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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>

enum dec_state {

    ds_s,

    ds_e

};

static enum dec_state ds = ds_s;

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

};

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);

}

/**

 * @}

 */