stm32_flash_api_extensions.h

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/*
 * Copyright (c) 2023 Google Inc
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef __ZEPHYR_INCLUDE_DRIVERS_FLASH_STM32_FLASH_API_EXTENSIONS_H__
#define __ZEPHYR_INCLUDE_DRIVERS_FLASH_STM32_FLASH_API_EXTENSIONS_H__
 
#include <zephyr/drivers/flash.h>
 
enum stm32_ex_ops {
        /*
         * STM32 sector write protection control.
         *
         * As an input this operation takes a structure with two sector masks,
         * first mask is used to enable protection on sectors, while second mask
         * is used to do the opposite. If both masks are 0, then protection will
         * remain unchanged. If same sector is set on both masks, protection
         * will be enabled.
         *
         * As an output, sector mask with enabled protection is returned.
         * Input can be NULL if we only want to get protected sectors.
         * Output can be NULL if not needed.
         */
        FLASH_STM32_EX_OP_SECTOR_WP = FLASH_EX_OP_VENDOR_BASE,
        /*
         * STM32 sector readout protection control.
         *
         * As an input this operation takes structure with information about
         * desired RDP state. As an output the status after applying changes
         * is returned.
         */
        FLASH_STM32_EX_OP_RDP,
        /*
         * STM32 block option register.
         *
         * This operation causes option register to be locked until next boot.
         * After calling, it's not possible to change option bytes (WP, RDP,
         * user bytes).
         */
        FLASH_STM32_EX_OP_BLOCK_OPTION_REG,
        /*
         * STM32 block control register.
         *
         * This operation causes control register to be locked until next boot.
         * After calling, it's not possible to perform basic operation like
         * erasing or writing.
         */
        FLASH_STM32_EX_OP_BLOCK_CONTROL_REG,
        /*
         * STM32 option bytes read.
         *
         * Read the option bytes content, out takes a *uint32_t, in is unused.
         */
        FLASH_STM32_EX_OP_OPTB_READ,
        /*
         * STM32 option bytes write.
         *
         * Write the option bytes content, in takes the new value, out is
         * unused. Note that the new value only takes effect after the device
         * is restarted.
         */
        FLASH_STM32_EX_OP_OPTB_WRITE,
};
 
#if defined(CONFIG_FLASH_STM32_WRITE_PROTECT)
struct flash_stm32_ex_op_sector_wp_in {
        uint32_t enable_mask;
        uint32_t disable_mask;
};
 
struct flash_stm32_ex_op_sector_wp_out {
        uint32_t protected_mask;
};
#endif /* CONFIG_FLASH_STM32_WRITE_PROTECT */
 
#if defined(CONFIG_FLASH_STM32_READOUT_PROTECTION)
struct flash_stm32_ex_op_rdp {
        bool enable;
        bool permanent;
};
#endif /* CONFIG_FLASH_STM32_READOUT_PROTECTION */
 
#endif /* __ZEPHYR_INCLUDE_DRIVERS_FLASH_STM32_FLASH_API_EXTENSIONS_H__ */