aboutsummaryrefslogtreecommitdiff
path: root/drivers/sound/sound-uclass.c
blob: 2ffc4fc7c1db7e76ec308c513c03f792563b4044 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2018 Google LLC
 * Written by Simon Glass <sjg@chromium.org>
 */

#define LOG_CATEGORY UCLASS_SOUND

#include <common.h>
#include <dm.h>
#include <i2s.h>
#include <log.h>
#include <malloc.h>
#include <sound.h>
#include <linux/delay.h>

#define SOUND_BITS_IN_BYTE 8

int sound_setup(struct udevice *dev)
{
	struct sound_ops *ops = sound_get_ops(dev);

	if (!ops->setup)
		return 0;

	return ops->setup(dev);
}

int sound_play(struct udevice *dev, void *data, uint data_size)
{
	struct sound_ops *ops = sound_get_ops(dev);

	if (!ops->play)
		return -ENOSYS;

	return ops->play(dev, data, data_size);
}

int sound_stop_play(struct udevice *dev)
{
	struct sound_ops *ops = sound_get_ops(dev);

	if (!ops->play)
		return -ENOSYS;

	return ops->stop_play(dev);
}

int sound_start_beep(struct udevice *dev, int frequency_hz)
{
	struct sound_ops *ops = sound_get_ops(dev);

	if (!ops->start_beep)
		return -ENOSYS;

	return ops->start_beep(dev, frequency_hz);
}

int sound_stop_beep(struct udevice *dev)
{
	struct sound_ops *ops = sound_get_ops(dev);

	if (!ops->stop_beep)
		return -ENOSYS;

	return ops->stop_beep(dev);
}

int sound_beep(struct udevice *dev, int msecs, int frequency_hz)
{
	struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
	struct i2s_uc_priv *i2s_uc_priv;
	unsigned short *data;
	uint data_size;
	int ret;

	ret = sound_setup(dev);
	if (ret && ret != -EALREADY)
		return ret;

	/* Try using the beep interface if available */
	ret = sound_start_beep(dev, frequency_hz);
	if (ret != -ENOSYS) {
		if (ret)
			return ret;
		mdelay(msecs);
		ret = sound_stop_beep(dev);

		return ret;
	}

	/* Buffer length computation */
	i2s_uc_priv = dev_get_uclass_priv(uc_priv->i2s);
	data_size = i2s_uc_priv->samplingrate * i2s_uc_priv->channels;
	data_size *= (i2s_uc_priv->bitspersample / SOUND_BITS_IN_BYTE);
	data = malloc(data_size);
	if (!data) {
		debug("%s: malloc failed\n", __func__);
		return -ENOMEM;
	}

	sound_create_square_wave(i2s_uc_priv->samplingrate, data, data_size,
				 frequency_hz, i2s_uc_priv->channels);

	ret = 0;
	while (msecs >= 1000) {
		ret = sound_play(dev, data, data_size);
		if (ret)
			break;
		msecs -= 1000;
	}
	if (!ret && msecs) {
		unsigned long size =
			(data_size * msecs) / (sizeof(int) * 1000);

		ret = sound_play(dev, data, size);
	}
	sound_stop_play(dev);

	free(data);

	return ret;
}

int sound_find_codec_i2s(struct udevice *dev)
{
	struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
	struct ofnode_phandle_args args;
	ofnode node;
	int ret;

	/* First the codec */
	node = ofnode_find_subnode(dev_ofnode(dev), "codec");
	if (!ofnode_valid(node)) {
		debug("Failed to find /cpu subnode\n");
		return -EINVAL;
	}
	ret = ofnode_parse_phandle_with_args(node, "sound-dai",
					     "#sound-dai-cells", 0, 0, &args);
	if (ret) {
		debug("Cannot find phandle: %d\n", ret);
		return ret;
	}
	ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
					  &uc_priv->codec);
	if (ret) {
		debug("Cannot find codec: %d\n", ret);
		return ret;
	}

	/* Now the i2s */
	node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
	if (!ofnode_valid(node)) {
		debug("Failed to find /cpu subnode\n");
		return -EINVAL;
	}
	ret = ofnode_parse_phandle_with_args(node, "sound-dai",
					     "#sound-dai-cells", 0, 0, &args);
	if (ret) {
		debug("Cannot find phandle: %d\n", ret);
		return ret;
	}
	ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
	if (ret) {
		debug("Cannot find i2s: %d\n", ret);
		return ret;
	}
	debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
	      uc_priv->codec->name, uc_priv->i2s->name);

	return 0;
}

UCLASS_DRIVER(sound) = {
	.id		= UCLASS_SOUND,
	.name		= "sound",
	.per_device_auto	= sizeof(struct sound_uc_priv),
};