mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-10-30 16:01:24 +01:00
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/*
|
|
* (C) Copyright 2002-2004
|
|
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.de>
|
|
*
|
|
* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/hardware.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
void serial_setbrg (void)
|
|
{
|
|
unsigned short divisor = 0;
|
|
|
|
switch (gd->baudrate) {
|
|
case 1200: divisor = 3072; break;
|
|
case 9600: divisor = 384; break;
|
|
case 19200: divisor = 192; break;
|
|
case 38400: divisor = 96; break;
|
|
case 57600: divisor = 64; break;
|
|
case 115200: divisor = 32; break;
|
|
default: hang (); break;
|
|
}
|
|
|
|
/* init serial UART0 */
|
|
PUT8(U0LCR, 0);
|
|
PUT8(U0IER, 0);
|
|
PUT8(U0LCR, 0x80); /* DLAB=1 */
|
|
PUT8(U0DLL, (unsigned char)(divisor & 0x00FF));
|
|
PUT8(U0DLM, (unsigned char)(divisor >> 8));
|
|
PUT8(U0LCR, 0x03); /* 8N1, DLAB=0 */
|
|
PUT8(U0FCR, 1); /* Enable RX and TX FIFOs */
|
|
}
|
|
|
|
int serial_init (void)
|
|
{
|
|
unsigned long pinsel0;
|
|
|
|
serial_setbrg ();
|
|
|
|
pinsel0 = GET32(PINSEL0);
|
|
pinsel0 &= ~(0x00000003);
|
|
pinsel0 |= 5;
|
|
PUT32(PINSEL0, pinsel0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void serial_putc (const char c)
|
|
{
|
|
if (c == '\n')
|
|
{
|
|
while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
|
|
PUT8(U0THR, '\r');
|
|
}
|
|
|
|
while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
|
|
PUT8(U0THR, c);
|
|
}
|
|
|
|
int serial_getc (void)
|
|
{
|
|
while((GET8(U0LSR) & 1) == 0);
|
|
return GET8(U0RBR);
|
|
}
|
|
|
|
void
|
|
serial_puts (const char *s)
|
|
{
|
|
while (*s) {
|
|
serial_putc (*s++);
|
|
}
|
|
}
|
|
|
|
/* Test if there is a byte to read */
|
|
int serial_tstc (void)
|
|
{
|
|
return (GET8(U0LSR) & 1);
|
|
}
|