| /* |
| * This file is part of the libpayload project. |
| * |
| * Copyright (C) 2008 Advanced Micro Devices, Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * 3. 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <libpayload.h> |
| |
| #define I8042_CMD_READ_MODE 0x20 |
| #define I8042_CMD_WRITE_MODE 0x60 |
| |
| #define I8042_MODE_XLATE 0x40 |
| |
| unsigned char map[2][0x57] = { |
| { |
| 0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, |
| 0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09, |
| 0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69, |
| 0x6F, 0x70, 0x5B, 0x5D, 0x0A, 0x00, 0x61, 0x73, |
| 0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B, |
| 0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76, |
| 0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A, |
| 0x00, 0x20, |
| }, |
| { |
| 0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E, |
| 0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00, |
| 0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49, |
| 0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53, |
| 0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A, |
| 0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56, |
| 0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A, |
| 0x00, 0x20, |
| } |
| }; |
| |
| #define MOD_SHIFT 1 |
| #define MOD_CTRL 2 |
| #define MOD_CAPSLOCK 4 |
| |
| int keyboard_havechar(void) |
| { |
| unsigned char c = inb(0x64); |
| return c & 1; |
| } |
| |
| unsigned char keyboard_get_scancode(void) |
| { |
| unsigned char ch = 0; |
| |
| if (keyboard_havechar()) |
| ch = inb(0x60); |
| |
| return ch; |
| } |
| |
| int keyboard_getchar(void) |
| { |
| static int modifier = 0; |
| unsigned char ch; |
| int shift; |
| int ret = 0; |
| |
| while (!keyboard_havechar()) ; |
| |
| ch = keyboard_get_scancode(); |
| |
| switch (ch) { |
| case 0x36: |
| case 0x2a: |
| modifier |= MOD_SHIFT; |
| break; |
| case 0x80 | 0x36: |
| case 0x80 | 0x2a: |
| modifier &= ~MOD_SHIFT; |
| break; |
| case 0x1d: |
| modifier |= MOD_CTRL; |
| break; |
| case 0x80 | 0x1d: |
| modifier &= ~MOD_CTRL; |
| break; |
| case 0x3a: |
| if (modifier & MOD_CAPSLOCK) |
| modifier &= ~MOD_CAPSLOCK; |
| else |
| modifier |= MOD_CAPSLOCK; |
| break; |
| } |
| |
| if (!(ch & 0x80) && ch < 0x57) { |
| shift = |
| (modifier & MOD_SHIFT) ^ (modifier & MOD_CAPSLOCK) ? 1 : 0; |
| ret = map[shift][ch]; |
| |
| if (modifier & MOD_CTRL) |
| ret = (ret >= 0x3F && ret <= 0x5F) ? ret & 0x1f : 0; |
| |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| static int keyboard_wait_read(void) |
| { |
| int timeout = 10000; |
| |
| while(timeout-- && !(inb(0x64) & 0x01)) |
| udelay(50); |
| |
| return (timeout <= 0) ? -1 : 0; |
| } |
| |
| static int keyboard_wait_write(void) |
| { |
| int timeout = 10000; |
| |
| while(timeout-- && (inb(0x64) & 0x02)) |
| udelay(50); |
| |
| return (timeout <= 0) ? -1 : 0; |
| } |
| |
| static unsigned char keyboard_get_mode(void) |
| { |
| outb(I8042_CMD_READ_MODE, 0x64); |
| keyboard_wait_read(); |
| return inb(0x60); |
| } |
| |
| static void keyboard_set_mode(unsigned char mode) |
| { |
| outb(I8042_CMD_WRITE_MODE, 0x64); |
| keyboard_wait_write(); |
| outb(mode, 0x60); |
| } |
| |
| void keyboard_init(void) |
| { |
| u8 mode; |
| |
| /* Read the current mode */ |
| mode = keyboard_get_mode(); |
| |
| /* Turn on scancode translate mode so that we can |
| use the scancode set 1 tables */ |
| |
| mode |= I8042_MODE_XLATE; |
| |
| /* Write the new mode */ |
| keyboard_set_mode(mode); |
| } |
| |