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>

diff --git a/arch/arm/include/asm/arch-omap4/omap.h b/arch/arm/include/asm/arch-omap4/omap.h
index 9129c0dd7cb005c4ed0494b367c3956c0503266a..e35f51c7bf6946b52a66a992554033e0b4d514df 100644 (file)
--- 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 e838ffd95476c8041e5e547607a93e4fb39b0da5..bc3c29220e1c3f7420b7c79ce62cfc3e3c7066b0 100644 (file)
--- 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;
 }