/* * (C) Copyright 2002 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> * * 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>#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB)#if defined(CONFIG_S3C2400) || defined(CONFIG_TRAB)#include <s3c2400.h>#elif defined(CONFIG_S3C2410)#include <s3c2410.h>#endif#ifdef CONFIG_SERIAL1#define UART_NR	S3C24X0_UART0#elif defined(CONFIG_SERIAL2)# if defined(CONFIG_TRAB)#  error "TRAB supports only CONFIG_SERIAL1"# endif#define UART_NR	S3C24X0_UART1#elif defined(CONFIG_SERIAL3)# if defined(CONFIG_TRAB)#  #error "TRAB supports only CONFIG_SERIAL1"# endif#define UART_NR	S3C24X0_UART2#else#error "Bad: you didn't configure serial ..."#endifvoid serial_setbrg (void){	DECLARE_GLOBAL_DATA_PTR;	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);	int i;	unsigned int reg = 0;	/* value is calculated so : (int)(PCLK/16./baudrate) -1 */	reg = get_PCLK() / (16 * gd->baudrate) - 1;	/* FIFO enable, Tx/Rx FIFO clear */	uart->UFCON = 0x07;	uart->UMCON = 0x0;	/* Normal,No parity,1 stop,8 bit */	uart->ULCON = 0x3;	/*	 * tx=level,rx=edge,disable timeout int.,enable rx error int.,	 * normal,interrupt or polling	 */	uart->UCON = 0x245;	uart->UBRDIV = reg;#ifdef CONFIG_HWFLOW	uart->UMCON = 0x1; /* RTS up */#endif	for (i = 0; i < 100; i++);}/* * Initialise the serial port with the given baudrate. The settings * are always 8 data bits, no parity, 1 stop bit, no start bits. * */int serial_init (void){	serial_setbrg ();	return (0);}/* * 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){	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);	/* wait for character to arrive */	while (!(uart->UTRSTAT & 0x1));	return uart->URXH & 0xff;}#ifdef CONFIG_HWFLOWstatic int hwflow = 0; /* turned off by default */int hwflow_onoff(int on){	switch(on) {	case 0:	default:		break; /* return current */	case 1:		hwflow = 1; /* turn on */		break;	case -1:		hwflow = 0; /* turn off */		break;	}	return hwflow;}#endif#ifdef CONFIG_MODEM_SUPPORTstatic int be_quiet = 0;void disable_putc(void){	be_quiet = 1;}void enable_putc(void){	be_quiet = 0;}#endif/* * Output a single byte to the serial port. */void serial_putc (const char c){	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);#ifdef CONFIG_MODEM_SUPPORT	if (be_quiet)		return;#endif	/* wait for room in the tx FIFO */	while (!(uart->UTRSTAT & 0x2));#ifdef CONFIG_HWFLOW	/* Wait for CTS up */	while(hwflow && !(uart->UMSTAT & 0x1))		;#endif	uart->UTXH = c;	/* If \n, also do \r */	if (c == '\n')		serial_putc ('\r');}/* * Test whether a character is in the RX buffer */int serial_tstc (void){	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);	return uart->UTRSTAT & 0x1;}voidserial_puts (const char *s){	while (*s) {		serial_putc (*s++);	}}#endif /* defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) */