ASoC: sunxi: sun50i-codec-analog: Add earpiece

This adds the necessary registers and audio routes to play audio using
the Earpiece, that's supported on the A64.
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20190703184814.27191-1-luca@z3ntu.xyzSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sunxi/sun50i-codec-analog.c

@@ -49,6 +49,15 @@
 #define SUN50I_ADDA_OR_MIX_CTRL_DACR		1
 #define SUN50I_ADDA_OR_MIX_CTRL_DACL		0
 
+#define SUN50I_ADDA_EARPIECE_CTRL0	0x03
+#define SUN50I_ADDA_EARPIECE_CTRL0_EAR_RAMP_TIME	4
+#define SUN50I_ADDA_EARPIECE_CTRL0_ESPSR		0
+
+#define SUN50I_ADDA_EARPIECE_CTRL1	0x04
+#define SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_EN	7
+#define SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_MUTE	6
+#define SUN50I_ADDA_EARPIECE_CTRL1_ESP_VOL	0
+
 #define SUN50I_ADDA_LINEOUT_CTRL0	0x05
 #define SUN50I_ADDA_LINEOUT_CTRL0_LEN		7
 #define SUN50I_ADDA_LINEOUT_CTRL0_REN		6
@@ -172,6 +181,10 @@ static const DECLARE_TLV_DB_RANGE(sun50i_codec_lineout_vol_scale,
 	2, 31, TLV_DB_SCALE_ITEM(-4350, 150, 0),
 );
 
+static const DECLARE_TLV_DB_RANGE(sun50i_codec_earpiece_vol_scale,
+	0, 1, TLV_DB_SCALE_ITEM(TLV_DB_GAIN_MUTE, 0, 1),
+	2, 31, TLV_DB_SCALE_ITEM(-4350, 150, 0),
+);
 
 /* volume / mute controls */
 static const struct snd_kcontrol_new sun50i_a64_codec_controls[] = {
@@ -225,6 +238,15 @@ static const struct snd_kcontrol_new sun50i_a64_codec_controls[] = {
 		   SUN50I_ADDA_LINEOUT_CTRL0_LEN,
 		   SUN50I_ADDA_LINEOUT_CTRL0_REN, 1, 0),
 
+	SOC_SINGLE_TLV("Earpiece Playback Volume",
+		       SUN50I_ADDA_EARPIECE_CTRL1,
+		       SUN50I_ADDA_EARPIECE_CTRL1_ESP_VOL, 0x1f, 0,
+		       sun50i_codec_earpiece_vol_scale),
+
+	SOC_SINGLE("Earpiece Playback Switch",
+		   SUN50I_ADDA_EARPIECE_CTRL1,
+		   SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_MUTE, 1, 0),
+
 };
 
 static const char * const sun50i_codec_hp_src_enum_text[] = {
@@ -257,6 +279,20 @@ static const struct snd_kcontrol_new sun50i_codec_lineout_src[] = {
 		      sun50i_codec_lineout_src_enum),
 };
 
+static const char * const sun50i_codec_earpiece_src_enum_text[] = {
+	"DACR", "DACL", "Right Mixer", "Left Mixer",
+};
+
+static SOC_ENUM_SINGLE_DECL(sun50i_codec_earpiece_src_enum,
+			    SUN50I_ADDA_EARPIECE_CTRL0,
+			    SUN50I_ADDA_EARPIECE_CTRL0_ESPSR,
+			    sun50i_codec_earpiece_src_enum_text);
+
+static const struct snd_kcontrol_new sun50i_codec_earpiece_src[] = {
+	SOC_DAPM_ENUM("Earpiece Source Playback Route",
+		      sun50i_codec_earpiece_src_enum),
+};
+
 static const struct snd_soc_dapm_widget sun50i_a64_codec_widgets[] = {
 	/* DAC */
 	SND_SOC_DAPM_DAC("Left DAC", NULL, SUN50I_ADDA_MIX_DAC_CTRL,
@@ -285,6 +321,12 @@ static const struct snd_soc_dapm_widget sun50i_a64_codec_widgets[] = {
 			 SND_SOC_NOPM, 0, 0, sun50i_codec_lineout_src),
 	SND_SOC_DAPM_OUTPUT("LINEOUT"),
 
+	SND_SOC_DAPM_MUX("Earpiece Source Playback Route",
+			 SND_SOC_NOPM, 0, 0, sun50i_codec_earpiece_src),
+	SND_SOC_DAPM_OUT_DRV("Earpiece Amp", SUN50I_ADDA_EARPIECE_CTRL1,
+			     SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_EN, 0, NULL, 0),
+	SND_SOC_DAPM_OUTPUT("EARPIECE"),
+
 	/* Microphone inputs */
 	SND_SOC_DAPM_INPUT("MIC1"),
 
@@ -388,6 +430,14 @@ static const struct snd_soc_dapm_route sun50i_a64_codec_routes[] = {
 	{ "Line Out Source Playback Route", "Mono Differential",
 		"Right Mixer" },
 	{ "LINEOUT", NULL, "Line Out Source Playback Route" },
+
+	/* Earpiece Routes */
+	{ "Earpiece Source Playback Route", "DACL", "Left DAC" },
+	{ "Earpiece Source Playback Route", "DACR", "Right DAC" },
+	{ "Earpiece Source Playback Route", "Left Mixer", "Left Mixer" },
+	{ "Earpiece Source Playback Route", "Right Mixer", "Right Mixer" },
+	{ "Earpiece Amp", NULL, "Earpiece Source Playback Route" },
+	{ "EARPIECE", NULL, "Earpiece Amp" },
 };
 
 static const struct snd_soc_component_driver sun50i_codec_analog_cmpnt_drv = {