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