2 * overo.c -- SoC audio for Gumstix Overo
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 <mach/mcbsp.h>
34 #include "omap-mcbsp.h"
36 #include "../codecs/twl4030.h"
38 static int overo_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;
46 /* Set codec DAI configuration */
47 ret = snd_soc_dai_set_fmt(codec_dai,
49 SND_SOC_DAIFMT_NB_NF |
50 SND_SOC_DAIFMT_CBM_CFM);
52 printk(KERN_ERR "can't set codec DAI configuration\n");
56 /* Set cpu DAI configuration */
57 ret = snd_soc_dai_set_fmt(cpu_dai,
59 SND_SOC_DAIFMT_NB_NF |
60 SND_SOC_DAIFMT_CBM_CFM);
62 printk(KERN_ERR "can't set cpu DAI configuration\n");
66 /* Set the codec system clock for DAC and ADC */
67 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
70 printk(KERN_ERR "can't set codec system clock\n");
77 static struct snd_soc_ops overo_ops = {
78 .hw_params = overo_hw_params,
81 /* Digital audio interface glue - connects codec <--> CPU */
82 static struct snd_soc_dai_link overo_dai = {
84 .stream_name = "TWL4030",
85 .cpu_dai = &omap_mcbsp_dai[0],
86 .codec_dai = &twl4030_dai,
90 /* Audio machine driver */
91 static struct snd_soc_card snd_soc_card_overo = {
93 .platform = &omap_soc_platform,
94 .dai_link = &overo_dai,
99 static struct snd_soc_device overo_snd_devdata = {
100 .card = &snd_soc_card_overo,
101 .codec_dev = &soc_codec_dev_twl4030,
104 static struct platform_device *overo_snd_device;
106 static int __init overo_soc_init(void)
110 if (!machine_is_overo()) {
111 pr_debug("Not Overo!\n");
114 printk(KERN_INFO "overo SoC init\n");
116 overo_snd_device = platform_device_alloc("soc-audio", -1);
117 if (!overo_snd_device) {
118 printk(KERN_ERR "Platform device allocation failed\n");
122 platform_set_drvdata(overo_snd_device, &overo_snd_devdata);
123 overo_snd_devdata.dev = &overo_snd_device->dev;
124 *(unsigned int *)overo_dai.cpu_dai->private_data = 1; /* McBSP2 */
126 ret = platform_device_add(overo_snd_device);
133 printk(KERN_ERR "Unable to add platform device\n");
134 platform_device_put(overo_snd_device);
138 module_init(overo_soc_init);
140 static void __exit overo_soc_exit(void)
142 platform_device_unregister(overo_snd_device);
144 module_exit(overo_soc_exit);
146 MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
147 MODULE_DESCRIPTION("ALSA SoC overo");
148 MODULE_LICENSE("GPL");