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__ */ 49