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 "bootloader_random.h"
17 #include "sys/param.h"
18 
19 static __attribute__((unused)) const char *TAG = "efuse";
20 
21 // Contains functions that provide access to efuse fields which are often used in IDF.
22 
23 // Returns chip version from efuse
esp_efuse_get_chip_ver(void)24 uint8_t esp_efuse_get_chip_ver(void)
25 {
26     // should return the same value as bootloader_common_get_chip_revision()
27     uint32_t chip_ver = 0;
28     esp_efuse_read_field_blob(ESP_EFUSE_WAFER_VERSION, &chip_ver, ESP_EFUSE_WAFER_VERSION[0]->bit_count);
29     return chip_ver;
30 }
31 
32 // Returns chip package from efuse
esp_efuse_get_pkg_ver(void)33 uint32_t esp_efuse_get_pkg_ver(void)
34 {
35     uint32_t pkg_ver = 0;
36     esp_efuse_read_field_blob(ESP_EFUSE_PKG_VERSION, &pkg_ver, 4);
37     return pkg_ver;
38 }
39 
esp_efuse_disable_rom_download_mode(void)40 esp_err_t esp_efuse_disable_rom_download_mode(void)
41 {
42     return esp_efuse_write_field_bit(ESP_EFUSE_DIS_DOWNLOAD_MODE);
43 }
44 
esp_efuse_set_rom_log_scheme(esp_efuse_rom_log_scheme_t log_scheme)45 esp_err_t esp_efuse_set_rom_log_scheme(esp_efuse_rom_log_scheme_t log_scheme)
46 {
47     int cur_log_scheme = 0;
48     esp_efuse_read_field_blob(ESP_EFUSE_UART_PRINT_CONTROL, &cur_log_scheme, 2);
49     if (!cur_log_scheme) { // not burned yet
50         return esp_efuse_write_field_blob(ESP_EFUSE_UART_PRINT_CONTROL, &log_scheme, 2);
51     } else {
52         return ESP_ERR_INVALID_STATE;
53     }
54 }
55 
esp_efuse_enable_rom_secure_download_mode(void)56 esp_err_t esp_efuse_enable_rom_secure_download_mode(void)
57 {
58     if (esp_efuse_read_field_bit(ESP_EFUSE_DIS_DOWNLOAD_MODE)) {
59         return ESP_ERR_INVALID_STATE;
60     }
61     return esp_efuse_write_field_bit(ESP_EFUSE_ENABLE_SECURITY_DOWNLOAD);
62 }
63