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  1. /*
  2.  * Copyright (c) 2009 Jiri Svoboda
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup kbd_ctl
  30.  * @ingroup kbd
  31.  * @{
  32.  */
  33. /**
  34.  * @file
  35.  * @brief   Serial TTY-like keyboard controller driver.
  36.  */
  37.  
  38. #include <kbd.h>
  39. #include <kbd/kbd.h>
  40. #include <kbd/keycode.h>
  41. #include <kbd_ctl.h>
  42.  
  43. static void parse_ds_start(int scancode);
  44. static void parse_ds_e(int scancode);
  45. static void parse_ds_e1(int scancode);
  46. static void parse_ds_e2(int scancode);
  47. static void parse_ds_e2a(int scancode);
  48. static void parse_ds_e2b(int scancode);
  49.  
  50. static void parse_leaf(int scancode, int *map, size_t map_length);
  51.  
  52. enum dec_state {
  53.     ds_start,
  54.     ds_e,
  55.     ds_e1,
  56.     ds_e2,
  57.     ds_e2a,
  58.     ds_e2b
  59. };
  60.  
  61. static int map_start[] = {
  62.  
  63.     [0x60] = KC_BACKTICK,
  64.  
  65.     [0x31] = KC_1,
  66.     [0x32] = KC_2,
  67.     [0x33] = KC_3,
  68.     [0x34] = KC_4,
  69.     [0x35] = KC_5,
  70.     [0x36] = KC_6,
  71.     [0x37] = KC_7,
  72.     [0x38] = KC_8,
  73.     [0x39] = KC_9,
  74.     [0x30] = KC_0,
  75.  
  76.     [0x2d] = KC_MINUS,
  77.     [0x3d] = KC_EQUALS,
  78.     [0x08] = KC_BACKSPACE,
  79.  
  80.     [0x0f] = KC_TAB,
  81.  
  82.     [0x71] = KC_Q,
  83.     [0x77] = KC_W,
  84.     [0x65] = KC_E,
  85.     [0x72] = KC_R,
  86.     [0x74] = KC_T,
  87.     [0x79] = KC_Y,
  88.     [0x75] = KC_U,
  89.     [0x69] = KC_I,
  90.     [0x6f] = KC_O,
  91.     [0x70] = KC_P,
  92.  
  93.     [0x5b] = KC_LBRACKET,
  94.     [0x5d] = KC_RBRACKET,
  95.  
  96. //  [0x3a] = KC_CAPS_LOCK,
  97.  
  98.     [0x61] = KC_A,
  99.     [0x73] = KC_S,
  100.     [0x64] = KC_D,
  101.     [0x66] = KC_F,
  102.     [0x67] = KC_G,
  103.     [0x68] = KC_H,
  104.     [0x6a] = KC_J,
  105.     [0x6b] = KC_K,
  106.     [0x6c] = KC_L,
  107.  
  108.     [0x3b] = KC_SEMICOLON,
  109.     [0x27] = KC_QUOTE,
  110.     [0x5c] = KC_BACKSLASH,
  111.  
  112. //  [0x2a] = KC_LSHIFT,
  113.  
  114.     [0x7a] = KC_Z,
  115.     [0x78] = KC_X,
  116.     [0x63] = KC_C,
  117.     [0x76] = KC_V,
  118.     [0x62] = KC_B,
  119.     [0x6e] = KC_N,
  120.     [0x6d] = KC_M,
  121.  
  122.     [0x2c] = KC_COMMA,
  123.     [0x2e] = KC_PERIOD,
  124.     [0x2f] = KC_SLASH,
  125.  
  126. //  [0x36] = KC_RSHIFT,
  127.  
  128. //  [0x1d] = KC_LCTRL,
  129. //  [0x38] = KC_LALT,
  130.     [0x20] = KC_SPACE,
  131.  
  132.     [0x1b] = KC_ESCAPE,
  133.  
  134.     [0x0a] = KC_ENTER,
  135.     [0x0d] = KC_ENTER
  136.  
  137. /*
  138.     [0x1] = KC_PRNSCR,
  139.     [0x1] = KC_SCROLL_LOCK,
  140.     [0x1] = KC_PAUSE,
  141. */
  142. };
  143.  
