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/*
* This file contains the TTY driver for the serial ports on the LEON.
*
* This driver uses the termios pseudo driver.
*
* COPYRIGHT (c) 1989-1999.
* 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>
/*
* Number of uarts on AMBA bus
*/
extern int uarts;
static int isinit = 0;
/*
* Scan for UARTS in configuration
*/
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;
}
/* initialize uart 0 if present for printk */
if ( uarts ) {
LEON3_Console_Uart[0]->ctrl |=
LEON_REG_UART_CTRL_RE | LEON_REG_UART_CTRL_TE;
LEON3_Console_Uart[0]->status = 0;
}
isinit = 1;
}
return uarts;
}
/*
* console_outbyte_polled
*
* This routine transmits a character using polling.
*/
void console_outbyte_polled(
int port,
unsigned char ch
)
{
if ((port >= 0) && (port < uarts)) {
int u = LEON3_Cpu_Index+port;
while ( (LEON3_Console_Uart[u]->status & LEON_REG_UART_STATUS_THE) == 0 );
LEON3_Console_Uart[u]->data = (unsigned int) ch;
}
}
/*
* console_inbyte_nonblocking
*
* This routine polls for a character.
*/
int console_inbyte_nonblocking( int port )
{
if ((port >= 0) && (port < uarts)) {
int u = LEON3_Cpu_Index+port;
if (LEON3_Console_Uart[u]->status & LEON_REG_UART_STATUS_ERR)
LEON3_Console_Uart[u]->status = ~LEON_REG_UART_STATUS_ERR;
if ((LEON3_Console_Uart[u]->status & LEON_REG_UART_STATUS_DR) == 0)
return -1;
return (int) LEON3_Console_Uart[u]->data;
} else {
assert( 0 );
}
return -1;
}
/* putchar/getchar for printk */
static void bsp_out_char(char c)
{
console_outbyte_polled(0, c);
}
/*
* To support printk
*/
#include <rtems/bspIo.h>
BSP_output_char_function_type BSP_output_char = bsp_out_char;
static int bsp_in_char(void)
{
int tmp;
while ((tmp = console_inbyte_nonblocking(0)) < 0);
return tmp;
}
BSP_polling_getchar_function_type BSP_poll_char = bsp_in_char;
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