omap: headers: Move remaining headers from include/mach to include/plat
[linux-2.6.git] / sound / soc / omap / overo.c
1 /*
2  * overo.c  --  SoC audio for Gumstix Overo
3  *
4  * Author: Steve Sakoman <steve@sakoman.com>
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 <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dapm.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 #include "../codecs/twl4030.h"
37
38 static int overo_hw_params(struct snd_pcm_substream *substream,
39         struct snd_pcm_hw_params *params)
40 {
41         struct snd_soc_pcm_runtime *rtd = substream->private_data;
42         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
43         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
44         int ret;
45
46         /* Set codec DAI configuration */
47         ret = snd_soc_dai_set_fmt(codec_dai,
48                                   SND_SOC_DAIFMT_I2S |
49                                   SND_SOC_DAIFMT_NB_NF |
50                                   SND_SOC_DAIFMT_CBM_CFM);
51         if (ret < 0) {
52                 printk(KERN_ERR "can't set codec DAI configuration\n");
53                 return ret;
54         }
55
56         /* Set cpu DAI configuration */
57         ret = snd_soc_dai_set_fmt(cpu_dai,
58                                   SND_SOC_DAIFMT_I2S |
59                                   SND_SOC_DAIFMT_NB_NF |
60                                   SND_SOC_DAIFMT_CBM_CFM);
61         if (ret < 0) {
62                 printk(KERN_ERR "can't set cpu DAI configuration\n");
63                 return ret;
64         }
65
66         /* Set the codec system clock for DAC and ADC */
67         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
68                                             SND_SOC_CLOCK_IN);
69         if (ret < 0) {
70                 printk(KERN_ERR "can't set codec system clock\n");
71                 return ret;
72         }
73
74         return 0;
75 }
76
77 static struct snd_soc_ops overo_ops = {
78         .hw_params = overo_hw_params,
79 };
80
81 /* Digital audio interface glue - connects codec <--> CPU */
82 static struct snd_soc_dai_link overo_dai = {
83         .name = "TWL4030",
84         .stream_name = "TWL4030",
85         .cpu_dai = &omap_mcbsp_dai[0],
86         .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
87         .ops = &overo_ops,
88 };
89
90 /* Audio machine driver */
91 static struct snd_soc_card snd_soc_card_overo = {
92         .name = "overo",
93         .platform = &omap_soc_platform,
94         .dai_link = &overo_dai,
95         .num_links = 1,
96 };
97
98 /* Audio subsystem */
99 static struct snd_soc_device overo_snd_devdata = {
100         .card = &snd_soc_card_overo,
101         .codec_dev = &soc_codec_dev_twl4030,
102 };
103
104 static struct platform_device *overo_snd_device;
105
106 static int __init overo_soc_init(void)
107 {
108         int ret;
109
110         if (!machine_is_overo()) {
111                 pr_debug("Not Overo!\n");
112                 return -ENODEV;
113         }
114         printk(KERN_INFO "overo SoC init\n");
115
116         overo_snd_device = platform_device_alloc("soc-audio", -1);
117         if (!overo_snd_device) {
118                 printk(KERN_ERR "Platform device allocation failed\n");
119                 return -ENOMEM;
120         }
121
122         platform_set_drvdata(overo_snd_device, &overo_snd_devdata);
123         overo_snd_devdata.dev = &overo_snd_device->dev;
124         *(unsigned int *)overo_dai.cpu_dai->private_data = 1; /* McBSP2 */
125
126         ret = platform_device_add(overo_snd_device);
127         if (ret)
128                 goto err1;
129
130         return 0;
131
132 err1:
133         printk(KERN_ERR "Unable to add platform device\n");
134         platform_device_put(overo_snd_device);
135
136         return ret;
137 }
138 module_init(overo_soc_init);
139
140 static void __exit overo_soc_exit(void)
141 {
142         platform_device_unregister(overo_snd_device);
143 }
144 module_exit(overo_soc_exit);
145
146 MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
147 MODULE_DESCRIPTION("ALSA SoC overo");
148 MODULE_LICENSE("GPL");