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/board/micronas/vct/ehci.c

@@ -0,0 +1,97 @@
+/*
+ * (C) Copyright 2009 Stefan Roese <sr@denx.de>, DENX Software Engineering
+ *
+ * Original Author Guenter Gebhardt
+ * Copyright (C) 2006 Micronas GmbH
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+#include "vct.h"
+
+int vct_ehci_hcd_init(u32 *hccr, u32 *hcor)
+{
+	int retval;
+	u32 val;
+	u32 addr;
+
+	dcgu_set_reset_switch(DCGU_HW_MODULE_USB_24, DCGU_SWITCH_ON);
+	dcgu_set_reset_switch(DCGU_HW_MODULE_USB_60, DCGU_SWITCH_ON);
+	dcgu_set_clk_switch(DCGU_HW_MODULE_USB_24, DCGU_SWITCH_ON);
+	dcgu_set_clk_switch(DCGU_HW_MODULE_USB_PLL, DCGU_SWITCH_ON);
+	dcgu_set_reset_switch(DCGU_HW_MODULE_USB_24, DCGU_SWITCH_OFF);
+
+	/* Wait until (DCGU_USBPHY_STAT == 7) */
+	addr = DCGU_USBPHY_STAT(DCGU_BASE);
+	val = reg_read(addr);
+	while (val != 7)
+		val = reg_read(addr);
+
+	dcgu_set_clk_switch(DCGU_HW_MODULE_USB_60, DCGU_SWITCH_ON);
+	dcgu_set_reset_switch(DCGU_HW_MODULE_USB_60, DCGU_SWITCH_OFF);
+
+	retval = scc_reset(SCC_USB_RW, 0);
+	if (retval) {
+		printf("scc_reset(SCC_USB_RW, 0) returned: 0x%x\n", retval);
+		return retval;
+	} else {
+		retval = scc_reset(SCC_CPU1_SPDMA_RW, 0);
+		if (retval) {
+			printf("scc_reset(SCC_CPU1_SPDMA_RW, 0) returned: 0x%x\n",
+			       retval);
+			return retval;
+		}
+	}
+
+	if (!retval) {
+		/*
+		 * For the AGU bypass, where the  SCC client provides full
+		 * physical address
+		 */
+		scc_set_usb_address_generation_mode(1);
+		scc_setup_dma(SCC_USB_RW, BCU_USB_BUFFER_1, DMA_LINEAR,
+			      USE_NO_FH, DMA_READ, 0);
+		scc_setup_dma(SCC_CPU1_SPDMA_RW, BCU_USB_BUFFER_1, DMA_LINEAR,
+			      USE_NO_FH, DMA_WRITE, 0);
+		scc_setup_dma(SCC_USB_RW, BCU_USB_BUFFER_0, DMA_LINEAR,
+			      USE_NO_FH, DMA_WRITE, 0);
+		scc_setup_dma(SCC_CPU1_SPDMA_RW, BCU_USB_BUFFER_0, DMA_LINEAR,
+			      USE_NO_FH, DMA_READ, 0);
+
+		/* Enable memory interface */
+		scc_enable(SCC_USB_RW, 1);
+
+		/* Start (start_cmd=0) DMAs */
+		scc_dma_cmd(SCC_USB_RW, DMA_START, 0, DMA_READ);
+		scc_dma_cmd(SCC_USB_RW, DMA_START, 0, DMA_WRITE);
+	} else {
+		printf("Cannot configure USB memory channel.\n");
+		printf("USB can not access RAM. SCC configuration failed.\n");
+		return retval;
+	}
+
+	/* Wait a short while */
+	udelay(300000);
+
+	reg_write(USBH_BURSTSIZE(USBH_BASE), 0x00001c1c);
+
+	/* Set EHCI structures and DATA in RAM */
+	reg_write(USBH_USBHMISC(USBH_BASE), 0x00840003);
+	/* Set USBMODE to bigendian and set host mode */
+	reg_write(USBH_USBMODE(USBH_BASE), 0x00000007);
+
+	/*
+	 * USBH_BURSTSIZE MUST EQUAL 0x00001c1c in order for
+	 * 512 byte USB transfers on the bulk pipe to work properly.
+	 * Set USBH_BURSTSIZE to 0x00001c1c
+	 */
+	reg_write(USBH_BURSTSIZE(USBH_BASE), 0x00001c1c);
+
+	/* Insert access register addresses */
+	*hccr = REG_GLOBAL_START_ADDR + USBH_CAPLENGTH(USBH_BASE);
+	*hcor = REG_GLOBAL_START_ADDR + USBH_USBCMD(USBH_BASE);
+
+	return 0;
+}