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Anuj Aggarwal14610ce2009-05-14 13:59:19 +05301/*
2 * omap3evm.c -- ALSA SoC support for OMAP3 EVM
3 *
4 * Author: Anuj Aggarwal <anuj.aggarwal@ti.com>
5 *
6 * Based on sound/soc/omap/beagle.c by Steve Sakoman
7 *
8 * Copyright (C) 2008 Texas Instruments, Incorporated
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation version 2.
13 *
14 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
15 * whether express or implied; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 */
19
20#include <linux/clk.h>
21#include <linux/platform_device.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -040022#include <linux/module.h>
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053023#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/soc.h>
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053026
27#include <asm/mach-types.h>
28#include <mach/hardware.h>
29#include <mach/gpio.h>
Tony Lindgrence491cf2009-10-20 09:40:47 -070030#include <plat/mcbsp.h>
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053031
32#include "omap-mcbsp.h"
33#include "omap-pcm.h"
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053034
35static int omap3evm_hw_params(struct snd_pcm_substream *substream,
36 struct snd_pcm_hw_params *params)
37{
38 struct snd_soc_pcm_runtime *rtd = substream->private_data;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000039 struct snd_soc_dai *codec_dai = rtd->codec_dai;
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053040 int ret;
41
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053042 /* Set the codec system clock for DAC and ADC */
43 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
44 SND_SOC_CLOCK_IN);
45 if (ret < 0) {
46 printk(KERN_ERR "Can't set codec system clock\n");
47 return ret;
48 }
49
50 return 0;
51}
52
53static struct snd_soc_ops omap3evm_ops = {
54 .hw_params = omap3evm_hw_params,
55};
56
57/* Digital audio interface glue - connects codec <--> CPU */
58static struct snd_soc_dai_link omap3evm_dai = {
59 .name = "TWL4030",
60 .stream_name = "TWL4030",
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000061 .cpu_dai_name = "omap-mcbsp-dai.1",
62 .codec_dai_name = "twl4030-hifi",
63 .platform_name = "omap-pcm-audio",
64 .codec_name = "twl4030-codec",
Jarkko Nikulacf9feff2011-09-30 16:07:45 +030065 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
66 SND_SOC_DAIFMT_CBM_CFM,
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053067 .ops = &omap3evm_ops,
68};
69
70/* Audio machine driver */
71static struct snd_soc_card snd_soc_omap3evm = {
72 .name = "omap3evm",
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053073 .dai_link = &omap3evm_dai,
74 .num_links = 1,
75};
76
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053077static struct platform_device *omap3evm_snd_device;
78
79static int __init omap3evm_soc_init(void)
80{
81 int ret;
82
Jarkko Nikulaec588ae2010-10-06 16:47:26 +030083 if (!machine_is_omap3evm())
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053084 return -ENODEV;
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053085 pr_info("OMAP3 EVM SoC init\n");
86
87 omap3evm_snd_device = platform_device_alloc("soc-audio", -1);
88 if (!omap3evm_snd_device) {
89 printk(KERN_ERR "Platform device allocation failed\n");
90 return -ENOMEM;
91 }
92
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000093 platform_set_drvdata(omap3evm_snd_device, &snd_soc_omap3evm);
Anuj Aggarwal14610ce2009-05-14 13:59:19 +053094 ret = platform_device_add(omap3evm_snd_device);
95 if (ret)
96 goto err1;
97
98 return 0;
99
100err1:
101 printk(KERN_ERR "Unable to add platform device\n");
102 platform_device_put(omap3evm_snd_device);
103
104 return ret;
105}
106
107static void __exit omap3evm_soc_exit(void)
108{
109 platform_device_unregister(omap3evm_snd_device);
110}
111
112module_init(omap3evm_soc_init);
113module_exit(omap3evm_soc_exit);
114
115MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
116MODULE_DESCRIPTION("ALSA SoC OMAP3 EVM");
Anuj Aggarwalbd6ddcb2009-11-17 21:43:42 +0530117MODULE_LICENSE("GPL v2");