Initial version of hid-multitouch-dkms packagev1.0.0

This is identical to jikos multitouch tree from 06APR2011.

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

1 files changed, 155 insertions, 0 deletions

diff --git a/usr/src/dkms_source_tree/input-mt.h b/usr/src/dkms_source_tree/input-mt.h
new file mode 100644
index 0000000..e53d274
--- /dev/null
+++ b/usr/src/dkms_source_tree/input-mt.h
@@ -0,0 +1,155 @@
+#ifndef _INPUT_MT_LOCAL_H
+#define _INPUT_MT_LOCAL_H
+
+/*
+ * Input Multitouch Library
+ *
+ * Copyright (c) 2010 Henrik Rydberg
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38)
+
+#include <linux/input/mt.h>
+
+#else
+
+#include <linux/input.h>
+
+#define MT_TOOL_MAX             1
+
+#define TRKID_MAX       0xffff
+#define TRKID_SGN       ((TRKID_MAX + 1) >> 1)
+
+static int trkid;
+
+static inline void input_abs_set_res(struct input_dev *dev,
+                                     unsigned int axis, int val)
+{
+        dev->absres[axis] = val;
+}
+
+static inline void input_mt_set_value(struct input_mt_slot *slot,
+                                      unsigned code, int value)
+{
+        slot->abs[code - ABS_MT_FIRST] = value;
+}
+
+static inline int input_mt_get_value(const struct input_mt_slot *slot,
+                                     unsigned code)
+{
+        return slot->abs[code - ABS_MT_FIRST];
+}
+
+static inline int input_mt_new_trkid(struct input_dev *dev)
+{
+        return trkid++ & TRKID_MAX;
+}
+
+/**
+ * input_mt_init_slots() - initialize MT input slots
+ * @dev: input device supporting MT events and finger tracking
+ * @num_slots: number of slots used by the device
+ *
+ * This function allocates all necessary memory for MT slot handling
+ * in the input device, prepares the ABS_MT_SLOT and
+ * ABS_MT_TRACKING_ID events for use and sets up appropriate buffers.
+ * May be called repeatedly. Returns -EINVAL if attempting to
+ * reinitialize with a different number of slots.
+ */
+static int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots)
+{
+        int ret;
+
+        if (dev->mt)
+                return dev->mtsize != num_slots ? -EINVAL : 0;
+
+        ret = input_mt_create_slots(dev, num_slots);
+        if (ret)
+                return ret;
+
+        input_set_abs_params(dev, ABS_MT_TRACKING_ID, 0, TRKID_MAX, 0, 0);
+        input_set_events_per_packet(dev, 6 * num_slots);
+
+        return 0;
+}
+
+/**
+ * input_mt_report_state() - report contact state
+ * @dev: input device with allocated MT slots
+ * @active: true if contact is active, false otherwise
+ *
+ * Reports an active touch via ABS_MT_TRACKING_ID. If active is
+ * true and the slot is currently inactive, a new tracking id is
+ * assigned to the slot.
+ */
+static void input_mt_report_slot_state(struct input_dev *dev, unsigned type,
+                                       bool active)
+{
+        struct input_mt_slot *mt = dev->mt;
+        int id;
+
+        if (!mt || !active) {
+                input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1);
+                return;
+        }
+
+        id = input_mt_get_value(&mt[dev->slot], ABS_MT_TRACKING_ID);
+        if (id < 0)
+                id = input_mt_new_trkid(dev);
+        input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, id);
+}
+
+/**
+ * input_mt_report_pointer_emulation() - common pointer emulation
+ * @dev: input device with allocated MT slots
+ *
+ * Performs legacy pointer emulation via BTN_TOUCH.
+ */
+static void input_mt_report_pointer_emulation(struct input_dev *dev, bool more)
+{
+        struct input_mt_slot *oldest = 0;
+        int oldid = trkid;
+        int count = 0;
+        int i;
+
+        for (i = 0; i < dev->mtsize; ++i) {
+                struct input_mt_slot *ps = &dev->mt[i];
+                int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
+
+                if (id < 0)
+                        continue;
+                if ((id - oldid) & TRKID_SGN) {
+                        oldest = ps;
+                        oldid = id;
+                }
+                count++;
+        }
+
+        input_event(dev, EV_KEY, BTN_TOUCH, count > 0);
+        input_event(dev, EV_KEY, BTN_TOOL_FINGER, count == 1);
+        input_event(dev, EV_KEY, BTN_TOOL_DOUBLETAP, count == 2);
+        input_event(dev, EV_KEY, BTN_TOOL_TRIPLETAP, count == 3);
+        input_event(dev, EV_KEY, BTN_TOOL_QUADTAP, count > 3);
+
+        if (oldest) {
+                int x = input_mt_get_value(oldest, ABS_MT_POSITION_X);
+                int y = input_mt_get_value(oldest, ABS_MT_POSITION_Y);
+                int p = input_mt_get_value(oldest, ABS_MT_PRESSURE);
+
+                input_event(dev, EV_ABS, ABS_X, x);
+                input_event(dev, EV_ABS, ABS_Y, y);
+                input_event(dev, EV_ABS, ABS_PRESSURE, p);
+        } else {
+                input_event(dev, EV_ABS, ABS_PRESSURE, 0);
+        }
+}
+
+#endif
+
+#endif