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/*
* This file contains the MVME162 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 be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* Modifications of respective RTEMS file: COPYRIGHT (c) 1994.
* EISCAT Scientific Association. M.Savitski
*
* This material is a part of the MVME162 Board Support Package
* for the RTEMS executive. Its licensing policies are those of the
* RTEMS above.
*
* $Id$
*/
#define M162_INIT
#include <bsp.h>
#include <rtems/libio.h>
#include <ringbuf.h>
Ring_buffer_t Buffer[2];
/*
* Interrupt handler for receiver interrupts
*/
rtems_isr C_Receive_ISR(rtems_vector_number vector)
{
register int ipend, port;
ZWRITE0(1, 0x38); /* reset highest IUS */
ipend = ZREAD(1, 3); /* read int pending from A side */
if (ipend == 0x04) port = 0; /* channel B intr pending */
else if (ipend == 0x20) port = 1; /* channel A intr pending */
else return;
Ring_buffer_Add_character(&Buffer[port], ZREADD(port));
if (ZREAD(port, 1) & 0x70) { /* check error stat */
ZWRITE0(port, 0x30); /* reset error */
}
}
rtems_device_driver console_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
int i;
rtems_status_code status;
/*
* Initialise receiver interrupts on both ports
*/
for (i = 0; i <= 1; i++) {
Ring_buffer_Initialize( &Buffer[i] );
ZWRITE(i, 2, SCC_VECTOR);
ZWRITE(i, 10, 0);
ZWRITE(i, 1, 0x10); /* int on all Rx chars or special condition */
ZWRITE(i, 9, 8); /* master interrupt enable */
}
set_vector(C_Receive_ISR, SCC_VECTOR, 1); /* install ISR for ports A and B */
mcchip->vector_base = 0;
mcchip->gen_control = 2; /* MIEN */
mcchip->SCC_int_ctl = 0x13; /* SCC IEN, IPL3 */
status = rtems_io_register_name(
"/dev/console",
major,
(rtems_device_minor_number) 1
);
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
status = rtems_io_register_name(
"/dev/tty00",
major,
(rtems_device_minor_number) 0
);
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
status = rtems_io_register_name(
"/dev/tty01",
major,
(rtems_device_minor_number) 1
);
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
return RTEMS_SUCCESSFUL;
}
/*
* Non-blocking char input
*/
rtems_boolean char_ready(int port, char *ch)
{
if ( Ring_buffer_Is_empty( &Buffer[port] ) )
return FALSE;
Ring_buffer_Remove_character( &Buffer[port], *ch );
return TRUE;
}
/*
* Block on char input
*/
char inbyte(int port)
{
unsigned char tmp_char;
while ( !char_ready(port, &tmp_char) );
return tmp_char;
}
/*
* This routine transmits a character out the SCC. It no longer supports
* XON/XOFF flow control.
*/
void outbyte(char ch, int port)
{
while (1) {
if (ZREAD0(port) & TX_BUFFER_EMPTY) break;
}
ZWRITED(port, 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;
if ( minor > 1 )
return RTEMS_INVALID_NUMBER;
for (count = 0; count < maximum; count++) {
buffer[ count ] = inbyte( minor );
if (buffer[ count ] == '\n' || buffer[ count ] == '\r') {
buffer[ count++ ] = '\n';
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;
if ( minor > 1 )
return RTEMS_INVALID_NUMBER;
for (count = 0; count < maximum; count++) {
if ( buffer[ count ] == '\n') {
outbyte('\r', minor );
}
outbyte( buffer[ count ], minor );
}
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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