mirror of
https://github.com/espressif/esp-idf.git
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284 lines
8.9 KiB
C
284 lines
8.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2022-2023 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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#ifndef _ROM_EFUSE_H_
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#define _ROM_EFUSE_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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/** \defgroup efuse_APIs efuse APIs
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* @brief ESP32 efuse read/write APIs
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* @attention
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*
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*/
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/** @addtogroup efuse_APIs
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* @{
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*/
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typedef enum {
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ETS_EFUSE_KEY_PURPOSE_USER = 0,
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ETS_EFUSE_KEY_PURPOSE_RESERVED = 1,
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ETS_EFUSE_KEY_PURPOSE_XTS_AES_128_KEY = 4,
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ETS_EFUSE_KEY_PURPOSE_HMAC_DOWN_ALL = 5,
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ETS_EFUSE_KEY_PURPOSE_HMAC_DOWN_JTAG = 6,
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ETS_EFUSE_KEY_PURPOSE_HMAC_DOWN_DIGITAL_SIGNATURE = 7,
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ETS_EFUSE_KEY_PURPOSE_HMAC_UP = 8,
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ETS_EFUSE_KEY_PURPOSE_SECURE_BOOT_DIGEST0 = 9,
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ETS_EFUSE_KEY_PURPOSE_SECURE_BOOT_DIGEST1 = 10,
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ETS_EFUSE_KEY_PURPOSE_SECURE_BOOT_DIGEST2 = 11,
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ETS_EFUSE_KEY_PURPOSE_MAX,
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} ets_efuse_purpose_t;
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typedef enum {
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ETS_EFUSE_BLOCK0 = 0,
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ETS_EFUSE_MAC_SPI_SYS_0 = 1,
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ETS_EFUSE_BLOCK_SYS_DATA = 2,
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ETS_EFUSE_BLOCK_USR_DATA = 3,
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ETS_EFUSE_BLOCK_KEY0 = 4,
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ETS_EFUSE_BLOCK_KEY1 = 5,
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ETS_EFUSE_BLOCK_KEY2 = 6,
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ETS_EFUSE_BLOCK_KEY3 = 7,
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ETS_EFUSE_BLOCK_KEY4 = 8,
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ETS_EFUSE_BLOCK_KEY5 = 9,
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ETS_EFUSE_BLOCK_KEY6 = 10,
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ETS_EFUSE_BLOCK_MAX,
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} ets_efuse_block_t;
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/**
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* @brief Efuse read operation: copies data from physical efuses to efuse read registers.
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*
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* @param null
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*
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* @return : 0 if success, others if apb clock is not accepted
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*/
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int ets_efuse_read(void);
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/**
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* @brief Efuse write operation: Copies data from efuse write registers to efuse. Operates on a single block of efuses at a time.
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*
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* @note This function does not update read efuses, call ets_efuse_read() once all programming is complete.
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*
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* @return : 0 if success, others if apb clock is not accepted
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*/
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int ets_efuse_program(ets_efuse_block_t block);
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/**
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* @brief Set all Efuse program registers to zero.
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*
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* Call this before writing new data to the program registers.
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*/
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void ets_efuse_clear_program_registers(void);
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/**
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* @brief Program a block of key data to an efuse block
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*
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* @param key_block Block to read purpose for. Must be in range ETS_EFUSE_BLOCK_KEY0 to ETS_EFUSE_BLOCK_KEY6. Key block must be unused (@ref ets_efuse_key_block_unused).
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* @param purpose Purpose to set for this key. Purpose must be already unset.
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* @param data Pointer to data to write.
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* @param data_len Length of data to write.
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*
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* @note This function also calls ets_efuse_program() for the specified block, and for block 0 (setting the purpose)
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*/
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int ets_efuse_write_key(ets_efuse_block_t key_block, ets_efuse_purpose_t purpose, const void *data, size_t data_len);
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/* @brief Return the address of a particular efuse block's first read register
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*
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* @param block Index of efuse block to look up
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*
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* @return 0 if block is invalid, otherwise a numeric read register address
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* of the first word in the block.
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*/
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uint32_t ets_efuse_get_read_register_address(ets_efuse_block_t block);
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/**
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* @brief Return the current purpose set for an efuse key block
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*
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* @param key_block Block to read purpose for. Must be in range ETS_EFUSE_BLOCK_KEY0 to ETS_EFUSE_BLOCK_KEY6.
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*/
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ets_efuse_purpose_t ets_efuse_get_key_purpose(ets_efuse_block_t key_block);
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/**
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* @brief Find a key block with the particular purpose set
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*
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* @param purpose Purpose to search for.
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* @param[out] key_block Pointer which will be set to the key block if found. Can be NULL, if only need to test the key block exists.
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* @return true if found, false if not found. If false, value at key_block pointer is unchanged.
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*/
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bool ets_efuse_find_purpose(ets_efuse_purpose_t purpose, ets_efuse_block_t *key_block);
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/**
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* Return true if the key block is unused, false otherwise.
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*
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* An unused key block is all zero content, not read or write protected,
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* and has purpose 0 (ETS_EFUSE_KEY_PURPOSE_USER)
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*
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* @param key_block key block to check.
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*
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* @return true if key block is unused, false if key block or used
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* or the specified block index is not a key block.
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*/
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bool ets_efuse_key_block_unused(ets_efuse_block_t key_block);
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/**
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* @brief Search for an unused key block and return the first one found.
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*
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* See @ref ets_efuse_key_block_unused for a description of an unused key block.
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*
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* @return First unused key block, or ETS_EFUSE_BLOCK_MAX if no unused key block is found.
