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 struct udevice; 11 12 /* 13 * An audio codec turns digital data into sound with various parameters to 14 * control its operation. 15 */ 16 17 /* Operations for sound */ 18 struct audio_codec_ops { 19 /** 20 * set_params() - Set audio codec parameters 21 * 22 * @dev: Sound device 23 * @inteface: Interface number to use on codec 24 * @rate: Sampling rate in Hz 25 * @mclk_freq: Codec clock frequency in Hz 26 * @bits_per_sample: Must be 16 or 24 27 * @channels: Number of channels to use (1=mono, 2=stereo) 28 * @return 0 if OK, -ve on error 29 */ 30 int (*set_params)(struct udevice *dev, int interface, int rate, 31 int mclk_freq, int bits_per_sample, uint channels); 32 }; 33 34 #define audio_codec_get_ops(dev) ((struct audio_codec_ops *)(dev)->driver->ops) 35 36 /** 37 * audio_codec_set_params() - Set audio codec parameters 38 * 39 * @dev: Sound device 40 * @inteface: Interface number to use on codec 41 * @rate: Sampling rate in Hz 42 * @mclk_freq: Codec clock frequency in Hz 43 * @bits_per_sample: Must be 16 or 24 44 * @channels: Number of channels to use (1=mono, 2=stereo) 45 * @return 0 if OK, -ve on error 46 */ 47 int audio_codec_set_params(struct udevice *dev, int interface, int rate, 48 int mclk_freq, int bits_per_sample, uint channels); 49 50 #endif /* __AUDIO_CODEC_H__ */ 51