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/*-
* Copyright (c) 1998 Michael Smith (msmith@freebsd.org)
* Copyright (c) 1997 Kazutaka YOKOTA (yokota@zodiac.mech.utsunomiya-u.ac.jp)
* All rights reserved.
*
* 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.
*
* 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.
*
* Id: probe_keyboard.c,v 1.13 1997/06/09 05:10:55 bde Exp
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/boot/i386/libi386/vidconsole.c 232417 2012-03-03 00:36:30Z jkim $");
#include <stand.h>
#include <bootstrap.h>
#include <btxv86.h>
#include <machine/psl.h>
#include "libi386.h"
#if KEYBOARD_PROBE
#include <machine/cpufunc.h>
static int probe_keyboard(void);
#endif
static void vidc_probe(struct console *cp);
static int vidc_init(int arg);
static void vidc_putchar(int c);
static int vidc_getchar(void);
static int vidc_ischar(void);
static int vidc_started;
#ifdef TERM_EMU
#define MAXARGS 8
#define DEFAULT_FGCOLOR 7
#define DEFAULT_BGCOLOR 0
void end_term(void);
void bail_out(int c);
void vidc_term_emu(int c);
void get_pos(int *x, int *y);
void curs_move(int *_x, int *_y, int x, int y);
void write_char(int c, int fg, int bg);
void scroll_up(int rows, int fg, int bg);
void CD(void);
void CM(void);
void HO(void);
static int args[MAXARGS], argc;
static int fg_c, bg_c, curx, cury;
static int esc;
#endif
struct console vidconsole = {
"vidconsole",
"internal video/keyboard",
0,
vidc_probe,
vidc_init,
vidc_putchar,
vidc_getchar,
vidc_ischar
};
static void
vidc_probe(struct console *cp)
{
/* look for a keyboard */
#if KEYBOARD_PROBE
if (probe_keyboard())
#endif
{
cp->c_flags |= C_PRESENTIN;
}
/* XXX for now, always assume we can do BIOS screen output */
cp->c_flags |= C_PRESENTOUT;
}
static int
vidc_init(int arg)
{
int i;
if (vidc_started && arg == 0)
return (0);
vidc_started = 1;
#ifdef TERM_EMU
/* Init terminal emulator */
end_term();
get_pos(&curx, &cury);
curs_move(&curx, &cury, curx, cury);
fg_c = DEFAULT_FGCOLOR;
bg_c = DEFAULT_BGCOLOR;
#endif
for (i = 0; i < 10 && vidc_ischar(); i++)
(void)vidc_getchar();
return (0); /* XXX reinit? */
}
void
vidc_biosputchar(int c)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0xe00 | (c & 0xff);
v86.ebx = 0x7;
v86int();
}
static void
vidc_rawputchar(int c)
{
int i;
if (c == '\t')
/* lame tab expansion */
for (i = 0; i < 8; i++)
vidc_rawputchar(' ');
else {
#ifndef TERM_EMU
vidc_biosputchar(c);
#else
/* Emulate AH=0eh (teletype output) */
switch(c) {
case '\a':
vidc_biosputchar(c);
return;
case '\r':
curx = 0;
curs_move(&curx, &cury, curx, cury);
return;
case '\n':
cury++;
if (cury > 24) {
scroll_up(1, fg_c, bg_c);
cury--;
} else {
curs_move(&curx, &cury, curx, cury);
}
return;
case '\b':
if (curx > 0) {
curx--;
curs_move(&curx, &cury, curx, cury);
/* write_char(' ', fg_c, bg_c); XXX destructive(!) */
return;
}
return;
default:
write_char(c, fg_c, bg_c);
curx++;
if (curx > 79) {
curx = 0;
cury++;
}
if (cury > 24) {
curx = 0;
scroll_up(1, fg_c, bg_c);
cury--;
}
}
curs_move(&curx, &cury, curx, cury);
#endif
}
}
#ifdef TERM_EMU
/* Get cursor position on the screen. Result is in edx. Sets
* curx and cury appropriately.
*/
void
get_pos(int *x, int *y)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0300;
v86.ebx = 0x0;
v86int();
*x = v86.edx & 0x00ff;
*y = (v86.edx & 0xff00) >> 8;
}
/* Move cursor to x rows and y cols (0-based). */
void
curs_move(int *_x, int *_y, int x, int y)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0200;
v86.ebx = 0x0;
v86.edx = ((0x00ff & y) << 8) + (0x00ff & x);
v86int();
*_x = x;
*_y = y;
/* If there is ctrl char at this position, cursor would be invisible.
