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/arch/x86/cpu/ivybridge/bd82x6x.c

@@ -0,0 +1,245 @@
+/*
+ * Copyright (C) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <malloc.h>
+#include <pch.h>
+#include <syscon.h>
+#include <asm/cpu.h>
+#include <asm/intel_regs.h>
+#include <asm/io.h>
+#include <asm/lapic.h>
+#include <asm/lpc_common.h>
+#include <asm/pci.h>
+#include <asm/arch/bd82x6x.h>
+#include <asm/arch/model_206ax.h>
+#include <asm/arch/pch.h>
+#include <asm/arch/sandybridge.h>
+
+#define GPIO_BASE	0x48
+#define BIOS_CTRL	0xdc
+
+#ifndef CONFIG_HAVE_FSP
+static int pch_revision_id = -1;
+static int pch_type = -1;
+
+/**
+ * pch_silicon_revision() - Read silicon revision ID from the PCH
+ *
+ * @dev:	PCH device
+ * @return silicon revision ID
+ */
+static int pch_silicon_revision(struct udevice *dev)
+{
+	u8 val;
+
+	if (pch_revision_id < 0) {
+		dm_pci_read_config8(dev, PCI_REVISION_ID, &val);
+		pch_revision_id = val;
+	}
+
+	return pch_revision_id;
+}
+
+int pch_silicon_type(struct udevice *dev)
+{
+	u8 val;
+
+	if (pch_type < 0) {
+		dm_pci_read_config8(dev, PCI_DEVICE_ID + 1, &val);
+		pch_type = val;
+	}
+
+	return pch_type;
+}
+
+/**
+ * pch_silicon_supported() - Check if a certain revision is supported
+ *
+ * @dev:	PCH device
+ * @type:	PCH type
+ * @rev:	Minimum required resion
+ * @return 0 if not supported, 1 if supported
+ */
+static int pch_silicon_supported(struct udevice *dev, int type, int rev)
+{
+	int cur_type = pch_silicon_type(dev);
+	int cur_rev = pch_silicon_revision(dev);
+
+	switch (type) {
+	case PCH_TYPE_CPT:
+		/* CougarPoint minimum revision */
+		if (cur_type == PCH_TYPE_CPT && cur_rev >= rev)
+			return 1;
+		/* PantherPoint any revision */
+		if (cur_type == PCH_TYPE_PPT)
+			return 1;
+		break;
+
+	case PCH_TYPE_PPT:
+		/* PantherPoint minimum revision */
+		if (cur_type == PCH_TYPE_PPT && cur_rev >= rev)
+			return 1;
+		break;
+	}
+
+	return 0;
+}
+
+#define IOBP_RETRY 1000
+static inline int iobp_poll(void)
+{
+	unsigned try = IOBP_RETRY;
+	u32 data;
+
+	while (try--) {
+		data = readl(RCB_REG(IOBPS));
+		if ((data & 1) == 0)
+			return 1;
+		udelay(10);
+	}
+
+	printf("IOBP timeout\n");
+	return 0;
+}
+
+void pch_iobp_update(struct udevice *dev, u32 address, u32 andvalue,
+		     u32 orvalue)
+{
+	u32 data;
+
+	/* Set the address */
+	writel(address, RCB_REG(IOBPIRI));
+
+	/* READ OPCODE */
+	if (pch_silicon_supported(dev, PCH_TYPE_CPT, PCH_STEP_B0))
+		writel(IOBPS_RW_BX, RCB_REG(IOBPS));
+	else
+		writel(IOBPS_READ_AX, RCB_REG(IOBPS));
+	if (!iobp_poll())
+		return;
+
+	/* Read IOBP data */
+	data = readl(RCB_REG(IOBPD));
+	if (!iobp_poll())
+		return;
+
+	/* Check for successful transaction */
+	if ((readl(RCB_REG(IOBPS)) & 0x6) != 0) {
+		printf("IOBP read 0x%08x failed\n", address);
+		return;
+	}
+
+	/* Update the data */
+	data &= andvalue;
+	data |= orvalue;
+
+	/* WRITE OPCODE */
+	if (pch_silicon_supported(dev, PCH_TYPE_CPT, PCH_STEP_B0))
+		writel(IOBPS_RW_BX, RCB_REG(IOBPS));
+	else
+		writel(IOBPS_WRITE_AX, RCB_REG(IOBPS));
+	if (!iobp_poll())
+		return;
+
+	/* Write IOBP data */
+	writel(data, RCB_REG(IOBPD));
+	if (!iobp_poll())
+		return;
+}
+
+static int bd82x6x_probe(struct udevice *dev)
+{
+	struct udevice *gma_dev;
+	int ret;
+
+	if (!(gd->flags & GD_FLG_RELOC))
+		return 0;
+
+	/* Cause the SATA device to do its init */
+	uclass_first_device(UCLASS_AHCI, &dev);
+
+	ret = syscon_get_by_driver_data(X86_SYSCON_GMA, &gma_dev);
+	if (ret)
+		return ret;
+	ret = gma_func0_init(gma_dev);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+#endif /* CONFIG_HAVE_FSP */
+
+static int bd82x6x_pch_get_spi_base(struct udevice *dev, ulong *sbasep)
+{
+	u32 rcba;
+
+	dm_pci_read_config32(dev, PCH_RCBA, &rcba);
+	/* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable */
+	rcba = rcba & 0xffffc000;
+	*sbasep = rcba + 0x3800;
+
+	return 0;
+}
+
+static int bd82x6x_set_spi_protect(struct udevice *dev, bool protect)
+{
+	return lpc_set_spi_protect(dev, BIOS_CTRL, protect);
+}
+
+static int bd82x6x_get_gpio_base(struct udevice *dev, u32 *gbasep)
+{
+	u32 base;
+
+	/*
+	 * GPIO_BASE moved to its current offset with ICH6, but prior to
+	 * that it was unused (or undocumented). Check that it looks
+	 * okay: not all ones or zeros.
+	 *
+	 * Note we don't need check bit0 here, because the Tunnel Creek
+	 * GPIO base address register bit0 is reserved (read returns 0),
+	 * while on the Ivybridge the bit0 is used to indicate it is an
+	 * I/O space.
+	 */
+	dm_pci_read_config32(dev, GPIO_BASE, &base);
+	if (base == 0x00000000 || base == 0xffffffff) {
+		debug("%s: unexpected BASE value\n", __func__);
+		return -ENODEV;
+	}
+
+	/*
+	 * Okay, I guess we're looking at the right device. The actual
+	 * GPIO registers are in the PCI device's I/O space, starting
+	 * at the offset that we just read. Bit 0 indicates that it's
+	 * an I/O address, not a memory address, so mask that off.
+	 */
+	*gbasep = base & 1 ? base & ~3 : base & ~15;
+
+	return 0;
+}
+
+static const struct pch_ops bd82x6x_pch_ops = {
+	.get_spi_base	= bd82x6x_pch_get_spi_base,
+	.set_spi_protect = bd82x6x_set_spi_protect,
+	.get_gpio_base	= bd82x6x_get_gpio_base,
+};
+
+static const struct udevice_id bd82x6x_ids[] = {
+	{ .compatible = "intel,bd82x6x" },
+	{ }
+};
+
+U_BOOT_DRIVER(bd82x6x_drv) = {
+	.name		= "bd82x6x",
+	.id		= UCLASS_PCH,
+	.of_match	= bd82x6x_ids,
+#ifndef CONFIG_HAVE_FSP
+	.probe		= bd82x6x_probe,
+#endif
+	.ops		= &bd82x6x_pch_ops,
+};