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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * Copyright (C) 2006 Josef Cejka
  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. /** @addtogroup kbdia32 ia32
  31.  * @brief   HelenOS ia32 arch dependent parts of uspace keyboard handler.
  32.  * @ingroup  kbd
  33.  * @{
  34.  */
  35. /** @file
  36.  */
  37.  
  38. #include <arch/kbd.h>
  39. #include <ipc/ipc.h>
  40.  
  41. #define SPECIAL     255
  42. #define KEY_RELEASE 0x80
  43.  
  44. /**
  45.  * These codes read from i8042 data register are silently ignored.
  46.  */
  47. #define IGNORE_CODE 0x7f
  48.  
  49. #define PRESSED_SHIFT       (1<<0)
  50. #define PRESSED_CAPSLOCK    (1<<1)
  51. #define LOCKED_CAPSLOCK     (1<<0)
  52.  
  53. /** Scancodes. */
  54. #define SC_ESC      0x01
  55. #define SC_BACKSPACE    0x0e
  56. #define SC_LSHIFT   0x2a
  57. #define SC_RSHIFT   0x36
  58. #define SC_CAPSLOCK 0x3a
  59. #define SC_SPEC_ESCAPE  0xe0
  60. #define SC_LEFTARR      0x4b
  61. #define SC_RIGHTARR     0x4d
  62. #define SC_UPARR        0x48
  63. #define SC_DOWNARR      0x50
  64. #define SC_DELETE       0x53
  65. #define SC_HOME         0x47
  66. #define SC_END          0x4f
  67.  
  68. #define FUNCTION_KEYS 0x100
  69.  
  70. static volatile int keyflags;       /**< Tracking of multiple keypresses. */
  71. static volatile int lockflags;      /**< Tracking of multiple keys lockings. */
  72.  
  73. /** Primary meaning of scancodes. */
  74. static int sc_primary_map[] = {
  75.     SPECIAL, /* 0x00 */
  76.     SPECIAL, /* 0x01 - Esc */
  77.     '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
  78.     '\b', /* 0x0e - Backspace */
  79.     '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
  80.     SPECIAL, /* 0x1d - LCtrl */
  81.     'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
  82.     '`',
  83.     SPECIAL, /* 0x2a - LShift */
  84.     '\\',
  85.     'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
  86.     SPECIAL, /* 0x36 - RShift */
  87.     '*',
  88.     SPECIAL, /* 0x38 - LAlt */
  89.     ' ',
  90.     SPECIAL, /* 0x3a - CapsLock */
  91.     (FUNCTION_KEYS | 1), /* 0x3b - F1 */
  92.     (FUNCTION_KEYS | 2), /* 0x3c - F2 */
  93.     (FUNCTION_KEYS | 3), /* 0x3d - F3 */
  94.     (FUNCTION_KEYS | 4), /* 0x3e - F4 */
  95.     (FUNCTION_KEYS | 5), /* 0x3f - F5 */
  96.     (FUNCTION_KEYS | 6), /* 0x40 - F6 */
  97.     (FUNCTION_KEYS | 7), /* 0x41 - F7 */
  98.     (FUNCTION_KEYS | 8), /* 0x42 - F8 */
  99.     (FUNCTION_KEYS | 9), /* 0x43 - F9 */
  100.     (FUNCTION_KEYS | 10), /* 0x44 - F10 */
  101.     SPECIAL, /* 0x45 - NumLock */
  102.     SPECIAL, /* 0x46 - ScrollLock */
  103.     '7', '8', '9', '-',
  104.     '4', '5', '6', '+',
  105.     '1', '2', '3',
