kernel/sound/soc/blackfin/bfin-eval-adau1x81.c

   1 /*
   2  * Machine driver for EVAL-ADAU1x81 on Analog Devices bfin
   3  * evaluation boards.
   4  *
   5  * Copyright 2011-2014 Analog Devices Inc.
   6  * Author: Lars-Peter Clausen <lars@metafoo.de>
   7  *
   8  * Licensed under the GPL-2 or later.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/device.h>
  13 #include <linux/slab.h>
  14 #include <sound/core.h>
  15 #include <sound/pcm.h>
  16 #include <sound/soc.h>
  17 #include <sound/pcm_params.h>
  18
  19 #include "../codecs/adau17x1.h"
  20
  21 static const struct snd_soc_dapm_widget bfin_eval_adau1x81_dapm_widgets[] = {
  22         SND_SOC_DAPM_LINE("Stereo In", NULL),
  23         SND_SOC_DAPM_LINE("Beep", NULL),
  24
  25         SND_SOC_DAPM_SPK("Speaker", NULL),
  26         SND_SOC_DAPM_HP("Headphone", NULL),
  27 };
  28
  29 static const struct snd_soc_dapm_route bfin_eval_adau1x81_dapm_routes[] = {
  30         { "BEEP", NULL, "Beep" },
  31         { "LMIC", NULL, "Stereo In" },
  32         { "LMIC", NULL, "Stereo In" },
  33
  34         { "Headphone", NULL, "AOUTL" },
  35         { "Headphone", NULL, "AOUTR" },
  36         { "Speaker", NULL, "SP" },
  37 };
  38
  39 static int bfin_eval_adau1x81_hw_params(struct snd_pcm_substream *substream,
  40         struct snd_pcm_hw_params *params)
  41 {
  42         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  43         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  44         int pll_rate;
  45         int ret;
  46
  47         switch (params_rate(params)) {
  48         case 48000:
  49         case 8000:
  50         case 12000:
  51         case 16000:
  52         case 24000:
  53         case 32000:
  54         case 96000:
  55                 pll_rate = 48000 * 1024;
  56                 break;
  57         case 44100:
  58         case 7350:
  59         case 11025:
  60         case 14700:
  61         case 22050:
  62         case 29400:
  63         case 88200:
  64                 pll_rate = 44100 * 1024;
  65                 break;
  66         default:
  67                 return -EINVAL;
  68         }
  69
  70         ret = snd_soc_dai_set_pll(codec_dai, ADAU17X1_PLL,
  71                         ADAU17X1_PLL_SRC_MCLK, 12288000, pll_rate);
  72         if (ret)
  73                 return ret;
  74
  75         ret = snd_soc_dai_set_sysclk(codec_dai, ADAU17X1_CLK_SRC_PLL, pll_rate,
  76                         SND_SOC_CLOCK_IN);
  77
  78         return ret;
  79 }
  80
  81 static const struct snd_soc_ops bfin_eval_adau1x81_ops = {
  82         .hw_params = bfin_eval_adau1x81_hw_params,
  83 };
  84
  85 static struct snd_soc_dai_link bfin_eval_adau1x81_dai = {
  86         .name = "adau1x81",
  87         .stream_name = "adau1x81",
  88         .cpu_dai_name = "bfin-i2s.0",
  89         .codec_dai_name = "adau-hifi",
  90         .platform_name = "bfin-i2s-pcm-audio",
  91         .codec_name = "adau1781.0-0038",
  92         .ops = &bfin_eval_adau1x81_ops,
  93         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  94                 SND_SOC_DAIFMT_CBM_CFM,
  95 };
  96
  97 static struct snd_soc_card bfin_eval_adau1x81 = {
  98         .name = "bfin-eval-adau1x81",
  99         .driver_name = "eval-adau1x81",
 100         .dai_link = &bfin_eval_adau1x81_dai,
 101         .num_links = 1,
 102
 103         .dapm_widgets = bfin_eval_adau1x81_dapm_widgets,
 104         .num_dapm_widgets = ARRAY_SIZE(bfin_eval_adau1x81_dapm_widgets),
 105         .dapm_routes = bfin_eval_adau1x81_dapm_routes,
 106         .num_dapm_routes = ARRAY_SIZE(bfin_eval_adau1x81_dapm_routes),
 107         .fully_routed = true,
 108 };
 109
 110 static int bfin_eval_adau1x81_probe(struct platform_device *pdev)
 111 {
 112         bfin_eval_adau1x81.dev = &pdev->dev;
 113
 114         return devm_snd_soc_register_card(&pdev->dev, &bfin_eval_adau1x81);
 115 }
 116
 117 static struct platform_driver bfin_eval_adau1x81_driver = {
 118         .driver = {
 119                 .name = "bfin-eval-adau1x81",
 120                 .pm = &snd_soc_pm_ops,
 121         },
 122         .probe = bfin_eval_adau1x81_probe,
 123 };
 124 module_platform_driver(bfin_eval_adau1x81_driver);
 125
 126 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 127 MODULE_DESCRIPTION("ALSA SoC bfin adau1x81 driver");
 128 MODULE_LICENSE("GPL");
 129 MODULE_ALIAS("platform:bfin-eval-adau1x81");