[alsa-devel] [PATCH] ASoC: rt5640: add headset detection function

[bardliao at realtek.com]

From: Bard Liao <bardliao at realtek.com>

Add headset detection function to rt5640 codec driver.

Signed-off-by: Bard Liao <bardliao at realtek.com>
---
 sound/soc/codecs/rt5640.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/rt5640.h |  2 ++
 2 files changed, 62 insertions(+)

diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c
index ce585e3..657efb7 100644
--- a/sound/soc/codecs/rt5640.c
+++ b/sound/soc/codecs/rt5640.c
@@ -1911,6 +1911,66 @@ static int rt5640_resume(struct snd_soc_codec *codec)
 #define rt5640_resume NULL
 #endif
 
+/**
+ * rt5640_headset_detect - Detect headset.
+ * @codec: SoC audio codec device.
+ * @jack_insert: Jack insert or not.
+ *
+ * Detect whether is headset or not when jack inserted.
+ *
+ * Returns detect status.
+ */
+int rt5640_headset_detect(struct snd_soc_codec *codec, int jack_insert)
+{
+	int jack_type;
+	int sclk_src = 0;
+	int reg63, reg64;
+
+	if (jack_insert) {
+		reg63 = snd_soc_read(codec, RT5640_PWR_ANLG1);
+		reg64 = snd_soc_read(codec, RT5640_PWR_ANLG2);
+		if (SND_SOC_BIAS_OFF == codec->dapm.bias_level) {
+			snd_soc_write(codec, RT5640_PWR_ANLG1, 0xa814);
+			sclk_src = snd_soc_read(codec, RT5640_GLB_CLK) &
+				RT5640_SCLK_SRC_MASK;
+			snd_soc_update_bits(codec, RT5640_GLB_CLK,
+				RT5640_SCLK_SRC_MASK,
+				0x2 << RT5640_SCLK_SRC_SFT);
+		}
+		snd_soc_update_bits(codec, RT5640_PWR_ANLG1,
+			RT5640_PWR_LDO2, RT5640_PWR_LDO2);
+		snd_soc_update_bits(codec, RT5640_PWR_ANLG2,
+			RT5640_PWR_MB1, RT5640_PWR_MB1);
+		snd_soc_update_bits(codec, RT5640_MICBIAS,
+			RT5640_MIC1_OVCD_MASK | RT5640_MIC1_OVTH_MASK |
+			RT5640_PWR_CLK25M_MASK | RT5640_PWR_MB_MASK,
+			RT5640_MIC1_OVCD_EN | RT5640_MIC1_OVTH_600UA |
+			RT5640_PWR_MB_PU | RT5640_PWR_CLK25M_PU);
+		snd_soc_update_bits(codec, RT5640_DUMMY1, 0x1, 0x1);
+		msleep(100);
+		if (snd_soc_read(codec, RT5640_IRQ_CTRL2) & 0x8)
+			jack_type = RT5640_HEADPHO_DET;
+		else
+			jack_type = RT5640_HEADSET_DET;
+		snd_soc_update_bits(codec, RT5640_IRQ_CTRL2,
+			RT5640_MB1_OC_CLR, 0);
+		if (SND_SOC_BIAS_OFF == codec->dapm.bias_level)
+			snd_soc_update_bits(codec, RT5640_GLB_CLK,
+				RT5640_SCLK_SRC_MASK, sclk_src);
+		snd_soc_write(codec, RT5640_PWR_ANLG1, reg63);
+		snd_soc_write(codec, RT5640_PWR_ANLG2, reg64);
+	} else {
+		snd_soc_update_bits(codec, RT5640_MICBIAS,
+			RT5640_MIC1_OVCD_MASK,
+			RT5640_MIC1_OVCD_DIS);
+
+		jack_type = RT5640_NO_JACK;
+	}
+
+	return jack_type;
+}
+EXPORT_SYMBOL_GPL(rt5640_headset_detect);
+
 #define RT5640_STEREO_RATES SNDRV_PCM_RATE_8000_96000
 #define RT5640_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S8)
diff --git a/sound/soc/codecs/rt5640.h b/sound/soc/codecs/rt5640.h
index c48286d..c3856c8 100644
--- a/sound/soc/codecs/rt5640.h
+++ b/sound/soc/codecs/rt5640.h
@@ -2089,4 +2089,6 @@ struct rt5640_priv {
 	int dmic_en;
 };
 
+int rt5640_headset_detect(struct snd_soc_codec *codec, int jack_insert);
+
 #endif
-- 
1.8.1.1.439.g50a6b54