root/sound/soc/pxa/imote2.c

DEFINITIONS

1. imote2_asoc_hw_params
2. imote2_probe

   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 SND_SOC_DAILINK_DEFS(wm8940,
  51         DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
  52         DAILINK_COMP_ARRAY(COMP_CODEC("wm8940-codec.0-0034",
  53                                       "wm8940-hifi")),
  54         DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
  55 
  56 static struct snd_soc_dai_link imote2_dai = {
  57         .name = "WM8940",
  58         .stream_name = "WM8940",
  59         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  60                    SND_SOC_DAIFMT_CBS_CFS,
  61         .ops = &imote2_asoc_ops,
  62         SND_SOC_DAILINK_REG(wm8940),
  63 };
  64 
  65 static struct snd_soc_card imote2 = {
  66         .name = "Imote2",
  67         .owner = THIS_MODULE,
  68         .dai_link = &imote2_dai,
  69         .num_links = 1,
  70 };
  71 
  72 static int imote2_probe(struct platform_device *pdev)
  73 {
  74         struct snd_soc_card *card = &imote2;
  75         int ret;
  76 
  77         card->dev = &pdev->dev;
  78 
  79         ret = devm_snd_soc_register_card(&pdev->dev, card);
  80         if (ret)
  81                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
  82                         ret);
  83         return ret;
  84 }
  85 
  86 static struct platform_driver imote2_driver = {
  87         .driver         = {
  88                 .name   = "imote2-audio",
  89                 .pm     = &snd_soc_pm_ops,
  90         },
  91         .probe          = imote2_probe,
  92 };
  93 
  94 module_platform_driver(imote2_driver);
  95 
  96 MODULE_AUTHOR("Jonathan Cameron");
  97 MODULE_DESCRIPTION("ALSA SoC Imote 2");
  98 MODULE_LICENSE("GPL");
  99 MODULE_ALIAS("platform:imote2-audio");