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  1. /*
  2.  * Copyright (c) 2009 Jakub Jermar
  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 genarch
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief Keyboard processing.
  35.  */
  36.  
  37. #include <genarch/kbrd/kbrd.h>
  38. #include <genarch/kbrd/scanc.h>
  39.  
  40. #ifdef CONFIG_PC_KBD
  41. #include <genarch/kbrd/scanc_pc.h>
  42. #endif
  43.  
  44. #ifdef CONFIG_SUN_KBD
  45. #include <genarch/kbrd/scanc_sun.h>
  46. #endif
  47.  
  48. #include <synch/spinlock.h>
  49. #include <console/chardev.h>
  50. #include <console/console.h>
  51. #include <proc/thread.h>
  52. #include <arch.h>
  53. #include <macros.h>
  54.  
  55. #define IGNORE_CODE  0x7f
  56. #define KEY_RELEASE  0x80
  57.  
  58. #define PRESSED_SHIFT     (1 << 0)
  59. #define PRESSED_CAPSLOCK  (1 << 1)
  60. #define LOCKED_CAPSLOCK   (1 << 0)
  61.  
  62. static indev_t kbrdout;
  63.  
  64. indev_operations_t kbrdout_ops = {
  65.     .poll = NULL
  66. };
  67.  
  68. SPINLOCK_INITIALIZE(keylock);   /**< keylock protects keyflags and lockflags. */
  69. static volatile int keyflags;   /**< Tracking of multiple keypresses. */
  70. static volatile int lockflags;  /**< Tracking of multiple keys lockings. */
  71.  
  72. /** Process release of key.
  73.  *
  74.  * @param sc Scancode of the key being released.
  75.  */
  76. static void key_released(wchar_t sc)
  77. {
  78.     spinlock_lock(&keylock);
  79.     switch (sc) {
  80.     case SC_LSHIFT:
  81.     case SC_RSHIFT:
  82.         keyflags &= ~PRESSED_SHIFT;
  83.         break;
  84.     case SC_CAPSLOCK:
  85.         keyflags &= ~PRESSED_CAPSLOCK;
  86.         if (lockflags & LOCKED_CAPSLOCK)
  87.             lockflags &= ~LOCKED_CAPSLOCK;
  88.         else
  89.             lockflags |= LOCKED_CAPSLOCK;
  90.         break;
  91.     default:
  92.         break;
  93.     }
  94.     spinlock_unlock(&keylock);
  95. }
  96.  
  97. /** Process keypress.
  98.  *
  99.  * @param sc Scancode of the key being pressed.
  100.  */
  101. static void key_pressed(wchar_t sc)
  102. {
  103.     bool letter;
  104.     bool shift;
  105.     bool capslock;
  106.    
  107.     spinlock_lock(&keylock);
  108.     switch (sc) {
  109.     case SC_LSHIFT:
  110.     case SC_RSHIFT:
  111.         keyflags |= PRESSED_SHIFT;
  112.         break;
  113.     case SC_CAPSLOCK:
  114.         keyflags |= PRESSED_CAPSLOCK;
  115.         break;
  116.     case SC_SCAN_ESCAPE:
  117.         break;
  118.     default:
  119.         letter = islower(sc_primary_map[sc]);
  120.         shift = keyflags & PRESSED_SHIFT;
  121.         capslock = (keyflags & PRESSED_CAPSLOCK) ||
  122.             (lockflags & LOCKED_CAPSLOCK);
  123.        
  124.         if ((letter) && (capslock))
  125.             shift = !shift;
  126.        
  127.         if (shift)
  128.             indev_push_character(stdin, sc_secondary_map[sc]);
  129.         else
  130.             indev_push_character(stdin, sc_primary_map[sc]);
  131.         break;
  132.     }
  133.     spinlock_unlock(&keylock);
  134. }
  135.  
  136. static void kkbrd(void *arg)
  137. {
  138.     indev_t *in = (indev_t *) arg;
  139.    
  140.     while (true) {
  141.         wchar_t sc = _getc(in);
  142.        
  143.         if (sc == IGNORE_CODE)
  144.             continue;
  145.        
  146.         if (sc & KEY_RELEASE)
  147.             key_released((sc ^ KEY_RELEASE) & 0x7f);
  148.         else
  149.             key_pressed(sc & 0x7f);
  150.     }
  151. }
  152.  
  153. void kbrd_init(indev_t *devin)
  154. {
  155.     indev_initialize("kbrd", &kbrdout, &kbrdout_ops);
  156.     thread_t *thread
  157.         = thread_create(kkbrd, devin, TASK, 0, "kkbrd", false);
  158.    
  159.     if (thread) {
  160.         stdin = &kbrdout;
  161.         thread_ready(thread);
  162.     }
  163. }
  164.  
  165. /** @}
  166.  */
  167.