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
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
|
/*
* sound/soc/codecs/si476x.c -- Codec driver for SI476X chips
*
* Copyright (C) 2012 Innovative Converged Devices(ICD)
* Copyright (C) 2013 Andrey Smirnov
*
* Author: Andrey Smirnov <andrew.smirnov@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <linux/i2c.h>
#include <linux/mfd/si476x-core.h>
enum si476x_audio_registers {
SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203,
SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202,
};
enum si476x_digital_io_output_format {
SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11,
SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8,
};
#define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0x7 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
(0x7 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
#define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0x7e)
enum si476x_daudio_formats {
SI476X_DAUDIO_MODE_I2S = (0x0 << 1),
SI476X_DAUDIO_MODE_DSP_A = (0x6 << 1),
SI476X_DAUDIO_MODE_DSP_B = (0x7 << 1),
SI476X_DAUDIO_MODE_LEFT_J = (0x8 << 1),
SI476X_DAUDIO_MODE_RIGHT_J = (0x9 << 1),
SI476X_DAUDIO_MODE_IB = (1 << 5),
SI476X_DAUDIO_MODE_IF = (1 << 6),
};
enum si476x_pcm_format {
SI476X_PCM_FORMAT_S8 = 2,
SI476X_PCM_FORMAT_S16_LE = 4,
SI476X_PCM_FORMAT_S20_3LE = 5,
SI476X_PCM_FORMAT_S24_LE = 6,
};
static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
};
static const struct snd_soc_dapm_route si476x_dapm_routes[] = {
{ "Capture", NULL, "LOUT" },
{ "Capture", NULL, "ROUT" },
};
static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev);
int err;
u16 format = 0;
if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
return -EINVAL;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_A:
format |= SI476X_DAUDIO_MODE_DSP_A;
break;
case SND_SOC_DAIFMT_DSP_B:
format |= SI476X_DAUDIO_MODE_DSP_B;
break;
case SND_SOC_DAIFMT_I2S:
format |= SI476X_DAUDIO_MODE_I2S;
break;
case SND_SOC_DAIFMT_RIGHT_J:
format |= SI476X_DAUDIO_MODE_RIGHT_J;
break;
case SND_SOC_DAIFMT_LEFT_J:
format |= SI476X_DAUDIO_MODE_LEFT_J;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_A:
case SND_SOC_DAIFMT_DSP_B:
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_NF:
format |= SI476X_DAUDIO_MODE_IB;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_RIGHT_J:
case SND_SOC_DAIFMT_LEFT_J:
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
format |= SI476X_DAUDIO_MODE_IB |
SI476X_DAUDIO_MODE_IF;
break;
case SND_SOC_DAIFMT_IB_NF:
format |= SI476X_DAUDIO_MODE_IB;
break;
case SND_SOC_DAIFMT_NB_IF:
format |= SI476X_DAUDIO_MODE_IF;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
si476x_core_lock(core);
err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
format);
si476x_core_unlock(core);
if (err < 0) {
dev_err(codec_dai->codec->dev, "Failed to set output format\n");
return err;
}
return 0;
}
static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev);
int rate, width, err;
rate = params_rate(params);
if (rate < 32000 || rate > 48000) {
dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate);
return -EINVAL;
}
switch (params_width(params)) {
case 8:
width = SI476X_PCM_FORMAT_S8;
break;
case 16:
width = SI476X_PCM_FORMAT_S16_LE;
break;
case 20:
width = SI476X_PCM_FORMAT_S20_3LE;
break;
case 24:
width = SI476X_PCM_FORMAT_S24_LE;
break;
default:
return -EINVAL;
}
si476x_core_lock(core);
err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
rate);
if (err < 0) {
dev_err(dai->codec->dev, "Failed to set sample rate\n");
goto out;
}
err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
(width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
(width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
if (err < 0) {
dev_err(dai->codec->dev, "Failed to set output width\n");
goto out;
}
out:
si476x_core_unlock(core);
return err;
}
static struct snd_soc_dai_ops si476x_dai_ops = {
.hw_params = si476x_codec_hw_params,
.set_fmt = si476x_codec_set_dai_fmt,
};
static struct snd_soc_dai_driver si476x_dai = {
.name = "si476x-codec",
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE
},
.ops = &si476x_dai_ops,
};
static struct regmap *si476x_get_regmap(struct device *dev)
{
return dev_get_regmap(dev->parent, NULL);
}
static struct snd_soc_codec_driver soc_codec_dev_si476x = {
.get_regmap = si476x_get_regmap,
.dapm_widgets = si476x_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(si476x_dapm_widgets),
.dapm_routes = si476x_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(si476x_dapm_routes),
};
static int si476x_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x,
&si476x_dai, 1);
}
static int si476x_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
MODULE_ALIAS("platform:si476x-codec");
static struct platform_driver si476x_platform_driver = {
.driver = {
.name = "si476x-codec",
},
.probe = si476x_platform_probe,
.remove = si476x_platform_remove,
};
module_platform_driver(si476x_platform_driver);
MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
MODULE_LICENSE("GPL");
|
