1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
13 #include <linux/delay.h>
15 #define SOUND_BITS_IN_BYTE 8
17 int sound_setup(struct udevice *dev)
19 struct sound_ops *ops = sound_get_ops(dev);
24 return ops->setup(dev);
27 int sound_play(struct udevice *dev, void *data, uint data_size)
29 struct sound_ops *ops = sound_get_ops(dev);
34 return ops->play(dev, data, data_size);
37 int sound_stop_play(struct udevice *dev)
39 struct sound_ops *ops = sound_get_ops(dev);
44 return ops->stop_play(dev);
47 int sound_start_beep(struct udevice *dev, int frequency_hz)
49 struct sound_ops *ops = sound_get_ops(dev);
54 return ops->start_beep(dev, frequency_hz);
57 int sound_stop_beep(struct udevice *dev)
59 struct sound_ops *ops = sound_get_ops(dev);
64 return ops->stop_beep(dev);
67 int sound_beep(struct udevice *dev, int msecs, int frequency_hz)
69 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
70 struct i2s_uc_priv *i2s_uc_priv;
75 ret = sound_setup(dev);
76 if (ret && ret != -EALREADY)
79 /* Try using the beep interface if available */
80 ret = sound_start_beep(dev, frequency_hz);
85 ret = sound_stop_beep(dev);
90 /* Buffer length computation */
91 i2s_uc_priv = dev_get_uclass_priv(uc_priv->i2s);
92 data_size = i2s_uc_priv->samplingrate * i2s_uc_priv->channels;
93 data_size *= (i2s_uc_priv->bitspersample / SOUND_BITS_IN_BYTE);
94 data = malloc(data_size);
96 debug("%s: malloc failed\n", __func__);
100 sound_create_square_wave(i2s_uc_priv->samplingrate, data, data_size,
101 frequency_hz, i2s_uc_priv->channels);
104 while (msecs >= 1000) {
105 ret = sound_play(dev, data, data_size);
112 (data_size * msecs) / (sizeof(int) * 1000);
114 ret = sound_play(dev, data, size);
116 sound_stop_play(dev);
123 int sound_find_codec_i2s(struct udevice *dev)
125 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
126 struct ofnode_phandle_args args;
130 /* First the codec */
131 node = ofnode_find_subnode(dev_ofnode(dev), "codec");
132 if (!ofnode_valid(node)) {
133 debug("Failed to find /cpu subnode\n");
136 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
137 "#sound-dai-cells", 0, 0, &args);
139 debug("Cannot find phandle: %d\n", ret);
142 ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
145 debug("Cannot find codec: %d\n", ret);
150 node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
151 if (!ofnode_valid(node)) {
152 debug("Failed to find /cpu subnode\n");
155 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
156 "#sound-dai-cells", 0, 0, &args);
158 debug("Cannot find phandle: %d\n", ret);
161 ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
163 debug("Cannot find i2s: %d\n", ret);
166 debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
167 uc_priv->codec->name, uc_priv->i2s->name);
172 UCLASS_DRIVER(sound) = {
175 .per_device_auto = sizeof(struct sound_uc_priv),