/* * SiS 300/630/730/540/315/550/650/740 frame buffer driver * for Linux kernels 2.4.x and 2.5.x * * 2D acceleration part * * Based on the X driver's sis300_accel.c which is *     Copyright Xavier Ducoin <x.ducoin@lectra.com> *     Copyright 2002 by Thomas Winischhofer, Vienna, Austria * and sis310_accel.c which is *     Copyright 2002 by Thomas Winischhofer, Vienna, Austria * * Author: Thomas Winischhofer <thomas@winischhofer.net> *			(see http://www.winischhofer.net/ *			for more information and updates) */#include <linux/config.h>#include <linux/version.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/errno.h>#include <linux/string.h>#include <linux/mm.h>#include <linux/tty.h>#include <linux/slab.h>#include <linux/delay.h>#include <linux/fb.h>#include <linux/console.h>#include <linux/selection.h>#include <linux/ioport.h>#include <linux/init.h>#include <linux/pci.h>#include <linux/vt_kern.h>#include <linux/capability.h>#include <linux/fs.h>#include <linux/agp_backend.h>#include <linux/types.h>#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)#include <linux/sisfb.h>#else#include <video/sisfb.h>#endif#include <asm/io.h>#ifdef CONFIG_MTRR#include <asm/mtrr.h>#endif#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)#include <video/fbcon.h>#include <video/fbcon-cfb8.h>#include <video/fbcon-cfb16.h>#include <video/fbcon-cfb24.h>#include <video/fbcon-cfb32.h>#endif#include "osdef.h"#include "vgatypes.h"#include "vstruct.h"#include "sis_accel.h"#include "sis.h"extern struct     video_info ivideo;extern VGA_ENGINE sisvga_engine;extern int sisfb_accel;static const int sisALUConv[] ={    0x00,       /* dest = 0;            0,      GXclear,        0 */    0x88,       /* dest &= src;         DSa,    GXand,          0x1 */    0x44,       /* dest = src & ~dest;  SDna,   GXandReverse,   0x2 */    0xCC,       /* dest = src;          S,      GXcopy,         0x3 */    0x22,       /* dest &= ~src;        DSna,   GXandInverted,  0x4 */    0xAA,       /* dest = dest;         D,      GXnoop,         0x5 */    0x66,       /* dest = ^src;         DSx,    GXxor,          0x6 */    0xEE,       /* dest |= src;         DSo,    GXor,           0x7 */    0x11,       /* dest = ~src & ~dest; DSon,   GXnor,          0x8 */    0x99,       /* dest ^= ~src ;       DSxn,   GXequiv,        0x9 */    0x55,       /* dest = ~dest;        Dn,     GXInvert,       0xA */    0xDD,       /* dest = src|~dest ;   SDno,   GXorReverse,    0xB */    0x33,       /* dest = ~src;         Sn,     GXcopyInverted, 0xC */    0xBB,       /* dest |= ~src;        DSno,   GXorInverted,   0xD */    0x77,       /* dest = ~src|~dest;   DSan,   GXnand,         0xE */    0xFF,       /* dest = 0xFF;         1,      GXset,          0xF */};/* same ROP but with Pattern as Source */static const int sisPatALUConv[] ={    0x00,       /* dest = 0;            0,      GXclear,        0 */    0xA0,       /* dest &= src;         DPa,    GXand,          0x1 */    0x50,       /* dest = src & ~dest;  PDna,   GXandReverse,   0x2 */    0xF0,       /* dest = src;          P,      GXcopy,         0x3 */    0x0A,       /* dest &= ~src;        DPna,   GXandInverted,  0x4 */    0xAA,       /* dest = dest;         D,      GXnoop,         0x5 */    0x5A,       /* dest = ^src;         DPx,    GXxor,          0x6 */    0xFA,       /* dest |= src;         DPo,    GXor,           0x7 */    0x05,       /* dest = ~src & ~dest; DPon,   GXnor,          0x8 */    0xA5,       /* dest ^= ~src ;       DPxn,   GXequiv,        0x9 */    0x55,       /* dest = ~dest;        Dn,     GXInvert,       0xA */    0xF5,       /* dest = src|~dest ;   PDno,   GXorReverse,    0xB */    0x0F,       /* dest = ~src;         Pn,     GXcopyInverted, 0xC */    0xAF,       /* dest |= ~src;        DPno,   GXorInverted,   0xD */    0x5F,       /* dest = ~src|~dest;   DPan,   GXnand,         0xE */    0xFF,       /* dest = 0xFF;         1,      GXset,          0xF */};#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,34)static const unsigned char myrops[] = {   	3, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3   };#endif/* 300 series */static voidSiS300Sync(void){	SiS300Idle}static voidSiS310Sync(void){	SiS310Idle}static voidSiS300SetupForScreenToScreenCopy(int xdir, int ydir, int rop,                                unsigned int planemask, int