LXR linux/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
  11static 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
  46static const struct snd_soc_ops imote2_asoc_ops = {
  47        .hw_params = imote2_asoc_hw_params,
  48};
  49
  50static 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
  62static struct snd_soc_card imote2 = {
  63        .name = "Imote2",
  64        .owner = THIS_MODULE,
  65        .dai_link = &imote2_dai,
  66        .num_links = 1,
  67};
  68
  69static 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
  83static struct platform_driver imote2_driver = {
  84        .driver         = {
  85                .name   = "imote2-audio",
  86                .pm     = &snd_soc_pm_ops,
  87        },
  88        .probe          = imote2_probe,
  89};
  90
  91module_platform_driver(imote2_driver);
  92
  93MODULE_AUTHOR("Jonathan Cameron");
  94MODULE_DESCRIPTION("ALSA SoC Imote 2");
  95MODULE_LICENSE("GPL");
  96MODULE_ALIAS("platform:imote2-audio");
  97