128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
/****************************************************************************
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* config/sam4l-xplained/src/sam_mmcsd.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/mmcsd.h>
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#include "sam_spi.h"
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#include "sam4l-xplained.h"
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#ifdef CONFIG_SAM4L_XPLAINED_IOMODULE
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifdef CONFIG_DISABLE_MOUNTPOINT
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# error Mountpoints are disabled (CONFIG_DISABLE_MOUNTPOINT=y)
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#endif
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#ifndef CONFIG_SAM34_SPI0
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# error SPI support is required (CONFIG_SAM34_SPI0)
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#endif
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#ifndef CONFIG_MMCSD
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# error MMC/SD support is required (CONFIG_MMCSD)
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#endif
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#define SAM34_MMCSDSLOTNO 0 /* There is only one slot */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_sdinitialize
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*
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* Description:
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* Initialize the SPI-based SD card. Requires
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* - CONFIG_SAM4L_XPLAINED_IOMODULE=y,
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* - CONFIG_DISABLE_MOUNTPOINT=n,
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* - CONFIG_MMCSD=y, and
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* - CONFIG_SAM34_SPI0=y
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*
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****************************************************************************/
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int sam_sdinitialize(int minor)
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{
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FAR struct spi_dev_s *spi;
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int ret;
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/* Get the SPI driver instance for the SD chip select */
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finfo("Initializing SPI chip select %d\n", SD_CSNO);
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spi = sam_spibus_initialize(SD_CSNO);
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if (!spi)
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{
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ferr("ERROR: Failed to initialize SPI chip select %d\n", SD_CSNO);
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return -ENODEV;
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}
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finfo("Successfully initialized SPI chip select %d\n", SD_CSNO);
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/* Bind the SPI device for the chip select to the slot */
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finfo("Binding SPI chip select %d to MMC/SD slot %d\n",
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SD_CSNO, SAM34_MMCSDSLOTNO);
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ret = mmcsd_spislotinitialize(minor, SAM34_MMCSDSLOTNO, spi);
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if (ret < 0)
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{
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ferr("ERROR: Failed to bind SPI chip select %d to MMC/SD slot %d: %d\n",
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SD_CSNO, SAM34_MMCSDSLOTNO, ret);
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return ret;
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}
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finfo("Successfuly bound SPI chip select %d to MMC/SD slot %d\n",
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SD_CSNO, SAM34_MMCSDSLOTNO);
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return OK;
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}
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#endif /* CONFIG_SAM4L_XPLAINED_IOMODULE */
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