LXR linux/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 <linux/module.h>
  23#include <sound/core.h>
  24#include <sound/pcm.h>
  25#include <sound/soc.h>
  26
  27#include <asm/mach-types.h>
  28#include <mach/hardware.h>
  29#include <mach/gpio.h>
  30#include <plat/mcbsp.h>
  31
  32#include "omap-mcbsp.h"
  33#include "omap-pcm.h"
  34
  35static int omap3evm_hw_params(struct snd_pcm_substream *substream,
  36        struct snd_pcm_hw_params *params)
  37{
  38        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  39        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  40        int ret;
  41
  42        /* Set the codec system clock for DAC and ADC */
  43        ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  44                                     SND_SOC_CLOCK_IN);
  45        if (ret < 0) {
  46                printk(KERN_ERR "Can't set codec system clock\n");
  47                return ret;
  48        }
  49
  50        return 0;
  51}
  52
  53static struct snd_soc_ops omap3evm_ops = {
  54        .hw_params = omap3evm_hw_params,
  55};
  56
  57/* Digital audio interface glue - connects codec <--> CPU */
  58static struct snd_soc_dai_link omap3evm_dai = {
  59        .name           = "TWL4030",
  60        .stream_name    = "TWL4030",
  61        .cpu_dai_name = "omap-mcbsp.2",
  62        .codec_dai_name = "twl4030-hifi",
  63        .platform_name = "omap-pcm-audio",
  64        .codec_name = "twl4030-codec",
  65        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  66                   SND_SOC_DAIFMT_CBM_CFM,
  67        .ops            = &omap3evm_ops,
  68};
  69
  70/* Audio machine driver */
  71static struct snd_soc_card snd_soc_omap3evm = {
  72        .name = "omap3evm",
  73        .owner = THIS_MODULE,
  74        .dai_link = &omap3evm_dai,
  75        .num_links = 1,
  76};
  77
  78static struct platform_device *omap3evm_snd_device;
  79
  80static int __init omap3evm_soc_init(void)
  81{
  82        int ret;
  83
  84        if (!machine_is_omap3evm())
  85                return -ENODEV;
  86        pr_info("OMAP3 EVM SoC init\n");
  87
  88        omap3evm_snd_device = platform_device_alloc("soc-audio", -1);
  89        if (!omap3evm_snd_device) {
  90                printk(KERN_ERR "Platform device allocation failed\n");
  91                return -ENOMEM;
  92        }
  93
  94        platform_set_drvdata(omap3evm_snd_device, &snd_soc_omap3evm);
  95        ret = platform_device_add(omap3evm_snd_device);
  96        if (ret)
  97                goto err1;
  98
  99        return 0;
 100
 101err1:
 102        printk(KERN_ERR "Unable to add platform device\n");
 103        platform_device_put(omap3evm_snd_device);
 104
 105        return ret;
 106}
 107
 108static void __exit omap3evm_soc_exit(void)
 109{
 110        platform_device_unregister(omap3evm_snd_device);
 111}
 112
 113module_init(omap3evm_soc_init);
 114module_exit(omap3evm_soc_exit);
 115
 116MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
 117MODULE_DESCRIPTION("ALSA SoC OMAP3 EVM");
 118MODULE_LICENSE("GPL v2");
 119