diff options
Diffstat (limited to 'arch/i386/lib/video.c')
| -rw-r--r-- | arch/i386/lib/video.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/arch/i386/lib/video.c b/arch/i386/lib/video.c new file mode 100644 index 0000000..c58ed10 --- /dev/null +++ b/arch/i386/lib/video.c @@ -0,0 +1,237 @@ +/* + * (C) Copyright 2002 + * Daniel Engström, Omicron Ceti AB, daniel@omicron.se + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <pci.h> +#include <stdio_dev.h> +#include <i8042.h> +#include <asm/ptrace.h> +#include <asm/realmode.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(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(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 */ + vga_dev.tstc = NULL; /* 'tstc' function */ + vga_dev.getc = NULL; /* 'getc' 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.putc = NULL; /* 'putc' function */ + kbd_dev.puts = NULL; /* 'puts' function */ + 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) +{ + if (video_bios_init()) { + return 1; + } + + return video_init(); +} |