src/dev/ps2.cc

   1 /*
   2  * Copyright (c) 2011 ARM Limited
   3  * All rights reserved
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer;
  18  * redistributions in binary form must reproduce the above copyright
  19  * notice, this list of conditions and the following disclaimer in the
  20  * documentation and/or other materials provided with the distribution;
  21  * neither the name of the copyright holders nor the names of its
  22  * contributors may be used to endorse or promote products derived from
  23  * this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  * Authors: Ali Saidi
  38  */
  39
  40 #include <list>
  41
  42 #include "base/misc.hh"
  43 #include "dev/ps2.hh"
  44 #include "x11keysym/keysym.h"
  45
  46 namespace Ps2 {
  47
  48 /** Table to convert simple key symbols (0x00XX) into ps2 bytes. Lower byte
  49  * is the scan code to send and upper byte is if a modifier is required to
  50  * generate it. The table generates us keyboard codes, (e.g. the guest is
  51  * supposed to recognize the keyboard as en_US). A new table would be required
  52  * for another locale.
  53  */
  54
  55 static const uint16_t keySymToPs2Byte[128] = {
  56 // 0 / 8   1 / 9   2 / A   3 / B   4 / C   5 / D   6 / E   7 / F
  57    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x00-0x07
  58    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x08-0x0f
  59    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x10-0x17
  60    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x18-0x1f
  61    0x0029, 0x0116, 0x0152, 0x0126, 0x0125, 0x012e, 0x013d, 0x0052, // 0x20-0x27
  62    0x0146, 0x0145, 0x013e, 0x0155, 0x0041, 0x004e, 0x0049, 0x004a, // 0x28-0x2f
  63    0x0045, 0x0016, 0x001e, 0x0026, 0x0025, 0x002e, 0x0036, 0x003d, // 0x30-0x37
  64    0x003e, 0x0046, 0x014c, 0x004c, 0x0141, 0x0055, 0x0149, 0x014a, // 0x38-0x3f
  65    0x011e, 0x011c, 0x0132, 0x0121, 0x0123, 0x0124, 0x012b, 0x0134, // 0x40-0x47
  66    0x0133, 0x0143, 0x013b, 0x0142, 0x014b, 0x013a, 0x0131, 0x0144, // 0x48-0x4f
  67    0x014d, 0x0115, 0x012d, 0x011b, 0x012c, 0x013c, 0x012a, 0x011d, // 0x50-0x57
  68    0x0122, 0x0135, 0x011a, 0x0054, 0x005d, 0x005b, 0x0136, 0x014e, // 0x58-0x5f
  69    0x000e, 0x001c, 0x0032, 0x0021, 0x0023, 0x0024, 0x002b, 0x0034, // 0x60-0x67
  70    0x0033, 0x0043, 0x003b, 0x0042, 0x004b, 0x003a, 0x0031, 0x0044, // 0x68-0x6f
  71    0x004d, 0x0015, 0x002d, 0x001b, 0x002c, 0x003c, 0x002a, 0x001d, // 0x70-0x77
  72    0x0022, 0x0035, 0x001a, 0x0154, 0x015d, 0x015b, 0x010e, 0x0000  // 0x78-0x7f
  73 };
  74
  75 const uint8_t ShiftKey = 0x12;
  76 const uint8_t BreakKey = 0xf0;
  77 const uint8_t ExtendedKey = 0xe0;
  78 const uint32_t UpperKeys = 0xff00;
  79
  80 void
  81 keySymToPs2(uint32_t key, bool down, bool &cur_shift,
  82         std::list<uint8_t> &keys)
  83 {
  84     if (key <= XK_asciitilde) {
  85         uint16_t tmp = keySymToPs2Byte[key];
  86         uint8_t code = tmp & 0xff;
  87         bool shift = tmp >> 8;
  88
  89         if (down) {
  90             if (!cur_shift && shift) {
  91                 keys.push_back(ShiftKey);
  92                 cur_shift = true;
  93             }
  94             keys.push_back(code);
  95         } else {
  96             if (cur_shift && !shift) {
  97                 keys.push_back(BreakKey);
  98                 keys.push_back(ShiftKey);
  99                 cur_shift = false;
 100             }
 101             keys.push_back(BreakKey);
 102             keys.push_back(code);
 103         }
 104     } else {
 105         if ((key & UpperKeys) == UpperKeys) {
 106             bool extended = false;
 107             switch (key) {
 108               case XK_BackSpace:
 109                 keys.push_back(0x66);
 110                 break;
 111               case XK_Tab:
 112                 keys.push_back(0x0d);
 113                 break;
 114               case XK_Return:
 115                 keys.push_back(0x5a);
 116                 break;
 117              case XK_Escape:
 118                 keys.push_back(0x76);
 119                 break;
 120              case XK_Delete:
 121                 extended = true;
 122                 keys.push_back(0x71);
 123                 break;
 124              case XK_Home:
 125                 extended = true;
 126                 keys.push_back(0x6c);
 127                 break;
 128              case XK_Left:
 129                 extended = true;
 130                 keys.push_back(0x6b);
 131                 break;
 132              case XK_Right:
 133                 extended = true;
 134                 keys.push_back(0x74);
 135                 break;
 136              case XK_Down:
 137                 extended = true;
 138                 keys.push_back(0x72);
 139                 break;
 140              case XK_Up:
 141                 extended = true;
 142                 keys.push_back(0x75);
 143                 break;
 144              case XK_Page_Up:
 145                 extended = true;
 146                 keys.push_back(0x7d);
 147                 break;
 148              case XK_Page_Down:
 149                 extended = true;
 150                 keys.push_back(0x7a);
 151                 break;
 152              case XK_End:
 153                 extended = true;
 154                 keys.push_back(0x69);
 155                 break;
 156              case XK_Shift_L:
 157                 keys.push_back(0x12);
 158                 if (down)
 159                     cur_shift = true;
 160                 else
 161                     cur_shift = false;
 162                 break;
 163              case XK_Shift_R:
 164                 keys.push_back(0x59);
 165                 if (down)
 166                     cur_shift = true;
 167                 else
 168                     cur_shift = false;
 169                 break;
 170              case XK_Control_L:
 171                 keys.push_back(0x14);
 172                 break;
 173              case XK_Control_R:
 174                 extended = true;
 175                 keys.push_back(0x14);
 176                 break;
 177              default:
 178                warn("Unknown extended key %#x\n", key);
 179                return;
 180             }
 181
 182             if (extended) {
 183                 if (down) {
 184                     keys.push_front(ExtendedKey);
 185                 } else {
 186                     keys.push_front(BreakKey);
 187                     keys.push_front(ExtendedKey);
 188                 }
 189             } else {
 190                 if (!down)
 191                     keys.push_front(BreakKey);
 192             }
 193         } // upper keys
 194     } // extended keys
 195     return;
 196 }
 197
 198 } /* namespace Ps2 */
 199