  106.     '0', '.',
  107.     SPECIAL, /* 0x54 - Alt-SysRq */
  108.     SPECIAL, /* 0x55 - F11/F12/PF1/FN */
  109.     SPECIAL, /* 0x56 - unlabelled key next to LAlt */
  110.     (FUNCTION_KEYS | 11), /* 0x57 - F11 */
  111.     (FUNCTION_KEYS | 12), /* 0x58 - F12 */
  112.     SPECIAL, /* 0x59 */
  113.     SPECIAL, /* 0x5a */
  114.     SPECIAL, /* 0x5b */
  115.     SPECIAL, /* 0x5c */
  116.     SPECIAL, /* 0x5d */
  117.     SPECIAL, /* 0x5e */
  118.     SPECIAL, /* 0x5f */
  119.     SPECIAL, /* 0x60 */
  120.     SPECIAL, /* 0x61 */
  121.     SPECIAL, /* 0x62 */
  122.     SPECIAL, /* 0x63 */
  123.     SPECIAL, /* 0x64 */
  124.     SPECIAL, /* 0x65 */
  125.     SPECIAL, /* 0x66 */
  126.     SPECIAL, /* 0x67 */
  127.     SPECIAL, /* 0x68 */
  128.     SPECIAL, /* 0x69 */
  129.     SPECIAL, /* 0x6a */
  130.     SPECIAL, /* 0x6b */
  131.     SPECIAL, /* 0x6c */
  132.     SPECIAL, /* 0x6d */
  133.     SPECIAL, /* 0x6e */
  134.     SPECIAL, /* 0x6f */
  135.     SPECIAL, /* 0x70 */
  136.     SPECIAL, /* 0x71 */
  137.     SPECIAL, /* 0x72 */
  138.     SPECIAL, /* 0x73 */
  139.     SPECIAL, /* 0x74 */
  140.     SPECIAL, /* 0x75 */
  141.     SPECIAL, /* 0x76 */
  142.     SPECIAL, /* 0x77 */
  143.     SPECIAL, /* 0x78 */
  144.     SPECIAL, /* 0x79 */
  145.     SPECIAL, /* 0x7a */
  146.     SPECIAL, /* 0x7b */
  147.     SPECIAL, /* 0x7c */
  148.     SPECIAL, /* 0x7d */
  149.     SPECIAL, /* 0x7e */
  150.     SPECIAL, /* 0x7f */
  151. };
  152.  
  153. /** Secondary meaning of scancodes. */
  154. static int sc_secondary_map[] = {
  155.     SPECIAL, /* 0x00 */
  156.     0x1b, /* 0x01 - Esc */
  157.     '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
  158.     SPECIAL, /* 0x0e - Backspace */
  159.     '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
  160.     SPECIAL, /* 0x1d - LCtrl */
  161.     'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
  162.     '~',
  163.     SPECIAL, /* 0x2a - LShift */
  164.     '|',
  165.     'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
  166.     SPECIAL, /* 0x36 - RShift */
  167.     '*',
  168.     SPECIAL, /* 0x38 - LAlt */
  169.     ' ',
  170.     SPECIAL, /* 0x3a - CapsLock */
  171.     SPECIAL, /* 0x3b - F1 */
  172.     SPECIAL, /* 0x3c - F2 */
  173.     SPECIAL, /* 0x3d - F3 */
  174.     SPECIAL, /* 0x3e - F4 */
  175.     SPECIAL, /* 0x3f - F5 */
  176.     SPECIAL, /* 0x40 - F6 */
  177.     SPECIAL, /* 0x41 - F7 */
  178.     SPECIAL, /* 0x42 - F8 */
  179.     SPECIAL, /* 0x43 - F9 */
  180.     SPECIAL, /* 0x44 - F10 */
  181.     SPECIAL, /* 0x45 - NumLock */
  182.     SPECIAL, /* 0x46 - ScrollLock */
  183.     '7', '8', '9', '-',
  184.     '4', '5', '6', '+',
  185.     '1', '2', '3',
  186.     '0', '.',
  187.     SPECIAL, /* 0x54 - Alt-SysRq */
