Mbed OS Reference | QSPIFBlockDevice.h Source File

 /* 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"
 
 /** 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_INVALID_ERASE_PARAMS  = -4005, /* Erase command not on sector aligned addresses or exceeds device size */
     QSPIF_BD_ERROR_DEVICE_NOT_UNIQE      = -4006, /* Only one instance per csel is allowed */
     QSPIF_BD_ERROR_DEVICE_MAX_EXCEED     = -4007 /* 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
 
 /** BlockDevice for SFDP based flash devices over QSPI bus
  *
  *  @code
  *  // Here's an example using QSPI flash device on DISCO_L476VG target
  *  #include "mbed.h"
  *  #include "QSPIFBlockDevice.h"
  *
  *  QSPIFBlockDevice block_device(QSPI_FLASH1_IO0, QSPI_FLASH1_IO1, QSPI_FLASH1_IO2, QSPI_FLASH1_IO3,
  *                                QSPI_FLASH1_SCK, QSPI_FLASH1_CSN, QSPIF_POLARITY_MODE_0, MBED_CONF_QSPIF_QSPI_FREQ);
  *
  *  int main()
  *  {
  *      printf("QSPI SFDP Flash Block Device example\n");
  *
  *      // Initialize the SPI flash device and print the memory layout
  *      block_device.init();
  *      bd_size_t sector_size_at_address_0 = block_device.get_erase_size(0);
  *
  *      printf("QSPIF BD size: %llu\n",         block_device.size());
  *      printf("QSPIF BD read size: %llu\n",    block_device.get_read_size());
  *      printf("QSPIF BD program size: %llu\n", block_device.get_program_size());
  *      printf("QSPIF BD erase size (at address 0): %llu\n", sector_size_at_address_0);
  *
  *      // Write "Hello World!" to the first block
  *      char *buffer = (char *) malloc(sector_size_at_address_0);
  *      sprintf(buffer, "Hello World!\n");
  *      block_device.erase(0, sector_size_at_address_0);
  *      block_device.program(buffer, 0, sector_size_at_address_0);
  *
  *      // Read back what was stored
  *      block_device.read(buffer, 0, sector_size_at_address_0);
  *      printf("%s", buffer);
  *
  *      // Deinitialize the device
  *      block_device.deinit();
  *  }
  *  @endcode
  */
 class QSPIFBlockDevice : public mbed::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,
                      int clock_mode, int freq = MBED_CONF_QSPIF_QSPI_FREQ);
 
     /** 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, mbed::bd_addr_t addr, mbed::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, mbed::bd_addr_t addr, mbed::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
      *                  QSPIF_BD_ERROR_INVALID_ERASE_PARAMS - Trying to erase unaligned address or size
      */
     virtual int erase(mbed::bd_addr_t addr, mbed::bd_size_t size);
 
     /** Get the size of a readable block
      *
      *  @return         Size of a readable block in bytes
      */
     virtual mbed::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 mbed::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 mbed::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 mbed::bd_size_t get_erase_size(mbed::bd_addr_t addr);
 
     /** Get the value of storage byte after it was erased
      *
      *  If get_erase_value returns a non-negative byte value, the underlying
      *  storage is set to that value when erased, and storage containing
      *  that value can be programmed without another erase.
      *
      *  @return         The value of storage when erased, or -1 if you can't
      *                  rely on the value of erased storage
      */
     virtual int get_erase_value() const;
 
     /** Get the total size of the underlying device
      *
      *  @return         Size of the underlying device in bytes
      */
     virtual mbed::bd_size_t size() const;
 
     /** Get the BlockDevice class type.
      *
      *  @return         A string represent the BlockDevice class type.
      */
     virtual const char *get_type() 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, mbed::bd_addr_t addr,
                                              mbed::bd_size_t *size);
 
     // Send Read command to Driver
     qspi_status_t _qspi_send_read_command(unsigned int read_instruction, void *buffer, mbed::bd_addr_t addr, mbed::bd_size_t size);
 
     // Send Erase Instruction using command_transfer command to Driver
     qspi_status_t _qspi_send_erase_command(unsigned int erase_instruction, mbed::bd_addr_t addr, mbed::bd_size_t size);
 
     // Send Generic command_transfer command to Driver
     qspi_status_t _qspi_send_general_command(unsigned int instruction_int, mbed::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);
 
     /*********************************/
     /* Flash Configuration Functions */
     /*********************************/
     // 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();
 
     // Enable Fast Mode - for flash chips with low power default
     int _enable_fast_mdoe();
 
     /****************************************/
     /* 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(mbed::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:
     // QSPI Driver Object
     mbed::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<PlatformMutex> _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)
     unsigned int _write_register_inst; // Write status/config register instruction may vary between chips
     unsigned int _read_register_inst; // Read status/config register instruction may vary between chips
 
     // 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;
 };
 
 #endif
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