[mirror_ubuntu-focal-kernel.git] / drivers / video / sis / sis_accel.c

/*
 * SiS 300/540/630[S]/730[S],
 * SiS 315[E|PRO]/550/[M]650/651/[M]661[F|M]X/740/[M]741[GX]/330/[M]760[GX],
 * XGI V3XT/V5/V8, Z7
 * frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
 *
 * 2D acceleration part
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the named License,
 * or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
 *
 * Based on the XFree86/X.org driver which is
 *     Copyright (C) 2001-2005 by Thomas Winischhofer, Vienna, Austria
 *
 * Author: Thomas Winischhofer <thomas@winischhofer.net>
 *			(see http://www.winischhofer.net/
 *			for more information and updates)
 */

#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fb.h>
#include <linux/ioport.h>
#include <linux/types.h>
#include <asm/io.h>

#include "sis.h"
#include "sis_accel.h"

static const u8 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 u8 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 */
};

static const int myrops[] = {
   	3, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
};

/* 300 series ----------------------------------------------------- */
#ifdef CONFIG_FB_SIS_300
static void
SiS300Sync(struct sis_video_info *ivideo)
{
	SiS300Idle
}

static void
SiS300SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int xdir, int ydir,
                                 int rop, int trans_color)
{
	SiS300SetupDSTColorDepth(ivideo->DstColor);
	SiS300SetupSRCPitch(ivideo->video_linelength)
	SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)

	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 void
SiS300SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x,
				   int src_y, int dst_x, int dst_y, int width, int height)
{
	u32 srcbase = 0, 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 void
SiS300SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
{
	SiS300SetupPATFG(color)
	SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
	SiS300SetupDSTColorDepth(ivideo->DstColor);
	SiS300SetupROP(sisPatALUConv[rop])
	SiS300SetupCMDFlag(PATFG)
}

static void
SiS300SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
{
	u32 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
}
#endif

/* 315/330/340 series ---------------------------------------------- */

#ifdef CONFIG_FB_SIS_315
static void
SiS310Sync(struct sis_video_info *ivideo)
{
	SiS310Idle
}

static void
SiS310SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int rop, int trans_color)
{
	SiS310SetupDSTColorDepth(ivideo->DstColor);
	SiS310SetupSRCPitch(ivideo->video_linelength)
	SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
	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)
	/* The chip is smart enough to know the direction */
}

static void
SiS310SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x, int src_y,
			 int dst_x, int dst_y, int width, int height)
{
	u32 srcbase = 0, dstbase = 0;
	int mymin = min(src_y, dst_y);
	int 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;
		}
	}

	srcbase += ivideo->video_offset;
	dstbase += ivideo->video_offset;

	SiS310SetupSRCBase(srcbase);
	SiS310SetupDSTBase(dstbase);
	SiS310SetupRect(width, height)
	SiS310SetupSRCXY(src_x, src_y)
	SiS310SetupDSTXY(dst_x, dst_y)
	SiS310DoCMD
}

static void
SiS310SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
{
	SiS310SetupPATFG(color)
	SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
	SiS310SetupDSTColorDepth(ivideo->DstColor);
	SiS310SetupROP(sisPatALUConv[rop])
	SiS310SetupCMDFlag(PATFG | ivideo->SiS310_AccelDepth)
}

static void
SiS310SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
{
	u32 dstbase = 0;

	if(y >= 2048) {
		dstbase = ivideo->video_linelength * y;
		y = 0;
	}
	dstbase += ivideo->video_offset;
	SiS310SetupDSTBase(dstbase)
	SiS310SetupDSTXY(x,y)
	SiS310SetupRect(w,h)
	SiS310SetupCMDFlag(BITBLT)
	SiS310DoCMD
}
#endif

/* --------------------------------------------------------------------- */

/* The exported routines */

int sisfb_initaccel(struct sis_video_info *ivideo)
{
#ifdef SISFB_USE_SPINLOCKS
	spin_lock_init(&ivideo->lockaccel);
#endif
	return 0;
}

void sisfb_syncaccel(struct sis_video_info *ivideo)
{
	if(ivideo->sisvga_engine == SIS_300_VGA) {
#ifdef CONFIG_FB_SIS_300
		SiS300Sync(ivideo);
#endif
	} else {
#ifdef CONFIG_FB_SIS_315
		SiS310Sync(ivideo);
#endif
	}
}

int fbcon_sis_sync(struct fb_info *info)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
	CRITFLAGS

	if((!ivideo->accel) || (!ivideo->engineok))
		return 0;

