1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
13 #define SOUND_BITS_IN_BYTE 8
15 int sound_setup(struct udevice *dev)
17 struct sound_ops *ops = sound_get_ops(dev);
22 return ops->setup(dev);
25 int sound_play(struct udevice *dev, void *data, uint data_size)
27 struct sound_ops *ops = sound_get_ops(dev);
32 return ops->play(dev, data, data_size);
35 int sound_stop_play(struct udevice *dev)
37 struct sound_ops *ops = sound_get_ops(dev);
42 return ops->stop_play(dev);
45 int sound_start_beep(struct udevice *dev, int frequency_hz)
47 struct sound_ops *ops = sound_get_ops(dev);
52 return ops->start_beep(dev, frequency_hz);
55 int sound_stop_beep(struct udevice *dev)
57 struct sound_ops *ops = sound_get_ops(dev);
62 return ops->stop_beep(dev);
65 int sound_beep(struct udevice *dev, int msecs, int frequency_hz)
67 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
68 struct i2s_uc_priv *i2s_uc_priv;
73 ret = sound_setup(dev);
74 if (ret && ret != -EALREADY)
77 /* Try using the beep interface if available */
78 ret = sound_start_beep(dev, frequency_hz);
83 ret = sound_stop_beep(dev);
88 /* Buffer length computation */
89 i2s_uc_priv = dev_get_uclass_priv(uc_priv->i2s);
90 data_size = i2s_uc_priv->samplingrate * i2s_uc_priv->channels;
91 data_size *= (i2s_uc_priv->bitspersample / SOUND_BITS_IN_BYTE);
92 data = malloc(data_size);
94 debug("%s: malloc failed\n", __func__);
98 sound_create_square_wave(i2s_uc_priv->samplingrate, data, data_size,
99 frequency_hz, i2s_uc_priv->channels);
102 while (msecs >= 1000) {
103 ret = sound_play(dev, data, data_size);
110 (data_size * msecs) / (sizeof(int) * 1000);
112 ret = sound_play(dev, data, size);
114 sound_stop_play(dev);
121 int sound_find_codec_i2s(struct udevice *dev)
123 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
124 struct ofnode_phandle_args args;
128 /* First the codec */
129 node = ofnode_find_subnode(dev_ofnode(dev), "codec");
130 if (!ofnode_valid(node)) {
131 debug("Failed to find /cpu subnode\n");
134 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
135 "#sound-dai-cells", 0, 0, &args);
137 debug("Cannot find phandle: %d\n", ret);
140 ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
143 debug("Cannot find codec: %d\n", ret);
148 node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
149 if (!ofnode_valid(node)) {
150 debug("Failed to find /cpu subnode\n");
153 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
154 "#sound-dai-cells", 0, 0, &args);
156 debug("Cannot find phandle: %d\n", ret);
159 ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
161 debug("Cannot find i2s: %d\n", ret);
164 debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
165 uc_priv->codec->name, uc_priv->i2s->name);
170 UCLASS_DRIVER(sound) = {
173 .per_device_auto_alloc_size = sizeof(struct sound_uc_priv),