ASoC: max98095: add jack detection

This change adds the logic to support using the jack detect mechanism built
in to the codec to detect both when a jack was inserted and what type of
jack is present.

This change also supports the use of an external mechanism for headphone
detection. If this mechanism exists, when the max98095_jack_detect function
is called, the hp_jack is simply passed NULL.

This change supports both simple headphones, powered headphones, microphones
and headsets with both headphones and a mic.

Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/sound/soc/codecs/max98095.h b/sound/soc/codecs/max98095.h
index 891584a0eb03..2ebbe4e894bf 100644
--- a/sound/soc/codecs/max98095.h
+++ b/sound/soc/codecs/max98095.h
@@ -175,11 +175,23 @@
 
 /* MAX98095 Registers Bit Fields */
 
+/* M98095_007_JACK_AUTO_STS */
+        #define M98095_MIC_IN                   (1<<3)
+        #define M98095_LO_IN                    (1<<5)
+        #define M98095_HP_IN                    (1<<6)
+        #define M98095_DDONE                    (1<<7)
+
 /* M98095_00F_HOST_CFG */
         #define M98095_SEG                      (1<<0)
         #define M98095_XTEN                     (1<<1)
         #define M98095_MDLLEN                   (1<<2)
 
+/* M98095_013_JACK_INT_EN */
+        #define M98095_IMIC_IN                  (1<<3)
+        #define M98095_ILO_IN                   (1<<5)
+        #define M98095_IHP_IN                   (1<<6)
+        #define M98095_IDDONE                   (1<<7)
+
 /* M98095_027_DAI1_CLKMODE, M98095_031_DAI2_CLKMODE, M98095_03B_DAI3_CLKMODE */
         #define M98095_CLKMODE_MASK             0xFF
 
@@ -255,6 +267,10 @@
         #define M98095_EQ2EN                    (1<<1)
         #define M98095_EQ1EN                    (1<<0)
 
+/* M98095_089_JACK_DET_AUTO */
+        #define M98095_PIN5EN                   (1<<2)
+        #define M98095_JDEN                     (1<<7)
+
 /* M98095_090_PWR_EN_IN */
         #define M98095_INEN                     (1<<7)
         #define M98095_MB2EN                    (1<<3)
@@ -296,4 +312,10 @@
 #define M98095_174_DAI1_BQ_BASE             0x74
 #define M98095_17E_DAI2_BQ_BASE             0x7E
 
+/* Default Delay used in Slew Rate Calculation for Jack detection */
+#define M98095_DEFAULT_SLEW_DELAY               0x18
+
+extern int max98095_jack_detect(struct snd_soc_codec *codec,
+        struct snd_soc_jack *hp_jack, struct snd_soc_jack *mic_jack);
+
 #endif