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>
28 #include <asm/mach-types.h>
29 #include <mach/hardware.h>
30 #include <mach/gpio.h>
31 #include <plat/mcbsp.h>
33 #include "omap-mcbsp.h"
36 static int overo_hw_params(struct snd_pcm_substream *substream,
37 struct snd_pcm_hw_params *params)
39 struct snd_soc_pcm_runtime *rtd = substream->private_data;
40 struct snd_soc_dai *codec_dai = rtd->codec_dai;
43 /* Set the codec system clock for DAC and ADC */
44 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
47 printk(KERN_ERR "can't set codec system clock\n");
54 static struct snd_soc_ops overo_ops = {
55 .hw_params = overo_hw_params,
58 /* Digital audio interface glue - connects codec <--> CPU */
59 static struct snd_soc_dai_link overo_dai = {
61 .stream_name = "TWL4030",
62 .cpu_dai_name = "omap-mcbsp-dai.1",
63 .codec_dai_name = "twl4030-hifi",
64 .platform_name = "omap-pcm-audio",
65 .codec_name = "twl4030-codec",
66 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
67 SND_SOC_DAIFMT_CBM_CFM,
71 /* Audio machine driver */
72 static struct snd_soc_card snd_soc_card_overo = {
74 .dai_link = &overo_dai,
78 static struct platform_device *overo_snd_device;
80 static int __init overo_soc_init(void)
84 if (!(machine_is_overo() || machine_is_cm_t35())) {
85 pr_debug("Incomatible machine!\n");
88 printk(KERN_INFO "overo SoC init\n");
90 overo_snd_device = platform_device_alloc("soc-audio", -1);
91 if (!overo_snd_device) {
92 printk(KERN_ERR "Platform device allocation failed\n");
96 platform_set_drvdata(overo_snd_device, &snd_soc_card_overo);
98 ret = platform_device_add(overo_snd_device);
105 printk(KERN_ERR "Unable to add platform device\n");
106 platform_device_put(overo_snd_device);
110 module_init(overo_soc_init);
112 static void __exit overo_soc_exit(void)
114 platform_device_unregister(overo_snd_device);
116 module_exit(overo_soc_exit);
118 MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
119 MODULE_DESCRIPTION("ALSA SoC overo");
120 MODULE_LICENSE("GPL");