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
|
// SPDX-License-Identifier: GPL-2.0
// Audio driver for PCM1789
// Copyright (C) 2018 Bootlin
// Mylène Josserand <mylene.josserand@bootlin.com>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "pcm1789.h"
#define PCM1789_MUTE_CONTROL 0x10
#define PCM1789_FMT_CONTROL 0x11
#define PCM1789_SOFT_MUTE 0x14
#define PCM1789_DAC_VOL_LEFT 0x18
#define PCM1789_DAC_VOL_RIGHT 0x19
#define PCM1789_FMT_MASK 0x07
#define PCM1789_MUTE_MASK 0x03
#define PCM1789_MUTE_SRET 0x06
struct pcm1789_private {
struct regmap *regmap;
unsigned int format;
unsigned int rate;
struct gpio_desc *reset;
struct work_struct work;
struct device *dev;
};
static const struct reg_default pcm1789_reg_defaults[] = {
{ PCM1789_FMT_CONTROL, 0x00 },
{ PCM1789_SOFT_MUTE, 0x00 },
{ PCM1789_DAC_VOL_LEFT, 0xff },
{ PCM1789_DAC_VOL_RIGHT, 0xff },
};
static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg)
{
return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT;
}
static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg)
{
return pcm1789_accessible_reg(dev, reg);
}
static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
struct snd_soc_component *component = codec_dai->component;
struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
priv->format = format;
return 0;
}
static int pcm1789_mute(struct snd_soc_dai *codec_dai, int mute, int direction)
{
struct snd_soc_component *component = codec_dai->component;
struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,
PCM1789_MUTE_MASK,
mute ? 0 : PCM1789_MUTE_MASK);
}
static int pcm1789_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *codec_dai)
{
struct snd_soc_component *component = codec_dai->component;
struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
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:
val = 2;
break;
case 16:
val = 3;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_I2S:
switch (params_width(params)) {
case 16:
case 24:
case 32:
val = 0;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_LEFT_J:
switch (params_width(params)) {
case 16:
case 24:
case 32:
val = 1;
break;
default:
return -EINVAL;
}
break;
default:
dev_err(component->dev, "Invalid DAI format\n");
return -EINVAL;
}
ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL,
PCM1789_FMT_MASK, val);
if (ret < 0)
return ret;
return 0;
}
static void pcm1789_work_queue(struct work_struct *work)
{
struct pcm1789_private *priv = container_of(work,
struct pcm1789_private,
work);
/* Perform a software reset to remove codec from desynchronized state */
if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL,
0x3 << PCM1789_MUTE_SRET, 0) < 0)
dev_err(priv->dev, "Error while setting SRET");
}
static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
schedule_work(&priv->work);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
break;
default:
ret = -EINVAL;
}
return ret;
}
static const struct snd_soc_dai_ops pcm1789_dai_ops = {
.set_fmt = pcm1789_set_dai_fmt,
.hw_params = pcm1789_hw_params,
.mute_stream = pcm1789_mute,
.trigger = pcm1789_trigger,
.no_capture_mute = 1,
};
static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1);
static const struct snd_kcontrol_new pcm1789_controls[] = {
SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT,
PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
pcm1789_dac_tlv),
};
static const struct snd_soc_dapm_widget pcm1789_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 pcm1789_dapm_routes[] = {
{ "IOUTL+", NULL, "Playback" },
{ "IOUTL-", NULL, "Playback" },
{ "IOUTR+", NULL, "Playback" },
{ "IOUTR-", NULL, "Playback" },
};
static struct snd_soc_dai_driver pcm1789_dai = {
.name = "pcm1789-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 10000,
.rate_max = 200000,
.formats = PCM1789_FORMATS,
},
.ops = &pcm1789_dai_ops,
};
const struct regmap_config pcm1789_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = PCM1789_DAC_VOL_RIGHT,
.reg_defaults = pcm1789_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults),
.writeable_reg = pcm1789_writeable_reg,
.readable_reg = pcm1789_accessible_reg,
};
EXPORT_SYMBOL_GPL(pcm1789_regmap_config);
static const struct snd_soc_component_driver soc_component_dev_pcm1789 = {
.controls = pcm1789_controls,
.num_controls = ARRAY_SIZE(pcm1789_controls),
.dapm_widgets = pcm1789_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets),
.dapm_routes = pcm1789_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
int pcm1789_common_init(struct device *dev, struct regmap *regmap)
{
struct pcm1789_private *pcm1789;
pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private),
GFP_KERNEL);
if (!pcm1789)
return -ENOMEM;
pcm1789->regmap = regmap;
pcm1789->dev = dev;
dev_set_drvdata(dev, pcm1789);
pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(pcm1789->reset))
return PTR_ERR(pcm1789->reset);
gpiod_set_value_cansleep(pcm1789->reset, 0);
msleep(300);
INIT_WORK(&pcm1789->work, pcm1789_work_queue);
return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789,
&pcm1789_dai, 1);
}
EXPORT_SYMBOL_GPL(pcm1789_common_init);
void pcm1789_common_exit(struct device *dev)
{
struct pcm1789_private *priv = dev_get_drvdata(dev);
flush_work(&priv->work);
}
EXPORT_SYMBOL_GPL(pcm1789_common_exit);
MODULE_DESCRIPTION("ASoC PCM1789 driver");
MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>");
MODULE_LICENSE("GPL");
|
