Comply with MT syncronization protocol

The latest semantic clarifications in the kernel MT protocol allow
SYN_MT_REPORT to be sent without actually sending any finger data. Add
a mask to the hardware data so that the data actually read can be
tracked.

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

1 files changed, 22 insertions, 0 deletions

diff --git a/src/hwdata.h b/src/hwdata.h
index 38ffc6b..aa589e0 100644
--- a/src/hwdata.h
+++ b/src/hwdata.h
@@ -34,6 +34,16 @@
 #define MT_BUTTON_HWHEEL_LEFT 5
 #define MT_BUTTON_HWHEEL_RIGHT 6
 
+#define BIT_MT_TOUCH_MAJOR 0
+#define BIT_MT_TOUCH_MINOR 1
+#define BIT_MT_WIDTH_MAJOR 2
+#define BIT_MT_WIDTH_MINOR 3
+#define BIT_MT_ORIENTATION 4
+#define BIT_MT_PRESSURE 5
+#define BIT_MT_POSITION_X 6
+#define BIT_MT_POSITION_Y 7
+#define BIT_MT_CNT 8
+
 struct FingerData {
         int touch_major, touch_minor;
         int width_major, width_minor;
@@ -41,8 +51,20 @@ struct FingerData {
         int position_x, position_y;
 };
 
+/**
+ * struct HWData - hardware reads
+ *
+ * @finger: finger data
+ * @mask: bits corresponding to data actually read (readonly)
+ * @mread: bits corresponding to data in progress (writeonly)
+ * @button: bitmask of buttons
+ * @nfinger: number of fingers actually read (readonly)
+ * @nread: number of fingers in progress (writeonly)
+ *
+ */
 struct HWData {
         struct FingerData finger[DIM_FINGER];
+        unsigned mask[DIM_FINGER], mread[DIM_FINGER];
         unsigned button;
         int nfinger, nread;
 };