Commit e4c690e0 authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Linus Torvalds

fb: add support for foreign endianness

Add support for the framebuffers with non-native endianness.  This is done via
FBINFO_FOREIGN_ENDIAN flag that will be used by the drivers.  Depending on the
host endianness this flag will be overwritten by FBINFO_BE_MATH internal flag,
or cleared.

Tested to work on MPC8360E-RDK (BE) + Fujitsu MINT framebuffer (LE).
Signed-off-by: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: <Valdis.Kletnieks@vt.edu>
Cc: Clemens Koller <clemens.koller@anagramm.de>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6b745b6f
......@@ -139,6 +139,30 @@ config FB_SYS_IMAGEBLIT
blitting. This is used by drivers that don't provide their own
(accelerated) version and the framebuffer is in system RAM.
menuconfig FB_FOREIGN_ENDIAN
bool "Framebuffer foreign endianness support"
depends on FB
---help---
This menu will let you enable support for the framebuffers with
non-native endianness (e.g. Little-Endian framebuffer on a
Big-Endian machine). Most probably you don't have such hardware,
so it's safe to say "n" here.
choice
prompt "Choice endianness support"
depends on FB_FOREIGN_ENDIAN
config FB_BOTH_ENDIAN
bool "Support for Big- and Little-Endian framebuffers"
config FB_BIG_ENDIAN
bool "Support for Big-Endian framebuffers only"
config FB_LITTLE_ENDIAN
bool "Support for Little-Endian framebuffers only"
endchoice
config FB_SYS_FOPS
tristate
depends on FB
......
......@@ -44,15 +44,16 @@
*/
static void
bitcpy(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem *src,
int src_idx, int bits, unsigned n, u32 bswapmask)
bitcpy(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
const unsigned long __iomem *src, int src_idx, int bits,
unsigned n, u32 bswapmask)
{
unsigned long first, last;
int const shift = dst_idx-src_idx;
int left, right;
first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
if (!shift) {
// Same alignment for source and dest
......@@ -202,8 +203,9 @@ bitcpy(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem *src
*/
static void
bitcpy_rev(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem *src,
int src_idx, int bits, unsigned n, u32 bswapmask)
bitcpy_rev(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
const unsigned long __iomem *src, int src_idx, int bits,
unsigned n, u32 bswapmask)
{
unsigned long first, last;
int shift;
......@@ -221,8 +223,9 @@ bitcpy_rev(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem
shift = dst_idx-src_idx;
first = fb_shifted_pixels_mask_long(bits - 1 - dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long(bits - 1 - ((dst_idx-n) % bits), bswapmask);
first = fb_shifted_pixels_mask_long(p, bits - 1 - dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long(p, bits - 1 - ((dst_idx-n) % bits),
bswapmask);
if (!shift) {
// Same alignment for source and dest
......@@ -404,7 +407,7 @@ void cfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
dst_idx &= (bytes - 1);
src += src_idx >> (ffs(bits) - 1);
src_idx &= (bytes - 1);
bitcpy_rev(dst, dst_idx, src, src_idx, bits,
bitcpy_rev(p, dst, dst_idx, src, src_idx, bits,
width*p->var.bits_per_pixel, bswapmask);
}
} else {
......@@ -413,7 +416,7 @@ void cfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
dst_idx &= (bytes - 1);
src += src_idx >> (ffs(bits) - 1);
src_idx &= (bytes - 1);
bitcpy(dst, dst_idx, src, src_idx, bits,
bitcpy(p, dst, dst_idx, src, src_idx, bits,
width*p->var.bits_per_pixel, bswapmask);
dst_idx += bits_per_line;
src_idx += bits_per_line;
......
