PERFORCE change 76673 for review
Marcel Moolenaar
marcel at FreeBSD.org
Sat May 7 21:49:42 PDT 2005
http://perforce.freebsd.org/chv.cgi?CH=76673
Change 76673 by marcel at marcel_nfs on 2005/05/08 04:49:02
Initialization step 1: disable sync signals
Affected files ...
.. //depot/projects/tty/sys/dev/vga/vga.c#5 edit
Differences ...
==== //depot/projects/tty/sys/dev/vga/vga.c#5 (text+ko) ====
@@ -37,6 +37,12 @@
#include <dev/ic/vga.h>
#include <dev/vga/vga.h>
+/* Convenience macros. */
+#define CRTC_READ(sc, reg) \
+ bus_space_read_1(sc->vga_crtc.bst, sc->vga_crtc.bsh, reg)
+#define CRTC_WRITE(sc, reg, val) \
+ bus_space_write_1(sc->vga_crtc.bst, sc->vga_crtc.bsh, reg, val)
+
struct vga_softc vga_console;
devclass_t vga_devclass;
char vga_device_name[] = "vga";
@@ -52,6 +58,7 @@
vga_init(struct vga_softc *sc)
{
int error;
+ uint8_t x;
sc->vga_screen = sc->vga_fb;
error = bus_space_subregion(sc->vga_fb.bst, sc->vga_fb.bsh,
@@ -59,6 +66,11 @@
if (error)
return (error);
+ /* Disable the sync. signals. */
+ CRTC_WRITE(sc, VGA_CRTC_ADDRESS, VGA_CRTC_MODE_CONTROL);
+ x = CRTC_READ(sc, VGA_CRTC_DATA);
+ CRTC_WRITE(sc, VGA_CRTC_DATA, x & ~VGA_CRTC_MC_HR);
+
/* TODO -- set the VGA adapter in 640x480x16 mode */
sc->vga_enable = 1;
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