Quelle  mt8365-mt6357.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/*
 * MediaTek MT8365 Sound Card driver
 *
 * Copyright (c) 2024 MediaTek Inc.
 * Authors: Nicolas Belin <nbelin@baylibre.com>
 */

#include <linux/array_size.h>
#include <linux/dev_printk.h>
#include <linux/err.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/types.h>

#include <sound/soc.h>
#include <sound/pcm_params.h>

#include "mt8365-afe-common.h"
#include "../common/mtk-soc-card.h"
#include "../common/mtk-soundcard-driver.h"

enum pinctrl_pin_state {
 PIN_STATE_DEFAULT,
 PIN_STATE_DMIC,
 PIN_STATE_MISO_OFF,
 PIN_STATE_MISO_ON,
 PIN_STATE_MOSI_OFF,
 PIN_STATE_MOSI_ON,
 PIN_STATE_MAX
};

static const char * const mt8365_mt6357_pin_str[PIN_STATE_MAX] = {
 "default",
 "dmic",
 "miso_off",
 "miso_on",
 "mosi_off",
 "mosi_on",
};

struct mt8365_mt6357_priv {
 struct pinctrl *pinctrl;
 struct pinctrl_state *pin_states[PIN_STATE_MAX];
};

enum {
 /* FE */
 DAI_LINK_DL1_PLAYBACK = 0,
 DAI_LINK_DL2_PLAYBACK,
 DAI_LINK_AWB_CAPTURE,
 DAI_LINK_VUL_CAPTURE,
 /* BE */
 DAI_LINK_2ND_I2S_INTF,
 DAI_LINK_DMIC,
 DAI_LINK_INT_ADDA,
 DAI_LINK_NUM
};

static const struct snd_soc_dapm_widget mt8365_mt6357_widgets[] = {
 SND_SOC_DAPM_OUTPUT("HDMI Out"),
};

static const struct snd_soc_dapm_route mt8365_mt6357_routes[] = {
 {"HDMI Out", NULL, "2ND I2S Playback"},
 {"DMIC In", NULL, "MICBIAS0"},
};

static int mt8365_mt6357_int_adda_startup(struct snd_pcm_substream *substream)
{
 struct snd_soc_pcm_runtime *rtd = substream->private_data;
 struct mt8365_mt6357_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 int ret = 0;

 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
  if (IS_ERR(priv->pin_states[PIN_STATE_MOSI_ON]))
   return ret;

  ret = pinctrl_select_state(priv->pinctrl,
        priv->pin_states[PIN_STATE_MOSI_ON]);
  if (ret)
   dev_err(rtd->card->dev, "%s failed to select state %d\n",
    __func__, ret);
 }

 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
  if (IS_ERR(priv->pin_states[PIN_STATE_MISO_ON]))
   return ret;

  ret = pinctrl_select_state(priv->pinctrl,
        priv->pin_states[PIN_STATE_MISO_ON]);
  if (ret)
   dev_err(rtd->card->dev, "%s failed to select state %d\n",
    __func__, ret);
 }

 return 0;
}

static void mt8365_mt6357_int_adda_shutdown(struct snd_pcm_substream *substream)
{
 struct snd_soc_pcm_runtime *rtd = substream->private_data;
 struct mt8365_mt6357_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 int ret = 0;

 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
  if (IS_ERR(priv->pin_states[PIN_STATE_MOSI_OFF]))
   return;

  ret = pinctrl_select_state(priv->pinctrl,
        priv->pin_states[PIN_STATE_MOSI_OFF]);
  if (ret)
   dev_err(rtd->card->dev, "%s failed to select state %d\n",
    __func__, ret);
 }

 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
  if (IS_ERR(priv->pin_states[PIN_STATE_MISO_OFF]))
   return;

  ret = pinctrl_select_state(priv->pinctrl,
        priv->pin_states[PIN_STATE_MISO_OFF]);
  if (ret)
   dev_err(rtd->card->dev, "%s failed to select state %d\n",
    __func__, ret);
 }
}

static const struct snd_soc_ops mt8365_mt6357_int_adda_ops = {
 .startup = mt8365_mt6357_int_adda_startup,
 .shutdown = mt8365_mt6357_int_adda_shutdown,
};

