From e8c4b0cb9de5dfe854e9f74248beb122a431009a Mon Sep 17 00:00:00 2001
From: surkhe <surkeh@protonmail.com>
Date: Fri, 16 Jul 2021 20:57:12 -0700
Subject: [PATCH] Scuti tested, tilt is working

---
 hanvon-libusb.c | 56 ++++++++++++++++++++++++++++++++++---------------
 1 file changed, 39 insertions(+), 17 deletions(-)

diff --git a/hanvon-libusb.c b/hanvon-libusb.c
index 9a9da69..493e4a2 100644
--- a/hanvon-libusb.c
+++ b/hanvon-libusb.c
@@ -3,14 +3,15 @@
  *
  *       Filename:  hanvon-libusb.c
  *
- *    Description:  Libusb GP0504 handler prototype
+ *    Description:  libusb Hanvon tablet driver    
  *
  *        Version:  0.1 
  *        Created:  08/17/2020 04:05:14 PM
  *       Revision:  none
  *       Compiler:  gcc
  *
- *         Author:  surkeh@protonmail.com
+ *   Maintaned by:  scuti@teknik.io      
+ *                  surkeh@protonmail.com
  *
  * =====================================================================================
  */
@@ -137,9 +138,9 @@ void callback_gp0504 (struct libusb_transfer *tx) { // for callback
                 0x02: button press
                 0x01: touching
             */
-            err = libevdev_uinput_write_event(
-                ud, EV_KEY, BTN_TOOL_PEN, msg->is_move & (0x80|0x10));
+            err = libevdev_uinput_write_event(ud, EV_KEY, BTN_TOOL_PEN, msg->is_move & (0x80|0x10));
             if(err) { DEBUG("err: %d\n",err); }
+
             if(msg->is_move & (0x80|0x10)) {
                 msg->x_movement = htobe16(msg->x_movement);
                 //DEBUG("Set X to %x\n",msg->x_movement);
@@ -150,14 +151,18 @@ void callback_gp0504 (struct libusb_transfer *tx) { // for callback
                 err = libevdev_uinput_write_event(ud, EV_ABS, ABS_Y, msg->y_movement);
                 if(err) { DEBUG("err: %d\n",err); }
             }
-            err = libevdev_uinput_write_event(
-                ud, EV_ABS, ABS_PRESSURE, msg->pressure);
+
+            err = libevdev_uinput_write_event(ud, EV_ABS, ABS_PRESSURE, msg->pressure);
+            if(err) { DEBUG("err: %d\n",err); }
+            err = libevdev_uinput_write_event(ud, EV_ABS, ABS_TILT_X, msg->y_tilt);
+            if(err) { DEBUG("err: %d\n",err); }
+            err = libevdev_uinput_write_event(ud, EV_ABS, ABS_TILT_Y, msg->x_tilt);
             if(err) { DEBUG("err: %d\n",err); }
             err = libevdev_uinput_write_event(ud, EV_KEY, BTN_LEFT, msg->is_move & 0x01);
             if(err) { DEBUG("err: %d\n",err); }
-            err = libevdev_uinput_write_event(
-                ud, EV_KEY, BTN_RIGHT, (msg->is_move & 0x02) / 2);
+            err = libevdev_uinput_write_event(ud, EV_KEY, BTN_RIGHT, (msg->is_move & 0x02) / 2);
             if(err) { DEBUG("err: %d\n",err); }
+
             // data[1]:
             // 0x10 = lift,         0x90 = close,           0x91 = press
             // 0x12 = btn (lift),   0x92 = btn (close),     0x93 = btn (press)
@@ -196,30 +201,30 @@ int init_ctrl(struct libusb_device * const d, struct libevdev **evdev, struct li
     libevdev_enable_event_code((*evdev), EV_KEY, BTN_TOOL_PEN, NULL);
     libevdev_enable_event_code((*evdev), EV_KEY, BTN_LEFT, NULL);  // pen tap 
     libevdev_enable_event_code((*evdev), EV_KEY, BTN_RIGHT, NULL); // pen button
-    
-    libevdev_enable_event_type((*evdev), EV_ABS); // enable absolute position
+    libevdev_enable_event_type((*evdev), EV_ABS); // enable absolute position, pressure, tilt
+
     abs = malloc(sizeof(struct input_absinfo));
+    // set up absolute x coordinate input
     abs->value = 0x1000;
     abs->minimum = 0;
     abs->maximum = 0x27DE;
     abs->fuzz = 0;
     abs->flat = 0;
     abs->resolution = 40;
-    if(libevdev_enable_event_code((*evdev), EV_ABS, ABS_X, abs)<0) // pen button
-    {
+    if(libevdev_enable_event_code((*evdev), EV_ABS, ABS_X, abs)<0) {
         DEBUG("%s","failed to register absolute x\n");
     }
-    abs = malloc(sizeof(struct input_absinfo));
+    // set up absolute y coordinate input
     abs->value = 0x1000;
     abs->minimum = 0;
     abs->maximum = 0x1cfe;
     abs->fuzz = 0;
     abs->flat = 0;
     abs->resolution = 40;
-    if(libevdev_enable_event_code((*evdev), EV_ABS, ABS_Y, abs)<0) // pen button
-    {
-        DEBUG("%s","failed to register absolute x\n");
+    if(libevdev_enable_event_code((*evdev), EV_ABS, ABS_Y, abs)<0) {
+        DEBUG("%s","failed to register absolute y\n");
     }
+    // set up pressure input
     abs -> value = 0;
     abs -> minimum = 0;
     abs -> maximum = 0xff;
@@ -227,6 +232,23 @@ int init_ctrl(struct libusb_device * const d, struct libevdev **evdev, struct li
     if(libevdev_enable_event_code((*evdev), EV_ABS, ABS_PRESSURE, abs)<0) {
         DEBUG("%s","failed to register pressure\n");        
     }
+    // set up tilt x input
+    abs -> value = 0;
+    abs -> minimum = 0;
+    abs -> maximum = AM_MAX_TILT_X;
+    abs -> resolution = 0;
+    if(libevdev_enable_event_code((*evdev), EV_ABS, ABS_TILT_X, abs)<0) {
+        DEBUG("%s","failed to register x tilt\n");        
+    }
+    // set up tilt y input
+    abs -> value = 0;
+    abs -> minimum = 0;
+    abs -> maximum = AM_MAX_TILT_Y;
+    abs -> resolution = 0;
+    if(libevdev_enable_event_code((*evdev), EV_ABS, ABS_TILT_Y, abs)<0) {
+        DEBUG("%s","failed to register y tilt\n");        
+    }
+
     switch(desc.idProduct) {
         case PRODUCT_ID_GP0504:
             libevdev_set_name((*evdev), "Hanvon Graphicpal GP0504");
@@ -238,6 +260,7 @@ int init_ctrl(struct libusb_device * const d, struct libevdev **evdev, struct li
     }
     int err = libevdev_uinput_create_from_device((*evdev), LIBEVDEV_UINPUT_OPEN_MANAGED, uidev);
     printf("Initializing controls status: %x, \n", uidev);
+    free(abs);
     return is_ok;
 }
 
@@ -360,4 +383,3 @@ libusb_device *FindHanvon( libusb_context **context)
     return found;
 }
 
-