mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-22 15:38:11 +00:00
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (C) 2019 Pavol Rusnak <stick@satoshilabs.com>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "otp.h"
|
|
#include <libopencm3/stm32/flash.h>
|
|
|
|
#define FLASH_OTP_BASE 0x1FFF7800U
|
|
#define FLASH_OTP_LOCK_BASE 0x1FFF7A00U
|
|
|
|
bool flash_otp_is_locked(uint8_t block) {
|
|
return 0x00 == *(volatile uint8_t *)(FLASH_OTP_LOCK_BASE + block);
|
|
}
|
|
|
|
bool flash_otp_lock(uint8_t block) {
|
|
if (block >= FLASH_OTP_NUM_BLOCKS) {
|
|
return false;
|
|
}
|
|
flash_unlock();
|
|
flash_program_byte(FLASH_OTP_LOCK_BASE + block, 0x00);
|
|
flash_lock();
|
|
return true;
|
|
}
|
|
|
|
bool flash_otp_read(uint8_t block, uint8_t offset, uint8_t *data,
|
|
uint8_t datalen) {
|
|
if (block >= FLASH_OTP_NUM_BLOCKS ||
|
|
offset + datalen > FLASH_OTP_BLOCK_SIZE) {
|
|
return false;
|
|
}
|
|
for (uint8_t i = 0; i < datalen; i++) {
|
|
data[i] = *(volatile uint8_t *)(FLASH_OTP_BASE +
|
|
block * FLASH_OTP_BLOCK_SIZE + offset + i);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool flash_otp_write(uint8_t block, uint8_t offset, const uint8_t *data,
|
|
uint8_t datalen) {
|
|
if (block >= FLASH_OTP_NUM_BLOCKS ||
|
|
offset + datalen > FLASH_OTP_BLOCK_SIZE) {
|
|
return false;
|
|
}
|
|
flash_unlock();
|
|
for (uint8_t i = 0; i < datalen; i++) {
|
|
uint32_t address =
|
|
FLASH_OTP_BASE + block * FLASH_OTP_BLOCK_SIZE + offset + i;
|
|
flash_program_byte(address, data[i]);
|
|
}
|
|
flash_lock();
|
|
return true;
|
|
}
|