1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
7 #define LOG_CATEGORY UCLASS_SOUND
15 #include <linux/delay.h>
17 #define SOUND_BITS_IN_BYTE 8
19 int sound_setup(struct udevice *dev)
21 struct sound_ops *ops = sound_get_ops(dev);
26 return ops->setup(dev);
29 int sound_play(struct udevice *dev, void *data, uint data_size)
31 struct sound_ops *ops = sound_get_ops(dev);
36 return ops->play(dev, data, data_size);
39 int sound_stop_play(struct udevice *dev)
41 struct sound_ops *ops = sound_get_ops(dev);
46 return ops->stop_play(dev);
49 int sound_start_beep(struct udevice *dev, int frequency_hz)
51 struct sound_ops *ops = sound_get_ops(dev);
56 return ops->start_beep(dev, frequency_hz);
59 int sound_stop_beep(struct udevice *dev)
61 struct sound_ops *ops = sound_get_ops(dev);
66 return ops->stop_beep(dev);
69 int sound_beep(struct udevice *dev, int msecs, int frequency_hz)
71 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
72 struct i2s_uc_priv *i2s_uc_priv;
77 ret = sound_setup(dev);
78 if (ret && ret != -EALREADY)
81 /* Try using the beep interface if available */
82 ret = sound_start_beep(dev, frequency_hz);
87 ret = sound_stop_beep(dev);
92 /* Buffer length computation */
93 i2s_uc_priv = dev_get_uclass_priv(uc_priv->i2s);
94 data_size = i2s_uc_priv->samplingrate * i2s_uc_priv->channels;
95 data_size *= (i2s_uc_priv->bitspersample / SOUND_BITS_IN_BYTE);
96 data = malloc(data_size);
98 debug("%s: malloc failed\n", __func__);
102 sound_create_square_wave(i2s_uc_priv->samplingrate, data, data_size,
103 frequency_hz, i2s_uc_priv->channels);
106 while (msecs >= 1000) {
107 ret = sound_play(dev, data, data_size);
114 (data_size * msecs) / (sizeof(int) * 1000);
116 ret = sound_play(dev, data, size);
118 sound_stop_play(dev);
125 int sound_find_codec_i2s(struct udevice *dev)
127 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
128 struct ofnode_phandle_args args;
132 /* First the codec */
133 node = ofnode_find_subnode(dev_ofnode(dev), "codec");
134 if (!ofnode_valid(node)) {
135 debug("Failed to find /cpu subnode\n");
138 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
139 "#sound-dai-cells", 0, 0, &args);
141 debug("Cannot find phandle: %d\n", ret);
144 ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
147 debug("Cannot find codec: %d\n", ret);
152 node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
153 if (!ofnode_valid(node)) {
154 debug("Failed to find /cpu subnode\n");
157 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
158 "#sound-dai-cells", 0, 0, &args);
160 debug("Cannot find phandle: %d\n", ret);
163 ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
165 debug("Cannot find i2s: %d\n", ret);
168 debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
169 uc_priv->codec->name, uc_priv->i2s->name);
174 UCLASS_DRIVER(sound) = {
177 .per_device_auto = sizeof(struct sound_uc_priv),