1 | /*
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2 | * Copyright (c) 2009 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 |
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29 | /** @addtogroup kernel_genarch
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30 | * @{
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31 | */
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32 | /**
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33 | * @file
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34 | * @brief Keyboard processing.
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35 | */
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36 |
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37 | #include <assert.h>
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38 | #include <genarch/kbrd/kbrd.h>
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39 | #include <genarch/kbrd/scanc.h>
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40 |
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41 | #ifdef CONFIG_PC_KBD
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42 | #include <genarch/kbrd/scanc_pc.h>
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43 | #endif
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44 |
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45 | #ifdef CONFIG_SUN_KBD
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46 | #include <genarch/kbrd/scanc_sun.h>
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47 | #endif
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48 |
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49 | #ifdef CONFIG_MAC_KBD
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50 | #include <genarch/kbrd/scanc_mac.h>
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51 | #endif
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52 |
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53 | #include <synch/spinlock.h>
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54 | #include <console/chardev.h>
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55 | #include <console/console.h>
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56 | #include <proc/thread.h>
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57 | #include <arch.h>
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58 | #include <macros.h>
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59 | #include <str.h>
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60 | #include <stdlib.h>
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61 |
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62 | #define IGNORE_CODE 0x7f
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63 | #define KEY_RELEASE 0x80
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64 |
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65 | #define PRESSED_SHIFT (1 << 0)
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66 | #define PRESSED_CAPSLOCK (1 << 1)
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67 | #define LOCKED_CAPSLOCK (1 << 0)
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68 |
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69 | static indev_operations_t kbrd_raw_ops = {
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70 | .poll = NULL,
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71 | .signal = NULL
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72 | };
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73 |
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74 | /** Process release of key.
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75 | *
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76 | * @param sc Scancode of the key being released.
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77 | */
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78 | static void key_released(kbrd_instance_t *instance, char32_t sc)
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79 | {
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80 | spinlock_lock(&instance->keylock);
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81 |
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82 | switch (sc) {
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83 | case SC_LSHIFT:
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84 | case SC_RSHIFT:
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85 | instance->keyflags &= ~PRESSED_SHIFT;
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86 | break;
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87 | case SC_CAPSLOCK:
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88 | instance->keyflags &= ~PRESSED_CAPSLOCK;
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89 | if (instance->lockflags & LOCKED_CAPSLOCK)
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90 | instance->lockflags &= ~LOCKED_CAPSLOCK;
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91 | else
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92 | instance->lockflags |= LOCKED_CAPSLOCK;
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93 | break;
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94 | default:
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95 | break;
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96 | }
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97 |
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98 | spinlock_unlock(&instance->keylock);
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99 | }
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100 |
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101 | /** Process keypress.
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102 | *
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103 | * @param sc Scancode of the key being pressed.
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104 | */
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105 | static void key_pressed(kbrd_instance_t *instance, char32_t sc)
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106 | {
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107 | bool letter;
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108 | bool shift;
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109 | bool capslock;
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110 | char32_t ch;
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111 |
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112 | spinlock_lock(&instance->keylock);
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113 |
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114 | switch (sc) {
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115 | case SC_LSHIFT:
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116 | case SC_RSHIFT:
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117 | instance->keyflags |= PRESSED_SHIFT;
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118 | break;
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119 | case SC_CAPSLOCK:
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120 | instance->keyflags |= PRESSED_CAPSLOCK;
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121 | break;
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122 | case SC_SCAN_ESCAPE:
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123 | break;
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124 | default:
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125 | letter = islower(sc_primary_map[sc]);
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126 | shift = instance->keyflags & PRESSED_SHIFT;
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127 | capslock = (instance->keyflags & PRESSED_CAPSLOCK) ||
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128 | (instance->lockflags & LOCKED_CAPSLOCK);
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129 |
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130 | if ((letter) && (capslock))
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131 | shift = !shift;
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132 |
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133 | if (shift)
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134 | ch = sc_secondary_map[sc];
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135 | else
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136 | ch = sc_primary_map[sc];
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137 |
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138 | switch (ch) {
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139 | case U_PAGE_UP:
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140 | indev_signal(instance->sink, INDEV_SIGNAL_SCROLL_UP);
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141 | break;
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142 | case U_PAGE_DOWN:
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143 | indev_signal(instance->sink, INDEV_SIGNAL_SCROLL_DOWN);
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144 | break;
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145 | default:
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146 | indev_push_character(instance->sink, ch);
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147 | }
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148 |
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149 | break;
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150 | }
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151 |
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152 | spinlock_unlock(&instance->keylock);
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153 | }
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154 |
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155 | static void kkbrd(void *arg)
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156 | {
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157 | kbrd_instance_t *instance = (kbrd_instance_t *) arg;
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158 |
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159 | while (true) {
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160 | char32_t sc = indev_pop_character(&instance->raw);
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161 |
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162 | if (sc == IGNORE_CODE)
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163 | continue;
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164 |
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165 | if (sc & KEY_RELEASE)
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166 | key_released(instance, (sc ^ KEY_RELEASE) & 0x7f);
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167 | else
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168 | key_pressed(instance, sc & 0x7f);
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169 | }
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170 | }
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171 |
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172 | kbrd_instance_t *kbrd_init(void)
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173 | {
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174 | kbrd_instance_t *instance =
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175 | malloc(sizeof(kbrd_instance_t));
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176 | if (instance) {
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177 | instance->thread = thread_create(kkbrd, (void *) instance,
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178 | TASK, THREAD_FLAG_NONE, "kkbrd");
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179 |
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180 | if (!instance->thread) {
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181 | free(instance);
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182 | return NULL;
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183 | }
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184 |
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185 | instance->sink = NULL;
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186 | indev_initialize("kbrd", &instance->raw, &kbrd_raw_ops);
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187 |
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188 | spinlock_initialize(&instance->keylock, "kbrd.instance.keylock");
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189 | instance->keyflags = 0;
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190 | instance->lockflags = 0;
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191 | }
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192 |
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193 | return instance;
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194 | }
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195 |
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196 | indev_t *kbrd_wire(kbrd_instance_t *instance, indev_t *sink)
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197 | {
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198 | assert(instance);
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199 | assert(sink);
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200 |
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201 | instance->sink = sink;
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202 | thread_start(instance->thread);
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203 |
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204 | return &instance->raw;
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205 | }
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206 |
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207 | /** @}
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208 | */
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