Quelle  tobermory.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0+
//
// Tobermory audio support
//
// Copyright 2011 Wolfson Microelectronics

#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/jack.h>
#include <linux/module.h>

#include "../codecs/wm8962.h"

static int sample_rate = 44100;

static int tobermory_set_bias_level(struct snd_soc_card *card,
       struct snd_soc_dapm_context *dapm,
       enum snd_soc_bias_level level)
{
 struct snd_soc_pcm_runtime *rtd;
 struct snd_soc_dai *codec_dai;
 int ret;

 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 codec_dai = snd_soc_rtd_to_codec(rtd, 0);

 if (dapm->dev != codec_dai->dev)
  return 0;

 switch (level) {
 case SND_SOC_BIAS_PREPARE:
  if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
   ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
        WM8962_FLL_MCLK, 32768,
        sample_rate * 512);
   if (ret < 0)
    pr_err("Failed to start FLL: %d\n", ret);

   ret = snd_soc_dai_set_sysclk(codec_dai,
           WM8962_SYSCLK_FLL,
           sample_rate * 512,
           SND_SOC_CLOCK_IN);
   if (ret < 0) {
    pr_err("Failed to set SYSCLK: %d\n", ret);
    snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
          0, 0, 0);
    return ret;
   }
  }
  break;

 default:
  break;
 }

 return 0;
}

static int tobermory_set_bias_level_post(struct snd_soc_card *card,
            struct snd_soc_dapm_context *dapm,
            enum snd_soc_bias_level level)
{
 struct snd_soc_pcm_runtime *rtd;
 struct snd_soc_dai *codec_dai;
 int ret;

 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 codec_dai = snd_soc_rtd_to_codec(rtd, 0);

 if (dapm->dev != codec_dai->dev)
  return 0;

 switch (level) {
 case SND_SOC_BIAS_STANDBY:
  ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
          32768, SND_SOC_CLOCK_IN);
  if (ret < 0) {
   pr_err("Failed to switch away from FLL: %d\n", ret);
   return ret;
  }

  ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
       0, 0, 0);
  if (ret < 0) {
   pr_err("Failed to stop FLL: %d\n", ret);
   return ret;
  }
  break;

 default:
  break;
 }

 return 0;
}

static int tobermory_hw_params(struct snd_pcm_substream *substream,
         struct snd_pcm_hw_params *params)
{
 sample_rate = params_rate(params);

 return 0;
}

static const struct snd_soc_ops tobermory_ops = {
 .hw_params = tobermory_hw_params,
};

SND_SOC_DAILINK_DEFS(cpu,
 DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
 DAILINK_COMP_ARRAY(COMP_CODEC("wm8962.1-001a", "wm8962")),
 DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));

static struct snd_soc_dai_link tobermory_dai[] = {
 {
  .name = "CPU",
  .stream_name = "CPU",
  .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
    | SND_SOC_DAIFMT_CBP_CFP,
  .ops = &tobermory_ops,
  SND_SOC_DAILINK_REG(cpu),
 },
};

static const struct snd_kcontrol_new controls[] = {
 SOC_DAPM_PIN_SWITCH("Main Speaker"),
 SOC_DAPM_PIN_SWITCH("DMIC"),
};

static const struct snd_soc_dapm_widget widgets[] = {
 SND_SOC_DAPM_HP("Headphone", NULL),
 SND_SOC_DAPM_MIC("Headset Mic", NULL),

 SND_SOC_DAPM_MIC("DMIC", NULL),
 SND_SOC_DAPM_MIC("AMIC", NULL),

 SND_SOC_DAPM_SPK("Main Speaker", NULL),
};

static const struct snd_soc_dapm_route audio_paths[] = {
 { "Headphone", NULL, "HPOUTL" },
 { "Headphone", NULL, "HPOUTR" },

 { "Main Speaker", NULL, "SPKOUTL" },
 { "Main Speaker", NULL, "SPKOUTR" },

 { "Headset Mic", NULL, "MICBIAS" },
 { "IN4L", NULL, "Headset Mic" },
 { "IN4R", NULL, "Headset Mic" },

 { "AMIC", NULL, "MICBIAS" },
 { "IN1L", NULL, "AMIC" },
 { "IN1R", NULL, "AMIC" },

 { "DMIC", NULL, "MICBIAS" },
 { "DMICDAT", NULL, "DMIC" },
};

static struct snd_soc_jack tobermory_headset;

/* Headset jack detection DAPM pins */
static struct snd_soc_jack_pin tobermory_headset_pins[] = {
 {
  .pin = "Headset Mic",
  .mask = SND_JACK_MICROPHONE,
 },
 {
  .pin = "Headphone",
  .mask = SND_JACK_MICROPHONE,
 },
};

static int tobermory_late_probe(struct snd_soc_card *card)
{
 struct snd_soc_pcm_runtime *rtd;
 struct snd_soc_component *component;
 struct snd_soc_dai *codec_dai;
 int ret;

 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 component = snd_soc_rtd_to_codec(rtd, 0)->component;
 codec_dai = snd_soc_rtd_to_codec(rtd, 0);

 ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
         32768, SND_SOC_CLOCK_IN);
 if (ret < 0)
  return ret;

 ret = snd_soc_card_jack_new_pins(card, "Headset", SND_JACK_HEADSET |
      SND_JACK_BTN_0, &tobermory_headset,
      tobermory_headset_pins,
      ARRAY_SIZE(tobermory_headset_pins));
 if (ret)
  return ret;

 wm8962_mic_detect(component, &tobermory_headset);

 return 0;
}

static struct snd_soc_card tobermory = {
 .name = "Tobermory",
 .owner = THIS_MODULE,
 .dai_link = tobermory_dai,
 .num_links = ARRAY_SIZE(tobermory_dai),

 .set_bias_level = tobermory_set_bias_level,
 .set_bias_level_post = tobermory_set_bias_level_post,

 .controls = controls,
 .num_controls = ARRAY_SIZE(controls),
 .dapm_widgets = widgets,
 .num_dapm_widgets = ARRAY_SIZE(widgets),
 .dapm_routes = audio_paths,
 .num_dapm_routes = ARRAY_SIZE(audio_paths),
 .fully_routed = true,

 .late_probe = tobermory_late_probe,
};

static int tobermory_probe(struct platform_device *pdev)
{
 struct snd_soc_card *card = &tobermory;
 int ret;

 card->dev = &pdev->dev;

 ret = devm_snd_soc_register_card(&pdev->dev, card);
 if (ret)
  dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");

 return ret;
}

static struct platform_driver tobermory_driver = {
 .driver = {
  .name = "tobermory",
  .pm = &snd_soc_pm_ops,
 },
 .probe = tobermory_probe,
};

module_platform_driver(tobermory_driver);

MODULE_DESCRIPTION("Tobermory audio support");
MODULE_AUTHOR("Mark Brown ");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:tobermory");