simtrace: Add OTP data containing production data

2 files changed, 112 insertions, 0 deletions

diff --git a/firmware/src/simtrace/prod_info.c b/firmware/src/simtrace/prod_info.c
new file mode 100644
index 0000000..87ef6e2
--- /dev/null
+++ b/firmware/src/simtrace/prod_info.c
@@ -0,0 +1,100 @@
+/* Maintainance of production information in SPI flash
+ * (C) 2013 by Harald Welte <laforge@gnumonks.org>
+ *
+ *  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
+ *
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <AT91SAM7.h>
+#include <lib_AT91SAM7.h>
+#include <openpcd.h>
+
+#include <os/dbgu.h>
+
+#include "spi_flash.h"
+#include "prod_info.h"
+
+#include "../simtrace.h"
+
+#define OTP_REGION_PRODINFO	1
+
+#define PRODINFO_MAGIC	0x51075ACE
+
+struct simtrace_prod_info
+{
+	/* magic value */
+	u_int32_t magic;
+	/* unix timestamp of production date (0=unknown) */
+	u_int32_t production_ts;
+	/* hardware version */
+	u_int32_t version;
+	/* re-works applied */
+	u_int32_t reworks;
+} __attribute__((packed));
+
+
+int prod_info_write(u_int32_t ts, u_int32_t version, u_int32_t reworks)
+{
+	struct simtrace_prod_info pi = {
+		.magic = PRODINFO_MAGIC,
+		.production_ts = ts,
+		.version = version,
+		.reworks = reworks,
+	};
+	u_int8_t *pi8 = (u_int8_t *) &pi;
+	u_int32_t addr = OTP_ADDR(OTP_REGION_PRODINFO);
+	unsigned int rc;
+	int i;
+
+	spiflash_write_protect(0);
+
+	for (i = 0; i < sizeof(pi); i++) {
+		DEBUGPCR("0x%02x writing 0x%0x", addr+i, pi8[i]);
+		spiflash_write_enable(1);
+		rc = spiflash_otp_write(addr+i, pi8[i]);
+		if (rc < 0)
+			break;
+
+		do { } while (spiflash_read_status() & 1);
+	}
+
+	spiflash_otp_set_lock(OTP_REGION_PRODINFO);
+
+	spiflash_write_protect(1);
+
+	return rc;
+}
+
+int prod_info_get(u_int32_t *ver, u_int32_t *reworks)
+{
+	struct simtrace_prod_info pi;
+	u_int32_t addr = OTP_ADDR(OTP_REGION_PRODINFO);
+
+	spiflash_otp_read(addr, (u_int8_t *) &pi, sizeof(pi));
+
+	if (pi.magic != PRODINFO_MAGIC)
+		return -1;
+
+	if (ver)
+		*ver = pi.version;
+
+	if (reworks)
+		*reworks = pi.reworks;
+
+	return 0;
+}
diff --git a/firmware/src/simtrace/prod_info.h b/firmware/src/simtrace/prod_info.h
new file mode 100644
index 0000000..7a12421
--- /dev/null
+++ b/firmware/src/simtrace/prod_info.h
@@ -0,0 +1,12 @@
+#ifndef _PROD_INFO_H
+#define _PROD_INFO_H
+
+#define SIMTRACE_VER(a, b, c)	(((a & 0xff) << 16) |	\
+				 ((b & 0xff) << 8) |	\
+				 ((c & 0xff) << 0))
+
+
+int prod_info_write(u_int32_t ts, u_int32_t version, u_int32_t reworks);
+int prod_info_get(u_int32_t *ver, u_int32_t *reworks);
+
+#endif