Mbed OS Reference | SPINANDBlockDevice.h Source File

 /* mbed Microcontroller Library
  * Copyright (c) 2021 ARM Limited
  * SPDX-License-Identifier: Apache-2.0
  *
  * 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_SPINAND_BLOCK_DEVICE_H
 #define MBED_SPINAND_BLOCK_DEVICE_H
 
 #include "drivers/QSPI.h"
 #include "blockdevice/BlockDevice.h"
 #include "platform/Callback.h"
 
 #ifndef MBED_CONF_SPINAND_QSPI_IO0
 #define MBED_CONF_SPINAND_QSPI_IO0 NC
 #endif
 #ifndef MBED_CONF_SPINAND_QSPI_IO1
 #define MBED_CONF_SPINAND_QSPI_IO1 NC
 #endif
 #ifndef MBED_CONF_SPINAND_QSPI_IO2
 #define MBED_CONF_SPINAND_QSPI_IO2 NC
 #endif
 #ifndef MBED_CONF_SPINAND_QSPI_IO3
 #define MBED_CONF_SPINAND_QSPI_IO3 NC
 #endif
 #ifndef MBED_CONF_SPINAND_QSPI_SCK
 #define MBED_CONF_SPINAND_QSPI_SCK NC
 #endif
 #ifndef MBED_CONF_SPINAND_QSPI_CSN
 #define MBED_CONF_SPINAND_QSPI_CSN NC
 #endif
 #ifndef MBED_CONF_SPINAND_QSPI_POLARITY_MODE
 #define MBED_CONF_SPINAND_QSPI_POLARITY_MODE 0
 #endif
 #ifndef MBED_CONF_SPINAND_QSPI_FREQ
 #define MBED_CONF_SPINAND_QSPI_FREQ 40000000
 #endif
 
 /** Enum spinand standard error codes
  *
  *  @enum spinand_bd_error
  */
 enum spinand_bd_error {
     SPINAND_BD_ERROR_OK                    = 0,     /*!< no error */
     SPINAND_BD_ERROR_DEVICE_ERROR          = BD_ERROR_DEVICE_ERROR, /*!< device specific error -4001 */
     SPINAND_BD_ERROR_PARSING_FAILED        = -4002, /* SFDP Parsing failed */
     SPINAND_BD_ERROR_READY_FAILED          = -4003, /* Wait for Mem Ready failed */
     SPINAND_BD_ERROR_WREN_FAILED           = -4004, /* Write Enable Failed */
     SPINAND_BD_ERROR_INVALID_ERASE_PARAMS  = -4005, /* Erase command not on sector aligned addresses or exceeds device size */
     SPINAND_BD_ERROR_DEVICE_NOT_UNIQUE     = -4006, /* Only one instance per csel is allowed */
     SPINAND_BD_ERROR_DEVICE_MAX_EXCEED     = -4007  /* Max active SPINAND devices exceeded */
 };
 
 /** Enum spinand polarity mode
  *
  *  @enum spinand_polarity_mode
  */
 enum spinand_polarity_mode {
     SPINAND_POLARITY_MODE_0 = 0, /* CPOL=0, CPHA=0 */
     SPINAND_POLARITY_MODE_1      /* CPOL=1, CPHA=1 */
 };
 
 #define SPINAND_MAX_ACTIVE_FLASH_DEVICES 10
 
 /** BlockDevice for SPI NAND flash devices over QSPI bus
  *
  *  @code
  *  // Here's an example using SPI NAND flash device on DISCO_L4R9I target
  *  #include "mbed.h"
  *  #include "SPINANDBlockDevice.h"
  *
  *  SPINANDBlockDevice block_device(SPINAND_FLASH1_IO0, SPINAND_FLASH1_IO1, SPINAND_FLASH1_IO2, SPINAND_FLASH1_IO3,
  *                                  SPINAND_FLASH1_SCK, SPINAND_FLASH1_CSN, SPINAND_POLARITY_MODE_0, MBED_CONF_SPINAND_QSPI_FREQ);
  *
  *  int main()
  *  {
  *      printf("SPI NAND Flash Block Device example\n");
  *
  *      // Initialize the SPI NAND 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("SPINAND BD size: %llu\n",         block_device.size());
  *      printf("SPINAND BD read size: %llu\n",    block_device.get_read_size());
  *      printf("SPINAND BD program size: %llu\n", block_device.get_program_size());
  *      printf("SPINAND 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 SPINANDBlockDevice : public mbed::BlockDevice {
 public:
     /** Create SPINANDBlockDevice - An SPI NAND 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 (SPINAND_POLARITY_MODE_0/SPINAND_POLARITY_MODE_1)
      *         default value = 0
      *  @param freq Clock frequency of the QSPI bus (defaults to 40MHz)
      */
     SPINANDBlockDevice(PinName io0 = MBED_CONF_SPINAND_QSPI_IO0,
                        PinName io1 = MBED_CONF_SPINAND_QSPI_IO1,
                        PinName io2 = MBED_CONF_SPINAND_QSPI_IO2,
                        PinName io3 = MBED_CONF_SPINAND_QSPI_IO3,
                        PinName sclk = MBED_CONF_SPINAND_QSPI_SCK,
                        PinName csel = MBED_CONF_SPINAND_QSPI_CSN,
                        int clock_mode = MBED_CONF_SPINAND_QSPI_POLARITY_MODE,
                        int freq = MBED_CONF_SPINAND_QSPI_FREQ);
 
