/* * (C) Copyright 2002 * 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/ixp425.h> /* * 14.7456 MHz * Baud Rate = -------------- * 16 x Divisor */ #define SERIAL_CLOCK 921600 DECLARE_GLOBAL_DATA_PTR; void serial_setbrg (void) { unsigned int quot = 0; int uart = CFG_IXP425_CONSOLE; if ((gd->baudrate <= SERIAL_CLOCK) && (SERIAL_CLOCK % gd->baudrate == 0)) quot = SERIAL_CLOCK / gd->baudrate; else hang (); IER(uart) = 0; /* Disable for now */ FCR(uart) = 0; /* No fifos enabled */ /* set baud rate */ LCR(uart) = LCR_WLS0 | LCR_WLS1 | LCR_DLAB; DLL(uart) = quot & 0xff; DLH(uart) = quot >> 8; LCR(uart) = LCR_WLS0 | LCR_WLS1; #ifdef CONFIG_SERIAL_RTS_ACTIVE MCR(uart) = MCR_RTS; /* set RTS active */ #else MCR(uart) = 0; /* set RTS inactive */ #endif IER(uart) = IER_UUE; } /* * 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); } /* * Output a single byte to the serial port. */ void serial_putc (const char c) { /* wait for room in the tx FIFO on UART */ while ((LSR(CFG_IXP425_CONSOLE) & LSR_TEMT) == 0); THR(CFG_IXP425_CONSOLE) = c; /* 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) { return LSR(CFG_IXP425_CONSOLE) & LSR_DR; } /* * 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 (!(LSR(CFG_IXP425_CONSOLE) & LSR_DR)); return (char) RBR(CFG_IXP425_CONSOLE) & 0xff; } void serial_puts (const char *s) { while (*s) { serial_putc (*s++); } }