Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
[linux-2.6] / sound / soc / omap / sdp3430.c
1 /*
2  * sdp3430.c  --  SoC audio for TI OMAP3430 SDP
3  *
4  * Author: Misael Lopez Cruz <x0052729@ti.com>
5  *
6  * Based on:
7  * Author: Steve Sakoman <steve@sakoman.com>
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License
11  * version 2 as published by the Free Software Foundation.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21  * 02110-1301 USA
22  *
23  */
24
25 #include <linux/clk.h>
26 #include <linux/platform_device.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29 #include <sound/soc.h>
30 #include <sound/soc-dapm.h>
31
32 #include <asm/mach-types.h>
33 #include <mach/hardware.h>
34 #include <mach/gpio.h>
35 #include <mach/mcbsp.h>
36
37 #include "omap-mcbsp.h"
38 #include "omap-pcm.h"
39 #include "../codecs/twl4030.h"
40
41 static int sdp3430_hw_params(struct snd_pcm_substream *substream,
42         struct snd_pcm_hw_params *params)
43 {
44         struct snd_soc_pcm_runtime *rtd = substream->private_data;
45         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
46         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
47         int ret;
48
49         /* Set codec DAI configuration */
50         ret = snd_soc_dai_set_fmt(codec_dai,
51                                   SND_SOC_DAIFMT_I2S |
52                                   SND_SOC_DAIFMT_NB_NF |
53                                   SND_SOC_DAIFMT_CBM_CFM);
54         if (ret < 0) {
55                 printk(KERN_ERR "can't set codec DAI configuration\n");
56                 return ret;
57         }
58
59         /* Set cpu DAI configuration */
60         ret = snd_soc_dai_set_fmt(cpu_dai,
61                                   SND_SOC_DAIFMT_I2S |
62                                   SND_SOC_DAIFMT_NB_NF |
63                                   SND_SOC_DAIFMT_CBM_CFM);
64         if (ret < 0) {
65                 printk(KERN_ERR "can't set cpu DAI configuration\n");
66                 return ret;
67         }
68
69         /* Set the codec system clock for DAC and ADC */
70         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
71                                             SND_SOC_CLOCK_IN);
72         if (ret < 0) {
73                 printk(KERN_ERR "can't set codec system clock\n");
74                 return ret;
75         }
76
77         return 0;
78 }
79
80 static struct snd_soc_ops sdp3430_ops = {
81         .hw_params = sdp3430_hw_params,
82 };
83
84 /* Digital audio interface glue - connects codec <--> CPU */
85 static struct snd_soc_dai_link sdp3430_dai = {
86         .name = "TWL4030",
87         .stream_name = "TWL4030",
88         .cpu_dai = &omap_mcbsp_dai[0],
89         .codec_dai = &twl4030_dai,
90         .ops = &sdp3430_ops,
91 };
92
93 /* Audio machine driver */
94 static struct snd_soc_card snd_soc_sdp3430 = {
95         .name = "SDP3430",
96         .platform = &omap_soc_platform,
97         .dai_link = &sdp3430_dai,
98         .num_links = 1,
99 };
100
101 /* Audio subsystem */
102 static struct snd_soc_device sdp3430_snd_devdata = {
103         .card = &snd_soc_sdp3430,
104         .codec_dev = &soc_codec_dev_twl4030,
105 };
106
107 static struct platform_device *sdp3430_snd_device;
108
109 static int __init sdp3430_soc_init(void)
110 {
111         int ret;
112
113         if (!machine_is_omap_3430sdp()) {
114                 pr_debug("Not SDP3430!\n");
115                 return -ENODEV;
116         }
117         printk(KERN_INFO "SDP3430 SoC init\n");
118
119         sdp3430_snd_device = platform_device_alloc("soc-audio", -1);
120         if (!sdp3430_snd_device) {
121                 printk(KERN_ERR "Platform device allocation failed\n");
122                 return -ENOMEM;
123         }
124
125         platform_set_drvdata(sdp3430_snd_device, &sdp3430_snd_devdata);
126         sdp3430_snd_devdata.dev = &sdp3430_snd_device->dev;
127         *(unsigned int *)sdp3430_dai.cpu_dai->private_data = 1; /* McBSP2 */
128
129         ret = platform_device_add(sdp3430_snd_device);
130         if (ret)
131                 goto err1;
132
133         return 0;
134
135 err1:
136         printk(KERN_ERR "Unable to add platform device\n");
137         platform_device_put(sdp3430_snd_device);
138
139         return ret;
140 }
141 module_init(sdp3430_soc_init);
142
143 static void __exit sdp3430_soc_exit(void)
144 {
145         platform_device_unregister(sdp3430_snd_device);
146 }
147 module_exit(sdp3430_soc_exit);
148
149 MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
150 MODULE_DESCRIPTION("ALSA SoC SDP3430");
151 MODULE_LICENSE("GPL");
152