     /** Initialize a block device
      *
      *  @return         SPINAND_BD_ERROR_OK(0) - success
      *                  SPINAND_BD_ERROR_DEVICE_ERROR - device driver transaction failed
      *                  SPINAND_BD_ERROR_READY_FAILED - Waiting for Memory ready failed or timedout
      */
     virtual int init();
 
     /** Deinitialize a block device
      *
      *  @return         SPINAND_BD_ERROR_OK(0) - success
      *                  SPINAND_BD_ERROR_DEVICE_ERROR - device driver transaction failed
      */
     virtual int deinit();
 
     /** Destruct SPINANDBlockDevie
       */
     ~SPINANDBlockDevice()
     {
         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         SPINAND_BD_ERROR_OK(0) - success
      *                  SPINAND_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         SPINAND_BD_ERROR_OK(0) - success
      *                  SPINAND_BD_ERROR_DEVICE_ERROR - device driver transaction failed
      *                  SPINAND_BD_ERROR_READY_FAILED - Waiting for Memory ready failed or timed out
      *                  SPINAND_BD_ERROR_WREN_FAILED - Write Enable failed
      */
     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         SPINAND_BD_ERROR_OK(0) - success
      *                  SPINAND_BD_ERROR_DEVICE_ERROR - device driver transaction failed
      *                  SPINAND_BD_ERROR_READY_FAILED - Waiting for Memory ready failed or timed out
      *                  SPINAND_BD_ERROR_WREN_FAILED - Write Enable failed
      *                  SPINAND_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;
     virtual mbed::bd_size_t get_erase_size(bd_addr_t addr) const;
 
     /** 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:
     /********************************/
     /*   Different Device Csel Mgmt */
     /********************************/
     // Add a new SPI NAND device CS to existing devices list.
     // Only one SPINANDBlockDevice 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(mbed::qspi_inst_t 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(mbed::qspi_inst_t 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(mbed::qspi_inst_t 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(mbed::qspi_inst_t instruction_int, mbed::bd_addr_t addr, const char *tx_buffer,
                                              mbed::bd_size_t tx_length, const char *rx_buffer, mbed::bd_size_t rx_length);
 
     // Send set_frequency command to Driver
     qspi_status_t _qspi_set_frequency(int freq);
 
     /*********************************/
     /* Flash Configuration Functions */
     /*********************************/
 
     // Quad Enable in Security Register
     int _set_quad_enable();
 
     // Clear the device's block protection
     int _clear_block_protection();
 
     // Configure Write Enable in Status Register
     int _set_write_enable();
 
     // Wait on status register until write not-in-progress
     bool _is_mem_ready();
 
 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 SPINANDBlockDevice instance
     // _devices_mutex is used to lock csel list - only one SPINANDBlockDevice instance per csel is allowed
     static SingletonPtr<PlatformMutex> _devices_mutex;
     static int _number_of_active_spinand_flash_csel;
     static PinName *_active_spinand_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
     mbed::qspi_inst_t _read_instruction;
     mbed::qspi_inst_t _program_instruction;
 
     int _freq;
 
     // 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 bits for address
     qspi_alt_size_t _alt_size; //Number of bits for alt
     bool _alt_enabled; //Whether alt is enabled
     uint8_t _dummy_cycles; //Number of Dummy cycles required by Current Bus Mode
     qspi_bus_width_t _data_width; //Bus width for Data phase
 
     uint32_t _init_ref_count;
     bool _is_initialized;
 };
 
 #endif
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