/* * (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 "armboot.h"#include "clps7111.h"void serial_setbrg(bd_t *bd, int baudrate){    unsigned int reg = 0;       if (baudrate == 1200)        reg = 191;    else if (baudrate == 9600)   reg = 23;    else if (baudrate == 19200)  reg = 11;    else if (baudrate == 38400)  reg = 5;    else if (baudrate == 57600)  reg = 3;    else if (baudrate == 115200) reg = 1;    else hang();    // init serial serial 1,2    IO_SYSCON1 = SYSCON1_UART1EN;    IO_SYSCON2 = SYSCON2_UART2EN;        reg |= UBRLCR_WRDLEN8;    IO_UBRLCR1 = reg;    IO_UBRLCR2 = reg;}  /* * Initialise the serial port with the given baudrate. The settings * are always 8 data bits, no parity, 1 stop bit, no start bits. * */void serial_init(bd_t *bd){    const char *baudrate;    if ((baudrate = getenv(bd, "baudrate")) != 0)      bd->bi_baudrate = simple_strtoul(baudrate, NULL, 10);          serial_setbrg(bd, bd->bi_baudrate);}/* * Output a single byte to the serial port. */void serial_putc(const char c){    int tmo;    /* If \n, also do \r */    if(c == '\n')      serial_putc('\r');    tmo = get_timer(0) + 1*CFG_HZ;    while(IO_SYSFLG1 & SYSFLG1_UTXFF)      if (get_timer(0) > tmo)	break;    IO_UARTDR1 = c;}/* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. When the function is succesfull, the character read is * written into its argument c. */int serial_tstc(void){    return !(IO_SYSFLG1 & SYSFLG1_URXFE);}/* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. When the function is succesfull, the character read is * written into its argument c. */int serial_getc(void){    while (IO_SYSFLG1 & SYSFLG1_URXFE)      ;    return IO_UARTDR1 & 0xff;}