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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
// SPDX-License-Identifier: GPL-2.0
//
// Loongson ASoC Audio Machine driver
//
// Copyright (C) 2023 Loongson Technology Corporation Limited
// Author: Yingkun Meng <mengyingkun@loongson.cn>
//
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/soc-acpi.h>
#include <linux/acpi.h>
#include <linux/pci.h>
#include <sound/pcm_params.h>
static char codec_name[SND_ACPI_I2C_ID_LEN];
struct loongson_card_data {
struct snd_soc_card snd_card;
unsigned int mclk_fs;
};
static int loongson_card_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
struct loongson_card_data *ls_card = snd_soc_card_get_drvdata(rtd->card);
int ret, mclk;
if (ls_card->mclk_fs) {
mclk = ls_card->mclk_fs * params_rate(params);
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
SND_SOC_CLOCK_OUT);
if (ret < 0) {
dev_err(codec_dai->dev, "cpu_dai clock not set\n");
return ret;
}
ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(codec_dai->dev, "codec_dai clock not set\n");
return ret;
}
}
return 0;
}
static const struct snd_soc_ops loongson_ops = {
.hw_params = loongson_card_hw_params,
};
SND_SOC_DAILINK_DEFS(analog,
DAILINK_COMP_ARRAY(COMP_CPU("loongson-i2s")),
DAILINK_COMP_ARRAY(COMP_EMPTY()),
DAILINK_COMP_ARRAY(COMP_EMPTY()));
static struct snd_soc_dai_link loongson_dai_links[] = {
{
.name = "Loongson Audio Port",
.stream_name = "Loongson Audio",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_IB_NF
| SND_SOC_DAIFMT_CBC_CFC,
SND_SOC_DAILINK_REG(analog),
.ops = &loongson_ops,
},
};
static int loongson_card_parse_acpi(struct loongson_card_data *data)
{
struct snd_soc_card *card = &data->snd_card;
struct fwnode_handle *fwnode = card->dev->fwnode;
struct fwnode_reference_args args;
const char *codec_dai_name;
struct acpi_device *adev;
struct device *phy_dev;
int ret, i;
/* fixup platform name based on reference node */
memset(&args, 0, sizeof(args));
ret = acpi_node_get_property_reference(fwnode, "cpu", 0, &args);
if (ret || !is_acpi_device_node(args.fwnode)) {
dev_err(card->dev, "No matching phy in ACPI table\n");
return ret ?: -ENOENT;
}
adev = to_acpi_device_node(args.fwnode);
phy_dev = acpi_get_first_physical_node(adev);
if (!phy_dev)
return -EPROBE_DEFER;
for (i = 0; i < card->num_links; i++)
loongson_dai_links[i].platforms->name = dev_name(phy_dev);
/* fixup codec name based on reference node */
memset(&args, 0, sizeof(args));
ret = acpi_node_get_property_reference(fwnode, "codec", 0, &args);
if (ret || !is_acpi_device_node(args.fwnode)) {
dev_err(card->dev, "No matching phy in ACPI table\n");
return ret ?: -ENOENT;
}
adev = to_acpi_device_node(args.fwnode);
snprintf(codec_name, sizeof(codec_name), "i2c-%s", acpi_dev_name(adev));
for (i = 0; i < card->num_links; i++)
loongson_dai_links[i].codecs->name = codec_name;
device_property_read_string(card->dev, "codec-dai-name",
&codec_dai_name);
for (i = 0; i < card->num_links; i++)
loongson_dai_links[i].codecs->dai_name = codec_dai_name;
return 0;
}
static int loongson_card_parse_of(struct loongson_card_data *data)
{
struct device_node *cpu, *codec;
struct snd_soc_card *card = &data->snd_card;
struct device *dev = card->dev;
int ret, i;
cpu = of_get_child_by_name(dev->of_node, "cpu");
if (!cpu) {
dev_err(dev, "platform property missing or invalid\n");
return -EINVAL;
}
codec = of_get_child_by_name(dev->of_node, "codec");
if (!codec) {
dev_err(dev, "audio-codec property missing or invalid\n");
ret = -EINVAL;
goto err;
}
for (i = 0; i < card->num_links; i++) {
ret = snd_soc_of_get_dlc(cpu, NULL, loongson_dai_links[i].cpus, 0);
if (ret < 0) {
dev_err(dev, "getting cpu dlc error (%d)\n", ret);
goto err;
}
ret = snd_soc_of_get_dlc(codec, NULL, loongson_dai_links[i].codecs, 0);
if (ret < 0) {
dev_err(dev, "getting codec dlc error (%d)\n", ret);
goto err;
}
}
of_node_put(cpu);
of_node_put(codec);
return 0;
err:
of_node_put(cpu);
of_node_put(codec);
return ret;
}
static int loongson_asoc_card_probe(struct platform_device *pdev)
{
struct loongson_card_data *ls_priv;
struct snd_soc_card *card;
int ret;
ls_priv = devm_kzalloc(&pdev->dev, sizeof(*ls_priv), GFP_KERNEL);
if (!ls_priv)
return -ENOMEM;
card = &ls_priv->snd_card;
card->dev = &pdev->dev;
card->owner = THIS_MODULE;
card->dai_link = loongson_dai_links;
card->num_links = ARRAY_SIZE(loongson_dai_links);
snd_soc_card_set_drvdata(card, ls_priv);
ret = device_property_read_string(&pdev->dev, "model", &card->name);
if (ret) {
dev_err(&pdev->dev, "Error parsing card name: %d\n", ret);
return ret;
}
ret = device_property_read_u32(&pdev->dev, "mclk-fs", &ls_priv->mclk_fs);
if (ret) {
dev_err(&pdev->dev, "Error parsing mclk-fs: %d\n", ret);
return ret;
}
if (has_acpi_companion(&pdev->dev))
ret = loongson_card_parse_acpi(ls_priv);
else
ret = loongson_card_parse_of(ls_priv);
if (ret < 0)
return ret;
ret = devm_snd_soc_register_card(&pdev->dev, card);
return ret;
}
static const struct of_device_id loongson_asoc_dt_ids[] = {
{ .compatible = "loongson,ls-audio-card" },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, loongson_asoc_dt_ids);
static struct platform_driver loongson_audio_driver = {
.probe = loongson_asoc_card_probe,
.driver = {
.name = "loongson-asoc-card",
.pm = &snd_soc_pm_ops,
.of_match_table = loongson_asoc_dt_ids,
},
};
module_platform_driver(loongson_audio_driver);
MODULE_DESCRIPTION("Loongson ASoc Sound Card driver");
MODULE_AUTHOR("Loongson Technology Corporation Limited");
MODULE_LICENSE("GPL");
|
