115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
/****************************************************************************
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* boards/xtensa/esp32/common/src/esp32_board_i2sdev.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/audio/audio.h>
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#include <nuttx/audio/audio_i2s.h>
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#include <nuttx/audio/i2s.h>
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#include <nuttx/audio/pcm.h>
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#include <arch/board/board.h>
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#include "esp32_i2s.h"
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#if defined CONFIG_ESP32_I2S0 && !defined CONFIG_AUDIO_CS4344 || \
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defined CONFIG_ESP32_I2S1
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: board_i2sdev_initialize
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*
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* Description:
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* This function is called by platform-specific, setup logic to configure
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* and register the generic I2S audio driver. This function will register
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* the driver as /dev/audio/pcm[x] where x is determined by the I2S port
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* number.
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*
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* Input Parameters:
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* port - The I2S port used for the device
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*
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* Returned Value:
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* Zero is returned on success. Otherwise, a negated errno value is
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* returned to indicate the nature of the failure.
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*
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****************************************************************************/
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int board_i2sdev_initialize(int port)
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{
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struct audio_lowerhalf_s *audio_i2s;
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struct audio_lowerhalf_s *pcm;
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struct i2s_dev_s *i2s;
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char devname[12];
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int ret;
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ainfo("Initializing I2S\n");
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i2s = esp32_i2sbus_initialize(port);
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#ifdef CONFIG_AUDIO_I2SCHAR
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ret = i2schar_register(i2s, 0);
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if (ret < 0)
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{
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aerr("ERROR: i2schar_register failed: %d\n", ret);
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return ret;
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}
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#endif
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audio_i2s = audio_i2s_initialize(i2s, true);
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if (!audio_i2s)
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{
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auderr("ERROR: Failed to initialize I2S\n");
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return -ENODEV;
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}
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pcm = pcm_decode_initialize(audio_i2s);
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if (!pcm)
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{
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auderr("ERROR: Failed create the PCM decoder\n");
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return -ENODEV;
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}
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snprintf(devname, 12, "pcm%d", port);
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ret = audio_register(devname, pcm);
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if (ret < 0)
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{
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auderr("ERROR: Failed to register /dev/%s device: %d\n", devname, ret);
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}
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return ret;
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}
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#endif /* CONFIG_ESP32_I2S0 && !CONFIG_AUDIO_CS4344 || CONFIG_ESP32_I2S1 */
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