1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/staging/altera-stapl/altera-lpt.c b/drivers/staging/altera-stapl/altera-lpt.c
new file mode 100644
index 000000000000..91456a03612d
--- /dev/null
+++ b/drivers/staging/altera-stapl/altera-lpt.c
@@ -0,0 +1,70 @@
+/*
+ * altera-lpt.c
+ *
+ * altera FPGA driver
+ *
+ * Copyright (C) Altera Corporation 1998-2001
+ * Copyright (C) 2010 NetUP Inc.
+ * Copyright (C) 2010 Abylay Ospan <aospan@netup.ru>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include "altera-exprt.h"
+
+static int lpt_hardware_initialized;
+
+static void byteblaster_write(int port, int data)
+{
+	outb((u8)data, (u16)(port + 0x378));
+};
+
+static int byteblaster_read(int port)
+{
+	int data = 0;
+	data = inb((u16)(port + 0x378));
+	return data & 0xff;
+};
+
+int netup_jtag_io_lpt(void *device, int tms, int tdi, int read_tdo)
+{
+	int data = 0;
+	int tdo = 0;
+	int initial_lpt_ctrl = 0;
+
+	if (!lpt_hardware_initialized) {
+		initial_lpt_ctrl = byteblaster_read(2);
+		byteblaster_write(2, (initial_lpt_ctrl | 0x02) & 0xdf);
+		lpt_hardware_initialized = 1;
+	}
+
+	data = ((tdi ? 0x40 : 0) | (tms ? 0x02 : 0));
+
+	byteblaster_write(0, data);
+
+	if (read_tdo) {
+		tdo = byteblaster_read(1);
+		tdo = ((tdo & 0x80) ? 0 : 1);
+	}
+
+	byteblaster_write(0, data | 0x01);
+
+	byteblaster_write(0, data);
+
+	return tdo;
+}