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*/
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ets_efuse_block_t ets_efuse_find_unused_key_block(void);
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/**
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* @brief Return the number of unused efuse key blocks (0-6)
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*/
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unsigned ets_efuse_count_unused_key_blocks(void);
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/**
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* @brief Calculate Reed-Solomon Encoding values for a block of efuse data.
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*
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* @param data Pointer to data buffer (length 32 bytes)
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* @param rs_values Pointer to write encoded data to (length 12 bytes)
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*/
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void ets_efuse_rs_calculate(const void *data, void *rs_values);
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/**
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* @brief Read if download mode disabled from Efuse
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*
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* @return
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* - true for efuse disable download mode.
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* - false for efuse doesn't disable download mode.
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*/
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bool ets_efuse_download_modes_disabled(void);
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/**
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* @brief Read if uart print control value from Efuse
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*
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* @return
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* - 0 for uart force print.
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* - 1 for uart print when GPIO8 is low when digital reset.
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* 2 for uart print when GPIO8 is high when digital reset.
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* 3 for uart force slient
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*/
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uint32_t ets_efuse_get_uart_print_control(void);
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/**
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* @brief Read if usb download mode disabled from Efuse
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*
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* (Also returns true if security download mode is enabled, as this mode
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* disables USB download.)
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*
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* @return
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* - true for efuse disable usb download mode.
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* - false for efuse doesn't disable usb download mode.
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*/
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bool ets_efuse_usb_download_mode_disabled(void);
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/**
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* @brief Read if security download modes enabled from Efuse
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*
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* @return
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* - true for efuse enable security download mode.
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* - false for efuse doesn't enable security download mode.
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*/
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bool ets_efuse_security_download_modes_enabled(void);
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/**
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* @brief Return true if secure boot is enabled in EFuse
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*/
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bool ets_efuse_secure_boot_enabled(void);
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/**
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* @brief Return true if secure boot aggressive revoke is enabled in EFuse
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*/
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bool ets_efuse_secure_boot_aggressive_revoke_enabled(void);
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/**
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* @brief Return true if cache encryption (flash, etc) is enabled from boot via EFuse
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*/
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bool ets_efuse_cache_encryption_enabled(void);
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/**
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* @brief Return true if EFuse indicates to send a flash resume command.
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*/
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bool ets_efuse_force_send_resume(void);
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/**
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* @brief return the time in us ROM boot need wait flash to power on from Efuse
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*
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* @return
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* - uint32_t the time in us.
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*/
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uint32_t ets_efuse_get_flash_delay_us(void);
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#define EFUSE_SPICONFIG_SPI_DEFAULTS 0
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#define EFUSE_SPICONFIG_HSPI_DEFAULTS 1
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#define EFUSE_SPICONFIG_RET_SPICLK_MASK 0x3f
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#define EFUSE_SPICONFIG_RET_SPICLK_SHIFT 0
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#define EFUSE_SPICONFIG_RET_SPICLK(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPICLK_SHIFT) & EFUSE_SPICONFIG_RET_SPICLK_MASK)
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#define EFUSE_SPICONFIG_RET_SPIQ_MASK 0x3f
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#define EFUSE_SPICONFIG_RET_SPIQ_SHIFT 6
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#define EFUSE_SPICONFIG_RET_SPIQ(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPIQ_SHIFT) & EFUSE_SPICONFIG_RET_SPIQ_MASK)
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#define EFUSE_SPICONFIG_RET_SPID_MASK 0x3f
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#define EFUSE_SPICONFIG_RET_SPID_SHIFT 12
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#define EFUSE_SPICONFIG_RET_SPID(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPID_SHIFT) & EFUSE_SPICONFIG_RET_SPID_MASK)
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#define EFUSE_SPICONFIG_RET_SPICS0_MASK 0x3f
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#define EFUSE_SPICONFIG_RET_SPICS0_SHIFT 18
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#define EFUSE_SPICONFIG_RET_SPICS0(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPICS0_SHIFT) & EFUSE_SPICONFIG_RET_SPICS0_MASK)
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#define EFUSE_SPICONFIG_RET_SPIHD_MASK 0x3f
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#define EFUSE_SPICONFIG_RET_SPIHD_SHIFT 24
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#define EFUSE_SPICONFIG_RET_SPIHD(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPIHD_SHIFT) & EFUSE_SPICONFIG_RET_SPIHD_MASK)
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/**
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* @brief Enable JTAG temporarily by writing a JTAG HMAC "key" into
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* the JTAG_CTRL registers.
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*
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* Works if JTAG has been "soft" disabled by burning the EFUSE_SOFT_DIS_JTAG efuse.
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*
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* Will enable the HMAC module to generate a "downstream" HMAC value from a key already saved in efuse, and then write the JTAG HMAC "key" which will enable JTAG if the two keys match.
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*
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* @param jtag_hmac_key Pointer to a 32 byte array containing a valid key. Supplied by user.
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* @param key_block Index of a key block containing the source for this key.
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*
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* @return ETS_FAILED if HMAC operation fails or invalid parameter, ETS_OK otherwise. ETS_OK doesn't necessarily mean that JTAG was enabled.
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*/
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int ets_jtag_enable_temporarily(const uint8_t *jtag_hmac_key, ets_efuse_block_t key_block);
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/**
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* @brief A crc8 algorithm used for MAC addresses in efuse
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*
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* @param unsigned char const *p : Pointer to original data.
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*
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* @param unsigned int len : Data length in byte.
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*
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* @return unsigned char: Crc value.
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*/
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unsigned char esp_crc8(unsigned char const *p, unsigned int len);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ROM_EFUSE_H_ */
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