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/*
* (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;
static void lpc2292_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 */
}
static int lpc2292_serial_init(void)
{
unsigned long pinsel0;
serial_setbrg ();
pinsel0 = GET32(PINSEL0);
pinsel0 &= ~(0x00000003);
pinsel0 |= 5;
PUT32(PINSEL0, pinsel0);
return (0);
}
static void lpc2292_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);
}
static int lpc2292_serial_getc(void)
{
while((GET8(U0LSR) & 1) == 0);
return GET8(U0RBR);
}
/* Test if there is a byte to read */
static int lpc2292_serial_tstc(void)
{
return (GET8(U0LSR) & 1);
}
static struct serial_device lpc2292_serial_drv = {
.name = "lpc2292_serial",
.start = lpc2292_serial_init,
.stop = NULL,
.setbrg = lpc2292_serial_setbrg,
.putc = lpc2292_serial_putc,
.puts = default_serial_puts,
.getc = lpc2292_serial_getc,
.tstc = lpc2292_serial_tstc,
};
void lpc2292_serial_initialize(void)
{
serial_register(&lpc2292_serial_drv);
}
__weak struct serial_device *default_serial_console(void)
{
return &lpc2292_serial_drv;
}
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