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/************************************************************************************
* configs/sama5d3x-ek/src/sam_i2schar.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 <sys/types.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/audio/i2s.h>
#include "sam_ssc.h"
#include "sama5d3x-ek.h"
#if defined(CONFIG_AUDIO_I2SCHAR) && \
(defined(CONFIG_SAMA5_SSC0) || defined(CONFIG_SAMA5_SSC1))
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
#ifndef CONFIG_SAMA5D3xEK_SSC_PORT
# if defined(CONFIG_SAMA5_SSC0)
# define CONFIG_SAMA5D3xEK_SSC_PORT 0
# elif defined(CONFIG_SAMA5_SSC1)
# define CONFIG_SAMA5D3xEK_SSC_PORT 1
# endif
#endif
#ifndef CONFIG_SAMA5D3xEK_I2SCHAR_MINOR
# define CONFIG_SAMA5D3xEK_I2SCHAR_MINOR 0
#endif
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: i2schar_devinit
*
* Description:
* All architectures must provide the following interface in order to work with
* apps/examples/i2schar.
*
************************************************************************************/
int i2schar_devinit(void)
{
static bool initialized = false;
struct i2s_dev_s *i2s;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* Call sam_ssc_initialize() to get an instance of the SSC/I2S interface */
i2s = sam_ssc_initialize(CONFIG_SAMA5D3xEK_SSC_PORT);
if (!i2s)
{
dbg("ERROR: Failed to get the SAMA5 SSC/I2S driver for SSC%d\n",
CONFIG_SAMA5D3xEK_SSC_PORT);
return -ENODEV;
}
/* Register the I2S character driver at "/dev/i2schar0" */
ret = i2schar_register(i2s, CONFIG_SAMA5D3xEK_I2SCHAR_MINOR);
if (ret < 0)
{
adbg("ERROR: i2schar_register failed: %d\n", ret);
return ret;
}
/* Now we are initialized */
initialized = true;
}
return OK;
}
#endif /* CONFIG_AUDIO_I2SCHAR && (CONFIG_SAMA5_SSC0 || CONFIG_SAMA5_SSC1) */
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