......@@ -36,16 +36,16 @@
*/
static void
bitfill_aligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
unsigned n, int bits, u32 bswapmask)
bitfill_aligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
unsigned long pat, unsigned n, int bits, u32 bswapmask)
{
unsigned long first, last;
if (!n)
return;
first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
if (dst_idx+n <= bits) {
// Single word
......@@ -93,16 +93,16 @@ bitfill_aligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
*/
static void
bitfill_unaligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
int left, int right, unsigned n, int bits)
bitfill_unaligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
unsigned long pat, int left, int right, unsigned n, int bits)
{
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
// Single word
......@@ -147,8 +147,9 @@ bitfill_unaligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
* Aligned pattern invert using 32/64-bit memory accesses
*/
static void
bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
unsigned n, int bits, u32 bswapmask)
bitfill_aligned_rev(struct fb_info *p, unsigned long __iomem *dst,
int dst_idx, unsigned long pat, unsigned n, int bits,
u32 bswapmask)
{
unsigned long val = pat, dat;
unsigned long first, last;
......@@ -156,8 +157,8 @@ bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
if (!n)
return;
first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
if (dst_idx+n <= bits) {
// Single word
......@@ -217,16 +218,17 @@ bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
*/
static void
bitfill_unaligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
int left, int right, unsigned n, int bits)
bitfill_unaligned_rev(struct fb_info *p, unsigned long __iomem *dst,
int dst_idx, unsigned long pat, int left, int right,
unsigned n, int bits)
{
unsigned long first, last, dat;
if (!n)
return;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
// Single word
......@@ -306,7 +308,8 @@ void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
p->fbops->fb_sync(p);
if (!left) {
u32 bswapmask = fb_compute_bswapmask(p);
void (*fill_op32)(unsigned long __iomem *dst, int dst_idx,
void (*fill_op32)(struct fb_info *p,
unsigned long __iomem *dst, int dst_idx,
unsigned long pat, unsigned n, int bits,
u32 bswapmask) = NULL;
......@@ -325,16 +328,17 @@ void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
while (height--) {
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bits - 1);
fill_op32(dst, dst_idx, pat, width*bpp, bits, bswapmask);
fill_op32(p, dst, dst_idx, pat, width*bpp, bits,
bswapmask);
dst_idx += p->fix.line_length*8;
}
} else {
int right;
int r;
int rot = (left-dst_idx) % bpp;
void (*fill_op)(unsigned long __iomem *dst, int dst_idx,
unsigned long pat, int left, int right,
unsigned n, int bits) = NULL;
void (*fill_op)(struct fb_info *p, unsigned long __iomem *dst,
int dst_idx, unsigned long pat, int left,
int right, unsigned n, int bits) = NULL;
/* rotate pattern to correct start position */
pat = pat << rot | pat >> (bpp-rot);
......@@ -355,7 +359,7 @@ void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
while (height--) {
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bits - 1);
fill_op(dst, dst_idx, pat, left, right,
fill_op(p, dst, dst_idx, pat, left, right,
width*bpp, bits);
r = (p->fix.line_length*8) % bpp;
pat = pat << (bpp-r) | pat >> r;
......
......@@ -43,30 +43,26 @@
#define DPRINTK(fmt, args...)
#endif
static const u32 cfb_tab8[] = {
#if defined(__BIG_ENDIAN)
static const u32 cfb_tab8_be[] = {
0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
0xffff0000,0xffff00ff,0xffffff00,0xffffffff
#elif defined(__LITTLE_ENDIAN)
};
static const u32 cfb_tab8_le[] = {
0x00000000,0xff000000,0x00ff0000,0xffff0000,
0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00,
0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff,
0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff
#else
#error FIXME: No endianness??
#endif
};
static const u32 cfb_tab16[] = {
#if defined(__BIG_ENDIAN)
static const u32 cfb_tab16_be[] = {
0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
#elif defined(__LITTLE_ENDIAN)
};
static const u32 cfb_tab16_le[] = {
0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
#else
#error FIXME: No endianness??
