sound/soc/pxa/imote2.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 #include <linux/module.h>
   4 #include <sound/soc.h>
   5
   6 #include <asm/mach-types.h>
   7
   8 #include "../codecs/wm8940.h"
   9 #include "pxa2xx-i2s.h"
  10
  11 static int imote2_asoc_hw_params(struct snd_pcm_substream *substream,
  12                                  struct snd_pcm_hw_params *params)
  13 {
  14         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  15         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  16         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  17         unsigned int clk = 0;
  18         int ret;
  19
  20         switch (params_rate(params)) {
  21         case 8000:
  22         case 16000:
  23         case 48000:
  24         case 96000:
  25                 clk = 12288000;
  26                 break;
  27         case 11025:
  28         case 22050:
  29         case 44100:
  30                 clk = 11289600;
  31                 break;
  32         }
  33
  34         ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
  35                                      SND_SOC_CLOCK_IN);
  36         if (ret < 0)
  37                 return ret;
  38
  39         /* set the I2S system clock as input (unused) */
  40         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk,
  41                 SND_SOC_CLOCK_OUT);
  42
  43         return ret;
  44 }
  45
  46 static const struct snd_soc_ops imote2_asoc_ops = {
  47         .hw_params = imote2_asoc_hw_params,
  48 };
  49
  50 static struct snd_soc_dai_link imote2_dai = {
  51         .name = "WM8940",
  52         .stream_name = "WM8940",
  53         .cpu_dai_name = "pxa2xx-i2s",
  54         .codec_dai_name = "wm8940-hifi",
  55         .platform_name = "pxa-pcm-audio",
  56         .codec_name = "wm8940-codec.0-0034",
  57         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  58                    SND_SOC_DAIFMT_CBS_CFS,
  59         .ops = &imote2_asoc_ops,
  60 };
  61
  62 static struct snd_soc_card imote2 = {
  63         .name = "Imote2",
  64         .owner = THIS_MODULE,
  65         .dai_link = &imote2_dai,
  66         .num_links = 1,
  67 };
  68
  69 static int imote2_probe(struct platform_device *pdev)
  70 {
  71         struct snd_soc_card *card = &imote2;
  72         int ret;
  73
  74         card->dev = &pdev->dev;
  75
  76         ret = devm_snd_soc_register_card(&pdev->dev, card);
  77         if (ret)
  78                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
  79                         ret);
  80         return ret;
  81 }
  82
  83 static struct platform_driver imote2_driver = {
  84         .driver         = {
  85                 .name   = "imote2-audio",
  86                 .pm     = &snd_soc_pm_ops,
  87         },
  88         .probe          = imote2_probe,
  89 };
  90
  91 module_platform_driver(imote2_driver);
  92
  93 MODULE_AUTHOR("Jonathan Cameron");
  94 MODULE_DESCRIPTION("ALSA SoC Imote 2");
  95 MODULE_LICENSE("GPL");
  96 MODULE_ALIAS("platform:imote2-audio");