* Make it a space instead.
*/
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0800;
v86.ebx = 0x0;
v86int();
#define isvisible(c) (((c) >= 32) && ((c) < 255))
if (!isvisible(v86.eax & 0x00ff)) {
write_char(' ', fg_c, bg_c);
}
}
/* Scroll up the whole window by a number of rows. If rows==0,
* clear the window. fg and bg are attributes for the new lines
* inserted in the window.
*/
void
scroll_up(int rows, int fgcol, int bgcol)
{
if (rows == 0)
rows = 25;
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0600 + (0x00ff & rows);
v86.ebx = (bgcol << 12) + (fgcol << 8);
v86.ecx = 0x0;
v86.edx = 0x184f;
v86int();
}
/* Write character and attribute at cursor position. */
void
write_char(int c, int fgcol, int bgcol)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0900 + (0x00ff & c);
v86.ebx = (bgcol << 4) + fgcol;
v86.ecx = 0x1;
v86int();
}
/**************************************************************/
/*
* Screen manipulation functions. They use accumulated data in
* args[] and argc variables.
*
*/
/* Clear display from current position to end of screen */
void
CD(void)
{
get_pos(&curx, &cury);
if (curx > 0) {
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0600;
v86.ebx = (bg_c << 4) + fg_c;
v86.ecx = (cury << 8) + curx;
v86.edx = (cury << 8) + 79;
v86int();
if (++cury > 24) {
end_term();
return;
}
}
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0600;
v86.ebx = (bg_c << 4) + fg_c;
v86.ecx = (cury << 8) + 0;
v86.edx = (24 << 8) + 79;
v86int();
end_term();
}
/* Absolute cursor move to args[0] rows and args[1] columns
* (the coordinates are 1-based).
*/
void
CM(void)
{
if (args[0] > 0)
args[0]--;
if (args[1] > 0)
args[1]--;
curs_move(&curx, &cury, args[1], args[0]);
end_term();
}
/* Home cursor (left top corner) */
void
HO(void)
{
argc = 1;
args[0] = args[1] = 1;
CM();
}
/* Clear internal state of the terminal emulation code */
void
end_term(void)
{
esc = 0;
argc = -1;
}
/* Gracefully exit ESC-sequence processing in case of misunderstanding */
void
bail_out(int c)
{
char buf[16], *ch;
int i;
if (esc) {
vidc_rawputchar('\033');
if (esc != '\033')
vidc_rawputchar(esc);
for (i = 0; i <= argc; ++i) {
sprintf(buf, "%d", args[i]);
ch = buf;
while (*ch)
vidc_rawputchar(*ch++);
}
}
vidc_rawputchar(c);
end_term();
}
static void
get_arg(int c)
{
if (argc < 0)
argc = 0;
args[argc] *= 10;
args[argc] += c - '0';
}
/* Emulate basic capabilities of cons25 terminal */
void
vidc_term_emu(int c)
{
static int ansi_col[] = {
0, 4, 2, 6, 1, 5, 3, 7,
};
int t;
int i;
switch (esc) {
case 0:
switch (c) {
case '\033':
esc = c;
break;
default:
vidc_rawputchar(c);
break;
}
break;
case '\033':
switch (c) {
case '[':
esc = c;
args[0] = 0;
argc = -1;
break;
default:
bail_out(c);
break;
}
break;
case '[':
switch (c) {
case ';':
if (argc < 0) /* XXX */
argc = 0;
else if (argc + 1 >= MAXARGS)
bail_out(c);
else
args[++argc] = 0;
break;
case 'H':
if (argc < 0)
HO();
else if (argc == 1)
CM();
else
bail_out(c);
break;
case 'J':
if (argc < 0)
CD();
else
bail_out(c);
break;
case 'm':
if (argc < 0) {
fg_c = DEFAULT_FGCOLOR;
bg_c = DEFAULT_BGCOLOR;
}
for (i = 0; i <= argc; ++i) {
switch (args[i]) {
case 0: /* back to normal */
fg_c = DEFAULT_FGCOLOR;
bg_c = DEFAULT_BGCOLOR;
break;
case 1: /* bold */
fg_c |= 0x8;
break;
case 4: /* underline */
case 5: /* blink */
bg_c |= 0x8;
break;
case 7: /* reverse */
t = fg_c;
fg_c = bg_c;
bg_c = t;
break;
case 30: case 31: case 32: case 33:
