Revision 5885b9b3f030f9b430f6b1c7fa396c885033f2f8 authored by Linus Torvalds on 16 December 2011, 19:14:42 UTC, committed by Linus Torvalds on 16 December 2011, 19:14:42 UTC
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: HDA: Use LPIB Position fix for Intel SCH Poulsbo ALSA: hda: fix mute led polarity for HP laptops with buggy BIOS ALSA: HDA: Set position fix to LPIB for an Atom/Poulsbo based device ASoC: Fix hx4700 error handling to free gpios if snd_soc_register_card fails ASoC: WM8958: correctly show firmware magic on mismatch ASoC: mxs: Add appropriate MODULE_ALIAS() ASoC: mxs: Add missing MODULE_LICENSE("GPL") ASoC: Fix WM8996 24.576MHz clock operation ASoC: Include linux/module.h for smdk2443_wm9710 ASoC: Fix a typo in jive_wm8750 ASoC: Fix build dependency for SND_SOC_JZ4740_CODEC ASoC: Include linux/io.h for jz4740 codec
syscopyarea.c
/*
* Generic Bit Block Transfer for frame buffers located in system RAM with
* packed pixels of any depth.
*
* Based almost entirely from cfbcopyarea.c (which is based almost entirely
* on Geert Uytterhoeven's copyarea routine)
*
* Copyright (C) 2007 Antonino Daplas <adaplas@pol.net>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <asm/types.h>
#include <asm/io.h>
#include "fb_draw.h"
/*
* Generic bitwise copy algorithm
*/
static void
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(p, ~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
if (!shift) {
/* Same alignment for source and dest */
if (dst_idx+n <= bits) {
/* Single word */
if (last)
first &= last;
*dst = comp(*src, *dst, first);
} else {
/* Multiple destination words */
/* Leading bits */
if (first != ~0UL) {
*dst = comp(*src, *dst, first);
dst++;
src++;
n -= bits - dst_idx;
}
/* Main chunk */
n /= bits;
while (n >= 8) {
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
n -= 8;
}
while (n--)
*dst++ = *src++;
/* Trailing bits */
if (last)
*dst = comp(*src, *dst, last);
}
} else {
unsigned long d0, d1;
int m;
/* Different alignment for source and dest */
right = shift & (bits - 1);
left = -shift & (bits - 1);
if (dst_idx+n <= bits) {
/* Single destination word */
if (last)
first &= last;
if (shift > 0) {
/* Single source word */
*dst = comp(*src >> right, *dst, first);
} else if (src_idx+n <= bits) {
/* Single source word */
*dst = comp(*src << left, *dst, first);
} else {
/* 2 source words */
d0 = *src++;
d1 = *src;
*dst = comp(d0 << left | d1 >> right, *dst,
first);
}
} else {
/* Multiple destination words */
/** We must always remember the last value read,
because in case SRC and DST overlap bitwise (e.g.
when moving just one pixel in 1bpp), we always
collect one full long for DST and that might
overlap with the current long from SRC. We store
this value in 'd0'. */
d0 = *src++;
/* Leading bits */
if (shift > 0) {
/* Single source word */
*dst = comp(d0 >> right, *dst, first);
dst++;
n -= bits - dst_idx;
} else {
/* 2 source words */
d1 = *src++;
*dst = comp(d0 << left | *dst >> right, *dst, first);
d0 = d1;
dst++;
n -= bits - dst_idx;
}
/* Main chunk */
m = n % bits;
n /= bits;
while (n >= 4) {
d1 = *src++;
*dst++ = d0 << left | d1 >> right;
d0 = d1;
d1 = *src++;
*dst++ = d0 << left | d1 >> right;
d0 = d1;
d1 = *src++;
*dst++ = d0 << left | d1 >> right;
d0 = d1;
d1 = *src++;
*dst++ = d0 << left | d1 >> right;
d0 = d1;
n -= 4;
}
while (n--) {
d1 = *src++;
*dst++ = d0 << left | d1 >> right;
d0 = d1;
}
/* Trailing bits */
if (last) {
if (m <= right) {
/* Single source word */
*dst = comp(d0 << left, *dst, last);
} else {
/* 2 source words */
d1 = *src;
*dst = comp(d0 << left | d1 >> right,
*dst, last);
}
}
}
}
}
/*
* Generic bitwise copy algorithm, operating backward
*/
static void
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;
dst += (n-1)/bits;
src += (n-1)/bits;
if ((n-1) % bits) {
dst_idx += (n-1) % bits;
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= bits - 1;
src_idx += (n-1) % bits;
src += src_idx >> (ffs(bits) - 1);
src_idx &= bits - 1;
}
shift = dst_idx-src_idx;
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 */
if ((unsigned long)dst_idx+1 >= n) {
/* Single word */
if (last)
first &= last;
*dst = comp(*src, *dst, first);
} else {
/* Multiple destination words */
/* Leading bits */
if (first != ~0UL) {
*dst = comp(*src, *dst, first);
dst--;
src--;
n -= dst_idx+1;
}
/* Main chunk */
n /= bits;
while (n >= 8) {
*dst-- = *src--;
*dst-- = *src--;
*dst-- = *src--;
*dst-- = *src--;
*dst-- = *src--;
*dst-- = *src--;
*dst-- = *src--;
*dst-- = *src--;
n -= 8;
}
while (n--)
*dst-- = *src--;
/* Trailing bits */
if (last)
*dst = comp(*src, *dst, last);
}
} else {
/* Different alignment for source and dest */
int const left = -shift & (bits-1);
int const right = shift & (bits-1);
if ((unsigned long)dst_idx+1 >= n) {
/* Single destination word */
if (last)
first &= last;
if (shift < 0) {
/* Single source word */
*dst = comp(*src << left, *dst, first);
} else if (1+(unsigned long)src_idx >= n) {
/* Single source word */
*dst = comp(*src >> right, *dst, first);
} else {
/* 2 source words */
*dst = comp(*src >> right | *(src-1) << left,
*dst, first);
}
} else {
/* Multiple destination words */
/** We must always remember the last value read,
because in case SRC and DST overlap bitwise (e.g.
