coreboot-kgpe-d16/payloads/libpayload/curses/keyboard.c

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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de>
* 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.
*/
/*
* This file handles reading keystrokes from serial and the console
* and "cooking" them so that they are correct for curses.
* Also, implement key related functions (mainly wgetch)
*
* TODO:
* Actually cook the serial (handle special keys)
*/
#include "local.h"
static int _halfdelay = 0;
/* ============== Serial ==================== */
/* We treat serial like a vt100 terminal. For now we
do the cooking in here, but we should probably eventually
pass it to dedicated vt100 code */
static int getkeyseq(char *buffer, int len)
{
int i;
for(i = 0; i < 75; i++) {
if (serial_havechar())
break;
mdelay(1);
}
if (i == 75)
return len;
buffer[len++] = serial_getchar();
return getkeyseq(buffer, len);
}
static struct {
char *seq;
int key;
} escape_codes[] = {
{ "[A", KEY_UP },
{ "[B", KEY_DOWN },
{ "[C", KEY_RIGHT },
{ "[D", KEY_LEFT },
{ "OP", KEY_F(1) },
{ "OQ", KEY_F(2) },
{ "OR", KEY_F(3) },
{ "OS", KEY_F(4) },
{ "[15~", KEY_F(5) },
{ "[17~", KEY_F(6) },
{ "[18~", KEY_F(7) },
{ "[19~", KEY_F(8) },
{ "[20~", KEY_F(9) },
{ "[21~", KEY_F(10) },
{ "[24~", KEY_F(12) },
{ NULL },
};
static int handle_escape(void)
{
char buffer[5];
int len = getkeyseq(buffer, 0);
int i, t;
if (len == 0)
return 27;
for(i = 0; escape_codes[i].seq != NULL; i++) {
char *p = escape_codes[i].seq;
for(t = 0; t < len; t++) {
if (!*p || *p != buffer[t])
break;
p++;
}
if (t == len)
return escape_codes[i].key;
}
return 0;
}
static int cook_serial(unsigned char ch)
{
switch(ch) {
case 8:
return KEY_BACKSPACE;
case 13:
return KEY_ENTER;
case 27:
return handle_escape();
default:
return ch;
}
}
/* ================ Keyboard ================ */
/* Scancode macros */
#define DOWN(_c) (0x80 | (_c))
#define UP(_c) (_c)
#define ISDOWN(_c) ((_c) & 0x80)
#define ISUP(_c) (!ISDOWN((_c)))
#define SCANCODE(_c) ((_c) & ~0x80)
/* Scancode definitions for the modifiers */
#define SCANCODE_RSHIFT 0x36
#define SCANCODE_LSHIFT 0x2a
#define SCANCODE_CAPSLOCK 0x3a
#define SCANCODE_LALT 0x38
#define SCANCODE_LCTRL 0x1d
/* Modifier flags */
#define SHIFT_MODIFIER 0x1
#define CAPSLOCK_MODIFIER 0x2
#define ALT_MODIFIER 0x4
#define CTRL_MODIFIER 0x8
#define CTRL(_c) (_c & 0x1f)
struct {
int normal;
int shift;
} scancode_map[] = {
{ },
{ CTRL('['), CTRL('[')},
{ '1', '!' },
{ '2', '@' },
{ '3', '#' },
{ '4', '$' },
{ '5', '%' },
{ '6', '^' },
{ '7', '&' },
{ '8', '*' },
{ '9', '(' },
{ '0', ')' },
{ '-', '_' },
{ '=', '+' },
{ KEY_BACKSPACE, KEY_BACKSPACE},
{ CTRL('I' ), KEY_BTAB }, /* 0x0F */
{ 'q', 'Q' },
{ 'w', 'W' },
{ 'e', 'E' },
{ 'r', 'R' },
{ 't', 'T' },
{ 'y', 'Y' },
{ 'u', 'U' },
{ 'i', 'I' },
{ 'o', 'O' },
{ 'p', 'P' },
{ '[', '{' },
{ ']', '{' },
{ KEY_ENTER, KEY_ENTER },
{ 0 , 0 },
{ 'a', 'A' },
{ 's', 'S' }, /* 0x1F */
{ 'd', 'D' },
{ 'f', 'F' },
{ 'g', 'G' },
{ 'h', 'H' },
{ 'j', 'J' },
{ 'k', 'K' },
{ 'l', 'L' },
{ ';', ':' },
{ '\'', '\"' },
{ '`', '~', },
{ 0, 0 },
{ '\\', '|' },
{ 'z', 'Z' },
{ 'x', 'X' },
{ 'c', 'C' },
{ 'v', 'V' }, /* 0x2F */
