DATA, flow_control );
if ( flow_control == XOFF )
do {
do {
Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
} while ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 );
Z8x30_READ_DATA( CONSOLE_DATA, flow_control );
} while ( flow_control != XON );
}
Z8x30_WRITE_DATA( CONSOLE_DATA, ch );
}
/*
* 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;
char *buffer;
int maximum;
int 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();
if (buffer[ count ] == '\n' || buffer[ count ] == '\r') {
buffer[ count++ ] = '\n';
buffer[ count ] = 0;
break;
}
}
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;
char *buffer;
rw_args = (rtems_libio_rw_args_t *) arg;
buffer = rw_args->buffer;
maximum = rw_args->count;
for (count = 0; count < maximum; count++) {
if ( buffer[ count ] == '\n') {
outbyte('\r');
}
outbyte( buffer[ count ] );
}
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
)
{
return RTEMS_SUCCESSFUL;
}
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