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/smdkv310/Kconfig

@@ -0,0 +1,12 @@
+if TARGET_SMDKV310
+
+config SYS_BOARD
+	default "smdkv310"
+
+config SYS_VENDOR
+	default "samsung"
+
+config SYS_CONFIG_NAME
+	default "smdkv310"
+
+endif

u-boot/board/samsung/smdkv310/MAINTAINERS

@@ -0,0 +1,6 @@
+SMDKV310 BOARD
+M:	Chander Kashyap <k.chander@samsung.com>
+S:	Maintained
+F:	board/samsung/smdkv310/
+F:	include/configs/smdkv310.h
+F:	configs/smdkv310_defconfig

u-boot/board/samsung/smdkv310/Makefile

@@ -0,0 +1,15 @@
+#
+# 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/mksmdkv310spl
+always := $(hostprogs-y)
+else
+obj-y	+= smdkv310.o
+endif

u-boot/board/samsung/smdkv310/smdkv310.c

@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <netdev.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/mmc.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/sromc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void smc9115_pre_init(void)
+{
+	u32 smc_bw_conf, smc_bc_conf;
+
+	/* gpio configuration GPK0CON */
+	gpio_cfg_pin(EXYNOS4_GPIO_Y00 + CONFIG_ENV_SROM_BANK, S5P_GPIO_FUNC(2));
+
+	/* Ethernet needs bus width of 16 bits */
+	smc_bw_conf = SROMC_DATA16_WIDTH(CONFIG_ENV_SROM_BANK);
+	smc_bc_conf = SROMC_BC_TACS(0x0F) | SROMC_BC_TCOS(0x0F)
+			| SROMC_BC_TACC(0x0F) | SROMC_BC_TCOH(0x0F)
+			| SROMC_BC_TAH(0x0F)  | SROMC_BC_TACP(0x0F)
+			| SROMC_BC_PMC(0x0F);
+
+	/* Select and configure the SROMC bank */
+	s5p_config_sromc(CONFIG_ENV_SROM_BANK, smc_bw_conf, smc_bc_conf);
+}
+
+int board_init(void)
+{
+	smc9115_pre_init();
+
+	gd->bd->bi_boot_params = (PHYS_SDRAM_1 + 0x100UL);
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size	= get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE)
+			+ get_ram_size((long *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE)
+			+ get_ram_size((long *)PHYS_SDRAM_3, PHYS_SDRAM_3_SIZE)
+			+ get_ram_size((long *)PHYS_SDRAM_4, PHYS_SDRAM_4_SIZE);
+
+	return 0;
+}
+
+void dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = get_ram_size((long *)PHYS_SDRAM_1,
+							PHYS_SDRAM_1_SIZE);
+	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
+	gd->bd->bi_dram[1].size = get_ram_size((long *)PHYS_SDRAM_2,
+							PHYS_SDRAM_2_SIZE);
+	gd->bd->bi_dram[2].start = PHYS_SDRAM_3;
+	gd->bd->bi_dram[2].size = get_ram_size((long *)PHYS_SDRAM_3,
+							PHYS_SDRAM_3_SIZE);
+	gd->bd->bi_dram[3].start = PHYS_SDRAM_4;
+	gd->bd->bi_dram[3].size = get_ram_size((long *)PHYS_SDRAM_4,
+							PHYS_SDRAM_4_SIZE);
+}
+
+int board_eth_init(bd_t *bis)
+{
+	int rc = 0;
+#ifdef CONFIG_SMC911X
+	rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
+#endif
+	return rc;
+}
+
+#ifdef CONFIG_DISPLAY_BOARDINFO
+int checkboard(void)
+{
+	printf("\nBoard: SMDKV310\n");
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_GENERIC_MMC
+int board_mmc_init(bd_t *bis)
+{
+	int i, err;
+
+	/*
+	 * MMC2 SD card GPIO:
+	 *
+	 * GPK2[0]	SD_2_CLK(2)
+	 * GPK2[1]	SD_2_CMD(2)
+	 * GPK2[2]	SD_2_CDn
+	 * GPK2[3:6]	SD_2_DATA[0:3](2)
+	 */
+	for (i = EXYNOS4_GPIO_K20; i < EXYNOS4_GPIO_K27; i++) {
+		/* GPK2[0:6] special function 2 */
+		gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
+
+		/* GPK2[0:6] drv 4x */
+		gpio_set_drv(i, S5P_GPIO_DRV_4X);
+
+		/* GPK2[0:1] pull disable */
+		if (i == EXYNOS4_GPIO_K20 || i == EXYNOS4_GPIO_K21) {
+			gpio_set_pull(i, S5P_GPIO_PULL_NONE);
+			continue;
+		}
+
+		/* GPK2[2:6] pull up */
+		gpio_set_pull(i, S5P_GPIO_PULL_UP);
+	}
+	err = s5p_mmc_init(2, 4);
+	return err;
+}
+#endif
+
+static int board_uart_init(void)
+{
+	int err;
+
+	err = exynos_pinmux_config(PERIPH_ID_UART0, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART0 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART1, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART1 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART2, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART2 not configured\n");
+		return err;
+	}
+
+	err = exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
+	if (err) {
+		debug("UART3 not configured\n");
+		return err;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+int board_early_init_f(void)
+{
+	int err;
+	err = board_uart_init();
+	if (err) {
+		debug("UART init failed\n");
+		return err;
+	}
+	return err;
+}
+#endif

u-boot/board/samsung/smdkv310/tools/mksmdkv310spl.c

@@ -0,0 +1,101 @@
+/*
+ * 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 CHECKSUM_OFFSET		(14*1024-4)
+#define BUFSIZE			(16*1024)
+#define FILE_PERM		(S_IRUSR | S_IWUSR | S_IRGRP \
+				| S_IWGRP | S_IROTH | S_IWOTH)
+/*
+* 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 "u-boot-mmc-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 "u-boot-mmc-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);
+
+	count = (len < CHECKSUM_OFFSET) ? len : CHECKSUM_OFFSET;
+
+	if (read(ifd, buffer, 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, checksum = 0; i < CHECKSUM_OFFSET; i++)
+		checksum += buffer[i];
+
+	memcpy(&buffer[CHECKSUM_OFFSET], &checksum, sizeof(checksum));
+
+	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;
+}