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mbed-os/components/storage/blockdevice/COMPONENT_QSPIF/QSPIFBlockDevice.h

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/* mbed Microcontroller Library
* Copyright (c) 2018 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_QSPIF_BLOCK_DEVICE_H
#define MBED_QSPIF_BLOCK_DEVICE_H
#include "drivers/QSPI.h"
#include "drivers/internal/SFDP.h"
#include "features/storage/blockdevice/BlockDevice.h"
#include "platform/Callback.h"
#ifndef MBED_CONF_QSPIF_QSPI_IO0
#define MBED_CONF_QSPIF_QSPI_IO0 NC
#endif
#ifndef MBED_CONF_QSPIF_QSPI_IO1
#define MBED_CONF_QSPIF_QSPI_IO1 NC
#endif
#ifndef MBED_CONF_QSPIF_QSPI_IO2
#define MBED_CONF_QSPIF_QSPI_IO2 NC
#endif
#ifndef MBED_CONF_QSPIF_QSPI_IO3
#define MBED_CONF_QSPIF_QSPI_IO3 NC
#endif
#ifndef MBED_CONF_QSPIF_QSPI_SCK
#define MBED_CONF_QSPIF_QSPI_SCK NC
#endif
#ifndef MBED_CONF_QSPIF_QSPI_CSN
#define MBED_CONF_QSPIF_QSPI_CSN NC
#endif
#ifndef MBED_CONF_QSPIF_QSPI_POLARITY_MODE
#define MBED_CONF_QSPIF_QSPI_POLARITY_MODE 0
#endif
#ifndef MBED_CONF_QSPIF_QSPI_FREQ
#define MBED_CONF_QSPIF_QSPI_FREQ 40000000
#endif
/** 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_UNIQUE = -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_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 = MBED_CONF_QSPIF_QSPI_IO0,
PinName io1 = MBED_CONF_QSPIF_QSPI_IO1,
PinName io2 = MBED_CONF_QSPIF_QSPI_IO2,
PinName io3 = MBED_CONF_QSPIF_QSPI_IO3,
PinName sclk = MBED_CONF_QSPIF_QSPI_SCK,
PinName csel = MBED_CONF_QSPIF_QSPI_CSN,
int clock_mode = MBED_CONF_QSPIF_QSPI_POLARITY_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:
/********************************/
/* 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(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 command to read from the SFDP table
int _qspi_send_read_sfdp_command(mbed::bd_addr_t addr, void *rx_buffer, mbed::bd_size_t rx_length);
// Read the contents of status registers 1 and 2 into a buffer (buffer must have a length of 2)
qspi_status_t _qspi_read_status_registers(uint8_t *reg_buffer);
// Set the contents of status registers 1 and 2 from a buffer (buffer must have a length of 2)
qspi_status_t _qspi_write_status_registers(uint8_t *reg_buffer);
// Send set_frequency command to Driver
qspi_status_t _qspi_set_frequency(int freq);
// Update the 4-byte addressing extension register with the MSB of the address if it is in use
qspi_status_t _qspi_update_4byte_ext_addr_reg(bd_addr_t addr);
/*********************************/
/* Flash Configuration Functions */
/*********************************/
// 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();
// Enable Fast Mode - for flash chips with low power default
int _enable_fast_mode();
// Query vendor ID and handle special behavior that isn't covered by SFDP data
int _handle_vendor_quirks();
/****************************************/
/* SFDP Detection and Parsing Functions */
/****************************************/
// Parse and Detect required Basic Parameters from Table
int _sfdp_parse_basic_param_table(mbed::Callback<int(mbed::bd_addr_t, void *, mbed::bd_size_t)> sfdp_reader,
mbed::sfdp_hdr_info &sfdp_info);
// Detect the soft reset protocol and reset - returns error if soft reset is not supported
int _sfdp_detect_reset_protocol_and_reset(uint8_t *basic_param_table_ptr);
// 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);
// 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)
int _sfdp_set_qpi_enabled(uint8_t *basic_param_table_ptr);
// Detect 4-byte addressing mode and enable it if supported
int _sfdp_detect_and_enable_4byte_addressing(uint8_t *basic_param_table_ptr, int basic_param_table_size);
private:
enum qspif_clear_protection_method_t {
QSPIF_BP_ULBPR, // Issue global protection unlock instruction
QSPIF_BP_CLEAR_SR, // Clear protection bits in status register 1
};
// 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
mbed::qspi_inst_t _read_instruction;
// Status register write/read instructions
unsigned int _num_status_registers;
mbed::qspi_inst_t _write_status_reg_2_inst;
mbed::qspi_inst_t _read_status_reg_2_inst; // If three registers, this instruction reads the latter two
// Attempt to enable 4-byte addressing. True by default, but may be disabled for some vendors
bool _attempt_4_byte_addressing;
// 4-byte addressing extension register write instruction
mbed::qspi_inst_t _4byte_msb_reg_write_inst;
// Quad mode enable status register and bit
int _quad_enable_register_idx;
int _quad_enable_bit;
bool _needs_fast_mode;
// Clear block protection
qspif_clear_protection_method_t _clear_protection_method;
// Data extracted from the devices SFDP structure
mbed::sfdp_hdr_info _sfdp_info;
unsigned int _page_size_bytes; // Page size - 256 Bytes default
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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