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/* 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 */
uint32_t magic;
/* unix timestamp of production date (0=unknown) */
uint32_t production_ts;
/* hardware version */
uint32_t version;
/* re-works applied */
uint32_t reworks;
} __attribute__((packed));
int prod_info_write(uint32_t ts, uint32_t version, uint32_t reworks)
{
struct simtrace_prod_info pi = {
.magic = PRODINFO_MAGIC,
.production_ts = ts,
.version = version,
.reworks = reworks,
};
uint8_t *pi8 = (uint8_t *) π
uint32_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(uint32_t *ver, uint32_t *reworks)
{
struct simtrace_prod_info pi;
uint32_t addr = OTP_ADDR(OTP_REGION_PRODINFO);
spiflash_otp_read(addr, (uint8_t *) &pi, sizeof(pi));
if (pi.magic != PRODINFO_MAGIC)
return -1;
if (ver)
*ver = pi.version;
if (reworks)
*reworks = pi.reworks;
return 0;
}
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