when moving just one pixel in 1bpp), we always
collect one full long for DST and that might
overlap with the current long from SRC. We store
this value in 'd0'. */
unsigned long d0, d1;
int m;
d0 = *src--;
/* Leading bits */
if (shift < 0) {
/* Single source word */
*dst = comp(d0 << left, *dst, first);
} else {
/* 2 source words */
d1 = *src--;
*dst = comp(d0 >> right | d1 << left, *dst,
first);
d0 = d1;
}
dst--;
n -= dst_idx+1;
/* Main chunk */
m = n % bits;
n /= bits;
while (n >= 4) {
d1 = *src--;
*dst-- = d0 >> right | d1 << left;
d0 = d1;
d1 = *src--;
*dst-- = d0 >> right | d1 << left;
d0 = d1;
d1 = *src--;
*dst-- = d0 >> right | d1 << left;
d0 = d1;
d1 = *src--;
*dst-- = d0 >> right | d1 << left;
d0 = d1;
n -= 4;
}
while (n--) {
d1 = *src--;
*dst-- = d0 >> right | d1 << left;
d0 = d1;
}
/* Trailing bits */
if (last) {
if (m <= left) {
/* Single source word */
*dst = comp(d0 >> right, *dst, last);
} else {
/* 2 source words */
d1 = *src;
*dst = comp(d0 >> right | d1 << left,
*dst, last);
}
}
}
}
}
void sys_copyarea(struct fb_info *p, const struct fb_copyarea *area)
{
u32 dx = area->dx, dy = area->dy, sx = area->sx, sy = area->sy;
u32 height = area->height, width = area->width;
unsigned long const bits_per_line = p->fix.line_length*8u;
unsigned long *dst = NULL, *src = NULL;
int bits = BITS_PER_LONG, bytes = bits >> 3;
int dst_idx = 0, src_idx = 0, rev_copy = 0;
if (p->state != FBINFO_STATE_RUNNING)
return;
/* if the beginning of the target area might overlap with the end of
the source area, be have to copy the area reverse. */
if ((dy == sy && dx > sx) || (dy > sy)) {
dy += height;
sy += height;
rev_copy = 1;
}
/* split the base of the framebuffer into a long-aligned address and
the index of the first bit */
dst = src = (unsigned long *)((unsigned long)p->screen_base &
~(bytes-1));
dst_idx = src_idx = 8*((unsigned long)p->screen_base & (bytes-1));
/* add offset of source and target area */
dst_idx += dy*bits_per_line + dx*p->var.bits_per_pixel;
src_idx += sy*bits_per_line + sx*p->var.bits_per_pixel;
if (p->fbops->fb_sync)
p->fbops->fb_sync(p);
if (rev_copy) {
while (height--) {
dst_idx -= bits_per_line;
src_idx -= bits_per_line;
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bytes - 1);
src += src_idx >> (ffs(bits) - 1);
src_idx &= (bytes - 1);
bitcpy_rev(p, dst, dst_idx, src, src_idx, bits,
width*p->var.bits_per_pixel);
}
} else {
while (height--) {
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bytes - 1);
src += src_idx >> (ffs(bits) - 1);
src_idx &= (bytes - 1);
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;
}
}
}
EXPORT_SYMBOL(sys_copyarea);
MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
MODULE_DESCRIPTION("Generic copyarea (sys-to-sys)");
MODULE_LICENSE("GPL");
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