mirror of
https://github.com/AsahiLinux/u-boot
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7b96c6c89a
Add a sound driver for samus which ties together the audio codec and I2S controller. For now broadwell_sound is commented out in the makefile since we cannot compile it without sound support enabled. The next commit fixes this. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Sound for broadwell
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*
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* Copyright 2019 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#define LOG_CATEGORY UCLASS_SOUND
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#include <common.h>
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#include <audio_codec.h>
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#include <dm.h>
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#include <i2s.h>
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#include <sound.h>
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static int broadwell_sound_probe(struct udevice *dev)
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{
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return sound_find_codec_i2s(dev);
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}
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static int broadwell_sound_setup(struct udevice *dev)
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{
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struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
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struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
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int ret;
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if (uc_priv->setup_done)
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return -EALREADY;
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ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
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i2c_priv->samplingrate,
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i2c_priv->samplingrate * i2c_priv->rfs,
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i2c_priv->bitspersample,
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i2c_priv->channels);
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if (ret)
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return ret;
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uc_priv->setup_done = true;
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return 0;
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}
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static int broadwell_sound_play(struct udevice *dev, void *data, uint data_size)
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{
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struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
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return i2s_tx_data(uc_priv->i2s, data, data_size);
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}
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static const struct sound_ops broadwell_sound_ops = {
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.setup = broadwell_sound_setup,
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.play = broadwell_sound_play,
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};
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static const struct udevice_id broadwell_sound_ids[] = {
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{ .compatible = "google,samus-sound" },
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{ }
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};
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U_BOOT_DRIVER(broadwell_sound_drv) = {
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.name = "broadwell_sound",
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.id = UCLASS_SOUND,
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.of_match = broadwell_sound_ids,
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.probe = broadwell_sound_probe,
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.ops = &broadwell_sound_ops,
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};
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