#endif
};
static const u32 cfb_tab32[] = {
......@@ -98,7 +94,8 @@ static inline void color_imageblit(const struct fb_image *image,
val = 0;
if (start_index) {
u32 start_mask = ~fb_shifted_pixels_mask_u32(start_index, bswapmask);
u32 start_mask = ~fb_shifted_pixels_mask_u32(p,
start_index, bswapmask);
val = FB_READL(dst) & start_mask;
shift = start_index;
}
......@@ -108,20 +105,21 @@ static inline void color_imageblit(const struct fb_image *image,
color = palette[*src];
else
color = *src;
color <<= FB_LEFT_POS(bpp);
val |= FB_SHIFT_HIGH(color, shift ^ bswapmask);
color <<= FB_LEFT_POS(p, bpp);
val |= FB_SHIFT_HIGH(p, color, shift ^ bswapmask);
if (shift >= null_bits) {
FB_WRITEL(val, dst++);
val = (shift == null_bits) ? 0 :
FB_SHIFT_LOW(color, 32 - shift);
FB_SHIFT_LOW(p, color, 32 - shift);
}
shift += bpp;
shift &= (32 - 1);
src++;
}
if (shift) {
u32 end_mask = fb_shifted_pixels_mask_u32(shift, bswapmask);
u32 end_mask = fb_shifted_pixels_mask_u32(p, shift,
bswapmask);
FB_WRITEL((FB_READL(dst) & end_mask) | val, dst);
}
......@@ -152,8 +150,8 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
u32 bswapmask = fb_compute_bswapmask(p);
dst2 = (u32 __iomem *) dst1;
fgcolor <<= FB_LEFT_POS(bpp);
bgcolor <<= FB_LEFT_POS(bpp);
fgcolor <<= FB_LEFT_POS(p, bpp);
bgcolor <<= FB_LEFT_POS(p, bpp);
for (i = image->height; i--; ) {
shift = val = 0;
......@@ -164,7 +162,8 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
/* write leading bits */
if (start_index) {
u32 start_mask = ~fb_shifted_pixels_mask_u32(start_index, bswapmask);
u32 start_mask = ~fb_shifted_pixels_mask_u32(p,
start_index, bswapmask);
val = FB_READL(dst) & start_mask;
shift = start_index;
}
......@@ -172,13 +171,13 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
while (j--) {
l--;
color = (*s & (1 << l)) ? fgcolor : bgcolor;
val |= FB_SHIFT_HIGH(color, shift ^ bswapmask);
val |= FB_SHIFT_HIGH(p, color, shift ^ bswapmask);
/* Did the bitshift spill bits to the next long? */
if (shift >= null_bits) {
FB_WRITEL(val, dst++);
val = (shift == null_bits) ? 0 :
FB_SHIFT_LOW(color,32 - shift);
FB_SHIFT_LOW(p, color, 32 - shift);
}
shift += bpp;
shift &= (32 - 1);
......@@ -187,7 +186,8 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
/* write trailing bits */
if (shift) {
u32 end_mask = fb_shifted_pixels_mask_u32(shift, bswapmask);
u32 end_mask = fb_shifted_pixels_mask_u32(p, shift,
bswapmask);
FB_WRITEL((FB_READL(dst) & end_mask) | val, dst);
}
......@@ -226,10 +226,10 @@ static inline void fast_imageblit(const struct fb_image *image, struct fb_info *
switch (bpp) {
case 8:
tab = cfb_tab8;
tab = fb_be_math(p) ? cfb_tab8_be : cfb_tab8_le;
break;
case 16:
tab = cfb_tab16;
tab = fb_be_math(p) ? cfb_tab16_be : cfb_tab16_le;
break;
case 32:
default:
......
