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 1636415503fa4705e78ba77672b689e6907a078c..a420557920513e0f034944d7cad48a016c84b90f 100644 (file)
--- 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;
 }