1 files changed, 56 insertions, 0 deletions

diff --git a/sound/soc/codecs/sn95031.c b/sound/soc/codecs/sn95031.c
index 40e285df9ae5..b49d79017d3a 100644
--- a/sound/soc/codecs/sn95031.c
+++ b/sound/soc/codecs/sn95031.c
@@ -34,6 +34,7 @@
 #include <sound/soc-dapm.h>
 #include <sound/initval.h>
 #include <sound/tlv.h>
+#include <sound/jack.h>
 #include "sn95031.h"
 
 #define SN95031_RATES (SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100)
@@ -649,6 +650,61 @@ struct snd_soc_dai_driver sn95031_dais[] = {
 },
 };
 
+static inline void sn95031_disable_jack_btn(struct snd_soc_codec *codec)
+{
+        snd_soc_write(codec, SN95031_BTNCTRL2, 0x00);
+}
+
+static inline void sn95031_enable_jack_btn(struct snd_soc_codec *codec)
+{
+        snd_soc_write(codec, SN95031_BTNCTRL1, 0x77);
+        snd_soc_write(codec, SN95031_BTNCTRL2, 0x01);
+}
+
+static int sn95031_get_headset_state(struct snd_soc_jack *mfld_jack)
+{
+        /* Defaulting to HEADSET for now.
+         * will change after adding soc-jack detection apis */
+        int jack_type = SND_JACK_HEADSET;
+
+        pr_debug("jack type detected = %d\n", jack_type);
+        if (jack_type == SND_JACK_HEADSET)
+                sn95031_enable_jack_btn(mfld_jack->codec);
+        return jack_type;
+}
+
+void sn95031_jack_detection(struct mfld_jack_data *jack_data)
+{
+        unsigned int status;
+        unsigned int mask = SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_HEADSET;
+
+        pr_debug("interrupt id read in sram = 0x%x\n", jack_data->intr_id);
+        if (jack_data->intr_id & 0x1) {
+                pr_debug("short_push detected\n");
+                status = SND_JACK_HEADSET | SND_JACK_BTN_0;
+        } else if (jack_data->intr_id & 0x2) {
+                pr_debug("long_push detected\n");
+                status = SND_JACK_HEADSET | SND_JACK_BTN_1;
+        } else if (jack_data->intr_id & 0x4) {
+                pr_debug("headset or headphones inserted\n");
+                status = sn95031_get_headset_state(jack_data->mfld_jack);
+        } else if (jack_data->intr_id & 0x8) {
+                pr_debug("headset or headphones removed\n");
+                status = 0;
+                sn95031_disable_jack_btn(jack_data->mfld_jack->codec);
+        } else {
+                pr_err("unidentified interrupt\n");
+                return;
+        }
+
+        snd_soc_jack_report(jack_data->mfld_jack, status, mask);
+        /*button pressed and released so we send explicit button release */
+        if ((status & SND_JACK_BTN_0) | (status & SND_JACK_BTN_1))
+                snd_soc_jack_report(jack_data->mfld_jack,
+                                SND_JACK_HEADSET, mask);
+}
+EXPORT_SYMBOL_GPL(sn95031_jack_detection);
+
 /* codec registration */
 static int sn95031_codec_probe(struct snd_soc_codec *codec)
 {