......@@ -94,41 +94,44 @@ static inline unsigned long fb_rev_pixels_in_long(unsigned long val,
return val;
}
static inline u32 fb_shifted_pixels_mask_u32(u32 index, u32 bswapmask)
static inline u32 fb_shifted_pixels_mask_u32(struct fb_info *p, u32 index,
u32 bswapmask)
{
u32 mask;
if (!bswapmask) {
mask = FB_SHIFT_HIGH(~(u32)0, index);
mask = FB_SHIFT_HIGH(p, ~(u32)0, index);
} else {
mask = 0xff << FB_LEFT_POS(8);
mask = FB_SHIFT_LOW(mask, index & (bswapmask)) & mask;
mask = FB_SHIFT_HIGH(mask, index & ~(bswapmask));
mask = 0xff << FB_LEFT_POS(p, 8);
mask = FB_SHIFT_LOW(p, mask, index & (bswapmask)) & mask;
mask = FB_SHIFT_HIGH(p, mask, index & ~(bswapmask));
#if defined(__i386__) || defined(__x86_64__)
/* Shift argument is limited to 0 - 31 on x86 based CPU's */
if(index + bswapmask < 32)
#endif
mask |= FB_SHIFT_HIGH(~(u32)0,
mask |= FB_SHIFT_HIGH(p, ~(u32)0,
(index + bswapmask) & ~(bswapmask));
}
return mask;
}
static inline unsigned long fb_shifted_pixels_mask_long(u32 index, u32 bswapmask)
static inline unsigned long fb_shifted_pixels_mask_long(struct fb_info *p,
u32 index,
u32 bswapmask)
{
unsigned long mask;
if (!bswapmask) {
mask = FB_SHIFT_HIGH(~0UL, index);
mask = FB_SHIFT_HIGH(p, ~0UL, index);
} else {
mask = 0xff << FB_LEFT_POS(8);
mask = FB_SHIFT_LOW(mask, index & (bswapmask)) & mask;
mask = FB_SHIFT_HIGH(mask, index & ~(bswapmask));
mask = 0xff << FB_LEFT_POS(p, 8);
mask = FB_SHIFT_LOW(p, mask, index & (bswapmask)) & mask;
mask = FB_SHIFT_HIGH(p, mask, index & ~(bswapmask));
#if defined(__i386__) || defined(__x86_64__)
/* Shift argument is limited to 0 - 31 on x86 based CPU's */
if(index + bswapmask < BITS_PER_LONG)
#endif
mask |= FB_SHIFT_HIGH(~0UL,
mask |= FB_SHIFT_HIGH(p, ~0UL,
(index + bswapmask) & ~(bswapmask));
}
return mask;
......@@ -158,8 +161,8 @@ static inline unsigned long fb_rev_pixels_in_long(unsigned long val,
return val;
}
#define fb_shifted_pixels_mask_u32(i, b) FB_SHIFT_HIGH(~(u32)0, (i))
#define fb_shifted_pixels_mask_long(i, b) FB_SHIFT_HIGH(~0UL, (i))
#define fb_shifted_pixels_mask_u32(p, i, b) FB_SHIFT_HIGH((p), ~(u32)0, (i))
#define fb_shifted_pixels_mask_long(p, i, b) FB_SHIFT_HIGH((p), ~0UL, (i))
#define fb_compute_bswapmask(...) 0
#endif /* CONFIG_FB_CFB_REV_PIXELS_IN_BYTE */
......
......@@ -1352,6 +1352,32 @@ static const struct file_operations fb_fops = {
struct class *fb_class;
EXPORT_SYMBOL(fb_class);
static int fb_check_foreignness(struct fb_info *fi)
{
const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
#ifdef __BIG_ENDIAN
fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
#else
fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
#endif /* __BIG_ENDIAN */
if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
"support this framebuffer\n", fi->fix.id);
return -ENOSYS;
} else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
"support this framebuffer\n", fi->fix.id);
return -ENOSYS;
}
return 0;
}
/**
* register_framebuffer - registers a frame buffer device
* @fb_info: frame buffer info structure
......@@ -1371,6 +1397,10 @@ register_framebuffer(struct fb_info *fb_info)
if (num_registered_fb == FB_MAX)
return -ENXIO;
if (fb_check_foreignness(fb_info))
return -ENOSYS;
num_registered_fb++;
for (i = 0 ; i < FB_MAX; i++)
if (!registered_fb[i])
......
