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/samsung/origen/Kconfig

@@ -0,0 +1,12 @@
+if TARGET_ORIGEN
+
+config SYS_BOARD
+	default "origen"
+
+config SYS_VENDOR
+	default "samsung"
+
+config SYS_CONFIG_NAME
+	default "origen"
+
+endif

u-boot/board/samsung/origen/MAINTAINERS

@@ -0,0 +1,6 @@
+ORIGEN BOARD
+M:	Chander Kashyap <k.chander@samsung.com>
+S:	Maintained
+F:	board/samsung/origen/
+F:	include/configs/origen.h
+F:	configs/origen_defconfig

u-boot/board/samsung/origen/Makefile

@@ -0,0 +1,22 @@
+#
+# Copyright (C) 2011 Samsung Electronics
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+ifdef CONFIG_SPL_BUILD
+# necessary to create built-in.o
+obj- := __dummy__.o
+
+hostprogs-y := tools/mkorigenspl
+always := $(hostprogs-y)
+
+# omit -O2 option to suppress
+#   warning: dereferencing type-punned pointer will break strict-aliasing rules
+#
+# TODO:
+# Fix the root cause in tools/mkorigenspl.c and delete the following work-around
+$(obj)/tools/mkorigenspl: HOSTCFLAGS:=$(filter-out -O2,$(HOSTCFLAGS))
+else
+obj-y	+= origen.o
+endif

u-boot/board/samsung/origen/origen.c

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/mmc.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
+#include <usb.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+u32 get_board_rev(void)
+{
+	return 0;
+}
+
+int exynos_init(void)
+{
+	return 0;
+}
+
+int board_usb_init(int index, enum usb_init_type init)
+{
+	return 0;
+}
+
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+int exynos_early_init_f(void)
+{
+	return 0;
+}
+#endif

u-boot/board/samsung/origen/tools/mkorigenspl.c

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#define BUFSIZE			(16*1024)
+#define IMG_SIZE		(16*1024)
+#define SPL_HEADER_SIZE		16
+#define FILE_PERM		(S_IRUSR | S_IWUSR | S_IRGRP \
+				| S_IWGRP | S_IROTH | S_IWOTH)
+#define SPL_HEADER		"S5PC210 HEADER  "
+/*
+* Requirement:
+* IROM code reads first 14K bytes from boot device.
+* It then calculates the checksum of 14K-4 bytes and compare with data at
+* 14K-4 offset.
+*
+* This function takes two filenames:
+* IN  "u-boot-spl.bin" and
+* OUT "$(BOARD)-spl.bin as filenames.
+* It reads the "u-boot-spl.bin" in 16K buffer.
+* It calculates checksum of 14K-4 Bytes and stores at 14K-4 offset in buffer.
+* It writes the buffer to "$(BOARD)-spl.bin" file.
+*/
+
+int main(int argc, char **argv)
+{
+	int i, len;
+	unsigned char buffer[BUFSIZE] = {0};
+	int ifd, ofd;
+	unsigned int checksum = 0, count;
+
+	if (argc != 3) {
+		printf(" %d Wrong number of arguments\n", argc);
+		exit(EXIT_FAILURE);
+	}
+
+	ifd = open(argv[1], O_RDONLY);
+	if (ifd < 0) {
+		fprintf(stderr, "%s: Can't open %s: %s\n",
+			argv[0], argv[1], strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	ofd = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, FILE_PERM);
+	if (ofd < 0) {
+		fprintf(stderr, "%s: Can't open %s: %s\n",
+			argv[0], argv[2], strerror(errno));
+		if (ifd)
+			close(ifd);
+		exit(EXIT_FAILURE);
+	}
+
+	len = lseek(ifd, 0, SEEK_END);
+	lseek(ifd, 0, SEEK_SET);
+
+	memcpy(&buffer[0], SPL_HEADER, SPL_HEADER_SIZE);
+
+	count = (len < (IMG_SIZE - SPL_HEADER_SIZE))
+		? len : (IMG_SIZE - SPL_HEADER_SIZE);
+
+	if (read(ifd, buffer + SPL_HEADER_SIZE, count) != count) {
+		fprintf(stderr, "%s: Can't read %s: %s\n",
+			argv[0], argv[1], strerror(errno));
+
+		if (ifd)
+			close(ifd);
+		if (ofd)
+			close(ofd);
+
+		exit(EXIT_FAILURE);
+	}
+
+	for (i = 0; i < IMG_SIZE - SPL_HEADER_SIZE; i++)
+		checksum += buffer[i+16];
+
+	*(unsigned long *)buffer ^= 0x1f;
+	*(unsigned long *)(buffer+4) ^= checksum;
+
+	for (i = 1; i < SPL_HEADER_SIZE; i++)
+		buffer[i] ^= buffer[i-1];
+
+	if (write(ofd, buffer, BUFSIZE) != BUFSIZE) {
+		fprintf(stderr, "%s: Can't write %s: %s\n",
+			argv[0], argv[2], strerror(errno));
+
+		if (ifd)
+			close(ifd);
+		if (ofd)
+			close(ofd);
+
+		exit(EXIT_FAILURE);
+	}
+
+	if (ifd)
+		close(ifd);
+	if (ofd)
+		close(ofd);
+
+	return EXIT_SUCCESS;
+}