/* * (C) Copyright 2003 * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com * * See file CREDITS for list of people who contributed to this * project. * * 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 *//*******************************************************//* file: ports.c                                       *//* abstract:  This file contains the routines to       *//*            output values on the JTAG ports, to read *//*            the TDO bit, and to read a byte of data  *//*            from the prom                            *//*                                                     *//*******************************************************/#include <common.h>#include <asm/processor.h>#include "ports.h"static unsigned long output = 0;static int filepos = 0;static int oldstate = 0;static int newstate = 0;static int readptr = 0;extern long filesize;extern const unsigned char fpgadata[];/* if in debugging mode, then just set the variables */void setPort(short p,short val){	if (p==TMS) {		if (val) {			output |= JTAG_TMS;		} else {			output &= ~JTAG_TMS;		}	}	if (p==TDI) {		if (val) {			output |= JTAG_TDI;		} else {			output &= ~JTAG_TDI;		}	}	if (p==TCK) {		if (val) {			output |= JTAG_TCK;		} else {			output &= ~JTAG_TCK;		}		out32(GPIO0_OR, output);	}}/* toggle tck LH */void pulseClock(void){	setPort(TCK,0);  /* set the TCK port to low  */	setPort(TCK,1);  /* set the TCK port to high */}/* read in a byte of data from the prom */void readByte(unsigned char *data){	/* pretend reading using a file */	*data = fpgadata[readptr++];	newstate = (100 * filepos++) / filesize;	if (newstate != oldstate) {		printf("%4d\r\r\r\r", newstate);		oldstate = newstate;	}}/* read the TDO bit from port */unsigned char readTDOBit(void){	unsigned long inputs;	inputs = in32(GPIO0_IR);	if (inputs & JTAG_TDO)		return 1;	else		return 0;}/* Wait at least the specified number of microsec.                           *//* Use a timer if possible; otherwise estimate the number of instructions    *//* necessary to be run based on the microcontroller speed.  For this example *//* we pulse the TCK port a number of times based on the processor speed.     */void waitTime(long microsec){	udelay(microsec); /* esd */}