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/in-circuit/grasshopper/Kconfig

@@ -0,0 +1,15 @@
+if TARGET_GRASSHOPPER
+
+config SYS_BOARD
+	default "grasshopper"
+
+config SYS_VENDOR
+	default "in-circuit"
+
+config SYS_SOC
+	default "at32ap700x"
+
+config SYS_CONFIG_NAME
+	default "grasshopper"
+
+endif

u-boot/board/in-circuit/grasshopper/MAINTAINERS

@@ -0,0 +1,6 @@
+GRASSHOPPER BOARD
+M:	Andreas Bießmann <andreas@biessmann.org>
+S:	Maintained
+F:	board/in-circuit/grasshopper/
+F:	include/configs/grasshopper.h
+F:	configs/grasshopper_defconfig

u-boot/board/in-circuit/grasshopper/Makefile

@@ -0,0 +1,10 @@
+#
+# (C) Copyright 2001-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# Copyright (C) 2011
+# Corscience GmbH & Co.KG, Andreas Bießmann <biessmann@corscience.de>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+
+obj-y += grasshopper.o

u-boot/board/in-circuit/grasshopper/grasshopper.c

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2011
+ * Corscience GmbH & Co.KG, Andreas Bießmann <biessmann@corscience.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+
+#include <asm/io.h>
+#include <asm/sdram.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/hmatrix.h>
+#include <asm/arch/mmu.h>
+#include <asm/arch/portmux.h>
+#include <netdev.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
+	{
+		.virt_pgno	= CONFIG_SYS_FLASH_BASE >> MMU_PAGE_SHIFT,
+		.nr_pages	= CONFIG_SYS_FLASH_SIZE >> MMU_PAGE_SHIFT,
+		.phys		= (CONFIG_SYS_FLASH_BASE >> MMU_PAGE_SHIFT)
+				| MMU_VMR_CACHE_NONE,
+	}, {
+		.virt_pgno	= CONFIG_SYS_SDRAM_BASE >> MMU_PAGE_SHIFT,
+		.nr_pages	= EBI_SDRAM_SIZE >> MMU_PAGE_SHIFT,
+		.phys		= (CONFIG_SYS_SDRAM_BASE >> MMU_PAGE_SHIFT)
+				| MMU_VMR_CACHE_WRBACK,
+	},
+};
+
+static const struct sdram_config sdram_config = {
+	/* Dual MT48LC16M16A2-7E (or equal) */
+	.data_bits		= SDRAM_DATA_32BIT,
+	.row_bits		= 13,
+	.col_bits		= 9,
+	.bank_bits		= 2,
+	.cas			= 2,
+	.twr			= 2,
+	.trc			= 7,
+	.trp			= 2,
+	.trcd			= 2,
+	.tras			= 4,
+	.txsr			= 7,
+	/* 7.81 us */
+	.refresh_period		= (781 * (SDRAMC_BUS_HZ / 1000)) / 100000,
+};
+
+int board_early_init_f(void)
+{
+	/* Enable SDRAM in the EBI mux */
+	hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
+
+	portmux_enable_ebi(SDRAM_DATA_32BIT, 23, 0, PORTMUX_DRIVE_HIGH);
+	sdram_init(uncached(EBI_SDRAM_BASE), &sdram_config);
+
+	portmux_enable_usart0(PORTMUX_DRIVE_MIN);
+	portmux_enable_usart1(PORTMUX_DRIVE_MIN);
+#if defined(CONFIG_MACB)
+	/* set PHY reset and pwrdown to low */
+	portmux_select_gpio(PORTMUX_PORT_B, (1 << 29) | (1 << 30),
+		PORTMUX_DIR_OUTPUT | PORTMUX_INIT_LOW);
+	udelay(100);
+	/* release PHYs reset */
+	gpio_set_value(GPIO_PIN_PB(29), 1);
+
+	portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_LOW);
+#endif
+
+	return 0;
+}
+
+int board_early_init_r(void)
+{
+	gd->bd->bi_phy_id[0] = 0x00;
+	return 0;
+}
+
+#ifdef CONFIG_CMD_NET
+int board_eth_init(bd_t *bi)
+{
+	macb_eth_initialize(0, (void *)ATMEL_BASE_MACB0, bi->bi_phy_id[0]);
+	return 0;
+}
+#endif
+/* vim: set noet ts=8: */