esp-idf/components/esp_rom/include/esp_rom_spiflash.h

/*
 * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */


#pragma once

#include "sdkconfig.h"
#include <stdint.h>
#include <stdbool.h>
#include "esp_rom_spiflash_defs.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
    ESP_ROM_SPIFLASH_QIO_MODE = 0,
    ESP_ROM_SPIFLASH_QOUT_MODE,
    ESP_ROM_SPIFLASH_DIO_MODE,
    ESP_ROM_SPIFLASH_DOUT_MODE,
    ESP_ROM_SPIFLASH_FASTRD_MODE,
    ESP_ROM_SPIFLASH_SLOWRD_MODE,
    ESP_ROM_SPIFLASH_OPI_STR_MODE,
    ESP_ROM_SPIFLASH_OPI_DTR_MODE,
    ESP_ROM_SPIFLASH_OOUT_MODE,
    ESP_ROM_SPIFLASH_OIO_STR_MODE,
    ESP_ROM_SPIFLASH_OIO_DTR_MODE,
    ESP_ROM_SPIFLASH_QPI_MODE,
    ESP_ROM_SPIFLASH_OPI_HEX_DTR_MODE,
} esp_rom_spiflash_read_mode_t;

typedef struct {
    uint32_t device_id;
    uint32_t chip_size;    // chip size in bytes
    uint32_t block_size;
    uint32_t sector_size;
    uint32_t page_size;
    uint32_t status_mask;
} esp_rom_spiflash_chip_t;

typedef enum {
    ESP_ROM_SPIFLASH_RESULT_OK,
    ESP_ROM_SPIFLASH_RESULT_ERR,
    ESP_ROM_SPIFLASH_RESULT_TIMEOUT
} esp_rom_spiflash_result_t;

/**
  * @brief SPI Flash init, clock divisor is 4, use 1 line Slow read mode.
  *    Please do not call this function in SDK.
  *
  * @param  uint32_t ishspi: 0 for spi, 1 for hspi, flash pad decided by strapping
  *              else, bit[5:0] spiclk, bit[11:6] spiq, bit[17:12] spid, bit[23:18] spics0, bit[29:24] spihd
  *
  * @param  uint8_t legacy: always keeping false.
  *
  * @return None
  */
void esp_rom_spiflash_attach(uint32_t ishspi, bool legacy);

/**
  * @brief SPI Read Flash status register. We use CMD 0x05 (RDSR).
  *    Please do not call this function in SDK.
  *
  * @param  esp_rom_spiflash_chip_t *spi : The information for Flash, which is exported from ld file.
  *
  * @param  uint32_t *status : The pointer to which to return the Flash status value.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : read OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : read error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : read timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_read_status(esp_rom_spiflash_chip_t *spi, uint32_t *status);

/**
  * @brief SPI Read Flash status register bits 8-15. We use CMD 0x35 (RDSR2).
  *        Please do not call this function in SDK.
  *
  * @param  esp_rom_spiflash_chip_t *spi : The information for Flash, which is exported from ld file.
  *
  * @param  uint32_t *status : The pointer to which to return the Flash status value.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : read OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : read error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : read timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_read_statushigh(esp_rom_spiflash_chip_t *spi, uint32_t *status);

/**
  * @brief Write status to Flash status register.
  *        Please do not call this function in SDK.
  *
  * @param  esp_rom_spiflash_chip_t *spi : The information for Flash, which is exported from ld file.
  *
  * @param  uint32_t status_value : Value to .
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : write OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : write error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : write timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_write_status(esp_rom_spiflash_chip_t *spi, uint32_t status_value);

/**
  * @brief Use a command to Read Flash status register.
  *        Please do not call this function in SDK.
  *
  * @param  esp_rom_spiflash_chip_t *spi : The information for Flash, which is exported from ld file.
  *
  * @param  uint32_t*status : The pointer to which to return the Flash status value.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : read OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : read error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : read timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_read_user_cmd(uint32_t *status, uint8_t cmd);

