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1 jermar 1 
/*
4042 jermar 2 
 * Copyright (c) 2009 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup genarch
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 * @{
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 */
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/**
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 * @file
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 * @brief Keyboard processing.
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 */
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#include <genarch/kbrd/kbrd.h>
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#include <genarch/kbrd/scanc.h>
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#ifdef CONFIG_PC_KBD
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#include <genarch/kbrd/scanc_pc.h>
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#endif
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#ifdef CONFIG_SUN_KBD
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#include <genarch/kbrd/scanc_sun.h>
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#endif
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#include <synch/spinlock.h>
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#include <console/chardev.h>
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#include <console/console.h>
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#include <proc/thread.h>
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#include <arch.h>
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#include <macros.h>
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#define IGNORE_CODE  0x7f
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#define KEY_RELEASE  0x80
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#define PRESSED_SHIFT     (1 << 0)
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#define PRESSED_CAPSLOCK  (1 << 1)
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#define LOCKED_CAPSLOCK   (1 << 0)
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static indev_operations_t kbrd_raw_ops = {
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    .poll = NULL
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};
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/** Process release of key.
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 *
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 * @param sc Scancode of the key being released.
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 */
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static void key_released(kbrd_instance_t *instance, wchar_t sc)
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{
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    spinlock_lock(&instance->keylock);
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    switch (sc) {
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    case SC_LSHIFT:
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    case SC_RSHIFT:
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        instance->keyflags &= ~PRESSED_SHIFT;
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        break;
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    case SC_CAPSLOCK:
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        instance->keyflags &= ~PRESSED_CAPSLOCK;
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        if (instance->lockflags & LOCKED_CAPSLOCK)
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            instance->lockflags &= ~LOCKED_CAPSLOCK;
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        else
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            instance->lockflags |= LOCKED_CAPSLOCK;
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        break;
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    default:
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        break;
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    }
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    spinlock_unlock(&instance->keylock);
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}
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/** Process keypress.
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 *
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 * @param sc Scancode of the key being pressed.
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 */
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static void key_pressed(kbrd_instance_t *instance, wchar_t sc)
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{
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    bool letter;
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    bool shift;
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    bool capslock;
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    spinlock_lock(&instance->keylock);
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    switch (sc) {
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    case SC_LSHIFT:
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    case SC_RSHIFT:
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        instance->keyflags |= PRESSED_SHIFT;
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        break;
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    case SC_CAPSLOCK:
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        instance->keyflags |= PRESSED_CAPSLOCK;
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        break;
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    case SC_SCAN_ESCAPE:
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        break;
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    default:
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        letter = islower(sc_primary_map[sc]);
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        shift = instance->keyflags & PRESSED_SHIFT;
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        capslock = (instance->keyflags & PRESSED_CAPSLOCK) ||
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            (instance->lockflags & LOCKED_CAPSLOCK);
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        if ((letter) && (capslock))
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            shift = !shift;
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        if (shift)
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            indev_push_character(instance->sink, sc_secondary_map[sc]);
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        else
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            indev_push_character(instance->sink, sc_primary_map[sc]);
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        break;
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    }
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    spinlock_unlock(&instance->keylock);
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}
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static void kkbrd(void *arg)
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{
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    kbrd_instance_t *instance = (kbrd_instance_t *) arg;
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    while (true) {
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        wchar_t sc = indev_pop_character(&instance->raw);
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        if (sc == IGNORE_CODE)
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            continue;
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        if (sc & KEY_RELEASE)
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            key_released(instance, (sc ^ KEY_RELEASE) & 0x7f);
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        else
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            key_pressed(instance, sc & 0x7f);
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    }
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}
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kbrd_instance_t *kbrd_init(void)
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{
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    kbrd_instance_t *instance
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        = malloc(sizeof(kbrd_instance_t), FRAME_ATOMIC);
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    if (instance) {
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        instance->thread
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            = thread_create(kkbrd, (void *) instance, TASK, 0, "kkbrd", false);
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        if (!instance->thread) {
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            free(instance);
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            return NULL;
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        }
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        instance->sink = NULL;
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        indev_initialize("kbrd", &instance->raw, &kbrd_raw_ops);
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        spinlock_initialize(&instance->keylock, "instance_keylock");
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        instance->keyflags = 0;
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        instance->lockflags = 0;
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    }
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    return instance;
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}
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indev_t *kbrd_wire(kbrd_instance_t *instance, indev_t *sink)
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{
177 
    ASSERT(instance);
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    ASSERT(sink);
179 
 
180 
    instance->sink = sink;
181 
    thread_ready(instance->thread);
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183 
    return &instance->raw;
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}
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1754 jermar 186 
/** @}
1702 cejka 187 
 */