mirror of
https://github.com/espressif/esp-idf.git
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97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*
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* SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "esp_efuse.h"
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#include "esp_efuse_utility.h"
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#include "esp_efuse_table.h"
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#include "stdlib.h"
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#include "esp_types.h"
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#include "assert.h"
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#include "hal/efuse_ll.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "soc/efuse_periph.h"
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#include "sys/param.h"
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static __attribute__((unused)) const char *TAG = "efuse";
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// Contains functions that provide access to efuse fields which are often used in IDF.
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// Returns chip package from efuse
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uint32_t esp_efuse_get_pkg_ver(void)
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{
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uint32_t pkg_ver = 0;
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esp_efuse_read_field_blob(ESP_EFUSE_PKG_VERSION, &pkg_ver, ESP_EFUSE_PKG_VERSION[0]->bit_count);
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return pkg_ver;
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}
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esp_err_t esp_efuse_set_rom_log_scheme(esp_efuse_rom_log_scheme_t log_scheme)
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{
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int cur_log_scheme = 0;
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esp_efuse_read_field_blob(ESP_EFUSE_UART_PRINT_CONTROL, &cur_log_scheme, 2);
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if (!cur_log_scheme) { // not burned yet
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return esp_efuse_write_field_blob(ESP_EFUSE_UART_PRINT_CONTROL, &log_scheme, 2);
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} else {
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return ESP_ERR_INVALID_STATE;
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}
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}
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esp_err_t esp_efuse_disable_rom_download_mode(void)
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{
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return esp_efuse_write_field_bit(ESP_EFUSE_DIS_DOWNLOAD_MODE);
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}
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esp_err_t esp_efuse_enable_rom_secure_download_mode(void)
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{
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if (esp_efuse_read_field_bit(ESP_EFUSE_DIS_DOWNLOAD_MODE)) {
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return ESP_ERR_INVALID_STATE;
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}
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return esp_efuse_write_field_bit(ESP_EFUSE_ENABLE_SECURITY_DOWNLOAD);
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}
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#if SOC_ECDSA_P192_CURVE_DEFAULT_DISABLED
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bool esp_efuse_is_ecdsa_p192_curve_supported(void)
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{
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uint32_t current_curve = efuse_ll_get_ecdsa_curve_mode();
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return (current_curve == ESP_EFUSE_ECDSA_CURVE_MODE_ALLOW_BOTH_P192_P256_BIT || current_curve == ESP_EFUSE_ECDSA_CURVE_MODE_ALLOW_ONLY_P192_BIT);
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}
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esp_err_t esp_efuse_enable_ecdsa_p192_curve_mode(void)
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{
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esp_err_t err;
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uint8_t current_curve, next_curve;
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err = esp_efuse_read_field_blob(ESP_EFUSE_ECDSA_CURVE_MODE, ¤t_curve, ESP_EFUSE_ECDSA_CURVE_MODE[0]->bit_count);
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if (err != ESP_OK) {
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ESP_EARLY_LOGE(TAG, "Failed to read ECDSA curve mode");
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return err;
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}
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// Check if already in desired state
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if (current_curve == ESP_EFUSE_ECDSA_CURVE_MODE_ALLOW_BOTH_P192_P256_BIT || current_curve == ESP_EFUSE_ECDSA_CURVE_MODE_ALLOW_ONLY_P192_BIT) {
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ESP_EARLY_LOGD(TAG, "ECDSA P-192 curve mode is already enabled");
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return ESP_OK;
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}
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// Check if write is disabled or already locked to P256
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if (esp_efuse_read_field_bit(ESP_EFUSE_WR_DIS_ECDSA_CURVE_MODE) || current_curve == ESP_EFUSE_ECDSA_CURVE_MODE_ALLOW_ONLY_P256_BIT_LOCKED) {
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ESP_EARLY_LOGE(TAG, "ECDSA curve mode is locked, cannot enable P-192 curve");
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return ESP_FAIL;
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}
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// Attempt to write new curve mode
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next_curve = ESP_EFUSE_ECDSA_CURVE_MODE_ALLOW_BOTH_P192_P256_BIT;
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err = esp_efuse_write_field_blob(ESP_EFUSE_ECDSA_CURVE_MODE, &next_curve, ESP_EFUSE_ECDSA_CURVE_MODE[0]->bit_count);
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if (err != ESP_OK) {
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ESP_EARLY_LOGE(TAG, "Failed to enable ECDSA P-192 curve %d", err);
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return err;
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}
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return ESP_OK;
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}
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#endif /* SOC_ECDSA_P192_CURVE_DEFAULT_DISABLED */
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