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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
* Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org>
*
* 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 <keycodes.h>
#include <libpayload-config.h>
#include <libpayload.h>
#define I8042_CMD_DIS_KB 0xad
#define POWER_BUTTON 0x90
struct layout_maps {
const char *country;
const unsigned short map[4][0x57];
};
static struct layout_maps *map;
static int modifier = 0;
static struct layout_maps keyboard_layouts[] = {
#if IS_ENABLED(CONFIG_LP_PC_KEYBOARD_LAYOUT_US)
{ .country = "us", .map = {
{ /* 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
}
}},
#endif
#if IS_ENABLED(CONFIG_LP_PC_KEYBOARD_LAYOUT_DE)
{ .country = "de", .map = {
{ /* No modifier */
0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
0x37, 0x38, 0x39, 0x30, 0x00, 0x27, 0x08, 0x09,
0x71, 0x77, 0x65, 0x72, 0x74, 0x7A, 0x75, 0x69,
0x6F, 0x70, 0x00, 0x2B, 0x0A, 0x00, 0x61, 0x73,
0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x00,
0x00, 0x5E, 0x00, 0x23, 0x79, 0x78, 0x63, 0x76,
0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2D, 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, 0x3C
},
{ /* Shift */
0x00, 0x1B, 0x21, 0x22, 0xA7, 0x24, 0x25, 0x26,
0x2F, 0x28, 0x29, 0x3D, 0x3F, 0x60, 0x08, 0x00,
0x51, 0x57, 0x45, 0x52, 0x54, 0x5A, 0x55, 0x49,
0x4F, 0x50, 0x00, 0x2A, 0x0A, 0x00, 0x41, 0x53,
0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x00,
0x00, 0x7E, 0x00, 0x27, 0x59, 0x58, 0x43, 0x56,
0x42, 0x4E, 0x4D, 0x3B, 0x3A, 0x5F, 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, 0x3E
},
{ /* ALT */
0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
0x7B, 0x5B, 0x5D, 0x7D, 0x5C, 0x3D, 0x08, 0x09,
0x40, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
0x6F, 0x70, 0x5B, 0x7E, 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, 0x7C
},
{ /* Shift-ALT */
/* copied from US */
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
}
}},
#endif
};
static unsigned char keyboard_cmd(unsigned char cmd)
{
i8042_write_data(cmd);
return i8042_wait_read_ps2() == 0xfa;
}
int keyboard_havechar(void)
{
return i8042_data_ready_ps2();
}
unsigned char keyboard_get_scancode(void)
{
unsigned char ch;
while (!keyboard_havechar()) ;
ch = i8042_read_data_ps2();
switch (ch) {
case 0x36:
case 0x2a:
modifier |= KB_MOD_SHIFT;
break;
case 0x80 | 0x36:
case 0x80 | 0x2a:
modifier &= ~KB_MOD_SHIFT;
break;
case 0x38:
modifier |= KB_MOD_ALT;
break;
case 0x80 | 0x38:
modifier &= ~KB_MOD_ALT;
break;
case 0x1d:
modifier |= KB_MOD_CTRL;
break;
case 0x80 | 0x1d:
modifier &= ~KB_MOD_CTRL;
break;
case 0x3a:
if (modifier & KB_MOD_CAPSLOCK) {
modifier &= ~KB_MOD_CAPSLOCK;
if (keyboard_cmd(0xed))
keyboard_cmd(0 << 2);
} else {
modifier |= KB_MOD_CAPSLOCK;
if (keyboard_cmd(0xed))
keyboard_cmd(1 << 2);
}
break;
}
return ch;
}
int keyboard_getmodifier(void)
{
return modifier;
}
int keyboard_getchar(void)
{
unsigned char ch;
int shift;
int ret = 0;
while (!keyboard_havechar()) ;
ch = keyboard_get_scancode();
if (!(ch & 0x80) && ch < 0x57) {
shift =
(modifier & KB_MOD_SHIFT) ^ (modifier & KB_MOD_CAPSLOCK) ? 1 : 0;
if (modifier & KB_MOD_ALT)
shift += 2;
ret = map->map[shift][ch];
if (modifier & KB_MOD_CTRL) {
switch (ret) {
case 'a' ... 'z':
ret &= 0x1f;
break;
case KEY_DC:
/* vulcan nerve pinch */
if ((modifier & KB_MOD_ALT) && reset_handler)
reset_handler();
default:
ret = 0;
}
}
}
if (ch == 0x5e)
ret = POWER_BUTTON;
return ret;
}
/**
* Set keyboard layout
* @param country string describing the keyboard layout language.
* Valid values are "us", "de".
*/
int keyboard_set_layout(char *country)
{
int i;
for (i=0; i<ARRAY_SIZE(keyboard_layouts); i++) {
if (strncmp(keyboard_layouts[i].country, country,
strlen(keyboard_layouts[i].country)))
continue;
/* Found, changing keyboard layout */
map = &keyboard_layouts[i];
return 0;
}
/* Nothing found, not changed */
return -1;
}
static struct console_input_driver cons = {
.havekey = keyboard_havechar,
.getchar = keyboard_getchar
};
void keyboard_init(void)
{
unsigned int ret;
map = &keyboard_layouts[0];
/* Initialized keyboard controller. */
if (!i8042_probe() || !i8042_has_ps2())
return;
/* Empty keyboard buffer */
while (keyboard_havechar())
keyboard_getchar();
/* Enable first PS/2 port */
i8042_cmd(0xae);
/* Set scancode set 1 */
ret = keyboard_cmd(0xf0);
if (!ret)
return;
ret = keyboard_cmd(0x01);
if (!ret)
return;
/* Enable scanning */
ret = keyboard_cmd(0xf4);
if (!ret)
return;
console_add_input_driver(&cons);
}
void keyboard_disconnect(void)
{
/* If 0x64 returns 0xff, then we have no keyboard
* controller */
if (inb(0x64) == 0xFF)
return;
if (!i8042_has_ps2())
return;
/* Empty keyboard buffer */
while (keyboard_havechar())
keyboard_getchar();
/* Send keyboard disconnect command */
i8042_cmd(I8042_CMD_DIS_KB);
/* Hand off with empty buffer */
while (keyboard_havechar())
keyboard_getchar();
/* Release keyboard controller driver */
i8042_close();
}