/** * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef NRF_FSTORAGE_H__ #define NRF_FSTORAGE_H__ /** * @file * * @defgroup nrf_fstorage Flash storage (fstorage) * @ingroup app_common * @{ * * @brief Flash abstraction library that provides basic read, write, and erase operations. * * @details The fstorage library can be implemented in different ways. Two implementations are provided: * - The @ref nrf_fstorage_sd implements flash access through the SoftDevice. * - The @ref nrf_fstorage_nvmc implements flash access through the non-volatile memory controller. * * You can select the implementation that should be used independently for each instance of fstorage. */ #include #include #include "sdk_errors.h" #include "nrf_section.h" #ifdef __cplusplus extern "C" { #endif /**@brief Macro for defining an fstorage instance. * * Users of fstorage must define an instance variable by using this macro. * Each instance is tied to an API implementation and contains information such * as the program and erase units for the target flash peripheral. * Instance variables are placed in the "fs_data" section of the binary. * * @param[in] inst A definition of an @ref nrf_fstorage_t variable. */ #define NRF_FSTORAGE_DEF(inst) NRF_SECTION_ITEM_REGISTER(fs_data, inst) /**@brief Macro for retrieving an fstorage instance. */ #define NRF_FSTORAGE_INSTANCE_GET(i) NRF_SECTION_ITEM_GET(fs_data, nrf_fstorage_t, (i)) /**@brief Macro for retrieving the total number of fstorage instances. */ #define NRF_FSTORAGE_INSTANCE_CNT NRF_SECTION_ITEM_COUNT(fs_data, nrf_fstorage_t) /**@brief Event IDs. */ typedef enum { NRF_FSTORAGE_EVT_READ_RESULT, NRF_FSTORAGE_EVT_WRITE_RESULT, //!< Event for @ref nrf_fstorage_write. NRF_FSTORAGE_EVT_ERASE_RESULT //!< Event for @ref nrf_fstorage_erase. } nrf_fstorage_evt_id_t; /**@brief An fstorage event. */ typedef struct { nrf_fstorage_evt_id_t id; //!< The event ID. ret_code_t result; //!< Result of the operation. uint32_t addr; //!< Address at which the operation was performed. void const * p_src; //!< Buffer written to flash. uint32_t len; //!< Length of the operation. void * p_param; //!< User-defined parameter passed to the event handler. } nrf_fstorage_evt_t; /**@brief Event handler function prototype. * * @param[in] p_evt The event. */ typedef void (*nrf_fstorage_evt_handler_t)(nrf_fstorage_evt_t * p_evt); /**@brief Information about the implementation and the flash peripheral. */ typedef struct { uint32_t erase_unit; //!< Size of a flash page (in bytes). A flash page is the smallest unit that can be erased. uint32_t program_unit; //!< Size of the smallest programmable unit (in bytes). bool rmap; //!< The device address space is memory mapped to the MCU address space. bool wmap; //!< The device address space is memory mapped to a writable MCU address space. } const nrf_fstorage_info_t; /* Necessary forward declaration. */ struct nrf_fstorage_api_s; /**@brief An fstorage instance. * * @details Use the @ref NRF_FSTORAGE_DEF macro to define an fstorage instance. * * An instance is tied to an API implementation and contains information about the flash device, * such as the program and erase units as well and implementation-specific functionality. */ typedef struct { /**@brief The API implementation used by this instance. */ struct nrf_fstorage_api_s const * p_api; /**@brief Information about the implementation functionality and the flash peripheral. */ nrf_fstorage_info_t * p_flash_info; /**@brief The event handler function. * * If set to NULL, no events will be sent. */ nrf_fstorage_evt_handler_t evt_handler; /**@brief The beginning of the flash space on which this fstorage instance should operate. * All flash operations must be within the address specified in * this field and @ref end_addr. * * This field must be set manually. */ uint32_t start_addr; /**@brief The last address (exclusive) of flash on which this fstorage instance should operate. * All flash operations must be within the address specified in * this field and @ref start_addr. * * This field must be set manually. */ uint32_t end_addr; } nrf_fstorage_t; /**@brief Functions provided by the API implementation. */ typedef struct nrf_fstorage_api_s { /**@brief Initialize the flash peripheral. */ ret_code_t (*init)(nrf_fstorage_t * p_fs, void * p_param); /**@brief Uninitialize the flash peripheral. */ ret_code_t (*uninit)(nrf_fstorage_t * p_fs, void * p_param); /**@brief Read data from flash. */ ret_code_t (*read)(nrf_fstorage_t const * p_fs, uint32_t src, void * p_dest, uint32_t len); /**@brief Write bytes to flash. */ ret_code_t (*write)(nrf_fstorage_t const * p_fs, uint32_t dest, void const * p_src, uint32_t len, void * p_param); /**@brief Erase flash pages. */ ret_code_t (*erase)(nrf_fstorage_t const * p_fs, uint32_t addr, uint32_t len, void * p_param); /**@brief Map a device address to a readable address within the MCU address space. */ uint8_t const * (*rmap)(nrf_fstorage_t const * p_fs, uint32_t addr); /**@brief Map a device address to a writable address within the MCU address space. */ uint8_t * (*wmap)(nrf_fstorage_t const * p_fs, uint32_t addr); /**@brief Check if there are any pending flash operations. */ bool (*is_busy)(nrf_fstorage_t const * p_fs); } const nrf_fstorage_api_t; /**@brief Function for initializing fstorage. * * @param[in] p_fs The fstorage instance to initialize. * @param[in] p_api The API implementation to use. * @param[in] p_param An optional parameter to pass to the implementation-specific API call. * * @retval