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Converted to termios style device driver.

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This commit is contained in:
Joel Sherrill
1997-10-21 18:38:24 +00:00
parent cdfd74a538
commit a7e2729c61
1 changed files with 146 additions and 267 deletions
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413
c/src/lib/libbsp/sparc/erc32/console/console.c
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@@ -1,7 +1,7 @@
/*
* console.c
* This file contains the TTY driver for the serial ports on the erc32.
*
* This file contains the Sparc Instruction Simulator Console driver.
* This driver uses the termios pseudo driver.
*
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
@@ -11,36 +11,24 @@
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* Ported to ERC32 implementation of the SPARC by On-Line Applications
* Research Corporation (OAR) under contract to the European Space
* Agency (ESA).
*
* ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995.
* European Space Agency.
*
* $Id$
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <stdlib.h>
#include <assert.h>
/*
* Define RDB_BREAK_IN if you need to be able to break in to the
* program with a ctrl-c during remote target debugging. If so,
* UART B will not be accessible from rtems during remote debugging
* if interrupt driven console is used. Does not affect UART A, polled
* mode or when the program runs without remote debugging.
*/
#define RDB_BREAK_IN
#undef CONSOLE_USE_POLLED
#define CONSOLE_USE_INTERRUPTS
/*
* Should we use a polled or interrupt drived console?
*
* NOTE: Define only one of these by default.
* NOTE: This is defined in the custom/erc32.cfg file.
*
* WARNING: As of sis 1.6, it did not appear that the UART interrupts
* WARNING: In sis 1.6, it did not appear that the UART interrupts
* worked in a desirable fashion. Immediately upon writing
* a character into the TX buffer, an interrupt was generated.
* This did not allow enough time for the program to put more
@@ -49,103 +37,13 @@
* in a polled console with a useless interrupt per character
* on output. It is reasonable to assume that input does not
* share this problem although it was not investigated.
*
*/
#ifdef CONSOLE_USE_POLLED
#define OUTBYTE console_outbyte_polled
#define INBYTE console_inbyte_polled
#else
#define OUTBYTE console_outbyte_interrupts
#define INBYTE console_inbyte_interrupts
#endif
void console_initialize_interrupts( void );
/* console_initialize
/*
* console_outbyte_polled
*
* This routine initializes the console IO driver.
*
* Input parameters:
* major - console device major number
* minor - console device minor number
* arg - pointer to optional device driver arguments
*
* Output parameters: NONE
*
* Return values:
* rtems_device_driver status code
*/
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);
#ifdef CONSOLE_USE_INTERRUPTS
console_initialize_interrupts();
#endif
return RTEMS_SUCCESSFUL;
}
/* console_inbyte_polled
*
* This routine reads a character from the UART.
*
* Input parameters:
* port - port to read character from
*
* Output parameters: NONE
*
* Return values:
* character read from UART
*/
char console_inbyte_polled( int port )
{
int UStat;
if ( port == 0 ) {
while (((UStat = ERC32_MEC.UART_Status) & ERC32_MEC_UART_STATUS_DRA) == 0 )
if (UStat & ERC32_MEC_UART_STATUS_ERRA) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRA;
ERC32_MEC.Control = ERC32_MEC.Control;
}
return (int) ERC32_MEC.UART_Channel_A;
}
while (((UStat = ERC32_MEC.UART_Status) & ERC32_MEC_UART_STATUS_DRB) == 0 )
if (UStat & ERC32_MEC_UART_STATUS_ERRB) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRB;
ERC32_MEC.Control = ERC32_MEC.Control;
}
return (int) ERC32_MEC.UART_Channel_B;
}
/* console_outbyte_polled
*
* This routine transmits a character out.
*
* Input parameters:
* port - port to transmit character to
* ch - character to be transmitted
*
* Output parameters: NONE
*
* Return values: NONE
* This routine transmits a character using polling.
*/
void console_outbyte_polled(
@@ -163,6 +61,52 @@ void console_outbyte_polled(
ERC32_MEC.UART_Channel_B = (int) ch;
}
/*
* console_inbyte_nonblocking
*
* This routine polls for a character.
