From e4e2bf5e4ccbe85f2fcfbb2880348228e81eb44e Mon Sep 17 00:00:00 2001
From: Nikita Kiryanov <nikita@compulab.co.il>
Date: Thu, 12 Jan 2012 03:28:09 +0000
Subject: [PATCH] cm-t35: use the new EEPROM module to read the MAC address

Switch to the new EEPROM module and fix the problem of MAC address
being read from the wrong offset due to lack of distinction between
EEPROM layouts.

Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
---
 board/cm_t35/cm_t35.c |  6 +++---
 board/cm_t35/eeprom.c | 18 ++++++++++++++++++
 board/cm_t35/eeprom.h | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 54 insertions(+), 3 deletions(-)
 create mode 100644 board/cm_t35/eeprom.h

diff --git a/board/cm_t35/cm_t35.c b/board/cm_t35/cm_t35.c
index 0d5a401..0a04994 100644
--- a/board/cm_t35/cm_t35.c
+++ b/board/cm_t35/cm_t35.c
@@ -42,6 +42,8 @@
 #include <asm/arch/sys_proto.h>
 #include <asm/mach-types.h>
 
+#include "eeprom.h"
+
 DECLARE_GLOBAL_DATA_PTR;
 
 const omap3_sysinfo sysinfo = {
@@ -383,11 +385,9 @@ static int handle_mac_address(void)
 	if (rc)
 		return 0;
 
-#ifdef CONFIG_DRIVER_OMAP34XX_I2C
-	rc = i2c_read(0x50, 0, 1, enetaddr, 6);
+	rc = cm_t3x_eeprom_read_mac_addr(enetaddr);
 	if (rc)
 		return rc;
-#endif
 
 	if (!is_valid_ether_addr(enetaddr))
 		return -1;
diff --git a/board/cm_t35/eeprom.c b/board/cm_t35/eeprom.c
index b3d332f..dfa171d 100644
--- a/board/cm_t35/eeprom.c
+++ b/board/cm_t35/eeprom.c
@@ -29,6 +29,8 @@
 #define BOARD_REV_OFFSET_LEGACY		6
 #define BOARD_REV_SIZE			4
 #define BOARD_REV_SIZE_LEGACY		2
+#define MAC_ADDR_OFFSET			4
+#define MAC_ADDR_OFFSET_LEGACY		0
 
 #define LAYOUT_INVALID	0
 #define LAYOUT_LEGACY	0xff
@@ -82,6 +84,22 @@ void get_board_serial(struct tag_serialnr *serialnr)
 }
 
 /*
+ * Routine: cm_t3x_eeprom_read_mac_addr
+ * Description: read mac address and store it in buf.
+ */
+int cm_t3x_eeprom_read_mac_addr(uchar *buf)
+{
+	uint offset;
+
+	if (eeprom_setup_layout())
+		return 0;
+
+	offset = (eeprom_layout != LAYOUT_LEGACY) ?
+			MAC_ADDR_OFFSET : MAC_ADDR_OFFSET_LEGACY;
+	return cm_t3x_eeprom_read(offset, buf, 6);
+}
+
+/*
  * Routine: get_board_rev
  * Description: read system revision
  */
diff --git a/board/cm_t35/eeprom.h b/board/cm_t35/eeprom.h
new file mode 100644
index 0000000..ec772c6
--- /dev/null
+++ b/board/cm_t35/eeprom.h
@@ -0,0 +1,33 @@
+/*
+ * (C) Copyright 2011 CompuLab, Ltd. <www.compulab.co.il>
+ *
+ * Authors: Nikita Kiryanov <nikita@compulab.co.il>
+ *	    Igor Grinberg <grinberg@compulab.co.il>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+#ifndef _EEPROM_
+#define _EEPROM_
+
+#ifdef CONFIG_DRIVER_OMAP34XX_I2C
+int cm_t3x_eeprom_read_mac_addr(uchar *buf);
+#else
+static inline int cm_t3x_eeprom_read_mac_addr(uchar *buf)
+{
+	return 1;
+}
+#endif
+
+#endif