  188.     SPECIAL, /* 0x55 - F11/F12/PF1/FN */
  189.     SPECIAL, /* 0x56 - unlabelled key next to LAlt */
  190.     SPECIAL, /* 0x57 - F11 */
  191.     SPECIAL, /* 0x58 - F12 */
  192.     SPECIAL, /* 0x59 */
  193.     SPECIAL, /* 0x5a */
  194.     SPECIAL, /* 0x5b */
  195.     SPECIAL, /* 0x5c */
  196.     SPECIAL, /* 0x5d */
  197.     SPECIAL, /* 0x5e */
  198.     SPECIAL, /* 0x5f */
  199.     SPECIAL, /* 0x60 */
  200.     SPECIAL, /* 0x61 */
  201.     SPECIAL, /* 0x62 */
  202.     SPECIAL, /* 0x63 */
  203.     SPECIAL, /* 0x64 */
  204.     SPECIAL, /* 0x65 */
  205.     SPECIAL, /* 0x66 */
  206.     SPECIAL, /* 0x67 */
  207.     SPECIAL, /* 0x68 */
  208.     SPECIAL, /* 0x69 */
  209.     SPECIAL, /* 0x6a */
  210.     SPECIAL, /* 0x6b */
  211.     SPECIAL, /* 0x6c */
  212.     SPECIAL, /* 0x6d */
  213.     SPECIAL, /* 0x6e */
  214.     SPECIAL, /* 0x6f */
  215.     SPECIAL, /* 0x70 */
  216.     SPECIAL, /* 0x71 */
  217.     SPECIAL, /* 0x72 */
  218.     SPECIAL, /* 0x73 */
  219.     SPECIAL, /* 0x74 */
  220.     SPECIAL, /* 0x75 */
  221.     SPECIAL, /* 0x76 */
  222.     SPECIAL, /* 0x77 */
  223.     SPECIAL, /* 0x78 */
  224.     SPECIAL, /* 0x79 */
  225.     SPECIAL, /* 0x7a */
  226.     SPECIAL, /* 0x7b */
  227.     SPECIAL, /* 0x7c */
  228.     SPECIAL, /* 0x7d */
  229.     SPECIAL, /* 0x7e */
  230.     SPECIAL, /* 0x7f */
  231. };
  232.  
  233. irq_cmd_t i8042_cmds[1] = {
  234.     { CMD_PORT_READ_1, (void *)0x60, 0 }
  235. };
  236.  
  237. irq_code_t i8042_kbd = {
  238.     1,
  239.     i8042_cmds
  240. };
  241.  
  242. static int key_released(keybuffer_t *keybuffer, unsigned char key)
  243. {
  244.     switch (key) {
  245.         case SC_LSHIFT:
  246.         case SC_RSHIFT:
  247.             keyflags &= ~PRESSED_SHIFT;
  248.             break;
  249.         case SC_CAPSLOCK:
  250.             keyflags &= ~PRESSED_CAPSLOCK;
  251.             if (lockflags & LOCKED_CAPSLOCK)
  252.                 lockflags &= ~LOCKED_CAPSLOCK;
  253.                 else
  254.                 lockflags |= LOCKED_CAPSLOCK;
  255.             break;
  256.         default:
  257.             break;
  258.     }
  259. }
  260.  
  261. static int key_pressed(keybuffer_t *keybuffer, unsigned char key)
  262. {
  263.     int *map = sc_primary_map;
  264.     int ascii = sc_primary_map[key];
  265.     int shift, capslock;
  266.     int letter = 0;
  267.  
  268.     static int esc_count=0;
  269.  
  270.    
  271.     if ( key == SC_ESC ) {
  272.         esc_count++;
  273.         if ( esc_count == 3 ) {
  274.             __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  275.         }  
  276.     } else {
  277.         esc_count=0;
  278.     }
  279.    
  280.    
  281.  
