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Code Issues Releases Activity

Add wait for KFuse init to prevent wrong TSEC key

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shchmue 2019-10-22 11:15:59 -06:00
parent 8c2aa76fd0
commit 3ea82573e0
2 changed files with 103 additions and 0 deletions
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61
source/soc/kfuse.c Normal file
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/*
* Copyright (c) 2018 naehrwert
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#include "../soc/kfuse.h"
#include "../soc/clock.h"
#include "../soc/t210.h"
#pragma GCC push_options
#pragma GCC optimize ("Os")
int kfuse_read(u32 *buf)
{
int res = 0;
clock_enable_kfuse();
while (!(KFUSE(KFUSE_STATE) & KFUSE_STATE_DONE))
;
if (!(KFUSE(KFUSE_STATE) & KFUSE_STATE_CRCPASS))
goto out;
KFUSE(KFUSE_KEYADDR) = KFUSE_KEYADDR_AUTOINC;
for (int i = 0; i < KFUSE_NUM_WORDS; i++)
buf[i] = KFUSE(KFUSE_KEYS);
res = 1;
out:;
clock_disable_kfuse();
return res;
}
int kfuse_wait_ready()
{
// Wait for KFUSE to finish init and verification of data.
while (!(KFUSE(KFUSE_STATE) & KFUSE_STATE_DONE))
{
usleep(500);
}
if (!(KFUSE(KFUSE_STATE) & KFUSE_STATE_CRCPASS))
return 0;
return 1;
}
#pragma GCC pop_options

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source/soc/kfuse.h Normal file
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/*
* Copyright (c) 2018 naehrwert
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _KFUSE_H_
#define _KFUSE_H_
#include "../utils/types.h"
#define KFUSE_STATE_SOFTRESET (1 << 31)
#define KFUSE_STATE_STOP (1 << 25)
#define KFUSE_STATE_RESTART (1 << 24)
#define KFUSE_STATE_CRCPASS (1 << 17)
#define KFUSE_STATE_DONE (1 << 16)
#define KFUSE_STATE_ERRBLOCK_MASK 0x3F00
#define KFUSE_STATE_ERRBLOCK_SHIFT 8
#define KFUSE_STATE_CURBLOCK_MASK 0x3F
#define KFUSE_KEYADDR_AUTOINC (1<<16)
#define KFUSE_STATE 0x80
#define KFUSE_KEYADDR 0x88
#define KFUSE_KEYS 0x8C
#define KFUSE_NUM_WORDS 144
int kfuse_read(u32 *buf);
int kfuse_wait_ready();
#endif