blob: 4370b280f14696143ae4d8177993d9c0ac135332 [file] [log] [blame]
/*
* 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 <libpayload-config.h>
#include <usb/usb.h>
#include "local.h"
static int _halfdelay = 0;
/* ============== Serial ==================== */
#ifdef CONFIG_SERIAL_CONSOLE
/* 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 max)
{
int i;
while (1) {
for(i = 0; i < 75; i++) {
if (serial_havechar())
break;
mdelay(1);
}
if (i == 75)
return len;
buffer[len++] = serial_getchar();
if (len == max)
return len;
}
}
static struct {
char *seq;
int key;
} escape_codes[] = {
{ "[A", KEY_UP },
{ "[B", KEY_DOWN },
{ "[C", KEY_RIGHT },
{ "[D", KEY_LEFT },
{ "[F", KEY_END },
{ "[H", KEY_HOME },
{ "[2~", KEY_IC },
{ "[3~", KEY_DC },
{ "[5~", KEY_PPAGE },
{ "[6~", KEY_NPAGE },
{ "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) },
{ "[23~", KEY_F(11) },
{ "[24~", KEY_F(12) },
{ NULL },
};
static int handle_escape(void)
{
char buffer[5];
int len = getkeyseq(buffer, 0, sizeof(buffer));
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;
}
}
#endif
/* ================ Keyboard ================ */
static int curses_getchar(int delay)
{
#if defined(CONFIG_USB_HID) || defined(CONFIG_PC_KEYBOARD) || defined(CONFIG_SERIAL_CONSOLE)
unsigned short c;
#endif
do {
#ifdef CONFIG_USB_HID
usb_poll();
if ((curses_flags & F_ENABLE_CONSOLE) &&
usbhid_havechar()) {
c = usbhid_getchar();
if (c != 0) return c;
}
#endif
#ifdef CONFIG_PC_KEYBOARD
if ((curses_flags & F_ENABLE_CONSOLE) &&
keyboard_havechar()) {
c = keyboard_getchar();
if (c != 0) return c;
}
#endif
#ifdef CONFIG_SERIAL_CONSOLE
if ((curses_flags & F_ENABLE_SERIAL) &&
serial_havechar()) {
c = serial_getchar();
return cook_serial(c);
}
#endif
if (delay == 0)
break;
if (delay > 0) {
mdelay(100);
delay--;
}
} 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;
}
int curses_vga_enabled(void)
{
return (curses_flags & F_ENABLE_CONSOLE) != 0;
}
#else
void curses_enable_vga(int state) { }
int curses_vga_enabled(void) { return 0; }
#endif
#ifdef CONFIG_SERIAL_CONSOLE
void curses_enable_serial(int state)
{
if (state)
curses_flags |= F_ENABLE_SERIAL;
else
curses_flags &= ~F_ENABLE_SERIAL;
}
int curses_serial_enabled(void)
{
return (curses_flags & F_ENABLE_SERIAL) != 0;
}
#else
void curses_enable_serial(int state) { }
int curses_serial_enabled(void) { return 0; }
#endif