1 files changed, 130 insertions, 0 deletions
diff --git a/board/compulab/cm_t35/eeprom.c b/board/compulab/cm_t35/eeprom.c
new file mode 100644
index 000000000..b0af103cd
--- /dev/null
+++ b/board/compulab/cm_t35/eeprom.c
@@ -0,0 +1,130 @@
+/*
+ * (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.
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+#define EEPROM_LAYOUT_VER_OFFSET	44
+#define BOARD_SERIAL_OFFSET		20
+#define BOARD_SERIAL_OFFSET_LEGACY	8
+#define BOARD_REV_OFFSET		0
+#define BOARD_REV_OFFSET_LEGACY		6
+#define BOARD_REV_SIZE			2
+#define MAC_ADDR_OFFSET			4
+#define MAC_ADDR_OFFSET_LEGACY		0
+
+#define LAYOUT_INVALID	0
+#define LAYOUT_LEGACY	0xff
+
+static int eeprom_layout; /* Implicitly LAYOUT_INVALID */
+
+static int cm_t3x_eeprom_read(uint offset, uchar *buf, int len)
+{
+	return i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
+			CONFIG_SYS_I2C_EEPROM_ADDR_LEN, buf, len);
+}
+
+static int eeprom_setup_layout(void)
+{
+	int res;
+
+	if (eeprom_layout != LAYOUT_INVALID)
+		return 0;
+
+	res = cm_t3x_eeprom_read(EEPROM_LAYOUT_VER_OFFSET,
+						(uchar *)&eeprom_layout, 1);
+	if (res) {
+		eeprom_layout = LAYOUT_INVALID;
+		return res;
+	}
+
+	if (eeprom_layout == 0 || eeprom_layout >= 0x20)
+		eeprom_layout = LAYOUT_LEGACY;
+
+	return 0;
+}
+
+void get_board_serial(struct tag_serialnr *serialnr)
+{
+	u32 serial[2];
+	uint offset;
+
+	memset(serialnr, 0, sizeof(*serialnr));
+	if (eeprom_setup_layout())
+		return;
+
+	offset = (eeprom_layout != LAYOUT_LEGACY) ?
+			BOARD_SERIAL_OFFSET : BOARD_SERIAL_OFFSET_LEGACY;
+	if (cm_t3x_eeprom_read(offset, (uchar *)serial, 8))
+		return;
+
+	if (serial[0] != 0xffffffff && serial[1] != 0xffffffff) {
+		serialnr->low = serial[0];
+		serialnr->high = serial[1];
+	}
+}
+
+/*
+ * 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: cm_t3x_eeprom_get_board_rev
+ * Description: read system revision from eeprom
+ */
+u32 cm_t3x_eeprom_get_board_rev(void)
+{
+	u32 rev = 0;
+	char str[5]; /* Legacy representation can contain at most 4 digits */
+	uint offset = BOARD_REV_OFFSET_LEGACY;
+
+	if (eeprom_setup_layout())
+		return 0;
+
+	if (eeprom_layout != LAYOUT_LEGACY)
+		offset = BOARD_REV_OFFSET;
+
+	if (cm_t3x_eeprom_read(offset, (uchar *)&rev, BOARD_REV_SIZE))
+		return 0;
+
+	/*
+	 * Convert legacy syntactic representation to semantic
+	 * representation. i.e. for rev 1.00: 0x100 --> 0x64
+	 */
+	if (eeprom_layout == LAYOUT_LEGACY) {
+		sprintf(str, "%x", rev);
+		rev = simple_strtoul(str, NULL, 10);
+	}
+
+	return rev;
+};