112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
/****************************************************************************
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* boards/arm/sama5/giant-board/src/sam_i2schar.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 <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 "giant-board.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_GIANT_BOARD_SSC_PORT
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# if defined(CONFIG_SAMA5_SSC0)
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# define CONFIG_GIANT_BOARD_SSC_PORT 0
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# elif defined(CONFIG_SAMA5_SSC1)
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# define CONFIG_GIANT_BOARD_SSC_PORT 1
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# endif
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#endif
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#ifndef CONFIG_GIANT_BOARD_I2SCHAR_MINOR
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# define CONFIG_GIANT_BOARD_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
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* with 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
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* interface
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*/
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i2s = sam_ssc_initialize(CONFIG_GIANT_BOARD_SSC_PORT);
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if (!i2s)
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{
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auderr("ERROR: Failed to get the SAMA5 SSC/I2S driver for SSC%d\n",
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CONFIG_GIANT_BOARD_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_GIANT_BOARD_I2SCHAR_MINOR);
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if (ret < 0)
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{
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auderr("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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