......@@ -26,15 +26,15 @@
*/
static void
bitcpy(unsigned long *dst, int dst_idx, const unsigned long *src,
int src_idx, int bits, unsigned n)
bitcpy(struct fb_info *p, unsigned long *dst, int dst_idx,
const unsigned long *src, int src_idx, int bits, unsigned n)
{
unsigned long first, last;
int const shift = dst_idx-src_idx;
int left, right;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (!shift) {
/* Same alignment for source and dest */
......@@ -167,8 +167,8 @@ bitcpy(unsigned long *dst, int dst_idx, const unsigned long *src,
*/
static void
bitcpy_rev(unsigned long *dst, int dst_idx, const unsigned long *src,
int src_idx, int bits, unsigned n)
bitcpy_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
const unsigned long *src, int src_idx, int bits, unsigned n)
{
unsigned long first, last;
int shift;
......@@ -186,8 +186,8 @@ bitcpy_rev(unsigned long *dst, int dst_idx, const unsigned long *src,
shift = dst_idx-src_idx;
first = FB_SHIFT_LOW(~0UL, bits - 1 - dst_idx);
last = ~(FB_SHIFT_LOW(~0UL, bits - 1 - ((dst_idx-n) % bits)));
first = FB_SHIFT_LOW(p, ~0UL, bits - 1 - dst_idx);
last = ~(FB_SHIFT_LOW(p, ~0UL, bits - 1 - ((dst_idx-n) % bits)));
if (!shift) {
/* Same alignment for source and dest */
......@@ -353,7 +353,7 @@ void sys_copyarea(struct fb_info *p, const struct fb_copyarea *area)
dst_idx &= (bytes - 1);
src += src_idx >> (ffs(bits) - 1);
src_idx &= (bytes - 1);
bitcpy_rev(dst, dst_idx, src, src_idx, bits,
bitcpy_rev(p, dst, dst_idx, src, src_idx, bits,
width*p->var.bits_per_pixel);
}
} else {
......@@ -362,7 +362,7 @@ void sys_copyarea(struct fb_info *p, const struct fb_copyarea *area)
dst_idx &= (bytes - 1);
src += src_idx >> (ffs(bits) - 1);
src_idx &= (bytes - 1);
bitcpy(dst, dst_idx, src, src_idx, bits,
bitcpy(p, dst, dst_idx, src, src_idx, bits,
width*p->var.bits_per_pixel);
dst_idx += bits_per_line;
src_idx += bits_per_line;
......
......@@ -22,16 +22,16 @@
*/
static void
bitfill_aligned(unsigned long *dst, int dst_idx, unsigned long pat,
unsigned n, int bits)
bitfill_aligned(struct fb_info *p, unsigned long *dst, int dst_idx,
unsigned long pat, unsigned n, int bits)
{
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
/* Single word */
......@@ -78,16 +78,16 @@ bitfill_aligned(unsigned long *dst, int dst_idx, unsigned long pat,
*/
static void
bitfill_unaligned(unsigned long *dst, int dst_idx, unsigned long pat,
int left, int right, unsigned n, int bits)
bitfill_unaligned(struct fb_info *p, unsigned long *dst, int dst_idx,
unsigned long pat, int left, int right, unsigned n, int bits)
{
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
/* Single word */
......@@ -132,8 +132,8 @@ bitfill_unaligned(unsigned long *dst, int dst_idx, unsigned long pat,
* Aligned pattern invert using 32/64-bit memory accesses
*/
static void
bitfill_aligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
unsigned n, int bits)
bitfill_aligned_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
unsigned long pat, unsigned n, int bits)
{
unsigned long val = pat;
unsigned long first, last;
......@@ -141,8 +141,8 @@ bitfill_aligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
if (!n)
return;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
/* Single word */
......@@ -188,16 +188,17 @@ bitfill_aligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
*/
static void
bitfill_unaligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
int left, int right, unsigned n, int bits)