*/
int console_inbyte_nonblocking(
int port,
char *c
)
{
int UStat;
UStat = ERC32_MEC.UART_Status;
switch (port) {
case 0:
if (UStat & ERC32_MEC_UART_STATUS_ERRA) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRA;
ERC32_MEC.Control = ERC32_MEC.Control;
}
if ((UStat & ERC32_MEC_UART_STATUS_DRA) == 0)
return 0;
*c = (char) ERC32_MEC.UART_Channel_A;
return 1;
case 1:
if (UStat & ERC32_MEC_UART_STATUS_ERRB) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRB;
ERC32_MEC.Control = ERC32_MEC.Control;
}
if ((UStat & ERC32_MEC_UART_STATUS_DRB) == 0)
return 0;
*c = (char) ERC32_MEC.UART_Channel_B;
return 1;
default:
assert( 0 );
}
return 0;
}
/*
* Interrupt driven console IO
*/
@@ -176,9 +120,10 @@ void console_outbyte_polled(
#include <ringbuf.h>
Ring_buffer_t TX_Buffer[ 2 ];
Ring_buffer_t RX_Buffer[ 2 ];
boolean Is_TX_active[ 2 ];
void *console_termios_data[ 2 ];
/*
* console_isr_a
*
@@ -205,9 +150,8 @@ rtems_isr console_isr_a(
ERC32_MEC.Control = ERC32_MEC.Control;
}
ch = ERC32_MEC.UART_Channel_A;
if ( !Ring_buffer_Is_full( &RX_Buffer[ 0 ] ) )
Ring_buffer_Add_character( &RX_Buffer[ 0 ], ch );
/* else toss it */
rtems_termios_enqueue_raw_characters( console_termios_data[ 0 ], &ch, 1 );
}
if ( ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEA ) {
@@ -247,9 +191,8 @@ rtems_isr console_isr_b(
ERC32_MEC.Control = ERC32_MEC.Control;
}
ch = ERC32_MEC.UART_Channel_B;
if ( !Ring_buffer_Is_full( &RX_Buffer[ 1 ] ) )
Ring_buffer_Add_character( &RX_Buffer[ 1 ], ch );
/* else toss it */
rtems_termios_enqueue_raw_characters( console_termios_data[ 1 ], &ch, 1 );
}
if ( ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEB ) {
@@ -329,11 +272,8 @@ void console_exit()
extern unsigned32 trap_table[];
#endif
void console_initialize_interrupts()
void console_initialize_interrupts( void )
{
Ring_buffer_Initialize( &RX_Buffer[ 0 ] );
Ring_buffer_Initialize( &RX_Buffer[ 1 ] );
Ring_buffer_Initialize( &TX_Buffer[ 0 ] );
Ring_buffer_Initialize( &TX_Buffer[ 1 ] );
@@ -349,29 +289,6 @@ void console_initialize_interrupts()
set_vector( console_isr_b, CONSOLE_UART_B_TRAP, 1 );
}
/*
* console_inbyte_interrupts
*
* This routine reads a character from the UART.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values:
* character read from UART
*/
char console_inbyte_interrupts( int port )
{
char ch;
while ( Ring_buffer_Is_empty( &RX_Buffer[ port ] ) );
Ring_buffer_Remove_character( &RX_Buffer[ port ], ch );
return ch;
}
/*
* console_outbyte_interrupts
*
@@ -441,168 +358,130 @@ void DEBUG_puts(
/*
* console_open
* Console Termios Support Entry Points
*
* This routine is the console device driver open entry point.
*/
int console_write_support (int minor, char *buf, int len)
{
int nwrite = 0;
while (nwrite < len) {
#if defined(CONSOLE_USE_INTERRUPTS)
console_outbyte_polled( minor, *buf++ );
#else
console_outbyte_interrupt( minor, *buf++ );
#endif
nwrite++;
}
return nwrite;
}
/*
* Console Device Driver Entry Points
*
* Input parameters:
* major - console device major number
* minor - console device minor number
* arg - pointer to optional device driver arguments
*
* Output parameters: NONE
*
* Return values:
* rtems_device_driver status code
*/
rtems_device_driver console_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code status;
rtems_termios_initialize();
/*
* Register Device Names
*/
status = rtems_io_register_name( "/dev/console", major, 0 );
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
status = rtems_io_register_name( "/dev/console_b", major, 1 );
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
/*
* Initialize Hardware
*/
#ifdef CONSOLE_USE_INTERRUPTS
console_initialize_interrupts();
#endif
return RTEMS_SUCCESSFUL;
}
rtems_device_driver console_open(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
rtems_status_code sc;
#if defined(CONSOLE_USE_INTERRUPTS)
rtems_libio_open_close_args_t *args = arg;
#endif
assert( minor <= 1 );
if ( minor > 2 )
return RTEMS_INVALID_NUMBER;
#if defined(CONSOLE_USE_INTERRUPTS)
sc = rtems_termios_open (major, minor, arg,
NULL,
NULL,
NULL,
console_write_support);
console_termios_data[ minor ] = args->iop->data1;
#else
sc = rtems_termios_open (major, minor, arg,
NULL,
NULL,
console_inbyte_nonblocking,
console_write_support);
#endif
return RTEMS_SUCCESSFUL;
}
/*
* console_close
*
* This routine is the console device driver close entry point.
*
* Input parameters:
* major - console device major number
* minor - console device minor number
* arg - pointer to optional device driver arguments
*
* Output parameters: NONE
*
* Return values:
* rtems_device_driver status code
*/
rtems_device_driver console_close(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
return RTEMS_SUCCESSFUL;
return rtems_termios_close (arg);
}
/*
* console_read
*
* This routine is the console device driver read entry point.
*
* Input parameters:
* major - console device major number
* minor - console device minor number
* arg - pointer to optional device driver arguments
*
* Output parameters: NONE
*
* Return values:
* rtems_device_driver status code
*
* NOTE: 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( minor );
if (buffer[ count ] == '\n' || buffer[ count ] == '\r') {
buffer[ count++ ] = '\n';
break;
}
}
rw_args->bytes_moved = count;
return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED;
return rtems_termios_read (arg);
}
/*
* console_write
*
* This routine is the console device driver write entry point.
*
* Input parameters:
* major - console device major number
* minor - console device minor number
* arg - pointer to optional device driver arguments
*
* Output parameters: NONE
*
* Return values:
* rtems_device_driver status code
*
* NOTE: 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++) {
OUTBYTE( minor, buffer[ count ] );
if ( buffer[ count ] == '\n') {
OUTBYTE( minor, '\r');
}
}
rw_args->bytes_moved = maximum;
return RTEMS_SUCCESSFUL;
return rtems_termios_write (arg);
}
/*
* console_control
*
* This routine is the console device driver control entry point.
*
* Input parameters:
* major - console device major number
* minor - console device minor number
* arg - pointer to optional device driver arguments
*
* Output parameters: NONE
*
* Return values:
* rtems_device_driver status code
*/
rtems_device_driver console_control(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
return RTEMS_SUCCESSFUL;
return rtems_termios_ioctl (arg);
}