SND_SOC_DAILINK_DEFS(playback1,
       DAILINK_COMP_ARRAY(COMP_CPU("DL1")),
       DAILINK_COMP_ARRAY(COMP_DUMMY()),
       DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(playback2,
       DAILINK_COMP_ARRAY(COMP_CPU("DL2")),
       DAILINK_COMP_ARRAY(COMP_DUMMY()),
       DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(awb_capture,
       DAILINK_COMP_ARRAY(COMP_CPU("AWB")),
       DAILINK_COMP_ARRAY(COMP_DUMMY()),
       DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(vul,
       DAILINK_COMP_ARRAY(COMP_CPU("VUL")),
       DAILINK_COMP_ARRAY(COMP_DUMMY()),
       DAILINK_COMP_ARRAY(COMP_EMPTY()));

SND_SOC_DAILINK_DEFS(i2s3,
       DAILINK_COMP_ARRAY(COMP_CPU("2ND I2S")),
       DAILINK_COMP_ARRAY(COMP_DUMMY()),
       DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(dmic,
       DAILINK_COMP_ARRAY(COMP_CPU("DMIC")),
       DAILINK_COMP_ARRAY(COMP_DUMMY()),
       DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(primary_codec,
       DAILINK_COMP_ARRAY(COMP_CPU("INT ADDA")),
       DAILINK_COMP_ARRAY(COMP_CODEC("mt6357-sound", "mt6357-snd-codec-aif1")),
       DAILINK_COMP_ARRAY(COMP_EMPTY()));

/* Digital audio interface glue - connects codec <---> CPU */
static struct snd_soc_dai_link mt8365_mt6357_dais[] = {
 /* Front End DAI links */
 [DAI_LINK_DL1_PLAYBACK] = {
  .name = "DL1_FE",
  .stream_name = "MultiMedia1_PLayback",
  .id = DAI_LINK_DL1_PLAYBACK,
  .trigger = {
   SND_SOC_DPCM_TRIGGER_POST,
   SND_SOC_DPCM_TRIGGER_POST
  },
  .dynamic = 1,
  .playback_only = 1,
  .dpcm_merged_rate = 1,
  SND_SOC_DAILINK_REG(playback1),
 },
 [DAI_LINK_DL2_PLAYBACK] = {
  .name = "DL2_FE",
  .stream_name = "MultiMedia2_PLayback",
  .id = DAI_LINK_DL2_PLAYBACK,
  .trigger = {
   SND_SOC_DPCM_TRIGGER_POST,
   SND_SOC_DPCM_TRIGGER_POST
  },
  .dynamic = 1,
  .playback_only = 1,
  .dpcm_merged_rate = 1,
  SND_SOC_DAILINK_REG(playback2),
 },
 [DAI_LINK_AWB_CAPTURE] = {
  .name = "AWB_FE",
  .stream_name = "DL1_AWB_Record",
  .id = DAI_LINK_AWB_CAPTURE,
  .trigger = {
   SND_SOC_DPCM_TRIGGER_POST,
   SND_SOC_DPCM_TRIGGER_POST
  },
  .dynamic = 1,
  .capture_only = 1,
  .dpcm_merged_rate = 1,
  SND_SOC_DAILINK_REG(awb_capture),
 },
 [DAI_LINK_VUL_CAPTURE] = {
  .name = "VUL_FE",
  .stream_name = "MultiMedia1_Capture",
  .id = DAI_LINK_VUL_CAPTURE,
  .trigger = {
   SND_SOC_DPCM_TRIGGER_POST,
   SND_SOC_DPCM_TRIGGER_POST
  },
  .dynamic = 1,
  .capture_only = 1,
  .dpcm_merged_rate = 1,
  SND_SOC_DAILINK_REG(vul),
 },
 /* Back End DAI links */
 [DAI_LINK_2ND_I2S_INTF] = {
  .name = "I2S_OUT_BE",
  .no_pcm = 1,
  .id = DAI_LINK_2ND_I2S_INTF,
  .dai_fmt = SND_SOC_DAIFMT_I2S |
    SND_SOC_DAIFMT_NB_NF |
    SND_SOC_DAIFMT_CBC_CFC,
  SND_SOC_DAILINK_REG(i2s3),
 },
 [DAI_LINK_DMIC] = {
  .name = "DMIC_BE",
  .no_pcm = 1,
  .id = DAI_LINK_DMIC,
  .capture_only = 1,
  SND_SOC_DAILINK_REG(dmic),
 },
 [DAI_LINK_INT_ADDA] = {
  .name = "MTK_Codec",
  .no_pcm = 1,
  .id = DAI_LINK_INT_ADDA,
  .ops = &mt8365_mt6357_int_adda_ops,
  SND_SOC_DAILINK_REG(primary_codec),
 },
};