	CRITBEGIN
	sisfb_syncaccel(ivideo);
	CRITEND

	return 0;
}

void fbcon_sis_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
	u32 col = 0;
	u32 vxres = info->var.xres_virtual;
	u32 vyres = info->var.yres_virtual;
	int width, height;
	CRITFLAGS

	if(info->state != FBINFO_STATE_RUNNING)
		return;

	if((!ivideo->accel) || (!ivideo->engineok)) {
		cfb_fillrect(info, rect);
		return;
	}

	if(!rect->width || !rect->height || rect->dx >= vxres || rect->dy >= vyres)
		return;

	/* Clipping */
	width = ((rect->dx + rect->width) > vxres) ? (vxres - rect->dx) : rect->width;
	height = ((rect->dy + rect->height) > vyres) ? (vyres - rect->dy) : rect->height;

	switch(info->var.bits_per_pixel) {
	case 8:  col = rect->color;
		 break;
	case 16:
	case 32: col = ((u32 *)(info->pseudo_palette))[rect->color];
		 break;
	}

	if(ivideo->sisvga_engine == SIS_300_VGA) {
#ifdef CONFIG_FB_SIS_300
		CRITBEGIN
		SiS300SetupForSolidFill(ivideo, col, myrops[rect->rop]);
		SiS300SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
		CRITEND
#endif
	} else {
#ifdef CONFIG_FB_SIS_315
		CRITBEGIN
		SiS310SetupForSolidFill(ivideo, col, myrops[rect->rop]);
		SiS310SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
		CRITEND
#endif
	}

	sisfb_syncaccel(ivideo);
}

void fbcon_sis_copyarea(struct fb_info *info, const struct fb_copyarea *area)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
	u32 vxres = info->var.xres_virtual;
	u32 vyres = info->var.yres_virtual;
	int width = area->width;
	int height = area->height;
	CRITFLAGS

	if(info->state != FBINFO_STATE_RUNNING)
		return;

	if((!ivideo->accel) || (!ivideo->engineok)) {
		cfb_copyarea(info, area);
		return;
	}

	if(!width || !height ||
	   area->sx >= vxres || area->sy >= vyres ||
	   area->dx >= vxres || area->dy >= vyres)
		return;

	/* Clipping */
	if((area->sx + width) > vxres) width = vxres - area->sx;
	if((area->dx + width) > vxres) width = vxres - area->dx;
	if((area->sy + height) > vyres) height = vyres - area->sy;
	if((area->dy + height) > vyres) height = vyres - area->dy;

	if(ivideo->sisvga_engine == SIS_300_VGA) {
#ifdef CONFIG_FB_SIS_300
		int xdir, ydir;

		if(area->sx < area->dx) xdir = 0;
		else                    xdir = 1;
		if(area->sy < area->dy) ydir = 0;
		else                    ydir = 1;

		CRITBEGIN
		SiS300SetupForScreenToScreenCopy(ivideo, xdir, ydir, 3, -1);
		SiS300SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
					area->dx, area->dy, width, height);
		CRITEND
#endif
	} else {
#ifdef CONFIG_FB_SIS_315
		CRITBEGIN
		SiS310SetupForScreenToScreenCopy(ivideo, 3, -1);
		SiS310SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
					area->dx, area->dy, width, height);
		CRITEND
#endif
	}

