src/hw.c

   1 /***************************************************************************
   2  *
   3  * Multitouch protocol X driver
   4  * Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se>
   5  * Copyright (C) 2009,2010 Nokia Corporation
   6  *
   7  * Adaptation to libmtdev and Linux multi-touch-protocol B (slotted)
   8  * Copyright (C) 2010 Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  23  *
  24  **************************************************************************/
  25
  26 #include <string.h>
  27 #include <linux/input.h>
  28 #include <xf86.h>
  29 #include <mtdev.h>
  30
  31 #include "hw.h"
  32
  33 void hw_init(struct mtev_hw_state *hw)
  34 {
  35         int i;
  36         memset(hw, 0, sizeof(struct mtev_hw_state));
  37         for (i = 0; i < HW_MAX_SLOTS; i++)
  38             hw->slot[i].tracking_id = INVALID_TRACKING_ID;
  39 }
  40
  41 bool hw_read(struct mtev_hw_state *hw, const struct input_event* ev)
  42 {
  43         // xf86Msg(X_INFO, "event: %d %d %d\n", ev->type, ev->code, ev->value);
  44
  45         switch (ev->type) {
  46         case EV_SYN:
  47                 switch (ev->code) {
  48                 case SYN_REPORT:
  49                         return 1;
  50
  51                 case SYN_MT_REPORT:
  52                         xf86Msg(X_ERROR, "libmtdev sent SYN_MT_REPORT");
  53                         break;
  54                 }
  55                 break;
  56
  57         case EV_ABS:
  58                 if (ev->code == ABS_MT_SLOT) {
  59                         if (ev->value >= HW_MAX_SLOTS) {
  60                                 xf86Msg(X_ERROR, "Slot usage (%d) exceeds limit of %d", ev->value, HW_MAX_SLOTS);
  61                                 hw->current_slot = INVALID_SLOT;
  62                         } else
  63                                 hw->current_slot = ev->value;
  64                         break;
  65                 }
  66
  67                 if (hw->current_slot == INVALID_SLOT)
  68                         break;
  69
  70                 switch (ev->code) {
  71                 case ABS_MT_POSITION_X:
  72                         hw->slot[hw->current_slot].position_x = ev->value;
  73                         break;
  74                 case ABS_MT_POSITION_Y:
  75                         hw->slot[hw->current_slot].position_y = ev->value;
  76                         break;
  77                 case ABS_MT_TOUCH_MAJOR:
  78                         hw->slot[hw->current_slot].touch_major = ev->value;
  79                         break;
  80                 case ABS_MT_TOUCH_MINOR:
  81                         hw->slot[hw->current_slot].touch_minor = ev->value;
  82                         break;
  83                 case ABS_MT_WIDTH_MAJOR:
  84                         hw->slot[hw->current_slot].width_major = ev->value;
  85                         break;
  86                 case ABS_MT_WIDTH_MINOR:
  87                         hw->slot[hw->current_slot].width_minor = ev->value;
  88                         break;
  89                 case ABS_MT_ORIENTATION:
  90                         hw->slot[hw->current_slot].orientation = ev->value;
  91                         break;
  92                 case ABS_MT_PRESSURE:
  93                         hw->slot[hw->current_slot].pressure = ev->value;
  94                         break;
  95                 case ABS_MT_TRACKING_ID:
  96                         if (ev->value == -1) /* Slot contact has been released */
  97                                 hw->slot[hw->current_slot].tracking_id = INVALID_TRACKING_ID;
  98                         else
  99                                 hw->slot[hw->current_slot].tracking_id = hw->current_slot;//ev->value;
 100                         break;
 101                 }
 102         }
 103
 104         return 0;
 105 }