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
|
// SPDX-License-Identifier: GPL-2.0
//
// ALSA SoC driver for Migo-R
//
// Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
#include <linux/clkdev.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <asm/clock.h>
#include <cpu/sh7722.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include "../codecs/wm8978.h"
#include "siu.h"
/* Default 8000Hz sampling frequency */
static unsigned long codec_freq = 8000 * 512;
static unsigned int use_count;
/* External clock, sourced from the codec at the SIUMCKB pin */
static unsigned long siumckb_recalc(struct clk *clk)
{
return codec_freq;
}
static struct sh_clk_ops siumckb_clk_ops = {
.recalc = siumckb_recalc,
};
static struct clk siumckb_clk = {
.ops = &siumckb_clk_ops,
.rate = 0, /* initialised at run-time */
};
static struct clk_lookup *siumckb_lookup;
static int migor_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
int ret;
unsigned int rate = params_rate(params);
ret = snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 13000000,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_OPCLKRATE, rate * 512);
if (ret < 0)
return ret;
codec_freq = rate * 512;
/*
* This propagates the parent frequency change to children and
* recalculates the frequency table
*/
clk_set_rate(&siumckb_clk, codec_freq);
dev_dbg(codec_dai->dev, "%s: configure %luHz\n", __func__, codec_freq);
ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), SIU_CLKB_EXT,
codec_freq / 2, SND_SOC_CLOCK_IN);
if (!ret)
use_count++;
return ret;
}
static int migor_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
if (use_count) {
use_count--;
if (!use_count)
snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 0,
SND_SOC_CLOCK_IN);
} else {
dev_dbg(codec_dai->dev, "Unbalanced hw_free!\n");
}
return 0;
}
static const struct snd_soc_ops migor_dai_ops = {
.hw_params = migor_hw_params,
.hw_free = migor_hw_free,
};
static const struct snd_soc_dapm_widget migor_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone", NULL),
SND_SOC_DAPM_MIC("Onboard Microphone", NULL),
SND_SOC_DAPM_MIC("External Microphone", NULL),
};
static const struct snd_soc_dapm_route audio_map[] = {
/* Headphone output connected to LHP/RHP, enable OUT4 for VMID */
{ "Headphone", NULL, "OUT4 VMID" },
{ "OUT4 VMID", NULL, "LHP" },
{ "OUT4 VMID", NULL, "RHP" },
/* On-board microphone */
{ "RMICN", NULL, "Mic Bias" },
{ "RMICP", NULL, "Mic Bias" },
{ "Mic Bias", NULL, "Onboard Microphone" },
/* External microphone */
{ "LMICN", NULL, "Mic Bias" },
{ "LMICP", NULL, "Mic Bias" },
{ "Mic Bias", NULL, "External Microphone" },
};
/* migor digital audio interface glue - connects codec <--> CPU */
SND_SOC_DAILINK_DEFS(wm8978,
DAILINK_COMP_ARRAY(COMP_CPU("siu-pcm-audio")),
DAILINK_COMP_ARRAY(COMP_CODEC("wm8978.0-001a", "wm8978-hifi")),
DAILINK_COMP_ARRAY(COMP_PLATFORM("siu-pcm-audio")));
static struct snd_soc_dai_link migor_dai = {
.name = "wm8978",
.stream_name = "WM8978",
.dai_fmt = SND_SOC_DAIFMT_NB_IF | SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &migor_dai_ops,
SND_SOC_DAILINK_REG(wm8978),
};
/* migor audio machine driver */
static struct snd_soc_card snd_soc_migor = {
.name = "Migo-R",
.owner = THIS_MODULE,
.dai_link = &migor_dai,
.num_links = 1,
.dapm_widgets = migor_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(migor_dapm_widgets),
.dapm_routes = audio_map,
.num_dapm_routes = ARRAY_SIZE(audio_map),
};
static struct platform_device *migor_snd_device;
static int __init migor_init(void)
{
int ret;
ret = clk_register(&siumckb_clk);
if (ret < 0)
return ret;
siumckb_lookup = clkdev_create(&siumckb_clk, "siumckb_clk", NULL);
if (!siumckb_lookup) {
ret = -ENOMEM;
goto eclkdevalloc;
}
/* Port number used on this machine: port B */
migor_snd_device = platform_device_alloc("soc-audio", 1);
if (!migor_snd_device) {
ret = -ENOMEM;
goto epdevalloc;
}
platform_set_drvdata(migor_snd_device, &snd_soc_migor);
ret = platform_device_add(migor_snd_device);
if (ret)
goto epdevadd;
return 0;
epdevadd:
platform_device_put(migor_snd_device);
epdevalloc:
clkdev_drop(siumckb_lookup);
eclkdevalloc:
clk_unregister(&siumckb_clk);
return ret;
}
static void __exit migor_exit(void)
{
clkdev_drop(siumckb_lookup);
clk_unregister(&siumckb_clk);
platform_device_unregister(migor_snd_device);
}
module_init(migor_init);
module_exit(migor_exit);
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_DESCRIPTION("ALSA SoC Migor");
MODULE_LICENSE("GPL v2");
|
