/* * (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 "SA-1100.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();#ifdef CONFIG_SERIAL1    // Wait until port is ready ...    while(Ser1UTSR1 & UTSR1_TBY) {}    // init serial serial 1    Ser1UTCR3 = 0x00;    Ser1UTSR0 = 0xff;    Ser1UTCR0 = ( UTCR0_1StpBit | UTCR0_8BitData );    Ser1UTCR1 = 0;    Ser1UTCR2 = (u32)reg;    Ser1UTCR3 = ( UTCR3_RXE | UTCR3_TXE );#elif CONFIG_SERIAL3    // Wait until port is ready ...    while(Ser3UTSR1 & UTSR1_TBY) {}    // init serial serial 3    Ser3UTCR3 = 0x00;    Ser3UTSR0 = 0xff;    Ser3UTCR0 = ( UTCR0_1StpBit | UTCR0_8BitData );    Ser3UTCR1 = 0;    Ser3UTCR2 = (u32)reg;    Ser3UTCR3 = ( UTCR3_RXE | UTCR3_TXE );#else#error "Bad: you didn't configured serial ..."#endif}/* * 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){#ifdef CONFIG_SERIAL1    /* wait for room in the tx FIFO on SERIAL1 */    while((Ser1UTSR0 & UTSR0_TFS) == 0) ;    Ser1UTDR = c;#elif CONFIG_SERIAL3    /* wait for room in the tx FIFO on SERIAL3 */    while((Ser3UTSR0 & UTSR0_TFS) == 0) ;    Ser3UTDR = c;#endif    /* If \n, also do \r */    if(c == '\n')      serial_putc('\r');}/* * 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){#ifdef CONFIG_SERIAL1    return Ser1UTSR1 & UTSR1_RNE;#elif CONFIG_SERIAL3    return Ser3UTSR1 & UTSR1_RNE;#endif}/* * 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){#ifdef CONFIG_SERIAL1    while (!(Ser1UTSR1 & UTSR1_RNE))    	;    return (char)Ser1UTDR & 0xff;#elif CONFIG_SERIAL3    while (!(Ser3UTSR1 & UTSR1_RNE))    	;    return (char)Ser3UTDR & 0xff;#endif}