/**
  * @brief Config SPI Flash read mode when init.
  *        Please do not call this function in SDK.
  *
  * @param  esp_rom_spiflash_read_mode_t mode : QIO/QOUT/DIO/DOUT/FastRD/SlowRD.
  *
  * This function does not try to set the QIO Enable bit in the status register, caller is responsible for this.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : config OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : config error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : config timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_config_readmode(esp_rom_spiflash_read_mode_t mode);

/**
  * @brief Config SPI Flash clock divisor.
  *        Please do not call this function in SDK.
  *
  * @param  uint8_t freqdiv: clock divisor.
  *
  * @param  uint8_t spi: 0 for SPI0, 1 for SPI1.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : config OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : config error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : config timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_config_clk(uint8_t freqdiv, uint8_t spi);

/**
  * @brief Update SPI Flash parameter.
  *        Please do not call this function in SDK.
  *
  * @param  uint32_t deviceId : Device ID read from SPI, the low 32 bit.
  *
  * @param  uint32_t chip_size : The Flash size.
  *
  * @param  uint32_t block_size : The Flash block size.
  *
  * @param  uint32_t sector_size : The Flash sector size.
  *
  * @param  uint32_t page_size : The Flash page size.
  *
  * @param  uint32_t status_mask : The Mask used when read status from Flash(use single CMD).
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Update OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Update error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Update timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_config_param(uint32_t deviceId, uint32_t chip_size, uint32_t block_size,
                                                        uint32_t sector_size, uint32_t page_size, uint32_t status_mask);

/**
  * @brief Erase whole flash chip.
  *        Please do not call this function in SDK.
  *
  * @param  None
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Erase OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Erase error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Erase timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_erase_chip(void);

/**
  * @brief Erase a 64KB block of flash
  *        Uses SPI flash command D8H.
  *        Please do not call this function in SDK.
  *
  * @param  uint32_t block_num : Which block to erase.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Erase OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Erase error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Erase timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_erase_block(uint32_t block_num);

/**
  * @brief Erase a sector of flash.
  *        Uses SPI flash command 20H.
  *        Please do not call this function in SDK.
  *
  * @param  uint32_t sector_num : Which sector to erase.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Erase OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Erase error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Erase timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_erase_sector(uint32_t sector_num);

/**
  * @brief Erase some sectors.
  *        Please do not call this function in SDK.
  *
  * @param  uint32_t start_addr : Start addr to erase, should be sector aligned.
  *
  * @param  uint32_t area_len : Length to erase, should be sector aligned.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Erase OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Erase error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Erase timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_erase_area(uint32_t start_addr, uint32_t area_len);

/**
  * @brief Write Data to Flash, you should Erase it yourself if need.
  *        Please do not call this function in SDK.
  *
  * @param  uint32_t dest_addr : Address to write, should be 4 bytes aligned.
  *
  * @param  const uint32_t *src : The pointer to data which is to write.
  *
  * @param  uint32_t len : Length to write, should be 4 bytes aligned.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Write OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Write error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Write timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_write(uint32_t dest_addr, const uint32_t *src, int32_t len);

/**
  * @brief Read Data from Flash, you should Erase it yourself if need.
  *        Please do not call this function in SDK.
  *
  * @param  uint32_t src_addr : Address to read, should be 4 bytes aligned.
  *
  * @param  uint32_t *dest : The buf to read the data.
  *
  * @param  uint32_t len : Length to read, should be 4 bytes aligned.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Read OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Read error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Read timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_read(uint32_t src_addr, uint32_t *dest, int32_t len);

/**
  * @brief SPI1 go into encrypto mode.
  *        Please do not call this function in SDK.
  *
  * @param  None
  *
  * @return None
  */
void esp_rom_spiflash_write_encrypted_enable(void);

/**
  * @brief Prepare 32 Bytes data to encrpto writing, you should Erase it yourself if need.
  *        Please do not call this function in SDK.
  *
  * @param  uint32_t flash_addr : Address to write, should be 32 bytes aligned.
  *
  * @param  uint32_t *data : The pointer to data which is to write.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Prepare OK.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Prepare error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Prepare timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_prepare_encrypted_data(uint32_t flash_addr, uint32_t *data);

