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/*
 * Copyright (c) 2009 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup kbd_ctl
 * @ingroup kbd
 * @{
 */
/**
 * @file
 * @brief   PC keyboard controller driver.
 */

#include <kbd.h>
#include <kbd/kbd.h>
#include <kbd/keycode.h>
#include <kbd_ctl.h>
#include <gsp.h>

enum dec_state {
    ds_s,
    ds_e
};

static enum dec_state ds;

static int scanmap_simple[] = {

    [0x29] = KC_BACKTICK,

    [0x02] = KC_1,
    [0x03] = KC_2,
    [0x04] = KC_3,
    [0x05] = KC_4,
    [0x06] = KC_5,
    [0x07] = KC_6,
    [0x08] = KC_7,
    [0x09] = KC_8,
    [0x0a] = KC_9,
    [0x0b] = KC_0,

    [0x0c] = KC_MINUS,
    [0x0d] = KC_EQUALS,
    [0x0e] = KC_BACKSPACE,

    [0x0f] = KC_TAB,

    [0x10] = KC_Q,
    [0x11] = KC_W,
    [0x12] = KC_E,
    [0x13] = KC_R,
    [0x14] = KC_T,
    [0x15] = KC_Y,
    [0x16] = KC_U,
    [0x17] = KC_I,
    [0x18] = KC_O,
    [0x19] = KC_P,

    [0x1a] = KC_LBRACKET,
    [0x1b] = KC_RBRACKET,

    [0x3a] = KC_CAPS_LOCK,

    [0x1e] = KC_A,
    [0x1f] = KC_S,
    [0x20] = KC_D,
    [0x21] = KC_F,
    [0x22] = KC_G,
    [0x23] = KC_H,
    [0x24] = KC_J,
    [0x25] = KC_K,
    [0x26] = KC_L,

    [0x27] = KC_SEMICOLON,
    [0x28] = KC_QUOTE,
    [0x2b] = KC_BACKSLASH,

    [0x2a] = KC_LSHIFT,

    [0x2c] = KC_Z,
    [0x2d] = KC_X,
    [0x2e] = KC_C,
    [0x2f] = KC_V,
    [0x30] = KC_B,
    [0x31] = KC_N,
    [0x32] = KC_M,

    [0x33] = KC_COMMA,
    [0x34] = KC_PERIOD,
    [0x35] = KC_SLASH,

    [0x36] = KC_RSHIFT,

    [0x1d] = KC_LCTRL,
    [0x38] = KC_LALT,
    [0x39] = KC_SPACE,

    [0x01] = KC_ESCAPE,

    [0x3b] = KC_F1,
    [0x3c] = KC_F2,
    [0x3d] = KC_F3,
    [0x3e] = KC_F4,
    [0x3f] = KC_F5,
    [0x40] = KC_F6,
    [0x41] = KC_F7,

    [0x42] = KC_F8,
    [0x43] = KC_F9,
    [0x44] = KC_F10,

    [0x57] = KC_F11,
    [0x58] = KC_F12,

    [0x46] = KC_SCROLL_LOCK,

    [0x1c] = KC_ENTER,

    [0x45] = KC_NUM_LOCK,
    [0x37] = KC_NTIMES,
    [0x4a] = KC_NMINUS,
    [0x4e] = KC_NPLUS,
    [0x47] = KC_N7,
    [0x48] = KC_N8,
    [0x49] = KC_N9,
    [0x4b] = KC_N4,
    [0x4c] = KC_N5,
    [0x4d] = KC_N6,
    [0x4f] = KC_N1,
    [0x50] = KC_N2,
    [0x51] = KC_N3,
    [0x52] = KC_N0,
    [0x53] = KC_NPERIOD
};

static int scanmap_e0[] = {
    [0x38] = KC_RALT,
    [0x1d] = KC_RSHIFT,

    [0x37] = KC_PRTSCR,

    [0x52] = KC_INSERT,
    [0x47] = KC_HOME,
    [0x49] = KC_PAGE_UP,

    [0x53] = KC_DELETE,
    [0x4f] = KC_END,
    [0x51] = KC_PAGE_DOWN,

    [0x48] = KC_UP,
    [0x4b] = KC_LEFT,
    [0x50] = KC_DOWN,
    [0x4d] = KC_RIGHT,

    [0x35] = KC_NSLASH,
    [0x1c] = KC_NENTER
};

int kbd_ctl_init(void)
{
    ds = ds_s;
    return 0;
}

void kbd_ctl_parse_scancode(int scancode)
{
    kbd_ev_type_t type;
    unsigned int key;
    int *map;
    size_t map_length;

    if (scancode == 0xe0) {
        ds = ds_e;
        return;
    }

    switch (ds) {
    case ds_s:
        map = scanmap_simple;
        map_length = sizeof(scanmap_simple) / sizeof(int);
        break;
    case ds_e:
        map = scanmap_e0;
        map_length = sizeof(scanmap_e0) / sizeof(int);
        break;
    }

    ds = ds_s;

    if (scancode & 0x80) {
        scancode &= ~0x80;
        type = KE_RELEASE;
    } else {
        type = KE_PRESS;
    }

    if (scancode < 0 || scancode >= map_length)
        return;

    key = map[scancode];
    if (key != 0)
        kbd_push_ev(type, key);
}

/**
 * @}
 */