sound/soc/ep93xx/snappercl15.c

   1 /*
   2  * snappercl15.c -- SoC audio for Bluewater Systems Snapper CL15 module
   3  *
   4  * Copyright (C) 2008 Bluewater Systems Ltd
   5  * Author: Ryan Mallon
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/platform_device.h>
  15 #include <linux/module.h>
  16 #include <sound/core.h>
  17 #include <sound/pcm.h>
  18 #include <sound/soc.h>
  19
  20 #include <asm/mach-types.h>
  21 #include <mach/hardware.h>
  22
  23 #include "../codecs/tlv320aic23.h"
  24 #include "ep93xx-pcm.h"
  25
  26 #define CODEC_CLOCK 5644800
  27
  28 static int snappercl15_hw_params(struct snd_pcm_substream *substream,
  29                                  struct snd_pcm_hw_params *params)
  30 {
  31         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  32         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  33         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  34         int err;
  35
  36         err = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK,
  37                                      SND_SOC_CLOCK_IN);
  38         if (err)
  39                 return err;
  40
  41         err = snd_soc_dai_set_sysclk(cpu_dai, 0, CODEC_CLOCK,
  42                                      SND_SOC_CLOCK_OUT);
  43         if (err)
  44                 return err;
  45
  46         return 0;
  47 }
  48
  49 static struct snd_soc_ops snappercl15_ops = {
  50         .hw_params      = snappercl15_hw_params,
  51 };
  52
  53 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  54         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  55         SND_SOC_DAPM_LINE("Line In", NULL),
  56         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  57 };
  58
  59 static const struct snd_soc_dapm_route audio_map[] = {
  60         {"Headphone Jack", NULL, "LHPOUT"},
  61         {"Headphone Jack", NULL, "RHPOUT"},
  62
  63         {"LLINEIN", NULL, "Line In"},
  64         {"RLINEIN", NULL, "Line In"},
  65
  66         {"MICIN", NULL, "Mic Jack"},
  67 };
  68
  69 static int snappercl15_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
  70 {
  71         struct snd_soc_codec *codec = rtd->codec;
  72         struct snd_soc_dapm_context *dapm = &codec->dapm;
  73
  74         snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
  75                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
  76
  77         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
  78         return 0;
  79 }
  80
  81 static struct snd_soc_dai_link snappercl15_dai = {
  82         .name           = "tlv320aic23",
  83         .stream_name    = "AIC23",
  84         .cpu_dai_name   = "ep93xx-i2s",
  85         .codec_dai_name = "tlv320aic23-hifi",
  86         .codec_name     = "tlv320aic23-codec.0-001a",
  87         .platform_name  =  "ep93xx-pcm-audio",
  88         .init           = snappercl15_tlv320aic23_init,
  89         .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
  90                           SND_SOC_DAIFMT_CBS_CFS,
  91         .ops            = &snappercl15_ops,
  92 };
  93
  94 static struct snd_soc_card snd_soc_snappercl15 = {
  95         .name           = "Snapper CL15",
  96         .owner          = THIS_MODULE,
  97         .dai_link       = &snappercl15_dai,
  98         .num_links      = 1,
  99 };
 100
 101 static int __devinit snappercl15_probe(struct platform_device *pdev)
 102 {
 103         struct snd_soc_card *card = &snd_soc_snappercl15;
 104         int ret;
 105
 106         ret = ep93xx_i2s_acquire();
 107         if (ret)
 108                 return ret;
 109
 110         card->dev = &pdev->dev;
 111
 112         ret = snd_soc_register_card(card);
 113         if (ret) {
 114                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 115                         ret);
 116                 ep93xx_i2s_release();
 117         }
 118
 119         return ret;
 120 }
 121
 122 static int __devexit snappercl15_remove(struct platform_device *pdev)
 123 {
 124         struct snd_soc_card *card = platform_get_drvdata(pdev);
 125
 126         snd_soc_unregister_card(card);
 127         ep93xx_i2s_release();
 128
 129         return 0;
 130 }
 131
 132 static struct platform_driver snappercl15_driver = {
 133         .driver         = {
 134                 .name   = "snappercl15-audio",
 135                 .owner  = THIS_MODULE,
 136         },
 137         .probe          = snappercl15_probe,
 138         .remove         = __devexit_p(snappercl15_remove),
 139 };
 140
 141 module_platform_driver(snappercl15_driver);
 142
 143 MODULE_AUTHOR("Ryan Mallon");
 144 MODULE_DESCRIPTION("ALSA SoC Snapper CL15");
 145 MODULE_LICENSE("GPL");
 146 MODULE_ALIAS("platform:snappercl15-audio");