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  1. /*
  2.  * Copyright (C) 2003 Josef Cejka
  3.  * Copyright (C) 2005 Jakub Jermar
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. #include <arch/drivers/keyboard.h>
  31. #include <console/chardev.h>
  32. #include <console/console.h>
  33. #include <putchar.h>
  34. #include <synch/spinlock.h>
  35. #include <synch/waitq.h>
  36. #include <typedefs.h>
  37. #include <print.h>
  38.  
  39. static void keyboard_enable(void);
  40. static void keyboard_disable(void);
  41.  
  42. static chardev_t kbrd;
  43. static chardev_operations_t ops = {
  44.     .resume = keyboard_enable,
  45.     .suspend = keyboard_disable
  46. };
  47.  
  48.  
  49. int kb_disable;
  50.  
  51.  
  52. /** Initialize keyboard subsystem. */
  53. void keyboard_init(void)
  54. {
  55.     chardev_initialize(&kbrd, &ops);
  56.     stdin = &kbrd;
  57.     kb_disable = 0;
  58. }
  59.  
  60. /** Process keyboard interrupt. */
  61. void keyboard(void)
  62. {
  63.     if(kb_disable) return;
  64.     char ch;
  65.  
  66.     ch = ski_getchar();
  67.     if(ch==13) ch=10;
  68.     if(ch) chardev_push_character(&kbrd, ch);
  69.    
  70. }
  71.  
  72. /* Called from getc(). */
  73. void keyboard_enable(void)
  74. {
  75.     kb_disable=0;
  76. }
  77.  
  78. /* Called from getc(). */
  79. void keyboard_disable(void)
  80. {
  81.     kb_disable=1;  
  82. }
  83.