2 * omap3beagle.c -- SoC audio for OMAP3 Beagle
4 * Author: Steve Sakoman <steve@sakoman.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 #include <linux/clk.h>
23 #include <linux/platform_device.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dapm.h>
29 #include <asm/mach-types.h>
30 #include <mach/hardware.h>
31 #include <mach/gpio.h>
32 #include <plat/mcbsp.h>
34 #include "omap-mcbsp.h"
36 #include "../codecs/twl4030.h"
38 static int omap3beagle_hw_params(struct snd_pcm_substream
*substream
,
39 struct snd_pcm_hw_params
*params
)
41 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
42 struct snd_soc_dai
*codec_dai
= rtd
->dai
->codec_dai
;
43 struct snd_soc_dai
*cpu_dai
= rtd
->dai
->cpu_dai
;
47 switch (params_channels(params
)) {
48 case 2: /* Stereo I2S mode */
49 fmt
= SND_SOC_DAIFMT_I2S
|
50 SND_SOC_DAIFMT_NB_NF
|
51 SND_SOC_DAIFMT_CBM_CFM
;
53 case 4: /* Four channel TDM mode */
54 fmt
= SND_SOC_DAIFMT_DSP_A
|
55 SND_SOC_DAIFMT_IB_NF
|
56 SND_SOC_DAIFMT_CBM_CFM
;
62 /* Set codec DAI configuration */
63 ret
= snd_soc_dai_set_fmt(codec_dai
, fmt
);
65 printk(KERN_ERR
"can't set codec DAI configuration\n");
69 /* Set cpu DAI configuration */
70 ret
= snd_soc_dai_set_fmt(cpu_dai
, fmt
);
72 printk(KERN_ERR
"can't set cpu DAI configuration\n");
76 /* Set the codec system clock for DAC and ADC */
77 ret
= snd_soc_dai_set_sysclk(codec_dai
, 0, 26000000,
80 printk(KERN_ERR
"can't set codec system clock\n");
87 static struct snd_soc_ops omap3beagle_ops
= {
88 .hw_params
= omap3beagle_hw_params
,
91 /* Digital audio interface glue - connects codec <--> CPU */
92 static struct snd_soc_dai_link omap3beagle_dai
= {
94 .stream_name
= "TWL4030",
95 .cpu_dai
= &omap_mcbsp_dai
[0],
96 .codec_dai
= &twl4030_dai
[TWL4030_DAI_HIFI
],
97 .ops
= &omap3beagle_ops
,
100 /* Audio machine driver */
101 static struct snd_soc_card snd_soc_omap3beagle
= {
102 .name
= "omap3beagle",
103 .platform
= &omap_soc_platform
,
104 .dai_link
= &omap3beagle_dai
,
108 /* Audio subsystem */
109 static struct snd_soc_device omap3beagle_snd_devdata
= {
110 .card
= &snd_soc_omap3beagle
,
111 .codec_dev
= &soc_codec_dev_twl4030
,
114 static struct platform_device
*omap3beagle_snd_device
;
116 static int __init
omap3beagle_soc_init(void)
120 if (!machine_is_omap3_beagle() && !machine_is_ginger()) {
121 pr_debug("Not OMAP3 Beagle!\n");
124 pr_info("OMAP3 Beagle SoC init\n");
126 omap3beagle_snd_device
= platform_device_alloc("soc-audio", -1);
127 if (!omap3beagle_snd_device
) {
128 printk(KERN_ERR
"Platform device allocation failed\n");
132 platform_set_drvdata(omap3beagle_snd_device
, &omap3beagle_snd_devdata
);
133 omap3beagle_snd_devdata
.dev
= &omap3beagle_snd_device
->dev
;
134 *(unsigned int *)omap3beagle_dai
.cpu_dai
->private_data
= 1; /* McBSP2 */
136 ret
= platform_device_add(omap3beagle_snd_device
);
143 printk(KERN_ERR
"Unable to add platform device\n");
144 platform_device_put(omap3beagle_snd_device
);
149 static void __exit
omap3beagle_soc_exit(void)
151 platform_device_unregister(omap3beagle_snd_device
);
154 module_init(omap3beagle_soc_init
);
155 module_exit(omap3beagle_soc_exit
);
157 MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
158 MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle");
159 MODULE_LICENSE("GPL");