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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
* ATMEL AT91SAM9G20ek board.
*
* Copyright (C) 2005 SAN People
* Copyright (C) 2008 Atmel
*
* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
*
* Based on ati_b1_wm8731.c by:
* Frank Mandarino <fmandarino@endrelia.com>
* Copyright 2006 Endrelia Technologies Inc.
* Based on corgi.c by:
* Copyright 2005 Wolfson Microelectronics PLC.
* Copyright 2005 Openedhand Ltd.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/atmel-ssc.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "../codecs/wm8731.h"
#include "atmel-pcm.h"
#include "atmel_ssc_dai.h"
#define MCLK_RATE 12000000
/*
* As shipped the board does not have inputs. However, it is relatively
* straightforward to modify the board to hook them up so support is left
* in the driver.
*/
#undef ENABLE_MIC_INPUT
static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
SND_SOC_DAPM_MIC("Int Mic", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
};
static const struct snd_soc_dapm_route intercon[] = {
/* speaker connected to LHPOUT/RHPOUT */
{"Ext Spk", NULL, "LHPOUT"},
{"Ext Spk", NULL, "RHPOUT"},
/* mic is connected to Mic Jack, with WM8731 Mic Bias */
{"MICIN", NULL, "Mic Bias"},
{"Mic Bias", NULL, "Int Mic"},
};
/*
* Logic for a wm8731 as connected on a at91sam9g20ek board.
*/
static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
struct device *dev = rtd->dev;
int ret;
dev_dbg(dev, "%s called\n", __func__);
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
MCLK_RATE, SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);
return ret;
}
#ifndef ENABLE_MIC_INPUT
snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
#endif
return 0;
}
SND_SOC_DAILINK_DEFS(pcm,
DAILINK_COMP_ARRAY(COMP_CPU("at91rm9200_ssc.0")),
DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")),
DAILINK_COMP_ARRAY(COMP_PLATFORM("at91rm9200_ssc.0")));
static struct snd_soc_dai_link at91sam9g20ek_dai = {
.name = "WM8731",
.stream_name = "WM8731 PCM",
.init = at91sam9g20ek_wm8731_init,
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBP_CFP,
SND_SOC_DAILINK_REG(pcm),
};
static struct snd_soc_card snd_soc_at91sam9g20ek = {
.name = "AT91SAMG20-EK",
.owner = THIS_MODULE,
.dai_link = &at91sam9g20ek_dai,
.num_links = 1,
.dapm_widgets = at91sam9g20ek_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
.dapm_routes = intercon,
.num_dapm_routes = ARRAY_SIZE(intercon),
.fully_routed = true,
};
static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *codec_np, *cpu_np;
struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
int ret;
if (!np) {
return -ENODEV;
}
ret = atmel_ssc_set_audio(0);
if (ret) {
dev_err(&pdev->dev, "ssc channel is not valid: %d\n", ret);
return ret;
}
card->dev = &pdev->dev;
/* Parse device node info */
ret = snd_soc_of_parse_card_name(card, "atmel,model");
if (ret)
goto err;
ret = snd_soc_of_parse_audio_routing(card,
"atmel,audio-routing");
if (ret)
goto err;
/* Parse codec info */
at91sam9g20ek_dai.codecs->name = NULL;
codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
if (!codec_np) {
dev_err(&pdev->dev, "codec info missing\n");
ret = -EINVAL;
goto err;
}
at91sam9g20ek_dai.codecs->of_node = codec_np;
/* Parse dai and platform info */
at91sam9g20ek_dai.cpus->dai_name = NULL;
at91sam9g20ek_dai.platforms->name = NULL;
cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
if (!cpu_np) {
dev_err(&pdev->dev, "dai and pcm info missing\n");
of_node_put(codec_np);
ret = -EINVAL;
goto err;
}
at91sam9g20ek_dai.cpus->of_node = cpu_np;
at91sam9g20ek_dai.platforms->of_node = cpu_np;
of_node_put(codec_np);
of_node_put(cpu_np);
ret = snd_soc_register_card(card);
if (ret) {
dev_err_probe(&pdev->dev, ret,
"snd_soc_register_card() failed\n");
goto err;
}
return 0;
err:
atmel_ssc_put_audio(0);
return ret;
}
static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
snd_soc_unregister_card(card);
atmel_ssc_put_audio(0);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
{ .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
{ }
};
MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
#endif
static struct platform_driver at91sam9g20ek_audio_driver = {
.driver = {
.name = "at91sam9g20ek-audio",
.of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
},
.probe = at91sam9g20ek_audio_probe,
.remove = at91sam9g20ek_audio_remove,
};
module_platform_driver(at91sam9g20ek_audio_driver);
/* Module information */
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
MODULE_ALIAS("platform:at91sam9g20ek-audio");
MODULE_LICENSE("GPL");
|
