1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
12 #define SOUND_BITS_IN_BYTE 8
14 int sound_setup(struct udevice *dev)
16 struct sound_ops *ops = sound_get_ops(dev);
21 return ops->setup(dev);
24 int sound_play(struct udevice *dev, void *data, uint data_size)
26 struct sound_ops *ops = sound_get_ops(dev);
31 return ops->play(dev, data, data_size);
34 int sound_beep(struct udevice *dev, int msecs, int frequency_hz)
36 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
37 struct i2s_uc_priv *i2s_uc_priv = dev_get_uclass_priv(uc_priv->i2s);
42 ret = sound_setup(dev);
43 if (ret && ret != -EALREADY)
46 /* Buffer length computation */
47 data_size = i2s_uc_priv->samplingrate * i2s_uc_priv->channels;
48 data_size *= (i2s_uc_priv->bitspersample / SOUND_BITS_IN_BYTE);
49 data = malloc(data_size);
51 debug("%s: malloc failed\n", __func__);
55 sound_create_square_wave(i2s_uc_priv->samplingrate, data, data_size,
56 frequency_hz, i2s_uc_priv->channels);
58 while (msecs >= 1000) {
59 ret = sound_play(dev, data, data_size);
64 (data_size * msecs) / (sizeof(int) * 1000);
66 ret = sound_play(dev, data, size);
74 int sound_find_codec_i2s(struct udevice *dev)
76 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
77 struct ofnode_phandle_args args;
82 node = ofnode_find_subnode(dev_ofnode(dev), "codec");
83 if (!ofnode_valid(node)) {
84 debug("Failed to find /cpu subnode\n");
87 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
88 "#sound-dai-cells", 0, 0, &args);
90 debug("Cannot find phandle: %d\n", ret);
93 ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
96 debug("Cannot find codec: %d\n", ret);
101 node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
102 if (!ofnode_valid(node)) {
103 debug("Failed to find /cpu subnode\n");
106 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
107 "#sound-dai-cells", 0, 0, &args);
109 debug("Cannot find phandle: %d\n", ret);
112 ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
114 debug("Cannot find i2s: %d\n", ret);
117 debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
118 uc_priv->codec->name, uc_priv->i2s->name);
123 UCLASS_DRIVER(sound) = {
126 .per_device_auto_alloc_size = sizeof(struct sound_uc_priv),