Quelle  mt8186-dai-hw-gain.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
//
// MediaTek ALSA SoC Audio DAI HW Gain Control
//
// Copyright (c) 2022 MediaTek Inc.
// Author: Jiaxin Yu <jiaxin.yu@mediatek.com>

#include <linux/regmap.h>
#include "mt8186-afe-common.h"
#include "mt8186-interconnection.h"

#define HW_GAIN_1_EN_W_NAME "HW GAIN 1 Enable"
#define HW_GAIN_2_EN_W_NAME "HW GAIN 2 Enable"

/* dai component */
static const struct snd_kcontrol_new mtk_hw_gain1_in_ch1_mix[] = {
 SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH1 Switch", AFE_CONN13_1,
        I_CONNSYS_I2S_CH1, 1, 0),
};

static const struct snd_kcontrol_new mtk_hw_gain1_in_ch2_mix[] = {
 SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH2 Switch", AFE_CONN14_1,
        I_CONNSYS_I2S_CH2, 1, 0),
};

static const struct snd_kcontrol_new mtk_hw_gain2_in_ch1_mix[] = {
 SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH1 Switch", AFE_CONN15,
        I_ADDA_UL_CH1, 1, 0),
};

static const struct snd_kcontrol_new mtk_hw_gain2_in_ch2_mix[] = {
 SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH2 Switch", AFE_CONN16,
        I_ADDA_UL_CH2, 1, 0),
};

static int mtk_hw_gain_event(struct snd_soc_dapm_widget *w,
        struct snd_kcontrol *kcontrol,
        int event)
{
 struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
 struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
 unsigned int gain_cur;
 unsigned int gain_con1;

 dev_dbg(cmpnt->dev, "%s(), name %s, event 0x%x\n",
  __func__, w->name, event);

 switch (event) {
 case SND_SOC_DAPM_PRE_PMU:
  if (snd_soc_dapm_widget_name_cmp(w, HW_GAIN_1_EN_W_NAME) == 0) {
   gain_cur = AFE_GAIN1_CUR;
   gain_con1 = AFE_GAIN1_CON1;
  } else {
   gain_cur = AFE_GAIN2_CUR;
   gain_con1 = AFE_GAIN2_CON1;
  }

  /* let hw gain ramp up, set cur gain to 0 */
  regmap_update_bits(afe->regmap, gain_cur, AFE_GAIN1_CUR_MASK_SFT, 0);

  /* set target gain to 0 */
  regmap_update_bits(afe->regmap, gain_con1, GAIN1_TARGET_MASK_SFT, 0);
  break;
 default:
  break;
 }

 return 0;
}

static const struct snd_soc_dapm_widget mtk_dai_hw_gain_widgets[] = {
 /* inter-connections */
 SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH1", SND_SOC_NOPM, 0, 0,
      mtk_hw_gain1_in_ch1_mix,
      ARRAY_SIZE(mtk_hw_gain1_in_ch1_mix)),
 SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH2", SND_SOC_NOPM, 0, 0,
      mtk_hw_gain1_in_ch2_mix,
      ARRAY_SIZE(mtk_hw_gain1_in_ch2_mix)),
 SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH1", SND_SOC_NOPM, 0, 0,
      mtk_hw_gain2_in_ch1_mix,
      ARRAY_SIZE(mtk_hw_gain2_in_ch1_mix)),
 SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH2", SND_SOC_NOPM, 0, 0,
      mtk_hw_gain2_in_ch2_mix,
      ARRAY_SIZE(mtk_hw_gain2_in_ch2_mix)),

 SND_SOC_DAPM_SUPPLY(HW_GAIN_1_EN_W_NAME,
       AFE_GAIN1_CON0, GAIN1_ON_SFT, 0,
       mtk_hw_gain_event,
       SND_SOC_DAPM_PRE_PMU),

 SND_SOC_DAPM_SUPPLY(HW_GAIN_2_EN_W_NAME,
       AFE_GAIN2_CON0, GAIN2_ON_SFT, 0,
       mtk_hw_gain_event,
       SND_SOC_DAPM_PRE_PMU),

 SND_SOC_DAPM_INPUT("HW Gain 1 Out Endpoint"),
 SND_SOC_DAPM_INPUT("HW Gain 2 Out Endpoint"),
 SND_SOC_DAPM_OUTPUT("HW Gain 1 In Endpoint"),
};

static const struct snd_soc_dapm_route mtk_dai_hw_gain_routes[] = {
 {"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH1"},
 {"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH2"},
 {"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH1"},
 {"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH2"},

 {"HW Gain 1 In", NULL, HW_GAIN_1_EN_W_NAME},
 {"HW Gain 1 Out", NULL, HW_GAIN_1_EN_W_NAME},
 {"HW Gain 2 In", NULL, HW_GAIN_2_EN_W_NAME},
 {"HW Gain 2 Out", NULL, HW_GAIN_2_EN_W_NAME},

