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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for the 1250-EV1 audio I/O module
*
* Copyright 2011 Wolfson Microelectronics plc
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/gpio/consumer.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
struct wm1250_priv {
struct gpio_desc *clk_ena;
struct gpio_desc *clk_sel0;
struct gpio_desc *clk_sel1;
struct gpio_desc *osr;
struct gpio_desc *master;
};
static int wm1250_ev1_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct wm1250_priv *wm1250 = dev_get_drvdata(component->dev);
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
gpiod_set_value_cansleep(wm1250->clk_ena, 1);
break;
case SND_SOC_BIAS_OFF:
gpiod_set_value_cansleep(wm1250->clk_ena, 0);
break;
}
return 0;
}
static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_INPUT("WM1250 Input"),
SND_SOC_DAPM_OUTPUT("WM1250 Output"),
};
static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
{ "ADC", NULL, "WM1250 Input" },
{ "WM1250 Output", NULL, "DAC" },
};
static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct wm1250_priv *wm1250 = snd_soc_component_get_drvdata(dai->component);
switch (params_rate(params)) {
case 8000:
gpiod_set_value(wm1250->clk_sel0, 1);
gpiod_set_value(wm1250->clk_sel1, 1);
break;
case 16000:
gpiod_set_value(wm1250->clk_sel0, 0);
gpiod_set_value(wm1250->clk_sel1, 1);
break;
case 32000:
gpiod_set_value(wm1250->clk_sel0, 1);
gpiod_set_value(wm1250->clk_sel1, 0);
break;
case 64000:
gpiod_set_value(wm1250->clk_sel0, 0);
gpiod_set_value(wm1250->clk_sel1, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static const struct snd_soc_dai_ops wm1250_ev1_ops = {
.hw_params = wm1250_ev1_hw_params,
};
#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000)
static struct snd_soc_dai_driver wm1250_ev1_dai = {
.name = "wm1250-ev1",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM1250_EV1_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = WM1250_EV1_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &wm1250_ev1_ops,
};
static const struct snd_soc_component_driver soc_component_dev_wm1250_ev1 = {
.dapm_widgets = wm1250_ev1_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
.dapm_routes = wm1250_ev1_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
.set_bias_level = wm1250_ev1_set_bias_level,
.use_pmdown_time = 1,
.endianness = 1,
};
static int wm1250_ev1_pdata(struct i2c_client *i2c)
{
struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
struct wm1250_priv *wm1250;
if (!pdata)
return 0;
wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
if (!wm1250)
return -ENOMEM;
wm1250->clk_ena = devm_gpiod_get(&i2c->dev, "clk-ena", GPIOD_OUT_LOW);
if (IS_ERR(wm1250->clk_ena))
return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_ena),
"failed to get clock enable GPIO\n");
wm1250->clk_sel0 = devm_gpiod_get(&i2c->dev, "clk-sel0", GPIOD_OUT_HIGH);
if (IS_ERR(wm1250->clk_sel0))
return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_sel0),
"failed to get clock sel0 GPIO\n");
wm1250->clk_sel1 = devm_gpiod_get(&i2c->dev, "clk-sel1", GPIOD_OUT_HIGH);
if (IS_ERR(wm1250->clk_sel1))
return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_sel1),
"failed to get clock sel1 GPIO\n");
wm1250->osr = devm_gpiod_get(&i2c->dev, "osr", GPIOD_OUT_LOW);
if (IS_ERR(wm1250->osr))
return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->osr),
"failed to get OSR GPIO\n");
wm1250->master = devm_gpiod_get(&i2c->dev, "master", GPIOD_OUT_LOW);
if (IS_ERR(wm1250->master))
return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->master),
"failed to get MASTER GPIO\n");
dev_set_drvdata(&i2c->dev, wm1250);
return 0;
}
static int wm1250_ev1_probe(struct i2c_client *i2c)
{
int id, board, rev, ret;
dev_set_drvdata(&i2c->dev, NULL);
board = i2c_smbus_read_byte_data(i2c, 0);
if (board < 0) {
dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
return board;
}
id = (board & 0xfe) >> 2;
rev = board & 0x3;
if (id != 1) {
dev_err(&i2c->dev, "Unknown board ID %d\n", id);
return -ENODEV;
}
dev_info(&i2c->dev, "revision %d\n", rev + 1);
ret = wm1250_ev1_pdata(i2c);
if (ret != 0)
return ret;
ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_wm1250_ev1,
&wm1250_ev1_dai, 1);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
return ret;
}
return 0;
}
static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
{ "wm1250-ev1" },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
static struct i2c_driver wm1250_ev1_i2c_driver = {
.driver = {
.name = "wm1250-ev1",
},
.probe = wm1250_ev1_probe,
.id_table = wm1250_ev1_i2c_id,
};
module_i2c_driver(wm1250_ev1_i2c_driver);
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
MODULE_LICENSE("GPL");
|
