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/gdsys/dlvision/dlvision.c

@@ -0,0 +1,122 @@
+/*
+ * (C) Copyright 2009
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/ppc4xx-gpio.h>
+
+enum {
+	HWTYPE_DLVISION_CPU = 0,
+	HWTYPE_DLVISION_CON = 1,
+};
+
+#define HWREV_100	6
+
+int board_early_init_f(void)
+{
+	mtdcr(UIC0SR, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr(UIC0ER, 0x00000000);	/* disable all ints */
+	mtdcr(UIC0CR, 0x00000000);	/* set all to be non-critical */
+	mtdcr(UIC0PR, 0xFFFFFF80);	/* set int polarities */
+	mtdcr(UIC0TR, 0x10000000);	/* set int trigger levels */
+	mtdcr(UIC0VCR, 0x00000001);	/* set vect base=0,INT0 highest prio */
+	mtdcr(UIC0SR, 0xFFFFFFFF);	/* clear all ints */
+
+	/*
+	 * EBC Configuration Register: set ready timeout to 512 ebc-clks
+	 * -> ca. 15 us
+	 */
+	mtebc(EBC0_CFG, 0xa8400000);	/* ebc always driven */
+
+	/*
+	 * setup io-latches
+	 */
+	out_le16((void *)CONFIG_SYS_LATCH_BASE, 0x00f0);
+	out_le16((void *)(CONFIG_SYS_LATCH_BASE + 0x100), 0x0002);
+	out_le16((void *)(CONFIG_SYS_LATCH_BASE + 0x200), 0x0000);
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	/*
+	 * set "startup-finished"-gpios
+	 */
+	gpio_write_bit(21, 0);
+	gpio_write_bit(22, 1);
+
+	return 0;
+}
+
+/*
+ * Check Board Identity:
+ */
+int checkboard(void)
+{
+	char buf[64];
+	int i = getenv_f("serial#", buf, sizeof(buf));
+	u8 channel2_msr = in_8((void *)CONFIG_UART_BASE + 0x26);
+	u8 channel3_msr = in_8((void *)CONFIG_UART_BASE + 0x36);
+	u8 channel7_msr = in_8((void *)CONFIG_UART_BASE + 0x76);
+	u8 unit_type;
+	u8 local_con;
+	u8 audio;
+	u8 hardware_version;
+
+	printf("Board: ");
+
+	unit_type = (channel2_msr & 0x80) ? 0x01 : 0x00;
+	local_con = (channel2_msr & 0x20) ? 0x01 : 0x00;
+	audio = (channel3_msr & 0x20) ? 0x01 : 0x00;
+	hardware_version =
+		  ((channel7_msr & 0x20) ? 0x01 : 0x00)
+		| ((channel7_msr & 0x80) ? 0x02 : 0x00)
+		| ((channel7_msr & 0x40) ? 0x04 : 0x00);
+
+	switch (unit_type) {
+	case HWTYPE_DLVISION_CON:
+		printf("DL-Vision-CON");
+		break;
+
+	case HWTYPE_DLVISION_CPU:
+		printf("DL-Vision-CPU");
+		break;
+
+	default:
+		printf("UnitType %d, unsupported", unit_type);
+		break;
+	}
+
+	if (i > 0) {
+		puts(", serial# ");
+		puts(buf);
+	}
+	puts("\n       ");
+
+	switch (hardware_version) {
+	case HWREV_100:
+		printf("HW-Ver 1.00");
+		break;
+
+	default:
+		printf("HW-Ver %d, unsupported",
+		       hardware_version);
+		break;
+	}
+
+	if (local_con)
+		printf(", local console");
+
+	if (audio)
+		printf(", audio support");
+
+	puts("\n");
+
+	return 0;
+}