Add integrated button property to capabilities

The new Apple unibody macbooks have a trackpad with an integrated
button, which needs special treatment. This patch tests the device
for an integrated button and keeps the result in the capabilities
struture.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/src/capabilities.c b/src/capabilities.c
index 804b626..065c810 100644
--- a/src/capabilities.c
+++ b/src/capabilities.c
@@ -47,6 +47,14 @@ static int getabs(struct input_absinfo *abs, int key, int fd)
         return rc >= 0;
 }
 
+static int has_integrated_button(const struct Capabilities *cap)
+{
+        static const int bcm5974_vmask_ibt = 1;
+        if (strcmp(cap->devname, "bcm5974"))
+                return 0;
+        return cap->devid.version & bcm5974_vmask_ibt;
+}
+
 int read_capabilities(struct Capabilities *cap, int fd)
 {
         unsigned long evbits[nlongs(EV_MAX)];
@@ -85,6 +93,7 @@ int read_capabilities(struct Capabilities *cap, int fd)
         SETABS(cap, position_y, absbits, ABS_MT_POSITION_Y, fd);
 
         cap->has_mtdata = cap->has_position_x && cap->has_position_y;
+        cap->has_ibt = has_integrated_button(cap);
 
         cap->xfuzz = cap->abs_position_x.fuzz;
         cap->yfuzz = cap->abs_position_y.fuzz;
@@ -114,6 +123,7 @@ void output_capabilities(const struct Capabilities *cap)
         ADDCAP(line, cap, middle);
         ADDCAP(line, cap, right);
         ADDCAP(line, cap, mtdata);
+        ADDCAP(line, cap, ibt);
         ADDCAP(line, cap, touch_major);
         ADDCAP(line, cap, touch_minor);
         ADDCAP(line, cap, width_major);