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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. #include <arch/drivers/arc.h>
  39.  
  40. static void keyboard_enable(void);
  41. static void keyboard_disable(void);
  42. static void arc_kb_disable(void);
  43. static void arc_kb_enable(void);
  44.  
  45. static chardev_t kbrd;
  46.  
  47. static chardev_operations_t arc_ops = {
  48.     .resume = arc_kb_enable,
  49.     .suspend = arc_kb_disable
  50. };
  51.  
  52. static chardev_operations_t msim_ops = {
  53.     .resume = keyboard_enable,
  54.     .suspend = keyboard_disable
  55. };
  56.  
  57. static int arc_kb_enabled;
  58.  
  59. /** Initialize keyboard subsystem. */
  60. void keyboard_init(void)
  61. {
  62.     if (arc_enabled()) {
  63.         chardev_initialize(&kbrd, &arc_ops);
  64.         arc_kb_enabled = 1;
  65.     } else {
  66.         cp0_unmask_int(KEYBOARD_IRQ);
  67.         chardev_initialize(&kbrd, &msim_ops);
  68.     }
  69.     stdin = &kbrd;
  70. }
  71.  
  72. /** Process keyboard interrupt. */
  73. void keyboard(void)
  74. {
  75.     char ch;
  76.  
  77.     ch = *((char *) KEYBOARD_ADDRESS);
  78.     chardev_push_character(&kbrd, ch);
  79. }
  80.  
  81. /* Called from getc(). */
  82. void keyboard_enable(void)
  83. {
  84.     cp0_unmask_int(KEYBOARD_IRQ);
  85. }
  86.  
  87. /* Called from getc(). */
  88. void keyboard_disable(void)
  89. {
  90.     cp0_mask_int(KEYBOARD_IRQ);
  91. }
  92.  
  93. /*****************************/
  94. /* Arc keyboard */
  95.  
  96. void keyboard_poll(void)
  97. {
  98.     int ch;
  99.  
  100.     if (!arc_enabled() || !arc_kb_enabled)
  101.         return;
  102.     while ((ch = arc_getchar()) != -1)
  103.         chardev_push_character(&kbrd, ch);     
  104. }
  105.  
  106. static void arc_kb_enable(void)
  107. {
  108.     arc_kb_enabled = 1;
  109. }
  110.  
  111. /* Called from getc(). */
  112. static void arc_kb_disable(void)
  113. {
  114.     arc_kb_enabled = 0;
  115. }
  116.