  144. static int map_e1[] =
  145. {
  146.     [0x50] = KC_F1,
  147.     [0x51] = KC_F2,
  148.     [0x52] = KC_F3,
  149.     [0x53] = KC_F4,
  150. };
  151.  
  152. static int map_e2[] =
  153. {
  154.     [0x41] = KC_UP,
  155.     [0x42] = KC_DOWN,
  156.     [0x44] = KC_LEFT,
  157.     [0x43] = KC_RIGHT,
  158. };
  159.  
  160. static int map_e2a[] =
  161. {
  162.     [0x35] = KC_F5,
  163.     [0x37] = KC_F6,
  164.     [0x38] = KC_F7,
  165.     [0x39] = KC_F8,
  166. };
  167.  
  168. static int map_e2b[] =
  169. {
  170.     [0x30] = KC_F9,
  171.     [0x31] = KC_F10,
  172.     [0x32] = KC_F11,
  173.     [0x33] = KC_F12,
  174. };
  175.  
  176.  
  177. static enum dec_state ds;
  178.  
  179. void kbd_ctl_parse_scancode(int scancode)
  180. {
  181.     switch (ds) {
  182.     case ds_start:  parse_ds_start(scancode); break;
  183.     case ds_e:  parse_ds_e(scancode); break;
  184.     case ds_e1: parse_ds_e1(scancode); break;
  185.     case ds_e2: parse_ds_e2(scancode); break;
  186.     case ds_e2a:    parse_ds_e2a(scancode); break;
  187.     case ds_e2b:    parse_ds_e2b(scancode); break;
  188.     }
  189. }
  190.  
  191. static void parse_ds_start(int scancode)
  192. {
  193.     if (scancode < 0 || scancode >= sizeof(map_start) / sizeof(int))
  194.         return;
  195.  
  196.     if (scancode == 0x1b) {
  197.         ds = ds_e;
  198.         return;
  199.     }
  200.  
  201.     parse_leaf(scancode, map_start, sizeof(map_start) / sizeof(int));
  202. }
  203.  
  204. static void parse_ds_e(int scancode)
  205. {
  206.     if (scancode < 0 || scancode >= 0x80) return;
  207.  
  208.     switch (scancode) {
  209.     case 0x4f: ds = ds_e1; return;
  210.     case 0x5b: ds = ds_e2; return;
  211.     case 0x1b: ds = ds_start; break;
  212.     default: ds = ds_start; return;
  213.     }
  214.  
  215.     kbd_push_ev(KE_PRESS, KC_ESCAPE);
  216. }
  217.  
  218. static void parse_ds_e1(int scancode)
  219. {
  220.     parse_leaf(scancode, map_e1, sizeof(map_e1) / sizeof(int));
  221. }
  222.  
  223. static void parse_ds_e2(int scancode)
  224. {
  225.     switch (scancode) {
  226.     case 0x31: ds = ds_e2a; break;
  227.     case 0x32: ds = ds_e2b; break;
  228.     default: ds = ds_start; break;
  229.     }
  230.  
  231.     parse_leaf(scancode, map_e2, sizeof(map_e2) / sizeof(int));
  232. }
  233.  
  234. static void parse_ds_e2a(int scancode)
  235. {
  236.     parse_leaf(scancode, map_e2a, sizeof(map_e2a) / sizeof(int));
  237. }
  238.  
  239. static void parse_ds_e2b(int scancode)
  240. {
  241.     parse_leaf(scancode, map_e2b, sizeof(map_e2b) / sizeof(int));
  242. }
  243.  
  244. static void parse_leaf(int scancode, int *map, size_t map_length)
  245. {
  246.     unsigned int key;
  247.  
  248.     ds = ds_start;
  249.  
  250.     if (scancode < 0 || scancode >= map_length)
  251.         return;
  252.  
  253.     key = map[scancode];
  254.     if (key != 0)
  255.         kbd_push_ev(KE_PRESS, key);
  256. }
  257.  
  258.  
  259. /**
  260.  * @}
  261.  */
  262.