// Copyright 2010-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _ROM_SPI_FLASH_H_
#define _ROM_SPI_FLASH_H_
#include <stdint.h>
#include <stdbool.h>
#include "esp_attr.h"
#include "soc/spi_reg.h"
#ifdef __cplusplus
extern "C" {
#endif
/** \defgroup spi_flash_apis, spi flash operation related apis
* @brief spi_flash apis
*/
/** @addtogroup spi_flash_apis
* @{
*/
/*************************************************************
* Note
*************************************************************
* 1. ESP32 chip have 4 SPI slave/master, however, SPI0 is
* used as an SPI master to access Flash and ext-SRAM by
* Cache module. It will support Decryto read for Flash,
* read/write for ext-SRAM. And SPI1 is also used as an
* SPI master for Flash read/write and ext-SRAM read/write.
* It will support Encrypto write for Flash.
* 2. As an SPI master, SPI support Highest clock to 80M,
* however, Flash with 80M Clock should be configured
* for different Flash chips. If you want to use 80M
* clock We should use the SPI that is certified by
* Espressif. However, the certification is not started
* at the time, so please use 40M clock at the moment.
* 3. SPI Flash can use 2 lines or 4 lines mode. If you
* use 2 lines mode, you can save two pad SPIHD and
* SPIWP for gpio. ESP32 support configured SPI pad for
* Flash, the configuration is stored in efuse and flash.
* However, the configurations of pads should be certified
* by Espressif. If you use this function, please use 40M
* clock at the moment.
* 4. ESP32 support to use Common SPI command to configure
* Flash to QIO mode, if you failed to configure with fix
* command. With Common SPI Command, ESP32 can also provide
* a way to use same Common SPI command groups on different
* Flash chips.
* 5. This functions are not protected by packeting, Please use the
*************************************************************
*/
#define PERIPHS_SPI_FLASH_CMD SPI_CMD_REG(1)
#define PERIPHS_SPI_FLASH_ADDR SPI_ADDR_REG(1)
#define PERIPHS_SPI_FLASH_CTRL SPI_CTRL_REG(1)
#define PERIPHS_SPI_FLASH_CTRL1 SPI_CTRL1_REG(1)
#define PERIPHS_SPI_FLASH_STATUS SPI_RD_STATUS_REG(1)
#define PERIPHS_SPI_FLASH_USRREG SPI_USER_REG(1)
#define PERIPHS_SPI_FLASH_USRREG1 SPI_USER1_REG(1)
#define PERIPHS_SPI_FLASH_USRREG2 SPI_USER2_REG(1)
#define PERIPHS_SPI_FLASH_C0 SPI_W0_REG(1)
#define PERIPHS_SPI_FLASH_C1 SPI_W1_REG(1)
#define PERIPHS_SPI_FLASH_C2 SPI_W2_REG(1)
#define PERIPHS_SPI_FLASH_C3 SPI_W3_REG(1)
#define PERIPHS_SPI_FLASH_C4 SPI_W4_REG(1)
#define PERIPHS_SPI_FLASH_C5 SPI_W5_REG(1)
#define PERIPHS_SPI_FLASH_C6 SPI_W6_REG(1)
#define PERIPHS_SPI_FLASH_C7 SPI_W7_REG(1)
#define PERIPHS_SPI_FLASH_TX_CRC SPI_TX_CRC_REG(1)
#define SPI0_R_QIO_DUMMY_CYCLELEN 3
#define SPI0_R_QIO_ADDR_BITSLEN 31
#define SPI0_R_FAST_DUMMY_CYCLELEN 7
#define SPI0_R_DIO_DUMMY_CYCLELEN 3
#define SPI0_R_FAST_ADDR_BITSLEN 23
#define SPI0_R_SIO_ADDR_BITSLEN 23
#define SPI1_R_QIO_DUMMY_CYCLELEN 3
#define SPI1_R_QIO_ADDR_BITSLEN 31
#define SPI1_R_FAST_DUMMY_CYCLELEN 7
#define SPI1_R_DIO_DUMMY_CYCLELEN 3
#define SPI1_R_DIO_ADDR_BITSLEN 31
#define SPI1_R_FAST_ADDR_BITSLEN 23
#define SPI1_R_SIO_ADDR_BITSLEN 23
#define ESP_ROM_SPIFLASH_W_SIO_ADDR_BITSLEN 23
#define ESP_ROM_SPIFLASH_TWO_BYTE_STATUS_EN SPI_WRSR_2B
//SPI address register
#define ESP_ROM_SPIFLASH_BYTES_LEN 24
#define ESP_ROM_SPIFLASH_BUFF_BYTE_WRITE_NUM 32
#define ESP_ROM_SPIFLASH_BUFF_BYTE_READ_NUM 64
#define ESP_ROM_SPIFLASH_BUFF_BYTE_READ_BITS 0x3f
//SPI status register
#define ESP_ROM_SPIFLASH_BUSY_FLAG BIT0
#define ESP_ROM_SPIFLASH_WRENABLE_FLAG BIT1
#define ESP_ROM_SPIFLASH_BP0 BIT2
#define ESP_ROM_SPIFLASH_BP1 BIT3
#define ESP_ROM_SPIFLASH_BP2 BIT4
#define ESP_ROM_SPIFLASH_WR_PROTECT (ESP_ROM_SPIFLASH_BP0|ESP_ROM_SPIFLASH_BP1|ESP_ROM_SPIFLASH_BP2)
#define ESP_ROM_SPIFLASH_QE BIT9
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_read_mode_t;
typedef enum {
ESP_ROM_SPIFLASH_RESULT_OK,
ESP_ROM_SPIFLASH_RESULT_ERR,
ESP_ROM_SPIFLASH_RESULT_TIMEOUT
} esp_rom_spiflash_result_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 struct {
uint8_t data_length;
uint8_t read_cmd0;
uint8_t read_cmd1;
uint8_t write_cmd;
uint16_t data_mask;
uint16_t data;
} esp_rom_spiflash_common_cmd_t;
/**
* @brief Fix the bug in SPI hardware communication with Flash/Ext-SRAM in High Speed.
