sound/soc/omap/omap3evm.c

   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 <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/soc.h>
  25
  26 #include <asm/mach-types.h>
  27 #include <mach/hardware.h>
  28 #include <mach/gpio.h>
  29 #include <plat/mcbsp.h>
  30
  31 #include "omap-mcbsp.h"
  32 #include "omap-pcm.h"
  33
  34 static int omap3evm_hw_params(struct snd_pcm_substream *substream,
  35         struct snd_pcm_hw_params *params)
  36 {
  37         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  38         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  39         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  40         int ret;
  41
  42         /* Set codec DAI configuration */
  43         ret = snd_soc_dai_set_fmt(codec_dai,
  44                                   SND_SOC_DAIFMT_I2S |
  45                                   SND_SOC_DAIFMT_NB_NF |
  46                                   SND_SOC_DAIFMT_CBM_CFM);
  47         if (ret < 0) {
  48                 printk(KERN_ERR "Can't set codec DAI configuration\n");
  49                 return ret;
  50         }
  51
  52         /* Set cpu DAI configuration */
  53         ret = snd_soc_dai_set_fmt(cpu_dai,
  54                                   SND_SOC_DAIFMT_I2S |
  55                                   SND_SOC_DAIFMT_NB_NF |
  56                                   SND_SOC_DAIFMT_CBM_CFM);
  57         if (ret < 0) {
  58                 printk(KERN_ERR "Can't set cpu DAI configuration\n");
  59                 return ret;
  60         }
  61
  62         /* Set the codec system clock for DAC and ADC */
  63         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  64                                      SND_SOC_CLOCK_IN);
  65         if (ret < 0) {
  66                 printk(KERN_ERR "Can't set codec system clock\n");
  67                 return ret;
  68         }
  69
  70         return 0;
  71 }
  72
  73 static struct snd_soc_ops omap3evm_ops = {
  74         .hw_params = omap3evm_hw_params,
  75 };
  76
  77 /* Digital audio interface glue - connects codec <--> CPU */
  78 static struct snd_soc_dai_link omap3evm_dai = {
  79         .name           = "TWL4030",
  80         .stream_name    = "TWL4030",
  81         .cpu_dai_name = "omap-mcbsp-dai.1",
  82         .codec_dai_name = "twl4030-hifi",
  83         .platform_name = "omap-pcm-audio",
  84         .codec_name = "twl4030-codec",
  85         .ops            = &omap3evm_ops,
  86 };
  87
  88 /* Audio machine driver */
  89 static struct snd_soc_card snd_soc_omap3evm = {
  90         .name = "omap3evm",
  91         .dai_link = &omap3evm_dai,
  92         .num_links = 1,
  93 };
  94
  95 static struct platform_device *omap3evm_snd_device;
  96
  97 static int __init omap3evm_soc_init(void)
  98 {
  99         int ret;
 100
 101         if (!machine_is_omap3evm())
 102                 return -ENODEV;
 103         pr_info("OMAP3 EVM SoC init\n");
 104
 105         omap3evm_snd_device = platform_device_alloc("soc-audio", -1);
 106         if (!omap3evm_snd_device) {
 107                 printk(KERN_ERR "Platform device allocation failed\n");
 108                 return -ENOMEM;
 109         }
 110
 111         platform_set_drvdata(omap3evm_snd_device, &snd_soc_omap3evm);
 112         ret = platform_device_add(omap3evm_snd_device);
 113         if (ret)
 114                 goto err1;
 115
 116         return 0;
 117
 118 err1:
 119         printk(KERN_ERR "Unable to add platform device\n");
 120         platform_device_put(omap3evm_snd_device);
 121
 122         return ret;
 123 }
 124
 125 static void __exit omap3evm_soc_exit(void)
 126 {
 127         platform_device_unregister(omap3evm_snd_device);
 128 }
 129
 130 module_init(omap3evm_soc_init);
 131 module_exit(omap3evm_soc_exit);
 132
 133 MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
 134 MODULE_DESCRIPTION("ALSA SoC OMAP3 EVM");
 135 MODULE_LICENSE("GPL v2");