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/timll/devkit3250/Kconfig

@@ -0,0 +1,15 @@
+if TARGET_DEVKIT3250
+
+config SYS_BOARD
+	default "devkit3250"
+
+config SYS_VENDOR
+	default "timll"
+
+config SYS_SOC
+	default "lpc32xx"
+
+config SYS_CONFIG_NAME
+	default "devkit3250"
+
+endif

u-boot/board/timll/devkit3250/MAINTAINERS

@@ -0,0 +1,6 @@
+DEVKIT3250 BOARD
+M:	Vladimir Zapolskiy <vz@mleia.com>
+S:	Maintained
+F:	board/timll/devkit3250/
+F:	include/configs/devkit3250.h
+F:	configs/devkit3250_defconfig

u-boot/board/timll/devkit3250/Makefile

@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2011 by Vladimir Zapolskiy <vz@mleia.com>
+# Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= devkit3250.o
+obj-$(CONFIG_SPL_BUILD) += devkit3250_spl.o

u-boot/board/timll/devkit3250/devkit3250.c

@@ -0,0 +1,81 @@
+/*
+ * Embest/Timll DevKit3250 board support
+ *
+ * Copyright (C) 2011-2015 Vladimir Zapolskiy <vz@mleia.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/emc.h>
+#include <asm/arch/wdt.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct emc_regs *emc = (struct emc_regs *)EMC_BASE;
+static struct clk_pm_regs *clk = (struct clk_pm_regs *)CLK_PM_BASE;
+static struct wdt_regs *wdt = (struct wdt_regs *)WDT_BASE;
+
+void reset_periph(void)
+{
+	/* This function resets peripherals by triggering RESOUT_N */
+	setbits_le32(&clk->timclk_ctrl, CLK_TIMCLK_WATCHDOG);
+	writel(WDTIM_MCTRL_RESFRC1, &wdt->mctrl);
+	udelay(300);
+
+	writel(0, &wdt->mctrl);
+	clrbits_le32(&clk->timclk_ctrl, CLK_TIMCLK_WATCHDOG);
+
+	/* Such a long delay is needed to initialize SMSC phy */
+	udelay(10000);
+}
+
+int board_early_init_f(void)
+{
+	lpc32xx_uart_init(CONFIG_SYS_LPC32XX_UART);
+	lpc32xx_i2c_init(1);
+	lpc32xx_i2c_init(2);
+	lpc32xx_ssp_init();
+	lpc32xx_mac_init();
+
+	/*
+	 * nWP may be controlled by GPO19, but unpopulated by default R23
+	 * makes no sense to configure this GPIO level, nWP is always high
+	 */
+	lpc32xx_slc_nand_init();
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params  = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+#ifdef CONFIG_SYS_FLASH_CFI
+	/* Use 16-bit memory interface for NOR Flash */
+	emc->stat[0].config	= EMC_STAT_CONFIG_PB | EMC_STAT_CONFIG_16BIT;
+
+	/* Change the NOR timings to optimum value to get maximum bandwidth */
+	emc->stat[0].waitwen	= EMC_STAT_WAITWEN(1);
+	emc->stat[0].waitoen	= EMC_STAT_WAITOEN(0);
+	emc->stat[0].waitrd	= EMC_STAT_WAITRD(12);
+	emc->stat[0].waitpage	= EMC_STAT_WAITPAGE(12);
+	emc->stat[0].waitwr	= EMC_STAT_WAITWR(5);
+	emc->stat[0].waitturn	= EMC_STAT_WAITTURN(2);
+#endif
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
+				    CONFIG_SYS_SDRAM_SIZE);
+
+	return 0;
+}

u-boot/board/timll/devkit3250/devkit3250_spl.c

@@ -0,0 +1,68 @@
+/*
+ * Timll DevKit3250 board support, SPL board configuration
+ *
+ * (C) Copyright 2015 Vladimir Zapolskiy <vz@mleia.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/emc.h>
+#include <asm/arch-lpc32xx/gpio.h>
+#include <spl.h>
+
+static struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;
+
+/*
+ * SDRAM K4S561632N-LC60 settings are selected in assumption that
+ * SDRAM clock may be set up to 166 MHz, however at the moment
+ * it is 104 MHz. Most delay values are converted to be a multiple of
+ * base clock, and precise pinned values are not needed here.
+ */
+struct emc_dram_settings dram_64mb = {
+	.cmddelay	= 0x0001C000,
+	.config0	= 0x00005682,
+	.rascas0	= 0x00000302,
+	.rdconfig	= 0x00000011,	/* undocumented but crucial value */
+
+	.trp	= 83333333,
+	.tras	= 23809524,
+	.tsrex	= 12500000,
+	.twr	= 83000000,		/* tWR = tRDL = 2 CLK */
+	.trc	= 15384616,
+	.trfc	= 15384616,
+	.txsr	= 12500000,
+	.trrd	= 1,
+	.tmrd	= 1,
+	.tcdlr	= 0,
+
+	.refresh	= 130000,	/* 800 clock cycles */
+
+	.mode	= 0x00018000,
+	.emode	= 0x02000000,
+};
+
+void spl_board_init(void)
+{
+	/* First of all silence buzzer controlled by GPO_20 */
+	writel((1 << 20), &gpio->p3_outp_clr);
+
+	lpc32xx_uart_init(CONFIG_SYS_LPC32XX_UART);
+	preloader_console_init();
+
+	ddr_init(&dram_64mb);
+
+	/*
+	 * NAND initialization is done by nand_init(),
+	 * here just enable NAND SLC clocks
+	 */
+	lpc32xx_slc_nand_init();
+}
+
+u32 spl_boot_device(void)
+{
+	return BOOT_DEVICE_NAND;
+}