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 <linux/module.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/soc.h>
26
27 #include <asm/mach-types.h>
28 #include <mach/hardware.h>
29 #include <mach/gpio.h>
30 #include <plat/mcbsp.h>
31
32 #include "omap-mcbsp.h"
33 #include "omap-pcm.h"
34
omap3evm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)35 static 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;
39 struct snd_soc_dai *codec_dai = rtd->codec_dai;
40 int ret;
41
42 /* 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
53 static struct snd_soc_ops omap3evm_ops = {
54 .hw_params = omap3evm_hw_params,
55 };
56
57 /* Digital audio interface glue - connects codec <--> CPU */
58 static struct snd_soc_dai_link omap3evm_dai = {
59 .name = "TWL4030",
60 .stream_name = "TWL4030",
61 .cpu_dai_name = "omap-mcbsp.2",
62 .codec_dai_name = "twl4030-hifi",
63 .platform_name = "omap-pcm-audio",
64 .codec_name = "twl4030-codec",
65 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
66 SND_SOC_DAIFMT_CBM_CFM,
67 .ops = &omap3evm_ops,
68 };
69
70 /* Audio machine driver */
71 static struct snd_soc_card snd_soc_omap3evm = {
72 .name = "omap3evm",
73 .owner = THIS_MODULE,
74 .dai_link = &omap3evm_dai,
75 .num_links = 1,
76 };
77
78 static struct platform_device *omap3evm_snd_device;
79
omap3evm_soc_init(void)80 static int __init omap3evm_soc_init(void)
81 {
82 int ret;
83
84 if (!machine_is_omap3evm())
85 return -ENODEV;
86 pr_info("OMAP3 EVM SoC init\n");
87
88 omap3evm_snd_device = platform_device_alloc("soc-audio", -1);
89 if (!omap3evm_snd_device) {
90 printk(KERN_ERR "Platform device allocation failed\n");
91 return -ENOMEM;
92 }
93
94 platform_set_drvdata(omap3evm_snd_device, &snd_soc_omap3evm);
95 ret = platform_device_add(omap3evm_snd_device);
96 if (ret)
97 goto err1;
98
99 return 0;
100
101 err1:
102 printk(KERN_ERR "Unable to add platform device\n");
103 platform_device_put(omap3evm_snd_device);
104
105 return ret;
106 }
107
omap3evm_soc_exit(void)108 static void __exit omap3evm_soc_exit(void)
109 {
110 platform_device_unregister(omap3evm_snd_device);
111 }
112
113 module_init(omap3evm_soc_init);
114 module_exit(omap3evm_soc_exit);
115
116 MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
117 MODULE_DESCRIPTION("ALSA SoC OMAP3 EVM");
118 MODULE_LICENSE("GPL v2");
119