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-rw-r--r--arch/x86/lib/video.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/arch/x86/lib/video.c b/arch/x86/lib/video.c
new file mode 100644
index 0000000..b29075c
--- /dev/null
+++ b/arch/x86/lib/video.c
@@ -0,0 +1,229 @@
+/*
+ * (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();
+}