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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <arch/i8042.h> |
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| 30 | #include <arch/i8259.h> |
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| 31 | #include <arch/interrupt.h> |
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| 32 | #include <cpu.h> |
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| 33 | #include <arch/asm.h> |
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| 34 | #include <arch.h> |
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| 35 | #include <print.h> |
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| 508 | jermar | 36 | #include <synch/spinlock.h> |
| 37 | #include <typedefs.h> |
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| 1 | jermar | 38 | |
| 508 | jermar | 39 | /** |
| 1 | jermar | 40 | * i8042 processor driver. |
| 508 | jermar | 41 | * It takes care of low-level keyboard functions. |
| 1 | jermar | 42 | */ |
| 43 | |||
| 508 | jermar | 44 | #define SPECIAL '?' |
| 45 | #define KEY_RELEASE 0x80 |
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| 46 | |||
| 47 | static void key_released(__u8 sc); |
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| 48 | static void key_pressed(__u8 sc); |
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| 49 | |||
| 50 | #define PRESSED_SHIFT (1<<0) |
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| 51 | #define PRESSED_CAPSLOCK (1<<1) |
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| 52 | #define LOCKED_CAPSLOCK (1<<0) |
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| 53 | |||
| 54 | static spinlock_t keylock; /**< keylock protects keyflags and lockflags. */ |
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| 55 | static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
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| 56 | static volatile int lockflags; /**< Tracking of multiple lock keys keypresses. */ |
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| 57 | |||
| 58 | /** Primary meaning of scancodes. */ |
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| 59 | static char sc_primary_map[] = { |
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| 60 | SPECIAL, /* 0x00 */ |
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| 61 | SPECIAL, /* 0x01 - Esc */ |
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| 62 | '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', |
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| 63 | SPECIAL, /* 0x0e - Backspace */ |
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| 64 | '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', |
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| 65 | SPECIAL, /* 0x1d - LCtrl */ |
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| 66 | 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', |
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| 67 | '`', |
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| 68 | SPECIAL, /* 0x2a - LShift */ |
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| 69 | '\\', |
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| 70 | 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', |
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| 71 | SPECIAL, /* 0x36 - RShift */ |
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| 72 | '*', |
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| 73 | SPECIAL, /* 0x38 - LAlt */ |
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| 74 | ' ', |
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| 75 | SPECIAL, /* 0x3a - CapsLock */ |
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| 76 | SPECIAL, /* 0x3b - F1 */ |
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| 77 | SPECIAL, /* 0x3c - F2 */ |
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| 78 | SPECIAL, /* 0x3d - F3 */ |
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| 79 | SPECIAL, /* 0x3e - F4 */ |
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| 80 | SPECIAL, /* 0x3f - F5 */ |
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| 81 | SPECIAL, /* 0x40 - F6 */ |
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| 82 | SPECIAL, /* 0x41 - F7 */ |
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| 83 | SPECIAL, /* 0x42 - F8 */ |
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| 84 | SPECIAL, /* 0x43 - F9 */ |
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| 85 | SPECIAL, /* 0x44 - F10 */ |
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| 86 | SPECIAL, /* 0x45 - NumLock */ |
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| 87 | SPECIAL, /* 0x46 - ScrollLock */ |
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| 88 | '7', '8', '9', '-', |
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| 89 | '4', '5', '6', '+', |
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| 90 | '1', '2', '3', |
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| 91 | '0', '.', |
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| 92 | SPECIAL, /* 0x54 - Alt-SysRq */ |
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| 93 | SPECIAL, /* 0x55 - F11/F12/PF1/FN */ |
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| 94 | SPECIAL, /* 0x56 - unlabelled key next to LAlt */ |
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| 95 | SPECIAL, /* 0x57 - F11 */ |
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| 96 | SPECIAL, /* 0x58 - F12 */ |
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| 97 | SPECIAL, /* 0x59 */ |
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| 98 | SPECIAL, /* 0x5a */ |
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| 99 | SPECIAL, /* 0x5b */ |
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| 100 | SPECIAL, /* 0x5c */ |
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| 101 | SPECIAL, /* 0x5d */ |
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| 102 | SPECIAL, /* 0x5e */ |
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| 103 | SPECIAL, /* 0x5f */ |
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| 104 | SPECIAL, /* 0x60 */ |
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| 105 | SPECIAL, /* 0x61 */ |
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| 106 | SPECIAL, /* 0x62 */ |
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| 107 | SPECIAL, /* 0x63 */ |
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| 108 | SPECIAL, /* 0x64 */ |
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| 109 | SPECIAL, /* 0x65 */ |
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| 110 | SPECIAL, /* 0x66 */ |
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| 111 | SPECIAL, /* 0x67 */ |
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| 112 | SPECIAL, /* 0x68 */ |
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| 113 | SPECIAL, /* 0x69 */ |
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| 114 | SPECIAL, /* 0x6a */ |
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| 115 | SPECIAL, /* 0x6b */ |
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| 116 | SPECIAL, /* 0x6c */ |
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| 117 | SPECIAL, /* 0x6d */ |
