From 9a2dd74032956aa85f50d10a878786494f9a1ffc Mon Sep 17 00:00:00 2001
From: stroese <stroese>
Date: Fri, 12 Sep 2003 08:42:58 +0000
Subject: Xilinx jtag tool added.

---
 board/esd/common/xilinx_jtag/ports.c | 116 +++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 board/esd/common/xilinx_jtag/ports.c

(limited to 'board/esd/common/xilinx_jtag/ports.c')

diff --git a/board/esd/common/xilinx_jtag/ports.c b/board/esd/common/xilinx_jtag/ports.c
new file mode 100644
index 000000000..3ad94a5b6
--- /dev/null
+++ b/board/esd/common/xilinx_jtag/ports.c
@@ -0,0 +1,116 @@
+/*
+ * (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 */
+}
-- 
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