From: Marek Szyprowski <m.szyprowski@samsung.com>
Date: Mon, 7 Dec 2020 13:33:54 +0000 (+0100)
Subject: amlogic: vim3: add code for reading ethernet MAC address from efuse
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=303534b0f9cfca61f383e430dec49b05cc01a22e;p=platform%2Fkernel%2Fu-boot.git

amlogic: vim3: add code for reading ethernet MAC address from efuse

Add a simple code for reading built-in ethernet MAC address from efuse.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Change-Id: Ic1c39da270bc58f3b8e89a0631494e779281d46d
---

diff --git a/board/amlogic/w400/w400.c b/board/amlogic/w400/w400.c
index 1636415503..a420557920 100644
--- a/board/amlogic/w400/w400.c
+++ b/board/amlogic/w400/w400.c
@@ -12,6 +12,11 @@
 #include <asm/io.h>
 #include <asm/arch/boot.h>
 #include <asm/arch/eth.h>
+#include <asm/arch/sm.h>
+
+#define EFUSE_MAC_OFFSET	0
+#define EFUSE_MAC_SIZE		6
+#define MAC_ADDR_LEN		6
 
 int mmc_get_env_dev(void)
 {
@@ -23,7 +28,26 @@ int mmc_get_env_dev(void)
 
 int misc_init_r(void)
 {
+	u8 mac_addr[MAC_ADDR_LEN];
+	char efuse_mac_addr[EFUSE_MAC_SIZE];
+	ssize_t len;
+
 	meson_eth_init(PHY_INTERFACE_MODE_RGMII, 0);
 
+	if (!eth_env_get_enetaddr("ethaddr", mac_addr)) {
+		len = meson_sm_read_efuse(EFUSE_MAC_OFFSET,
+					  efuse_mac_addr, EFUSE_MAC_SIZE);
+		if (len != EFUSE_MAC_SIZE)
+			return 0;
+
+		for (int i = 0; i < 6; i++)
+			mac_addr[i] = efuse_mac_addr[i];
+
+		if (is_valid_ethaddr(mac_addr))
+			eth_env_set_enetaddr("ethaddr", mac_addr);
+		else
+			meson_generate_serial_ethaddr();
+	}
+
 	return 0;
 }