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/****************************************************************************
* config/shenzhou/src/sam_mmcsd.c
*
* Copyright (C) 2013 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 <stdio.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/spi.h>
#include <nuttx/mmcsd.h>
#include "sam4l-xplained.h"
#ifdef CONFIG_SAM4L_XPLAINED_IOMODULE
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifdef CONFIG_DISABLE_MOUNTPOINT
# error Mountpoints are disabled (CONFIG_DISABLE_MOUNTPOINT=y)
#endif
#ifndef CONFIG_SAM34_SPI0
# error SPI support is required (CONFIG_SAM34_SPI0)
#endif
#ifndef CONFIG_MMCSD
# error MMC/SD support is required (CONFIG_MMCSD)
#endif
#define SAM34_MMCSDSLOTNO 0 /* There is only one slot */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_sdinitialize
*
* Description:
* Initialize the SPI-based SD card. Requires
* - CONFIG_SAM4L_XPLAINED_IOMODULE=y,
* - CONFIG_DISABLE_MOUNTPOINT=n,
* - CONFIG_MMCSD=y, and
* - CONFIG_SAM34_SPI0=y
*
*****************************************************************************/
int sam_sdinitialize(int minor)
{
FAR struct spi_dev_s *spi;
int ret;
/* Get the SPI driver instance for the SD chip select */
fvdbg("Initializing SPI chip select %d\n", SD_CSNO);
spi = up_spiinitialize(SD_CSNO);
if (!spi)
{
fdbg("Failed to initialize SPI chip select %d\n", SD_CSNO);
return -ENODEV;
}
fvdbg("Successfully initialized SPI chip select %d\n", SD_CSNO);
/* Bind the SPI device for the chip select to the slot */
fvdbg("Binding SPI chip select %d to MMC/SD slot %d\n",
SD_CSNO, SAM34_MMCSDSLOTNO);
ret = mmcsd_spislotinitialize(minor, SAM34_MMCSDSLOTNO, spi);
if (ret < 0)
{
fdbg("Failed to bind SPI chip select %d to MMC/SD slot %d: %d\n",
SD_CSNO, SAM34_MMCSDSLOTNO, ret);
return ret;
}
fvdbg("Successfuly bound SPI chip select %d to MMC/SD slot %d\n",
SD_CSNO, SAM34_MMCSDSLOTNO);
return OK;
}
#endif /* CONFIG_SAM4L_XPLAINED_IOMODULE */
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