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ce6d99a056
An audio codec provides a way to convert digital data to sound and vice versa. Add a simple uclass which just supports setting the parameters for the codec. Signed-off-by: Simon Glass <sjg@chromium.org>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright 2018 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef __AUDIO_CODEC_H__
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#define __AUDIO_CODEC_H__
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/*
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* An audio codec turns digital data into sound with various parameters to
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* control its operation.
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*/
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/* Operations for sound */
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struct audio_codec_ops {
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/**
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* set_params() - Set audio codec parameters
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*
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* @dev: Sound device
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* @inteface: Interface number to use on codec
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* @rate: Sampling rate in Hz
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* @mclk_freq: Codec clock frequency in Hz
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* @bits_per_sample: Must be 16 or 24
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* @channels: Number of channels to use (1=mono, 2=stereo)
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* @return 0 if OK, -ve on error
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*/
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int (*set_params)(struct udevice *dev, int interface, int rate,
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int mclk_freq, int bits_per_sample, uint channels);
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};
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#define audio_codec_get_ops(dev) ((struct audio_codec_ops *)(dev)->driver->ops)
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/**
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* audio_codec_set_params() - Set audio codec parameters
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*
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* @dev: Sound device
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* @inteface: Interface number to use on codec
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* @rate: Sampling rate in Hz
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* @mclk_freq: Codec clock frequency in Hz
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* @bits_per_sample: Must be 16 or 24
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* @channels: Number of channels to use (1=mono, 2=stereo)
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* @return 0 if OK, -ve on error
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*/
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int audio_codec_set_params(struct udevice *dev, int interface, int rate,
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int mclk_freq, int bits_per_sample, uint channels);
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#endif /* __AUDIO_CODEC_H__ */
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