115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/****************************************************************************
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* boards/arm/samd2l2/samd20-xplained/src/sam_mmcsd.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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_config.h"
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#include "sam_spi.h"
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#include "samd20-xplained.h"
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#ifdef CONFIG_SAMD20_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 SAMD2L2_HAVE_SPI0
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# error SERCOM0 SPI support is required
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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 SAMD2L2_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_SAMD20_XPLAINED_IOMODULE=y,
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* - CONFIG_DISABLE_MOUNTPOINT=n,
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* - CONFIG_MMCSD=y, and
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* - SAMD2L2_HAVE_SPI0=y
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* (CONFIG_SAMD2L2_SERCOM0 && CONFIG_SAMD2L2_SERCOM0_ISSPI)
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*
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****************************************************************************/
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int sam_sdinitialize(int port, int minor)
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{
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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 SERCOM SPI%d\n", port);
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spi = sam_spibus_initialize(port);
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if (!spi)
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{
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ferr("ERROR: Failed to initialize SPI%d\n", port);
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return -ENODEV;
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}
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finfo("Successfully initialized SPI%d\n", port);
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/* Bind the SPI device for the chip select to the slot */
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finfo("Binding SPI%d to MMC/SD slot %d\n", port, SAMD2L2_MMCSDSLOTNO);
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ret = mmcsd_spislotinitialize(minor, SAMD2L2_MMCSDSLOTNO, spi);
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if (ret < 0)
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{
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ferr("ERROR: Failed to bind SPI%d to MMC/SD slot %d: %d\n",
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port, SAMD2L2_MMCSDSLOTNO, ret);
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return ret;
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}
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finfo("Successfully bound SPI%d to MMC/SD slot %d\n",
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port, SAMD2L2_MMCSDSLOTNO);
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return OK;
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}
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#endif /* CONFIG_SAMD20_XPLAINED_IOMODULE */
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