From c7db9a3805fbdf4187d9309cb2aa93e45828419a Mon Sep 17 00:00:00 2001
From: Wolfgang Denk <wd@pollux.denx.de>
Date: Fri, 19 Aug 2005 00:53:02 +0200
Subject: [PATCH] Initialize serial# and ethaddr from manufacturer data in
EEPROM on CMC-PU2 Patch by Martin Krause, 08 Jun 2005
---
CHANGELOG | 3 +
board/cmc_pu2/Makefile | 2 +-
board/cmc_pu2/load_sernum_ethaddr.c | 122 ++++++++++++++++++++++++++++
lib_arm/board.c | 4 +
4 files changed, 130 insertions(+), 1 deletion(-)
create mode 100644 board/cmc_pu2/load_sernum_ethaddr.c
diff --git a/CHANGELOG b/CHANGELOG
index bed0aa0d95..2f83389e4e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,9 @@
Changes for U-Boot 1.1.4:
======================================================================
+* Initialize serial# and ethaddr from manufacturer data in EEPROM on CMC-PU2
+ Patch by Martin Krause, 08 Jun 2005
+
* Add new board specific commands for TQM5200/STK52XX
- Sound commands (beep, wav, sound)
- Test commands (led, can, backlight, rs232)
diff --git a/board/cmc_pu2/Makefile b/board/cmc_pu2/Makefile
index ba433d5bf2..7703a4a498 100644
--- a/board/cmc_pu2/Makefile
+++ b/board/cmc_pu2/Makefile
@@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk
LIB = lib$(BOARD).a
-OBJS := cmc_pu2.o at45.o dm9161.o flash.o
+OBJS := cmc_pu2.o at45.o dm9161.o flash.o load_sernum_ethaddr.o
$(LIB): $(OBJS) $(SOBJS)
$(AR) crv $@ $(OBJS) $(SOBJS)
diff --git a/board/cmc_pu2/load_sernum_ethaddr.c b/board/cmc_pu2/load_sernum_ethaddr.c
new file mode 100644
index 0000000000..94aa30df96
--- /dev/null
+++ b/board/cmc_pu2/load_sernum_ethaddr.c
@@ -0,0 +1,122 @@
+/*
+ * (C) Copyright 2000, 2001, 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2005
+ * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+
+#define I2C_CHIP 0x50 /* I2C bus address of onboard EEPROM */
+#define I2C_ALEN 1 /* length of EEPROM addresses in bytes */
+#define I2C_OFFSET 0x0 /* start address of manufacturere data block
+ * in EEPROM */
+
+/* 64 Byte manufacturer data block in EEPROM */
+struct manufacturer_data {
+ unsigned int serial_number; /* serial number (0...999999) */
+ unsigned short hardware; /* hardware version (e.g. V1.02) */
+ unsigned short manuf_date; /* manufacture date (e.g. 25/02) */
+ unsigned char name[20]; /* device name (in CHIP.INI) */
+ unsigned char macadr[6]; /* MAC address */
+ signed char a_kal[4]; /* calibration value for U */
+ signed char i_kal[4]; /* calibration value for I */
+ unsigned char reserve[18]; /* reserved */
+ unsigned short save_nr; /* save count */
+ unsigned short chksum; /* checksum */
+};
+
+
+int i2c_read (unsigned char chip, unsigned int addr, int alen,
+ unsigned char *buffer, int len);
+
+/*-----------------------------------------------------------------------
+ * Process manufacturer data block in EEPROM:
+ *
+ * If we boot on a system fresh from factory, check if the manufacturer data
+ * in the EEPROM is valid and save some information it contains.
+ *
+ * CMC manufacturer data is defined as follows:
+ *
+ * - located in the onboard EEPROM
+ * - starts at offset 0x0
+ * - size 0x00000040
+ *
+ * Internal structure: see struct definition
+ */
+
+void load_sernum_ethaddr (void)
+{
+ struct manufacturer_data data;
+ unsigned char serial [9];
+ unsigned char ethaddr[18];
+ unsigned short chksum;
+ unsigned char *p;
+ unsigned short i, is, id;
+
+#if !defined(CONFIG_HARD_I2C) && !defined(CONFIG_SOFT_I2C)
+#error you must define some I2C support (CONFIG_HARD_I2C or CONFIG_SOFT_I2C)
+#endif
+ if (i2c_read(I2C_CHIP, I2C_OFFSET, I2C_ALEN, (unsigned char *)&data,
+ sizeof(data)) != 0) {
+ puts ("Error reading manufacturer data from EEPROM\n");
+ return;
+ }
+
+ /* check if manufacturer data block is valid */
+ p = (unsigned char *)&data;
+ chksum = 0;
+ for (i = 0; i < (sizeof(data) - sizeof(data.chksum)); i++)
+ chksum += *p++;
+
+ debug ("checksum of manufacturer data block: %#.4x\n", chksum);
+
+ if (chksum != data.chksum) {
+ puts ("Error: manufacturer data block has invalid checksum\n");
+ return;
+ }
+
+ /* copy MAC address */
+ is = 0;
+ id = 0;
+ for (i = 0; i < 6; i++) {
+ sprintf (ðaddr[id], "%02x", data.macadr[is++]);
+ id += 2;
+ if (is < 6)
+ ethaddr[id++] = ':';
+ }
+ ethaddr[id] = '\0'; /* just to be sure */
+
+ /* copy serial number */
+ sprintf (serial, "%d", data.serial_number);
+
+ /* set serial# and ethaddr if not yet defined */
+ if (getenv("serial#") == NULL) {
+ setenv ("serial#", serial);
+ }
+
+ if (getenv("ethaddr") == NULL) {
+ setenv ("ethaddr", ethaddr);
+ }
+}
diff --git a/lib_arm/board.c b/lib_arm/board.c
index ada8cc8879..a3588d693e 100644
--- a/lib_arm/board.c
+++ b/lib_arm/board.c
@@ -305,6 +305,10 @@ void start_armboot (void)
devices_init (); /* get the devices list going. */
+#ifdef CONFIG_CMC_PU2
+ load_sernum_ethaddr ();
+#endif /* CONFIG_CMC_PU2 */
+
jumptable_init ();
console_init_r (); /* fully init console as a device */
--
2.39.5