bitfill_unaligned_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
unsigned long pat, int left, int right, unsigned n,
int bits)
{
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
/* Single word */
......@@ -267,9 +268,9 @@ void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
if (p->fbops->fb_sync)
p->fbops->fb_sync(p);
if (!left) {
void (*fill_op32)(unsigned long *dst, int dst_idx,
unsigned long pat, unsigned n, int bits) =
NULL;
void (*fill_op32)(struct fb_info *p, unsigned long *dst,
int dst_idx, unsigned long pat, unsigned n,
int bits) = NULL;
switch (rect->rop) {
case ROP_XOR:
......@@ -287,16 +288,16 @@ void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
while (height--) {
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bits - 1);
fill_op32(dst, dst_idx, pat, width*bpp, bits);
fill_op32(p, dst, dst_idx, pat, width*bpp, bits);
dst_idx += p->fix.line_length*8;
}
} else {
int right;
int r;
int rot = (left-dst_idx) % bpp;
void (*fill_op)(unsigned long *dst, int dst_idx,
unsigned long pat, int left, int right,
unsigned n, int bits) = NULL;
void (*fill_op)(struct fb_info *p, unsigned long *dst,
int dst_idx, unsigned long pat, int left,
int right, unsigned n, int bits) = NULL;
/* rotate pattern to correct start position */
pat = pat << rot | pat >> (bpp-rot);
......@@ -318,7 +319,7 @@ void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
while (height--) {
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bits - 1);
fill_op(dst, dst_idx, pat, left, right,
fill_op(p, dst, dst_idx, pat, left, right,
width*bpp, bits);
r = (p->fix.line_length*8) % bpp;
pat = pat << (bpp-r) | pat >> r;
......
......@@ -23,30 +23,26 @@
#define DPRINTK(fmt, args...)
#endif
static const u32 cfb_tab8[] = {
#if defined(__BIG_ENDIAN)
static const u32 cfb_tab8_be[] = {
0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
0xffff0000,0xffff00ff,0xffffff00,0xffffffff
#elif defined(__LITTLE_ENDIAN)
};
static const u32 cfb_tab8_le[] = {
0x00000000,0xff000000,0x00ff0000,0xffff0000,
0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00,
0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff,
0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff
#else
#error FIXME: No endianness??
#endif
};
static const u32 cfb_tab16[] = {
#if defined(__BIG_ENDIAN)
static const u32 cfb_tab16_be[] = {
0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
#elif defined(__LITTLE_ENDIAN)
};
static const u32 cfb_tab16_le[] = {
0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
#else
#error FIXME: No endianness??
#endif
};
static const u32 cfb_tab32[] = {
......@@ -72,7 +68,7 @@ static void color_imageblit(const struct fb_image *image, struct fb_info *p,
val = 0;
if (start_index) {
u32 start_mask = ~(FB_SHIFT_HIGH(~(u32)0,
u32 start_mask = ~(FB_SHIFT_HIGH(p, ~(u32)0,
start_index));
val = *dst & start_mask;
shift = start_index;
......@@ -83,20 +79,20 @@ static void color_imageblit(const struct fb_image *image, struct fb_info *p,
color = palette[*src];
else
color = *src;
color <<= FB_LEFT_POS(bpp);
val |= FB_SHIFT_HIGH(color, shift);
color <<= FB_LEFT_POS(p, bpp);
val |= FB_SHIFT_HIGH(p, color, shift);
if (shift >= null_bits) {
*dst++ = val;
val = (shift == null_bits) ? 0 :
FB_SHIFT_LOW(color, 32 - shift);
FB_SHIFT_LOW(p, color, 32 - shift);
}
shift += bpp;
shift &= (32 - 1);
src++;
}
if (shift) {
u32 end_mask = FB_SHIFT_HIGH(~(u32)0, shift);
u32 end_mask = FB_SHIFT_HIGH(p, ~(u32)0, shift);
*dst &= end_mask;
*dst |= val;
