mpc8323erdb: fix EEPROM page size and get MAC from EEPROM

This patch fixes eeprom page size so that you can now write more than
64 bytes at a time.

It also makes the board take MAC addresses, if found, from EEPROM.

User should place up to 4 addresses at offset 0x7f00, for
eth{,1,2,3}addr.  Any unused addresses should be zero.  This group of
four six-byte values should have it's CRC at the end.  crc32 and
eeprom commands can be used to accomplish this.

If CRC fails, MAC addresses come from the environment.  If CRC
succeeds, the environment is overwritten at startup.

Signed-off-by: Michael Barkowski <michael.barkowski@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/board/freescale/mpc8323erdb/mpc8323erdb.c b/board/freescale/mpc8323erdb/mpc8323erdb.c
index 88d5e8fb40..afc0eee3b7 100644
--- a/board/freescale/mpc8323erdb/mpc8323erdb.c
+++ b/board/freescale/mpc8323erdb/mpc8323erdb.c
@@ -185,3 +185,37 @@ void ft_board_setup(void *blob, bd_t *bd)
 #endif
 }
 #endif
+
+#if defined(CFG_I2C_MAC_OFFSET)
+int mac_read_from_eeprom(void)
+{
+	uchar buf[28];
+	char str[18];
+	int i = 0;
+	unsigned int crc = 0;
+	unsigned char enetvar[32];
+
+	/* Read MAC addresses from EEPROM */
+	if (eeprom_read(CFG_I2C_EEPROM_ADDR, CFG_I2C_MAC_OFFSET, buf, 28)) {
+		printf("\nEEPROM @ 0x%02x read FAILED!!!\n",
+		       CFG_I2C_EEPROM_ADDR);
+	} else {
+		if (crc32(crc, buf, 24) == *(unsigned int *)&buf[24]) {
+			printf("Reading MAC from EEPROM\n");
+			for (i = 0; i < 4; i++) {
+				if (memcmp(&buf[i * 6], "\0\0\0\0\0\0", 6)) {
+					sprintf(str,
+						"%02X:%02X:%02X:%02X:%02X:%02X",
+						buf[i * 6], buf[i * 6 + 1],
+						buf[i * 6 + 2], buf[i * 6 + 3],
+						buf[i * 6 + 4], buf[i * 6 + 5]);
+					sprintf((char *)enetvar,
+						i ? "eth%daddr" : "ethaddr", i);
+					setenv((char *)enetvar, str);
+				}
+			}
+		}
+	}
+	return 0;
+}
+#endif				/* CONFIG_I2C_MAC_OFFSET */