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 #include <linux/types.h> 11 12 struct udevice; 13 14 /* 15 * An audio codec turns digital data into sound with various parameters to 16 * control its operation. 17 */ 18 19 /* Operations for sound */ 20 struct audio_codec_ops { 21 /** 22 * set_params() - Set audio codec parameters 23 * 24 * @dev: Sound device 25 * @inteface: Interface number to use on codec 26 * @rate: Sampling rate in Hz 27 * @mclk_freq: Codec clock frequency in Hz 28 * @bits_per_sample: Must be 16 or 24 29 * @channels: Number of channels to use (1=mono, 2=stereo) 30 * @return 0 if OK, -ve on error 31 */ 32 int (*set_params)(struct udevice *dev, int interface, int rate, 33 int mclk_freq, int bits_per_sample, uint channels); 34 }; 35 36 #define audio_codec_get_ops(dev) ((struct audio_codec_ops *)(dev)->driver->ops) 37 38 /** 39 * audio_codec_set_params() - Set audio codec parameters 40 * 41 * @dev: Sound device 42 * @inteface: Interface number to use on codec 43 * @rate: Sampling rate in Hz 44 * @mclk_freq: Codec clock frequency in Hz 45 * @bits_per_sample: Must be 16 or 24 46 * @channels: Number of channels to use (1=mono, 2=stereo) 47 * Return: 0 if OK, -ve on error 48 */ 49 int audio_codec_set_params(struct udevice *dev, int interface, int rate, 50 int mclk_freq, int bits_per_sample, uint channels); 51 52 #endif /* __AUDIO_CODEC_H__ */ 53