libpayload: The initial chunk of code writen by AMD
This is the initial chunk of code written by me and copyrighted by AMD. Includes everything but a few files that we pulled from outside sources. Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3170 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
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126
payloads/libpayload/drivers/keyboard.c
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126
payloads/libpayload/drivers/keyboard.c
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/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <arch/io.h>
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#include <libpayload.h>
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unsigned char map[2][0x57] = {
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{
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0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
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0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09,
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0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
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0x6F, 0x70, 0x5B, 0x5D, 0x0A, 0x00, 0x61, 0x73,
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0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
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0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
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0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
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0x00, 0x20,
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},
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{
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0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
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0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
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0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
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0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
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0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
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0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
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0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
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0x00, 0x20,
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}
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};
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#define MOD_SHIFT 1
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#define MOD_CTRL 2
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#define MOD_CAPSLOCK 4
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int keyboard_havechar(void)
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{
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unsigned char c = inb(0x64);
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return c & 1;
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}
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unsigned char keyboard_get_scancode(void)
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{
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unsigned char ch = 0;
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if (keyboard_havechar())
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ch = inb(0x60);
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return ch;
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}
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int keyboard_getchar(void)
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{
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static int modifier;
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unsigned char ch;
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int shift;
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int ret = 0;
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while(!keyboard_havechar())
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;
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ch = keyboard_get_scancode();
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switch(ch) {
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case 0x36:
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case 0x2a:
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modifier &= ~MOD_SHIFT;
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break;
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case 0x80 | 0x36:
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case 0x80 | 0x2a:
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modifier |= MOD_SHIFT;
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case 0x1d:
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modifier &= ~MOD_CTRL;
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break;
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case 0x80 | 0x1d:
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modifier |= MOD_CTRL;
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break;
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case 0x3a:
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if (modifier & MOD_CAPSLOCK)
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modifier &= ~MOD_CAPSLOCK;
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else
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modifier |= MOD_CAPSLOCK;
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break;
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}
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if (!(ch & 0x80) && ch < 0x57) {
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shift = (modifier & MOD_SHIFT) ^ (modifier & MOD_CAPSLOCK) ? 1 : 0;
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ret = map[shift][ch];
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if (modifier & MOD_CTRL)
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ret = (ret >= 0x3F && ret <= 0x5F) ? ret & 0x1f : 0;
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return ret;
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}
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return ret;
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}
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