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
|
/*
* omap3evm.c -- ALSA SoC support for OMAP3 EVM
*
* Author: Anuj Aggarwal <anuj.aggarwal@ti.com>
*
* Based on sound/soc/omap/beagle.c by Steve Sakoman
*
* Copyright (C) 2008 Texas Instruments, Incorporated
*
* 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 version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
* whether express or implied; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
#include <plat/mcbsp.h>
#include "omap-mcbsp.h"
#include "omap-pcm.h"
static int omap3evm_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;
int 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 omap3evm_ops = {
.hw_params = omap3evm_hw_params,
};
/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link omap3evm_dai = {
.name = "TWL4030",
.stream_name = "TWL4030",
.cpu_dai_name = "omap-mcbsp.2",
.codec_dai_name = "twl4030-hifi",
.platform_name = "omap-pcm-audio",
.codec_name = "twl4030-codec",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM,
.ops = &omap3evm_ops,
};
/* Audio machine driver */
static struct snd_soc_card snd_soc_omap3evm = {
.name = "omap3evm",
.owner = THIS_MODULE,
.dai_link = &omap3evm_dai,
.num_links = 1,
};
static struct platform_device *omap3evm_snd_device;
static int __init omap3evm_soc_init(void)
{
int ret;
if (!machine_is_omap3evm())
return -ENODEV;
pr_info("OMAP3 EVM SoC init\n");
omap3evm_snd_device = platform_device_alloc("soc-audio", -1);
if (!omap3evm_snd_device) {
printk(KERN_ERR "Platform device allocation failed\n");
return -ENOMEM;
}
platform_set_drvdata(omap3evm_snd_device, &snd_soc_omap3evm);
ret = platform_device_add(omap3evm_snd_device);
if (ret)
goto err1;
return 0;
err1:
printk(KERN_ERR "Unable to add platform device\n");
platform_device_put(omap3evm_snd_device);
return ret;
}
static void __exit omap3evm_soc_exit(void)
{
platform_device_unregister(omap3evm_snd_device);
}
module_init(omap3evm_soc_init);
module_exit(omap3evm_soc_exit);
MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
MODULE_DESCRIPTION("ALSA SoC OMAP3 EVM");
MODULE_LICENSE("GPL v2");
|