* Please do not call this function in SDK.
*
* @param uint8_t spi: 0 for SPI0(Cache Access), 1 for SPI1(Flash read/write).
*
* @param uint8_t freqdiv: Pll is 80M, 4 for 20M, 3 for 26.7M, 2 for 40M, 1 for 80M.
*
* @return None
*/
void esp_rom_spiflash_fix_dummylen(uint8_t spi, uint8_t freqdiv);
/**
* @brief Select SPI Flash to QIO mode when WP pad is read from Flash.
* Please do not call this function in SDK.
*
* @param uint8_t wp_gpio_num: WP gpio number.
*
* @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
*
* @return None
*/
void esp_rom_spiflash_select_qiomode(uint8_t wp_gpio_num, uint32_t ishspi);
/**
* @brief Set SPI Flash pad drivers.
* Please do not call this function in SDK.
*
* @param uint8_t wp_gpio_num: WP gpio number.
*
* @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 *drvs: drvs[0]-bit[3:0] for cpiclk, bit[7:4] for spiq, drvs[1]-bit[3:0] for spid, drvs[1]-bit[7:4] for spid
* drvs[2]-bit[3:0] for spihd, drvs[2]-bit[7:4] for spiwp.
* Values usually read from falsh by rom code, function usually callde by rom code.
* if value with bit(3) set, the value is valid, bit[2:0] is the real value.
*
* @return None
*/
void esp_rom_spiflash_set_drvs(uint8_t wp_gpio_num, uint32_t ishspi, uint8_t *drvs);
/**
* @brief Select SPI Flash function for pads.
* 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
*
* @return None
*/
void esp_rom_spiflash_select_padsfunc(uint32_t ishspi);
/**
* @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: In legacy mode, more SPI command is used in line.
*
* @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 Falsh 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 Send CommonCmd to Flash so that is can go into QIO mode, some Flash use different CMD.
* Please do not call this function in SDK.
*
* @param esp_rom_spiflash_common_cmd_t *cmd : A struct to show the action of a command.
*
* @return uint16_t 0 : do not send command any more.
* 1 : go to the next command.
* n > 1 : skip (n - 1) commands.
*/
uint16_t esp_rom_spiflash_common_cmd(esp_rom_spiflash_common_cmd_t *cmd);
/**
* @brief Unlock SPI write protect.
* Please do not call this function in SDK.
*
* @param None.
*
* @return ESP_ROM_SPIFLASH_RESULT_OK : Unlock OK.
* ESP_ROM_SPIFLASH_RESULT_ERR : Unlock error.
* ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Unlock timeout.
*/
esp_rom_spiflash_result_t esp_rom_spiflash_unlock(void);
/**
* @brief SPI write protect.
* Please do not call this function in SDK.
*
* @param None.
*
* @return ESP_ROM_SPIFLASH_RESULT_OK : Lock OK.
* ESP_ROM_SPIFLASH_RESULT_ERR : Lock error.
* ESP_ROM_SPIFLASH_RESULT_TIMEOUT : Lock timeout.
*/
esp_rom_spiflash_result_t esp_rom_spiflash_lock(void);
/**
* @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 Global esp_rom_spiflash_chip_t structure used by ROM functions
*
*/
extern esp_rom_spiflash_chip_t g_rom_flashchip;
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* _ROM_SPI_FLASH_H_ */