sound/soc/omap/omap2evm.c

   1 /*
   2  * omap2evm.c  --  SoC audio machine driver for omap2evm board
   3  *
   4  * Author: Arun KS <arunks@mistralsolutions.com>
   5  *
   6  * Based on sound/soc/omap/overo.c by Steve Sakoman
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/clk.h>
  25 #include <linux/platform_device.h>
  26 #include <sound/core.h>
  27 #include <sound/pcm.h>
  28 #include <sound/soc.h>
  29 #include <sound/soc-dapm.h>
  30
  31 #include <asm/mach-types.h>
  32 #include <mach/hardware.h>
  33 #include <mach/gpio.h>
  34 #include <mach/mcbsp.h>
  35
  36 #include "omap-mcbsp.h"
  37 #include "omap-pcm.h"
  38 #include "../codecs/twl4030.h"
  39
  40 static int omap2evm_hw_params(struct snd_pcm_substream *substream,
  41         struct snd_pcm_hw_params *params)
  42 {
  43         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  44         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  45         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  46         int ret;
  47
  48         /* Set codec DAI configuration */
  49         ret = snd_soc_dai_set_fmt(codec_dai,
  50                                   SND_SOC_DAIFMT_I2S |
  51                                   SND_SOC_DAIFMT_NB_NF |
  52                                   SND_SOC_DAIFMT_CBM_CFM);
  53         if (ret < 0) {
  54                 printk(KERN_ERR "can't set codec DAI configuration\n");
  55                 return ret;
  56         }
  57
  58         /* Set cpu DAI configuration */
  59         ret = snd_soc_dai_set_fmt(cpu_dai,
  60                                   SND_SOC_DAIFMT_I2S |
  61                                   SND_SOC_DAIFMT_NB_NF |
  62                                   SND_SOC_DAIFMT_CBM_CFM);
  63         if (ret < 0) {
  64                 printk(KERN_ERR "can't set cpu DAI configuration\n");
  65                 return ret;
  66         }
  67
  68         /* Set the codec system clock for DAC and ADC */
  69         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  70                                             SND_SOC_CLOCK_IN);
  71         if (ret < 0) {
  72                 printk(KERN_ERR "can't set codec system clock\n");
  73                 return ret;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static struct snd_soc_ops omap2evm_ops = {
  80         .hw_params = omap2evm_hw_params,
  81 };
  82
  83 /* Digital audio interface glue - connects codec <--> CPU */
  84 static struct snd_soc_dai_link omap2evm_dai = {
  85         .name = "TWL4030",
  86         .stream_name = "TWL4030",
  87         .cpu_dai = &omap_mcbsp_dai[0],
  88         .codec_dai = &twl4030_dai,
  89         .ops = &omap2evm_ops,
  90 };
  91
  92 /* Audio machine driver */
  93 static struct snd_soc_card snd_soc_omap2evm = {
  94         .name = "omap2evm",
  95         .dai_link = &omap2evm_dai,
  96         .num_links = 1,
  97 };
  98
  99 /* Audio subsystem */
 100 static struct snd_soc_device omap2evm_snd_devdata = {
 101         .card = &snd_soc_omap2evm,
 102         .platform = &omap_soc_platform,
 103         .codec_dev = &soc_codec_dev_twl4030,
 104 };
 105
 106 static struct platform_device *omap2evm_snd_device;
 107
 108 static int __init omap2evm_soc_init(void)
 109 {
 110         int ret;
 111
 112         if (!machine_is_omap2evm()) {
 113                 pr_debug("Not omap2evm!\n");
 114                 return -ENODEV;
 115         }
 116         printk(KERN_INFO "omap2evm SoC init\n");
 117
 118         omap2evm_snd_device = platform_device_alloc("soc-audio", -1);
 119         if (!omap2evm_snd_device) {
 120                 printk(KERN_ERR "Platform device allocation failed\n");
 121                 return -ENOMEM;
 122         }
 123
 124         platform_set_drvdata(omap2evm_snd_device, &omap2evm_snd_devdata);
 125         omap2evm_snd_devdata.dev = &omap2evm_snd_device->dev;
 126         *(unsigned int *)omap2evm_dai.cpu_dai->private_data = 1; /* McBSP2 */
 127
 128         ret = platform_device_add(omap2evm_snd_device);
 129         if (ret)
 130                 goto err1;
 131
 132         return 0;
 133
 134 err1:
 135         printk(KERN_ERR "Unable to add platform device\n");
 136         platform_device_put(omap2evm_snd_device);
 137
 138         return ret;
 139 }
 140 module_init(omap2evm_soc_init);
 141
 142 static void __exit omap2evm_soc_exit(void)
 143 {
 144         platform_device_unregister(omap2evm_snd_device);
 145 }
 146 module_exit(omap2evm_soc_exit);
 147
 148 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 149 MODULE_DESCRIPTION("ALSA SoC omap2evm");
 150 MODULE_LICENSE("GPL");