125 lines
4.3 KiB
C
125 lines
4.3 KiB
C
/************************************************************************************
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* configs/sama5d3x-ek/src/sam_i2schar.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 <sys/types.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/audio/i2s.h>
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#include "sam_ssc.h"
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#include "sama5d3x-ek.h"
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#if defined(CONFIG_AUDIO_I2SCHAR) && \
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(defined(CONFIG_SAMA5_SSC0) || defined(CONFIG_SAMA5_SSC1))
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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#ifndef CONFIG_SAMA5D3X_EK_SSC_PORT
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# if defined(CONFIG_SAMA5_SSC0)
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# define CONFIG_SAMA5D3X_EK_SSC_PORT 0
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# elif defined(CONFIG_SAMA5_SSC1)
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# define CONFIG_SAMA5D3X_EK_SSC_PORT 1
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# endif
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#endif
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#ifndef CONFIG_SAMA5D3X_EK_I2SCHAR_MINOR
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# define CONFIG_SAMA5D3X_EK_I2SCHAR_MINOR 0
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#endif
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: i2schar_devinit
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*
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* Description:
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* All architectures must provide the following interface in order to work with
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* apps/examples/i2schar.
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*
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************************************************************************************/
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int i2schar_devinit(void)
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{
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static bool initialized = false;
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struct i2s_dev_s *i2s;
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int ret;
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/* Have we already initialized? */
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if (!initialized)
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{
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/* Call sam_ssc_initialize() to get an instance of the SSC/I2S interface */
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i2s = sam_ssc_initialize(CONFIG_SAMA5D3X_EK_SSC_PORT);
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if (!i2s)
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{
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dbg("ERROR: Failed to get the SAMA5 SSC/I2S driver for SSC%d\n",
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CONFIG_SAMA5D3X_EK_SSC_PORT);
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return -ENODEV;
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}
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/* Register the I2S character driver at "/dev/i2schar0" */
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ret = i2schar_register(i2s, CONFIG_SAMA5D3X_EK_I2SCHAR_MINOR);
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if (ret < 0)
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{
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adbg("ERROR: i2schar_register failed: %d\n", ret);
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return ret;
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}
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/* Now we are initialized */
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initialized = true;
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}
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return OK;
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}
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#endif /* CONFIG_AUDIO_I2SCHAR && (CONFIG_SAMA5_SSC0 || CONFIG_SAMA5_SSC1) */
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