	sisfb_syncaccel(ivideo);
}
Commit	Line	Data
1da177e4	1	/*
544393fe TW	2	* SiS 300/540/630[S]/730[S],
	3	* SiS 315[E\|PRO]/550/[M]650/651/[M]661[F\|M]X/740/[M]741[GX]/330/[M]760[GX],
	4	* XGI V3XT/V5/V8, Z7
	5	* frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
1da177e4 LT	6	*
	7	* 2D acceleration part
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the named License,
	12	* or any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
	22	*
	23	* Based on the XFree86/X.org driver which is
544393fe	24	* Copyright (C) 2001-2005 by Thomas Winischhofer, Vienna, Austria
1da177e4 LT	25	*
	26	* Author: Thomas Winischhofer <thomas@winischhofer.net>
	27	* (see http://www.winischhofer.net/
	28	* for more information and updates)
	29	*/
	30
1da177e4 LT	31	#include <linux/version.h>
	32	#include <linux/module.h>
	33	#include <linux/kernel.h>
1da177e4	34	#include <linux/fb.h>
1da177e4	35	#include <linux/ioport.h>
1da177e4	36	#include <linux/types.h>
1da177e4 LT	37	#include <asm/io.h>
1da177e4 LT	38
1da177e4 LT	39	#include "sis.h"
	40	#include "sis_accel.h"
	41
	42	static const u8 sisALUConv[] =
	43	{
	44	0x00, /* dest = 0; 0, GXclear, 0 */
	45	0x88, /* dest &= src; DSa, GXand, 0x1 */
	46	0x44, /* dest = src & ~dest; SDna, GXandReverse, 0x2 */
	47	0xCC, /* dest = src; S, GXcopy, 0x3 */
	48	0x22, /* dest &= ~src; DSna, GXandInverted, 0x4 */
	49	0xAA, /* dest = dest; D, GXnoop, 0x5 */
	50	0x66, /* dest = ^src; DSx, GXxor, 0x6 */
	51	0xEE, /* dest \|= src; DSo, GXor, 0x7 */
	52	0x11, /* dest = ~src & ~dest; DSon, GXnor, 0x8 */
	53	0x99, /* dest ^= ~src ; DSxn, GXequiv, 0x9 */
	54	0x55, /* dest = ~dest; Dn, GXInvert, 0xA */
	55	0xDD, /* dest = src\|~dest ; SDno, GXorReverse, 0xB */
	56	0x33, /* dest = ~src; Sn, GXcopyInverted, 0xC */
	57	0xBB, /* dest \|= ~src; DSno, GXorInverted, 0xD */
	58	0x77, /* dest = ~src\|~dest; DSan, GXnand, 0xE */
	59	0xFF, /* dest = 0xFF; 1, GXset, 0xF */
	60	};
	61	/* same ROP but with Pattern as Source */
	62	static const u8 sisPatALUConv[] =
	63	{
	64	0x00, /* dest = 0; 0, GXclear, 0 */
	65	0xA0, /* dest &= src; DPa, GXand, 0x1 */
	66	0x50, /* dest = src & ~dest; PDna, GXandReverse, 0x2 */
	67	0xF0, /* dest = src; P, GXcopy, 0x3 */
	68	0x0A, /* dest &= ~src; DPna, GXandInverted, 0x4 */
	69	0xAA, /* dest = dest; D, GXnoop, 0x5 */
	70	0x5A, /* dest = ^src; DPx, GXxor, 0x6 */
	71	0xFA, /* dest \|= src; DPo, GXor, 0x7 */
	72	0x05, /* dest = ~src & ~dest; DPon, GXnor, 0x8 */
	73	0xA5, /* dest ^= ~src ; DPxn, GXequiv, 0x9 */
	74	0x55, /* dest = ~dest; Dn, GXInvert, 0xA */
	75	0xF5, /* dest = src\|~dest ; PDno, GXorReverse, 0xB */
	76	0x0F, /* dest = ~src; Pn, GXcopyInverted, 0xC */
	77	0xAF, /* dest \|= ~src; DPno, GXorInverted, 0xD */
	78	0x5F, /* dest = ~src\|~dest; DPan, GXnand, 0xE */
	79	0xFF, /* dest = 0xFF; 1, GXset, 0xF */
	80	};
	81
1da177e4 LT	82	static const int myrops[] = {
	83	3, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
	84	};
1da177e4 LT	85
	86	/* 300 series ----------------------------------------------------- */
	87	#ifdef CONFIG_FB_SIS_300
	88	static void
	89	SiS300Sync(struct sis_video_info *ivideo)
	90	{
	91	SiS300Idle
	92	}
	93
	94	static void
	95	SiS300SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int xdir, int ydir,
	96	int rop, int trans_color)
	97	{
