[alsa-devel] [PATCH 3/4] ASoC: mediatek: add BT implementation

[Garlic Tseng]

Add BT implementation for mt2701 platform driver.

Signed-off-by: Garlic Tseng <garlic.tseng at mediatek.com>
---
 sound/soc/mediatek/mt2701/mt2701-afe-pcm.c | 139 +++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)

diff --git a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
index c865ba1..6c14d68 100644
--- a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
+++ b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
@@ -333,6 +333,86 @@ static int mt2701_afe_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 	return 0;
 }
 
+static int mt2701_btmrg_startup(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mt2701_afe_private *afe_priv = afe->platform_priv;
+
+	regmap_update_bits(afe->regmap, AUDIO_TOP_CON4,
+			   AUDIO_TOP_CON4_PDN_MRGIF, 0);
+
+	afe_priv->mrg_enable[substream->stream] = 1;
+	return 0;
+}
+
+static int mt2701_btmrg_hw_params(struct snd_pcm_substream *substream,
+				  struct snd_pcm_hw_params *params,
+				  struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	int stream_fs;
+	u32 val, msk;
+
+	stream_fs = params_rate(params);
+
+	if ((stream_fs != 8000) && (stream_fs != 16000)) {
+		dev_err(afe->dev, "%s() btmgr not supprt this stream_fs %d\n",
+			__func__, stream_fs);
+		return -EINVAL;
+	}
+
+	regmap_update_bits(afe->regmap, AFE_MRGIF_CON,
+			   AFE_MRGIF_CON_I2S_MODE_MASK,
+			   AFE_MRGIF_CON_I2S_MODE_32K);
+
+	val = AFE_DAIBT_CON0_BT_FUNC_EN | AFE_DAIBT_CON0_BT_FUNC_RDY
+	      | AFE_DAIBT_CON0_MRG_USE;
+	msk = val;
+
+	if (stream_fs == 16000)
+		val |= AFE_DAIBT_CON0_BT_WIDE_MODE_EN;
+
+	msk |= AFE_DAIBT_CON0_BT_WIDE_MODE_EN;
+
+	regmap_update_bits(afe->regmap, AFE_DAIBT_CON0, msk, val);
+
+	regmap_update_bits(afe->regmap, AFE_DAIBT_CON0,
+			   AFE_DAIBT_CON0_DAIBT_EN,
+			   AFE_DAIBT_CON0_DAIBT_EN);
+	regmap_update_bits(afe->regmap, AFE_MRGIF_CON,
+			   AFE_MRGIF_CON_MRG_I2S_EN,
+			   AFE_MRGIF_CON_MRG_I2S_EN);
+	regmap_update_bits(afe->regmap, AFE_MRGIF_CON,
+			   AFE_MRGIF_CON_MRG_EN,
+			   AFE_MRGIF_CON_MRG_EN);
+	return 0;
+}
+
+static void mt2701_btmrg_shutdown(struct snd_pcm_substream *substream,
+				  struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mt2701_afe_private *afe_priv = afe->platform_priv;
+
+	/* if the other direction stream is not occupied */
+	if (!afe_priv->mrg_enable[!substream->stream]) {
+		regmap_update_bits(afe->regmap, AFE_DAIBT_CON0,
+				   AFE_DAIBT_CON0_DAIBT_EN, 0);
+		regmap_update_bits(afe->regmap, AFE_MRGIF_CON,
+				   AFE_MRGIF_CON_MRG_EN, 0);
+		regmap_update_bits(afe->regmap, AFE_MRGIF_CON,
+				   AFE_MRGIF_CON_MRG_I2S_EN, 0);
+		regmap_update_bits(afe->regmap, AUDIO_TOP_CON4,
+				   AUDIO_TOP_CON4_PDN_MRGIF,
+				   AUDIO_TOP_CON4_PDN_MRGIF);
+	}
+	afe_priv->mrg_enable[substream->stream] = 0;
+}
+
 static int mt2701_simple_fe_startup(struct snd_pcm_substream *substream,
 				    struct snd_soc_dai *dai)
 {
@@ -514,6 +594,13 @@ static const struct snd_soc_dai_ops mt2701_afe_i2s_ops = {
 	.set_sysclk	= mt2701_afe_i2s_set_sysclk,
 };
 
+/* MRG BE DAIs */
+static struct snd_soc_dai_ops mt2701_btmrg_ops = {
+	.startup = mt2701_btmrg_startup,
+	.shutdown = mt2701_btmrg_shutdown,
+	.hw_params = mt2701_btmrg_hw_params,
+};
+
 static struct snd_soc_dai_driver mt2701_afe_pcm_dais[] = {
 	/* FE DAIs: memory intefaces to CPU */
 	{
@@ -566,6 +653,36 @@ static struct snd_soc_dai_driver mt2701_afe_pcm_dais[] = {
 		},
 		.ops = &mt2701_single_memif_dai_ops,
 	},
+	{
+		.name = "PCM_BT_DL",
+		.id = MT2701_MEMIF_DLBT,
+		.suspend = mtk_afe_dai_suspend,
+		.resume = mtk_afe_dai_resume,
+		.playback = {
+			.stream_name = "DLBT",
+			.channels_min = 1,
+			.channels_max = 1,
+			.rates = (SNDRV_PCM_RATE_8000
+				| SNDRV_PCM_RATE_16000),
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &mt2701_single_memif_dai_ops,
+	},
+	{
+		.name = "PCM_BT_UL",
+		.id = MT2701_MEMIF_ULBT,
+		.suspend = mtk_afe_dai_suspend,
+		.resume = mtk_afe_dai_resume,
+		.capture = {
+			.stream_name = "ULBT",
+			.channels_min = 1,
+			.channels_max = 1,
+			.rates = (SNDRV_PCM_RATE_8000
+				| SNDRV_PCM_RATE_16000),
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &mt2701_single_memif_dai_ops,
+	},
 	/* BE DAIs */
 	{
 		.name = "I2S0",
@@ -665,6 +782,28 @@ static struct snd_soc_dai_driver mt2701_afe_pcm_dais[] = {
 		.ops = &mt2701_afe_i2s_ops,
 		.symmetric_rates = 1,
 	},
+	{
+		.name = "MRG BT",
+		.id = MT2701_IO_MRG,
+		.playback = {
+			.stream_name = "BT Playback",
+			.channels_min = 1,
+			.channels_max = 1,
+			.rates = (SNDRV_PCM_RATE_8000
+				| SNDRV_PCM_RATE_16000),
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.capture = {
+			.stream_name = "BT Capture",
+			.channels_min = 1,
+			.channels_max = 1,
+			.rates = (SNDRV_PCM_RATE_8000
+				| SNDRV_PCM_RATE_16000),
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+		.ops = &mt2701_btmrg_ops,
+		.symmetric_rates = 1,
+	}
 };
 
 static const struct snd_kcontrol_new mt2701_afe_o00_mix[] = {
-- 
1.9.1