ASoC: omap: rx51: Add earphone support

Earphone in Nokia RX-51/N900 is connected to left HP output of B part of the
TLV320AIC34 dual codec. In RX-51 the codec A is used as a traditional codec
and the codec B as an auxiliary device.

Audio from codec A goes via the codec B to earphone:
MONO_LOUT of A -> LINE2R of B (B interconnects) -> HPLOUT of B -> Earphone.

Take earphone into use by utilizing the recent ASoC auxiliary and
cross-device support.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 50 insertions, 0 deletions

diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
index 251afbe303c6..2d7d4115cb71 100644
--- a/sound/soc/omap/rx51.c
+++ b/sound/soc/omap/rx51.c
@@ -242,6 +242,10 @@ static const struct snd_soc_dapm_widget aic34_dapm_widgets[] = {
         SND_SOC_DAPM_HP("Headphone Jack", rx51_hp_event),
 };
 
+static const struct snd_soc_dapm_widget aic34_dapm_widgetsb[] = {
+        SND_SOC_DAPM_SPK("Earphone", NULL),
+};
+
 static const struct snd_soc_dapm_route audio_map[] = {
         {"Ext Spk", NULL, "HPLOUT"},
         {"Ext Spk", NULL, "HPROUT"},
@@ -252,6 +256,11 @@ static const struct snd_soc_dapm_route audio_map[] = {
         {"Mic Bias 2V", NULL, "DMic"},
 };
 
+static const struct snd_soc_dapm_route audio_mapb[] = {
+        {"b LINE2R", NULL, "MONO_LOUT"},
+        {"Earphone", NULL, "b HPLOUT"},
+};
+
 static const char *spk_function[] = {"Off", "On"};
 static const char *input_function[] = {"ADC", "Digital Mic"};
 static const char *jack_function[] = {"Off", "TV-OUT", "Headphone"};
@@ -271,6 +280,10 @@ static const struct snd_kcontrol_new aic34_rx51_controls[] = {
                      rx51_get_jack, rx51_set_jack),
 };
 
+static const struct snd_kcontrol_new aic34_rx51_controlsb[] = {
+        SOC_DAPM_PIN_SWITCH("Earphone"),
+};
+
 static int rx51_aic34_init(struct snd_soc_pcm_runtime *rtd)
 {
         struct snd_soc_codec *codec = rtd->codec;
@@ -314,6 +327,24 @@ static int rx51_aic34_init(struct snd_soc_pcm_runtime *rtd)
         return err;
 }
 
+static int rx51_aic34b_init(struct snd_soc_dapm_context *dapm)
+{
+        int err;
+
+        err = snd_soc_add_controls(dapm->codec, aic34_rx51_controlsb,
+                                   ARRAY_SIZE(aic34_rx51_controlsb));
+        if (err < 0)
+                return err;
+
+        err = snd_soc_dapm_new_controls(dapm, aic34_dapm_widgetsb,
+                                        ARRAY_SIZE(aic34_dapm_widgetsb));
+        if (err < 0)
+                return 0;
+
+        return snd_soc_dapm_add_routes(dapm, audio_mapb,
+                                       ARRAY_SIZE(audio_mapb));
+}
+
 /* Digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link rx51_dai[] = {
         {
@@ -328,11 +359,30 @@ static struct snd_soc_dai_link rx51_dai[] = {
         },
 };
 
+struct snd_soc_aux_dev rx51_aux_dev[] = {
+        {
+                .name = "TLV320AIC34b",
+                .codec_name = "tlv320aic3x-codec.2-0019",
+                .init = rx51_aic34b_init,
+        },
+};
+
+static struct snd_soc_codec_conf rx51_codec_conf[] = {
+        {
+                .dev_name = "tlv320aic3x-codec.2-0019",
+                .name_prefix = "b",
+        },
+};
+
 /* Audio card */
 static struct snd_soc_card rx51_sound_card = {
         .name = "RX-51",
         .dai_link = rx51_dai,
         .num_links = ARRAY_SIZE(rx51_dai),
+        .aux_dev = rx51_aux_dev,
+        .num_aux_devs = ARRAY_SIZE(rx51_aux_dev),
+        .codec_conf = rx51_codec_conf,
+        .num_configs = ARRAY_SIZE(rx51_codec_conf),
 };
 
 static struct platform_device *rx51_snd_device;