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
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
|
/*
* zylonite.c -- SoC audio for Zylonite
*
* Copyright 2008 Wolfson Microelectronics PLC.
* Author: Mark Brown <broonie@opensource.wolfsonmicro.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.
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "../codecs/wm9713.h"
#include "pxa2xx-ac97.h"
#include "pxa-ssp.h"
/*
* There is a physical switch SW15 on the board which changes the MCLK
* for the WM9713 between the standard AC97 master clock and the
* output of the CLK_POUT signal from the PXA.
*/
static int clk_pout;
module_param(clk_pout, int, 0);
MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");
static struct clk *pout;
static struct snd_soc_card zylonite;
static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone", NULL),
SND_SOC_DAPM_MIC("Headset Microphone", NULL),
SND_SOC_DAPM_MIC("Handset Microphone", NULL),
SND_SOC_DAPM_SPK("Multiactor", NULL),
SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
};
/* Currently supported audio map */
static const struct snd_soc_dapm_route audio_map[] = {
/* Headphone output connected to HPL/HPR */
{ "Headphone", NULL, "HPL" },
{ "Headphone", NULL, "HPR" },
/* On-board earpiece */
{ "Headset Earpiece", NULL, "OUT3" },
/* Headphone mic */
{ "MIC2A", NULL, "Mic Bias" },
{ "Mic Bias", NULL, "Headset Microphone" },
/* On-board mic */
{ "MIC1", NULL, "Mic Bias" },
{ "Mic Bias", NULL, "Handset Microphone" },
/* Multiactor differentially connected over SPKL/SPKR */
{ "Multiactor", NULL, "SPKL" },
{ "Multiactor", NULL, "SPKR" },
};
static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dapm_context *dapm = &codec->dapm;
if (clk_pout)
snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
clk_get_rate(pout), 0);
snd_soc_dapm_new_controls(dapm, zylonite_dapm_widgets,
ARRAY_SIZE(zylonite_dapm_widgets));
snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
/* Static setup for now */
snd_soc_dapm_enable_pin(dapm, "Headphone");
snd_soc_dapm_enable_pin(dapm, "Headset Earpiece");
snd_soc_dapm_sync(dapm);
return 0;
}
static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
unsigned int pll_out = 0;
unsigned int wm9713_div = 0;
int ret = 0;
int rate = params_rate(params);
int width = snd_pcm_format_physical_width(params_format(params));
/* Only support ratios that we can generate neatly from the AC97
* based master clock - in particular, this excludes 44.1kHz.
* In most applications the voice DAC will be used for telephony
* data so multiples of 8kHz will be the common case.
*/
switch (rate) {
case 8000:
wm9713_div = 12;
break;
case 16000:
wm9713_div = 6;
break;
case 48000:
wm9713_div = 2;
break;
default:
/* Don't support OSS emulation */
return -EINVAL;
}
/* Add 1 to the width for the leading clock cycle */
pll_out = rate * (width + 1) * 8;
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
if (ret < 0)
return ret;
if (clk_pout)
ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
WM9713_PCMDIV(wm9713_div));
else
ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
WM9713_PCMDIV(wm9713_div));
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops zylonite_voice_ops = {
.hw_params = zylonite_voice_hw_params,
};
static struct snd_soc_dai_link zylonite_dai[] = {
{
.name = "AC97",
.stream_name = "AC97 HiFi",
.codec_name = "wm9713-codec",
.platform_name = "pxa-pcm-audio",
.cpu_dai_name = "pxa-ac97.0",
.codec_name = "wm9713-hifi",
.init = zylonite_wm9713_init,
},
{
.name = "AC97 Aux",
.stream_name = "AC97 Aux",
.codec_name = "wm9713-codec",
.platform_name = "pxa-pcm-audio",
.cpu_dai_name = "pxa-ac97.1",
.codec_name = "wm9713-aux",
},
{
.name = "WM9713 Voice",
.stream_name = "WM9713 Voice",
.codec_name = "wm9713-codec",
.platform_name = "pxa-pcm-audio",
.cpu_dai_name = "pxa-ssp-dai.2",
.codec_name = "wm9713-voice",
.ops = &zylonite_voice_ops,
},
};
static int zylonite_probe(struct platform_device *pdev)
{
int ret;
if (clk_pout) {
pout = clk_get(NULL, "CLK_POUT");
if (IS_ERR(pout)) {
dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n",
PTR_ERR(pout));
return PTR_ERR(pout);
}
ret = clk_enable(pout);
if (ret != 0) {
dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
ret);
clk_put(pout);
return ret;
}
dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
clk_get_rate(pout));
}
return 0;
}
static int zylonite_remove(struct platform_device *pdev)
{
if (clk_pout) {
clk_disable(pout);
clk_put(pout);
}
return 0;
}
static int zylonite_suspend_post(struct platform_device *pdev,
pm_message_t state)
{
if (clk_pout)
clk_disable(pout);
return 0;
}
static int zylonite_resume_pre(struct platform_device *pdev)
{
int ret = 0;
if (clk_pout) {
ret = clk_enable(pout);
if (ret != 0)
dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
ret);
}
return ret;
}
static struct snd_soc_card zylonite = {
.name = "Zylonite",
.probe = &zylonite_probe,
.remove = &zylonite_remove,
.suspend_post = &zylonite_suspend_post,
.resume_pre = &zylonite_resume_pre,
.dai_link = zylonite_dai,
.num_links = ARRAY_SIZE(zylonite_dai),
.owner = THIS_MODULE,
};
static struct platform_device *zylonite_snd_ac97_device;
static int __init zylonite_init(void)
{
int ret;
zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
if (!zylonite_snd_ac97_device)
return -ENOMEM;
platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
ret = platform_device_add(zylonite_snd_ac97_device);
if (ret != 0)
platform_device_put(zylonite_snd_ac97_device);
return ret;
}
static void __exit zylonite_exit(void)
{
platform_device_unregister(zylonite_snd_ac97_device);
}
module_init(zylonite_init);
module_exit(zylonite_exit);
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
MODULE_LICENSE("GPL");
|
