avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/include/dwc3-uboot.h

@@ -0,0 +1,42 @@
+/* include/dwc3-uboot.h
+ *
+ * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Designware SuperSpeed USB uboot init
+ *
+ * SPDX-License-Identifier:     GPL-2.0
+ */
+
+#ifndef __DWC3_UBOOT_H_
+#define __DWC3_UBOOT_H_
+
+#include <linux/usb/otg.h>
+
+struct dwc3_device {
+	unsigned long base;
+	enum usb_dr_mode dr_mode;
+	u32 maximum_speed;
+	unsigned tx_fifo_resize:1;
+	unsigned has_lpm_erratum;
+	u8 lpm_nyet_threshold;
+	unsigned is_utmi_l1_suspend;
+	u8 hird_threshold;
+	unsigned disable_scramble_quirk;
+	unsigned u2exit_lfps_quirk;
+	unsigned u2ss_inp3_quirk;
+	unsigned req_p1p2p3_quirk;
+	unsigned del_p1p2p3_quirk;
+	unsigned del_phy_power_chg_quirk;
+	unsigned lfps_filter_quirk;
+	unsigned rx_detect_poll_quirk;
+	unsigned dis_u3_susphy_quirk;
+	unsigned dis_u2_susphy_quirk;
+	unsigned tx_de_emphasis_quirk;
+	unsigned tx_de_emphasis;
+	int index;
+};
+
+int dwc3_uboot_init(struct dwc3_device *dev);
+void dwc3_uboot_exit(int index);
+void dwc3_uboot_handle_interrupt(int index);
+#endif /* __DWC3_UBOOT_H_ */