sound/soc/omap/igep0020.c

   1 /*
   2  * igep0020.c  --  SoC audio for IGEP v2
   3  *
   4  * Based on sound/soc/omap/overo.c by Steve Sakoman
   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 <linux/module.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/soc.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
  37 static int igep2_hw_params(struct snd_pcm_substream *substream,
  38         struct snd_pcm_hw_params *params)
  39 {
  40         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  41         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  42         int ret;
  43
  44         /* Set the codec system clock for DAC and ADC */
  45         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  46                                             SND_SOC_CLOCK_IN);
  47         if (ret < 0) {
  48                 printk(KERN_ERR "can't set codec system clock\n");
  49                 return ret;
  50         }
  51
  52         return 0;
  53 }
  54
  55 static struct snd_soc_ops igep2_ops = {
  56         .hw_params = igep2_hw_params,
  57 };
  58
  59 /* Digital audio interface glue - connects codec <--> CPU */
  60 static struct snd_soc_dai_link igep2_dai = {
  61         .name = "TWL4030",
  62         .stream_name = "TWL4030",
  63         .cpu_dai_name = "omap-mcbsp-dai.1",
  64         .codec_dai_name = "twl4030-hifi",
  65         .platform_name = "omap-pcm-audio",
  66         .codec_name = "twl4030-codec",
  67         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  68                    SND_SOC_DAIFMT_CBM_CFM,
  69         .ops = &igep2_ops,
  70 };
  71
  72 /* Audio machine driver */
  73 static struct snd_soc_card snd_soc_card_igep2 = {
  74         .name = "igep2",
  75         .owner = THIS_MODULE,
  76         .dai_link = &igep2_dai,
  77         .num_links = 1,
  78 };
  79
  80 static struct platform_device *igep2_snd_device;
  81
  82 static int __init igep2_soc_init(void)
  83 {
  84         int ret;
  85
  86         if (!machine_is_igep0020())
  87                 return -ENODEV;
  88         printk(KERN_INFO "IGEP v2 SoC init\n");
  89
  90         igep2_snd_device = platform_device_alloc("soc-audio", -1);
  91         if (!igep2_snd_device) {
  92                 printk(KERN_ERR "Platform device allocation failed\n");
  93                 return -ENOMEM;
  94         }
  95
  96         platform_set_drvdata(igep2_snd_device, &snd_soc_card_igep2);
  97
  98         ret = platform_device_add(igep2_snd_device);
  99         if (ret)
 100                 goto err1;
 101
 102         return 0;
 103
 104 err1:
 105         printk(KERN_ERR "Unable to add platform device\n");
 106         platform_device_put(igep2_snd_device);
 107
 108         return ret;
 109 }
 110 module_init(igep2_soc_init);
 111
 112 static void __exit igep2_soc_exit(void)
 113 {
 114         platform_device_unregister(igep2_snd_device);
 115 }
 116 module_exit(igep2_soc_exit);
 117
 118 MODULE_AUTHOR("Enric Balletbo i Serra <eballetbo@iseebcn.com>");
 119 MODULE_DESCRIPTION("ALSA SoC IGEP v2");
 120 MODULE_LICENSE("GPL");