case 34: case 35: case 36: case 37:
fg_c = ansi_col[args[i] - 30];
break;
case 39: /* normal */
fg_c = DEFAULT_FGCOLOR;
break;
case 40: case 41: case 42: case 43:
case 44: case 45: case 46: case 47:
bg_c = ansi_col[args[i] - 40];
break;
case 49: /* normal */
bg_c = DEFAULT_BGCOLOR;
break;
}
}
end_term();
break;
default:
if (isdigit(c))
get_arg(c);
else
bail_out(c);
break;
}
break;
default:
bail_out(c);
break;
}
}
#endif
static void
vidc_putchar(int c)
{
#ifdef TERM_EMU
vidc_term_emu(c);
#else
vidc_rawputchar(c);
#endif
}
static int
vidc_getchar(void)
{
if (vidc_ischar()) {
v86.ctl = 0;
v86.addr = 0x16;
v86.eax = 0x0;
v86int();
return (v86.eax & 0xff);
} else {
return (-1);
}
}
static int
vidc_ischar(void)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x16;
v86.eax = 0x100;
v86int();
return (!V86_ZR(v86.efl));
}
#if KEYBOARD_PROBE
#define PROBE_MAXRETRY 5
#define PROBE_MAXWAIT 400
#define IO_DUMMY 0x84
#define IO_KBD 0x060 /* 8042 Keyboard */
/* selected defines from kbdio.h */
#define KBD_STATUS_PORT 4 /* status port, read */
#define KBD_DATA_PORT 0 /* data port, read/write
* also used as keyboard command
* and mouse command port
*/
#define KBDC_ECHO 0x00ee
#define KBDS_ANY_BUFFER_FULL 0x0001
#define KBDS_INPUT_BUFFER_FULL 0x0002
#define KBD_ECHO 0x00ee
/* 7 microsec delay necessary for some keyboard controllers */
static void
delay7(void)
{
/*
* I know this is broken, but no timer is available yet at this stage...
* See also comments in `delay1ms()'.
*/
inb(IO_DUMMY); inb(IO_DUMMY);
inb(IO_DUMMY); inb(IO_DUMMY);
inb(IO_DUMMY); inb(IO_DUMMY);
}
/*
* This routine uses an inb to an unused port, the time to execute that
* inb is approximately 1.25uS. This value is pretty constant across
* all CPU's and all buses, with the exception of some PCI implentations
* that do not forward this I/O address to the ISA bus as they know it
* is not a valid ISA bus address, those machines execute this inb in
* 60 nS :-(.
*
*/
static void
delay1ms(void)
{
int i = 800;
while (--i >= 0)
(void)inb(0x84);
}
/*
* We use the presence/absence of a keyboard to determine whether the internal
* console can be used for input.
*
* Perform a simple test on the keyboard; issue the ECHO command and see
* if the right answer is returned. We don't do anything as drastic as
* full keyboard reset; it will be too troublesome and take too much time.
*/
static int
probe_keyboard(void)
{
int retry = PROBE_MAXRETRY;
int wait;
int i;
while (--retry >= 0) {
/* flush any noise */
while (inb(IO_KBD + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL) {
delay7();
inb(IO_KBD + KBD_DATA_PORT);
delay1ms();
}
/* wait until the controller can accept a command */
for (wait = PROBE_MAXWAIT; wait > 0; --wait) {
if (((i = inb(IO_KBD + KBD_STATUS_PORT))
& (KBDS_INPUT_BUFFER_FULL | KBDS_ANY_BUFFER_FULL)) == 0)
break;
if (i & KBDS_ANY_BUFFER_FULL) {
delay7();
inb(IO_KBD + KBD_DATA_PORT);
}
delay1ms();
}
if (wait <= 0)
continue;
/* send the ECHO command */
outb(IO_KBD + KBD_DATA_PORT, KBDC_ECHO);
/* wait for a response */
for (wait = PROBE_MAXWAIT; wait > 0; --wait) {
if (inb(IO_KBD + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL)
break;
delay1ms();
}
if (wait <= 0)
continue;
delay7();
i = inb(IO_KBD + KBD_DATA_PORT);
#ifdef PROBE_KBD_BEBUG
printf("probe_keyboard: got 0x%x.\n", i);
#endif
if (i == KBD_ECHO) {
/* got the right answer */
return (1);
}
}
return (0);
}
#endif /* KEYBOARD_PROBE */