1/*
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>
22#include <sound/core.h>
23#include <sound/pcm.h>
24#include <sound/soc.h>
25
26#include <asm/mach-types.h>
27#include <mach/hardware.h>
28#include <mach/gpio.h>
29#include <plat/mcbsp.h>
30
31#include "omap-mcbsp.h"
32#include "omap-pcm.h"
33
34static int omap3evm_hw_params(struct snd_pcm_substream *substream,
35	struct snd_pcm_hw_params *params)
36{
37	struct snd_soc_pcm_runtime *rtd = substream->private_data;
38	struct snd_soc_dai *codec_dai = rtd->codec_dai;
39	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
40	int ret;
41
42	/* Set codec DAI configuration */
43	ret = snd_soc_dai_set_fmt(codec_dai,
44				  SND_SOC_DAIFMT_I2S |
45				  SND_SOC_DAIFMT_NB_NF |
46				  SND_SOC_DAIFMT_CBM_CFM);
47	if (ret < 0) {
48		printk(KERN_ERR "Can't set codec DAI configuration\n");
49		return ret;
50	}
51
52	/* Set cpu DAI configuration */
53	ret = snd_soc_dai_set_fmt(cpu_dai,
54				  SND_SOC_DAIFMT_I2S |
55				  SND_SOC_DAIFMT_NB_NF |
56				  SND_SOC_DAIFMT_CBM_CFM);
57	if (ret < 0) {
58		printk(KERN_ERR "Can't set cpu DAI configuration\n");
59		return ret;
60	}
61
62	/* Set the codec system clock for DAC and ADC */
63	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
64				     SND_SOC_CLOCK_IN);
65	if (ret < 0) {
66		printk(KERN_ERR "Can't set codec system clock\n");
67		return ret;
68	}
69
70	return 0;
71}
72
73static struct snd_soc_ops omap3evm_ops = {
74	.hw_params = omap3evm_hw_params,
75};
76
77/* Digital audio interface glue - connects codec <--> CPU */
78static struct snd_soc_dai_link omap3evm_dai = {
79	.name 		= "TWL4030",
80	.stream_name 	= "TWL4030",
81	.cpu_dai_name = "omap-mcbsp-dai.1",
82	.codec_dai_name = "twl4030-hifi",
83	.platform_name = "omap-pcm-audio",
84	.codec_name = "twl4030-codec",
85	.ops 		= &omap3evm_ops,
86};
87
88/* Audio machine driver */
89static struct snd_soc_card snd_soc_omap3evm = {
90	.name = "omap3evm",
91	.dai_link = &omap3evm_dai,
92	.num_links = 1,
93};
94
95static struct platform_device *omap3evm_snd_device;
96
97static int __init omap3evm_soc_init(void)
98{
99	int ret;
100
101	if (!machine_is_omap3evm())
102		return -ENODEV;
103	pr_info("OMAP3 EVM SoC init\n");
104
105	omap3evm_snd_device = platform_device_alloc("soc-audio", -1);
106	if (!omap3evm_snd_device) {
107		printk(KERN_ERR "Platform device allocation failed\n");
108		return -ENOMEM;
109	}
110
111	platform_set_drvdata(omap3evm_snd_device, &snd_soc_omap3evm);
112	ret = platform_device_add(omap3evm_snd_device);
113	if (ret)
114		goto err1;
115
116	return 0;
117
118err1:
119	printk(KERN_ERR "Unable to add platform device\n");
120	platform_device_put(omap3evm_snd_device);
121
122	return ret;
123}
124
125static void __exit omap3evm_soc_exit(void)
126{
127	platform_device_unregister(omap3evm_snd_device);
128}
129
130module_init(omap3evm_soc_init);
131module_exit(omap3evm_soc_exit);
132
133MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
134MODULE_DESCRIPTION("ALSA SoC OMAP3 EVM");
135MODULE_LICENSE("GPL v2");
136