sound/soc/pxa/imote2.c

   1
   2 #include <linux/module.h>
   3 #include <sound/soc.h>
   4
   5 #include <asm/mach-types.h>
   6
   7 #include "../codecs/wm8940.h"
   8 #include "pxa2xx-i2s.h"
   9
  10 static int imote2_asoc_hw_params(struct snd_pcm_substream *substream,
  11                                  struct snd_pcm_hw_params *params)
  12 {
  13         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  14         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  15         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  16         unsigned int clk = 0;
  17         int ret;
  18
  19         switch (params_rate(params)) {
  20         case 8000:
  21         case 16000:
  22         case 48000:
  23         case 96000:
  24                 clk = 12288000;
  25                 break;
  26         case 11025:
  27         case 22050:
  28         case 44100:
  29                 clk = 11289600;
  30                 break;
  31         }
  32
  33         ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
  34                                      SND_SOC_CLOCK_IN);
  35         if (ret < 0)
  36                 return ret;
  37
  38         /* set the I2S system clock as input (unused) */
  39         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk,
  40                 SND_SOC_CLOCK_OUT);
  41
  42         return ret;
  43 }
  44
  45 static const struct snd_soc_ops imote2_asoc_ops = {
  46         .hw_params = imote2_asoc_hw_params,
  47 };
  48
  49 SND_SOC_DAILINK_DEFS(wm8940,
  50         DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
  51         DAILINK_COMP_ARRAY(COMP_CODEC("wm8940-codec.0-0034",
  52                                       "wm8940-hifi")),
  53         DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
  54
  55 static struct snd_soc_dai_link imote2_dai = {
  56         .name = "WM8940",
  57         .stream_name = "WM8940",
  58         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  59                    SND_SOC_DAIFMT_CBS_CFS,
  60         .ops = &imote2_asoc_ops,
  61         SND_SOC_DAILINK_REG(wm8940),
  62 };
  63
  64 static struct snd_soc_card imote2 = {
  65         .name = "Imote2",
  66         .owner = THIS_MODULE,
  67         .dai_link = &imote2_dai,
  68         .num_links = 1,
  69 };
  70
  71 static int imote2_probe(struct platform_device *pdev)
  72 {
  73         struct snd_soc_card *card = &imote2;
  74         int ret;
  75
  76         card->dev = &pdev->dev;
  77
  78         ret = devm_snd_soc_register_card(&pdev->dev, card);
  79         if (ret)
  80                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
  81                         ret);
  82         return ret;
  83 }
  84
  85 static struct platform_driver imote2_driver = {
  86         .driver         = {
  87                 .name   = "imote2-audio",
  88                 .pm     = &snd_soc_pm_ops,
  89         },
  90         .probe          = imote2_probe,
  91 };
  92
  93 module_platform_driver(imote2_driver);
  94
  95 MODULE_AUTHOR("Jonathan Cameron");
  96 MODULE_DESCRIPTION("ALSA SoC Imote 2");
  97 MODULE_LICENSE("GPL");
  98 MODULE_ALIAS("platform:imote2-audio");