	98	SiS300SetupDSTColorDepth(ivideo->DstColor);
	99	SiS300SetupSRCPitch(ivideo->video_linelength)
	100	SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
	101
	102	if(trans_color != -1) {
	103	SiS300SetupROP(0x0A)
	104	SiS300SetupSRCTrans(trans_color)
	105	SiS300SetupCMDFlag(TRANSPARENT_BITBLT)
	106	} else {
	107	SiS300SetupROP(sisALUConv[rop])
	108	}
	109	if(xdir > 0) {
	110	SiS300SetupCMDFlag(X_INC)
	111	}
	112	if(ydir > 0) {
	113	SiS300SetupCMDFlag(Y_INC)
	114	}
	115	}
	116
	117	static void
	118	SiS300SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x,
	119	int src_y, int dst_x, int dst_y, int width, int height)
	120	{
	121	u32 srcbase = 0, dstbase = 0;
	122
	123	if(src_y >= 2048) {
	124	srcbase = ivideo->video_linelength * src_y;
	125	src_y = 0;
	126	}
	127	if(dst_y >= 2048) {
	128	dstbase = ivideo->video_linelength * dst_y;
	129	dst_y = 0;
	130	}
	131
	132	SiS300SetupSRCBase(srcbase);
	133	SiS300SetupDSTBase(dstbase);
	134
	135	if(!(ivideo->CommandReg & X_INC)) {
	136	src_x += width-1;
	137	dst_x += width-1;
	138	}
	139	if(!(ivideo->CommandReg & Y_INC)) {
	140	src_y += height-1;
	141	dst_y += height-1;
	142	}
	143	SiS300SetupRect(width, height)
	144	SiS300SetupSRCXY(src_x, src_y)
	145	SiS300SetupDSTXY(dst_x, dst_y)
	146	SiS300DoCMD
	147	}
	148
149	static void
150	SiS300SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
151	{
152	SiS300SetupPATFG(color)
153	SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
154	SiS300SetupDSTColorDepth(ivideo->DstColor);
155	SiS300SetupROP(sisPatALUConv[rop])
156	SiS300SetupCMDFlag(PATFG)
157	}
158
159	static void
160	SiS300SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
161	{
162	u32 dstbase = 0;
163
164	if(y >= 2048) {
165	dstbase = ivideo->video_linelength * y;
166	y = 0;
167	}
168	SiS300SetupDSTBase(dstbase)
169	SiS300SetupDSTXY(x,y)
170	SiS300SetupRect(w,h)
171	SiS300SetupCMDFlag(X_INC \| Y_INC \| BITBLT)
172	SiS300DoCMD
173	}
174	#endif
175
544393fe	176	/* 315/330/340 series ---------------------------------------------- */
1da177e4 LT	177
	178	#ifdef CONFIG_FB_SIS_315
	179	static void
	180	SiS310Sync(struct sis_video_info *ivideo)
	181	{
	182	SiS310Idle
	183	}
	184
	185	static void
	186	SiS310SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int rop, int trans_color)
	187	{
	188	SiS310SetupDSTColorDepth(ivideo->DstColor);
	189	SiS310SetupSRCPitch(ivideo->video_linelength)
544393fe	190	SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
1da177e4 LT	191	if(trans_color != -1) {
	192	SiS310SetupROP(0x0A)
	193	SiS310SetupSRCTrans(trans_color)
	194	SiS310SetupCMDFlag(TRANSPARENT_BITBLT)
	195	} else {
	196	SiS310SetupROP(sisALUConv[rop])
	197	/* Set command - not needed, both 0 */
	198	/* SiSSetupCMDFlag(BITBLT \| SRCVIDEO) */
	199	}
	200	SiS310SetupCMDFlag(ivideo->SiS310_AccelDepth)
544393fe	201	/* The chip is smart enough to know the direction */
1da177e4 LT	202	}
	203
	204	static void
	205	SiS310SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x, int src_y,
	206	int dst_x, int dst_y, int width, int height)
	207	{
	208	u32 srcbase = 0, dstbase = 0;
	209	int mymin = min(src_y, dst_y);
	210	int mymax = max(src_y, dst_y);
544393fe	211
1da177e4	212	/* Although the chip knows the direction to use
544393fe	213	* if the source and destination areas overlap,
