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| 4651 | pillai | 1 | /* |
| 2 | * Copyright (c) 2009 Vineeth Pillai |
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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 | /** @addtogroup 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 pl050 Keyboard processing. |
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| 35 | */ |
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| 36 | |||
| 37 | #include <genarch/kbrd/kbrd.h> |
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| 38 | #include <genarch/kbrd/scanc.h> |
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| 39 | |||
| 40 | #include <genarch/kbrd/scanc_pl050.h> |
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| 41 | |||
| 42 | #include <synch/spinlock.h> |
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| 43 | #include <console/chardev.h> |
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| 44 | #include <console/console.h> |
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| 45 | #include <proc/thread.h> |
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| 46 | #include <arch.h> |
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| 47 | #include <macros.h> |
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| 48 | |||
| 49 | #define PRESSED_SHIFT (1 << 0) |
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| 50 | #define PRESSED_CAPSLOCK (1 << 1) |
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| 51 | #define LOCKED_CAPSLOCK (1 << 0) |
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| 52 | |||
| 53 | #define PL050_KEY_RELEASE 0xF0 |
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| 54 | #define PL050_ESC_KEY 0xE0 |
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| 55 | #define PL050_CAPS_SCAN_CODE 0x58 |
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| 56 | #define PL050_NUM_SCAN_CODE 0x77 |
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| 57 | #define PL050_SCROLL_SCAN_CODE 0x7E |
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| 58 | |||
| 59 | static bool is_lock_key(wchar_t); |
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| 60 | |||
| 61 | static indev_operations_t kbrd_raw_ops = { |
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| 62 | .poll = NULL |
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| 63 | }; |
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| 64 | |||
| 65 | /** Process release of key. |
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| 66 | * |
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| 67 | * @param sc Scancode of the key being released. |
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| 68 | */ |
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| 69 | static void key_released(kbrd_instance_t *instance, wchar_t sc) |
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| 70 | { |
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| 71 | spinlock_lock(&instance->keylock); |
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| 72 | |||
| 73 | switch (sc) { |
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| 74 | case SC_LSHIFT: |
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| 75 | case SC_RSHIFT: |
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| 76 | instance->keyflags &= ~PRESSED_SHIFT; |
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| 77 | break; |
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| 78 | case SC_CAPSLOCK: |
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| 79 | instance->keyflags &= ~PRESSED_CAPSLOCK; |
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| 80 | if (instance->lockflags & LOCKED_CAPSLOCK) |
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| 81 | instance->lockflags &= ~LOCKED_CAPSLOCK; |
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| 82 | else |
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| 83 | instance->lockflags |= LOCKED_CAPSLOCK; |
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| 84 | break; |
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| 85 | default: |
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| 86 | break; |
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| 87 | } |
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| 88 | |||
| 89 | spinlock_unlock(&instance->keylock); |
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| 90 | } |
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| 91 | |||
| 92 | /** Process keypress. |
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| 93 | * |
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| 94 | * @param sc Scancode of the key being pressed. |
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| 95 | */ |
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| 96 | static void key_pressed(kbrd_instance_t *instance, wchar_t sc) |
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| 97 | { |
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| 98 | bool letter; |
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| 99 | bool shift; |
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| 100 | bool capslock; |
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| 101 | |||
| 102 | spinlock_lock(&instance->keylock); |
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| 103 | |||
| 104 | switch (sc) { |
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| 105 | case SC_LSHIFT: |
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| 106 | case SC_RSHIFT: |
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| 107 | instance->keyflags |= PRESSED_SHIFT; |
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| 108 | break; |
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| 109 | case SC_CAPSLOCK: |
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| 110 | instance->keyflags |= PRESSED_CAPSLOCK; |
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| 111 | break; |
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| 112 | case SC_SCAN_ESCAPE: |
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| 113 | break; |
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| 114 | default: |
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| 115 | letter = islower(sc_primary_map[sc]); |
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| 116 | shift = instance->keyflags & PRESSED_SHIFT; |
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| 117 | capslock = (instance->keyflags & PRESSED_CAPSLOCK) || |
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| 118 | (instance->lockflags & LOCKED_CAPSLOCK); |
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| 119 | |||
| 120 | if ((letter) && (capslock)) |
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| 121 | shift = !shift; |
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| 122 | |||
| 123 | if (shift) |
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| 124 | indev_push_character(instance->sink, sc_secondary_map[sc]); |
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| 125 | else |
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| 126 | indev_push_character(instance->sink, sc_primary_map[sc]); |
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| 127 | break; |
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| 128 | } |
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| 129 | |||
| 130 | spinlock_unlock(&instance->keylock); |
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| 131 | } |
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| 132 | |||
| 133 | static void kkbrd(void *arg) |
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| 134 | { |
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| 135 | static int key_released_flag = 0; |
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| 136 | static int is_locked = 0; |
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| 137 | kbrd_instance_t *instance = (kbrd_instance_t *) arg; |
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| 138 | |||
| 139 | while (true) { |
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| 140 | wchar_t sc = indev_pop_character(&instance->raw); |
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| 141 | |||
| 142 | if (sc == PL050_KEY_RELEASE) { |
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| 143 | key_released_flag = 1; |
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| 144 | } else { |
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| 145 | if (key_released_flag) { |
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| 146 | key_released_flag = 0; |
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| 147 | if (is_lock_key(sc)) { |
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| 148 | if (!is_locked) { |
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| 149 | is_locked = 1; |
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| 150 | } else { |
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| 151 | is_locked = 0; |
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| 152 | continue; |
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| 153 | } |
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| 154 | } |
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| 155 | key_released(instance, sc); |
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| 156 | |||
| 157 | } else { |
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| 158 | if (is_lock_key(sc) && is_locked) |
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| 159 | continue; |
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| 160 | key_pressed(instance, sc); |
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| 161 | } |
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| 162 | } |
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| 163 | |||
| 164 | } |
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| 165 | } |
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| 166 | |||
| 167 | kbrd_instance_t *kbrd_init(void) |
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| 168 | { |
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| 169 | kbrd_instance_t *instance |
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| 170 | = malloc(sizeof(kbrd_instance_t), FRAME_ATOMIC); |
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| 171 | if (instance) { |
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| 172 | instance->thread |
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| 173 | = thread_create(kkbrd, (void *) instance, TASK, 0, "kkbrd", false); |
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| 174 | |||
| 175 | if (!instance->thread) { |
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| 176 | free(instance); |
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| 177 | return NULL; |
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| 178 | } |
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| 179 | |||
| 180 | instance->sink = NULL; |
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| 181 | indev_initialize("kbrd", &instance->raw, &kbrd_raw_ops); |
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| 182 | |||
| 183 | spinlock_initialize(&instance->keylock, "instance_keylock"); |
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| 184 | instance->keyflags = 0; |
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| 185 | instance->lockflags = 0; |
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| 186 | } |
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| 187 | |||
| 188 | return instance; |
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| 189 | } |
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| 190 | |||
| 191 | indev_t *kbrd_wire(kbrd_instance_t *instance, indev_t *sink) |
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| 192 | { |
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| 193 | ASSERT(instance); |
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| 194 | ASSERT(sink); |
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| 195 | |||
| 196 | instance->sink = sink; |
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| 197 | thread_ready(instance->thread); |
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| 198 | |||
| 199 | return &instance->raw; |
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| 200 | } |
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| 201 | |||
| 202 | static bool is_lock_key(wchar_t sc) |
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| 203 | { |
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| 204 | return ((sc == PL050_CAPS_SCAN_CODE) || (sc == PL050_NUM_SCAN_CODE) || |
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| 205 | (sc == PL050_SCROLL_SCAN_CODE)); |
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| 206 | } |
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| 207 | |||
| 208 | /** @} |
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| 209 | */ |