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         int ret;
  40
  41         /* Set the codec system clock for DAC and ADC */
  42         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  43                                      SND_SOC_CLOCK_IN);
  44         if (ret < 0) {
  45                 printk(KERN_ERR "Can't set codec system clock\n");
  46                 return ret;
  47         }
  48
  49         return 0;
  50 }
  51
  52 static struct snd_soc_ops omap3evm_ops = {
  53         .hw_params = omap3evm_hw_params,
  54 };
  55
  56 /* Digital audio interface glue - connects codec <--> CPU */
  57 static struct snd_soc_dai_link omap3evm_dai = {
  58         .name           = "TWL4030",
  59         .stream_name    = "TWL4030",
  60         .cpu_dai_name = "omap-mcbsp-dai.1",
  61         .codec_dai_name = "twl4030-hifi",
  62         .platform_name = "omap-pcm-audio",
  63         .codec_name = "twl4030-codec",
  64         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  65                    SND_SOC_DAIFMT_CBM_CFM,
  66         .ops            = &omap3evm_ops,
  67 };
  68
  69 /* Audio machine driver */
  70 static struct snd_soc_card snd_soc_omap3evm = {
  71         .name = "omap3evm",
  72         .dai_link = &omap3evm_dai,
  73         .num_links = 1,
  74 };
  75
  76 static struct platform_device *omap3evm_snd_device;
  77
  78 static int __init omap3evm_soc_init(void)
  79 {
  80         int ret;
  81
  82         if (!machine_is_omap3evm())
  83                 return -ENODEV;
  84         pr_info("OMAP3 EVM SoC init\n");
  85
  86         omap3evm_snd_device = platform_device_alloc("soc-audio", -1);
  87         if (!omap3evm_snd_device) {
  88                 printk(KERN_ERR "Platform device allocation failed\n");
  89                 return -ENOMEM;
  90         }
  91
  92         platform_set_drvdata(omap3evm_snd_device, &snd_soc_omap3evm);
  93         ret = platform_device_add(omap3evm_snd_device);
  94         if (ret)
  95                 goto err1;
  96
  97         return 0;
  98
  99 err1:
 100         printk(KERN_ERR "Unable to add platform device\n");
 101         platform_device_put(omap3evm_snd_device);
 102
 103         return ret;
 104 }
 105
 106 static void __exit omap3evm_soc_exit(void)
 107 {
 108         platform_device_unregister(omap3evm_snd_device);
 109 }
 110
 111 module_init(omap3evm_soc_init);
 112 module_exit(omap3evm_soc_exit);
 113
 114 MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
 115 MODULE_DESCRIPTION("ALSA SoC OMAP3 EVM");
 116 MODULE_LICENSE("GPL v2");