Patchwork [U-Boot,v2] ARM: omap4-panda: Add MAC address creation for panda

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Submitter Dan Murphy
Date Oct. 10, 2013, 1:54 p.m.
Message ID <1381413263-11809-1-git-send-email-dmurphy@ti.com>
Download mbox | patch
Permalink /patch/282266/
State Accepted
Delegated to: Tom Rini
Headers show

Comments

Dan Murphy - Oct. 10, 2013, 1:54 p.m.
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>
---

v2 - Change ethaddr->usbethaddr per comments- http://patchwork.ozlabs.org/patch/281972/

 arch/arm/include/asm/arch-omap4/omap.h |    4 ++++
 board/ti/panda/panda.c                 |   16 ++++++++++++++++
 2 files changed, 20 insertions(+)
Tom Rini - Oct. 14, 2013, 8:27 p.m.
On Thu, Oct 10, 2013 at 08:54:23AM -0500, Dan Murphy wrote:

> 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>

Applied to u-boot/master, thanks!

Patch

diff --git a/arch/arm/include/asm/arch-omap4/omap.h b/arch/arm/include/asm/arch-omap4/omap.h
index 9129c0d..e35f51c 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 e838ffd..bc3c292 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;
 }