1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
14 #define SOUND_BITS_IN_BYTE 8
16 int sound_setup(struct udevice *dev)
18 struct sound_ops *ops = sound_get_ops(dev);
23 return ops->setup(dev);
26 int sound_play(struct udevice *dev, void *data, uint data_size)
28 struct sound_ops *ops = sound_get_ops(dev);
33 return ops->play(dev, data, data_size);
36 int sound_stop_play(struct udevice *dev)
38 struct sound_ops *ops = sound_get_ops(dev);
43 return ops->stop_play(dev);
46 int sound_start_beep(struct udevice *dev, int frequency_hz)
48 struct sound_ops *ops = sound_get_ops(dev);
53 return ops->start_beep(dev, frequency_hz);
56 int sound_stop_beep(struct udevice *dev)
58 struct sound_ops *ops = sound_get_ops(dev);
63 return ops->stop_beep(dev);
66 int sound_beep(struct udevice *dev, int msecs, int frequency_hz)
68 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
69 struct i2s_uc_priv *i2s_uc_priv;
74 ret = sound_setup(dev);
75 if (ret && ret != -EALREADY)
78 /* Try using the beep interface if available */
79 ret = sound_start_beep(dev, frequency_hz);
84 ret = sound_stop_beep(dev);
89 /* Buffer length computation */
90 i2s_uc_priv = dev_get_uclass_priv(uc_priv->i2s);
91 data_size = i2s_uc_priv->samplingrate * i2s_uc_priv->channels;
92 data_size *= (i2s_uc_priv->bitspersample / SOUND_BITS_IN_BYTE);
93 data = malloc(data_size);
95 debug("%s: malloc failed\n", __func__);
99 sound_create_square_wave(i2s_uc_priv->samplingrate, data, data_size,
100 frequency_hz, i2s_uc_priv->channels);
103 while (msecs >= 1000) {
104 ret = sound_play(dev, data, data_size);
111 (data_size * msecs) / (sizeof(int) * 1000);
113 ret = sound_play(dev, data, size);
115 sound_stop_play(dev);
122 int sound_find_codec_i2s(struct udevice *dev)
124 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
125 struct ofnode_phandle_args args;
129 /* First the codec */
130 node = ofnode_find_subnode(dev_ofnode(dev), "codec");
131 if (!ofnode_valid(node)) {
132 debug("Failed to find /cpu subnode\n");
135 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
136 "#sound-dai-cells", 0, 0, &args);
138 debug("Cannot find phandle: %d\n", ret);
141 ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
144 debug("Cannot find codec: %d\n", ret);
149 node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
150 if (!ofnode_valid(node)) {
151 debug("Failed to find /cpu subnode\n");
154 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
155 "#sound-dai-cells", 0, 0, &args);
157 debug("Cannot find phandle: %d\n", ret);
160 ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
162 debug("Cannot find i2s: %d\n", ret);
165 debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
166 uc_priv->codec->name, uc_priv->i2s->name);
171 UCLASS_DRIVER(sound) = {
174 .per_device_auto_alloc_size = sizeof(struct sound_uc_priv),