{ 'b', 'B' },
{ 'n', 'N' },
{ 'm', 'M' },
{ ',', '<'},
{ '.', '>' },
{ '/', '?' },
{ 0, 0 }, /* RSHIFT */
{ '*', '*' },
{ 0, 0 }, /* LALT */
{ ' ', ' ' }, /* Space */
{ 0, 0 }, /* Capslock */
{ KEY_F(1), KEY_F(1) },
{ KEY_F(2), KEY_F(2) },
{ KEY_F(3), KEY_F(3) },
{ KEY_F(4), KEY_F(4) },
{ KEY_F(5), KEY_F(5) }, /* 0x3F */
{ KEY_F(6), KEY_F(6) },
{ KEY_F(7), KEY_F(7) },
{ KEY_F(8), KEY_F(8) },
{ KEY_F(9), KEY_F(9) },
{ KEY_F(10), KEY_F(10) },
{ 0, 0 }, /* Numlock */
{ 0, 0 }, /* Scroll lock */
{ KEY_HOME, KEY_HOME },
{ KEY_UP, KEY_UP },
{ KEY_PPAGE, KEY_PPAGE },
{ '-', '-' },
{ KEY_LEFT, KEY_LEFT },
{ 0, 0 },
{ KEY_RIGHT, KEY_RIGHT },
{ '-', '-' },
{ KEY_END, KEY_END }, /* 0x4F */
{ KEY_DOWN, KEY_DOWN },
{ KEY_NPAGE, KEY_NPAGE },
{ KEY_IC, KEY_IC },
{ KEY_DC, KEY_DC },
{ 0, 0 }, /* sysreq */
{ 0, 0 },
{ KEY_F(11), KEY_F(11) },
{ KEY_F(12), KEY_F(12) },
};
static int cook_scancodes(unsigned char code)
{
static int modifiers = 0;
int ch = 0, sc, shift;
switch (code) {
case DOWN(SCANCODE_RSHIFT):
case DOWN(SCANCODE_LSHIFT):
modifiers |= SHIFT_MODIFIER;
return 0;
case UP(SCANCODE_RSHIFT):
case UP(SCANCODE_LSHIFT):
modifiers &= ~SHIFT_MODIFIER;
return 0;
case UP(SCANCODE_CAPSLOCK):
if (modifiers & CAPSLOCK_MODIFIER)
modifiers &= ~CAPSLOCK_MODIFIER;
else
modifiers |= CAPSLOCK_MODIFIER;
return 0;
case DOWN(SCANCODE_LALT):
modifiers |= ALT_MODIFIER;
return 0;
case UP(SCANCODE_LALT):
modifiers &= ~ALT_MODIFIER;
return 0;
case DOWN(SCANCODE_LCTRL):
modifiers |= CTRL_MODIFIER;
return 0;
case UP(SCANCODE_LCTRL):
modifiers &= ~CTRL_MODIFIER;
return 0;
}
/* Only process keys on an upstroke. */
if (!ISUP(code))
return 0;
sc = SCANCODE(code);
if (sc == 0 || sc > 0x59)
return ERR;
shift = (modifiers & SHIFT_MODIFIER) ^ (modifiers & CAPSLOCK_MODIFIER);
ch = shift ? scancode_map[sc].shift : scancode_map[sc].normal;
if (modifiers & CTRL_MODIFIER)
ch = (ch >= 0x3F && ch <= 0x5F) ? CTRL(ch) : 0;
return ch;
}
static int curses_getchar(int delay)
{
unsigned char c = 0;
int ret;
do {
if (curses_flags & F_ENABLE_CONSOLE)
c = inb(0x64);
if ((c & 1) == 0) {
if ((curses_flags & F_ENABLE_SERIAL) &&
serial_havechar()) {
c = serial_getchar();
return cook_serial(c);
}
if (delay == 0)
break;
if (delay > 0) {
mdelay(100);
delay--;
}
continue;
}
c = inb(0x60);
ret = cook_scancodes(c);
if (ret != 0) {
return ret;
}
} while (1);
return ERR;
}
/* === Public functions === */
int wgetch(WINDOW *win)
{
int delay = -1;
if (_halfdelay || win->_delay)
delay = win->_delay ? 0 : _halfdelay;
return curses_getchar(delay);
}
int nodelay(WINDOW *win, NCURSES_BOOL flag)
{
win->_delay = flag ? 1 : 0;
return 0;
}
int halfdelay(int tenths)
{
if (tenths > 255)
return ERR;
_halfdelay = tenths;
return 0;
}
int nocbreak(void)
{
/* Remove half delay timeout. */
_halfdelay = 0;
return 0;
}
#ifdef CONFIG_VGA_CONSOLE
void curses_enable_vga(int state)
{
if (state)
curses_flags |= F_ENABLE_CONSOLE;
else
curses_flags &= ~F_ENABLE_CONSOLE;
}
#else
void curses_enable_vga(int state) { }
#endif
#ifdef CONFIG_SERIAL_CONSOLE
void curses_enable_serial(int state)
{
if (state)
curses_flags |= F_ENABLE_SERIAL;
else
curses_flags &= ~F_ENABLE_SERIAL;
}
#else
void curses_enable_serial(int state) { }
#endif