/* * 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 #include #define I8042_CMD_READ_MODE 0x20 #define I8042_CMD_WRITE_MODE 0x60 #define I8042_MODE_XLATE 0x40 unsigned short map[4][0x57] = { { /* No modifier */ 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, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5), KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME, KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END, KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00 }, { /* Shift */ 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, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5), KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME, KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END, KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00 }, { /* ALT */ 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, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5), KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME, KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END, KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00 }, { /* Shift-ALT */ 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, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5), KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME, KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END, KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00 } }; #define MOD_SHIFT (1 << 0) #define MOD_CTRL (1 << 1) #define MOD_CAPSLOCK (1 << 2) #define MOD_ALT (1 << 3) 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 0x38: modifier |= MOD_ALT; break; case 0x80 | 0x38: modifier &= ~MOD_ALT; 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; if (modifier & MOD_ALT) shift += 2; ret = map[shift][ch]; if (modifier & MOD_CTRL) ret = (ret >= 'a' && ret <= 'z') ? 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; /* Empty keyboard buffer */ while (keyboard_havechar()) keyboard_getchar(); /* 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); }