circuitpython/ports/mimxrt/hal/flexspi_nor_flash.c

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/*
* Based largely on examples provided by NXP:
*
* Copyright (c) 2016, Freescale Semiconductor, Inc.
* Copyright 2016-2020 NXP
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
* Port-specific extensions and adaptions:
*
* The MIT License (MIT)
* This file is part of the MicroPython project, http://micropython.org/
*
* Copyright (c) 2021 Damien P. George
* Copyright (c) 2021 Philipp Ebensberger
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <assert.h>
#include "fsl_common.h"
#include "flexspi_nor_flash.h"
void flexspi_nor_reset(FLEXSPI_Type *base) __attribute__((section(".ram_functions")));
void flexspi_nor_reset(FLEXSPI_Type *base) {
// Using content of FLEXSPI_SoftwareReset directly to prevent issues when compiler does not inline function
base->MCR0 |= FLEXSPI_MCR0_SWRESET_MASK;
while (base->MCR0 & FLEXSPI_MCR0_SWRESET_MASK) {
}
}
status_t flexspi_nor_write_enable(FLEXSPI_Type *base, uint32_t baseAddr) __attribute__((section(".ram_functions")));
status_t flexspi_nor_write_enable(FLEXSPI_Type *base, uint32_t baseAddr) {
flexspi_transfer_t flashXfer;
status_t status;
/* Write neable */
flashXfer.deviceAddress = baseAddr;
flashXfer.port = kFLEXSPI_PortA1;
flashXfer.cmdType = kFLEXSPI_Command;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_WRITEENABLE;
status = FLEXSPI_TransferBlocking(base, &flashXfer);
return status;
}
status_t flexspi_nor_wait_bus_busy(FLEXSPI_Type *base) __attribute__((section(".ram_functions")));
status_t flexspi_nor_wait_bus_busy(FLEXSPI_Type *base) {
/* Wait status ready. */
bool isBusy;
uint32_t readValue;
status_t status;
flexspi_transfer_t flashXfer;
flashXfer.deviceAddress = 0;
flashXfer.port = kFLEXSPI_PortA1;
flashXfer.cmdType = kFLEXSPI_Read;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_READSTATUSREG;
flashXfer.data = &readValue;
flashXfer.dataSize = 1;
do {
status = FLEXSPI_TransferBlocking(base, &flashXfer);
if (status != kStatus_Success) {
return status;
}
if (FLASH_BUSY_STATUS_POL) {
if (readValue & (1U << FLASH_BUSY_STATUS_OFFSET)) {
isBusy = false;
} else {
isBusy = true;
}
} else {
if (readValue & (1U << FLASH_BUSY_STATUS_OFFSET)) {
isBusy = true;
} else {
isBusy = false;
}
}
} while (isBusy);
return status;
}
status_t flexspi_nor_enable_quad_mode(FLEXSPI_Type *base) __attribute__((section(".ram_functions")));
status_t flexspi_nor_enable_quad_mode(FLEXSPI_Type *base) {
flexspi_transfer_t flashXfer;
status_t status;
uint32_t writeValue = 0x40;
/* Write neable */
status = flexspi_nor_write_enable(base, 0);
if (status != kStatus_Success) {
return status;
}
/* Enable quad mode. */
flashXfer.deviceAddress = 0;
flashXfer.port = kFLEXSPI_PortA1;
flashXfer.cmdType = kFLEXSPI_Write;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_WRITESTATUSREG;
flashXfer.data = &writeValue;
flashXfer.dataSize = 1;
status = FLEXSPI_TransferBlocking(base, &flashXfer);
if (status != kStatus_Success) {
return status;
}
status = flexspi_nor_wait_bus_busy(base);
return status;
}
status_t flexspi_nor_flash_erase_sector(FLEXSPI_Type *base, uint32_t address) __attribute__((section(".ram_functions")));
status_t flexspi_nor_flash_erase_sector(FLEXSPI_Type *base, uint32_t address) {
status_t status;
flexspi_transfer_t flashXfer;
/* Write enable */
status = flexspi_nor_write_enable(base, address);
if (status != kStatus_Success) {
return status;
}
/* Erase sector */
flashXfer.deviceAddress = address;
flashXfer.port = kFLEXSPI_PortA1;
flashXfer.cmdType = kFLEXSPI_Command;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_ERASESECTOR;
status = FLEXSPI_TransferBlocking(base, &flashXfer);
if (status != kStatus_Success) {
return status;
}
status = flexspi_nor_wait_bus_busy(base);
flexspi_nor_reset(base);
return status;
}
status_t flexspi_nor_flash_page_program(FLEXSPI_Type *base, uint32_t dstAddr, const uint32_t *src, uint32_t size) __attribute__((section(".ram_functions")));
status_t flexspi_nor_flash_page_program(FLEXSPI_Type *base, uint32_t dstAddr, const uint32_t *src, uint32_t size) {
status_t status;
flexspi_transfer_t flashXfer;
/* Write enable */
status = flexspi_nor_write_enable(base, dstAddr);
if (status != kStatus_Success) {
return status;
}
/* Prepare page program command */
flashXfer.deviceAddress = dstAddr;
flashXfer.port = kFLEXSPI_PortA1;
flashXfer.cmdType = kFLEXSPI_Write;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_QUAD;
flashXfer.data = (uint32_t *)src;
flashXfer.dataSize = size;
status = FLEXSPI_TransferBlocking(base, &flashXfer);
if (status != kStatus_Success) {
return status;
}
status = flexspi_nor_wait_bus_busy(base);
flexspi_nor_reset(BOARD_FLEX_SPI);
return status;
}
status_t flexspi_nor_get_vendor_id(FLEXSPI_Type *base, uint8_t *vendorId) __attribute__((section(".ram_functions")));
status_t flexspi_nor_get_vendor_id(FLEXSPI_Type *base, uint8_t *vendorId) {
uint32_t temp;
flexspi_transfer_t flashXfer;
flashXfer.deviceAddress = 0;
flashXfer.port = kFLEXSPI_PortA1;
flashXfer.cmdType = kFLEXSPI_Read;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_READID;
flashXfer.data = &temp;
flashXfer.dataSize = 2;
status_t status = FLEXSPI_TransferBlocking(base, &flashXfer);
*vendorId = temp;
return status;
}