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 #include "x11keysym/keysym.h"
  42
  43 #include "base/misc.hh"
  44 #include "dev/ps2.hh"
  45
  46
  47 namespace Ps2 {
  48
  49 /** Table to convert simple key symbols (0x00XX) into ps2 bytes. Lower byte
  50  * is the scan code to send and upper byte is if a modifier is required to
  51  * generate it. The table generates us keyboard codes, (e.g. the guest is
  52  * supposed to recognize the keyboard as en_US). A new table would be required
  53  * for another locale.
  54  */
  55
  56 static const uint16_t keySymToPs2Byte[128] = {
  57 // 0 / 8   1 / 9   2 / A   3 / B   4 / C   5 / D   6 / E   7 / F
  58    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x00-0x07
  59    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x08-0x0f
  60    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x10-0x17
  61    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x18-0x1f
  62    0x0029, 0x0116, 0x0152, 0x0126, 0x0125, 0x012e, 0x013d, 0x0052, // 0x20-0x27
  63    0x0146, 0x0145, 0x013e, 0x0155, 0x0041, 0x004e, 0x0049, 0x004a, // 0x28-0x2f
  64    0x0045, 0x0016, 0x001e, 0x0026, 0x0025, 0x002e, 0x0036, 0x003d, // 0x30-0x37
  65    0x003e, 0x0046, 0x014c, 0x004c, 0x0141, 0x0055, 0x0149, 0x014a, // 0x38-0x3f
  66    0x011e, 0x011c, 0x0132, 0x0121, 0x0123, 0x0124, 0x012b, 0x0134, // 0x40-0x47
  67    0x0133, 0x0143, 0x013b, 0x0142, 0x014b, 0x013a, 0x0131, 0x0144, // 0x48-0x4f
  68    0x014d, 0x0115, 0x012d, 0x011b, 0x012c, 0x013c, 0x012a, 0x011d, // 0x50-0x57
  69    0x0122, 0x0135, 0x011a, 0x0054, 0x005d, 0x005b, 0x0136, 0x014e, // 0x58-0x5f
  70    0x000e, 0x001c, 0x0032, 0x0021, 0x0023, 0x0024, 0x002b, 0x0034, // 0x60-0x67
  71    0x0033, 0x0043, 0x003b, 0x0042, 0x004b, 0x003a, 0x0031, 0x0044, // 0x68-0x6f
  72    0x004d, 0x0015, 0x002d, 0x001b, 0x002c, 0x003c, 0x002a, 0x001d, // 0x70-0x77
  73    0x0022, 0x0035, 0x001a, 0x0154, 0x015d, 0x015b, 0x010e, 0x0000  // 0x78-0x7f
  74 };
  75
  76 const uint8_t ShiftKey = 0x12;
  77 const uint8_t BreakKey = 0xf0;
  78 const uint8_t ExtendedKey = 0xe0;
  79 const uint32_t UpperKeys = 0xff00;
  80
  81 void
  82 keySymToPs2(uint32_t key, bool down, bool &cur_shift,
  83         std::list<uint8_t> &keys)
  84 {
  85     if (key <= XK_asciitilde) {
  86         uint16_t tmp = keySymToPs2Byte[key];
  87         uint8_t code = tmp & 0xff;
  88         bool shift = tmp >> 8;
  89
  90         if (down) {
  91             if (!cur_shift && shift) {
  92                 keys.push_back(ShiftKey);
  93                 cur_shift = true;
  94             }
  95             keys.push_back(code);
  96         } else {
  97             if (cur_shift && !shift) {
  98                 keys.push_back(BreakKey);
  99                 keys.push_back(ShiftKey);
 100                 cur_shift = false;
 101             }
 102             keys.push_back(BreakKey);
 103             keys.push_back(code);
 104         }
 105     } else {
 106         if ((key & UpperKeys) == UpperKeys) {
 107             bool extended = false;
 108             switch (key) {
 109               case XK_BackSpace:
 110                 keys.push_back(0x66);
 111                 break;
 112               case XK_Tab:
 113                 keys.push_back(0x0d);
 114                 break;
 115               case XK_Return:
 116                 keys.push_back(0x5a);
 117                 break;
 118              case XK_Escape:
 119                 keys.push_back(0x76);
 120                 break;
 121              case XK_Delete:
 122                 extended = true;
 123                 keys.push_back(0x71);
 124                 break;
 125              case XK_Home:
 126                 extended = true;
 127                 keys.push_back(0x6c);
 128                 break;
 129              case XK_Left:
 130                 extended = true;
 131                 keys.push_back(0x6b);
 132                 break;
 133              case XK_Right:
 134                 extended = true;
 135                 keys.push_back(0x74);
 136                 break;
 137              case XK_Down:
 138                 extended = true;
 139                 keys.push_back(0x72);
 140                 break;
 141              case XK_Up:
 142                 extended = true;
 143                 keys.push_back(0x75);
 144                 break;
 145              case XK_Page_Up:
 146                 extended = true;
 147                 keys.push_back(0x7d);
 148                 break;
 149              case XK_Page_Down:
 150                 extended = true;
 151                 keys.push_back(0x7a);
 152                 break;
 153              case XK_End:
 154                 extended = true;
 155                 keys.push_back(0x69);
 156                 break;
 157              case XK_Shift_L:
 158                 keys.push_back(0x12);
 159                 if (down)
 160                     cur_shift = true;
 161                 else
 162                     cur_shift = false;
 163                 break;
 164              case XK_Shift_R:
 165                 keys.push_back(0x59);
 166                 if (down)
 167                     cur_shift = true;
 168                 else
 169                     cur_shift = false;
 170                 break;
 171              case XK_Control_L:
 172                 keys.push_back(0x14);
 173                 break;
 174              case XK_Control_R:
 175                 extended = true;
 176                 keys.push_back(0x14);
 177                 break;
 178              default:
 179                warn("Unknown extended key %#x\n", key);
 180                return;
 181             }
 182
 183             if (extended) {
 184                 if (down) {
 185                     keys.push_front(ExtendedKey);
 186                 } else {
 187                     keys.push_front(BreakKey);
 188                     keys.push_front(ExtendedKey);
 189                 }
 190             } else {
 191                 if (!down)
 192                     keys.push_front(BreakKey);
 193             }
 194         } // upper keys
 195     } // extended keys
 196     return;
 197 }
 198
 199 } /* namespace Ps2 */
 200