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/*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <pci.h>
#include <stdio_dev.h>
#include <i8042.h>
#include <asm/ptrace.h>
#include <asm/io.h>
#include <asm/pci.h>
/* basic textmode I/O from linux kernel */
static char *vidmem = (char *)0xb8000;
static int vidport;
static int lines, cols;
static int orig_x, orig_y;
static void beep(int dur)
{
int i;
outb_p(3, 0x61);
for (i = 0; i < 10*dur; i++)
udelay(1000);
outb_p(0, 0x61);
}
static void scroll(void)
{
int i;
memcpy(vidmem, vidmem + cols * 2, (lines - 1) * cols * 2);
for (i = (lines - 1) * cols * 2; i < lines * cols * 2; i += 2)
vidmem[i] = ' ';
}
static void __video_putc(const char c, int *x, int *y)
{
if (c == '\n') {
(*x) = 0;
if (++(*y) >= lines) {
scroll();
(*y)--;
}
} else if (c == '\b') {
if ((*x) != 0) {
--(*x);
vidmem[((*x) + cols * (*y)) * 2] = ' ';
}
} else if (c == '\r') {
(*x) = 0;
} else if (c == '\a') {
beep(3);
} else if (c == '\t') {
__video_putc(' ', x, y);
__video_putc(' ', x, y);
__video_putc(' ', x, y);
__video_putc(' ', x, y);
__video_putc(' ', x, y);
__video_putc(' ', x, y);
__video_putc(' ', x, y);
__video_putc(' ', x, y);
} else if (c == '\v') {
switch ((*x) % 8) {
case 0:
__video_putc(' ', x, y);
case 7:
__video_putc(' ', x, y);
case 6:
__video_putc(' ', x, y);
case 5:
__video_putc(' ', x, y);
case 4:
__video_putc(' ', x, y);
case 3:
__video_putc(' ', x, y);
case 2:
__video_putc(' ', x, y);
case 1:
__video_putc(' ', x, y);
}
} else if (c == '\f') {
int i;
for (i = 0; i < lines * cols * 2; i += 2)
vidmem[i] = 0;
(*x) = 0;
(*y) = 0;
} else {
vidmem[((*x) + cols * (*y)) * 2] = c;
if (++(*x) >= cols) {
(*x) = 0;
if (++(*y) >= lines) {
scroll();
(*y)--;
}
}
}
}
static void video_putc(struct stdio_dev *dev, const char c)
{
int x, y, pos;
x = orig_x;
y = orig_y;
__video_putc(c, &x, &y);
orig_x = x;
orig_y = y;
pos = (x + cols * y) * 2; /* Update cursor position */
outb_p(14, vidport);
outb_p(0xff & (pos >> 9), vidport+1);
outb_p(15, vidport);
outb_p(0xff & (pos >> 1), vidport+1);
}
static void video_puts(struct stdio_dev *dev, const char *s)
{
int x, y, pos;
char c;
x = orig_x;
y = orig_y;
while ((c = *s++) != '\0')
__video_putc(c, &x, &y);
orig_x = x;
orig_y = y;
pos = (x + cols * y) * 2; /* Update cursor position */
outb_p(14, vidport);
outb_p(0xff & (pos >> 9), vidport+1);
outb_p(15, vidport);
outb_p(0xff & (pos >> 1), vidport+1);
}
int video_init(void)
{
u16 pos;
static struct stdio_dev vga_dev;
static struct stdio_dev kbd_dev;
vidmem = (char *) 0xb8000;
vidport = 0x3d4;
lines = 25;
cols = 80;
outb_p(14, vidport);
pos = inb_p(vidport+1);
pos <<= 8;
outb_p(15, vidport);
pos |= inb_p(vidport+1);
orig_x = pos%cols;
orig_y = pos/cols;
#if 0
printf("pos %x %d %d\n", pos, orig_x, orig_y);
#endif
if (orig_y > lines)
orig_x = orig_y = 0;
memset(&vga_dev, 0, sizeof(vga_dev));
strcpy(vga_dev.name, "vga");
vga_dev.ext = 0;
vga_dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_SYSTEM;
vga_dev.putc = video_putc; /* 'putc' function */
vga_dev.puts = video_puts; /* 'puts' function */
if (stdio_register(&vga_dev) == 0)
return 1;
if (i8042_kbd_init())
return 1;
memset(&kbd_dev, 0, sizeof(kbd_dev));
strcpy(kbd_dev.name, "kbd");
kbd_dev.ext = 0;
kbd_dev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
kbd_dev.tstc = i8042_tstc; /* 'tstc' function */
kbd_dev.getc = i8042_getc; /* 'getc' function */
if (stdio_register(&kbd_dev) == 0)
return 1;
return 0;
}
int drv_video_init(void)
{
return video_init();
}
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