1da177e4 LT	214	* that logic fails if we fiddle with the bitmap
1da177e4 LT	215	* addresses. Therefore, we check if the source
544393fe TW	216	* and destination blitting areas overlap and
544393fe TW	217	* adapt the bitmap addresses synchronously
1da177e4	218	* if the coordinates exceed the valid range.
544393fe	219	* The the areas do not overlap, we do our
1da177e4 LT	220	* normal check.
1da177e4 LT	221	*/
544393fe TW	222	if((mymax - mymin) < height) {
	223	if((src_y >= 2048) \|\| (dst_y >= 2048)) {
	224	srcbase = ivideo->video_linelength * mymin;
	225	dstbase = ivideo->video_linelength * mymin;
	226	src_y -= mymin;
	227	dst_y -= mymin;
	228	}
1da177e4	229	} else {
544393fe TW	230	if(src_y >= 2048) {
	231	srcbase = ivideo->video_linelength * src_y;
	232	src_y = 0;
	233	}
	234	if(dst_y >= 2048) {
	235	dstbase = ivideo->video_linelength * dst_y;
	236	dst_y = 0;
	237	}
1da177e4 LT	238	}
1da177e4 LT	239
544393fe TW	240	srcbase += ivideo->video_offset;
	241	dstbase += ivideo->video_offset;
	242
1da177e4 LT	243	SiS310SetupSRCBase(srcbase);
	244	SiS310SetupDSTBase(dstbase);
	245	SiS310SetupRect(width, height)
	246	SiS310SetupSRCXY(src_x, src_y)
	247	SiS310SetupDSTXY(dst_x, dst_y)
	248	SiS310DoCMD
	249	}
	250
	251	static void
	252	SiS310SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
	253	{
	254	SiS310SetupPATFG(color)
544393fe	255	SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
1da177e4 LT	256	SiS310SetupDSTColorDepth(ivideo->DstColor);
	257	SiS310SetupROP(sisPatALUConv[rop])
	258	SiS310SetupCMDFlag(PATFG \| ivideo->SiS310_AccelDepth)
	259	}
	260
	261	static void
	262	SiS310SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
	263	{
	264	u32 dstbase = 0;
	265
	266	if(y >= 2048) {
	267	dstbase = ivideo->video_linelength * y;
	268	y = 0;
	269	}
544393fe	270	dstbase += ivideo->video_offset;
1da177e4 LT	271	SiS310SetupDSTBase(dstbase)
	272	SiS310SetupDSTXY(x,y)
	273	SiS310SetupRect(w,h)
	274	SiS310SetupCMDFlag(BITBLT)
	275	SiS310DoCMD
	276	}
	277	#endif
	278
	279	/* --------------------------------------------------------------------- */
	280
	281	/* The exported routines */
	282
	283	int sisfb_initaccel(struct sis_video_info *ivideo)
	284	{
	285	#ifdef SISFB_USE_SPINLOCKS
544393fe	286	spin_lock_init(&ivideo->lockaccel);
1da177e4	287	#endif
544393fe	288	return 0;
1da177e4 LT	289	}
	290
	291	void sisfb_syncaccel(struct sis_video_info *ivideo)
	292	{
544393fe	293	if(ivideo->sisvga_engine == SIS_300_VGA) {
1da177e4	294	#ifdef CONFIG_FB_SIS_300
544393fe	295	SiS300Sync(ivideo);
1da177e4	296	#endif
544393fe	297	} else {
1da177e4	298	#ifdef CONFIG_FB_SIS_315
544393fe	299	SiS310Sync(ivideo);
1da177e4	300	#endif
544393fe	301	}
1da177e4 LT	302	}
1da177e4 LT	303
1da177e4 LT	304	int fbcon_sis_sync(struct fb_info *info)
1da177e4 LT	305	{
544393fe TW	306	struct sis_video_info ivideo = (struct sis_video_info )info->par;
544393fe TW	307	CRITFLAGS
1da177e4	308
544393fe TW	309	if((!ivideo->accel) \|\| (!ivideo->engineok))
544393fe TW	310	return 0;
1da177e4	311
544393fe TW	312	CRITBEGIN
	313	sisfb_syncaccel(ivideo);
	314	CRITEND
	315
	316	return 0;
1da177e4 LT	317	}
	318
	319	void fbcon_sis_fillrect(struct fb_info info, const struct fb_fillrect rect)
	320	{
544393fe TW	321	struct sis_video_info ivideo = (struct sis_video_info )info->par;
	322	u32 col = 0;
