diff options
Diffstat (limited to 'payloads/libpayload/drivers/keyboard.c')
-rw-r--r-- | payloads/libpayload/drivers/keyboard.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/keyboard.c b/payloads/libpayload/drivers/keyboard.c new file mode 100644 index 0000000000..0dc93713b8 --- /dev/null +++ b/payloads/libpayload/drivers/keyboard.c @@ -0,0 +1,126 @@ +/* + * 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 <arch/io.h> +#include <libpayload.h> + +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; + 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; + + 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; +} |