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/*
* <pckbd.c>
*
* Open Hack'Ware BIOS PC keyboard driver.
*
* Copyright (c) 2005 Jocelyn Mayer
*
* This code is a rework (mostly simplification) from code
* proposed by Matthew Wood <mwood@realmsys.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License V2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include "bios.h"
/* IO definitions */
#define PCKBD_IO_BASE 0x60
#define PCKBD_COMMAND_OFFSET 0x4
#define PCKBD_STATUS_OFFSET 0x4
/* Indexes for keyboard state */
#define SHIFT 0x1
#define CTRL 0x2
#define ALT 0x4
/* Scan codes */
#define L_SHIFT 0x2a
#define R_SHIFT 0x36
#define L_CTRL 0x1d
/* XXX: R_CTRL ? */
#define L_ALT 0x38
/* XXX: missing capslock */
/* XXX: TODO: add keypad/numlock ... (pc105 kbd) */
typedef struct kbdmap_t kbdmap_t;
struct kbdmap_t {
char translate[8];
};
typedef struct pckbd_t pckbd_t;
struct pckbd_t {
int modifiers;
kbdmap_t *map;
int maplen;
int io_base;
};
/* XXX: should not be here cause it's locale dependent */
static kbdmap_t pc_map_us[] = {
/* 0x00 */
{ { -1, -1, -1, -1, -1, -1, -1, -1, }, },
{ { 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, }, },
{ { '1', '!', -1, -1, '1', '!', -1, -1, }, },
{ { '2', '\'', '\'', -1, -1, '2', '\'', '\'', }, },
{ { '3', '#', -1, -1, '3', '#', -1, -1, }, },
{ { '4', '$', -1, -1, '4', '$', -1, -1, }, },
{ { '5', '%', -1, -1, '5', '%', -1, -1, }, },
{ { '6', '^', -1, -1, '6', '^', -1, -1, }, },
/* 0x08 */
{ { '7', '&', -1, -1, '7', '&', -1, -1, }, },
{ { '8', '*', -1, -1, '8', '*', -1, -1, }, },
{ { '9', '(', -1, -1, '9', '(', -1, -1, }, },
{ { '0', ')', -1, -1, '0', ')', -1, -1, }, },
{ { '-', '_', -1, -1, '-', '_', -1, -1, }, },
{ { '=', '+', -1, -1, '=', '+', -1, -1, }, },
{ { 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, }, },
{ { 0x2a, -1, -1, -1, 0x2a, -1, -1, -1, }, },
/* 0x10 */
{ { 'q', 'Q', -1, -1, 'q', 'Q', -1, -1, }, },
{ { 'w', 'W', -1, -1, 'w', 'W', -1, -1, }, },
{ { 'e', 'E', -1, -1, 'e', 'E', -1, -1, }, },
{ { 'r', 'R', -1, -1, 'r', 'R', -1, -1, }, },
{ { 't', 'T', -1, -1, 't', 'T', -1, -1, }, },
{ { 'y', 'Y', -1, -1, 'y', 'Y', -1, -1, }, },
{ { 'u', 'U', -1, -1, 'u', 'U', -1, -1, }, },
{ { 'i', 'I', -1, -1, 'i', 'I', -1, -1, }, },
/* 0x18 */
{ { 'o', 'O', -1, -1, 'o', 'O', -1, -1, }, },
{ { 'p', 'P', -1, -1, 'p', 'P', -1, -1, }, },
{ { '[', '{', 0x1b, 0x1b, '[', '{', 0x1b, 0x1b, }, },
{ { ']', '}', -1, -1, ']', '}', -1, -1, }, },
{ { 0x0d, 0x0d, '\r', '\r', 0x0d, 0x0d, '\r', '\r', }, },
{ { -1, -1, -1, -1, -1, -1, -1, -1, }, },
{ { 'a', 'A', -1, -1, 'a', 'A', -1, -1, }, },
{ { 's', 'S', -1, -1, 's', 'S', -1, -1, }, },
/* 0x20 */
{ { 'd', 'D', -1, -1, 'd', 'D', -1, -1, }, },
