tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * igep0020.c -- SoC audio for IGEP v2
3 *
4 * Based on sound/soc/omap/overo.c by Steve Sakoman
5 *
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.
9 *
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.
14 *
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
18 * 02110-1301 USA
19 *
20 */
21
22#include <linux/clk.h>
23#include <linux/platform_device.h>
24#include <linux/module.h>
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/soc.h>
28
29#include <asm/mach-types.h>
30#include <mach/hardware.h>
31#include <mach/gpio.h>
32#include <plat/mcbsp.h>
33
34#include "omap-mcbsp.h"
35#include "omap-pcm.h"
36
37static int igep2_hw_params(struct snd_pcm_substream *substream,
38 struct snd_pcm_hw_params *params)
39{
40 struct snd_soc_pcm_runtime *rtd = substream->private_data;
41 struct snd_soc_dai *codec_dai = rtd->codec_dai;
42 int ret;
43
44 /* Set the codec system clock for DAC and ADC */
45 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
46 SND_SOC_CLOCK_IN);
47 if (ret < 0) {
48 printk(KERN_ERR "can't set codec system clock\n");
49 return ret;
50 }
51
52 return 0;
53}
54
55static struct snd_soc_ops igep2_ops = {
56 .hw_params = igep2_hw_params,
57};
58
59/* Digital audio interface glue - connects codec <--> CPU */
60static struct snd_soc_dai_link igep2_dai = {
61 .name = "TWL4030",
62 .stream_name = "TWL4030",
63 .cpu_dai_name = "omap-mcbsp.2",
64 .codec_dai_name = "twl4030-hifi",
65 .platform_name = "omap-pcm-audio",
66 .codec_name = "twl4030-codec",
67 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
68 SND_SOC_DAIFMT_CBM_CFM,
69 .ops = &igep2_ops,
70};
71
72/* Audio machine driver */
73static struct snd_soc_card snd_soc_card_igep2 = {
74 .name = "igep2",
75 .owner = THIS_MODULE,
76 .dai_link = &igep2_dai,
77 .num_links = 1,
78};
79
80static struct platform_device *igep2_snd_device;
81
82static int __init igep2_soc_init(void)
83{
84 int ret;
85
86 if (!machine_is_igep0020())
87 return -ENODEV;
88 printk(KERN_INFO "IGEP v2 SoC init\n");
89
90 igep2_snd_device = platform_device_alloc("soc-audio", -1);
91 if (!igep2_snd_device) {
92 printk(KERN_ERR "Platform device allocation failed\n");
93 return -ENOMEM;
94 }
95
96 platform_set_drvdata(igep2_snd_device, &snd_soc_card_igep2);
97
98 ret = platform_device_add(igep2_snd_device);
99 if (ret)
100 goto err1;
101
102 return 0;
103
104err1:
105 printk(KERN_ERR "Unable to add platform device\n");
106 platform_device_put(igep2_snd_device);
107
108 return ret;
109}
110module_init(igep2_soc_init);
111
112static void __exit igep2_soc_exit(void)
113{
114 platform_device_unregister(igep2_snd_device);
115}
116module_exit(igep2_soc_exit);
117
118MODULE_AUTHOR("Enric Balletbo i Serra <eballetbo@iseebcn.com>");
119MODULE_DESCRIPTION("ALSA SoC IGEP v2");
120MODULE_LICENSE("GPL");