trans_color){	SiS300SetupDSTColorDepth(ivideo.DstColor);	SiS300SetupSRCPitch(ivideo.video_linelength)	SiS300SetupDSTRect(ivideo.video_linelength, -1)	if(trans_color != -1) {		SiS300SetupROP(0x0A)		SiS300SetupSRCTrans(trans_color)		SiS300SetupCMDFlag(TRANSPARENT_BITBLT)	} else {	        SiS300SetupROP(sisALUConv[rop])	}	if(xdir > 0) {		SiS300SetupCMDFlag(X_INC)	}	if(ydir > 0) {		SiS300SetupCMDFlag(Y_INC)	}}static voidSiS300SubsequentScreenToScreenCopy(int src_x, int src_y, int dst_x, int dst_y,                                int width, int height){	long srcbase, dstbase;	srcbase = dstbase = 0;	if (src_y >= 2048) {		srcbase = ivideo.video_linelength * src_y;		src_y = 0;	}	if (dst_y >= 2048) {		dstbase = ivideo.video_linelength * dst_y;		dst_y = 0;	}	SiS300SetupSRCBase(srcbase);	SiS300SetupDSTBase(dstbase);	if(!(ivideo.CommandReg & X_INC))  {		src_x += width-1;		dst_x += width-1;	}	if(!(ivideo.CommandReg & Y_INC))  {		src_y += height-1;		dst_y += height-1;	}	SiS300SetupRect(width, height)	SiS300SetupSRCXY(src_x, src_y)	SiS300SetupDSTXY(dst_x, dst_y)	SiS300DoCMD}static voidSiS300SetupForSolidFill(int color, int rop, unsigned int planemask){	SiS300SetupPATFG(color)	SiS300SetupDSTRect(ivideo.video_linelength, -1)	SiS300SetupDSTColorDepth(ivideo.DstColor);	SiS300SetupROP(sisPatALUConv[rop])	SiS300SetupCMDFlag(PATFG)}static voidSiS300SubsequentSolidFillRect(int x, int y, int w, int h){	long dstbase;	dstbase = 0;	if(y >= 2048) {		dstbase = ivideo.video_linelength * y;		y = 0;	}	SiS300SetupDSTBase(dstbase)	SiS300SetupDSTXY(x,y)	SiS300SetupRect(w,h)	SiS300SetupCMDFlag(X_INC | Y_INC | BITBLT)	SiS300DoCMD}/* 310/325 series ------------------------------------------------ */static voidSiS310SetupForScreenToScreenCopy(int xdir, int ydir, int rop,                                unsigned int planemask, int trans_color){	SiS310SetupDSTColorDepth(ivideo.DstColor);	SiS310SetupSRCPitch(ivideo.video_linelength)	SiS310SetupDSTRect(ivideo.video_linelength, -1)	if (trans_color != -1) {		SiS310SetupROP(0x0A)		SiS310SetupSRCTrans(trans_color)		SiS310SetupCMDFlag(TRANSPARENT_BITBLT)	} else {	        SiS310SetupROP(sisALUConv[rop])		/* Set command - not needed, both 0 */		/* SiSSetupCMDFlag(BITBLT | SRCVIDEO) */	}	SiS310SetupCMDFlag(ivideo.SiS310_AccelDepth)	/* TW: The 310/325 series is smart enough to know the direction */}static voidSiS310SubsequentScreenToScreenCopy(int src_x, int src_y, int dst_x, int dst_y,                                int width, int height){	long srcbase, dstbase;	int mymin, mymax;	srcbase = dstbase = 0;	mymin = min(src_y, dst_y);	mymax = max(src_y, dst_y);		/* Although the chip knows the direction to use	 * if the source and destination areas overlap, 	 * that logic fails if we fiddle with the bitmap	 * addresses. Therefore, we check if the source	 * and destination blitting areas overlap and 	 * adapt the bitmap addresses synchronously 	 * if the coordinates exceed the valid range.	 * The the areas do not overlap, we do our 	 * normal check.	 */	if((mymax - mymin) < height) { 	   if((src_y >= 2048) || (dst_y >= 2048)) {	      	      srcbase = ivideo.video_linelength * mymin;	      dstbase = ivideo.video_linelength * mymin;	      src_y -= mymin;	      dst_y -= mymin;	   }	} else {	   if(src_y >= 2048) {	      srcbase = ivideo.video_linelength * src_y;	      src_y = 0;	   }	   if(dst_y >= 2048) {	      dstbase = ivideo.video_linelength * dst_y;	      dst_y = 0;	   }	}	SiS310SetupSRCBase(srcbase);	SiS310SetupDSTBase(dstbase);	SiS310SetupRect(width, height)	SiS310SetupSRCXY(src_x, src_y)	SiS310SetupDSTXY(dst_x, dst_y)	SiS310DoCMD}static voidSiS310SetupForSolidFill(int color, int rop, unsigned int planemask){	SiS310SetupPATFG(color)	SiS310SetupDSTRect(ivideo.video_linelength, -1)	SiS310SetupDSTColorDepth(ivideo.DstColor);	SiS310SetupROP(sisPatALUConv[rop])	SiS310SetupCMDFlag(PATFG | ivideo.SiS310_AccelDepth)}static voidSiS310SubsequentSolidFillRect(int x, int y, int w, int h){	long dstbase;	dstbase = 0;	if(y >= 2048) {		dstbase = ivideo.video_linelength * y;		y = 0;	}	SiS310SetupDSTBase(dstbase)	SiS310SetupDSTXY(x,y)	SiS310SetupRect(w,h)	SiS310SetupCMDFlag(BITBLT)	SiS310DoCMD}/* --------------------------------------------------------------------- *//* The exported routines */int sisfb_initaccel(void){#ifdef SISFB_USE_SPINLOCKS    spin_lock_init(&ivideo.lockaccel);