diff --git a/urjtag/src/tap/usbconn/libftdx.h b/urjtag/src/tap/usbconn/libftdx.h
new file mode 100644
index 00000000..634b0d83
--- /dev/null
+++ b/urjtag/src/tap/usbconn/libftdx.h
@@ -0,0 +1,37 @@
+/*
+ * $Id: libftdx.h 1594 2009-05-13 23:36:04Z rfhh $
+ *
+ * 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.
+ *
+ * Written by A. Laeuger, 2008
+ *
+ */
+
+#ifndef URJ_USBCONN_LIBFTDX_H
+#define URJ_USBCONN_LIBFTDX_H 1
+
+#define URJ_USBCONN_FTDX_MAXSEND 4096
+#define URJ_USBCONN_FTDX_MAXSEND_MPSSE (64 * 1024)
+
+/* Maximum chunk to receive from ftdi/ftd2xx driver.
+   Larger values might speed up comm, but there's an upper limit
+   when too many bytes are sent and the underlying libftdi or libftd2xx
+   don't fetch the returned data in time -> deadlock */
+#define URJ_USBCONN_FTDI_MAXRECV   ( 4 * 64)
+#define URJ_USBCONN_FTD2XX_MAXRECV (63 * 64)
+#define URJ_USBCONN_FTDX_MAXRECV   (URJ_USBCONN_FTD2XX_MAXRECV < URJ_USBCONN_FTDI_MAXRECV ? URJ_USBCONN_FTD2XX_MAXRECV : URJ_USBCONN_FTDI_MAXRECV)
+
+#endif
diff --git a/urjtag/src/tap/usbconn/libusb.h b/urjtag/src/tap/usbconn/libusb.h
new file mode 100644
index 00000000..6dfc92e1
--- /dev/null
+++ b/urjtag/src/tap/usbconn/libusb.h
@@ -0,0 +1,39 @@
+/*
+ * $Id: libusb.h 1606 2009-05-19 15:06:20Z rfhh $
+ *
+ * Link driver for accessing USB devices via libusb
+ *
+ * Copyright (C) 2008 K. Waschk
+ *
+ * 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.
+ *
+ * Written by Kolja Waschk, 2008
+ *
+ */
+
+#ifndef URJ_USBCONN_LIBUSB_H
+#define URJ_USBCONN_LIBUSB_H 1
+
+#include <usb.h>
+
+typedef struct
+{
+    struct usb_device *dev;
+    struct usb_dev_handle *handle;
+    void *data;
+} urj_usbconn_libusb_param_t;
+
+#endif