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
|
/*
* PCM179X ASoC codec driver
*
* Copyright (c) Amarula Solutions B.V. 2013
*
* Michael Trimarchi <michael@amarulasolutions.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; either version 2
* of the License, or (at your option) any later version.
*
* 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 <linux/kernel.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <linux/of.h>
#include "pcm179x.h"
#define PCM179X_DAC_VOL_LEFT 0x10
#define PCM179X_DAC_VOL_RIGHT 0x11
#define PCM179X_FMT_CONTROL 0x12
#define PCM179X_MODE_CONTROL 0x13
#define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL
#define PCM179X_FMT_MASK 0x70
#define PCM179X_FMT_SHIFT 4
#define PCM179X_MUTE_MASK 0x01
#define PCM179X_MUTE_SHIFT 0
#define PCM179X_ATLD_ENABLE (1 << 7)
static const struct reg_default pcm179x_reg_defaults[] = {
{ 0x10, 0xff },
{ 0x11, 0xff },
{ 0x12, 0x50 },
{ 0x13, 0x00 },
{ 0x14, 0x00 },
{ 0x15, 0x01 },
{ 0x16, 0x00 },
{ 0x17, 0x00 },
};
static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
{
return reg >= 0x10 && reg <= 0x17;
}
static bool pcm179x_writeable_reg(struct device *dev, unsigned register reg)
{
bool accessible;
accessible = pcm179x_accessible_reg(dev, reg);
return accessible && reg != 0x16 && reg != 0x17;
}
struct pcm179x_private {
struct regmap *regmap;
unsigned int format;
unsigned int rate;
};
static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
priv->format = format;
return 0;
}
static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
int ret;
ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
PCM179X_MUTE_MASK, !!mute);
if (ret < 0)
return ret;
return 0;
}
static int pcm179x_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
int val = 0, ret;
priv->rate = params_rate(params);
switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
switch (params_width(params)) {
case 24:
case 32:
val = 2;
break;
case 16:
val = 0;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_I2S:
switch (params_width(params)) {
case 24:
case 32:
val = 5;
break;
case 16:
val = 4;
break;
default:
return -EINVAL;
}
break;
default:
dev_err(codec->dev, "Invalid DAI format\n");
return -EINVAL;
}
val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;
ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
if (ret < 0)
return ret;
return 0;
}
static const struct snd_soc_dai_ops pcm179x_dai_ops = {
.set_fmt = pcm179x_set_dai_fmt,
.hw_params = pcm179x_hw_params,
.digital_mute = pcm179x_digital_mute,
};
static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
static const struct snd_kcontrol_new pcm179x_controls[] = {
SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
pcm179x_dac_tlv),
SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
};
static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("IOUTL+"),
SND_SOC_DAPM_OUTPUT("IOUTL-"),
SND_SOC_DAPM_OUTPUT("IOUTR+"),
SND_SOC_DAPM_OUTPUT("IOUTR-"),
};
static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
{ "IOUTL+", NULL, "Playback" },
{ "IOUTL-", NULL, "Playback" },
{ "IOUTR+", NULL, "Playback" },
{ "IOUTR-", NULL, "Playback" },
};
static struct snd_soc_dai_driver pcm179x_dai = {
.name = "pcm179x-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 10000,
.rate_max = 200000,
.formats = PCM1792A_FORMATS, },
.ops = &pcm179x_dai_ops,
};
const struct regmap_config pcm179x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 23,
.reg_defaults = pcm179x_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults),
.writeable_reg = pcm179x_writeable_reg,
.readable_reg = pcm179x_accessible_reg,
};
EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
static struct snd_soc_codec_driver soc_codec_dev_pcm179x = {
.controls = pcm179x_controls,
.num_controls = ARRAY_SIZE(pcm179x_controls),
.dapm_widgets = pcm179x_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets),
.dapm_routes = pcm179x_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes),
};
int pcm179x_common_init(struct device *dev, struct regmap *regmap)
{
struct pcm179x_private *pcm179x;
pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
GFP_KERNEL);
if (!pcm179x)
return -ENOMEM;
pcm179x->regmap = regmap;
dev_set_drvdata(dev, pcm179x);
return snd_soc_register_codec(dev,
&soc_codec_dev_pcm179x, &pcm179x_dai, 1);
}
EXPORT_SYMBOL_GPL(pcm179x_common_init);
int pcm179x_common_exit(struct device *dev)
{
snd_soc_unregister_codec(dev);
return 0;
}
EXPORT_SYMBOL_GPL(pcm179x_common_exit);
MODULE_DESCRIPTION("ASoC PCM179X driver");
MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
MODULE_LICENSE("GPL");
|
