ARM: OMAP5-uevm: Add USB MAC ethernet address

Set the usbethaddr based on the OMAP DIE_ID registers which should be unique for each processor. Then set this as the usb ethernet MAC address. Signed-off-by: Dan Murphy <dmurphy@ti.com>

ARM: OMAP5-uevm: Add USB MAC ethernet address
Set the usbethaddr based on the OMAP DIE_ID registers which should be unique for each processor. Then set this as the usb ethernet MAC address. Signed-off-by: Dan Murphy <dmurphy@ti.com>
Dan Murphy · Marek Vasut
1 parent 5e5cfaf997
Showing 1 changed file with 23 additions and 0 deletions Side-by-side Diff
board/ti/omap5_uevm/evm.c
@@ -19,6 +19,10 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/ehci.h>
 #include <asm/ehci-omap.h>
+
+#define DIE_ID_REG_BASE     (OMAP54XX_L4_CORE_BASE + 0x2000)
+#define DIE_ID_REG_OFFSET	0x200
+
 #endif
  
 DECLARE_GLOBAL_DATA_PTR;
  
@@ -144,8 +148,27 @@
 {
 	int ret;
 	int auxclk;
+	int reg;
+	uint8_t device_mac[6];
  
 	enable_host_clocks();
+
+	if (!getenv("usbethaddr")) {
+		reg = DIE_ID_REG_BASE + DIE_ID_REG_OFFSET;
+
+		/*
+		 * 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(reg + 0x10) & 0xff;
+		device_mac[2] = readl(reg + 0xC) & 0xff;
+		device_mac[3] = readl(reg + 0x8) & 0xff;
+		device_mac[4] = readl(reg) & 0xff;
+		device_mac[5] = (readl(reg) >> 8) & 0xff;
+
+		eth_setenv_enetaddr("usbethaddr", device_mac);
+	}
  
 	auxclk = readl((*prcm)->scrm_auxclk1);
 	/* Request auxilary clock */
...	...	@@ -19,6 +19,10 @@
19	19	#include <asm/arch/clock.h>
20	20	#include <asm/arch/ehci.h>
21	21	#include <asm/ehci-omap.h>
	22	+
	23	+#define DIE_ID_REG_BASE (OMAP54XX_L4_CORE_BASE + 0x2000)
	24	+#define DIE_ID_REG_OFFSET 0x200
	25	+
22	26	#endif
23	27
24	28	DECLARE_GLOBAL_DATA_PTR;
25	29
...	...	@@ -144,8 +148,27 @@
144	148	{
145	149	int ret;
146	150	int auxclk;
	151	+ int reg;
	152	+ uint8_t device_mac[6];
147	153
148	154	enable_host_clocks();
	155	+
	156	+ if (!getenv("usbethaddr")) {
	157	+ reg = DIE_ID_REG_BASE + DIE_ID_REG_OFFSET;
	158	+
	159	+ /*
	160	+ * create a fake MAC address from the processor ID code.
	161	+ * first byte is 0x02 to signify locally administered.
	162	+ */
	163	+ device_mac[0] = 0x02;
	164	+ device_mac[1] = readl(reg + 0x10) & 0xff;
	165	+ device_mac[2] = readl(reg + 0xC) & 0xff;
	166	+ device_mac[3] = readl(reg + 0x8) & 0xff;
	167	+ device_mac[4] = readl(reg) & 0xff;
	168	+ device_mac[5] = (readl(reg) >> 8) & 0xff;
	169	+
	170	+ eth_setenv_enetaddr("usbethaddr", device_mac);
	171	+ }
149	172
150	173	auxclk = readl((*prcm)->scrm_auxclk1);
151	174	/* Request auxilary clock */