nuttx/configs/cloudctrl/src/up_w25.c

/****************************************************************************
 * config/cloudctrl/src/up_w25.c
 * arch/arm/src/board/up_w25.c
 *
 *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *           Darcy Gong <darcy.gong@gmail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/mount.h>

#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <debug.h>

#ifdef CONFIG_STM32_SPI1
#  include <nuttx/spi/spi.h>
#  include <nuttx/mtd/mtd.h>
#  include <nuttx/fs/nxffs.h>
#endif

#include "cloudctrl-internal.h"

/****************************************************************************
 * Pre-Processor Definitions
 ****************************************************************************/

/* Configuration ************************************************************/
/* Can't support the W25 device if it SPI1 or W25 support is not enabled */

#define HAVE_W25  1
#if !defined(CONFIG_STM32_SPI1) || !defined(CONFIG_MTD_W25)
#  undef HAVE_W25
#endif

/* Can't support W25 features if mountpoints are disabled */

#if defined(CONFIG_DISABLE_MOUNTPOINT)
#  undef HAVE_W25
#endif

/* Can't support both FAT and NXFFS */

#if defined(CONFIG_FS_FAT) && defined(CONFIG_FS_NXFFS)
#  warning "Can't support both FAT and NXFFS -- using FAT"
#endif

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: stm32_w25initialize
 *
 * Description:
 *   Initialize and register the W25 FLASH file system.
 *
 ****************************************************************************/

int stm32_w25initialize(int minor)
{
#ifdef HAVE_W25
  FAR struct spi_dev_s *spi;
  FAR struct mtd_dev_s *mtd;
#ifdef CONFIG_FS_NXFFS
  char devname[12];
#endif
  int ret;

  /* Get the SPI port */

  spi = up_spiinitialize(1);
  if (!spi)
    {
      fdbg("ERROR: Failed to initialize SPI port 2\n");
      return -ENODEV;
    }

  /* Now bind the SPI interface to the W25 SPI FLASH driver */

  mtd = w25_initialize(spi);
  if (!mtd)
    {
      fdbg("ERROR: Failed to bind SPI port 2 to the SST 25 FLASH driver\n");
      return -ENODEV;
    }

#ifndef CONFIG_FS_NXFFS
  /* And finally, use the FTL layer to wrap the MTD driver as a block driver */

  ret = ftl_initialize(minor, mtd);
  if (ret < 0)
    {
      fdbg("ERROR: Initialize the FTL layer\n");
      return ret;
    }
#else
  /* Initialize to provide NXFFS on the MTD interface */

  ret = nxffs_initialize(mtd);
  if (ret < 0)
    {
      fdbg("ERROR: NXFFS initialization failed: %d\n", -ret);
      return ret;
    }

  /* Mount the file system at /mnt/w25 */

  snprintf(devname, 12, "/mnt/w25%c", 'a' + minor);
  ret = mount(NULL, devname, "nxffs", 0, NULL);
  if (ret < 0)
    {
      fdbg("ERROR: Failed to mount the NXFFS volume: %d\n", errno);
      return ret;
    }
#endif
#endif
  return OK;
}