	323	u32 vxres = info->var.xres_virtual;
	324	u32 vyres = info->var.yres_virtual;
	325	int width, height;
	326	CRITFLAGS
	327
	328	if(info->state != FBINFO_STATE_RUNNING)
	329	return;
	330
	331	if((!ivideo->accel) \|\| (!ivideo->engineok)) {
	332	cfb_fillrect(info, rect);
	333	return;
	334	}
	335
	336	if(!rect->width \|\| !rect->height \|\| rect->dx >= vxres \|\| rect->dy >= vyres)
	337	return;
	338
	339	/* Clipping */
	340	width = ((rect->dx + rect->width) > vxres) ? (vxres - rect->dx) : rect->width;
	341	height = ((rect->dy + rect->height) > vyres) ? (vyres - rect->dy) : rect->height;
	342
	343	switch(info->var.bits_per_pixel) {
1da177e4 LT	344	case 8: col = rect->color;
	345	break;
	346	case 16:
	347	case 32: col = ((u32 *)(info->pseudo_palette))[rect->color];
	348	break;
544393fe	349	}
1da177e4	350
544393fe	351	if(ivideo->sisvga_engine == SIS_300_VGA) {
1da177e4	352	#ifdef CONFIG_FB_SIS_300
544393fe TW	353	CRITBEGIN
	354	SiS300SetupForSolidFill(ivideo, col, myrops[rect->rop]);
	355	SiS300SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
	356	CRITEND
1da177e4	357	#endif
544393fe	358	} else {
1da177e4	359	#ifdef CONFIG_FB_SIS_315
544393fe TW	360	CRITBEGIN
	361	SiS310SetupForSolidFill(ivideo, col, myrops[rect->rop]);
	362	SiS310SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
	363	CRITEND
1da177e4	364	#endif
544393fe	365	}
1da177e4	366
544393fe	367	sisfb_syncaccel(ivideo);
1da177e4 LT	368	}
	369
	370	void fbcon_sis_copyarea(struct fb_info info, const struct fb_copyarea area)
	371	{
544393fe TW	372	struct sis_video_info ivideo = (struct sis_video_info )info->par;
	373	u32 vxres = info->var.xres_virtual;
	374	u32 vyres = info->var.yres_virtual;
	375	int width = area->width;
	376	int height = area->height;
1da177e4 LT	377	CRITFLAGS
1da177e4 LT	378
544393fe TW	379	if(info->state != FBINFO_STATE_RUNNING)
544393fe TW	380	return;
1da177e4	381
544393fe TW	382	if((!ivideo->accel) \|\| (!ivideo->engineok)) {
	383	cfb_copyarea(info, area);
	384	return;
1da177e4	385	}
1da177e4	386
544393fe TW	387	if(!width \|\| !height \|\|
	388	area->sx >= vxres \|\| area->sy >= vyres \|\|
	389	area->dx >= vxres \|\| area->dy >= vyres)
	390	return;
1da177e4	391
544393fe TW	392	/* Clipping */
	393	if((area->sx + width) > vxres) width = vxres - area->sx;
	394	if((area->dx + width) > vxres) width = vxres - area->dx;
	395	if((area->sy + height) > vyres) height = vyres - area->sy;
	396	if((area->dy + height) > vyres) height = vyres - area->dy;
1da177e4 LT	397
	398	if(ivideo->sisvga_engine == SIS_300_VGA) {
	399	#ifdef CONFIG_FB_SIS_300
544393fe TW	400	int xdir, ydir;
	401
	402	if(area->sx < area->dx) xdir = 0;
	403	else xdir = 1;
	404	if(area->sy < area->dy) ydir = 0;
	405	else ydir = 1;
	406
	407	CRITBEGIN
	408	SiS300SetupForScreenToScreenCopy(ivideo, xdir, ydir, 3, -1);
	409	SiS300SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
	410	area->dx, area->dy, width, height);
	411	CRITEND
1da177e4 LT	412	#endif
	413	} else {
	414	#ifdef CONFIG_FB_SIS_315
544393fe TW	415	CRITBEGIN
	416	SiS310SetupForScreenToScreenCopy(ivideo, 3, -1);
	417	SiS310SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
	418	area->dx, area->dy, width, height);
	419	CRITEND
1da177e4	420	#endif
1da177e4 LT	421	}
1da177e4 LT	422
544393fe	423	sisfb_syncaccel(ivideo);
1da177e4	424	}