/* * (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; void 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 */ } int serial_init (void) { unsigned long pinsel0; serial_setbrg (); pinsel0 = GET32(PINSEL0); pinsel0 &= ~(0x00000003); pinsel0 |= 5; PUT32(PINSEL0, pinsel0); return (0); } void 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); } int serial_getc (void) { while((GET8(U0LSR) & 1) == 0); return GET8(U0RBR); } void serial_puts (const char *s) { while (*s) { serial_putc (*s++); } } /* Test if there is a byte to read */ int serial_tstc (void) { return (GET8(U0LSR) & 1); }