Bug 929987 - Fix orangutan on first boot for inari;r=davehunt

It seems like some devices (e.g. the inari) need a BTN_TOUCH event to "wake
up" the screen before they will start accepting input.

orng.c

@@ -48,8 +48,10 @@ enum {
   INPUT_DEVICE_CLASS_TOUCH_MT      = 0x00000010,
 
   /* The input device is a multi-touch touchscreen and needs MT_SYNC. */
-  INPUT_DEVICE_CLASS_TOUCH_MT_SYNC = 0x00000200
+  INPUT_DEVICE_CLASS_TOUCH_MT_SYNC = 0x00000200,
 
+  /* The device may need an initial BTN_DOWN event to "wake up" */
+  INPUT_DEVICE_CLASS_NEEDS_BTN_DOWN_WAKEUP = 0x00001000
 };
 
 static int global_tracking_id = 1;
@@ -384,7 +386,12 @@ uint32_t figure_out_events_device_reports(int fd) {
        strcmp(device_name, "elan-touchscreen") == 0) {
       device_classes |= INPUT_DEVICE_CLASS_TOUCH_MT_SYNC;
     }
-    //}
+
+    // some devices need an initial btn down event to "wake up"
+    if (strcmp(device_name, "cyttsp-i2c") == 0) {
+      device_classes |= INPUT_DEVICE_CLASS_NEEDS_BTN_DOWN_WAKEUP;
+    }
+
   // Is this an old style single-touch driver?
   } else if ((test_bit(BTN_TOUCH, key_bitmask)
               && test_bit(ABS_X, abs_bitmask)
@@ -461,6 +468,10 @@ int main(int argc, char *argv[])
 
   uint32_t device_flags = figure_out_events_device_reports(fd);
 
+  if (device_flags & INPUT_DEVICE_CLASS_NEEDS_BTN_DOWN_WAKEUP) {
+    write_event(fd, EV_KEY, BTN_TOUCH, 1);
+  }
+
   FILE *f = fopen(script_file, "r");
   if (!f) {
     printf("Unable to read file %s", argv[1]);