include/audio_codec.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright 2018 Google LLC
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #ifndef __AUDIO_CODEC_H__
   8 #define __AUDIO_CODEC_H__
   9
  10 /*
  11  * An audio codec turns digital data into sound with various parameters to
  12  * control its operation.
  13  */
  14
  15 /* Operations for sound */
  16 struct audio_codec_ops {
  17         /**
  18          * set_params() - Set audio codec parameters
  19          *
  20          * @dev: Sound device
  21          * @inteface: Interface number to use on codec
  22          * @rate: Sampling rate in Hz
  23          * @mclk_freq: Codec clock frequency in Hz
  24          * @bits_per_sample: Must be 16 or 24
  25          * @channels: Number of channels to use (1=mono, 2=stereo)
  26          * @return 0 if OK, -ve on error
  27          */
  28         int (*set_params)(struct udevice *dev, int interface, int rate,
  29                           int mclk_freq, int bits_per_sample, uint channels);
  30 };
  31
  32 #define audio_codec_get_ops(dev) ((struct audio_codec_ops *)(dev)->driver->ops)
  33
  34 /**
  35  * audio_codec_set_params() - Set audio codec parameters
  36  *
  37  * @dev: Sound device
  38  * @inteface: Interface number to use on codec
  39  * @rate: Sampling rate in Hz
  40  * @mclk_freq: Codec clock frequency in Hz
  41  * @bits_per_sample: Must be 16 or 24
  42  * @channels: Number of channels to use (1=mono, 2=stereo)
  43  * @return 0 if OK, -ve on error
  44  */
  45 int audio_codec_set_params(struct udevice *dev, int interface, int rate,
  46                            int mclk_freq, int bits_per_sample, uint channels);
  47
  48 #endif  /* __AUDIO_CODEC_H__ */