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
|
/*
* linux/sound/soc/pxa/z2.c
*
* SoC Audio driver for Aeronix Zipit Z2
*
* Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
* Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/audio.h>
#include <mach/z2.h>
#include "../codecs/wm8750.h"
#include "pxa2xx-i2s.h"
static struct snd_soc_card snd_soc_z2;
static int z2_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 clk = 0;
int ret = 0;
switch (params_rate(params)) {
case 8000:
case 16000:
case 48000:
case 96000:
clk = 12288000;
break;
case 11025:
case 22050:
case 44100:
clk = 11289600;
break;
}
/* set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set the I2S system clock as input (unused) */
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_jack hs_jack;
/* Headset jack detection DAPM pins */
static struct snd_soc_jack_pin hs_jack_pins[] = {
{
.pin = "Mic Jack",
.mask = SND_JACK_MICROPHONE,
},
{
.pin = "Headphone Jack",
.mask = SND_JACK_HEADPHONE,
},
{
.pin = "Ext Spk",
.mask = SND_JACK_HEADPHONE,
.invert = 1
},
};
/* Headset jack detection gpios */
static struct snd_soc_jack_gpio hs_jack_gpios[] = {
{
.gpio = GPIO37_ZIPITZ2_HEADSET_DETECT,
.name = "hsdet-gpio",
.report = SND_JACK_HEADSET,
.debounce_time = 200,
.invert = 1,
},
};
/* z2 machine dapm widgets */
static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
/* headset is a mic and mono headphone */
SND_SOC_DAPM_HP("Headset Jack", NULL),
};
/* Z2 machine audio_map */
static const struct snd_soc_dapm_route z2_audio_map[] = {
/* headphone connected to LOUT1, ROUT1 */
{"Headphone Jack", NULL, "LOUT1"},
{"Headphone Jack", NULL, "ROUT1"},
/* ext speaker connected to LOUT2, ROUT2 */
{"Ext Spk", NULL, "ROUT2"},
{"Ext Spk", NULL, "LOUT2"},
/* mic is connected to R input 2 - with bias */
{"RINPUT2", NULL, "Mic Bias"},
{"Mic Bias", NULL, "Mic Jack"},
};
/*
* Logic for a wm8750 as connected on a Z2 Device
*/
static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
{
int ret;
/* Jack detection API stuff */
ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
&hs_jack, hs_jack_pins,
ARRAY_SIZE(hs_jack_pins));
if (ret)
goto err;
ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
hs_jack_gpios);
if (ret)
goto err;
return 0;
err:
return ret;
}
static struct snd_soc_ops z2_ops = {
.hw_params = z2_hw_params,
};
/* z2 digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link z2_dai = {
.name = "wm8750",
.stream_name = "WM8750",
.cpu_dai_name = "pxa2xx-i2s",
.codec_dai_name = "wm8750-hifi",
.platform_name = "pxa-pcm-audio",
.codec_name = "wm8750.0-001b",
.init = z2_wm8750_init,
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &z2_ops,
};
/* z2 audio machine driver */
static struct snd_soc_card snd_soc_z2 = {
.name = "Z2",
.owner = THIS_MODULE,
.dai_link = &z2_dai,
.num_links = 1,
.dapm_widgets = wm8750_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
.dapm_routes = z2_audio_map,
.num_dapm_routes = ARRAY_SIZE(z2_audio_map),
.fully_routed = true,
};
static struct platform_device *z2_snd_device;
static int __init z2_init(void)
{
int ret;
if (!machine_is_zipit2())
return -ENODEV;
z2_snd_device = platform_device_alloc("soc-audio", -1);
if (!z2_snd_device)
return -ENOMEM;
platform_set_drvdata(z2_snd_device, &snd_soc_z2);
ret = platform_device_add(z2_snd_device);
if (ret)
platform_device_put(z2_snd_device);
return ret;
}
static void __exit z2_exit(void)
{
platform_device_unregister(z2_snd_device);
}
module_init(z2_init);
module_exit(z2_exit);
MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
"Marek Vasut <marek.vasut@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
MODULE_LICENSE("GPL");
|