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: Anton 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 26 insertions, 26 deletions

diff --git a/drivers/video/cfbimgblt.c b/drivers/video/cfbimgblt.c
index f598907b42a..ff3136bd464 100644
--- a/drivers/video/cfbimgblt.c
+++ b/drivers/video/cfbimgblt.c
@@ -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);
 		}
@@ -223,13 +223,13 @@ static inline void fast_imageblit(const struct fb_image *image, struct fb_info *
 	u32 __iomem *dst;
 	const u32 *tab = NULL;
 	int i, j, k;
-		
+
 	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: