pc.c

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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.
 */

#include <kbd.h>
#include <io/console.h>
#include <io/keycode.h>
#include <kbd_ctl.h>
#include <kbd_port.h>
#include <gsp.h>

enum dec_state {
        ds_s,
        ds_e
};

enum special_code {
        SC_ACK = 0xfa,
        SC_NAK = 0xfe
};

enum lock_ind_bits {
        LI_SCROLL       = 0x01,
        LI_NUM          = 0x02,
        LI_CAPS         = 0x04
};

enum kbd_command {
        KBD_CMD_SET_LEDS = 0xed
};

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)
{
        console_ev_type_t type;
        unsigned int key;
        int *map;
        size_t map_length;

        /*
         * ACK/NAK are returned as response to us sending a command.
         * We are not interested in them.
         */
        if (scancode == SC_ACK || scancode == SC_NAK)
                return;

        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;
        default:
                map = NULL;
                map_length = 0;
        }

        ds = ds_s;

        if (scancode & 0x80) {
                scancode &= ~0x80;
                type = KEY_RELEASE;
        } else {
                type = KEY_PRESS;
        }

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

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

void kbd_ctl_set_ind(unsigned mods)
{
        uint8_t b;

        b = 0;
        if ((mods & KM_CAPS_LOCK) != 0)
                b = b | LI_CAPS;
        if ((mods & KM_NUM_LOCK) != 0)
                b = b | LI_NUM;
        if ((mods & KM_SCROLL_LOCK) != 0)
                b = b | LI_SCROLL;

        kbd_port_write(KBD_CMD_SET_LEDS);
        kbd_port_write(b);
}

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