......@@ -125,8 +121,8 @@ static void slow_imageblit(const struct fb_image *image, struct fb_info *p,
u32 i, j, l;
dst2 = dst1;
fgcolor <<= FB_LEFT_POS(bpp);
bgcolor <<= FB_LEFT_POS(bpp);
fgcolor <<= FB_LEFT_POS(p, bpp);
bgcolor <<= FB_LEFT_POS(p, bpp);
for (i = image->height; i--; ) {
shift = val = 0;
......@@ -137,7 +133,8 @@ static void slow_imageblit(const struct fb_image *image, struct fb_info *p,
/* write leading bits */
if (start_index) {
u32 start_mask = ~(FB_SHIFT_HIGH(~(u32)0,start_index));
u32 start_mask = ~(FB_SHIFT_HIGH(p, ~(u32)0,
start_index));
val = *dst & start_mask;
shift = start_index;
}
......@@ -145,13 +142,13 @@ static void slow_imageblit(const struct fb_image *image, struct fb_info *p,
while (j--) {
l--;
color = (*s & (1 << l)) ? fgcolor : bgcolor;
val |= FB_SHIFT_HIGH(color, shift);
val |= FB_SHIFT_HIGH(p, color, shift);
/* Did the bitshift spill bits to the next long? */
if (shift >= null_bits) {
*dst++ = val;
val = (shift == null_bits) ? 0 :
FB_SHIFT_LOW(color,32 - shift);
FB_SHIFT_LOW(p, color, 32 - shift);
}
shift += bpp;
shift &= (32 - 1);
......@@ -160,7 +157,7 @@ static void slow_imageblit(const struct fb_image *image, struct fb_info *p,
/* write trailing bits */
if (shift) {
u32 end_mask = FB_SHIFT_HIGH(~(u32)0, shift);
u32 end_mask = FB_SHIFT_HIGH(p, ~(u32)0, shift);
*dst &= end_mask;
*dst |= val;
......@@ -199,10 +196,10 @@ static void fast_imageblit(const struct fb_image *image, struct fb_info *p,
switch (bpp) {
case 8:
tab = cfb_tab8;
tab = fb_be_math(p) ? cfb_tab8_be : cfb_tab8_le;
break;
case 16:
tab = cfb_tab16;
tab = fb_be_math(p) ? cfb_tab16_be : cfb_tab16_le;
break;
case 32:
default:
......
......@@ -791,6 +791,17 @@ struct fb_tile_ops {
*/
#define FBINFO_MISC_ALWAYS_SETPAR 0x40000
/*
* Host and GPU endianness differ.
*/
#define FBINFO_FOREIGN_ENDIAN 0x100000
/*
* Big endian math. This is the same flags as above, but with different
* meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
* and host endianness. Drivers should not use this flag.
*/
#define FBINFO_BE_MATH 0x100000
struct fb_info {
int node;
int flags;
......@@ -899,15 +910,11 @@ struct fb_info {
#endif
#if defined (__BIG_ENDIAN)
#define FB_LEFT_POS(bpp) (32 - bpp)
#define FB_SHIFT_HIGH(val, bits) ((val) >> (bits))
#define FB_SHIFT_LOW(val, bits) ((val) << (bits))
#else
#define FB_LEFT_POS(bpp) (0)
#define FB_SHIFT_HIGH(val, bits) ((val) << (bits))
#define FB_SHIFT_LOW(val, bits) ((val) >> (bits))
#endif
#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
(val) << (bits))
#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
(val) >> (bits))
/*
* `Generic' versions of the frame buffer device operations
......@@ -970,6 +977,25 @@ extern void fb_deferred_io_cleanup(struct fb_info *info);
extern int fb_deferred_io_fsync(struct file *file, struct dentry *dentry,
int datasync);
static inline bool fb_be_math(struct fb_info *info)
{
#ifdef CONFIG_FB_FOREIGN_ENDIAN
#if defined(CONFIG_FB_BOTH_ENDIAN)
return info->flags & FBINFO_BE_MATH;
#elif defined(CONFIG_FB_BIG_ENDIAN)
return true;
#elif defined(CONFIG_FB_LITTLE_ENDIAN)
return false;
#endif /* CONFIG_FB_BOTH_ENDIAN */
#else
#ifdef __BIG_ENDIAN
return true;
#else
return false;
#endif /* __BIG_ENDIAN */
#endif /* CONFIG_FB_FOREIGN_ENDIAN */
}
/* drivers/video/fbsysfs.c */
extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
extern void framebuffer_release(struct fb_info *info);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment