simtrace: Add OTP data containing production data
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/* Maintainance of production information in SPI flash
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* (C) 2013 by Harald Welte <laforge@gnumonks.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <AT91SAM7.h>
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#include <lib_AT91SAM7.h>
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#include <openpcd.h>
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#include <os/dbgu.h>
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#include "spi_flash.h"
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#include "prod_info.h"
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#include "../simtrace.h"
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#define OTP_REGION_PRODINFO 1
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#define PRODINFO_MAGIC 0x51075ACE
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struct simtrace_prod_info
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{
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/* magic value */
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u_int32_t magic;
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/* unix timestamp of production date (0=unknown) */
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u_int32_t production_ts;
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/* hardware version */
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u_int32_t version;
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/* re-works applied */
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u_int32_t reworks;
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} __attribute__((packed));
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int prod_info_write(u_int32_t ts, u_int32_t version, u_int32_t reworks)
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{
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struct simtrace_prod_info pi = {
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.magic = PRODINFO_MAGIC,
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.production_ts = ts,
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.version = version,
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.reworks = reworks,
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};
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u_int8_t *pi8 = (u_int8_t *) π
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u_int32_t addr = OTP_ADDR(OTP_REGION_PRODINFO);
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unsigned int rc;
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int i;
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spiflash_write_protect(0);
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for (i = 0; i < sizeof(pi); i++) {
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DEBUGPCR("0x%02x writing 0x%0x", addr+i, pi8[i]);
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spiflash_write_enable(1);
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rc = spiflash_otp_write(addr+i, pi8[i]);
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if (rc < 0)
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break;
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do { } while (spiflash_read_status() & 1);
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}
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spiflash_otp_set_lock(OTP_REGION_PRODINFO);
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spiflash_write_protect(1);
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return rc;
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}
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int prod_info_get(u_int32_t *ver, u_int32_t *reworks)
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{
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struct simtrace_prod_info pi;
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u_int32_t addr = OTP_ADDR(OTP_REGION_PRODINFO);
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spiflash_otp_read(addr, (u_int8_t *) &pi, sizeof(pi));
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if (pi.magic != PRODINFO_MAGIC)
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return -1;
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if (ver)
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*ver = pi.version;
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if (reworks)
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*reworks = pi.reworks;
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return 0;
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}
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@ -0,0 +1,12 @@
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#ifndef _PROD_INFO_H
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#define _PROD_INFO_H
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#define SIMTRACE_VER(a, b, c) (((a & 0xff) << 16) | \
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((b & 0xff) << 8) | \
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((c & 0xff) << 0))
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int prod_info_write(u_int32_t ts, u_int32_t version, u_int32_t reworks);
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int prod_info_get(u_int32_t *ver, u_int32_t *reworks);
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#endif
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