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/net/eth_common.c

@@ -0,0 +1,166 @@
+/*
+ * (C) Copyright 2001-2015
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * Joe Hershberger, National Instruments
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <miiphy.h>
+#include <net.h>
+#include "eth_internal.h"
+
+void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
+{
+	char *end;
+	int i;
+
+	for (i = 0; i < 6; ++i) {
+		enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
+		if (addr)
+			addr = (*end) ? end + 1 : end;
+	}
+}
+
+int eth_getenv_enetaddr(const char *name, uchar *enetaddr)
+{
+	eth_parse_enetaddr(getenv(name), enetaddr);
+	return is_valid_ethaddr(enetaddr);
+}
+
+int eth_setenv_enetaddr(const char *name, const uchar *enetaddr)
+{
+	char buf[20];
+
+	sprintf(buf, "%pM", enetaddr);
+
+	return setenv(name, buf);
+}
+
+int eth_getenv_enetaddr_by_index(const char *base_name, int index,
+				 uchar *enetaddr)
+{
+	char enetvar[32];
+	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
+	return eth_getenv_enetaddr(enetvar, enetaddr);
+}
+
+int eth_setenv_enetaddr_by_index(const char *base_name, int index,
+				 uchar *enetaddr)
+{
+	char enetvar[32];
+	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
+	return eth_setenv_enetaddr(enetvar, enetaddr);
+}
+
+void eth_common_init(void)
+{
+	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
+#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
+	miiphy_init();
+#endif
+
+#ifdef CONFIG_PHYLIB
+	phy_init();
+#endif
+}
+
+int eth_mac_skip(int index)
+{
+	char enetvar[15];
+	char *skip_state;
+
+	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
+	skip_state = getenv(enetvar);
+	return skip_state != NULL;
+}
+
+void eth_current_changed(void)
+{
+	char *act = getenv("ethact");
+	char *ethrotate;
+
+	/*
+	 * The call to eth_get_dev() below has a side effect of rotating
+	 * ethernet device if uc_priv->current == NULL. This is not what
+	 * we want when 'ethrotate' variable is 'no'.
+	 */
+	ethrotate = getenv("ethrotate");
+	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
+		return;
+
+	/* update current ethernet name */
+	if (eth_get_dev()) {
+		if (act == NULL || strcmp(act, eth_get_name()) != 0)
+			setenv("ethact", eth_get_name());
+	}
+	/*
+	 * remove the variable completely if there is no active
+	 * interface
+	 */
+	else if (act != NULL)
+		setenv("ethact", NULL);
+}
+
+void eth_try_another(int first_restart)
+{
+	static void *first_failed;
+	char *ethrotate;
+
+	/*
+	 * Do not rotate between network interfaces when
+	 * 'ethrotate' variable is set to 'no'.
+	 */
+	ethrotate = getenv("ethrotate");
+	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
+		return;
+
+	if (!eth_get_dev())
+		return;
+
+	if (first_restart)
+		first_failed = eth_get_dev();
+
+	eth_set_current_to_next();
+
+	eth_current_changed();
+
+	if (first_failed == eth_get_dev())
+		net_restart_wrap = 1;
+}
+
+void eth_set_current(void)
+{
+	static char *act;
+	static int  env_changed_id;
+	int	env_id;
+
+	env_id = get_env_id();
+	if ((act == NULL) || (env_changed_id != env_id)) {
+		act = getenv("ethact");
+		env_changed_id = env_id;
+	}
+
+	if (act == NULL) {
+		char *ethprime = getenv("ethprime");
+		void *dev = NULL;
+
+		if (ethprime)
+			dev = eth_get_dev_by_name(ethprime);
+		if (dev)
+			eth_set_dev(dev);
+		else
+			eth_set_dev(NULL);
+	} else {
+		eth_set_dev(eth_get_dev_by_name(act));
+	}
+
+	eth_current_changed();
+}
+
+const char *eth_get_name(void)
+{
+	return eth_get_dev() ? eth_get_dev()->name : "unknown";
+}