/****************************************************************************
* config/sam4e-ek/src/sam_at25.c
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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>
#include <nuttx/spi/spi.h>
#include <nuttx/mtd/mtd.h>
#include <nuttx/fs/nxffs.h>
#include "sam_spi.h"
#include "sam4e-ek.h"
#ifdef HAVE_AT25
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_at25_automount
*
* Description:
* Initialize, configure, and mount the AT25 serial FLASH. The FLASH will
* be mounted at /dev/at25.
*
****************************************************************************/
int sam_at25_automount(int minor)
{
FAR struct spi_dev_s *spi;
FAR struct mtd_dev_s *mtd;
static bool initialized = false;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* No.. Get the SPI port driver */
spi = up_spiinitialize(FLASH_CSNUM);
if (!spi)
{
fdbg("ERROR: Failed to initialize SPI port %d\n", FLASH_CSNUM);
return -ENODEV;
}
/* Now bind the SPI interface to the AT25 SPI FLASH driver */
mtd = at25_initialize(spi);
if (!mtd)
{
fdbg("ERROR: Failed to bind SPI port %d to the AT25 FLASH driver\n");
return -ENODEV;
}
#if defined(CONFIG_SAM4EEK_AT25_FTL)
/* And finally, use the FTL layer to wrap the MTD driver as a block
* driver at /dev/mtdblockN, where N=minor device number.
*/
ret = ftl_initialize(minor, mtd);
if (ret < 0)
{
fdbg("ERROR: Failed to initialize the FTL layer: %d\n", ret);
return ret;
}
#elif defined(CONFIG_SAM4EEK_AT25_NXFFS)
/* 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/at25 */
ret = mount(NULL, "/mnt/at25", "nxffs", 0, NULL);
if (ret < 0)
{
fdbg("ERROR: Failed to mount the NXFFS volume: %d\n", errno);
return ret;
}
#endif
/* Now we are initialized */
initialized = true;
}
return OK;
}
#endif /* HAVE_AT25 */
