nuttx/boards/arm/stm32l4/nucleo-l432kc/src/stm32_at45db.c

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/****************************************************************************
* boards/arm/stm32l4/nucleo-l432kc/src/stm32_at45db.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/spi/spi.h>
#include <nuttx/mtd/mtd.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/nxffs.h>
#include "stm32l4_spi.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_STM32L4_SPI1
# error "AT45DB driver requires CONFIG_STM32_SPI1 to be enabled"
#endif
/****************************************************************************
* Private Definitions
****************************************************************************/
static const int AT45DB_SPI_PORT = 1; /* AT45DB is connected to SPI1 port */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_at45dbinitialize
*
* Description:
* Initialize and configure the AT45DB SPI Serial Flash Memory
*
****************************************************************************/
int stm32_at45dbinitialize(int minor)
{
struct spi_dev_s *spi;
struct mtd_dev_s *mtd;
static bool initialized = false;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* No.. Get the SPI bus driver */
finfo("INFO: Initializing AT45DB\n");
spi = stm32l4_spibus_initialize(AT45DB_SPI_PORT);
if (spi == NULL)
{
ferr("ERROR: Failed to initialize SPI port %d\n", AT45DB_SPI_PORT);
return -ENODEV;
}
mtd = at45db_initialize(spi);
if (mtd == NULL)
{
ferr("ERROR: Failed to initialize AT45DB\n");
return -ENODEV;
}
#if defined(CONFIG_FS_NXFFS)
/* Initialize to provide NXFFS on the MTD interface */
finfo("Initialize the NXFFS file system\n");
ret = nxffs_initialize(mtd);
if (ret < 0)
{
ferr("ERROR: NXFFS initialization failed: %d\n", ret);
return ret;
}
/* Mount the file system at /mnt/at45db */
finfo("Mount the NXFFS file system at /dev/at45db\n");
ret = nx_mount(NULL, "/mnt/at45db", "nxffs", 0, NULL);
if (ret < 0)
{
ferr("ERROR: Failed to mount the NXFFS volume: %d\n", ret);
return ret;
}
#endif
/* Now we are initialized */
initialized = true;
}
return OK;
}