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/intel/cougarcanyon2/cougarcanyon2.c

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <pci.h>
+#include <smsc_sio1007.h>
+#include <asm/ibmpc.h>
+#include <asm/lpc_common.h>
+#include <asm/pci.h>
+#include <asm/arch/pch.h>
+
+#define SIO1007_RUNTIME_IOPORT	0x180
+
+int board_early_init_f(void)
+{
+	struct udevice *pch;
+	int ret;
+
+	ret = uclass_first_device(UCLASS_PCH, &pch);
+	if (ret)
+		return ret;
+	if (!pch)
+		return -ENODEV;
+
+	/* Initialize LPC interface to turn on superio chipset decode range */
+	dm_pci_write_config16(pch, LPC_IO_DEC, COMA_DEC_RANGE | COMB_DEC_RANGE);
+	dm_pci_write_config16(pch, LPC_EN, KBC_LPC_EN | COMA_LPC_EN);
+	dm_pci_write_config32(pch, LPC_GEN1_DEC, GEN_DEC_RANGE_256B |
+			      (SIO1007_IOPORT3 & 0xff00) | GEN_DEC_RANGE_EN);
+	dm_pci_write_config32(pch, LPC_GEN2_DEC, GEN_DEC_RANGE_16B |
+			      SIO1007_RUNTIME_IOPORT | GEN_DEC_RANGE_EN);
+
+	/* Enable legacy serial port at 0x3f8 */
+	sio1007_enable_serial(SIO1007_IOPORT3, 0, UART0_BASE, UART0_IRQ);
+
+	/* Enable SIO1007 runtime I/O port at 0x180 */
+	sio1007_enable_runtime(SIO1007_IOPORT3, SIO1007_RUNTIME_IOPORT);
+
+	/*
+	 * On Cougar Canyon 2 board, the RS232 transiver connected to serial
+	 * port 0 (0x3f8) is controlled by a GPIO pin (GPIO10) on the SIO1007.
+	 * Set the pin value to 1 to enable the RS232 transiver.
+	 */
+	sio1007_gpio_config(SIO1007_IOPORT3, 0, GPIO_DIR_OUTPUT,
+			    GPIO_POL_NO_INVERT, GPIO_TYPE_PUSH_PULL);
+	sio1007_gpio_set_value(SIO1007_RUNTIME_IOPORT, 0, 1);
+
+	return 0;
+}