/* mbed Microcontroller Library * Copyright (c) 2018 ARM Limited * * 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 MBED_QSPIF_BLOCK_DEVICE_H #define MBED_QSPIF_BLOCK_DEVICE_H #include "QSPI.h" #include "BlockDevice.h" namespace mbed { /** Enum qspif standard error codes * * @enum qspif_bd_error */ enum qspif_bd_error { QSPIF_BD_ERROR_OK = 0, /*!< no error */ QSPIF_BD_ERROR_DEVICE_ERROR = BD_ERROR_DEVICE_ERROR, /*!< device specific error -4001 */ QSPIF_BD_ERROR_PARSING_FAILED = -4002, /* SFDP Parsing failed */ QSPIF_BD_ERROR_READY_FAILED = -4003, /* Wait for Mem Ready failed */ QSPIF_BD_ERROR_WREN_FAILED = -4004, /* Write Enable Failed */ QSPIF_BD_ERROR_DEVICE_NOT_UNIQE = -4005, /* Only one instance per csel is allowed */ QSPIF_BD_ERROR_DEVICE_MAX_EXCEED = -4006 /* Max active QSPIF devices exceeded */ }; /** Enum qspif polarity mode * * @enum qspif_polarity_mode */ enum qspif_polarity_mode { QSPIF_POLARITY_MODE_0 = 0, /* CPOL=0, CPHA=0 */ QSPIF_POLARITY_MODE_1 /* CPOL=1, CPHA=1 */ }; #define QSPIF_MAX_REGIONS 10 #define MAX_NUM_OF_ERASE_TYPES 4 #define QSPIF_MAX_ACTIVE_FLASH_DEVICES 10 class QSPIFBlockDevice : public BlockDevice { public: /** Create QSPIFBlockDevice - An SFDP based Flash Block Device over QSPI bus * * @param io0 1st IO pin used for sending/receiving data during data phase of a transaction * @param io1 2nd IO pin used for sending/receiving data during data phase of a transaction * @param io2 3rd IO pin used for sending/receiving data during data phase of a transaction * @param io3 4th IO pin used for sending/receiving data during data phase of a transaction * @param sclk QSPI Clock pin * @param csel QSPI chip select pin * @param clock_mode specifies the QSPI Clock Polarity mode (QSPIF_POLARITY_MODE_0/QSPIF_POLARITY_MODE_1) * default value = 0 * @param freq Clock frequency of the QSPI bus (defaults to 40MHz) * */ QSPIFBlockDevice(PinName io0, PinName io1, PinName io2, PinName io3, PinName sclk, PinName csel, qspif_polarity_mode clock_mode, int freq = 40000000); /** Initialize a block device * * @return QSPIF_BD_ERROR_OK(0) - success * QSPIF_BD_ERROR_DEVICE_ERROR - device driver transaction failed * QSPIF_BD_ERROR_READY_FAILED - Waiting for Memory ready failed or timedout * QSPIF_BD_ERROR_PARSING_FAILED - unexpected format or values in one of the SFDP tables */ virtual int init(); /** Deinitialize a block device * * @return QSPIF_BD_ERROR_OK(0) - success * QSPIF_BD_ERROR_DEVICE_ERROR - device driver transaction failed */ virtual int deinit(); /** Desctruct QSPIFBlockDevie */ ~QSPIFBlockDevice() {deinit();} /** Read blocks from a block device * * @param buffer Buffer to write blocks to * @param addr Address of block to begin reading from * @param size Size to read in bytes, must be a multiple of read block size * @return QSPIF_BD_ERROR_OK(0) - success * QSPIF_BD_ERROR_DEVICE_ERROR - device driver transaction failed */ virtual int read(void *buffer, bd_addr_t addr, bd_size_t size); /** Program blocks to a block device * * The blocks must have been erased prior to being programmed * * @param buffer Buffer of data to write to blocks * @param addr Address of block to begin writing to * @param size Size to write in bytes, must be a multiple of program block size * @return QSPIF_BD_ERROR_OK(0) - success * QSPIF_BD_ERROR_DEVICE_ERROR - device driver transaction failed * QSPIF_BD_ERROR_READY_FAILED - Waiting for Memory ready failed or timed out * QSPIF_BD_ERROR_WREN_FAILED - Write Enable failed * QSPIF_BD_ERROR_PARSING_FAILED - unexpected format or values in one of the SFDP tables */ virtual int program(const void *buffer, bd_addr_t addr, bd_size_t size); /** Erase blocks on a block