/**
  * @brief SPI1 go out of encrypto mode.
  *        Please do not call this function in SDK.
  *
  * @param  None
  *
  * @return None
  */
void esp_rom_spiflash_write_encrypted_disable(void);

/**
  * @brief Write data to flash with transparent encryption.
  * @note Sectors to be written should already be erased.
  *
  * @note Please do not call this function in SDK.
  *
  * @param  uint32_t flash_addr : Address to write, should be 32 byte aligned.
  *
  * @param  uint32_t *data : The pointer to data to write. Note, this pointer must
  *                          be 32 bit aligned and the content of the data will be
  *                          modified by the encryption function.
  *
  * @param  uint32_t len : Length to write, should be 32 bytes aligned.
  *
  * @return ESP_ROM_SPIFLASH_RESULT_OK : Data written successfully.
  *         ESP_ROM_SPIFLASH_RESULT_ERR : Encryption write error.
  *         ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Encrypto write timeout.
  */
esp_rom_spiflash_result_t esp_rom_spiflash_write_encrypted(uint32_t flash_addr, uint32_t *data, uint32_t len);


/** @brief Wait until SPI flash write operation is complete
 *
 * @note Please do not call this function in SDK.
 *
 * Reads the Write In Progress bit of the SPI flash status register,
 * repeats until this bit is zero (indicating write complete).
 *
 * @return ESP_ROM_SPIFLASH_RESULT_OK : Write is complete
 *         ESP_ROM_SPIFLASH_RESULT_ERR : Error while reading status.
 */
esp_rom_spiflash_result_t esp_rom_spiflash_wait_idle(esp_rom_spiflash_chip_t *spi);


/** @brief Enable Quad I/O pin functions
 *
 * @note Please do not call this function in SDK.
 *
 * Sets the HD & WP pin functions for Quad I/O modes, based on the
 * efuse SPI pin configuration.
 *
 * @param wp_gpio_num - Number of the WP pin to reconfigure for quad I/O.
 *
 * @param spiconfig - Pin configuration, as returned from ets_efuse_get_spiconfig().
 * - If this parameter is 0, default SPI pins are used and wp_gpio_num parameter is ignored.
 * - If this parameter is 1, default HSPI pins are used and wp_gpio_num parameter is ignored.
 * - For other values, this parameter encodes the HD pin number and also the CLK pin number. CLK pin selection is used
 *   to determine if HSPI or SPI peripheral will be used (use HSPI if CLK pin is the HSPI clock pin, otherwise use SPI).
 *   Both HD & WP pins are configured via GPIO matrix to map to the selected peripheral.
 */
void esp_rom_spiflash_select_qio_pins(uint8_t wp_gpio_num, uint32_t spiconfig);

/**
 * @brief Clear WEL bit unconditionally.
 *
 * @return always ESP_ROM_SPIFLASH_RESULT_OK
 */
esp_rom_spiflash_result_t esp_rom_spiflash_write_disable(void);

/**
 * @brief Set WREN bit.
 *
 * @param  esp_rom_spiflash_chip_t *spi : The information for Flash, which is exported from ld file.
 *
 * @return always ESP_ROM_SPIFLASH_RESULT_OK
 */
esp_rom_spiflash_result_t esp_rom_spiflash_write_enable(esp_rom_spiflash_chip_t *spi);

/* Flash data defined in ROM*/
#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
extern esp_rom_spiflash_chip_t g_rom_flashchip;
extern uint8_t g_rom_spiflash_dummy_len_plus[];
#else
typedef struct {
    esp_rom_spiflash_chip_t chip;
    uint8_t dummy_len_plus[3];
    uint8_t sig_matrix;
} esp_rom_spiflash_legacy_data_t;

extern esp_rom_spiflash_legacy_data_t *rom_spiflash_legacy_data;
#define g_rom_flashchip (rom_spiflash_legacy_data->chip)
#define g_rom_spiflash_dummy_len_plus (rom_spiflash_legacy_data->dummy_len_plus)
#endif

#ifdef __cplusplus
}
#endif