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
|
/*
* omap2evm.c -- SoC audio machine driver for omap2evm board
*
* Author: Arun KS <arunks@mistralsolutions.com>
*
* Based on sound/soc/omap/overo.c by Steve Sakoman
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
#include <mach/mcbsp.h>
#include "omap-mcbsp.h"
#include "omap-pcm.h"
#include "../codecs/twl4030.h"
static int omap2evm_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->dai->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
int ret;
/* Set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0) {
printk(KERN_ERR "can't set codec DAI configuration\n");
return ret;
}
/* Set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0) {
printk(KERN_ERR "can't set cpu DAI configuration\n");
return ret;
}
/* Set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
SND_SOC_CLOCK_IN);
if (ret < 0) {
printk(KERN_ERR "can't set codec system clock\n");
return ret;
}
return 0;
}
static struct snd_soc_ops omap2evm_ops = {
.hw_params = omap2evm_hw_params,
};
/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link omap2evm_dai = {
.name = "TWL4030",
.stream_name = "TWL4030",
.cpu_dai = &omap_mcbsp_dai[0],
.codec_dai = &twl4030_dai,
.ops = &omap2evm_ops,
};
/* Audio machine driver */
static struct snd_soc_machine snd_soc_machine_omap2evm = {
.name = "omap2evm",
.dai_link = &omap2evm_dai,
.num_links = 1,
};
/* Audio subsystem */
static struct snd_soc_device omap2evm_snd_devdata = {
.machine = &snd_soc_machine_omap2evm,
.platform = &omap_soc_platform,
.codec_dev = &soc_codec_dev_twl4030,
};
static struct platform_device *omap2evm_snd_device;
static int __init omap2evm_soc_init(void)
{
int ret;
if (!machine_is_omap2evm()) {
pr_debug("Not omap2evm!\n");
return -ENODEV;
}
printk(KERN_INFO "omap2evm SoC init\n");
omap2evm_snd_device = platform_device_alloc("soc-audio", -1);
if (!omap2evm_snd_device) {
printk(KERN_ERR "Platform device allocation failed\n");
return -ENOMEM;
}
platform_set_drvdata(omap2evm_snd_device, &omap2evm_snd_devdata);
omap2evm_snd_devdata.dev = &omap2evm_snd_device->dev;
*(unsigned int *)omap2evm_dai.cpu_dai->private_data = 1; /* McBSP2 */
ret = platform_device_add(omap2evm_snd_device);
if (ret)
goto err1;
return 0;
err1:
printk(KERN_ERR "Unable to add platform device\n");
platform_device_put(omap2evm_snd_device);
return ret;
}
module_init(omap2evm_soc_init);
static void __exit omap2evm_soc_exit(void)
{
platform_device_unregister(omap2evm_snd_device);
}
module_exit(omap2evm_soc_exit);
MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
MODULE_DESCRIPTION("ALSA SoC omap2evm");
MODULE_LICENSE("GPL");
|
