diff options
| author | Simon Glass <sjg@chromium.org> | 2018-12-10 20:37:33 +0300 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2018-12-14 02:32:49 +0300 |
| commit | ce6d99a056ebc9ad329521ca3660f6cb298a7666 (patch) | |
| tree | e297e74248dba6d54656e7899a4bd0e134c1dd9d /include | |
| parent | 45863db5a97360b6843a0488621342819e9a6e62 (diff) | |
| download | u-boot-ce6d99a056ebc9ad329521ca3660f6cb298a7666.tar.xz | |
dm: sound: Create a uclass for audio codecs
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/audio_codec.h | 48 | ||||
| -rw-r--r-- | include/dm/uclass-id.h | 1 |
2 files changed, 49 insertions, 0 deletions
diff --git a/include/audio_codec.h b/include/audio_codec.h new file mode 100644 index 0000000000..2587099546 --- /dev/null +++ b/include/audio_codec.h @@ -0,0 +1,48 @@ +/* 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__ */ diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index e960e48b85..c3c18356ab 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -29,6 +29,7 @@ enum uclass_id { /* U-Boot uclasses start here - in alphabetical order */ UCLASS_ADC, /* Analog-to-digital converter */ UCLASS_AHCI, /* SATA disk controller */ + UCLASS_AUDIO_CODEC, /* Audio codec with control and data path */ UCLASS_AXI, /* AXI bus */ UCLASS_BLK, /* Block device */ UCLASS_BOARD, /* Device information from hardware */ |