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| 118 | SPECIAL, /* 0x6e */ |
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| 119 | SPECIAL, /* 0x6f */ |
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| 120 | SPECIAL, /* 0x70 */ |
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| 121 | SPECIAL, /* 0x71 */ |
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| 122 | SPECIAL, /* 0x72 */ |
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| 123 | SPECIAL, /* 0x73 */ |
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| 124 | SPECIAL, /* 0x74 */ |
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| 125 | SPECIAL, /* 0x75 */ |
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| 126 | SPECIAL, /* 0x76 */ |
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| 127 | SPECIAL, /* 0x77 */ |
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| 128 | SPECIAL, /* 0x78 */ |
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| 129 | SPECIAL, /* 0x79 */ |
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| 130 | SPECIAL, /* 0x7a */ |
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| 131 | SPECIAL, /* 0x7b */ |
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| 132 | SPECIAL, /* 0x7c */ |
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| 133 | SPECIAL, /* 0x7d */ |
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| 134 | SPECIAL, /* 0x7e */ |
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| 135 | SPECIAL, /* 0x7f */ |
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| 136 | }; |
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| 137 | |||
| 138 | /** Secondary meaning of scancodes. */ |
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| 139 | static char sc_secondary_map[] = { |
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| 140 | SPECIAL, /* 0x00 */ |
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| 141 | SPECIAL, /* 0x01 - Esc */ |
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| 142 | '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', |
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| 143 | SPECIAL, /* 0x0e - Backspace */ |
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| 144 | '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', |
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| 145 | SPECIAL, /* 0x1d - LCtrl */ |
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| 146 | 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', |
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| 147 | '~', |
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| 148 | SPECIAL, /* 0x2a - LShift */ |
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| 149 | '|', |
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| 150 | 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?', |
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| 151 | SPECIAL, /* 0x36 - RShift */ |
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| 152 | '*', |
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| 153 | SPECIAL, /* 0x38 - LAlt */ |
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| 154 | ' ', |
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| 155 | SPECIAL, /* 0x3a - CapsLock */ |
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| 156 | SPECIAL, /* 0x3b - F1 */ |
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| 157 | SPECIAL, /* 0x3c - F2 */ |
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| 158 | SPECIAL, /* 0x3d - F3 */ |
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| 159 | SPECIAL, /* 0x3e - F4 */ |
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| 160 | SPECIAL, /* 0x3f - F5 */ |
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| 161 | SPECIAL, /* 0x40 - F6 */ |
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| 162 | SPECIAL, /* 0x41 - F7 */ |
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| 163 | SPECIAL, /* 0x42 - F8 */ |
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| 164 | SPECIAL, /* 0x43 - F9 */ |
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| 165 | SPECIAL, /* 0x44 - F10 */ |
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| 166 | SPECIAL, /* 0x45 - NumLock */ |
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| 167 | SPECIAL, /* 0x46 - ScrollLock */ |
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| 168 | '7', '8', '9', '-', |
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| 169 | '4', '5', '6', '+', |
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| 170 | '1', '2', '3', |
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| 171 | '0', '.', |
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| 172 | SPECIAL, /* 0x54 - Alt-SysRq */ |
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| 173 | SPECIAL, /* 0x55 - F11/F12/PF1/FN */ |
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| 174 | SPECIAL, /* 0x56 - unlabelled key next to LAlt */ |
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| 175 | SPECIAL, /* 0x57 - F11 */ |
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| 176 | SPECIAL, /* 0x58 - F12 */ |
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| 177 | SPECIAL, /* 0x59 */ |
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| 178 | SPECIAL, /* 0x5a */ |
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| 179 | SPECIAL, /* 0x5b */ |
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| 180 | SPECIAL, /* 0x5c */ |
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| 181 | SPECIAL, /* 0x5d */ |
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| 182 | SPECIAL, /* 0x5e */ |
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| 183 | SPECIAL, /* 0x5f */ |
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| 184 | SPECIAL, /* 0x60 */ |
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| 185 | SPECIAL, /* 0x61 */ |
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| 186 | SPECIAL, /* 0x62 */ |
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| 187 | SPECIAL, /* 0x63 */ |
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| 188 | SPECIAL, /* 0x64 */ |
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| 189 | SPECIAL, /* 0x65 */ |
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| 190 | SPECIAL, /* 0x66 */ |
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| 191 | SPECIAL, /* 0x67 */ |
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| 192 | SPECIAL, /* 0x68 */ |
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| 193 | SPECIAL, /* 0x69 */ |
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| 194 | SPECIAL, /* 0x6a */ |
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| 195 | SPECIAL, /* 0x6b */ |
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| 196 | SPECIAL, /* 0x6c */ |
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| 197 | SPECIAL, /* 0x6d */ |
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| 198 | SPECIAL, /* 0x6e */ |
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| 199 | SPECIAL, /* 0x6f */ |
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| 200 | SPECIAL, /* 0x70 */ |
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| 201 | SPECIAL, /* 0x71 */ |
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| 202 | SPECIAL, /* 0x72 */ |
