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dm: sound: Create a uclass for audio codecs

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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>
This commit is contained in:
Simon Glass 2018-12-10 10:37:33 -07:00
parent 45863db5a9
commit ce6d99a056
9 changed files with 182 additions and 1 deletions
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48
include/audio_codec.h Normal file
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2018 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef __AUDIO_CODEC_H__
#define __AUDIO_CODEC_H__
/*
* An audio codec turns digital data into sound with various parameters to
* control its operation.
*/
/* Operations for sound */
struct audio_codec_ops {
/**
* set_params() - Set audio codec parameters
*
* @dev: Sound device
* @inteface: Interface number to use on codec
* @rate: Sampling rate in Hz
* @mclk_freq: Codec clock frequency in Hz
* @bits_per_sample: Must be 16 or 24
* @channels: Number of channels to use (1=mono, 2=stereo)
* @return 0 if OK, -ve on error
*/
int (*set_params)(struct udevice *dev, int interface, int rate,
int mclk_freq, int bits_per_sample, uint channels);
};
#define audio_codec_get_ops(dev) ((struct audio_codec_ops *)(dev)->driver->ops)
/**
* audio_codec_set_params() - Set audio codec parameters
*
* @dev: Sound device
* @inteface: Interface number to use on codec
* @rate: Sampling rate in Hz
* @mclk_freq: Codec clock frequency in Hz
* @bits_per_sample: Must be 16 or 24
* @channels: Number of channels to use (1=mono, 2=stereo)
* @return 0 if OK, -ve on error
*/
int audio_codec_set_params(struct udevice *dev, int interface, int rate,
int mclk_freq, int bits_per_sample, uint channels);
#endif /* __AUDIO_CODEC_H__ */