device * * The state of an erased block is undefined until it has been programmed * * @param addr Address of block to begin erasing * @param size Size to erase in bytes, must be a multiple of erase block size * @return QSPIF_BD_ERROR_OK(0) - success * QSPIF_BD_ERROR_DEVICE_ERROR - device driver transaction failed * QSPIF_BD_ERROR_READY_FAILED - Waiting for Memory ready failed or timed out * QSPIF_BD_ERROR_WREN_FAILED - Write Enable failed * QSPIF_BD_ERROR_PARSING_FAILED - unexpected format or values in one of the SFDP tables */ virtual int erase(bd_addr_t addr, bd_size_t size); /** Get the size of a readable block * * @return Size of a readable block in bytes */ virtual bd_size_t get_read_size() const; /** Get the size of a programable block * * @return Size of a program block size in bytes * @note Must be a multiple of the read size */ virtual bd_size_t get_program_size() const; /** Get the size of a eraseable block * * @return Size of a minimal erase block, common to all regions, in bytes * @note Must be a multiple of the program size */ virtual bd_size_t get_erase_size() const; /** Get the size of minimal eraseable sector size of given address * * @param addr Any address within block queried for erase sector size (can be any address within flash size offset) * @return Size of minimal erase sector size, in given address region, in bytes * @note Must be a multiple of the program size */ virtual bd_size_t get_erase_size(bd_addr_t addr); /** Get the total size of the underlying device * * @return Size of the underlying device in bytes */ virtual bd_size_t size() const; private: // Internal functions /********************************/ /* Different Device Csel Mgmt */ /********************************/ // Add a new QSPI device CS to existing devices list. // Only one QSPIFBlockDevice instance per CS is allowed int add_new_csel_instance(PinName csel); // Remove device CS from existing device list upon destroying object (last deinit is called) int remove_csel_instance(PinName csel); /********************************/ /* Calls to QSPI Driver APIs */ /********************************/ // Send Program => Write command to Driver qspi_status_t _qspi_send_program_command(unsigned int prog_instruction, const void *buffer, bd_addr_t addr, bd_size_t *size); // Send Read command to Driver qspi_status_t _qspi_send_read_command(unsigned int read_instruction, void *buffer, bd_addr_t addr, bd_size_t size); // Send Erase Instruction using command_transfer command to Driver qspi_status_t _qspi_send_erase_command(unsigned int erase_instruction, bd_addr_t addr, bd_size_t size); // Send Generic command_transfer command to Driver qspi_status_t _qspi_send_general_command(unsigned int instruction_int, bd_addr_t addr, const char *tx_buffer, size_t tx_length, const char *rx_buffer, size_t rx_length); // Send Bus configure_format command to Driver qspi_status_t _qspi_configure_format(qspi_bus_width_t inst_width, qspi_bus_width_t address_width, qspi_address_size_t address_size, qspi_bus_width_t alt_width, qspi_alt_size_t alt_size, qspi_bus_width_t data_width, int dummy_cycles); // Send set_frequency command to Driver qspi_status_t _qspi_set_frequency(int freq); /********************************/ // Soft Reset Flash Memory int _reset_flash_mem(); // Configure Write Enable in Status Register int _set_write_enable(); // Wait on status register until write not-in-progress bool _is_mem_ready(); /* SFDP Detection and Parsing Functions */ /****************************************/ // Parse SFDP Headers and retrieve Basic Param and Sector Map Tables (if exist) int _sfdp_parse_sfdp_headers(uint32_t& basic_table_addr, size_t& basic_table_size, uint32_t& sector_map_table_addr, size_t& sector_map_table_size); // Parse and Detect required Basic Parameters from Table int _sfdp_parse_basic_param_table(uint32_t basic_table_addr, size_t basic_table_size); // Parse and read information required by Regions Secotr Map int _sfdp_parse_sector_map_table(uint32_t sector_map_table_addr, size_t sector_map_table_size); // Detect fastest read Bus mode supported by device int _sfdp_detect_best_bus_read_mode(uint8_t *basic_param_table_ptr, int basic_param_table_size, bool& set_quad_enable, bool& is_qpi_mode, unsigned int& read_inst); // Enable Quad mode if supported (1-1-4, 1-4-4, 4-4-4 bus modes) int _sfdp_set_quad_enabled(uint8_t *basic_param_table_ptr); // Enable QPI mode (4-4-4) is supported int _sfdp_set_qpi_enabled(uint8_t *basic_param_table_ptr); // Set Page size for program int _sfdp_detect_page_size(uint8_t *basic_param_table_ptr, int basic_param_table_size); // Detect all supported erase types int _sfdp_detect_erase_types_inst_and_size(uint8_t *basic_param_table_ptr, int basic_param_table_size, unsigned int& erase4k_inst, unsigned int *erase_type_inst_arr, unsigned int *erase_type_size_arr); /* Utilities Functions */ /***********************/ // Find the region to which the given offset belong to int _utils_find_addr_region(bd_size_t offset); // Iterate on all supported Erase Types of the Region to which the offset belong to. // Iterates from highest type to lowest int _utils_iterate_next_largest_erase_type(uint8_t& bitfield, int size, int offset, int boundry); private: // Internal Members // QSPI Driver Object QSPI _qspi; // Static List of different QSPI based Flash devices csel that already exist // Each QSPI Flash device csel can have only 1 QSPIFBlockDevice instance // _devices_mutex is used to lock csel list - only one QSPIFBlockDevice instance per csel is allowed static SingletonPtr _devices_mutex; static int _number_of_active_qspif_flash_csel; static PinName *_active_qspif_flash_csel_arr; int _unique_device_status; PinName _csel; // Mutex is used to protect Flash device for some QSPI Driver commands that must be done sequentially with no other commands in between // e.g. (1)Set Write Enable, (2)Program, (3)Wait Memory Ready PlatformMutex _mutex; // Command Instructions unsigned int _read_instruction; unsigned int _prog_instruction; unsigned int _erase_instruction; unsigned int _erase4k_inst; // Legacy 4K erase instruction (default 0x20h) // Up To 4 Erase Types are supported by SFDP (each with its own command Instruction and Size) unsigned int _erase_type_inst_arr[MAX_NUM_OF_ERASE_TYPES]; unsigned int _erase_type_size_arr[MAX_NUM_OF_ERASE_TYPES]; // Sector Regions Map int _regions_count; //number of regions int _region_size_bytes[QSPIF_MAX_REGIONS]; //regions size in bytes bd_size_t _region_high_boundary[QSPIF_MAX_REGIONS]; //region high address offset boundary //Each Region can support a bit combination of any of the 4 Erase Types uint8_t _region_erase_types_bitfield[QSPIF_MAX_REGIONS]; unsigned int _min_common_erase_size; // minimal common erase size for all regions (0 if none exists) unsigned int _page_size_bytes; // Page size - 256 Bytes default int _freq; bd_size_t _device_size_bytes; // Bus speed configuration qspi_bus_width_t _inst_width; //Bus width for Instruction phase qspi_bus_width_t _address_width; //Bus width for Address phase qspi_address_size_t _address_size; // number of bytes for address qspi_bus_width_t _data_width; //Bus width for Data phase int _dummy_and_mode_cycles; // Number of Dummy and Mode Bits required by Current Bus Mode uint32_t _init_ref_count; bool _is_initialized; }; } //namespace mbed #endif