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/drivers/usb/host/xhci-omap.c

@@ -0,0 +1,100 @@
+/*
+ * OMAP USB HOST xHCI Controller
+ *
+ * (C) Copyright 2013
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <usb.h>
+#include <asm-generic/errno.h>
+#include <asm/omap_common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/sys_proto.h>
+
+#include <linux/compat.h>
+#include <linux/usb/dwc3.h>
+#include <linux/usb/xhci-omap.h>
+
+#include "xhci.h"
+
+/* Declare global data pointer */
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct omap_xhci omap;
+
+__weak int __board_usb_init(int index, enum usb_init_type init)
+{
+	return 0;
+}
+int board_usb_init(int index, enum usb_init_type init)
+	__attribute__((weak, alias("__board_usb_init")));
+
+static int omap_xhci_core_init(struct omap_xhci *omap)
+{
+	int ret = 0;
+
+	usb_phy_power(1);
+	omap_enable_phy(omap);
+
+	ret = dwc3_core_init(omap->dwc3_reg);
+	if (ret) {
+		debug("%s:failed to initialize core\n", __func__);
+		return ret;
+	}
+
+	/* We are hard-coding DWC3 core to Host Mode */
+	dwc3_set_mode(omap->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
+
+	return ret;
+}
+
+static void omap_xhci_core_exit(struct omap_xhci *omap)
+{
+	usb_phy_power(0);
+}
+
+int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
+{
+	struct omap_xhci *ctx = &omap;
+	int ret = 0;
+
+	ctx->hcd = (struct xhci_hccr *)OMAP_XHCI_BASE;
+	ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
+	ctx->usb3_phy = (struct omap_usb3_phy *)OMAP_OCP1_SCP_BASE;
+	ctx->otg_wrapper = (struct omap_dwc_wrapper *)OMAP_OTG_WRAPPER_BASE;
+
+	ret = board_usb_init(index, USB_INIT_HOST);
+	if (ret != 0) {
+		puts("Failed to initialize board for USB\n");
+		return ret;
+	}
+
+	ret = omap_xhci_core_init(ctx);
+	if (ret < 0) {
+		puts("Failed to initialize xhci\n");
+		return ret;
+	}
+
+	*hccr = (struct xhci_hccr *)(OMAP_XHCI_BASE);
+	*hcor = (struct xhci_hcor *)((uint32_t) *hccr
+				+ HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
+
+	debug("omap-xhci: init hccr %x and hcor %x hc_length %d\n",
+	      (uint32_t)*hccr, (uint32_t)*hcor,
+	      (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
+
+	return ret;
+}
+
+void xhci_hcd_stop(int index)
+{
+	struct omap_xhci *ctx = &omap;
+
+	omap_xhci_core_exit(ctx);
+	board_usb_cleanup(index, USB_INIT_HOST);
+}