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| 203 | SPECIAL, /* 0x73 */ |
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| 204 | SPECIAL, /* 0x74 */ |
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| 205 | SPECIAL, /* 0x75 */ |
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| 206 | SPECIAL, /* 0x76 */ |
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| 207 | SPECIAL, /* 0x77 */ |
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| 208 | SPECIAL, /* 0x78 */ |
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| 209 | SPECIAL, /* 0x79 */ |
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| 210 | SPECIAL, /* 0x7a */ |
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| 211 | SPECIAL, /* 0x7b */ |
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| 212 | SPECIAL, /* 0x7c */ |
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| 213 | SPECIAL, /* 0x7d */ |
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| 214 | SPECIAL, /* 0x7e */ |
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| 215 | SPECIAL, /* 0x7f */ |
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| 216 | }; |
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| 217 | |||
| 218 | /** Initialize i8042. */ |
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| 1 | jermar | 219 | void i8042_init(void) |
| 220 | { |
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| 221 | trap_register(VECTOR_KBD, i8042_interrupt); |
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| 508 | jermar | 222 | spinlock_initialize(&keylock); |
| 1 | jermar | 223 | } |
| 224 | |||
| 508 | jermar | 225 | /** Process i8042 interrupt. |
| 226 | * |
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| 227 | * @param n Interrupt vector. |
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| 228 | * @param stack Interrupted stack. |
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| 229 | */ |
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| 206 | palkovsky | 230 | void i8042_interrupt(__u8 n, __native stack[]) |
| 1 | jermar | 231 | { |
| 232 | __u8 x; |
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| 233 | |||
| 234 | trap_virtual_eoi(); |
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| 235 | x = inb(0x60); |
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| 508 | jermar | 236 | if (x & KEY_RELEASE) |
| 237 | key_released(x ^ KEY_RELEASE); |
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| 238 | else |
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| 239 | key_pressed(x); |
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| 1 | jermar | 240 | } |
| 508 | jermar | 241 | |
| 242 | /** Process release of key. |
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| 243 | * |
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| 244 | * @param sc Scancode of the key being released. |
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| 245 | */ |
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| 246 | void key_released(__u8 sc) |
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| 247 | { |
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| 248 | spinlock_lock(&keylock); |
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| 249 | switch (sc) { |
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| 250 | case SC_LSHIFT: |
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| 251 | case SC_RSHIFT: |
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| 252 | keyflags &= ~PRESSED_SHIFT; |
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| 253 | break; |
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| 254 | case SC_CAPSLOCK: |
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| 255 | keyflags &= ~PRESSED_CAPSLOCK; |
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| 256 | if (lockflags & LOCKED_CAPSLOCK) |
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| 257 | lockflags &= ~LOCKED_CAPSLOCK; |
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| 258 | else |
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| 259 | lockflags |= LOCKED_CAPSLOCK; |
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| 260 | break; |
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| 261 | default: |
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| 262 | break; |
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| 263 | } |
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| 264 | spinlock_unlock(&keylock); |
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| 265 | } |
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| 266 | |||
| 267 | /** Process keypress. |
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| 268 | * |
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| 269 | * @param sc Scancode of the key being pressed. |
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| 270 | */ |
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| 271 | void key_pressed(__u8 sc) |
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| 272 | { |
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| 273 | char *map = sc_primary_map; |
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| 274 | char ascii = sc_primary_map[sc]; |
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| 275 | bool shift, capslock; |
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| 276 | bool letter = false; |
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| 277 | |||
| 278 | spinlock_lock(&keylock); |
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| 279 | switch (sc) { |
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| 280 | case SC_LSHIFT: |
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| 281 | case SC_RSHIFT: |
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| 282 | keyflags |= PRESSED_SHIFT; |
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| 283 | break; |
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| 284 | case SC_CAPSLOCK: |
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| 285 | keyflags |= PRESSED_CAPSLOCK; |
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| 286 | break; |
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| 287 | default: |
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| 288 | letter = (ascii >= 'a') && (ascii <= 'z'); |
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| 289 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
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| 290 | shift = keyflags & PRESSED_SHIFT; |
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| 291 | if (letter && capslock) |
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| 292 | shift = !shift; |
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| 293 | if (shift) |
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| 294 | map = sc_secondary_map; |
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| 295 | putchar(map[sc]); |
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| 296 | break; |
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| 297 | } |
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| 298 | spinlock_unlock(&keylock); |
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| 299 | } |