{ { 'f', 'F', -1, -1, 'f', 'F', -1, -1, }, },
{ { 'g', 'G', 0x07, 0x07, 'g', 'G', 0x07, 0x07, }, },
{ { 'h', 'H', 0x08, 0x08, 'h', 'H', 0x08, 0x08, }, },
{ { 'j', 'J', '\r', '\r', 'j', 'J', '\r', '\r', }, },
{ { 'k', 'K', -1, -1, 'k', 'K', -1, -1, }, },
{ { 'l', 'L', -1, -1, 'l', 'L', -1, -1, }, },
{ { ';', ':', -1, -1, ';', ':', -1, -1, }, },
/* 0x28 */
{ { '\'', '"', -1, -1, '\'', '"', -1, -1, }, },
{ { '`', '~', -1, -1, '`', '~', -1, -1, }, },
{ { 0x02, -1, -1, -1, -1, -1, -1, -1, }, },
{ { '\\', '|', -1, -1, '\\', '|', -1, -1, }, },
{ { 'z', 'Z', -1, -1, 'z', 'Z', -1, -1, }, },
{ { 'x', 'X', -1, -1, 'x', 'X', -1, -1, }, },
{ { 'c', 'C', -1, -1, 'c', 'C', -1, -1, }, },
{ { 'v', 'V', 0x16, 0x16, 'v', 'V', -1, -1, }, },
/* 0x30 */
{ { 'b', 'B', -1, -1, 'b', 'B', -1, -1, }, },
{ { 'n', 'N', -1, -1, 'n', 'N', -1, -1, }, },
{ { 'm', 'M', 0x0d, 0x0d, 'm', 'M', 0x0d, 0x0d, }, },
{ { ',', '<', -1, -1, ',', '<', -1, -1, }, },
{ { '.', '>', -1, -1, '.', '>', -1, -1, }, },
{ { '/', '?', -1, -1, '/', '?', -1, -1, }, },
{ { -1, -1, -1, -1, -1, -1, -1, -1, }, },
{ { '*', '*', -1, -1, '*', '*', -1, -1, }, },
/* 0x38 */
{ { -1, -1, -1, -1, -1, -1, -1, -1, }, },
{ { ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', }, },
};
static int pckbd_open (unused void *private)
{
return 0;
}
static int pckbd_close (unused void *private)
{
return 0;
}
static int pckbd_readb (void *private)
{
pckbd_t *kbd = private;
int status, key, up, mod;
int ret;
for (ret = -1; ret < 0; ) {
status = inb(kbd->io_base + PCKBD_STATUS_OFFSET);
if (!(status & 1)) {
/* No more data available */
break;
}
key = inb(kbd->io_base);
up = (key & 0x80) != 0;
key &= ~0x80;
switch (key) {
case 0:
break;
case L_ALT:
mod = ALT;
goto set_modifiers;
case L_SHIFT:
case R_SHIFT:
mod = SHIFT;
goto set_modifiers;
case L_CTRL:
#if 0 /* XXX: missing definition */
case R_CTRL:
#endif
mod = CTRL;
set_modifiers:
if (up)
kbd->modifiers &= ~mod;
else
kbd->modifiers |= mod;
break;
default:
/* We don't care about up events or unknown keys */
if (!up && key < kbd->maplen)
ret = kbd->map[key].translate[kbd->modifiers];
break;
}
}
return ret;
}
static cops_t pckbd_ops = {
&pckbd_open,
&pckbd_close,
&pckbd_readb,
NULL,
};
int pckbd_register (void)
{
pckbd_t *kbd;
kbd = malloc(sizeof(pckbd_t));
if (kbd == NULL)
return -1;
memset(kbd, 0, sizeof(pckbd_t));
/* Set IO base */
/* XXX: should be a parameter... */
kbd->io_base = PCKBD_IO_BASE;
/* Set default keymap */
kbd->map = pc_map_us;
kbd->maplen = sizeof(pc_map_us) / sizeof(kbdmap_t);
/* Reset modifiers state */
kbd->modifiers = 0x00;
chardev_register(CHARDEV_KBD, &pckbd_ops, kbd);
return 0;
}
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