static int mt8365_mt6357_gpio_probe(struct snd_soc_card *card)
{
 struct mt8365_mt6357_priv *priv = snd_soc_card_get_drvdata(card);
 int ret, i;

 priv->pinctrl = devm_pinctrl_get(card->dev);
 if (IS_ERR(priv->pinctrl)) {
  ret = PTR_ERR(priv->pinctrl);
  return dev_err_probe(card->dev, ret,
         "Failed to get pinctrl\n");
 }

 for (i = PIN_STATE_DEFAULT ; i < PIN_STATE_MAX ; i++) {
  priv->pin_states[i] = pinctrl_lookup_state(priv->pinctrl,
          mt8365_mt6357_pin_str[i]);
  if (IS_ERR(priv->pin_states[i])) {
   dev_info(card->dev, "No pin state for %s\n",
     mt8365_mt6357_pin_str[i]);
  } else {
   ret = pinctrl_select_state(priv->pinctrl,
         priv->pin_states[i]);
   if (ret) {
    dev_err_probe(card->dev, ret,
           "Failed to select pin state %s\n",
           mt8365_mt6357_pin_str[i]);
    return ret;
   }
  }
 }
 return 0;
}

static struct snd_soc_card mt8365_mt6357_soc_card = {
 .name = "mt8365-evk",
 .owner = THIS_MODULE,
 .dai_link = mt8365_mt6357_dais,
 .num_links = ARRAY_SIZE(mt8365_mt6357_dais),
 .dapm_widgets = mt8365_mt6357_widgets,
 .num_dapm_widgets = ARRAY_SIZE(mt8365_mt6357_widgets),
 .dapm_routes = mt8365_mt6357_routes,
 .num_dapm_routes = ARRAY_SIZE(mt8365_mt6357_routes),
};

static int mt8365_mt6357_dev_probe(struct mtk_soc_card_data *soc_card_data, bool legacy)
{
 struct mtk_platform_card_data *card_data = soc_card_data->card_data;
 struct snd_soc_card *card = card_data->card;
 struct device *dev = card->dev;
 struct mt8365_mt6357_priv *mach_priv;
 int ret;

 card->dev = dev;
 ret = parse_dai_link_info(card);
 if (ret)
  goto err;

 mach_priv = devm_kzalloc(dev, sizeof(*mach_priv),
     GFP_KERNEL);
 if (!mach_priv)
  return -ENOMEM;
 soc_card_data->mach_priv = mach_priv;
 snd_soc_card_set_drvdata(card, soc_card_data);
 mt8365_mt6357_gpio_probe(card);
 return 0;

err:
 clean_card_reference(card);
 return ret;
}

static const struct mtk_soundcard_pdata mt8365_mt6357_card = {
 .card_name = "mt8365-mt6357",
 .card_data = &(struct mtk_platform_card_data) {
  .card = &mt8365_mt6357_soc_card,
 },
 .soc_probe = mt8365_mt6357_dev_probe
};

static const struct of_device_id mt8365_mt6357_dt_match[] = {
 { .compatible = "mediatek,mt8365-mt6357", .data = &mt8365_mt6357_card },
 { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mt8365_mt6357_dt_match);

static struct platform_driver mt8365_mt6357_driver = {
 .driver = {
     .name = "mt8365_mt6357",
     .of_match_table = mt8365_mt6357_dt_match,
     .pm = &snd_soc_pm_ops,
 },
 .probe = mtk_soundcard_common_probe,
};

module_platform_driver(mt8365_mt6357_driver);

/* Module information */
MODULE_DESCRIPTION("MT8365 EVK SoC machine driver");
MODULE_AUTHOR("Nicolas Belin ");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform: mt8365_mt6357");