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coreboot-kgpe-d16/payloads/libpayload/drivers/i8042/keyboard.c
Paul Menzel 7ae606f57f libpayload: Reset PS/2 keyboard 
Loading a libpayload based payload like coreinfo or FILO from SeaBIOS or
GRUB pressing keys does not give the expected results.

For example, pressing F1 gives the character 24 translated to scan code
6a. ESC for example 43 (111) in coreinfo loaded from SeaBIOS on QEMU
Q35.

The problem is not reproducible using the payload directly, that means
without SeaBIOS or GRUB. The problem seems to be, that those have already
initialized the PS/2 controller and AT keyboard.

Comparing it with coreboot’s PS/2 keyboard code, the keyboard needs to
be reset. That seems to fix the issue, when the keyboard was initialized
before.

TEST=Build coreboot for QEMU Q35 with SeaBIOS, and coreinfo as secondary
payload. Run

    qemu-system-i386 -M q35 -L /dev/shm -bios build/coreboot.rom -serial stdio

press 3 to select the coreinfo payload, and verify that the keys F1 and
F2 are working.

Same with coreinfo loaded from GRUB on the ASRock E350M1.

Change-Id: I2732292ac316d4bc0029ecb5c95fa7d1e7d68947
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32951
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-05-27 08:15:42 +00:00

370 lines
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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>
#include "i8042.h"
#define POWER_BUTTON 0x90
struct layout_maps {
const char *country;
const unsigned short map[4][0x59];
};
static struct layout_maps *map;
static int modifier = 0;
static struct layout_maps keyboard_layouts[] = {
#if 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, KEY_F(11),
KEY_F(12),
},
{ /* 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, KEY_F(11),
KEY_F(12),
},
{ /* 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, KEY_F(11),
KEY_F(12),
},
{ /* 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, KEY_F(11),
KEY_F(12),
}
}},
#endif
#if 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, KEY_F(11),
KEY_F(12),
},
{ /* 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, KEY_F(11),
KEY_F(12),
},
{ /* 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, KEY_F(11),
KEY_F(12),
},
{ /* 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, KEY_F(11),
KEY_F(12),
}
}},
#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(I8042_KBCMD_SET_MODE_IND))
keyboard_cmd(I8042_MODE_CAPS_LOCK_OFF);
} else {
modifier |= KB_MOD_CAPSLOCK;
if (keyboard_cmd(I8042_KBCMD_SET_MODE_IND))
keyboard_cmd(I8042_MODE_CAPS_LOCK_ON);
}
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 < 0x59) {
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();
/* fallthrough */
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,
.input_type = CONSOLE_INPUT_TYPE_EC,
};
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(I8042_CMD_EN_KB);
/* Reset keyboard and self test (keyboard side) */
ret = keyboard_cmd(I8042_KBCMD_RESET);
if (ret != I8042_KBCMD_ACK) {
printf("ERROR: Keyboard reset failed ACK: 0x%x\n", ret);
return;
}
/* Set scancode set 1 */
ret = keyboard_cmd(I8042_KBCMD_SET_SCANCODE);
if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE))
return;
ret = keyboard_cmd(I8042_SCANCODE_SET_1);
if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE))
return;
/* Enable scanning */
ret = keyboard_cmd(I8042_KBCMD_EN);
if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE))
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();
/* Disable scanning */
keyboard_cmd(I8042_KBCMD_DEFAULT_DIS);
/* 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();
}
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