1 /*
2  * SPDX-FileCopyrightText: 2017-2022 Espressif Systems (Shanghai) CO LTD
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  */
6 
7 #include "esp_efuse.h"
8 #include "esp_efuse_utility.h"
9 #include "esp_efuse_table.h"
10 #include "stdlib.h"
11 #include "esp_types.h"
12 #include "assert.h"
13 #include "esp_err.h"
14 #include "esp_log.h"
15 #include "soc/efuse_periph.h"
16 #include "sys/param.h"
17 
18 static __attribute__((unused)) const char *TAG = "efuse";
19 
20 // Contains functions that provide access to efuse fields which are often used in IDF.
21 
22 // Returns chip package from efuse
esp_efuse_get_pkg_ver(void)23 uint32_t esp_efuse_get_pkg_ver(void)
24 {
25     uint32_t pkg_ver = 0;
26     esp_efuse_read_field_blob(ESP_EFUSE_PKG_VERSION, &pkg_ver, 4);
27     return pkg_ver;
28 }
29 
esp_efuse_disable_rom_download_mode(void)30 esp_err_t esp_efuse_disable_rom_download_mode(void)
31 {
32     return esp_efuse_write_field_bit(ESP_EFUSE_DIS_DOWNLOAD_MODE);
33 }
34 
esp_efuse_set_rom_log_scheme(esp_efuse_rom_log_scheme_t log_scheme)35 esp_err_t esp_efuse_set_rom_log_scheme(esp_efuse_rom_log_scheme_t log_scheme)
36 {
37     int cur_log_scheme = 0;
38     esp_efuse_read_field_blob(ESP_EFUSE_UART_PRINT_CONTROL, &cur_log_scheme, 2);
39     if (!cur_log_scheme) { // not burned yet
40         return esp_efuse_write_field_blob(ESP_EFUSE_UART_PRINT_CONTROL, &log_scheme, 2);
41     } else {
42         return ESP_ERR_INVALID_STATE;
43     }
44 }
45 
esp_efuse_enable_rom_secure_download_mode(void)46 esp_err_t esp_efuse_enable_rom_secure_download_mode(void)
47 {
48     if (esp_efuse_read_field_bit(ESP_EFUSE_DIS_DOWNLOAD_MODE)) {
49         return ESP_ERR_INVALID_STATE;
50     }
51     return esp_efuse_write_field_bit(ESP_EFUSE_ENABLE_SECURITY_DOWNLOAD);
52 }
53