board: samsung: Update MAC address for Arndale board through GUID
There are a couple of GUID (Global Unique Identifier) registers within
EXYNOS5250 SoC. The values of these GUID registers are set as board
MAC address.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
diff --git a/arch/arm/include/asm/arch-exynos/cpu.h b/arch/arm/include/asm/arch-exynos/cpu.h
index 206df21..a6a7f9a 100644
--- a/arch/arm/include/asm/arch-exynos/cpu.h
+++ b/arch/arm/include/asm/arch-exynos/cpu.h
@@ -67,6 +67,8 @@
#define EXYNOS5_GPIO_PART4_BASE 0x03860000
#define EXYNOS5_PRO_ID 0x10000000
+#define EXYNOS5_GUID_LOW 0x10000014
+#define EXYNOS5_GUID_HIGH 0x10000018
#define EXYNOS5_CLOCK_BASE 0x10010000
#define EXYNOS5_POWER_BASE 0x10040000
#define EXYNOS5_SWRESET 0x10040400
diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
index d70976d..28cf0af 100644
--- a/board/samsung/smdk5250/smdk5250.c
+++ b/board/samsung/smdk5250/smdk5250.c
@@ -224,9 +224,25 @@
#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
+ int i;
+ uchar mac[6];
+ unsigned int guid_high = readl(EXYNOS5_GUID_HIGH);
+ unsigned int guid_low = readl(EXYNOS5_GUID_LOW);
+
+ for (i = 0; i < 2; i++)
+ mac[i] = (guid_high >> (8 * (1 - i))) & 0xFF;
+
+ for (i = 0; i < 4; i++)
+ mac[i+2] = (guid_low >> (8 * (3 - i))) & 0xFF;
+
+ /* mark it as not multicast and outside official 80211 MAC namespace */
+ mac[0] = (mac[0] & ~0x1) | 0x2;
+
+ eth_setenv_enetaddr("ethaddr", mac);
+ eth_setenv_enetaddr("usbethaddr", mac);
+
#ifdef CONFIG_PREBOOT
setenv("preboot", CONFIG_PREBOOT);
- setenv("usbethaddr", "00:40:5c:26:0a:5b");
#endif
}
#endif
