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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2007 Free Software Foundation, Inc.
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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#include <grub/machine/console.h>
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#include <grub/cpu/io.h>
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#include <grub/misc.h>
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#define CAPS_LOCK 0x3a
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#define KEYBOARD_STATUS_SHIFT_L (1 << 0)
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#define KEYBOARD_STATUS_SHIFT_R (1 << 1)
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#define KEYBOARD_STATUS_ALT_L (1 << 2)
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#define KEYBOARD_STATUS_ALT_R (1 << 3)
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#define KEYBOARD_STATUS_CTRL_L (1 << 4)
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#define KEYBOARD_STATUS_CTRL_R (1 << 5)
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#define KEYBOARD_STATUS_CAPS_LOCK (1 << 6)
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#define KEYBOARD_REG_DATA 0x60
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#define KEYBOARD_REG_STATUS 0x64
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#define KEYBOARD_ISMAKE(x) !((x) & 0x80)
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#define KEYBOARD_ISREADY(x) (((x) & 0x01) == 0)
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#define KEYBOARD_SCANCODE(x) ((x) & 0x7f)
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static short at_keyboard_status = 0;
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static char keyboard_map[128] =
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'\0', '\0', '1', '2', '3', '4', '5', '6',
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'7', '8', '9', '0', '-', '=', '\b', '\t',
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'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',
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'o', 'p', '[', ']', '\n', '\0', 'a', 's',
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'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
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'\'', '`', '\0', '\\', 'z', 'x', 'c', 'v',
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'b', 'n', 'm', ',', '.', '/', '\0', '*',
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'\0', ' ', '\0', '\0', '\0', '\0', '\0', '\0',
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'\0', '\0', '\0', '\0', '\0', '\0', '\0', '7',
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'8', '9', '-', '4', '5', '6', '+', '1',
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static char keyboard_map_shift[128] =
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'\0', '\0', '!', '@', '#', '$', '%', '^',
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'&', '*', '(', ')', '_', '+', '\b', '\t',
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'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
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'O', 'P', '{', '}', '\n', '\0', 'A', 'S',
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'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',
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'\"', '~', '\0', '|', 'Z', 'X', 'C', 'V',
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'B', 'N', 'M', '<', '>', '?', '\0', '*',
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'\0', ' ', '\0', '\0', '\0', '\0', '\0', '\0',
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'\0', '\0', '\0', '\0', '\0', '\0', '\0', '7',
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'8', '9', '-', '4', '5', '6', '+', '1',
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/* FIXME: This should become an interrupt service routine. For now
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it's just used to catch events from control keys. */
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grub_keyboard_isr (char key)
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char is_make = KEYBOARD_ISMAKE (key);
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key = KEYBOARD_SCANCODE (key);
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at_keyboard_status |= KEYBOARD_STATUS_SHIFT_L;
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at_keyboard_status |= KEYBOARD_STATUS_SHIFT_R;
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at_keyboard_status |= KEYBOARD_STATUS_CTRL_L;
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at_keyboard_status |= KEYBOARD_STATUS_ALT_L;
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/* Skip grub_dprintf. */
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at_keyboard_status &= ~KEYBOARD_STATUS_SHIFT_L;
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at_keyboard_status &= ~KEYBOARD_STATUS_SHIFT_R;
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at_keyboard_status &= ~KEYBOARD_STATUS_CTRL_L;
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at_keyboard_status &= ~KEYBOARD_STATUS_ALT_L;
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/* Skip grub_dprintf. */
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grub_dprintf ("atkeyb", "Control key 0x%0x was %s\n", key, is_make ? "pressed" : "unpressed");
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/* If there is a raw key pending, return it; otherwise return -1. */
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grub_keyboard_getkey ()
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if (KEYBOARD_ISREADY (grub_inb (KEYBOARD_REG_STATUS)))
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key = grub_inb (KEYBOARD_REG_DATA);
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/* FIXME */ grub_keyboard_isr (key);
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if (! KEYBOARD_ISMAKE (key))
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return (KEYBOARD_SCANCODE (key));
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/* If there is a character pending, return it; otherwise return -1. */
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grub_console_checkkey ()
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key = grub_keyboard_getkey ();
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grub_dprintf ("atkeyb", "Detected key 0x%x\n", key);
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if (at_keyboard_status & KEYBOARD_STATUS_CAPS_LOCK)
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at_keyboard_status &= ~KEYBOARD_STATUS_CAPS_LOCK;
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at_keyboard_status |= KEYBOARD_STATUS_CAPS_LOCK;
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grub_dprintf ("atkeyb", "caps_lock = %d\n", !!(at_keyboard_status & KEYBOARD_STATUS_CAPS_LOCK));
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if (at_keyboard_status & (KEYBOARD_STATUS_SHIFT_L | KEYBOARD_STATUS_SHIFT_R))
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key = keyboard_map_shift[key];
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key = keyboard_map[key];
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if (at_keyboard_status & KEYBOARD_STATUS_CAPS_LOCK)
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if ((key >= 'a') && (key <= 'z'))
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else if ((key >= 'A') && (key <= 'Z'))
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grub_console_getkey ()
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key = grub_console_checkkey ();
added
removed
term/i386/pc/at_keyboard.c
