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authorBrent Cook <busterb@gmail.com>2010-12-31 08:56:50 +0300
committerPaul Mundt <lethal@linux-sh.org>2011-01-06 09:48:13 +0300
commit529ed806d4540d23ca2f68b28c3715d1566fc3ac (patch)
treeb8287b72e0a832496eb49fc77e17add713273c55
parente045da7d835a28950543f5f10f0cb1905ca9bbaf (diff)
downloadlinux-529ed806d4540d23ca2f68b28c3715d1566fc3ac.tar.xz
video: Fix the HGA framebuffer driver
Resurrected some old hardware and fixed up the hgafb driver to work again. Only tested with fbcon, since most fbdev-based software appears to only support 12bpp and up. It does not appear that this driver has worked for at least the entire 2.6.x series, perhaps since 2002. Hercules graphics hardware uses packed pixels horizontally, but rows are not linear. In other words, the pixels are not packed vertically. This means that custom imageblit, fillrect and copyarea need to be written specific to the hardware. * Removed the experimental acceleration option, since it is required for the hardware to work. * Fixed imageblit to work with fb_image's wider than 8 pixels. * Updated configuration text (HGA hardware is from 1984) Signed-off-by: Brent Cook <busterb@gmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
-rw-r--r--drivers/video/Kconfig14
-rw-r--r--drivers/video/hgafb.c22
2 files changed, 11 insertions, 25 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index e231041a5e33..fdddf58bdaf5 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -824,24 +824,14 @@ config FB_N411
config FB_HGA
tristate "Hercules mono graphics support"
depends on FB && X86
- select FB_CFB_FILLRECT
- select FB_CFB_COPYAREA
- select FB_CFB_IMAGEBLIT
help
Say Y here if you have a Hercules mono graphics card.
To compile this driver as a module, choose M here: the
module will be called hgafb.
- As this card technology is 15 years old, most people will answer N
- here.
-
-config FB_HGA_ACCEL
- bool "Hercules mono Acceleration functions (EXPERIMENTAL)"
- depends on FB_HGA && EXPERIMENTAL
- ---help---
- This will compile the Hercules mono graphics with
- acceleration functions.
+ As this card technology is at least 25 years old,
+ most people will answer N here.
config FB_SGIVW
tristate "SGI Visual Workstation framebuffer support"
diff --git a/drivers/video/hgafb.c b/drivers/video/hgafb.c
index af8f0f2cc782..4052718eefaa 100644
--- a/drivers/video/hgafb.c
+++ b/drivers/video/hgafb.c
@@ -454,7 +454,6 @@ static int hgafb_blank(int blank_mode, struct fb_info *info)
/*
* Accel functions
*/
-#ifdef CONFIG_FB_HGA_ACCEL
static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
u_int rows, y;
@@ -466,7 +465,7 @@ static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
dest = rowaddr(info, y) + (rect->dx >> 3);
switch (rect->rop) {
case ROP_COPY:
- //fb_memset(dest, rect->color, (rect->width >> 3));
+ memset_io(dest, rect->color, (rect->width >> 3));
break;
case ROP_XOR:
fb_writeb(~(fb_readb(dest)), dest);
@@ -488,7 +487,7 @@ static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
for (rows = area->height; rows--; ) {
src = rowaddr(info, y1) + (area->sx >> 3);
dest = rowaddr(info, y2) + (area->dx >> 3);
- //fb_memmove(dest, src, (area->width >> 3));
+ memmove(dest, src, (area->width >> 3));
y1++;
y2++;
}
@@ -499,7 +498,7 @@ static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
for (rows = area->height; rows--;) {
src = rowaddr(info, y1) + (area->sx >> 3);
dest = rowaddr(info, y2) + (area->dx >> 3);
- //fb_memmove(dest, src, (area->width >> 3));
+ memmove(dest, src, (area->width >> 3));
y1--;
y2--;
}
@@ -511,20 +510,17 @@ static void hgafb_imageblit(struct fb_info *info, const struct fb_image *image)
u8 __iomem *dest;
u8 *cdat = (u8 *) image->data;
u_int rows, y = image->dy;
+ u_int x;
u8 d;
for (rows = image->height; rows--; y++) {
- d = *cdat++;
- dest = rowaddr(info, y) + (image->dx >> 3);
- fb_writeb(d, dest);
+ for (x = 0; x < image->width; x+= 8) {
+ d = *cdat++;
+ dest = rowaddr(info, y) + ((image->dx + x)>> 3);
+ fb_writeb(d, dest);
+ }
}
}
-#else /* !CONFIG_FB_HGA_ACCEL */
-#define hgafb_fillrect cfb_fillrect
-#define hgafb_copyarea cfb_copyarea
-#define hgafb_imageblit cfb_imageblit
-#endif /* CONFIG_FB_HGA_ACCEL */
-
static struct fb_ops hgafb_ops = {
.owner = THIS_MODULE,