Add support for ABS_MT_DISTANCE

In the upcoming 2.6.38 kernel, support for hovering is introduced.
Add the ABS_MT_DISTANCE to the extended set of handled ABS_MT events.

The change is binary compatible with existing libraries.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

3 files changed, 10 insertions, 4 deletions

diff --git a/include/mtdev.h b/include/mtdev.h
index df74e95..ba682c5 100644
--- a/include/mtdev.h
+++ b/include/mtdev.h
@@ -63,6 +63,11 @@ extern "C" {
 #define ABS_MT_SLOT             0x2f    /* MT slot being modified */
 #endif
 
+/* includes available in 2.6.38 */
+#ifndef ABS_MT_DISTANCE
+#define ABS_MT_DISTANCE         0x3b    /* Contact hover distance */
+#endif
+
 #define MT_ID_NULL      (-1)
 #define MT_ID_MIN       0
 #define MT_ID_MAX       65535
diff --git a/src/common.h b/src/common.h
index 43b5688..2ec8eb8 100644
--- a/src/common.h
+++ b/src/common.h
@@ -111,7 +111,7 @@ struct mtdev {
         struct mtdev_state *state;
 };
 
-#define MT_ABS_SIZE 11
+#define MT_ABS_SIZE 12
 
 static const unsigned int mtdev_map_abs2mt[ABS_CNT] = {
  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
@@ -121,12 +121,12 @@ static const unsigned int mtdev_map_abs2mt[ABS_CNT] = {
  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
  0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008,
- 0x0009, 0x000a, 0x000b, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0009, 0x000a, 0x000b, 0x000c, 0x0000, 0x0000, 0x0000, 0x0000,
 };
 
 static const unsigned int mtdev_map_mt2abs[MT_ABS_SIZE] = {
  0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
- 0x0038, 0x0039, 0x003a,
+ 0x0038, 0x0039, 0x003a, 0x003b,
 };
 
 static inline int mtdev_is_absmt(unsigned int code)
diff --git a/test/mtdev-mapgen.c b/test/mtdev-mapgen.c
index dc1ba91..c34cb7e 100644
--- a/test/mtdev-mapgen.c
+++ b/test/mtdev-mapgen.c
@@ -30,7 +30,7 @@
 #include <mtdev.h>
 #include <stdio.h>
 
-#define MT_ABS_SIZE     11
+#define MT_ABS_SIZE     12
 #define MT_SLOT_ABS_EVENTS {    \
         ABS_MT_TOUCH_MAJOR,     \
         ABS_MT_TOUCH_MINOR,     \
@@ -43,6 +43,7 @@
         ABS_MT_BLOB_ID,         \
         ABS_MT_TRACKING_ID,     \
         ABS_MT_PRESSURE,        \
+        ABS_MT_DISTANCE,        \
 }
 
 static unsigned int cabs2mt[ABS_CNT];