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Diffstat (limited to 'include/linux/input/mt.h')
-rw-r--r--include/linux/input/mt.h57
1 files changed, 54 insertions, 3 deletions
diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h
index f86737586e19..cc5cca774bab 100644
--- a/include/linux/input/mt.h
+++ b/include/linux/input/mt.h
@@ -15,12 +15,41 @@
#define TRKID_MAX 0xffff
+#define INPUT_MT_POINTER 0x0001 /* pointer device, e.g. trackpad */
+#define INPUT_MT_DIRECT 0x0002 /* direct device, e.g. touchscreen */
+#define INPUT_MT_DROP_UNUSED 0x0004 /* drop contacts not seen in frame */
+#define INPUT_MT_TRACK 0x0008 /* use in-kernel tracking */
+
/**
* struct input_mt_slot - represents the state of an input MT slot
* @abs: holds current values of ABS_MT axes for this slot
+ * @frame: last frame at which input_mt_report_slot_state() was called
+ * @key: optional driver designation of this slot
*/
struct input_mt_slot {
int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
+ unsigned int frame;
+ unsigned int key;
+};
+
+/**
+ * struct input_mt - state of tracked contacts
+ * @trkid: stores MT tracking ID for the next contact
+ * @num_slots: number of MT slots the device uses
+ * @slot: MT slot currently being transmitted
+ * @flags: input_mt operation flags
+ * @frame: increases every time input_mt_sync_frame() is called
+ * @red: reduced cost matrix for in-kernel tracking
+ * @slots: array of slots holding current values of tracked contacts
+ */
+struct input_mt {
+ int trkid;
+ int num_slots;
+ int slot;
+ unsigned int flags;
+ unsigned int frame;
+ int *red;
+ struct input_mt_slot slots[];
};
static inline void input_mt_set_value(struct input_mt_slot *slot,
@@ -35,12 +64,18 @@ static inline int input_mt_get_value(const struct input_mt_slot *slot,
return slot->abs[code - ABS_MT_FIRST];
}
-int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots);
+static inline bool input_mt_is_active(const struct input_mt_slot *slot)
+{
+ return input_mt_get_value(slot, ABS_MT_TRACKING_ID) >= 0;
+}
+
+int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots,
+ unsigned int flags);
void input_mt_destroy_slots(struct input_dev *dev);
-static inline int input_mt_new_trkid(struct input_dev *dev)
+static inline int input_mt_new_trkid(struct input_mt *mt)
{
- return dev->trkid++ & TRKID_MAX;
+ return mt->trkid++ & TRKID_MAX;
}
static inline void input_mt_slot(struct input_dev *dev, int slot)
@@ -64,4 +99,20 @@ void input_mt_report_slot_state(struct input_dev *dev,
void input_mt_report_finger_count(struct input_dev *dev, int count);
void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count);
+void input_mt_sync_frame(struct input_dev *dev);
+
+/**
+ * struct input_mt_pos - contact position
+ * @x: horizontal coordinate
+ * @y: vertical coordinate
+ */
+struct input_mt_pos {
+ s16 x, y;
+};
+
+int input_mt_assign_slots(struct input_dev *dev, int *slots,
+ const struct input_mt_pos *pos, int num_pos);
+
+int input_mt_get_slot_by_key(struct input_dev *dev, int key);
+
#endif