From 2a51b7c1c2165ddb188c511e192b75f0aa0fbead Mon Sep 17 00:00:00 2001
From: Tian Fang <tfang@fb.com>
Date: Mon, 9 Mar 2015 22:53:57 -0700
Subject: Initial open source release of OpenBMC

---
 .../recipes-wedge/po-eeprom/files/Makefile         | 10 +++
 .../recipes-wedge/po-eeprom/files/po-eeprom.c      | 80 ++++++++++++++++++++++
 2 files changed, 90 insertions(+)
 create mode 100644 meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files/Makefile
 create mode 100644 meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files/po-eeprom.c

(limited to 'meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files')

diff --git a/meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files/Makefile b/meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files/Makefile
new file mode 100644
index 0000000..408de95
--- /dev/null
+++ b/meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files/Makefile
@@ -0,0 +1,10 @@
+# Copyright 2014-present Facebook. All Rights Reserved.
+all: po-eeprom
+
+po-eeprom: po-eeprom.o
+	$(CC) -o $@ $^ $(LDFLAGS)
+
+.PHONY: clean
+
+clean:
+	rm -rf *.o po-eeprom
diff --git a/meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files/po-eeprom.c b/meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files/po-eeprom.c
new file mode 100644
index 0000000..46debee
--- /dev/null
+++ b/meta-facebook/meta-wedge/recipes-wedge/po-eeprom/files/po-eeprom.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2014-present Facebook. All Rights Reserved.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#define SERIAL_LEN 17
+
+usage()
+{
+  fprintf(stderr, "Usage:  po-eeprom filename [filename...]\n"
+	  "\twhere filename is the location of the PowerOne EEPROM, likely\n"
+	  "\t/sys/bus/i2c/drivers/at24/7-0051/eeprom or\n"
+	  "\t/sys/bus/i2c/drivers/at24/7-0052/eeprom\n");
+  exit(2);
+}
+
+int safe_read(int fd, void *buf, size_t size, char *msg)
+{
+  if (read(fd, buf, size) != size) {
+    perror(msg);
+    exit(3);
+  }
+}
+
+int main(int argc, char **argv)
+{
+  int fd;
+  int file = 1;
+  uint8_t size;
+  uint8_t junk;
+  uint16_t crc;
+  char serial[SERIAL_LEN + 1];
+
+  if (argc < 2)
+    usage();
+
+  while (file < argc) {
+    fd = open(argv[file], O_RDONLY);
+    if (fd < 0) {
+      fprintf(stderr, "Couldn't open %s for EEPROM reading\n", argv[1]);
+      exit(1);
+    }
+
+    safe_read(fd, &size, sizeof(size), "read size");
+    safe_read(fd, &junk, sizeof(junk), "read junk");
+    /*
+     * Should probably check CRC here, PowerOne provided some code where
+     * it looks like a pretty standard CCITT CRC16.
+     */
+    safe_read(fd, &crc, sizeof(crc), "read CRC len");
+    safe_read(fd, serial, SERIAL_LEN, "read serial number");
+
+    serial[SERIAL_LEN] = 0;
+    printf("Serial number:  %s\n", serial);
+    close(fd);
+    file++;
+  }
+}
-- 
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