  282.     switch (key) {
  283.         case SC_LSHIFT:
  284.         case SC_RSHIFT:
  285.                 keyflags |= PRESSED_SHIFT;
  286.             break;
  287.         case SC_CAPSLOCK:
  288.             keyflags |= PRESSED_CAPSLOCK;
  289.             break;
  290.         case SC_SPEC_ESCAPE:
  291.             break;
  292.     /*  case SC_LEFTARR:
  293.             if (keybuffer_available(keybuffer) >= 3) {
  294.                 keybuffer_push(keybuffer, 0x1b);   
  295.                 keybuffer_push(keybuffer, 0x5b);   
  296.                 keybuffer_push(keybuffer, 0x44);   
  297.             }
  298.             break;
  299.         case SC_RIGHTARR:
  300.             if (keybuffer_available(keybuffer) >= 3) {
  301.                 keybuffer_push(keybuffer, 0x1b);   
  302.                 keybuffer_push(keybuffer, 0x5b);   
  303.                 keybuffer_push(keybuffer, 0x43);   
  304.             }
  305.             break;
  306.         case SC_UPARR:
  307.             if (keybuffer_available(keybuffer) >= 3) {
  308.                 keybuffer_push(keybuffer, 0x1b);   
  309.                 keybuffer_push(keybuffer, 0x5b);   
  310.                 keybuffer_push(keybuffer, 0x41);   
  311.             }
  312.             break;
  313.         case SC_DOWNARR:
  314.             if (keybuffer_available(keybuffer) >= 3) {
  315.                 keybuffer_push(keybuffer, 0x1b);   
  316.                 keybuffer_push(keybuffer, 0x5b);   
  317.                 keybuffer_push(keybuffer, 0x42);   
  318.             }
  319.             break;
  320.         case SC_HOME:
  321.             if (keybuffer_available(keybuffer) >= 3) {
  322.                 keybuffer_push(keybuffer, 0x1b);   
  323.                 keybuffer_push(keybuffer, 0x4f);   
  324.                 keybuffer_push(keybuffer, 0x48);   
  325.             }
  326.             break;
  327.         case SC_END:
  328.             if (keybuffer_available(keybuffer) >= 3) {
  329.                 keybuffer_push(keybuffer, 0x1b);   
  330.                 keybuffer_push(keybuffer, 0x4f);   
  331.                 keybuffer_push(keybuffer, 0x46);   
  332.             }
  333.             break;
  334.         case SC_DELETE:
  335.             if (keybuffer_available(keybuffer) >= 4) {
  336.                 keybuffer_push(keybuffer, 0x1b);   
  337.                 keybuffer_push(keybuffer, 0x5b);   
  338.                 keybuffer_push(keybuffer, 0x33);   
  339.                 keybuffer_push(keybuffer, 0x7e);   
  340.             }
  341.             break;
  342.     */  default:
  343.                 letter = ((ascii >= 'a') && (ascii <= 'z'));
  344.             capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
  345.             shift = keyflags & PRESSED_SHIFT;
  346.             if (letter && capslock)
  347.                 shift = !shift;
  348.             if (shift)
  349.                 map = sc_secondary_map;
  350.             if (map[key] != SPECIAL)
  351.                 keybuffer_push(keybuffer, map[key]);   
  352.             break;
  353.     }
  354. }
  355.  
  356. /** Register uspace irq handler
  357.  * @return
  358.  */
  359. int kbd_arch_init(void)
  360. {
  361.     return !(ipc_register_irq(1, &i8042_kbd));
  362. }
  363.  
  364. int kbd_arch_process(keybuffer_t *keybuffer, int scan_code)
  365. {
  366.     if (scan_code != IGNORE_CODE) {
  367.         if (scan_code & KEY_RELEASE)
  368.             key_released(keybuffer, scan_code ^ KEY_RELEASE);
  369.         else
  370.             key_pressed(keybuffer, scan_code);
  371.     }
  372.     return  1;
  373. }
  374.  
  375. /**
  376.  * @}
  377.  */
  378.  
  379.