 {"HW Gain 1 In Endpoint", NULL, "HW Gain 1 In"},
 {"HW Gain 1 Out", NULL, "HW Gain 1 Out Endpoint"},
 {"HW Gain 2 Out", NULL, "HW Gain 2 Out Endpoint"},
};

static const struct snd_kcontrol_new mtk_hw_gain_controls[] = {
 SOC_SINGLE("HW Gain 1 Volume", AFE_GAIN1_CON1,
     GAIN1_TARGET_SFT, GAIN1_TARGET_MASK, 0),
 SOC_SINGLE("HW Gain 2 Volume", AFE_GAIN2_CON1,
     GAIN2_TARGET_SFT, GAIN2_TARGET_MASK, 0),
};

/* dai ops */
static int mtk_dai_gain_hw_params(struct snd_pcm_substream *substream,
      struct snd_pcm_hw_params *params,
      struct snd_soc_dai *dai)
{
 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
 unsigned int rate = params_rate(params);
 unsigned int rate_reg = mt8186_rate_transform(afe->dev, rate, dai->id);

 dev_dbg(afe->dev, "%s(), id %d, stream %d, rate %d\n",
  __func__, dai->id, substream->stream, rate);

 /* rate */
 regmap_update_bits(afe->regmap,
      dai->id == MT8186_DAI_HW_GAIN_1 ?
      AFE_GAIN1_CON0 : AFE_GAIN2_CON0,
      GAIN1_MODE_MASK_SFT,
      rate_reg << GAIN1_MODE_SFT);

 /* sample per step */
 regmap_update_bits(afe->regmap,
      dai->id == MT8186_DAI_HW_GAIN_1 ?
      AFE_GAIN1_CON0 : AFE_GAIN2_CON0,
      GAIN1_SAMPLE_PER_STEP_MASK_SFT,
      (dai->id == MT8186_DAI_HW_GAIN_1 ? 0x40 : 0x0) <<
      GAIN1_SAMPLE_PER_STEP_SFT);

 return 0;
}

static const struct snd_soc_dai_ops mtk_dai_gain_ops = {
 .hw_params = mtk_dai_gain_hw_params,
};

/* dai driver */
#define MTK_HW_GAIN_RATES (SNDRV_PCM_RATE_8000_48000 |\
      SNDRV_PCM_RATE_88200 |\
      SNDRV_PCM_RATE_96000 |\
      SNDRV_PCM_RATE_176400 |\
      SNDRV_PCM_RATE_192000)

#define MTK_HW_GAIN_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
        SNDRV_PCM_FMTBIT_S24_LE |\
        SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_driver mtk_dai_gain_driver[] = {
 {
  .name = "HW Gain 1",
  .id = MT8186_DAI_HW_GAIN_1,
  .playback = {
   .stream_name = "HW Gain 1 In",
   .channels_min = 1,
   .channels_max = 2,
   .rates = MTK_HW_GAIN_RATES,
   .formats = MTK_HW_GAIN_FORMATS,
  },
  .capture = {
   .stream_name = "HW Gain 1 Out",
   .channels_min = 1,
   .channels_max = 2,
   .rates = MTK_HW_GAIN_RATES,
   .formats = MTK_HW_GAIN_FORMATS,
  },
  .ops = &mtk_dai_gain_ops,
  .symmetric_rate = 1,
  .symmetric_channels = 1,
  .symmetric_sample_bits = 1,
 },
 {
  .name = "HW Gain 2",
  .id = MT8186_DAI_HW_GAIN_2,
  .playback = {
   .stream_name = "HW Gain 2 In",
   .channels_min = 1,
   .channels_max = 2,
   .rates = MTK_HW_GAIN_RATES,
   .formats = MTK_HW_GAIN_FORMATS,
  },
  .capture = {
   .stream_name = "HW Gain 2 Out",
   .channels_min = 1,
   .channels_max = 2,
   .rates = MTK_HW_GAIN_RATES,
   .formats = MTK_HW_GAIN_FORMATS,
  },
  .ops = &mtk_dai_gain_ops,
  .symmetric_rate = 1,
  .symmetric_channels = 1,
  .symmetric_sample_bits = 1,
 },
};

int mt8186_dai_hw_gain_register(struct mtk_base_afe *afe)
{
 struct mtk_base_afe_dai *dai;

 dai = devm_kzalloc(afe->dev, sizeof(*dai), GFP_KERNEL);
 if (!dai)
  return -ENOMEM;

 list_add(&dai->list, &afe->sub_dais);

 dai->dai_drivers = mtk_dai_gain_driver;
 dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_gain_driver);

 dai->controls = mtk_hw_gain_controls;
 dai->num_controls = ARRAY_SIZE(mtk_hw_gain_controls);
 dai->dapm_widgets = mtk_dai_hw_gain_widgets;
 dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_hw_gain_widgets);
 dai->dapm_routes = mtk_dai_hw_gain_routes;
 dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_hw_gain_routes);
 return 0;
}