2 * omap2evm.c -- SoC audio machine driver for omap2evm board
4 * Author: Arun KS <arunks@mistralsolutions.com>
6 * Based on sound/soc/omap/overo.c by Steve Sakoman
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
24 #include <linux/clk.h>
25 #include <linux/platform_device.h>
26 #include <sound/core.h>
27 #include <sound/pcm.h>
28 #include <sound/soc.h>
29 #include <sound/soc-dapm.h>
31 #include <asm/mach-types.h>
32 #include <mach/hardware.h>
33 #include <mach/gpio.h>
34 #include <plat/mcbsp.h>
36 #include "omap-mcbsp.h"
38 #include "../codecs/twl4030.h"
40 static int omap2evm_hw_params(struct snd_pcm_substream
*substream
,
41 struct snd_pcm_hw_params
*params
,
42 struct snd_soc_dai
*dai
)
44 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
45 struct snd_soc_dai
*codec_dai
= rtd
->dai
->codec_dai
;
46 struct snd_soc_dai
*cpu_dai
= rtd
->dai
->cpu_dai
;
49 /* Set codec DAI configuration */
50 ret
= snd_soc_dai_set_fmt(codec_dai
,
52 SND_SOC_DAIFMT_NB_NF
|
53 SND_SOC_DAIFMT_CBM_CFM
);
55 printk(KERN_ERR
"can't set codec DAI configuration\n");
59 /* Set cpu DAI configuration */
60 ret
= snd_soc_dai_set_fmt(cpu_dai
,
62 SND_SOC_DAIFMT_NB_NF
|
63 SND_SOC_DAIFMT_CBM_CFM
);
65 printk(KERN_ERR
"can't set cpu DAI configuration\n");
69 /* Set the codec system clock for DAC and ADC */
70 ret
= snd_soc_dai_set_sysclk(codec_dai
, 0, 26000000,
73 printk(KERN_ERR
"can't set codec system clock\n");
80 static struct snd_soc_ops omap2evm_ops
= {
81 .hw_params
= omap2evm_hw_params
,
84 /* Digital audio interface glue - connects codec <--> CPU */
85 static struct snd_soc_dai_link omap2evm_dai
= {
87 .stream_name
= "TWL4030",
88 .cpu_dai
= &omap_mcbsp_dai
[0],
89 .codec_dai
= &twl4030_dai
[TWL4030_DAI_HIFI
],
93 /* Audio machine driver */
94 static struct snd_soc_card snd_soc_omap2evm
= {
96 .platform
= &omap_soc_platform
,
97 .dai_link
= &omap2evm_dai
,
101 /* Audio subsystem */
102 static struct snd_soc_device omap2evm_snd_devdata
= {
103 .card
= &snd_soc_omap2evm
,
104 .codec_dev
= &soc_codec_dev_twl4030
,
107 static struct platform_device
*omap2evm_snd_device
;
109 static int __init
omap2evm_soc_init(void)
113 if (!machine_is_omap2evm()) {
114 pr_debug("Not omap2evm!\n");
117 printk(KERN_INFO
"omap2evm SoC init\n");
119 omap2evm_snd_device
= platform_device_alloc("soc-audio", -1);
120 if (!omap2evm_snd_device
) {
121 printk(KERN_ERR
"Platform device allocation failed\n");
125 platform_set_drvdata(omap2evm_snd_device
, &omap2evm_snd_devdata
);
126 omap2evm_snd_devdata
.dev
= &omap2evm_snd_device
->dev
;
127 *(unsigned int *)omap2evm_dai
.cpu_dai
->private_data
= 1; /* McBSP2 */
129 ret
= platform_device_add(omap2evm_snd_device
);
136 printk(KERN_ERR
"Unable to add platform device\n");
137 platform_device_put(omap2evm_snd_device
);
141 module_init(omap2evm_soc_init
);
143 static void __exit
omap2evm_soc_exit(void)
145 platform_device_unregister(omap2evm_snd_device
);
147 module_exit(omap2evm_soc_exit
);
149 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
150 MODULE_DESCRIPTION("ALSA SoC omap2evm");
151 MODULE_LICENSE("GPL");