/* * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #ifndef _ROM_EFUSE_H_ #define _ROM_EFUSE_H_ #ifdef __cplusplus extern "C" { #endif #include <stdint.h> #include <stddef.h> #include <stdbool.h> /** \defgroup efuse_APIs efuse APIs * @brief ESP32 efuse read/write APIs * @attention * */ /** @addtogroup efuse_APIs * @{ */ typedef enum { ETS_EFUSE_KEY_PURPOSE_USER = 0, ETS_EFUSE_KEY_PURPOSE_RESERVED = 1, ETS_EFUSE_KEY_PURPOSE_XTS_AES_128_KEY = 4, ETS_EFUSE_KEY_PURPOSE_HMAC_DOWN_ALL = 5, ETS_EFUSE_KEY_PURPOSE_HMAC_DOWN_JTAG = 6, ETS_EFUSE_KEY_PURPOSE_HMAC_DOWN_DIGITAL_SIGNATURE = 7, ETS_EFUSE_KEY_PURPOSE_HMAC_UP = 8, ETS_EFUSE_KEY_PURPOSE_SECURE_BOOT_DIGEST0 = 9, ETS_EFUSE_KEY_PURPOSE_SECURE_BOOT_DIGEST1 = 10, ETS_EFUSE_KEY_PURPOSE_SECURE_BOOT_DIGEST2 = 11, ETS_EFUSE_KEY_PURPOSE_MAX, } ets_efuse_purpose_t; typedef enum { ETS_EFUSE_BLOCK0 = 0, ETS_EFUSE_MAC_SPI_SYS_0 = 1, ETS_EFUSE_BLOCK_SYS_DATA = 2, ETS_EFUSE_BLOCK_USR_DATA = 3, ETS_EFUSE_BLOCK_KEY0 = 4, ETS_EFUSE_BLOCK_KEY1 = 5, ETS_EFUSE_BLOCK_KEY2 = 6, ETS_EFUSE_BLOCK_KEY3 = 7, ETS_EFUSE_BLOCK_KEY4 = 8, ETS_EFUSE_BLOCK_KEY5 = 9, ETS_EFUSE_BLOCK_KEY6 = 10, ETS_EFUSE_BLOCK_MAX, } ets_efuse_block_t; /** * @brief set timing accroding the apb clock, so no read error or write error happens. * * @param clock: apb clock in HZ, only accept 5M(in FPGA), 10M(in FPGA), 20M, 40M, 80M. * * @return : 0 if success, others if clock not accepted */ int ets_efuse_set_timing(uint32_t clock); /** * @brief Enable efuse subsystem. Called after reset. Doesn't need to be called again. */ void ets_efuse_start(void); /** * @brief Efuse read operation: copies data from physical efuses to efuse read registers. * * @param null * * @return : 0 if success, others if apb clock is not accepted */ int ets_efuse_read(void); /** * @brief Efuse write operation: Copies data from efuse write registers to efuse. Operates on a single block of efuses at a time. * * @note This function does not update read efuses, call ets_efuse_read() once all programming is complete. * * @return : 0 if success, others if apb clock is not accepted */ int ets_efuse_program(ets_efuse_block_t block); /** * @brief Set all Efuse program registers to zero. * * Call this before writing new data to the program registers. */ void ets_efuse_clear_program_registers(void); /** * @brief Program a block of key data to an efuse block * * @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). * @param purpose Purpose to set for this key. Purpose must be already unset. * @param data Pointer to data to write. * @param data_len Length of data to write. * * @note This function also calls ets_efuse_program() for the specified block, and for block 0 (setting the purpose) */ int ets_efuse_write_key(ets_efuse_block_t key_block, ets_efuse_purpose_t purpose, const void *data, size_t data_len); /* @brief Return the address of a particular efuse block's first read register * * @param block Index of efuse block to look up * * @return 0 if block is invalid, otherwise a numeric read register address * of the first word in the block. */ uint32_t ets_efuse_get_read_register_address(ets_efuse_block_t block); /** * @brief Return the current purpose set for an efuse key block * * @param key_block Block to read purpose for. Must be in range ETS_EFUSE_BLOCK_KEY0 to ETS_EFUSE_BLOCK_KEY6. */ ets_efuse_purpose_t ets_efuse_get_key_purpose(ets_efuse_block_t key_block); /** * @brief Find a key block with the particular purpose set * * @param purpose Purpose to search for. * @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. * @return true if found, false if not found. If false, value at key_block pointer is unchanged. */ bool ets_efuse_find_purpose(ets_efuse_purpose_t purpose, ets_efuse_block_t *key_block); /** * Return true if the key block is unused, false otherwise. * * An unused key block is all zero content, not read or write protected, * and has purpose 0 (ETS_EFUSE_KEY_PURPOSE_USER) * * @param key_block key block to check. * * @return true if key block is unused, false if key block or used * or the specified block index is not a key block. */ bool ets_efuse_key_block_unused(ets_efuse_block_t key_block); /** * @brief Search for an unused key block and return the first one found. * * See @ref ets_efuse_key_block_unused for a description of an unused key block. * * @return First unused key block, or ETS_EFUSE_BLOCK_MAX if no unused key block is found. */ ets_efuse_block_t ets_efuse_find_unused_key_block(void); /** * @brief Return the number of unused efuse key blocks (0-6) */ unsigned ets_efuse_count_unused_key_blocks(void); /** * @brief Calculate Reed-Solomon Encoding values for a block of efuse data. * * @param data Pointer to data buffer (length 32 bytes) * @param rs_values Pointer to write encoded data to (length 12 bytes) */ void ets_efuse_rs_calculate(const void *data, void *rs_values); /** * @brief Read spi flash pads configuration from Efuse * * @return * - 0 for default SPI pins. * - 1 for default HSPI pins. * - Other values define a custom pin configuration mask. Pins are encoded as per the EFUSE_SPICONFIG_RET_SPICLK, * EFUSE_SPICONFIG_RET_SPIQ, EFUSE_SPICONFIG_RET_SPID, EFUSE_SPICONFIG_RET_SPICS0, EFUSE_SPICONFIG_RET_SPIHD macros. * WP pin (for quad I/O modes) is not saved in efuse and not returned by this function. */ uint32_t ets_efuse_get_spiconfig(void); /** * @brief Read spi flash wp pad from Efuse * * @return * - 0x3f for invalid. * - 0~46 is valid. */ uint32_t ets_efuse_get_wp_pad(void); /** * @brief Read opi flash pads configuration from Efuse * * @return * - 0 for default SPI pins. * - Other values define a custom pin configuration mask. From the LSB, every 6 bits represent a GPIO number which stand for: * DQS, D4, D5, D6, D7 accordingly. */ uint32_t ets_efuse_get_opiconfig(void); /** * @brief Read if download mode disabled from Efuse * * @return * - true for efuse disable download mode. * - false for efuse doesn't disable download mode. */ bool ets_efuse_download_modes_disabled(void); /** * @brief Read if legacy spi flash boot mode disabled from Efuse * * @return * - true for efuse disable legacy spi flash boot mode. * - false for efuse doesn't disable legacy spi flash boot mode. */ bool ets_efuse_legacy_spi_boot_mode_disabled(void); /** * @brief Read if uart print control value from Efuse * * @return * - 0 for uart force print. * - 1 for uart print when GPIO8 is low when digital reset. * 2 for uart print when GPIO8 is high when digital reset. * 3 for uart force slient */ uint32_t ets_efuse_get_uart_print_control(void); /** * @brief Read if USB-Serial-JTAG print during rom boot is disabled from Efuse * * @return * - 1 for efuse disable USB-Serial-JTAG print during rom boot. * - 0 for efuse doesn't disable USB-Serial-JTAG print during rom boot. */ uint32_t ets_efuse_usb_serial_jtag_print_is_disabled(void); /** * @brief Read if usb download mode disabled from Efuse * * (Also returns true if security download mode is enabled, as this mode * disables USB download.) * * @return * - true for efuse disable usb download mode. * - false for efuse doesn't disable usb download mode. */ bool ets_efuse_usb_download_mode_disabled(void); /** * @brief Read if tiny basic mode disabled from Efuse * * @return * - true for efuse disable tiny basic mode. * - false for efuse doesn't disable tiny basic mode. */ bool ets_efuse_tiny_basic_mode_disabled(void); /** * @brief Read if usb module disabled from Efuse * * @return * - true for efuse disable usb module. * - false for efuse doesn't disable usb module. */ bool ets_efuse_usb_module_disabled(void); /** * @brief Read if security download modes enabled from Efuse * * @return * - true for efuse enable security download mode. * - false for efuse doesn't enable security download mode. */ bool ets_efuse_security_download_modes_enabled(void); /** * @brief Return true if secure boot is enabled in EFuse */ bool ets_efuse_secure_boot_enabled(void); /** * @brief Return true if secure boot aggressive revoke is enabled in EFuse */ bool ets_efuse_secure_boot_aggressive_revoke_enabled(void); /** * @brief Return true if cache encryption (flash, etc) is enabled from boot via EFuse */ bool ets_efuse_cache_encryption_enabled(void); /** * @brief Return true if EFuse indicates an external phy needs to be used for USB */ bool ets_efuse_usb_use_ext_phy(void); /** * @brief Return true if EFuse indicates USB device persistence is disabled */ bool ets_efuse_usb_force_nopersist(void); /** * @brief Return true if OPI pins GPIO33-37 are powered by VDDSPI, otherwise by VDD33CPU */ bool ets_efuse_flash_opi_5pads_power_sel_vddspi(void); /** * @brief Return true if EFuse indicates an opi flash is attached. */ bool ets_efuse_flash_opi_mode(void); /** * @brief Return true if EFuse indicates to send a flash resume command. */ bool ets_efuse_force_send_resume(void); /** * @brief return the time in us ROM boot need wait flash to power on from Efuse * * @return * - uint32_t the time in us. */ uint32_t ets_efuse_get_flash_delay_us(void); #define EFUSE_SPICONFIG_SPI_DEFAULTS 0 #define EFUSE_SPICONFIG_HSPI_DEFAULTS 1 #define EFUSE_SPICONFIG_RET_SPICLK_MASK 0x3f #define EFUSE_SPICONFIG_RET_SPICLK_SHIFT 0 #define EFUSE_SPICONFIG_RET_SPICLK(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPICLK_SHIFT) & EFUSE_SPICONFIG_RET_SPICLK_MASK) #define EFUSE_SPICONFIG_RET_SPIQ_MASK 0x3f #define EFUSE_SPICONFIG_RET_SPIQ_SHIFT 6 #define EFUSE_SPICONFIG_RET_SPIQ(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPIQ_SHIFT) & EFUSE_SPICONFIG_RET_SPIQ_MASK) #define EFUSE_SPICONFIG_RET_SPID_MASK 0x3f #define EFUSE_SPICONFIG_RET_SPID_SHIFT 12 #define EFUSE_SPICONFIG_RET_SPID(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPID_SHIFT) & EFUSE_SPICONFIG_RET_SPID_MASK) #define EFUSE_SPICONFIG_RET_SPICS0_MASK 0x3f #define EFUSE_SPICONFIG_RET_SPICS0_SHIFT 18 #define EFUSE_SPICONFIG_RET_SPICS0(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPICS0_SHIFT) & EFUSE_SPICONFIG_RET_SPICS0_MASK) #define EFUSE_SPICONFIG_RET_SPIHD_MASK 0x3f #define EFUSE_SPICONFIG_RET_SPIHD_SHIFT 24 #define EFUSE_SPICONFIG_RET_SPIHD(ret) (((ret) >> EFUSE_SPICONFIG_RET_SPIHD_SHIFT) & EFUSE_SPICONFIG_RET_SPIHD_MASK) /** * @brief Enable JTAG temporarily by writing a JTAG HMAC "key" into * the JTAG_CTRL registers. * * Works if JTAG has been "soft" disabled by burning the EFUSE_SOFT_DIS_JTAG efuse. * * 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. * * @param jtag_hmac_key Pointer to a 32 byte array containing a valid key. Supplied by user. * @param key_block Index of a key block containing the source for this key. * * @return ETS_FAILED if HMAC operation fails or invalid parameter, ETS_OK otherwise. ETS_OK doesn't necessarily mean that JTAG was enabled. */ int ets_jtag_enable_temporarily(const uint8_t *jtag_hmac_key, ets_efuse_block_t key_block); /** * @brief A crc8 algorithm used for MAC addresses in efuse * * @param unsigned char const *p : Pointer to original data. * * @param unsigned int len : Data length in byte. * * @return unsigned char: Crc value. */ unsigned char esp_crc8(unsigned char const *p, unsigned int len); /** * @} */ #ifdef __cplusplus } #endif #endif /* _ROM_EFUSE_H_ */