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authorDan Murphy <dmurphy@ti.com>2013-10-10 08:54:23 -0500
committerTom Rini <trini@ti.com>2013-10-14 16:06:53 -0400
commite84b8f6ce0e7daf4e9781172c4ffd74d7d525dbb (patch)
tree65f772f97d5687cd8793b66d10a3bbad4564f3f8
parentb0c3b1195a2e85e32d7d1610d3683b48750e7394 (diff)
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ARM: omap4-panda: Add MAC address creation for panda
Add a MAC address create based on the OMAP die ID registers. Then poplulate the ethaddr enviroment variable so that the device tree alias can be updated prior to boot. Signed-off-by: Dan Murphy <dmurphy@ti.com>
-rw-r--r--arch/arm/include/asm/arch-omap4/omap.h4
-rw-r--r--board/ti/panda/panda.c16
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-omap4/omap.h b/arch/arm/include/asm/arch-omap4/omap.h
index 9129c0dd7c..e35f51c7bf 100644
--- a/arch/arm/include/asm/arch-omap4/omap.h
+++ b/arch/arm/include/asm/arch-omap4/omap.h
@@ -33,6 +33,10 @@
/* CONTROL_ID_CODE */
#define CONTROL_ID_CODE 0x4A002204
+#define STD_FUSE_DIE_ID_0 0x4A002200
+#define STD_FUSE_DIE_ID_1 0x4A002208
+#define STD_FUSE_DIE_ID_2 0x4A00220c
+#define STD_FUSE_DIE_ID_3 0x4A002210
#define OMAP4_CONTROL_ID_CODE_ES1_0 0x0B85202F
#define OMAP4_CONTROL_ID_CODE_ES2_0 0x1B85202F
diff --git a/board/ti/panda/panda.c b/board/ti/panda/panda.c
index e838ffd954..bc3c29220e 100644
--- a/board/ti/panda/panda.c
+++ b/board/ti/panda/panda.c
@@ -133,6 +133,7 @@ int misc_init_r(void)
{
int phy_type;
u32 auxclk, altclksrc;
+ uint8_t device_mac[6];
/* EHCI is not supported on ES1.0 */
if (omap_revision() == OMAP4430_ES1_0)
@@ -186,6 +187,21 @@ int misc_init_r(void)
writel(altclksrc, &scrm->altclksrc);
+ if (!getenv("usbethaddr")) {
+ /*
+ * create a fake MAC address from the processor ID code.
+ * first byte is 0x02 to signify locally administered.
+ */
+ device_mac[0] = 0x02;
+ device_mac[1] = readl(STD_FUSE_DIE_ID_3) & 0xff;
+ device_mac[2] = readl(STD_FUSE_DIE_ID_2) & 0xff;
+ device_mac[3] = readl(STD_FUSE_DIE_ID_1) & 0xff;
+ device_mac[4] = readl(STD_FUSE_DIE_ID_0) & 0xff;
+ device_mac[5] = (readl(STD_FUSE_DIE_ID_0) >> 8) & 0xff;
+
+ eth_setenv_enetaddr("usbethaddr", device_mac);
+ }
+
return 0;
}
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