/*
* This file contains the TTY driver for the serial ports on the LEON.
*
* This driver uses the termios pseudo driver.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
*
* Modified for LEON3 BSP.
* COPYRIGHT (c) 2004.
* Gaisler Research.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <stdlib.h>
#include <assert.h>
#include <rtems/bspIo.h>
#include <amba.h>
/*
* Should we use a polled or interrupt drived console?
*
* NOTE: This is defined in the custom/leon.cfg file.
*/
/*
* console_outbyte_polled
*
* This routine transmits a character using polling.
*/
void console_outbyte_polled(
int port,
char ch
);
/* body is in debugputs.c */
/*
* console_inbyte_nonblocking
*
* This routine polls for a character.
*/
int console_inbyte_nonblocking( int port );
/* body is in debugputs.c */
/*
* Console Termios Support Entry Points
*
*/
int console_write_support (int minor, const char *buf, int len)
{
int nwrite = 0;
while (nwrite < len) {
console_outbyte_polled( minor, *buf++ );
nwrite++;
}
return nwrite;
}
/*
* Console Device Driver Entry Points
*
*/
int uarts = 0;
static int isinit = 0;
volatile LEON3_UART_Regs_Map *LEON3_Console_Uart[LEON3_APBUARTS];
int scan_uarts(void) {
int i;
amba_apb_device apbuarts[LEON3_APBUARTS];
if (isinit == 0) {
i = 0;
uarts = 0;
uarts = amba_find_apbslvs(
&amba_conf, VENDOR_GAISLER, GAISLER_APBUART, apbuarts, LEON3_APBUARTS);
for(i=0; i<uarts; i++) {
LEON3_Console_Uart[i] = (volatile LEON3_UART_Regs_Map *)apbuarts[i].start;
}
isinit = 1;
}
return uarts;
}
rtems_device_driver console_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code status;
int i, uart0;
char console_name[16];
rtems_termios_initialize();
/* Find UARTs */
scan_uarts();
/* default to zero and override if multiprocessing */
uart0 = 0;
#if defined(RTEMS_MULTIPROCESSING)
if (rtems_configuration_get_user_multiprocessing_table() != NULL)
uart0 = LEON3_Cpu_Index;
#endif
/* Register Device Names */
if (uarts && (uart0 < uarts))
{
status = rtems_io_register_name( "/dev/console", major, 0 );
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
strcpy(console_name,"/dev/console_a");
for (i = uart0+1; i < uarts; i++)
{
console_name[13]++;
status = rtems_io_register_name( console_name, major, i);
}
}
/*
* Initialize Hardware if ONLY CPU or first CPU in MP system
*/
#if defined(RTEMS_MULTIPROCESSING)
if (rtems_configuration_get_user_multiprocessing_table()->node == 1)
#endif
{
for (i = uart0; i < uarts; i++)
{
LEON3_Console_Uart[i]->ctrl |=
LEON_REG_UART_CTRL_RE | LEON_REG_UART_CTRL_TE;
LEON3_Console_Uart[i]->status = 0;
}
}
return RTEMS_SUCCESSFUL;
}
rtems_device_driver console_open(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
rtems_status_code sc;
static const rtems_termios_callbacks pollCallbacks = {
NULL, /* firstOpen */
NULL, /* lastClose */
console_inbyte_nonblocking, /* pollRead */
console_write_support, /* write */
NULL, /* setAttributes */
NULL, /* stopRemoteTx */
NULL, /* startRemoteTx */
0 /* outputUsesInterrupts */
};
assert( minor <= LEON3_APBUARTS );
if ( minor > LEON3_APBUARTS )
return RTEMS_INVALID_NUMBER;
sc = rtems_termios_open (major, minor, arg, &pollCallbacks);
return RTEMS_SUCCESSFUL;
}
rtems_device_driver console_close(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
return rtems_termios_close (arg);
}
rtems_device_driver console_read(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
return rtems_termios_read (arg);
}
rtems_device_driver console_write(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
return rtems_termios_write (arg);
}
rtems_device_driver console_control(
rtems_device_major_number major,
rtems_device_minor_number minor,
void * arg
)
{
return rtems_termios_ioctl (arg);
}