NRF_SUCCESS If initialization was successful. * @retval NRF_ERROR_NULL If @p p_fs or @p p_api field in @p p_fs is NULL. * @retval NRF_ERROR_INTERNAL If another error occurred. */ ret_code_t nrf_fstorage_init(nrf_fstorage_t * p_fs, nrf_fstorage_api_t * p_api, void * p_param); /**@brief Function for uninitializing an fstorage instance. * * @param[in] p_fs The fstorage instance to uninitialize. * @param[in] p_param An optional parameter to pass to the implementation-specific API call. * * @retval NRF_SUCCESS If uninitialization was successful. * @retval NRF_ERROR_NULL If @p p_fs is NULL. * @retval NRF_ERROR_INVALID_STATE If the module is not initialized. * @retval NRF_ERROR_INTERNAL If another error occurred. */ ret_code_t nrf_fstorage_uninit(nrf_fstorage_t * p_fs, void * p_param); /**@brief Function for reading data from flash. * * Copy @p len bytes from @p addr to @p p_dest. * * @param[in] p_fs The fstorage instance. * @param[in] addr Address in flash where to read from. * @param[in] p_dest Buffer where the data should be copied. * @param[in] len Length of the data to be copied (in bytes). * * @retval NRF_SUCCESS If the operation was successful. * @retval NRF_ERROR_NULL If @p p_fs or @p p_dest is NULL. * @retval NRF_ERROR_INVALID_STATE If the module is not initialized. * @retval NRF_ERROR_INVALID_LENGTH If @p len is zero or otherwise invalid. * @retval NRF_ERROR_INVALID_ADDR If the address @p addr is outside the flash memory * boundaries specified in @p p_fs, or if it is unaligned. */ ret_code_t nrf_fstorage_read(nrf_fstorage_t const * p_fs, uint32_t addr, void * p_dest, uint32_t len); /**@brief Function for writing data to flash. * * Write @p len bytes from @p p_src to @p dest. * * When using @ref nrf_fstorage_sd, the data is written by several calls to @ref sd_flash_write if * the length of the data exceeds @ref NRF_FSTORAGE_SD_MAX_WRITE_SIZE bytes. * Only one event is sent upon completion. * * @note The data to be written to flash must be kept in memory until the operation has * terminated and an event is received. * * @param[in] p_fs The fstorage instance. * @param[in] dest Address in flash memory where to write the data. * @param[in] p_src Data to be written. * @param[in] len Length of the data (in bytes). * @param[in] p_param User-defined parameter passed to the event handler (may be NULL). * * @retval NRF_SUCCESS If the operation was accepted. * @retval NRF_ERROR_NULL If @p p_fs or @p p_src is NULL. * @retval NRF_ERROR_INVALID_STATE If the module is not initialized. * @retval NRF_ERROR_INVALID_LENGTH If @p len is zero or not a multiple of the program unit, * or if it is otherwise invalid. * @retval NRF_ERROR_INVALID_ADDR If the address @p dest is outside the flash memory * boundaries specified in @p p_fs, or if it is unaligned. * @retval NRF_ERROR_NO_MEM If no memory is available to accept the operation. * When using the @ref nrf_fstorage_sd, this error * indicates that the internal queue of operations is full. */ ret_code_t nrf_fstorage_write(nrf_fstorage_t const * p_fs, uint32_t dest, void const * p_src, uint32_t len, void * p_param); /**@brief Function for erasing flash pages. * * @details This function erases @p len pages starting from the page at address @p page_addr. * The erase operation must be initiated on a page boundary. * * @param[in] p_fs The fstorage instance. * @param[in] page_addr Address of the page to erase. * @param[in] len Number of pages to erase. * @param[in] p_param User-defined parameter passed to the event handler (may be NULL). * * @retval NRF_SUCCESS If the operation was accepted. * @retval NRF_ERROR_NULL If @p p_fs is NULL. * @retval NRF_ERROR_INVALID_STATE If the module is not initialized. * @retval NRF_ERROR_INVALID_LENGTH If @p len is zero. * @retval NRF_ERROR_INVALID_ADDR If the address @p page_addr is outside the flash memory * boundaries specified in @p p_fs, or if it is unaligned. * @retval NRF_ERROR_NO_MEM If no memory is available to accept the operation. * When using the @ref nrf_fstorage_sd, this error * indicates that the internal queue of operations is full. */ ret_code_t nrf_fstorage_erase(nrf_fstorage_t const * p_fs, uint32_t page_addr, uint32_t len, void * p_param); /**@brief Map a flash address to a pointer in the MCU address space that can be dereferenced. * * @param p_fs The fstorage instance. * @param addr The address to map. * * @retval A pointer to the specified address, * or @c NULL if the address cannot be mapped or if @p p_fs is @c NULL. */ uint8_t const * nrf_fstorage_rmap(nrf_fstorage_t const * p_fs, uint32_t addr); /**@brief Map a flash address to a pointer in the MCU address space that can be written to. * * @param p_fs The fstorage instance. * @param addr The address to map. * * @retval A pointer to the specified address, * or @c NULL if the address cannot be mapped or if @p p_fs is @c NULL. */ uint8_t * nrf_fstorage_wmap(nrf_fstorage_t const * p_fs, uint32_t addr); /**@brief Function for querying the status of fstorage. * * @details An uninitialized instance of fstorage is treated as not busy. * * @param[in] p_fs The fstorage instance. Pass NULL to query all instances. * * @returns If @p p_fs is @c NULL, this function returns true if any fstorage instance is busy or false otherwise. * @returns If @p p_fs is not @c NULL, this function returns true if the fstorage instance is busy or false otherwise. */ bool nrf_fstorage_is_busy(nrf_fstorage_t const * p_fs); /** @} */ #ifdef __cplusplus } #endif #endif // NRF_FSTORAGE_H__