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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 <arch/cp0.h>
  34. #include <putchar.h>
  35. #include <synch/spinlock.h>
  36. #include <synch/waitq.h>
  37. #include <typedefs.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. /** Initialize keyboard subsystem. */
  49. void keyboard_init(void)
  50. {
  51.     cp0_unmask_int(KEYBOARD_IRQ);
  52.     chardev_initialize(&kbrd, &ops);
  53.     stdin = &kbrd;
  54. }
  55.  
  56. /** Process keyboard interrupt. */
  57. void keyboard(void)
  58. {
  59.     char ch;
  60.  
  61.     ch = *((char *) KEYBOARD_ADDRESS);
  62.     chardev_push_character(&kbrd, ch);
  63. }
  64.  
  65. /* Called from getc(). */
  66. void keyboard_enable(void)
  67. {
  68.     cp0_unmask_int(KEYBOARD_IRQ);
  69. }
  70.  
  71. /* Called from getc(). */
  72. void keyboard_disable(void)
  73. {
  74.     cp0_mask_int(KEYBOARD_IRQ);
  75. }
  76.